JPH09329236A - Underground structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of runaway of an opening cover during opening and closing operation of the opening cover buried in an inclining road surface. SOLUTION: An underground structure 100 is formed such that one or a plurality of opening covers 1 are placed in a closed state on a frame body 27 buried in a ground R and the opening cover 1 is horizontally moved in a raising state by an elevating device in the frame body 27 and opened and closed. A protrusion piece 40 is arranged on the terminal side 1E in an opening moving direction of the opening cover 1 or the protrusion piece is arranged on the opening cover opening movement direction side of the frame body 27. This constitution prevent overrun of the opening cover 1 during opening and closing operation and the runaway accident of the opening cover 1 is prevented on a slope. Further, a protrusion piece retractable from an upper base plate 13 is formed on the upper base plate 13. During elevation of the opening cover 1 in a frame, Safe elevation movement of the opening cover 1 placed on the upper base plate 13 is practicable. Further, when the opening cover 1 is horizontally opened and moved over the frame body 27, overrun of the opening cover 1 is prevented from occurring, and the runaway accident of the opening cover 1 on a slope is prevented from occurring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground structure or sewer manhole having an opening / closing lid for covering the ground directly above a connecting portion such as an underground cable laid underground along a road in a city. The present invention relates to an underground structure provided with an opening / closing lid, and particularly relates to an underground structure which prevents runaway of the opening / closing lid when opening / closing the opening / closing lid installed on an inclined ground or the like.

[0002]

2. Description of the Related Art Conventionally, opening / closing movement of an opening / closing lid in an underground structure equipped with an opening / closing lid for covering a road surface directly above a connecting portion such as an underground cable laid underground along a road in a city and sewer manhole Various lift tools and moving devices are used to open and close the opening and closing lid.

In an underground structure equipped with the opening / closing lid,
The most familiar one is, for example, as shown in FIG. 15, there is an opening / closing lid 1 for an underground structure or an opening / closing lid 1 for a manhole, which has an opening / closing lid for covering the ground right above a connecting portion such as an underground cable. The moving device 10 as a lift tool for moving the opening / closing lid 1 lifts the rectangular or disc-shaped opening / closing lid 1 by the principle of leverage. How to use it
First, as shown in FIG. 16, while holding the knock pin 7 provided at the tip of the attachment 5 of the fixture 3 attached to both corners of the opening / closing lid 1, main body holes 10B of the two moving devices 10 are held.
Assemble. Then, as shown in FIG.
The main body 10A of No. 0 is raised vertically, and the large wheels 10C are sequentially pushed down while pressing the large wheels 10C with the feet as shown in FIG. Thus, as shown by the dotted line, the open / close lid 1 is lifted. Then, as shown in FIG. 19, the two moving devices 1
The open / close lid 1 is movably mounted on the wheel 0 by the four wheels 10C and 10D, and is moved in the direction shown in the drawing. Further, when the opening / closing lid 1 is closed, the procedure is reversed.

[0004]

In the moving device 10 for moving the opening / closing lid 1, the operation procedure for moving the opening / closing lid 1 is complicated and requires skill to operate, and in a state where the horizontal posture is maintained. Is difficult to operate. In the opening / closing lid 1 buried in the sloping ground, there is a high risk that the opening / closing lid will run away due to the gradient of the road surface during the opening / closing operation of the opening / closing lid, which is very difficult to handle.

In view of the above problems, it is an object of the present invention to provide a moving device for preventing runaway of the opening / closing lid when opening / closing the opening / closing lid buried in an inclined ground or the like.

[0006]

In order to achieve the above object, an underground structure according to claim 1 of the present invention is a frame body provided above an opening of a hole opened to the ground, and a frame body thereof. An underground structure which is separable and includes an opening / closing lid placed on the frame so as to close the opening, and the underground structure is provided at the end side of the opening / closing lid in the opening movement direction. The opening / closing lid is provided with a projecting piece that can be locked.

According to the first aspect of the present invention, when the opening and closing of the opening and closing lid is moved, the opening and closing lid closed and placed in the frame is horizontally moved and opened or closed while being raised to the same level as the road surface by the elevating means. . Since the projecting piece is provided on the end side of the opening / closing lid in the opening movement direction, when the opening / closing lid is moved horizontally to the frame body, the projecting piece abuts on the frame body at the same time when the opening / closing lid is completely opened. Regulate its movement. As a result, overrun of the opening / closing lid is prevented, and a runaway accident of the opening / closing lid on a sloping ground is prevented.

Further, the underground structure according to claim 2 of the present invention is
A frame provided above the opening of the hole opened in the ground,
An underground structure which is separable from the frame and comprises an opening / closing lid placed on the frame so as to close the opening, wherein the opening / closing lid opening movement direction side of the frame has the The opening / closing lid is provided with a projecting piece that can be locked.

According to a second aspect of the present invention, when the opening / closing lid is moved, the opening / closing lid closed and placed in the frame is horizontally moved and opened or closed while being raised to the same level as the road surface by the elevating means. . Since the protruding piece is provided on the side of the opening / closing lid opening moving direction of the frame body, when the opening / closing lid is moved horizontally to the frame body, the protruding piece contacts the opening / closing lid at the same time when the opening / closing of the opening / closing lid is completed. Contact and regulate the movement. This prevents overrun of the lid, and
Prevent runaway accidents of the lid on slopes.

Further, the underground structure according to claim 3 of the present invention is
A frame provided above the opening of the hole opened in the ground,
A guide having an opening / closing lid that is separable from the frame and is placed on the frame so as to close the opening, and a guide surface that abuts at least the lower end of the opening / closing lid and horizontally moves the opening / closing lid. An underground structure having an elevating device capable of elevating a member to a position on the ground, which is arranged so as to intersect with a guide surface of the guide member in the opening / closing lid guide direction and can be withdrawn from the position. It is characterized in that a protruding piece formed on the above is provided.

According to the third aspect of the present invention, since the guide member is provided with the projecting piece that can be retracted from the guide member, the guide is provided when the opening / closing lid is moved up and down in the frame by the elevating device in the frame. This prevents accidental movement of the open / close lid mounted on the member and enables safe vertical movement. In addition, when the opening / closing lid is moved horizontally to the frame body, overrun of the opening / closing lid is prevented, and a runaway accident of the opening / closing lid on a slope is prevented.

Further, the underground structure according to claim 4 of the present invention is
The underground structure according to claim 3, wherein the projecting piece is pivotally attached to one side of the guide member in the lateral direction, and is positioned in a stopped state traversing the guide member and in a retreated non-stop state, When the opening / closing lid mounted on the guide member is lowered, the frame body returns the non-stopped projecting piece to the guide member.

According to the fourth aspect of the present invention, when the opening / closing lid is horizontally opened with respect to the frame body, overrun of the opening / closing lid is prevented and runaway accident of the opening / closing lid on a slope is prevented. To do. Further, when the lifting / lowering means inside the frame lowers the upper limit of the opening / closing lid, the frame automatically returns the projecting piece which is in the non-stop state due to forgetting to return, so that the opening / closing on the guide member is performed. The lid is securely stopped, and the lid can be safely moved up and down.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing an underground structure 100 that is a first embodiment of the present invention, and FIG. 2 is a plan view of the underground structure. 1 and 2 show an underground structure provided with an opening / closing lid for covering the road surface just above the connecting portion 20 such as an underground cable known as an electric wire common groove (CCBOX) 30, for example.

The electric wire common groove (C.C.BOX) 30
Is a facility that was developed to enhance the cityscape and aesthetics, and is a facility that jointly houses the electric wires (optical fiber, electric power, communication line) of two or more electric wire managers using the underground space on the road surface R. Te (Community Cable Box)
It is named. The C.I. C.
The BOX 30 is a concrete frame body 2 including U-shaped grooves.
5 and the opening / closing lid 1 that closes the iron frame body 27 placed on the upper surface, and the inner space S has a perforated pipe 29 buried in the ground,
Each end of 29 is exposed, and a worker enters this internal space S to perform maintenance work. Therefore, the underground structure 100
Is provided with lifting devices J such as jacks at both corners of the iron frame 27.

The iron frame 27 has, for example, a size capable of covering the two opening / closing lids 1, so that two sets of four lifting devices J are installed therein. This lifting device J
Is an upper substrate 13 and a lower substrate 12, which are guide members,
Links 15 and 17 that connect this, and links 15 and 17
And a screw rod 19 for expanding and contracting. Then, as shown in FIGS. 1 and 2, the upper substrate 13 of the pair of lifting devices J.
Has a function as a guide member when the opening / closing lid 1 is moved up and down and moved. The opening / closing operation of the opening / closing lid 1 is performed by connecting the lower end of the handle H with the screw rod 19 through the hole 1A formed in the opening / closing lid 1 and the hole 13A formed in the upper substrate 13 arranged directly below the opening / closing lid 1. The lifting device J moves the open / close lid 1 upward. When the pair of left and right guide rails 13 are aligned with the height of the road surface R, as shown by the arrow (a), the opening / closing lid 1 is placed on the ground R and the four rollers 1B on the lower surface thereof.
Roll to move the opening.

When the opening / closing lid 1 is moved to open on the ground R, if the iron frame 27 is embedded in a sloped ground with an inclination angle θ, the opening / closing lid 1 moved on the ground R is on the lower side of the ground R. It is dangerous to run down and run away. According to the present invention, a projecting piece 40 for preventing runaway of the opening / closing lid 1 on a slope is provided at the end side of the opening / closing lid 1 in the opening movement direction.

Next, the detailed structure of the projecting piece 40 will be described with reference to FIGS. With respect to the opening / closing lids 1, two projecting pieces 40 are pivotally attached to the side walls 1E at the ends of the opening / closing lids 1 at their eccentric positions by means of bolt support shafts 43 and nuts 45. (In the drawing, only the opening / closing lid 1 on the left side in the drawing is shown, but the opening / closing lid 1 on the right side also has the same configuration.) The protruding pieces 40 are hung by their own weight like a pendulum, and each side wall 1E. Further clockwise rotation is restricted by the stop member 47 formed on the. Also,
A through hole 40 in which the locking pin 49 is opened at an appropriate position of the protruding piece 40.
A in a horizontal posture, the large diameter portion 49A is engaged with a large diameter hole 40B formed facing the side wall 1E, and the elastic force of the spring 51 causes two recesses 1F and 1G formed in the side wall 1E. It is designed to be inserted into either one. Also, the protruding piece 4
Switching of 0 is performed by pulling up and rotating the locking pin 49 as shown in FIG.

When the large diameter portion 49A of the locking pin 49 is inserted into the concave portion 1F of the side wall 1E, the protruding piece 40 is attached to the protruding piece 40 as shown in FIGS.
As shown in FIG. 5, it is held in a posture of hanging downward. In this state, the protruding piece is positionally restricted to the lower surface of the opening / closing lid 1 in a protruding state, and as shown in FIGS.
The lower side of the protruding piece 40 comes into contact with the upper edge 27A, and restricts the opening movement of the opening / closing lid 1 more than necessary.

When the large diameter portion 49A of the locking pin 49 is inserted into the recess 1G of the side wall 1E, the protruding piece 40 is held in a horizontal posture as shown in FIG. In this state, the projecting piece is positionally regulated in a retracted state with respect to the lower surface of the opening / closing lid 1, and the projecting piece 40 is withdrawn from the upper edge 27A of the frame 27, so that the opening / closing movement of the left and right two opening / closing lids 1 is performed. To be able to do freely.

The underground structure 100 according to the first embodiment of the present invention
Is configured as described above, and operates as follows. When the opening / closing lid 1 is moved, as shown in FIG. 1, the opening / closing lid 1 closed and placed in the frame body is horizontally moved while being raised to the same level as the ground R by the lifting device J in the frame body 27. Operate the opening. At this time, if the ground R is inclined by the inclination angle θ, two projecting pieces 40 attached to the side wall 1E on the end side in the opening movement direction of the opening / closing lid 1 are provided in FIG.
As in Nos. 4 and 5, it is held in a downwardly hung posture. With this, the position of the protruding piece is regulated to the lower surface of the opening / closing lid 1 in a protruding state.

In the above state, when the opening / closing lid 1 is moved relative to the frame 27, the projecting piece 40 abuts the frame 27 at the same time as the opening / closing of the opening / closing lid 1, and as shown in FIG. Restrain its movement. When the opening / closing lid 1 on the upper side of the slope is opened, the protruding piece 40 is brought into contact with the edge of the lower opening / closing lid 1 by the same operation as described above to restrain the movement thereof.

On the other hand, if the ground R is a horizontal flat ground, as shown in FIG. 3, the large diameter portion 49A of the locking pin 49 is attached to the side wall 1.
It is inserted into the recessed portion 1G of E and the protruding piece 40 is held in a horizontal posture. In this state, the protruding piece 40 is positionally regulated in the retracted state with respect to the lower surface of the opening / closing lid 1, and the upper edge 27 of the frame 27 is
The protruding piece 40 retreats from A, and the opening / closing lid 1 can be freely moved. Of course, also in this case, as shown in FIGS. 4 and 5, the projecting piece 40 can be projected downward to prevent overrun of the left and right opening / closing lids 1. It should be noted that if the protruding piece 40 is in a protruding state and the lowermost end position of the protruding piece is below the roller 1B (lowermost end position of the opening / closing lid), the opening piece of the opening / closing lid 1 is projected into the road surface R. By causing the piece 40 to bite, it is possible to restrict the careless movement of the opening / closing lid.

As described above, the underground structure 1 of this embodiment
According to No. 00, there is an effect that an overrun is prevented when the opening / closing lid 1 is opened / closed and a runaway accident of the opening / closing lid 1 on a slope is prevented. Further, since the position of the protruding piece 40 can be restricted to the lower surface of the opening / closing lid in the protruding state or the retracted state, the protruding piece 40 is caused to function as described above when necessary, and when it is not necessary, the retractable state is set to the retracted state to open or close the opening / closing lid. This has the effect of enabling free movement on the ground.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, a projecting piece 52 for preventing runaway of the opening / closing lid 1 on a slope is provided on the side of the opening / closing lid opening moving direction side of the frame 27.

Next, the detailed structure of the projecting piece 52 will be described with reference to FIG. Two projecting pieces 52 are pivotally mounted on the side wall 27E of the frame body 27 on the side of the opening / closing cover opening movement direction at the eccentric position by the support shaft 43 of the bolt and the nut 45. The projecting piece 52 is restrained from rotating further clockwise by a stop member (not shown) formed in the frame body 27 in a state of standing upright and contacting the side wall 1E of the opening / closing lid 1. There is. Also, the locking pin 49
Is supported horizontally in a through hole 40A formed at an appropriate position of the projecting piece 52, the large diameter portion 49A is engaged with the large diameter hole 40B opened facing the side wall 27E, and the side wall is repulsed by the spring 51. Either one of the two recesses 27F and 27G provided in the recess 27E.
It is designed to be inserted into one. Further, the switching of the projecting piece 52 is performed by pulling up the locking pin 49 and rotating it.

When the large-diameter portion 49A of the locking pin 49 is inserted into the recess 27F of the side wall 27E, the protruding piece 52 is held in an upright posture as shown in FIG. In this state, with the projecting piece 52 being regulated to the projecting state with respect to the opening / closing lid 1, the upper side of the projecting piece 52 comes into contact with the side wall 1E of the opening / closing lid 1, as shown in FIG. Excessive opening movement of the opening / closing lid 1 is restricted.

Further, when the large diameter portion 49A of the locking pin 49 is inserted into the recess 27G of the side wall 27E, the protruding piece 52 is held in a horizontal posture. This state is a state in which the projecting piece 52 is positionally controlled in the retracted state, and the projecting piece 52 is withdrawn from the side wall 1E of the opening / closing lid 1, so that the opening / closing lid 1 can be freely opened and closed. . The projecting piece 52 of the present embodiment has the same configuration as the projecting piece 40 of the first embodiment except that the vertical position and the mounting position are different, and the same reference numerals are given and the description thereof is omitted.

The underground structure 100 according to the second embodiment of the present invention
Is configured as described above, and when the ground R is inclined by the inclination angle θ, holds the projecting piece 52 in a posture that is established upward as shown in FIG. 7. Now, the protruding piece 52
Is brought into contact with the opening / closing lid 1 to restrain its movement.

On the other hand, if the ground R is a horizontal flat surface, the large diameter portion 49A of the locking pin 49 is inserted into the recess 27G of the side wall 27E, and the protruding piece 52 is held in a horizontal posture. In this state, the position of the protruding piece 52 is regulated in the retracted state, the protruding piece 52 retreats from the side wall 1E of the opening / closing lid 1, and the opening / closing lid 1 can freely move.

As described above, the underground structure 1 of this embodiment
According to No. 00, there is an effect that an overrun is prevented when the opening / closing lid 1 is opened / closed and a runaway accident of the opening / closing lid 1 on a slope is prevented. Further, since the position of the projecting piece 40 can be regulated in the projecting state or the immersive state with respect to the frame body, it is caused to function as described above when necessary, and when it is not necessary, it is set in the immersing state and the opening / closing movement of the opening / closing lid and the ground surface are performed. There is an effect that it is possible to move freely to.

Next, a third embodiment of the present invention will be described with reference to FIGS. That is, the upper substrate 13 serving as the guide member of the lifting device J is provided with the projecting piece 60 that can be retracted from the upper substrate. The protruding piece 60 has its boss portion 60A pivotally attached to one side (frame 27 side) in the lateral direction of the upper substrate 13 by a pin 61 and is in a stopped state crossing the upper substrate and a two-dot chain line. It is positioned in the non-stopped state avoiding to the outside as shown by. When the projecting piece 60 is in a stopped state of traversing the upper substrate, it regulates the rolling of the roller 1B of the opening / closing lid 1 which is supported on the upper substrate, and also extends outward as indicated by the chain double-dashed line. In the non-stopped state in which the user has retreated, the roller 1B of the opening / closing lid 1 supported on the upper substrate can be freely rolled.

As shown in FIG. 10, the projecting piece 60 has its boss portion 60A pivotally attached to one side (frame 27 side) of the upper substrate 13 in the lateral direction by a pin 61.
Cross over the upper substrate. Then, as shown by the solid line in FIG. 11, when the protruding piece 60 is placed on the upper edge 27A of the frame body 27 in the non-stopped state where the upper substrate is lowered to the inner wall surface portion 27B provided at the lower position, As shown in FIG. 13, the protruding piece 60 is pushed by the inner wall surface portion 27B to rotate toward the upper substrate side, and the protruding piece 60 in the non-stop state is rotated onto the upper substrate 13 by the inner wall surface portion 27B of the frame body. It is supposed to be restored.

The structure for allowing the protrusion 460 to retreat from the upper substrate 13 is not limited to that described above, but may be rotatable in a horizontal plane, or may be a slide type for parallel movement.

Underground structure 100 of the third embodiment of the present invention
Is configured as described above, and operates as follows. When opening / closing the opening / closing lid 1, as shown in FIG. 9, the opening / closing lid 1 closed and placed in the frame body is horizontally moved while being raised to the same level as the road surface R by the elevating means J in the frame body 27. Operate the opening. When the opening / closing lid 1 is moved up and down, as shown in FIGS.
Since the movement of the roller 1B is constrained across the crossing, the opening / closing lid 1 mounted on the upper substrate is prevented from being inadvertently moved even on a sloped ground having a slope angle θ, thereby enabling safe vertical movement. .

Further, as shown in FIG. 12, when the opening / closing lid 1 is horizontally opened with respect to the frame 27, the protruding piece 6
0 is once withdrawn, and the roller 1B on the lower side (advance side) of the opening / closing lid 1 is passed and moved. Next, the protruding piece 60 is crossed over the upper substrate 13. As a result, the rolling of the upper (rear) roller 1B with respect to the forward direction can be restricted, the overrun of the opening / closing lid 1 can be prevented, and a runaway accident of the opening / closing lid on a sloping ground can be prevented in advance.

Further, when the opening / closing lid 1 is lowered from the upper limit by the lifting device J in the frame 27, as shown by the chain double-dashed line in FIG. The piece 60 is pushed by the projecting inner wall surface portion 27B and is pivotally returned to the upper substrate side. As a result, the opening / closing lid mounted on the upper substrate is surely stopped, and the opening / closing lid can be safely moved up and down.

As described above, the opening / closing lid 1 has an effect of preventing the opening / closing lid 1 on the upper substrate from being inadvertently moved and safely moving up and down even on a sloping ground having an inclination angle θ. Then, when the opening / closing lid 1 is moved in the horizontal direction with respect to the frame body 27, overrun of the opening / closing lid 1 is prevented, and
This has the effect of preventing runaway accidents involving the open / close lid on sloping ground. Furthermore, when the opening / closing lid 1 is lowered into the frame 27, the projecting piece 60 in the non-stopped state is pivotally returned to the upper substrate side, and there is an effect that the opening / closing lid 1 can be surely stopped.

It is needless to say that the present invention is not limited to the above-described embodiment, and design changes can be made within the scope of the invention. For example, the projecting piece 40 and the projecting piece 60 may be provided in combination, or the pair of projecting pieces 40, 40 and the pair of projecting pieces 60, 60 may be only one. Further, the projecting piece 40 and the projecting piece 52 can be position-regulated in the projecting state or the retracted state, and when they are not needed, the retractable state can be opened and closed and the open / close lid can be freely moved on the ground. It may be fixed. Further, the opening / closing lid 1
May have a single-sheet configuration or a multiple-sheet configuration of three or more. Further, it can be applied to a lid for a general manhole or the like other than the electric wire common groove (C.C.BOX). Further, although the protruding pieces 40 and 60 are of a rotary type, they may be of a slide type for moving them forward and backward. Further, the lifting device J shows the upper substrate 13 integrated with the other parts, but the upper substrate and the other parts of the lifting device are configured separately so that the upper substrate can be lifted by the lifting operation. Is also good. Further, the elevating device J is not limited to the device arranged in the frame 27, and may be a device that lifts the open / close lid from the outside of the frame.

[0040]

As described above, according to the underground structure of claim 1 of the present invention, since the projecting piece is provided at the end side in the opening movement direction of the opening / closing lid, the opening / closing lid is arranged in the horizontal direction with respect to the frame body. When the opening moves, the projecting piece contacts the frame at the same time as the opening of the opening / closing lid and regulates its movement, preventing overrun of the opening / closing lid and preventing runaway accident of the opening / closing lid on sloping ground. There is.

Further, according to the underground structure of claim 2 of the present invention, since the projecting piece is provided on the side of the opening / closing lid opening moving direction of the frame, if the projecting piece is brought into the projecting state with respect to the frame, the opening / closing is performed. When the lid is moved horizontally to the frame, the projecting piece comes into contact with the opening / closing lid at the same time when the opening / closing of the opening / closing lid is completed, preventing overrun of the opening / closing lid and preventing runaway accident of the opening / closing lid on sloping ground. It has the effect of preventing it.

Further, according to the underground structure of claim 3 of the present invention, since the guide member of the elevating device is provided with the projecting piece which can be retracted from the guide member, the opening / closing lid mounted on the guide member is inadvertently moved. To enable safe vertical movement. Also,
When the opening / closing lid is horizontally opened with respect to the frame, it is possible to prevent overrun of the opening / closing lid and prevent the runaway accident of the opening / closing lid on a sloping ground.

Further, according to the underground structure of claim 4 of the present invention, the protruding piece pivotally attached to one side of the guide member in the lateral direction is in a stopped state in which it crosses over the guide member and in a non-stopped state in which it has retreated. Therefore, when the opening / closing lid is horizontally opened with respect to the frame body, it is possible to prevent overrun of the opening / closing lid and prevent runaway accident of the opening / closing lid on a sloping ground. Further, when the opening / closing lid mounted on the guide member is lowered, the frame automatically returns the protruding piece in the unlocked state onto the guide member, so when the lifting / lowering device inside the frame lowers the lid from the upper limit, There is an effect that the frame automatically returns the projecting piece in the non-stop state to the guide member even if the user forgets to return it, and the opening / closing lid placed on the guide member can be surely stopped.

[Brief description of drawings]

FIG. 1 is a perspective view showing a moving device of an opening / closing lid that is a first embodiment of the present invention.

FIG. 2 is a plan view showing a moving device of the opening / closing lid according to the first embodiment of the present invention.

FIG. 3 is a front view showing a main part of the first embodiment of the present invention.

FIG. 4 is a front view showing a main part of the first embodiment of the present invention.

FIG. 5 is a cross-sectional view showing the main parts of the first embodiment of the present invention.

FIG. 6 is a cross-sectional view showing the main parts of the first embodiment of the present invention.

FIG. 7 is a perspective view showing a moving device of an opening / closing lid which is a second embodiment of the present invention.

FIG. 8 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 9 is a perspective view showing an opening / closing lid moving device according to a third embodiment of the present invention.

FIG. 10 is a perspective view showing a main part of a third embodiment of the present invention.

FIG. 11 is a cross-sectional view showing the operation of the main parts of the third embodiment of the present invention.

FIG. 12 is a cross-sectional view showing the operation of the main part of the third embodiment of the present invention.

FIG. 13 is a cross-sectional view showing the operation of the main parts of the third embodiment of the present invention.

FIG. 14 is a front view showing the operation of the main part of the third embodiment of the present invention.

FIG. 15 is a plan view showing a moving device of a conventional opening / closing lid.

FIG. 16 is a partial perspective view showing a method of operating the opening / closing lid of the conventional example.

FIG. 17 is a partial front view showing a method of operating the opening / closing lid of the conventional example.

FIG. 18 is a front view showing a conventional method of operating the open / close lid.

FIG. 19 is a front view showing a method of operating the opening / closing lid of the conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Open / close lid 1B Roller 1E Side wall 13 Guide member (upper substrate) 25 Concrete frame 27 Iron frame 27A Upper edge 27B Inner wall surface 30 Electric wire joint groove 40, 52, 60 Projecting piece 43 Support shaft 45 Nut 47 Stop member 49 Engagement Stop pin 51 Spring J Lifting device R Road surface S Internal space θ Inclination angle 100 Underground structure

Claims (4)

[Claims] 1. A frame body provided on an upper portion of an opening of a hole opened to the ground, and an opening / closing lid which is separable from the frame body and placed on the frame body so as to close the opening. An underground structure comprising the opening and closing lid, and a projecting piece capable of engaging with the frame or another opening and closing lid is provided at the end side in the opening movement direction of the opening and closing lid. 2. A frame body provided on an upper portion of an opening of a hole opened to the ground, and an opening / closing lid which is separable from the frame body and placed on the frame body so as to close the opening. An underground structure comprising: a protruding piece that is engageable with the opening / closing lid provided on the opening / closing lid opening movement direction side of the frame body. 3. A frame provided on an upper portion of an opening of a hole opened to the ground, and an opening / closing lid which is separable from the frame and placed on the frame so as to close the opening. And an elevating device capable of raising at least a guide member having a guide surface for abutting against the lower end of the opening / closing lid to horizontally move the opening / closing lid, and an elevating device, An underground structure, characterized in that a protruding piece is provided on the guide surface of the guide member so as to intersect with the opening / closing lid guide direction and is configured to be capable of retracting from the position. 4. The underground structure according to claim 3, wherein the protruding piece is pivotally attached to one side of the guide member in the lateral direction, and is in a stopped state in which it crosses over the guide member and a non-stopped state in which it has retreated. The underground structure is characterized in that the frame body restores the projecting piece that is positioned in the guide member and is not stopped when the opening / closing lid mounted on the guide member is lowered.