JPS6233810Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a sewage tank that is buried in the ground around buildings such as houses.

Traditionally, this type of chamber is formed into a bottomless cylindrical shape with concrete, and after installation, the bottom of the cylindrical shape is closed off with mortar, but after the mortar dries, there is a gap between the bottom wall and the cylindrical peripheral wall. It has the disadvantage that it creates gaps from which water leaks. Also, when connecting a sewer pipe to a connection hole in the surrounding wall, if the surrounding wall is made of concrete,
Most sewage pipes are made of synthetic resin and are made of different materials, so they cannot maintain sufficient watertightness and water leaks from them, and the diameter of the sewage pipe to be connected is also limited by the inner diameter of the connection hole. This is an inconvenience.

Alternatively, there is a kaisho-masu, which is made of concrete and has a thin-walled part for connecting to a sewer pipe, and arc-shaped grooves are provided above and below the thin-walled part for connecting to the sewer pipe. In this kaisho-masu, sewer pipes of large and small diameters can be connected by cutting out the arc-shaped groove with a sharp mallet or the like and drilling a through hole according to the diameter of the sewer pipe to be connected. The problem is that the work must be done with a hammer, etc., and the cutout is too large, which requires great care and skill. Also, the edges of the through hole cannot be neatly finished, so the inner surface of the connection hole and the sewer pipe There are problems such as a large number of gaps on the outer surface, resulting in poor watertightness, water leakage, and the need for separate waterproofing treatment.

In view of the drawbacks of the conventional products, this invention eliminates water leakage and makes it possible to easily connect sewer pipes of different diameters. A connected box-shaped main body 3 is formed, and the peripheral wall 1 of this main body 3
A plurality of inner and outer annular grooves 4, 5, 6, and 7 are formed into which the end of the sewer pipe P to be connected can fit, and these annular grooves are formed to taper so that the diameter becomes smaller toward the inner depth. Moreover, the thickness of the peripheral wall 1 at the bottoms of these annular grooves 4, 5, 6, and 7 is made thinner than other parts so that it can be cut along the annular grooves.

The details of this invention will be explained based on the illustrated embodiment.The main body 3 has a slightly enlarged upper part, and legs 8, . . . are provided protruding from the four corners of the bottom. A circular thick portion 9 is integrally formed approximately at the center of each peripheral wall 1,
A water hole 10 is formed in this, and around this water hole 10, the annular grooves 4, 5,
6 and 7 are formed. In the illustrated example, the water passage hole 10 is closed by a diaphragm 11, but it may of course have a shape that penetrates inside and outside. Each annular groove 4, 5, 6,
7 correspond to the standard diameter of the synthetic resin pipe that will become the sewage pipe P, and all have tapered ends so that the diameter becomes smaller toward the inside. That is, the depth direction lines of the annular grooves 4, 5, 6, and 7 are inclined toward the center at an angle α with respect to the insertion direction of the sewer pipe P. Therefore, each of the annular grooves 4, 5, 6, and 7 is formed by recessing sufficiently deeply, and the outermost annular groove 4
Annular cutting grooves 12, 13, 14 are provided on the inner surface of the peripheral wall 1 in correspondence with the annular grooves 5, 6, 7 on the inner periphery except for the inner circumference. This makes it possible to easily cut the peripheral wall 1 along the inner circumferential annular grooves 5, 6, and 7 with a knife or the like. In addition, the diaphragm 11
A notch 15 is also formed around the . 16,1
7, 18, 19, and 20 are inner and outer groove edges of the annular grooves 4, 5, 6, and 7.

In the above configuration, for example, when connecting the sewer pipe P that matches the third annular groove 6 from the outside as shown in FIG. 2, the bottom of the annular groove 7 on the inner circumference,
The peripheral wall 1 is cut circularly with a knife or the like between the corresponding cutting grooves 14, the innermost groove edge 20 and the diaphragm 11 are removed, and the outer annular groove 6 is inserted into the end of the sewer pipe P. Insert the parts. The end of the sewage pipe P is held between the inner and outer groove edges 18 and 19 of the annular groove 6, and is tapered due to the shape of the annular groove 6, so the adhesion force with the annular groove 6 is large, and the annular It is maintained in a state where it is fitted into the groove 6.

Similarly, when fitting a sewer pipe into the outermost annular groove 4, cut the peripheral wall 1 between the bottom of the inner annular groove 5 and the corresponding cutout groove 12, and When fitting a sewer pipe into the annular groove 5, the peripheral wall 1 is cut between the annular groove 6 and the cutout groove 13 on the inner circumference. When fitting a sewer pipe into the innermost annular groove 7, the diaphragm 11 is cut out along the notch 15.

If the groove edge on the inner periphery of the annular groove into which the sewage pipe is fitted is left intact and the inner periphery is cut off, water flow through the sewage pipe will not be obstructed.

This invention has the above-mentioned configuration, and since the bottom wall is connected to the peripheral wall of the main body, there is no water leakage from the bottom unlike in conventional chamber walls of this type.

Also, since multiple annular grooves are formed on the peripheral wall of the main body, the sewer pipe can be connected by simply fitting it into the annular groove, shaping it into the desired shape with a mallet, etc., or applying adhesive. The adhesive work can be done easily without the hassle of such troubles. Moreover, depending on the diameter of the annular groove, both large-diameter and small-diameter sewer pipes can be connected, allowing for a wide range of applications.When connected, the elasticity of the synthetic resin allows the ends of the sewer pipe to be clamped to the inner and outer groove edges of the annular groove. Because it will happen,
It has good watertightness and no water leaks from the connection points. Furthermore, since the annular groove is tapered so that the diameter becomes smaller toward the inner depth, the fitting force of the sewer pipe within the annular groove is increased, and there is no fear of it falling off. Further, since annular cutting grooves are provided on the inner surface of the peripheral wall corresponding to these annular grooves, unnecessary annular grooves can be easily and cleanly cut out with a knife or the like.

[Brief explanation of the drawing]

FIG. 1 is a partially cut-away side view of this design chamber, and FIG. 2 is an enlarged cross-sectional view of the main part showing how the sewer pipe is connected. 1... Peripheral wall, 2... Bottom wall, 3... Main body, 4 to 7
...Annular groove.

Claims (1)

[Scope of utility model registration request] A box-shaped main body with a peripheral wall and a bottom wall connected to each other is formed of synthetic resin, and a plurality of annular grooves inside and outside of the same width as the wall thickness of the sewer pipe to be connected are formed on the peripheral wall of the main body, and these grooves are A sewage basin, in which annular grooves are tapered so that the diameter becomes smaller toward the inner depth, and annular cutting grooves are provided on the inner surface of the peripheral wall corresponding to these annular grooves.