JP2002004317A - Steel lid connecting structure for buried box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the outside diameter of a buried box by improving the space efficiency of the box by expanding the effective inside diameter of a steel lid receiving frame section with respect to its outside diameter and the effective working space of the box with respect to the installed area of the box and, at the same time, to make the maintenance and inspection work of underground equipment easier. SOLUTION: A projecting section 31 is formed on the inner peripheral surface of the buried box and a nearly vertical engaging groove 35 is formed on the projecting section 31. One end section of a rod-like connecting member 33 is rotatably and slidably connected to the groove 35 and the other end section of the member 33 is rotatably connected to the peripheral edge section of a steel lid 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron cover connecting structure in a buried case in which an iron cover fitted and supported on an upper end portion of a buried case buried underground is openably and closably connected to the buried case.

[0002]

2. Description of the Related Art In particular, laying pipes for supplying water, gas, electricity or the like are buried underground in an urban area or a suburb thereof. Control valves such as water control valves, connectors, breakers, etc. are appropriately connected to these laying pipes, and these can be operated from the road surface, maintained and inspected, and these are protected and the installation locations are clearly specified. There is a need to. For that purpose, iron housing (buried housing)
Such hollow structures are installed underground. In addition, even in a manhole, a similar hollow structure (buried casing) may be installed underground.

[0003] At the upper end of a buried case buried underground, an iron cover receiving frame portion for fitting and supporting an iron cover is provided.
The iron lid is mounted on the receiving frame so that it can be opened and closed from the ground. The iron lid receiving frame may be formed integrally with the buried case, or may be formed separately and fixed to an upper end portion of the buried case with a bolt or the like. It is applicable to any of them. In this case, the upper surface of the iron cover receiving frame portion is buried so as to have substantially the same height as the road surface, and the inner surface of the iron cover receiving frame portion is formed such that the upper surface thereof is substantially flush with the road surface. Is supported in a fitted state (closed state). The iron cover is generally openably and closably attached to the iron cover receiving frame via a hinge means. References disclosing this type of hinge means include, for example, Japanese Utility Model Application Laid-Open No. 58-63250 (Japanese Utility Model Application Publication No. 59-35652) and Japanese Patent Application Laid-Open No. 63-83323.
(Japanese Patent Publication No. 4-6820).

[0004]

However, in the conventional iron-lid connecting structure, the connecting rod connecting portion (bow number receiving portion) on the iron-lid receiving frame side protrudes inside the iron-lid fitting support portion. Since the effective inner diameter of the iron lid receiving frame portion is reduced, work for maintenance and inspection of control valves such as water control valves or devices such as connectors and breakers buried underground becomes difficult. There was a technical problem to be solved that became difficult. Also, when trying to increase the effective inner diameter of the iron cover receiving frame portion in order to facilitate maintenance and inspection work, the outer diameter of the iron cover receiving frame portion becomes unnecessarily large, and the embedded housing becomes large, There is also a technical problem to be solved that the installation space of the buried case becomes large and the space efficiency is greatly reduced. In other words, in the conventional buried case, the outer diameter of the iron cover receiving frame of the upper main body is unnecessarily large because the outer diameter projects radially in proportion to the size of the effective inner diameter. The ratio of the effective inner diameter of the iron cover receiving frame portion to the diameter (maximum diameter) has become smaller and smaller, and the effective working space has a smaller area with respect to the installation area of the buried case, resulting in lower space efficiency.

The present invention has been made in view of such technical problems, and an object of the present invention is to provide a simple structure having a small number of parts and a small number of processing steps, and an effective use of an iron cover receiving frame portion with respect to an outer diameter. The inner diameter can be enlarged, and even if the outer periphery of the iron cover receiving frame part of the buried case is almost straight in the vertical direction, a sufficient effective inner diameter can be secured, so the outer diameter is minimized and slimmed down The effective working space for the installation area of the buried enclosure can be expanded to increase the space efficiency, and the maintenance and inspection work for devices such as water control valves installed underground can be facilitated. An object of the present invention is to provide an iron lid connecting structure in a buried case.

[0006]

Means for Solving the Problems The present invention (claim 1) provides:
In order to achieve the above object, an iron lid fitted and supported by an iron lid receiving frame provided at the upper end of a hollow buried case buried underground is connected to the inside of the buried case so as to be openable and closable by a connecting member. In the iron lid connecting structure in the embedded housing, an overhang is formed on a part of the inner peripheral surface below the iron lid receiving frame portion of the embedded housing, and an engagement groove extending substantially vertically in the overhang is formed. Forming, one end of the connection member is rotatably and slidably engaged with the engagement groove, and the other end of the connection member is rotatably engaged with the iron cover, An iron lid is connected to the buried case so as to be openable and closable.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the outer peripheral surface of the buried case has a cylindrical shape having substantially the same diameter in the vertical direction. The screw engagement between the hollow cylindrical upper body provided with the iron lid receiving frame portion and the hollow cylindrical lower body installed underground,
A configuration in which the height of the upper body is adjustable by rotating the upper body with respect to the lower body, wherein an opening is formed at an upper end of the engagement groove; The other end of the connecting member is configured to be detachably attached to the engagement groove through the opening, or the other end of the connecting member is engaged with the iron lid in a retaining state. The above object is efficiently achieved.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic vertical sectional view showing an iron cover closed state of an embodiment of a buried case to which the present invention is applied, and FIG. 2 is a schematic plan view of the buried case shown in FIG. is there. In FIGS. 1 and 2, a concrete or brick or the like is provided near an upper part of a buried device 11 such as a control valve (water control valve, gate valve, etc.) provided in the middle of a laying pipe 10 for water, gas or electricity. A seat 12 is embedded, and a hollow cylindrical lower body 13 is supported on the seat 12. In the illustrated example, the lower main body 13 is installed underground by fixing a flange portion 21 formed at an intermediate height portion of the outer peripheral surface to the seat base 12 with bolts or the like.

The lower main body 13 has a hollow upper main body 1.
6 are connected by screw engagement. That is, an outer screw 17 is formed in a range of a predetermined height from a lower end of the upper main body 16, and an inner screw 1 is formed on an inner peripheral surface of the lower main body 13.
The upper body 16 is formed by screwing the outer screw 17 to the inner screw 15 to thereby form the lower body 1.
3 is connected to a height adjustable (up and down position adjustable). The lower body 13 and the upper body 16 constitute a buried case, and the lower part of the buried case is provided with the water control valve 1.
A space 14 for accommodating devices such as 1 is formed.

The upper end of the upper body 16 is substantially at the same height as the road surface 18, and an iron lid receiving frame 19 is formed at the upper end. The iron cover receiving frame 19 includes a road surface 18.
The iron lid 20 is opened and closed so that it is approximately the same height as (
It is fitted and supported in a possible state. Thus, as shown in FIGS. 1 and 2, the outer periphery of the hollow cylindrical upper main body 16 having the iron lid receiving frame portion 19 for fitting and supporting the iron lid 20 at substantially the same height as the road surface 18 at the upper end portion is provided. The outer screw 17 is formed on the surface, the inner screw 15 is formed on the inner peripheral surface of the hollow cylindrical lower main body 13 installed underground, and the outer screw 17 is screw-engaged with the inner screw 15. A buried case is configured such that the height of the upper body is adjusted by rotating the upper body 16. The upper main body 16 and the lower main body 13 have a cylindrical shape at least in the range of the screw engaging portions 15 and 17, but are limited to a cylindrical shape in other portions such as the iron lid receiving frame portion 19. Instead, various other cross-sectional shapes such as a rectangle and a polygon may be used.

In FIG. 1 and FIG. 2, the buried case in this embodiment is composed of a lower body 13 and an upper body 16 which are screwed so as to be able to adjust the vertical position as described above. An openable and closable connection via an iron cover connection structure (hinge mechanism) 30 having a connection member 33 provided between the inner surface of the iron cover and the inside of the buried case (in the illustrated example, the inside of the upper main body 16). Have been. A jig engaging hole 41 is formed at a position (a position on the opposite side in the diameter direction) of the iron lid 20 opposite to the iron lid connection structure 30. The jig engaging hole 41 is opened by opening and closing the iron lid 20 by inserting and engaging the tip of an opening and closing jig (not shown), lifting the iron lid, and rotating the iron lid on a road surface. It is for closing the iron lid opened together with the original state. With such a structure, a hollow buried casing 13 buried underground,
An iron lid connection structure 30 in a buried case that connects the iron lid 20 fitted and supported by the iron lid receiving frame portion 19 provided at the upper end of the opening 16 to be openable and closable by a connecting member 33 is formed. I have.

FIG. 3 is a partially enlarged longitudinal sectional view showing the iron lid connecting structure 30 in FIG. 1 in a state where the iron lid is closed, and FIG. 4 shows the iron lid connecting structure 30 in FIG. FIG. 5 is a partially enlarged longitudinal sectional view showing the upper body 16 in FIG.
FIG. 6 is a plan view showing only the upper main body 16 taken along the line 6-6 in FIG. Next, the iron lid connection structure 30 will be described in detail with reference to these drawings. In FIGS. 3 to 6, a part of the inner peripheral surface on the lower side of the iron lid receiving frame portion 19 of the buried case (the upper main body 16 in the present embodiment) has a radially inward portion extending over a predetermined length in the vertical direction. An overhanging portion 31 is formed, and the overhanging portion 31 is formed with an engagement groove 35 extending substantially vertically.

FIG. 7 is a partial longitudinal sectional view showing a portion of the upper main body 16 where the overhang portion 31 is formed along a line 7-7 in FIG. 8, and FIG. 8 is a sectional view taken along a line 8-8 in FIG. Overhang part 3 which we saw
1 is a front view of FIG. As shown in FIG. 8, the overhanging portion 31 is formed of two overhanging portions formed at predetermined intervals in parallel in the up-down direction, and the engagement grooves 35 are opposed to each other. It is formed on the surface (inward surface). The lower end of the rod-shaped connecting member 33 having a predetermined length is slidably and rotatably connected (engaged) with an engaging pin portion 36 protruding from both sides thereof into each of the engaging grooves 35. ing. An open portion 37 is provided at the upper end of the engagement groove 35.
Are formed. The opening 37 is connected to the connecting member 3.
The upper end 3 (the engaging pin portion 36) is made detachable from the engaging groove 35. That is, the connecting member 33 is connected to the engaging groove 3 through the opening 37.
5 is detachably connected to the lock 5.

On the other hand, the upper end of the connecting member 33 is rotatably connected to a peripheral edge of the inner surface of the iron cover 20 via a pin fulcrum (shaft supporting pin) 34. The connecting member 3
3 is connected to the iron cover 20 by, for example, engaging pin portions projecting from both sides of the upper end of the connecting member into a long hole (or groove) formed in the iron cover 20 in a retaining state. In this case, a structure in which the members are rotatably connected may be adopted. In this manner, the iron cover 20 can be opened and closed between a closed state as shown in FIG. 3 and an open state as shown in FIG. Part of a buried enclosure)
It is connected so that opening and closing is possible.

In FIG. 1 to FIG. 8, the upper main body 16 constituting the buried casing has a cylindrical shape whose outer peripheral surface has substantially the same diameter in the vertical direction. The outer diameter of the lid receiving frame 19 is set to the minimum outer diameter with respect to the effective inner diameter. In other words, there is no need to provide a connecting member (hinge metal fitting) engaging shelf projecting inward in the radial direction from the iron cover receiving frame portion in the conventional example. In the example, it is not necessary to form a bulge bulging outward in the radial direction at the upper end of the upper body 16).
The outer diameter of 6) can be minimized and made substantially straight, so that the installation space of the buried case can be reduced and the space efficiency can be improved.

According to the embodiment described above, the iron cover fitted and supported by the iron cover receiving frame provided at the upper end of the hollow buried case buried underground is connected to the connecting member inside the buried case. In the iron lid connection structure in the buried case that can be opened and closed with
A projecting portion 31 is formed in a part of the inner peripheral surface below the iron lid receiving frame portion 19 of the buried case (upper body 16), and an engaging groove 35 extending substantially vertically is formed in the projecting portion. One end of the connecting member 33 is rotatably and slidably engaged with the engagement groove 35, and the other end of the connecting member is rotatably engaged with the iron cover 20. Since the lid is configured to be openably and closably connected to the buried case, the effective inner diameter of the iron lid receiving frame portion 19 with respect to the outer diameter can be increased with a simple structure having a small number of parts and processing steps, Even if the outer periphery of the iron cover receiving frame portion 19 of the buried case is made substantially straight in the vertical direction, a sufficient effective inner diameter can be secured, so that the outer diameter can be minimized and the slimness can be reduced. To increase the effective working space for the installation area of the equipment and increase the space efficiency Can, iron lid connecting structure in buried enclosure which can be facilitated maintenance and inspection work on device 11 of the water control valve or the like which is installed in the ground is provided.

In the above-described embodiment, the buried case is formed by screwing the hollow cylindrical upper body 16 provided with the iron lid receiving frame 19 and the hollow cylindrical lower body 13 installed underground. In the above, an example in which the height of the upper body is adjustable by rotating the upper body 16 with respect to the lower body 13 has been described as an example. The lid connection structure can be similarly applied to a case where the buried case is constituted by one hollow case, and furthermore, a case where the buried case is constituted by three or more hollow cases. An effect can be obtained. When the buried case is formed of a single hollow case, the cross-sectional shape may be any shape such as a rectangle, various polygons, and an oval in addition to a circle. Further, in the above-described embodiment, as the buried case, an external screw is formed on an upper body provided with an iron lid receiving frame portion, and an internal screw is formed on a lower body installed underground.
Although a configuration in which the lower main body is configured as an outer cylindrical body is adopted, the present invention forms an internal screw in the upper main body provided with the iron lid receiving frame portion, and an external screw is formed in the lower main body installed underground. And the present invention can be applied to a buried case in which the upper main body is formed as an outer cylindrical body, and the same operation and effect can be achieved.

[0018]

As is apparent from the above description, according to the present invention (claim 1), it is fitted and supported by the iron lid receiving frame provided at the upper end of the hollow buried case buried underground. An iron cover connecting structure for connecting the iron cover to the inside of the buried housing so as to be openable and closable by a connecting member, wherein a protruding portion is provided on a part of an inner peripheral surface below the iron cover receiving frame portion of the buried housing. Forming an engaging groove extending in a substantially vertical direction in the overhang portion, and one end of the connecting member is rotatably and slidably engaged with the engaging groove. The other end is rotatably engaged with the iron cover, and the iron cover is connected to the buried case so as to be openable and closable. The effective inner diameter of the iron lid receiving frame part can be enlarged with respect to the dimensions, and the outer circumference of the iron lid receiving frame Even if the shape is almost straight in the vertical direction, a sufficient effective inner diameter can be secured, so that the outer diameter can be minimized and slimmed down, and the effective working space for the installation area of the buried enclosure is expanded and space is increased. Provided is an iron lid connection structure in a buried case capable of improving efficiency and facilitating maintenance and inspection work on devices such as a water control valve installed underground.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the outer peripheral surface of the buried casing has a cylindrical shape having substantially the same diameter in the vertical direction. The housing screw-engages a hollow cylindrical upper body provided with the iron lid receiving frame portion and a hollow cylindrical lower body installed underground, and rotates the upper body with respect to the lower body. A structure that is a hollow structure capable of adjusting the height of the upper body by allowing the opening to be formed at the upper end of the engagement groove,
Because one end of the connecting member is detachable from the engaging groove through the opening, or the other end of the connecting member is engaged with the iron lid in a retaining state. The above effects can be more efficiently achieved.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing an iron cover closed state of an embodiment of a buried case to which the present invention is applied.

FIG. 2 is a schematic plan view of the embedded housing of FIG. 1 as viewed from line 2-2.

FIG. 3 is a partially enlarged longitudinal sectional view showing the iron lid connection structure in FIG. 1 in a state where the iron lid is closed.

4 is a partially enlarged longitudinal sectional view showing the iron lid connection structure of FIG. 3 in a state where the iron lid is opened.

FIG. 5 is a longitudinal sectional view showing only an upper main body in FIG. 1;

FIG. 6 is a plan view of only the upper main body viewed from line 6-6 in FIG. 5;

FIG. 7 is a partial longitudinal sectional view showing a portion where an overhang portion of the upper main body is formed along a line 7-7 in FIG. 8;

FIG. 8 is a front view of the overhang as viewed from line 8-8 in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Embedded apparatus 13 Lower main body 14 Equipment storage space 15 Inner screw 16 Upper main body 17 External screw 18 Road surface 19 Iron lid receiving frame part 20 Iron lid 30 Iron lid connection structure 31 Overhang part 33 Connection member 35 Engagement groove 36 Engagement pin part 37 Open part 41 Jig engagement hole

Claims (5)

[Claims] 1. A buried state in which an iron cover fitted and supported by an iron cover receiving frame provided at an upper end of a hollow buried case buried underground is connected to the inside of the buried case so as to be openable and closable by a connecting member. In the iron lid connecting structure in the case, an overhang portion is formed on a part of the inner peripheral surface below the iron cover receiving frame portion of the buried case, and an engagement groove extending substantially vertically is formed in the overhang portion. An end of the connecting member is rotatably and slidably engaged with the engagement groove, and the other end of the connecting member is rotatably engaged with the iron cover; Is connected to the buried case in an openable and closable manner. 2. The iron lid connection structure according to claim 1, wherein the outer peripheral surface of the buried case has a cylindrical shape having substantially the same diameter in a vertical direction. 3. The buried casing screw-engages a hollow cylindrical upper main body provided with the iron lid receiving frame portion and a hollow cylindrical lower main body installed underground. The iron lid connection structure according to claim 1 or 2, wherein the structure is a hollow structure that can adjust the height of the upper body by rotating the upper body. 4. An opening according to claim 1, wherein an opening is formed at an upper end of said engaging groove, and one end of said connecting member is detachable from said engaging groove through said opening. An iron lid connection structure in the buried case according to any one of the above. 5. The iron lid connection structure according to claim 1, wherein the other end of the connection member is engaged with the iron lid in a retaining state. .