JPS645929Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to an inter-core expander used to expand the distance between the cores of a multi-core insulated wire, for example, when wiring the wire.

<Prior Art> In general, this type of multi-core insulated wire is known as a so-called multi-core insulated wire with support wires, in which support wires are attached to a plurality of wire cores twisted closely together. There is.

Now, when such multi-core insulated wires with support wires are strung over utility poles and branch wires are connected to each core of the wires, conventionally, as shown in FIG. A petal-shaped branch support 21 that holds each core a of the multi-core insulated wire in an expanded manner is fixed to a utility pole 23 via a tightening belt 22, and the wire cores a are separated by hand or some kind of tool. After expanding using the branch support tool 21, each wire core a is engaged and held in a plurality of support recesses 24 formed in the branch support tool 21, and then,
A method has been proposed in which the insulator at the end of each wire core a is peeled off to expose the conductor, the conductor of the branch wire 25 is connected to each conductor, and each connected portion is subjected to insulation treatment.

<Problems to be solved by the invention> By the way, in the case of the above-mentioned conventional example, since it is difficult to widen the space between each wire core a of the multi-core insulated wire with bare hands, the tip is actually formed in the shape of a squirrel. This is done by inserting a lever-like tool (not shown) between each wire core a.

However, with such a conventionally used tool, there is a risk that the insulator of each wire core a may be damaged. Further, the wire span work is usually carried out at a high place such as on the telephone pole 23, but when using the conventional tools, the worker is forced to take an unnatural posture, which is not desirable from a safety point of view.

Therefore, in order to improve this disadvantageous problem, for example, as shown in FIG. and the board 26 are provided with wire core hooking pieces 28 and 29 for hooking each core (not shown) of the multi-core insulated wire, so that when the sliding plate 27 is located at one end of the board 26, both wire cores are connected. Hook piece 28,
An inter-core expander configured such that the wires 29 are located on the same plane is considered. When performing the core-to-core expansion work of the multicore insulated wire using this expansion tool,
While pushing the two core hooking pieces 28 and 29 between two adjacent wire cores of the multi-core insulated wire, the grips 30 and 29 provided on the base plate 26 and the sliding plate 27,
31 and bring both the grips 30, 31 closer together, the core hooking piece 28 of the sliding plate 27 is pulled up, and thereby both the core hooking pieces 28, 31 are pulled up.
Expand the distance between adjacent wire centers hooked to 29.

However, even in the case of this improved expander, the distance between the grips 30 and 31 must be determined based on the size of the palm of the hand, which limits the range of expandable length of the core distance. In addition, since the expansion force exerted by both core hooking pieces 28 and 29 does not exceed the gripping force, a large gripping force is required for operation, and when an excessive expansion force is required, it is difficult to operate with one hand. It is difficult to do so, and there are problems such as not being able to sufficiently avoid the dangers of working at heights.

In view of these conventional problems, the present invention has been developed to
The purpose is to improve work efficiency by enabling easy and safe expansion operation with one hand.

<Means for solving the problem> In order to achieve this purpose, this invention
The apparatus includes a support shaft, an operating handle formed by fixed and movable handle levers pivotally supported on the support shaft and cross-connected via the support shaft, and an actuating means pivotally connected to the support shaft. The actuating means has a ratchet gear and one wire core hooking piece that interlocks with the ratchet gear, and the movable handle lever is equipped with a ratchet pawl that engages with the ratchet gear and rotates the ratchet gear in only one direction. , the fixed handle lever is equipped with a reversal prevention pawl for preventing the ratchet gear from reversing, and is also connected with the other wire core hook piece, and the one wire core hook piece is configured to rotate when the operating handle is not operated. positioned on the same plane as the other wire core hooking piece,
By repeatedly operating the movable handle lever toward and away from the fixed handle lever, the ratchet gear is continuously rotated in one direction, thereby separating the one core hooking piece from the other core hooking piece. It rotates in the direction.

<Example> Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 is a partially cutaway side view of this embodiment.
FIG. 2 is a sectional view taken along the cutting line - in FIG. 1. In these figures, the core expander of this embodiment includes a support shaft 1, an operation handle 2, and an actuating means 3, and the support shaft 1 has a square shaft portion 4 and a shaft portion 4 on both sides of the shaft portion 4. It has circular shaft portions 5, 5 formed therein. The operating handle 2 is composed of two handle levers 6, 7 on a fixed side and a movable side which are pivotally supported on the support shaft 1 and are cross-connected via the support shaft 1, and both handle levers 6, 7 are arranged on a circular shaft. It is rotatably supported by the parts 5, 5. The actuating means 3 includes a pair of left and right ratchet gears 8, 8 and actuating plates 9, 9 pivotally mounted on the square shaft portion 4;
It has one wire core hooking piece 10 extending from the actuating plates 9,9.

The fixed handle lever 6 has a grip portion 6a and a disc-shaped bearing portion 6b connected to the grip portion 6a, and a reversal prevention pawl 11 for preventing the ratchet gears 8, 8 from reversing is attached to the bearing portion 6b. At the same time, the other wire core hooking piece 12 is extended from the bearing portion 6b. The reverse rotation prevention claw 11 is biased in the engagement direction by a spring means (not shown), and has an engagement release lever 13 that is coaxially connected. The movable handle lever 7 has a grip portion 7a and a bearing portion 7b configured similarly to the fixed handle lever 6, and engages with the ratchet gears 8, 8 to rotate each ratchet gear 8, 8 in only one direction. A ratchet pawl 14 is attached. In addition,
This ratchet pawl 14 is also biased in the engaging direction by a spring means (not shown). Further, a liner is interposed between the bearing portion 7b of the movable handle lever 7 and the actuating plate 9 to reduce friction between the two.

The other wire core hooking piece 12 is attached to both handle levers 6,
It is arranged in an inclined state with respect to the grip portions 6a, 7a of 7, and one wire core hooking piece 10 is located in the center.
It has a window 15 into which it fits. One of the core hooking pieces 10 is positioned on the same plane as the other core hooking piece 12 when the operation handle 2 is not operated. A hook return spiral spring 16 for returning both wire core hooks 10, 12 to non-operating positions is attached to the square shaft portion 4 between the ratchet gears 8, 8 via a bushing 17. Further, a lever return spring 18 is installed between the grip portions 6a, 7a of both handle levers 6, 7 to return both handle levers 6, 7 to the non-operating position after handle operation.

Now, when expanding the distance between the cores of a multi-core insulated wire using the expansion tool configured as described above, first, the core hooking pieces 10 and 12 located on the same plane are pushed and inserted between the adjacent cores. Then, the movable handle lever 7 of the operating handle 2 is repeatedly operated toward and away from the fixed handle lever 6. With this operation, the ratchet gears 8, 8 are moved to 1 by the ratchet pawl 14.
The operating plates 9, 9 interlock with the ratchet gears 8, 8 to rotate one core hooking piece 10 in a direction away from the other core hooking piece 12. The distance between the wire cores will be expanded.

In this case, the ratchet gears 8, 8 are advanced by a predetermined phase each time the handle levers are moved toward each other once, but the reverse rotation is prevented by the reverse rotation preventing pawl 11 at this phase displacement point. The position is maintained. As a result, the distance between the two core hooking pieces is maintained, and by continuously operating the operating handle 2, a desired amount of expansion can be obtained.

Furthermore, when the disengagement claw is operated to disengage the reverse rotation prevention claw 11 and the ratchet gears 8, 8 after completing the expansion operation between the wire cores, the bamboo shoot spring 18 for lever return and the spiral spiral for hook piece return are released. As the spring returns, the movable handle lever 7 and one wire core hooking piece 10 return to the non-operating position.

Incidentally, the actuation means 3, as shown in FIG.
Design changes such as integrating the ratchet gear 8 and the actuating plate 9 are possible.

<Effect of the invention> As described above, according to the invention, by repeatedly operating the operating handle, the ratchet gear is continuously rotated in one direction, and one wire core hooking piece that is interlocked with the ratchet gear is connected to the other wire. Since it moves in the direction away from the center hook piece,
The distance between the two core hooking pieces can be increased within the rotatable range of one of the core hooking pieces, and workability can be improved. Furthermore, by appropriately selecting the ratio between the length of the operating handle and the diameter of the ratchet gear, it is possible to easily widen the distance between the wire centers with a small operating force. Therefore, it is possible to work with one hand, and work at heights can be performed safely.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
Fig. 1 is a partially cutaway side view of this embodiment, Fig. 2 is a sectional view taken along the cutting line - in Fig. 1, and Fig.
FIG. 4 is a side view of an actuating means showing another embodiment of the present invention, FIG. 4 is a perspective view showing a branch support portion of a multi-core insulated wire with support wires, and FIG. 5 is a perspective view of a conventional example. DESCRIPTION OF SYMBOLS 1... Support shaft, 2... Operation handle, 3... Operating means, 6... Fixed handle lever, 7... Movable handle lever, 8... Ratchet gear, 10...
One wire core hooking piece, 11...Reverse rotation prevention claw, 12...
...The other wire core hooking piece, 14...Ratchet claw.

Claims (1)

[Scope of utility model registration request] The apparatus includes a support shaft, an operating handle formed by fixed and movable handle levers pivotally supported on the support shaft and cross-connected via the support shaft, and an actuating means pivotally connected to the support shaft. , the actuating means has a ratchet gear and one wire core hooking piece that interlocks with the ratchet gear, and the movable handle lever is equipped with a ratchet pawl that engages with the ratchet gear and rotates the ratchet gear in only one direction. The fixed handle lever is equipped with a reverse rotation preventing pawl that prevents the ratchet gear from reversing, and is connected to the other core hooking piece, and the one core hooking piece is connected to the non-operating state of the operating handle. The ratchet gear is positioned on the same plane as the other wire core hooking piece, and by repeatedly moving the movable handle lever toward and away from the fixed handle lever, the ratchet gear is continuously rotated in one direction. A core-to-wire core expanding tool, characterized in that the core hooking piece rotates in a direction away from the other core hooking piece.