JPH036672Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a receiving frame for a manhole cover that is attached to the upper part of a manhole hole in a manhole body used mainly in civil engineering works such as water supply and sewerage systems.

[Conventional technology]

1 to 4 show a method and an example of installing a receiving frame in a conventional general construction method. Figure 1 is a cross-sectional view of cast-in-place concrete placed around the outer periphery of a cast-iron manhole cover frame using the conventional construction method, and Figure 2 is a cross-sectional view of a cast-iron manhole cover frame with anchor bolts attached to the cast-in-place manhole side block using the conventional construction method. Figure 3 is a cross-sectional view of the fixed part, Figure 3 is a cross-sectional view of the part in Figure 2 where a step has been created between the asphalt pavement and the receiving frame due to heavy vehicles, etc. Figure 4 is the condition shown in Figure 2, where the asphalt has been removed by the claws of a snowplow. This is a cross-sectional view of the pavement being scraped.

Among these methods, FIG. 1 shows a method in which after installing a side block of a construction manhole 1, a cast iron receiving frame 2 is installed at a predetermined location, and the surrounding area is surrounded by concrete 3. According to this method, it takes several days for the concrete 3 rolled around the outer periphery of the receiving frame 2 to harden, and there is a drawback that backfilling with earth and sand, etc., and paving of roads cannot be performed during this period.

In addition, Figure 2 also shows a conventional example.
This method involves embedding several anchor bolts 4 in a manhole side block for cast-in-place construction, installing a receiving frame 2 on the anchor bolts, and paving asphalt 5 around the anchor bolts.

In this method, the receiving frame 2 is damaged by the passage of heavy vehicles, etc.
As shown in FIG. 3, a step 6 occurs between the asphalt pavement 5 and the asphalt pavement 5, and the receiving frame 2 is eventually destroyed by the impact of a heavy vehicle or the like.

Furthermore, when a snowplow passes by on a road during snowfall, the claws 7 of the snowplow may enter the step 6 and hit the receiving frame 2, or the claws of the snowplow may scrape the asphalt pavement 5 as shown in FIG. , there are many cases where the receiving frame 2 is eventually destroyed. At this time, the snowplow operator was hit by the steering wheel and other objects due to the impact of the collision.

[Problems to be solved by the invention] Therefore, the present invention aims to prevent the destruction of the receiving frame by integrally installing or configuring the cast iron receiving frame and concrete, and also to complete the construction work quickly.

[Means for solving problems]

In order to achieve the above object, the manhole receiving frame of the present invention is a receiving frame for a manhole cover that is attached to the upper part of the manhole hole of the manhole body, and the upper end is provided with a cover receiving part into which the manhole cover is fitted. an inner frame provided at the lower end of the receiving part with a mounting plate having a plurality of bolt holes corresponding to the plurality of anchor bolts planted on the upper surface of the manhole hole through the hanging part;
Mounting holes are provided on the outer periphery of the inner frame at positions corresponding to the bolt holes of the mounting plate, and the upper surface is inclined outward and lower than the upper edge of the inner frame, and the bottom surface is arranged so as to be lower than the upper edge of the inner frame. It is integrally constructed with an outer frame that is flush with the bottom surface.

〔Example〕

An embodiment of the present invention will be explained below based on the drawings.

Figures 5 to 8 in the drawings relate to embodiments of the present invention, and Figure 5 is a plan view of the receiving frame, and Figure 6 is a plan view of the receiving frame.
The figure is a sectional view taken along the line A-A in Figure 5, Figure 7 is a partial sectional view of the implementation state when the receiving frame is installed in the manhole hole, and Figure 8 is an example diagram when the receiving frame is installed on the manhole body. This is what is shown.

First, 25 and 25a are manhole bodies, and the manhole body 25 has a manhole hole 20.
is provided, and the upper surface 20 of the manhole hole 20
A is a manhole hole 20 in which two or more anchor bolts 21 are implanted as shown in FIG. There is a manhole main body 25a having a.

Next, the receiving frame 10 according to the present invention, which is attached to the upper surface 20a of this manhole hole 20, is composed of an inner frame B and an outer frame C.

The inner frame B is made of metal, and has a diameter that is approximately the same as or slightly larger than the outer diameter of the manhole cover 11, and is approximately the same as or slightly higher than the height of the manhole cover 11. In addition to providing a lid receiving part 12, this lid receiving frame 12 is provided with a step part 12a on the lower end on which the manhole cover 11 is placed, and a hanging portion having a diameter smaller than the outer diameter of the manhole cover 11 is suspended via this step part 12a. A section 13 is provided.

Furthermore, a mounting plate 14 having a bottom surface that comes into close contact with the upper surface 20a of the manhole hole 20 described above is integrally provided at the lower end of the hanging portion 13.

This mounting plate 14 is provided with bolt holes 17 at positions corresponding to a plurality of anchor bolts 21 implanted in the upper surface 20a of the manhole hole 20.

In addition, in the case of a manhole main body 25a in which the anchor bolt 21 is not installed in the upper surface 20a of the manhole hole 20 as shown in FIG. 8, the hole 17 may or may not be provided.

On the other hand, the outer frame C may be made of concrete 15, for example concrete with a compressive strength of about 300 kg/cm ² , which may be poured on-site or integrally formed with the inner frame B in a factory. is inclined toward the outside so as to be lower than the upper edge of the inner frame B, and its bottom surface is flush with the bottom surface of the mounting plate 14, and the mounting plate 14
It is molded to a width that is the same as or greater than the width of the

Furthermore, several reinforcing bars 16 may be placed in this outer frame C to prevent cracks.

Furthermore, this outer frame C has a predetermined number of mounting holes 18 at positions corresponding to the bolt holes 17 of the mounting plate 14.
The mounting hole 18 is formed to have a sufficient area to tighten the nut 22 using a jig.

[Function] In the present invention having the above-mentioned configuration, after the upper surface 20a of the manhole hole 20 of the manhole body 25 is placed at a position lower than the height of the receiving frame 10, for example, the surface of the ground or asphalt pavement 24, the bottom surface of the receiving frame 10 and the manhole It is placed in close contact with the upper surface 20a of the hole 20.

In the case of a manhole body 25 in which an anchor bolt 21 is installed in the upper surface 20a of the manhole hole 20, the bolt hole 17 of the mounting plate 14 and the anchor bolt 21 are aligned, and the anchor bolt 21 is inserted into the bolt hole 17. The bottom surface of the receiving frame 10 is placed on the upper surface 20a while the tip is inserted through, and the nut 22 is fastened through the mounting hole 18 on the opposite side.

In addition, in the case of the manhole main body 25a whose upper surface 20a is a flat surface, the bottom surface of the receiving frame 10 is
Just put it on.

Note that this mounting hole 18 may be left as it is or may be filled with mortar. After the receiving frame 10 is fixed or placed in the manhole hole 20, the soil is poured up to about the upper surface of the receiving frame 10.
Fill with sand or earth, or apply asphalt pavement 24.

Note that 23 represents the claw of the snowplow.

[Effect of idea]

According to the present invention described above, the receiving frame can be immediately placed or attached on the top surface of the manhole side block or the top surface of the manhole hole of cast-in-place concrete, so that
There is no need for cast-in-place concrete for receiving frames as in the past, improving work efficiency.

In addition, if the receiving frame according to the present invention is used in a place where it has a serious effect on snow removal work, as shown in Figure 7, when the claws of the snowplow go into the asphalt pavement, the claws will break into the concrete. Since it is pushed upward along the slope and does not directly impact the receiving frame, it is possible to prevent the receiving frame from breaking.

In addition, in areas where snow removal operations are not affected much during snowfall, the upper part of the receiving frame may not be sloped.

Furthermore, the area around the receiving frame can be filled with earth and sand or paved with asphalt immediately after construction, so the construction period can be shortened and the construction can be completed early.

Furthermore, after the receiving frame is installed in the manhole hole, vehicles can pass through immediately, and the receiving frame is covered with asphalt paving and earth and sand up to the top surface of the receiving frame, so it is possible to prevent the receiving frame from being destroyed by vehicles.

Furthermore, since the claws of the snowplow do not hit the receiving frame, the snowplow operator can smoothly perform snow removal work without being hit by the receiving frame and hitting his body with the handle or other parts.

[Brief explanation of the drawing]

Figure 1 is a sectional view of cast-in-place concrete placed around the outer periphery of a manhole cover frame using the conventional construction method, and Figure 2 is a cross-sectional view of the cast-iron receiver frame fixed to the cast-in-place manhole side mass using anchor bolts using the conventional construction method. Figure 3 is a cross-sectional view of the part in Figure 2 where a step has been created between the asphalt pavement and the support frame due to heavy vehicles, etc. Figure 4 is a cross-sectional view of the part where the asphalt pavement has been removed by the claws of a snowplow in the condition shown in Figure 2. 5 to 8 relate to the embodiment of the present invention, and FIG. 5 is a plan view of the receiving frame;
Figure 6 is a sectional view taken along line A-A in Figure 5, Figure 7 is a partial sectional view of the implementation state when the receiving frame is installed in the manhole hole, and Figure 8 is the implementation state when the receiving frame is installed on the manhole body. This is an example diagram. Explanation of the symbols: 10 is the receiving frame, B is the inner frame, C is the outer frame, 11 is the manhole cover, 12 is the cover receiving part, 14
is the mounting plate, 17 is the bolt hole, 18 is the mounting hole, 1
9 is the upper surface of the outer frame, 20 is a manhole hole, 21 is an anchor bolt, 22 is a nut, and 24 is asphalt pavement.

Claims (1)

[Scope of utility model registration request] It is a receiving frame for a manhole cover that is attached to the upper part of the manhole hole of the manhole body, and the upper end is provided with a cover receiving part into which the manhole cover is fitted, and the lower end of this cover receiving part is attached to the upper surface of the manhole hole through a hanging part. an inner frame provided with a mounting plate having a plurality of bolt holes corresponding to the plurality of implanted anchor bolts;
Mounting holes are provided on the outer periphery of the inner frame at positions corresponding to the bolt holes of the mounting plate, and the upper surface is inclined outward and lower than the upper edge of the inner frame, and the bottom surface is arranged so as to be lower than the upper edge of the inner frame. A receiving frame for a manhole cover that is made up of an integral outer frame that is flush with the bottom surface.