JP3060205U - Assembling step - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling step which does not require any trouble in assembling, can easily adjust a protruding amount from the inner surface of a concrete cylinder, and has excellent electric insulation. SOLUTION: In an assembling step which is formed in a substantially U-shape by a pair of support rods and a scaffolding material connected to one end of the support rods, the support rods are composed of headed bolts, A cylindrical spacer is inserted into the headed bolt penetrating the scaffold, and a screw portion near the other end is screwed into an insert embedded in a concrete cylinder.

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step to be mounted on a wall of a concrete product, and more particularly to a step which can be easily mounted inside a hollow concrete box such as a manhole or a handhole.

[0002]

2. Description of the Related Art An example of this type is disclosed in Japanese Patent Application Laid-Open No. 9-13408 (see FIG. 4). That is, this is an assembling step in which a pair of columnar support rods 21 and a scaffold 22 connecting one end of these support rods are assembled in a substantially U-shape. The other end of the support rod has a male screw 23 that can be inserted into the insert 10 embedded in the inner wall surface of the concrete box, and has a substantially flat support surface 26 extending in the circumferential direction of the support rod. It has. When the male screw 23 of the support rod is screwed into the insert 10, the support surface 26 comes into close contact with the inner wall surface.

At the time of assembling, first, the male screw 23 of the support rod 21 is screwed into the insert 10 via the washer 35, and then the locking nut 31 is screwed into the male screw 24, and the scaffold 22 is screwed through the washer 32. And the bag nut 33 was screwed into the protruding male screw 24.

[0004]

[Problems to be Solved by the Invention] Therefore, it takes a lot of time and labor to assemble, and the projecting amount of the scaffold from the inner surface of the concrete cylinder cannot be adjusted. Therefore, various types of steps must be prepared according to the amount of protrusion. Moreover, most of the steps have exposed metal surfaces, which was even dangerous, especially for electrical wiring.

[0005] The present invention solves the above-mentioned problems, and provides an assembling step that can easily adjust the amount of protrusion from the inner surface of the concrete cylinder without assembling, and has excellent electrical insulation. Aim.

[0006]

Means for Solving the Problems In order to solve the above problems, the configuration of the present invention is as follows. That is, in the first configuration, in the assembling step constituted by a pair of support rods and a scaffolding material connected to one end of these support rods, the support rods are head-shaped. A cylindrical spacer is inserted into the bolt with a head, which penetrates the scaffold, and the screw near the other end is screwed into an insert embedded in a concrete cylinder. is there.

[0007] A second configuration is such that in a prefabricated step constituted by a pair of support rods and a scaffold connected to one end of these support rods in a substantially U-shape, the support rods are provided with a head. A cylindrical spacer is inserted into the headed bolt made of a bolt and penetrated through the scaffold, and a screw portion near the other end is screwed into an insert embedded in a concrete cylinder. The material is provided with an electrically insulating coating, the spacer is made of an electrically insulating material, and an insulating cap is fitted to the head of the headed bolt.

[0008] A third configuration is that, in a pre-assembled step constituted by a pair of support rods and a scaffold connected to one end of these support rods, the support rods are provided with a head. A cylindrical spacer is inserted into the headed bolt made of a bolt and penetrated through the scaffold, and a screw portion near the other end is screwed into an insert embedded in a concrete cylinder. The material is provided with a transparent coating, and the spacer is made transparent.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described based on an embodiment shown in the drawings. FIGS. 1, 2 and 3 show an assembly step constructed in a substantially U-shape by a pair of support bars 2, 2 and a scaffold 1 connected to one end of these support bars. ing. The support rod 2 is composed of a headed bolt having a shaft 2a and a head 2b. A cylindrical spacer 3 is inserted into the headed bolt 2 that has penetrated the scaffold 1, and a screw near the other end is concrete. It is screwed into the insert B embedded in the cylinder A. The scaffold 1 is provided with an electric insulating coating 1a made of a synthetic resin, the spacer 3 is made of an electric insulating material made of a synthetic resin, and the head 2b of the head bolt is provided with an insulating cap 4 made of a synthetic resin. Is fitted.

When the covering of the scaffold 1a and the spacer 3 are made transparent, it is possible to externally observe whether the core is corroded. In addition, the material of the core material (for example, steel or stainless steel) can be immediately identified. In addition, the dimensions of the core material, especially its thickness, can be confirmed, and the thickness has the most significant effect on the strength.

The present invention is not limited to the above-described embodiments and embodiments, and includes various modifications without departing from the spirit and scope of the utility model registration request.

[0012]

[Effects of the Invention] With the first configuration of the present invention, the steps are not required to be assembled. Also, by changing the length of the spacer, the amount of screwing of the headed bolt into the insert can be changed, and the amount of protrusion from the concrete cylinder inner surface can be easily adjusted.

According to the second configuration of the present invention, the assembling of the steps is not troublesome, and by changing the length of the spacer, the amount of screwing of the headed bolt into the insert is changed, so that the space from the inner surface of the concrete cylinder is reduced. The amount of protrusion can be easily adjusted, and the electrical insulation of the entire step can be secured.

According to the third configuration, the assembling of the steps does not take much trouble, and the length of the spacer is changed, so that the screwed amount of the headed bolt into the insert is changed, and the protrusion amount from the inner surface of the concrete cylinder is changed. Can be easily adjusted. Since the electrical insulation of the entire step can be ensured and the resin coating is transparent, it can be observed from the outside whether the core material is corroded or not, and the material of the core material (for example, steel, stainless steel, etc.) ) Can be immediately identified. In addition, the dimensions of the core material, especially its thickness, can be checked, and the thickness has the most significant effect on the strength.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a front view of one embodiment of the present invention.

FIG. 3 is a right side view of the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List A concrete cylinder B insert 1 scaffold 1a electrical insulating coating 2 support rod 2a shaft 2b head 3 cylindrical spacer 4 insulating cap 10 insert 21 support rod 22 scaffold 23 male screw 24 male screw 26 support surface 31 locking nut 32 Washer 33 Cap nut 35 Washer

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 9, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a front view of one embodiment of the present invention.

FIG. 3 is a right side view of the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a conventional technique.

[Description of Signs] A Concrete cylindrical body B Insert 1 Scaffolding material 1a Electrical insulation coating 2 Support rod 2a Shaft 2b Head 3 Cylindrical spacer 4 Insulating cap 10 Insert 21 Support rod 22 Scaffolding material 23 Male screw 24 Male screw 26 Support Surface 31 Lock nut 32 Washer 33 Cap nut 35 Washer

Claims (3)

[Utility model registration claims] 1. In a prefabricated step comprising a pair of support rods and a scaffold connected to one end of the support rods, the support rods comprise headed bolts. A tubular spacer is inserted into the headed bolt penetrating the scaffold, and a screw portion near the other end is screwed into an insert embedded in a concrete cylinder. Step. 2. The method according to claim 1, wherein said supporting rods are formed in a substantially U-shape by a pair of supporting rods and a scaffold connected to one end of said supporting rods. A cylindrical spacer is inserted into the headed bolt penetrating the scaffold, and a screw portion near the other end is screwed into an insert embedded in a concrete cylinder. Insulated coating is applied,
The assembling step, wherein the spacer is made of an electrically insulating material, and an insulating cap is fitted to a head of the headed bolt. 3. In an assembly step which is formed in a substantially U-shape by a pair of support rods and a scaffolding material connected to one end of the support rods, the support rods comprise head bolts. A cylindrical spacer is inserted into the headed bolt penetrating the scaffold, and a screw portion near the other end is adapted to be screwed into an insert embedded in a concrete cylinder, and the scaffold is transparent. Wherein the spacer is transparent.