JP3459208B2 - Lid for underground structures - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a lid for an underground structure.

The term "underground structure lid" as used in the present specification refers to a large iron lid, a manhole lid, etc. that openably and clogs an opening through an underground buried object in a sewer, an underground structural facility, etc. and the ground. Iron cover for rainwater infiltration basins, sewage basin lids, iron lids for joint gutters that can open and close to protect underground facility equipment and underground cables in power and communication, iron lids for power transmission, iron lids for power distribution, road surfaces in water supply and gas pipes The fire hydrant lid, water control valve lid, sluice valve lid, air valve lid, gas pipe lid, water meter lid, etc. that collectively function as an opening / closing lid that connects the lower buried conduit and its accessories to the ground.

[0003]

2. Description of the Related Art Conventionally, a receiving frame installed in an opening such as a manhole and a lid body supported by the receiving frame are repeatedly subjected to impact loads due to passage of a vehicle or the like, so that there is rattling between the lid body and the receiving frame. However, a cushioning member such as packing is interposed on the joint surface between the lid main body and the receiving frame.

As an example of such a case, for example, the actual fairness 7-
There is a lid device for an opening hole on the ground surface in an underground burial facility described in Japanese Patent No. 48758. This lid device includes a base body, a lid body that opens and closes an upper opening of the base body, an annular elastic packing that is interposed between the base body and the lid body, and an electrically insulating material that covers the inner surface of the lid body. And a ring-shaped groove is formed at a position facing the support surface of the base on the inner surface of the lid, and the ring-shaped elastic packing is held by this groove.

[0005]

However, in the above-mentioned lid device, when the impact load is repeatedly applied to the upper surface of the lid body due to the passage of a vehicle or the like, the elastic packing is also impacted. Since the elastic packing is formed on a part of the elastic packing, the elastic packing may partly come off when an unbalanced load is applied. There was a risk that it would come off from the groove part of the and the buffer effect would be impaired.

The present invention has been made in view of the above points, and it is difficult for the cushioning member to come off after the cushioning member is attached to the lid body.
An object of the present invention is to provide a lid for an underground structure that can maintain a buffering effect for a long period of time.

[0007]

In order to solve the above-mentioned problems, a lid for an underground structure of the present invention has a lid main body and a cushioning member attachable to the lid main body, and the outer peripheral side of the lid main body A plurality of recesses having a vertically long vertical cross-section are formed on the lower surface at intervals along the circumferential direction, and the cushioning member has a vertically long vertical cross-section and is mounted in the recess of the lid body. In the state, the lower surface portion of the cushioning member projects from the outer peripheral side lower surface portion of the lid body.

In the above structure, since the buffer member is formed to have a vertically long vertical cross section and is mounted in the recess having the vertically long vertical cross sectional shape, the vertical cross sectional shape of the buffer member itself is vertically long. In addition, the lateral deformation of the cushioning member is constrained by each side surface of the recess, whereby the amount of contraction of the cushioning member in the vertical direction can be increased, and an excellent cushioning effect is exhibited. Furthermore, the contact area between the cushioning member and the recess is increased, the mounting state is stabilized, and the cushioning effect can be maintained for a long period of time.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, it is desirable to provide a retaining means for preventing the cushioning member from coming off from the concave portion of the lid body when the cushioning member is mounted in the concave portion of the lid body. By providing the retaining means, it is possible to prevent the cushioning member mounted in the concave portion of the lid body from coming off from the concave portion. The buffering effect can be maintained over the entire range.

As the retaining means, a protrusion is provided on either the outer peripheral surface of the buffer member or the inner peripheral surface of the recess, and the other is provided on the outer peripheral surface of the buffer member or the inner peripheral surface of the recess. An engaging recess or an engaging through hole into which the protrusion can be fitted can be provided. Thus, when the cushioning member is mounted in the recess, the protrusion on either the outer peripheral surface of the cushioning member or the inner peripheral surface of the recessed portion is engaged with the protrusion on the other side of the outer peripheral surface of the cushioning member or the inner peripheral surface of the recessed portion. Since the movement is blocked by fitting into the stop recess or the locking through hole, it is possible to prevent the buffer member from coming off from the recess.

As the retaining means, the cushioning member is formed of an elastic material, and the cross-sectional shape thereof is linear, and the cross-sectional shape of the recess is a curved shape which can be mounted by bending the cushioning member. Good. As a result, when the cushioning member is mounted in the recess of the lid body, an elastic restoring force is generated in the cushioning member to return to the original linear shape, and a frictional force is generated by continuously pressing the side surface of the recess. Therefore, it is possible to prevent the buffer member from coming off from the recess. Further, since it is not necessary to form a specially shaped engaging portion in the buffer member or the concave portion, it is possible to contribute to simplification of the manufacturing process and reduction of defects.

As the retaining means, the buffer member is made of an elastic material, the vertical sectional shape of the buffer member is tapered, and the vertical sectional shape of the recess is tapered so that the buffer member can be mounted. It is also possible to use a taper shape. Thus, when the cushioning member is mounted in the recess of the lid body, the cushioning member is prevented from moving downward, so that the cushioning member can be prevented from coming off from the recess. Moreover, since the cushioning member and the recess are fitted together as a whole, an excellent retaining effect can be obtained.

As the retaining means, a protrusion may be provided on the upper surface of the buffer member, and a locking through hole into which the protrusion can be fitted may be provided on the upper surface of the recess. Thus, when the cushioning member is mounted in the recess of the lid body, the projection engages with the locking through hole and the cushioning member is held in a suspended state, so that the cushioning member can be removed from the recess. Can be prevented. Further, since the engagement state of the protrusion with respect to the locking through hole can be visually confirmed from the upper surface of the lid main body, it is possible to prevent defective mounting of the cushioning member.

As the retaining means, a through hole is provided on the upper surface or the side surface of the recess, and the engaging member is inserted into the through hole from the upper surface side or the outer peripheral side or the inner peripheral side of the lid main body to engage with the buffer member. A stop may be provided. This allows
When the cushioning member is mounted in the concave portion of the lid body, the cushioning member is fixed in the concave portion by the locking tool, so that the cushioning member can be prevented from coming off from the lid body. Further, since the cushioning member is attachable / detachable to / from the concave portion when the locking tool is not engaged with the cushioning member, replacement work or maintenance work of the cushioning member is easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. 1 is a front view showing a lid for an underground structure of the first embodiment, FIG. 2 is a rear view of the lid for an underground structure, FIG. 3 is a perspective view showing a cushioning member, and FIG. 4 is a lid for the underground structure. It is a longitudinal cross-sectional view showing a usage state of .

The underground structure lid of this embodiment is a lid body 10
2 is a so-called round lid having a circular planar shape.
As shown in FIG. 1, the outer peripheral side lower surface portion 10a of the lid main body 10 has a vertically elongated concave portion 1 at equal intervals along the circumferential direction.
1 is formed at four places, and a rubber cushioning member 12 is attached to each recess 11.

Further, as means for preventing the cushioning member 12 mounted in the recess 11 from coming off, projections 13 are formed on both side surfaces of the cushioning member 12.
In addition to the above, the recessed portion 14 is provided on the inner peripheral surface of the recessed portion 11 for engagement with the protrusion 13. When the cushioning member 12 is mounted in the recess 11, the protrusion 13 is fitted into the locking recess 14 so that the cushioning member 12 is held so as not to move, so that no adhesive or the like is required.

The cushioning member 12 has a width of 1 as shown in FIG.
6 is 10 mm, height 17 is 34 mm, length 18 is 82 m
m, and as shown in FIG. 4, the lower surface portion 12a of the cushioning member 12 when mounted in the recess 11 of the lid body 10.
Of the lid body 10 protrudes from the lower surface portion 10a on the outer peripheral side by about 2 mm. Therefore, when the lid body 10 is attached to the predetermined concrete box 15, the lower surface portion 1 of the cushioning member 12 is
The lid body 10 is supported by contacting the receiving surface 15a of the concrete pit 15 with 2a.

The cushioning member 12 is made of rubber having elasticity and has a vertically long vertical cross section. Since the cushioning member 12 is mounted in the recess 11 having a vertically long vertical cross section, the cushioning member 12 itself is cut vertically. In addition to the vertically long surface shape, the lateral deformation of the cushioning member 12 is constrained by each side surface of the concave portion 11, so that the amount of contraction of the cushioning member 12 in the vertical direction can be increased, and the excellent cushioning is achieved. Be effective.
Further, the contact area between the cushioning member 12 and the recess 11 is large,
The mounted state is stable, and the cushioning effect can be maintained for a long period of time.

The load applied to the upper surface of the lid main body 10 passes through the lower surface portions 12a of the four buffer members 12 and the concrete pit 1
5 is applied to the receiving surface 15a of the cushioning member 5, but the area of the lower surface portion 12a of the cushioning member 12 is set so that the compressive force thereof does not exceed the allowable compressive stress of the concrete pit 15. The concrete box 15 is not damaged or destroyed at the contact portion with 12a.

The cushioning member 12 mounted in the recess 11 is prevented from moving by the projection 13 being fitted into the locking recess 14, so that the upper surface of the lid body 10 is repeatedly subjected to impact loads when the vehicle passes. Even if added, the cushioning effect can be maintained for a long period of time without coming off from the recess 11.

Further, since the rubber cushioning member 12 has elasticity and the cross-sectional shape thereof is a linear shape, and the concave portion 11 has a circular cross-sectional shape, the cushioning member 12 is curved to form the concave portion 11. When it is mounted on the cushioning member 12, an elastic restoring force for returning to the original linear shape is generated in the cushioning member 12, and the outer peripheral side surface of the recess 11 is pressed to continuously generate a frictional force. The effect of preventing slipping out is produced. Further, even if the diameter of the lid body 10 is changed, the cushioning member 12 can be reused, and therefore the workability is also good.

The shapes of the cushioning member 12 and the recessed portion 11, the arrangement locations, the number of arrangements, the arrangement intervals, or the cushioning member 1
The material of No. 2, the amount of protrusion from the lower surface 10a of the lid body 10 and the like are not limited to those in the present embodiment.
It can be appropriately changed according to the size, the applied load, and the like.

In this embodiment, the locking recess 14 is the recess 1.
The protrusions 13 are provided on both side faces of the lid 1 so that the locking recesses 14 serve as locking through holes that penetrate from both side faces of the recess 11 to the outer peripheral side or the inner peripheral side of the lid body 10. Good. Further, in this case, when the elongated hole is formed along the circumferential direction, the dimensional error of the projection 13 in the circumferential direction can be absorbed.

Further, in the present embodiment, the lid main body 10 is placed on the receiving surface 15a of the concrete pit 15 via the cushioning member 12, but the lid main body is placed in the opening of the manhole or the like. In the case of mounting on, the buffer member according to the present invention may be interposed between the lid body and the receiving frame.

Next, a second embodiment of the present invention will be described with reference to FIG. The lid for an underground structure of the present embodiment is a so-called rectangular lid in which the lid body 20 has a quadrangular planar shape, and has a longitudinal sectional shape along the circumferential direction at each corner portion of the outer peripheral side lower surface portion 20a. Is a vertically long recess 21
A total of eight places are formed, and a rubber cushioning member 22 having a vertically long vertical cross-section is mounted in each recess 21.

Similar to the first embodiment, projections (not shown) are provided on both side surfaces of the cushioning member 22 as means for preventing the cushioning member 22 mounted in the recess 21 from coming off, and the projections are fitted on both side surfaces of the recessed portion 21. A possible locking recess (not shown) is provided. When the cushioning member 22 is mounted in the recess 21, the protrusion fits into the locking recess and the cushioning member 22 is held so that it does not move, so that no adhesive or the like is required. Even if a shock load is repeatedly applied to the upper surface of the lid body 20 due to passage of a vehicle or the like, the cushioning member 22 does not come off from the concave portion 21,
The buffering effect can be maintained for a long period of time. Other functions and effects are similar to those of the lid of the first embodiment.

Next, another embodiment of the buffer member retaining means will be described with reference to FIGS.

In the retaining means shown in FIG. 6, a concave portion 31 is formed on the outer peripheral side lower surface portion 30a of the lid main body 30 along the circumferential direction so as to have a vertically long vertical sectional shape and a tapered taper shape. A rubber cushioning member 32 having a vertically long vertical cross section and a tapered shape is attached. When the cushioning member 32 is mounted in the recess 31 of the lid body 30, the cushioning member 32 is prevented from moving downward, so that the cushioning member 3
2 can be prevented from coming off from the lid body 30.
In the case of this embodiment, since the cushioning member 32 and the recess 31 are fitted together as a whole, a particularly excellent retaining effect can be obtained. The structure and functions of other parts are the same as those of the lid of the first embodiment.

In the retaining means shown in FIG. 7, a recess 41 having a vertically long longitudinal cross section is provided along the circumferential direction on the outer peripheral side lower surface portion 40a of the lid main body 40, and an engaging through hole 42 is provided on the upper surface thereof. Is provided. Further, a projection 44 that can be fitted into the locking through hole 42 is provided on the upper surface of the buffer member 43 that can be mounted in the recess 41 and has a vertically long vertical cross-sectional shape. When the cushioning member 43 is mounted in the recess 41 of the lid body 40, the projection 44 engages with the locking through hole 42 and the cushioning member 43 is held in a suspended state, so that the cushioning member 43 comes off from the recess 41. Can be prevented. In the case of this embodiment,
Since the engagement state of the protrusion 44 with respect to the locking through hole 42 can be visually confirmed from the upper surface of the lid body 40, it is possible to prevent mounting failure of the cushioning member 43 and the like. The structure and functions of other parts are the same as those of the lid of the first embodiment.

In the retaining means shown in FIG. 8, a recess 51 having a vertically long vertical cross section is provided along the circumferential direction on the outer peripheral side lower surface 50a of the lid main body 50, and a through hole 52 is formed on the upper surface of the recess 51. The through hole 5 is provided from the upper surface of the lid main body 50.
A locking screw 54 is provided which is inserted into the second member 2 and engages with the buffer member 53. The cushioning member 53 is attached to the recessed portion 51 of the lid body 50, and the locking screw 54 is inserted into the through hole 52 so that the cushioning member 5
The buffer member 53 is fixed in the recess 51 by being screwed into the screw hole 55 on the upper surface of the cover 3, and can be prevented from coming off from the lid main body 50. In the case of this embodiment, the locking screw 54
Since the cushioning member 53 is attachable / detachable to / from the recess 51 when the cushioning member 53 is not engaged with the cushioning member 53, replacement work or maintenance work of the cushioning member 53 is easy. The structure and functions of other parts are the same as those of the lid of the first embodiment.

Further, in this embodiment, the through hole 52 is provided on the upper surface of the recess 51, but the through hole 52 may be provided on the outer peripheral side surface or the inner peripheral side surface of the recess 51. In this case, the locking screw 54 is inserted from the outer peripheral side or the inner peripheral side of the lid main body 50.

[0033]

According to the lid for an underground structure of the present invention, the buffer member is formed to have a vertically long vertical cross section, and the buffer member is mounted in a recess having a vertically long vertical cross section.
In addition to the longitudinal cross-sectional shape of the cushioning member itself being long, the lateral deformation of the cushioning member is constrained by each side surface of the recess, thereby increasing the amount of shrinkage of the cushioning member in the vertical direction. The cushioning effect can be improved.
Furthermore, the contact area between the cushioning member and the recess is increased, the mounting state is stabilized, and the cushioning effect can be maintained for a long period of time.

In the present invention, when the buffer member is mounted in the recess of the lid main body, the buffer member mounted in the recess of the lid main body is provided by providing a retaining means for preventing the buffer member from coming off from the recess of the lid main body. Since it is possible to prevent the member from coming out of the concave portion, it is possible to maintain the cushioning effect for a long period of time even if a shock load is repeatedly applied to the upper surface of the lid body due to passage of a vehicle or the like.

As the retaining means, a protrusion is provided on either the outer peripheral surface of the cushioning member or the inner peripheral surface of the recess, and the protrusion can be fitted on the other outer peripheral surface of the cushioning member or the inner peripheral surface of the recess. By providing such a locking recess or through hole for locking, when the cushioning member is mounted on the lid body, one of the protrusions on the outer peripheral surface of the cushioning member or the inner peripheral surface of the recessed portion is Alternatively, the cushioning member can be prevented from coming off from the lid body because the movement is blocked by fitting into the other one of the inner peripheral surface of the recess and the engaging recess or the engaging through hole.

As the retaining means, the cushioning member is formed of an elastic material, and the cross-sectional shape thereof is linear, and the cross-sectional shape of the recess is curved so that the cushioning member can be curved and mounted. Thus, when the cushioning member is mounted in the concave portion of the lid main body, an elastic restoring force that tries to return to the original linear shape is generated in the cushioning member, and the side surface of the concave portion is pressed to continuously generate the frictional force. It is possible to prevent the member from coming off the lid body. Further, since it is not necessary to form a specially shaped engaging portion in the buffer member or the concave portion, it is possible to contribute to simplification of the manufacturing process and reduction of defects.

As the retaining means, the cushioning member is formed of an elastic material, the cushioning member has a vertically tapered shape in vertical cross section, and the recess has a vertically tapered shape in which the cushioning member can be mounted. By doing so, when the cushioning member is mounted in the recess of the lid body, the cushioning member is prevented from moving downward, so that the cushioning member can be prevented from coming off from the recess. Moreover, since the cushioning member and the recess are fitted together as a whole, an excellent retaining effect can be obtained.

As the retaining means, a projection is provided on the upper surface of the cushioning member, and a locking through hole into which the projection can be fitted is provided on the upper surface of the recess, so that when the cushioning member is mounted in the recess of the lid body, the projection is formed. Since the buffer member is held in the suspended state by engaging with the locking through hole, it is possible to prevent the buffer member from coming off from the recess. Further, since the engagement state of the protrusion with respect to the locking through hole can be visually confirmed from the upper surface of the lid main body, it is possible to prevent defective mounting of the cushioning member.

[0039] As the retaining means, the transmural hole provided on the upper surface or side of the recess, the locking tool for engaging the insert and the cushioning member to the through hole from the top side or outer circumferential side or the inner circumferential side of the lid body By providing the cushioning member, when the cushioning member is mounted in the recessed portion of the lid body, the cushioning member is fixed in the recessed portion by the locking tool, so that the cushioning member can be prevented from coming off from the lid body. Further, since the cushioning member is attachable / detachable to / from the concave portion when the locking tool is not engaged with the cushioning member, replacement work or maintenance work of the cushioning member is easy.

[Brief description of drawings]

FIG. 1 is a front view showing a lid for an underground structure of a first embodiment.

2 is a back view of the underground structure lid shown in FIG. 1. FIG.

FIG. 3 is a perspective view showing a cushioning member.

FIG. 4 is a vertical cross-sectional view showing a usage state of the lid for the underground structure shown in FIG. 1.

FIG. 5 is a back view showing a lid for an underground structure of a second embodiment.

FIG. 6 is an explanatory view showing another embodiment relating to the retaining member for the cushioning member.

FIG. 7 is an explanatory view showing another embodiment relating to the retaining member for the cushioning member.

FIG. 8 is an explanatory view showing another embodiment of the retaining member for the cushioning member.

[Explanation of symbols]

10, 20, 30, 40, 50 Underground structure lids 10a, 20a, 30a, 40a, 50a Outer peripheral side lower surface parts 11, 21, 31, 41, 51 Recess 12, 22, 32, 43, 53 Buffer member 12a Buffer Lower surface parts 13 and 44 of the members 14 Protrusions 14 Recesses for locking 15 Concrete cells 15a Receptive surface of concrete cells 16 Width of buffer members 17 Height of buffer members 18 Length of buffer members 42 Through holes for locking 52 Through holes 54 Set screw 55 screw hole

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References: Actually open 54-135044 (JP, U) Actually open 63-61450 (JP, U) Actual Kohei 7-48758 (JP, Y2) (58) Field (Int.Cl. ⁷ , DB name) E02D 29/14

Claims (8)

(57) [Claims] 1. A lid main body and a cushioning member attachable to the lid main body, wherein concave portions having a vertically long vertical cross-section are formed on the lower surface of the outer peripheral side of the lid main body at intervals along the circumferential direction. A plurality of the buffer members are formed, and the buffer member has a vertically long vertical cross-sectional shape,
A lid for an underground structure, wherein a lower surface portion of the cushioning member projects from an outer peripheral side lower surface portion of the lid body in a state where the cushioning member is mounted in the recess of the lid body. 2. The lid for an underground structure according to claim 1, further comprising retaining means for preventing the cushioning member from coming off from the concave portion of the lid body when the cushioning member is attached to the concave portion of the lid body. . 3. As the retaining means, a protrusion is provided on either the outer peripheral surface of the buffer member or the inner peripheral surface of the recess, and either the outer peripheral surface of the buffer member or the inner peripheral surface of the recess. The lid for the underground structure according to claim 2, further comprising a locking recess or a locking through hole into which the protrusion can be fitted. 4. As the retaining means, the cushioning member is formed of an elastic material, and the cross-sectional shape thereof is linear, and the cross-sectional shape of the recess is a curved shape that can be mounted by bending the cushioning member. The lid for an underground structure according to claim 2, which has a shape. 5. As the retaining means, the cushioning member is formed of an elastic material, the cushioning member has a vertical cross-sectional shape that tapers downward, and the cushioning member can be mounted in the vertical cross-sectional shape of the recess. The lid for an underground structure according to claim 2, wherein the lid has a tapered shape. 6. The underground structure lid according to claim 2, wherein a protrusion is provided on an upper surface of the cushioning member, and a locking through hole into which the protrusion can be fitted is provided on an upper surface of the recess as the retaining means. . 7. As said retaining means, a through hole is provided on the upper surface or side surface of said recess, and is inserted into said through hole from the upper surface side or outer peripheral side or inner peripheral side of said lid body to engage with said buffer member. The lid for an underground structure according to claim 2, further comprising a locking tool. 8. The underground structure lid according to claim 1, wherein the lid body is placed on a receiving frame.