JP2015191017A - Arc welding operation discharge experience device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arc welding operation discharge experience device which allows a welding operator to safely lean risk of "the occurrence of short circuit arc" in the arc welding operation through experience, and allows the welding operator to surely learn power to foresee the risk.SOLUTION: An arc welding operation discharge experience device 100 comprises: a welded structure 10 formed in imitation of an actual welding object; a welding holder 20 for welding operation; a stun gun 30 generating spark discharge in a position facing a weld zone 11 of the welded structure 10; and a switch mechanism making the stun gun 30 ON or OFF. The switch mechanism is a contactless switch mechanism making the stun gun 30 ON or OFF when the welding holder 20 comes close to or separates from the weld zone 11, and comprises: a magnet 41 provided in the welding holder 20 as an accessory; a magnet sensor 42 arranged near the weld zone 11 and sending ON or OFF signal with approach or separation of the magnet 41; and a controller 40 making the stun gun 30 ON or OFF by the signal from the magnet sensor 42.

Description

  The present invention relates to an arc welding work discharge experience device that can simulate a discharge accident occurring during arc welding work in a safety education class for welding workers.

  Arc welding is a welding method that generates an arc between a metal material (base material) and a welding rod, and is a welding method that has been widely used as a joining means for iron-based materials. 1-3.) In arc welding, a welding holder with a welding rod attached is used, and welding is performed while melting both the base material and the welding rod.

JP 61-46396 A Japanese Unexamined Patent Publication No. 63-188474 JP-A-10-166146

  In arc welding work, if a part of the insulation coating of the welding holder holding the welding rod is missing, it is dangerous because a “short-circuit arc” occurs between the base metal and the welding holder. It is legally prohibited to perform arc welding using a welding holder in a state in which is missing (Article 329 of the Safety and Health Regulations).

  Therefore, from the viewpoint of preventing accidents and disasters during arc welding work, various safety and health classes are held for workers engaged in arc welding work. In such workshops, education is also given on the danger of short-circuit arcs caused by insulation defects such as missing insulation coatings and prevention of accidents. There are aspects that cannot be done.

  However, it is not easy to safely reproduce the occurrence of a “short-circuit arc” at the site of a safety and health seminar. Also, if a “short-circuit arc” is generated in a workshop, etc., intense rays and fumes are generated at the same time. Therefore, the worker must wear a protective eyeglass and a dust mask and take a class, and it is extremely difficult to experience and learn the danger of “short circuit arc” safely in a safety and health class.

  Therefore, the problem to be solved by the present invention is to provide an arc welding work discharge experience apparatus that can safely experience and learn the danger of short-circuit arc occurrence in arc welding work and can surely acquire the prediction ability for the danger. It is to provide.

  The arc welding work discharge experience apparatus of the present invention generates a spark discharge at a welded structure imitating an actual welding object, a welding holder for welding work, and a welded portion of the welded structure. And a switch mechanism for turning the discharge means on and off.

  With such a configuration, when the welding holder is brought close to the welded portion of the welded structure formed by imitating an actual welding location in an arc welding work class or the like, the switch mechanism is turned on to perform welding. A spark discharge can be generated in the vicinity of the part and can be observed by the trainee, so that the trainee who senses the sound and light generated by the spark discharge can experience the danger of short-circuit arc generation in arc welding work can do.

  The light associated with the spark discharge is not as intense as the arc discharge light, and no fumes are generated. Therefore, the lecturer can safely experience and learn without wearing protective glasses or a dust mask. Moreover, since the sound and light accompanying the spark discharge are unusual phenomena, the trainees who have observed this are strongly impressed and can surely acquire the ability to predict the danger. In addition to the welded portion, the discharging means can be provided, for example, in the vicinity of an earth clamp that forms a part of the power feeding path of the welding machine.

  As the switch mechanism, a method in which the user manually turns on / off, or a method in which the user turns on / off when the user performs a predetermined operation as described later can be adopted.

  Here, as the switch mechanism, a proximity switch mechanism for turning on / off the discharging means according to the approach / separation of the welding holder with respect to the welded portion can be provided.

  In this case, the proximity switch mechanism can be provided with a magnet attached to the welding holder and a magnet sensor that is arranged near the weld and transmits an ON / OFF signal in accordance with the approach / separation of the magnet. .

  On the other hand, a stun gun can be used as the discharging means.

  Moreover, the tubular member which has a notch-shaped welding part can be used as the said welded structure.

  According to the present invention, it is possible to provide an arc welding work discharge experience device capable of safely experiencing and learning the danger of “short-circuit arc occurrence” in arc welding work and reliably learning the predictive ability for the danger.

It is a partially abbreviated top view which shows the arc welding work discharge experience apparatus which is embodiment of this invention. It is a partially-omission front view which shows the arc welding work discharge experience apparatus seen from the arrow A direction in FIG. It is an enlarged view of the area | region shown by the arrow B in FIG. FIG. 4 is a partially omitted cross-sectional view taken along line CC in FIG. 3.

  Hereinafter, based on FIGS. 1-4, the arc welding work discharge experience apparatus 100 which is embodiment of this invention is demonstrated. As shown in FIGS. 1 to 4, the arc welding work discharge experience apparatus 100 includes a welded structure 10 imitating an actual welding object, a welding holder 20 for welding work, and a welded structure 10. A stun gun 30 that is a discharge means for generating a spark discharge at a position facing the welding portion 11 and a switch mechanism for turning the stun gun 30 on and off.

  The switch mechanism is a proximity switch mechanism that turns the stun gun 30 on and off by moving the welding holder 20 close to and away from the welding portion 11, and a magnet 41 attached to the welding holder 20 and the vicinity of the welding portion 11. And a magnet sensor 42 for transmitting an ON / OFF signal as the magnet 41 approaches / separates, and a control device 40 for turning on / off the stun gun by a signal from the magnet sensor 42.

  As shown in FIGS. 1 and 2, the welded structure 10 is a tubular member 12 having a notch-like welded portion 11, and is erected on the floor panel 13 so that the front view shape is a portal shape. The curved portion 12a is provided so that the shape in plan view is substantially V-shaped with an obtuse angle, and the welded portion 11 is provided in the vicinity of the curved portion 12a. A partition-like partition 14 that opens toward the front is arranged on the back side of the substantially fan-shaped floor panel 13 that opens toward the front, and a blindfold panel 15 is erected on the front side of the corner portion 14a of the partition 14. Have

  The control device 40 is placed on the shelf 17 provided in the space 16 surrounded by the corner portion 14 a of the partition 14 and the blindfold panel 15. Since the blindfold panel 15 is detachable from the partition 14, the front side of the space 16 can be opened and closed as necessary.

  On the front side of the floor panel 13, the switchboard 1, the welding machine 2, the power feeding cables 3, 4, and the like are arranged to imitate an actual welding work site. A welding holder 20 is attached to the tip of the power supply cable 3, and a welding rod 21 is set on the welding holder 20. A ground clamp 5 is attached to the tip of the power supply cable 4. The earth clamp 5 is disposed in the vicinity of the boundary between the tubular member 12 and the floor panel 13 constituting the welded structure 10. The switchboard 1, the welder 2, the power supply cables 3 and 4, the welding holder 20, the earth clamp 5, etc. are provided to create an atmosphere that is actually an actual welding work site. There is no need to (function).

  As shown in FIGS. 3 and 4, a stun gun 30 is disposed below the welded portion 11 in the tubular member 12, and a magnet sensor 42 and a battery 32 for operating the stun gun 30 are disposed in the vicinity of the stun gun 30. Yes. The stun gun 30 includes a high-frequency generator 33 that boosts the voltage of the battery 32, a pair of electrodes 34a and 34b that spark-discharge current generated by the high-frequency generator 33, and the like. The stun gun 30 and the magnet sensor 42 are electrically connected to the control device 40 by cables 30a and 42a, respectively.

  As shown in FIG. 4, an opening 19 b with an opening / closing door 19 a having the same outer shape as the peripheral surface of the tubular member 12 is provided in the lower surface side region of the welded portion 11 of the tubular member 12. Yes. The opening 19b can be opened and closed by rotating the open / close door 19a around the hinge 19c. As shown in FIGS. 3 and 4, an insulating portion 19 d formed of a nonconductive material (for example, a vinyl chloride material) is provided in a region surrounding the welded portion 11 of the tubular member 12. The insulating part 19d is formed so as to be integrated with the tubular member 12 in appearance.

  As shown in FIG. 4, the magnet sensor 42 is arranged in a state as close as possible to the outer peripheral surface of the insulating portion 19 d in order to avoid poor sensing with respect to the magnet 41. In the present embodiment, a part of the insulating portion 19d is hollowed out, the magnet sensor 42 is attached, the gap is filled with putty, and then painted with the same color as the peripheral member. However, the present invention is not limited to this.

  Further, as shown in FIG. 2, a notch-shaped opening 18 similar to the welded portion 11 is provided at the left lower end portion of the tubular member 12, and is located at a position facing the opening 18 in the tubular member 12. A stun gun 31 is arranged. The stun gun 31 is also electrically connected to the control device 40 by a cable 31a.

  Here, the usage of the arc welding work discharge experience apparatus 100, the effect, etc. are demonstrated. When the arc welding work discharge experience device 100 is used in a state in which a part of the insulating coating 22 of the welding holder 20 that holds the welding rod 21 is missing, a “short circuit” occurs between the base material (welded portion 11) and the welding holder 20. It is a device for experiencing and learning that there is danger due to the occurrence of "arc" and that there is danger due to the occurrence of "short-circuit arc" in the vicinity when the earth clamp 5 and the base metal are poorly connected. .

  In an arc welding work class or the like, after setting the arc welding work discharge experience apparatus 100 as shown in FIG. 1, as shown in FIG. When approaching the welding part 11, the magnet sensor 42 detects the magnetic force of the magnet 41 attached to the welding holder 20, and the signal is transmitted to the control apparatus 40 (refer FIG. 1). Upon receipt of the detection signal, the control device 40 transmits an ON signal to the stun gun 30, whereby the stun gun 30 automatically operates, and the “barb” and “bachi” between the electrodes 34 a and 34 b located at the position facing the welded portion 11. A spark discharge with sound and light occurs.

  As described above, when the welding holder 20 with the insulating coating 22 partially missing is brought close to the welded portion 11 of the welded structure 10 formed to imitate an actual welded portion, the electrodes 34a and 34b in the vicinity of the welded portion 11 are used. In the meantime, a spark discharge is automatically generated and can be observed by the trainee. Therefore, the trainee who has sensed the sound and light generated with the spark discharge can experience and learn the danger of short-circuit arc generation in arc welding work.

  The light accompanying the spark discharge generated between the electrodes 34a and 34b is not as intense as the light of the actual arc discharge and does not generate fumes, so the trainer can safely do so without wearing protective glasses or a dust mask. Experience learning is possible. In addition, the sounds and lights of “barbari” and “beeps” that accompany the spark discharge are an extraordinary phenomenon. The ability can be acquired with certainty.

  On the other hand, when the welding holder 20 is separated from the welded portion 11, the magnet sensor 42 detects the signal, and the signal is transmitted to the control device 40 (see FIG. 1), and the control device 40 transmits an OFF signal to the stun gun 30. The stun gun 30 automatically stops and the spark discharge disappears.

  Furthermore, as shown in FIGS. 1 and 2, the arc welding work discharge experience device 100 is arranged in a tubular member 12 in the vicinity of the earth clamp 5 when the welding holder 20 is brought close to the welded portion 11 of the welded structure 10. The stun gun 31 is activated and has a function of generating a spark discharge between a pair of electrodes (not shown) provided at a position facing the opening 18 near the earth clamp 5. Therefore, the trainee who has sensed the sound and light generated by the spark discharge of the stun gun 31 also learns the danger of short-circuit arc generation during arc welding work caused by poor conduction between the ground clamp 5 and the base material. be able to.

  The arc welding work discharge experience device 100 described based on FIGS. 1 to 4 shows an example of the present invention, and the arc welding work discharge experience device of the present invention is the arc welding work discharge experience device 100 described above. It is not limited to.

  The arc welding work discharge experience apparatus of the present invention can be widely used in arc welding workshops and the like attended by employees who perform arc welding work in the fields of various machine metals and other industries.

DESCRIPTION OF SYMBOLS 1 Switchboard 2 Welding machine 3, 4 Power supply cable 5 Ground clamp 10 Welded structure 11 Welded part 12 Circular tubular member 12a Curved part 13 Floor panel 14 Partition 14a Corner part 15 Blindfold panel 16 Space 17 Shelf part 18, 19b Opening part 19a Opening and closing Door 19c Hinge portion 19d Insulating portion 20 Welding holder 21 Welding rod 22 Insulation coating 30, 31 Stun gun 30a, 31a, 42a Cable 32 Battery 33 High frequency generator 34a, 34b Electrode 40 Control device 41 Magnet 42 Magnet sensor 100 Arc welding work discharge experience apparatus

Claims (5)

  A welding structure imitating an actual object to be welded, a welding holder for welding work, a discharge means for generating a spark discharge at a welded portion of the welded structure, and turning on the discharge means An arc welding work discharge experience device characterized by comprising a switch mechanism for turning off.   The arc welding work discharge experience apparatus according to claim 1, wherein a proximity switch mechanism is provided as the switch mechanism to turn on and off the discharge means as the welding holder approaches / separates the welded portion.   3. The proximity switch mechanism according to claim 2, further comprising: a magnet attached to the welding holder; and a magnet sensor disposed in the vicinity of the weld and transmitting an ON / OFF signal in accordance with the approach / separation of the magnet. Arc welding work discharge experience device.   The arc welding work discharge experience device according to any one of claims 1 to 3, wherein a stun gun is used as the discharge means.   The arc welding work discharge experience device according to any one of claims 1 to 4, wherein a tubular member having a notch-shaped weld is used as the welded structure.

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