JPS5819015Y2 - Vertical automatic welding equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic vertical welding device that welds objects to be welded vertically or substantially vertically while running a self-propelled cart carrying a welding tool.

Generally, when performing vertical welding while running a self-propelled dolly, the ends of cables such as shielding gas hoses, welding equipment cooling hoses, and electric control cables are carried by the self-propelled dolly. Because the self-propelled trolley moves up or down, the weight of the cables directly acts on the self-propelled trolley.

Therefore, as the object to be welded 1 becomes longer as shown in the conventional apparatus shown in FIG. act.

For this reason, it is necessary to increase the driving force of the self-propelled dolly and to make the structure of the self-propelled dolly robust so that it is not affected by the eccentric force due to the weight of the cables, and it is necessary to increase the driving force of the self-propelled dolly. Because of the large size and weight of the self-propelled trolley, it took time to set up the self-propelled trolley, and in some cases, a crane was required to set up the trolley.

Furthermore, the length of the cables hanging vertically varies depending on the position of the self-propelled trolley, the weight of the cables is not constant, and therefore the eccentric force due to the weight of the cables acting on the self-propelled trolley is not constant. There was a problem in that the running of the self-propelled trolley became unstable, resulting in unstable welding results.

An object of the present invention is to provide an automatic vertical welding device that eliminates the above-mentioned conventional drawbacks.

That is, the present invention provides a cable support separate from the self-propelled trolley, supports the cables with this support, and connects the cable support to a hoisting device so as to move it up or down. The cable support device and the self-propelled trolley are controlled by their own gravity so that the distance when the cable support and the self-propelled trolley approach each other and the distance when they are separated become set intervals, respectively. The present invention provides a vertical automatic welding device in which the automatic welding device has almost no effect on the self-propelled truck.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIGS. 2 and 3, 1 is a workpiece to be welded, and 2 is a self-propelled cart with a drive source that moves approximately along the surface of the workpiece 1. It is guided by rails 3 arranged in parallel, and is movable along the rails 3 by driving drive wheels (not shown) that engage with the rails 3.

This self-propelled trolley 2 is equipped with welding tools such as a wire reel 4, a wire feeding device 5, a welding torch 6, and a torch adjustment device 7 that supports the welding torch 6.

8 is cables such as shielding gas hoses, cooling hoses, and electrical control cables that are connected to welding equipment.
The upper ends of the cables 8 are supported by a cable support 9.

Reference numeral 11 denotes a hoisting device for raising or lowering the cable support 9. This hoisting device includes, for example, a winding device 112 having a drive source 111 installed at the upper end of the workpiece 1, and a free end. The flexible member 113 has a flexible member 113, for example, a plain member or a chain, which is secured to the cable support 9 at one end and wound around the winding tool 112 at the other end.

This performance device 11 is started or stopped by an electric signal generated by an interval detection device, which will be described later.

FIG. 3 shows an electric signal for starting or stopping the drive source 111 of the hoisting device 11 in order to set the distance between the self-propelled trolley 2 and the cable support 9 when they approach each other and when they separate. Interval detection switch device 1 that generates
9 is a detailed diagram of FIG.

The distance detection device 19 has a frame 12 fixed to the self-propelled trolley 2, for example, and a spring member 131.1 is attached to the frame.
A sliding rod 14 that is movable in the Yl-Y2 direction via 32 is disposed.

A lever 16 is also rotatably attached to the frame 12.

One end of the lever 16 is provided with a spherical part, and this spherical part is engaged in a hole provided in the approximate center of the sliding rod 14, and the other end of the lever 16 is connected to the lever 16 through a spring member 15 and a cable. and is continuous to the cable support 9.

Reference numerals 17 and 18 designate signal generating means, such as limit switches, provided to face the ends of the sliding rod 14 in the Yl and Y2 directions.

The sliding rod 14 normally generates the signal generating means 1 when the end of the lever 16 in the X2 direction is not moved in the Y1 direction or the ¥2 direction.
7.18 are biased by spring members 131 and 132 so as to remain at a neutral position in which neither of them is operated.

These frame body 12, spring members 131, 132, and sliding rod 14
, spring member 15 , lever 16 and signal generating means 17.18
The interval detection device 19 is configured by the above.

Next, the operation of the above embodiment will be explained.

To start welding, first, the welding torch 6 is aligned with the line to be welded 101, and the self-propelled trolley 2 and cable support 9 are moved so that the signal generating means 17 and 18 of the distance detection device 19 do not operate. After the arrangement, a drive source (not shown) of the self-propelled trolley 2 is driven to cause the self-propelled trolley 2 to travel, for example, in the Y1 direction.

At the same time as the self-propelled trolley 2 starts traveling in the Y1 direction, or after a short time has elapsed after the start of traveling, the wire feeding device 5 is driven and welding is performed while feeding the welding wire to the welding torch 6.

In this case, since the signal generating means 17 and 18 of the interval detection device 19 are not operating, the drive source 111 of the hoisting device 11
is not driven, and the cable support 9 is held stationary.

When the self-propelled trolley 2 travels in the Y1 direction while welding, the self-propelled trolley 2 and the cable support 9 approach each other, and the distance between the self-propelled trolley 2 and the cable support 9 when they approach each other is When the set interval is reached, the lever 16 is moved to
The ends in two directions are pulled in the Y2 direction by a spring member 15 connected to the cable support 9, the sliding rod 14 moves in the Y1 direction, the signal generating means 17 is activated, and an electric signal is generated.

When this electric signal is generated, an electric control device (not shown) drives the drive source 111 of the performance device 11 so that the flexible member 113 is wound around the winding tool 112.

In this case, the self-propelled trolley 2 performs welding while constantly traveling in the Y1 direction at the welding speed, but the winding speed of the flexible member 113, that is, the lifting speed ■1 of the cable support 9 in the Y1 direction is automatically Since the welding speed of the traveling trolley 2 is selected to be higher than ■2, when the cable support 9 starts to move up,
The cable support 9 precedes the self-propelled truck 2 in the Y1 direction by a speed difference represented by 1-v2.

When the self-propelled trolley 2 and the cable support 9 are separated by the set distance in this way, the end of the lever 16 in the X2 direction is pulled in the Y1 direction by the spring member 15 connected to the cable support 9. , the sliding rod 14 moves in the Y2 direction, the signal generating means 18 operates, and an electric signal is generated.

When this electrical signal is generated, the drive source 111 of the cable support 9 is electrically controlled to stop immediately, and the cable support 9 is also stopped.

After this, the self-propelled trolley 2 and the cable support come close to each other,
When the set interval is reached, the cable support 9
is raised and stopped from the cable support 9 when the self-propelled trolley 2 and the cable support 9 are separated by a set distance.

In this way, the drive source 111 is driven and stopped by the electric signal of the distance detection device 19 which is activated when the self-propelled trolley 2 and the cable support 9 approach and separate, and therefore the self-propelled trolley runs at the welding speed. Welding progresses while the cable support 9 moves intermittently relative to the cable support 9.

If the main part of the distance detection device 19 is provided on the self-propelled truck 2 side as shown in FIG. 3, the main part of the distance detection device 19 and the cables 8 will hardly interfere with each other, electrical signals can be reliably obtained.

Furthermore, if the cable support 9 and the main part of the distance detection device 19 are connected via a spring member such as the spring member 15, the driving and stopping of the cable support 9 in response to the electric signal of the distance detection device 19 will be delayed in time. Even if the shock is absorbed by the spring member 15, the parts of the diaphragm detection device 19 will not be damaged.

FIG. 4 shows the main parts of the distance detection device 19 on the cable support 9.
This main part and the self-propelled trolley 2 are connected by a cable.

In this case, the drive source 111 and the winding tool 112 are supported by the cable support 9, and the free end of the flexible member 113 is engaged with a stopper arranged at the upper end of the workpiece 1. The device 11 can also be configured.

However, in this configuration, the weight of the drive source 111 and the take-up tool 112 acts on the cable support 9 together with the cable support 9, so the drive source 111 needs to be larger.

Therefore, the driving source 111 and the winding tool 112
It is preferable to arrange it at the upper end of the .

In the above embodiment, limit switches 17 and 18 are used as signal generating means for generating electric signals, but a proximity switch such as a charging switch or a reed switch may be used in place of the limit switch.

In the above embodiment, since the self-propelled cart is configured to move while being guided by the rails, positioning the rails with respect to the line to be welded is troublesome. Since it is reliably guided by the rail, subsequent operations can be performed easily and safely.

Of course, it is also possible to configure the self-propelled truck to be driven by a magnetic roll so that it travels, for example, along the groove of the workpiece.

In addition, if a fall prevention device is provided that connects the self-propelled dolly and the cable support with a rope or chain, the self-propelled dolly will not fall even if the drive source of the self-propelled dolly or any part of the drive transmission mechanism is damaged. Do not damage the equipment or cause personal injury.

In the above embodiment, an example in which welding is performed while the self-propelled trolley is being moved up and down has been described, but it goes without saying that the present invention can also be applied to cases where welding is performed while the self-propelled trolley is being lowered. It is.

As described above, according to the present invention, most of the dead weight of cables is carried by the cable support and the raising device, so the self-propelled trolley can be made smaller and lighter, and the weight of the cable support can be reduced. Since an electric signal for controlling on/off of the drive source is reliably obtained by the interval detection device, the self-propelled trolley and the cable support travel with a predetermined interval apart.

Therefore, the self-propelled trolley moves smoothly without knocking to perform automatic welding, and when the welding positions are different, the trolley can be easily transported and work efficiency is improved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional example, Fig. 2 is a front view showing an embodiment of the present invention, Fig. 3 is an enlarged view showing a gap detection device, and Fig. 4 shows another embodiment of the gap detection device. FIG. 1... object to be welded, 2... self-propelled trolley,
8...Cables, 9...Cable support, 11...Hoisting device, 12...Frame, 14...Sliding Moving rod, 16... Lever, 17° 18... Signal generating means, 19...
...Interval detection device.

Claims (1)

[Scope of utility model registration request] a self-propelled trolley that carries a welding tool and travels at a constant speed; a cable support that is placed near the self-propelled trolley and carries cables connected to the welding tool; a moving device with a drive source that raises or lowers the cable support at high speed; a distance detection device that generates an electric signal depending on the distance between the self-propelled trolley and the cable support; In the vertical automatic welding apparatus, the distance detection device includes a control device that controls on/off the drive source of the hoisting device based on an electric signal generated by the detection device, and the distance detection device is configured to control the distance between the self-propelled truck and the cable support. a frame disposed on one of the frames, a sliding rod slidably supported by the frame, and a substantially central portion pivotally supported by the frame and one end engaged with the sliding rod. a lever that rotates with the displacement of the sliding rod, one end of which is connected to the other end of the lever, and the other end of which is connected to the one of the self-propelled trolley and cable support that is not provided with the frame; A vertical automatic welding device comprising a coupled flexible member and a signal generating means for detecting the position of the sliding rod and generating an electric signal.