JPH0544375U - Wire feeding device - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to prevent the drum 3 from coming off from the drum support shaft 11 more reliably and easily, and to improve reliability. [Structure] Provided is a retaining member 13 rotatable between a protruding position protruding from the outer peripheral surface of the drum supporting shaft 11 and a storing position accommodated in the drum supporting shaft 11, and the retaining member 13 is provided with a spring 14 Was urged toward the protruding position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire feeding device for feeding a wire wound around a drum, such as a welding wire feeding device for a welding machine.

[0002]

[Prior Art]

 4 is a front view showing an example of a conventional welding wire feeding device, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. In the figure, 1 is a frame, 2 is a cylindrical drum support shaft (insertion shaft) mounted on the frame 1, 3 is a drum rotatably penetrated by the drum support shaft 2, and 4 is a drum 3. The welding wire 5 serving as a wire rod is attached to the drum support shaft 2 to prevent the drum 3 from coming off the drum support shaft 2. The retainer metal 5 has a threaded portion. It is detachably attached to the drum support shaft 2 by screwing 5a.

Such a conventional welding wire feeding device is provided in an automatic or semi-automatic welding machine, and feeds the welding wire 4 wound around the drum 3 to the welding portion. A screw-type retaining metal 5 is attached to the drum support shaft 2 so that the drum 3 rotating by this feeding does not naturally come out of the drum support shaft 2 during welding. When the drum 3 is removed from the drum support shaft 2 for replacement or the like, the retaining metal member 5 may be removed from the drum support shaft 2.

[0004]

[Problems to be solved by the device]

 In the conventional welding wire feeding device configured as described above, the retaining metal fitting 5 is attached to and detached from the drum support shaft 2 by the screw portion 5a. May be forgotten to be reattached or the screw 5a may become loose and the retaining metal 5 may come off spontaneously during welding. As a result, the drum 3 may detach from the drum support shaft 2 during welding. There was a point.

The present invention has been made to solve the above-mentioned problems, and it is possible to more reliably and easily prevent the drum from coming off the drum support shaft, and to improve reliability. An object is to obtain a wire rod feeding device that can be improved.

[0006]

[Means for Solving the Problems]

 In the wire rod feeding device according to the present invention, a retaining member that is reciprocally movable between a protruding position protruding from the outer peripheral surface of the drum support shaft and a storage position housed in the drum support shaft is provided on the drum support shaft. The retaining member is biased toward the protruding position by a spring.

[0007]

[Action]

 In this invention, the retaining member prevents the drum from coming off at its protruding position, and the retaining member is released by moving the retaining member against the spring to the storage position, so that the drum can be attached to and detached from the drum support shaft. To do.

[0008]

【Example】

 An embodiment of this invention will be described below with reference to the drawings. 1 is a front view showing a welding wire feeder according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. 4 to 6 are designated by the same reference numerals, and the description thereof will be omitted.

In the drawing, reference numeral 11 denotes a cylindrical drum support shaft attached to the frame 1, and the drum support shaft 11 penetrates the drum 3 and rotatably supports the drum support shaft 11. An opening 11a is provided on the side surface of the drum support shaft 11. Reference numeral 12 is a rotary shaft provided in the drum support shaft 11 in a radial direction, and 13 is a retaining member (metal fitting) attached to the rotating shaft 12, and the retaining member 13 is shown in FIG. Thus, it is rotatable between the projecting position projecting from the opening 11a and the storage position (down position) stored in the drum support shaft 11.

Reference numeral 14 is a spring attached to the rotary shaft 12. One end of the spring 14 is engaged with the retaining member 13 and the other end is engaged with the inner wall surface of the drum support shaft 11. The retaining member 13 is constantly urged toward the protruding position. Reference numeral 15 is a stopper for lowering and positioning the retaining member 13 provided on the inner wall surface of the drum support shaft 11.

In the welding wire feeder as described above, when the drum 3 is mounted on the drum support shaft 11, the shaft hole of the drum 3 may be inserted into the drum support shaft 11 as it is. At this time, the retaining member 13 is pushed down by the end surface of the drum 3 and rotates against the spring 14 to the storage position. When the drum 3 passes, the retaining member 13 automatically rotates to the projecting position by the restoring force of the spring 14. This completes the mounting of the drum 3, and the retaining member 13 prevents the drum 3 from coming off the drum support shaft 11 during welding. When removing the drum 3 from the drum support shaft 11 for replacement or the like, the retaining member 13 may be pushed down with a finger until it comes into contact with the stopper 15, and the drum 3 may be pulled out.

In such a welding wire feeding device, it is not necessary to remove the retaining member 13 from the drum support shaft 11, and when the drum 3 is mounted, the retaining member 13 automatically rotates so that the drum 3 can be rotated. Since the removal of the drum 3 is prevented, the removal of the drum 3 from the drum support shaft 11 is prevented more reliably and easily, and the reliability is improved. In particular, since the welding wire feeding device is often used for welding work at a high place, the safety of the work is improved by more reliably preventing the drum 3 from coming off.

Although a coil spring is shown as the spring 14 in the above embodiment, it goes without saying that various other springs such as a leaf spring can be applied. Further, although the retaining member 13 is rotated in the above-described embodiment, it is sufficient that the retaining member 13 can be reciprocated between the projecting position and the storage position, and for example, a reciprocating slide member may be used. Further, although the welding wire feeding device is shown in the above embodiment, the wire is not limited to the welding wire 4 and may be, for example, another wire, an electric wire or a rope.

[0014]

[Effect of the device]

 As described above, in the wire rod feeding device of the present invention, the retaining member that is reciprocally movable between the projecting position projecting from the outer peripheral surface of the drum support shaft and the storage position housed in the drum support shaft is provided. Since the retaining member is provided on the support shaft and is biased toward the protruding position side by the spring, it is not necessary to remove the retaining member from the drum support shaft, and the retaining member automatically moves to the protruding position when the drum is mounted. It is possible to prevent the movement of the drum from coming off from the drum supporting shaft more reliably and easily, and it is possible to improve reliability.

[Brief description of drawings]

FIG. 1 is a front view showing a welding wire feeding device according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a front view showing an example of a conventional welding wire feeding device.

FIG. 5 is a side view of FIG.

6 is a cross-sectional view taken along line VI-VI in FIG.

[Explanation of symbols]

 3 Drum 4 Welding wire (wire material) 11 Drum support shaft 13 Fall prevention member 14 Spring

Claims (1)

[Scope of utility model registration request] 1. A drum support shaft, a drum around which a wire is wound and which is rotatably mounted on the drum support shaft, a protruding position protruding from an outer peripheral surface of the drum support shaft, and a drum support shaft housed in the drum support shaft. A retaining member that is reciprocally movable between the drum supporting shaft and the stored position, and that prevents the drum from coming off the drum supporting shaft at the projecting position; A wire feeding device, comprising: a spring for urging the wire toward the side.