JP3030599U - Plastic tube - Google Patents

Abstract

(57) [Summary] [Problem] Since a conventional plastic pipe is simply formed into a cylindrical shape, its radial rigidity is weak and its bending strength is also weak. A reinforcing piece (5) is integrally formed on the inner surface of a plastic pipe body (1) over the entire length of the pipe body (1), whereby the radial rigidity and bending strength can be increased.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a plastic pipe used as, for example, a clothesline, a pole, and other general-purpose rods.

[0002]

[Prior art]

 FIG. 5 shows a conventional general plastic pipe 101. The plastic pipe 101 is simply formed into a hollow cylinder by drawing. The plastic pipe 101 of this type is used as a clothesline Z, as shown in FIG. 6, for example, or is commonly used as a pillar or various rods.

By the way, when the plastic pipe 101 of FIG. 5 is used as a clothesline Z, for example, as shown in FIG. 6, the length is about 3 to 4 m, and the clothesline Z has a comparison like a futon. A heavy object may be hung.

[0004]

[Problems to be solved by the device]

 However, since the conventional plastic pipe 101 shown in FIG. 5 is simply formed into a hollow cylindrical shape, it has a problem that the radial rigidity is relatively small and the bending strength is relatively weak. In particular, when this plastic pipe 101 is used as a clothesline Z as shown in FIG. 6, for example, a long length (for example, 3 to 4 m) is used. There was a problem that even when the clothes were hung on, the clothesline would bend downward as indicated by symbol Z ', and the limit strength would be small. Incidentally, this type of plastic pipe is generally used as a pillar or a bar material for other purposes in addition to a clothesline, and it is desired to improve radial rigidity and flexural strength also in the usage form thereof.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a plastic pipe capable of enhancing radial rigidity and bending strength. Is.

[0006]

[Means for Solving the Problems]

 The present invention has the following configuration as means for solving the above problems. That is, the plastic pipe of the present invention is constructed by integrally molding a reinforcing piece on the inner surface of the plastic pipe main body over the entire length of the plastic pipe main body.

As the plastic raw material for producing the pipe, various conventionally used raw materials (for example, vinyl chloride) can be adopted. Further, the thickness of the pipe, the wall thickness of the pipe, the length of the pipe and the like can be appropriately set according to the application.

The number of reinforcing pieces on the inner surface of the tube body may be one, or a plurality of pieces (for example, about eight) may be formed on the inner peripheral surface of the tube at appropriate intervals. Also, this reinforcing piece has a width that extends over the entire length of the inner diameter of the pipe (in this case, each reinforcing piece extends radially from the center of the pipe to reach the inner surface of the pipe), or from the inner surface of the pipe toward the center of the pipe as appropriate. It is possible to employ an appropriate form such as one that is projected only by the width or a lattice shape. It should be noted that this reinforcing piece is simultaneously formed by pultrusion molding when the tube body is manufactured.

[0009]

[Embodiment of device]

A preferred embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 shows the plastic pipe X ₁ of the first embodiment of the present invention, and FIG. 2 shows the plastic pipe of the second embodiment of the present invention. The tube X ₂ is shown respectively. Also shows further plastic tube X ₃ to X ₅ each of the other implementation form (third to fifth embodiments) in (A) ~ (C) of FIG. Further, FIG. 4 shows an example of use when the plastic pipes of FIGS. 1 to 3 are used as a clothesline.

In each of the first to fifth embodiments, as a raw material for the plastic tubes X _{1 to} X ₅ , an appropriate plastic raw material (for example, vinyl chloride) that has been generally used in the past can be used. Further, the diameter of the pipe, the thickness of the pipe wall, the length of the pipe, etc. are appropriately set according to the application.

Further, the plastic pipes X _{1 to} X ₅ of the respective embodiments are provided with a plurality of reinforcing pieces 5, 5 ... For reinforcing the pipe body 1 on the inner surface of the plastic pipe body 1. The main body 1 is integrally formed over the entire length.

The plastic pipe X ₁ of the first embodiment shown in FIG. 1 has a total of eight reinforcing pieces 5, 5, ..., And each reinforcing piece 5, 5. Is extended toward the center of the pipe. In other words, in the first embodiment, a total of eight reinforcing pieces 5, 5, ... Are integrally formed in a state of radially extending from the center of the pipe to the inner surface of the pipe at an angle of 45 °. .. are formed in a plate shape, and the plate thickness may be about 1 to 2 mm if the tube diameter is about 30 to 40 mm, although it depends on the diameter of the tube. .

In the plastic pipe X ₁ of the first embodiment, the two reinforcing pieces 5 and 5 facing each other over the entire length of the inner diameter of the pipe are continuous, and the reinforcing pieces 5 and 5 are arranged at an angle of 45 ° at a total of 8 places. The strength in the bending direction can be increased and the rigidity in the radial direction of the pipe (rigidity against the compressive force in the radial direction) can be significantly increased.

The plastic pipe X ₂ of the second embodiment shown in FIG. 2 has a total of eight reinforcing pieces 5, 5 ... As in the first embodiment. The protrusion is made from the inner surface of the tube toward the center of the tube by an appropriate width (for example, 1/2 to 1/3 of the distance from the inner surface of the tube to the center of the tube). Therefore, in the case of the second embodiment, the tube center portion is hollow.

In the plastic pipe X ₂ of the second embodiment, the flexural strength and the radial rigidity are slightly lower than those of the first embodiment, but the width of each reinforcing piece 5 is shorter than that of the first embodiment. Less material and lighter weight than

Further, in the present invention, the reinforcing piece 5 can be molded as in the third to fifth embodiments shown in FIGS. 3 (A) to 3 (C).

The plastic tubes X _{1 to} X ₅ shown in FIGS. 1, 2 or 3A to 3C can be used as a clothesline Y, for example, as shown in FIG. In the usage pattern shown in FIG. 4, for example, a plastic pipe having a length of about 3 to 4 m is used. When the clothes rod Y is used as described above, a heavy object such as a futon may be hung on the clothes rod, but even in that case, the plastic pipe (clothes rod Y) has a large bending strength. It does not bend so much downward.

In another embodiment of the present application, the number of the reinforcing pieces 5 formed on the inner surface of the pipe body 1 may be at least one, but is preferably three or more. In that case, it is preferable to form the reinforcing pieces at equal angular intervals. As the application of the plastic tube (X ₁ ~X _5), in addition to use as the laundry pole, it can be used as a bar strut and other general purpose is a matter of course.

[0019]

[Effect of device]

 According to the plastic pipe of the present invention, since the reinforcing piece 5 for reinforcement is integrally formed on the inner surface of the pipe body 1, the radial rigidity and the bending strength of the pipe body 1 can be increased, and The effect is to provide a strong plastic tube.

[Brief description of drawings]

FIG. 1 is a perspective view of a plastic pipe according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a plastic pipe according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a plastic pipe according to third to fifth embodiments of the present invention.

FIG. 4 is an explanatory view of the use of the plastic pipe of FIGS.

FIG. 5 is a perspective view of a conventional plastic tube.

FIG. 6 is a view for explaining the use of the plastic pipe of FIG.

[Explanation of symbols]

 Reference numeral 1 is a tube body, and 5 is a reinforcing piece.

Claims (1)

[Scope of utility model registration request] 1. A plastic pipe characterized in that a reinforcing piece (5) is integrally formed on the inner surface of the plastic pipe body (1) over the entire length of the pipe body (1).