JPS6144593B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an arc welding machine, and more particularly to an improvement in the case structure of a DC arc welding machine or a dual-use DC and AC arc welding machine.

In general, in arc welding machines, vertical covers on the sides are often attached and detached when internal inspection or repair is performed. Therefore, in the conventional arc welding machine, as shown in FIG.
Notch 20 provided at the lower edge of the side vertical cover 20'
The machine frame and the side vertical cover 20' are removably connected by bolts by engaging the receiving fittings A' and the receiving fittings A'. However, arc welding machines are generally connected to various cables such as power cords and control cables, so if there are brackets or notches that protrude from the bottom of the arc welder as shown above, these brackets or notches will be damaged. There have been problems such as interference between the notch and the various cables, causing the various cables to break, the metal fittings to separate, or the side vertical cover to be pulled outward and bent outward. In addition, workers often move around near the arc welding machine, and in this case, part of the worker's clothing may get caught in the receiving bracket or the notch on the lower edge of the side vertical cover, which can lead to personal injury. It was becoming. Furthermore, since the engagement part between the machine body and the side vertical cover is provided at the bottom of the machine frame, as the side vertical cover becomes larger and has a higher gravity, it is difficult for the operator to step on the side vertical cover when attaching it to the machine frame. It becomes difficult to confirm the engagement relationship between the engaging part of the machine frame's receiving fitting and the side vertical cover, and attention must be paid only to the retention of the side vertical cover. In this case, if the worker releases the side vertical cover when the machine frame holder and the side vertical cover are not engaged, the side vertical cover may fall onto the worker's feet, resulting in personal injury. It was extremely dangerous. Further, in the conventional arc welding machine, the engaging portion between the lower part of the machine frame and the notch in the lower edge of the side vertical cover is visible from the outside, which has the disadvantage that the appearance of the arc welding machine is spoiled.

An object of the present invention is to provide an arc welding machine that eliminates the above-mentioned drawbacks, and embodiments of the present invention will be described in detail below with reference to FIGS. 2 to 10.

Fig. 2 shows the external appearance of one embodiment of the present invention;
The figure shows a state in which the top cover and one side vertical cover have been removed from FIG. In Figures 2 and 3, reference numeral 1 denotes an underframe formed by combining four angle members 2, 2 and 3, 3 into a rectangular shape, and at the four corners of this underframe are front supports 4 extending vertically upward. ，
5 and rear struts 6 and 7 are fixed. A front beam 8 and a rear beam 9 are attached to connect the upper ends of the front struts 4 and 5 and the upper ends of the rear struts 6 and 7, respectively. Side beams 10, 10 are attached to connect the upper ends of the front and rear columns 5, 7, respectively. In the illustrated example, beams 8 to 10 are each formed of angle members, and a machine frame 11 is constituted by the underframe 1, the supports 4 to 7, and the beams 8 to 10.
On the underside of the four corners of the underframe 1 are wheels for movement 12, 12...
...is installed. Note that 13 is a reinforcing material for the underframe 1. An appropriate number of support members 14 are installed between the beams 8 to 10 and the underframe 1 as necessary with bolts 15.
The supporting member is attached to the supporting member so that various electrical parts (not shown) necessary for the arc welding machine are attached. The drawings show a state in which the support member 14 is attached between the beam 10 and the angle member. Between the front struts 4 and 5 and the rear strut 6,
A front vertical cover 16 and a rear vertical cover 17 are attached to each of the spaces 7 with bolts, etc., and electric meters, operation knobs, etc. are arranged on the front vertical cover 16. A top cover 18 is attached to the upper end surfaces of the columns 4 to 7 by bolts 19, 19, . . . .

Side vertical covers 20, 20 are attached between the front and rear columns 4, 6 and 5, 7, respectively. As shown in FIG. 4, each side vertical cover 20 has inwardly bent parts 21, 21 at a height _h1 perpendicular to the plate surface at both ends in the horizontal direction, and a A pair of locking devices 22, 22 are spaced apart in the horizontal direction. A horizontally extending reinforcing member 23 is attached to the inner surface of the lower end of the side vertical cover 20 by welding or the like. In the illustrated example, the reinforcing member 23 is made of a channel material and has a height h ₂ approximately equal to the height h ₁ of the bent portion 21 (see FIG. 5). The locking tool 22 is made of a plate bent into an L-shape, and is welded to the inner surface of the upper end of the cover 20 so that one plate surface 22a is horizontal. Each locking tool 2
A mounting hole 24 is provided in the plate surface 22a of the cover 20, and a reinforcing member 23 is provided at the lower end of the cover 20.
Attachment holes 25, 25, . . . are provided that penetrate through the. The upper surface of each side beam 10 is provided with screw holes 26, 26 corresponding to the mounting holes 24 of the locking tool 22, and each angle member 3 of the underframe 1 is provided with mounting holes 26, 26.
Screw holes 27, 27,... corresponding to 5, 25...
...is provided.

When installing the above-mentioned side vertical cover 20, first remove the top cover 18, and then install the side vertical cover 20.
Place the lower surfaces of the locking tools 22, 22 on the side beam 10, and turn the lower end of the cover 20 toward the underframe 1 with the point of contact between the locking tools 22, 22 and the side beam 10 as the center of rotation. Rotate. When the cover 20 is rotated in this manner, the bent portion 21 of the cover 20 comes into contact with the underframe 1 and remains stationary. In this state, as shown in FIG.
8, 28 and pass through the mounting holes 25, 25, . . . into the screw holes 27, 27, . . . and insert the bolts 29,
29,...... (see Figure 2). After that, place the top cover 18 on the pillars 4 to 7, and screw the bolts 19, 19, . . . into the screw holes 30, 30, . Install.

7 and 8 show another embodiment of the present invention, in which the tip of the locking tool 22 is bent downward at a right angle to form a bent portion 22b. . When the locking tool 22 is formed in this way,
As shown in FIG. 8, the upper end of the cover 20 can be locked to the side beam 10 by engaging the vertical surface of the bent portion 22b of the locking tool 22 with the vertical surface of the side beam 10. 22 to the beam 10 becomes unnecessary, and the cover can be easily attached and detached. Especially in this case, the top cover 18 and the side vertical cover 2
0 is attached, the distance l ₁ between the upper end of the side vertical cover 20 and the lower surface of the top cover 18 is the locking tool 2.
If the vertical length l 2 of the bent portion 22b of No. 2 is made to be slightly larger than the vertical length l ₂ , by using this interval to move the side vertical cover 20 up and down, the side vertical cover 20 can be moved up and down with the top cover 18 attached. The vertical cover 20 can be attached and detached. In FIG. 8, reference numeral 31 indicates an eye bolt for transportation, and the top cover 18 is attached to this eye bolt.

As described above, in each of the above embodiments, the support member 14 is bolted to the machine frame 11, and necessary parts are supported by this support member. The bolts 15 that fix the support member 14 to the machine frame and the bolts (not shown) for attaching electrical components to the support member have different heights, so the cover 20 may have been engaged with these bolts. This cover cannot be installed vertically. Therefore, as shown in FIG. 6 or 7, the height h ₁ of the bent portions 21, 21 provided at both horizontal ends of the side cover 20 and the height h ₂ of the reinforcing member 23 are determined by adjusting the height of the bolts. It is desirable to make the length larger than the protrusion length. If this is done, the cover 20 will not come into contact with bolts, so the cover 20 can be mounted vertically. Note that instead of providing the bent portions 21, 21 at both ends of the cover 20 in the horizontal direction, reinforcing members having a height _h1 may be attached to these portions.

9 and 10 show another embodiment of the present invention, in which the side vertical cover 20
does not have a bent part at both ends in the horizontal direction, and each side vertical cover 20 is between the pillars 5 and 7 and between the pillars 4 and 6.
It has a horizontal dimension that spans between the two. The locking tool 22 of the side vertical cover 20 consists of a bent portion extending horizontally from the upper end of the cover 20, and the locking tool is provided with a mounting hole 24. Locking tool 2
2 and 22 are provided at intervals in the horizontal direction by engaging with the upper end surfaces of the struts 5 and 7 and the upper end surfaces of the struts 4 and 6, and the mounting hole 24 is a screw hole 30 provided in each strut. It is set up to match. Further, in this embodiment, the diameter of the attachment hole 24 is made large so that an eye bolt for transportation can be screwed through the attachment hole 24. At both ends of the side vertical cover 20 in the horizontal direction, mounting holes 31 are provided at intervals vertically.
31 are provided, and the struts 4 are installed through these mounting holes.
Each side vertical cover 20 is fixed by bolts 32 screwed into holes 7 to 7. Also side vertical cover 2
A reinforcing member 23 extending in the horizontal and vertical directions is fixed to the inner surface of 0 by welding or the like.

In the embodiment shown in FIGS. 9 and 10, the locking tool 22 is engaged with the upper end surface of the support columns 4 to 7, and the cover 20 is
are brought into contact with the vertical surfaces of the columns 4, 6 or 5, 7, and then the top cover 18 is placed on top of each locking tool 22,
The cover 18 and each locking tool 22 are fixed to the pillars 4 to 7 by screwing an eye bolt or the like into the screw hole 30. Further, each cover 20 is further fixed by screwing bolts 32, 32, . . . into the corresponding columns through the mounting holes 31, 31, .

If the side vertical cover 20 is provided with a bent part 21 as shown in FIG. 4 or a reinforcing member 23 is provided as shown in FIG. 10, the mechanical strength of the side vertical cover 20 can be increased, so that It is possible to prevent the cover from vibrating due to leakage magnetic flux of the transformer. Moreover, when the mechanical strength of the cover 20 increases,
Since the number of bolts for attaching the cover can be reduced, attachment and detachment of the cover can be made easier.

It goes without saying that the present invention is not limited to the embodiments described above, and that parts of the embodiments can be replaced or combined as appropriate.

As described above, according to the arc welding machine of the present invention, a locking tool for vertically positioning the side vertical cover is provided at the top of the side vertical cover so that the operator can easily check the position of the locking tool. This makes it easy to attach and detach the cover. In addition, since the locking tool only engages with the machine frame inside the cover, arc welding eliminates the need for a receiving metal fitting protruding to the outside at the bottom of the machine frame and a notch on the lower edge of the vertical cover, which were previously required. There is no contact between the machine's cables and the locking device, and the worker's clothes will not get caught in the locking device, which has the advantage of eliminating the risk of personal injury, which was a concern in the past. There is.

Furthermore, since the side vertical cover is provided with vertical and horizontal reinforcing members, the mechanical strength of the side vertical cover can be increased. Vibration of the side vertical cover can be prevented. Therefore, the number of bolts for attaching the side vertical cover can be reduced, and the side vertical cover can be attached and removed easily and quickly.
Moreover, since the side vertical cover has a reinforcing member on the machine frame side with approximately the same protrusion in the vertical and horizontal directions, even if bolts are installed on the machine frame side of the arc welding machine, the The side vertical cover can be installed perpendicularly to the machine frame without coming into contact with other objects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional arc welding machine, FIG. 2 is a perspective view of an arc welding machine according to the present invention, and FIG. 3 is a perspective view of FIG. 2 with the top cover and one side vertical cover removed. 4 is a perspective view of a side vertical cover suitable for use in the embodiment of FIG. 3, FIG. 5 is a sectional view taken along the line -- in FIG. 4, and FIG. 6 is a sectional plan view of the main part of FIG. 3; FIG. 7 is a cross-sectional plan view of a main part showing another embodiment of the present invention, FIG. 8 is a cross-sectional view taken along the line - in FIG. 7, and FIG. 9 is a main part showing still another embodiment of the present invention. The cross-sectional plan view and FIG. 10 are perspective views of the side vertical cover used in the embodiment of FIG. 9. 11...Machine frame, 16...Front vertical cover, 17
...Rear vertical cover, 20...Side vertical cover,
22...Locking tool, 23...Reinforcing member.

Claims (1)

[Scope of Claims] 1. A front and rear vertical cover attached to the machine frame, a pair of side vertical covers detachably attached to the machine frame, and an upper part of these vertical covers that is more horizontal than the vertical cover. In the arc welding machine, the arc welding machine is substantially enclosed by a top cover attached to protrude in a direction, and the vertical cover is in contact with an upper part of the machine frame inwardly at the upper part of at least one of the side vertical covers. A locking tool is provided for vertically positioning the side vertical cover, and a mounting hole is provided in the side vertical cover below the position of the locking tool. and an arc welding machine characterized in that a reinforcing member having substantially the same protrusion length in the horizontal direction is disposed on the machine frame side. 2. The locking device disposed inside the upper part of the vertical cover on the side surface has a shape having a contact surface that is substantially parallel to the horizontal surface and a contact surface that is substantially parallel to the vertical surface and protrudes downward from the contact surface. 2. The arc welding machine according to claim 1, wherein the locking tool is configured to be fixed to an upper part of the machine frame.