JPH09105134A - Cover for underground structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the generation of a clearance between the inner peripheral surface of a receiving frame and a bar hole of a cover main body by forming a bag-shaped recessed part which comprises a peripheral wall including a part of a ridge of a cover main body and a base plate on the peripheral edge of the cover main body to be supported on the receiving frame. SOLUTION: A bag-shaped recessed part 16 is formed on the peripheral edge of a cover main body 3 to be supported on a receiving frame 2 wherein the recessed part 16 comprises a peripheral wall including a part of a ridge 17 of the cover main body 3 and a base plate. Therefore, no clearance is produced, which communicates with the interior of an underground structure between the receiving frame and a bar hole of the cover main body. This construction does not allow the formation of a similar clearance even when the cover main body 3 is slanted to and fitted in the receiving frame 2 and prevents the in-flow of the rainwater or the like and eliminates the occurrence of such a problem as an increase in the amount of sewage treatment and prevents the odor in the underground structure from leaking out on the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for an underground structure installed on an upper portion of an underground structure or the like, and more particularly, a burr hole for inserting a lid opening / closing bar used for opening and closing the lid body is provided. Regarding a lid for an underground structure. The term "underground structure lid" as used in the specification of the present application means a large iron lid, a manhole lid, a sewage basin lid, an electric power / Openable joint gutter iron lids that protect underground facility equipment and wiring for communications, iron lids for power transmission, iron lids for distribution, underground conduits for waterworks and gas pipes, and their associated equipment and the ground. A generic term for a fire hydrant lid that has the function of a door, a water control valve lid, a partition valve lid, an air valve lid, a gas pipe lid, and a water meter lid.

[0002]

2. Description of the Related Art Conventionally, a lid for an underground structure having a bur hole for inserting a lid opening / closing crowbar for opening / closing the lid body in the peripheral edge of the lid body for opening / closing the opening of the receiving frame is required,
Various proposals have been made. For example, Japanese Utility Model Publication No. 58-5712 and Japanese Utility Model Publication No. 2-26646 disclose underground structure lids having a bottomed burr hole.

[0003]

However, in these conventional lids for underground structures, these burl holes have a curled edge when viewed from the side of the lid body. On the other hand, when the lid main body is tilted and supported, a gap is formed between the inner peripheral surface of the receiving frame and the notch so as to communicate with the inside of the underground structure. Therefore, rainwater and the like flow into the underground structure through the gap, increasing the amount of sewage treated, and leaking odor to the ground, which is not preferable in terms of environmental hygiene. The present invention has been made to solve the above problems, and an object of the present invention is to provide a lid for an underground structure in which no gap is formed between the inner peripheral surface of the receiving frame and the burl hole of the lid body.

[0004]

In order to solve the above-mentioned problems, in the lid for an underground structure according to the present invention, a part of the edge winding of the lid main body is provided on the periphery of the lid main body supported by the receiving frame. A burr hole formed by forming a bag-shaped recess made up of a peripheral wall and a bottom plate portion including the projection, and an overhanging part projecting from the upper part of the curb toward the inside of the recess so that the hook part of the lid opening / closing bar can be engaged. Is formed.

[0005]

In the lid for an underground structure of the present invention having the above-mentioned structure, a bag-like shape having a peripheral wall of the lid body supported by the receiving frame and a peripheral wall including a part of the edge winding of the lid body and a bottom plate portion By forming the recessed portion, it is possible to prevent a gap between the receiving frame and the burl hole of the lid body from communicating with the inside of the underground structure when installed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the overall structure of a lid 1 for an underground structure that is a first embodiment of the present invention. The underground structure lid 1 is a lid that has a substantially annular receiving frame 2 that is provided on the ground such as a vertical hole that leads to an underground structure such as a sewer, and a substantially circular opening of the receiving frame 2 that can be opened or closed. A hinge 6 is connected to the main body 3.

The lid main body 3 has a rim winding 17 whose outer peripheral surface is inclined downward so as to be reduced in diameter over the entire peripheral edge thereof, and a hinge for connecting the receiving frame 2 to the rear surface peripheral edge of the lid main body 3. 6
A lid side mounting portion 5 for mounting the lid side mounting portion 5 is formed, and a burl hole 15 is formed on the opposite side of the lid side mounting portion 5 so as to open the front surface side of the lid body 3.

The burl hole 15 has a peripheral wall 17a including a part of the curled edge 17 and a bottom plate portion 17b.
The bag-shaped concave portion 16 formed in the shape of a divided circle is formed, and the edge winding 1
A protruding portion 21 having a locking portion 21a formed on the lower surface is protruded from the upper portion of 7 toward the inside of the recess 16. Then, as the projecting portion 21 is projected, the width L1 and the width G in the G direction on the surface of the lid body 3 are increased as shown in FIG.
A substantially rectangular opening 19 having a width L2 in the H direction orthogonal to the direction is formed.

The recess 16 has a width L in the H direction.
2 and a width L3 in the G direction orthogonal to the H direction and substantially smaller than the width L2. Reference numeral 22 denotes a step portion, which is the edge winding 17 of the lid body 3.
It is formed by the difference between the height of the recess and the depth of the recess 16.

The receiving frame 2 is inclined toward the inner periphery so as to be reduced in diameter so as to form an inner peripheral surface 18 into which the edge winding 17 of the lid main body 3 is fitted, and is attached to the lid side. Part 5
A hinge receiving seat 4 for attaching the hinge 6 is formed at a position corresponding to, and a locking recess 23 is formed in the upper end surface of the receiving frame 2 corresponding to the burl hole 15 of the lid body 3.

The hinge 6 comprises a first hinge member 6A having a long hole 7H and a second hinge member 6B. One end of the first hinge member 6A is attached to the hinge seat 4 of the receiving frame 2 and the second hinge member 6A is attached. One end of the member 6B is attached to the lid-side attachment portion 5 of the lid body 3, and the other end is the long hole 7H of the first hinge member 6A.
Is slidably mounted on.

When the lid main body 3 is fitted and supported on the receiving frame 2, the lid side mounting portion 5 of the lid main body 3 and the hinge receiving seat 4 of the receiving frame 2 are connected by the hinge 6, and the inside of the receiving frame 2 is inclined. On surface 18,
The slanted curl 17 of the lid body 3 is fitted and supported. At this time, the burl hole 15 of the lid main body 3 is formed in the peripheral wall 1 including the edge winding 17.
Since the bag-shaped recess 16 is formed by 7a, the inner peripheral surface 18
No space is formed between the and, which communicates with the interior of the underground structure.

Next, the case of opening the lid main body 3 fitted and supported by the receiving frame 2 will be described. When opening the lid, a dedicated lid opening / closing bar 30 is used. The lid opening / closing bar 30 is shown in FIG. 8 to FIG.
Is formed with a hook-shaped tip portion 31 at one end thereof, and a hook portion 32 is formed at the tip of the tip portion 31. Further, one end of the burl body 33 is engaged with the bent side of the tip portion 31. The claw portion 35 is projected.

The tip portion 31 has a thickness L4 as viewed from the arrow B,
It is formed to have a width L5 as viewed from the direction of arrow N, which has a relationship of width L2> width L3> width L5 and width L1> thickness L4 as compared with the opening 19 of the lid body 3. Especially the width L
3 is formed slightly wider than the width L5.

When the lid opening / closing bar 30 is used to open the lid, the tip 31 of the lid opening / closing bar 30 is inserted into the recess 16 from the opening 19, as shown in FIGS. However, after inserting the hook portion 32 and the locking claw portion 35 toward the circular arc side of the recess 16 which is a quarter circular arc in plan view,
Locking recess 2 formed by the locking claw 35 on the upper end surface of the receiving frame 2.
Rotate 90 degrees horizontally to match 3. At this time, the hook portion 32 of the lid opening / closing bar 30 is located below the overhanging portion 21 that extends from the upper portion of the curly wrap 17 toward the inside of the recess 16.

Next, when a rotational moment force in the I direction is applied to the lid opening / closing bar 30 with the locking claw portion 35 locked in the locking concave portion 23 as a fulcrum of the "lever", the width L of the concave portion 16 is increased.
Since 3 is slightly wider than the width L5 of the tip end portion 31 of the lid opening / closing bar 30, the overhanging portion 2 does not rattle.
The hook portion 32 engaged with the locking portion 21a of No. 1 pushes up the lid body 3 to release the fitting support. At this time, by any chance, the locking portion 2
Even if the locked state shifts when the lid is opened due to wear of the la or the hook portion 32, the width L1 of the opening 19 is narrower than the width L5 of the tip 31 of the lid opening / closing bar 30, and thus the lid opening / closing bar 30 is opened.
Does not come out of the burl hole 15. Further, in this displaced state, the rear wall 1 facing the curling 17 of the peripheral edge 17a.
The tip portion 31 comes into contact with 7c and is applied as a force to push up the lid main body.

After that, the lid opening / closing bar 30 is pulled up in the direction of the arrow J, the lid body 3 is placed on the edge of the receiving frame 2, and the hinge 6 is swung horizontally to open the lid or change the hand. It can be flipped 180 degrees to open the lid.

Next, the second embodiment of the lid for an underground structure of the present invention will be described with reference to FIGS.
It is shown in FIG.

The burl hole 15a has a concave portion 16a composed of a peripheral wall 17a including a part of the curled wire 17 and a bottom plate portion 17b.
Is formed, and a protruding portion 21b having a locking portion 21c on the lower surface is protruded from the center of the edge winding 17 toward the inside of the recess 16a. Further, a locking recess 23a is formed on the upper end surface of the receiving frame 2 at a position corresponding to the burl hole 15a.

The structure of the lid opening / closing bar 30a used by being inserted into the above-mentioned burl hole 15a is shown in FIGS.
Shown in As shown in these figures, the lid opening / closing bar 30
a has a bent rectangular tip portion 31a formed at one end thereof, and a locking claw portion 35 supported by being bitten into the locking recess 23a on the bent side of the tip portion 31a.
a is configured. The central portion of the tip portion 31a is open, and this opening portion is the above-mentioned protruding portion 21b.
It is formed so as to fit with. The tip end of the tip end portion 31a forms an engagement slope portion 36a to be engaged with the locking portion 21e formed on the lower surface of the overhang portion 21b.

Next, the operation of opening and closing the lid body 3a by the cooperative operation of the burl hole 15a and the lid opening / closing burr 30a will be described below. From the state of FIG.
When a rotational moment force is applied in the Q direction with the locking claw portion 35a as the fulcrum of the "lever", the force with the locking claw portion 35a as the fulcrum of the "lever" is generated by the engaging slope portion 36a. Two
It is applied as a force that pushes up 1b from below. Therefore, the lid body 3a is lifted slightly upward, and the fitting support is released.

As described above, in the underground structure lid of this embodiment, the burl hole is formed as a bag-shaped concave portion including the peripheral wall including a part of the edge winding of the lid body and the bottom plate portion. As a result, even if the fitting to the receiving frame is inclined, a gap that connects the inside of the underground structure and the burl hole is not formed. for that reason,
Rainwater does not flow into the underground structure, and the increase in sewage treatment amount can be prevented. Further, since the odor in the underground structure does not leak to the ground, there is no problem in environmental hygiene. Further, since the lid opening / closing bar does not contact the inner peripheral surface of the receiving frame when the lid is opened, the lid main body can be securely fitted and supported without damaging the inner peripheral surface.

The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and has substantially the same configuration as the technical idea described in the claims of the present invention, and any device having the same function and effect can be realized by the present invention. It is included in the technical scope of the invention.

For example, in the above-described embodiment, the projecting portion is projected from the entire upper width or the center of the curly strip forming the concave portion. However, as shown in FIG. 14, it is stretched at both corners of the burl hole 15b. The protrusion 21d may be extended. At this time, the lid opening / closing burl 30b used for opening the lid has an engaging portion 37 protruding leftward and rightward at the tip as shown in FIG. 15, and is attached to both corners of the burl hole 15b. The engaging portion 37 of the lid opening / closing bar 30b is engaged with the extended portion 21d so that the fitting support is released.

In addition to the projecting portion in the embodiment, when the projecting portion is projected from the upper portion of the rear wall of the concave portion and the lid main body supported by the receiving frame is released from the fitting, the lower portion of the projecting portion is removed. The tip of the lid opening / closing bar may be engaged with, and then the tip of the lid opening / closing bar may be engaged with the overhanging portion to be drawn out onto the receiving frame.

[0026]

As described above, in the underground structure lid of the present invention, the lid main body supported by the receiving frame is provided with
By forming a bag-shaped recess consisting of the peripheral wall including a part of the curling of the lid body and the bottom plate portion, when installed, a gap communicating with the inside of the underground structure is provided between the receiving frame and the burl hole of the lid body. Does not happen. Therefore, even if the lid main body is slantably fitted to the receiving frame, no gap is formed in the same manner, rainwater and the like can be prevented from flowing in, and the problem of increasing the amount of sewage treatment can be prevented. Further, since it is possible to prevent the odor in the underground structure from leaking to the ground, there is no problem in environmental hygiene. Further, since the bulging portion is formed by projecting from the upper portion of the curb into the concave portion to form the burl hole, the inner peripheral surface of the receiving frame is damaged by engaging the tip of the lid opening / closing bar with the bulging portion. The lid can be easily opened without using.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing the overall structure of a manhole cover according to a first embodiment of the present invention.

FIG. 2 is a bottom view of the lid main body shown in FIG.

FIG. 3 is a cross-sectional view showing a burl hole and a hinge connecting portion.

FIG. 4 is a plan view illustrating an operation of inserting a lid opening / closing bar into the burl hole shown in FIG. 1 from a lateral direction and rotating the burr for opening / closing about 90 degrees.

[Fig. 5] After inserting the lid opening / closing bar in Fig. 4, about 9
It is the side sectional view which looked at the state rotated by 0 degree from the H direction.

FIG. 6 shows a state in which the lid body is slightly lifted and opened from the state of FIG.

7 shows a state in which the lid body slightly lifted from the state of FIG. 5 is being pulled up while being slanted upward in the J direction.

FIG. 8 is a perspective view showing the vicinity of the tip end portion of the lid opening / closing bar used for opening / closing the underground structure lid according to the first embodiment of the present invention.

FIG. 9 is a side view of the vicinity of the tip of a lid opening / closing bar used for opening / closing the underground structure lid, which is the first embodiment of the present invention, as seen from the M direction in FIG. 8.

FIG. 10 is a front view of the vicinity of the tip of a lid opening / closing bar used for opening / closing the underground structure lid according to the first embodiment of the present invention, as viewed from the N direction in FIG. 9.

FIG. 11 is a side cross-sectional view showing a state in which a lid opening / closing bar is inserted into the burl hole of the underground structure lid that is the second embodiment of the present invention.

FIG. 12 is a plan view showing the structure of burl holes in the lid for an underground structure which is the second embodiment of the present invention.

FIG. 13 is a perspective view showing a configuration in the vicinity of a tip end portion of a lid opening / closing bar which is used for opening / closing a lid for an underground structure according to a second embodiment of the present invention.

FIG. 14 is a plan view showing another embodiment of the burl hole.

15 is a perspective view showing a configuration near a tip end portion of a lid opening / closing bar to be engaged with the burl hole in FIG. 14;

[Explanation of symbols]

 1 Underground Structure Lid 2, 2a Receiving Frame 3, 3a Lid Main Body 4 Hinge Receiving Seat 5 Lid Side Mounting Part 6 Hinge 6A 1st Hinge Member 6B 2nd Hinge Member 7H Long Hole 15, 15a, 15b Burr Hole 16, 16a Recess 17 Edge winding 17a Peripheral wall 17b Bottom plate part 17c Rear wall 18 Inner peripheral surface 19 Opening part 21,21b Overhanging part 21a, 21c Engaging part 22 Step part 23, 23a Locking concave part 30, 30a, 30b Lid for opening / closing lid 31 , 31a, 31b Tip part 32 Hook part 33 Bar body 35, 35a, 35 Locking claw part 36a Slope part for engagement 37 Engagement part

Claims (1)

[Claims] 1. A bag-shaped concave portion formed of a peripheral wall including a part of the curling of the lid main body and a bottom plate portion is formed on the peripheral edge of the lid main body supported by the receiving frame, and the upper portion of the curving coil is inserted into the concave portion. A lid for an underground structure, characterized in that a bar hole is formed in which an overhanging portion that allows a hook portion of the lid opening / closing bar to engage with is formed.