JP3176480B2 - Method of manufacturing synthetic resin drain masu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing sewage, rainwater or manhole (hereinafter referred to as drainage) made of synthetic resin.

[0002]

2. Description of the Related Art The above-mentioned drainage trough is installed at a connection portion such as a drainage pipe and a sewer pipe buried in the ground, at a bent portion, at a boundary of a site, or at a predetermined distance along a pipeline.

[0003] These drains are usually large. For example, the minimum diameter of a drainage basin called a manhole, which is provided on a road surface for maintenance such as cleaning and inspection, and in which people enter and exit, is 90 cm. In addition, the drainage basin provided on the site is small, but it is still about 30cm in diameter.
It is.

[0004] Accordingly, although these drainage sculptures are often made of concrete, recently, as described in Japanese Utility Model Application Laid-Open No. 53-10135, a drainage made of thermoplastic synthetic resin is used. Are better.

Conventionally, a thermoplastic synthetic resin drainage basin has been produced by melting a thermoplastic synthetic resin with an injection molding machine and injecting the molten synthetic resin into a mold.

As a method of manufacturing a synthetic resin drainage basin by processing a thermoplastic synthetic resin tube, as described in Japanese Patent Application Laid-Open No. 4-371620, a pipe wall of a substantially horizontal branch pipe is disclosed. A manufacturing method is known in which an upper surface is bulged in a mountain shape, the top is cut to form a hole having an annular protrusion, and a tubular side wall is attached to the annular protrusion.

FIG. 4 is a side view showing an example of the shape of a conventional drainage trough.

The drainage basin 1 includes a drainage basin body 2 connected to an underground drainage pipe 5 to form an invert portion through which drainage flows,
The riser 4 includes a rising pipe 4 connected to a connection portion 3 provided on an upper half pipe wall of the main body 2 and extending to the surface of the ground, and a lid 5 having an opening at an upper end of the rising pipe 4.

The riser pipe 4 is required to have a relatively large inner diameter for convenience of inspection and maintenance of the drainage pipe. The inner diameter of the drain main body 2 is restricted in order to facilitate burial work, prevent water leakage from a connection portion with the drain pipe 6, and secure a flow velocity that prevents accumulation of waste. Therefore, there is a demand for a drainage basin having a riser pipe 4 having a larger diameter than the drainage basin body 2.

[0010]

However, in the method of manufacturing a drainage basin with an injection molding machine, the drainage basin is large, so that the injection molding die to be molded becomes large and the high pressure of the thermoplastic resin to be injected is required. It is necessary to increase the precision of the joining surface so that the resin must endure, and so-called burrs, in which the molten thermoplastic resin enters the joining portion of the mold, do not occur.

As described above, in order to manufacture a drainage basin using an injection molding machine, a large-sized die having high strength and high precision is used, so that the die becomes expensive. Therefore, the price of a thermoplastic resin drainage basin is high. Is high.

Therefore, when the amount of demand is small, such as in a special drain basin, it becomes too high and is hardly used.

A method of manufacturing a drain by providing a hole in the pipe wall of the branch pipe, cutting the top of the hole to provide an annular protrusion, and attaching the side wall to the annular protrusion is provided. Since the thickness of the protruding portion is elongated and reduced, it is difficult to attach the side wall to the protruding portion, and at the same time, there is a problem that the mechanical strength of the joint between the protruding portion and the side wall is low. .

In order to manufacture the drainage body 2 by a method other than the injection molding method for connecting the riser body 4 having a larger diameter than the drainage body 2, the riser pipe connection part 3 is formed of a synthetic resin having a larger diameter than the body 2. Drain the lower end of the pipe. Reduce the diameter of the pipe so that it is smaller in diameter than the body 2.
Manufacturing method of bonding to a circular joining opening formed in the upper half of the pipe wall.

However, in this manufacturing method, since the synthetic resin pipe is forcibly reduced in diameter so that the diameter of the synthetic resin pipe becomes smaller than the diameter of the main body 2 and formed into the joint opening, distortion occurs in the joint. Will remain. In addition, the connecting portion 3 in which the end of the synthetic resin pipe having a circular cross section is inserted into the circular joining opening formed in the upper half portion of the pipe wall of the main body 2 of the drainage basin, the connecting portion 3 can be rotated from the joining opening to the joining step. Therefore, the joining position is displaced and drained, so that the joining shape of the joining opening of the main body 2 and the lower end portion of the connecting portion 3 do not properly match, and the joining strength tends to be insufficient.

The present invention has been made in order to solve the above-mentioned conventional problems, and has a large mechanical strength by processing a pipe without using an expensive injection molding method. It is an object of the present invention to provide a method of manufacturing a synthetic resin drainage mast to which a riser pipe can be easily connected.

[0017]

SUMMARY OF THE INVENTION Therefore, a method of manufacturing a synthetic resin drainage basin according to the present invention comprises the steps of: providing a drainage basin made of synthetic resin tubing; A method of manufacturing a synthetic resin drainage mast connected to a rising pipe made of a synthetic resin pipe having a larger diameter than the main body, wherein the connection portion is configured to heat one end of the synthetic resin pipe having a larger diameter than the main body. The joint is formed by pressing and deforming from both sides to form a joint end having parallel pipe wall portions at intervals substantially equal to the diameter of the main body. The above-mentioned object is achieved by a configuration characterized by piercing the drainage body so that the shapes of the end portions match each other, and joining the two, and then reinforcing the FRP including the periphery of the joint. is there.

[0018]

[Action] The connecting part for connecting the rising pipe provided on the drainage body is substantially equal to the diameter of the drainage body by heating and pressing both ends of the synthetic resin pipe with a larger diameter than the drainage body. A joint end having parallel tube walls parallel to the spacing can be easily formed. In addition, the cylindrical wall surface of the synthetic resin pipe having a larger diameter than the main body remains in the pipe wall portion orthogonal to the parallel pipe wall portion.

The shape of the peripheral edge of the joint opening provided in the upper half of the pipe wall of the drainage body is such that the parallel pipe wall portion deformed to be substantially equal to the diameter of the drainage body has a side portion of the drainage body. The opening edge in the direction of the flow path on the upper surface of the main body contacts the opening edge and drains. By forming a hole by piercing the upper half of the pipe wall of the main body of the main body, and performing a molding process to match the shape of the peripheral edge of the joining opening with the shape of the joining end,
Both can be set and fixed in an arrangement state in which the shape of the joining end of the connecting portion matches the shape of the joining opening, and the connecting portion can be easily and reliably drained.

The FR including the periphery of the joined portion
By strengthening P, the mechanical strength is large, and the connection part provided in the drainage body is made of synthetic resin. Can be manufactured.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for producing a synthetic resin drainage basin according to the present invention will be described with reference to embodiments.

FIG. 1 is a side view of a synthetic resin drainage basin manufactured according to one embodiment of the present invention, and the same or corresponding parts as those of the conventional drainage basin are denoted by the same reference numerals.

The drain mast body 2 forming the invert portion
Is made of a synthetic resin circular pipe having a diameter of 250 mm, a pipe connecting part for connecting a drain pipe 6 at both ends, and a connecting part 3 for connecting a rising pipe 4 at an upper half of the pipe wall.

The riser pipe 4 is formed of a thermoplastic synthetic resin circular pipe having a diameter larger than that of the drainage main body 2. A lid (not shown) is attached to the upper end opening of the riser tube 4 so as to be openable and closable.

FIG. 2 is a sectional view of the connecting portion showing a part of the process of forming the joint end 7 of the connecting portion 3 which is a feature of this embodiment.

The connecting part 3 is made of a synthetic resin circular pipe having a diameter of 300 mm larger than the drainage main body 2, and a joining end portion 7 which is joined and integrated with the drainage main body 2 is one end of the material circular pipe. By heating the portion and pressing and deforming it from both sides as shown in FIG. 2, parallel pipe wall portions 8 are formed at intervals of approximately 250 mm which are equal to the diameter of the drainage body 2. In this embodiment, as shown in FIG. 1, an engagement projection 9 for engaging the drainage body 2 is formed at the lower end of the parallel pipe wall 8 at the joint end 7.

The shape of the joining opening for joining and integrating the connecting portion 3 with the upper half portion of the pipe wall of the body 2 of the drainage basin is the joint end portion 7.
Process and shape so that the shape matches.

That is, the parallel pipe wall 8 pressed and deformed so as to be substantially equal to the diameter 250 mm of the drain body 2 corresponds to the pipe wall on the side of the drain body 2, The size of the opening in the flow path direction is substantially equal to the diameter of the joint end 7 of the connecting portion 3 which is larger than the diameter of the main body 2. The upper half of the wall is perforated, and a forming process is performed to match the shape of the peripheral edge of the joining opening with the shape of the joining end 7 of the joining portion 3.

FIG. 3 is a plan view of the drainage main body 2 showing the above-mentioned substantially elliptical joining opening.

In this embodiment, an engaging concave portion 10 which engages with an engaging convex portion 9 provided at a joint end portion 7 of the connecting portion 3 is formed in a peripheral portion of a joint opening of the drainage body 2. is there.

Then, the joining end 7 of the connecting portion 3 is brought into contact with the joining opening provided on the upper half side of the pipe wall of the main body 2 of the drainage basin, and the shapes of the edges are matched with each other, and plastic welding is performed. Strengthen by FRP hand lay-up including the periphery and complete the integrated joining.

In this embodiment, the connecting projection 3 is provided with the engaging projection 9.
The engaging recess 10 is formed in the drainage body 2, but the engaging convexity is formed in the body 2 to drain the engaging recess in the connection tube 3.
Alternatively, a configuration may be employed in which a plurality of engagement protrusions and a plurality of engagement recesses are engaged.

According to the manufacturing method of the above embodiment, the pipe end portion of the connecting pipe having a diameter of 300 mm larger than the drainage body 2 is pressed from both sides and deformed. The parallel tube wall 9 can be easily formed.

Since the parallel end wall 7 is formed at the joint end 7 of the connecting portion 3, the shape of the joint opening provided in the drain main pipe 2 matches the edge shape of the joint end 7. As a result, it is possible to easily and reliably match the edge shapes of each other to complete a strong joint,
The drainage basin can supply a synthetic resin drainage basin to which a riser pipe 4 having a large diameter can be connected.

In addition, in the present embodiment, the above-mentioned effect can be further strengthened and secured by forming the engaging projection 9 on the connecting portion 3 and the engaging recess 10 on the drain body 2. it can.

The manufactured drainage can be formed so that the flow direction dimension of the edge of the joining opening can be formed to be larger than the diameter of the main body 2 of 250 mm.
The cleaning jig can be easily inserted further into the drain pipe 6, which is convenient for the maintenance of the drain 1 and the drain pipe 6.

[0037]

As described above, according to the present invention, the connecting portion for connecting the riser pipe to the drainage main body heats the pipe end portion of the synthetic resin pipe having a diameter larger than that of the drainage main body by heating from both sides. Pressing can easily form parallel tube walls at intervals substantially equal to the diameter of the drainage body.

The shape of the peripheral portion of the joining opening provided in the upper half of the pipe wall of the drainage main body is such that the parallel pipe wall portion deformed to be substantially equal to the diameter of the drainage main body drains the side portion of the drainage main body. The opening edge in the flow path direction of the upper surface of the main body that contacts the opening edge becomes a substantially elliptical joint opening that approximately matches the diameter of the synthetic resin pipe that is the connection material that is larger than the main body diameter. By drilling the upper half of the pipe wall of the main body and performing molding processing to match the shape of the peripheral edge of the joint opening with the shape of the joint end, the shape of the joint end of the connection part is joined The two can be set and fixed in an arrangement that matches the shape of the opening, and the connection can be easily and reliably drained.

The FR including the periphery of the joined portion
By strengthening P, the mechanical strength is large, and the connection part provided in the drainage body is made of synthetic resin. Can be manufactured.

The manufactured drainage basin can be formed so that the flow direction dimension of the edge of the joining opening can be formed larger than the diameter of the drainage body, so that the cleaning jig is drained from the rising pipe into the main body and further into the drainage pipe. It can be easily inserted and is convenient for drainage gutters and drainage pipe maintenance.

[Brief description of the drawings]

FIG. 1 is a side view of a drain basin manufactured according to one embodiment.

FIG. 2 is a sectional view of a connecting portion showing a part of a step of forming a joint end portion of the connecting portion.

FIG. 3 is a plan view of a drainage truss body showing a substantially elliptical joining opening.

FIG. 4 is a side view of a conventional drainage trough.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drain 2 Main drain 3 Connecting part 4 Rise pipe 5 Lid 6 Drain pipe 7 Joining end 8 Parallel pipe wall part 9 Engagement convex part 10 Engagement concave part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E03F 5/02 E03F 5/10

Claims (1)

(57) [Claims] 1. A synthetic resin drainage drain connecting a rising pipe made of a synthetic resin pipe having a larger diameter than the drainage drainage body to a connection portion provided on an upper half portion of a pipe wall of the drainage body composed of a synthetic resin pipe. In the manufacturing method, the connection part is drained.The one end of the synthetic resin pipe having a larger diameter than the main body is heated and pressed and deformed from both sides to drain.The parallel pipe walls having an interval substantially equal to the diameter of the main body are drained. The draining body was pierced so that the shape of the peripheral edge of the joining opening provided in the upper half of the pipe wall of the body and the shape of the joining end coincided with each other, and the two were joined. Later, FRP including the periphery of the joint
A method for producing a synthetic resin drainage muffle, characterized by reinforcing.