JPH08311910A - Hinge construction for iron cover - Google Patents

Abstract

PURPOSE: To prevent a structure bearing a hinge hardware sliding up and down from projecting largely to an opening section of a holding frame. CONSTITUTION: A thread groove 5 having slippage stopping pieces 6 on both right and left thereof with a cover holding surface as the upper end and with the upper end of the slippage stopping pieces 6 as a blind 7 is formed on a side wall of the internal circumferential surface of the iron cover holding frame in the vertical direction. A hinge harware 3 having pins 8 capable of sliding the slippage stopping pieces 6 on both right and left of the lower end as a separate body is incorporated thereinto from the lower end to be released, and the upper end of the hinge hardware 3 is pivoted on a cut groove formed on one side of a cover body of the separate body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to water and sewerage systems, gas pipelines,
For iron lids used for maintenance of underground cables and other iron lids,
The present invention relates to a hinge structure for an iron lid in which a receiving frame and a lid are connected and the lid can be opened and closed 180 degrees.

[0002]

2. Description of the Related Art Conventionally, the structure described in Japanese Utility Model Publication No. 50-39025, that is, a receiving plate is shelved on one side of the inner circumference of a receiving frame to open a circular hole, and a cylindrical groove is formed in one side of a lid. The structure in which the upper end of the leg is pivotally attached and the lower part is passed through the hole from above and the engaging rod is provided below the leg while keeping a space between the lower surface of the receiving plate is used.

[0003]

SUMMARY OF THE INVENTION The main object of the present invention is that, especially in a small-diameter iron lid, the projection of the shelf plate installed in the conventional hinge structure violates the effective opening. It is a technical problem to be solved to make the structure smaller or not when viewed from above.

[0004]

[Means for Solving the Problems] A technical means for solving the above-mentioned problems includes a side wall of an inner peripheral surface of an iron lid receiving frame, a vertical direction, and a retaining piece on the left and right with a lid receiving surface as an upper end, and A hinge groove having a blind upper end of the retaining piece is constructed, and a hinge metal having a separate lower end on which a pin for sliding the retaining piece is slidable is incorporated into the hinge from the released lower end. The upper end of the metal object is pivotally attached to the cut groove formed on one side of the separate lid.

[0005]

In the iron lid hinge structure according to the present invention, the lower end pin of the hinge metal object slides up and down in the groove having the retaining frame engaging portion, which is pivotally attached to the upper end of the hinge metal object. The lid body can be lifted to the upper part, so that the lid body is opened and closed by 180 degrees, and the blind part at the upper end of the retaining piece serves as a stopper for the upper part of the hinge metal object.
The above-mentioned groove structure does not project much from above.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a lid, 2 is a receiving frame, 3 is a hinge metal, 4 is a lid receiving surface, 5 is a groove, 6 is a retaining piece, 7 is a blind part,
Reference numeral 8 is a pin formed at the lower end of the hinge metal fitting 3, 9 is a cut groove formed on one side of the lid body 1, and 10 is a pivotal connection portion between the lid body 1 and the upper end portion of the hinge metal fitting 3 which become a pin or the like.

[0007]

As described above, according to the present invention, as shown in FIG. 4, the structure of the present invention of (A) is different from the protruding portion of the shelving receiving plate 11 in the conventional structure of (B). Groove 12 opening 12
It can be configured without protruding to the inside, and even if it is made to project it can be of a small structure. Therefore, it can be used as an effective opening for water supply valve casings, gas valve casings, etc. with relatively small opening dimensions. It is possible to ensure that the structure can be carried in and out of equipment such as equipment from the opening in a large iron lid, and it can be implemented without providing a projection in the opening. .

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of an entire closed state in which the present invention is implemented.

FIG. 2

FIG. 2 is a side sectional view of the lid of FIG. 1 in an open state.

3 is a partial cross-sectional perspective view of a receiving frame groove portion that is a main part of FIG.

FIG. 4A is a top view of a receiving frame embodying the present invention. (B) A top view of a receiving frame having a conventional structure.

[Explanation of symbols]

1, lid 2, receiving frame 3, hinge hardware 4, lid receiving surface 5, groove 6, retaining piece 7, blind portion 8, pin 9, kerf 10, pivot portion 11, receiving plate 12, opening portion

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

[Procedure amendment]

[Submission date] November 16, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of an entire closed state in which the present invention is implemented.

FIG. 2 is a side sectional view of the lid of FIG. 1 in an open state.

3 is a partial cross-sectional perspective view of a receiving frame groove portion that is a main part of FIG.

FIG. 4A is a top view of a receiving frame embodying the present invention. (B) A top view of a receiving frame having a conventional structure.

[Explanation of reference numerals] 1, lid 2, receiving frame 3, hinge hardware 4, lid receiving surface 5, groove 6, retaining piece 7, blind portion 8, pin 9, kerf 10, pivot portion 11, receiving plate 12 ,Aperture

Claims (1)

[Claims] 1. A side wall of an inner peripheral surface of an iron lid receiving frame is provided with a stopper groove on the left and right with a lid receiving surface as an upper end in the longitudinal direction, and a groove is formed which makes the upper end of the stopper piece blind. , A hinge metal having left and right pins that make the retaining piece slidable at the lower end that is a separate body is incorporated from the opened lower end, and the upper end of the hinge metal is
A hinge structure for an iron lid, which is pivotally attached to a groove formed on one side of a separate lid body.