JP2005275124A - Aerial drop optical fiber protecting tube, mounting tool of the aerial drop optical fiber protecting tube, mounting device of the aerial drop optical fiber protecting tube and fitting method of the aerial drop optical fiber protecting tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continuously and simply mount an aerial drop optical fiber protecting tube onto an entire cable including a linear section and a bending section of an aerial drop optical fiber cable and to easily take out the supporting line of the aerial drop optical fiber cable. <P>SOLUTION: The aerial drop optical fiber protecting tube 1 is formed into a tubular body by a flexible, elastic and electrically insulating material. On the protecting tube 1, a crevice 11 is provided along the longitudinal direction of the tubular body and an aerial drop optical fiber cable 2 is inserted through the crevice 11 to store the cable inside the tubular body. Since the internal diameter of the aerial drop optical fiber protecting tube 1 is made into an approximate height of an optical fiber section 20B, a supporting line section 20A is pinched by and fixed to the crevice 11 while the tubular body is mounted onto the optical fiber cable 2 and the optical fiber section 20B is stored in an optical fiber insertion hole 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for protecting an aerial drop optical fiber cable, and more particularly, to an aerial drop optical fiber protective tube, an aerial drop optical fiber protective tube installation tool, an aerial drop optical fiber protective tube attachment device, and an aerial drop optical fiber protective tube. It relates to the mounting method.

  At the bent part of the aerial drop optical fiber cable, for example, at the retaining part on the power pole, wrap the wire protective cover to prevent damage to the jacket of the aerial drop optical fiber cable and the optical fiber from impact or rubbing due to contact with the power pole The technique to do is already known (for example, refer nonpatent literature 1).

Further, although not intended for overhead drop optical fiber cables, cable protection covers such as those listed in Non-Patent Document 2 and Non-Patent Document 3 are commercially available as protective products for general communication cables.
Asaba Seisakusho Co., Ltd., “PVC wire cover”, Asaba catalog for information communication, 16th edition, p. 7 Daito Denko Co., Ltd., “Line Supporter (Cable Protection Cover)”, [Online], [Search on March 18, 2004], Internet <URL: http://www.daito-d.co.jp/Catalog/ TS / ts_001.html> Daito Denko Co., Ltd., “Protector”, [Online], [Search on March 18, 2004], Internet <URL: http://www.daito-d.co.jp/Catalog/TS/ts_002.html>

  However, the above-mentioned commercially available cable protective cover protects the straight portion (horizontal portion) of the cable, and cannot be attached to the above-described bent portion, and the cable protective cover has a large diameter. Since the cable is intended, there is a problem that the aerial drop optical fiber cable having a small diameter is too large to be suitable for mounting.

  In addition, if the conventional wire protection cover attached to the bent portion of the aerial drop optical fiber cable is to be used continuously throughout the entire cable including the straight portion, the wire protection cover 9 has an optical Since not only the fiber portion 20B but also the support wire portion 20A is concealed and wound around the wire protection cover 9, the attachment is not easy, and once the wire protection cover 9 is attached, the support wire portion 20A is taken out. There is a problem that is difficult.

  The present invention has been made to solve the above problems, and can be continuously and easily attached to the entire cable including the straight portion and the bent portion of the aerial drop optical fiber cable, and the aerial drop optical fiber. An object of the present invention is to provide an aerial drop optical fiber protective tube, an aerial drop optical fiber protective tube installation tool, an aerial drop optical fiber protective tube mounting device, and an aerial drop optical fiber protective tube mounting method that allows easy removal of a cable support line. To do.

  To achieve the above object, the present invention according to claim 1 is an aerial drop optical fiber protective tube of a tubular body made of an electrically insulating material having flexibility and elasticity, wherein A split is provided in a direction, and a support line portion of an aerial drop optical fiber cable housed in the pipe body is sandwiched by the split from the split.

  According to a second aspect of the present invention, in the first aspect of the present invention, the thickness of the crack in the tubular body is smaller than the outer diameter of the support line portion, and a part of the surface of the support line portion is formed from the tubular body. It is characterized by protruding.

  The present invention according to claim 3 is an aerial drop optical fiber protective tube installation tool composed of a metal plate having a V-shaped opening, and is provided from two ends of the opening toward the bottom of the groove. The aerial drop optical fiber protective tube according to claim 1 or 2 is fixed in an open state by a latching portion, and the aerial drop optical fiber protective cable is accommodated in the aerial drop optical fiber protective tube.

  The present invention described in claim 4 is an aerial drop optical fiber protective tube mounting device in which the overhead drop optical fiber protective tube mounting tool according to claim 3 is attached to the top of the pedestal that becomes thinner as it goes upward. To do.

  According to a fifth aspect of the present invention, there is provided an aerial drop light for mounting the aerial drop optical fiber protective tube according to the first or second aspect to an aerial drop optical fiber cable using the aerial drop optical fiber protective tube installation tool according to the third aspect. It is a fiber protective tube mounting method.

  According to a sixth aspect of the present invention, there is provided an aerial drop light for mounting the aerial drop optical fiber protective tube according to the first or second aspect to an aerial drop optical fiber cable using the aerial drop optical fiber protective tube mounting device according to the fourth aspect. It is a fiber protective tube mounting method.

  According to the present invention, the aerial drop optical fiber can be continuously and easily attached to the entire cable including the straight portion and the bent portion of the aerial drop optical fiber cable, and the support line of the aerial drop optical fiber cable can be easily taken out. A protective tube, an aerial drop optical fiber protective tube installation tool, and an aerial drop optical fiber protective tube mounting method can be provided.

  As a result, the aerial drop optical fiber protective tube of the present invention can be applied to an aerial drop optical fiber cable in a place where there is a possibility of being damaged by the action of a living thing, preventing damage caused by a living thing and preventing a communication line failure beforehand. be able to. In addition, even after the aerial drop optical fiber protective tube of the present invention is attached, the support line of the aerial drop optical fiber cable can be easily taken out at an arbitrary location, so that the protected aerial drop optical fiber cable can be connected to the utility pole. It is possible to improve the work efficiency when installing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a perspective view showing an appearance of an aerial drop optical fiber protective tube 1 according to a first embodiment of the present invention. 1A shows an aerial drop optical fiber protective tube 1 not attached to the aerial drop optical fiber cable 2, and FIG. 1B shows an aerial drop attached to the aerial drop optical fiber cable 2. An optical fiber protective tube 1 is shown.

  An aerial drop optical fiber protective tube 1 shown in FIG. 1 is formed in a tubular body with an electrically insulating material having flexibility and elasticity, and a crack 11 is provided in the longitudinal direction of the tubular body. The aerial drop optical fiber cable 2 is inserted from above and stored in the tube.

  As shown in FIG. 1B, the inside diameter of the aerial drop optical fiber protective tube 1 is about the height of the optical fiber portion 20B of the aerial drop optical fiber cable 2, so that it is attached to the aerial drop optical fiber cable 2. In this state, the support line portion 20A of the aerial drop optical fiber cable 1 is sandwiched and fixed between the cracks 11, and the optical fiber portion 20B is accommodated in the optical fiber insertion hole 12. ing.

  By configuring the aerial drop optical fiber protective tube 1 in such a configuration, the aerial drop optical fiber cable 2 can be easily attached to the aerial drop optical fiber cable 2. It can be continuously attached to the (holding portion). As a result, the impact due to the contact with the utility pole can be reduced as in the conventional case, and the optical fiber portion 20B of the aerial drop optical fiber cable 2 can be prevented from being damaged by the action of living things such as insects and birds. It becomes.

  Furthermore, since the aerial drop optical fiber protective tube 1 has a crack 11 on its surface and the support wire portion 20A is partially exposed, after the aerial drop optical fiber protective tube 1 is attached to the aerial drop optical fiber cable 2 However, the support wire portion 20A can be easily taken out at an arbitrary place and the support wire portion 20A can be peeled off. Thus, since the overhead drop optical fiber protective tube 1 is excellent in workability, the work efficiency of the infrastructure maintenance work for the overhead drop optical fiber cable 2 can be greatly improved.

  FIG. 2 is a diagram showing a mounting state of the aerial drop optical fiber protective tube 1. As shown in FIG. 2, the aerial drop optical fiber protective tube 1 is attached to a straight portion (for example, location A) and a bent portion (for example, location B) of an aerial drop optical fiber cable 2 that has already been laid, For example, as shown in the location C, the aerial drop optical fiber cable 2 can be attached when it is newly extended from the ground and laid. Here, at the location C, the aerial drop optical fiber cable 2 is fed out from the aerial drop optical fiber feeder 3 and the aerial drop optical fiber protective tube 1 is taken out from the aerial drop optical fiber protective tube packing case 4 to be joined together. An aerial drop optical fiber protective tube 1 is attached to the drop optical fiber cable 2.

  FIG. 3 is an explanatory diagram in the case where the aerial drop optical fiber protective tube 1 is attached to a straight line portion (for example, the location A). According to the figure, the crack 11 of the aerial drop optical fiber protective tube 1 is opened by the protective tube installation tool 5, and the aerial drop optical fiber protective tube 1 is fixed in the opened state. The aerial drop optical fiber protection tube 1 is continuously accommodated by moving the protection tube installation tool 5 along the longitudinal direction of the aerial drop optical fiber protection tube 1. It can be attached. Further, the use of the protective tube attaching tool 5 makes it possible to more easily attach it. Here, as shown in FIG. 3, the protective tube mounting tool 5 is a metal tool having a V-shaped opening, and by two hooks provided from both ends of the opening toward the groove bottom, The aerial drop optical fiber protective tube 1 is opened and fixed.

  FIG. 4 is an explanatory diagram when the aerial drop optical fiber protective tube 1 is attached to a bent portion (for example, the location B). As shown in FIG. 3, it is possible to continuously mount the aerial drop optical fiber protection tube 1 with the protection tube installation tool 5 as in FIG. The optical fiber portion 20B of the aerial drop optical fiber cable 2 can be protected by taking out only the support wire portion 20A of the aerial drop optical fiber cable 2 from the fiber protection tube 1 and peeling it off.

  FIG. 5 is an explanatory diagram in the case where the aerial drop optical fiber protective tube 1 is attached when the aerial drop optical fiber cable 2 is newly extended from the ground and laid (for example, at location C). According to the figure, the aerial drop optical fiber cable 2 and the split 11 are opened by using the protective tube attaching device 6 in which the protective tube attaching tool 5 is attached to the top of the triangular base that becomes thinner as it goes upward. Since the aerial drop optical fiber protective tube 1 is joined and the aerial drop optical fiber protective tube 1 is attached, the aerial drop optical fiber protective tube can be easily installed even when a new aerial drop optical fiber cable 2 is laid. 1 can be attached.

<Other embodiments>
FIG. 6 is a diagram showing an aerial drop optical fiber protective tube 1 ′ according to the second embodiment. In the aerial drop optical fiber protective tube 1 ′, the thickness of the pipe of the crack 11 ′ is thinner than that of the support line portion 20A of the aerial drop optical fiber cable 2, so that the surface of the support line portion 20A is partly a It protrudes from the protective tube 1 ′.

  Therefore, the aerial drop optical fiber protection tube 1 ′ can obtain the same effect as the aerial drop optical fiber protection tube 1, and can more easily take out the support line portion 20A of the aerial drop optical fiber cable 2. .

1 is a perspective view of an aerial drop optical fiber protective tube according to a first embodiment of the present invention. It is a figure explaining the condition where the aerial drop optical fiber protection tube which concerns on the 1st Embodiment of this invention is applied. It is a figure explaining a mode in the case of attaching the aerial drop optical fiber protection tube which concerns on the 1st Embodiment of this invention to a linear part. It is a figure explaining a mode in the case of attaching the aerial drop optical fiber protection tube which concerns on the 1st Embodiment of this invention to a bending part. It is a figure explaining a mode in the case of attaching to the aerial drop optical fiber which newly constructs the aerial drop optical fiber protective tube which concerns on the 1st Embodiment of this invention. It is a perspective view of an aerial drop optical fiber protection tube concerning a 2nd embodiment of the present invention. It is a perspective view of the conventional electric wire protection cover.

Explanation of symbols

1,1 'aerial drop optical fiber protective tube 2 aerial drop optical fiber cable 3 aerial drop optical fiber feeder 4 aerial drop optical fiber protective tube packing case 5 protective tube installation tool 6 protective tube installation device 9 electric wire protective cover 11 optical fiber insertion Hole 20A Support wire portion 20B Optical fiber portion 21 Support wire 22 Core wire 23 Tension member

Claims (6)

A tubular aerial drop optical fiber protective tube formed of an electrically insulating material having flexibility and elasticity,
An aerial drop optical fiber protective tube characterized in that a fissure is provided in the longitudinal direction of the tubular body, and a support wire portion of an aerial drop optical fiber cable housed in the tubular body is sandwiched by the fissure from the fissure.   The aerial drop optical fiber according to claim 1, wherein a thickness of the crack of the tubular body is smaller than an outer diameter of the support line portion, and a part of a surface of the support line portion protrudes from the tube body. Protective tube. An aerial drop optical fiber protective tube installation tool composed of a metal plate having a V-shaped opening,
3. The aerial drop optical fiber protective tube is fixed in an open state by the two hanging portions provided from both ends of the opening toward the bottom of the groove. An aerial drop optical fiber protective tube installation tool characterized by containing an aerial drop optical fiber cable in   An aerial drop optical fiber protective tube mounting device, wherein the aerial drop optical fiber protective tube mounting tool according to claim 3 is attached to the top of the pedestal that becomes thinner as it goes upward.   An aerial drop optical fiber protective tube is attached to the aerial drop optical fiber cable using the aerial drop optical fiber protective tube installation tool according to claim 3. Method.   An aerial drop optical fiber protective tube is attached to the aerial drop optical fiber cable using the aerial drop optical fiber protective tube attachment device according to claim 4. Method.

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