JPH0635345U - Underground structure lid - Google Patents

Abstract

(57) [Summary] [Objective] To provide a lid for an underground structure capable of opening and closing the upper end of a vertical hole communicating with the underground structure. [Structure] A ring-shaped receiving seat 4 is formed on the circular inner peripheral surface of the frame body 3 so as to project toward the center of the frame body 3 at a predetermined interval in the vicinity of the outer peripheral edge of the lower surface of the frame body 1. Pair of support ribs 13
Of the supporting ribs 13, the pivot shaft portions 14 are integrally formed on the opposite surfaces of the tip portions of the pair of support ribs 13, respectively.
The projecting portions 21 are formed on both side surfaces of the lower end of the connector 20 so that the ring-shaped seat 4 can be inserted from above.
A guide groove 22 is formed on both side surfaces of the top of the connector 20 in a direction perpendicular to the longitudinal direction of the connector 20, and a hexagon socket bolt 23 is detachably screwed into the guide groove 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lid for an underground structure which can openably and closably seal the upper end of a vertical hole communicating with an underground structure for burying water and sewerage, electric wires or telephone lines underground.

[0002]

[Prior art]

 In underground structures, when the water level in underground structures suddenly rises due to heavy rainfall and the water in underground structures gushes from the upper end of the pit, the lid body is lifted by the water pressure and flows out. In order to prevent the pressure in the underground structure from rising significantly, allowing the lid body to rise above the frame by a specified interval to drain the water from the underground structure. It has a structure that keeps it connected to the frame and prevents the lid from climbing up by the car. Further, it is required that the lid main body can be easily removed from the frame during maintenance and inspection of the underground structure.

There are those described in Japanese Utility Model Publication No. 59-20438 and Japanese Utility Model Publication No. 60-20675, which meet such requirements. In the one disclosed in Japanese Utility Model Publication No. 59-20438, a pair of ribs are projected on the lower surface of the lid body at a predetermined interval, and guide grooves are formed on the opposite surfaces of the ribs. A pivot pin that can be fitted in the guide groove is integrally projected on both side surfaces of the upper end of the, and stoppers are attached so that the pivot pin fitted in the guide groove does not come off the guide groove.

Further, in the one disclosed in Japanese Utility Model Publication No. 60-20675, a locking body that can be disengageably engaged with an engaging portion of a frame is pivotally attached to a lower surface of a lid body in a tiltable manner. A weight body is pivotally attached to the lid body and the lock body, a hole is formed in the lid body so as to penetrate a tool tip, and the weight body engages with the tool tip locking piece. In the case of opening the lid, the tool tip is passed through the hole in the lid body, and the tool tip locking piece is engaged with the engaging recess of the weight body, and then the tool is If it was pulled up, the lock body could be disengaged from the engagement part of the frame body in conjunction with the tilting of the weight body, and the lid body could be lifted up.

[0005]

[Problems to be solved]

 In the one disclosed in Japanese Utility Model Publication No. 59-20438, there is a drawback in that it is difficult to attach the stopper to the guide groove adjacent to the lower surface of the lid body because it is obstructed by the lower surface of the lid body and other reinforcing ribs. It was

In addition, in the one disclosed in Japanese Utility Model Publication No. 60-20675, since a weight body is required outside the locking body and an engaging recess is required to be formed in the weight body, the number of parts is large. At the same time, the number of processing man-hours increased, and there was a drawback that cost increase could not be avoided.

[0007]

[Means and Actions for Solving the Problems]

 The present invention relates to an improvement of a lid for an underground structure that eliminates such drawbacks, and a frame body provided at an upper end of a vertical hole communicating with the underground structure and a frame that is removably fitted and mounted on the frame body. In the lid for an underground structure including a lid body, a ring-shaped seat is integrally formed on the inner peripheral surface of the frame body, and a pair of support ribs are formed on the lower surface of the lid body at a predetermined interval. A pair of support ribs are provided in a projecting manner, and pivot shaft portions are integrally formed on opposite surfaces of the tip portions of the pair of support ribs, respectively, and the ring-shaped seats of the frame body are vertically movably movable within a certain range. A guide groove into which the pivot shaft portion can be inserted and fitted is formed on both sides of the top of the fitted connecting tool, and the pivot shaft portion of the lid body is inserted and fitted into the guide groove of the connecting tool. In this state, an engaging member for immovably engaging the pivot shaft in the guide groove is attached to the guide groove of the connector. .

Since the present invention is configured as described above, when the lid body is lifted from the frame body and removed, the lid body is moved around the vertical line passing through the ring-shaped seat of the frame body. By turning, it is possible to open the upper end of the vertical hole that communicates with the underground structure.

Further, according to the present invention, the upper end of the vertical hole can be opened and closed by tilting the lid main body in an up-and-down self-centering manner centering on the inner part of the upper guide groove of the connector. Further, in the present invention, since the locking member is attached to the guide groove of the connector so as to hold the pivot shaft of the lid body at the inner part of the guide groove of the connector, the lower surface of the lid body and the reinforcing ribs are attached. The work of attaching the locking member can be easily performed without being disturbed.

Further, according to the present invention, a lid for an underground structure including a frame body provided at an upper end of a vertical hole communicating with an underground structure and a lid main body that is removably fitted and mounted on the frame body is provided. , A locking projection is provided on the inner peripheral surface of the frame body, and a pair of left and right locking claw holding brackets are integrally projected on the back surface of the lid body, and between the pair of locking claw holding brackets. The arranged locking claw is removably pivotally supported on the locking projection by a pivot shaft passing through the locking claw holding bracket and the locking claw, and is positioned above the locking claw to cover the lid body. A tool insertion hole is formed in the tool insertion hole, the tip of the bent portion of the L-shaped tool inserted in the tool insertion hole is brought into contact with the lower surface of the lid body, and the base end of the bent portion of the L-shaped tool is attached to the frame body. When the L-shaped tool is tilted to come in contact with the upper surface of the locking projection, the upper surface of the locking claw is contacted with the lower surface of the base of the L-shaped tool. The upper contact portion is formed on the locking claw so that the locking claw is disengaged from the locking projection of the frame body by pressing the portion.

Since the present invention is configured as described above, the lower portion of the L-shaped tool is inserted into the tool insertion hole of the lid body, and the tip of the bent portion of the L-shaped tool inserted into the tool insertion hole is inserted. The L-shaped tool is brought into contact with the lower surface of the lid body, and the L-shaped tool is tilted so that the base end of the bent portion of the L-shaped tool is brought into contact with the upper surface of the locking protrusion of the frame body. When the L-shaped tool is tilted, the locking claw is removed from the locking protrusion of the frame body, and the lid body is easily lifted from the frame body to open the vertical hole in one operation by the principle of "lever". be able to.

Further, according to the present invention, the lid main body is formed by the engagement relationship between the ring-shaped seat and the connecting tool of the frame body and the engagement relationship between the locking projection of the frame body and the locking claw of the lid body. Since it is possible to raise it by a certain height above the frame, part of the water in the underground structure can be discharged to prevent abnormal pressure rise in the underground structure, and even in this state, the lid body can be removed from the frame. It can be moored so that it does not separate, and the outflow of the lid body can be prevented in advance.

[0013]

【Example】

 An embodiment of the present invention shown in the drawings will be described below. A sewer tunnel (not shown), which is a kind of underground structure, is constructed in the ground 1, and a circular vertical hole 2 is formed by rising upward from the tunnel, and a substantially cylindrical frame is formed at the upper end of the vertical hole 2. A body 3 is provided.

A ring-shaped receiving seat 4 is formed on the circular inner peripheral surface of the frame body 3 so as to project toward the center of the vertical hole 2, and the frame body is located on the opposite side of the ring-shaped receiving seat 4. 3, a locking projection 6 is formed on the inner peripheral surface of the locking projection 3, a locking portion 7 recessed upward is formed on the lower surface of the locking projection 6, and a flat support portion is formed on the upper surface of the locking projection 6. 8 is formed.

The lid body 10 which can be removably fitted into the frame body 3 is formed into a substantially disc shape, and reinforcing ribs 11 and 12 are integrally formed at the outer peripheral edge of the lower surface thereof and an appropriate position on the lower surface thereof. Has been done.

Further, a pair of support ribs 13 is provided in the vicinity of the outer peripheral edge of the lower surface of the frame body 3 at a predetermined interval, and the pair of support ribs 13 are pivotally supported on the opposite surfaces at the tips thereof. The part 14 is integrally formed.

Furthermore, a tool insertion hole 15 is cut out on the lower surface of the lid body 10 on the side opposite in diameter to the support rib 13, and a pair of left and right locking claws are held below both sides of the tool insertion hole 15. The bracket 16 is integrally projected, the locking claw 17 is arranged between the pair of locking claw holding brackets 16, and the locking claw holding bracket 16 and the pivot 19 penetrating the locking claw 17 are provided. A locking claw 17 is pivotally supported so that the locking projection 6 can be engaged with and disengaged from the locking projection 6. A protruding piece 18 protruding upward is formed at the outer top end of the locking claw 17.

Further, projecting portions 21 are formed on both side surfaces of the lower end of the connecting tool 20 so that the ring-shaped seat 4 of the frame body 3 can be inserted from above, and the connecting tool 20 is provided on both side surfaces of the top portion of the connecting tool 20. A guide groove 22 is formed in a direction perpendicular to the longitudinal direction, and a hexagon socket bolt 23 is detachably screwed into the guide groove 22.

Since the illustrated embodiment is configured as described above, after the bent portion 31 of the L-shaped tool 30 longer than the tool insertion hole 15 of the lid body 10 is obliquely inserted into the tool insertion hole 15, As shown in FIG. 5, the tip 32 of the bent portion 31 is brought into contact with the lower surface of the lid body 10, and the base end 33 of the bent portion 31 is fixed to the support portion 8 of the locking projection 6 of the frame body 3. When the L-shaped tool 30 is tilted so as to abut, the projection 18 of the locking claw 17 is pressed against the lower surface of the base end 33 of the L-shaped tool 30, and the locking claw 17 tilts counterclockwise. Then, the locking claw 17 is disengaged from the locking portion 7 of the locking projection 6. Therefore, in this state, if the L-shaped tool 30 is further tilted in the same direction, even if the base end 33 of the L-shaped tool 30 is disengaged from the support portion 8 of the locking projection 6, the locking piece 34 of the L-shaped tool 30 is framed. Since the lid body 10 is locked to the upper end surface of the body 3, the lid body 10 is easily lifted above the frame body 3 by the principle of leverage, and the lid body 10 is openable up and down about the pivot shaft portion 14 so as to be freely undulated. It

Further, when the lid body 10 is lifted above the frame body 3 in a substantially horizontal state, the lid body 10 is pivoted about a vertical line passing through the ring-shaped seat 4, and the lid body 10 is connected to the lid body 10. The combined connecting tool 20 can rotate in the ring-shaped receiving seat 4 of the frame body 3, and the vertical hole 2 is opened.

Further, after inserting the connecting tool 20 into the ring-shaped receiving seat 4 of the frame body 3, the pivot shaft portion 14 of the lid main body 10 is fitted into the guide groove 22 of the connecting tool 20, and the guide groove 22 By screwing the square hole bolts 23, the connector 20 can be easily coupled to the lid body 10.

[Brief description of drawings]

1 is a vertical side view illustrating an embodiment of a lid for an underground structure according to the present invention.

FIG. 2 is an enlarged vertical cross-sectional side view of a main part of a connecting portion between a lid body 10 and a connecting tool 20.

FIG. 3 is a cross-sectional view taken along the line III-III of FIG.

FIG. 4 is an enlarged longitudinal side view of a main part of a locking portion between a locking protrusion 6 of the frame body 3 and a locking claw 17 of the lid body 10.

FIG. 5: The lid body is further tilted with the L-shaped tool 30 in FIG.
It is an enlarged vertical side view of the main part with 10 open.

[Explanation of symbols]

1 ... Ground, 2 ... Vertical hole, 3 ... Frame body, 4 ... Ring-shaped seat, 5
... holes, 6 ... locking protrusions, 7 ... locking parts, 8 ... supporting parts, 10 ...
Lid body, 11, 12 ... Reinforcing ribs, 13 ... Support ribs, 14 ... Pivot shaft portion, 15 ... Tool insertion hole, 16 ... Locking claw holding bracket, 17 ...
Locking claw, 18 ... Projection piece, 19 ... Axis, 20 ... Connecting tool, 21 ... Projection part, 22 ... Guide groove, 23 ... Hexagon socket head bolt, 30 ... L-shaped tool, 31
… Bending part, 32… tip, 33… base end, 34… locking piece.

Claims (2)

[Scope of utility model registration request] 1. A lid for an underground structure, comprising a frame body provided at an upper end of a vertical hole communicating with an underground structure, and a lid body fitted and mounted on the frame body so as to be removably fitted to the frame body, wherein the frame is provided. A ring-shaped seat is integrally formed on the inner peripheral surface of the body, and a pair of support ribs are provided on the lower surface of the lid main body at a predetermined interval so as to project from each other. The pivot shaft portions are integrally formed on the respective surfaces, and the pivot shaft portions are provided on both side surfaces of the top of the connector, which is loosely fitted in the ring-shaped seat of the frame vertically within a certain range. Is formed so that the pivot shaft portion of the lid body is inserted and fitted in the guide groove of the connector, and the pivot shaft portion in the guide groove is immovably engaged. A lid for an underground structure, wherein a locking member for stopping is attached to a guide groove of the connecting tool. 2. A lid for an underground structure comprising a frame body provided at an upper end of a vertical hole communicating with an underground structure and a lid body fitted and mounted on the frame body so as to be removably fitted to the frame body. Locking protrusions are provided on the inner peripheral surface of the body, and a pair of left and right locking claw holding brackets are integrally projectingly provided on the back surface of the lid body, and locking is provided between the pair of locking claw holding brackets. A pawl is pivotally supported on the locking projection by a pivot shaft passing through the locking pawl holding bracket and the locking pawl so as to be disengageable, and a tool insertion hole is formed in the lid body above the locking pawl. The tip of the bent portion of the L-shaped tool inserted in the tool insertion hole is brought into contact with the lower surface of the lid body, and the base end of the bent portion of the L-shaped tool is brought into contact with the upper surface of the locking projection of the frame body. When the L-shaped tool is tilted to be brought into contact with the L-shaped tool, the locking claw upper abutting portion is pressed against the lower surface of the base portion of the L-shaped tool to cause the frame body. The lid for an underground structure, wherein the upper abutment portion is formed on the locking claw so that the locking claw is disengaged from the locking protrusion.