JPH09112520A - Corrosion preventive covering method for bolt and nut part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and securely carry out the overhead covering work by fixing a vessel such as a cup with a working wire such a wire slightly apart from the bolt and nut parts, and then filling the vessel with an anticorrosive, and by carrying out the covering and fixing work by means of the vessel while utilizing the working wire. SOLUTION: When a bolt and nut exposed at the attachedly contacting part of a steel structure or the like is subjected to corrosion preventive covering, first, a stainless steel wire 6 as a working wire is windedly fixed to the pitch part 5 of a nut 2, and then the ends of the wire are extended. After the wire 6 has been passed through the holes 9 formed in the plastic cup 8 as the vessel from inside, the ends of the wire are bundled to support the cup 8, and an anticorrosive 10 is filled. Then, the cup 8 is drawn up along the wire 6 to approach the nut 2 and the bolt 1, and the nut 2 and the bolt 1 are covered with the cup 8 respectively. The wire 6 extended outside the cup 8 is wound around a bar 11, and this is turned so that the cup 8 is pushed to the nut 2 and the bolt 1 and is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to steel structures and concretes.
For anticorrosion coating of bolts and nuts exposed at the splicing parts of structures, etc., especially useful for covering the bolts and nuts located on the horizontal surface of the structure with a container containing foodstuffs. The present invention also relates to a method for easily performing work in the.

[0002]

2. Description of the Related Art Generally, a large number of bolts and nuts are used for splicing parts of steel structures such as bridges and building steel frames and concrete structures. The part where these bolts and nuts are exposed in the structure is apt to rust early in an outdoor environment, and corrosion progresses from the part, which adversely affects the strength of the structure itself. The exposed bolts and nuts have been anticorrosive coated.

However, since the bolts and nuts have complicated shapes, it is difficult to obtain a sufficient amount of coating at the corners by the ordinary coating method, and voids are easily formed, resulting in poor corrosion resistance.

Therefore, the present applicant has proposed a method of covering and fixing the bolts and nuts with a container such as a plastic cup or an aluminum cup which is pre-filled with food-proof material (for example, Japanese Patent Laid-Open No. 50-14966). According to this method, it is possible to secure a sufficient amount of anti-corrosion material in the bolt portion and the nut portion by a simple work and maintain good anticorrosion property for a long time, but it is an overhead work on the bottom of the bridge girder etc. Therefore, depending on the size of the bolt or the like, there is a problem that the coating work is difficult to perform, such as when the container filled with the food-proof material is spilled when it is lifted or a void is left when the container is fixed.

[0005]

Therefore, as a result of intensive studies to solve the above problems, the present inventors have found that a wire such as a wire is not filled in a container such as a cup in advance before the coating work. Use a work line such as to fix a container such as a cup slightly away from the bolts and nuts, and then fill the container with food-proof ingredients and use the work line to cover and fix the container. It was found that the above-mentioned coating can be performed simply and reliably by performing the above-mentioned work, and the present invention has been achieved.

[0006] That is, the present invention is a method of covering a bolt portion and / or a nut portion exposed in a structure with a container filled with a food-proof material, wherein a working line is provided on the bolt portion and / or the nut portion. After fixing it, and then providing a hole for passing the working wire in the container that covers the part at the bottom, and passing the wire from the inside of the container to the outside through the hole of the container, fill the container with anti-food material. Then, the bolt portion and / or the nut portion is covered with the container containing the food-proof material, and then the work line extending to the outside of the container is wound around the rod-shaped object, and the container is rotated by rotating the rod-shaped object to bolt the container containing the food-proof material. The present invention relates to an anticorrosion coating method for a bolt part and a nut part, which is characterized in that it is fixed to the nut part and / or the nut part.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The present invention is not limited to the following example.

FIG. 1 is a schematic process diagram showing an embodiment of the method of the present invention. In FIG. 1, (a) is a case where the nut is located on the bottom surface of the steel plate, (b) is a case where the bolt is located on the bottom surface of the steel plate, 1 is a bolt, 2 is a nut, 3 is a washer,
4 is a steel plate to which these bolts and nuts are connected. Here, the method of the present invention is exemplified for the nuts and bolts located on the bottom surface.

First, a stainless wire 6 is fixed as a work line to a nut in (a) and to a bolt in (b).
The work line can be selected without any particular limitation as long as it does not rust and has strength. For example, stainless wire, copper wire, galvanized wire, etc. can be used. It is desirable that the length be such that at least the length of the container used for covering and covering, which will be described later, is secured from the fixed portions of the nuts and bolts.

The stainless steel wire 6 is fixed by, for example, winding it around the pitch portion 5 of the nut 2 in (a), (b).
Then, a stainless steel stopper 7 is attached to the bolt 1 and then a stainless wire 6 is passed through the stopper 7.
After the stainless wire 6 is fixed, the needle tip is extended.

Then, as shown in FIGS. 1A 'and 1B', a hole 9 for passing the stainless wire 6 through a plastic cup 8 as a container for covering the nut 2 and the bolt 1 therein.
Is provided at the bottom, and the stainless steel wire 6 is inserted from the inside of the plastic cup 8 to the outside of the plastic cup 8.
It is desirable to bundle the needle tips of the wires 6 after passing through the wire so that the plastic cup 8 is supported by the wires 6. After that, the plastic cup 8 is filled with the anti-corrosion material 10 so that the cup is full or heaped up.

In the present invention, a concave cup is suitable as the container filled with the food-proof material, for example, a plastic cup such as a polyethylene-based, polypropylene-based, polyester-based, polystyrene-based, acrylic-based, melamine-based, or urea-based cup. Aluminum cup, copper cup, stainless cup, etc. can be used. The shape of the container is not particularly limited as long as it is concave, but it is usually molded in a semi-spherical or columnar shape, and its outer diameter is about 7 mm from that of the bolt or nut part. As described above, it is desirable that the length is about 5 mm or more than that of the bolt or nut portion. A hole for passing the work line is provided at the bottom before using it for work. Adjust the size of the hole according to the thickness of the work line used.

As the anticorrosive material used in the present invention, conventionally known anticorrosion paints, sealing materials, putty materials, etc. can be used. For example, epoxy resin type, phenol resin type, polyurethane resin type, polysulfide polymer Examples thereof include two-pack type and one-pack type such as system, silicone rubber and non-drying oil. The anticorrosive material can be made into a paste by kneading a resin component with pigments, additives and the like.

Then, as shown in FIGS. 1 (a) and 1 (b)), a plastic cup 8 filled with the anti-corrosion material 10 is brought close to the nut 2 and the bolt 1 along the wire 6 while pulling them up. The nut 2 and the bolt 1 are covered with 8 respectively, and then the wire 6 protruding outside the cup 8 is wrapped around the rod-like object 11, and the rod-like object 11 is rotated to move the plastic cup 8 containing the food-proof material into the nut 2 and the nut 2. Press on bolt 1 to fix it. As a result, a filled state of the anti-food material without voids is obtained, and the anti-food material is left to cure in this state. When the plastic cup 8 is firmly fixed to the nut 2 and the bolt 1, respectively, the rod 6 and the wire 6 protruding outside from the cup 8 can be cut off if necessary. From the viewpoint of aesthetics, it is desirable to cut off the surface of the plastic cup 8 when the top coating of the same coating color as the steel plate 4 is applied. If necessary, the plastic cup 8 may be removed, and then the surface of the food-proof material may be overcoated.

The rod-shaped material may be made of wood, plastic, metal or the like without particular limitation. When the container with the food protection material is pressed against the bolts and nuts, the food protection material protruding from the container may be removed with a spatula or the like.

[0016]

EFFECTS OF THE INVENTION According to the method of the present invention, with respect to the bolts and nuts located on the bottom of the bridge girder of a bridge, etc., even when working at a high place, the covering work with the container containing the foodstuff can be performed easily and reliably. Can be done.

[Brief description of the drawings]

1 (a) to 1 (a '') and 1 (b) to 1 (b '') are schematic process diagrams showing an embodiment of the method of the present invention.

[Explanation of symbols]

 1: Nut 2: Bolt 3: Washer 4: Steel plate 5: Pitch part 6: Stainless steel wire 7: Stainless steel stopper 8: Plastic cup 9: Hole 10: Anti-food 11: Rod

Claims (1)

[Claims] 1. A bolt portion and / or exposed in a structure
Alternatively, a method of encapsulating the nut part with a container filled with food-proof material, in which a work line is fixed to the bolt part and / or the nut part, and then the work line is passed through a container encapsulating the part. A hole is provided at the bottom, and the wire is passed from the inside to the outside of the container through the hole of the container, and then the container is filled with the food-proof material, and the container containing the food-proof material is wrapped around the bolt part and / or the nut part. Covering, and then winding a work line extending outside of the container around a rod-shaped object, and rotating the rod-shaped object to fix the container with food protection to the bolt portion and / or the nut portion, and Anti-corrosion coating method for nut part.