JPH0421918Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a drainage basin made of synthetic resin, and particularly to a connection structure between an invert and an extension ring.

(Prior art) Conventionally, generally, a drainage basin has a groove-shaped receiving part formed at the upper end of the invert into which the lower end of the extension ring is inserted, and the invert and the extension ring are connected to the groove-shaped receiving part of the invert. The connection structure was such that the lower ends of the additional rings were simply placed one on top of the other so that they could be inserted. Incidentally, there is also known a drainage basin in which a treatment ring is provided between the invert and the extension ring, and the treatment ring and the addition ring are slidably connected. Also, the connection structure was such that the lower end of the processing ring was simply placed over the groove-shaped receiving part of the invert.

However, when such drainage basins are used in cold regions, in the event of frost heaving, which occurs when the soil freezes and swells in the winter, the addition ring or treatment ring will be lifted up with the soil, causing the invert A gap was created at the connection between the additional ring or the invert and the treatment ring, and earth and sand, or in severe cases, tree roots could enter the interior through the gap.

Therefore, a drainage basin as described in Japanese Utility Model Publication No. 62-9425 has been devised.

In this conventional drainage basin, a connecting tool is provided at the connection part between the groove-shaped receiving part of the invert and the lower end of the additional ring, and the invert and the additional ring are connected to each other with screws through this connecting tool. By firmly connecting them with screws in this way, the aim was to prevent the addition ring from being lifted up and removed from the invert due to frost heaving.

(Problems to be solved by the invention) However, in the case of such conventional drainage basins, not only does the number of parts increase due to the use of connectors and screws, but it is also difficult to align the screw holes of the invert and the additional ring. There was a problem that the work was complicated by the addition of additional work and screw fixing work, and the workability was poor.

Furthermore, when a frost heave phenomenon occurs, there is a problem in that since there is nothing to relieve the external force acting on the drainage basin, cracks or damage are likely to occur at the connecting portion between the invert and the extension ring.

(Means for solving the problem) The present invention was made with the purpose of solving the above-mentioned problems.To achieve this purpose, the present invention uses an inverter made of synthetic resin. , a processing ring, and an extension ring, the upper end of the invert and the lower end of the processing ring are connected, and the processing ring and the addition ring are connected to each other so as to be slidable in the axial direction. The upper end of the invert includes:
A groove-shaped receiving part into which the lower end of the processing ring is inserted is formed, and an inner peripheral surface of the groove-shaped receiving part;
The lower ends of the processing rings are formed with fitting parts that can be fitted to each other in a state that prevents them from coming off when inserted, and at least one of the fitting parts is inverted or annular over the entire circumference of the processing ring. This means that it is formed in

(Function) In the drainage basin of the present invention, a fitting part is formed on the inner circumferential surface of the groove-shaped receiving part of the invert and the lower end of the treatment ring so that they can fit into each other in a state that prevents them from coming off when inserted. Therefore, the invert and the processing ring can be connected by simply pushing the lower end of the processing ring into the groove-shaped receiving part of the invert and fitting the fitting parts together using the elasticity of the resin. can. Moreover, since at least one of the fitting parts of the invert and the processing ring is formed in an annular shape over the entire circumference, fitting is possible no matter which direction the processing ring is set during pushing. .

In this way, when the invert and the treatment ring are fitted and connected to each other, the treatment ring is lifted together with the soil due to frost heave phenomenon and comes off the invert, or a gap is created in the connection part. can be prevented. In addition, since the processing ring and the extension ring are connected so that they can slide in the axial direction, the external force that acts due to the frost heaving phenomenon can be absorbed by the expansion and contraction movement of the processing ring and the extension ring. It is possible to reduce the spread of external force to other parts such as the connecting part of the ring.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of the first embodiment shown in FIGS. 1 and 2 will be explained.

The drainage basin of this embodiment is formed by injection molding using a synthetic resin such as low-foam polypropylene, and as shown in Fig. 2, an invert 1,
It is composed of a processing ring 2, an additional ring 3, and a lid 4. This drainage basin is constructed by stacking the treatment ring 2 and the additional ring 3 on top of the invert 1 and burying it in the ground.
It is used with the following.

The invert 1 is for draining wastewater into the main sewage pipe through the connecting pipe 8. In addition to the Y-shaped invert having two inlets 11, 11 and one outlet 12 as shown in FIG. There are letter-shaped ones, straight ones, band-shaped ones, etc., and the one that is used is appropriate depending on the place of use.

At the upper end of this invert 1, there is provided a groove-shaped receiving part 15 consisting of an inner wall 13 and an outer wall 14, and on the inner circumferential surface of the outer wall 14, three fitting protrusions 16 each having a triangular cross section are provided at four locations. Books are arranged side by side.
Note that the inner wall 13 is formed lower than the outer wall 14.

The processing ring 2 is provided with a fitting protrusion 21 having an inverted triangular cross section on the outer circumferential surface of the lower end, and is capable of fitting into the fitting protrusion 16 of the invert 1 in a manner that prevents it from coming off. 21 is additional ring 3
There are three wires arranged in a ring around the entire circumference.

That is, the invert 1 and the processing ring 2 are configured so that the lower end of the additional ring 3 is pushed into the groove-shaped receiving part 15 of the invert 1 by using the elasticity of the synthetic resin, and the fitting protrusions 16 and 21 are fitted into each other. Can be connected by

In addition, since the fitting protrusion 21 provided at the lower end of the processing ring 2 is formed in an annular shape over the entire circumference of the processing ring 2, the processing ring 2 can fit into the groove-shaped receiver of the invert 1. When pushing into the part 15, it can be fitted in any direction, and workability is good.

Furthermore, an L-shaped receiving part 22 is formed at the upper end of the processing ring 2, and an O-ring 5 is provided on this L-shaped receiving part 22.

Further, 6 is a cap, which is attached to the outer peripheral surface of the L-shaped receiving part 22 of the processing ring 2 by fitting (fitting part 61) and holds the O-ring 5, as shown in FIG. , forming a roughly inverted L-shape in cross section,
It is formed in a ring shape along the outer periphery of the processing ring 2.

The additional ring 3 is inserted into the inner peripheral surface of the processing ring 2 so as to be slidable in the axial direction, and watertightness with the processing ring 2 is ensured by the O-ring 5.

At the upper end of this additional ring 3, there is a groove-shaped receiving part 31 having the same shape as the invert 1, which is composed of an inner wall 32 and an outer wall 33, and the lid 4 is dropped into this groove-shaped receiving part 31. ing.

In this way, invert 1 and processing ring 2
are connected to each other by fitting, so that the treatment ring 2 is prevented from being lifted up together with the soil and removed from the invert 1 due to frost heave phenomenon, or from being damaged if a gap is created in the connecting portion.

In addition, since the processing ring 2 and the additional ring 3 are connected so as to be slidable in the axial direction, the external force acting due to the frost heaving phenomenon is absorbed by the expansion and contraction movement of the processing ring 2 and the additional ring 3, and the inverter is It is possible to reduce the spread of external force to other parts such as the connecting part between the processing ring 1 and the processing ring 2, and in other words, it is possible to prevent cracks, damage, etc.

Furthermore, with the simple structure of just providing the fitting protrusions 16 and 21, the invert 1 and the processing ring 2 can be easily connected with one-touch operation, and workability is significantly improved. Furthermore, the fitting protrusions 16 and 21 also function as a water stopper, improving the watertightness between the invert 1 and the processing ring 2.

Next, a second embodiment shown in FIG. 3 will be described.

In describing the second embodiment, the same components as those in the first embodiment are given the same reference numerals, and the explanation thereof will be omitted. Further, regarding the operations, explanations of operations similar to those of the first embodiment will be omitted.

In this embodiment, first, an inner wall 72 and an outer wall 73 forming a groove-shaped receiving part 71 of an additional ring 7 that is slidably provided with respect to a processing ring 2 are shown.
Among them, fitting protrusions 74 are provided at four locations on the inner peripheral surface of the outer wall 73.
Three are placed side by side. Further, by separately using an additional ring 8 having a fitting protrusion 81 on the outer circumferential surface of the lower end and stacking it on the additional ring 7, the height of the entire drainage basin is adjusted.

Note that 82 is a groove-shaped receiving portion formed from an inner wall 83 and an outer wall 84.

Therefore, not only when connecting the invert 1 and the processing ring 2, but also when stacking the additional rings 7 and 8, the elasticity of the synthetic resin is used to connect the lower end of the upper additional ring 8 to the lower additional ring. The connection can be made by a one-touch operation, such as pushing into the groove-shaped receiving portion 7 and fitting the fitting protrusions 74 and 81 into each other.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and any design changes that do not depart from the gist of the present invention are included in the present invention. It can be done.

For example, in the example, the invert, treatment ring, extension ring, and lid that make up the drainage basin are all made of synthetic resin, but the lid may also be made of metal or resin concrete. .

Further, in the embodiment, only the fitting part formed at the lower end of the processing ring is annular, but the invert fitting part may also be formed into an annular shape together with the fitting part of the processing ring. Alternatively, the fitting part of the processing ring may be partially formed, and the fitting part of the invert may be formed in an annular shape.

Furthermore, the shape of the fitting part is not limited to the embodiment,
Further, the number of stages is not limited to the embodiment. For example, the fitting portion formed at the lower end of the additional ring may have two stages, and the fitting portion formed at the upper end of the invert may have three stages. When the number of stages is varied in this way, the height of the drainage basin can be finely adjusted by shifting the fitting position.

(Effects of the invention) As explained above, the drainage basin of this invention has a simple structure that only includes a fitting part, and the connection between the invert and the treatment ring can be easily made with one-touch operation, making it easy to install. performance is significantly improved.

In addition, the invert and processing ring are connected by fitting, which not only prevents the processing ring from coming off when frost heaving occurs or creating a gap in the connecting part, but also prevents the processing ring from being connected to the processing ring. The expansion and contraction movement of the ring absorbs the external force acting on the drainage basin, reduces the spread of the external force to other parts, and prevents cracks and damage.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing the buried state of the drainage basin according to the first embodiment of the present invention, Fig. 2 is an exploded perspective view of the drainage basin according to the first embodiment, and Fig. 3 is an exploded perspective view of the drainage basin according to the second embodiment. It is a longitudinal cross-sectional view showing a buried state. 1...Invert, 15...Groove receiving part, 16
... Fitting protrusion (fitting part), 2... Processing ring,
21... Fitting protrusion (fitting part), 3... Additional ring.

Claims (1)

[Scope of utility model registration request] It includes an invert, a processing ring, and an additional ring made of synthetic resin, and the upper end of the invert and the lower end of the processing ring are connected, and the processing ring and the additional ring are axially oriented toward each other. A drainage basin that is slidably connected,
A groove-shaped receiving portion into which the lower end of the processing ring is inserted is formed at the upper end of the invert,
Further, fitting portions are formed on the inner circumferential surface of the groove-shaped receiving portion and the lower end portion of the processing ring, so that the fitting portions can be fitted to each other in a state that prevents them from coming off when inserted, and at least one of the fitting portions is A drainage basin characterized by being formed in an annular shape over the entire circumference of an invert or treatment ring.