JP3865510B2 - Small manhole cover device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a small manhole cover device for use in a small manhole device connected to a sewage main.
[0002]
[Prior art]
In recent years, the manhole device connected to the sewage main pipe is replaced with a large concrete manhole device, and the inner diameter of the manhole apparatus is as shown in FIG. Small manhole devices constructed by connecting manhole rising tubes 3 made of synthetic resin of 30 cm or less have been widely used.
[0003]
Conventionally, as a small manhole cover device used in this small manhole device, a receiving body 6 formed with a tube body loose fitting hole 5 for loosely fitting the upper end portion of the manhole rising tube body 3 at the center is provided. It is installed on a seat body setting ground portion 7 formed by compacting crushed stone or the like at the time of backfilling, and a substantially cylindrical fixed lid receiving body 8 having upper and lower surfaces is positioned and fixed on the receiving seat body 6. There is known a configuration in which a substantially circular plate-like lid body 9 that opens and closes the upper surface opening is detachably mounted on the fixed lid receiving body 8 with the upper surface aligned with the road surface 10.
[0004]
[Problems to be solved by the invention]
However, in the conventional small manhole cover device, the seat installation ground portion 11 is depressed after construction, such as when the seat installation ground portion 11 is depressed and the cover body 9 on the receiving seat 6 sinks unevenly. 11 has to be restored to the original state, and the lid body 9 has to be corrected to the original height, and the height correction operation of the lid body 9 is complicated.
[0005]
The present invention has been made in view of these points, and an object of the present invention is to provide a small manhole cover device that can simplify the height correction operation of the cover.
[0006]
[Means for Solving the Problems]
The lid device for a small manhole according to claim 1 is provided with a hole for loosely fitting a tubular body, which is installed on a seating ground portion in the vicinity of the upper end portion of the manhole rising tube body and loosely fits the upper end portion of the manhole rising tube body. An annular receiving seat formed at the center, a substantially cylindrical fixed lid receiving body positioned and fixed on the receiving seat, and a substantially cylindrical attached to the fixed lid receiving body so that the vertical position can be adjusted. A movable lid receiver, and a lid that is detachably attached to the movable lid receiver, and a mud inflow prevention portion is formed at a lower end of the movable lid receptacle, and the mud inflow prevention portion is fixed It is fitted on the outer peripheral side of the upper end of the lid receiver .
[0007]
And when the seat installation ground part is depressed after the construction and the lid sinks unequally, the movable lid receiver is moved upward by an amount corresponding to the sinking amount with respect to the fixed lid receiver. Since the height can be corrected, there is no need to restore the recessed seat body installation ground part to the original state .
[0008]
The small manhole cover device according to claim 2 is the small manhole cover device according to claim 1, wherein the lower spacer receiving portion is formed on the fixed cover receiving body and the upper spacer receiving portion is formed on the movable cover receiving body. A spacer body is disposed between the two.
[0009]
Since the spacer body is disposed between the upper spacer receiving portion of the movable lid receiving body and the lower spacer receiving portion of the fixed lid receiving body, the force acting on the fixed lid receiving body from the movable lid receiving body. Is dispersed by the spacer body, and deformation of the fixed lid receiving body is prevented.
[0010]
Small manhole lid device according to claim 3, in small manhole lid device according to claim 1 or 2, the fixed cover receiving body, to each other along the Mesunishigo portion having a screw hole in the circumferential direction A plurality of bolts for adjustment are formed on the inner surface of the movable lid receiving body at equal intervals, and a plurality of bolt body mounting portions are formed at equal intervals along the circumferential direction so as to face the female threaded portions. A body is attached to the bolt body mounting portion so as to be rotatable, and a tip end portion of the adjusting bolt body is screwed into the screwing hole of the female screwing portion.
[0011]
And when the seat installation ground part is depressed after the construction and the lid sinks unequally, remove the lid, rotate the adjustment bolt body, and move the movable lid receiver upward with respect to the fixed lid receiver. Since the height of the lid can be corrected by moving it by an amount corresponding to the amount of settlement, it is not necessary to restore the recessed seat body installation ground part to the original state.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of an embodiment of a small manhole cover device of the present invention will be described with reference to the drawings.
[0013]
In FIGS. 1 and 2, reference numeral 11 denotes a manhole rising pipe. The manhole rising pipe 11 is formed into a cylindrical shape with a diameter of 30 cm or less with a synthetic resin such as vinyl chloride resin, and the manhole rising pipe. A seat installation ground portion 12 is formed in the vicinity of the upper end portion of 11. This sitting body installation ground portion 12 is formed by compacting crushed stone or the like at the time of backfilling. Further, the upper opening of the manhole rising tube 11 is closed by an inner lid 14 so as to be freely opened and closed. Further, a small manhole cover device 15 is disposed around the upper end of the manhole rising tube 11.
[0014]
As shown in FIGS. 1 to 3, the small manhole cover device 15 includes a receiving seat body 21 installed on the seat body setting ground portion 12, and a fixed lid is provided on the receiving seat body 21. The receiving body 22 is positioned and fixed. A movable lid receiving body 23 is attached to the fixed lid receiving body 22 so that the vertical position can be adjusted. A lid 24 is detachably attached to the movable lid receiving body 23.
[0015]
The receiving seat body 21 is formed into a plate-like annular shape with concrete or synthetic resin having a high compressive strength, and has a frustoconical tubular body loose fitting hole 31 whose diameter is expanded upward. The upper end portion of the manhole rising tube body 11 is loosely fitted into the tube body loose fitting hole 31 formed. In addition, an annular lid receiving body mounting step 32 is formed on the upper surface of the receiving seat body 21.
[0016]
Further, the fixed lid receiving body 22 is formed in a substantially cylindrical shape having upper and lower surfaces opened by casting or the like, and a flange portion 35 protruding outward is formed at a lower end portion. The flange portion 35 fitted to the lid receiving body mounting step portion 32 is connected and fixed to the lid receiving member mounting step portion 32 by a connecting bolt body 36. In addition, a substantially annular lower spacer receiving portion 37 is formed on the upper end portion of the fixed lid receiving body 22 so as to protrude inward. Further, a female threaded portion 38 is formed in this lower spacer receiving portion 37 so as to project at three positions at regular intervals of 120 ° along the circumferential direction, and penetrates the female threaded portion 38 vertically. A screw hole 39 is formed.
[0017]
Further, the movable lid receiving body 23 is formed in a substantially cylindrical shape having upper and lower surfaces opened by casting or the like, a cylindrical mud inflow preventing portion 41 is formed in the lower portion, and an annular lid is formed on the inner peripheral surface of the upper end portion. A receiving step portion 42 is formed. In addition, a substantially annular upper spacer receiving portion 43 is formed on the inner surface in the vertical direction of the movable lid receiving body 23 so as to protrude inward, and the bolt body mounting portion 45 is provided on the upper spacer receiving portion. In a state of being opposed to the female threaded portion 38 integrally with 43, it is formed to project at three positions at equal intervals from each other at 120 ° along the circumferential direction.
[0018]
An adjusting bolt body 48 is rotatably attached to the bolt body attaching portion 45 of the movable lid receiving body 23 in a state of being prevented from coming off, and the tip end portion of the adjusting bolt body 48 is connected to the female screw. It is screwed into the screw hole 39 of the joint portion 38. In addition, in a state where the movable lid receiver 23 and the fixed lid receiver 22 are connected by the adjusting bolt body 48, the mud inflow preventing portion 41 of the movable lid receiver 23 is the upper end portion of the fixed lid receiver 22. It exists in the state fitted to the outer peripheral side.
[0019]
Further, the lid body 24 is formed into a substantially circular plate shape by casting or the like, and the outer peripheral portion is fitted to the lid receiving step portion. The upper surface opening of the movable lid receiving body 23 is closed by the lid body 24 so as to be freely opened and closed, and the upper surface of the lid body 24 coincides with the road surface 51, for example.
[0020]
On the other hand, as shown in FIG. 1, there is an approximately three-divided portion between the lower spacer receiving portion 37 of the fixed lid receiving body 22 and the upper spacer receiving portion 43 of the movable lid receiving body 23. The annular spacer body 50 is disposed in a sandwiched state. Each spacer body 50 is formed in a rectangular shape and a curved surface using, for example, so-called waste plastic having a high compressive strength.
[0021]
Next, the operation of the above embodiment will be described.
[0022]
First, the construction method of the small manhole cover device 15 will be described. The manhole rising pipe 11 is connected to the upper part of the casing connecting the sewage main pipe to the side under the road, and the upper surface opening of the manhole rising pipe 11 is opened. The inner lid 14 is detachably mounted.
[0023]
After that, sand is put back to the position near the upper end of the manhole rising pipe body 11, and crushed stones are put on the sand and sufficiently solidified with a rammer or the like to form the seat installation ground part 12. .
[0024]
Subsequently, after installing the receiving seat body 21 on the seat body setting ground portion 12, on this receiving seat body 21, the fixed lid receiving body 22 and the movable lid connected to each other by the adjusting bolt body 48. The receiving body 23 is positioned and fixed by the connecting bolt body 36, and the lid 24 is detachably attached to the movable lid receiving body 23.
[0025]
Next, after putting crushed stones and the like again and sufficiently rolling them, as shown in FIG. 2, the road surface 51 is finished with asphalt so as to coincide with the upper surface of the lid body 24. At this time, if necessary, the adjustment bolt body 48 is rotated using a tool such as a spanner to adjust the vertical position of the movable lid receiver 23. When the movable lid receiving body 23 is moved upward with respect to the fixed lid receiving body 22, the spacer body 50 is clamped.
[0026]
Then, after the construction is completed in this way, the vertical position of the movable lid receiving body 23 relative to the fixed lid receiving body 22 is adjusted, for example, when the seat body setting ground portion 12 is depressed and the lid body 24 sinks unequally. To do.
[0027]
That is, the lid 24 is removed from the movable lid receiver 23, the adjustment bolt body 48 is rotated, and the movable lid receiver 23 is moved upward relative to the fixed lid receiver 22 by an amount corresponding to the amount of sinking. 1, a spacer body 50 having a predetermined size is sandwiched between the lower spacer receiving portion 37 of the fixed lid receiving body 22 and the upper spacer receiving portion 43 of the movable lid receiving body 23, and the lid as shown in FIG. Correct the height of the body 24.
[0028]
Therefore, unlike the prior art, it is not necessary to dig up the road surface 51 made of asphalt and add crushed stone or the like to restore the depressed seat body setting ground portion 12 to the original state.
[0029]
Thus, according to the above-described embodiment, when the seat body setting ground portion 12 is recessed after the construction and the lid body 24 sinks unequally, the lid body 24 is removed and the adjustment bolt body 48 is rotated. The height of the lid 24 is corrected by moving the movable lid receiver 23 in an upward direction with respect to the fixed lid receptacle 22 according to the amount of sinking, so that the seat installation ground portion in a depressed state It is not necessary to restore 12 to the original state, and the height of the lid 24 can be corrected easily and reliably.
[0030]
Further, at the time of construction, the adjustment bolt body 48 is rotated and the vertical position of the movable lid receiver 23 is adjusted, so that the upper surface of the lid body 24 can be easily and reliably aligned with the road surface 51.
[0031]
Furthermore, since the mud inflow prevention part 41 formed at the lower end of the movable lid receiver 23 is fitted to the outer periphery of the upper end of the fixed lid receiver 22, the inflow of mud or the like into the fixed lid receiver 22 is prevented. it can.
[0032]
Further, since the spacer body 50 is disposed between the upper spacer receiving portion 43 of the movable lid receiving body 23 and the lower spacer receiving portion 37 of the fixed lid receiving body 22, the movable lid receiving body 23 is fixed to the fixed lid receiving body 23. Even if it is moved upward with respect to 22, the force acting on the fixed lid receiving body 22 from the movable lid receiving body 23 is dispersed by this spacer body 50, thereby deforming the fixed lid receiving body 22. Can be prevented.
[0033]
【The invention's effect】
According to the first aspect of the present invention, when the seat body setting ground portion is depressed after the construction and the lid body sinks unequally, the amount corresponding to the sinking amount of the movable lid receiver body upward with respect to the fixed lid receiver body Because the height of the lid is corrected by moving only the lid, the height of the lid can be easily adjusted without the need to restore the recessed seat mounting ground. In addition, by adjusting the vertical position of the movable lid receiving body during construction, the upper surface of the lid body can be easily matched with the road surface or the like. Moreover, since the mud inflow prevention part formed in the lower end part of the movable lid receiver is fitted to the outer peripheral side of the upper end of the fixed lid receiver, the inflow of mud or the like into the fixed lid receiver can be prevented.
[0034]
According to the invention 請 Motomeko 2, since between the lower spacer receiving portion of the upper spacer receiving portion of the movable cover receiving member fixing the cover receiving member disposed spacer members, securing the movable lid receiving body By dispersing the force acting on the lid receiving body with the spacer body, it is possible to prevent the deformation of the fixed lid receiving body and economically without increasing the strength of the fixed lid receiving body itself.
[0035]
According to invention of Claim 3 , when a seat installation ground part becomes depressed after construction and a cover body sinks unevenly, a cover body is removed, an adjustment bolt body is rotated, and a movable cover receiving body is fixed to a fixed cover. Since the height of the lid is corrected by moving it upward by an amount corresponding to the amount of sinking, it is necessary to restore the recessed seat body installation ground to its original state. Therefore, the height of the lid can be easily and reliably adjusted, and the top surface of the lid can be adjusted by rotating the adjustment bolt body and adjusting the vertical position of the movable lid receiver during construction. It can be easily and reliably matched to the road surface.
[Brief description of the drawings]
FIG. 1 is a longitudinal cross-sectional view of a small manhole cover device according to an embodiment of the present invention in a state after the height of the cover is corrected.
FIG. 2 is a longitudinal sectional view showing a small manhole cover device in the state immediately after the construction.
FIG. 3 is a partially omitted plan view in the state after the height correction of the lid, showing the small manhole cover device.
FIG. 4 is a longitudinal sectional view showing a conventional small manhole cover device.
[Explanation of symbols]
11 Manhole riser
12 Seat installation ground
15 Small manhole cover device
21 Receiving body
22 Fixed lid holder
23 Movable lid holder
24 lid
31 Tube loose hole
37 Lower spacer holder
38 Female thread
39 Screw hole
41 Mud inflow prevention section
43 Upper spacer holder
45 Bolt body attachment
48 Adjustment bolt body
50 Spacer body

Claims (3)

An annular receiving seat formed on the center portion of a tube loose fitting hole that is installed on a seat body setting ground portion in the vicinity of the upper end portion of the manhole rising tube body and loosely fits the upper end portion of the manhole rising tube body;
A substantially cylindrical fixed lid receiving body positioned and fixed on the receiving seat;
A substantially cylindrical movable lid receiver attached to the fixed lid receiver so that the vertical position can be adjusted;
A lid that is detachably attached to the movable lid receiver ,
A small manhole cover device , wherein a mud inflow preventing portion is formed at a lower end portion of the movable lid receiving body, and the mud inflow preventing portion is fitted to an outer peripheral side of an upper end portion of the fixed lid receiving body . Small manhole lid according to claim 1, characterized in that arranged a spacer member between the lower spacer receiving portion and the upper spacer receiving portion formed in the movable cover receiving member formed on an upper portion of the fixed cover receiving body apparatus. The fixed lid receiver is formed with a plurality of female threaded portions having threaded holes at regular intervals along the circumferential direction,
On the inner surface of the movable lid receiving body, a plurality of bolt body mounting portions are formed at equal intervals along the circumferential direction so as to face the female threaded portion,
An adjustment bolt member rotation operably attached to the bolt body mounting portion, characterized in that the distal end portion of the adjusting bolt member screwed into the screwed hole of the Mesunishigo unit according to claim 1 or 2 The small manhole cover device described.

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