JPH0626528Y2 - Electric cable winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an electric cable winding device used in a welding machine or other electric equipment.

[Conventional technology]

Conventionally, as an electric cable winding device of this type, for example, a sixth
The one in the figure is known.

In this conventional structure, the rotating shaft 2 is provided laterally on the machine body 1, the winding drum 3 is arranged on the rotating shaft 2, one external connecting portion 4 is provided on the winding drum 3, and the electric cable 5 One end is connected to this external connecting portion 4, the other external connecting portion 6 is arranged at the outer end of the electric cable 5, and the electric cable 5 is wound on the winding drum 3.
It is configured to be rolled up.

Then, at the time of welding work, the electric cable 5 is pulled out from the winding drum 3 by an appropriate length, the take-out cable 8 of the welding machine 7 is welded to the one external connection portion 4, and the other external connection portion 6 is welded. The holder cable 10 of the holder 9 will be connected.

[Problems to be solved by the device]

However, in the case of the above-mentioned conventional structure, one external connection portion 4 is disposed on the winding drum 3, and when the winding drum 3 is rotated while the extraction cable 8 is connected to this external connection portion 4, the extraction cable 8 is removed. As a result, the take-out cable 8 must be rotated without disconnecting the take-out cable 8 from the external connection portion 4, which has the disadvantage of degrading workability.

In order to prevent such twisting of the take-out cable, for example, as shown in Japanese Utility Model Laid-Open No. 60-96359, there is a structure in which a drum has a double structure to support an external connection portion in a conductive state. To prevent this, if the drum has a double structure, the conduction structure becomes defective. Generally, such an electric cable is also used in a welding machine, but during welding, a large direct current flows, and this conductive contact part causes a connection failure to generate an arc or generate heat, which is extremely dangerous. It is inferior in safety as a machine and cannot be put to practical use.

Therefore, the structure must be such that an arc does not occur even when a large direct current flows during such welding, and that a good conductive state can be achieved.

The present invention has a technical problem to provide an electric cable winding device that solves the above problems.

[Means for Solving the Problems]

The present invention is intended to solve these inconveniences, and its gist is to dispose a rotary shaft 2 on a machine body 1 and a winding drum 3 on the rotary shaft 2. In which the electric cable 5 is wound around the body 3, the body 1 of the rotating shaft 2
An inner connecting portion 13 to which the inner end of the electric cable 5 can be connected is provided in the inner portion, and a mounting hole for loosely fitting the terminal shaft 16 in the rotating shaft 2 from the outer end portion in the axial direction. 17 is formed, the terminal shaft 16 is freely rotatably fitted in the mounting hole 17, the external connection portion 4 is provided at the outer end portion of the terminal shaft 16, and the bottom surface portion 17a of the device hole 17 and the terminal shaft 16 are provided. An electric conductor 19 is interposed between the inner end of the electric conductor 19 and the inner end of the electric conductor so that the inner connecting portion 13 and the outer connecting portion 4 are electrically connected to each other via the electric conductor 19 and the terminal shaft 16. The electric cable winding device is characterized in that the conductor 19 is formed of a predetermined material.

[Action]

Even if the rotating shaft 2 rotates due to the rotation of the winding drum 3, the terminal shaft
The 16 can idle independently of it, and can also be at rest.

In addition, the internal connection portion 13 for connecting the inner end of the electric cable 5
The external connection portion 4 and the external connection portion 4 are electrically connected to each other through the terminal shaft 16 and the conductor 19, and the conductor 19 serving as a sliding contact portion by the rotation of the rotating shaft 2 is a separate body from the terminal shaft 16. And is in an elastic contact state in a state of being housed in the mounting hole 17 between the rotating shaft 2 of the internal connecting portion 13 and the terminal shaft 16 on the external connecting portion 4 side.
By forming 19 with a predetermined material, an arc is less likely to occur, and even if it does occur, the structure is extremely low in danger.

〔Example〕

 1 to 5 show an embodiment of the present invention.

The same reference numerals are used for the same mode parts as those of the conventional structure shown in FIG.

Reference numeral 1 denotes a machine body. In this case, two leg portions 1a are arranged opposite to the connection pipe 1b, and a handle portion 1c is provided between the upper portions of the left and right connection pipes 1b.

Reference numeral 2 is a rotating shaft, and the connecting pipes 1 on both left and right sides of the machine body 1
Bearings 1d are formed in b, the rotary shafts 2 are rotatably laterally provided on the respective bearings 1d, a handle 11 is fixed to the outer end of one rotary shaft 2, and one rotary shaft 2 and the other rotary shaft 2 are fixed. Rotation axis 2
A take-up drum 3 is installed between them, a shaft cylinder 3a is fixed to the take-up drum 3, and a plurality of split grooves 3b extending in the axial direction is provided on the shaft cylinder 3a.
And the winding drum 3 is fixed to the rotary shaft 2 by tightening the outer peripheral portion of the split groove 3b with the tightening ring 12, and the winding drum 3 is placed between the outer peripheral surface of the shaft cylinder 3a and the inner peripheral surface of the bearing portion 1d. The sliding portion is configured to rotate with respect to the machine body 1.

Reference numeral 13 denotes an internal connecting portion, in which a screw hole 14 is formed at the inner end of one of the rotary shafts 2, and the inner end of the electric cable 5 is attached to a mounting bolt.
It is fixed by 15.

Reference numeral 16 denotes a terminal shaft. One of the rotary shafts 2 has a mounting hole 17 formed therein, and the terminal shaft 16 is mounted in the mounting hole 17 in a freely rotatable manner.
The notch groove 18 is formed at the mounting tip (inner end) of the
A conductor 19 containing carbon as a main component is fitted into 18 so as to be slidable in the axial direction with the outer end portion (tip portion 19a) protruding, and the tip portion 19a of the conductor 19 is formed into a conical shape. The mounting hole
An elastic spring 20 for elastically contacting the conical bottom surface portion 17a of the conductor 17 and the tip end portion 19a of the conductor 19 is provided, and a mounting ring 21 for preventing the terminal shaft 16 from coming off is attached to the rotating shaft 2 with a screw 22. The rotary shaft 2 and the terminal shaft 16 can be electrically connected to each other via 19.

Reference numeral 4 denotes an external connecting portion, which has a threaded portion 16a formed on the outer end portion of the terminal shaft 16 and which is attached to the take-out cable 8 by a mounting nut 23.
Is to fix.

Reference numeral 24 denotes an insulating coating layer for obtaining an insulating state between the terminal shaft 16 and the winding drum 3.

25 is an insulating rubber, and 26 is an insulating rubber cover.

In this case, the conductor 19 has a copper powder weight of 86% and a carbon powder weight of 6%, and the powder is hardened with a solidifying agent of 8% by weight to obtain an apparent specific gravity of 6.20 to 6.60, hardness Hs of 5 to 10 and resistance. rate μΩ · cm3~7, bending strength kgf / cm ² 600~900
The temperature rise in the vicinity of the bearing 1d is 2 ° C to 3 ° C due to continuous energization of DC40 to 50V, 500A for 3 hours.
It has a composition that can be suppressed.

Since this embodiment has the above-mentioned configuration, one external connection portion 4
Even if the take-out cable 8 is connected to the terminal shaft 16 and the winding drum 3 is rotated in this state, the terminal shaft 16 can freely rotate with respect to the rotary shaft 2 and can rotate freely regardless of the rotation of the rotary shaft 2. Thus, one of the external connection portions 4 can be held stationary, and the winding drum 3 can be rotated while the take-out cable 8 is still connected, and the work efficiency can be improved accordingly.

The conductor 19 may be formed to have an appropriate composition to limit the allowable current.

[Effect of device]

According to the present invention, as described above, even when the winding drum is rotated, the terminal shaft is allowed to freely rotate with respect to the rotation shaft, and can rotate freely regardless of the rotation of the rotation shaft. It can be held in a stationary state, so that the electric cable can be pulled out while the take-out cable is connected to the external connection portion and the take-out cable is not twisted, and the work efficiency can be improved accordingly.

Moreover, according to the present invention, the internal connection portion for connecting the inner end of the electric cable and the external connection portion for connecting the extraction cable are electrically connected by the terminal shaft existing in the rotating shaft and the electric conductor, and the electric conductor is Because they are contacted in a suppressed state,
The electrical connection is good, and furthermore, since this conductor is provided as a separate body and accommodated in the mounting hole, a simple means of forming this conductor with an appropriate material as shown in the embodiment is used. , It is very practical for a welding machine that is used in a welding machine and is less likely to generate an arc even if a large direct current flows, and has little danger even if an arc occurs, and that has a highly safe and well connected state. It becomes an electric cable winding device.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is an overall perspective view, FIG. 2 is a side view thereof, and FIG. 3 is a partial sectional view thereof.
FIG. 4 is a partial perspective view thereof, FIG. 5 is a cross-sectional view taken along the line AA of FIG. 4, and FIG. 6 is a perspective view of a conventional structure. 1 ... Machine, 2 ... Rotation axis, 3 ... Winding drum, 4 ...
External connection part, 5 ... electric cable, 13 ... internal connection part,
16 …… Terminal shaft, 17 …… Mounting hole, 17a …… Bottom part, 19 ……
conductor.

Claims (1)

[Scope of utility model registration request] 1. A rotary shaft 2 is provided horizontally on a machine body 1, a winding drum 3 is arranged on the rotary shaft 2, and an electric cable 5 is wound around the winding drum 3. Internal connection part that can connect the inner end of the electric cable 5 to the inner part of the body 1
13 is provided, and a mounting hole 17 into which the terminal shaft 16 is freely rotatably fitted is formed on the rotary shaft 2 from the outer end portion in the axial direction, and the terminal shaft 16 is rotatably mounted in the mounting hole 17. Mating this terminal shaft 16
The external connection 4 is provided at the outer end of the
A conductor 19 is interposed between a and the inner end of the terminal shaft 16 in a resilient contact state, and the internal connecting portion 13 and the external connecting portion 4 are brought into a conductive state via the conductor 19 and the terminal shaft 16. An electric cable winding device characterized in that the electric conductor 19 is formed of a predetermined material.