JPH083702Y2 - Rust prevention cap at the fastening part - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rust preventive cap for a fastening portion, which has a function of mainly protecting the fastening portion of a structure, which is maintained in a fastened state for a long period of time.

[0002]

2. Description of the Related Art Conventionally, for example, in a mounting portion of a roof support structure and a slate in a slate roof structure, a method of mounting the slate to the roof support member by using hook bolts has been adopted. In this fastening portion, a nut is usually fastened to the screw shaft portion of the hook bolt on the surface side of the slate via a packing and a washer. And
The hook bolt that is generally used has a hook position that is fixed because the slate is overlapped and fixed at the splice part and the hooking position is not uniform at the slate fastening part due to the structure of the roof support member. different. The length of the hook bolt used in such a relationship is longer than necessary.

As a result, the threaded portion of the bolt protruding from the nut position after fastening becomes long, and the exposed threaded portion of the bolt rusts when the roof is changed due to damage to the slate, rain leaks, etc. Becomes difficult. Therefore, it has been attempted recently to cover the fastening portion with a cap after the slate reshuffling or repair work to protect it from direct exposure to wind and rain.

[0004]

[Problems to be Solved by the Invention] However, even if only the above-mentioned cap is temporarily effective, the screw part of the bolt will be corroded by rainwater or harmful gas entering the cap for a long time. And is not very effective. Particularly in the case of a slate roof, the surface is rough, and even if a cap is attached, a gap is created between the cap and the roof surface, it is impossible to make a sealed state, and rainwater flowing on the roof is drawn in. If it remains inside, it will be vaporized inside under the influence of outside air during fine weather, which will promote the corrosive action of the screw part.

In the present invention, in order to solve such a problem, a rust preventive means is provided inside the cap body which can be fitted into the fastening portion, and at the same time, a sealing effect can be obtained in the mounting portion, which enables a long-term It is to provide a rustproof cap for a durable fastening part.

[0006]

In order to achieve such an object, the present invention provides a non-drying fluidity inside a synthetic resin cap body having a shape capable of being fitted into an exposed screw portion at a fastening portion. Is provided with a rust preventive agent, a flexible protective layer covering the surface of the rust preventive agent is provided in the opening of the cap body, and the surface of the flexible protective layer is covered with a protective sheet, At the time of use, the protective sheet is removed, and the fastening portion is pressed and attached so that the flexible protective layer is broken.

[0007]

In the rust preventive cap of the present invention having the above-mentioned structure, the cap main body is made of synthetic resin in an unused state, and the inside of the rust preventive cap is filled with a non-drying and fluid rust preventive agent. Further, since the surface thereof is covered with the flexible protective layer, the rust preventive agent for the contents has storage stability that can be maintained in a stable state. Therefore, there is no inconvenience until use. At the time of use, as described above, the protective sheet covering the surface of the flexible protective layer is removed, the opening of the cap body is applied to the intended fastening portion, and the flexible protective layer is pressed so as to be broken. Since the fastening part is received in the rust preventive agent inside, in other words, the exposed screw part is covered with the rust preventive agent, and at the same time, the flexible protective layer is accepted in the rust preventive agent. Since the sealing effect is exhibited by closely adhering to the outer peripheral portion of the fastening portion, it is possible to prevent and protect the rust preventive agent for a long period of time.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the rust preventive cap of the fastening portion of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged vertical sectional view of a rust preventive cap used in a fastening portion of a mounting bolt nut of a slate roof. FIG. 2 is a sectional view showing a usage state.

In FIG. 1, the cap body 1 is made of, for example, polyethylene resin, the screw protecting portion 2 has a small diameter, the nut protecting portion 3 has a diameter that covers the outer shape of the nut, and further covers the washer and packing. In addition, the base portion 4 has a large size, and the peripheral edge portion 5 is formed in a reverse waveform so as to cope with a slate wave. The inside of the opening 6 in the cap body 1 having such a shape is filled with the rust preventive agent 10 to a position slightly lower than the minimum height H of the opening 6, and the upper surface of the rust preventive agent 10 (opening 6 is described above), a flexible protective layer 15 is formed, and a protective sheet 16 having a release layer is attached to the surface of the flexible protective layer 15. .

As the rust preventive agent 10, it is preferable to use, for example, an asphalt emulsion mixed with inorganic fibers. As this asphalt emulsion, water + asphalt (50/50) is used, and about 90% of this asphalt emulsion (expressed in weight%, the same applies below) and about 10% of rock wool and additives (for example, defoamer, Those which are non-drying using a thickener and the like and have appropriate fluidity when the cap is not used are preferable. The composition of the rust preventive agent is not limited to the above ratio.

As the flexible protective layer 15, for example, about 85% of asphalt, about 10% of rubber and about 5% of non-drying oil as an additive are added, and the viscosity is high and the viscosity can be maintained for a long time. The thing of the nature is used. The flexible protective layer 15 is formed into a thin sheet, and the cap body 1
The rust preventive agent 10 is cut into a size that matches the inner diameter of the opening 6 of the
The peripheral edge is provided so as to overlap the upper surface of the layer and adhere to the inner peripheral surface of the opening 6 of the cap body 1 at the peripheral edge.

The rust preventive cap having the above-mentioned structure is a rust preventive agent filled in the cap body 1 in a normal stage.
Since the opening 10 is covered with a flexible protective layer 15 which is impermeable to air in the opening 6, it is stored in a stable state unless otherwise affected. In short, since the rust preventive agent 10 is a water-soluble material as described above, the solvent does not vaporize to become a solid content, in other words, it can be stored without solidification.
Therefore, it can be attached to the intended place without any problem during use.

To use this rustproof cap, as shown in FIG. 2, for example, the mounting screw portion 20 of the slate roof 30 is used.
When the protective sheet 16 is peeled off, the non-drying flexible protective layer 15 is exposed.
If 15 is pressed against the mounting screw portion 20, first the flexible protective layer 15 is broken and the screw portion 20 of the bolt is attached to the cap body 1.
By rushing into the soft rust preventive agent 10 inside and pressing the cap body 1 until the peripheral edge portion 5 contacts the surface of the slate roof 30, the screw portion 20 is easily inserted into the screw protection portion 2 of the cap body 1, and The nut 21 part is housed in the nut protection part 3. At this time, since the rust preventive agent 10 is in a state in which the inorganic fibers are appropriately mixed and carry the asphalt emulsion as described above, the flexible protective layer 15 does not leak to the outside due to the spreading breakage, and Since the flexible protective layer 15 is made of rubber and has an adhesive property on the surface, a rust preventive agent inside
With a volume change of 10, it will adhere to the slate surface by the pushing force in the outward direction.

As a result, the inside and outside of the cap are completely shut off, and the threaded portion 20 and the nut 21 of the bolt are protected by the rust preventive agent 10.
With the covering effect of the flexible protective layer 15, and the sealing effect of the flexible protective layer 15, the rust preventive agent 10 can protect the screw portion 20 while maintaining the softness peculiar to asphalt without solidifying for a long period of time.

Although the above description has been made for the fastening portion of the mounting bolt of the slate roof, it can be used for a bolt having a large diameter. For example, for tightening or removing a bolt nut for bridge or other maintenance. It can be used to protect the screw part at the place where In this case, the shape of the screw protection portion shown in the above figure may be changed according to the usage state. In addition, if the use location is flat, the peripheral edge of the opening may be adjusted to the same height.

Further, as the rust preventive agent, a viscous substance such as aqueous putty may be used in place of the asphalt emulsion as described above. Alternatively, grease (however, it is desirable that its melting temperature is higher than general ones) can be used as the rust preventive agent.

[0017]

[Effect of the Invention] As described above, the rust preventive cap of the present invention is
It has storage stability and does not lose the protective function of the fastening part by hardening the rust preventive stored in the cap even if it is used for a long period of time, and also has a sealing function with the mounting surface. It can withstand long-term use and reliably protect the fastening part. In addition, it can be provided at a low cost with a simple structure, and the economy is remarkable.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of a rust preventive cap of the present invention used at a fastening portion of a bolt nut for mounting a slate roof.

FIG. 2 is a cross-sectional view showing a usage state.

[Explanation of symbols]

 1 Cap Main Body 2 Screw Protecting Part 3 Nut Protecting Part 4 Base Part 5 Peripheral Part 6 Opening Part 10 Rust Preventive Agent 15 Flexible Protective Layer 16 Protective Sheet 20 Screw Part 21 Nut 30 Slate Roof

Claims (4)

[Scope of utility model registration request] 1. A non-drying and fluid rust preventive agent is filled inside a synthetic resin cap body having a shape capable of being fitted into an exposed threaded portion at a fastening portion, and the opening of the cap body is aforesaid. provided a flexible protective layer covering the surface of the anticorrosive agent, the surface of the flexible protective layer is covered with a protective sheet together
In addition, the protective sheet should be removed before use.
Install by pressing the fastening part so that the protective layer is broken.
A rustproof cap for the fastening part that is characterized by being 2. The rust preventive cap for a fastening portion according to claim 1, wherein the rust preventive agent is an asphalt emulsion in which inorganic fibers are mixed. 3. The rust preventive cap for a fastening portion according to claim 1, wherein the rust preventive agent is an oily viscous substance. 4. The rust preventive cap for a fastening portion according to claim 1, wherein the flexible protective layer is a thin layer containing asphalt as a main component and kept in a non-drying state.