JPS644270Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an improvement of a type of come-along in which the electric wire is forcibly gripped by a cam structure when the electric wire is gripped by the wedge of the come-along.

[Background technology and problems]

A come-along was proposed in Utility Model Application No. 57-92055 (Utility Model Publication No. 62-33477) in which the wedge of the come-along was configured to forcibly hold an electric wire.

In this come-along, if there is foreign matter such as sand between the inside and outside surfaces of the wedge, slippage will occur between the wedge and the wire before the wedge is completely closed, creating a dangerous situation. This was done to prevent this from occurring.

Here, the conventional come-along will be explained with reference to FIG. 1, FIG. 2, and FIG. 3.

Figure 1 shows a come-along attached to a wire.
FIG. 2 is a front view, and FIG. 3 is a side view, partially in section. In the figure, 1 is a cylindrical come-along main body, and an inner surface 9 is partially tapered.

2, 2' are wedges, and the wedges 2, 2' are inserted into the inner surface 9 of the main body 1, and the deeper the insertion, the more the wedges 2, 2'
The wire holding hole formed on the mating surface has a reduced diameter to tighten the wire, and 3' is a pin, which is formed at one end of the handle 4 at the ear protruding from the main body 1. The handle 4 is connected to the main body 1 so that the end face of the cam structure 8 facing the end face of the wedges 2, 2'. The cam structure 8 is bifurcated at the tip of the handle 4, and the electric wire 6 is configured to pass between the two.

Reference numeral 5 denotes a wedge punching rod, one end of which is rotatably attached to the lower surface of the main body 1 by a support pin 3, and the support pin 3'' According to
It is engaged with the wedge 2, the tip of which extends in the lateral direction of the main body 1.

7 is a taper pin, 7' is a straight pin, and the main body 1 is constructed so that it can be opened and closed in the longitudinal direction by the straight pin 7', and by inserting the taper pin 7, , the main body 1 can be placed in a closed state.

Open the main body 1, fit the electric wire 6 into the wire holding hole inside the wedges 2, 2', and tighten the main body 1 with the taper pin 7.
When closed, the main body 1 is held by the electric wire 6, and the electric wire 6
You can slide on it.

Here, when the wire attached to one end of the handle 4 is pulled with a winch or the like, the handle 4 rotates around the connecting pin 3', and the end surface of the cam structure 8 formed at the end of the handle 4 pulls the electric wire 6. At the same time, the opposing end faces of the wedges 2, 2' are pressed to push the wedges 2, 2' into the inner surface of the main body 1, until the wedges 2, 2' stably grip the electric wire 6.

Conversely, if you pull the wedge puller 5 in the same direction as the handle 4, the wedge puller 5 will be engaged with the support pin 3'' that is engaged with the wedge 2, with the support pin 3 as the axis. Since a certain wedge extraction rod 5 is rotated, the wedge 2 is pushed out from the main body 1, the wedges 2 and 2' are loosened, and the grip on the electric wire 6 is released.

If the come-along with the structure described above is used, it is possible to grip the electric wire almost perfectly, but even if the handle 4 is pulled with a rope, such as when abnormal grease is attached to the electric wire, the cam Since the main body 1 may slip on the electric wire 6 when the mechanism 8 is not fully closed, a device that operates more safely and reliably is desired.

[Disclosure of invention]

Because the problems mentioned above may occur,
In order to make the gripping operation more reliable, the present invention disclosed in Jitsugan No. 1987-92055,
By cleverly utilizing the pull-out rod, which was previously used only for pulling out wedges, a single operating rod can be used for both gripping and release of wires. This allows the wedge to be pushed into the inner surface of the main body more reliably.

The present invention will be explained below with reference to embodiments shown in the drawings. FIG. 4 is a front view of the embodiment of the present invention, FIG. 5 is a side view of the embodiment of FIG. 4, and FIG. 6 is a partial bottom view. The same parts as in FIGS. 1 and 2 are designated by the same reference numerals.

The come-along body 1, which has a cylindrical shape and has a tapered surface on its inner surface, can be opened and closed by a straight pin 7' in the direction in which the electric wire is held. 1 can be integrated. 2 and 2' are wedges that are slidably held on the inner surface 9 of the main body 1, and wire holding holes are formed in the mating surfaces of the wedges 2 and 2'. FIGS. 7A and 7B show side views of examples of the wedges 2 and 2', respectively.

On the mating surfaces of the wedges 2 and 2', recesses 19 and 19' are formed at the diagonal ends of the mating surfaces of the wedges 2 and the wedges 2' so as to engage with the mating surfaces of the wedges 2'. Convex portions 20, 20' are formed at the diagonal ends of the mating surfaces of 2' for the wedge 2, corresponding to the concave portions 19, 19', and engagement between the concave portions and the convex portions causes the wedge 2 and the wedge to 2' slides integrally within the main body. The wedges 2, 2' can slide on the partially tapered inner surface of the main body 1, and when sliding in the direction of the arrow, the diameter of the holding hole is reduced to grip the electric wire. In FIG. 5, the wedges 2 and 2' are shown in a reduced diameter state.

4 is a handle having a cam structure 8 at one end that presses the wedges 2, 2'; It is opposed to the end surfaces of the wedges 2, 2' and is rotatably supported by a connecting pin 3'.
The cam structure 8 is formed into two prongs, and the electric wire passes between the two prongs, so that the electric wire and the cam structure 8 do not interfere with each other when the handle 4 grips the electric wire. It's summery.

Reference numeral 13 denotes an operation rod having a mechanism that is different from the wedge extraction rod 5 shown in FIG. 3 and is capable of gripping operation in addition to wedge extraction operation.

As shown in FIG. 6, the operating rod 13 has at one end a connecting portion of a rope for releasing the grip on the electric wire;
For example, it has a hole 14, and the other end has a connection portion for a rope for gripping operation, which will be described later, for example, a hole 15.

The figure shows that the operating rod 13 is attached to the lower surface of the main body 1, and 16 is a long hole formed in the main body 1 in the direction of movement of the wedge 2. It has reached the inside of 1. Through this long hole 16, the operating rod 13 and the wedge 2 are engaged with each other by a screw 17 at a suitable intermediate position in the length direction of the operating rod 13, and between this engagement point and the hole 15, 1, the operating rod 13 is engaged by a screw 18, and the screw 17 is a screw for attaching and detaching the wedge 2.
The wedge 2 is engaged with the main body 1 to prevent it from coming off, and the screw 21 (Figs. 4 and 5) has the same length on the upper side as the elongated hole 16 on the lower side of the main body 1, although not shown. It engages with the wedge 2' through a hole in the direction, protrudes from the surface of the main body 1, and prevents the wedge 2' from coming off.

If the width of the elongated hole 16 is set to an appropriate width for the screw 17, the operating rod 13 can be pulled and rotated using the screw 18 as a fulcrum in the direction shown by the arrow. If the rope is pulled in the direction of the arrow, the wedge 2 will be pushed into the main body 1, thereby performing a gripping operation on the wire, and if the rope connected to the hole 14 is pulled in the direction of the arrow, the wedge 2 will be pushed into the main body 1. , a wedge release operation similar to that shown in FIG. 1 can be performed.

In particular, in the case of the present invention, the electric wire can be gripped by operating the cam structure 8 with the rope connected to the handle 4 before or simultaneously with the operation of the operating rod 13, and the gripping operation is performed from a remote location. It can be made extremely reliable and safe.

〔effect〕

The present invention is a slight but clever improvement over the conventional come-along, making it possible to overcome the slippage caused by grease attached to the wire and grip the wire. It is an extremely practical device.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are an external view, a front view, and a side view showing an example of a previously proposed come-along.
4, 5, and 6 are a front view, a side view, and a partial bottom view of an embodiment of the present invention. Figures 7A and 7B show examples of wedges. 1...Body, 2, 2'...Wedge, 3'...Connecting pin, 4...Handle, 5...Wedge removal bar, 6...Electric wire,
7... Taper pin, 7'... Straight pin,
8... Cam structure, 9... Inner surface of the main body, 10... Wire, 12... Ear part of the main body, 13... Operating rod,
14, 15... Holes, 16... Long holes on the bottom of the main body, 1
7, 18, 21...screw, 19...recess, 20...
...Protrusion.

Claims (1)

[Scope of utility model registration request] The end face of the wedge inserted into the inner surface of the come-along main body is opposed to the end face of the cam structure at the end of the handle supported by the main body, and a rope or the like is connected to both ends through a long hole formed in the main body in the direction of movement of the wedge. A come-along, wherein an operating rod having a section is engaged with a wedge at an intermediate position in the longitudinal direction of the operating rod, and the operating rod is engaged with the main body.