JP2796064B2 - Lid for underground structures - 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 such as a manhole cover and, more particularly, to a hinge structure in which a cover body can be easily opened from a receiving frame.

The term "cover for underground structures" as used in the specification of the present application refers to a manhole cover, a large iron cover, a sewage basin cover that closes an opening between an underground buried object, underground structure facility, etc. and the ground in sewage. Opening / closing iron covers for underground facilities, underground cables in power and communication, open / closed common gutters, power transmission iron covers, power distribution iron covers, underground pipes for water supply and gas piping, and their auxiliary equipment and ground equipment A fire hydrant cover, a water control valve cover, a partition valve cover, an air valve cover, a gas pipe cover, a water meter cover, and the like having a function as an opening / closing door connecting the above.

[0003]

2. Description of the Related Art As a cover for an underground structure such as a manhole cover , as described in Japanese Utility Model Publication No. 5-10034, for example, as described in Japanese Utility Model Publication No. 5-10034, in order to connect the cover body to a receiving frame so as to be able to open and close. The one provided with a hinge structure between the main body and the receiving frame is generally used.

[0004] The most basic hinge structure for connecting the lid body to the receiving frame, including the one described in this publication, is provided with a connecting seat projecting slightly from the inner peripheral surface of the receiving frame toward the center. The lower surface is provided with a hinge fitting rotatably inserted into a hole formed in the connecting seat. In addition, in order to make the opening portion of the receiving frame wider, for example, those in which the connecting seat itself can be rotated up and down with respect to the inner peripheral wall of the receiving frame are known. The lid is opened by turning horizontally.

[0005]

However, for example, when a receiving frame is installed on a stepped portion at the boundary of a sidewalk where the side of the sidewalk is higher than the side of the road, the receiving frame is adjusted to the level of the road. , The surface facing the sidewalk is surrounded by steps. When opening the lid for the underground structure in such a position, the hinge metal side is set so as to come to the stepped portion so that the operation of unlocking and locking the lid main body and the receiving frame can be performed. I have. At this time, although the lid main body can be raised halfway to the side facing the step, the lid main body cannot be turned upside down until the entire opening of the receiving frame is opened due to the step. In addition, since this reversal is not possible, it is impossible to open the lid by turning horizontally.

As described above, in the case of the conventional underground structure lid, when the receiving frame is installed on a road surface having no step ,
While it is possible to open the lid by inversion and water Hira旋 times, the like when installed a receiving frame at the boundary between the walking road, it can not be open lid in operation by such inversion and horizontal turn.

A problem to be solved in the present invention is to make it possible to quickly open and close the lid body irrespective of the installation conditions of the underground structure.

[0008]

According to the present invention, a hinge fitting is provided at a peripheral edge of a lid body fitted to a receiving frame, and a lower end of the hinge fitting is provided with an engaging projection provided on an inner periphery of the receiving frame. A bag-like shape provided with an engaging claw that is engageable from the top, a spherical head provided at the upper end of the hinge hardware, and the spherical head provided on the back surface of the lid body so as to be rotatable around its core. The hinge holder is connected to the hinge mounting seat, and a hinge holder that restrains the spherical head is detachably provided in the hinge mounting seat.
A horizontal swivel non articulated the hinge fittings are relative to the cover body
Relationship walk at least horizontal pivotable articulated relationship noise
It is characterized in that it is configured to be selectable .

Further, a guide rib is provided on the back surface of the lid body so that the amount of protrusion from the lower surface of the lid body gradually decreases toward an edge on the side radially opposite to the side where the hinge hardware is provided. It is also possible to adopt a configuration slidably provided along the upper edge of the receiving frame.

[0010]

[Function] By pulling up the edge of the lid body on the side facing the hinge hardware in the radial direction, and pulling it further while supporting the weight of the lid body in the receiving frame, it is possible to move the hinge body downward from the pulled-out side to the hinge hardware side. The protruding guide rib, whose length protrudes, moves along the upper edge of the receiving frame. In other words, the lid opening operation is performed while sliding while the entire weight of the lid main body is left in the receiving frame.

In addition, the hinge holder and the spherical metal head of the hinge hardware
By changing the connection method, the hinge hardware can be
To make it impossible to turn horizontally or at least to be able to turn horizontally.
Ru can be used to select one of the Rukoto.

[0012]

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

In FIG. 1, a lid body 2 is fitted and supported by a tapered surface 1a, 2a with respect to an installed receiving frame 1. In the illustrated example, the lid body 2 is locked to the receiving frame 1 by a conventionally known locking device 3 in order to prevent a person other than the management worker from entering the underground structure. A sealing lid 4 provided with a packing 4a for sealing is provided on the outer peripheral portion.

FIG. 3 is a schematic perspective view showing the state where the lid main body 2 is inverted.

As shown in FIG. 1, a cover 2 for surrounding and protecting the entire lock 3 is provided on the edge of the lid main body 2.
b is provided. The cover 2b is formed in a bag shape with the tapered surface 2a side opened, and has a flat bottom surface. Also, at a position facing the cover 2b in the radial direction,
A hinge mounting seat 5 for connecting a hinge hardware described later is provided, and a rib 2c for reinforcement is provided on the lower surface of the lid body 2.

The ribs 2c are arranged in a girder shape with a longitudinal cross-sectional shape in which the length protruding downward toward the center of the lid body 2 is gradually increased. Further, a part of the rib 2c running on the hinge mounting seat 5 side from the center of the lid main body 2 in a direction orthogonal to the radial direction connecting the hinge mounting seat 5 and the cover 2b has a longer protruding length. It is formed as two turning guide ribs 2d. These turning guide ribs 2d are each formed with a grounding portion 2e having a maximum length protruding downward. The lower end surface of the grounding portion 2e is equal to the level of the bottom surface of the cover 2b. When the cover is opened without being inverted, the lid body 2 is supported by the two grounding portions 2e, 2e and the cover 2b.

Further, a guide rib 2f is provided between the turning guide rib 2d and a rib 2c arranged substantially in parallel. These guide ribs 2f are arranged so as to be parallel to the radial direction connecting the cover 2b and the hinge mounting seat 5 from the ground contact portion 2e of the turning guide rib 2d.

Returning to FIG. 2, the hinge mounting seat 5 has a hinge hardware 6 and a hinge holder 7 for holding the same in the hinge mounting seat 5.
Is incorporated. 4 is a detailed view of the hinge mounting seat 5, and FIG. 4 (a) is a bottom view and FIG. 4 (b) is a front view as viewed from the tapered surface 2a side.

The hinge mounting seat 5 is provided on the tapered surface 2a of the lid body 2.
A mounting hole 5b is formed in the bottom wall 5a of the bottom wall 5a, through which the hinge hardware 6 and the hinge holder 7 can be inserted, and a slit 5c extends outward from the mounting hole 5b. It is an incision. The upper surface along the opening edge of the slit 5c is formed as a sliding surface 5d for pivotally supporting the hinge hardware 6. Further, a through hole 5e having an opening axis perpendicular to the incision direction of the slit 5c is formed in the peripheral wall of the hinge mounting seat 5.

FIG. 5 is an exploded perspective view showing the hinge hardware 6 and the hinge holder 7 together with their connecting members.

The hinge hardware 6 has a spherical head 6a at the upper end, and forms an engagement claw 6c extending from the cylindrical constricted portion 6b having a reduced outer diameter to the lower end and protruding substantially in an L-shape. The engagement claw 6c has a pair of protrusions 6d protruding left and right on the base end side. The spherical head 6a has an outer diameter capable of rolling and connecting inside the hinge mounting seat 5 of the lid body 2, and the constricted portion 6b has an outer diameter such that it can freely pass through the slit 5c. A hinge mounting seat 5 is provided on the spherical head 6a.
Notch 6 on the side facing the center of lid body 2 when assembled
e is cut in the vertical direction.

The hinge retainer 7 has an upper end surface having an arc shape matching the inner peripheral wall of the hinge mounting seat 5, and a lower end surface having a mounting hole 5b.
The annular seat 7a that fits into the
An opening 7b matching the through hole 5e of the hinge mounting seat 5 is formed in the peripheral wall of the annular seat 7a. On both aspects of the hinge presser 7, the pressure receiving surface 7d to rollably sliding support is the sphere head 6a on one as the concave curved surface equal to the outer diameter of the sphere head 6a hinge fittings 6 and the other Is formed with a pressure receiving surface 7c provided with a ridge 7e in the longitudinal direction, and a projection 7f is provided below the pressure receiving surfaces 7c and 7d so as to abut on the constricted portion 6b of the hinge hardware 6.

The ridge 7e has such a width that it can be loosely fitted into the notch 6e of the spherical head 6a, and as shown in the plan view of FIG. 6, the ridge 7e is inserted into the notch 6e. As a result, the surface of the spherical head 6a can be brought into contact with the pressure receiving surface 7c. Therefore, the hinge hardware 6 has the ridge 7 e of the hinge presser 7 fixed in the hinge mounting seat 5 and the spherical head 6.
a, the horizontal turning is restricted, and
f contacts the constricted portion 6b and the tapered surface 2 of the lid body 2
The vertical rotation is also restrained by a. Therefore, the hinge hardware 6 used in this way has the same action as the lock.

On the other hand, if the pressure receiving surface 7d hinged presser 7 as the posture which is horizontally inverted from the state of FIG. 6 is an assembly that faces the spherical head portion 6a, regulations protrusion 7e is not. For this reason, the hinge hardware 6 can rotate around the hinge hardware 6 in the hinge mounting seat 5, and when the connecting seat described later is attached to the receiving frame 1, the lid main body 2 is horizontally turned around the hinge hardware 6 as a fulcrum. be able to.

The hinge hardware 6 is incorporated by inserting the spherical head 6a from the mounting hole 5b as shown in FIG. 2 and then inserting the constricted portion 6b into the slit 5c. At this time, the spherical head 6a is supported on the sliding surface 5d, and the hinge hardware 6 itself can rotate vertically and rotate around the center of the constricted portion 6b with respect to the hinge mounting seat 5.

Next, the hinge retainer 7 is inserted so that its annular seat 7a fits completely into the mounting hole 5b, and the through hole 5e of the hinge mounting seat 5 and the opening 7b of the hinge retainer 7 are aligned. Then, the bolt 8a is passed through the through hole 5e and the opening 7b.
Through the washer 8c and the nut 8b to the bolt 8a.
, The hinge holder 7 can be mounted in the hinge mounting seat 5.

The orientation of the hinge retainer 7 is appropriately determined according to the place where the underground structure lid of the present invention is grounded. Is the direction in which the ridge 7e faces the spherical head 6a.
The hinge retainer 7 by Rukoto held in hinge mounting seat 5 by a bolt 8a · nuts 8b, as shown in FIG. 6, ridges 7e is a state that has entered into the cutout 6e, by a hinge presser 7 The movement of the spherical head 6a in the horizontal turning direction and the vertical direction is restricted.

FIG. 7 is a longitudinal sectional view of a main part when the cover main body 2 in which the hinge hardware 6 and the hinge retainer 7 are assembled in the above-mentioned direction is fitted to the receiving frame 1, and FIG. (B) of FIG. 3 shows the state of the lid body 2 when the lid body 2 is displaced when the lift A is applied from the inside of the underground structure.

The hinge hardware 6, which is supported by inserting the spherical head 6a into the hinge mounting seat 5, takes the position shown in the drawing due to its own weight, and has the engaging claw 6c at the lower end formed on the inner peripheral side of the receiving frame 1. It faces the recess 1c. The receiving frame 1 is provided with an engaging projection 1b at a portion located directly above the engaging claw 6c to prevent the lid main body 2 from rising due to the lifting pressure. As is apparent from FIG. 2, the engagement protrusion 1b has a cross-sectional shape in which a part of the inner peripheral wall of the receiving frame 1 is bent downward in a hook shape.

The manner in which the lid body 2 is opened from the receiving frame 1 provided at the step D at the boundary between the road B and the sidewalk C in the above configuration will be described with reference to FIGS.

First, after unlocking the lock 3 with a dedicated jig, burs are inserted into two burl holes (not shown) provided on the outer peripheral edge of the lid body 2 near the lock 3. Then, the lid main body 2 is pulled out while slightly lifting the lid main body 2 in the arrow direction from the closed state of FIG. At this time, as shown in FIG. 7A, the engaging claw 6c of the hinge hardware 6 is engaged with the engaging protrusion 1b.
Ri Ah below the lid body 2 because it is not connected to the receiving frame 1, the drawer operations are rapidly performed.

The lid body 2 is, as shown in FIG.
The lower surface of the cover 2b is brought into an oblique posture so as to contact the upper surface of the receiving frame 1, and the lid body 2 is further pulled out of the receiving frame 1. At this time, the rib 2c comes to be placed on the upper end of the receiving frame 1 instead of the bottom surface of the cover 2b, and the guide rib 2f comes into contact with the receiving frame 1 as shown in FIG.

As shown in FIG. 3, since the guide rib 2f has a lower surface inclined downward in the radial direction from the cover 2b, the lid body 2 is pulled out from the state shown in FIG. 2 itself moves to the receiving frame 1 gradually. Therefore, there is no need to pull out the lid body 2 while lifting it, and work can be performed while depositing the weight of the lid body 2 in the receiving frame 1, and the work load can be reduced.

When the lid body 2 is further pulled out of the receiving frame 1 after the state shown in FIG. 9A, as shown in FIG.
The grounding portion 2e of the turning guide rib 2d at one end of the guide rib 2f moves onto the road surface. Since the level of the lower end of the grounding portion 2e and the lower end of the cover 2b are the same, the lid body 2 is supported on the road surface at three points as shown in FIG. Thereafter, as shown in FIG. 10, by moving the lid main body 2 in a direction away from the receiving frame 1, the entire receiving frame 1 can be opened and the lid can be opened.

The operation of closing the lid with the lid main body 2 placed on the receiving frame 1 from the open state of FIG. 10 may be performed in the reverse order of the lid opening operation. At this time, it is necessary to work with care so that the hinge fitting 6 is housed in the recess 1c.

[0036] Thus, without horizontal turn or to anti <br/> rolling with the lid body 2 with respect to receiving frame 1 can open the lid in the work only to withdraw from receiving frame 1 slightly lift the end. For this reason, even when the receiving frame 1 is installed in a portion having a step D at the boundary between the sidewalk C and the road B, the lid body 2 can be opened and closed without any trouble.

Further, when the hinge retainer 7 is incorporated, the posture shown in FIG.
It can also be installed so that it faces each other. In this case, since there is nothing to engage with the notch 6e of the spherical head 6a, the spherical head 6a is merely spherically joined by the hinge retainer 7, but the projection 7f comes into contact with the constricted portion 6b and is tapered. Since the surface 2a is in contact, the hinge hardware 6 can only rotate horizontally with respect to the hinge mounting seat 5.

Therefore, for example, in the hinge structure proposed by the present applicant as Japanese Patent Application No. 6-15578, the hinge fitting 6 of the present invention is applied, and the connecting seat is connected to the receiving frame 1 so as to be vertically rotatable. If the hinge hardware 6 is connected to a normal hinge structure, the lid body 2 can be operated to rotate horizontally. At this time, since the inclined lower surface of the guide ribs 2f and swing guide ribs 2d is moves along the edge of the receiving frame 1 can be horizontally pivot in a state where deposits on the total weight of the lid body 2 to receiving frame 1.

That is, when the lid main body 2 is opened by horizontally turning, the outer slope of one of the turning guide ribs 2d is brought into contact with the edge of the receiving frame 1 until the ground contact portion 2e and the guide rib 2f climb over the receiving frame 1. Turn. Next, if the cover body 2 is rotated as it is, the lid body 2 side located in the receiving frame 1 tends to fall into the receiving frame 1, so that the cross-shaped rib 2 c abuts on the edge of the receiving frame 1, and the ground contact portion 2 e and the turning guide rib 2
The cover is opened by turning until d gets over the receiving frame 1.

Next, when the lid is closed from the above-described state, when the other grounding portion 2e is turned until it is positioned in the receiving frame 1, one side of the lid body 2 located in the receiving frame 1 falls into the receiving frame 1. For this reason, the slope of the guide rib 2f comes into contact with the edge of the receiving frame 1, and then the cross-shaped rib 2c comes into contact with the edge of the receiving frame 1. When it is further turned, the outer slope of one of the turning guide ribs 2 d closes while abutting on the edge of the receiving frame 1.

[0041] There thus, by choosing whether against spherical head 6a receiving surface 7c of the hinge retainer 7 is made to face one of 7d, with the hinge fittings 6 non horizontal pivot
Can be attached to the lid main body 2 so as to be able to perform any of horizontally pivotable movements. Therefore, in the case where the lid main body 2 cannot be opened by horizontal rotation, the ridge 7e of the hinge retainer 7 as shown in the previous embodiment is replaced with the hinge hardware 6.
In a site where horizontal turning is also possible, it is possible to cope with a built-in structure in which the pressure receiving surface 7d is oriented toward the spherical head 6a.

Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment. For example, if the lower surface and the ground portion of the guide rib is provided rolling bodies such as rollers or bearings, it is possible to soften the interference between the surface of such edge or roadway receiving frame when the lid opening and during closing, the operation Can be performed more easily.

The hinge fittings cases you open the lid pull the lid body, because that is impossible water Hira旋 times for the lid body, as described in JP Utility Model 60-32220,
A parallel guide plate rib for hinge hardware support is provided in parallel on the back of the lid body, and pivot pins protruding on both upper side surfaces of the hinge hardware are inserted into the guide plate ribs to prevent the hinge hardware from coming off and horizontal turning. For example, a hinge hardware provided with a swing prevention device may be used.

In the above-described embodiment, when the hinge hardware 6 is attached to the lid main body 2 so as to be able to turn horizontally and is connected to the connecting seat provided on the receiving frame 1, the hinge hardware 6 is vertically moved by the protruding piece 7f and the tapered surface 2a. Although it is not possible to rotate in the direction,
When the slit 5c of the lid body 2 is extended and the tapered surface 2a is cut out, the hinge hardware 6 can be turned up and down, so that the lid can be opened by inversion.

[0045]

According to the present invention, when the lid cannot be opened by reversing or turning horizontally, the edge of the lid body on the side facing the hinge hardware in the radial direction is slightly lifted and pulled out from the receiving frame. The lid can be opened by sliding the upper edge of the receiving frame using the guide ribs formed on the back surface. Therefore, the lid can be opened while the weight of the lid body remains in the receiving frame, and the work load can be reduced.

[0046] Further, by changing a connecting method between the ball head of the hinge retainer and hinge fittings, either a horizontal swivel or horizontal turn impossible against the lid body hinge fittings
Can be selected according to the installation status of the receiving frame.

That is, when the receiving frame is installed in a place where the lid can be opened by turning or horizontal turning, the hinge hardware is connected to the lid main body so that it can be turned at least horizontally, and connected to the receiving frame. If a separate member such as a seat is interposed, the lid body can be inverted and horizontally turned, and the lid opening and closing operations can be performed according to the site. one
Where the lid cannot be opened by reversing or turning horizontally.
If a receiving frame is installed at the place, pull the lid body out of the receiving frame.
In addition to being able to open the lid, it is impossible to turn the hinge hardware horizontally.
So that the hinge hardware can rotate horizontally.
It is constrained, and the engaging claws of the hinge hardware always face the engaging protrusions of the receiving frame.
Since they are engaged, they have the same effect as a lock.
And the lid is opened when under pressure from inside the underground structure.
Inadvertent opening of the main body can be prevented (FIG. 7).
(B)). When opening the lid by horizontal turning
Is the lid, because the guide rib moves along the edge of the receiving frame.
Work is easy because the entire weight of the main body is left in the receiving frame
It is.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view showing a main part of a hinge structure.

FIG. 3 is a schematic perspective view of the lid main body as viewed from the bottom side thereof.

4A and 4B are details of a hinge mounting seat provided on the back surface of the lid body, wherein FIG. 4A is a bottom view thereof, and FIG. 4A is a partially cutaway view as viewed from a tapered surface side.

FIG. 5 is an exploded perspective view showing a hinge hardware and a hinge holder together with a connecting member.

FIG. 6 is a cutaway plan view showing a positional relationship between a hinge retainer and a spherical locking portion.

FIGS. 7A and 7B are cross-sectional views of a main part when a hinge hardware is connected to the lid body, wherein FIG. 7A is a state in which the lid is closed and FIG. Is shown.

FIGS. 8A and 8B are diagrams showing the opening operation of the lid body, wherein FIG. 8A shows a state in which the lid is closed, and FIG. 8B shows a state in which one end side of the lid body is placed on the upper edge of the receiving frame. Show.

9 (a) is a state in which the holding rib is pulled out while being applied to the upper edge of the receiving frame, and FIG. 9 (b) is a state in which the lid main body is moved to the road surface side. This shows a state in which it is raised.

FIG. 10 shows a state in which the lid body is separated from the receiving frame and the entire receiving frame is opened.

[Explanation of symbols]

 A: Lifting pressure B: Roadway C: Sidewalk D: Step 1: Receiving frame 1a: Tapered surface 1b: Engagement projection 2: Lid body 2a: Tapered surface 2c Rib 2d: Swing guide rib (guide rib) 2f: Guide rib 3: Locking device 5: hinge mounting seat 5b: mounting hole 5c: slit 5d: sliding surface 6: hinge hardware 6a: sphere head 6c: engaging claw 6e: notch 7: hinge holder 7c: pressure receiving surface 7d: pressure receiving surface 7e: projecting ridge 8a: bolt 8b: nut

Claims (2)

(57) [Claims] A hinge fitting is provided on a peripheral edge of a lid body fitted to a receiving frame, and a lower end of the hinge fitting is engaged with an engaging projection provided on an inner periphery of the receiving frame from below. With claws,
At the upper end of the hinge hardware, a spherical head is provided, and the spherical head is connected to a bag-shaped hinge mounting seat provided on the back surface of the lid body so as to be rotatable around its center, and the hinge mounting is performed. provided a hinge retainer for restraining the spheres head in a seating detachably wherein a hinge retainer and said spherical head, said hinge fittings is walking horizontal pivot non articulated relationship to the closure body at least horizontal pivot possible connecting either a selectable configuration and then underground construction for the lid comprising Te <br/> relationship. 2. A guide rib on a back surface of the lid body, the guide rib having a gradually decreasing amount from a lower surface of the lid body toward an edge on a side radially opposed to a side on which the hinge hardware is provided; 2. The underground structure lid according to claim 1, wherein the lid is slidably disposed along an upper edge of the receiving frame when the lid is opened.