JPH0638623Y2 - Vertical welder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a vertical welding machine, and more particularly to a clamp device for a vertical welding machine.

(Prior Art) A conventional vertical welding machine will be described. A table for supporting an object to be welded is provided with an abutting member for abutting both sides of a welded part of the object to be welded. A processing head equipped with a welding torch for welding an object to be welded is provided at an upper position so as to be movable in an x-axis direction (horizontal direction), a y-axis direction (front-rear direction), and a z-axis direction (vertical direction). At the same time, a clamp device for pressing and fixing the object to be welded to the butting member is provided so as to be movable in the y-axis direction and the z-axis direction. The clamp device moves in the y-axis direction and the z-axis direction by the action of the fluid pressure cylinder device. Therefore, by appropriately moving the clamp device in the y-axis direction and the z-axis direction, the object to be welded is pressed and fixed to the abutting member. Then, the working head can be appropriately moved in the x-axis, y-axis, and z-axis directions, and the welding torch can be appropriately operated to perform the welding work.

(Problems to be solved by the invention) However, in the conventional vertical welding machine as described above, when the operator's hand or the like enters between the clamp device and the table, if the clamp device is lowered, an accident occurs. However, there was a problem that the welding work was not carried out smoothly and the safety was poor. Even if an emergency stop button for stopping the driving of the clamp device via the fluid pressure cylinder device is provided, the same problem will occur if the operator delays pressing the emergency stop button.

Then, this invention aims at providing the vertical welding machine which can perform welding work safely and smoothly in order to solve the said problem.

[Constitution of device]

(Means for Solving the Problems) In view of the conventional problems as described above, the present invention provides a butting member on the rear side of a table supporting an object to be welded, and the object to be welded on the table is A clamp device for pressing and fixing to an abutting member is provided above the table so as to be vertically movable and back and forth movable, and welding for welding an object to be welded pressed and fixed to the abutting member by the clamp device. In a vertical welding machine provided with a processing head provided with a torch so as to be movable in the front-rear, left-right and up-down directions, a part of a human body or an object is provided on the lower surface of the clamp device between the clamp device and the table. A detection device is provided for detecting the entry and raising the clamp device.

(Embodiment) An embodiment according to the present invention will be described below with reference to the drawings.

Referring to FIG. 2, the vertical welding machine 1 includes an upper frame 3 and a lower frame 5, and a table 7 for supporting a workpiece W is provided on the upper surface of the lower frame 5.

A processing head 11 having a welding torch 9 for welding the welded portion of the workpiece W is provided on the upper frame 3 in the x-axis direction (horizontal direction in this embodiment) and the y-axis direction (front-back direction in this embodiment). , Z-axis direction (up and down direction in this embodiment). The welding torch 9 can rotate about the θ axis.

On the rear side of the table 7 in the lower frame 5, abutting members 13A, 13B for abutting both sides of the welded portion of the workpiece W are provided so as to be vertically movable and the degree of opening and closing can be adjusted. The abutting members 13A and 13B may be provided on the table 7 without any problem.

The abutting members 13A and 13B are provided with heat radiating members (not shown) for radiating the heat of the welded object W during welding. As a result, the thermal strain of the workpiece W can be made relatively small.

A support arm 15 is provided on the frame 3, and a clamp device 19 having a plurality of molds 17 is provided on the support arm 15 in order to press and fix the workpiece W to the butting members 13A and 13B. Is provided. The clamp device 19 moves in the y-axis direction (front-rear direction) with a constant stroke by the action of the y-axis cylinder device (not shown), and z-axis with a constant stroke by the action of the z-axis cylinder device 21.
It moves in the axial direction (vertical direction).

As can be understood from the above configuration, the z-axis cylinder device 21
And lower the clamp device 19 by operating
By appropriately operating the y-axis cylinder device and moving the clamp device 19 rearward, the workpiece W is pressed and fixed to the abutting members 13A, 13B. Then, the processing head 11 is moved in the x-axis direction, the y-axis direction, and the z-axis direction, the welding torch 9 is rotated about the θ-axis, and the welding torch 9 is appropriately operated so that the workpiece W is desired. Welding can be performed.

On the lower side of the clamp device 19, there is provided a detection device 23 for detecting that a part of a human body or an object has entered within the vicinity of the descending region of the clamp device 19. The detection device 23
When turned on, a predetermined signal is sent to a solenoid valve (not shown) connected to the z-axis cylinder device 21, and the clamp device 19 immediately rises.

More specifically, referring to FIG. 1, a base plate 25 is provided on the lower side of the clamp device 19, and the base plate 25 is provided with a limit switch 27 which constitutes a part of the detection device 23. At the same time, a dog member 29 that is in contact with the limit switch 27 is provided via a hinge pin 31 so as to be vertically swingable. A projecting portion 35 of the dog member 29 is fitted in the through hole 33 formed in the base plate 25, and a stopper member 39 is provided on the projecting portion 35 in order to limit downward swing of the dog member 29. It is provided. A spring (not shown) is mounted in the through hole 33, and the dog member
Biasing 29 downwards.

The operation of the present embodiment having the above-mentioned configuration will be described.

The z-axis cylinder device 21 is appropriately operated to operate the clamp device 19
To lower. At this time, if the operator's hand or the like enters the vicinity of the descending region of the clamp device 19, the operator's hand or the like comes into contact with the dog member 29, and the dog member 29 moves upward against the biasing force of the spring. The limit switch 27 of the detection device 23 is turned on. Then, the z-axis cylinder device 21
A predetermined signal is sent to the solenoid valve connected to, and the clamp device 19 immediately rises.

According to the present embodiment as described above, when the operator's hand or the like comes into contact with the dog member 29 when the operator's hand or the like enters the vicinity of the descending region of the clamp device 19, the limit switch 27 of the detection device 23 is detected. Is turned on and the clamp device 19 is immediately raised, so that the worker's hands and the like are not caught between the clamp device 19 and the table 7, and the welding work can be performed safely and smoothly.

It should be noted that the present invention is not limited to the description of the above embodiment, and for example, as the detection device 23, a pressure sensitive switch such as a tape switch is provided on the base plate 25, or a photoelectric switch, a proximity switch, an infrared sensor, etc. are provided. The present invention can be implemented in various modes by making appropriate changes such as the above.

[Effects of the Invention] As will be understood from the above description of the embodiments, in short, the present invention provides the abutting members (13A, 13B) on the rear side of the table (7) supporting the workpiece (W). A clamp device (19) provided to press and fix the object (W) to be welded on the table (7) to the abutting member (13A, 13B).
Is provided above the table (7) so as to be vertically movable and can be moved back and forth, and is welded to a workpiece (W) pressed and fixed to the abutting members (13A, 13B) by the clamp device (19). A vertical welding machine comprising a processing head (11) equipped with a welding torch (9) for performing a front-rear, left-right and up-down movement.
A detection device (23) for raising the clamp device (19) by detecting that a part of a human body or an object has entered between the clamp device (19) and the table (7) on the lower surface of the Is provided.

As is apparent from the above-described configuration, in the present invention, a vertical welding machine has a lower surface of a vertically movable and vertically movable clamp device 19 such that a hand or the like is inserted between the table 7 and the clamp device 19. Since the detection device 23 for detecting that the clamp device 19 is lifted is provided, when the detection device 23 detects and operates, the clamp device 19 is lifted, and between the clamp device 19 and the table 7. There is no need to pinch or crush your hands, etc., and safety is improved.

[Brief description of drawings]

The drawings are for explaining the embodiments according to the present invention.
The figure is a diagram showing an essential part of the present embodiment. FIG. 2 is a perspective view of a vertical welding machine. 1 ... Vertical welding machine, 7 ... Table 13A, 13B ... Abutting member 19 ... Clamping device, 23 ... Detecting device

Claims (1)

[Scope of utility model registration request] 1. A table (7) for supporting an object (W) to be welded.
An abutting member (13A, 13B) is provided on the rear side of the abutting member (13A, 13B) on the table (7).
A clamp device (19) for pressing and fixing to the 13B) is provided above the table (7) so as to be vertically movable and movable back and forth, and the abutting member (13A, 13B) is provided by the clamp device (19). A vertical welding machine comprising a processing head (11) equipped with a welding torch (9) for welding a workpiece (W) that is pressed and fixed to the movable body in the front-rear, left-right, and up-down directions. On the underside of the device (19),
A detection device (23) is provided between the clamp device (19) and the table (7) to detect that a part of a human body or an object has entered and raise the clamp device (19). A vertical welding machine characterized by that.