JP3424051B2 - Piping tools for double piping - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit tool in a double pipe used for inserting a plastic pipe for supplying hot water into a sheath pipe laid as a guide pipe.

[0002]

2. Description of the Related Art In the work of inserting a plastic pipe for supplying hot water into a sheath pipe laid as a guide pipe, FIG.
As shown in Fig. 4, the tip of the plastic pipe p is cut diagonally with a cutter knife to eliminate the resistance of the tip when inserting the sheath tube, and the tapered tip p
₁ has flexibility, and the tip part p ₁ can be easily moved left and right,
One person is pushing the plastic pipe p toward the faucet device side into the sheath pipe.

[0003] When the pods installed have many bends or have a long distance and the pipe cannot be passed through only by pushing, the head h and the screw to which the wire w can be attached as shown in Fig. 3 are attached. Neck part with screws engraved
Using a metal fitting integrally formed with and, the wire w passed from the end portion side (the faucet device side) of the sheath tube is attached to the head h, while the neck portion n is attached to the tip end of the plastic pipe p. Inserting and fixing, the pipe work is performed by two people's operation by pushing from the start end side (header side) of the sheath tube and pulling from the end side of the sheath tube.

[0004]

In the former case of one person working without using a pulling metal, it is impossible to pass a pipe if there are many bends in the sheath tube, and of course the cutting work with a cutter knife is troublesome. , There is also a problem with safety. on the other hand,
In the latter case of a two-person operation using a pulling metal, the pipe passage is good, but it is necessary to insert a wire from the end side of the pod (water faucet device side) in advance, There is a problem in workability in combination with the point of work. In any case, there is currently no push-in technique that allows good workability by one person.

The present invention has been made in view of the above points, and its purpose is to provide good ductility in a single operation by pushing, and a plastic for supplying hot water without damaging the inner surface of the sheath tube. An object of the present invention is to provide a conduit tool for double piping, which is improved so that the pipe can be inserted.

[0006]

In order to achieve the above object, a conduit tool for double piping, which is a feature of the present invention, is
An inner core portion for inserting and fixing a plastic pipe for hot and cold water supply to one side of the flange portion, and a connector in which a convex portion for supporting a plastic pipe for guide described below is continuously projected on the other side, The guide plastic pipe inserted into the convex part and the connector and the guide plastic by penetrating from the tip of the inner core part of the connector to the tip of the guide plastic pipe and providing stoppers at both ends. It is composed of a core wire connected to a pipe.

The retainers provided at both ends of the core wire are formed in a loop by bending both ends of the core wire protruding from the inner core portion of the connector and the respective tip portions of the guiding plastic pipes. Preferably.

[0008]

[Function] If the tip of the hot and cold water supply plastic pipe is inserted and fixed in the inner core portion of the connector and the guide plastic pipe is inserted into the sheath pipe laid as the guide pipe, the guide plastic pipe serves as the guide. , It can be easily inserted from the header side toward the faucet device side only by pushing the hot and cold water supply plastic pipe.
In addition, since the retaining wire for the core wire provided on the tip end side of the guide plastic pipe is formed in a loop shape, this loop-shaped portion faces the installation portion of the faucet device as needed. It can be used as a hook for the pipe pulling operation at the last bend such as the rising part of the lumber and the pipe.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, in a connector 1, an inner core portion 3 for inserting and fixing a commonly used hot and cold water supply plastic pipe p on one surface side of a collar portion 2 supports a guide plastic pipe described later on the other surface side. Is a metal-made unitary body in which convex portions 4 for
The outer diameter of the collar portion 2 is equal to or smaller than the outer diameter of the hot and cold water supply plastic pipe p, and the convex portion 4 of the collar portion 2 is formed.
The peripheral edge 2a on the side has a gentle curved surface shape from the surface through which a sheath tube (not shown) can pass.

The outer peripheral surface of the inner core portion 3 is formed into an inclined surface having a gradually increasing diameter toward the collar portion 2, and
A screw screw 3a is engraved on the peripheral surface of the plastic pipe p for supplying hot water so that the tip of the plastic pipe p can be inserted and fixed. The outer diameter of the convex portion 4 is smaller than the inner diameter of the guide plastic pipe 5 inserted therein, and the convex portion 4
A core wire (single wire or twisted wire) 6 penetrates through the guide plastic pipe 5 having one end 5a inserted therein and the inner core portion 3.

The convex portion 4 and the core wire 6 have a function of linearly supporting the guide plastic pipe 5, and the tip portion 3b of the inner core portion 3 of the connector 1 and the tip of the guide plastic pipe 5 are provided. Stoppers 6a and 6b are provided at both ends of the core wire 6 protruding from the portion 5b, respectively, whereby the connector 1 and the guiding plastic pipe 5 are connected to each other to form a conduit tool for double piping. There is.

In the above structure, the guide plastic pipe 5 is made of, for example, cross-linked low density polyethylene, the outer diameter of which is less than the outer diameter of the hot and cold water supply plastic pipe p, and bending when the core wire 6 is inserted. 0.5-80% of the bending rigidity of the plastic pipe p for hot and cold water supply,
In particular, it is preferable to set it in the range of 10 to 50% from the viewpoint of ductility, and its length is about 30 to 150 cm. Therefore, the pipe resistance is maximized, so that it is preferable that the pipe has a length equal to or longer than the length immediately below.

One end 5a of the guiding plastic pipe 5 is loosely fitted to the convex portion 4 and the two members can freely rotate with respect to each other. It is preferable from the viewpoint of the operation of inserting and fixing it in No. 3. In addition, the retainer 6a in the illustrated embodiment,
6b is formed in a loop shape by bending both ends of the core wire 6, and the size of the loop-shaped portion needs to be larger than the inner diameter of the guide plastic pipe 5 side. It may be at least as large as the outer diameter.

In the figure, 1a is a through hole formed in the connector 1 for inserting the core wire 6, and 7 is a retainer 6
It is a crimp terminal crimped to the portions near both ends of the core wire 6 to provide a and 6b.

[0015]

As described above, according to the present invention, since the guide plastic pipe and the connector are connected through the core wire, the guide plastic pipe having a required length can be smoothly passed as a guide. As a conduit tool for one person's work by pushing, it exhibits shock-absorbing properties with the sheath tube, prevents damage to the inside surface of the sheath tube despite the presence of a core wire, and improves the ductility further. Is extremely effective.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention with an intermediate portion omitted.

FIG. 2 is a perspective view showing a part of a hot and cold water supply plastic pipe for explaining a conventional pipe passing operation by pushing.

FIG. 3 is a side view showing a part of a hot and cold water supply plastic pipe and a pulling metal fitting for explaining a conventional pipe work by pushing and pulling.

[Explanation of symbols]

1 is a connector 2 is the collar 3 is the inner core part 3b is the tip 4 is a convex part 5 is a guide plastic pipe 5b is the tip 6 is a core wire 6a and 6b do not come off p is a plastic pipe for hot water supply

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Claims (2)

(57) [Claims] 1. An inner core part for inserting and fixing a hot and cold water supply plastic pipe on one side of the flange part, and a convex part for supporting a plastic pipe for guide described later on the other side in series. A connector, a guide plastic pipe inserted into the protrusion, and a guide plastic pipe penetrating from the tip of the inner core portion of the connector to the tip of the guide plastic pipe, and by providing retaining means at both ends, A conduit tool for double piping, comprising a core wire connecting a connector and a guiding plastic pipe. 2. The retainer is formed in a loop shape by curving both end portions of a core wire protruding from the inner core portion of the connector and the respective tip portions of the guiding plastic pipes. Item 2. A conduit tool for double piping according to item 1.