Joining hardware
The connecting metal fitting with a simplified design addresses the inefficiencies of conventional fin plate bolts by enabling easy insertion and fixation, enhancing construction efficiency and reducing part complexity.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KANAI KK
- Filing Date
- 2022-12-21
- Publication Date
- 2026-06-30
Smart Images
Figure 0007882513000001 
Figure 0007882513000002 
Figure 0007882513000003
Abstract
Description
Technical Field
[0001] The present invention relates to a connecting metal fitting for joining structural members in a wooden house.
Background Art
[0002] In a wooden house, a fin plate bolt is known as a metal fitting for joining two intersecting structural members. The fin plate bolt has a fixing plate attached to the head of the bolt shaft. The bolt at the end is inserted into one structural member, and the fixing plate is fixed to the other structural member through the bolt inserted into the other structural member on the fixing plate side. A washer and a nut are attached to the bolt at the end, and the two structural members are pulled and joined by tightening the nut (Fig. 7).
Summary of the Invention
Problems to be Solved by the Invention
[0003] Conventional fin plate bolts have low construction efficiency because the bolt at the end is inserted into one structural member and the washer and nut are attached after protruding the bolt. Also, the large number of parts is also a factor contributing to low construction efficiency.
[0004] An object of the present invention is to provide a connecting metal fitting with high construction efficiency.
Means for Solving the Problems
[0005] The connecting metal fitting of the present invention made to achieve the above object comprises a columnar shaft portion, a bolt portion formed at one end of the shaft portion, a flat fixing portion formed near the other end of the shaft portion, a flat first bent portion formed on the bolt portion side of the fixing portion, and a flat second bent portion formed between the first bent portion and the bolt portion. A plurality of screw holes are formed in the fixing portion at a predetermined interval. The widths of the first bent portion and the second bent portion may be narrower than the fixing portion. The other end of the shaft portion may be a columnar tip portion. [Effects of the Invention]
[0006] The present invention provides the following effects by means of solving the above-mentioned problems. (1) Because the connecting hardware is straight, it is easy to transport multiple pieces together. (2) Because the connecting hardware is straight, it can be easily inserted into the insertion holes of the structural members, resulting in high construction efficiency. (3) It can be fixed simply by driving in screws, resulting in high construction efficiency. [Brief explanation of the drawing]
[0007] [Figure 1] Perpendicular view of the connecting hardware of the present invention [Figure 2] Side view of the connecting hardware of the present invention [Figure 3] Perspective view of a nut with a washer [Figure 4] Diagram illustrating the usage of the connecting hardware of the present invention (1) [Figure 5] Diagram illustrating the usage of the connecting hardware of the present invention (2) [Figure 6] Diagram (3) illustrating the usage state of the connecting hardware of the present invention [Figure 7] Diagram illustrating a conventional wing bolt. [Modes for carrying out the invention]
[0008] The present invention will be described in detail below based on the embodiments shown in the figures. [Examples]
[0009] [1] Composition of connecting hardware (1) Overall structure The connecting hardware of the present invention is formed by press-forming a steel rod. The connecting hardware of the present invention consists of a shaft portion 1, a bolt portion 2 formed at the end of the shaft portion 1, a fixing portion 3 formed near the end opposite to the bolt portion 2, and a first bent portion 41 and a second bent portion 42 provided between the bolt portion 2 and the fixing portion 3 (Figures 1 and 2).
[0010] (2) Shaft portion and bolt portion The shaft portion 1 is a cylindrical steel bar, and one end is threaded to form the bolt portion 2. Also, a fixing portion 3 is formed near the end on the side opposite to the bolt portion 2, and the tip portion 11 that is the end remains cylindrical.
[0011] (3) Fixing portion The fixing portion 3 is formed by pressing the cylindrical shaft portion 1 into a flat plate shape. Since the fixing portion 3 is formed by pressing the shaft portion 1, it is wider than the shaft portion 1. Screw holes 31 are formed in the fixing portion 3 at predetermined intervals in the longitudinal direction.
[0012] (4) First bending portion and second bending portion Both the first bending portion 41 and the second bending portion 42 are formed by pressing the shaft portion 1 into a flat plate shape. The first bending portion 41 is formed on the side of the bolt portion 2 rather than the fixing portion 3. In this embodiment, it is formed continuously with the fixing portion 3, but it may be formed separately. The second bending portion 42 is formed on the side of the bolt portion 2 at a predetermined distance from the first bending portion 41. Since the first bending portion 41 and the second bending portion 42 are formed by pressing the shaft portion 1, they are easier to bend than the shaft portion 1. Also, the width may be formed narrower than the fixing portion 3 to be easier to bend than the fixing portion 3. The bonding metal of the present invention has no welding points because the fixing portion 3, the first bending portion 41, and the second bending portion 42 are formed by pressing, and the strength quality is stable.
[0013] [2] Usage state of the bonding metal Next, the bonding of the structural material using the bonding metal of the present invention will be described.
[0014] (1) Nut with washer The bonding metal of the present invention is used by engaging a washer with the bolt portion 2. The washer may be a combination of a flat square washer and a nut used for the conventional battens bolt shown in FIG. 5. However, as shown in FIG. 3, it is preferable to use a nut with a seat 5 composed of a dish-shaped seat portion 51 and a nut-shaped body portion 52, and having a blade-shaped cutting portion 53 from the back surface of the seat portion 51 to the body portion 52. The nut with a seat 5 screws the screw hole 521 of the body portion 52 onto the bolt portion 2 of the joining metal object of the present invention. Then, a bit of a rotary tool is fitted into the bit hole 511 of the seat portion 51, and the nut with a seat 5 is rotated by the rotary tool.
[0015] (2) Structural materials to be joined The structural materials 6a and 6b joined using the joining metal object of the present invention are perpendicular to each other (FIG. 4), and are, for example, a girder and a beam joined perpendicular thereto. The structural material 6a penetrates through an insertion hole 61 for inserting the joining metal object of the present invention. The insertion hole 61 is formed at a predetermined distance from the mounting surface of the structural material 6b. Since the joining metal object is inserted into the insertion hole 61, the size of the insertion hole 61 is made larger than the width of the fixing portion 3 so that the fixing portion 3 of the joining metal object can pass through.
[0016] (3) Insertion into the insertion hole The joining metal object is inserted into the insertion hole 61. At this time, the nut with a seat 5 is pre-screwed onto the bolt portion 2. The joining metal object is inserted into the insertion hole 61 from the side opposite to the structural material 6b. However, the joining metal object is linear, and the tip portion 11 to be inserted remains cylindrical without being press-processed, so it can be easily inserted into the insertion hole 61, and the construction efficiency is high. Also, since the joining metal object is linear, it is easy to carry a plurality of them together. The joining metal object only needs to be inserted into the insertion hole 61, and no parts other than the nut with a seat 5 are required, and construction at the site is easy.
[0017] (4) Fixing of the fixing portion Insert the joining metal object into the insertion hole 61, drive a screw 7 inserted through the screw hole 31 of the fixing portion 3 into the structural material 6b, and fix the fixing portion 3 to the structural material 6b. Although there is a gap between the fixing part 3 of the connecting hardware and the structural member 6b, the first bent part 41 and the second bent part 42 are easier to bend than the shaft part 1. Therefore, when the fixing part 3 is pushed toward the structural member 6b by the screw 7, it bends at the first bent part 41 and the second bent part 42, and the space between the first bent part 41 and the second bent part 42 becomes inclined, allowing the fixing part 3 to come into contact with and be fixed to the structural member 6b (Figure 5). It can be fixed simply by driving in screw 7, resulting in high installation efficiency.
[0018] (5) Tightening of structural members with washers After fixing the fixing part 3 to the structural member 6b, the nut with a seat 5 is rotated and tightened using a rotary tool. A cutting portion 53 is provided on the bottom surface of the seat portion 51 of the seated nut 5. When the seated nut 5 is tightened, the cutting portion 53 cuts into the structural material 6a, creating a counterbore. At the same time, the structural material 6b is pulled towards the structural material 6a, allowing for a strong joint (Figure 6). Furthermore, since it only requires tightening the pre-screwed nuts 5, the installation efficiency is high. [Explanation of symbols]
[0019] 1 shaft, 11 tip 2 Bolt section 3 fixed part, 31 screw holes 41 First bending part, 42 Second bending part 5 Nut with seat, 51 Seat, 511 Bit hole, 52 Body, 521 Screw hole, 53 Cutting part 6a, 6b Structural members, 61 Through hole 7 screws
Claims
1. A cylindrical shaft, A bolt portion formed at one end of the aforementioned shaft portion, A flat plate-shaped fixing portion is formed near the other end of the aforementioned shaft portion, A flat plate-shaped first bent portion is formed on the bolt portion side of the fixing portion, It consists of a flat plate-shaped second bent portion formed between the first bent portion and the bolt portion, Multiple screw holes are formed in the aforementioned fixing portion at predetermined intervals. Joining hardware.
2. The widths of the first bent portion and the second bent portion are narrower than the fixing portion, The connecting hardware according to claim 1.
3. The other end of the aforementioned shaft portion is characterized by having a cylindrical tip. The connecting hardware according to claim 1 or 2.