JPH0638949Y2 - Drainage pipe connection port - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a structure of a pipe connection port of a drainage basin installed in the middle of a drainage pipe for guiding dirty water from a kitchen or a bathroom to a sewer pipe.

(Prior Art) As shown in FIG. 4 (a), the conventional synthetic resin drainage basin has a pipe connection port 100 formed in a short tubular shape with a uniform inner diameter and having an outer diameter equal to the inner diameter of the connection port. Pipe 101 for drainage to have
Are inserted into the connection port 100 and connected. When the outer diameter of the pipe 101 is smaller than the inner diameter of the connection port 100 as shown in FIG. 9B, the small diameter pipe 101 is connected via the different diameter joint 102.

Also, in manholes and concrete drainage basins,
It has also been proposed to connect a pipe by providing a ring-shaped packing inside the sewer inlet or the connection socket (JP-A-56-9530, JP-B-50-39018, JP-A-5).
1-132848 etc.).

(Problems to be solved by the invention) However, when the pipe connection port 100 shown in FIG. 4 has a short cylindrical connection port with a uniform inner diameter, the pipe 101 and the joint 102 are always inserted in the same direction. It is limited to the direction of the center line L of the connection port 100, and it is impossible to insert and connect the pipe 101 in an oblique direction. Therefore, if the gradient of the pipe 101 is large, the connection is made by using an elbow joint or the like, but if the gradient is slight or if the elbow joint does not match the pipe connection port, the connection is made. It was difficult and increased the labor of construction, and also caused water leakage.

On the other hand, when a ring-shaped packing is provided inside the sewer inlet or the connection socket to connect the pipe, the packing and the pipe are in line contact, so the pipe can be tilted slightly. Therefore, the above problem is solved once. However, in this case, since the packing protrudes inward from the inner surface of the insertion port or socket and the inner diameter of that part is small, align the pipe so that the center line of the pipe and the center line of the packing match. If you do not insert it, you can not insert the pipe smoothly,
If the pipe is forcibly inserted with the center position displaced, the pipe may be caught by the packing and the packing may come off, which makes the insertion work of the pipe troublesome.

The present invention has been made to solve the above problems all at once.
An object of the present invention is to provide a pipe connection port of a drainage basin, which is extremely easy to insert a pipe, and can be connected without fear of water leakage when the pipe is inclined.

(Means for Solving the Problems) In order to achieve the above object, the pipe connection port of the drainage basin according to the present invention has an inner peripheral surface that is curved inward in a cylindrical connection port and has a substantially arcuate cross section. It is formed over substantially the entire length in the direction of the center line of the connection port, the minimum inner diameter portion of the inner peripheral surface is positioned at the substantially center of the connection port in the center line direction, and the portion of the inner peripheral surface in front of the minimum inner diameter portion is formed. The gist is that it is used as a pipe insertion guide surface.

(Operation) According to the pipe connection port of the present invention, the portion of the inner peripheral surface of the convex curved surface having a substantially arcuate cross section formed over substantially the entire length in the direction of the center line of the connection port has a portion in front of the minimum inner diameter portion which is the pipe insertion guide surface. Since the inner diameter gradually decreases from the front end opening toward the minimum central inner diameter portion, when a pipe having an outer diameter substantially equal to the minimum inner diameter is inserted from the front end opening,
The center line of the pipe and the center line of the connection port are automatically aligned by being guided by the pipe insertion guide surface, and the pipe can be smoothly inserted.

Moreover, if the inner peripheral surface of the connection opening is convexly curved with a substantially arcuate cross section as described above, the inserted pipe and the inner peripheral surface of the connection opening will be in line contact with each other. Even if it is tilted in this way, the contact portions of the two are not displaced to the front and the rear and a gap is unlikely to be formed, so that the pipe can be connected without fear of water leakage.

(Examples) Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 is a sectional view of an embodiment of the present invention, in which reference numeral 1 denotes a synthetic resin drainage basin, and an annular groove 3 formed in an upper edge 2 of the drainage basin has a drainage basin. A peripheral portion 5 of a resin concrete lid 4 that covers the upper end opening of the is fitted.

On the lower part of the peripheral wall of the drainage basin 1, a pipe connecting port 6 in the form of a short tube protruding outward is integrally formed, and an inner socket 7 is fitted therein. This inner socket 7
Is for forming an inner peripheral surface 8 inwardly convexly curved in a substantially arcuate cross-section inside the pipe connection port 6 over substantially the entire length in the direction of the center line of the connection port, as shown in FIG. A plurality of (four in this embodiment) collars 10 are provided at substantially equal intervals on the outer peripheral surface of the peripheral wall 9 having a substantially arcuate cross section that can be curved inwardly, and the outer diameter of each collar 10 is the inner diameter of the pipe connection port 6. Is the same as. The width dimension of the peripheral wall 9 in the center line direction is substantially the same as the total length of the pipe connection port 6 in the center line direction (in other words, the depth dimension of the pipe connection port 6).

When the inner socket 7 is fitted into the mouth of the pipe connection port 6, an inner peripheral surface 8 that is curved inward in a substantially arcuate cross section is formed over substantially the entire length of the pipe connection port 6 in the center line direction. The minimum inner diameter portion P of is located substantially in the center of the connection port in the center line direction. The inner diameter gradually increases from the minimum inner diameter portion P toward the front and back, and the portion of the inner peripheral surface 8 on the front side of the minimum inner diameter portion P serves as a pipe insertion guide surface.

Therefore, when a pipe 11 having an outer diameter substantially equal to the minimum inner diameter is inserted from the front end opening of the pipe connection port 6, the center line of the pipe 11 and the center line of the connection port 6 are automatically aligned by being guided by the pipe insertion guide surface. The pipe 11 can be inserted smoothly. When the pipe 11 is inserted in this way, the inner peripheral surface 8 is convexly curved in a substantially arcuate cross section, and therefore the pipe 11 can be in line contact with the inner peripheral surface 8 and tilted as shown in FIG. When the pipe 11 is inclined in this way, the contact portions Q and R between the upper surface portion and the lower surface portion of the pipe 11 and the inner peripheral surface 8 are displaced forward and backward from the minimum inner diameter portion P according to the pipe inclination angle, The contact portions between both side surface portions of 11 and the inner peripheral surface 8 do not deviate and remain in contact at the minimum inner diameter portion P. Therefore, as long as the pipe inclination angle is not considerably increased, a large gap is not formed between the outer peripheral surface of the pipe 11 and the inner peripheral surface 8, and there is almost no risk of water leakage, and the pipe 11 can be freely inclined and connected. Of.

In this case, if an adhesive material is sufficiently attached to the outer peripheral surface of the end of the pipe 11 to insert it, the pipe 11 can be firmly fixed, and furthermore, as shown in FIG. 1, it is between the inner peripheral surface 8 and the outer peripheral surface of the pipe 11. The accumulated adhesive material 12 functions as a gap filling agent and has an advantage of reliably preventing water leakage, which is desirable. Further, it is desirable that the inner socket 7 is made of an elastically deformable synthetic resin or synthetic rubber because the inner socket 7 is appropriately elastically deformed even if the inclination angle of the pipe 11 is considerably large and the contact property with the outer peripheral surface of the pipe 11 is improved. Needless to say, if the inner socket 7 is not used, a pipe matching the pipe connection port 6 can be inserted and connected.

In the above-described embodiment, the inner peripheral surface 8 that is convexly curved is formed in the mouth of the pipe connection port 6 by fitting the inner socket 7. However, the means for forming the inner peripheral surface 8 is not limited to this. For example, as shown in FIG. 3 (a), the inner peripheral surface 8 may be formed by inwardly bending the tubular wall of the short tubular pipe connection port 6 inward in a substantially arcuate cross section. In this case, it is desirable to form a plurality of reinforcing ribs 13 on the outer circumference of the pipe connection port 6.

(Effect) As can be understood from the above description, the pipe connection port of the drainage basin according to the present invention has an inner peripheral surface that is curved inward in a substantially arcuate cross-section inside the cylindrical connection port and has a center line of the connection port. Formed over substantially the entire length of the inner peripheral surface, the minimum inner diameter portion of the inner peripheral surface is positioned substantially in the center of the connection port, and the portion of the inner peripheral surface in front of the minimum inner diameter portion serves as the pipe insertion guide surface. Therefore, compared to the conventional one with a ring-shaped packing on the inner surface,
The pipe insertion work can be performed much more easily and smoothly, and moreover, the pipe can be connected with a slight inclination without fear of water leakage, and it has a small slope such that elbow joints cannot be used. It is very convenient when connecting pipes.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, FIG. 2 is a cutaway perspective view of an inner socket, FIG. 3 (a) is a sectional view of another embodiment of the present invention, FIG. 4 (a) and (B) is a cross-sectional view of a conventional example. 1 ... Drainage basin, 6 ... Pipe connection port, 7 ... Inner socket, 8 ... Convex curved inner peripheral surface, 11 ... Pipe, P ...
… Minimum inner diameter.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical connection port is formed with an inner peripheral surface that is curved inward in a generally arcuate cross section over substantially the entire length in the direction of the center line of the connection port, and the minimum inner diameter portion of the inner peripheral surface is the connection port. A pipe connection port for a drainage basin, characterized in that it is located at a substantially central portion in the center line direction, and a portion of the inner peripheral surface in front of the minimum inner diameter portion is used as a pipe insertion guide surface.