JPH09298814A - Cable hanger, and its mounting method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable hanger made of a leaf spring which is used for hanging a cable from a messenger wire and can be installed to the messenger wire in a simple operation and is suitable for the automatic attachment by the remote control from the ground or by a robot. SOLUTION: This is a cable hanger 1 made of a leaf spring for handing a cable from a messenger wire, and this has a cable tubular part 2 which is made by bending a leaf spring in a spiral form and has an upward opening 20, and two hooking tubular parts 3 and 3 which are provided by extending both the ends of this retaining tubular part 2 and bending them inward and which have downward hooking recesses 30 and besides which are provided in series in the axial direction of a messenger wire and are used for hooking to the above messenger wire, and the interval L in the orthogonal direction to the cable, between these two hooking tubular parts is equivalent to or more than the diameter of the cable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leaf spring cable hanger for suspending a cable such as an electric wire on a messenger wire stretched on a utility pole or the like.

[0002]

2. Description of the Related Art A worker suspends a cable from a messenger wire by manually hanging a worker on a messenger wire stretched between telephone poles or by riding a worker on an elevator with a worker lifting device. This is done by holding the cable in the center of the cable hanger and hooking both ends of the cable hanger to the wire. Since this cable hanger installation work is dangerous and the work cost is high, remote operation from the ground and automation by a robot are desired.

[0003]

Since the conventional cable hanger is premised on manual attachment with a high degree of freedom, it is difficult to use it as it is for automatic attachment by a robot hand.

An object of the present invention is to provide a cable hanger for hanging a cable on a messenger wire.
(EN) Provided are a leaf spring cable hanger having a structure which can be performed by a simple operation and is suitable for remote control from the ground and automatic attachment by a robot, its attachment method, and an attachment device.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a leaf spring cable hanger for suspending a cable on a messenger wire, which is formed by bending a strip plate in a spiral shape and has an upward opening. Part and two ends of the holding cylinder part are respectively bent and provided inwardly, have downward hooking ports, and have two hooks on the messenger wire provided in series in the axial direction of the messenger wire. A tubular portion, and a gap between the two hooking tubular portions in a direction orthogonal to the cable is equal to or larger than a diameter of the cable.

[0006]

The leaf spring cable hanger of the present invention is mounted by the following operation. A) With the robot hand, hold the cable hanger so that the upward opening of the holding cylinder is up. Next,
The cable hanger is lifted from below the cable, and the cable and the wire are inserted into the holding tube through the upward opening.

(B) Next, the robot hand slightly closes the upward opening of the holding cylinder with the robot hand so that the two downward hooking holes fit smoothly on the wire (the two downward hooking ports substantially match each other). Compress to position). In the case where the bent-back portion according to the second aspect is provided, the width of the tip of each of the bent-back portions is maximized.

C) Next, when the cable hanger is displaced downward by the robot hand, the wires are fitted into both the hanging cylinders simultaneously from the downward hooking ports, and the cable is hung on the wires by the cable hanger.

[0009]

According to the cable hanger of the present invention, the cable can be hung on the wire by a simple operation of only raising and lowering the cable hanger held by the robot hand. Therefore, remote operation from the ground and automation by a robot are easy. In addition, since the wire generally has a smaller diameter than the cable, the wire can be easily inserted through the upward opening when the cable is inserted through the upward opening.

[0010]

1 and 2 show a cable hanger 1 made of a leaf spring, in which a strip plate 11 made of a leaf spring material is spirally bent in a cylinder plane, and has a holding cylinder portion having an upward opening 20 upward. 2 are formed. Above the holding cylinder 2, hook cylinders 3, 3 having both ends extending and curved inward and having downward hooks 30, 30 are provided.

The holding cylinder 2 has one spiral (1 pitch).
With a somewhat smaller number of turns, the lower part has a diameter equal to or greater than the diameter of the cable K to be suspended (40 m in this example).
m) is set in the semi-cylindrical portion 21. The upper part of the holding cylinder part 2 has a flat plate shape, and is a continuous part 22 to the hooking cylinder parts 3.

As shown in FIGS. 7 and 8, this cable hanger 1 holds the cable K with an insulation coating having a diameter of about 35 mm in the holding tube 2 and holds the hooking tubes 3 and 3 with a diameter of about 10 mm. It is attached by hooking on the messenger wire W. The wire W is previously installed between the electric poles,
The cable K is suspended by a large number of cable hangers 1 at predetermined intervals.

The width A of the strip 11 forming the holding cylinder 2 is 1
The pitch length P is smaller than the pitch length P, and the hooking tubular portions 3 and 3 are provided in series with a gap B (5 mm in this embodiment) in the length direction of the cable K. A resin layer 23 made of vinyl chloride is formed on the surface of the strip 11 that constitutes the holding cylinder 2. The resin layer 23 is
Prevents the metal surface or end of the holding tube from damaging the cable jacket. The resin layer 23 can be formed by dipping, spraying, pasting or the like. As the resin material, vinyl chloride, polyamide, etc., which have excellent weather resistance, are suitable.

The hooking cylinder portions 3 and 3 are continuous portions 22 and 22.
And a semi-cylindrical surface portion 31, 31 having a downward hooking port 30 opened to the inside. The tips of the semi-cylindrical surface portions 31, 31 are extended to be bent back portions 32, 32 that act as wire guide surfaces when hooking the wire on the semi-cylindrical surface portions 31, 31.

In this embodiment, the relative positions of the centers of the hooking tube portions 3 and 3 are angle α = with respect to the center of the holding tube portion 2.
It is set at a position of 60 degrees, and the distance L between the central axes of the hooks 3 and 3 is 63 mm. As a result, the two cylindrical surfaces 34, 3 located inside the two hooks 3, 3
4 acts as a sliding surface when it abuts on the lower portion of the cable K and facilitates insertion of the cable K. Note that α and L are appropriately determined depending on the diameter of the holding cylinder portion, the diameter of the hooking cylinder portions 3 and 3, the plate thickness and width of the leaf spring, and the like.

3 and 4 show a method of manufacturing the cable hanger 1. As shown in FIG. 3A, while the strip plate 11 is pushed out by the feed roller 1A, the columnar fixed core 1B and the coiling tool 1C are used to extrude the strip plate 11B.
Is manufactured. At this time, a gap of 5 mm is formed between the strips using the pitch tool 1D.
The spirally wound cylindrical body 12 may be manufactured while rotating the core metal 1B.

Next, by using the mold 1E shown in FIG. 3C, the spirally wound cylindrical body 12 has a semi-cylindrical portion 21 having a large diameter (diameter 40 mm) on one end side and a small diameter on the other end side. The semi-cylindrical portion 13 (diameter 20 mm) is press-molded into an oblong cylindrical shape to produce an oblong cylindrical body 14 as shown in FIG. In addition, by using the NC machine tool, it is also possible to directly manufacture the eccentric cylinder 14 shown in FIG. 3D in the step shown in FIG. 3A. The press molding shown in (c) of FIG. 3 becomes unnecessary.

The oblong cylindrical body 14 is formed by the cutter jig 1K shown in FIG. 4B as shown in FIG.
The cable hanger blank 10 is manufactured by forming the upward opening 20 and the two hooks 3 and 3 and separating them. Note that this manufacturing process may be a plurality of processes.

Next, as shown in FIGS. 4C and 4D, when the size of the upward opening 20 of the cable hanger material 10 is small, it is expanded by the expanding jig 1L as necessary. To form the cable hanger blank 10 having the upward opening 20, and thereafter, heat treatment such as low temperature annealing (removal of processing residual strain during molding), aging treatment and quenching treatment is performed. Furthermore, by immersing the lower part of the cable hanger material 10 in liquid phase resin, the resin layer 2 shown in FIGS.
The cable hanger 1 with 3 is manufactured.

FIG. 5 shows the wire W by the cable hanger 1.
Robot 4 used for automatically suspending the cable K on the
Is shown. The robot 4 has a vertically long body 41 and is movably and detachably hung on a messenger wire W stretched between utility poles. A pulley 42 is mounted on the upper portion of the body 41, and a longitudinally elongated space 44 having a lateral communication port 43 is provided in an intermediate portion of the body 41. The shapes of the body 41 and the space 44 are appropriately determined according to the application.

On the rear surface 4A of the body 41, an upper arm 5 having a downward hand 51 is provided at an upper portion, and a lower arm 6 having an upward hand 61 is provided at a lower portion so as to face the downward hand 51. There is. Behind the lower arm 6, a cassette 7 of the cable hanger 1 is attached in the horizontal direction. The downward hand 51 has a guide surface 52, which is a downward parabolic surface.
Has a holding surface 62 which is an upward semi-cylindrical surface.

In this embodiment, the guide surface 52 of the downward hand 51 is composed of a front guide surface 53 and a rear guide surface 54, which are formed so that their centers are displaced from each other by a certain amount (for example, 5 mm). When the two hooking openings 30, 30 shown are aligned with each other, the two hooking openings 30, 30 are surely aligned with each other. A large number of cable hangers 1 are accommodated in the cassette 7 in series with the upward opening 20 facing upward, and are sequentially supplied to the upward hand 61.

6 (a) to 6 (e) show the automatic mounting work of the cable K by the robot 4. As shown in FIG. First, as shown in (a), the robot 4 is lifted to the position of the wire W by a lift mechanism (not shown). Next, the side communication port 43
From the wire 41 to the empty space 44 of the body 41 and the cable K
Through. At the same time, the cable hanger 1 is pushed out from the cassette 7 and held by the upward hand 61.

Next, as shown in (B), when the lower arm 6 is raised, the cable K is accommodated in the holding tube portion 2 through the upward opening 20. When the lower arm 6 is further raised, the upper opening 20 is further raised.
The wire W penetrates into the holding cylinder portion 2.

Next, as shown in (c), when the upper arm 5 is lowered, the guide surface 52 of the downward hand 51 and the semi-cylindrical surface portions 31, 31 of the hooking tubular portions 3, 3 slide, so that The hooking cylinders 3 and 3 are displaced in a direction of narrowing the upward opening 20, the gap B between the hooking cylinders 3 and 3 is narrowed, and the center lines are substantially aligned. It is desirable that the degree of compression be set at a position where the two downward hook holes 30, 30 substantially coincide with each other. In the case where the bent portions 32 are provided, the widths of the tips of the two bent portions 32 are maximized.

In this state, as shown in (d), when the upper arm 5 and the lower arm 6 are synchronously displaced downward, 2
The messenger wire W is pushed into the hooking tube parts 3, 3 from the two downward hooking ports 30, 30. Thereafter, the lower arm 6 and the upper arm 5 are returned to their original positions as shown in FIG. Further, the robot 4 is moved by a predetermined distance along the wire W, and (a) to (e) are repeated.

FIGS. 7A to 7C show a cable hanger according to another embodiment. The cable hanger 1a shown in (a) has hook ports 30 and 3 of the hook tube parts 3 and 3.
Inward projections 25, 25 are formed at 0. In the cable hanger 1b shown in (b), inward projections 26, 26 are formed at the hooking openings 30, 30 of the hooking tubular portions 3, 3. In these examples, the effect of preventing the wire W fitted in the hooking tubular portions 3 and 3 from coming off is great.

The cable hanger 1c shown in FIG. 7C.
Has a configuration in which the holding tube portions 2 are connected by a hinge 27 so that the upward opening 20 can be easily opened and closed. In the case of this embodiment, the spring load in the expanding direction of the upward opening 20 can be reduced in the state where the hooking tubular portions 3 and 3 are fitted onto the cable K, and the hanger portion generated stress in the cable hanger attached state can be reduced. The excessive load on the messenger wire can be reduced. In addition, there is an advantage that the fitting work of the hook openings 30, 30 can be easily performed (with a low load) in the mounting process of (b) and (c) of FIG. 6.

FIG. 8 shows a cable hanger mounting device according to another embodiment. In this embodiment, a pair of claws 6 facing each other in the front-rear direction is provided at the center of the upward arm 61 of the lower arm 6.
4, 64 are provided. The claws 64, 64 have opposed cutouts 65, 65, and are rotatably provided around the back stop points 66, 66. The opposed cutouts 65, 6 are provided.
By detachably grasping the lower part of the cable hanger 1 between 5 and 5, the function of preventing the cable hanger 1 from falling off the holding surface 62 is exerted.

[Brief description of drawings]

FIG. 1 is a perspective view of a cable hanger.

FIG. 2 is a three side view of the cable hanger.

FIG. 3 is a manufacturing process diagram of a cable hanger.

FIG. 4 is a manufacturing process diagram of the cable hanger.

FIG. 5 is a front view and a cross-sectional view of a robot for automatically attaching a cable hanger.

FIG. 6 is a mounting work diagram of a cable hanger.

FIG. 7 is a perspective view of a cable hanger according to another embodiment.

FIG. 8 is a front view of a main part of a cable hanger mounting device according to another embodiment.

[Explanation of symbols]

 1, 1a, 1b, 1c Cable hanger 2 Holding cylinder part 3 Hooking cylinder part 4 Robot 5 Upper arm 6 Lower arm 11 Strip plate 20 Upward opening 23 Resin layer 27 Hinge 30 Downward hooking port 32 Bending part 41 Body 44 Vacancy 51 Downward hand 52 Guide surface 61 Upward hand 62 Holding surface 71 Supply mechanism K cable W Messenger wire

Claims (5)

[Claims] 1. A cable spring-made cable hanger for suspending a cable on a messenger wire, comprising: a holding cylinder portion of the cable, which is formed by bending a strip plate in a spiral shape and has an upward opening; and a holding cylinder portion of the holding cylinder portion. Both ends are extended and bent inwardly, have a downward hooking port, and have two hooking cylindrical portions for the messenger wire that are provided in series in the axial direction of the messenger wire, A cable hanger made of a leaf spring, characterized in that the gap between the two hooking tubular portions in the direction orthogonal to the cable is equal to or larger than the diameter of the cable. 2. The hook tube portion according to claim 1, wherein the hook tubular portion has a bent back portion extended in a direction of expanding the hooking opening, and the bent back portion has the wire passing through the upward opening. A leaf spring cable hanger, which is a guide surface for guiding the wire to the hook later. 3. The cable hanger made of a leaf spring according to claim 1, wherein a hinge is provided at a lower portion of the hooking tubular portion. 4. A cable hanger mounting device for suspending a cable on a wire stretched between electric poles using the cable hanger according to claim 1, wherein the cable and the wire are inserted. A downward hand is provided with a body provided with a void in the wire direction and movably mounted on the wire, and a guide surface provided at a position facing the void of the body and smoothly expanding downward. An upper arm for moving up and down, a lower arm having an upward hand facing the guide surface and having a holding surface for holding the holding tubular portion of the cable hanger, and a supply mechanism for supplying the cable hanger to the upward hand. And a cable hanger mounting device including the upper arm, the lower arm, and a control device for the supply mechanism. 5. A cable hanger mounting method for suspending a cable on a wire stretched between utility poles by the cable hanger using the cable hanger mounting device according to claim 4, wherein the wire and the cable are While passing through the void of the body, the body is movably installed on the wire, the cable hanger is held by the upward hand by the supply mechanism, the lower arm is raised, and the cable from the upward opening. The cable and the wire are fitted into the holding cylinder portion, the upper arm is lowered, and the guide faces substantially match the hooking openings of the two hooking cylinder portions, and in this state, the upper arm and the lower arm are moved downward. Synchronously displacing the two downwardly facing hooks that are almost in line Cable hanger mounting method characterized by pressing the Njawaiya to the two hooking cylindrical portion.