JPH0125125Y2 - - Google Patents

Description

[Detailed Description of the Invention] The invention of the present application relates to a connection reinforcing hardware suitable for connections such as T-shaped joints or braced flints in the frame construction method of wooden buildings.

Conventionally, when reinforcing the above-mentioned T-shaped joints, etc., the beam members and girder members arranged in a T-shape were extended to the washer part using a connecting reinforcing metal fitting called a hagoita. Insert the set connecting bolt from the inside of the girder member and tighten it with a nut to the threaded part that protrudes to the outside of the girder member. At the same time, insert the tightening bolt into the washer part where the bolt extends from the washer part side beforehand. It is widely known that a tightening bolt is inserted into a bolt hole provided in a beam member and a nut is used to tighten it in a T-shape to a beam member and a girder member.

However, in the above-mentioned reinforcing hardware called (battleboard), the connecting bolts to the girder members are integrally extended to the washers by welding, etc., so they are long and inconvenient to handle. The connecting bolt with this girder member is inserted into the girder member from the inside of the girder member and tightened with a nut at the threaded end that protrudes to the outside of the girder member, so that the tail end of the connecting bolt is attached to the outside of the girder member. It protrudes unnecessarily, causing inconvenience in finishing the exterior wall, etc., and it becomes necessary to cut off the protruding end.

In addition, in conventional (Hagoita), when tightening the tightening bolt that is inserted into the beam member, the bolt shaft rotates as the tightening nut rotates, so the bolt head and tightening It is necessary to tighten the nut using two wrenches on both sides, and therefore, the tightening operation using both hands when working at heights has the disadvantage of being dangerous.

Furthermore, even if the nuts of the above-mentioned known (battleboard) are tightened strongly, over a long period of time, the wood will dry out and become thinner, and the nuts may become loose due to vibrations and the like, causing the connection to deteriorate or the nuts to fall off. In this way, it is difficult to achieve the purpose of reinforcing connections such as T-shaped joints.

In view of the above, the inventor of the present application has completed the present invention as a result of research.

Therefore, the invention of the present application can overcome and eliminate the drawbacks of the above-mentioned known connection reinforcing metal fittings.
By providing connection reinforcement hardware that can be used as connection reinforcement hardware for squared joints, etc., as well as for adjusting the angle of even corners between members arranged in a T-shape such as braces, flints, etc., and contributing to reinforcement and stability. be.

Furthermore, another object of the present invention is to provide a connection reinforcement hardware that can prevent the nut from unnecessarily loosening or falling off after the nut is screwed onto the threaded portion.

The configuration of the present invention will be described as follows with reference to the accompanying drawings showing embodiments.

As shown in Figures 3 and 4 of the attached drawings, the head side 4 of a bolt 3 having a threaded portion 2 on the shaft portion 1 is expanded into an even polygonal shape with 4 to 8 sides in the axial direction and in a direction perpendicular to the axis. A screw hole 6 having an appropriate outer diameter is inserted between a specific surface protruding perpendicularly to the axial direction of the head 5 and a surface corresponding to the specific surface along the longitudinal axis of the shaft. It has a structure in which the threads are carved in a direction perpendicular to the direction.

Incidentally, a (+) or (-) concave groove 7 for a screwdriver can be carved on the end face of the head, if necessary.

Practically speaking, it is generally desirable that the bulge formed on the head side include a bulge having a radius of 1/2 of the screw hole 6 at least at the outer edge of the screw hole 6.

In the above configuration, a square or round plate-shaped washer part 8 is formed at the base of the bulge part and the bolt part as necessary.
It can also be formed integrally with the bulged head 5. (FIG. 4) Alternatively, as shown in FIGS. 6 and 7, the bulged head 5 may have a circular or circular shape, and the screw holes 6 may be threaded.

Next, instead of threading the screw hole 6 in a direction perpendicular to the longitudinal direction of the shaft, as another embodiment, as shown in FIG. (Practically speaking, 45 mm in the longitudinal direction of the shaft.)
It is also possible to have a threaded configuration (in the direction of degrees).

Furthermore, as shown in FIG. 8, the tail end of the shaft 1 is provided with a threaded part 2'' formed at an acute angle, a screw hole 6 is threaded in the head 5, and a screwdriver is provided on the end surface of the head. A configuration in which a (+) or (-) shaped groove 7 is carved is also possible.

Furthermore, as another example, as shown in FIG.
For example, after a nut is screwed onto a threaded portion by immersing or spraying a thin film of adhesive such as silicone rubber, epoxy resin, or polyurethane adhesive, the nut may rotate unnecessarily and become loose. It is also possible to adopt a structure that prevents this from occurring or falling off.

In this case, it is practically desirable that the end of the threaded portion is not coated with a thin film in order to facilitate the initial tightening of the nut.

Note that the threaded portion of not only the special bolt according to the present invention but also a known bolt or screw may be coated with a thin film of adhesive.

Since the invention of the present application has the above-mentioned configuration, when it is constructed as a connecting fitting between the beam member 10 and the girder member 11 arranged in a T-shape in a T-shaped joint etc. in a wooden building, the beam is provided with bolt holes in advance. Prior to arranging the members 10 in a T-shape on the beam member 11, the bolt 3 according to the present invention is inserted into the bolt hole of the beam member 10, and the beam member with the nut 12 temporarily screwed into the threaded portion 6 is inserted into the beam member 11. After placing it in the desired position, connect the connecting bolt 1
3 is inserted from the outside of the girder member 11, and the head 5 of the bolt 3 is temporarily screwed into the beam member 10 along the beam member 10.
Facing the screw hole 6 part, connect the screw hole 6 with the connecting bolt 13
After fixing it so that it matches the axial direction of the connecting bolt 13, the head of the connecting bolt 13 is rotated and screwed using a wrench, and the bolt 3 inserted through the beam member 10 is tightened with the nut 12. bolt 13
and the tightening bolt 3 are fixed to each other, and the connection between the beam member 10 and the girder member 11 arranged in a T-shape can be strengthened.

Therefore, the work is simple and labor-saving, and work at high places is easy and safe.

Next, in the second embodiment of the present invention, the bulging head is diagonally (practically at an angle of 45°) with respect to the shaft.
In the case of a bolt with a threaded hole, the connection angle can be 45 degrees at the even angle portion, so it can be used as a connection member for braces, flints, etc. (Fig. 2) Furthermore, in the case of a bolt in which part or all of the threaded portion of the bolt is covered with a thin film of adhesive in the third embodiment, after screwing the nut, the nut will not be damaged due to wood loss or vibration. There is no risk of loosening or falling off. Therefore, it is possible to save the effort of pinning after screwing the nut, applying double nuts, etc. (FIG. 9) Furthermore, since the structure is simple, it can be provided at low cost.

[Brief explanation of the drawing]

In the accompanying drawings showing the embodiments, Fig. 1 is a plan view showing a state in which a T-shaped dovetail joint is connected using the bolt of the present invention, and Fig. 2 is a plan view showing a state in which the T-shaped even corner portion is connected. Fig. 3 is an enlarged perspective view of a bolt according to the present invention, Fig. 4 is an enlarged perspective view of a bolt with a washer formed thereon, Fig. 5 is an enlarged perspective view of a bolt with a threaded hole cut in an oblique direction, and Fig. 6 is an enlarged perspective view of a bolt according to the present invention. The figure is an enlarged plan view of a bolt with a circularly bulged head, Figure 7 is an enlarged sectional view taken along line A-A in Figure 6, and Figure 8 is an enlarged perspective view of a screw. Figure 9 is a threaded portion of the bolt. FIG. 3 is a partially cutaway enlarged cross-sectional view showing a state in which the adhesive is covered.

Claims (1)

[Scope of utility model registration request] In a fixed hardware having a bolt hole drilled in a direction transverse or oblique to the bolt axis, the head side 4 is expanded in the axial direction and in a direction perpendicular to the axial direction, and the end face thereof is provided with a rotation groove 7, and a tightening bolt 3 having a screw hole 6 laterally and/or obliquely drilled in the expanded head;
A connecting reinforcement hardware such as a T-shaped joint, which is characterized by connecting connecting bolts 13 to each other.