JP2022128208A - Receiving frame of lid body for manhole - Google Patents

Abstract

To provide a receiving frame of a lid body for a manhole which can prevent phenomena such as floating or scattering of a lid body while using a conventional lid body.SOLUTION: A receiving frame 10 of a lid body for a manhole has an inner frame part 20 which constitutes an inner wall and is arranged with a lid body for a manhole, an outer frame part 30 arranged outside the inner frame part 20, and an upper end 40 connecting upper ends of the inner frame part 20 and the outer frame part 30, and has an opened upper end opening 41 in the upper end 40 and an opened lower opening in the inner frame part 20, wherein the upper end opening 41 and the lower opening communicate with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a receiving frame for arranging a manhole cover.

Heavy rain or so-called guerrilla downpour may increase the amount of rainwater in the pipeline. In such a case, if the rainwater processing capacity is exceeded, the water level in the pipeline will rise, causing the air hammer phenomenon and water hammer phenomenon, and the pressure generated by this will cause the manhole cover to rise from the receiving frame. Phenomena such as scattering or scattering occur.

In order to prevent such a phenomenon, Japanese Unexamined Patent Application Publication No. 2001-26938 discloses that "an iron manhole cover seat 1 and an iron manhole cover 2 that is fitted and loaded into a loading portion 4 provided on the inner surface of the opening are provided. , A manhole iron cover structure in which a closing lock mechanism having an internal pressure release function is provided between the manhole iron cover 2 and the manhole iron cover seat 1, and the closing cover lock mechanism is located on the lower surface side of the manhole iron cover 2 and the locking structure 10 provided between the manhole iron cover seat 1, and the joint projection 8 and joint The manhole cover structure is characterized in that each of the joint recess 9 and the locking structure 10 is provided with a floating gap E that allows the manhole cover 2 to rise when the internal pressure is released. ” is disclosed.

In the iron manhole cover structure of the above invention, the iron manhole cover seat 1, which is the receiving frame, and the iron manhole cover 2, which is the lid body, are provided with a closing lid lock mechanism having an internal pressure release function, so that It is possible to prevent phenomena such as an air hammer phenomenon or a water hammer phenomenon occurring when the water level rises, causing the lid body to rise from the receiving frame or scatter.

However, in order to prevent the lid from floating or scattering, the above invention requires a dedicated lid and a dedicated receiving frame. Therefore, at least conventional lids cannot be used.

JP-A-2001-26938

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a manhole cover which can prevent phenomena such as floating or scattering of the cover while using the conventional cover. It is to provide a receiving frame.

In order to solve the above-mentioned problems, the manhole cover receiving frame of the first aspect comprises an inner frame portion that forms an inner wall and arranges the manhole cover, and an outer frame portion that is arranged outside the inner frame portion. , an upper end connecting the upper ends of the inner frame and the outer frame, an upper end opening opening in the upper end, and a lower opening opening in the inner frame, and an upper end The opening and the lower opening communicate with each other.

In addition, the receiving frame for the manhole cover according to the second aspect includes an inner frame portion that forms an inner wall and on which the manhole cover is arranged, an outer frame portion that is arranged outside the inner frame portion, and an inner frame portion and the outer frame. and an upper end connecting the upper end with the part, the upper end having an upper end opening that opens, and a notch-shaped notch below the inner frame, and the notch is , and the upper end opening.

The manhole cover receiving frame of the third aspect further includes a height adjusting portion for arranging the manhole cover receiving frame of the first or second aspect.

Further, the manhole cover receiving frame of the fourth aspect further includes a height adjusting portion for arranging the manhole cover receiving frame in the first aspect or the second aspect, the height adjusting portion comprising: It has a recessed groove having an annular shape in plan view and an inner opening communicating with the groove and opening inward.

INDUSTRIAL APPLICABILITY The present invention is constructed and operates as described above, so that it is possible to prevent the phenomenon of the lid floating or scattering while using the conventional lid. A receipt frame can be provided.

It is the top view of the receiving frame of the lid for manholes of 1st Embodiment, and its partial enlarged view. A is a sectional view taken along the line IIA-IIA of the partially enlarged view of FIG. B is a partially enlarged view of FIG. 1 taken along arrow IIB. It is the top view of the receiving frame of the lid for manholes of 2nd Embodiment, and its partial enlarged view. A is a cross-sectional view taken along line IVA-IVA of the partially enlarged view of FIG. B is an enlarged partial view of FIG. 3 taken along line IVB. It is a top view of a height adjustment part. A is a cross-sectional view taken along line VIA-VIA in FIG. B is a VIB arrow directional view of FIG. A is a plan view of the second height adjustment unit. B is a cross-sectional view of A taken along line VIIB-VIIB. A is a plan view of a state in which an adjustment ring is arranged on a manhole, a height adjustment part is arranged, and a receiving frame of the manhole cover of the first embodiment is arranged. B is a cross-sectional view of A taken along line VIIIB-VIIIB. A is a plan view of a state in which a second height adjustment part is arranged above the manhole and the receiving frame of the manhole cover of the first embodiment is arranged. B is a cross-sectional view of A taken along line IXB-IXB. A is a plan view of a state in which a second height adjustment part is arranged above the manhole and a receiving frame of the manhole cover of the second embodiment is arranged. B is a cross-sectional view of A taken along line XB-XB.

Hereinafter, the receiving frame 10 of the manhole cover according to the first embodiment will be described with reference to the illustrated embodiments. The manhole cover receiving frame 10 of the first embodiment is for arranging the manhole cover 500 in its interior 11, and has a substantially annular shape in plan view. Therefore, the shape of the inside 11 is also approximately circular in plan view (see FIGS. 1, 2A, 2B, and 8B).

The manhole cover receiving frame 10 of the first embodiment has an inner frame portion 20 on which the manhole cover 500 is arranged and an outer frame portion 30 surrounding the inner frame portion 20 . The inner frame portion 20 literally serves as the inner wall of the manhole cover receiving frame 10 , and the outer frame portion 30 literally serves as the outer wall of the manhole cover receiving frame 10 . In addition, the inner frame upper end portion 21 that is the upper end of the inner frame portion 20 and the outer frame upper end portion 31 that is the upper end of the outer frame portion 30 are connected by the upper end portion 40, and are below the upper end portion 40. , the space portion 60 between the inner frame portion 20 and the outer frame portion 30 is an empty space. In this manner, the manhole cover receiving frame 10 is formed in a double frame structure of the inner frame portion 20 and the outer frame portion 30 .

An outer flange portion 32 is arranged at the lower portion of the outer frame portion 30 so as to be substantially horizontal in cross section and protrude outward, literally supporting the outer frame portion 30 . A plurality of ribs 33 are arranged on the outer frame portion 30 so as to connect the outer frame portion 30 and the outer flange portion 32 .

An inner flange portion 22 is disposed at the lower portion of the inner frame portion 20 so as to protrude inward and substantially horizontally in a cross-sectional view. In addition, the inner frame portion 20 has an inclined surface 23 that slopes from the inner frame upper end portion 21 toward the inner flange portion 22 toward the inside 11 . The manhole cover 500 described above is fitted to the inclined surface 23 . A shelf portion 24 is provided above the inner flange portion 22 that is the lower end portion of the inner frame portion 20 and below the inclined surface 23 . The shelf portion 24 protrudes into the interior 11 and has a collar shape. It also has a lower opening 26 that opens between the shelf 24 and the inner flange 22 .

An upper end portion 40 connecting the inner frame upper end portion 21, which is the upper end of the inner frame portion 20, and the outer frame upper end portion 31, which is the upper end of the outer frame portion 30, is provided with an upper opening portion 41. ing. The upper openings 41 are arranged at 36 places in a plan view of the manhole cover receiving frame 10 of the first embodiment.

In addition, the inner frame lower end portion 22 a that is the lower end portion of the inner flange portion 22 of the inner frame portion 20 and the outer frame lower end portion 32 a that is the lower end portion of the outer flange portion 32 of the outer frame portion 30 are the lower end portion of the space portion 60 . 61. Also, the lower end 61 is open. Therefore, the lower opening 26 and the upper opening 41 communicate through the space 60 and they also communicate with the lower end 61 . In addition, the inner frame lower end portion 22a has a concave portion 22b that fits with a protruding portion 710 having a convex shape in a side view of the second height adjusting portion 700, which will be described later.

Next, the receiving frame 100 of the manhole cover of the second embodiment will be described. The manhole cover receiving frame 100 of the second embodiment is also for arranging the manhole cover 500 in its interior 110, and has a substantially annular shape in plan view. Therefore, the shape of the inside 110 is also substantially circular in plan view (see FIGS. 3, 4A, 4B, and 10B).

The manhole cover receiving frame 100 of the second embodiment also has an inner frame portion 120 on which the manhole cover 500 is arranged and an outer frame portion 130 surrounding the inner frame portion 120 . The inner frame portion 120 literally serves as the inner wall of the manhole cover receiving frame 100 , and the outer frame portion 130 literally serves as the outer wall of the manhole cover receiving frame 100 . In addition, the inner frame upper end portion 121, which is the upper end of the inner frame portion 120, and the outer frame upper end portion 131, which is the upper end of the outer frame portion 130, are connected by the upper end portion 140, and are below the upper end portion 140. , the space portion 160 between the inner frame portion 120 and the outer frame portion 130 is an empty space. Thus, the receiving frame 100 of the manhole cover is also formed in a double-frame structure of the inner frame portion 120 and the outer frame portion 130 .

An outer flange portion 132 is disposed at the lower portion of the outer frame portion 130 so as to be substantially horizontal in cross section and protrude outward, literally supporting the outer frame portion 130 . A plurality of ribs 133 are arranged on the outer frame portion 130 so as to connect the outer frame portion 130 and the outer flange portion 132 .

An inner flange portion 122 is disposed at the lower portion of the inner frame portion 120 so as to protrude inward and substantially horizontally in a cross-sectional view. In addition, the inner frame portion 120 has an inclined surface 123 that slopes toward the inside 110 from the inner frame upper end portion 121 toward the inner flange portion 122 . The manhole cover 500 described above is fitted to the inclined surface 123 . Moreover, a shelf portion 124 is provided above the inner flange portion 122 that is the lower end portion of the inner frame portion 120 and below the inclined surface 123 . The ledge 124 protrudes into the interior 110 and has a collar shape. A part of the inner flange portion 122 has a notch portion 126 that opens.

An upper end portion 140 connecting an inner frame upper end portion 121, which is the upper end of the inner frame portion 120, and an outer frame upper end portion 131, which is the upper end of the outer frame portion 130, has an upper opening portion 141. ing. The upper openings 141 are arranged at 36 places in a plan view of the manhole cover receiving frame 100 of the second embodiment.

In addition, the inner frame lower end portion 122a, which is the lower end portion of the inner flange portion 122 of the inner frame portion 120, and the outer frame lower end portion 132a, which is the lower end portion of the outer flange portion 132 of the outer frame portion 130, are connected to the lower end portion of the space portion 160. 161. Also, the lower end 161 is open. Therefore, cutout portion 126 and upper opening 141 communicate through space portion 160 , and cutout portion 126 continues to lower end portion 161 .

Next, the height adjusting portion 600 for placing the manhole cover receiving frame 10 of the first embodiment or the manhole cover receiving frame 100 of the second embodiment will be described. The height adjustment portion 600 has an annular shape in plan view and has a substantially circular space 601 . The height adjusting portion 600 has a concave portion 610 that is annular in plan view and groove-like in side view. Further, a plurality of second grooves 620 are provided radially from the concave portion 610 toward the space 601 in plan view. Further, the second groove portion 620 is inclined so as to gradually descend as it reaches the void 601 in a cross-sectional view.

Also, a second height adjustment portion 700 for placing the manhole cover receiving frame 10 of the first embodiment or the manhole cover receiving frame 100 of the second embodiment will be described. The second height adjustment portion 700 has an annular shape in plan view and has a circular space 701 . Further, the second height adjustment portion 700 has a plurality of protrusions 710 that are arc-shaped and convex in a side view.

Note that the height adjusting portion 600 and the second height adjusting portion 700 described above are arranged with the adjusting ring 800, and then the receiving frame 10 for the manhole cover of the first embodiment or the manhole cover of the second embodiment. It is arranged in order to adjust the height with respect to the road surface when the body receiving frame 100 is placed, and its height (thickness) varies depending on the construction site.

An example of the receiving frame 10 for the manhole cover of the first embodiment having the above configuration will be described. The adjustment ring 800 is arranged on the manhole 900, the height adjustment portion 600 is arranged, and the manhole cover receiving frame 10 of the first embodiment is arranged. Also, the manhole cover 500 is arranged on the receiving frame 10 .

Here, the manhole cover 500 will be briefly described. The manhole cover 500 has a peripheral surface portion 501 which is a side surface, and the peripheral surface portion 501 is the inner frame portion 20 of the receiving frame 10 of the manhole cover of the first embodiment or the manhole lid of the second embodiment. It fits with the inner frame portion 120 of the body receiving frame 100 . Since the manhole cover 500 is conventionally known, further explanation is omitted.

As described above, the adjustment ring 800 is arranged on the manhole 900, the height adjustment portion 600 is arranged, and the manhole cover receiving frame 10 of the first embodiment and the manhole cover on the receiving frame 10 are arranged. When the manhole cover receiving frame 10 of the first embodiment is arranged, the pressure generated in the manhole 900 due to the air hammer phenomenon or the water hammer phenomenon is transferred from the second groove portion 620 in the height adjustment portion 600 to the space portion 60. Since it enters the lower end portion 61 of the manhole cover 500 and is released through the upper opening portion 41, the pressure caused by the air hammer phenomenon and the water hammer phenomenon occurring in the manhole cover 500 can be reduced.

Further, the pressure generated in the manhole 900 due to the air hammer phenomenon or water hammer phenomenon enters the space 60 in the manhole cover receiving frame 10 from the lower opening 26 and is released through the upper opening 41. The pressure caused by the air hammer phenomenon and the water hammer phenomenon occurring in the manhole cover 500 can be reduced.

Conversely, this time, rainwater enters the manhole cover receiving frame 10 from the upper opening 41, and the rainwater flows from the lower end 61 through the space 60 into the recess 610 in the height adjustment portion 600. It descends and further flows into the manhole 900 from the second groove portion 620 .

Next, an example will be described in which the second height adjusting portion 700 is arranged on the manhole 900 configured as described above, and the receiving frame 10 of the manhole cover of the first embodiment is arranged thereon. The manhole cover 500 is arranged on the receiving frame 10 in the same manner as described above. Note that the adjustment ring 800 may not be used.

In this case, the pressure generated in the manhole 900 due to the air hammer phenomenon or water hammer phenomenon enters the manhole cover receiving frame 10 from the lower opening 26, passes through the space 60, and is released through the upper opening 41. be done. In this way, the pressure caused by the air hammer phenomenon and the water hammer phenomenon that occur in the lid body 500 can be reduced.

Conversely, this time, rainwater intrudes into the manhole cover receiving frame 10 from the upper opening 41, and the rainwater flows into the manhole 900 from the lower opening 26 via the space 60. .

Next, an example of the receiving frame 100 for the manhole cover of the second embodiment having the above configuration will be described. The second height adjustment part 700 is arranged on the manhole 900, and the receiving frame 100 for the manhole cover of the second embodiment is arranged thereon. Also, the manhole cover 500 is arranged on the receiving frame 100 .

In this case, the pressure generated in the manhole 900 due to the air hammer phenomenon or water hammer phenomenon enters the manhole cover receiving frame 100 from the notch 126, passes through the space 160, and is released through the upper opening 141. Therefore, pressure due to the air hammer phenomenon and the water hammer phenomenon occurring in the manhole cover 500 can be reduced.

Conversely, this time, rainwater enters the manhole cover receiving frame 100 from the upper opening 141, and the rainwater flows into the manhole 900 from the notch 126 via the space 160. .

As described above, the manhole cover receiving frame 10 of the first embodiment in which the conventional manhole cover 500 is arranged or the manhole cover receiving frame 100 of the second embodiment is susceptible to the air hammer phenomenon and the water hammer phenomenon. Since the pressure generated inside the manhole 900 can be reduced, phenomena such as the manhole cover 500 floating or scattering can be prevented.

Note that the manhole cover receiving frame 10 of the first embodiment or the manhole cover receiving frame 100 of the second embodiment is, for example, a sewage basin cover, a fire hydrant cover, a water control valve cover, a sluice valve cover, and an air valve. Can be used for lids, gas pipe lids, water meter lids. Needless to say, the present invention is not limited to these.

10 Receiving frame 11 Inside 20 Inner frame 21 Inner frame upper end 22 Inner flange 22a Inner frame lower end 23 Inclined surface 24 Shelf 26 Lower opening 30 Outer frame 31 Outer frame upper end Part 32 Outer flange part 32a Outer frame lower end part 33 Rib 40 Upper end part 41 Upper opening part 60 Space part 61 Lower end part 100 Receiving frame 110 of the manhole cover body of the second embodiment Inside 120 Inner frame part 121 Inner frame upper end part 122 Inside Flange portion 122a Inner frame lower end portion 123 Inclined surface 124 Shelf portion 126 Notch portion 130 Outer frame portion 131 Outer frame upper end portion 131 Outer flange portion 132a Outer frame lower end portion 133 Rib 140 Upper end portion 141 Upper opening portion 160 Space portion 161 Lower end portion 500 manhole cover 600 height adjustment part 700 second height adjustment part

Claims (4)

an inner frame portion forming a wall and arranging a manhole cover;
an outer frame portion arranged outside the inner frame portion;
an upper end portion that connects upper ends of the inner frame portion and the outer frame portion;
an upper end opening that opens to the upper end;
a lower opening that opens in the inner frame,
A receiving frame for a manhole cover in which the upper end opening and the lower opening communicate with each other. an inner frame portion forming a wall and arranging a manhole cover;
an outer frame portion arranged outside the inner frame portion;
an upper end portion that connects upper ends of the inner frame portion and the outer frame portion;
an upper end opening that opens to the upper end;
a notch-shaped notch below the inner frame,
The notch portion is a receiving frame for a manhole cover that communicates with the upper end opening portion. 3. The manhole cover receiving frame according to claim 1, further comprising a height adjusting portion for arranging the manhole cover receiving frame. a height adjustment part for arranging the receiving frame of the manhole cover,
The height adjustment section is
a recessed groove having an annular shape in plan view;
3. The receiving frame for a manhole cover according to claim 1, further comprising an inner opening communicating with said groove and opening inward.

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