JPH0644268Y2 - Curved pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a curved pipe line, and more particularly to a curved pipe line formed by a pipe having a partition wall inside such as a protective pipe for wiring.

[Conventional technology]

Conventionally, when using underground cables such as communication cables,
As shown in FIGS. 2A and 2B, a wiring protection tube B whose inside is partitioned into several compartments by a partition wall A is used, and a cable C is housed and wired in the compartments. .

[Problems of the prior art] By the way, in pipe laying, it is often necessary to bend the pipe line, but in the case of a protective pipe for wiring, the curvature of the pipe line becomes There is a restriction on the radius. For example, in the case of laying a communication cable, the radius of curvature is 2.5 m or more due to the distance between manholes and the curve intersection angle, and for power cables, the radius of curvature is 5 m or more.

However, since a curved pipe having such a radius of curvature has a partition wall in the shape of a letter or a cross in the interior of the pipe, it is extremely difficult to perform integral molding or secondary processing molding, and it is difficult to mold a long curved pipe. There was a problem that it could not be put to practical use and therefore there was no suitable means for laying a smooth curved conduit.

However, as disclosed in Japanese Utility Model Laid-Open No. 49-150694, the end face of a short straight pipe having a socket and a mouth is formed obliquely with respect to the axis, and these short straight pipes are sequentially connected. Although it has been proposed to form a curved pipe line by approximation, according to this method, both the line length of the short straight pipe and the angle at which the insertion end is formed obliquely are adjusted, Since it is necessary to form a curved pipe line that approximates the target radius of curvature and curve length, a short straight pipe corresponding to the target radius of curvature and curve length must be specially manufactured for each curved pipe line. Since it is quite troublesome to cut the end obliquely in consideration of the positional relationship with the internal partition wall, it takes a lot of days to manufacture, and there is a problem that it is difficult to carry out from a practical point of view.

[Problems solved by the invention]

The present invention has been made in view of the above problems, and an object thereof is to provide a smooth curved conduit having a large radius of curvature that can be easily implemented.

[Technology for solving problems]

That is, the curved pipe path of the present invention is characterized in that a preformed short curved pipe having a partition wall inside and a straight pipe of an arbitrary length having a partition wall inside are mixed and connected. It is a thing.

〔Example〕

 Next, this invention will be described with reference to examples.

FIG. 1 is a plan view of an embodiment of this invention.

The curved pipe line 1 of the present invention is a pre-formed short curved pipe 2 having a partition wall A with a radius of curvature R and a partition wall A inside.
It is configured by mixing and connecting a straight pipe 3 having an arbitrary length.

In the above embodiment, the short curved pipe 2 having a radius of curvature R is, for example, a radius of curvature of 2.5 m or 5 m depending on the type of the cable inserted therein, and its length is equal to the pipe diameter and is at most twice as long. On the other hand, the straight pipe 3 having an arbitrary length is used.

In addition, as shown in the figure, the mode of the mixed connection is such that the short curved pipe 2 and the straight pipe 3 of an arbitrary length are appropriately combined and connected so as to approximately follow the circumference of the desired radius of curvature R'in the pipeline. To be done.

[Action]

In the case of an internal partition tube, the more complicated the shape of the internal partition wall, the more difficult it becomes to form a curved tube, and in the case of a long curved tube, the molding is almost impossible.

However, even with internal partitioning, injection molding is possible if the pipe axial length is equal to or at most about twice that of the pipe diameter.

Therefore, instead of molding a long curved pipe from the beginning to the end of the curved pipe, prepare a large number of short curved pipes with a fixed curvature, and combine this with a straight pipe of an arbitrary length. As a result, a curved pipe path having a desired radius of curvature is obtained.

Also, since the pipe ends of the short curved pipe and the straight pipe of any length can be formed at right angles to the pipe axis, they can be specially manufactured according to the desired radius of curvature and curve length. There is no need, and connection work becomes easy.

〔effect〕

Since the present invention is configured as described above, for pipes with various radii of curvature, if only a short curved pipe with a minimum radius of curvature of one kind is prepared, it becomes a straight pipe of arbitrary length. By combining them, it is possible to easily lay a curved pipe line that approximates the desired radius of curvature, and it is not necessary to cut the pipe end at an angle to the pipe axis when laying, so consider the correlation with the partition wall. There is no need to manufacture a special short tube that requires a troublesome cutting work, and it has a practical effect that it is easy to carry out.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 (a),
(B) is an explanatory view of a conventional example.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Kuratani 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Atsushi Matsuda 1-1-6 Uchisai-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Takehiro Ito 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Vinyl Pipe Factory (72) Inventor Yoshio Kato 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. Company vinyl pipe factory (72) Inventor Yuji Sakuma 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Vinyl pipe factory (72) Ryohei Suga 64, Ishizukita-machi, Sakai City, Osaka Kubota Iron Works Co., Ltd. Vinyl Inside the pipe factory (72) Inventor Masakazu Nishimura 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. Vinyl Inside the pipe factory (56) References: Actually open 50-81392 (JP, U) Actually open 49-150694 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A curved pipe line formed by mixing and connecting a preformed short curved pipe having a partition wall inside and a straight pipe of an arbitrary length having a partition wall inside.