JPH05272664A - Cable supporting method and device therefor - Google Patents

Abstract

(57) [Summary] [Purpose] To quickly lay an optical fiber cable inside a tubular body with a simple device. [Structure] A support plate 2 supporting a cable 4 is fixed,
Longer than the half circumference of the tubular body 100 on which the cable 4 is laid,
After holding both ends of the elastic holder 1 with the locking members 3 to hold the holder 1 in a bow shape, the holder 1 is introduced into the tubular body 100 and the locking of the locking member 3 is released inside. The cable 4 is laid on the ceiling side inside the tubular body by utilizing the restoring force of the holder 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a cable inside a pipe and a method thereof, and a device for inserting and laying, for example, an optical fiber cable inside an underground pipe such as a sewer pipe. Regarding the method.

[0002]

2. Description of the Related Art Various pipes are arranged in buildings, in the ground, and in the air. When laying a new cable, there are many obstacles to the installation of a structure for laying the cable in terms of physical and economical aspects. For example, in recent years, it has been desired to lay a communication cable due to the large amount and diversification of information transmission, but this new installation is not easy, and it is often considered to lay it using existing equipment. There is. For example, it is considered that an optical fiber cable or the like is stretched around an existing sewer pipe to form an optical communication network.

However, it is difficult to use the existing equipment.
For example, about 80% of the sewer pipe is occupied by a diameter of 70 cm or less that cannot be entered by a person, so it is difficult to hang or suspend the optical fiber cable on the ceiling of the sewer pipe. Therefore, robots are used. The robot consists of a leading car for towing and cleaning, a laying car for work, a camera car for monitoring, etc., and runs on its own in a small-diameter pipe to expose the inner wall of the pipe, open a hole for the cable hook, and fix it. The driving of staples is automatically and sequentially performed, and the optical fiber cable is hooked / suspended on the ceiling of the sewer pipe. According to this, the construction accuracy is improved, and the work of excavating the ground during the laying work is minimized.

[0004]

However, the construction method using a robot has a problem that it takes a long time to lay a cable because hook portions are constructed one by one on the sewer pipe. Also,
Due to the complex and expensive equipment, the installation cost is considerable.

Therefore, an object of the present invention is to quickly and easily lay a cable inside a tubular body or the like.

[0006]

The cable supporting device of the present invention has elastic members each having a cable supporting means (2) and longer than a half circumference of the tubular body (100) on which the cable (4) is laid. One or a plurality of holders (1); and holding both ends of the holder (1) in a bow shape to hold the holder (1) in a predetermined manner with a line connecting the locking positions of both ends as a rotation axis. It is provided with one or a plurality of locking members (3) which are disengaged by rotating by an angle and allow the elastic restoration of the holder (1). In addition,
Symbols in parentheses indicate corresponding elements or corresponding matters in the embodiments shown in the drawings and described later.

Further, the cable supporting method of the present invention has a tubular body (1) having cable supporting means (2) and laying a cable (4).
A wire with a cable holder (4) supported by an elastic holder (1) longer than half the circumference of (00) and a stopper (6) fixed.
The holder (1) is locked by locking both ends of the holder (1) with a locking member (3) having an arm extending in a direction perpendicular to the rotation axis in which a guide hole (32) penetrated by (5) is formed. ) In the shape of a horseshoe and pull the holder (1) with the wire (5) to hold the holder inside the tubular body.
(1) is introduced, the holder is unlocked by rotating the arm and rotating the arm by a predetermined angle around the line connecting the locking positions of both ends as the rotation axis, and the holder (1) is placed inside the tubular body. The fastening member (3) is pulled out from the tubular body (100) by pulling the wire (5).

[0008]

[Function] Since the holder (1) having the cable support means (2) has elasticity, the holder (1) is held in an arched shape by being locked to both ends of the holder (1) by the locking member (3). The tubular body (10
Insertion into 0) is possible. After supporting the cable (4) with the supporting means (2) and inserting the holder (1) into the tubular body (100) and placing it at a required position, the locking member (3) is rotated by a predetermined angle to release the locking. When the holder (1) is released, both ends of the holder (1) are opened by a restoring force while supporting the cable, and the holder (1) is in close contact with the inner surface of the tubular body (100) to form an arc shape. If the length of the holder (1) is shorter than the half circumference of the tubular body (100), a gap is created between the tubular body (100) and the holder (1). Have been longer than. As a result, the holder (1) supporting the cable does not move in the lengthwise and radial directions of the tubular body (100), and the cable is supported by the holder (1) inside the tubular body (100).

Therefore, for example, a plurality of holders (1) are attached at a predetermined pitch to an optical fiber cable that is passed through a sewer pipe that cannot be entered by people, and these holders (1) are sequentially introduced into the sewer pipe together with the cable. , After putting it in place,
By releasing the lock of the lock member (3), the optical fiber cable is automatically installed in the sewer pipe.
Since processing such as drilling is not performed on tubular bodies such as sewer pipes,
Cable laying takes less time and costs less.

As the material of the holder (1), stainless steel, titanium, phosphor bronze, FRP (fiber reinforced plastic), synthetic resin and other spring materials are used.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0012]

FIG. 1 shows an example of a cable support device embodying the present invention. This device is a plate-shaped (or rod-shaped) holder having elasticity (a stainless steel plate is used in this embodiment).
1, a holder 1, which is fixed to the holder 1 by spot welding, for supporting the optical fiber cable, and a T-shaped locking member 3 for holding the holder 1 in a bow-shaped deformed state.

Claw portions 3 are provided at both ends of the locking member 3 in the x-axis direction.
3, 34 and hooks 31 are provided at the ends in the z-axis direction, respectively, and these are integrally formed. Holder 1
Stop holes 11 and 12 are formed in both end portions of the blade, that is, the wing portion, and the claw portions 3 of the locking member 3 are inserted into the stop holes 11 and 12.
By rotating the locking member 3 through 3, 34,
The claw portions 33 and 34 engage with the outside of the holes 11 and 12 of the holder 1, and the holder 1 is held in an arc shape or a horseshoe shape as shown in FIG. At this time, the hook 31 is hooked on the support plate 2. The holder 1 that is not locked by the locking member 3 has a generally rectangular shape as shown in FIG.
Further, the size of the entire device when it is held in an arc shape or a horseshoe shape (FIG. 1) is a size that can easily pass through the inside of a sewer pipe 100 (FIG. 6) described later.

FIG. 3 shows the structure of the support plate 2 shown in FIG. The support plate 2 is a combination of two plates 2a and 2b as shown in the figure, and a hole is formed near the center of each plate.
The plates 2a and 2b have elasticity capable of moving to some extent in the z direction as shown by the chain double-dashed line in FIG. These plates 2a, 2b
Push the fiber optic cable 4 in between and then
As shown in (b), the optical fiber cable 4 is inserted into the support plate 2 (2
a, 2b). Therefore, when supporting the optical fiber cable 4, it is not necessary to particularly pass the end portion of the optical fiber cable 4 between the support plate 2 and the holder 1.

Referring again to FIG. The vertical arm of the locking member 3 is provided with a guide hole 32.
A wire 5 penetrates through. The wire 5 is provided with stoppers 6 and 7 at positions facing each other around the guide hole 32. The stoppers 6 and 7 are larger than the guide hole 32 and do not penetrate the guide hole 32.

FIG. 4 shows the side surface of the locking member 3 shown in FIG.
FIG. 5 shows a state in which it is driven by the wire 5. In the state shown in FIG. 4, if the wire 5 is pulled to the left side of the paper in the y-axis direction,
The stopper 6 hits the guide hole 32, and as shown by the chain double-dashed line in FIG. 5, the locking member 3 rotates counterclockwise with the claw portions 33 and 34 (not shown) as fulcrums. At this time, the claw portions 33 and 34 also rotate counterclockwise in the same manner, so that the claw portion 3
When 3 and 34 are at an angle of 90 degrees with respect to the vertical arm of the locking member 3, the extending direction of the claw portions 33 and 34 is the position along the z-axis direction (rotation by 90 degrees, θ = 90) (actually). Has
Approximately 70 degree rotation related to the width of the guide hole 32 in the y-axis direction
= 70), the claw portions 33, 3 for the holder 1
4, the holder 1 is brought into the state shown in FIG. 2 by the restoring force, and the locking member 3 is disengaged from the holder 1. When the claw portions 33, 34 are at an angle smaller than 90 degrees with respect to the vertical arm of the locking member 3, the locking member 3 is disengaged from the holder 1 by rotation of an angle smaller than 70 degrees.

In the state of FIG. 4, when the wire 5 is pulled to the right side of the drawing in the y-axis direction, the stopper 7 comes into contact with the guide hole 32. At this time, since the hook 31 is hooked on the support plate 2, the holder 1 moves rightward together with the locking member 3. That is, when the wire 5 is pulled in the right direction, the holder 1 moves rightward together with the locking member 3.

FIG. 6 shows the support device shown in FIG.
FIG. 7 shows a state in which the vertical arm of the locking member 3 is rotated and separated from the holder 1 in that state. Holder 1 in the separated state (solid line in FIG. 7)
Is fixed by the restoring force along the inner ceiling side of the sewer pipe 100, and the optical fiber cable 4 is attached to the sewer pipe 10.
It is supported by 0 inner ceiling. The long axis length of the holder 1 is
Since it is longer than the semicircular length of the sewer pipe 100, in the state where the holder 1 is released as shown by the solid line in FIG. 1
00 is closely adhered to the inner surface of the circular arc 00 and becomes an arc larger than the semicircle. As a result, the holder 1 does not move downward from the solid line position shown in FIG.

In this embodiment, the inner diameter of the sewer pipe 100 is 250 mm, the length of the holder 1 in the longitudinal direction is 487 mm,
The length of the locking member 3 in the x-axis direction is 177 mm,
The length in the z-axis direction was 122 mm.

Next, an example of a procedure of laying the optical fiber cable 4 on the sewer pipe 100 using a plurality of the supporting devices shown in FIG. 1 will be described with reference to FIGS. 8, 9 and 10. A person can enter the manholes A and B in FIG. It is assumed that one section of the optical fiber cable 4a has been laid up to the manhole, and a procedure for laying one section of the optical fiber cable 4b in the section from the manholes B to A will be described. About 30m from manhole B to A
And 15 supporting devices (G ₁ , G ₂ , G ₂ with a pitch of about 2 m between the manholes BA, each having the structure shown in FIG.
G ₃ , ..., G ₁₃ , G ₁₄ , G ₁₅ ) are used.

(1) Sewer pipe 1 between manholes B and A
00, one wire 5 from manhole A to B
Pass through. The length of the wire 5 is such that a laying portion of 30 to 40 m equipped with 15 or more locking members 3 and stoppers 7 and 6 and a guide portion of only the wire, which is about the same length, are continuous. is there. The wire passes through this guide portion through the sewer pipe 100. In addition, the stopper 7 for inserting the holder
Has a pitch of 2 m, but the stopper 6 for releasing the holder has a pitch of 2 m + 1 to 5 cm, which is slightly longer than 2 m. In addition, the tip portion of the optical fiber cable 4b has a predetermined distance (the length of the cable from the connector of the manhole B to the supporting device G1 described later) to the guide portion side from the boundary between the wire-only guide portion and the installation portion. It is tied to the wire 5 with a wire at the taken position.

(2) In the manhole A, by opening the supporting plate 2 of the first supporting device G1 as shown by the two-dot chain line in FIG. 3 (a) and inserting the optical fiber cable 4b between them, It is attached to the optical fiber cable 4b. The support plate 2 is a split pin 8, and as shown in FIG.
Connect between a and 2b. At this time, the optical fiber cable 4b is covered with rubber or the like having a high frictional force, and the support plate 2 supports the optical fiber cable 4b on the holder 1 by compression. Therefore, the optical fiber cable 4b is fixed to the holder 1. Next, the holder 1 of the supporting device G1 is bent into a horseshoe shape to connect the first locking member 3 of the wire 5. And the first
The supporting device G1 of 1 is inserted into the sewer pipe 100. As a result, the first support device G1 is moved to the sewer pipe 1 as shown in FIG.
It is in 00 and is suspended from the optical cable 4b. Then, pull the wire 5 by 2 m in the manhole B.
At this time, the first stopper 7 comes into contact with the guide hole 32,
The entire supporting device G1 moves to the manhole B point side about 2 m from the manhole A point together with the optical cable 4b.

(3) Next, similarly, the second supporting device G2 is connected to the optical fiber cable 4b, the second locking member 3 of the wire 5 is connected to this supporting device G2, and the sewer pipe 100 is connected. The wire 5 is pulled to the manhole B side by 2 m. As a result, the supporting device G1 and the optical cable 4b move from A to about 4 m, and the supporting device G2 moves to the B side from A from about 2 m together with the optical cable 4b.

(4) Similarly, the procedure of (5) is repeated from the supporting device G3 to the supporting device G15, and 15
The individual support devices are introduced into the sewer pipe 100.

As described above, the fifteen supporting devices G1 to G1
5 is arranged with the optical fiber cable 4b in the sewer pipe 100 between the manholes A and B at a pitch of 2 m.

(5) Next, the optical fiber cable 4b is lifted from the manholes A and B to hold the 15 support devices vertically, and then the support device wires 5 are attached to the manhole A.
When pulled from the point to the left side, as shown in FIGS. 9 and 10, the guide hole 32 of the 15th locking member 3 connected to the 15th support device G15 on the front side is inserted into the guide hole 32. The stopper 6 first contacts, and the 15th locking member 3 rotates counterclockwise. When the 14th stopper 6 is rotated to some extent, the 14th stopper 6 comes into contact with the guide hole 32 of the 14th locking member 3 engaged with the 14th supporting device G14, and the 14th locking member 3 is moved. Starts rotating counterclockwise. In this way, the 15th to 1st locking members 3 sequentially rotate counterclockwise. 9A shows a state before the wire 5 is pulled from A to the left side, and FIG. 9B shows a state in which the locking member 3 of the supporting device G15 is rotated 10 degrees with respect to the z axis. FIG. 10A shows a state in which the locking member 3 of the supporting device G15 is rotated by 25 degrees with respect to the z axis and the locking member 3 of the supporting device G14 is rotated by 10 degrees. The stop member 3 rotates 45 degrees with respect to the z-axis, and the locking member 3 of the supporting device G14 moves to 2 degrees.
FIG. 10B shows a state in which the locking member 3 of the supporting device G13 is rotated 5 degrees and the locking member 3 of the supporting device G13 is rotated 10 °. The locking member 3 of G14 rotates 45 degrees, and the locking member 3 of the supporting device G13 moves to 2
The state of being rotated 5 degrees is shown respectively.

(6) As shown in FIG. 10C, when the locking member 3 of the supporting device G15 rotates about 70 degrees with respect to the z axis, the claw portions 33 and 34 of the locking member 3 are removed from the holder 1. As shown by the solid line in FIG. 7, the holder 1 is detached and fixed along the inner ceiling side of the sewer pipe 100, and the optical fiber cable 4 is supported by the inner ceiling portion of the sewer pipe 100. In addition, until the locking member 3 comes off the holder 1, the angle of the claw portions 33 and 34 with respect to the vertical arm of the locking member 3 is set to an angle smaller than 90 degrees as shown in FIGS. The vertical arm has a smaller rotation angle. That is, the locking member 3 is easily disengaged.

(7) Similarly, from the supporting device G14 to the supporting device G1, the claw portion of the locking member is sequentially removed from the holder, and the holder is fixed along the inner ceiling side of the sewer pipe 100. It As a result, the optical fiber cable 4 is laid on the inner ceiling part of the entire length of the sewer pipe 100.

(8) Manhole B of the optical cable 4b
Connect the side end to the connector and connect it to the optical fiber cable 4a in the front section. Pull up the manhole A side end vertically and first support it with a hanger and then run it along the inner peripheral surface of the manhole A for about a half turn. To the connector.

Although stainless steel is used as the holder 1 in this embodiment, other metal plates or resin plates may be used, but it is preferable that the holder 1 is thin and has a high elastic restoring force and does not rust.

Further, as shown in FIG. 11, the auxiliary plate 9 may be attached in the y-axis direction at a position which becomes the ceiling of the holder 1. According to this, when the holder 1 is along the inner ceiling side of the sewer pipe 100, the inclination shift in the y-axis direction due to the subsequent vibration is prevented. Alternatively, the thickness width of the holder 1 in the y-axis direction may be widened.

FIG. 12 shows the outer appearance of the holder 1 of another embodiment. In this embodiment, a support claw 2c is formed by punching in the middle part of the holder 1 which is a stainless steel plate, and the middle part is press-formed into a U-shape for storing a cable, and at the same time when the support claw 2c is punched and formed. An inverted T-shaped locking opening 2d for inserting the T-shaped portion at the tip of the support claw 2c is punched out. In this embodiment, the tip of the support claw 2c is slightly raised to insert the cable into the U-shaped space, and the tip of the support claw 2c is lowered to be seated in the wide opening 2d1 of the inverted T-shaped locking opening 2d. Due to the restoring force of the support claw 2c, the tip of the support claw 2c rises and the neck part rises to the narrow opening 2d2 of the inverted T-shaped locking opening 2d. As a result, the support claw 2c does not come off from the opening 2d.

[0033]

As described above, according to the present invention, for example, a plurality of holders (1) are attached at a predetermined pitch to an optical fiber cable that passes through a sewer pipe that cannot be entered by a person, and these holders ( 1) is sequentially introduced into the sewer pipe,
The optical fiber cable is automatically installed in the sewer pipe by releasing the locking of the locking member (3) after the optical fiber cable is placed at a predetermined position.

Since the tubular body such as the sewer pipe is not processed by drilling, the time required for laying the cable is short and the cost is low.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cable support device according to an embodiment of the present invention.

FIG. 2 is a front view showing the holder 1 unlocked by the locking member 3 shown in FIG.

3A and 3B show a configuration of a support plate 2 shown in FIG. 1, where FIG. 3A is an enlarged perspective view and FIG. 3B is an enlarged front view.

FIG. 4 is an enlarged side view showing the locking member 3 shown in FIG. 1.

5 is an enlarged side view showing a movable state of the locking member 3 shown in FIG.

6 is a front view showing a state in which the support device shown in FIG. 1 is introduced into the sewer pipe 100. FIG.

7 is a front view showing a state in which the locking by the locking member 3 of the supporting device shown in FIG. 6 is released.

FIG. 8 is a side view showing a state in which a plurality of the supporting devices shown in FIG. 1 are introduced into a sewer pipe (sewage pipe) 100.

FIG. 9: Support devices G13, G14, G15 shown in FIG.
3 is a side view showing a state in which the fiber 4 is laid in the sewer pipe (sewage pipe) 100. FIG.

FIG. 10: Support devices G13, G14, G1 shown in FIG.
FIG. 5 is a side view showing a state in which the fiber 4 is laid in the sewer pipe (sewage pipe) 100.

11 is a perspective view showing a supporting device in which an auxiliary plate 9 is attached to the holder 1 shown in FIG.

FIG. 12 is a perspective view showing a cable support device according to another embodiment of the present invention.

[Explanation of symbols]

1: Holder 2: Support plate 2c: Support claw 2d: Locking opening 2d1: Wide opening 2d2: Narrow opening 3: Locking member 4: Optical fiber cable 5: Wire 6,7: Stopper 8: Split pin 9: Auxiliary plate 11, 12: Stop hole 31: Hook 32: Guide hole 33, 34: Claw portion 100: Sewer pipe G1 to G15: Support device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Kurihara 3-5-4 Tsukiji, Chuo-ku, Tokyo Inside Nittetsu Welding Industry Co., Ltd. (72) Inventor Ryuichi Inami Otemachi, Chiyoda-ku, Tokyo 2-6-3 Shin Nippon Steel Corporation (72) Inventor Isao Iijima 5-44-13 Denenchofu, Ota-ku, Tokyo

Claims (6)

[Claims] 1. An elastic member 1 each having a cable supporting means and longer than a half circumference of a tubular body for laying a cable.
Or a plurality of holders; and, by holding both ends of each of the holders to hold the holder in a bow shape, the holders are engaged by rotating at a predetermined angle with a line connecting the locking positions of the both ends as a rotation axis. A cable supporting device comprising one or a plurality of locking members that are unraveled to allow the elastic restoration of the holder. 2. The locking member further comprises an arm having a guide hole and extending in a direction perpendicular to the rotating shaft, and at the same time, a wire passing through the guide hole as locking means for releasing the locking, and The cable support device according to claim 1, further comprising a stopper fixed to the wire and larger than the guide hole. 3. The hook, wherein the locking member engages with the holder at the tip of the arm by rotation of the arm in a direction opposite to the unlocking direction, and disengages from the holder by rotation in the unlocking direction. The cable support device according to claim 2, further comprising: 4. The cable supporting device according to claim 3, wherein one stopper is made of a pair of a locking restraining contact member and a release contact member positioned on both sides of the guide hole with the guide hole interposed therebetween. 5. A cable holder is provided to support the cable with a holder having elasticity, which is longer than a half circumference of a tubular body on which the cable is laid, and a guide hole through which a wire to which a stopper is fixed is penetrated is formed. A locking member having an arm extending in a direction perpendicular to the rotation axis, locking both ends of the holder to hold the holder in a horseshoe shape, pulling the holder with the wire to introduce the holder into the tubular body, By rotating the arm and rotating it by a predetermined angle with the line connecting the locking positions of both ends as the axis of rotation, the holder is unlocked and the holder is retained inside the tubular body, and the wire is pulled to lock the locking member. A cable support method that pulls out from a tubular body. 6. A cable is provided with a plurality of elastic holders having cable supporting means and having a length longer than a half circumference of a tubular body on which the cable is laid, and the stoppers are fixed at a predetermined pitch. Each of a plurality of locking members each having an arm extending in a direction perpendicular to the rotation axis in which a guide hole through which the wire is penetrated is drilled, and both ends of each holder are locked to hold the holder in a horseshoe shape. , Pull the wire and apply the stopper to the arm to introduce the holder into the tubular body, and pull the wire in the direction opposite to the pulling direction at the time of introduction to apply the stopper to the arm and rotate the arm. A cable supporting method in which the holder is unlocked, the holder is retained inside the tubular body, and the locking member is pulled out from the tubular body.