JPH0526221A - Backing metal - Google Patents

Abstract

PURPOSE:To improve the strength in the periphery of a bolt hole, and facilitate the confirmation of the condition of a head part, and eliminate a fixing means of a bolt main frame at the nut fastening time in the case of jointing junction members with one-side high strength bolt. CONSTITUTION:A bolt hole 3, in which a bolt main frame 8 and a head part 9 of a high strength bolt 7 can be inserted, is provided in a fitting main frame 2, which can abut on the other side surfaces of multiple junction members 13, 14. On the other hand, a stopper 4, on which the head part 9 can abut, is provided at an axial symmetrical position near the bolt hole 3 to increase the plate thickness of the whole of a junction part near the bolt hole 3, and while the head part 9 is positioned by abutment of the stopper 4 and the head part 9, and the rotation of the bolt main frame 8 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backing member, and in particular, it is provided at one end of a bolt body so as to extend in a radial direction and an axial direction, and is inserted into bolt holes of a plurality of joining members from one side. The present invention relates to a backing metal member for locking the head of a high-strength bolt on the other side of a plurality of joining members.

[0002]

2. Description of the Related Art In recent years, it has been taken into consideration that high-strength bolt joining of a plurality of joining members such as column columns made of seamless rectangular steel pipes or beams made of column columns and H-section steel is easily performed in a short time. There is. This high-strength bolt joining method enables so-called one-side high-strength bolts that enable a plurality of joining members to be tightly connected by inserting a head from one side into the bolt holes and screwing a nut into a threaded portion on one side. The one-sided high-strength bolt 21 has one end portion of the bolt main body 22 as shown in FIG.
A head portion 23 is provided which is in the shape of a semicircular plate thicker than the outer diameter of the bolt body 22 and extends in the radial and axial directions.
The other end is provided with a threaded portion 24 and a tail portion 26 which is connected to the threaded portion 24 with a groove 25 interposed therebetween. As shown in FIGS.
Oval bolt holes 29 corresponding to the head portion 23 of the head hole 23 are provided, and the head portion 23 is inserted from one side (the right side in FIGS. 5 and 6) into the bolt holes 29, and the washer 30 and the nut 31 are used. Rotate the bolt body 22 mounted with about 90 degrees so that the head portion 23 crosses the bolt hole 29 (see FIG. 7), and the positioning protrusion 32 provided on the washer 30 is engaged with the bolt hole 29. After the bolt main body 22 is positioned at the center, the tail 26 is gripped to fix the bolt main body 22, and the nut 31 is tightened to fix the plurality of joint members 2.
7 and 28 are joined. The tail portion 26 is cut from the bolt body 22 by the groove portion 25 when the tightening of the nut 31 reaches the required torque.

[0003]

However, in the high-strength bolt joining method of a plurality of joining members using the so-called one-side high-strength bolt, in order to pass the head through the plurality of joining members, the bolt main body is cut off. Since a bolt hole that is much larger than the area is provided, there is a problem that the strength around the bolt hole decreases, and the head body makes a cross with the bolt hole by rotating the bolt body after inserting the bolt hole. There is the problem that it is difficult to determine if there is and a tail is required to tighten the nut.

In view of the above, the present invention can improve the strength around the bolt holes in the high-strength bolt joining method for joining a plurality of joining members using so-called one-side high-strength bolts, and can improve the strength of the head portion accompanying the rotation of the bolt body. It can be easy to check the condition,
Moreover, it is an object of the present invention to provide a backing material that does not require a fixing means of a bolt body when tightening a nut.

[0005]

In order to solve the above-mentioned problems, a backing metal article of the present invention is provided at one end of a bolt main body so as to extend in the radial direction and the axial direction, and has bolt holes for a plurality of joining members. A head metal of a high-strength bolt inserted from one side to the other side of a plurality of joining members,
A plate-shaped metal body that can be in contact with the other side surface of the plurality of joining members is provided with a bolt hole that allows the bolt body and the head of the high-strength bolt to be inserted therethrough. The stopper is provided so that the head can be contacted.

[0006]

In the above means, the plate thickness of the entire joint portion around the bolt hole is increased, and the positioning of the head and the rotation of the bolt body are prevented by the contact between the stopper and the head. A stopper arm that prevents the high-strength bolt from falling off to the other side surface side is preferably installed between the stoppers. Further, it is preferable that the stopper arm is provided with a positioning projection that engages with a countersink hole provided at the center of one end surface of the high-strength bolt.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a backing metal article according to an embodiment of the present invention. The backing metal article 1 is a required position of a rectangular plate-shaped metal article main body 2 capable of contacting other side surfaces of a plurality of joining members described later. On the other hand, a plurality of bolt holes 3 through which a bolt body and a head of a high-strength bolt, which will be described later, can be inserted are provided, while each bolt hole 3
Stoppers 4 in the shape of a rectangular parallelepiped that can contact the head portion are provided parallel to each other at two axially symmetric positions around the. The bolt hole 3 is connected to the circular through hole 301 through which the bolt main body can be inserted, and the axially symmetric position of the through hole 301 so as to form a right angle with the stopper 4 so that the head portion can be inserted through. It has a rectangular notch 302.
In addition, a stopper arm 5 (see FIG. 3) is installed between the stoppers 4 to prevent the high-strength bolts from being inserted into the other side of the plurality of joint members. A positioning protrusion 6 is provided so as to project.

The high-strength bolt 7 is, as shown in FIG.
The head 9 is integrally provided at two axially symmetrical positions on the outer circumference of one end of the bolt body 8 by appropriately thinning the outer diameter of the bolt body 8 and appropriately extending in the radial direction and the axial direction. A screw portion 10 is provided on the outer periphery of the other end portion of the bolt body 8, and the center of one end surface of the bolt body 8 is
A countersink hole 11 with which the positioning protrusion 6 of the stopper arm 5 is engaged is provided.

By using the backing metal 1 and the high-strength bolt 7 having the above-mentioned structure, a plurality of joint members such as column pillars made of seamless square steel pipe or beams made of H-shaped steel and the column pillar are connected to each other by high-strength bolts. For joining, first, as shown in FIG. 3, joining members 13 and 14 in which bolt holes 12 having substantially the same shape as the shape of the bolt body 8 and the head portion 9 of the high-strength bolt 8 are provided at required positions are overlapped. After that, the backing metal 1 is brought into contact with the other side surface (the upper surface in FIG. 3) of the plurality of joining members 13.

Next, the head portion 9 of the high-strength bolt 7 is inserted into the bolt holes 12 of the plurality of joint members 13 and 14 from one side (the lower side in FIG. 3), and the stopper is inserted into the countersink hole 11 of the bolt body 8. When the positioning protrusion 6 of the arm 5 is engaged, the high-strength bolt 7 is rotated clockwise by about 90 °. By this rotation, the head 9 comes into contact with the stopper 4 to position the head 9, and the rotation of the bolt body 8 is prevented. And
When the washer 15 is fitted to the bolt body 8 and the nut 16 is screwed into the screw portion 10 and tightened, the high-strength bolt joining of the joining members 13 and 14 is performed.

In the above embodiment, the stopper 4
Although the case where the above is provided in the shape of a rectangular parallelepiped has been described, the present invention is not limited to this, and a point-like one may be used as long as the high-strength bolt 7 can be positioned and stopped. Further, in the above-described embodiment, the case where the head 9 is inserted into the bolt holes 12 and 13 and the washer 15 is fitted and the nut 16 is screwed after rotating by about 90 ° has been described. Not limited to this, the head 9 may be inserted while the washer 15 and the nut 16 are attached in advance.

In this case, by adjusting the screwing position of the nut 16 appropriately, the nut 16 and the washer 15 can be adjusted.
Functions as an axial stopper for the high-strength bolt 7, so that the stopper arm 5 and the like need not be provided. Further, the head 9 is not limited to be thinner than the outer diameter of the bolt body 8, but may be thick as shown in FIG. in this case,
The bolt hole 3 of the backing hardware 1 has an oval shape.

Further, the head portion 9 is not limited to being provided at two axially symmetrical positions on the outer periphery of the one end portion of the bolt body 8, but may be provided at several portions. In this case, the bolt hole 3 of the backing hardware 1 is
A through hole 301 and a rectangular notch 3 which is continuously provided at several axially symmetrical positions of the through hole 301 and allows the head portion to be inserted therethrough.
02 and the stopper 4 between the adjacent notches 302.
Is provided. Furthermore, the metal body 2 is not limited to the rectangular plate shape, but may be an L-shape or a U shape that can be engaged with the inner corner of the column pillar.
It may be bent into a letter shape or another shape.

[0014]

As described above, according to the backing material of the present invention, the plate thickness of the entire joint portion around the bolt hole is increased, so that the strength of the portion can be improved. or,
Positioning of the head and rotation of the bolt body are prevented by the contact between the stopper and the head, so it is easy to check the state of the head with respect to the bolt hole, and like the tail of the conventional Torcia type. It is possible to eliminate the need for fixing the bolt body when tightening the nut.

[Brief description of drawings]

FIG. 1 is a front view of a backing metal member according to an embodiment of the present invention.

FIG. 2 is a perspective view of a high-strength bolt used for joining a plurality of joining members together with the backing metal member.

FIG. 3 is a cross-sectional view of a joint portion by high-strength bolt joining using the backing metal.

FIG. 4 is a perspective view of a conventional high strength bolt.

FIG. 5 is a cross-sectional view of a process of joining a joining member using a conventional high-strength bolt.

FIG. 6 is a cross-sectional view of a joining member joined using a conventional high-strength bolt.

FIG. 7 is a view taken along line VII-VII in FIG.

[Explanation of symbols]

 2 Hardware main body 3 Bolt hole 4 Stopper 7 High-strength bolt 8 Bolt body 9 Head 12 Bolt hole 13 Joining member 14 Joining member

Claims (1)

Claim: What is claimed is: 1. A head of a high-strength bolt, which is provided at one end of a bolt main body so as to extend in the radial direction and the axial direction, and is inserted from one side into bolt holes of a plurality of joining members. Is a backing metal fitting that is locked on the other side of the plurality of joining members, and the bolt body and the head of the high-strength bolt are attached to a plate-shaped hardware body that can contact the other side surface of the plurality of joining members. A backing metal article, wherein a bolt hole that allows insertion is provided, and a stopper that allows the head to contact is provided at an axially symmetrical position around the bolt hole.