JPH05248010A - Joining auxiliary member for joining part of friction bolt - Google Patents

Abstract

PURPOSE:To make the tightening force of a high strength bolt effective by mounting joining auxiliary members between a mother material and spliced plates, and forming many projections on the full faces of both surfaces of the plate body of the joining auxiliary member. CONSTITUTION:In a joining auxiliary member 1 for a friction bolt joining part, many quadripyramidal projections 4 are lattice-likely formed on both faces of a circular plate body 3 having a bolt hole 2 in the center. The joining auxiliary members 1 are mounted between the end parts of a mother material 5 such as steel frame and spliced plates 6, and a high strength bolt 7 is inserted through the bolt holes 2, the respective spliced plates 6, and the mother material 5, so as to tightly fasten them. Consequently, all the projections 4 bite in the surfaces of the mother material 5 and the spliced plates 6 uniformly and surely, so as to prevent slip.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining auxiliary member used for a friction bolt joining portion of a steel structure material.

[0002]

2. Description of the Related Art Friction bolt joining (high strength bolt joining) is
This is a method of joining steel frame structural materials using high-strength bolts (high-tensile bolts), in which axial force is introduced into the bolts to strongly clamp the joining members together, and the stress is transmitted by the frictional resistance acting between the members. .

Conventionally, in order to increase the friction coefficient of the joint surface between the base material and the addition plate at the friction bolt joint, sufficient red rust is generated on the joint surface between the base material and the addition plate, or shot blasting is performed. A predetermined slip coefficient (μ = 0.45) is obtained by roughening the surface.

The former method of generating red rust is a method of removing black skin on the surface of a steel sheet by a grinder polishing machine or the like and leaving the polished surface in the air for about one week to generate red rust, and the latter shot blasting. The treatment is a method in which the black skin on the surface of the steel sheet is similarly removed and then a rough and appropriate uneven state is formed on the polished surface by shot blasting.

[0005]

However, the conventional friction bolt joints described above must not slip (μ = 1.0).
Although it is unavoidable that the specified slip coefficient is used, there is variation in the slip coefficient of the joint surface and there is sufficient resistance to friction bolt joints (slip resistance).
Is difficult to manage. In addition, in order to increase the friction coefficient, both the method of generating red rust and the method of performing shot blasting are performed in the steel processing factory, but cranes, grinder sanders, and shot blasting machines for moving members are used. It requires a lot of work. In particular, the occurrence of rust has become a bottleneck in the steel frame processing, such as the date and time for the occurrence of predetermined rust, and a place for leaving the rust necessary.

[0006] Therefore, an object of the present invention is to provide a joining auxiliary member for a friction bolt joint which can eliminate the need for a working step in a steel frame working factory for increasing the friction coefficient of the joining surface.

[0007]

In order to solve the above-mentioned problems, a joining assisting member of a friction bolt joining portion of the present invention is a joining assisting member interposed between a base material and an addition plate in the friction bolt joining portion, A plate-shaped body made of a material that is stronger and harder than the base material and the added plate, has a bolt hole in the center, and has a size within the range of the influence of the tightening force of one high-strength bolt. A large number of protrusions are formed on the entire surfaces of both sides.

[0008]

In the above means, each high-strength bolt is used, and by tightening the high-strength bolt between the base material and the attachment plate, all the protrusions bite into the base material and the attachment plate uniformly and surely.

As the plate-like body, a material having strength and hardness superior to that of a steel material (eg SS41) usually used as a base material is used.

It is preferable to prepare several kinds of plate-like bodies having different thicknesses in the range of 1 to 10 mm including projections. By doing so, when joining base materials having different thicknesses A thickness adjustment function can be added.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 and 2 are a plan view and a half-sectional side view of a joining assisting member of a friction bolt joining portion according to an embodiment of the present invention.

Joining auxiliary member 1 of this friction bolt joining portion
Is formed by forming a large number of quadrangular pyramid-shaped projections 4 in a grid pattern on both surfaces of a circular plate-shaped body 3 having a bolt hole 2 in the center.

The joining assisting member 1 is made of a material having higher strength and hardness than a base material and an attached plate described later, and has a size within a range affected by the tightening force of one high strength bolt, for example, a high strength bolt. If the diameter is 16 to 25 mm and the thickness of the attached plate is 12 mm, the outer diameter is 54
Has a size of ~ 70 mm, and the thickness including the protrusion 4 is 1 ~
Several different types are available within the range of 10 mm.

As shown in FIG. 3, the joining assisting member 1 having the above-mentioned structure is made of a structural material such as SS41 and is made of the same structural material as the end portions of the base materials 5 such as steel frames which are linearly butted against each other. The high-strength bolt 7 is inserted between the end plates of the base materials 5 and the attachment plates 6 arranged on both sides, and the bolt holes 2 and the addition plates 6 and the base material 5 are inserted. By tightening one by one, all the protrusions 4 bite into the surfaces of the base material 5 and the add plate 6 uniformly and surely, preventing the slip of the base material 5 and the add plate 6 and improving the slip resistance of both. The joint strength of the friction bolt joint portion by the high-strength bolt 7 is increased.

The joining assisting member 1 is not limited to the one shown in FIGS. 1 and 2, but a bolt hole 9 is formed in the central portion like the joining assisting member 8 shown in FIGS. 4 and 5, for example. The plate-like body 10 provided is made square and the hemispherical projections 1 are provided on both sides thereof.
1 is formed in a lattice shape, or like the joining assisting member 12 shown in FIGS. 6 and 7, the plate-like body 14 provided with the bolt hole 13 in the center is made into a regular hexagon, and the shot blasting treatment is performed on both surfaces thereof. The protrusions 15 may be formed to form a large number of protrusions 15, and the shapes of the plate-shaped members 3, 10, 14 and the arrangement, size, shape, number, etc. of the protrusions 4, 11, 15 may be changed as appropriate.

Further, the projections 4 of the joining assisting members 1, 8 and 12 are
The numbers 11 and 15 are not limited to the case where both sides are formed the same, and the arrangement, size, number, etc. of the protrusions 4, 11 and 15 can be changed for each side as necessary.

Further, it is preferable that the joining assisting members 1, 8 and 12 have magnetism, and by doing so, workability can be improved.

Further, the joining assisting members 1, 8 and 12 include
It is preferable to apply anticorrosion treatment, and by doing so, it is possible to prevent rusting from the friction bolt joint.

Further, the surfaces of the base material 5 and the attachment plate 6 on which the joining assisting members 1, 18 and 12 are interposed may be in the state of black skin, or the state where the black skin is removed by a rust generating agent or the like. Good.

[0020]

As described above, according to the joining auxiliary member of the friction bolt joining portion of the present invention, all the protrusions are evenly formed on the base material and the addition plate by tightening the base material and the addition plate with the high-strength bolt. In addition, since it securely bites, the tightening force of high-strength bolts can be used efficiently, and the slip coefficient does not vary as in the past, and the required slip resistance is artificially (steadily) obtained. In addition, it is not necessary to perform processing in the steel frame processing factory to increase the friction coefficient, and on-site joining by friction bolt joining can be performed easily and reliably, while each high strength bolt is used. Therefore, there is an effect that the bolt arrangement can be arbitrarily set, the weight and the size are small, the carrying is convenient, and the resource can be saved.

[Brief description of drawings]

FIG. 1 is a plan view of a joining auxiliary member of a friction bolt joining portion according to an embodiment of the present invention.

FIG. 2 is a half sectional side view of a joining assisting member of a friction bolt joining portion according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a friction bolt joint portion joined using the joining auxiliary member according to the embodiment of the present invention.

FIG. 4 is a plan view of a joining auxiliary member of a friction bolt joining portion according to another embodiment of the present invention.

FIG. 5 is a half sectional side view of a joining assisting member of a friction bolt joining portion according to another embodiment of the present invention.

FIG. 6 is a plan view of a joining auxiliary member of a friction bolt joining portion according to still another embodiment of the present invention.

FIG. 7 is a half sectional side view of a joining assisting member of a friction bolt joining portion according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joining auxiliary member 2 Bolt hole 3 Plate-like body 4 Protrusion 8 Joining auxiliary member 9 Bolt hole 10 Plate-like body 11 Protrusion 12 Joining assisting member 13 Bolt hole 14 Plate-like body 15 Protrusion

Claims (1)

[Claims] 1. A joining assisting member interposed between a base material and an addition plate in a friction bolt joining portion, which is made of a material having higher strength and hardness than the base material and the addition plate, and has a bolt hole in a central portion. And a joining assisting member for a friction bolt joining portion, which is formed by forming a large number of protrusions on both entire surfaces of a plate-like body having a size within a range in which the tightening force of one high-strength bolt is affected.