JP2000234345A - Opening/closing inverting device for underground structure cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing inverting device for a cover which allows an engaging hook to be correctly engaged with the projection of a frame automatically when the cover is mounted on the frame, is horizontally rotated easily to release the engagement, and gives no unreasonable force to a lift piece in a hinge mechanism at the time of horizontal rotation. SOLUTION: A slant face 37 is formed on the upper face of the projection 26 of a frame 25, a through-hole 38 is provided at the lower end of the slant face 37, and a lug 43 insertable into the through-hole 38 when a cover 21 is correctly mounted on the frame 25 is provided on the edge section lower face of the cover 21. One side face of the hook section 22 of an engaging hook 23 is formed into a tilt face 44 in the lateral direction, and a lug 39 is provided on the projection 26 of the frame 25 to be engaged with the engaging hook 23 so that the slant face 44 abuts on the lug 39 when the cover 21 is lifted and the lug 39 can push the slant face 44 when the cover 21 is rotated. A hinge mechanism is provided with a grooved lug 29 for supporting the shaft arm 31 of a lift piece 30 on the edge section lower face at the position symmetrical with the suspending position of the engaging hook 23 of the cover 21, and the groove of the grooved lug 29 is set to the height that the shaft arm 31 of the lift piece 30 can be tilted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid opening / closing reversing device comprising an engaging member for a lid and a frame of an underground structure and a hinge mechanism. Underground structures include those generally referred to as manholes, such as underground buried structures in sewers, large iron covers that block openings between underground structures, etc. and the ground, sewage basins, and underground facilities in power and communications. Opening / closing iron cover for joints, power transmission iron cover, power distribution iron cover, underground pipes for water supply and gas pipes, and its auxiliary equipment to protect equipment and underground cables, etc. A fire hydrant lid, a water control valve lid, a partition valve lid, an air valve lid, a gas pipe lid, a water meter lid, and the like having a function, and a frame that supports these lids are collectively referred to.

[0002]

2. Description of the Related Art Conventionally, in an underground structure, as shown in FIG. 7, an outer peripheral edge of a lid 1 is used to prevent the lid from coming off a frame due to generation of gas, sewage or the like. An engaging hook 3 provided with a hook 2 below is suspended on a lower surface of the portion by a support shaft 4 so as to be swingable, and a protrusion 6 is formed on an inner surface wall of a frame 5 of the underground structure.
When the lid 1 is fitted to the frame 5, the engaging hook 3 is pushed by the tip of the protrusion 6 and the hook 2 of the engaging hook 3 escapes toward the center of the lid 1, so that the lid 1 5, the hook 3 hangs down by its own weight, the hook 2 is located below the protrusion 6, and even when the lid 1 is lifted, the hook 2 engages with the protrusion 6 and the lid 1 comes off. I try not to.

[0003] Therefore, in order to be able to remove the lid 1,
A hole 7 is provided at the edge of the lid 1 facing the head of the engaging hook 3. By inserting a rod into the hole 7 and pressing the head of the engaging hook 3, the lower part of the engaging hook 3 is moved. The lid 1 is pivoted toward the center, so that the hook 2 escapes from the protrusion 6 and the lid 1 can be lifted.

On the other hand, a hinge mechanism is provided at an edge of the lid 1 symmetrical to the mounting position of the engaging hook 3 to enable the rotation of the lid 1 and facilitate the work inside the underground structure. In order to enable the lid 1 to be removed, a lifter that can be pulled out and that can be prevented from falling off is used.

[0005] That is, as shown in FIG. 8, the hinge mechanism has a grooved projection 9 having a groove 8 on the lower surface of the edge of the lid 1. 11, the elevator 10 is suspended, and a projection 13 having a long through hole 12 is provided on the inner wall of the frame 5, and the stopper 15 projects from the lower end of the column 14 of the elevator 10. The stopper 15 is passed downward along the longitudinal direction of the hole 12, and the stopper 1 is rotated by rotating the lid 1.
When the position 5 is rotated by 90 degrees, the stopper 15 comes into contact with the lower surface of the protruding portion 13 so that the pillar 14 cannot be pulled out from the hole 12, so that the lid 1 cannot be removed from the frame 5. ing. However, since the column body 14 is long, the lid 1 is turned 180 degrees about the shaft arm 11 and can be opened with the stopper 15 in contact with the lower surface of the protruding portion 13.

However, if the holes 7 are provided in the lid 1, water, soil and the like enter into the underground structure.
As disclosed in Japanese Utility Model Publication No. 7-15880, a notch through which the hook 2 can pass is provided in the projecting portion 6 of the frame 5 at a position slightly away from the engagement position of the engagement hook 3 with the hook 2.
After the lid 1 is slightly rotated to make the hook 2 face the notch, the lid 1 is lifted to release the engaging hook 3 from the protrusion 6.

Further, when the lid 1 is rotated as described above, the hinge mechanism, that is, the projecting portion 13 and the through-hole thereof are provided so that no excessive force is generated between the elevator 10 and the projecting portion 13 of the frame 5. The hole 12 is made large and the through hole 12 is formed in a triangular shape so that the position of the column 14 of the lifter 10 can be moved when the lid 1 is fitted, rotated, and inverted.

[0008]

Problems to be Solved by the Invention
In the opening / closing reversing device for the lid 1 according to the invention of No. 80, the through hole 12 of the projecting portion of the frame of the hinge mechanism has a large triangular shape. Depending on whether there is, there are cases where the engaging hook 3 is engaged with the projecting portion of the frame 5 and cases where it is not engaged. Must. Further, in order to release the engagement between the engaging hook 3 and the protrusion of the frame 5, it is necessary to rotate the lid 1 in the horizontal direction so that the hook 2 of the engaging hook 3 is opposed to the notch of the protrusion 6. Yes,
When the lid 1 is rusted or heavy on the frame 5, a large force is required for rotation. In the hinge mechanism, the through hole 12 of the projecting portion 13 of the frame 5 has a triangular shape, and
Since the column 14 must move in three places, the through hole 12 must be considerably large, and there is a problem in the strength of the peripheral edge of the through hole 12, and the length of the stopper 15 of the lifter 10 is increased. Therefore, there is a problem that the elevator 10 is larger and heavier than the conventional one.

According to the present invention, when the lid is placed on the frame, the engaging hook and the projecting portion of the frame automatically engage properly, and the engagement hook and the projecting portion of the frame are disengaged. The horizontal rotation of the lid 1 is smooth,
An underground structure which does not require a relatively large force and does not require a particularly large through hole 12 of the projection 13 of the frame 5 even in the hinge mechanism, and therefore does not require a particularly large stopper 15 of the elevator 10. The purpose is to provide.

[0010]

Means for Solving the Problems A lid is placed on a frame of an underground structure, and a projection provided on an inner wall surface of the frame and a hook of an engagement hook suspended swingably at an edge of the lid are engaged. And a locking device that releases the engagement between the hook and the projection by horizontally rotating the lid to allow the edge of the lid to be lifted. Equipped with a hinge mechanism in the position,
In an underground structure in which the lid can be turned 180 degrees, an inclined surface is formed on the upper surface of the projecting portion of the frame of the locking device or a projecting portion separately provided on the inner wall of the frame, and the inclined surface is formed to be inclined. Provide a through hole or recess at the lower end of the surface,
On the other hand, on the lower surface of the edge of the lid, a projection is provided which can be inserted into the through hole or the concave portion when the lid is correctly placed on the frame, and which hits the inclined surface when the lid is not properly placed. One side of the hook portion from which the engaging hook projects is a laterally inclined surface, and a projection is provided below the projection of the frame. When the projection raises the edge of the lid, the projection becomes Abuts on the inclined surface of the engaging hook engaged with the hook, and allows the engaging hook to be pushed by sliding the inclined surface when the lid is horizontally rotated. In the hinge mechanism, a grooved projection for supporting the shaft arm of the lifter is provided on the lower surface of the edge at a position symmetrical to the hanging position of the engaging hook of the lid, and the height of the groove of the grooved projection is provided. The height is set to be high enough to make it possible to tilt the shaft arm of the elevator in the grooved area of the grooved projection when the lid is rotated horizontally for unlocking.

[0011]

Embodiments of the present invention will be described with reference to the drawings. That is, as shown in FIG. 1, the underground structure is configured as follows. On the lower surface of the edge of the lid 21,
An engaging hook 23 having a hook 22 is suspended by a support shaft 24, and is located above the hook 22 of the engaging hook 23 when the lid 21 is placed on the frame 25 of the underground structure. A protruding portion 26 that engages with the hook 22 is provided. And
In the lid 21, a bag-shaped concave portion 27 is provided on the edge surface, and the lid 2
1 can be rotated horizontally and a burl can be inserted to facilitate turning the lid 21 180 degrees. The bag-shaped recess 27 is preferably located above the support shaft 24.

On the other hand, on the lower surface of the edge of the lid 21,
A grooved protrusion 29 having a groove 28 is provided at a position symmetric to the position where the groove 4 is provided, and the shaft arm 31 at one end of the lifter 30 is inserted into the groove 28 so that the lifter 30 is grooved protrusion of the lid 21. Hanging on 29.

On the inner surface of the frame 25, a projection 33 having a through hole 32 is provided at a position symmetrical to the position of the projection 26, and the column 34 of the elevator 30 is inserted into the hole 32, A stopper 35 provided at the lower end of the body 34 prevents the body 34 from coming off.

In this underground structure, it is possible to lift the edge of the lid 21 by slightly rotating the lid 21 slightly horizontally to separate the hook 22 of the engaging hook 23 from below the projection 26 of the frame 25. The basic function of the shaft arm 31 of the lifter 30 is to enable the lid 21 to be turned 180 degrees as the axis of the lid 21.

In the present invention, the following new mechanism is further added to the above basic mechanism. That is, it is not necessary to check that the lid 21 is correctly placed by lifting the lid 21. Further, the lid 21 is horizontally rotated and lifted.
It has been made possible to easily, smoothly and without difficulty in inverting 0 degrees. The embodiment is as follows.

First, as shown in FIG. 2, the projecting portion 26 of the frame 25 is provided so as to project from the inner wall surface of the frame 25, and the lower surface thereof is an engaging surface 36 of the engaging hook 23 with the hook 22. An inclined surface 37 descending from the inner wall surface of the frame 25 is formed on the upper surface of the projecting portion 26, and a through hole 38 or a concave portion into which a projecting portion 43 on an edge lower surface of the lid 21 described later is provided at the lower end thereof. Then, a projection 39 is provided on one of the lower sides of the projection 26 to abut on an inclined surface of the engagement hook 23 described later.

On the other hand, a bag-shaped recess 27 provided at the edge of the lid 21
As shown in FIG. 3, two support arms 40 are provided below, and a lateral groove 41 that opens toward the center of the lid 21 is provided on the facing surface side of each support arm 40, and a screw hole that passes through the middle thereof 42 are provided. The lateral groove 41 is the support shaft 2 of the engagement hook 23.
4 can be slidably inserted, and the screw hole 42 is for screwing in the screw to prevent the support shaft 24 from coming off.

A projection 43 is provided on the lower surface of the edge of the lid 21 near the outer periphery of the lid 21 opposite to the middle of the two support arms 40 and can be inserted or fitted into the through hole 38 or the concave portion. When the projection 43 is inserted and fitted into the through hole 38 or the recess, the hook 22 of the engagement hook 23 is correctly
The set position is determined so as to be located below the protrusion 25 of the fifth.

As shown in FIG. 4, the engaging hooks 23 have support shafts 24 projecting from both sides of the upper end thereof, hooks 22 projecting from one surface of the intermediate portion or lower portion, and the upper surface or the tip of the hook 22 has a frame. The projection 25 abuts on and engages with the engagement surface 36 on the lower surface of the projection 26. One side surface of the protruding hook 22 is defined as a laterally inclined surface 44. The inclined surface 44 is pivotally supported by inserting the support shaft 24 into the lateral groove 41 of the support arm 40 on the lower surface of the lid 21 with the hook 22 facing the frame 25 and swingably supporting the lid 21 by lifting the edge of the lid 21. When the upper surface or the tip of the projection 22 engages with the engagement surface 36 on the lower surface of the projection 26, the projection 39 provided on the projection 26 of the frame 25 faces the side of the hook 22 so as to face a lower part of the inclined surface. Provide.

FIG. 5 shows a state in which the lid 21 is closed and the projection 43 of the lid 21 is closed.
Is inserted into the through hole 38 of the projecting portion 26 of the frame 25, and the engaging hook 23 and the projecting portion 26 of the frame 25 are engaged. That is, the lateral groove 41 of the support arm 40 of the lid 21
Then, when the support shaft 24 of the engaging hook 23 is inserted and slid into the depth of the lateral groove 41 and a screw 45 is provided in the screw hole 42 to prevent the engaging hook 23 from coming off, the engaging hook 23 is supported on the support arm 40 so as to be swingable. Is done.

Next, when the lid 21 is lowered onto the frame 25, the engaging hook 23 is pushed by the tip of the protruding portion 26 of the frame 25 and rotates around the support shaft 24 in the direction opposite to the rotation direction of the clock hand in the figure,
When the tip of the projection 26 is separated from the tip of the hook 22, the engagement hook 23 is released from the pressing of the projection 26, and rotates around the support shaft 24 in the same direction as the clock hand in FIG. The tip and the upper surface are located below the engagement surface 36 on the lower surface of the protrusion 26. As a result, even if the lid 21 is lifted, the tip or upper surface of the hook 22 comes into contact with the engagement surface 36, and the hook 21 cannot be lifted further. That is, the lid 21 cannot be opened.

When the lid 21 is lowered, the projection 43 on the lower surface of the edge of the lid 21 slides down the inclined surface 37 on the upper surface of the projection 26 of the frame 25 and is inserted or fitted into the through hole 38 or the recess. Then, the lid 21 naturally fits properly into a predetermined position of the frame 25, and the tip or upper surface of the hook 22 of the engaging hook 23 is correctly positioned below the protrusion 26.

In order to lift the edge of the lid 21 and invert it 180 degrees, insert the tip of a crowbar into the bag-shaped recess 27 of the lid 21 and hold the hand with the crowbar as a lever and the upper edge of the frame 25 as a fulcrum. The edge of the lid 21 is lifted, and the hook 22 of the engaging hook 23 comes into contact with the engaging surface 36 on the lower surface of the projecting portion 26 of the frame 25, and is not further lifted. At this time,
The inclined surface 44 of the engaging hook 23 is a projection 39 on the lower surface of the edge of the lid 21.
Abut.

Next, when the cover 21 is turned in the direction of the protrusion 39 with a burl, the engaging hook 23
9, the contact position between the projection 39 and the inclined surface 44 shifts toward the tip of the hook 22, and finally, after passing the tip of the hook 22, the tip of the hook 22 separates from the engagement surface 36, and The engagement between the hook 23 and the projection 26 of the frame 25 is released.
Therefore, when the lid 21 is lifted with a crowbar, the edge of the lid 21 can be lifted, and further, the shaft arm 31 of the lifter 30 can be turned 180 degrees about the fulcrum.

On the other hand, the hinge mechanism for inverting the lid 21 by 180 degrees is provided at the position of the lid 21 and the frame 25 which are symmetrical with the hanging position of the engaging hook 23 as described above.

The grooved projection for supporting the shaft arm of the elevator in the hinge mechanism is, as shown in FIG. 8, the height of the groove is almost equal to the diameter of the shaft arm. Can't tilt. Therefore, if the lid is rotated in the horizontal direction to release the engagement between the engaging hook and the projecting portion of the frame, an excessive force is applied to the shaft arm. The through hole of the projecting portion of the frame into which the body is inserted is formed as a large triangle, so that the column can move to the three tips of the triangle when the lid is horizontally rotated, so that an excessive force is not applied.

In the present invention, the grooved projection 29 of the lid 21 is provided.
The height of the groove 28 is made larger than the diameter of the shaft arm 31 of the lifter 30 with a margin, so that the shaft arm 31 can be inclined. Although this inclination angle is not limited, it is preferably about 15 degrees, and is about 17 degrees in FIG. 6 (B). Therefore, as shown in FIG. 31 is about twice the diameter. However, depending on the length of the shaft arm 31, the height of the groove 28 is higher than shown in the figure,
It can also be lowered.

The through hole 32 of the protruding portion 33 of the frame 25 does not need to be triangular, and may be any length as long as the stopper 35 of the elevator 30 can pass and the column 34 can pass.

FIG. 6B shows the state of the lift 30 when the lid 21 is rotated horizontally to release the engagement between the engagement hook 23 and the projection 26 of the frame 25. It is. Lid 2
1 is rotated horizontally, the grooved projection 29 of the lid 21 and the frame 25 are rotated.
Has a vertical up-down relationship with the projection 33, but the grooved projection 29 moves to shift the up-down relationship between the two. Therefore, the column body 34 of the elevating element 30 has the through hole 3
The support 34 is inclined by the edge of the shaft arm 31,
Are also inclined in the groove 28. That is, with the rotation of the lid 21, the shaft arm 31 also needs to be tilted in order to allow the column 34 to tilt, and the groove 28 is tilted so that the shaft arm 31 can tilt.
The height is high.

The greater the inclination of the column 34 of the lift 30, the smaller the force applied to the lift 30 by the horizontal rotation of the lid 21. In the case where the width of the through hole 32 of the projecting portion 33 of the frame 25 is constant and the diameter of the column 34 of the elevator 30 is also constant, the inclination angle of the column 34 increases as the distance between the grooved projecting portion 29 and the projecting portion 33 increases. Becomes larger. Therefore, it is preferable to provide the projection 33 of the frame 25 as far as possible from the lower end of the grooved projection 29 of the lid 21. FIG. 6C shows a state where the lid 21 is turned 180 degrees.

When the projecting portion 33 of the frame 25 and the lower end of the grooved projecting portion 29 of the lid 21 are made as far as possible, the inverted lid 21 is again turned 180 degrees to the original state. That is, in order to easily place the lid 21 correctly on the frame 25, FIGS.
As shown in FIG.
It is preferable that a ridge 45 is provided on the inner wall surface side of 5 so that the lower surface of the grooved projection 29 of the lid 21 can slide on the upper surface thereof.

[0032]

According to the present invention, when the lid is placed on the frame, the projection on the lower surface of the edge of the lid slides down the slope of the projection of the frame and naturally enters the through hole or recess of the projection. Thus, since the hook of the engaging hook is correctly positioned below the protrusion, it is not necessary to lift the edge of the lid to check whether the hook comes into contact with the protrusion.

According to the present invention, when the edge of the lid is lifted, the inclined surface provided on one side of the hook of the engaging hook comes into contact with the projection provided on the projection of the frame, and the lid is rotated horizontally. Sometimes, the protrusion pushes the inclined surface and pushes the hooks of the engaging hooks sequentially diagonally upward and sideways, so that the lid can be rotated horizontally with a small force, and when the hook separates from below the protrusion, the hook It is more free and allows the lid edge to be lifted.

In the hinge mechanism according to the present invention, the height of the groove of the grooved projection for supporting the shaft arm of the lifter provided on the lower surface of the edge of the lid is determined by the engagement hook and the projection of the frame. The height of the lid should be sufficient to allow the gap between the grooved projection due to the horizontal rotation for releasing the engagement and the projection of the frame below it, and hence the inclination of the shaft arm of the elevator. This prevents excessive force from being applied to the lifter by the movement.

[Brief description of the drawings]

FIG. 1 is a sectional view of an underground structure.

FIG. 2A is a plan view of a main part of an edge of a frame, and FIG.
Is a cross-sectional view thereof, and (C) is a cross-sectional view of a protruding portion.

3A is a cross-sectional view, FIG. 3B is a side view, and FIG. 3C is a bottom view of a main part of the lid rim.

4A is a side view, FIG. 4B is a front view, and FIG.
(C) is a plan view.

5A is a cross-sectional view and FIG. 5B is a rear view of a main part of the underground structure showing a locked state when the lid is placed on a frame.

FIG. 6A is a cross-sectional explanatory view showing a relationship between a shaft arm of a lifter supporting a lifter with a grooved protrusion and a groove of a grooved protrusion;
(B) is a principal part sectional view showing the relationship between the lifter and the grooved projection and the projection of the frame when the lid is rotated in the horizontal direction,
(C) is a principal part sectional view showing the relationship when the lid is inverted.

FIG. 7 is a cross-sectional view of a main part of an underground structure showing a locked state when a lid is placed on a frame in the related art.

FIG. 8 (A) is a diagram for supporting a conventional elevator.
The bottom view of the grooved projection on the lid edge, and (F) is a cross-sectional view of the conventional hinge mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Cover 22 Hook 23 Engagement hook 24 Support shaft 25 Frame 26 Projection 27 Bag-shaped recess 28 Groove 29 Groove projection 30 Elevator 31 Shaft arm 32 Through hole 33 Projection 34 Column 35 Stopper 36 Engagement surface 37 Slope Surface 38 Through hole 39 Projection 40 Bearing arm 41 Lateral groove 42 Screw hole 43 Projection 44 Inclined surface 45 Projection

Claims (4)

[Claims] 1. A lid is placed on a frame of an underground structure, and a projection provided on an inner wall surface of the frame is engaged with a hook of an engagement hook suspended swingably at an edge of the lid. A locking device that releases the engagement between the hook and the projection by horizontally rotating the hook and allows the edge of the lid to be lifted, and a hinge mechanism at a symmetrical position between the engagement hook and the projection. In the underground structure capable of inverting the lid by 180 degrees, an inclined surface which inclines and descends is formed on the upper surface of the projecting portion of the frame of the locking device or the projecting portion separately provided on the inner wall of the frame. , A through hole or a recess is provided at the lower end of the inclined surface,
On the other hand, the lower surface of the edge of the lid is provided with a projection which can be inserted into the through hole or the concave portion when the lid is correctly placed on the frame, and which hits the inclined surface when the lid is not properly placed, One side of the hook portion from which the hook protrudes is a laterally inclined surface, and a projection is provided below the projection of the frame. When the projection raises the edge of the lid, the projection engages with the projection. Abutting against the inclined surface of the engaging hook, and allowing the sliding surface to slide and press the engaging hook when the lid is horizontally rotated; and in the hinge mechanism, the engaging hook of the lid is in a suspended position. A grooved protrusion for supporting the shaft arm of the lifter is provided on the lower surface of the edge at the symmetrical position, and the height of the groove of the grooved protrusion is set at the time of horizontal rotation of the lid for unlocking. In particular, the height of the shaft arm of the lifter is set to be high enough to make it possible to incline the grooved protrusion in the groove. Underground structures to be. 2. A projecting portion of the frame for engaging with the engaging hook, or a projecting portion separately provided on the inner wall of the frame is provided with an inclined surface which is inclined downward and is formed at a lower end of the inclined surface. A through-hole or a recess is provided, and on the lower surface of the edge of the lid, a protrusion that can be inserted into the through-hole or the recess when the lid is correctly placed on the frame and that hits the inclined surface when the lid is not properly placed is provided. Underground structure provided. 3. One side of a hook portion from which an engaging hook projects is formed as a laterally inclined surface, and a projection is provided below the projecting portion of a frame for engaging with the engaging hook. When the protrusion lifts the edge of the lid, the protrusion comes into contact with the inclined surface of the engaging hook engaged with the projecting portion, and the horizontal surface of the lid can slide on the inclined surface to push the engaging hook. An underground structure characterized by: 4. A hinge mechanism for rotating a lid, wherein a grooved projection for supporting a shaft arm of a lifter is provided on a lower surface of an edge at a position symmetrical to a hanging position of an engaging hook of the lid. The height of the groove of the grooved projection is sufficient to allow the shaft arm of the elevator to tilt in the groove of the grooved projection when the lid is rotated horizontally for unlocking. An underground structure characterized by its height.