JP2000160582A - Lower pit for underground structure and cover for underground structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lower pit for an underground structure and a cover for the underground structure capable of easily adjusting bulk. SOLUTION: A lower pit for an underground structure and a cover for the underground structure are composed of an inner cylinder body 3 and an outer cylinder body 2 vertically movably out-fitted to the upper side of the inner cylinder body 3, and plural positioning parts 4 are formed in the vertical direction on the inner peripheral surface of the outer cylinder body 2. Then, a part 5a of a positioning member 5 is installed in the positioning parts 4, and the lower end surface 5c of a residual part of the positioning member 5 abuts to the upper end surface 3a of the inner cylinder body 3 to position/support the outer cylinder body 2 on/by the inner cylinder body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower box for an underground structure and a cover for the underground structure, which can easily adjust the bulk. As used herein, the term "underground structure" refers to underground structures such as sewer pipe facilities buried underground, underground pipe facilities for water supply and gas piping, and underground facilities for power and communication. And a vertical hole-shaped structure provided to pass through.

[0002]

2. Description of the Related Art When burying a lower pit for an underground structure, it is necessary to adjust the height of a lid main body installed on an upper part of the pit main body and a road surface to the same height. For this reason, the basin body of the lower basin for the underground structure has a double structure of an outer cylinder and an inner cylinder, and the outer cylinder or the inner cylinder can be adjusted up and down, so that the It has been conventionally performed to adjust the height of a lid body and a road surface located at an upper portion of a vehicle to the same height.

As such an example, for example, Japanese Patent Publication No. Sho 63
There is one described in US Pat. In the manhole described in this publication, a height adjustment block having a fitting projection that is removably fitted into the guide groove is fitted into a base ring having a height adjustment block guide groove formed along the inner circumferential surface circumferential direction. And a lid receiving ring fitted into the base ring is placed on the height adjusting block. When adjusting the height between the upper surface of the lid placed on the lid receiving ring and the road surface by this configuration, select a height adjustment block suitable for the installation environment of the manhole and fit it into the guide groove of the foundation ring To adjust the bulk.

[0004]

However, in the manhole having the above-described structure, since the bulk adjustment is performed using the height adjustment block, a height adjustment block suitable for the installation environment is required when adjusting the bulk. . Therefore, if the installation environment is different, a height adjusting block having a different height is required, which is very inconvenient. Further, in order to finely adjust the height, various kinds of height adjustment blocks are required, and there is a problem that the number of stock parts increases.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to provide a lower cell for an underground structure and a lid for an underground structure, which can easily adjust the bulk.

[0006]

According to the present invention, a lower box for an underground structure comprises an inner cylinder and an outer cylinder which is vertically movably inserted above the inner cylinder. A plurality of positioning portions are formed vertically on an inner peripheral surface of the positioning member, a part of a positioning member is mounted on the positioning portion, and a lower end surface of a remaining portion of the positioning member abuts on an upper end surface of the inner cylindrical body. Thus, the outer cylinder is positioned and supported on the inner cylinder.

A cover for an underground structure according to the present invention has a lid body, an inner cylinder, and a frame that is vertically movably inserted above the inner cylinder and that supports the lid body at an upper end. A plurality of positioning portions are formed in the vertical direction on the inner peripheral surface of the outer cylinder, a part of a positioning member is mounted on the positioning portion, and a remaining portion of the positioning member is formed. A lower end surface is configured to abut on an upper end surface of the inner cylinder to position and support the outer cylinder to the inner cylinder.

In the above arrangement, when adjusting the height of the outer cylinder, a positioning member is fitted and mounted on an optimum positioning section among the plurality of positioning sections, and then the outer cylinder is fitted into the inner cylinder. The height adjustment of the outer cylinder can be easily performed only by using the above. Further, a part of the positioning member is fitted and mounted on the positioning portion, and the lower end surface of the remaining portion is in contact with the upper end surface of the inner cylindrical body, so that the outer cylindrical body can be reliably and firmly positioned and supported on the inner cylindrical body. it can.

The positioning member is mounted on the inner peripheral surface of the outer cylinder and is not exposed on the outer peripheral surface of the lower cell for the underground structure. ,
Even if pressure is applied to the outer peripheral surface by backfilling earth and the like, the positioning member does not come off and the positioning support is reliable. Furthermore, the lower box for an underground structure of the present invention comprises an outer cylinder, and an inner cylinder which is vertically movably inserted above the outer cylinder. A plurality of positioning portions are formed in the direction, a part of a positioning member is mounted on the positioning portion, and an upper end surface of the remaining portion of the positioning member abuts on a lower end surface of the inner cylindrical body, and the inner cylindrical body is formed. It is configured to be positioned and supported on the outer cylinder.

A cover for an underground structure according to the present invention has a cover main body, an outer cylinder, and a receiving frame portion which is vertically inserted above the outer cylinder and which supports the lid body at an upper end. A plurality of positioning portions are formed in the vertical direction on the inner peripheral surface of the outer cylindrical body, a part of a positioning member is mounted on the positioning portion, and a remaining portion of the positioning member is formed. An upper end surface abuts on a lower end surface of the inner cylinder to position and support the inner cylinder to the outer cylinder.

In the above configuration, when adjusting the height of the inner cylindrical body, a positioning member is fitted and mounted on an optimal positioning section among the plurality of positioning sections, and then the inner cylindrical body is fitted into the outer cylindrical body. The positioning of the inner cylinder can be easily performed only by using the above. In addition, since a part of the positioning member is fitted and attached to the positioning portion, and the upper end surface of the remaining portion abuts on the lower end surface of the inner cylinder, the inner cylinder can be securely and firmly positioned and supported on the outer cylinder. it can.

The positioning member is mounted on the inner peripheral surface of the outer cylinder and is not exposed to the outer peripheral surface of the lower cell for the underground structure. ,
Even if pressure is applied to the outer peripheral surface by backfilling earth and the like, the positioning member does not come off and the positioning support is reliable.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the positioning member is preferably formed in a ring shape. With such a configuration, it is possible to increase the contact area between the positioning member and the upper and lower end surfaces of the inner cylinder that comes into contact with the positioning member, and to more reliably support the positioning of the inner cylinder or the outer cylinder that is located on the upper side. It can be.

Further, in the present invention, it is preferable that the positioning portion is an annular groove formed continuously in the circumferential direction. With such a configuration, the positioning member can be securely and firmly attached to the positioning portion.

[0015]

(Embodiment 1) FIG. 1 is a partially cutaway perspective view showing an outline of a cover for an underground structure according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG. In FIG. 1, the lid 1 for an underground structure is
A lid main body, an inner cylindrical body, and an outer cylindrical body formed integrally with a receiving frame for supporting the lid main body at an upper end thereof and being externally movably mounted on the upper side of the inner cylindrical body; An annular groove 4 as a plurality of positioning portions is formed in the inner peripheral surface of the outer cylinder 2 in the vertical direction, and a positioning member 5 for positioning and supporting the outer cylinder 2 on the inner cylinder 3 is fitted in the annular groove 4. They are fitted together.

The annular groove 4 is formed over the entire circumference along the circumferential direction, and is formed in a plurality of steps at predetermined intervals (equal intervals in the embodiment) in the vertical direction. In addition, the annular groove 4
1 and 2 may be formed in a square wave shape in which the inner peripheral surface and the outer peripheral surface are bent alternately as shown in FIGS.
As shown in (1), an annular groove may be simply formed on the inner peripheral surface.
The inner cylinder 3 is placed on, for example, a bottom pedestal (not shown) installed underground, and its upper end is located at an appropriate depth from a road surface (ground). The length of the outer cylinder 2 is
Is longer than the distance from the upper end surface 3a of the
The height position of the (lid body 7) with respect to the road surface can be adjusted sufficiently. The outer cylinder 2 and the inner cylinder 3 are formed of a lightweight, inexpensive synthetic resin member such as vinyl chloride, which has corrosion resistance.

The positioning member 5 has a protruding projection 5a formed over the entire circumference, and has a ring shape that can be fitted and mounted in the annular groove 4. The projection 5a is fitted and mounted in the annular groove 4. In this state, the upper end face 5b is set at the lower end of the annular groove 4 one step above the annular groove 4, and the lower end face 5c is set at the upper end of the annular groove 4 one step below the annular groove 4. Thereby, the positioning member 5 is configured such that the convex portion 5a is
When the lower end face 5c is fitted to the inner cylindrical body 3,
Can be brought into contact with the upper end surface 3a of the entire surface. The positioning member 5 is formed of, for example, hard rubber or polyurethane rubber having flexibility and corrosion resistance, and having appropriate elasticity and hardness for facilitating attachment and detachment to the annular groove 4. .

The positioning member may be a simple flat ring 5 'as shown in FIG. In this case, the flat ring 5 ′ has a plate thickness that can be fitted and mounted in the annular groove 4, and a width thereof is set to a width obtained by adding the depth of the annular groove 4 and the thickness of the inner cylinder 3. However, as for the positioning member, in order to securely support the outer cylindrical body 2, it is preferable that the cross-sectional shape be convex as shown in FIGS. 1 and 2 in terms of strength.

The receiving frame portion 6 is formed integrally with the upper portion of the outer cylindrical body 2, and has an inner peripheral surface 6a formed as a tapered surface which slightly expands in a tapered shape facing the upper open end. Is formed with a flange 6b. The lid body 7 has an outer peripheral surface 7a.
Is a tapered surface along the inner peripheral surface 6a of the receiving frame 6, and a flange 7b having the same diameter as the flange 6b of the receiving frame 6 is formed on the outer periphery of the upper surface. A waterproof packing 8 is externally fitted to the upper end of the outer peripheral surface 7a. The lid main body 7 is formed in a dish shape with a synthetic resin member such as the above-mentioned vinyl chloride, for example, and is formed by being filled with resin or the like (not shown).

In the above configuration, when the height position of the lid main body 7 is set at the same height as the road surface, the outer cylinder 2 is slid up and down with respect to the inner cylinder 3 to the optimum height position. Set. Next, the convex portion 5a of the positioning member 5 is fitted and attached to the annular groove 4 of the outer cylinder 2 over the entire circumference. At this time, the outer cylinder 2
When the positioning member 5 is mounted with the member slightly lifted upward or with the outer cylinder 2 removed, workability is improved.
Of course, an optimum method may be selected according to the size of the outer cylinder 2 and the like.

After fitting the positioning member 5 into the annular groove 4 of the outer cylinder 2, the outer cylinder 2 is moved downward, and the lower end face 5 c of the positioning member 5 is brought into contact with the upper end face 3 a of the inner cylinder 3. Place it in contact. Thereby, the outer cylinder 2 can be easily and accurately positioned with respect to the inner cylinder 3, and the lid body 7 can be set at the same height as the road surface. Of course, as the interval between the annular grooves 4 as the positioning portion is set shorter, the height can be finely adjusted.

The annular groove 4 as a positioning portion is formed over the entire length along the circumferential direction of the inner peripheral surface of the outer cylindrical body 2 and the positioning member 5 is formed in a ring shape. 5 is an annular groove 4 for fitting and mounting over the entire length.
Fitting of the positioning member 5 with respect to
In addition, the positioning member 5 does not come off the annular groove 4.
Further, since the lower end face 5c of the positioning member 5 is placed in contact with the upper end face 3a of the inner cylindrical body 3 over its entire length, the positioning of the outer cylindrical body 2 and the inner cylindrical body 3 in the vertical direction can be performed more reliably. Will be

When the height of the road surface around the underground structure lid 1 changes after installation and the height of the lid body 7 needs to be readjusted, the positioning member 5 is removed and the optimal annular groove 4 is removed.
The positioning member 5 is fitted and mounted on the base plate. Since the positioning member 5 is detachable as described above, the bulk adjustment can be performed only by the work of removing the positioning member 5 and re-fitting and fitting into the optimal annular groove 4, and the bulk adjustment after installation can be performed. Extremely easy.

(Embodiment 2) FIG. 4 shows a second embodiment of the present invention, in which the outer peripheral surface of an inner cylindrical body 3 provided with a receiving frame portion 6 on the upper side is a cylindrical surface and the outer peripheral surface is located on the lower side. A plurality of annular grooves 4 as positioning portions are formed in the inner peripheral surface of the outer cylindrical body 2 in the up and down direction while being inserted into the cylindrical body 2 so as to be slidable in the vertical direction. The positioning member 5 has the protrusion 5 a fitted and mounted in the annular groove 4 of the outer cylinder 2, and the upper end face 5 b is in contact with and supported by the lower end face 3 b of the inner cylinder 3.

In the first and second embodiments, the positioning member 5 is formed in a ring shape and the positioning portion is formed as the annular groove 4 along the circumferential direction. Since the fitting is performed over the entire length, the fitting and mounting of the positioning member 5 to the annular groove 4 becomes strong. In addition, since the outer cylinder 2 or the inner cylinder 3 and the positioning member 5 are placed in contact with each other over the entire length, the vertical positioning of the outer cylinder 2 and the inner cylinder 3 is reliably performed. In addition,
In the first embodiment, it is preferable that the outer cylinder 2 is located on the upper side, so that rainwater traveling down the outer peripheral surface of the outer cylinder 2 and flowing down into the inner cylinder 3 is prevented.

(Embodiment 3) FIG. 5 shows a third embodiment of the present invention, in which a positioning hole 2d as a positioning portion is formed on the inner peripheral surface of an outer cylinder 2 provided with a receiving frame portion 6 on an upper portion. A plurality of them are formed at equal intervals in the circumferential direction, for example, at four locations, and a plurality of them are formed in the up-down direction, and are externally slidable in the up-down direction on the inner cylinder 3 located below the outer cylinder 2. Then, a screw 9 is used as a positioning member, and the height position of the outer cylinder 2 is adjusted.
After the screw 9 is mounted in the positioning hole 2d of the outer cylinder 2, the outer cylinder 2 is moved down, and the lower end surface 9c of the screw 9 is brought into contact with the upper end surface 3a of the inner cylinder 3 to be placed. .

As shown in this embodiment, a lid for an underground structure can be easily adjusted in volume by forming a positioning hole 2d as a positioning portion and using a screw 9 as a positioning member. In the present invention, the positioning portion shown in the first and second embodiments is an annular groove, and the positioning member is not limited to a ring shape. Embodiment 1 and Embodiment 2 from the viewpoint that the positioning with respect to No. 3 is performed reliably.
Are preferred.

In contrast to the present embodiment, the outer peripheral surface of the inner cylindrical body 3 having the receiving frame 6 provided on the upper side is positioned on the upper side as a cylindrical surface, and the outer cylindrical body 2 positioned on the lower side is vertically moved. The positioning hole 2 is slidably inserted into the inner peripheral surface of the outer cylinder 2.
d may be formed, and the lower end surface of the inner cylindrical body 3 may be brought into contact with the upper end surface of the screw 9 mounted in the positioning hole 2d.

Further, in each of the embodiments described above, the lids for underground structures according to the present invention have been described. However, these structures are merely provided with the inner cylinder and the outer cylinder without the lid body and the receiving frame. It is clear that the method can be applied to the lower basin for underground structures consisting of

[0030]

According to the lower cell for an underground structure and the lid for an underground structure of the present invention, at the time of bulk adjustment, a positioning member is fitted and mounted on an optimum positioning portion among a plurality of positioning portions. ,
The bulk adjustment can be easily performed simply by fitting the outer cylinder or the inner cylinder located on the upper side into the inner cylinder or the outer cylinder located on the lower side. At the time of adjusting the bulk after the installation, the positioning member is removable, so that the bulk adjustment can be performed only by removing the positioning member, and the bulk adjustment after the installation is easy.

The positioning member is mounted on the inner peripheral surface of the outer cylinder and is not exposed to the outer peripheral surface of the lower cell for the underground structure. ,
Even if pressure is applied to the outer peripheral surface by backfilling earth and the like, the positioning member does not come off and the positioning support is reliable. Further, since the positioning member is formed in a ring shape, the contact area between the positioning member and the upper and lower end surfaces of the inner cylindrical body that comes into contact with the positioning member can be increased, and the positioning of the inner cylindrical body or the outer cylindrical body positioned on the upper side can be performed. Support can be made more reliable.

Further, since the positioning portion is formed in a continuous annular shape along the circumferential direction, the positioning member can be securely and firmly attached to the positioning portion, so that the inner cylinder or the outer cylinder located on the upper side can be mounted. The positioning support can be made more reliable.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of a lid for an underground structure according to the present invention.

FIG. 2 is an enlarged view of a positioning section and a positioning member of FIG. 1;

FIG. 3 is an enlarged view of a main part showing another embodiment of the positioning part and the positioning member of FIG. 1;

FIG. 4 is a sectional view showing a second embodiment of the lid for underground structure according to the present invention.

FIG. 5 is a sectional view showing a third embodiment of the lid for underground structure according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Underground structure cover 2 Outer cylinder 3 Inner cylinder 4 Annular groove (positioning part) 5 Positioning member 6 Receiving frame part 7 Lid body 8 Packing 2d Positioning hole (positioning part) 9 Screw (positioning member)

Claims (8)

[Claims] 1. An inner cylinder, and an outer cylinder which is vertically movably inserted above the inner cylinder, and a plurality of positioning portions are formed on an inner peripheral surface of the outer cylinder in a vertical direction. A part of a positioning member is attached to the positioning portion, and a lower end surface of the remaining portion of the positioning member abuts on an upper end surface of the inner cylinder to position and support the outer cylinder to the inner cylinder. A lower square for underground structures, characterized by the following. 2. An outer cylindrical body, and an inner cylindrical body inserted vertically movably above the outer cylindrical body, and a plurality of positioning portions are formed on an inner peripheral surface of the outer cylindrical body in a vertical direction. A part of a positioning member is attached to the positioning portion, and an upper end surface of the remaining portion of the positioning member abuts on a lower end surface of the inner cylinder to position and support the inner cylinder to the outer cylinder. A lower square for underground structures, characterized by the following. 3. The lower cell for an underground structure according to claim 1, wherein the positioning member is formed in a ring shape. 4. The lower cell for an underground structure according to claim 3, wherein the positioning portion is an annular groove formed continuously in a circumferential direction. 5. A lid body, an inner cylinder body, and an outer cylinder body which is externally vertically movably mounted on an upper side of the inner cylinder body and has a receiving frame for supporting the lid body at an upper end thereof, A plurality of positioning portions are formed in the vertical direction on the inner peripheral surface of the outer cylindrical body, a part of a positioning member is mounted on the positioning portion, and a lower end surface of the remaining portion of the positioning member is an upper end surface of the inner cylindrical body. Wherein the outer cylindrical body is positioned and supported on the inner cylindrical body by contacting the inner cylindrical body. 6. A lid body, an outer cylinder body, and an inner cylinder body vertically inserted above the outer cylinder body so as to be vertically movable and having a receiving frame portion supporting the lid body at an upper end thereof. A plurality of positioning portions are formed vertically on an inner peripheral surface of the outer cylinder, a part of a positioning member is mounted on the positioning portion, and an upper end surface of a remaining portion of the positioning member is a lower end surface of the inner cylinder. Wherein the inner cylindrical body is positioned and supported on the outer cylindrical body by contacting the inner cylindrical body. 7. The underground structure lid according to claim 5, wherein the positioning member is formed in a ring shape. 8. The underground structure cover according to claim 7, wherein the positioning portion is an annular groove formed continuously in a circumferential direction.