JP2003035386A - Manufacturing method of vertical pipe culvert and the vertical pipe culvert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the simple manufacture of a vertical pipe culvert having a spiral guide passage built-in by securing a spiral guide plate in a pipe securely and firmly. SOLUTION: An inner pipe with the guide plate is formed by cementing the guide plate to a spiral groove formed on the perimeter of the inner pipe, outer pipe with a plurality of sections having the spiral groove formed on the inside surface and providing a flange part is cemented on the inner pipe, by inserting the rim of the spiral guide plate into the spiral groove, and integrally formed by bonding the flange part of the outer pipe with each other installed successively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a vertical conduit (drainage conduit) having a spiral guide passage therein and a vertical conduit.

[0002]

2. Description of the Related Art As a drainage pipe vertically laid on a residential land having a steep slope, there is known a drainage pipe having a spiral flow passage extending from an upper drainage inflow portion to a lower drainage outflow portion. For manufacturing such a vertical pipe, for example, a guide plate extending in a spiral shape and a pipe body into which the guide plate is inserted are formed, and the outer peripheral edge of the spiral guide plate is coated with an adhesive and then inserted into the pipe body. However, the outer peripheral edge of the spiral guide plate is adhered and fixed to the inner peripheral surface of the tube body.

[0003]

In the conventional manufacturing method,
Especially when the pipe length is long, when the spiral guide plate is inserted into the pipe body, the bonding surface rubs, causing the adhesive to flow and form insufficient adhesion, or the bonding surface is clogged with adhesive. In some cases, the spiral guide plate could not be inserted properly into the tube body. Therefore, there is a problem in that manufacturing requires a skilled worker to carefully perform it, which requires a great deal of cost.

In view of such problems of the prior art, it is an object of the present invention to securely and firmly fix the spiral guide plate in the pipe so that the vertical pipe can be easily manufactured.

[0005]

In order to solve the above-mentioned problems, the present invention is directed to manufacturing a vertical pipe with a spiral guide passage provided in a circumferential gap between an inner pipe and an outer pipe which are coaxially arranged. ,
An inner pipe having a spiral guide plate fixed to the outer surface, a plurality of outer pipes having spiral grooves formed on the inner surface and flange portions at the ends,
It is characterized in that the edge portions of the spiral guide plate are fitted into the spiral groove and sequentially mounted, and the flange portions of the outer tube are joined together to form an integral body.

According to this, a plurality of outer pipes shorter than the inner pipe are attached to the long inner pipe with the spiral guide plate, and the flange portions are joined to each other to form a vertical pipe conduit. To be done. To mount the outer tube, while the spiral groove formed on the inner surface of the outer tube is filled with an adhesive, the edge of the spiral guide plate fitted in the spiral groove is placed inside the outer tube while rotating the inner tube or the outer tube. It is done by twisting. In this case, since the adhesive is filled in the spiral groove, the adhesive does not flow, and since the outer tube has a short tube length, the adhesive does not clog, and the inner tube with the spiral guide plate does not get stuck. The outer tube can be mounted on the outer tube by a smooth operation, and the edge portion of the spiral guide plate can be securely fixed in the outer tube. Moreover, since the flange portions of the outer tubes are joined to each other in a surface contact state, it is possible to firmly and easily connect the outer tubes with each other while maintaining high watertightness. In addition, it is preferable that the length of the outer tube is a length corresponding to 2 to 3 pitches (circles) of the spiral guide plate.

Further, according to the present invention, a spiral guide plate is fixed to the outer surface in manufacturing a vertical pipe with a spiral guide passage provided in a circumferential gap between an inner pipe and an outer pipe which are coaxially arranged. An outer tube having a spiral groove formed on the inner surface and a flange portion at the end of the inner tube forms a plurality of unit tubes formed by fitting the edges of the spiral guide plate into the spiral groove. The unit tubes are arranged such that the ends of the tubes are abutted so that the spiral guide flow path is continuous, the inner tubes are connected to each other through a connecting member inserted in both tubes, and the outer tubes are flanged. It is characterized in that the parts are joined and connected to form an integral unit.

According to this, in the inner tube with the spiral guide plate,
Attach an outer tube of the same length as this to form a unit tube,
A vertical pipe is constructed by connecting a plurality of unit pipes. In this case, by setting the pipe length of the unit pipe body to a length that does not hinder the fixation of the spiral guide plate in the outer pipe, for example, a length for a few pitches of the spiral guide plate, Similar to the above, it is possible to obtain a unit tube body in which a spiral guide plate is firmly fixed between the inner tube and the outer tube with a smooth work, and also to obtain a vertical pipe with high watertightness by a simple work. be able to.

In the above structure, in order to fix the spiral guide plate to the inner pipe, a spiral groove into which the inner edge of the spiral guide plate fits is formed on the outer surface of the inner pipe, and the spiral groove is filled with an adhesive. In this state, it is preferable that the inner edge portion of the spiral guide plate is fitted into the spiral groove, the spiral guide plate is fitted to the outer circumference of the inner pipe while rotating the inner pipe or the spiral guide plate, and adhesively joined. In addition, when connecting the short outer pipe or the outer pipe having the same length as the inner pipe with the flange portion, it is preferable to apply a sealant or attach a waterproof packing to the joint surface.

The vertical pipe conduit manufactured according to the present invention comprises a plurality of outer pipes each having a spiral groove formed on the inner surface thereof and a flange portion at the end portion thereof. The inner pipe having the spiral guide plates joined to each other is joined to each other by joining them, and the edge portion of the spiral guide plate is fitted into the spiral groove so as to be coaxially arranged in the outer pipe. . There are two types of vertical conduits, one with a spiral guide channel provided over the entire length and the other with a spiral guide channel provided in a part of the pipeline such as the upper and lower parts. The present invention is applicable as long as it has a structure in which at least a part of the vertical pipe conduit is provided with a spiral guide flow path in the circumferential gap between the inner pipe and the outer pipe.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings. 1 to 5 show a vertical pipe for an embodiment of the present invention, FIG. 1 is a sectional view of a main part of the vertical pipe, FIG. 2 is a front view and a transverse sectional view of an outer pipe whose half surface is broken, and FIG. FIG. 4 is an enlarged view of the spiral groove formed in the outer pipe, FIG. 4 is an external view of the inner pipe, and FIG. 5 is a diagram for explaining the forming process of the spiral guide plate.
Reference numeral 1 is a vertical pipe conduit, 2 is an outer pipe, 3 is an inner pipe, and 4 is a spiral guide plate.

The vertical pipe 1 of the present invention has a spiral guide passage built therein, and the guide passage has an inner peripheral surface of a large-diameter outer pipe 2 and an outer periphery of a small-diameter inner pipe 3 which are coaxially arranged. A spiral guide plate 4 is fixed to the surface. Hereinafter, each member that constitutes the vertical pipe 1 will be described.

The outer tube 2 is formed by using a thermoplastic resin such as vinyl chloride resin or a thermosetting resin, and its tube length is set to a length of about 2 pitches of a spiral guide plate 4 which will be described later. Flange portions 21 and 21 having a plurality of elongated positioning holes 21a formed at both ends are integrally provided, and an outer edge portion of the spiral guide plate 4 can be fitted into the inner surface of the flange portions 21 to a substantially continuous spiral shape. The groove 22 is formed between both openings. The spiral groove 22 may be formed by cutting as shown in FIG. 3 (A), or may be formed by blow molding as shown in FIG. 3 (B).

Like the outer tube 2, the inner tube 3 is made of a thermoplastic resin such as vinyl chloride resin or a thermosetting resin to have a smaller diameter and a longer length than the outer tube 2, and the spiral guide plate 4 is formed on the outer surface thereof. The inner edge portion of the is formed with a spiral groove 31 which is continuous in a spiral shape and which can be fitted in substantially completely between both ends.

The spiral guide plate 4 is a long spiral spiral plate extending vertically from a hollow donut-shaped original plate made of a thermoplastic resin such as vinyl chloride resin and having continuous inclined surface portions which are spirally inclined at a constant pitch. It is processed and configured. More specifically, in order to form the spiral guide plate 4, first, referring to FIG.
As shown in (A), a synthetic resin donut-shaped original plate having a hollow center is provided with notches 41a spirally at a predetermined pitch up to the inner and outer peripheral edges thereof to form a guide plate preform 41. . Next, the preform 41 is heated and softened, and while being stretched in the axial direction, is wound around the outer peripheral groove 42a of the metal cylindrical molding die 42 shown in FIG. Then, the wound preformed body 41 is cooled and cured, and the forming die 42 is rewound and removed,
It is possible to obtain the spiral guide plate 4 shown in FIG. The outer diameter of the spiral guide plate 4 thus formed is the same as the inner diameter of the outer tube 2, the inner diameter is the same as the outer diameter of the inner tube 3, and the axial length is set to an appropriate length. Or inner tube 2
It is set to be approximately the same as the pipe length.

The vertical pipe 1 composed of these members is manufactured by the following steps. First, the spiral guide plate 4 is integrally fixed to the inner pipe 3. The spiral guide plate 4 is fixed to the inner tube 3
In the state where the spiral groove 31 is filled with the adhesive, the spiral guide plate 4
The inner edge portion of the is fitted into the spiral groove 31, the spiral guide plate 4 is swung in the axial direction while being swung, and mounted on the outer circumference of the inner pipe 3,
This is performed by adhesively bonding the inner edge portion of the spiral guide plate 4 to the spiral groove 31.

Next, the outer pipe 2 is sequentially attached to the inner pipe 3 with the guide plate to which the spiral guide plate 4 is fixed. The outer tube 2 is mounted by fitting the outer edge of the spiral guide plate 4 into the spiral groove 22 with the spiral groove 22 filled with an adhesive.
Is rotated and pushed in the axial direction, and the outer edge of the spiral guide plate 4 is adhesively bonded to the spiral groove 22.

Then, the flange portions 21 that are sequentially mounted and abutted against each other at the ends of the adjacent outer tubes 2 are joined together in a state in which a sealing agent is applied to the joining surfaces, and the joined flange portions 21 are joined together.
The bolts and nuts are inserted into each of the elongated holes 21a and fixed together. After that, by mounting the outer tube 2 and fixing the outer tubes 2 to each other over the entire length of the inner tube 3 with the guide plate,
The vertical pipe 1 shown in FIG. 1 is constructed. When a plurality of inner pipes 3 with a guide plate are formed and the vertical pipes 1 are connected by connecting the inner pipes 3, a connecting member 6 described later is used to connect the inner pipes 3 to each other.

FIG. 6 shows a cross section of a main part of a vertical pipe according to another embodiment of the present invention. In the drawing, reference numeral 5 is a unit pipe body.
Reference numeral 6 is a connecting member. In this embodiment, the outer tube 2 and the inner tube 3 are configured to have a tube length of two pitches of the spiral guide plate 4, and these are used to fix the spiral guide plate 4 in the same procedure as described above. The outer pipe 2 is attached to the pipe 3 to form a unit pipe body 5, and the unit pipe bodies 5 are connected to each other to form a long vertical pipe 1
It is configured as one. In this case, the unit pipes 5 are connected to each other by tightly inserting the inner pipes 3 into the end pipes of both pipes in a state where the end portions of the pipes are abutted so that the spiral guide flow paths are continuous. The flange portion 21 that connects the outer pipes 2 to each other is bolted
It is performed by fixing with a nut.

Although not shown, the vertical pipe 1 has a drainage inlet and a drainage outlet of appropriate shapes attached to both upper and lower portions thereof to form a continuous drainage passage.

[0021]

According to the present invention, the outer pipe is composed of a plurality of unit pipes with flanges having spiral grooves on the inner surface, and the spiral guide plate is securely and firmly installed in the gap between the inner and outer pipes by smooth work. It is possible to fix them to each other, and it is possible to join the flange portions of the outer pipes to each other to maintain high water tightness and to construct the vertical pipes by a simple operation.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a vertical pipe according to an embodiment of the present invention.

FIG. 2 is a front view (A) and B of the outer tube with one half cut away.
It is a transverse cross-sectional view (B) taken along the line -B.

3A and 3B are enlarged views of spiral grooves formed in the outer tube.

FIG. 4 is an external view of an inner pipe.

5A and 5B are views for explaining a forming process of the spiral guide plate, FIG. 5A is an external view of a preform, FIG. 5B is an external view of a forming die, and FIG. 5C is an external view of the spiral guide plate. Is.

FIG. 6 is a cross-sectional view of main parts of a vertical pipe according to another embodiment of the present invention.

[Explanation of symbols]

1 Vertical pipe 2 outer tube 21 Flange 22 spiral groove 3 inner tube 31 spiral groove 4 spiral guide plate 5 unit tube 6 Connection member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16L 9/22 F16L 9/22 (72) Inventor Hatao Sakai 1-58 Exit 1-chome, Hirakata, Osaka In-house company mapra (72) Inventor Shigetoshi Nakamura 1-58 exit, Hirakata-shi, Osaka Prefecture F-term in company mapra stock company (reference) 2D063 BA02 BA20 BA31 CA25 CA41 3H111 AA01 BA02 CA02 CA07 CA29 CA33 CA36 CA57 CB02 CB14 CB22 CB28 DA26 DB05 EA02 EA09

Claims (3)

[Claims] 1. When manufacturing a vertical pipe channel in which a spiral guide flow path is provided in a circumferential gap between an inner pipe and an outer pipe coaxially arranged, an inner pipe having a spiral guide plate fixed to an outer surface is provided. A plurality of outer tubes each having a spiral groove formed on the inner surface and a flange portion at the end,
A method for manufacturing a vertical pipe, characterized in that the edge portion of the spiral guide plate is fitted into the spiral groove and sequentially mounted, and the flange portions of the outer pipe are joined together to be integrally configured. 2. When manufacturing a vertical pipe channel in which a spiral guide flow path is provided in a circumferential gap between an inner pipe and an outer pipe which are coaxially arranged, an inner pipe having a spiral guide plate fixed to an outer surface, An outer tube having a spiral groove formed on the inner surface and a flange portion at the end is formed by fitting the edge of the spiral guide plate into the spiral groove to form a plurality of unit tubes, which are connected to each other. Is arranged by abutting the ends of the tubular body so that the spiral guide flow passage is continuous, the inner pipes are connected via a connecting member inserted through both pipes, and the outer pipe is joined by a flange portion. A method for manufacturing a vertical pipe, characterized by being connected and integrally configured. 3. An inner tube having a spiral groove formed on the inner surface thereof, and a plurality of outer tubes having flange portions at their ends are integrally joined by joining the flange portions to each other, and a spiral guide plate is fixed to the outer surface. A vertical pipe conduit having a configuration in which an edge portion of a spiral guide plate is fitted in the spiral groove and is coaxially arranged in an outer pipe.