JPH043547Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a protection tube for rising cables that protects cables rising from utility poles and the like.

Currently, transformers are installed on nearly half of all utility poles, making the installation of the poles complicated, and installation work for rising cables in these areas must be done around the transformers, which is difficult. Extremely.

By the way, when a cable is erected and attached to a utility pole with a complicated structure, a protective tube is appropriately used to protect the cable, but conventionally, a hard half-split tube made of resin has been used. This resulted in the following drawbacks.

First of all, currently available rigid tubes have a fixed length, and to adjust the length the tube must be cut, making it cumbersome to reconfigure the butt joints at both ends after cutting. It was hot.

Secondly, as mentioned above, it is necessary to avoid this when installing near the transformer transformer.
Existing rigid half-tubes alone have poor flexibility and cannot be used in some locations, and there is a risk of breakage even if they are forcibly bent.

Third, since it is a half-split tube, if it were installed floating in the air, the cable that should be protected would be exposed, which would be useless.

Fourthly, because the joints of conventional rigid tubes have a so-called butt structure, the joints could become displaced due to vibrations, impacts, and the like.

This idea was made in view of the above-mentioned drawbacks of existing protection pipes, and its purpose is to provide flexible pipes and straight pipes with ingenious connections. To provide a protection tube for a rising cable that enables a natural cable meandering, strong connection between tubes, and stable and firm fixation to a utility pole.

Hereinafter, one embodiment of this invention will be explained with reference to the drawings. Figs. 1 to 3 are respectively a plan view of a straight pipe 1;
These are a cross-sectional view taken along the line A-A' and a right side view, and as is clear from the figures, the straight pipe 1 is approximately tunnel-shaped.
As shown in the figure, the outer periphery of one end of the straight pipe 1 rises so that the cross section becomes a semicircular arc shape, and the surface thereof is curved outward in a convex manner. This constitutes a protruding joint portion 1a. The outer periphery of the other end also rises to have a substantially c-shaped cross section as shown in the figure, creating a housing 1b having a substantially c-shaped cross section on the inside.

The shape of this housing 1b is the same as the above-mentioned joint part 1a, and is slightly larger, so that the joint part 1a can be accommodated therein. Note that 1a' is a hole on the side of the joint 1a, and 1b' is an insertion port on the side of the housing 1b, and the diameter of the insertion port 1b' is smaller than the maximum diameter of the joint 1a. 1c is a substantially tunnel-shaped pipe section, and holes 2 for stainless steel bands are provided at appropriate locations.
3 is drilled.

4 to 7 are a plan view, a sectional view taken along the line A-A', a right side view, and an end view taken along the line B-B' of the flexible tube component 4, and as is clear from these figures, the flexible tube component 4 is The tube component 4 has a generally half-tube shape. The outer periphery of one end of the flexible tube component 4 is raised to have a semicircular arc shape in cross section as shown in the figure, and the surface thereof is curved convexly outward to form a protruding joint portion 4a. Note that this joint portion 4a is the same as the housing 1b described above.
The joint part 4a and the housing 1b are concentric circles when viewed from the side.
On the other hand, the other end is also molded so that its outer periphery has a substantially c-shaped cross section as shown in the figure, thereby creating a housing 4b inside. The shape and size of this housing 4b are such that the aforementioned joint portion 4a is just accommodated therein. Further, reference numeral 4c is a half-tube section, and square holes 5 and 6 for tightening are bored at appropriate locations in the tube section 4c, and parallel holes 5 and 6 of the same size and shape are provided on the bottom surface of the tube section 4c. The protrusions 7 and 8, each having a width half the width of the bottom, are provided along the inside of the bottom for the protrusion 7 and along the outside of the bottom for the protrusion 8.

As shown in FIG. 8, two flexible tube constituent members 4 are prepared, their protrusions 7 and 8 are brought into close contact with and joined to each other, and each is bored. Pass the stainless steel band 9 through the holes 5 and 6,
It extends around the outer periphery and forms one flexible tube. Note that 10 is a suitable tightening device.

The riser cable protection tube according to the embodiment having the above structure is used as shown in FIGS. 9 and 10. That is, first, the straight pipe 1 is placed over the cable 11 extending from the steel pipe 10. At that time, the hole 1 in the joint 1a of the straight pipe 1
Insert one end of the steel pipe 10 into a'.

Thereafter, straight pipes 1 are added to an appropriate length by fitting the joint portions 1a into the housings 1b of other straight pipes 1. After this, we will move on to the configuration of the flexible tube and additions. In this case, cable 1
1 is sandwiched between the respective tube portions 4b of the two flexible tube constituent members 4 to construct a flexible tube as shown in FIG.
Add pieces one after another, sandwiching the letter a. After that, the cable 11 which was installed by delivering the joint part 4a of the flexible pipe to the housing 1b of the straight pipe 1
Finished installing the protective tube on the In addition, each of the steel pipes 10,
The straight pipe 1 and the flexible pipe 4 are fixed to the utility pole 12 by the first
As shown in Figures A and B, the stainless steel band 13
It is done by In this case, the steel pipe 10, the flexible pipe 4
If a hole is drilled in the straight pipe 1, it can be firmly fixed.

As described above, in the riser cable protection tube according to this invention, in terms of the configuration of the connection part between the flexible tubes, the joint part with a semicircular arc cross section and an outwardly curved surface is located inside the housing. Since the connecting portion is held within a certain range and the material thereof has appropriate elasticity, the connecting portion can freely pivot within a certain range. In addition, it is obvious that the connection part with such a structure does not shift as compared to the connection part based on the butt structure of conventional protection tubes.

Similarly, the connecting portion between the straight pipes is rotatable because the joint portion, which has a semicircular arc cross section and whose surface is curved outwardly, is housed in the housing.

Since the straight pipe housing is formed so as to accommodate the joint part of the flexible pipe, the connecting part between the straight pipe and the flexible pipe is also pivotable.

As a result, by combining straight pipes and flexible pipes, cables can be raised up on utility poles efficiently and without waste while being protected. That is,
As shown in Figure 10 of the attached drawing, where there is no need to detour, only straight pipes are added to cover the cables for protection, and various equipment such as transformers are detoured by approaching above the utility poles. If necessary, you can switch to flexible pipes and add more.

In addition, since the straight pipe itself is approximately tunnel-shaped, it can be fixed with its longitudinal end face in close contact with a utility pole. By locking the band into a hole drilled in the tube and wrapping it around the outside of the utility pole, a strong fixation can be achieved.

The weight of the upper protection tube is also placed on the lower protection tube of the utility pole, but since it can be tightly fixed in that way, stable fixation can be achieved without wobbling.

Furthermore, since the flexible tube is made up of two half-split flexible tube components to form one tube body, the cable will not be exposed even if it is floated inside and attached to a telephone pole as in the past. In addition, in this case, since the appropriate band body is inserted into the hole drilled in each flexible tube component and passed around the outer periphery to form the tube body, each flexible tube component does not shift and the flexible tube is firmly secured. It consists of

In addition, the exterior is simple, contributing to the beautification of the city in these days when there are so many intricately decorated pillars.

[Brief explanation of the drawing]

Each figure is a figure about an example, and Figures 1 to 3 are a plan view of a straight pipe, a sectional view taken along the line A-A', and
The right side view, Figures 4 to 7 are respectively plan views of the flexible tube, sectional view taken along the line A-A', right side view, and end view taken along the line B-B', and Figure 8 shows the tightening status of the flexible tube. The longitudinal end view and FIGS. 9 and 10 A and B are explanatory diagrams showing the state of attachment to a telephone pole. In the figure, 1 is a straight pipe, 1a is a joint, 1b is a housing, 1c is a pipe, 2 and 3 are holes, 4 is a flexible pipe component, 4a is a joint, 4b is a housing, and 4c is a pipe. 5 and 6 are square holes, 9 and 13 are stainless steel bands, 11 is a cable, and 12 is a utility pole.

Claims (1)

[Scope of utility model registration request] It consists of a combination of a straight pipe and a flexible pipe, and the straight pipe is approximately tunnel-shaped, and a hole is bored on the outer periphery of the pipe for securing it to a utility pole with an appropriate band. One end constitutes a joint portion whose cross section is raised to have a semicircular arc shape and whose surface is curved outward in a convex manner, and the other end portion is a housing having a shape and size in which the joint portion is housed. is formed,
On the other hand, a flexible tube is constructed by abutting half-tube-shaped flexible tube components with appropriate elasticity, inserting an appropriate band body into a hole drilled in each flexible tube component, and passing it around the outer periphery to form a tube body. Furthermore, this flexible tube component constitutes a joint part whose one end is raised in a semicircular arc shape in cross section and whose surface is curved convexly outward, and the other end has a shape and size that allows this joint part to fit inside. 1. A protection tube for a rising cable, characterized in that the straight tube housing is formed so as to be able to receive a joint portion of a flexible tube.