JP2721490B2 - Hinge structure of lid for underground structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for an underground structure installed in an opening of a manhole or the like, and more particularly to a cover for a cover body.
Easy opening and closing and removal from the receiving frame
The present invention relates to a hinge structure for a cover for an underground structure .

[0002] The term "cover for underground structures" as used in the present specification refers to a large iron cover, a manhole , which closes an opening between an underground buried object in a sewer, an underground structure facility, and the ground.
Cover, sewage basin, underground facilities equipment and ground for power and communication
Openable and closable iron cover for joints to protect lower cables, power transmission
Under the road surface for iron cover for power distribution, iron cover for power distribution, water supply and gas piping
Door to connect the buried conduit and its accessories to the ground
Fire hydrant cover, water control valve cover, gate valve cover, air
A general term for a valve cover, a gas pipe cover, a water meter cover, and the like.

[0003]

2. Description of the Related Art As a lid for an underground structure installed in an opening such as a manhole, a hinge structure is provided between the lid main body and the receiving frame in order to connect the lid main body to the receiving frame so as to be openable and closable. things Ri you are commonly used, For example other Japanese 59
A hinge structure as described in JP-A-10-2020 is known.

In this hinge structure, a bracket is protruded from the inner periphery of a receiving frame, and an arm as a hinge is pivotally connected to the bracket so that the opening of the receiving frame is widened when the lid is opened. This makes it easy to get in and out of the manhole at the time of the event.

[0005]

In such underground structure lids, when the lid body is damaged or the specifications of its surface pattern are changed, only the lid body is replaced while leaving the receiving frame as it is. ing.

[0006] In the replacement of the lid body, in the above-mentioned publication, the arm is pivotally attached to a bracket on the inner periphery of the receiving frame.
It is necessary to extract the pivot shaft you are. However, the bracket is provided on the inner circumference of the receiving frame,
Therefore, when extracting the pivot shaft, the operator works while looking into the inside of the receiving frame in a posture bent forward from the edge of the receiving frame. Therefore, there is work rather than very the difficulty, is also a risk that the worker will be fall.

According to the present invention , the opening / closing operation and removal of the lid body are performed.
Butterfly on underground structure lid for safe and quick operation
The purpose is to provide a number structure .

[0008]

In order to achieve the above object , a hinge structure of a lid for an underground structure according to the present invention has a rod-shaped hinge seat pivotally mounted on an inner periphery of a receiving frame so as to be able to undulate, and a lid. It is arranged in a hanging manner on the periphery of the lower surface of the main body and swings in the radial direction of
A hinge that is movably disposed, the hinge has a connecting hole through which the hinge seat is slidably inserted, and the hinge has an axial line on the base end side. In addition to forming a rotating sliding part that can rotate around, a restricting sliding part that prevents the hinge from rotating around the axis is formed at the tip end side, and the connecting part is formed at the foremost part of the hinge seat. A hinge is provided which allows the hinge to be removed from the hinge seat only in a state where the hinge is aligned with the longest portion of the inner diameter of the hole.

In such a configuration, the hinge is
It can be arranged on the lid body with the configuration of a ball joint, and a locking portion for preventing the hinge seat from swinging downward can be formed on the inner surface of the receiving frame.

[0010]

[Action] When opening the lid body, release the bite into the receiving frame of the lid body and pull it out to the front side, the hinges arranged on the lower edge of the lid body rotate on the base end side of the hinge seat. It moves from the sliding part to the restricted sliding part on the tip side. In the state where the hinge is located on the restraining sliding portion of the hinge seat, the hinge does not rotate around the axis of the hinge seat, so that the hinge is arranged to be swingable in the radial direction of the lid body. If the hinge is turned upside down and the hinge is arranged in the form of a ball joint, it is turned upside down or swiveled in the horizontal direction to ensure that the lid body is stable. Can be opened. The stopper provided at the foremost portion of the hinge seat prevents the hinge from coming off the hinge seat when the lid body is pulled out.

On the other hand, when replacing the lid body, first,
Invert the lid body in the vertical direction so that the hinge seat of the receiving frame is in the upright position, and the lid body is rotated around the hinge seat axis with the connecting hole of the hinge tool positioned at the rotation sliding part of the hinge seat.
When the stopper is rotated to align the stopper at the foremost portion of the hinge seat with the longest portion of the inner diameter of the connecting hole, the lid body can be removed by lifting the lid body upward.

Further, since the hinge seat is supported by the locking portion on the inner surface of the receiving frame with its tip slightly upward,
The lid body is prevented from falling into the receiving frame when the lid body is opened and closed, and can be easily opened and closed as a guide.

[0013]

1 is a longitudinal sectional view showing a lid for an underground structure having a hinge structure according to the present invention, and FIG. 2 is an exploded perspective view showing a main part of the hinge structure shown in FIG.

In the figure, the lid body 2 has a tapered surface 2
a is supported by fitting into the tapered surface 1a of the receiving frame 1.
Have been . Further, in the illustrated example, in order to prevent rainwater, earth and sand from entering the underground structure, a closing lid structure 3 for closing the central bur hole of the lid main body 2 is provided.

As shown in FIG. 2, a pair of brackets 1b each having a through hole 1d formed in the inner peripheral surface of the receiving frame 2 at a position radially opposed to the closing lid structure 3 of the lid body 2 as shown in FIG.
Is provided. Hinge seat 4 is included and the difference between the Burake <br/> Tsu bets 1b described above the proximal end, as shown in FIG. 3 (a), an insertion hole 4d drilled in the proximal end of the hinge seat 4 And the through hole 1d
DOO insert the bolt 5a in a state of being matched, by screwing the nut 5b thereto, are pivoted to liftable receiving frame 2.

When the hinge seat 4 is raised, the base end side located below the upper edge of the receiving frame 1 is a rotary sliding portion 4a having a circular cross section, and a tip end portion protruding from the upper edge. The side is a rectangular cross section of the constraint sliding portion 4b, and both sides of the tip of the constraint sliding portion 4b are provided with hemispherical stoppers 4 respectively.
c is formed. As shown in FIGS. 1 and 3 (b), the hinge seat 4 is provided with a receiving frame 1 between brackets 1b.
By engaging the base end with the locking portion 1c formed on the inner surface of the, the front end side is maintained in a posture slightly inclined upward.

[0017] underside of the lid body 2, as shown in the bottom view of FIG. 1 and FIG. 4, the lower end face is provided with a pivot支室2b that open mouth in the radial direction by the slit 2c. This pivot room 2b
Has a width capable of accommodating the joint seat 6a of the hinge 6 described later, and the slit 2c is formed to have a smaller width, so that the hinge 6 swings in the radial direction of the lid body 2. Movably pivoted. In the pivot chamber 2b, an insertion hole 2d for inserting the joint seat 6a of the hinge 6 into the pivot chamber 2b is formed at the center side of the lid body 2 so as to communicate with the slit 2c. ing.

As shown in FIG. 2, the hinge 6 has a spherical joint seat 6a at the upper end and a substantially rectangular connecting hole 6b at the lower end. And this
Insert the joint seat 6a into the pivot chamber 2b from the insertion hole 2d.
And attach the stopper 2e incorporated in the insertion hole 2d.
Thereby, it is arranged on the lid body 2 .

FIG. 5 is a longitudinal sectional view of a main part showing a positional relationship between the hinge seat 4 and the hinge 6.

The hinge seat 4 held by the receiving frame 1 is inserted into the connecting hole 6b of the hinge 6 of the lid body 2 as shown in FIG. In FIG. 5, the width of the connecting hole 6b of the hinge 6 is
Opening dimension W of the direction is the width direction of the outer diameter and restraining the sliding portion 4b of the rotary sliding portion 4a of the hinge seat 4 slightly greater than the length, 3
(A), the length between the end faces of both stoppers 4c indicated by X
And shorter than the diagonal length of the cross section of the constraint sliding portion 4b.
doing. Also, the opening dimension H in the height direction of the connecting hole 6b is set.
Is longer than the length X between the end faces of the stoppers 4c.

The dimensions of the connecting hole 6b and the dimensions of the hinge seat 4
Is in the above relationship, the hinge 6 rotates.
It rotates freely around the sliding part 4a and around the restraining sliding part 4b.
Then its rotation is restricted. In addition, the hinge 6 rotates and slides.
Rotation at the position of the portion 4a, the two stoppers 4c
The hinge seat 4
It is possible to insert and remove the hinge part 6 by pushing.

In the above configuration, the receiving frame 1 and the lid body 2
Will be described with reference to FIGS. 6 to 10.

First, burrs are inserted into two left and right burl holes (not shown) provided on the outer peripheral edge of the lid main body 2 to release the fitting between the lid main body 2 and the receiving frame 1. After inserting the crowbar into the closed central crowbar hole, as shown in FIG. 6A, the lid body 2 is pulled out while slightly lifting the lid body 2 in the direction of arrow A from the closed state, and the lower surface of the lid body 2 is placed on the receiving frame 1. Put on. At this time, the hinge 6 is the hinged sliding part 4 of the hinge seat 4.
b, it is held without rotation with respect to the hinge seat 4.

Next, in order to turn over the lid body 2, the edge of the lid body 2 is lifted up by hand and is raised in the direction of arrow B in the figure. Side, but rotate because it is at the position of the constraint sliding portion 4b.
Is maintained without any At this time, the hinge 6 rotates and slides.
When there is a case where it moves to the position of the part 4a,
The hinge 6 can rotate around the rotary slide 4a.
As a result, the lid body 2 also rotates accordingly. Only
Meanwhile, the upper edge of the outer periphery of the lid body 2 and the upper edge of the inner periphery of the receiving frame 1
Because it hits at two points,
6 (b), the posture shown in FIG.
Can be made .

In the operation up to the standing posture in FIG. 7, the hinge 6 is located at the restraining sliding portion 4b of the hinge seat 4, so that
As described above, the lid main body 2 does not rotate around the hinge seat 4, and the lid main body 2 does not fall into the receiving frame 1. Then, when completely flipping the lid body 2 from the state of FIG. 7, the lid body 2 is lifted slightly upward to release the bite of the lid body 2 into the receiving frame 1. Accordingly, since the time of the inversion lid body 2 moves above the hinge member 6 at the same time the hinge seat 4 also gradually erected gradually hinge device 6 will always hinge seat 4
Is located at the constraint sliding portion 4b .

As described above, when the lid body 2 is changed from the posture shown in FIG. 7 to the inverted posture shown in FIG. 8, since the restraining sliding portion 4b is located in the connecting hole 6b, the hinge 6 is not used. It is held without rotating around the hinge seat 4. Therefore, the lid main body 2 does not swing unnecessarily until it is turned over, and the opening operation of the lid main body 2 is simplified.

In the present embodiment, the joint 6 of the hinge 2
Since a is a spherical shape, the lid body 2 is moved in the horizontal direction from the state of FIG.
By turning to the state shown in FIG.
Can also be opened .

In this case, the lid main body 2 pulled out to the state shown in FIG. 6A is pivoted around the joint support 6a by utilizing the fact that the joint 6a of the hinge 6 is a sphere. Turn as center. And, by this turning, the receiving frame 1
When the lid body 2 is positioned so as to be pulled out of the receiving frame 1 in order to widen the opening of the hinge seat 4, the hinge seat 4 stands up in a substantially vertical posture as shown in FIG. At this time, the constraining sliding portion 4b is located in the connecting hole 6b of the hinge 6 so that the hinge 6 is held in a state in which the hinge 6 does not rotate with respect to the hinge 4, so that the opened lid body 2 is also hinged. There is no turning around 4.

FIG. 10 shows a state in which the lid main body 2 is
It shows the procedure of the work to remove from 1 .

When the cover body 2 is removed from the receiving frame 1, the cover body 2 is turned from the state shown in FIG.
Is pulled upward without further inversion, and FIG.
As shown in (a), the outer peripheral edge is placed on the upper end surface of the receiving frame 1 while holding the lid body 2 vertically. In this case, hinge seat 4 is erected substantially vertically as shown in the figure, the hinge member 6 is obliquely downward
In the connecting hole 6b.
The rolling sliding portion 4a is located . Such a positional relationship depends on the axial length of the rotary sliding portion 4a, its outer diameter, and the connecting hole 6a.
This can be achieved by appropriately setting the opening size (corresponding to "H" in FIG. 5) in the height direction of b, the distance between the connecting hole 6b and the joint seat 6a, and the like.

In the state shown in FIG.
Since the hinge 6 can be rotated, the user holds the lid main body 2 and rotates 90 ° clockwise in plan view from the state shown in the figure. Thereby, as shown in FIG. 2B, the outer peripheral edge of the lid main body 2 is in a posture of crossing the peripheral wall of the receiving frame 1 in and out. Therefore, the stopper 4c is initially located in the width direction of the connecting hole 6b of the hinge 6 shown in FIG. 5, but the stopper 4c is located in the height direction.

[0032] In this way, the lid body 2 to hinge seat 4 around 9
When rotated by 0 °, the direction of the stopper 4c is the connecting hole.
6b are aligned in the height direction of FIG.
When the lid body 2 is pulled up from the state shown in FIG.
The hinge 6 can be removed without engaging with c. Therefore, the work of just pulling upwardly rotated 90 ° hinged seat 4 around the After standing in a vertical state to the edge of the receiving frame 1 by opening the lid body 2 can be removed the lid body 2, work safely Moreover, it can be easily performed.

Further, the operation of putting the lid body 2 in the opened state on the receiving frame 1 and closing the lid body 2 is performed after the lid body 2 opened by the reversal shown in FIG. The cover main body 2 is covered so as to hit the upper edge of the receiving frame 1 as shown in FIG. When the lid body 2 is moved in the direction opposite to the arrow A in the figure, the hinge 6
Since the hinge seat 4 inserted into the connecting hole 6b is supported with the tip slightly inclined upward, it functions as a guide, and the lid body 2 can be closed quickly.

Further, it is opened by the horizontal turning shown in FIG.
When the closed lid body 2 is closed , the lid body 2 is slightly moved to the center side of the receiving frame 1 so that the hinge seat 4 is inclined, and the connecting hole 6b is positioned around the restricting sliding portion 4b, so that the hinge 6 Is upright. Thereby, the lid main body 2 can be turned around the hinge seat 4 to be set in the posture of FIG. 6A, and thereafter the lid main body 2 is closed in the manner described above.

In the embodiment, the joint of the hinge 6 is a sphere. However, as shown in FIG. 11, protrusions 7 are formed on the right and left sides so that the hinge can be swung only in the radial direction of the lid body. Good. Also, the cross-sectional shape of the rotary sliding part of the hinge seat is circular,
Although the connecting hole of the hinge is rectangular, the shape and size of the hinge are not limited as long as the hinge can rotate when the rotary sliding portion is located in the connecting hole of the hinge. Although the cross-sectional shape of the constraint sliding part is rectangular,
The shape is not limited to each shape as long as the hinge cannot rotate when the constraint sliding portion is located in the connecting hole of the hinge.

Further, the hemispherical stoppers are formed on both side surfaces of the tip of the hinge seat, but may be formed on one side, and the shape is not limited.

[0037]

According to the present invention, according to the setting of the insertion of the rod-shaped hinge seat into the connecting hole of the hinge, the rotation of the hinge around the hinge seat and the restriction thereof are performed when opening and closing the lid body. By executing, the lid body can be opened and closed in a stable posture. Therefore, in addition to being able to open and close quickly,
Collision with the receiving frame due to unnecessary swinging around of the lid body can be avoided, so that damage to the lid body and the receiving frame during work can be prevented.

After the lid body is opened from the receiving frame and raised, the connecting hole of the hinge is positioned at the rotation sliding portion of the hinge seat, and the hinge is rotated integrally with the lid body around the hinge seat to stop the stopper. As long as the cover body can be removed from the connecting hole, the lid body can be easily removed from the receiving frame by work above the ground surface, so that special tools and complicated work are not required, and workability is improved.

By forming the joint of the hinge into a spherical shape, the lid body can be opened not only by inversion but also by turning, and can be selected according to the installation condition of the underground structure.

Further, by providing a locking portion for holding the hinge seat at a position where the tip is slightly inclined upward, the hinge seat can be quickly fitted into the receiving frame as a guide when the lid body is closed. In addition, since the lid body can be prevented from falling into the receiving frame when the lid is opened, workability is also improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a lid for an underground structure having a hinge structure according to the present invention.

FIG. 2 is a perspective view of a main part showing a structure for attaching a hinge seat to a receiving frame together with a hinge.

3 (a) is a plan view of a main part of the hinge seat, and FIG. 3 (b) is a longitudinal sectional view taken along line AA of FIG. 3 (a).

FIG. 4 is a bottom view of the lid main body showing a pivot chamber portion for attaching a hinge.

FIG. 5 is a front view of a hinge, showing a positional relationship with a hinge seat.

6A and 6B are diagrams showing a procedure for opening the lid body, wherein FIG. 6A shows a state in which the lid body is pulled up to the upper surface of a receiving frame, and FIG. 6B shows a posture before inversion.

FIG. 7 is a longitudinal sectional view showing a state in which the lid body is turned upside down and bites into the inner peripheral edge of the receiving frame in an upright posture.

8 is a longitudinal sectional view of a main part showing a state in which the lid main body is turned over from the state of FIG. 7 and the opening of the receiving frame is fully opened.

FIG. 9 is a longitudinal sectional view of a main part showing a state where the lid main body of FIG.

10A and 10B are diagrams showing a procedure for removing the lid main body from the receiving frame, wherein FIG. 10A shows a state where the lid main body is placed on the upper end of the receiving frame and the hinge seat is set to a substantially vertical posture, and FIG. This shows a state in which the hinge body is set to a posture in which the hinge body can be removed from the hinge seat by turning the lid body.

FIG. 11 is a partially cutaway front view showing another hinge device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving frame 5a Bolt 1b Bracket 5b Nut 1c Locking part 6 Hinge 2 Lid body 6a Joint seat 2b Pivot chamber 6b Connecting hole 3 Closure lid structure 7 Projection 4 Hinge seat 4a Rotating sliding part 4b Restraining sliding part 4c Stopper

Claims (3)

(57) [Claims] 1. A and undulation capable pivotally mounted rod-shaped hinge seat on the inner periphery of the receiving frame, it is arranged in suspended form to the underside periphery of the cap body 且
A hinge provided so as to be swingable in the radial direction of the lid body, wherein the hinge has a connecting hole for slidably passing through the hinge seat, and the hinge seat has a base end. together with the hinge member on the part side forms a rotary sliding part that can be rotated around the axis,該蝶number instrument to the distal end side is formed a restraining sliding portion to prevent rotation about the axis, the該蝶number seat A hinge structure for a lid for an underground structure, wherein a stopper capable of extracting a hinge tool from the hinge seat only in a state of being aligned with a longest portion of the inner diameter of the connection hole is provided at a leading end portion. 2. The hinge according to claim 1, wherein the hinge has a configuration of a ball joint.
2. The device according to claim 1, wherein the device is disposed on the main body.
Hinge structure of the lid for underground structures. 3. An underside of the hinge seat on an inner surface of the receiving frame.
It is characterized by forming a locking part to prevent rocking
The hinge structure of a lid for an underground structure according to claim 1 or 2.