JPH1029064A - Welding wire feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a weight/size of the device and to improve a working efficiency by arranging a control box having a printed board mounting a control circuit on the inner face of main body side plate of the wire feed device with excluding a spool shaft. SOLUTION: The wire feed device is provided with left/right side plates 1a, 1b, a front plate 4, bottom plate 5 and spool shaft 6 to which a welding wire is mounted, further, it is arranged with a control box 3 incorporating a printed board, on which a control circuit to execute wire feed control, is mounted, to the inner face of left side plate 1a with excluding on the axis of spool shaft 6. Further the printed board mounted with the control circuit for wire feed control is mounted on the side plate in the control box 3 opposite to the side plate 1a of main body of wire feed device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding wire feeder equipped with a control box having a printed circuit board on which a control circuit for controlling feed of a welding wire is mounted.

[0002]

2. Description of the Related Art In recent years, at a large welding site where movement is frequently performed, a printed circuit board mounted with a control circuit for controlling the feeding of a welding wire is often used in a welding wire feeding device. Therefore, miniaturization and weight reduction are desired. For example, a welding site where mobility is important includes a shipyard. Generally, the work site of a shipyard is complicated, and a welding worker working in it frequently moves with a welding wire feeding device, so that the welding wire feeding device is defeated, In some cases, a side plate of a wire feeding device for welding is hit, and as a result, a printed circuit board on which a control circuit is mounted is broken.

Further, the welding wire feeder needs a certain degree of waterproofness to protect a printed circuit board on which a control circuit is mounted.

Hereinafter, a conventional example in which a printed circuit board on which a control circuit is mounted is arranged in a welding wire feeder will be described.

First, as a first conventional example, a welding wire feeder in which a control box having a printed circuit board on which a control circuit is mounted is disposed so as to avoid the axis of a spool shaft will be described with reference to FIG.

In FIG. 3, reference numeral 40 denotes a front plate in the wire feeding direction; 50, a bottom plate; 30c, a control box containing a printed circuit board 20 on which a control circuit (not shown) is mounted;
0 is a top plate of the control box 30, 60 is a spool shaft, 70
Is a motor.

First, the case of the wire feeding device for welding is
The control box 30 is disposed in front of the bottom plate 50, and the control box 30 has a motor 70 for feeding a welding wire. A spool shaft 60 for placing the application wire is arranged.

The protection of the printed circuit board 20 having the above-described structure and having the control circuit mounted thereon will be described.

First, by making the sheet metal of the control box 30 thicker, it is difficult for the impact when the welding wire feeder is knocked down or hit during the movement to be transmitted to the printed circuit board 20.

Further, the control box top plate 30c is widened to prevent drip. Next, as Conventional Example 2, a welding wire feeder in which a control box is arranged on a spool shaft will be described with reference to FIGS. 4 (a) and 4 (b).

4 (a) and 4 (b), 10a is a left side plate, 10b is a right side plate, 20 is a printed circuit board on which a control circuit (not shown) is mounted, 31 is a control box, 31d is a right side plate of the control box. , 31c is a control box top plate, 41
Is a front plate in the wire feeding direction, 51 is a bottom plate, and 61 is a spool shaft.

First, a front plate 41 is disposed in front of a bottom plate 51, and a left plate 10a and a bottom plate 51 are provided on the left side of the bottom plate 51.
The right side plate 11b is disposed on the right side of the control box 31 and is flush with the right side plate of the control box 31. A control box right side plate 31d is arranged outside the right side plate 11b,
The spool shaft 61 is arranged on the right side plate 11b inside the case.

In the second prior art, protection of the printed circuit board 21 configured as described above and having a control circuit mounted thereon will be described.

First, in order to maintain the strength of the welding wire feeder itself, the left side plate 11a, the right side plate 11b, the right side plate 31d of the control box, the front plate 41, and the bottom plate 51 have thicknesses to protect them from impacts or the like. The strength is increased by thickening.

The control box 31 protects the printed circuit board 21 on which the control circuit is mounted from an impact, for example, by increasing the thickness of the right side plate 31d of the control box. I was improving the sex.

[0016]

However, in the above-mentioned conventional construction, the thickness of the control box is increased in order to protect the printed circuit board from impact, the space for arranging the printed circuit board is increased, and the drip-proof property is reduced. In order to achieve this, the upper surface of the control box has been devised, so that the wire feeding device becomes heavy or large, and the mobility at the welding work site is deteriorated.

Further, in the structure of the first conventional example, an impact when falling to the right or left side is easily received, and the impact when the impact is applied to the printed circuit board 20 on which the control circuit is mounted.
Easy to reach.

Further, the control box top plate 30c is also wide, so that the control box 30 becomes large, the volume of the wire feeding device itself becomes large, and it becomes inconvenient to carry.
He lacked mobility.

Further, in order to reduce the size of the case structure of the welding wire feeder, the motor 70 is connected to the control box 30.
Since the heat generated by the motor 70 itself when the motor 70 is driven, the printed circuit board 20 on which the control circuit is mounted
And deteriorated the temperature continuity of the control circuit.

Therefore, in the structure of the conventional example 1, the volume of the welding wire feeder itself is increased, the weight of the wire feeder is increased, the mobility is deteriorated, and the thermal characteristics are also deteriorated. Was.

In the conventional example 2, the printed circuit board 20 on which the control circuit is mounted is arranged on the right side plate 31d of the control box.
The weight force of the wire feeder itself with the welding wire near g was applied to the right side, and the printed circuit board 20 on which the control circuit was mounted was directly impacted through the control box right side plate 31d.

Further, since the spool shaft 61 is directly attached to the control box 31, when the wire feeder falls down in the direction of the spool shaft 61 on the left side of the wire feeder, the force received by the welding wire is applied to the spool. The impact is directly transmitted to the control box 31 via the shaft 61, and the impact is transmitted to the printed circuit board 20 on which the control circuit is mounted, causing a failure of the printed circuit board on which the control circuit is mounted.

An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to reduce the weight and size of a welding wire feeder and to protect a printed circuit board mounted on the wire feeder.

[0024]

In order to achieve this object, a welding wire feeding apparatus according to the present invention is arranged such that a control box having a printed circuit board on which a control circuit is mounted is disposed on a side plate of a case while avoiding a spool shaft. Things.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS With this configuration, a printed circuit board on which a control circuit of a welding wire feeder is mounted can be subjected to impact,
In addition to protecting the control box from water droplets, the thickness of the sheet metal of the control box can be reduced, so that downsizing, weight reduction, and protection of the printed circuit board can be performed.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
It is explained along. In FIG. 1, 1a is a left side plate of a case of a welding wire feeding device main body, 1b is a right side plate, 4 is a front plate in a welding wire feeding direction, 5 is a bottom plate, and 2 is a printed circuit board on which a control circuit is mounted. Reference numeral 3 denotes a control box in which the printed circuit board 2 on which the control circuit is mounted is mounted, and reference numeral 6 denotes a spool shaft disposed on the left side plate 1a behind the control box 5.

First, the front plate 4 is arranged at the front of the bottom plate 5, the left plate 1a is arranged on the left side of the bottom plate 5, and the right plate 1b is arranged on the right side. Further, a spool shaft 6 is arranged behind the inner surface of the left side plate 1a, and the control box 3 is arranged on the inner surface of the left side plate 1a so as to avoid the spool shaft 6.

FIG. 2 is an enlarged perspective view of the control box. In FIG. 2, reference numeral 2 denotes a printed circuit board on which a control circuit (not shown) is mounted, 3a denotes a right side plate of the control box, and 3b denotes a left side plate of the control box.

The control box top plate 3c is arranged on the upper surface of the control box left side plate 3b, and the printed circuit board 2 on which the control circuit is mounted is arranged on the control box right side plate 3a inside the control box 3.

The present embodiment is configured as described above.
The protection of the printed circuit board on which the control circuit is mounted will be described.

First, the control box 3 is disposed inside the case of the wire feeder main body, avoiding the spool shaft 6, and when the control box 3 falls to the right side of the case of the wire feeder main body, the impact received by the welding wire is as described above. The impact is transmitted to the left side plate 1 a on the axis of the spool shaft 6, and the direct impact is avoided on the printed circuit board 2.

A printed circuit board 2 on which a control circuit is mounted
Is arranged on the right side plate 3a of the control box inside the wire feeder away from the surface of the left side plate 3b of the control box,
When falling to the left side of the wire feeding device main body, a large impact when a welding wire of about 20 kg is attached is directly transmitted to the left side plate 1a, passes through the control box left side plate 3a, and passes through the control box right side plate 3a. A direct impact is not applied to the 3a side, so that a direct impact is not applied to the printed circuit board on which the control circuit is mounted.

As described above, the surface on which the printed circuit board 2 on which the control circuit is mounted is mounted so as not to be directly impacted, so that the printed circuit board 2 is protected from being impacted and protected. ing.

Next, since the control box top plate 3c is formed by bending the control box right plate 3a from the right plate 3a to an obtuse angle θ, water does not accumulate between the left plate 1a and the control box 3; The water droplets attached to the upper surface of the box 3 flow down in the direction of the right side plate 3a of the control box to prevent the water droplets from adhering to the printed circuit board 2 on which the control circuit is mounted, thereby increasing the drip-proof effect.

[0035]

As described above, in the wire feeding device for welding according to the present invention, the control box having the printed circuit board on which the control circuit is mounted is disposed on the inner surface of the body case side plate of the wire feeding device while avoiding the spool shaft. As a result, the weight and size can be reduced, and mobility can be exhibited at a welding site such as a shipyard to improve the working efficiency.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a welding wire feeder according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a control box of the welding wire feeder.

FIG. 3 is a schematic perspective view of a welding wire feeder of Conventional Example 1.

4A is a schematic perspective view of a wire feeding device for welding of Conventional Example 2; and FIG. 4B is a schematic top view of a wire feeding device of Conventional Example 2.

[Explanation of symbols]

 Reference Signs List 1 side plate 1a left side plate 1b right side plate 2 printed circuit board on which control circuit is mounted 3 control box 3a control box right side plate 3b control box left side plate 3c control box top plate 3d control box right side plate 4 front plate 5 bottom plate 6 spool shaft

Claims (4)

[Claims] 1. A printed circuit board comprising a left and right side plate, a front plate, a bottom plate, and a spool shaft on which a welding wire is mounted as a case of a wire feeding device main body, and on which a control circuit for performing wire feeding control is mounted. A welding box feeder in which a control box having a housing is disposed on a side plate of the case so as not to be on the axis of the spool shaft. 2. The welding wire feeding device according to claim 1, wherein the control box is disposed on an inner surface of a side plate of a case of the wire feeding device main body. 3. A wire feeder for welding according to claim 1, wherein a printed circuit board on which a control circuit for performing wire feed control is mounted is mounted on a side plate opposite to a side plate of a case of the wire feeder body in the control box. apparatus. 4. A control box comprising left and right side plates, a bottom plate and a top plate, a left side plate disposed on a side plate of a case of a wire feeding device main body, and a bending angle between the right side plate and the top plate being obtuse. Item 2. A welding wire feeding device according to Item 1.