JP5626774B2 - Synthetic resin pipe - Google Patents

Description

  The present invention relates to a synthetic resin pipe.

  As a synthetic resin pipe used for drainage, a flexible drain hose (for example, see Patent Document 1) or a drain pipe that is formed of a hard synthetic resin and does not have flexibility (for example, Patent Document 2). See).

JP 2002-306882 A JP 2005-248588 A

  In the above-described conventional case, in the case of the drainage hose having flexibility, even when the pipe is not linear, it can be bent freely, and therefore, it can be satisfactorily connected to other pipes without any problems. However, when this drainage hose is piped substantially horizontally under the floor or the like, the drainage hose hangs downward, so that there is a difficulty that drainage stays inside the drainage hose.

  On the other hand, in the case of a drainage pipe that does not have flexibility, even when it is piped substantially horizontally, it does not hang downward like a drainage hose, so the difficulty of drainage staying inside the drainage pipe is Absent. However, when the piping is not straight, it is not possible to cope with only the straight pipe type drain pipe, and it is necessary to prepare a curved pipe type drain pipe, and there is a problem that the piping work cannot be performed easily.

  An object of this invention is to provide the synthetic resin pipe | tube which can solve the said problem.

In order to achieve the above object, the synthetic resin pipe of the present invention is characterized by A. A hose body formed of a soft synthetic resin and having flexibility; It is formed in a band shape with a hard synthetic resin, wound spirally around the outer peripheral surface of the hose body, and the inner peripheral surface of one end in the width direction of each winding portion is welded to the outer peripheral surface of the hose body, and the other end in the width direction A synthetic resin tube having a holding body that holds the hose body in a straight state by abutting the outer peripheral surface of the adjacent wound portion with the inner peripheral surface of each winding portion, and the other end in the width direction of each wound portion The inner peripheral surface is fixed to the outer peripheral surface of the adjacent winding portion via a fixing portion that is broken by a bending force that is greater than or equal to the setting acting on the synthetic resin tube.
In addition, the holding body is A.I. A string-like material spirally wound around the outer peripheral surface of the hose body and welded to the hose body; It is wound around the outer peripheral surface of the hose body in a spiral shape, the inner peripheral surface of one end in the width direction of each winding part is welded to the outer peripheral surface of the string-like material, and the inner peripheral surface of the other end in the width direction is adjacent It may have a belt-like material that comes into contact with the outer peripheral surface of the winding portion.
In addition, the fixing portions may be arranged at equal intervals in the circumferential direction on the winding portion.
Furthermore, the fixing part may be continuously arranged in the circumferential direction on the winding part.
In addition, the fixing portion may be formed by welding or bonding with an adhesive.

According to the present invention, since the hose body is held in a straight state by the holding body, the hose body hangs downward even when the synthetic resin pipe is piped substantially horizontally under the floor as a drain pipe. There is no risk of wastewater remaining in the hose body.
Further, if a bending force greater than the setting is applied to the synthetic resin tube, the fixing portion that fixes the adjacent wound portions of the holding body breaks, and the synthetic resin tube can be bent as desired. Therefore, even when the piping is not linear, it is possible to cope with it suitably, and the synthetic resin tube can be satisfactorily connected to other piping without any problems.

It is a side view which shows an example of embodiment of this invention. It is a longitudinal cross-sectional view of FIG. FIG. 3 is a development view of FIG. 2. FIG. 3 is a longitudinal sectional view of FIG. 2 bent. It is explanatory drawing which shows the method of manufacturing the synthetic resin pipe | tube of FIG.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, the synthetic resin tube has a hose body 1 and a holding body 2.

  The hose body 1 is made of a soft synthetic resin and has flexibility. The inner and outer peripheral surfaces of the hose body 1 are smooth curved surfaces, and the inner diameter and the outer diameter are (substantially) constant over the entire axial length. Examples of the soft synthetic resin include olefin-based synthetic resins such as EVA resin, polyethylene resin, and polypropylene resin, or vinyl chloride resin. In this example, for example, a soft vinyl chloride resin is used.

  The holding body 2 holds the hose body 1 in a straight state (straight state, straight pipe state), and is configured in a belt shape with a hard synthetic resin. The holding body 2 is spirally wound around the outer peripheral surface of the hose body 1, and one end in the width direction of each winding portion is welded (fused) to the outer peripheral surface of the hose body 1. The peripheral surface is in surface contact with the outer peripheral surface of the adjacent winding part. In addition, the surface contact part of each winding part is made into 1/2 or more of the width | variety. As the hard synthetic resin, for example, vinyl chloride resin or polyethylene resin is used. In this example, for example, hard vinyl chloride resin is used. The “hard” of the hard synthetic resin is used in comparison with the “soft” of the soft synthetic resin constituting the hose body 1.

  The holding body 2 is composed of a string-like material 4 and a belt-like material 5 in the illustrated example. The string-like material 4 is spirally wound around the outer peripheral surface of the hose body 1 and is welded (fused) to the hose body 1. The band-like material 5 is spirally wound around the outer peripheral surface of the hose body 1, the inner peripheral surface of one end in the width direction of each winding portion is welded to the outer peripheral surface of the string-like material 4, and the other end in the width direction Projecting from the welded portion in the axial direction. The projecting portion is inclined so as to move outward in the radial direction toward the tip, and the inner peripheral surface thereof is in surface contact with the outer peripheral surface of the adjacent winding portion. In addition, the surface contact part of each winding part is made into 1/2 or more of the width | variety.

  As shown in FIG. 3, the inner peripheral surface of the other end in the width direction of each winding portion of the belt-like material 5 is fixed to the outer peripheral surface of the adjacent winding portion via a fixing portion 7. The adhering portion 7 is broken by a bending force of a setting (predetermined) or more acting on the synthetic resin pipe, and in the illustrated example, it is disposed (formed) at equal intervals in the circumferential direction. In addition, the adhering portion 7 may be continuously disposed in the circumferential direction on the winding portion. In this example, the fixing portion 7 is formed by welding (fusion) by electric welding, but may be formed by adhesion using an adhesive.

  When the synthetic resin pipe is manufactured, as shown in FIG. 5, a belt having a constant width made of soft vinyl chloride resin or the like in a semi-molten state is fed from the first molding nozzle 9 of the extruder for strip material of the hose body 1. By continuously extruding the material 10 and spirally winding it on the rotating shaft 11 for molding, overlapping the corresponding end portions in the width direction at the adjacent winding portions, and fusing them together (fusion) The hose body 1 is formed.

  Further, the string-like material 4 made of a semi-molten hard vinyl chloride resin or the like is continuously extruded from the second molding nozzle 13 of the string-like material extruder of the holding body 2, and the string-like material 4 is extruded into the hose body. 1 is wound spirally on the outer peripheral surface of 1 and welded (fused).

  Further, the belt-shaped material 5 made of a semi-molten hard vinyl chloride resin or the like is continuously extruded from the third molding nozzle 15 of the belt-shaped material extruder of the holding body 2 and spirally formed on the outer peripheral surface of the hose body 1. The inner peripheral surface of one end in the width direction of each winding part is welded (fused) to the outer peripheral surface of the cord-like material 4 and the inner peripheral surface of the other end is adjacent to the outer peripheral surface of the adjacent winding part. Abut.

  After that, the inner peripheral surface of the other end in the width direction of each wound portion of the band-like material 5 is welded (fused) at equal intervals in the circumferential direction to the outer peripheral surface of the adjacent wound portion by the electric welding machine 17. Thus, the fixing portion 7 is formed.

  According to the above configuration example, the hose body 1 is formed of a soft synthetic resin and has flexibility. However, as shown in FIG. 2, the holding body 2 configured in a band shape with a hard synthetic resin is spirally wound around the outer peripheral surface of the hose body 1, and one end in the width direction of each wound portion is the hose body. 1 is welded to the outer peripheral surface, and the inner peripheral surface of the other end in the width direction is in surface contact with the outer peripheral surface of the adjacent winding portion, thereby holding the hose body 1 in a straight state. Therefore, even when the synthetic resin pipe is piped substantially horizontally under the floor or the like as a drain pipe, the hose body 1 does not hang downward, and there is no possibility that drainage will remain in the hose body 1.

  Further, when the pipe is not linear, it is necessary to bend the synthetic resin pipe in a curved shape. In this case, if the bending force more than the setting is applied to the synthetic resin tube, the fixing portion 7 that fixes the adjacent wound portions in the belt-like material 5 of the holding body 2 is broken. As a result of this breakage, the adjacent wound portions slide against each other, and the synthetic resin tube can be curved as desired as shown in FIG. Therefore, even when the piping is not linear, it is possible to cope with it suitably, and the synthetic resin tube can be satisfactorily connected to other piping without any problems.

  The present invention can be applied to a synthetic resin pipe for drainage.

DESCRIPTION OF SYMBOLS 1 Hose body 2 Holding body 4 String-like material 5 Strip-like material 7 Adhering part

Claims (5)

A. A hose body formed of a soft synthetic resin and having flexibility;
B. It is formed in a band shape with a hard synthetic resin, spirally wound around the outer peripheral surface of the hose body, and the inner peripheral surface of one end in the width direction of each winding portion is welded to the outer peripheral surface of the hose body, and the other end in the width direction A synthetic resin pipe having a holding body that holds the hose body in a straight state by contacting the outer peripheral surface of the adjacent winding part with the inner peripheral surface of the part,
The inner peripheral surface of the other end in the width direction of each winding part is fixed to the outer peripheral surface of the adjacent winding part via a fixing part that is broken by a bending force more than a setting acting on the synthetic resin pipe. Synthetic resin tube. The holding body
A. A string-like material wound spirally around the outer surface of the hose body and welded to the hose body;
B. The hose body is spirally wound on the outer peripheral surface, the inner peripheral surface of one end in the width direction of each winding portion is welded to the outer peripheral surface of the cord-like material, and the inner peripheral surface of the other end in the width direction is adjacent The synthetic resin pipe according to claim 1, further comprising a belt-like material that comes into contact with the outer peripheral surface of the wound portion.   The synthetic resin pipe according to claim 1 or 2, wherein the fixing portions are arranged at equal intervals in the circumferential direction on the winding portion.   The synthetic resin pipe according to claim 1 or 2, wherein the fixing portion is continuously disposed in the circumferential direction on the winding portion.   The synthetic resin pipe according to any one of claims 1 to 4, wherein the fixing portion is formed by welding or adhesion using an adhesive.

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