JPH0333790B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and material for adjusting the base material for joints of structures, and more specifically, the present invention relates to a method for adjusting the base material for a joint part of a structure and a material for adjusting the base material. The present invention relates to a joint surface preparation method that allows easy adjustment of chemical solutions to improve frictional force during joining, and a material for the preparation.

[Prior Art] When connecting steel materials that form the framework of a structure, the steel materials are usually connected with bolts by passing a backing plate between the steel materials. The connection is a so-called friction connection, in which the plate and the steel base plate are strongly tightened with bolts.
The frictional force generated between the base plate and the contact plate is used to increase the bonding force between them.

To achieve this, in the past, the bonding surfaces of the base metals were adjusted using grinder finishing, paper finishing, etc., and black scale, mill scale, etc. generated during the steel manufacturing process were removed from the bonding surfaces to achieve the desired design. It is designed to provide durability.
This is because if black scale, mill scale, etc. are present on the joint surface, slippage can easily occur between the base material and the plate.
This is because the frictional force on the bonding surfaces decreases, resulting in a loss of bonding strength.

Adjusting the bonding surface by mechanical finishing as described above requires a great deal of effort, generates significant noise, and requires special processing equipment tailored to the shape of the base material. There are drawbacks such as becoming. Therefore, in recent years, methods have been adopted to eliminate the difficulties in mechanical processing by chemically treating the bonding surfaces of base materials.

[Problem to be solved by the invention]

The chemical treatment described above involves the use of chemicals, but when applying the chemicals to the base material, the desired joint parts of steel materials such as section steel are immersed in the chemical solution, and the above-mentioned mill scale etc. The basic method is to remove and prepare the surface.
However, for large steel materials used in large structures, immersing the entire material would result in waste. Therefore, it is preferable to immerse only the joint portions in several locations of the steel material into the chemical solution, but in practice, such partial immersion is often difficult.

To solve this problem, there are methods such as brushing a chemical solution only on desired parts of the base material or applying a material impregnated with a chemical solution. However, in this case, since 3 to 4 hours are required for the reaction between the chemical solution and the metal surface of the base material, the chemical solution evaporates during that time, resulting in the disadvantage that the desired chemical treatment cannot be carried out sufficiently. At present, it is not possible to easily treat it with chemicals.

The present invention aims to eliminate the drawbacks that occur when performing the above-mentioned chemical treatment, and its purpose is to:
By applying the chemical solution only to the joints of the base materials, we can eliminate chemical waste and prevent chemical processing from becoming insufficient due to evaporation of the chemical solution during the chemical treatment. It is an object of the present invention to provide a method and material for adjusting the joint surface of a structure, which achieves the retention of the structure.

[Means to solve the problem]

The method for adjusting the joint surface of a structure according to the present invention includes the first
Referring to the figure, one side of a porous holder 1 or a fibrous holder impregnated with a metal substrate conditioning liquid for adjusting the substrate of steel materials and other structural materials is provided with evaporation prevention that can withstand the metal substrate conditioning liquid. A joint surface conditioning material lined with material 2 is prepared, and the surface of the joint surface conditioning material that is not lined with evaporation prevention material 2 is coated with the surface of the steel materials 7, 8 and other structural materials to be conditioned. The reason is that it is attached to the adjustment surface.

The invention of a material for conditioning the joints of structures involves impregnating a porous holder 1 or a fibrous holder with a metal substrate conditioning solution, and applying an evaporation prevention material 1 that can withstand the metal substrate conditioning solution to the porous holder 1 or the fibrous holder. It is formed by lining one side of a fibrous support.

〔Effect of the invention〕

According to the present invention, a chemical treatment agent can be applied directly and partially to the substrate preparation surface of a base material such as steel, and the chemical solution can be prevented from evaporating during the chemical treatment by using an evaporation prevention material. Insufficient chemical treatment can be avoided by doing the following. In addition, the local application of the joint surface conditioning material eliminates wastage of chemicals. Furthermore, it is possible to apply a predetermined chemical treatment to any location by simply pasting it, regardless of the width or complexity of the substrate preparation surface of the steel materials to be bonded or the like, or the complexity of the shape.

〔Example〕

The present invention will be described in detail below based on examples thereof.

FIG. 1 is an overall perspective view of the joint surface conditioning material, which consists of a porous holder 1 or a fibrous holder and an evaporation prevention material 2. The porous holder 1 is, for example, a synthetic resin sponge-like material, and in the case of a fibrous holder, cotton cloth or the like is used. These are, for example, about 0.3 cm thick, 10 cm wide, and 15 cm long, and are pre-impregnated with a metal substrate conditioning liquid for adjusting the substrates of steel and other structural materials. An evaporation prevention material 2 that can withstand the metal substrate conditioning liquid is adhered to one wide surface of the porous holder 1 and is lined therewith.

The evaporation prevention material 2 is used to prevent the metal substrate conditioning liquid from evaporating or leaching, and to hold the metal substrate conditioning liquid in the porous holder 1 or the like. For this purpose, a material such as a polyethylene film is employed as the evaporation prevention material 2, for example.

The joint surface conditioning material produced in this manner is adhered to the surface conditioning surface of steel and other metal structural materials forming the frame of the structure. In other words, evaporation prevention material 2 in the joint surface conditioning material
One surface of the porous holder 1 on the side where there is no
As shown in FIGS. 2 and 3, it is applied to the vertical surface 3 of the base material, the ceiling surface 4, etc. At this time, the joint surface conditioning material adheres to the base metal surface due to the surface tension of the metal substrate conditioning liquid, and this state is maintained. After 3 to 4 hours have elapsed during the attachment, the chemical reaction is complete. Then, black scale, mill scale, etc., which reduce the frictional force on the joint surface during subsequent bolt tightening, are eluted, and the bare metal surface is exposed on the desired friction surface 9.

When the metal surface appears in this way, the preparation of the surface is sufficient, and the metal surface is rusted to form a metal surface.
After this, as shown in FIG. 4, bolts 6 are tightened to connect both base materials 7 and 8.

As you can see from this, regardless of the width of the steel surfaces to be joined, or the complexity of their shape, such as vertical or ceiling surfaces, simply pasting the joint surface conditioning material on any part will do the trick. Predetermined chemical treatments can be applied. Therefore, not only can defects caused by machining be eliminated, but also there is no need to immerse the base material in a chemical solution. Therefore, once immersed, large-scale chemical treatment equipment, transportation equipment for the treatment, and various associated processes are required. Furthermore, without being limited by the size or shape of the metal base material, the surface of the bonding surface can be easily adjusted only at desired locations. In addition, since the base material may be steel or other metal material, it goes without saying that a well-known substrate conditioning liquid suitable for each material is employed.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the joint surface conditioning material of the present invention, Figures 2 and 3 are usage conditions in which the joint surface conditioning material is adhered to a section steel, and Figure 4 is a front view of the steel bonded state. and a side view. 1... Porous holding body, 2... Evaporation prevention material,
7, 8... Steel material (base material).

Claims (1)

[Scope of Claims] 1. A porous holder or a fibrous holder impregnated with a metal substrate conditioning liquid for adjusting the substrate of steel materials and other structural materials, with an evaporation prevention material on one side that can withstand the metal substrate conditioning liquid. Prepare a joint surface conditioning material that is lined with the material, and attach the surface of the joint surface conditioning material that is not lined with the evaporation prevention material to the surface conditioning surface of the steel material or other structural material to be surface conditioned. A method for adjusting the joint surface of a structure, characterized by: 2. A porous holder or fibrous holder is impregnated with a metal substrate conditioning liquid, and one side of the porous holder or fibrous holder is lined with an evaporation prevention material that can withstand the metal substrate conditioning liquid. A material for controlling the joint surface of structures.