JPH0519183Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a forced air-cooled arc welding machine.

[Prior Art] Generally, as shown in FIG. 3, this type of arc welding machine includes a truck 1, an underframe 2 constituting the truck 1, wheels 3, a transformer 4 placed and fixed on the truck 1, It consists of a movable iron core 5 that adjusts the secondary current, a handle 6 for current adjustment connected to it, a cooling fan 7 for forced air cooling, an electric shock prevention device 8, and other electrical parts such as a switch 9 and a fuse 10. There is.

By the way, in order to make this type of arc welding machine smaller and lighter, the coil of the transformer 4 is wound directly around the iron core, and a cooling fan 7 for forced air cooling is used to prevent internal temperature rise. ing. Further, as will be described later, the underframe 2 has a large frame hole 2a in the center in order to reduce weight.

However, in general, it is unavoidable that welding sites have a work environment with a lot of iron scraps and dust, and dust, especially iron powder, scattered on the floor is attracted by the magnetic force of the transformer, adheres to the space between the coils, and becomes dusty between the coils. This has caused problems such as short-circuiting, causing coil burnout, and shortening the lifespan of other electrical components.

[Problems to be solved by the invention] This invention uses an arc welding machine to block dust, especially iron powder, scattered on the floor surface, using the dolly part of the arc welding machine, to prevent dust from entering the interior. This protects the arc welding machine from these accidents such as burnout of the coil and deterioration of parts, and allows the air volume of the ventilation passage inside the arc welding machine to be easily adjusted.

[Means for Solving the Problems] In order to solve the problems of the prior art, the present invention provides a truck, a transformer placed and fixed on the truck, a movable iron core for adjusting the secondary current, In an arc welding machine equipped with a cooling fan for forced air cooling and a case supported on a truck, a non-magnetic plate separating the transformer and the floor surface is provided on the underframe of the truck so that it can be moved and adjusted. It is in.

[Embodiment of the invention] FIGS. 1 and 2 show essential parts of an embodiment of the invention, and the invention will be explained with reference to FIG. 3.
The truck 1 consists of an underframe 2 and wheels 3, and the underframe 2 has a large frame hole 2a in its center, as described above. Also, on the front and back, on both sides,
Rising portions 2b, 2c, and 2d are provided, and the front plate 12,
The case 11 consists of a rear plate 13 and a cover plate 14,
Support each at the corresponding position. This support is achieved by using the mounting holes 2e of the respective underframes 2 and the mounting holes 11a of the case 11, and supporting each other with screws (not shown). 15 is a non-magnetic plate;
In FIG. 3, this partition is used to isolate the transformer 4 from the floor 16. This is the frame hole part 2a
It may be partitioned so as to completely close it, or it may be partitioned so as to leave some gaps vertically or horizontally as shown in No. 23. In this case as well, the effect of blocking the transformer 4 and the floor 16 is almost the same.
The non-magnetic plate 15 is attached to the underframe 2 by inserting screws 17 from the lower part of the underframe 2 into the attachment holes 2f on the periphery of the underframe 2 through the attachment holes 15a of the non-magnetic plate 15.
Attach by. Note that 18 is a handle.

In this type of arc welding machine, the inside is forcedly cooled by the cooling fan 7 attached to the rear plate 13, but the front plate 12,
Cold air from the outside air sucked through the ventilation holes 12a and 14a of the cover plate 14 cools the inside and is exhausted from the ventilation holes 13a of the rear plate 13. Conversely, air is taken in through the ventilation hole 13a and follows the opposite ventilation path.

The above-mentioned attachment of the non-magnetic plate 15 to the underframe 2 is carried out by
``As shown in Figure 2, the partitions may be partitioned vertically or horizontally to leave some gaps.'' The reason for this is that the internal wind direction and volume can be adjusted. That is. Therefore, the mounting hole 15a is made into an elongated hole or a hook-shaped hole so that it can be adjusted.

As described above, the arc welding machine of the present invention is provided with a movable and adjustable non-magnetic plate that partitions the transformer and the floor surface on the cart.

[Effects of the invention] The arc welding machine of the present invention is equipped with a non-magnetic plate on the cart that separates the transformer from the floor, which prevents iron chips and dust scattered on the floor from approaching the transformer. This prevents burnout of the coil and damage to parts caused by dust, and since it uses a non-magnetic plate to isolate the transformer from the floor, it effectively protects the arc welder from iron powder dust. It is something that can be protected. In addition, by using an ordinary insulating plate as the non-magnetic plate, there is no problem in terms of cost and weight reduction.Furthermore, in this type of forced air cooling type arc welding machine, the air volume in the internal ventilation duct can be reduced. It can also be easily adjusted and the desired purpose can be achieved.

As described above, the arc welding machine of the present invention is lightweight among this type of arc welding machine and can protect the transformer and other electrical parts, which is highly effective.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the present invention. FIG. 2 is a perspective view of the main parts of the present invention.
FIG. 3 is an internal side view of this type of arc welding machine. 1...Dolly, 2...Underframe, 2a...Frame hole, 7...
...Cooling fan, 11...Case, 15...Nonmagnetic plate.

Claims (1)

[Scope of utility model registration request] The arc welding machine is at least equipped with a truck, a transformer placed and fixed on the truck, a movable iron core for adjusting secondary current, a cooling fan for forced air cooling, and a case supported on the truck. An arc welding machine characterized in that a non-magnetic plate partitioning the transformer from the floor is provided on the underframe of the truck so that the movement can be adjusted.