JP2013117290A - Fluid pipe, and device and method for connecting fluid pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid pipe that can be connected to a joint without fusion boding while maintaining the characteristics of polyethylene, and also requires no additional parts for connection with the joint or can reduce the number of parts.SOLUTION: The fluid pipe 1 includes: a uncrosslinked, heat resistant polyethylene layer 4 having flexibility; and an adhesive layer 5 formed of a synthetic resin material adhesive to a pipe joining part 2a of a joint 2 with an adhesive. The adhesive layer 5 is connected to the heat resistant polyethylene layer 4 through a bonding layer 6 to thereby form the outermost layer of the fluid pipe 1.

Description

  The present invention relates to a fluid pipe, a fluid pipe connecting device having the fluid pipe, and a fluid pipe connecting method for connecting the fluid pipe to a joint.

  Conventionally, as a method of connecting a polyethylene fluid pipe having excellent flexibility and corrosion resistance to a joint, for example, the fluid pipe and the joint are heated, and the melted both are press-fitted and fused. Adopting a method of joining (thermal fusion type joining) or a joint with a heating wire embedded (fusion type joint), and heating the heating wire with the fluid pipe inserted into the joint, There is known a method (electric fusion bonding) in which a joint is heated and melted and fusion-bonded.

  However, in the above-described heat fusion bonding, it takes time to connect. Further, in the above-mentioned electric fusion bonding, the fluid pipe cannot be connected to a joint other than the fusion joint. For this reason, a method for connecting a polyethylene fluid pipe to a joint without fusion bonding has been desired.

  Here, as shown in FIG. 5, the engaging body 103 and the in-core 104 are attached to the end portion 102 of the fluid pipe 101, and the water stop member 107 is attached to the back side of the connection port 106 of the joint 105. After the fluid pipe 101 is inserted into the connection port 106, a substantially U-shaped attachment (not shown) is inserted into the holes 108, 108 provided in the connection port 106, and the rear end 103 a of the engagement body 103. There is a method of connecting the fluid pipe 101 to the joint 105 by engaging with (see Patent Document 1).

JP 2009-58117 A

  However, in the method shown in FIG. 5, it is necessary to separately prepare components such as the engaging body 103, the in-core 104, the water stop member 107, and the attachment body.

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is to be able to be connected to a joint without fusion-bonding while having the characteristics of polyethylene, and to the joint. It is not necessary to separately prepare components for connection with the fluid, or the number of the components can be reduced, and the fluid pipe, the fluid pipe connecting device having the fluid pipe, and the fluid pipe are connected to the joint An object of the present invention is to provide a fluid pipe connection method.

In order to achieve the above object, a fluid pipe, a fluid pipe connecting device, and a fluid pipe connecting method according to the present invention have the following configurations. That is,
The fluid pipe according to the first aspect of the present invention is a flexible fluid pipe made of a non-cross-linked heat-resistant polyethylene layer and a synthetic resin material that can be bonded to the pipe connection portion of the joint with an adhesive. An adhesive layer. The adhesive layer is joined to the heat resistant polyethylene layer so as to form the innermost layer or the outermost layer of the fluid pipe.

  In this fluid pipe, a non-crosslinked heat-resistant polyethylene layer having polyethylene characteristics such as flexibility and corrosion resistance, and an adhesive layer made of a synthetic resin material that can be bonded to the joint pipe connection portion by an adhesive, Is provided. The adhesive layer is bonded to the heat-resistant polyethylene layer so as to form the innermost layer or the outermost layer of the fluid pipe. Therefore, when connecting the fluid pipe to the pipe connecting portion of the joint, first, the contact surface of the adhesive layer or / and the outer peripheral portion or the inner peripheral portion of the pipe connecting portion that comes into contact with the adhesive layer. Then, apply an adhesive. Then, in a state where the adhesive is applied, the fluid pipe is fitted to the outer peripheral portion or the inner peripheral portion so that the adhesive layer and the contact surface are in close contact with each other. Thus, the fluid pipe is connected to the joint using an adhesive. As a result, this fluid pipe can be connected to the joint without fusion-bonding while having the characteristics of polyethylene, and there is no need to separately prepare parts for connection with the joint, or The number of parts can be reduced.

  Further, as in the fluid pipe according to the invention according to claim 2, in the fluid pipe according to claim 1, the synthetic resin material may be nylon, soft vinyl chloride, or other non-olefin resin. Good.

  In the fluid pipe according to claim 1 or 2, like the fluid pipe according to the invention of claim 3, the thickness of the adhesive layer is preferably 0.2 mm to 0.5 mm.

  In addition, the fluid pipe according to any one of claims 1 to 3 includes a joining layer that joins the heat-resistant polyethylene layer and the adhesive layer, like the fluid pipe according to the invention according to claim 4. The adhesive layer may be bonded to the heat-resistant polyethylene layer via the bonding layer. Accordingly, the adhesive layer is firmly bonded to the heat-resistant polyethylene layer through the bonding layer.

  According to a fifth aspect of the present invention, there is provided a fluid pipe connecting device according to any one of the first to fourth aspects, wherein at least the pipe connecting portion is formed of the same material as the adhesive layer. And the joint.

  Further, as in the fluid pipe connecting device according to the invention described in claim 6, in the fluid pipe connecting device according to claim 5, the entire joint may be formed of the same material as the adhesive layer. .

  According to a seventh aspect of the present invention, there is provided a fluid pipe connection method in which the fluid pipe according to any one of the first to fourth aspects is connected to the pipe connection portion of the joint. In the method, the adhesive is applied to a contact surface of the adhesive layer or / and an outer peripheral portion or an inner peripheral portion of the pipe connecting portion that comes into contact with the adhesive layer, and the adhesive layer and the contact layer are applied. The fluid pipe is fitted to the outer peripheral portion or the inner peripheral portion so that the contact surfaces are in close contact with each other.

  According to the fluid pipe according to the present invention, while having the characteristics of polyethylene, it can be connected to the joint without fusion-bonding, and there is no need to separately prepare a component for connection with the joint. Alternatively, the number of parts can be suppressed. Further, according to the fluid pipe connecting device and the fluid pipe connecting method according to the present invention, the fluid pipe can be connected to the joint without fusion bonding, while the fluid pipe has the characteristics of polyethylene, In addition, it is not necessary to separately prepare parts for connecting the fluid pipe and the joint, or the number of parts can be reduced.

It is a figure which shows typically the fluid pipe | tube of one Embodiment of this invention, Comprising: (A) is a cross-sectional view, (B) is a longitudinal cross-sectional view. Similarly, it is a longitudinal cross-sectional view schematically showing a fluid pipe connecting device. It is a figure which shows typically the fluid pipe | tube of other embodiment of this invention, Comprising: (A) is a cross-sectional view, (B) is a longitudinal cross-sectional view. Similarly, it is a longitudinal cross-sectional view schematically showing a fluid pipe connecting device. It is a longitudinal cross-sectional view of the conventional fluid pipe connecting device.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the fluid pipe | tube which concerns on this invention, a fluid pipe | tube connection apparatus, and the connection method of a fluid pipe | tube is demonstrated based on drawing.

  1 and 2 show an embodiment of the present invention. Reference numeral 1 in the figure is a fluid pipe having flexibility, such as a water / hot water supply pipe, a drain pipe, or a water pipe. 2 is a joint to which the fluid pipe 1 is connected, for example, a straight joint (straight joint), an L-shaped joint (elbow joint), a T-shaped joint (cheese joint), a Y-shaped joint (Y joint), Branch pipe joints (headers) and other joints. Moreover, the coupling 2 includes, for example, those provided in a faucet device such as a faucet box. Reference numeral 3 denotes a fluid pipe connecting device having a fluid pipe 1 and a joint 2.

  The fluid pipe 1 includes a non-crosslinked heat-resistant polyethylene layer 4 and an adhesive layer 5 made of a synthetic resin material that can be bonded to the pipe connection portion 2a of the joint 2 with an adhesive. The adhesive layer 5 is bonded to the heat-resistant polyethylene layer 4 so as to form the innermost layer or the outermost layer (in the illustrated embodiment, the outermost layer) of the fluid pipe 1 (see FIG. 1).

  Specifically, the synthetic resin material is nylon, soft vinyl chloride, or other non-olefin resin (preferably nylon or soft vinyl chloride), but is not necessarily limited to these materials. The heat-resistant polyethylene layer 4 is made of a polyethylene resin that is non-crosslinked but has heat resistance, that is, a polyethylene resin that does not need to be hardly melted by crosslinking. Moreover, the heat-resistant polyethylene layer 4 is excellent in flexibility because it is not cross-linked.

  In the illustrated embodiment, the fluid pipe 1 includes a joining layer 6 that joins the heat-resistant polyethylene layer 4 and the adhesive layer 5, and the adhesive layer 5 is joined to the heat-resistant polyethylene layer 4 via the joining layer 6. . The fluid pipe 1 is formed in a state where the heat-resistant polyethylene layer 4 and the adhesive layer 5 are joined via the joining layer 6, and is formed so that the adhesive layer 5 does not easily peel off from the heat-resistant polyethylene layer 4. .

  The adhesive layer 5 is desirably formed as thin as possible within a range in which the function as the adhesive layer can be exhibited. Specifically, the thickness of the adhesive layer 5 is 0.2 mm to 0.5 mm. It is desirable that By doing so, the fluid pipe 1 including the adhesive layer 5 can be reliably molded, and the fluid pipe 1 can maintain flexibility. In the illustrated embodiment, the heat-resistant polyethylene layer 4 is formed relatively thick, and the adhesive layer 5 and the bonding layer 6 are formed relatively thin. Note that the bonding layer 6 is preferably formed as thin as possible within a range in which the function as the bonding layer can be exhibited.

  In the joint 2, at least the pipe connecting portion 2a is made of the same material as that of the adhesive layer 5 (in the illustrated embodiment, nylon, soft vinyl chloride, or other non-olefin resin, preferably nylon or soft vinyl chloride). It is formed (see FIG. 2). Of course, the joint 2 is entirely formed of the same material as the adhesive layer 5 (in the illustrated embodiment, nylon, soft vinyl chloride, or other non-olefinic resin, preferably nylon or soft vinyl chloride). Also good.

  Here, the connection method of the fluid pipe | tube 1 which connects the fluid pipe | tube 1 to the pipe connection part 2a of the coupling 2 is demonstrated. First, on the contact surface 2d of the adhesive layer 5 and / or the outer peripheral portion 2b or the inner peripheral portion 2c (in the illustrated embodiment, the inner peripheral portion 2c) of the pipe connecting portion 2a, which contacts the adhesive layer 5, Apply adhesive. Then, the fluid pipe 1 is connected to the outer peripheral portion 2b or the inner peripheral portion 2c (in the illustrated embodiment, the inner peripheral portion so that the adhesive layer 5 and the contact surface 2d are in close contact with each other in a state where the adhesive is applied. Part 2c).

  Next, the effects of the fluid pipe 1, the fluid pipe connecting device 3, and the fluid pipe 1 connecting method configured as described above will be described. The fluid pipe 1 includes a heat-resistant polyethylene layer 4 having the characteristics of polyethylene and an adhesive layer 5 that can be bonded to the pipe connecting portion 2a of the joint 2 with an adhesive, and the adhesive layer 5 is the innermost layer of the fluid pipe 1. Alternatively, since the outermost layer (in the illustrated embodiment, the outermost layer) is formed and joined to the heat-resistant polyethylene layer 4, it is connected to the joint 2 without fusion-bonding while having the characteristics of polyethylene. In addition, it is not necessary to prepare a separate component for connection with the joint 2 or the number of components can be reduced. Further, the adhesive layer 5 can be firmly bonded to the heat-resistant polyethylene layer 4 through the bonding layer 6.

  Further, in the connection method of the fluid pipe connecting device 3 and the fluid pipe 1, the fluid pipe 1 is connected to the joint 2 without fusion-bonding, while the fluid pipe 1 has the characteristics of polyethylene. In addition, it is not necessary to separately prepare parts for connecting the fluid pipe 1 and the joint 2, or the number of parts can be reduced.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the adhesive layer 5 does not have to be joined to the heat-resistant polyethylene layer 4 so as to form the outermost layer of the fluid pipe 1. For example, as shown in FIGS. You may join to the heat-resistant polyethylene layer 4 so that an inner layer may be formed. In the illustrated embodiment, the adhesive layer 5 is bonded to the heat-resistant polyethylene layer 4 via the bonding layer 6 (see FIG. 3). And when connecting this fluid pipe | tube 1 to the pipe | tube connection part 2a of the coupling 2, on the contact surface 2d contact | abutted with the contact bonding layer 5 of the contact bonding layer 5 or / and the outer peripheral part 2b of the pipe | tube connection part 2a. Apply adhesive. Then, the fluid pipe 1 is fitted to the outer peripheral portion 2b so that the adhesive layer 5 and the contact surface 2d are in close contact with each other in a state where the adhesive is applied.

  Further, the fluid pipe 1 may include a layer other than the heat-resistant polyethylene layer 4, the adhesive layer 5, and the bonding layer 6. Further, in the connection method of the fluid pipe 1, when connecting the fluid pipe 1 to the joint 2, an in-core may be attached to the distal end portion of the fluid pipe 1. Moreover, in the joint 2 shown in FIG. 1 and FIG. 2, the water stop members, such as packing, may be provided in the back | inner side of the pipe connection part 2a.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Joint 2a Pipe connection part 2b Outer peripheral part 2c Inner peripheral part 2d Contact surface 3 Fluid pipe connection apparatus 4 Heat-resistant polyethylene layer 5 Adhesive layer 6 Joining layer

Claims (7)

A fluid pipe having flexibility,
A non-cross-linked heat-resistant polyethylene layer and an adhesive layer made of a synthetic resin material that can be bonded to the pipe connection portion of the joint by an adhesive,
The fluid pipe, wherein the adhesive layer is joined to the heat-resistant polyethylene layer so as to form an innermost layer or an outermost layer of the fluid pipe.   The fluid pipe according to claim 1, wherein the synthetic resin material is nylon, soft vinyl chloride, or other non-olefin resin.   The fluid pipe according to claim 1 or 2, wherein a thickness of the adhesive layer is 0.2 mm to 0.5 mm. A bonding layer for bonding the heat-resistant polyethylene layer and the adhesive layer;
The fluid pipe according to any one of claims 1 to 3, wherein the adhesive layer is bonded to the heat-resistant polyethylene layer via the bonding layer.   5. A fluid pipe connecting device comprising: the fluid pipe according to claim 1; and at least the pipe connecting portion formed of the same material as the adhesive layer.   The fluid pipe connecting device according to claim 5, wherein the joint is entirely formed of the same material as the adhesive layer. A fluid pipe connection method for connecting the fluid pipe according to any one of claims 1 to 4 to the pipe connection portion of the joint,
The adhesive is applied to the contact surface of the adhesive layer or / and the outer peripheral portion or the inner peripheral portion of the pipe connecting portion that contacts the adhesive layer, and the adhesive layer and the contact surface are A method for connecting fluid pipes, wherein the fluid pipe is fitted to the outer peripheral part or the inner peripheral part so as to be in close contact with each other.

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