JP2002144041A - Torch holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torch holder in which in the case of necessity, a change- over switch for ventilation device is automatically changed over, a running cost in a working process containing a welding work, is reduced, the accident caused by the defective ventilation can be prevented and the trouble of a worker can be reduced. SOLUTION: A holder 3 incorporable to a welding torch and a sensor part 4 for sensing whether the welding torch exists in the holder 3 or not and also, connected with the change-over switch for ventilation device, are provided, and when the sensor part 4 is sensed that the welding torch does not exist in the holder part 3, the change-over switch is put on to drive the ventilation device in the high capacity. Then, when the sensor part 4 is sensed that the welding torch exists in the holding part 3, the change-over switch is changed over into the stop of the ventilation device or a low capacity driving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a torch holder for storing a torch of a welding machine.

[0002]

2. Description of the Related Art Since welding produces fumes harmful to the human body, many welding facilities such as a local exhaust system and a push-pull type ventilation system are installed in a welding workshop using a semi-automatic welding machine. . By the way, when welding is performed by a semi-automatic welding machine, it is rare that only welding work is performed at all times, and it is general to repeat steps of carrying in, setting, welding, and carrying out a workpiece.

[0003] Among these processes, since only the welding process generates harmful substances, the ventilator is operated only during this welding process, and in other processes, it is stopped or switched to low capacity operation. This is desirable in reducing running costs. However, in practice, the ventilator is always operated at the same capacity in every process during the working hours.To switch the operation status of the ventilator according to the work content, the ventilator switch must be turned on. There was no choice but to switch manually. Such manual switching operation of the switch is troublesome, not only places a heavy burden on the operator, but also may cause an accident due to poor ventilation if the switching device is inadvertently turned on and the ventilator is not operated.

[0004]

According to the present invention, the changeover switch of the ventilator is automatically switched as required to reduce running costs in work processes including welding work, and to prevent accidents due to poor ventilation. Moreover, an object of the present invention is to provide a torch holder capable of reducing the labor of an operator.

[0005]

A torch holder according to the present invention comprises a holder capable of accommodating a welding torch, a sensor for sensing the presence or absence of a welding torch in the holder and being connected to a changeover switch of a ventilator. Is provided. When the sensor unit detects that there is no welding torch in the holder unit, the changeover switch is turned on to operate the ventilator with high performance, and when the sensor unit detects that there is a welding torch in the holder unit, the changeover switch is set. Switch off the ventilation system or switch to low capacity operation. When there is a welding torch in the holder portion, that is, when the welding torch is not used, the running cost is reduced by automatically stopping or operating the ventilation device at a low capacity. Also, when a welding torch is used and there is no welding torch in the holder,
Automatically operates the ventilation system to high capacity to prevent poor ventilation.

The holder section is separated from the sensor section when there is no welding torch inside, and when the welding torch is stored inside, the holder section is movable so as to contact the sensor section by its weight. The contact can be a limit switch that senses the presence of a welding torch in the holder. The changeover switch of the ventilator does not switch unless the holder moves by the weight of the welding torch housed therein and contacts the limit switch, so that a malfunction does not easily occur.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 and 2,
The torch holder 1 of the present invention comprises a holder 3 capable of storing a welding torch 2 (FIGS. 3 and 4) of a semi-automatic welding machine, and a sensor unit comprising a limit switch 4 for detecting the presence or absence of the welding torch 2 in the holder 3. And a main body 5 that supports the holder 3 and the limit switch 4. The main body 5
The strip is bent in a flat U-shape with one side open, and the mounting piece 6 is fixed to the outer surface of the other side.

A pair of sleeves 7 made of an insulating material are inserted into the front end of the mounting piece 6 at an interval from each other, and this front end is superposed on the outer surface of the other side of the main body 5. Sleeve 7
A collar 8 made of an insulating material is interposed between the main body 5 and the other side of the main body 5, and a tapping screw 9 is screwed into the other side of the main body 5 through the sleeve 7 and the collar 8, so that the mounting piece 6 Is fixed to the main body 5. A bracket 10 extends rearward from the rear end of the mounting piece 6, and the bracket 10 is placed on the outer surface of a tapping plate 12 mounted on a support member 11 such as a column, and the bracket 10 and the tapping plate 12 The torch holder 1 is attached to the support member 11 by screwing the tapping screw 9 ′ into the support member 11.

A support piece 13 is projected toward one side from the outer surface of the front end of the front and rear sides of the main body 5, and the support piece 13 is disposed at a position facing the front end of the support piece 13 along the front and rear direction. The holder 14 is rotatably suspended near the upper end of the holder 3 by these shafts 14. The holder 3 has a cylindrical shape with open upper and lower ends, and an inclined wall 15 inclined upward and outward is formed on the upper side of one side. A projection 16 made of an insulating material is mounted on the lower end of the other side surface of the holder 3.

A pair of sleeves 7 'made of an insulating material are respectively inserted near the other side of the rear side of the main body 5, and the inner surfaces of these sleeves 7' are limited by a collar 8 'made of the insulating material. The switch 4 is abutted and a tapping screw 9 ″ is screwed into the limit switch 4 through the sleeve 7 ′ and the collar 8 ′, so that the limit switch 4 is fixed to the other side of the main body. It is connected to a changeover switch for switching between high-capacity operation, low-capacity operation and stop of a ventilator such as a push-pull type ventilator.
Limit switch lever part 1 swingable about 7
8 are suspended.

The limit switch lever 18 is arranged such that its lower end faces the protrusion 16 of the holder 3. Then, as shown by the solid line in FIG. 1, in a state where the limit switch lever portion 18 is hanging down, the limit switch 4 is turned on, and the changeover switch of the ventilator enters the high capacity operation side. On the other hand, as shown by the dashed line in FIG. 1, when the limit switch lever 18 is tilted, the limit switch 4 is turned off, and the changeover switch of the ventilator stops or switches to low-capacity operation. . A cover 19 that covers the limit switch 4 is mounted on the outer surface of the front side and the outer surface of the other side of the main body 5.

In an operation including a welding operation, when an object to be welded is sent to a welding step by a transport crane or the like, an operator sets the object to be welded on a welding work table. During this time, since the welding torch 2 is not used, the welding torch 2 is stored in the holder portion 3 of the torch holder 1 as shown in FIG. In this state, the welding torch 2 leans against the inclined wall portion 15 of the holder portion 3, and the weight of the welding torch 2 causes the holder portion 3 to rotate about the shaft 14, and incline downward so as to face the other side. Then, the protrusion 16 attached to the lower end of the other side of the holder 3 is
The lower end of the limit switch lever 18 to tilt the limit switch lever 8 downward and to the other side. As a result, the limit switch 4 is turned off, and the ventilator stops or performs low-capacity operation.

As shown in FIG. 4, when the welding torch 2 is taken out of the holder portion 3 to perform welding, the holder portion 3 is hung down by gravity, and the limit switch lever portion 18 which is no longer pressed by the holder portion 3 is also moved. Droop. Then
When the limit switch 4 is turned on, the ventilator performs high-capacity operation, and harmful fumes generated during welding can be efficiently discharged from the workplace. When the welding is completed and the product is carried out to the next process by a conveyor or the like, if the welding torch 2 is inserted into the holder portion 3, the limit switch 4 is turned off again and the next welding is started.
The ventilator stops or performs low capacity operation.

FIG. 5 shows a ventilation system in a workplace where eight welding worktables 20 are installed. In this workplace, one to six of the eight welding worktables 20 can perform welding work at the same time according to the type, form, and number of products produced. One large ventilation device 21 is installed in the vicinity of the welding work table 20, and the torch holders 1 are respectively arranged close to each welding work table 20, and all the torch holders 1 are connected to the ventilation device via the sequencer 22. 21. In addition, the ventilation device 21
Eight hoods 23 branched by ducts are installed above the welding work table 20, respectively.

When the welding operation is performed by taking out the welding torch 2 from the holder portion 3 of the torch holder 1 within the range of 1 to 6 units, an operation signal is sent from the limit switch 4 turned ON to the ventilation device 21 through the sequencer 22. Is sent.
The ventilator 21 determines which welding work table 20 is performing the welding work, operates at a capacity corresponding to the number of the work tables, and via the hood 23 corresponding to the torch holder 1 to which the operation signal has been sent. Provide ventilation. When the limit switch 4 of the torch holder 1 is turned off, the ventilator 21 determines that welding has been completed at the corresponding welding worktable 20, changes the operating capacity, and moves the welding worktable 20 upward. The ventilation from the installed hood 23 is stopped.

As the sensor unit, a pressure sensor for detecting the weight of the welding torch stored in the holder unit, a photoelectric switch that operates when the welding torch stored in the holder unit blocks light, or the like may be used. However, as in the above-described embodiment, the use of a limit switch that switches between ON and OFF as a result of the holder moving depending on the presence or absence of a welding torch does not easily cause a malfunction. Also,
When the torch holders are installed on a plurality of welding worktables and these torch holders are connected to one ventilation device, the number of welding worktables and torch holders can be arbitrarily changed.

[0017]

According to the first aspect of the present invention, when welding is not performed and no harmful fume is generated, the welding torch is stored in the holder, and as a result, the ventilation device is automatically turned on. Since the operation is stopped or switched to the low-capacity operation, the running cost of the operation including the welding process can be reduced. In addition, when the welding torch is taken out of the holder portion when performing welding, the ventilator automatically operates at a high capacity, so that an accident due to poor ventilation can be prevented. further,
It is possible to save the trouble of switching the ventilation device by hand, and it can be adopted regardless of the type without any modification such as incorporating a separate device into the welding machine itself. According to the second aspect of the present invention, the holder switch moves by the weight of the stored welding torch and comes into contact with the limit switch, so that the changeover switch of the ventilation device is switched for the first time, so that a malfunction does not easily occur.

[Brief description of the drawings]

FIG. 1 is a side view of a torch holder showing an embodiment of the present invention.

FIG. 2 is a plan view of the above.

FIG. 3 is a side view of a torch holder in which a welding torch is stored.

FIG. 4 is a side view of a torch holder from which a welding torch is taken out.

FIG. 5 is a schematic diagram illustrating a ventilation system in a workplace provided with a plurality of welding worktables.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Torch holder 2 Welding torch 3 Holder part 4 Limit switch (sensor part) 5 Main body part 6 Mounting piece 7 Sleeve 8 Collar 9 Tapping screw 10 Bracket 11 Supporting material 12 Tapping plate 13 Supporting piece 14 Axis 15 Inclined wall part 16 Projecting part 17 Pin 18 Limit switch lever part 19 Cover 20 Welding work table 21 Ventilation device 22 Sequencer 23 Hood

Claims (2)

[Claims] 1. A device comprising: a holder capable of storing a welding torch; a sensor which senses the presence or absence of a welding torch in the holder and is connected to a changeover switch of a ventilator;
When the sensor unit senses that there is no welding torch in the holder unit, the changeover switch is turned on to operate the ventilator with high performance, and when the sensor unit senses that there is a welding torch in the holder unit. A torch holder for switching the changeover switch to stop of the ventilation device or low-capacity operation. 2. The holder unit is separated from the sensor unit when there is no welding torch inside, and is movable so as to come into contact with the sensor unit by its weight when the welding torch is stored inside, The sensor unit includes:
2. The torch holder according to claim 1, further comprising a limit switch that detects the presence of a welding torch in the holder when the holder contacts.