JPH05280102A - Bolt clamping method and friction sheet for bolt clamping - Google Patents

Abstract

PURPOSE:To obtain sufficient strength irrespective of the surface condition of a joining position of steel materials even if the surface of the joining position has a small friction coefficient such as a painted surface or a plated surface in a joining of steel materials by high tension bolts. CONSTITUTION:In the case steel materials 1 and 2 are joined with high tension bolts, a friction sheet 10 of a sheet-like material maintaining fine particles having high hardness thereon is made to lie between joining surfaces around bolt insertion holes 3 and 4 of the steel materials. The steel materials are clamped and fixed with the high tension bolts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining construction steel materials such as H-shaped steel and mountain steel with high tension bolts (high strength bolts) and tools used in the method.

[0002]

2. Description of the Related Art For example, in joining steel materials for beams, various joining plate members having bolt holes are welded to one steel material in advance in accordance with the joining site, angle and the like. And a bolt hole provided in the vicinity of the end of the other steel material to be joined together, and fastened and fixed by a high strength bolt. The high-strength bolt is made of steel that has been heat-treated so as to have a predetermined yield strength and ultimate strength. The high-strength bolt is fixed by the frictional force generated between the plates due to its strong tensile force.

Therefore, the condition of the joint surface of the steel material greatly affects the strength of the bolt connection. Generally, steel materials are subjected to various rust prevention treatments to prevent rust,
The joints to be bolted are devised in each rust-prevention treatment process so that painting or plating is not performed, and the steel material is exposed as it is.
As a result, if rust is generated at the joining part, it is used as it is.If rust is insufficient, a suitable rust generator is applied to generate red rust. Then, the coefficient of friction of the surface is increased, and then the bolt connection is performed.

[0004]

SUMMARY OF THE INVENTION The present invention does not require control of the surface of the joint portion in such bolt connection, and does not require troublesome anticorrosion treatment of the joint portion even in the rust prevention treatment of steel materials. An object of the present invention is to provide a joining method of steel materials and a tool therefor capable of obtaining sufficient strength irrespective of the surface condition of the joining portion of the steel materials.

[0005]

According to the first aspect of the present invention, when steel members are bolted together by high-strength bolts, fine particles of high hardness are held in a sheet-like material on the joint surface around the bolt insertion hole of the steel member. In the method of joining steel materials by bolts, a friction sheet made up of the above is interposed and fastened and fixed by high-strength bolts. The second gist of the present invention is
For bolting steel materials, in which fine particles with high hardness are held on the surface of a sheet material through which bolts can be inserted, and the back surface of the sheet material has an adhesive surface that can be affixed to a steel material surface. Located on the friction sheet. Hereinafter, a detailed description will be given with reference to the drawings.

[0006]

EXAMPLE In FIG. 1, the surface of steel materials 1 and 2 for construction is entirely coated with a resin coating for rust prevention, and bolt holes 3, 3, ..., 4, 4, ... , Are drilled at corresponding positions. In the method of the present application, first, a friction sheet 10 formed by gluing fine particles of quartz on a surface of an extremely thin paper to a joint surface of any one steel material 2 so as to substantially cover the paper surface is used. The steel material 2 is attached to the four corners of the
It is affixed to the joint surface 2a with the steel material 1 and fixed.

In this state, both steel materials 1 and 2 to be bolted are positioned and superposed by their bolt holes and fastened and fixed by high strength bolts.
At this time, the particles on the friction sheet break the paper that holds the friction sheet and the coating film applied to the steel material surface and bite into the steel material, and microscopically, the joint surface of both steel materials has a common The wedges are driven in and the sliding of the two is hindered and a strong bolt connection is obtained.

In the above-mentioned embodiment, the friction sheet is a thin paper in which sand grains are arranged and glued.
This may be a resin or paste mixed with friction-producing particles such as high hardness ceramic powder or metal oxide powder, and formed into a film, and further, on both sides of a reticulated woven fabric with many voids, It may be one to which friction-producing particles are attached. Further, in the embodiment, in advance, in accordance with the position of the bolt hole of the steel material, the friction sheet provided with the bolt insertion hole is illustrated, but this is not always necessary, the bolt breaks the friction sheet when the bolt is inserted, It may pass through.

[0009]

[Effects] According to the bolt joining method of the steel material of the present application, the rustproofing treatment of the steel material is greatly simplified, which is effective in reducing the steel material manufacturing cost, and the operator can also check the surface condition of the joint part. There is no need to pay attention, and the strength of the bolt connection can be made uniform regardless of the surface condition.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1, 2 Steel material 3, 4 Bolt hole 10 Friction sheet

Claims (2)

[Claims] 1. When bolting steel members together with a high-strength bolt, a friction sheet formed by holding fine particles of high hardness in a sheet-like object is intervened on the joint surface around the bolt insertion hole of the steel member, A method for connecting steel bolts, characterized by tightening and fixing with high-strength bolts. 2. A surface of a sheet-like material into which a bolt can be inserted,
A friction sheet for joining bolts of steel material, which holds fine particles having high hardness, and has an adhesive surface on the back surface of the sheet-like material, which can be stuck and fixed to the surface of steel material.