JP2001145242A - Fixture for telegraph cable protection cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixture which makes it possible to easily and firmly fix a protection cover on a messenger wire with a single motion. SOLUTION: A fixture 1 is for fixing a protection cover 14 along a messenger wire 11 which protection cover 14 covers the messenger wire 11 and a telegraph cable 12 threaded along the messenger wire 11 so that the protection cover will not be displaced. The fixture comprises an openable half-split cylindrical body 2 to be fit onto the messenger wire 11, anchoring portions 8 and 9 that keep the half-split cylindrical body 2 in closed state, and an engaging means 3 to be engaged with the protection cover 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for fixing a protective cover for covering and protecting a messenger wire and a telegraph cable laid along the messenger wire to the messenger wire.

[0002]

2. Description of the Related Art Conventionally, for example, a telegraph cable 101 installed between telephone poles is, as shown in FIG.
It is made to be suspended and supported via 03. By the way, at a place where the telegraph cable 101 is erected close to the construction site of a roadside tree or a building, the telegraph cable 101 is protected by covering with a protective cover 104 in order to prevent the twig swaying in the wind and a crane truck from being scratched. I have to. The protective cover 104 is likely to shift when it receives wind pressure, and may be exposed without being able to protect important points. Therefore, the binding wire 106 is inserted into a through hole 105 formed through the end of the protective cover 104. Through this binding line 1
06 around the messenger wire 102 and the telegraph cable 101 in multiple layers.
4 is fixed.

[0003]

However, in the method of fixing the protective cover 104, since the binding wire 106 is wound multiple times, the work is troublesome and the efficiency is low, and the messenger wire 10 is not used.
Even if the binding wire 106 is tightly wound around the wire 2 and the telegraph cable 101, the winding tends to be insufficient in some cases, and the fastening force may be lost due to loosening of the winding over time. Therefore, there is a problem that the protective cover 104 is displaced from a predetermined position when it is swept by the wind and cannot protect a necessary portion, so that the initial purpose cannot be achieved.

Accordingly, the present invention has been made to solve the above-mentioned problem, and a telecommunication cable protective cover can be easily fixed to a messenger wire with a single touch without any displacement. It is intended to provide a tool.

[0005]

In order to achieve the above object, a fixing device for a telegraph cable protective cover according to the present invention comprises:
A fixing tool for fixing a protective cover covering a messenger wire and a telegraph cable laid along the messenger wire so as not to be displaced along the messenger wire, wherein the fixing cover is openable and closable to be fitted to the messenger wire. A split cylindrical body, a locking portion for holding the half-split cylindrical body in a closed state, and an engagement means for engaging with the protective cover are provided, thereby preventing unnecessary displacement of the protective cover. .

Further, as the engagement means, for example, there is an engagement projection which is inserted into and engaged with an engagement hole provided in the protective cover, so that the protective cover can be easily and securely fixed. In addition, other means may be used as the engagement means, such as using a ring that is inserted into the engagement hole of the protective cover by attaching it to a fixture.

Further, if a ridge is provided on the inner peripheral surface of the half-split cylinder to press against the outer peripheral surface of the messenger wire, the protective cover can be more reliably fixed by the ridge.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a fixing device for a telegraph cable protection cover according to the present invention. FIG. 1 is a perspective view of the fixture, and FIG. 2 is a sectional view of the same. The fixing tool 1 is formed of a polyethylene resin mixed with carbon, and includes an openable and closable half cylinder 2 obtained by dividing an upper portion of a short cylinder along an axial direction. Engagement projections 3 as engagement means protruding upward are arranged side by side in close proximity to each other. The engagement protrusion 3
A shaft 6 having a columnar shape is connected to the projecting piece 4 connected to the divided end via a flange 5 provided on the outer peripheral surface thereof, and a base end thereof is provided at an upper end of the shaft 6. The engaging conical portion 7 having a diameter larger than that of the shaft portion 6 and having a gooseneck shape is also provided. Projecting pieces 8 facing inward with different vertical positions are opposed to each other on the inner sides of the engaging projections 3, and engage with each other at the tips of these projecting pieces 8 with the divided ends closed. A locking claw 9 as a locking portion to be obtained is provided. The gap between the two protruding pieces 4 is slightly wider than the space between the two shaft portions 6 because the protruding pieces 8 protrude. Further, a plurality of ridges 10 substantially parallel to the axial direction are provided at equal intervals on the inner peripheral surface of the half cylinder 2.

The fixing device of the telecommunication cable protective cover according to the present invention has the above-described configuration. Next, a method of using the fixing device 1 will be described. In FIG. 3, reference numeral 11 denotes a messenger wire stretched between telephone poles (not shown). A telegraph cable 12 is arranged along the lower side of the messenger wire. 12 are supported. Reference numeral 14 denotes a protective cover attached to protect the telegraph cable 12 together with the messenger wire 11. The protective cover 14 is made of synthetic resin, the lower side of the main body tube 14a is divided in the axial direction, and a pair of protruding pieces 15 are provided at the divided edges so as to be opened at the divided ends. It has power. Further, an engagement hole 16 through which the engagement protrusion 3 is inserted from below is provided at an upper portion of the body tube 14a near the end thereof.

The protective cover 14 opens the projecting pieces 15 outwardly, inserts the messenger wire 11 and the telegraph cable 12 through the gap between the expanded divided ends, and faces the projecting pieces 15 as shown in FIG. Mounting hole 1 opened
The rivet 18 is inserted through the rivet 7 and attached. Then, near the end of the protective cover 14, each locking projection 3 is expanded and the half-split cylinder 2 is expanded to fix the fixture 1 to the messenger wire 1.
1 Next, the engaging projections 3 are narrowed, the locking claws 9 are locked with each other, and the fixture 1 is fixed to the messenger wire 11. A protective cover 14 is attached to this fixture 1.
And the engaging projections 3 are pushed into the engaging holes 16 from below, so that the engaging cones 7 are inserted into the engaging holes 16 and the shaft portions 6 are positioned in the engaging holes 16. The protective cover 14 can be fixed to the cover 11 so as not to shift. However, if there is a slight gap between the inner peripheral surface of the half-cylindrical body 2 and the messenger wire 11, there is a possibility that play will occur and the fixture 1 will move from the messenger wire 11, Protective cover 14
Is subjected to wind pressure, a force is applied to the fixture 1 so as to tilt the engagement projection 3 side about the half-cylindrical cylinder 2, so that a so-called rolling action acts, thereby fixing the protective cover 14 so as not to shift. it can.

Further, the half cylindrical body 2 fitted to the messenger wire 11 is provided with a plurality of ridges 10 parallel to the messenger wire 11 on the inner peripheral surface. There is no backlash due to the gap by pressing against the surface, and the fixture 1 can be firmly fixed to the messenger wire 11.

FIG. 5 shows a state in which cable hangers 19 are attached to the messenger wires 11 at predetermined intervals, and the telegraph cables 12 are suspended from the respective cable hangers 19 and supported. Of course, the fixing device 1 of the present invention can be used even in the protective cover 14 attached to protect the communication cable 11 and the telegraph cable 12.

[0013]

As described above, the fixing device of the telegraph cable protection cover according to the present invention is such that the half cylinder is fitted to the messenger wire and the engagement projection is engaged with the engagement hole of the protection cover. Thus, the work of attaching the protective cover is completed, so that the work is extremely simple and quick, and the work efficiency is improved. Moreover, the protective cover can be fixed so as not to shift. Further, since the mounting work is simple, the protection cover can be securely and safely fixed even at a high place. Further, since the fixture has a simple structure and can be easily formed by integral molding of a synthetic resin, there is an advantage that the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fixture according to the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a perspective view of the same use state.

FIG. 4 is a sectional view of the same.

FIG. 5 is a perspective view showing an example in which a fixing tool is used for a protective cover that covers a telegraph cable suspended by a cable hanger.

FIG. 6 is a perspective view showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing device 2 Half cylinder 3 Engagement means (engagement projection) 8 Engagement part (projection piece) 9 Engagement part (engagement claw) 10 Ridge 11 Messenger wire 12 Telegraph cable 14 Protective cover 16 Engagement hole

Claims (3)

[Claims] 1. A fixing device for fixing a protective cover for covering a messenger wire and a telegraph cable laid along the messenger wire so as not to be displaced along the messenger wire. A telescopic cable protective cover, comprising: an openable and closable half-cylindrical body, a locking portion for holding the half-cylindrical body in a closed state, and engaging means for engaging with the protective cover. Fixture. 2. The fixing device for a telegraph cable protective cover according to claim 1, wherein said engaging means is an engaging projection inserted into and engaged with an engaging hole provided in the protective cover. 3. The fixing device for a telegraph cable protective cover according to claim 1, wherein a ridge is provided on an inner peripheral surface of the half-split cylinder to press against an outer peripheral surface of the messenger wire.