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1. Akira, book 1, name of invention]
Coupling device
3, Detailed Description of the Invention] The present invention relates to a joining device for
joining two solid pieces, in particular to a novel joining device that can be economically
produced, reliably and promptly combining two parts by weight . The coupling device of the
present invention is particularly effective for forming a coupling between members in EndPage: 1
cabinet of a loudspeaker. One way to combine wooden parts is to strike a wedge that absorbs
moisture in a vertically tapered mouth and expands while using a glue, but if you dry the glue,
you can not remove it anymore , Binding can not be done quickly, it takes time and cost is also
disadvantageous. In view of the foregoing, it is an object of the present invention to provide a
bonding apparatus which has a reliable bonding force and does not need to use a glue or the like
in combination, can be applied between members or parts of various materials, And to provide an
apparatus therefor. To outline the device of the present invention, one of the solid material or
member to be bonded is provided with a protrusion with a groove. A slot having a dove foot
cross section is drilled in the other member to be coupled, that is, the second member, and the
narrowed opening width of the slot, that is, the slot outer end width is larger than that of the first
member Make it almost the same as the width of the part. A wedge made of a hard material such
as metal, plastic or the like is provided with a check-like ridge so that the bottom surface of the
wedge is placed on the bottom of the slot so that the top of the wedge faces the slot opening,
Make sure that the side faces toward both side walls of the slot. Desirably, the wedge is drilled
with a slot which is open toward the bottom of the slot and has a substantially triangular cross
section. In assembly, a first member having a grooved projection is pushed such that the
projection enters into the slot of the second member, forcing the wedge into the groove in the
projection. By doing so, the wedge expands the groove of the protrusion and the raised portion of
the wedge engages the groove wall, keeping both side walls of the protrusion in abutment with
the side wall of the dove's foot-like slot, In particular, it is possible to achieve a mechanical and
reliable permanent coupling, in which the width return of the protrusion groove is eliminated
without requiring a glue or the like to lock the protrusion in the slot. In addition, if necessary, it is
an arbitrary problem that glue or other appropriate means may be put in advance in the slot and
the function of fluid seal at the joint part may be combined. DETAILED DESCRIPTION OF THE
PREFERRED EMBODIMENTS In the following, referring to the embodiment of the invention
shown in the drawings, firstly as shown in the cross section of FIG. 1, a solid member such as
wood, plastic, metal and other members 11 is provided with a tongue- A protrusion 12 is
A second member 13, likewise made of wood, metal, plastics or other solid material, is provided
with a slot or slot 14 having an angled side wall surface, from the open end of the slot 14 to the
outside The width of the rail is narrower than the width of the bottom surface and slightly wider
than the width of the projecting portion 12, so that the cross section of the slot has a tapered
shape. The wedge 15 having a protuberance or protrusion is formed with a groove 21 which is
substantially triangular in cross section and opened toward the bottom surface of the slot 14 and
the wedge is placed on the bottom surface of the slot and its top portion faces the groove 16 of
the protruding portion 12 Both side walls on which the protuberance is provided are made to be
brought into contact with both side wall surfaces of the slot 14. The width of the top portion of
the wedge is narrower than the width of the groove 16 of the protruding portion, and the width
of a portion of the protuberance 17 is wider than the width of the groove 16. FIG. 2 shows a
cross section in a state where the above-mentioned members are perfectly coupled to each other.
However, if both members 11.1i are pushed relative to each other as a process progresses to that
point, protrusions The portion 12 enters into the slot 14 and the wedge 15 enters the groove 16
of the protruding portion 12, respectively. Eventually, the wedge 15 expands the groove 16, so
that both side walls of the protruding portion 12 come into contact with both side wall surfaces
of the slot 14. At this time, the raised portion, the projecting portion or the jaw portion 17 of the
wedge 15 helps to widen the grooves 1 and 6 while engaging so as to bite into the wall surface
defining the groove 16 of the projecting portion 12 , While ultimately serving to lock the
protrusion 12 into the slot 14. The wedge 15 is shown in a perspective view in FIG. 3. Providing
the groove 21 having a triangular cross section ensures the widening of the wedge itself to
guarantee the spreading of the protrusion 12 to the both side wall surfaces of the slot 14 and to
move the protrusion 1 a in the pulling out direction so that the side walls But it also substantially
reduces its withdrawal pressure when it receives resistance. In addition, looseness of both
members after joining can be corrected. At the time of molding the wedge 15, it is desirable that
the angle formed by both side walls of the groove 21 is larger than the angle formed by both side
walls of the slot 14 by about 2 ° to 5 °, and EndPage: 2, in this way, It is possible to sufficiently
bite into the wall surface of the protruding portion groove 1 - 6 of the portion 17. Incidentally,
the angle formed by the both side wall surfaces of the slot 14 is preferably about 14 °, for
example, and the height of the slot 21 is preferably about 70% of that of the wedge 15. The
length of the wedge 15 may be any length. If necessary, it may be filled in the adhesive agent or
the groove agent groove 16 and / or the slot 14 such as a glue to exhibit the fluid draw ability
and / or enhance the bonding function.
The wedge 15 may be made of a suitable material such as metal or plastic, but preferably it
should have at least about the same stiffness as both members 11.13 to be joined. The reason for
this is that if such a material is chosen, the raised portion 17 can bite into the side walls of the
groove 16 as deforming. The wedge 15 may be provided along the entire length or partial length
of the slot 14 and the protrusion 12 in the longitudinal direction, but a plurality of short wedges
15 having a short length in the longitudinal direction may be provided. In the apparatus of the
present invention, the permanent coupling is conveniently brought about, the mounting jig or
other equipment is not required, and the coupling is advantageous both quickly and
economically. Of course, various angular connections between the various members are possible.
Considering the use of the present invention, it can be used as a highly versatile example for
joining wooden parts of a cabinet of a loudspeaker. The actual size of what this applicant used for
this type of joining will be exemplified by reference. A plywood plate of about 3.4 crn (3 / -4
inches) thick is a member to be coupled, the width of the protrusion 12 is about 84 tone (03
pints), the width of the groove 16 is about 32 pounds (0, 125 inches ), The height of the
projecting part is about 87 (11/32 inch), the depth of the groove 16 is about 6.0 m (8/32 a: yf),
the depth of the slot 14 is about 9.9 tang (0, 39 inch) , The width of the opening end is about 9.6
fi (0, 38 in ≠), the bottom width is about 13 cm (0, 50 inch bottom width of the man wedge
about 4.3 tm (0, 1 finch) It is 8 m + (, 0, 23 inch),. As described above in detail, the present
invention is effective for providing a novel coupling device capable of coupling two solid
members at a high speed and economically sufficient stability and permanence, and the present
invention Various modifications according to the idea of
the present invention will not be taken
as examples but also in this application.
4, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing an
embodiment of the coupling device of the present invention in a state before coupling, FIG. 2 a
side sectional view similarly showing the state after coupling is completed, Is a partially broken
perspective view of wedge means used in the coupling device of FIG. In the figure 11.13 are the
two members to be joined, 12 the protrusion, 14 the slot, 15 the wedge and 17 the raised part of
the wedge. Patent applicant Pose corporation attorney attorney Kozo Yuasa ·,. Attorney Attorney
Mitsuya Ikenaga -1 EndPage: 3
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description, jps5330318
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