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| United States Patent |
5,776,584
|
|
Haraga
, et al.
|
July 7, 1998
|
Bonded assembly, method of jointing for preparation thereof and rivet
Abstract
The present invention relates to a bonded assembly characterized in that a
board having a convexed portion on a jointing surface thereof and a board
having, on a jointing surface thereof, a concaved portion or a through
hole to be engaged with the convexed portion are jointed with adhesives.
Also, the present invention relates to a bonded assembly characterized in
that an adhesive is coated on the portion other than the convexed portion
of the board so that the coating thickness is smaller than the height of
the convexed portion, and then the board is jointed to another board
having a concaved portion or a through hole, after making alignment of the
boards. Further, the present invention relates to a rivet having means for
fitting to and temporarily fixing to an inserting through hole, and a
method of jointing boards which comprises a step for inserting, fitting
and temporarily fixing the rivet having the means for temporarily fixing
to the inserting through hole on the board. The present invention can
provide a highly reliable bonded assembly, a method of jointing boards
therefor and a rivet for facilitating jointing the boards, which assure
easy and accurate alignment of the boards, secure an adhesive coating
thickness required, prevent the adhesive from adhering to unnecessary
portions and increase the strength as the bonded assembly.
| Inventors:
|
Haraga; Kosuke (Amagasaki, JP);
Yagi; Naoki (Amagasaki, JP);
Nakashima; Yoshinobu (Nagasaki, JP);
Ganryu; Yuzi (Kobe, JP);
Sasaki; Tsutomu (Amagasaki, JP);
Takimoto; Atsushi (Amagasaki, JP);
Komazawa; Yosiro (Tokyo, JP);
Okuda; Asao (Inazawa, JP);
Takagi; Shoji (Marugame, JP);
Matsukawa; Akifumi (Marugame, JP);
Urata; Hideaki (Wakayama, JP);
Kawashima; Yasushi (Nagoya, JP);
Masuo; Kazumi (Kamakura, JP);
Honma; Kenji (Koriyama, JP);
Ikeda; Isao (Nagasaki, JP)
|
| Assignee:
|
Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)
|
| Appl. No.:
|
545276 |
| Filed:
|
October 19, 1995 |
Foreign Application Priority Data
| Intern'l Class: |
F16B 001/48; B32B 003/26 |
| Field of Search: |
428/132,133,161,162,139,140
403/375,381
|
References Cited
U.S. Patent Documents
| 4336678 | Jun., 1982 | Peters | 52/729.
|
| 4564550 | Jan., 1986 | Tschudin-Mahrer | 428/159.
|
| 4865894 | Sep., 1989 | Shubow | 428/59.
|
| 5075150 | Dec., 1991 | Webb et al. | 428/162.
|
| Foreign Patent Documents |
| 610 069 | Mar., 1979 | CS.
| |
| 17 99 027 | Oct., 1959 | DE.
| |
| 12 52 975 | Oct., 1967 | DE.
| |
| 16 96 268 | Jan., 1971 | DE.
| |
| 29 15 417 | Oct., 1980 | DE.
| |
| 94 09 731 | Oct., 1994 | DE.
| |
| 61 113504 | Jul., 1986 | JP.
| |
| 61-113503 | Jul., 1986 | JP.
| |
Other References
H. Ruegsegger, Zeitschrift fur Schwei.beta.technik/Journal de la Soudure,
vol. 59, No. 9, Sep. 10, 1969, pp. 261-264, "Fur Den
Konstrukteur--Hinweise Zur Klebgerechten Gestaltung Einfacher Blech--Und
Rohrkonstruktionen".
Japan Adhesion Association, vol. 25, No. 8 Jan. 1989, pp. 299-305 (English
Abstract) Dec. 1997.
|
Primary Examiner: Watkins; William P.
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Claims
What we claim is:
1. A bonded assembly comprising:
a first board having a convexed portion on a jointing surface thereof, said
convexed portion having a concave region for keeping adhesives therein;
a second board having a concaved portion on a jointing surface thereof to
be engaged with said convexed portion; and
adhesives interposed between the first and second boards for jointly
fastening said first and second boards;
wherein said concave region is provided on a top flat surface of the
convexed portion; and
a height of the convexed portion is larger than a depth of the concaved
portion to secure a thickness of an adhesive layer between the first and
the second boards.
2. The bonded assembly of claim 1, wherein the concave region has a bank
for keeping adhesive therein.
3. The bonded assembly of claim 1, wherein the first board is bonded in
parallel with the second board.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a bonded assembly characterized by
jointing a plurality of boards with adhesives or in combination use of
adhesives and fasteners such as screws and rivets, a method of jointing
the boards and a rivet, and can be used, for example, for assembling a
casing such as a control panel for electrical parts.
FIG. 46 is an exploded perspective view showing a conventional structure
for assembling a control panel disclosed, for example, in
JU-A-113503/1986. In the figure, the numeral 11 is a roof board, the
numeral 12 is a side board, the numeral 13 is a bottom board, the numeral
14 are through holes drilled at the time of board processing for inserting
fasteners, and the numeral 5 are jointing surfaces being hatched for
making clear. FIG. 47(a) to (d) show a method of jointing by a fastener
bonding. In FIG. 47(a), the numerals 1 and 2 are boards to be bonded.
Adhesives are coated on the board 2 for jointing as shown in (b). Then a
fastener 9 is inserted in a through hole 14 as shown in (c), and pressed
by a fastener riveter not shown in the figure to be deformed as shown by
10 in (d), thus jointing the boards. The above-mentioned works are
conducted with the adhesive 3 being in the un-cured state.
The conventional bonded assembly and the method of jointing for preparation
thereof are as explained above, and, for example, in the case of a casing
as shown in FIG. 46, of which length and depth of the base is about one
meter each and the height is not less than two meters, even a small
mis-alignment causes the completed casing to be inclined or distorted, and
therefore an accurate alignment between the bonding boards is necessary.
However, if the adhesives 3 are coated on each board, it results in
difficulty in aligning the boards, that is to say, the boards are first
placed in the neighborhood of their joint positions and then moved and
adjusted to the respective correct positions for alignment. Thus the
adhesives stick to unnecessary portions, which results in staining of the
boards and requires the excess adhesives to be wiped off or scraped off
for finishing up. Also, around the portion jointed with a fastener 10,
thickness of a coating layer is very thin, which causes various problems
such as lowering of adhesive strength and lowering of water tightness due
to occurrence of portions lacking in adhesives, thus making it impossible
to obtain a highly reliable bonded assembly.
The present invention was made to solve the above-mentioned problems. The
objects of the present invention are to provide a highly reliable bonded
assembly, a method of jointing therefor and rivets facilitating jointing
of boards, which assure an easy and accurate alignment of the boards to be
jointed, secure an adhesive coating thickness required, prevent the
adhesives from adhering to the unnecessary portions and enhance the
strength as the bonded assembly.
SUMMARY OF THE INVENTION
The first invention relates to an adhesive-bonded assembly of a board
having a convexed portion on a jointing surface thereof and a board
having, on a jointing surface thereof, a concaved portion or through hole
to be engaged with the convexed portion.
The second invention relates to a bonded assembly, in which in jointing a
plurality of boards with adhesives, at least one of the boards is provided
with a convexed portion on a jointing surface thereof.
The third invention relates to a bonded assembly, in which in jointing a
plurality of boards with adhesives, at least one of the boards is provided
with a through hole on an adhesive coating surface thereon.
The fourth invention relates to a bonded assembly, in which in any of the
first to the third inventions, a plurality of boards are jointed with
adhesive or in combination use of adhesives and fasteners such as rivets
and screws.
Further the fifth invention relates to a method of jointing for preparation
of a bonded assembly, in which in jointing, with adhesives, a board having
a convexed portion on a jointing surface thereof and a board having, on a
jointing surface thereof, a concaved portion or through hole to be engaged
with the convexed portion, the adhesives are coated on the portion other
than the convexed portion of the board so that the coating thickness is
smaller than the height of the convexed portion, and then the boards are
jointed after making alignment.
Further the sixth invention relates to rivets having means for fitting to
and temporarily fixing to an inserting through hole.
Further the seventh invention relates to a method of jointing for
preparation of a bonded assembly, comprising the step for inserting,
fitting and fixing, into a rivet inserting through hole on one board, a
rivet having means for fitting to and temporary fixing to the through
hole, the step for coating adhesive on the bonding surface of the board
with the rivet temporarily fixed thereto or another board having a rivet
inserting through hole, the step for inserting the rivet fixed to one
board into the through hole on another board and the step for fastening
the rivet.
Further the eighth invention relates to a bonded assembly, in which as an
adhesive, a modified acrylic adhesive is used.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a sectional view showing an essential part of a bonded assembly
of the 1st Example of the present invention.
FIG. 2 is a sectional view showing an essential part of a bonded assembly
of the 2nd Example of the present invention.
FIG. 3 is a sectional view showing an essential part of a bonded assembly
of the 3rd Example of the present invention.
FIG. 4 is a sectional view showing an essential part of a bonded assembly
of the 4th Example of the present invention.
FIG. 5 is a sectional view showing an essential part of a bonded assembly
of the 5th Example of the present invention.
FIG. 6 is a sectional view showing an essential part of a bonded assembly
of the 6th Example of the present invention.
FIG. 7 is a sectional view showing an essential part of a bonded assembly
of the 7th Example of the present invention.
FIG. 8 is a sectional view showing an essential part of a bonded assembly
of the 8th Example of the present invention.
FIG. 9 is a sectional view showing an essential part of a bonded assembly
of the 9th Example of the present invention.
FIG. 10 is a sectional view showing an essential part of a bonded assembly
of the 10th Example of the present invention.
FIG. 11 is a sectional view showing an essential part of a bonded assembly
of the 10th Example of the present invention.
FIG. 12 is a sectional view showing an essential part of a bonded assembly
of the 11th Example of the present invention.
FIG. 13 is a sectional view showing an essential part of a bonded assembly
of the 12th Example of the present invention.
FIG. 14 is a sectional view showing an essential part of a bonded assembly
of the 13th Example of the present invention.
FIG. 15 is a sectional view showing an essential part of a bonded assembly
of the 14th Example of the present invention.
FIG. 16 is a sectional view showing an essential part of a bonded assembly
of the 15th Example of the present invention.
FIG. 17 is a sectional view showing an essential part of a bonded assembly
of the 16th Example of the present invention.
FIG. 18 is a sectional view showing an essential part of a bonded assembly
of the 17th Example of the present invention.
FIG. 19 is a sectional view showing an essential part of a bonded assembly
of the 18th Example of the present invention.
FIG. 20 is a sectional view showing an essential part of a bonded assembly
of the 19th Example of the present invention.
FIG. 21 relates to the 19th Example of the present invention and shows a
section A--A of FIG. 20.
FIG. 22 relates to the 19th Example of the present invention and shows a
section A--A of FIG. 20.
FIG. 23 is a sectional view showing an essential part of a bonded assembly
of the 20th Example of the present invention.
FIG. 24 relates to the 20th Example of the present invention and shows a
section A--A of FIG. 23.
FIG. 25 relates to the 20th Example of the present invention and shows a
section A--A of FIG. 23.
FIG. 26 is a sectional view showing an essential part of a bonded assembly
of the 21st Example of the present invention.
FIG. 27 is a sectional view showing an essential part of a bonded assembly
of the 22nd Example of the present invention.
FIG. 28 is a sectional view showing an essential part of a bonded assembly
of the 22nd Example of the present invention.
FIG. 29 is a sectional view showing an essential part of a bonded assembly
of the 22nd Example of the present invention.
FIG. 30 is a sectional view showing an essential part of a bonded assembly
of the 23rd Example of the present invention.
FIG. 31 is a sectional view explaining a method of jointing for preparation
of a bonded assembly of the 24th Example of the present invention.
FIG. 32 is a sectional view explaining a method of jointing for preparation
of a bonded assembly of the 24th Example of the present invention.
FIG. 33 is a sectional view explaining a method of jointing for preparation
of a bonded assembly of the 25th Example of the present invention.
FIG. 34 is a sectional view explaining a method of jointing for preparation
of a bonded assembly of the 26th Example of the present invention.
FIG. 35 is a sectional view explaining a method of jointing for preparation
of a bonded assembly of the 27th Example of the present invention.
FIG. 36 is a sectional view explaining a method of jointing for preparation
of a bonded assembly of the 28th Example of the present invention.
FIG. 37 is a sectional view showing a rivet of the 29th Example of the
present invention.
FIGS. 38(a) and 38(b) are sectional views explaining a method of jointing
for preparation of a bonded assembly of the 29th Example of the present
invention.
FIGS. 39(a) and 39(b) show a rivet of the 30th Example of the present
invention. FIG. 39(a) is a longitudinal sectional view and FIG. 39(b) is a
sectional view A--A of FIG. 39(a).
FIGS. 40(a) and 40(b) relate to the 30th Example of the present invention
and are sectional views explaining a method of jointing for preparation of
a bonded assembly using the rivet shown in FIG. 39(a) and 39(b).
FIGS. 41(a) and 41(b) relate to the 31th Example of the present invention
and are sectional views explaining a method of jointing for preparation of
a bonded assembly using the rivet shown in FIGS. 41(a) and 41(b).
FIG. 42 is a sectional view of a rivet of the 32nd Example of the present
invention.
FIG. 43 is a bottom view of a rivet of the 32nd Example of the present
invention.
FIG. 44 is a perspective view of a rivet of the 33rd Example of the present
invention.
FIG. 45 is a section A--A of FIG. 44 showing a bonded assembly of the 33rd
Example of the present invention.
FIG. 46 is an exploded perspective view showing an assembly of the
conventional control panel.
FIGS. 47(a), 47(b), 47(c) and 47(d) are sectional views explaining a
conventional method of jointing.
DETAILED DESCRIPTION
The bonded assembly of the 1st invention assures an easy alignment by
engaging the convexed portion on the jointing surface of the board with
the concaved portion or through hole on the jointing surface of another
board.
According to the 1st invention, the convexed portion, concaved portion or
through hole is shaped tapered. It is preferable that the convexed portion
rests on the concaved portion or through hole at the tapered part, thereby
enabling all the more accurate alignment.
According to the 1st invention, it is preferable to make the height of the
convexed portion larger than the depth of the concaved portion, thus
securing the adhesives coating thickness required and enhancing a
reliability on adhesivity.
According to the 1st invention, the height of the convexed portion is made
smaller than the depth of the concaved portion, which assures the
adhesives coating thickness required at the engaged portion and enhances a
reliability on adhesivity.
According to the 1st invention, it is preferable to make the top of the
convexed portion being concave for maintaining adhesives therein, thus
enabling the adhesives to be maintained at the engaged portion and
enhancing a reliability on adhesivity.
According to the 1st invention, it is preferable that the convexed portion
is in the form of a cylinder and the concaved portion or through hole is
in the form of a polygonal prism, thus making it easy for the adhesives to
flow into a gap between the circle and the polygon at the engaged portion
and enhancing a reliability on adhesivity.
According to the 1st invention, it is preferable that the convexed portion
is in the polygonal or elliptic form similar to the concaved portion or
through hole, which prevents the boards from turning at the engaged
portion.
According to the 1st invention, it is preferable that at least one of the
boards is a sheet and the sheet itself is transformed in the thickness
direction thereof to provide the same form of the convexed and concaved
portions on the sheet. Thus the convexed and concaved portions can be
molded by a press, and processing of the sheet is easy.
The bonded assembly of the 2nd invention assures the adhesive coating
thickness required and enhances a reliability on adhesivity since in
jointing a plurality of boards, at least one of the boards is provided
with a convexed portion on a jointing surface.
The bonded assembly of the 3rd invention makes it easy to see where to coat
the adhesives and check the coated condition of the adhesives by seeing
whether or not the adhesives are flowing out of the through hole after the
boards are jointed because at least one of a plurality of boards is
provided with the through hole on the bonding surface thereof.
The bonded assembly of the 4th invention is one jointed with a plurality of
boards in combination use of the adhesives and fasteners in any of the
above-mentioned 1st to 3rd inventions, which makes it possible to assure
the temporary fixing until the adhesives are cured and to enhance the
strength as the bonded assembly.
According to the 4th invention, the boards can be jointed easily by the use
of rivets or screws as fasteners.
According to the 4th invention, wherein at least one of the boards is a
sheet, which is transformed in the thickness direction thereof to provide
the same form of convexed and concaved portions on both sides of the
sheet, the convexed portion formed on the sheet is engaged with the
concaved portion of another board, and the boards are jointed with the
fastener inserted in the through holes on the engaged portion of both the
sheet and the board, it is preferable that the depth of the concaved
portion formed on the back of the convexed portion of the sheet is larger
than the height of the protruding portion of the fastener, thus causing
the fastener not to protrude over the surface on the back of the jointing
surface of the sheet.
The method for jointing for preparation of the bonded assembly of the 5th
invention, wherein in jointing, with adhesives, the board having the
convexed portion on the jointing surface thereof and the board having, on
the jointing surface thereof, the concaved portion or through hole, the
adhesives are coated on the portion other than the convexed portion of the
board so that the adhesive coating thickness is smaller than the height of
the convexed portion and then the boards are jointed after making
alignment, thus making it possible to prevent the adhesives from adhering
to unnecessary portions at the time of jointing.
The rivet of the 6th invention has means for fitting and temporarily fixing
to the inserting through hole, which prevents the rivet from dropping
during a time period from inserting into the through hole up to fastening
and makes bonding works easy.
According to the 6th invention, means for temporarily fixing to the
inserting through hole is an elastic member or a projection provided on
the fitting portion of the rivet for easy formation of the fixing means.
According to the 6th invention, means for temporarily fixing to the
inserting through hole is a thin wall portion of the rivet, which is
pressed to expand in the direction of its diameter, thus surely fixing the
rivet temporarily to the inserting through hole.
The method of jointing for preparation of the bonded assembly of the 7th
invention comprises the step for inserting, fitting and fixing the rivet
of the 6th invention to the rivet inserting through hole of one board, the
step for coating adhesives on the bonding surface of the board with the
rivet temporarily fixed thereto or another board having the rivet
inserting through hole, the step for inserting the rivet inserted and
fixed to the board, into the rivet inserting through hole of another board
and the step for fastening the rivet. This method, as compared with the
method to insert and fasten the rivet after coating of adhesives, assures
easier alignment and jointing works because the rivet does not drop even
if inserted from below.
As the adhesive of the eighth invention to be used for the bonded assembly
of the present invention, the modified acrylic adhesive is preferable, and
epoxy type and urethane type adhesives can be also used.
The present inventions are explained concretely according to Examples and
Drawings, but are not limited thereto.
PREFERRED EMBODIMENTS OF THE INVENTION
FIG. 1 is a sectional view showing an essential part of the bonded assembly
of the 1st Example of the present invention. In FIG. 1, 1a is a convexed
portion formed on the jointing surface of the board 1, and 2a is a
concaved portion formed on the jointing surface of the board 2 and to be
engaged with the convexed portion la.
The convexed portion 1a is in the form of ridges or islands, and the
concaved portion 2a is in the form of grooves or ponds, corresponding to
the shape of the convexed portion 1a. This applies in the following
Examples unless otherwise explained.
As materials for the boards 1 and 2, there can be used metal, plastic and
the like. As adhesive 3, modified acrylic adhesives, epoxy adhesives,
urethane adhesives or the like can be used. This applies in the following
Examples, too.
FIG. 2 is a sectional view showing an essential part of the bonded assembly
of the 2nd Example of the present invention. In FIG. 2, 2b is a through
hole drilled on the jointing surface of the board 2 and is to be engaged
with the convexed portion 1a.
The through hole 2b is fabricated rather easily as compared with the
concaved portion 2a of Example 1.
FIG. 3 is a sectional view showing an essential part of the bonded assembly
of the 3rd Example of the present invention. In this Example, for
increasing accuracy of alignment, the size (L1) of the convexed portion 1a
is nearly the same as that (M1) of the concaved portion 2a to fit the
convexed portion 2a.
FIG. 4 is a sectional view showing an essential part of the bonded assembly
of the 4th Example of the present invention. In FIG. 4, 2c is a concaved
portion tapered for increasing accuracy of alignment, and the convexed
portion 1a rests on the tapered portion.
This Example shows the case where the concaved portion is tapered, but the
convexed portion may be tapered or both of the convexed and concaved
portions may be tapered. Further the through hole may be tapered.
FIG. 5 is a sectional view showing an essential part of the bonded assembly
of the 5th Example of the present invention. In FIG. 5, 1b is a convexed
portion provided on the jointing surface of the board 1 for securing the
thickness of an adhesive layer. The desired adhesive layer thickness can
be obtained by adjusting the height of the convexed portion 1b.
FIG. 6 is a sectional view showing an essential part of the bonded assembly
of the 6th Example of the present invention. This Example shows another
example of the convexed portion 1b of Example 5, where projections 1y are
provided. The projections 1y can be easily formed by sand blast, liquid
honing, electric discharge, grinding, drawing, extrusion, knurling,
etching, pickling, molding and the like.
FIG. 7 is a sectional view showing an essential part of the bonded assembly
of the 7th Example of the present invention. In FIG. 7, the numeral 4 is a
rivet, and 1d and 2d are the rivent inserting through holes drilled on the
convexed portion 1a and concaved portion 2a of the board 1 and 2
respectively. The combination use of the adhesive 3 and the fastener
(rivet 4 in this Example) can assure the temporary fixing until the
adhesive 3 is cured and enhance the strength as the bonded assembly.
FIG. 8 is a sectional view showing an essential part of the bonded assembly
of the 8th Example of the present invention, and the bolt 5a and nut 5b
are used as a fastener instead of the rivet 4 in FIG. 7. The same effect
as in the 7th Example can be obtained in this 8th Example.
FIG. 9 is a sectional view showing an essential part of the bonded assembly
of the 9th Example of the present invention. In this Example, in order to
increase accuracy of alignment, the sizes (L1) and (M1) of the convexed
portion 1a and the concaved portion 2a respectively are made nearly the
same in the same manner as in FIG. 3 so that the convexed portion 1a is
fitted to the concaved portion 2a, and the rivet 4 is also used, thus
assuring the temporary fixing of the boards until the adhesive 3 is cured,
and also enhancing the strength as the bonded assembly.
FIG. 10 and 11 are sectional views showing essential parts of the bonded
assembly with regard to the 10th Example of the present invention, and
mainly show examples of the deformation of fasteners. As shown in FIG. 10,
the convexed portion 1a is larger than the depth of the through hole 2b,
and the concaved portion is formed at the top of the convexed portion 1a.
The fastener is punched by a punch 16 and expands outward as shown in FIG.
11, thereby fastening the boards 1 and 2.
FIG. 12 is a sectional view showing an essential part of the bonded
assembly of the 11th Example of the present invention. In this Example,
the convexed portion is tapered to assure an accurate alignment and ensure
the adhesive layer thickness required. The size (L3) at the bottom of the
taper is larger than the size (M1) of the concaved portion, and the size
(L2) at the top of the taper is smaller than (M1), thus making the
convexed portion 1a to rest on the concaved portion 2a at the tapered
portion.
FIG. 13 is a sectional view showing an essential part of the bonded
assembly of the 12th Example of the present invention. In this Example,
the concaved portion is tapered for assuring an accurate alignment of the
boards and securing the adhesive layer thickness required. The size (M2)
at the top of the tapered portion 2c is larger than the size (L1) of the
convexed portion, and the size (M3) at the bottom of the tapered portion
2c is the same as a diameter of the rivet, thereby making the convexed
portion 1a to rest on the concaved portion at the tapered part.
FIG. 14 is a sectional view showing an essential part of the bonded
assembly of the 13th Example of the present invention. In this Example,
for securing the adhesive layer thickness (H3), the height (H1) of the
convexed portion 1a is larger than the depth (H2) of the concaved portion
by the adhesive layer thickness (H3).
FIG. 15 is a sectional view showing an essential part of the bonded
assembly of the 14th Example of the present invention. In this Example,
the concaved portion 1e has a bank for keeping the adhesives therein and
is formed at the top of the convexed portion la of the board 1 shown in
FIG. 14 to secure the adhesive layer thickness (H4).
FIG. 16 is a sectional view showing an essential part of the bonded
assembly of the 15th Example of the present invention. In this Example,
the height (H1) of the convexed portion 1a is smaller than the depth (H2)
of the concaved portion 2a by the adhesive layer thickness (H4) to secure
the thickness (H4) of the adhesive layer in the engaged portion.
FIG. 17 is a sectional view showing an essential part of the bonded
assembly of the 16th Example of the present invention. In this Example,
through holes 1d and 2d for fastening the rivet 4 are provided in the
convexed portion 1a formed on the jointing surface of the board 1 and in
the concaved portion formed on the jointing surface of the board 2
respectively of the bonded assembly shown in FIG. 14, and the rivet 4 is
fastened in order to assure the temporary fixing of the boards until the
adhesive is cured and enhance the strength and reliability as the bonded
assembly.
FIG. 18 is a sectional view showing an essential part of the bonded
assembly of the 17th Example of the present invention. In this Example,
through holes 1d and 2d for fastening the rivet 4 are provided in the
convexed portion la formed on the jointing surface of the board 1 and in
the concaved portion formed on the jointing surface of the board 2
respectively of the bonded assembly shown in FIG. 15, and the rivet 4 is
fastened in order to assure the temporary fixing of the boards until the
adhesive is cured and enhance the strength and reliability as the bonded
assembly.
FIG. 19 is a sectional view showing an essential part of the bonded
assembly of the 18th Example of the present invention. In this Example,
the through holes 1d and 2d are provided in the convexed portion 1a and
concaved portion 2a on the jointing surfaces of the boards 1 and 2
respectively of the bonded assembly shown in FIG. 16, and the boards are
jointed with the rivet 4 in order to assure the temporary fixing of the
boards until the adhesive is cured and enhance the strength and
reliability as the bonded assembly. Also the size of the convexed portion
1a is nearly the same as that of the concaved portion 2a for enhancing an
accuracy of alignment in fitting the convexed portion 1a to the concaved
portion 2a.
FIG. 20 is a sectional view showing an essential part of the bonded
assembly of the 19th Example of the present invention, and FIGS. 21 and 22
are a cross-section A--A of FIG. 20. In this Example, a section of the
convexed portion 1a is a circle as shown in FIGS. 21 and 22, i. e., the
convexed portion is in the form of a cylinder, and a section of the
concaved portion 2a is a polygon such as a square or an octagon, i.e., the
concaved portion 2a is a polygonal prism, thus making it easy for the
adhesive 3 to flow into the concaved portion 2a through a gap between the
circle and the polygon at the time of jointing the boards 1 and 2.
This Example shows the case where the shapes of the convexed portion 1a and
concaved portion 2a of the bonded assembly shown in FIG. 7 are specific
variations, but the present invention is not limited thereto. These
variations in shapes can be applied to the convexed portion la and
concaved portion 2a of the bonded assembly as shown in FIGS. 1, 3, 4, 8, 9
and 12 to 19.
FIG. 23 is a sectional view showing an essential part of the bonded
assembly of the 20th Example of the present invention. FIGS. 24 and 25 are
a cross-section A--A of FIG. 23. The sections of the convexed portions 1a
and 2a are in the form of a polygon such as a rectangle, an ellipse and
the like similar to each other, which prevents the boards from turning at
the engaged portion.
Though these examples show the case where the shapes of the convexed
portion 1a and concaved portion 2a of the bonded assembly shown in FIG. 7
are specific variations, the present invention is not limited thereto, but
these variations in shapes can also be applied to the convexed portion 1a
and concaved portion 2a of the bonded assembly as shown in FIGS. 1, 3, 4,
8, 9 and 12 to 19, and also to the engagement of the convexed portion la
with the through hole 2b as shown in FIG. 2.
FIG. 26 is a sectional view showing an essential part of the bonded
assembly of the 21st Example of the present invention. In this Example,
the both numerals 1 and 2 to be bonded are the sheets. The convexed
portion 1f is formed on the bonding surface of the sheet 1 by means of a
press, and the concaved portion 2f is formed on the mating surface of the
sheet 2 by means of a press so that the concaved portion 2f is engaged
with the convexed portion 1f. An easy and accurate alignment can be made
by resting the convexed portion 1f on the concaved portion 2f. The
convexed portion 1f and concaved portion 2f can be easily formed with a
press.
On the backs of the convexed portion 1f and concaved portions 2f are formed
the concaved and convexed portions respectively. That is to say, each
sheet itself is transformed so that the same form of the convexed and
concaved portions are provided on the same sheet.
FIGS. 27 to 29 are sectional views showing essential parts of the bonded
assembly of the 22nd Example of the present invention. This Example shows
the case where a plurality of projections are formed on at least one of
the bonding surfaces of the boards of the bonded assembly shown in FIG.
26, in order to secure the thickness of the adhesive layer. In FIG. 27,
the projections 1y are formed on the sheet 1, in FIG. 28, the projections
2y, on the sheet 2, and in FIG. 29, the projections 1y and 2y, on both
sheets 1 and 2.
The projections 1y and 2y can be formed by sand blasting, liquid honing,
electric discharge, grinding, drawing, extrusion, knurling, etching,
pickling, molding and the like.
FIG. 30 is a sectional view showing an essential part of the bonded
assembly of the 23rd Example of the present invention. In this Example, in
order to secure the thickness of the adhesive layer of the bonded assembly
shown in FIG. 26, both the convexed portion 1f and the concaved portion 2f
are tapered, and the maximum size (M4) of the concaved portion 2f is
smaller than the maximum size (L5) of the convexed portion but larger than
the minimum size (L4) of the convexed portion, thus making the concaved
portion 2f to rest in the middle of the tapered portion of the convexed
portion 1f to enable more accurate alignment and secure the adhesive layer
in either of the engaged portion between the convexed and concaved
portions and the other portions.
The above-mentioned Examples 21 to 23 explain the case where the both
boards 1 and 2 to be bonded are the sheets, but at least one of them may
be the sheet.
FIGS. 31 and 32 are sectional views explaining a method of jointing for
preparation of the bonded assembly of the 24th Example of the present
invention. In this Example, the adhesive 3 is coated on the bonding
surfaces other than the convexed portion 1f of the sheet 1 so that the
coated thickness (H6) is smaller than the height (H5) of the convexed
portion 1f, and then the sheet 1 is bonded with the sheet having the
concaved portion 2f after alignment. Thus until the sheets 1 and 2 are
engaged and bonded, the coated adhesive 3 does not adhere to the mating
surface of another sheet 2, which can prevent the adhesive 3 from adhering
to unnecessary portions and staining the sheet 2.
This Example explains the case where the sheets 1 and 2 are bonded, but the
present invention is not limited thereto. The sheet may be bonded to the
plate, or the both may be the plates. Also, the through hole may take
place of the concaved portion.
FIG. 33 is a sectional view showing an essential part of the bonded
assembly of the 25th Example of the present invention. This Example shows
the use of the rivet 4 in combination of adhesives at an engaging portion
for jointing of the bonded assembly of FIG. 26, which assures the
temporary fixing of the boards until the adhesives are cured and enhances
the strength as the bonded assembly.
FIG. 34 is a sectional view showing an essential part of the bonded
assembly of the 26th Example of the present invention, and the bolt 5a and
nut 5b are used instead of the rivet 4 of FIG. 33.
The 25th and 26th Examples explain the case where the fasteners are used on
the engaging portion of the bonded assembly shown in FIG. 26. The
fasteners may be used on the other bonded assemblies as shown in FIG. 27
to 30.
FIG. 35 is a sectional view showing an essential part of the bonded
assembly of the 27th Example of the present invention. In the bonded
assembly using the fasteners on the engaging portion as shown in FIG. 33,
in order to prevent the fasteners from protruding over the back surface of
the sheet, the depth (H8) of the concaved portion formed on the back of
the convexed portion 1f of the sheet 1 is larger than the height of the
protruding portion of the fastener, or the height (H7) of the head 4a of
the rivet 4 of this Example.
This Example shows a relation of the height (H7) of the protruding portion
of the fastener with the depth (H8) of the concaved portion in the bonded
assembly as shown in FIG. 33. This relation can be applied in the case
where the fasteners are used in combination of the adhesives on the bonded
assemblies as shown in FIGS. 27 to 30.
FIG. 36 is a sectional view showing an essential part of the bonded
assembly of the 28th Example of the present invention. In this Example,
the convexed portion 1g is formed on one board 1, and the through hole 2g
to be engaged with the convexed portion 1g is formed on another board 2.
Also the through holes 1d and 2d are formed on the portions other than the
engaged portion of the convexed portion 1g with the through hole 2g in
order to fasten the rivets there. The thickness of the adhesive layer is
secured by making the diameter (M5) of the through hole 2g being smaller
than the width (L5) of the convexed portion 1g.
According to this bonded assembly, the sizes of the convexed portion 1g and
through hole 2g can be made smaller as compared with the case of fastening
the rivet in the engaged portion, thereby making processing of the board
easy.
This example shows the case where the convexed portion 1g is engaged with
the through hole 2g, but the concaved portion may be used instead of the
through hole.
FIG. 37 is a sectional view showing a rivet of the 29th Example of the
present invention, and FIG. 38 is a sectional view explaining a method of
jointing for preparation of the bonded assembly using the rivet of FIG.
37. The rivet 4 has means for fitting and temporarily fixing to the
inserting through hole. In this Example, the elastic member 6 is covered
on the shank under the head of the rivet. As the elastic members, there
are used rubbers, coatings, adhesives, plastics, and the like which can be
formed easily.
Then the method of jointing is explained below. As shown in FIG. 38(a), the
rivet 4 is pushed in the rivet inserting through hole Id of the board 1.
In that case, the rivet 4 is temporarily fixed to the hole 1d of the board
1 by means of the elastic member 6 in the state not to be off from the
hole. Then the adhesive 3 is coated on the bonding surface of the board 1
with the rivet 4 temporarily fixed thereto or another board 2 having the
rivet inserting through hole 2d. The rivet 4 inserted and fixed to the
board 1 is then inserted in the through hole 2d of another board 2, and
fastened to obtain the bonded assembly as shown in FIG. 38(b).
This Example assures easy alignment as compared with the case where the
rivet is inserted and fastened after coating of the adhesive 3, and as
shown in FIG. 38, the rivet 4 does not drop even when inserted from below,
thus giving an effect such as easy joint works.
FIG. 38 shows an example of fastening a rivet at the flat surface of the
board for easy understanding, but this method of jointing for preparation
can also be applied in the case where the rivet is used for engaging of
the convexed and concaved portions. This is the same as in the following
Examples.
FIG. 39 shows a rivet of the 30th Example of the present invention. FIG.
39(a) is a longitudinal section, and FIG. 39(b) is a cross-section A--A of
FIG. 39(a). FIG. 40 is a sectional view explaining a method of jointing of
the bonded assembly using the rivet shown in FIG. 39. The rivet 4 has
means for fitting and temporarily fixing to the inserting through hole. In
this Example, a hollow 4d is provided at the fitting portion 4c under the
head of the rivet, and a wall thickness of this portion near the head of
the rivet is thinner than that at the end of the rivet. The portion 4c
expands as shown in FIG. 40(a) by slightly pulling up the mandrel 4b, and
the rivet can be temporarily fixed in the rivet inserting through hole 1d,
thus surely fixing the rivet temporarily in the through hole.
The method of jointing of the bonded assembly is then explained below. As
shown in FIG. 39(a), the rivet 4 is inserted in the rivet inserting
through hole 1d of the board 1, and the mandrel 4b is slightly pulled to
expand the hollowed portion 4C as shown in FIG. 40(a). Thus the rivet 4 is
temporarily fixed to the rivet inserting through hole not to be pulled out
easily. Then the adhesive 3 is coated on the bonding surface of the board
1 with the rivet 4 temporarily fixed thereto or on another board 2 having
the rivet inserting through hole 2d, and the rivet 4 fixed to the board 1
is then inserted in the rivet inserting through hole 2d on another board
2. Afterwards the mandrel 4b is further pulled to fasten the rivet 4 and
obtain the bonded assembly as shown in FIG. 40(b).
According to this example, as compared with the case of inserting and
fastening the rivet 4 after coating of adhesives 3, alignment of the
boards is easy, and as shown in FIG. 40, the rivet 4 does not drop even if
inserted from below, thus giving an effect such as easiness of joint
works.
FIG. 41 shows the rivet of the 31st Example of the present invention. FIG.
41(a) is a front view of the rivet and FIG. 41(b) is a cross-section A--A
of FIG. 40(a). In this Example, the slits 4f are provided instead of the
hollow 4d in the form of a ring of the 30th Example, in order to form a
thin wall portion to be pressed and expanded in the thickness direction
thereof.
The above-mentioned rivet 4 can be used for jointing of the bonded assembly
in the same manner as in the 29th and 30th Examples, and the like effect
can be obtained.
FIGS. 42 and 43 are a front view and a bottom view respectively of the
rivet of the 32nd Example of the present invention. In this Example,
wedged projections 4g are provided on the rivet instead of the elastic
member 6 of the rivet of the 29th Example, and the like effect can be
obtained.
The number of projections 4g required may be at least one.
Also, instead of the projections 4g, rough surface may be formed by
knurling.
FIGS. 44 and 45 show the bonded assembly of the 33rd Example of the present
invention. FIG. 44 is a perspective view, and FIG. 45 is a cross-section
A--A of FIG. 44. In this Example, in order to make it easy to see the
coating position of adhesives 3 and confirm that the adhesives 3 have been
coated on the coating positions, there is provided at least one small
through hole 1h on at least one coating position of two boards 1 and 2 to
be bonded with the adhesive 3. The through hole 1h is used as a mark for
coating, and the coated conditions of the adhesives can be confirmed by
the adhesive 3a flowing out of the through hole 1h after bonding the
boards.
The adhesive used in Examples 1 to 33 of the present invention is a two
liquid type modified acrylic adhesive "HARDLOCK.RTM. M372" (available from
Denki Kagaku Kogyo Kabushiki Kaisha). Similar adhesives such as
"HARDLOCK.RTM. C372", "HARDLOCK.RTM. C355" and "HARDLOCK C370" are also
applicable.
This Example may be executed alone or in combination with each of Examples
1 to 32.
The present invention can provide a highly reliable bonded assembly, a
method of jointing therefor and rivets useful for jointing, which assure
easy and accurate alignment of boards, secure the adhesive layer thickness
required, prevent the adhesives from adhering to unnecessary portions and
increase the strength of the bonded assembly.
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