JP4916210B2 - Electric pole rising protection pipe - Google Patents

Description

  The present invention relates to a utility pole rising protection tube for protecting a cable rising portion when a cable embedded in the ground such as a power cable and a communication cable is set up on the ground and attached to a utility pole.

  When a cable buried in the ground is raised to the ground along the utility pole, the utility pole riser protection pipe is installed on the ground rise portion of the cable, that is, at a height that can be easily touched by humans, for various safety reasons. To protect. The general procedure for starting up the cable will be described. As shown in FIG. 6, the cable 2 accommodated in the underground pipe 1 is, for example, an arc-shaped tube made up of a plurality of arc-shaped flexible split steel tubes 3b connected by joints 3a. The cable 2 is raised to the ground through a road 3, and a steel rising protection pipe (so-called rising steel pipe) 4 having a circular cross section is put on the rising part of the cable 2 on the ground.

  The rising protective pipe 4 is, for example, used by connecting two 3.5 m steel pipes to a length of 7.0 m, and connecting the rising protective pipe 4 and the arcuate pipe line 3 with a joint 5. 4 along the side of the utility pole 6 with the lower part of the earth 4 buried in the ground, and further, the rising protection pipe 4 is circulated at an appropriate interval with respect to the utility pole 6 by using the metal free band 7, Generally, the ends are fastened with bolts and nuts (Patent Documents 1 and 2).

JP 2005-65445 A Japanese Unexamined Patent Publication No. 7-75240

  By the way, the conventional rising protection pipe 4 is intended to protect the cable 2 due to automobile collision, but if the collision force is large, damage (dent) occurs and the internal cable 2 is compressed. There is a risk of damage. In this case, since the cable 2 is covered with the rising protection pipe 4, the damage state cannot be visually confirmed.

  Alternatively, whether or not the cable 2 is damaged can be grasped by a continuity test or the like, so even if it is not a problem that the damage state cannot be visually confirmed, the rising that is damaged due to the loss of aesthetics. When the protective tube 4 is replaced or when the cable 2 is replaced in the future, the damaged rising protective tube 4 bites the internal cable 2 by compression, and the cable 2 is pulled out from the rising protective tube 4. There is a problem that the work is difficult.

  Therefore, in view of the above-mentioned problems, the present invention can easily confirm whether or not an internal cable is damaged when a damage (dent) occurs due to an automobile collision or the like, and can also be replaced after the damage. Alternatively, it is an object of the present invention to provide a protective pole rising protection pipe that can easily carry out the work of replacing the internal cable.

The present invention has been made to solve the above-mentioned problems, and in order to protect the cable's rising part when the cable embedded in the ground such as a power cable or a communication cable is set up on the ground and attached to the power pole. An electric pole rising protection tube with a structure in which a plurality of pipes fixed to a power pole by a flexible band are joined together, and the area where damage (dents) may occur due to automobile collision, etc. A pipe body including a severable pipe, and the severable pipe body is constituted by a pair of pipe constituent members having a shape obtained by splitting the pipe body. In order to be able to insert the upper end portion of the lower non-divided tube body and the lower end portion of the upper non-divided tube body, a female die having a diameter larger than that of the body portion excluding the lower end portion and the upper end portion is formed. Each female mold is for the side of the utility pole Jo portion is formed, both ends of the one pipe component is such that both ends of the other pipe component is insertable, together with the widened, both ends of the other pipe component is butted so that a step portion is formed by widening, further the notch formed on both side ends of the widened body part Rutotomoni, as fitted into the Ri-away該切, both sides of the body portion of the other pipe component An engaging piece is formed at the end portion so that the tongue piece protruding from the both end portions is bent outward so as to be along the outer peripheral surface of the other tube constituent member.

According to this configuration, when a tube that can be divided due to an automobile collision or the like is broken (dented), the tube is opened to easily check whether the internal cable is damaged or not. In addition, even if the damaged tube body bites the internal cable by compression, if the tube body is disassembled, the biting is inevitably eliminated, so the tube body and the internal cable Can be easily separated, and the damaged tube body can be replaced or the internal cable can be replaced.
Further, not only can the pair of tube constituent members be simply combined by simply fitting the engaging piece into the notch, but also the relative displacement of the pair of tube constituent members can be prevented. .
In addition, the separable tube can be easily divided without pulling out the upper non-divided tube and the lower non-divided tube from the separable tube. In addition, by making the lower end and the upper end of the separable tube larger in diameter, it is easy to insert and remove the upper non-division tube and the lower non-division tube relative to the separable tube. . That is, workability is very good.

  As described above, according to the present invention, when a break (dent) occurs due to an automobile collision or the like, it is possible to easily visually check whether or not the internal cable is damaged. Cable replacement work can be done easily.

  Moreover, since only a part of the rising protection pipe can be divided, the cost can be kept low.

  Hereinafter, a utility pole rising protection pipe (hereinafter simply referred to as a “rising protection pipe”) according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are assigned to the same components as those in the prior art.

<First embodiment>
As shown in FIG. 1, the rising protection pipe 10 according to the first embodiment corresponds to the lower pipe body 11 (the “lower non-divided pipe body” according to the present invention) embedded in the ground leaving at least the upper end portion. ), An intermediate tube 12 joined to the upper end of the lower tube 11 (corresponding to a “divided tube” according to the present invention), and an upper tube joined to the upper end of the intermediate tube 12 The body 13 (corresponding to the “upper non-divided tube” according to the present invention) is composed of three tubes.

  The lower tube body 11 and the upper tube body 13 are straight tubes and are circular tubes having the same or substantially the same tube diameter. On the other hand, the intermediate tube 12 is a straight tube in which a pair of tube members 12A and 12B are combined to form a tube, and the body 12c excluding the lower end 12a and the upper end 12b includes the lower tube 11 and While having the same or substantially the same tube diameter as the upper tubular body 13, the upper end portion of the lower tubular body 11 can be inserted into the lower end portion 12a, and the lower end portion of the upper tubular body 13 can be inserted into the upper end portion 12b. Each is a circular pipe in which the lower end portion 12a and the upper end portion 12b are expanded in diameter.

  The lower tubular body 11 has a length of, for example, 0.5 m in a state where the upper end portion is inserted into the lower end portion 12a of the intermediate tubular body 12, and the intermediate tubular body 12 has a length of, for example, 3.0 m. The upper tubular body 13 has a length of, for example, 3.5 m in a state where the lower end portion is inserted into the upper end portion 12b of the intermediate tubular body 12, and the three tubular bodies 11, 12, 13 The joint is used with a length of 7.0 m as before.

  And the lower end part (the lower end part of the lower pipe body 11) of this rising protection pipe 10 is connected to the underground element 5, and the lower end part (the part which left at least the upper end part of the lower pipe body 11) of the rising protection pipe 10 Is embedded in the ground along the side of the utility pole 6, and further, the rising protection pipe 10 is circulated at an appropriate interval with respect to the utility pole 6 using the metal free band 7, and the ends of the free band 7 are connected to each other. Fasten with bolts and nuts.

  Specifically, each of the tube constituent members 12A and 12B of the intermediate tube body 12 has a halved shape as shown in FIG. Further, the one pipe constituent member 12A is widened between the side end portions 12d and 12d so that the both side end portions of the other pipe constituent member 12B can be inserted between the both side end portions 12d and 12d.

  A notch 12e is formed at an appropriate position in the side end 12d of one of the tube constituent members 12A, while a side end of the other pipe constituent member 12B is located at a position corresponding to the notch 12e. Is formed with an engaging piece 12f sized to fit into the notch 12e.

  The engaging piece 12f is formed by bending a tongue piece protruding from a side end portion of the other pipe constituent member 12B outward so as to follow the outer peripheral surface of the other pipe constituent member 12B. Is located at the same radial position as the wide end portion 12d.

  Therefore, when the pair of pipe constituent members 12A and 12B are combined, the engaging piece 12f fits into the notch 12e, while the both side ends of the other pipe constituent member 12B are both side ends 12d and 12d of the one pipe constituent member 12A. The intermediate tubular body 12 is configured in a state of being abutted with the stepped portion in 12d.

  In such an intermediate tube body 12, since both side end portions of the other tube constituent member 12B are restrained by both side end portions 12d and 12d of one pipe constituent member 12A, a pair of pipe constituent members 12A and 12B. Does not cause a deviation in the radial direction. Further, since the engaging pieces 12f of the other pipe constituent member 12B are fitted into the notches 12e of the one pipe constituent member 12A, the pair of pipe constituent members 12A and 12B are also displaced in the axial direction. Does not occur.

  Therefore, as shown in FIG. 1, the intermediate tube 12 that is a feature of the first embodiment is damaged (dented) due to a car collision, and the internal cable 2 may be compressed and damaged. When the intermediate tube 12 is damaged (dented) due to an automobile collision or the like, the tube constituent members 12A and 12B are opened to easily check whether the internal cable 2 is damaged. Can be confirmed.

  Further, even if the damaged intermediate tube 12 bites the internal cable 2 due to compression, if the pipe constituent members 12A and 12B are disassembled, the biting is inevitably eliminated, so the intermediate tube 12 The internal cable 2 can be easily separated, and the damaged intermediate tube 12 can be replaced or the internal cable 2 can be easily replaced.

  In addition, since both end portions 12a and 12b of the intermediate tube body 12 are of a female type having an enlarged diameter, the lower tube body 11 and the upper tube body 13 are shifted by shifting the lower tube body 11 and the upper tube body 13 in the axial direction. Even if the tubular body 13 is not pulled out from the intermediate tubular body 12, the intermediate tubular body 12 can be easily disassembled as long as the fastening and fixing by the free band 7 to the intermediate tubular body 12 is released.

<Modification of First Embodiment>
In the first embodiment, the tongue piece protruding from the side end portion of the other tube constituting member 12B is bent outward to form the engaging piece 12f. However, in this modification, as shown in FIG. 'Is straightly extended along the tangential direction of the outer peripheral surface of the other tube constituting member 12B' without bending the tongue piece. Moreover, the engaging piece 12f ′ is formed to be somewhat long.

  Then, if a pair of pipe constituent members 12A ′ and 12B ′ are combined, the engaging piece 12f ′ fits into the notch 12e ′, and the tip side protrudes from the outer peripheral surface of the one pipe constituent member 12A ′. Become. Also with such a configuration, it is possible to prevent the pair of tube constituent members 12A 'and 12B' from being displaced in the relative radial direction and in the axial direction.

  In addition, since the engagement hole 12g is formed in the engaging piece 12f ′, if the free band 7 is hung on the engaging piece 12f ′, the utility pole 6 and the intermediate tube 12 ′ are connected to the free band as in the first embodiment. 7, the intermediate tube 12 ′ can be fixed to the utility pole 6 without being bundled together.

  In this modification, the both side end portions of one pipe constituent member 12A 'are not widened, but the same width as the both side end portions of the other pipe constituent member 12B'. That is, when both are combined, the end faces are brought into contact with each other, and the intermediate tube 12 ′ is configured. In this modified example, as in the first embodiment, one of the tube components 12A ′. It is also possible to make the engaging pieces 12f 'be appropriately bent and fitted into the notches 12e' whose positions have moved in the radially outward direction.

<Second embodiment>
As shown in FIG. 4, the rising protection pipe 10 ″ according to the second embodiment includes a pair of pipe constituent members 12A ″ and 12B ″ constituting the intermediate pipe body 12 ″, and the first embodiment and its modifications. Although it is basically the same as that of the example, the fixing method of the pair of pipe constituent members 12A ″ and 12B ″ is different.

  That is, the intermediate tubular body 12 '' according to the second embodiment includes a fastening bracket 12h from which a pair of pipe constituent members 12A '' and 12B '' project from the side end portions. A bolt insertion hole is formed in the fastening bracket 12h, and a pair of pipe constituent members 12A ″ and 12B ″ are combined, and the fastening bracket 12h of one pipe constituent member 12A ″ and the other pipe constitution are combined. In a state in which the fastening bracket 12h of the member 12B '' is aligned with each other, the bolt is passed through the bolt insertion holes that coincide with each other, and the intermediate tube body 12 '' is fastened and fixed with bolts and nuts.

  Accordingly, the rising protection pipe 10 '' according to the second embodiment is such that any one of the pipe constituent members 12A '' (12B '') faces the road side, as in the first embodiment and the modifications thereof. And the same effects as those of the first embodiment and the modifications thereof are provided.

<Third embodiment>
As shown in FIG. 5, the rising protection pipe 10 ′ ″ according to the third embodiment includes a pair of pipe constituent members 12A ′ ″ and 12B ′ ″ constituting the intermediate pipe body 12 ′ ″. Although the form and the basics are the same, the difference is that a pair of pipe constituent members 12A ′ ″ and 12B ′ ″ are partially connected to be freely opened and closed.

  That is, the intermediate tube body 12 ′ ″ according to the third embodiment is configured such that one side end of each of the pair of tube constituent members 12A ′ ″, 12B ′ ″ is connected by the hinge 12i, and the other side. As in the second embodiment, a fastening bracket 12h is provided at the end.

  Then, the pair of pipe constituent members 12A ′ ″ and 12B ′ ″ are closed, and the fastening bracket 12h of one pipe constituent member 12A ′ ″ and the fastening bracket 12h of the other pipe constituent member 12B ′ ″. In such a state, the bolts are passed through the bolt insertion holes that coincide with each other, and the intermediate tube body 12 '' 'is fastened and fixed with bolts and nuts.

  Therefore, the rising protection pipe 10 ′ ″ according to the third embodiment is different from the first embodiment, the modified example thereof, and the second embodiment in that a pair of pipe constituent members 12A ′ ″ and 12B ′ ″. Are arranged so that the seam faces toward the road, and the same effects as those of the first embodiment, the modification thereof, and the second embodiment are obtained.

<Other embodiments>
In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the first embodiment, the modified example thereof, and the second embodiment, one of the pipe constituent members is arranged to face the road side, while in the third embodiment, a pair of pipe constituent members Are arranged so that the seam faces the road side, but the direction can be appropriately selected according to the situation at the site.

  In any of the above-described embodiments and the like, the pipe component member has a halved shape, but one pipe component member may be larger in the angle range than the other tube component member. That is, the shape in which one pipe constituent member is in an angle range smaller than 180 ° and the other pipe constituent member is divided in an angular range larger than 180 ° may be used.

  Further, in any of the above embodiments, the both ends of the intermediate tube are enlarged, but if the tube diameter of the lower tube and the upper tube is small, or the upper end and the upper tube of the lower tube As long as the lower end of the tube is at least reduced in diameter, both ends of the intermediate tube need not be expanded. However, in order to be able to divide the intermediate tube without pulling out the lower tube or the upper tube from the intermediate tube, it is more preferable that both ends of the intermediate tube are female. In any case, if at least the upper end of the intermediate tube is female, rainwater may enter from the joint with the upper tube, but in that case, the joint is closed with sealing means such as putty and packing. What should I do?

  In any of the above embodiments, the rising protection pipe is a circular pipe, but it goes without saying that it may be a square pipe.

  In any of the above-described embodiments and the like, a free band is illustrated as a means for fixing the rising protection pipe to the utility pole, but the invention is not limited to this, and a known fixing such as a string or a so-called rising steel pipe support hardware is provided. Means can be appropriately employed.

FIG. 2 is a rising protection pipe according to the first embodiment, in which (a) shows an explanatory diagram of the installation situation, and (b) shows a state diagram before assembly of the rising protection pipe. It is an intermediate tube body of the rising protection pipe according to the embodiment, wherein (A) is a perspective view in an exploded state, (B) is a perspective view in a combined state, and (C) is a top view thereof. Each is shown. It is an intermediate | middle tubular body which concerns on the modification of the embodiment, Comprising: (a) shows the perspective view of the disassembled state, (b) shows the perspective view of the combined state, respectively. It is a rising protection pipe which concerns on 2nd embodiment, Comprising: (a) is explanatory drawing of an installation condition, (b) shows the state figure of the intermediate | middle tubular body of this rising protection pipe, respectively. It is a rising protection pipe which concerns on 3rd embodiment, Comprising: (a) is explanatory drawing of an installation condition, (b) shows the state figure of the intermediate | middle tubular body of this rising protection pipe, respectively. The explanatory view of the installation situation of the conventional rising protection pipe is shown.

Explanation of symbols

2 Cable 6 Telephone pole 10, 10 ″, 10 ′ ″ Rise protection tube 11 Lower tube body 12, 12 ′, 12 ″, 12 ′ ″ Intermediate tube body 12A, 12A ′, 12A ″, 12A ′ ″ One pipe constituent member 12B, 12B ′, 12B ″, 12B ′ ″ The other pipe constituent member 12a Lower end portion 12b Upper end portion 12c Body portion 12d Side end portion 12e, 12e ′ Notch 12f, 12f ′ Engagement piece 12g Locking hole 12h Fastening bracket 12i Hinge 13 Upper tube

Claims (1)

A power pole rising protection pipe for protecting the cable's ground rising part when a cable buried in the ground such as a power cable and a communication cable is set up on the ground and attached to the power pole,
Adopting a structure that joins multiple pipes fixed to a utility pole by a flexible band,
Among the plurality of tubes, a tube including a region where damage (dent) may occur due to an automobile collision or the like is configured to be splittable,
The separable tube body is configured by a pair of tube constituent members having a shape obtained by splitting the tube body, and a lower end portion and an upper end portion of the separable tube body are an upper end portion of a lower non-divided tube body and In order to be able to insert the lower end portion of the upper non-divided tube body, it is a female die whose diameter is larger than that of the body portion excluding the lower end portion and the upper end portion, and each of the female die is along the side of the utility pole. A straight part for forming
Both ends of the one pipe component is such that both ends of the other pipe component is insertable, together with the widening, so that both ends of the other pipe component is matched, step by widening Part is formed,
Furthermore, widened body of the notches on both ends formed Rutotomoni, as fitted into the Ri-outs該切, side end portions of the body of the other pipe component, projecting from the both side end portions A utility pole rising protection pipe characterized in that an engaging piece is formed so that the tongue piece is bent outward and along the outer peripheral surface of the other pipe constituent member.

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