JPH094769A - Plastic pipe for connection - Google Patents

Abstract

PURPOSE: To reliably interconnect plastic pipes even when a distance between two ends is a little longer or shorter than a predetermined size, to have excellent pressure resistance and heat resistance, and to dissolve a problem on a smell and increase of a cost by providing a curve part deviated from the same axis and semirigidity and flexibility on a whole, and be used for feed water and feed hot water. CONSTITUTION: A plastic pipe 1 for connection has an arcuate curve part 2 deviated leftward from the same axis X and is semirigid and has flexibility on a whole. Rounding of an inner curve of the curve part 2 is L/4 or less. Couplings 4 are previously attached to two end parts of a straight line part 3 on the same axis X. A plastic pipe 1 for connection is located within a distance L between the ends of couplings 21 of a faucet 10 for a water line and feed water pipe 20. A distance A between two ends of the couplings 4 is longer than the distance L and by shortening it by an amount equivalent to a distance (a), the distance is reduced to a value equal to the distance L. The linear distance A between the two ends of the plastic pipe 1 for connection which is manufactured and to which the couplings 4 are previously attached is adjustable in the direction of an arrow mark 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting plastic pipe suitable for connecting an existing water faucet and an end of a water supply pipe installed near the water faucet.

[0002]

2. Description of the Related Art As conventional connecting pipes of this type, metal pipes and plastic pipes have been generally used. A normal metal pipe is prepared by cutting a straight pipe into a predetermined length in advance, and is connected to the faucet and the water supply pipe by using a joint.
If the connection pipe is not cut in accordance with the gap between the faucet and the water supply pipe, the connection becomes difficult or impossible. A rigid straight pipe, even a plastic pipe, had the same drawbacks as the above-mentioned metal pipe. Therefore, when the connection distance is not short, that is, when the connection length is not exactly accurate but slightly longer than that, a metal bellows tube, a soft plastic tube, and a reinforcing hose are used as connection tubes.

[0003]

With the metal bellows tube, it is possible to connect even if it is a little longer than the exact length according to the connection distance, but it is not flexible enough. There was a possibility of water leakage due to poor connection. Also, if it is a soft plastic pipe, it can be connected even if it is a little longer than the expected exact length, but there is a problem in terms of pressure resistance and heat resistance, and if it is considerably longer than the correct length, soft plastic pipe The flexibility of the pipe cannot cope with it and makes connection difficult. The reinforcing hose reinforced with a fiber or wire having a plastic or rubber lining has extremely high flexibility and pressure resistance, and can be connected when the length is longer than the expected length, but the above-mentioned ones. Similarly, if the length between both ends is shorter than the planned length, it cannot be connected because it does not extend, and there are problems of odor and cost.

Therefore, the present invention is particularly effective when used for connection distances of 2 m or less, and it is possible to connect even if the length between both ends is slightly longer or shorter than the planned length, and it is possible to achieve reliable connection. It is an object of the present invention to provide a plastic pipe for connection, which can be connected to a pipe, has excellent pressure resistance and heat resistance, and does not have a problem of odor or cost increase.

[0005]

In order to achieve the above-mentioned object, the present invention provides a semi-rigid and generally flexible water supply, hot water supply, etc., which has a bent portion deviated from the same axis. Is used.

[0006]

Operation: When both ends are straight parts located on the same axis and the middle part is formed in an arc-shaped bent part deviated from the same axis, both ends can be pulled by the flexibility of the material itself and the existence of the bent parts. The linear distance between the two extends, and if you press both ends toward each other, the linear distance between both ends will become shorter. Also,
Both ends can be offset from the same axis to the left and right. Therefore, it is possible to connect even if the linear length between both ends or the connection portion of the target pipe, for example, the position of the faucet and the water supply pipe are incorrect.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

The embodiment shown in FIG. 1 is an existing water faucet 1
0 shows an example in which a water supply pipe 20 installed near the faucet 10 is connected, and the plastic pipe 1 for connection is an arc shape shifted from the same axis X to the left in the drawing. It has a bent portion 2 and is semi-rigid and has flexibility as a whole. R of the curved portion inside the bent portion 2 is L / 4
It is the following. Joints 4 are previously attached to both ends of the straight line portion 3 on the same axis X. A material such as polybutene or polyethylene can be preferably used for the connecting plastic tube 1.
The connecting plastic pipe 1 is connected in a distance L between the tap 10 and the end of the joint 21 of the water supply pipe 20.

FIG. 2 shows the connecting plastic pipe 1 before connecting to the portion of this distance L, and the distance A between both ends of the joint 4 is longer than the distance L shown in FIG. Distance a in FIG.
When it is reduced by the amount, the distance becomes L (A−a = L). The linear distance A between both ends of the connecting plastic tube 1 which is manufactured and to which the joint 4 is pre-mounted is adjustable in the direction of the arrow in the figure. It can also be adjusted in the direction of the arrow in the figure. Further, the R of the curved portion inside the curved portion 2 in this state is also A / 4 or less.

FIG. 3 shows a water faucet 10 and a water supply pipe 20.
When the joint 21 and the joint 21 are not installed on the same axis, the connecting plastic pipe 1 is connected between them. In this example, the connecting plastic tube 1 is adjusted in the direction of the arrow in FIG.

The embodiment shown in FIG. 4 shows an example in which the connecting plastic pipe 1 is connected when the water faucet 10 and the water supply pipe 20 are displaced axially and horizontally. Is. In this example, the arrow in FIG.
Adjust the connecting plastic tube 1 in both directions.

The embodiment shown in FIG. 5 shows an example in which the water supply pipes 20 are connected by the connecting plastic pipe 1.

The embodiment shown in FIG. 6 shows that the curved portion 2 deviated from the same axis X is formed into a circle instead of the arc shape as in the above-mentioned embodiment, and as shown in FIG. The downwardly extending tube is displaced laterally from its axis to form a circle, and returns to the axis again to extend downward. In this embodiment, the joint 4 is not attached in advance.

Each of the embodiments is a hollow plastic tube having a circular cross section. Although the bent portion 2 exists in a part of the length direction, it may exist in the entire length. Bend 2
Contributes to the flexibility, and the distance, direction, and position of the tube end can be easily changed. In addition, although the connection plastic pipe 1 for water supply is used in any of the embodiments, it is needless to say that it may be used for hot water supply or for other fluids. Especially, it is suitable for connection of 2 m or less,
In the case of a faucet, the length of the pipe can be manufactured in advance at a factory, and a joint and a faucet can be connected to the end of the pipe before shipment.

[0015]

As described above, according to the present invention, since there is a bent portion deviated from the same axis line and it is semi-rigid and totally flexible, the linear distance between both ends can be reduced. It can be expanded and contracted, and it can be reliably connected even if the length of the connecting plastic tube is longer or shorter than the planned distance between the connections. Further, not only expansion and contraction in the axial direction but also displacement in the lateral direction can be adjusted. Further, since an unreasonable force is unlikely to be generated at the connection point, the faucet, the joint and the like are less likely to be damaged. Furthermore, since it is easy to adjust the axial direction and the lateral direction at the site, the construction at the site is easy.

[Brief description of drawings]

FIG. 1 is a side view showing a preferred embodiment of the present invention.

FIG. 2 is a side view showing only a connecting plastic pipe with a joint.

FIG. 3 is a side view showing an example of attachment when the attachment points are not on the same axis.

FIG. 4 is a side view in which the mounting points are displaced in the axial direction and are also displaced in the horizontal direction.

FIG. 5 is a side view showing an example in which water supply pipes are connected to each other.

FIG. 6 is a side view showing an example in which a curved portion is a circle.

FIG. 7 is a front view of FIG. 6;

[Explanation of symbols]

 1 plastic pipe for connection 2 bend

Claims (1)

[Claims] 1. A bent portion deviated from the same axis,
Semi-rigid and flexible plastic pipe for connection used for water supply, hot water supply, etc.