JPS6110070Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a multi-tube spiral pipe used for transporting various fluids, particularly a pipe used when expansion and contraction movements are required.

For example, when transporting liquids or air, it is necessary to allow the movement of equipment connected by pipes, or to allow the movement of manually operated equipment, so multiple flexible pipes are twisted together. The use of a multi-tube spiral pipe in which the multi-tube pipes are combined into a multi-tube pipe and is spirally wound in the same direction as the twisting direction to provide elasticity is being considered.

By the way, in a multi-tube spiral pipe, if the twisting direction of the pipe and the spiral direction are the same, the twisting will become tighter when it is stretched, and the force for stretching will be concentrated in the twisting direction, so the stretching will be difficult. requires great force.

This applies unnecessary force to the equipment connected to the pipe, making it difficult to operate smoothly, and in the case of manual work, the degree of fatigue increases due to expansion and contraction.

Furthermore, since force is concentrated in the twisting direction during stretching, the pipe tends to collapse, and when fluid is flowing through the pipe, there is a problem in that the flow rate changes.

This idea was made to solve the problems mentioned above, and it is a multi-tube spiral that requires less force for stretching, allows for smooth movement of the device and manual work, and does not change the transport flow rate. The purpose is to provide shaped pipes.

The structure of this invention is to form a multitubular pipe by twisting multiple flexible pipes together, wind the multitubular pipe in a spiral in the opposite direction to the twisting direction, and shape the spiral shape by heat setting. Alternatively, after winding this multitubular pipe in a spiral in the same direction as the twisting direction and heat-setting the spiral shape, the spiral direction is reversed so that the force when stretched is applied in the opposite direction to the direction in which the pipes gather. This is what I did.

An embodiment of this invention will be described below with reference to the accompanying drawings.

As shown in the figure, a plurality of flexible pipes 1 are collected, and this group of pipes is twisted together to form a multi-pipe pipe 2.
is formed.

The above-mentioned pipe 1 is formed using thermoplastic plastic or rubber, and the number of twisted pieces is not just three as shown in the figure, but can be increased or decreased as long as it is two or more, and the inner diameter of the pipe 1 used can be changed. The size of the pipes may be arbitrarily selected, and in the combination of pipes, not only pipes of the same diameter but also pipes with a large diameter and pipes with a small diameter may be combined.

Further, the multi-tube pipe 2 may be provided with a sheath 3 made of thermoplastic plastic or rubber, as shown in FIGS. 3 and 4.

As shown in FIGS. 2 and 4, the multitubular pipe 2 is wound spirally in the direction opposite to the twisting direction of the pipe 1, and the pipe 1 or sheath 3 is heat set to form a spiral shape. A spiral pipe 4 is formed.

In the illustrated case, the burning direction of the multitubular pipe 2 is to the right and the helical direction is to the left, but the twisting direction and the helical direction may be set opposite to that shown in the figure.

The multi-tube spiral pipe of this invention has the above-mentioned structure and is used as a fluid supply pipe for parts that require expansion and contraction in the supply of various fluids. It acts in the opposite direction to the twisting direction, and the twist of the pipe group 1 is brought to a state where it is just untwisted, so that the force required for stretching is small, and since the pipe 1 is not crushed, no change in flow rate occurs.

Furthermore, when the stretching force is released, the material automatically shrinks and restores its shape by heating into a spiral shape.

As mentioned above, the multi-tubular spiral pipe according to this invention maintains a spiral shape in the opposite direction to the twisting direction, so the force required when stretching it is small.
No unnecessary force is applied to the device connected to the pipe, smooth movement can be obtained, and the degree of fatigue when operating the device manually can be reduced.

Furthermore, since the stretching force acts in the direction of untwisting the pipe, the pipe will not collapse, and when used for transporting fluid, there will be no fluctuation in flow rate due to expansion and contraction.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a first example of the spiral pipe according to the invention, Fig. 2 is a front view of the same, Fig. 3 is a sectional view showing a second example of the same, and Fig. 4 is a sectional view of the same. FIG. 1...Pipe, 2...Multi-tube pipe, 3...Sheath, 4...Multi-tube spiral pipe.

Claims (1)

[Scope of utility model registration request] A multitubular pipe made by twisting together multiple pipes made of flexible material, which is spirally wound in the opposite direction to the twisting direction of the pipes, and can be expanded and contracted by heat setting into a spiral shape. Multi-tubular spiral pipe.