JPH0612055Y2 - Masu for underground structures - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a basin for an underground structure in which a mounting position and a direction of an inflow pipe to an outflow pipe can be freely selected.

[Conventional technology]

In order to inspect the water quality of sewage and to inspect and clean the pipelines, each building has an indoor basin, a sewage basin between the sewage main and the domestic basin, and a manhole in the sewer main. ing.

In such a basin for a house, a sewage basin, a manhole, etc., the positional relationship of the inflow pipe with respect to the outflow pipe is different for each basin. For example, in the case of a sewage basin that connects the sewage main to the sewage main, the installation position of the stake is determined by the conditions of the floor plan of the building, the shape of the site, etc. The positional relationship with the outflow pipe changes variously.

Therefore, it has been conventionally practiced to measure the positional relationship between the inflow pipe and the outflow pipe on site and form an opening for attaching the inflow pipe in the peripheral wall portion of the basin for underground structure corresponding thereto.

[Problems to be solved by the invention]

However, it is usual that the opening is formed manually by using a hammer or the like. For this reason, when an opening is formed in a slab body made of cement concrete or the like, cracks are likely to occur near the opening or along the inner peripheral surface. And this crack causes the invasion of water into the basin and causes an excessive load on the sewage treatment facility.

Further, when such a manual work is performed, it is quite difficult to form an opening in a shape corresponding to the outer diameter of the inflow pipe to be connected, and a large gap is generated between the opening and the inflow pipe. . Therefore, the work of repairing this gap with mortar or the like has been troublesome.

Therefore, according to the present invention, the position and direction of the inflow pipe with respect to the outflow pipe can be freely selected, and the opening for connecting the inflow pipe can be easily and surely provided in correspondence with the outer diameter of the inflow pipe. The purpose is to provide a basin for underground structures that can

[Means for solving problems]

In order to achieve the object, the underground structure basin of the present invention is provided with a plurality of thin-walled portions having a diameter corresponding to the outer diameter of the inflow pipe connected to the basin main body, on the peripheral wall of the basin main body. It is characterized in that it is provided with a notch portion engraved on the peripheral edge and a groove portion that radially extends from the center.

[Action]

In the basin for underground structure of the present invention, the thin wall portion formed on the peripheral wall of the basin body is selected according to the mounting position and direction of the inflow pipe with respect to the outflow pipe, and cracks are generated in the groove portion of the thin wall portion. The inflow pipe is connected to the opening separated along the notch.

〔Example〕

Hereinafter, the features of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing a basin for an underground structure according to an embodiment of the present invention.

A plurality of thin wall portions 2 for attaching the inflow pipe are provided on the outer peripheral surface of the cell body 1 of the underground structure vessel along the circumferential direction of the cell body 1. In addition, in this embodiment, the thin portions 2 are provided in upper and lower two stages according to the height of the container body 1, but the number of stages is appropriately changed according to the size of the container body 1 and the like. Further, an outflow pipe attachment opening 3 is formed in the lower portion of the main body 1.

An invert 4 is arranged at the bottom of the basin body 1,
An annular flowing water passage 5 is formed along the inner wall of the basin body 1. The flowing water passage 5 guides sewage or the like that has flowed in through an inflow pipe (not shown) attached by opening the thin portion 2 to an outflow pipe (not shown) attached in the opening 3. for that reason,
The running water passage 5 has a bottom surface which is inclined downward toward the outlet pipe mounting opening 3 side.

FIG. 2 is a sectional view taken along the line II of FIG. 1 showing the thin portion 2. Further, FIG. 3 is a partially developed view of FIG. 2 showing the details of the thin portion 2.

As shown in FIG. 2, the thin-walled portion 2 has five thin-walled portions 2 formed in each step on the peripheral surface of the container body 1. That is, by using any one or a required number of these thin portions 2 as the inflow pipe connecting opening, the position and direction of the inflow pipe with respect to the outflow pipe mounting direction 6 can be freely selected.

As shown in FIG. 3, the thin portion 2 is formed as a circumference having a diameter D equal to the outer diameter of the connected inflow pipe.
Further, a hole forming portion 7 that is much thinner than the thin portion 2 is provided at the center of the thin portion 2. The hole forming portion 7 serves as a bar insertion hole when the hole portion is bored to open the thin portion 2 as described later. Further, a cutout portion 8 is formed on the peripheral edge of the thin portion 2. This notch 8 is
When the thin portion 2 is opened, cracks or breaks are prevented from occurring on the outer periphery of the opening surface.

A plurality of groove portions 21 are provided radially in the thin portion 2 around the hole forming portion 7, and these groove portions 21 serve as guides for cracks generated in the thin portion 2 when a force is applied in the opening direction 15. The groove portion 21 is preferably a tapered groove that is deep on the hole forming portion 7 side and becomes shallower toward the peripheral portion of the thin portion 2.
As a result, the rigidity of the thin portion 2 is weakened and the cutout portion 8
The stress concentration on the As a result, the notch 8
It becomes easy to separate the thin-walled portion 2 from the container body 1 at the boundary.

The thickness of each part described above is, for example, 20
The thickness of the thin portion 2 is 12 to 15 mm, the thickness of the hole forming portion 7 is 5 to 6 mm, and the remaining thickness of the notch portion 7 is 7 to 10 mm.
mm. Thus, by making the hole forming portion 7 thinner than the thickness of the thin portion 2 and the remaining thickness of the notch portion 8,
When the hole forming part 7 is opened by the impact of a pointed tool such as a chisel, the hole forming part 7 is broken, and cracks are generated in the thin part 2 and the cutout part 8 which are other parts. To prevent.

FIG. 4 shows a state in which the thin portion 2 is opened,
First, a hole portion for inserting a bar is formed in the hole forming portion 7 in the manner described above. At this time, since the hole forming portion 7 is formed to be thinner than the other portions, the hole portion can be easily formed without requiring an extra large force. Insert the bar 10 into the hole formed in this way from the outside to the inside of the grid body 1, and attach the large nut 1 to the tip of the bar 10.
1. Install washer 12 and small nut 13. In addition, instead of these large nut 11, washer 12 and small nut 13,
It is also possible to adopt a method in which a thread groove is provided at the tip of the bar 10 and an opening member having a large cross-sectional area is tightened in this thread groove.

In this state, when the operator grips the handle 14 of the bar 10 and applies a force in the opening direction 15 shown by the arrow, the large nut 11 comes into contact with the periphery of the hole to generate a radial force on the thin portion 2. Let Therefore, by easily causing a crack in the radially formed groove portion 21, the notch portion 8 provided in the peripheral edge of the thin wall portion 2 is reliably cracked, and the thin wall portion 2 is easily separated from the sill body 1. . Since the force in the opening direction 15 is provided with the notch portion 8 on the outer peripheral surface side of the grid main body 1, a crack generated in the groove portion 21 when the thin portion 2 is separated from the grid main body 1 has a cutout portion 8. It does not spread to the outside of. for that reason,
The opening formed after the thin portion 2 is separated corresponds to the outer diameter of the inflow pipe connected thereto. Therefore,
The work of repairing a small gap between the opening and the inflow pipe with mortar or the like becomes minor.

In FIG. 4, the thin portion 2 is opened by applying a force in the outer peripheral direction of the container body 1, that is, in the opening direction 15. However, the present invention is not limited to this, and it is also possible to apply a force in the direction of the center of the container body 1. However, when the thin portion 2 is opened by the force in the central direction, it is easy to prevent the crack from spreading on the peripheral wall by providing the groove portion and the notch portion on the inner peripheral surface side of the grid main body 1 easily. It can be opened.

Although the embodiment of the present invention has been described above, in the underground structure tub of the present invention, a hammer may be used to form the opening without using a bar.
In this case, it is not necessary to provide the hole forming portion, and the opening is formed by hitting the substantially center of the thin portion from the side where the groove portion and the notch portion are not formed.

[Effect of device]

As described above, in the underground structure container of the present invention, by providing a plurality of thin-walled portions on the peripheral wall of the container body, it is possible to cope with various positional relationships of the inflow pipe with respect to the outflow pipe. it can. In addition, by applying an impact to the thin wall portion, a crack can be easily generated in the radial groove portion, so that the notch formed in the peripheral edge of the thin wall portion can be surely cracked to correspond to the diameter of the inflow pipe. The opening can be easily and surely formed. Therefore, there is an effect that the work of repairing the gap between the inflow pipe and the opening in the inflow pipe installation work with mortar can be reduced.

[Brief description of drawings]

FIG. 1 shows a basin for an underground structure according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line I--I of FIG. 1, and FIG. 3 is a view for explaining a thin portion in detail. FIG. 4 is a diagram for explaining the work of forming the opening for connecting the inflow pipe. 1: Mouth main body, 2: Thin wall part 3: Outflow pipe mounting opening, 4: Invert 5: Flowing water passage, 6: Outflow pipe mounting direction 7: Hole forming part, 8: Notch part 10: Bar, 11: Large Nut 12: Washer, 13: Small nut 14: Handle of bar, 15: Opening direction 21: Groove

Claims (1)

[Scope of utility model registration request] 1. A plurality of thin-walled parts having a diameter corresponding to the outer diameter of an inflow pipe connected to the container main body are provided on a peripheral wall of the container main body, and the thin-walled parts are notched in the peripheral edge thereof and radially from the center. Masu for underground structures, which is equipped with a groove that expands to