Metal joint

Abstract

To provide a metal joint that is high in construction efficiency and can tightly join structural materials together.SOLUTION: There is provided a metal joint that joins one structural material and the other structural material joined to the one structural material perpendicularly, and the metal joint consists of a strap body and a washer engaging one end of the strap body, wherein the strap body consists of a rod-like shaft part which is inserted into an insertion hole formed in the one structural material in parallel with the length direction of the other structural material, a bolt part formed at one end of the shaft part and engaging the washer, and a flat plate-like fixation part which can be inserted into the insertion hole by press working on the other end of the shaft part, and is formed substantially in parallel with the axis of the shaft part and fixed to a side face of the other structural material with a screw, and the washer is fitted to an entrance into the insertion hole on the surface, opposed to a joint surface of the other structural material, of the one structural material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a metal joint for joining structural members in a wooden house. [Background technology]

[0002] In wooden houses, battledore bolts are known as metal fittings used to join two intersecting structural members. A conventional battledore bolt has a fixing plate attached to the head of the bolt shaft. The end bolt is inserted into one structural material, and the fixing plate is fixed to the other structural material via a bolt (kanzashi bolt) and nut inserted into the other structural material on the fixing plate side. A washer and nut are attached to the end bolt, and the two structural materials are pulled together and joined by tightening the nut (Figure 7).

[0003] With conventional battledore bolts, the bolt at the end is inserted into one of the structural materials to make the bolt protrude, and then the fixed plate is fixed with a bar bolt and nut, and a washer and nut are attached to the protruding bolt, which requires a large number of parts and makes installation inefficient. For this reason, the Hagoita bolt described in Patent Document 1 is an improvement over the conventional Hagoita bolt, with improved installation efficiency.

[0004] The battledore bolt described in Patent Document 1 has a screw hole formed in the fixing part and is fixed to one of the structural materials with a screw, so there is no need to make a kanzashi bolt and a hole for the kanzashi bolt, the fixing position can be freely selected, and installation efficiency is high. Also, instead of a washer, a flat washer part is formed integrally by pressing at the end side of the shaft part. This reduces the number of parts and increases installation efficiency. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-87414 Summary of the Invention [Problem to be solved by the invention]

[0006] The battledore bolt described in Patent Document 1 has an integrally formed washer, so during installation it is necessary to fasten the fixing part with a screw while the washer is engaged with one of the structural members and pulled in. If the pulling is insufficient at this time, the joining strength between the structural members will be weak. Also, although a hole for the hairpin bolt is not required, a seat groove is required to accommodate the washer part.

[0007] An object of the present invention is to provide a metal joint that has high construction efficiency and can firmly join structural materials together. [Means for solving the problem]

[0008] The joining hardware of the present invention, which has been made to achieve the above-mentioned object, is joining hardware that joins one structural material to another structural material that is joined perpendicularly to the one structural material, and is composed of a battledore body and a washer that engages with one end of the battledore body, and the battledore body comprises a rod-shaped shaft portion that is inserted into a through hole provided in the one structural material parallel to the longitudinal direction of the other structural material, a bolt portion formed on one end of the shaft portion and that engages with the washer, and a flat fixing portion that is formed by pressing the other end of the shaft portion and can be inserted into the through hole, is formed approximately parallel to the axis of the shaft portion, and is fixed to the side of the other structural material with a screw, and is characterized in that the washer fits into the entrance of the through hole on the surface of the one structural material that faces the joining surface of the other structural material. The washer may be a nut with a washer that is screwed onto the bolt portion. The bolt portion may have a groove formed therein, extending from the one end to a predetermined position in the circumferential direction. [Effects of the Invention]

[0009] The present invention provides the following effects by solving the above-mentioned problems. (1) Unlike conventional battledore bolts, there is no need to install a kanzashi bolt or a hole for the kanzashi bolt, so the fixing position can be freely selected, and installation efficiency is high. (2) If tightening the washer does not sufficiently draw the structural materials together, the joining strength between the structural materials will be weak. (3) There is no need to excavate a seat to accommodate the washer, which increases construction efficiency. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a metal joint according to the present invention; [Figure 2] An explanatory diagram of the use of the metal joint of the present invention (1) [Figure 3] A side view of the metal joint of the present invention. [Figure 4] Perspective view of washer nut [Figure 5] An explanatory diagram of the use of the metal joint of the present invention (2) [Figure 6] An explanatory diagram of the use of the metal joint of the present invention (3) [Figure 7] Explanatory diagram of a conventional battledore bolt DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described in detail below based on the embodiments shown in the drawings. [Example]

[0012] [1] Composition of metal joints (1) Overall structure The metal joint of the present invention comprises a battledore body 1 formed by pressing a steel rod, and a washer 2 (Fig. 1).

[0013] (2) The battledore itself The battledore body 1 comprises a shaft portion 11, a bolt portion 12 formed at the end of the shaft portion 11, and a fixing portion 13 formed near the end opposite to the bolt portion 12.

[0014] (3) Shaft and bolt The shaft portion 11 is a cylindrical steel rod, and one end is threaded to form the bolt portion 12. The shaft portion 11 is bent near the center in the axial direction, and the fixing portion 13 side is inclined relative to the bolt portion 12 side to form an inclined portion 111.

[0015] (4) Fixed part The fixing portion 13 is formed into a flat plate by pressing the cylindrical shaft portion 11. The fixing portion 13 is formed so as to be parallel to the axial direction of the shaft portion 11, not the inclined portion 111. The fixing portion 13 has a screw hole 131, and is fixed to the structural material 4b by a screw 3 inserted into the screw hole 131 (FIG. 2).

[0016] (4.1) Distance between shaft and fixed plate The shaft portion 11 has an inclined portion 111 on the side of the fixed portion 13 . Therefore, a gap d is provided between the axis of the shaft portion 11 on the bolt portion 12 side and the lower surface of the fixing portion 13 (FIG. 3).

[0017] (5) Washer The washer 2 may be a combination of a flat square washer and a nut used in the conventional battledore bolt of Figure 7, but it is preferable to use a seat nut as shown in Figure 4, which consists of a dish-shaped seat portion 21 and a nut-shaped body portion 22 and has a blade-shaped cutting portion 23 extending from the back surface of the seat portion 21 to the body portion 22. The washer 2 has a screw hole 221 in the body 22 that is screwed onto the bolt portion 12 of the battledore body 1. Then, a bit of a rotary tool is fitted into the bit hole 211 in the seat portion 21, and the washer 2 is rotated by the rotary tool.

[0018] [2] Use of metal joints Next, the joining of structural materials using the metal joint of the present invention will be described.

[0019] (1) Structural materials to be joined The structural members 4a and 4b joined using the metal joint of the present invention are orthogonal to each other (Fig. 2), for example, a girder and a beam joined perpendicularly to it. The structural material 4a is provided with an insertion hole 41 for inserting the metal joint of the present invention. The insertion hole 41 is formed at a distance d from the fixing surface of the structural material 4b that fixes the fixing part 13 (Fig. 3). In addition, because the washer 2 is a seat nut with a cutting part 23, there is no need to countersink the entrance of the insertion hole 41 on the surface of the structural material 4a that faces the joining surface with the structural material 4b. The battledore body 1 is inserted into the insertion hole 41, but since the battledore body 1 has an inclined portion 111, a fixed portion 13, and an axial portion 11, the size of the insertion hole 41 is made larger in diameter than the width of the fixed portion 13 so that the inclined portion 111, the fixed portion 13, and the axial portion 11 of the battledore body 1 can pass through (Figures 5(a) and (b)).

[0020] (2) Insertion into the insertion hole The battledore body 1 is inserted into the insertion hole 41. At this time, the washer 2 is screwed onto the bolt portion 12 in advance. If a groove 121 is formed in the bolt portion 12 from the end to a predetermined position (for example, about two threads of the bolt portion 12) in the circumferential direction, and the washer 2 is screwed up to the position of the groove 121, the washer 2 will not fall off when the battledore body 1 is inserted. The battledore body 1 is inserted into the insertion hole 41 from the side opposite to the structural material 4b. The battledore body 1 is simply inserted into the insertion hole 41, and no parts other than the battledore body 1 and the washer 2 are required, reducing the number of parts and increasing the efficiency of construction.

[0021] (3) Fixing the fixed part The battledore body 1 is inserted into the insertion hole 41, and the screw 3 inserted into the screw hole 131 of the fixing part 13 is driven into the structural material 4b, thereby fixing the fixing part 13 to the structural material 4b (Fig. 6). Unlike conventional battledore bolts, there is no need to construct a hairpin bolt and a hole for the hairpin bolt, and the screw 3 can be fixed simply by driving it into the structural material 4b, so the fixing position can be freely selected and construction efficiency is high.

[0022] (4) Pulling structural materials together with washers After the fixing portion 13 is fixed to the structural member 4b, the washer 2 is rotated and tightened by a rotary tool. Washer 2 is a nut with a seat, and a cutting portion 23 is provided on the bottom surface of seat portion 21. Therefore, by tightening washer 2, structural material 4a is cut by cutting portion 23 to create a seat, and at the same time structural material 4b is pulled toward structural material 4a, resulting in a strong joint (Figure 3). Furthermore, since the washer 2 that has been screwed in beforehand is simply tightened, the construction efficiency is high. [Explanation of symbols]

[0023] 1 Battledore body, 11 Shaft, 111 Inclined portion, 12 Bolt portion, 121 Groove, 13 Fixing portion, 131 Screw hole 2 washer, 21 seat portion, 22 body portion, 221 screw hole, 23 cutting portion 3 bis 4 Structural material, 41 Insertion hole

Claims

1. A metal joint that joins one structural member and another structural member that is joined perpendicularly to the one structural member, The joining metal comprises a battledore body and a washer that engages with one end of the battledore body, The battledore body is a rod-shaped shaft portion that is inserted into an insertion hole that is provided in the one structural member and that is parallel to the longitudinal direction of the other structural member; a bolt portion formed at one end of the shaft portion and engaging with the washer; a flat-plate-shaped fixing portion formed by pressing the other end of the shaft portion, capable of being inserted into the insertion hole, formed substantially parallel to the axis of the shaft portion, and fixed to a side surface of the other structural material with a screw; A metal joint, characterized in that the washer is fitted into the entrance of the insertion hole on the surface of one of the structural materials opposite the joining surface of the other structural material.

2. The washer is a nut with a washer that is screwed onto the bolt portion. The metal joint according to claim 1.

3. The bolt portion is characterized in that a groove is formed in the circumferential direction from the one end to a predetermined position. The metal joint according to claim 2.

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