JP2505916Y2 - Drainage basin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a drainage basin installed in a residential land or the like, and more particularly to a structure for connecting branch pipes.

(Prior art) Conventionally, drainage basins installed in residential land, etc. are large in size because they are made of concrete or polypropylene and are prone to water leakage, and there is a problem when they are installed in narrow residential land. Small drainage basins made of vinyl resin have become popular. Conventionally, such a small drainage pipe made of vinyl chloride resin has a shape in which pipes having smooth surfaces which form a receptacle for connecting a drainage main pipe, a tubular body for cleaning and the like are combined.

However, in the conventional drainage basin made of vinyl chloride resin, the position of the connection port to which the branch pipe for draining drainage from homes etc. is connected is predetermined at the molding stage, and the connection position of the drainage branch pipe is the position of the drainage basin. When it did not match, it was difficult to connect the drain branch pipe.

Further, for example, as described in Japanese Utility Model Publication No. 54-29175, it is known to form a thin punch groove for punching a connection port in a cylindrical body portion of a pit body.

(Problems to be solved by the invention) However, as described in Japanese Utility Model Publication No. 54-29175, there is a limit to the position where a thin punching groove is provided in order to punch a connection opening in the main body of the pipe, and the branch pipe is If the position of the connection port to be connected does not match the position of the punching groove of the drainage basin body, it is difficult to connect the drainage branch pipe. Also, if the basin body is molded with vinyl chloride resin, Has a low fluidity, and it is difficult to deeply form a punching groove in the cylindrical body portion, and there is a problem that it is not easy to cut with a cutter using vinyl chloride resin.

Therefore, it is conceivable to use a hole saw in the drainage pipe main body made of vinyl chloride resin to form an opening at an appropriate position for the connection port. However, when forming a connection port with a hole saw in the drainage basin body made of vinyl chloride resin,
If the position of the drill part at the center of the tip of the hole saw is not determined, the opening cannot be accurately formed. In particular, the cylindrical surface of vinyl chloride resin has a smooth surface and is curved, so the drilling part of the hole saw may slip off the specified position, which is dangerous, and the opening should be opened accurately at a precise position. It is difficult to form, and there is a problem that the connection port cannot be easily formed after molding in the cylindrical body portion whose surface is smooth and curved.

The present invention is intended to solve such a problem, and after the drainage basin body made of vinyl chloride resin is molded, a hole saw is used to accurately, easily and safely form a connection port at an appropriate position. It provides a drainage basin that can be used.

(Means for Solving the Problems) The drainage basin of the present invention has receptacles for connecting drainage mains at both ends, and a cylindrical body is integrally projected at an upper portion of an intermediate position between these receptacles. And a plurality of small recesses for engaging a central drill portion of a hole saw for opening a connection port are formed on an outer peripheral surface of a cylindrical portion of the drainage basin body. .

(Operation) In the drainage basin of the present invention, when the drainage basin body is molded with vinyl chloride resin, the drainage basin main body is formed of a plurality of small holes for engaging the central drill portion of the hole saw with the outer peripheral surface of the upper cylindrical portion at the middle position of the pair of receptacles. The recess is formed in advance. Then, for construction on residential land, connect the drainage main to the preformed inlet,
When connecting the branch pipe, a connection port is formed by a hole saw in the cylindrical portion in accordance with the position of the branch pipe, and the branch pipe is connected to this connection port. At that time, the tip of the drill part at the center of the hole saw is engaged with the small recess at the position of the connection port among the plurality of small recesses on the outer peripheral surface of the cylindrical body, and the drill part slides when performing cutting work with the hole saw. It is possible to open the connection port reliably and easily without the need.

(Embodiment) Hereinafter, a configuration of an embodiment of the present invention will be described with reference to the drawings.

The drainage basin body 11 is integrally molded with vinyl chloride resin, and has cylindrical receiving ports 12, 1 at both ends of the drainage basin body 11.
Have 3 each. A drainage main pipe (not shown) is fitted into and connected to the receiving ports 12 and 13, respectively.
Further, a cylindrical tubular portion 14 whose upper end opening serves as a cleaning port from the surface of the earth is integrally formed at the upper part of the intermediate position of both receiving ports 12 and 13 of the drainage basin body 11. And the socket
12, 13 and the cylindrical body 14 communicate with each other inside the drainage basin body 11.

Further, a plurality of small recesses 16 are formed on the outer peripheral surface of the cylindrical body portion 14. These small recesses 16 are integrally formed beforehand when the entire drainage basin is molded. As shown in the drawing, the small concave portions 16 are formed horizontally in the middle portion of the outer peripheral surface of the cylindrical body portion 14 along the entire circumference thereof. The adjacent small concave portions 16 are, for example, 15 ° to 30 ° with respect to the central axis of the cylindrical body portion 14.
is seperated. In addition, a plurality of small recesses 16 are provided on both sides of the outer peripheral surface of the tubular portion 14 that are substantially parallel to the axial direction of the receiving ports 12 and 13 and are located below the small recesses 16 arranged along the entire circumference. Are formed respectively. As shown in FIG. 3, each of the small concave portions 16 is formed in a conical shape having a small apex angle, and the tip of the drill portion at the center of the hole saw (not shown) can be engaged.

 Next, the operation of the above embodiment will be described.

The drainage basin main body 11 is buried in the ground in a residential land or the like, and a drainage main is connected to preformed receiving ports 12 and 13. During this construction, when connecting a branch pipe for draining drainage from households, etc., a connection hole 17 is formed with a hole saw in accordance with the position of the branch pipe connected to the tubular portion 14, and this connection port is formed.
The branch pipe is connected to 17 through packing not shown.

When forming the connection port 17 with this hole saw,
Engage the tip of the central drill portion of the hole saw with the small recess 16 of the plurality of small recesses 16 on the outer peripheral surface of the cylindrical body portion 14 that is aligned with the position of the connection opening to be opened, and open the connection opening with this hole saw. The cylindrical body part made of vinyl chloride resin
Despite making holes in 14, the hole saw will not shake and the center position of this hole saw will be maintained accurately. That is, it is possible to prevent the drill portion of the hole saw from slipping and shifting from the predetermined position. Therefore, the connection port 17 can be formed accurately, easily, and safely with good appearance.

Further, since the connection port 17 has a plurality of small recesses 16 in the tubular body portion 14 even if the opening position differs depending on the position of the branch pipe,
It can be easily formed at a necessary and appropriate position.

In the above embodiment, since there are many small recesses 16 around the entire circumference of the tubular portion 14, the connection port 17 can be formed by opening the connection port 17 in almost any horizontal direction. It is not necessary to form it on the circumference.

(Effects of the Invention) According to the present invention, a plurality of small recesses are formed on the outer peripheral surface of the cylindrical body portion of the drainage basin body made of vinyl chloride resin in which the cylindrical body portion is integrally projecting above the intermediate position of the pair of receptacles. Therefore, when the connection port for connecting the branch pipe is formed by the hole saw after the drainage basin body is molded, by engaging the tip of the drill portion at the center of the hole saw with an appropriate small recess,
The hole saw can be prevented from shaking, and the connection port can be accurately, easily, and safely formed at an appropriate position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a drainage basin showing an embodiment of the present invention, and FIG.
FIG. 3 is a front view of the same as above, and FIG. 3 is a sectional view taken along line III-III of FIG. 11 …… Drainage basin body, 12,13 …… Receiving port, 14 …… Cylinder part, 16
…… Small recess, 17 …… Connection port.

Claims (1)

(57) [Scope of utility model registration request] 1. A drainage basin body made of vinyl chloride resin, which has receiving ports for connecting drainage main pipes at both ends, and a cylindrical body integrally projecting above the middle position of these receiving ports. The drainage basin is characterized in that a plurality of small recesses are formed on the outer peripheral surface of the cylindrical body of the drainage basin body so as to engage with a central drill portion of a hole saw for opening a connection port.