JPH0220295Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a mold used in manufacturing drainage basins provided when drainage channels meet.

[Conventional technology]

As shown in FIG. 7, this type of drainage basin 1 consists of an inflow side socket part 11, an outflow side socket part 12, and an inspection port side socket part 13. The pipe axis _A2 has the inflow side socket part 11 and the outflow side socket part 1.
It is perpendicular to the tube axis A ₁ connecting 2. Therefore, in order to incorporate the drainage basin 1 into the drainage channel, the inflow side socket 1
For example, a drain pipe 2 on the residential land side is connected to 1, a drain pipe 3 on the public sewer side, for example, is connected to the outflow side socket part 12, and an inspection pipe 4 connected to the ground is connected to the inspection port side socket part 13. However, in order to prevent waste and mud from accumulating in drainage basin 1, the pipe shaft is
A drainage basin ₁ is buried with a slight inclination to the ground GL so that A 1 is lower towards the outflow side.

Alternatively, in order to tilt the tube axis A ₁ with respect to GL, the tube axis A ₂ of the inspection port side socket 13a is aligned between the inlet side socket 11a and the outlet side socket 12 as shown in FIG.
A drainage basin _1a is also provided which is inclined at a predetermined angle θ toward the inflow side with respect to the perpendicular P to the pipe axis A1 connecting the pipe a.

[Problem that the invention attempts to solve]

In the conventional example shown in Fig. 7, the drainage basin 1 is tilted as a whole, so the inspection tube 4 is also installed tilted, and the
In the GL, there was a problem in that one side of the upper edge of the inspection tube 4 protruded slightly from the ground, causing a person to stumble when walking, or an object colliding with the protruding portion of the inspection tube 4, causing damage.

In the conventional example shown in FIG. 8, the inspection port side socket 13a
If the pipe axis of is made perpendicular to GL, the pipe axis _A1 connecting the inflow side socket part 11a and the outflow side socket part 12a will be
The inspection tube connected to the inspection port side socket 13a becomes perpendicular to the GL, so one side of the upper edge of the inspection tube will not protrude from the ground. do not have. However, in order to manufacture such a drainage basin 1a, injection molding is usually used using thermoplastic synthetic resin as a material, but the inflow side socket part 11a and the outflow side socket part 12 of the injection molding mold are
There is a problem in that the mold part for molding a must be tilted and the mold structure becomes complicated. In addition, in this type of drainage basin, the pipe axis connecting the inflow side socket and the outflow side socket is bent to the right or left; It must be manufactured in a separate mold from that of the

[Means for solving problems]

The present invention provides an inflow side socket part 11b and an outflow side socket part 12b as a means to solve the above-mentioned conventional problems.
and an inspection port side socket 13b, and the pipe shaft connecting the inflow side socket 11b and the outflow side socket 12b is bent at a large angle of 90 degrees, and the inspection port side socket The outer peripheral axis of the mouth part 13b is perpendicular to the pipe axis, and the inner peripheral axis of the socket part 13b on the inspection port side is inclined at an angle θ toward the inlet with respect to the perpendicular to the pipe axis, and the inner peripheral axis of the socket part 13b on the inspection port side The upper end surface of the socket portion 13b is perpendicular to the inner peripheral axis,
Further, the inner periphery of the inspection port side socket 13b has a tapered shape whose diameter gradually decreases downward, and the taper angle α is equal to or larger than the angle θ. The mold has outer molds A, B, and C in which the drainage basins 1b and 1b' have a mold surface shape corresponding to the outer surface shape, and the pair of inflow side socket parts 11b and outflow side socket parts 12b. , consisting of socket part molding inner molds D, E, H, G, CH, R, and N each having a mold surface shape corresponding to the inner surface shape of the inspection port side socket part 13b, and the inspection port side socket part Provided is a mold for a drainage basin, characterized in that the inner mold is rotatable around a perpendicular line to a pipe axis connecting the inflow side socket part 11b and the outflow side socket part 12b. It is something to do.

[Effect]

The drainage basin manufactured by the mold of the present invention has a tapered shape in which the diameter of the inner periphery of the socket on the inspection port side gradually decreases downward, and the taper angle α is set so that the inner circumferential axis of the socket on the inspection port side is on the inflow side. Since the angle θ made with the perpendicular line of the pipe axis connecting the socket part and the outlet side socket part is equal to or larger than that, the inner mold for molding the inspection port side socket part is aligned along the perpendicular line. It can be pulled out, it can be rotated around the perpendicular line, there is no need to tilt the mold part to mold this part, and if the inner mold is rotated, it can be turned to the left. Both curved and right-curved shapes can be manufactured using one mold. The drainage basin manufactured by the mold of the present invention is buried with the inner peripheral axis of the socket on the inspection port side perpendicular to the ground. In this way, the pipe axis connecting the inflow side socket part and the outflow side socket part is inclined so that the outflow side is lowered by a predetermined angle θ with respect to the ground. Therefore, when the inspection tube is connected to the inspection port side socket, the inspection tube becomes perpendicular to the ground.

[Effect of idea]

Therefore, the mold of the present invention has a simple structure and can manufacture both left- and right-curved drainage basins with one piece, and in the drainage basin manufactured in this way, the connected inspection tube The upper edge does not protrude from the ground, and the pipe axis connecting the inflow and outflow ports is tilted toward the outflow side to increase the speed of drainage flowing inside the catch basin. This will prevent dirt and mud from accumulating in the drainage basin.

〔Example〕

An embodiment of the drainage basin manufactured by the mold of the present invention will be described with reference to FIGS. 1 and 2. The drainage basin 1b has an inflow side socket part 11b and an outflow side socket part 12b. , an inspection port side socket part 13b,
The inflow side socket part 11b and the outflow side socket part 12b have a common pipe axis _A1 , and the pipe axis _A1 is bent significantly to the left at an angle of 90 degrees as shown in FIG. and
The outer circumferential axis of the inspection port side socket part 13b coincides with the perpendicular line P of the pipe axis _A1 , and the inner circumferential axis _A2 of the inspection port side socket part 13b coincides with the perpendicular line P from the point _P1 on the perpendicular line P. On the other hand, it is inclined at an angle θ toward the inflow side. Furthermore, the inner periphery of the inspection port side receptacle 13b is tapered so that the diameter gradually decreases downward. The taper angle, that is, the angle between the line l ₁ parallel to the inner circumferential axis A ₂ and the extension line l ₂ of the inner circumferential surface is α
shall be. Normally, the slope of the pipe axis _A1 connecting the inflow side socket part 11b and the outflow side socket part 12b is set to 1/50, which is 1°10'' in terms of angle. Therefore, the pipe axis
In order to incline _A1 by 1°10'' and make the inner circumferential axis _A2 of the actual inspection port side receptacle 13b vertical, θ should be 1°10''. In order to simplify the structure of the injection mold used for manufacturing the drainage basin 1b, which will be described later, the taper angle α is set equal to or larger than θ. When α=θ, l ₂ on the outflow side is parallel to P, that is, the inflow side socket 11
It is perpendicular to the pipe axis _A1 connecting the outlet port 12b and the outlet port 12b. Further, the upper end surface s of the inspection port side socket portion 13b is perpendicular to the inner circumferential axis _A2 . Inside the inflow side socket part 11b, the outflow side socket part 12b, and the inspection port side socket part 13b, there are stepped parts 111 for locking the pipes to be connected, respectively.
b, 121b, and 131b are formed. Furthermore, a seat 14b is provided at the bottom of the drainage basin 1b for stably installing the drainage basin 1b.

Next, a method for manufacturing the drainage basin 1b using the mold of the present invention will be explained.

The drainage basin 1b is usually manufactured from thermoplastic synthetic resin such as polyethylene, polypropylene, polyvinyl chloride, etc. by injection molding using the mold of the present invention. FIG. 3 shows an embodiment of the mold of the present invention. In the figure, A, B, and C are outer molds having a mold surface shape corresponding to the outer surface shape of the drainage basin 1b, and D is an inner mold having a mold surface shape corresponding to the inner surface shape of the inflow side receiving portion 11b. , E is an inner mold having a mold surface shape corresponding to the inner surface shape of the outlet side socket part 12b, and F is an inner mold having a mold surface shape corresponding to the inner surface shape of the inspection port side socket part 13b. It is rotatably supported around the dovetail shaft by a dovetail shaft. H is an inner mold that fills the space between D and H of the inner mold and has a surface shape corresponding to the inner surface shape between the inflow side socket part 11b and the outflow side socket part 12b, and R and N are the inner molds that fill the space between the inner molds Socket part 1
3b, inflow side socket part 11b, and outflow side socket part 12b
The inner mold has a mold surface shape that corresponds to the inner surface shape of the boundary. The above outer molds A, B, C and inner molds D, H,
An injection mold is constructed by combining F, T, C, R, and N, and a molten thermoplastic synthetic resin is applied to a cavity formed between the outer mold and the inner mold through a sprue (not shown), a runner, and a gate. inject. After cooling, pull out the inner molds D and E from the molded product, then pull out the inner mold together with the shaft, and then remove the inner molds J and E from the molded product.
After removing I and N, the molded product is released from the outer molds A, B and C. In this case, as mentioned above, the tube axis
If the inclination θ of the inner circumferential axis A ₂ of the inspection port side socket 13b with respect to the perpendicular P of A ₁ and the taper angle α of the inspection port side socket 13b are equal or α>θ, the inspection port side socket The line _l2 on the outflow side of the opening 13b is parallel to the perpendicular P (in the case of α=θ) or forms an angle that opens upward with respect to the perpendicular P, so the inner periphery of the inspection opening side socket 13b is connected to the inner mold. It does not become an undercut part when it is pulled out along the perpendicular line P. Therefore, the inner type d,
The insertion and withdrawal directions of the inner mold and the inner mold can be made perpendicular to each other, and the number of inner molds is minimized, which simplifies the mold structure.

Next, the inner mold is rotated around the axis T to be in the state shown in FIG. If injection molding is performed in this state, a right-curved drainage basin 1b' as shown in FIG. 5 will be obtained.

As shown in FIG. 6, the drainage basin 1b has a pipe axis A ₁ connecting the inflow side socket part 11b and the outflow side socket part 12b.
is installed at an angle of θ with respect to the ground GL, and the inflow side socket part 11b is connected to, for example, a drainage pipe 2 in the residential area, and the outflow side socket part 12b is connected to, for example, a drainage pipe 3 on the public sewer side. An inspection tube 4 for inspection and cleaning is connected to the inspection port side socket 13b. The tube axis of the inspection tube 4 is the inner peripheral axis of the inspection port side socket 13b.
It coincides with A ₂ and is of course perpendicular to GL. Therefore, the upper surface of the inspection tube 4 can be parallel to and flush with the GL.

The drainage basin of the present invention is not only placed between the residential drainage pipe and the public sewer side drain pipe, but also may be placed between the residential drainage pipes and between the public sewer side drainage pipes.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the present invention. Figure 1 is a plan view of a left-hand bent drainage basin, Figure 2 is a developed cross-sectional view along the pipe axis, and Figure 3 is a diagram showing the pipe axis. Fig. 4 is a cross-sectional development view of the mold along the pipe axis showing the inverted state of the mold into the inner mold, Fig. 5 is a plan view of the drainage basin with a right turn, and Fig. 6 is the piping state. Explanatory diagram,
FIG. 7 is an explanatory diagram of a conventional example, and FIG. 8 is an explanatory diagram of still another conventional example. In the figure, 1, 1b'...Drainage basin, 11b...Inflow side socket, 12b...Outflow side socket, 13b...Inspection port side socket, A, B, C...External mold, D, ho,
He, To, Chi, Ri, Nu... Endotype.

Claims (1)

[Scope of utility model registration request] It consists of an inflow side socket, an outflow side socket, and an inspection port side socket, and the pipe shaft connecting the inflow side socket and the outflow side socket is bent at a large angle of 90°. and
The outer circumferential axis of the inspection port side socket is perpendicular to the pipe axis, and the inner circumferential axis of the inspection port side socket is inclined at an angle θ toward the inlet with respect to the perpendicular to the pipe axis. The upper end surface of the mouth side socket is perpendicular to the inner circumferential axis, and the inner periphery of the inspection port side socket has a tapered shape whose diameter gradually decreases downward, and the taper angle α is equal to the angle θ. A mold for forming a drainage basin having a size equal to or larger than , the outer mold having a mold surface shape corresponding to the outer surface shape of the drainage basin, and the pair of inlet side receptacle and outlet side receptacle. The inner mold for molding the socket part has a mold surface shape corresponding to the inner surface shape of the mouth part and the inspection port side socket part, respectively, and the inner mold for molding the inspection port side socket part is formed of the one inflow side socket part. A forming mold for a drainage basin, characterized in that the mold is rotatable around a perpendicular to a pipe axis connecting the outflow side socket and the outflow side socket.