JPH0620008U - Joint structure for wood products - Google Patents

Abstract

(57) [Summary] [Purpose] A directional woodworking member such as a leg member can be easily and accurately positioned and joined to another woodworking member such as a top plate, and even if an external force is applied after joining, the legs The object of the present invention is to provide a joint structure for woodworking products, in which the angle of is kept firmly fixed and the connection between both woodworking members is not loosened. A shaft body (2) having a ring groove in which at least one side is a tapered surface (23) is planted with a front half portion (2a) so that a rear half portion projects from a surface of a first member (1A) of two members to be spliced, A second member 1B having a blind hole 103 into which the latter half 2b of the shaft body 2 is inserted, and having a push screw 3 which can be advanced in a position crossing the blind hole 103 at a portion corresponding to the ring groove; At the portion displaced from the body 2, half is embedded in the first member or the second member,
The remaining half has a pin 4 inserted into a blind hole formed in the second member or the first member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a joint structure for a woodworking product represented by, for example, a wooden top plate and leg members.

[0002]

[Prior art and its technical problem]

 In many woodworking products such as tables with wooden legs, kotatsu, and table, the cross-sectional shape of the leg members is often polygonal, oval, oval, or gourd-shaped due to design considerations. It is common for these parts to be transported in disassembled condition and assembled by furniture stores and users. As a joint structure in such a case, the present inventor has proposed a push-screw type structure in Japanese Utility Model Laid-Open No. 3-129405. In this prior art, one half of the shaft body is embedded in one woodworking member to be spliced, and a ring groove with a tapered surface on one side is provided in the remaining protruding half part of the shaft body, and Part is inserted into the bag hole formed on the other woodworking member, and the set screw is screwed in so that it crosses the bag hole at the part corresponding to the ring groove. The structure was such that the shaft body is pulled and the reaction force pulls both woodworking members together.

This prior art is able to easily splice two woodwork products. However, when the leg members are joined to the top plate, the accuracy is poor because the operation of aligning the leg members in the circumferential direction so as to match the cross-sectional shape is visual only. When the push screw is operated in close proximity to the leg member, if the leg member is touched or vibration is applied, the leg member is misaligned, and the leg member is likely to be spliced in the wrong direction. Moreover, since the leg member and the shaft body can relatively rotate due to the applied force even after the connection, there is a problem that the leg member is displaced in the circumferential direction. Furthermore, the relative rotation causes the push screw to slide on the taper surface, giving a rotational moment on the slack side, which causes slackness in combination with vibrations applied during use as furniture, causing the leg member and top plate to loosen. There was a problem that there was a gap in the back and rattling.

The present invention was devised in order to solve the above-mentioned problems, and its purpose is to simplify a directional woodworking member such as a leg member to another woodworking member such as a top plate. Positioning joints can be made simply with high accuracy, and even if external forces are applied after the joints are made, the leg angles remain firmly fixed, and a joint structure for woodworking products that does not loosen the connection between both woodworking members is created. To provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a shaft formed with a ring groove in which at least one side is tapered while being planted with the front half so that the rear half protrudes from the surface of the first member of the two members to be spliced. A body, a second member having a bag hole into which the latter half of the shaft body is inserted, and a push screw that can be advanced in a position corresponding to the ring groove so as to cross the bag hole, and the shaft body. And a half of the displaced part is embedded in the first member or the second member, and the remaining half is a pin to be inserted into the bag hole formed in the second member or the first member. Is. The half of the pin may be embedded with a screw or a press fit. The front half of the shaft portion may be directly screwed into the wood, or may be fixed by press fitting or driving, or a plate-like mounting member may be fixed to the surface of the first member, and You may screw in the provided nut. In this case, it is preferable to attach the pin to the mounting bracket. In the present invention, the front half, the rear half, and the half do not mean half the length.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment of a joint structure for woodworking products according to the present invention. 1A is the first member of the woodworking product to be spliced, which is a top plate or frame plate in this embodiment. 1B is the second member of the woodworking product to be spliced. In this embodiment, it is a leg member and has a hexagonal cross section in FIGS. 1 and 2 and a quadrangular cross section in FIGS. 3 and 4. Reference numeral 2 denotes a connecting shaft body, in which the front half portion 2a is embedded and fixed in the first member 1A, and the rear half portion 2b is inserted in the second member. A push screw 3 is attached to the second member 1B and is for forcibly pulling the shaft body 2 toward the second member side to bring the first member 1A and the second member 1B into close contact with each other. Reference numeral 4 is a pin for stopping the rotation of the second member 1B in the circumferential direction and for preventing the loosening of the first member 1A and the second member 1B. At the portion displaced from the shaft body 2, each half is a first member 1A. And passed to the second member 1B. Reference numeral 5 denotes a mounting member for fixing the front half portion 2a of the shaft body 2, which is fixed to the lower surface side of the first member 1A.

First, the mounting member 5 has a nut 4a integrally or integrally provided on a plate body, a screw hole is provided in the peripheral portion, and a female screw hole 50 for mounting the pin 4 is formed. Has been done. Although the female screw hole 50 is provided at one place in this example, it may be provided at a plurality of places. The mounting member 5 is arranged in a counterbore hole 100 provided on the lower surface of the first member 1A, and is fixed by a screw 5a or additionally using an adhesive. The counterbore hole 100 is provided with a shaft hole 101 coaxially with the nut 4a, and if necessary, is provided with a female thread hole 50 and a small-diameter blind hole 102 on the same axis as the pin 4 to allow insertion of the pin 4.

On the other hand, the second member 1B has a blind hole 103 formed coaxially with the nut from the upper end. The blind hole 103 has a depth equal to or greater than the length of the second half 2b of the shaft body 2 and a diameter substantially equal to the diameter of the second half 2b. Further, a cross hole 104 is formed so as to intersect with the bag hole 103. The cross hole 104 is provided in a portion that is difficult to see from the outside when the target furniture is completely assembled. Then, in advance, a predetermined position on the surface of the second member 1B, that is, the second member 1B has a predetermined orientation with respect to the first member 1A when the joining is completed, for example, one surface 10b of the second member 1B in FIGS. Finely position it so that it is positioned parallel to the slanted corner 10a of the first member 1A, and that in FIGS. 3 and 4 the two faces of the second member 1B are positioned parallel to the edges of the first member 1A. A blind hole 105 is provided. The small-diameter bag hole 105 is a key that is set to a predetermined depth with a dimension smaller than the length L of the pin 4.

In this example, the front half portion 2a of the shaft body 2 has a mechanical screw as a fixing mechanism, and the rear half portion 2b has a shaft portion 21 having a diameter substantially the same as the bag hole 103, a thin shaft portion 22, and a thin shaft portion 22. It has a tapered surface (which may have an appropriate curvature) 23 that expands from the end of the shaft portion, and a shaft-shaped head portion 24, and a table is provided between the tapered surface 23 and the end surface of the shaft portion. A ring groove having a shape or a similar shape is formed. The shank end face need not be at right angles to the thin shank and may have a gentle taper. Friction coefficient increasing portions are engraved on the outer peripheral surfaces of the shaft portion 21 and the head portion 24 to prevent rotation. Further, a tool engagement hole 25 for embedding the front half 2a of the shaft is provided on the end face of the head 24.

The push screw 3 is arranged on the second member 2B so that the screw axis is biased toward the center of the ring groove or slightly toward the tapered surface in the state where the second member 2B is aligned with the first member 2A. Preferably. The push screw 3 has an operating portion 30 including a square hole, a screw portion 31, and a tapered rod tip 32. The push screw 3 may be directly screwed into the cross hole 104, but in this embodiment, the insert nut 6 is press-fitted into the cross hole 104 and is screwed into the female screw of the insert nut 6. In this first embodiment, the pin 4 has a mechanical screw 40 at least on the outer periphery of at least half thereof, and the mechanical screw 40 is detachably screwed into the female screw hole 50 of the mounting member 5 by the tool engaging portion 41 at one end. Has been. The remaining half of the pin 4 may not be provided with a mechanical screw, and the cross-sectional shape perpendicular to the axis need not be circular. In some cases, the pin 4 may be integrally formed as a protrusion on the mounting member 5, but since the protrusion protrudes from the surface of the first member 1A, it is possible to stack the first member 1A on top of each other. There is a disadvantage that you cannot do it.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the mounting member 5 is not used, and the front half portion 2a of the shaft body 2 is embedded and fixed directly in the first member 1A. Therefore, the first member 1A is provided with a shaft hole 106 instead of the counterbore hole, and the front half portion 2a as a fixing mechanism is embedded and fixed in the shaft hole 106. The fixing mechanism is a wood screw portion (including a multi-thread screw) in this example. A small-diameter blind hole 102 is formed at a position separated from the shaft hole 106. In this embodiment, the pin 4 has a wood screw portion 42 in one half, and is attached to the small-diameter bag hole 102 of the first member 1A by the tool engaging portion 41 provided at the end of the remaining half 43. . Since the other structure is the same as that of the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

FIG. 6 shows a third embodiment of the present invention. In this embodiment, the pin 4 has a biting protrusion 44 in a half portion thereof, and the pin 4 is press-fitted and fixed in a small-diameter bag hole 105 provided in the second member 1B. Instead of this, as in the second embodiment, it is possible to embed a biting protrusion 44 on the side of the first member 1A so as to project the half portion 43 downward. The method of embedding and fixing the shaft body 2 is not limited, and a driving insert portion having saw teeth on the outer periphery may be used instead of the wood screw, or a fitting corresponding to the insert nut of the push screw 3 may be used as the first member. It may be embedded in 1A and the mechanical screw of the shaft body 2 may be screwed into the insert nut. Further, in any of the embodiments, the front half portion 2A of the shaft body 2 may be fixed by using an adhesive together. The method of fixing the mounting member 5 is not limited, and screwing may be used together with adhesion. Further, although one pin 4 is used in the second and third embodiments, it goes without saying that a plurality of pins may be used.

[0013]

[Operation of the embodiment]

 In the first embodiment, the mounting bracket 5 is fixed to the first member 1A in advance, and when the furniture store or the user assembles it as a table with legs, a table or a kotatsu, as shown in FIG. The tool T is arranged on the engaging portion 25 provided on the shaft head portion 24 to give a rotational torque. As a result, the mechanical screw provided on the front half portion 2a of the shaft is screwed into the nut 4a of the mounting bracket 5, and the rear half portion 2b is set to project from the first member 1A by a predetermined length. Next, the tool T ′ is placed on the engaging portion 41 of the pin 4 and screwed into the female screw hole 50 of the mounting fixture 5. The protruding length of the pin 4 can be freely adjusted.

Next, as shown in FIG. 8, the second member 1B is brought close to the first member 1A, the shaft body rear half 2b protruding from the first member 1A is inserted into the blind hole 103, and the half of the pin 4 is formed. Are fitted into the small-diameter bag holes 105, respectively. The position of the small-diameter bag hole 105 is arranged so that the surface with the second member 1B is positioned in a predetermined direction with respect to the first member 1A when the joining is completed, and therefore the second member is automatically operated by the above operation. 1B is positioned in the circumferential direction. Then, in this state, as shown in FIG. 9, the tool T is engaged with the operation portion 30 of the push screw 3 to rotate. As a result, the push screw 3 advances toward the ring groove, but one side of the ring groove is a right angle or a similar angle, but the one side has a tapered surface 23. The tip 32 contacts the tapered surface 23, and the head portion 24 is strongly pressed downward in FIG. 9 by the wedge action. Since the front half portion 2a of the shaft body 2 is embedded and fixed in the first member 1A as described above and does not move in the axial direction, the second member 1B and the first member 1A are pulled together as the push screw 3 advances. The second half portion 2b of the shaft body is deeply fitted in the bag hole 103, and the pin 4 is also deeply inserted into the small diameter bag hole 105. There is no need to hit the first member 1A or the second member 1B or to apply an axial compressive force, and it is not necessary to adjust the orientation of the second member 1B, so the work is easy and the work can be performed efficiently. .

As described above, a strong pulling force is applied to the shaft body 2 and the reaction force thereof causes the second member 1B to come into close contact with the first member 1A, so that the shaft member 2 is firmly connected. Further, since the half portion of the pin 4 is inserted into the small-diameter bag hole 105, even if an external force is applied to the second member 1B during the tightening operation, the second member 1B does not rotate around the shaft body 2, The second member 1B does not shift in the circumferential direction due to the action of the pin 4 even if the second member 1B is brought into close contact with the first member 1A while being accurately kept in the set direction and external force acts after assembly. Even if the pins 4 loosen from the fittings 5 due to various vibrations while the obtained furniture is being used, the small-diameter bag hole 105 of the second member 1B has a bottom. When No. 4 reaches the bottom of the small-diameter bag hole 105, it does not come out further. Therefore, the rotation stopping action of the pin 4 is permanent and the relative rotation between the first member 1A and the second member 1B and between the second member 1B and the shaft body 2 is prevented. Therefore, the taper bar tip 32 of the push screw 3 and the taper surface 23 do not slide, and the loosening of the push screw 3 due to the sliding is prevented, so that the tensile force of the shaft body 2 changes. Does not occur. Therefore, the first member 1A and the second member 1B can be reliably and firmly connected to each other for a long period of time.

In the second and third embodiments, the front half portion 2a of the shaft body 2 is embedded in the first member 1A, and the wood screw 42 is used in the second embodiment, and the bite is used in the third embodiment. The half of the pin 4 is embedded by the ridge 44. The subsequent operation is the same as in the first embodiment. The first embodiment has the advantages that the operation of embedding the front half portion of the shaft body 2 is easier and the protrusion length of the pin 4 is easier to adjust than these embodiments. The present invention is effective for joining members in a cross relationship such as a top plate or frame and leg members, and can also be applied to joining two members in series like a railing. .

[0017]

[Effect of device]

 According to the present invention described above, a directional woodworking member such as a leg member can be easily and accurately positioned and joined to another woodworking member such as a top plate, and even if an external force is applied after joining, The angle of is kept firmly fixed, and the excellent effect that the connection of both woodworking members is not loosened is obtained.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of a joint structure for woodworking products according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged view of a first embodiment of a joint structure for woodworking products according to the present invention.

FIG. 4 is a sectional view taken along line XX of FIG.

FIG. 5 is a sectional view showing a second embodiment of the present invention.

FIG. 6 is a sectional view showing a third embodiment of the present invention.

FIG. 7 is a sectional view showing a first stage of assembly in the present invention.

FIG. 8 is a sectional view of a second stage.

FIG. 9 is a sectional view of a third stage.

[Explanation of symbols]

 1A 1st member 1B 2nd member 2 Shaft body 2a 1st half part 2b 2nd half part 3 Push screw 4 pin 5 Mounting bracket 23 Tapered surface 103 Bag hole 105 Small diameter bag hole

Claims (3)

[Scope of utility model registration request] 1. A shaft body 2 having a ring groove formed with a front half portion 2a so that a rear half portion thereof projects from the surface of a first member 1A of two members to be spliced, and a ring groove having a tapered surface 23 on at least one surface is formed on the way. And a second member 1B having a blind hole 103 into which the latter half 2b of the shaft body 2 is inserted, and having a push screw 3 attached to a position corresponding to the ring groove so as to be capable of advancing in a crossing relationship with the blind hole 103, A half part is embedded in the first member or the second member at a position displaced from the shaft body 2, and the remaining half part is provided with a pin 4 inserted into a bag hole formed in the second member or the first member. This is a joint structure for woodworking products. 2. A mounting member 5 is fixed to the surface side of the first member, and a front half portion 2a of the shaft body 2 is screwed to the mounting member 5 and a half portion of the pin 4 is mounted. The joint structure for a woodworking product according to claim 1, which comprises. 3. The pin 4 has a first member 1A or a second member 1B.
The joint structure for a woodworking product according to claim 1, including one directly embedded in the joint.