JPH0965U - Underground structure lid - Google Patents

Abstract

(57) [Problem] To provide a cover for an underground structure through which a blade of a snowplow can easily pass and which does not cause an obstacle even when installed in a snow-covered area. SOLUTION: A smooth curved buffer portion 15 inclined downward and outward at an upper edge of an inner cylindrical body 3 corresponding to a receiving frame, and a narrow inclined surface 20 at an upper end of a supporting portion 18 of the receiving frame. Forming
Further, the lid main body 17 is supported such that its upper surface is lower than the upper surface of the receiving frame.

Description

[Detailed description of the device]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a lid for an underground structure, which includes a lid body and a receiving frame having a support portion that fits and supports the lid body, and more particularly to a lid for an underground structure that does not cause an obstacle in a snowy area. is there.

[0002]

[Prior art]

 As is well known, for waterworks, city gas, etc., various valve elements such as sluice valves are installed in the middle of pipes laid underground, and these valve elements are protected from earth pressure and the load of passing vehicles as well as above ground. In order to enable the operation from the above, an underground structure lid including a lid main body and a receiving frame supporting the lid main body is provided above the valve body.

[0003]

[Problems to be solved by the device]

 However, in the case of conventional lids for underground structures, the upper end of the receiving frame projects from the road surface, or the lid body is slightly tilted when fitted, or the receiving frame is deformed and the lid body is slightly raised. In the event of a snowfall in winter, the blade of the snowplow will be caught on the periphery of the receiving frame and the receiving frame will be damaged, or it will collide with the side peripheral surface of the lid body and damage the lid body. are doing. The present invention has been proposed in view of the above, and an object of the present invention is to provide a lid for an underground structure that allows a blade of a snowplow to easily pass therethrough without causing any obstacle even when installed in a snowy area.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a lid for an underground structure, which comprises a lid main body and a receiving frame having a supporting portion for fitting and supporting the lid main body. Form a smooth curved buffer part that inclines downwardly, or form a narrow inclined surface at the upper end of the support part of the receiving frame, or smooth an outward downward inclination in the upper edge of the receiving frame. A curved buffer portion and a narrow inclined surface are formed at the upper end of the support portion of the receiving frame. The lid body is supported with its upper surface lower than the receiving frame upper surface.

[0005]

[Embodiment of the invention]

 The cushioning part formed on the upper edge of the receiving frame has a curved surface that slopes downward toward the outside, which allows the blades of the passing snow plow to be smoothly guided to the upper surface of the receiving frame and shock is applied to the receiving frame. Prevent that. Further, the narrow inclined surface provided on the upper end of the support portion of the receiving frame thereby smoothly guides the blade of the snowplow passing through the upper surface of the lid main body to the upper surface of the receiving frame again to apply an impact to the receiving frame. Prevent that. Furthermore, if the upper surface of the lid body is supported lower than the upper surface of the receiving frame, even if the lid body is fitted with a slight tilt or the receiving frame is deformed and slightly lifted, the blade of the snowplow will not be removed. Prevents collision with the lid body.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The lid for an underground structure of the present invention comprises a lid main body and a receiving frame having a supporting portion for fitting and supporting the lid main body. In the illustrated embodiment, the outer peripheral surface has a substantially vertical cylinder. The casing 1 composed of the outer cylindrical body 2 whose upper and lower ends are open and the inner cylindrical body 3 screwed into the outer cylindrical body 2 corresponds to the receiving frame referred to in the present invention.

On the inner peripheral surface of the outer cylinder body 2, a female screw portion 4 having a coarse pitch is provided so as to be raised. In addition, a notched portion 5 having no thread is provided in a part of the inner peripheral surface in the axial direction to serve as a sediment discharging portion. Therefore, when soil or the like enters between the inner tubular body 3 and the outer tubular body 2, the inner tubular body 3 can be rotated to discharge the earth and sand from the cutout portion 5. Further, a mounting portion 6 extending in the inner circumferential direction is formed at the lower edge of the outer cylindrical body 2 so that the mounting portion 6 can be stably mounted on the upper surface portion of the lower rod P, and the mounting portion 6 A stopper portion 7 for preventing lateral displacement of the outer cylindrical body 2 is formed by suspending the inner edge of the lower cylindrical body P so as to be in close contact with the inner peripheral surface thereof. In the illustrated embodiment, the lower edge of the outer cylindrical body 2 is extended in the inner peripheral direction to form the mounting portion 6, but the mounting portion 6 may be provided in the outer peripheral direction. It is also possible to form a fastening hole in the mounting portion 6 and fix it to the lower frame P through a bolt.

On the other hand, below the outer peripheral surface of the inner cylindrical body 3, a male screw portion 8 having a coarse pitch is screwed up so as to be screwed into the female screw portion 4 of the outer cylindrical body 2. It should be noted that the male screw portion 8 only needs to be provided on the lower portion of the inner cylindrical body 3 by several pitches. Then, a fixing device 9 for fixing the inner cylindrical body 3 to the outer cylindrical body 2 after the bulk adjustment is completed is provided on the inner peripheral surface of the inner cylindrical body 3 corresponding to the male screw portion 8. The fixing device 9 has a nut 11 fixed to the inside of a support frame 10 having a U-shaped cross section which is bulged on the inner surface of the inner cylinder 3, and a bolt 13 is passed through a through hole 12 formed in the support frame 10 to provide the nut 11. The tip of the bolt 13 can be projected to the outside of the inner cylindrical body 3 from the recess 14 on the outer surface side of the support frame 10. In the illustrated embodiment, the fixing devices 9 are provided at three positions at 120 ° intervals, but the fixing devices 9 may be provided at two positions or at four or more positions.

A buffer portion 15 having a smooth curved surface is formed at the upper edge of the inner cylindrical body 3 of the illustrated embodiment corresponding to the receiving frame of the present invention, and is slanted downward toward the outside. A tilted fitting portion 19 is provided which is provided with a flange portion 16 extending inward in the inner peripheral direction via 15 and constitutes a support portion 18 for fitting and supporting a lid body 17 described later from the inner edge of the flange portion 16. Extend downwards.

Therefore, in the present invention, when the vehicle passes over the housing 1, the shock-absorbing portion 15 smoothly guides the vehicle to the upper surface of the housing 1 and prevents the housing 1 from being impacted. To do. Similarly, the blades of the snow plow are similarly smoothly guided to prevent the chassis 1 from being impacted.

Further, at the corner between the flange portion 16 and the slant fitting portion 19, that is, at the upper end of the supporting portion 18, a narrow slant surface 20 is slanted downward at an inclining angle of about 45 degrees in the inner circumferential direction. The sloped surface 20 is followed by the inner peripheral surface of the sloped fitting portion 19 having a steep slope.

Then, a brim-shaped support piece 21 is extended from the lower edge of the inclined fitting portion 19 in a substantially horizontal direction to form a support portion 18 of the lid body 17. The support piece 21 is provided so that the upper surface of the lid body 17 is slightly lower than the inclined surface 20 of the inner cylinder 3 when the lid body 17 is fitted in the inclined fitting portion 19. That is, the lid body 17 fitted and supported by the support portion 18 is set so as not to project from the upper end of the receiving frame. In the illustrated embodiment, the support portion 18 is provided with a plurality of support pieces 21 ..., and one support piece 21 'is largely extended to form a hinge receiving portion 22, and the hinge receiving portion 22 is provided with the hinge receiving portion 22. Opens an opening 24 through which a hinge member 23 provided in a lid body 17 described later is inserted.

Further, the lower surface of the flange portion 16 is for reinforcement that connects the lower surface 16 ′ of the flange portion 16, the outer peripheral surface 19 ′ of the tilt fitting portion 19 and the inner peripheral surface of the inner cylindrical body 3. The ribs 25 are appropriately provided in the radial direction at six positions, for example, every 60 degrees. By virtue of the ribs 25, the strength of the inner cylinder 3 is significantly improved in combination with the structure of the flange portion 16 described above.

It should be noted that the upper surface of the flange portion 16 may be provided with small protrusions 26 or color markings for non-slip or decoration.

On the other hand, the lid main body 17 has a side peripheral surface corresponding to the inner peripheral surface of the inclined fitting portion 19, and a hinge member 23 is provided on a part of the peripheral portion of the lower surface. Therefore, when the hinge member 23 is inserted into the opening 24 of the hinge receiving portion 22 formed in the inner cylindrical body 3 and the lid body 17 is fitted into the inclined fitting portion 19, the upper surface of the inner cylindrical body 3 is closed. be able to . If the lid body 17 is turned upside down using the hinge member 23 as a fulcrum, the upper surface of the inner cylindrical body 3 can be opened, and a sluice valve (not shown) housed inside the housing 1 can be operated and inspected. can do. When the lid main body 17 is closed, the upper surface of the lid main body 17 is located slightly below the inclined surface 20 of the inner cylindrical body 3, and the upper surface of the lid main body 17 is the flange portion of the inner cylindrical body 3. Since it does not protrude from 16, even if the lid body 17 is fitted with a slight inclination or the inner cylinder body 3 is deformed and the lid body 17 is in a slightly raised state, the blade of the snowplow vehicle There is no risk that the lid body 17 will be damaged due to collision with the like.

The housing 1 of the lid for an underground structure according to the present invention has the above-described configuration, and the inner cylindrical body 3 is housed inside the outer cylindrical body 2 before being installed in the ground, and the male screw part 8 is screwed into the female screw portion 4, and the tip of the bolt 13 is prevented from protruding to the outer surface of the inner cylindrical body 3. If a locking portion (not shown) is provided at the lower end portion of the female screw portion 4 of the outer cylinder, if the lower end of the male portion 8 comes into contact with the locking portion, it will not rotate any further. 3 does not come off below the outer cylinder. Further, a sand / sand intrusion prevention ring 27 made of rubber, synthetic resin, or the like is fitted to the upper edge of the outer tubular body 2 so that the female screw portion 4 and the male screw portion 8 are inserted through the gap between the outer tubular body 2 and the inner tubular body 3. Sediment may be prevented from entering the screwed portion.

In order to install the above-mentioned housing 1 in the ground, a vertical hole is dug from the ground surface into the ground, the lower walls P ... The outer cylinder body 2 accommodating the inner cylinder body 3 is placed on the upper surface of the lower container P ′, and the inner cylinder body 3 is rotated to make the upper surface of the housing 1 by the female screw portion 4 and the male screw portion 8 the ground surface. The bolt 13 of the fixing device 9 is rotated to project the tip from the inner cylindrical body 3, and the tip of the bolt 13 is pressed against and fixed to the inner surface of the outer cylindrical body 2. Therefore, the outer tubular body 2 and the inner tubular body 3 are integrated, and the inner tubular body 3 does not slightly move and move up and down, and rattling does not occur. Then, the outer circumference of the lower container P and the outer cylindrical body 2 is backfilled, and the periphery of the outer cylindrical body 2 is filled with earth and sand, paving material, etc., and sufficiently compacted. In addition, if a handle is provided on the outer peripheral surface of the outer cylindrical body 2, the transportation and the installation work can be facilitated.

In the housing 1 installed as described above, the pavement surface is worn down due to the passage of time, or the subsidence causes the receiving frame, that is, the housing 1 to relatively rise, and the upper part of the housing 1 is the ground surface. When the vehicle passes through or the snowplow rides on the housing 1, the vehicle smoothly rides on the flange portion 16 from the buffer portion 15 provided on the outer edge of the flange portion 16 and having a gently curved surface. . Therefore, no impact is applied to the housing 1, and the blades of the snow removal vehicle can escape by licking the upper surface of the housing 1. Further, since the lid body 17 is set so as not to project from the upper end of the receiving frame, the blade of the snow removal vehicle is not caught on the lid body 17.

Furthermore, according to the illustrated embodiment, when the position of the lid body 17 is raised or lowered for repairing the road surface, the bolts 13 of the fixing device 9 are loosened and the inner cylinder 3 When the lid main body 17 reaches a desired height by rotating, the bolt 13 may be tightened. In this case, in the present embodiment, since the inner cylinder 3 is rotated, earth and sand and the like do not remain in the gap between the inner cylinder 3 and the outer cylinder 2, and the inner cylinder is easily raised, It can be lowered.

Although the present invention has been described with reference to the embodiments of the drawings, the present invention is not limited to the above-described embodiments, and can be appropriately implemented unless the configuration described in the claims for utility model is changed. . For example, in the illustrated embodiment, the receiving frame is composed of an inner cylindrical body and an outer cylindrical body screwed with each other, but the receiving frame may be composed of a general cylindrical body.

[0021]

[Effect of the invention]

 In summary, the present invention relates to an underground structure lid including a lid main body and a receiving frame having a support portion that fits and supports the lid main body, and is inclined downward toward the upper edge of the receiving frame. Since a smooth curved buffer portion is formed, it is possible to smoothly guide the blades of the passing snow plow to the upper surface of the receiving frame and prevent the receiving frame from being impacted. Since a narrow inclined surface is formed at the upper end of the support part, the blade of the snow removal vehicle that passes over the upper surface of the lid body is smoothly guided to the upper surface of the receiving frame again to prevent impact on the receiving frame. Further, since a smooth curved buffer portion that slopes downward toward the outside is formed at the upper edge of the receiving frame, and a narrow inclined surface is formed at the upper end of the supporting portion of the receiving frame, the lid is formed. If the upper surface of the main unit is supported lower than the upper surface of the receiving frame, There or fitted slightly tilted, even when the receiving frame is somewhat lifted shaped purposely deformed, the blade or the like of the snowplow is prevented from colliding with the lid body.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a housing.

FIG. 2 is a plan view showing a lower half portion in cross section.

FIG. 3 is a front view of a lower portion of the inner cylinder.

FIG. 4 is a longitudinal sectional view showing a state in which an inner cylinder is housed and fixed in an outer cylinder and a lid body is fitted.

FIG. 5 is a partially cutaway explanatory view of a state of being installed underground.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing (reception frame) 2 Outer cylinder (reception frame) 3 Inner cylinder (reception frame) 15 Buffer part 16 Flange part 17 Lid body 18 Support part 19 Inclined fitting part 20 Inclined surface 21 Support piece

Claims (5)

[Utility model registration claims] 1. An underground structure lid comprising a lid main body and a receiving frame having a support portion for fitting and supporting the lid main body, wherein the upper edge of the receiving frame has a smooth, downwardly sloped outward edge. A lid for an underground structure, wherein a curved buffer portion is formed. 2. An underground structure lid comprising a lid main body and a receiving frame having a supporting portion for fitting and supporting the lid main body, wherein a narrow inclined surface is formed at an upper end of the supporting portion of the receiving frame. A lid for an underground structure, characterized in that: 3. The underground structure cover according to claim 1, wherein a narrow slope is formed at an upper end of the support portion of the receiving frame. 4. An underground structure lid comprising a lid main body and a receiving frame having a support portion for fitting and supporting the lid main body, wherein the lid main body is supported with its upper surface being lower than the upper surface of the receiving frame. A lid for underground structures. 5. The underground structure cover according to claim 1, wherein the cover body is supported with its upper surface being lower than the upper surface of a receiving frame.