JP2649314B2 - 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 hinge structure for a cover for an underground structure such as a manhole, and more particularly to a hinge structure for a cover for an underground structure in which a mounting portion of a hinge is formed compact. The “cover for underground structure” referred to in the present specification is
For large-scale iron lids, manhole lids, sewage lids, and open / closed joints that protect underground facilities equipment and wiring in electric power and communications that block openings between underground buried structures, underground structural facilities, etc. and the ground. Iron lid, iron lid for power transmission, iron lid for power distribution, fire hydrant lid, water control valve lid, partition valve lid that functions as an open / close door that connects underground roads in water and gas piping and underground roads and their accessories to the ground , Air valve cover, gas pipe cover, water meter cover, etc.

[0002]

2. Description of the Related Art Hitherto, various lids for underground structures such as manhole lids in which a receiving frame and a lid body for closing an opening of the receiving frame are openably and closably connected by hinges have been proposed. Above all, as an example in which the base end portion of the hinge is pivotally attached to the inner peripheral surface of the receiving frame, for example, as a first example, the arm is pivotally attached to a bracket projecting from the inner peripheral side of the receiving frame, It is known that the other end of the arm is slidably and rotatably engaged in an engagement groove provided on the back surface of the lid body, so that the lid body can be opened and closed by either horizontal turning or vertical inversion. (See JP-A-59-102020). Also, the second
As an example, the base end of an arm-shaped hinge is pivotally moved vertically and rotatably in a groove of a support piece protruding on one side of the inner periphery of the receiving frame, and the distal end of the hinge is cut out on the back surface of the lid body. There is known a device which is slidably fitted in an elongated hole provided in a recess formed (Japanese Utility Model Application Laid-Open No. 64-57142). According to the hinge structure of the lid for the underground structure, the amount of protrusion of the bracket, support piece, etc., to which the base end of the hinge, such as an arm or hinge, is pivotally attached, is small toward the center of the receiving frame. The effective inner diameter is wide, and it is easy to carry in the equipment and to raise and lower by an operator.

[0003]

However, in these conventional hinge structures for lids for underground structures, the base end of the hinge is not provided.
For the support portion from the balance of the height and the like of the peripheral surface portion to slide the tip of the butterfly <br/> number instrument pivot position and the lid body had to long in the direction of the center of the lid body, the lid body Depending on the diameter of the cover, the reinforcing rib formed on the back surface of the lid body cannot be formed at a required location, or the reinforcing rib and the support portion are too close to be able to easily attach and detach the hinge and the lid body. is there. In recent years, in many cases, an interlocking block or the like is embedded on the surface of the lid body in accordance with the pavement of the sidewalk part from the view of the city, but the support formed on the back surface of the lid body has been increased. If the portion is long in the center direction of the lid main body, the block cannot be embedded on the surface side of the support portion, and the metal portion of the lid main body is widely exposed, causing a problem that the appearance is impaired. .
Therefore, according to the present invention, not only can the opening of the receiving frame be formed wide in the open state, but also the supporting portion of the hinge formed on the back surface of the lid body can be formed into a compact underground structure lid. It is intended to provide a hinge structure.

[0004]

In order to solve the above-mentioned problems, a hinge structure of a lid for an underground structure according to the present invention includes a lid body, and a receiving frame whose opening is opened and closed by the lid body. A hinge structure for an underground structure lid comprising a hinge for connecting the lid body and a receiving frame, wherein the hinge is formed of a first hinge member and a second hinge member; The first hinge member has a connection portion with the second hinge member opened at a side surface thereof, and a receiving frame pivotal support portion pivotally supported by a concave seat formed on the inner periphery of the receiving frame is formed at an end thereof. , Second hinge member
The support is adapted to form the sliding engagement portion connecting portion slidably engaged with is opened on the side surface of the first hinge member at one end thereof, the other end formed in the back side rim of the cover body A lid pivoting portion pivotally supported by the portion, and the supporting portion is closed in a closed state.
Width of formed as a slightly larger inner diameter than the diameter of Futakururu branch. The first hinge member is formed in a substantially L-shape including a neck portion and an arm portion, a receiving frame pivotal support portion is formed at an end of the neck portion, and a connecting portion is formed as an elongated hole on a side surface of the arm portion. <br/> may be. The concave seat formed on the inner periphery of the receiving frame is the first seat.
The storage part and the second storage part are formed to communicate vertically, and
In the second storage portion located at the position, a receiving frame pivotal support portion of the first hinge member is provided.
It is stored and pivoted, and the first storage part located on the lower side
The neck can be abutted against the wall. In addition,
The part is perpendicular to the plane formed by the arm and neck.
Then, the outer peripheral side surface of the cylindrical member was cut parallel to the axial direction of the cylinder.
The flat portion is provided facing upward, and the receiving portion is
Adjust the height of the introduction recess when inserting the frame pivot
May be slightly larger than the height of the flat part of the part
No. In addition, the sliding engagement part has an oval cross section that is long in the sliding direction.
It may be formed.

[0005]

According to the hinge structure of the underground structure lid of the present invention having the above-mentioned structure, a sliding engagement portion formed at one end of the second hinge member is connected to a connecting portion opened on the side surface of the first hinge member. By slidably engaging and supporting the receiving frame formed on the inner periphery of the receiving frame and the receiving frame pivoting portion of the first hinge member, there are few portions that protrude into the opening of the receiving frame in the open state. That is, the opening can be formed wider. And the first
When the hinge member is substantially L-shaped consisting of an arm and a neck , the arm rises vertically when the lid is open , so that the height of the arm is high.
Only the protruding part can be stopped to protrude into the opening of the receiving frame.
Thus, the opening can be formed even wider . In addition, the horizontal width of the lid body is just
By pivotally supporting the support portion having an inner diameter slightly larger than the diameter and the lid pivot portion formed at the other end of the second hinge member, it is possible to prevent interference between the reinforcing rib on the back surface of the lid main body and the support portion . In addition, the height of the support frame
Since the height of the introduction recess of the seat is slightly increased, the first
The hinge member can be easily attached to the receiving frame, and
At the time of cropping, it is prevented from leaving the receiving frame. Also, the first butterfly
When the number member is supported horizontally to prevent the lid from dropping
In both cases, only the second hinge member slides with respect to the first hinge member
Enables smooth opening and closing operations
Can be

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire structure of a cover 1 for an underground structure according to an embodiment of the present invention, and FIG. As shown in FIG. 1, the lid 1 for an underground structure includes a substantially annular receiving frame 2 provided on a ground portion of a vertical hole communicating with an underground structure such as a sewer, and a substantially circular opening of the receiving frame 2. Can be opened and closed
And a lid main body 3 that closes .

A receiving seat 2A for pivotally supporting a part of a hinge 6 to be described later is formed on one inner side of the receiving frame 2. Further, a burl insertion hole 15 for inserting a burl or the like and pulling up and opening the lid body 3 is provided on a surface of the lid body 3 substantially opposite to the first storage recess. Further, as shown in FIG. 2, the first storage recess 4 of the receiving frame 2 is provided.
A support portion 5 for connecting the hinge 6 and the lid main body 3 is provided at a position of the lid main body 3 corresponding to.

Next, in the lid for the underground structure of this embodiment,
FIG. 3 shows the entire configuration of the hinge 6 and a portion connected thereto . As shown in FIG. 3, the hinge member 6 includes a first hinge member 6A.
And a second hinge member 6B. The second hinge member 6 </ b> B includes a basic member 8, a holding member 9, and a fastening nut 10.

The first hinge member 6A is formed in a substantially L-shape, in which the arm 7A forming the lower horizontal side is formed longer than the neck 7N forming the vertical side, and the side thereof has a longitudinal direction. A long slide hole 7H as a connecting portion extends over the extension d. A first hinge portion 7P as a receiving frame pivot portion is provided at the uppermost end of the neck portion 7N in a direction orthogonal to a plane formed by the arm portion 7A and the neck portion 7N. The first hinge portion 7P is an outer peripheral side of the cylindrical member was chopped to dampen parallel to the axial direction of the cylinder, without the so-called "semi-cylindrical" and toward the flat portion upwards. The height of this semicylindrical first hinge portion 7P is h1 as shown in the figure.

Of the components constituting the second hinge member 6B,
Primary member 8 is formed in a substantially L-shape, intends that
The horizontal portion 8D forming the lower horizontal side is formed so as to be shorter than the vertical portion 8E forming the vertical side, and a slider portion 8S having a length e1 is protruded from a substantially central portion of the horizontal portion 8D. . The slider portion 8S is provided with the above-described sliding slot 7H.
The sliding long hole 7H is configured to be slidable in the longitudinal direction of the opening. Further, a bolt portion 8B formed by cutting a male screw protrudes from an end of the slider portion 8S on the outer peripheral surface thereof.

The holding member 9 has substantially the same shape as the basic member 8.
A slider receiving recess 9S is formed at a position corresponding to the position of the slider portion 8S at a substantially central portion of a horizontal portion 9D forming a lower horizontal side of the L-shaped portion,
Further, a bolt through hole 9B is formed so that the bolt portion 8B of the basic member 8 can be inserted. Therefore, when the bolt portion 8B is inserted into the bolt through hole 9B and tightened by the tightening nut 10 having an internal thread cut into the inner peripheral surface, the tip end of the slider portion 8S becomes the slider receiving concave portion 9S having the depth e2 of the pressing member 9. To form the sliding engagement portion 8C, and the slider portion 8S does not come off the sliding long hole 7H.

On the other hand, at the uppermost end of the vertical portion 8E of the basic member 8, a second hinge portion 8P as a lid pivot supporting portion having a columnar length f1 is provided so as to protrude therefrom. A certain vertical portion 9E has a disc-shaped hinge receiving recess 9 having an inner diameter slightly larger than the outer diameter of the second hinge portion 8P and a depth f2.
P is provided.

A support portion 5 is provided at a position on the back edge of the lid body corresponding to the position of the hinge 6. 4 to 7 show a more detailed configuration of the support portion 5. FIG. As shown in the figure, the support portion 5 is provided with two hinge mounting concave portions 12.
A, 12B, and a hinge mounting rib 12R for separating the two recesses, and approximately at the center of the hinge mounting rib 12R, an upper and lower portion for inserting the second hinge portion 8P is provided. A hinge insertion hole 12H which is a long hole in the direction is provided.

[0014] For receiving frame 2, as shown in FIG. 3, the position of the inner periphery of the receiving frame corresponding to the position of the hinge member 6, seat
2A is formed, and the receiving seat 2A is provided with a first storage recess 4 and a second storage recess 14 as illustrated. FIGS. 8 to 10 show the configuration when the first hinge member 6A and the second hinge member 6B are housed in the first housing recess 4 and the second housing recess 14 in a state of being combined with each other. . 8 is a view as viewed in the direction of the arrow D in FIG. 3, and FIG. 9 is a view as viewed in the direction of the arrow E in FIG. As shown in the figure,
In the first storage recess 4, the corner portion 7 </ b> R that forms a substantially right angle of the first hinge member 6 </ b> A or the slider portion 8 </ b> S
If located in R closer the slider section 8S is the (closed lid state), the horizontal portion 8D of the base member 8 and the pressing member 9, 9D
Is stored. At this time, the first hinge member 6A
Is in contact with the inner wall of the first storage recess 4, so that the arm 7A is kept horizontal.

The second storage recess 14 first has a height h2.
Of the receiving frame 2 is slightly inclined downward toward the center of the receiving frame 2 and falls in a direction toward the inside thereof (a direction toward the outer periphery of the receiving frame 2: a direction D in FIG. 3).
The height h2 of the introduction concave portion is equal to the height h1 of the first hinge portion.
It is set to be only slightly larger than. The cross-sectional shape of the recessed portion is a substantially semi-cylindrical concave curved surface whose longitudinal direction is a direction tangent to the circumference of the receiving frame 2, and forms a receiving body 14 </ b> S that supports the first hinge portion 7 </ b> P. As shown in FIGS. 10 to 13, the radius of curvature is formed slightly larger than the radius of curvature of the lower surface of the first hinge portion. In addition, a communication recess 14H extending in the vertical direction in FIG. 3 is provided in communication with the second storage recess 14 so that the neck portion 7N of the first hinge member 6A can be stored with a margin. The first storage recess 4 and the second storage recess 14 communicate with each other.

A method of connecting the lid main body 3 to the receiving frame 2 by the hinge 6 having the above-described configuration will be described below with reference to FIGS. First, the first hinge member 6A is moved in the direction D in FIG. 3 from the state shown in FIG. 3, and the first hinge member 4A and the introduction recess 14F of the second storage recess 14 and the communication recess 14H are moved. Insert into the approximately gourd-shaped recess formed. After the insertion, the first hinge part 7P is lowered until the semicylindrical curved surface portion of the first hinge portion 7P is placed on the semicircular concave curved surface of the seat main body 14S.

Next, the slider portion 8S of the basic member 8 is moved to the first position.
The hinge member 6A is inserted into the slide elongated hole 7H, and the second hinge portion 8P of the basic member 8 is placed on the ground surface at the edge of the receiving frame 2.
It is inserted through the hinge mounting recess 12B of the support portion 5 of the lid body 3 placed in the inverted state into the hinge insertion hole 12H having a long hole-like allowance. In this state, the slider 8S protruding from the sliding long hole 7H of the first hinged member 6A and the distal end of the bolt 8B protruding from the distal end of the slider 8S are inserted into the slider of the holding member 9. The distal end portion of the second hinge portion 8P that abuts on the receiving recess 9S and the bolt through hole 9B so that their axes are aligned with each other, and at the same time, projects from the hinge mounting recess 12A of the support portion 5 that has been inserted. Then, the pressing member 9 is brought into contact with the hinge receiving concave portion 9P such that the axes of the both coincide with each other. Thereafter, the bolt portion 8 protruding from the bolt through hole 9B is formed.
B. Tighten the tightening nut 10 sufficiently to the tip portion.

In this nut tightened state, the effective length of the slider portion 8S (the slider portion 8S before insertion in FIG. 3).
The length obtained by subtracting the depth e2 of the slider receiving recess 9S from the length e1 of the slider receiving recess 9S, and the effective length of the second hinge portion 8P (the length f1 of the second hinge portion 8P before insertion in FIG. 9P is less than the depth f2)
The hinge member 6A is configured to be longer than the width b of the L-shaped piece. Therefore, even if the tightening nut 10 is firmly tightened, the slider portion 8S can slide smoothly in the sliding long hole 7H, and the lid body 3 also rotates smoothly around the second hinge portion 8P. However, the second hinge member 6B is configured to only slide with respect to the first hinge member 6A and not rotate.

Next, the hinge 6 having the above configuration and the receiving frame 2
The operation of opening and closing the lid body 3 of the underground structure lid 1 according to the present embodiment by the cooperative operation of the lid body 3 will be described below with reference to FIGS. 9 to 13.

First, FIG. 10 shows a state in which the lid body 3 of the underground structure lid 1 is completely closed, and FIG. 11 shows a state in which the lid body 3 and the receiving frame 2 are fitted together with an opening / closing tool or the like. Rear lid body 3
Are shown to be inverted. In this state, the arm portion 7A of the first hinge member 6A is horizontally supported, so that the weight of the lid body 3 is supported and the slider portion 8A is supported.
S is drawn out to near the approximate center of the slide slot 7H.

In this case, the introduction recess 14F is slightly
It is inclined downward toward the center, and the height h2 of the introduction recess is 1st.
Because it is only slightly larger than the hinge height h1,
In order to pull out the first hinge portion 7P from the second storage recess 14, the first hinge member 6A must be moved upward in the drawing and further rotated slightly. However, FIG.
As shown in FIG. 5, when the lid body 3 is to be opened, the weight of the lid body 3 acts downward on the first hinge member 6A and the second hinge member 6B.
The first hinge portion 7P is pivotally supported by the seat main body 14S and does not come off the second storage recess 14.

Next, FIG. 12 shows a state where the lid body 3 is opened to a substantially vertical upper position. As shown in the drawing, in this state, the outer peripheral edge of the lid main body 3 comes into contact with the two contact points X on the inner peripheral edge of the receiving frame 2, so that the lid main body 3 is inverted about the contact X substantially. Therefore, the support portion 5 of the lid body 3
Since the side is lifted upward, the slider portion 8S slides to the tip in the slide elongated hole 7H, and the first hinge member 6A tries to rotate about the first hinge portion 7P.

Next, FIG. 13 shows a state in which the lid body 3 is completely opened, and is placed on the ground surface with its back surface facing upward. As shown in the drawing, in this state, while the slider portion 8S remains slid to almost the vicinity of the distal end portion in the sliding long hole 7H, the lid main body 3 is completely inverted around the first hinge portion 7P. The receiving frame 2 is opened. In addition, even when the cover main body 3 is violently dropped on the ground surface, since the diameter of the first hinge portion 7P is larger than that of the introduction concave portion 14F, the first hinge portion 7P does not fall out of the second storage concave portion 14. It is supported by the seat body 14S.

As described above, in the hinge structure of the lid for an underground structure according to the present embodiment, the receiving seat is formed by the first storage recess and the second storage recess.
Together consist housing recess, the was substantially L-shape 1
Since one end of the second hinge member is slidably engaged with the connecting portion opened on the side surface of the hinge member, the opening in the receiving frame in the open state can be formed wider than before, and the hinge can be formed. The support portion of the lid body that supports the tool can be formed compact.

The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and has substantially the same configuration as the technical idea described in the claims of the present invention, and any device having the same function and effect can be realized by the present invention. It is included in the technical scope of the invention. For example, in the above embodiment, the basic member 8 and the holding member 9
When combined with each other, the second hinge member 6B has a substantially L-shape as shown in FIG. 3, which has a substantially straight shape, an arc shape, a bent shape in the middle, and the like. It doesn't matter. Further, although the lid pivot portion serving as the second hinge portion is pivotally supported by the support portion, it may be held by a spherical lid pivot portion.

[0026]

As described above, in the hinge structure of the lid for an underground structure according to the present invention, the sliding portion formed at one end of the second hinge member at the connecting portion opened on the side surface of the first hinge member. causes Dogakarigo portion slidably engaged to, by pivotally supported a receiving frame pivot portion of the seat and the first hinge member formed in a concave shape on the peripheral inside receiving frame, the opening of the receiving frame in open lid state The number of protruding portions is reduced, and the opening can be formed wider. Moreover, when the first hinge member and the arm portion and the neck Metropolitan substantially L-shape made of, since the arms with open lid state erected vertically shaped by a height portion of the arm portion receiving frame opening Stop to protrude
The opening can be formed even wider . In addition, the width of the lid is
A support having an inner diameter slightly larger than the diameter of the pivot, and a second
By pivoting the lid pivot at the other end of the hinge member, it is possible to prevent interference between the reinforcement ribs provided at the required locations on the back of the lid main body and the support, and to easily attach and detach the support and the hinge. Can be performed. Further, when the interlocking block or the like is embedded in the surface of the lid main body, the metal portion exposed on the surface of the lid main body can be made much narrower than in the past because the support portion is compact.
Therefore, even if it is installed on a sidewalk or the like, it can be harmonized with the scenery of the city without discomfort. In addition, the inner wall of the first storage section
1 Make the first hinge member horizontal by contacting the neck of the hinge member.
Supports the weight of the lid body and supports the lid when opening.
Prevents the main unit from falling into the receiving frame, and opens and closes the lid
The operation is smooth. Furthermore, the first
The hinge member can be easily inserted into the receiving frame of the receiving frame.
At the time of operating the lid, it is possible to prevent detachment from the seat. Also,
The rotation of the second hinge member is restricted with respect to the first hinge member.
The first hinge member and the second hinge member only slide.
Since the member looks like a single hinge,
The lid closing operation can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing an entire configuration of a cover for an underground structure according to an embodiment of the present invention.

FIG. 2 is a bottom view of the lid main body shown in FIG.

FIG. 3 is a perspective view showing an entire structure of a hinge and a portion connected to the hinge in a lid for an underground structure according to an embodiment of the present invention.

FIG. 4 is a view on arrow A of a lid-side mounting portion in FIG. 3;

FIG. 5 is a view of the lid-side mounting portion in FIG.

FIG. 6 is a view of the lid-side mounting portion in FIG.

FIG. 7 is a view of the lid-side mounting portion in FIG.

FIG. 8 is a view taken in the direction of an arrow D, showing a state in which first and second hinge pieces are attached to the arm-shaped pieces in FIG. 3 and fitted to the receiving seat.

9 is a view on arrow E showing a state when the first hinge portion of the arm-shaped piece in FIG. 3 is fitted to the seat.

FIG. 10 is a view showing a state in which the lid body is completely closed.

FIG. 11 is a view showing a state where the lid body is slightly lifted upward and opened.

FIG. 12 is a view showing a state where the lid body is opened to a substantially vertically upper position.

FIG. 13 is a view showing a state where the lid body is completely opened and the lid body is placed with its back surface facing upward.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover for underground structure 2 Receiving frame 2A Receiving seat 3 Lid main body 4 First storage recess 5 Supporting part 6 Hinge tool 6A First hinge member 6B Second hinge member 7A Arm part 7H Slot for sliding (fixed engagement part) 7N Neck 7P First hinge part (supporting frame pivot support part) 7R Corner part 8 Basic member 8A Body part 8B Bolt part 8C Sliding engagement part 8D Horizontal part 8E Vertical part 8P Second hinge part (lid pivot support part) 8S Slider part 9 Holding member 9A Main body 9B Bolt through hole 9D Horizontal part 9E Vertical part 9P Hinge receiving concave part 9S Slider receiving concave part 10 Tightening nut 12A, 12B Hinge mounting concave part 12H Hinge insertion hole 12R Hinge mounting rib 14 Second storage concave part 14F Introduction Concave part 14H Communication concave part 14S Receiving body 15 Bar insertion hole b L-shaped piece width d Length of inside of long hole for slide e1 Length of slider part e2 Slider Receiving recess depth f1 Second hinge portion length f2 Hinge receiving recess depth h1 First hinge portion height h2 Introducing recess height L Hinge protrusion length t Slider length

Claims (5)

(57) [Claims] 1. A hinge structure for an underground structure lid comprising a lid body, a receiving frame whose opening is closed by the lid body so as to be openable and closable, and a hinge connecting the lid body and the receiving frame. The hinge device is formed of a first hinge member and a second hinge member, and the first hinge member has a connection portion with the second hinge member.
With opening on its side surface, forming a receiving frame pivot portion to be pivotally supported on a concave seat formed on the inner periphery of the receiving frame at its end, the second hinge member, and is opened to the side surface of the first hinge member the sliding engagement portion engaged to be coupled portion sliding so as to form at one end thereof, the other end forms a Futakururu branch which is pivotally supported to a support portion formed in the back side rim of the lid body, the Support is closed
The width of the lid is slightly larger than the diameter of the lid pivot
Hinged structure of the lid for underground structures characterized by having an inside diameter . 2. The first hinge member is formed in a substantially L-shape including a neck portion and an arm portion, a receiving frame pivoting portion is formed at an end of the neck portion, and a connecting portion is a long hole in a side surface of the arm portion. The hinge structure for a lid for an underground structure according to claim 1, wherein the hinge structure is formed in an opening shape. 3. A concave seat formed on the inner periphery of the receiving frame is provided with a first seat.
The storage part and the second storage part are formed to communicate vertically, and
In the second storage portion located at the position, a receiving frame pivotal support portion of the first hinge member is provided.
It is stored and pivoted, and the first storage part located on the lower side
2. The method according to claim 1, wherein the neck is abutted against the wall.
A hinge structure for a lid for an underground structure according to claim 2. 4. The receiving frame pivot portion is formed by a plane defined by an arm portion and a neck portion.
And the outer peripheral side of the cylindrical member
The plane part cut in parallel to the axial direction of
Introducing recess for inserting the receiving frame pivot into the second storage portion of the receiving seat
Part height is higher than the height to the flat part of the receiving frame pivot part.
4. The device according to claim 1, wherein the size is slightly increased.
Hinge structure of the lid for the underground structure described above. 5. A sliding engagement part having an elliptical cross section elongated in a sliding direction.
5. The method according to claim 1, wherein the second member is formed in a shape.
Hinge structure of lid for underground structure.