JP6021172B2 - Traveling cart - Google Patents

Description

  The present invention relates to a traveling carriage capable of easily positioning a mounted welding torch or cutting torch with respect to a starting point of welding or cutting when starting welding or cutting a steel plate.

  2. Description of the Related Art Steel plates are welded or cut using a traveling carriage equipped with a torch such as a welding torch or a plasma cutting torch or a gas cutting torch. A power cord is connected to such a traveling carriage, a cap tire cable and a hose for supplying gas are connected to a welding torch, and a cap tire cable, a fuel gas hose, an oxygen gas hose, etc. ) Is connected. These hoses are towed as the traveling carriage travels.

  The hoses connected to the traveling carriage and the mounted torch become resistance when the traveling carriage travels, and there is a problem that the traveling carriage is prevented from being stably driven. For this reason, in order to increase the traction force and realize stable traveling, it is general to arrange a magnet on the traveling carriage so as to attract the steel plate. However, when the magnet's attractive force is increased, stable traction can be realized, but when a series of work is completed and the traveling carriage is detached from the steel plate, there arises a problem that peeling from the steel plate becomes difficult. ing.

  In order to solve the problems as described above, there has been proposed a traveling carriage configured to change the attraction of the steel plate by changing the position or posture of the magnet (see, for example, Patent Document 1). In the traveling cart described in Patent Document 1, by operating the lever, the posture or position can be changed so that the magnet built in the casing of the traveling cart approaches the steel plate or is separated from the steel plate. And when the magnet is brought close to the steel plate, high attraction is realized and stable running is possible while pulling the hoses, and when the magnet is separated from the steel plate, the suction to the steel plate is released and easily separated. It is possible.

  When welding or cutting a steel plate using the traveling carriage described in Patent Document 1, the operator grips the lever and transports it to the start point of the desired welding or cutting, and matches the mounted welding torch or cutting torch. After that, the lever is operated to bring the magnet close to the steel plate and attract it. In this state, the magnet brought close to the steel plate exhibits high attraction, and does not move easily even if force is applied to the traveling carriage from the outside in the traveling direction. Then, the target welding or cutting can be performed by operating the welding torch or the cutting torch and running the traveling carriage. At this time, the traveling carriage can travel at a stable speed by the action of the magnet.

Japanese Patent No. 25589657 (Japanese Patent Laid-Open No. 07-027609)

  When starting welding or cutting to a steel plate, it is necessary to match the mounted welding torch or cutting torch with the starting point. However, when the traveling carriage carried by the worker is placed on the steel plate, the welding torch or cutting torch that is mounted as it is rarely coincides with the starting point, and the actual situation is that fine adjustment is always necessary.

  When the position of the traveling carriage is adjusted so that the welding torch or cutting torch coincides with the starting point of welding or cutting, it is only necessary to release the suction of the magnet to the steel plate and move it. However, many hoses connected to the traveling carriage and the welding torch or cutting torch are dragged on the steel plate with the movement of the traveling carriage to become resistance, so that it is difficult to move the running carriage finely. The problem has arisen.

  In order to move the traveling carriage slightly, the traveling carriage may be moved at a very low speed while the suction of the steel plate by the magnet is maintained. However, when performing welding or cutting, it is necessary to maintain the welding speed or cutting speed set according to the welding conditions (butt welding, fillet welding, etc.) and the thickness of the steel sheet to be welded or cut. Generally, it is set before starting welding or cutting. Prior to the start of welding or cutting, it is not preferable to change the preset traveling speed in order to make the welding torch or cutting torch coincide with the welding or cutting start point.

  From the above points, when starting welding or cutting to a steel sheet, it is actually necessary to develop a traveling carriage that can facilitate the work of matching the mounted welding torch or cutting torch with the starting point. .

  An object of the present invention is to provide a traveling carriage that can easily match a mounted welding torch or cutting torch with a starting point of welding or cutting when the traveling carriage is placed on a steel plate.

In order to solve the above-described problems, a traveling carriage according to the present invention has a torch for welding or cutting a steel plate and has a magnet that attracts the steel plate, and can travel while attracting the steel plate by the magnet. A driving carriage configured to drive a driving carriage;
A slow switch provided corresponding to the direction in which the traveling carriage is driven, an operation button for generating a signal for causing the traveling carriage to travel at a preset welding speed or cutting speed, and the operation button that is turned on and is operated When the drive motor is in a non-rotating state and the fine speed switch is operated without generating a signal from the above, the traveling carriage is caused to travel at a speed lower than a preset welding speed or cutting speed in a corresponding direction. And a control unit that controls the drive motor.

Further, the control unit of the traveling carriage is configured to control the drive motor so that the traveling speed of the traveling carriage gradually increases to a preset speed in response to the continuation of the signal generated from the slow speed switch. ing.

In the traveling carriage, the slow speed switch includes push button switches provided at both ends in the traveling direction of the traveling carriage, and the push button of the push button switch protrudes from an end portion in the traveling direction of the traveling carriage. The control unit is configured so that when the power is turned on and the drive motor is in a non-rotating state, when the signal is generated from a push button switch provided at any end of the traveling direction of the traveling cart, the traveling cart is The drive motor was controlled to run at a speed lower than the set welding speed or cutting speed, and a signal was generated from a push button switch provided at the end on the downstream side in the running direction when the running carriage was running. At this time, it is preferable to control the drive motor so that the traveling carriage stops.

  In the traveling vehicle according to the present invention, the mounted torch for welding or cutting can be easily aligned with the starting point of welding or cutting even when the steel plate is attracted by the magnet. That is, when the traveling carriage is powered on and the drive motor is in a non-rotating state, by operating the fine speed switch, the speed is set in a preset direction and lower than the preset welding speed or cutting speed. A traveling cart can be driven.

  For this reason, it is not necessary for the operator to move the traveling cart by hand by releasing the magnet suction, and it is possible to run the traveling cart at a low speed by a simple operation of operating the slow speed switch. The torch can be easily and reliably aligned with the starting point.

  When the power switch is turned on and the drive motor is in the non-rotating state, signals are generated from the push button switches provided at either end when the slow switch is a push button switch provided at both ends of the traveling direction of the carriage. When it is configured to make the traveling carriage run at a low speed and stop when a signal is generated from the push button switch provided at the end on the downstream side in the running direction, make one push button switch function as a fine speed switch. The push button switch on the opposite side can function as a limit switch that limits travel.

  In addition, as the signal generated from the slow speed switch continues, the traveling speed of the traveling carriage gradually increases from a low speed to a preset speed, so even if the distance from the torch to the starting point is large, it can be easily done in a short time. The traveling carriage can be made to travel so that the torch matches the starting point.

It is a three-view figure explaining the structure of the traveling vehicle which concerns on a present Example. It is a block diagram of the traveling vehicle which concerns on a present Example.

  Hereinafter, the traveling cart according to the present invention will be described. The present invention is a traveling carriage used when a torch such as a welding torch or a cutting torch is mounted to weld or cut a steel sheet, and is configured to be able to travel at a stable speed by attracting the steel sheet with a magnet. ing. In particular, after the traveling carriage is placed on the steel plate, the mounted torch can be matched with the target welding or cutting start point by a simple operation.

  Various types of welding torches including a torch for performing carbon dioxide arc welding, a torch for performing plasma welding, and the like can be selectively employed as a torch mounted on a traveling carriage for welding steel plates. . These torches are connected to a power source via a cap tire cable and connected to a gas supply device via a hose.

  Moreover, as a torch for cutting a steel plate mounted on a traveling carriage, a torch for performing gas cutting, a torch for performing plasma cutting, or the like can be selectively employed. A gas cutting torch is connected to a fuel gas supply device and an oxygen gas supply device via a plurality of hoses, and a plasma cutting torch is connected to a power source via a cap tire cable and a plasma gas supply device via a hose. Connected.

  The hoses including the power cord, the cap tire cable, and the hose are pulled on the steel plate as the traveling carriage travels.

  Hereinafter, the traveling carriage A according to the present embodiment will be described with reference to FIGS. 1 and 2. The traveling carriage A according to the present embodiment can travel in the directions of arrows a and b by mounting a carbon dioxide welding torch as the torch B, and the torch B along with traveling in the directions of the arrows a and b. It is comprised so that it can weld linearly by operating.

  The traveling carriage A has a casing 1 in which a plurality of wheels 2 that rotate in contact with a steel plate are arranged on the lower side. In addition, a magnet 11 configured to change its posture or position in accordance with the turning operation of the lever 11a is disposed inside the casing 1. The lever 11a is configured such that a handle 11b provided at the upper end is refracted toward the upper side of the casing 1 and can rotate around a rotation center (not shown).

  In addition, the magnet 11 is attached to the lower end side of the lever 11a directly or via a link mechanism, and the handle 11b is gripped and rotated to rotate the magnet 11 to change the posture, or It is possible to change the position by translation. And by making the magnet 11 approach the grounding surface (steel plate) side of the wheel 2 and making it parallel to the steel plate, the steel plate is attracted, or by separating the magnet 11 approaching in a posture parallel to the steel plate. It is possible to release the suction to the steel plate.

  Although the magnitude | size of the attraction | suction force with respect to the steel plate of the magnet 11 is not specifically limited, It is necessary to have an attraction | suction force which can pull the hose connected to the traveling cart A stably. For this reason, when the steel plate is attracted by the magnet 11, the traveling carriage A maintains its position regardless of the action of the external force.

  The casing 1 is provided with a drive motor 27 (described later), a transmission device (not shown) that transmits the rotation of the drive motor 27 to the wheels 2, a control device 25 (described later), and the like.

  An operation panel 3 is provided on the upper surface of the casing 1. The operation panel 3 includes a connector 4 to which a power cord (not shown) is connected, a selection switch 5, a data dial 6, an operation button 7, and a data display unit 8. Has been placed.

  The selection switch 5 displays the traveling direction of the traveling carriage A, the number of reciprocations per unit time of the torch B (oscillation frequency), the standby time at the maximum amplitude point, the current day work information or the several day work history information. Whether or not to display the operation of the welding apparatus. Then, after selecting the operation of the welding apparatus with the selection switch 5, the traveling speed is changed by operating the data dial 6 and / or the operation button 7, the oscillating frequency is set, and the maximum amplitude point of the torch B is set. It is possible to adjust the waiting time and display the work history information stored in the control device 25 on the data display unit 8.

  The data dial 6 changes, for example, the traveling speed of the carriage A, changes the oscillation frequency of the torch B, or changes the waiting time at the maximum amplitude point according to the operation content selected by the selection switch 5, and the control device All the values of the work history information stored in 25 are displayed on the data display unit 8.

  The operation button 7 has a function of starting or stopping the operation of the welding apparatus and a function of determining an operation selected by the selection switch 5 or a numerical value changed by the data dial 6.

  The data display unit 8 displays the traveling speed of the carriage A, the oscillation frequency of the torch B, the standby time at the maximum amplitude point of the torch B, etc. set by the cooperation of the selection switch 5, the data dial 6, and the operation button 7. The operation information or work history information such as the welding length by the torch B and the traveling distance of the traveling carriage A is displayed.

  Slow speed switches 9 and 10 are provided on the side surface of the casing 1 opposite to the surface on which the torch B is disposed. These slow switches 9 and 10 are in a non-rotating state when the power is supplied to the traveling carriage A and the control device 25 is in operation, and the rotation command at the welding speed is not issued to the drive motor 27. In some cases, the traveling carriage A is caused to travel at a speed lower than the welding speed.

  The slow switches 9 and 10 are provided corresponding to the traveling direction of the traveling carriage A. That is, the slow switch 9 is provided in correspondence with the traveling carriage A traveling in the direction of arrow a, and the slow speed switch 10 is provided in correspondence with traveling of the traveling carriage A in the direction of arrow b. Accordingly, when a power cord (not shown) is connected to the connector 4 and the fine speed switch 9 or 10 is pushed without operating the operation button 7, the traveling carriage A is set in the direction set to the operated fine speed switch 9 or 10. Drive at a low speed.

  Push button switches 12 and 13 are arranged in a protruding state on both end faces in the running direction of casing 1 (both end faces in the directions of arrows a and b), respectively. The push button switches 12 and 13 have a function as a limit switch that generates a signal by colliding with a collision member or a standing plate (not shown) provided at a position corresponding to the end portion of the target weld line.

  For this reason, when the signal generated from the push button switch 12 or 13 is transmitted to the control device 25, it is possible to recognize that the traveling carriage A has reached the travel limit by the control device 25. Furthermore, after recognizing that the traveling carriage A has reached the traveling limit, it is possible to end the welding in accordance with a preset and preselected operation program.

  That is, when a signal is generated from the push button switches 12 and 13, it is possible to stop the welding by stopping the traveling carriage A and at the same time energizing the torch B according to the signal. In addition, after stopping the traveling carriage A, it is possible to continue welding to the position corresponding to the end of the traveling carriage A by moving only the torch B in the traveling direction of the traveling carriage A. Furthermore, after the welding of a preset welding length is completed, the crater process can be performed by moving the torch B in the reverse direction and reducing the welding current to perform welding.

  A stand 15 is provided on the upper part of the casing 1, and a torch holder 16 configured to be adjustable in the vertical direction and in the directions of the arrows c and d is held by the stand 15. A welding torch B is held on the torch holder 16. Therefore, the welding torch B is configured to be set at desired positions in the vertical direction and the exit / entry direction (arrow c and d directions) on the side surface of the casing 1 by operating the stand 15.

  A pair of guide rollers 18 are disposed on the surface of the casing 1 where the welding torch B is disposed, with the welding torch B interposed therebetween. The guide roller 18 is rotatably supported by a support arm 19 configured so that the size of the entrance and exit can be adjusted with respect to the casing 1, and is in contact with a guide (not shown) provided along a target welding line. The travel direction of A can be guided.

  Next, the control system of the traveling carriage A will be described with reference to the block diagram of FIG.

  In the figure, reference numeral 25 denotes a control device which has a function of monitoring and controlling the driving state of the driving motor 27 of the traveling carriage A and the operating state of the torch B. The control device 25 includes an input unit 25a that receives various signals, an output unit 25b that outputs various data, and an arithmetic processing unit 26.

  The input unit 25a is a signal generated according to the index selected by the selection switch 5, a signal associated with the operation of the data dial 6, a signal from the operation button 7, a signal from the slow speed switches 9, 10, and the push button switches 12, 13 And a signal from a rotary encoder 28 that detects the rotation of the drive motor 27 are input. The output unit 25 b outputs a drive signal for the drive motor 27 and a signal for the torch drive device 29 that drives the torch B, the data display unit 8, and the transmission unit 30.

  The calculation processing unit 26 includes a measurement calculation unit 26a, a data storage unit 26b, a specified value storage unit 26c, and a comparison determination unit 26d. The measurement calculation unit 26a measures rotation data from the rotary encoder 28 input via the input unit 25a to calculate the travel distance of the traveling carriage A, and selects the welding mode by the selection switch 5 and the operation button 7. In response to this signal, the time of the built-in timer is measured to calculate operation data consisting of the operation time of the torch B, and the welding length is calculated from these calculation results.

  The data storage unit 26b stores the data calculated by the measurement calculation unit 26a, and the welding length calculated by the travel distance of the traveling carriage A, the operating time of the torch B, the speed of the traveling carriage A, and the operating time of the torch B. Data of work history information including the like is stored.

  The specified value storage unit 26 c stores an operation program of the traveling carriage A including an operation program of the torch drive device 29 and corresponds to a limit value of the rotational speed of the drive motor 27 to be subjected to maintenance inspection or maintenance inspection of the drive motor 27. The stored maintenance information and the specified value information including the maintenance information corresponding to the limit value of the operating time of the torch B to be subjected to the maintenance inspection of the torch B are stored.

  In particular, the operation program of the traveling carriage A stored in the specified value storage unit 26c monitors the current rotation state of the drive motor 27 and the presence / absence of a signal from the slow speed switch 9 or 10, and the drive motor 27 does not rotate. When a signal is generated from the slow switch 9 or 10 in the state, the rotation direction of the drive motor 27 is set corresponding to the slow switch 9 or 10 that generated the signal, and is generated from the slow switch 9 or 10. The increase rate is set so as to gradually increase the rotational speed of the drive motor 27 as the duration of the signal is increased.

  The comparison determination unit 26d compares the rotation data or operation data stored in the data storage unit 26b with the information including the maintenance information of the traveling carriage A or the maintenance information of the torch B stored in the specified value storage unit 26c. . That is, the cumulative travel distance of the traveling carriage A and the prescribed value stored in the prescribed value storage unit 26c or the cumulative operating time of the torch B are compared with the prescribed value to determine whether or not the accumulated value exceeds the prescribed value. When the accumulated value exceeds the specified value, an alarm signal is output to the transmission unit 30 via the output unit 25b.

  A drive motor 27 drives the wheels 2 of the traveling carriage A. The rotation of the drive motor 27 is detected by a rotary encoder 28, and rotation data corresponding to the number of pulses of the rotary encoder 28 can be generated. The rotation data is input to the calculation processing unit 26, and the rotation number is measured by the measurement calculation unit 26a and the travel distance of the traveling carriage A is measured. The measured data can be stored in the data storage unit 26b. Yes.

  Further, based on the presence / absence of a pulse generated from the rotary encoder 28, the arithmetic processing unit 26 determines whether the drive motor 27 is in a non-rotating state or a rotating state. When the signal from the slow speed switch 9 or 10 is generated in the state where the drive motor 27 is determined to be in the non-rotating state, the drive motor 27 is driven based on the operation program, and the traveling carriage A is switched to the slow speed switch. Drive at a low speed in the direction corresponding to 9 or 10.

  The signal generated from the slow switch 9 or 10 is measured by a built-in timer, and the rotational speed of the drive motor 27 is increased as the duration time increases. The rotation data accompanying the rotation of the drive motor 27 is processed as described above, and the rotation speed of the drive motor 27 is gradually increased until the traveling speed of the traveling carriage A becomes equal to the preset welding speed.

  Reference numeral 29 denotes a torch drive device for driving the torch B, a valve mechanism for supplying and shutting off gas to the torch B, a power supply device for energizing the torch B, a wire supply device, and a torch swing device for swinging the torch B. It is comprised by combining the apparatus required in order to progress the welding operation containing.

  The torch drive device 29 is configured by combining various devices according to the type of mounted torch. That is, when the torch is a carbon dioxide gas welding torch, it is configured by the equipment as described above. Further, when the torch is a plasma welding torch, a valve mechanism for supplying and shutting off plasma gas to the torch, a valve mechanism for feeding and shutting cooling water to the torch, a torch, and a workpiece The power supply device selectively energizes, a wire supply device, and a torch swing device that swings the torch at a preset oscillation frequency.

  When the torch is a gas cutting torch, the torch is configured to have a valve mechanism that supplies and shuts off fuel gas, preheated oxygen gas, and cutting oxygen gas to the torch. Further, when the torch is a plasma cutting torch, a valve mechanism for supplying and shutting off plasma gas to the torch, a valve mechanism for feeding and shutting cooling water to the torch, a torch, and a workpiece are selected. It is comprised by apparatuses, such as a power supply device which supplies electricity electrically, and a wire supply apparatus.

  The torch drive device 29 starts to operate in response to a drive signal from the control device 25. When operating the torch B, the welding switch is selected by the selection switch 5, and then a signal generated by pressing the push button switch 7 is transmitted to the control device 25. In the control device 25, the measurement calculation unit 26a starts measuring the timer in response to this signal, and simultaneously outputs a drive signal to the torch drive device 29, and the torch drive device 29 starts operating by this drive signal. Welding is started. Therefore, in this embodiment, the operation detection member for detecting the operation state of the torch B is constituted by the selection of the welding mode by the selection switch 5, the operation button 7, and a built-in timer (not shown).

  The transmission unit 30 transmits data of work history information including the travel distance of the traveling carriage A, the operating time of the torch B, the welding length, etc. stored in the data storage section 26b, or the cumulative travel distance and drive of the traveling carriage A When the cumulative number of revolutions of the motor 27, the cumulative operating time of the torch B, etc. exceed the values to be inspected and stored in the specified value storage unit 26c, an alarm is output according to the alarm signal output from the control device 25. It is what you send.

  For this reason, the transmission unit 30 has a communication function for stored data or a function for transmitting to the worker that any of the traveling carriage A, the drive motor 27, and the torch B is in a state to be inspected. It ’s fine. For example, an infrared transmitter is preferably used as the transmitter 30 having a communication function for stored data. Moreover, as the transmitter 30 having a function of transmitting an alarm, an alarm is displayed on the data display unit 8 and / or an alarm lamp or alarm sound generator made of a red lamp (not shown) is provided on the operation panel 3, It is preferable that a signal is transmitted in response to an alarm signal so that the alarm lamp is turned on or blinked and a sound is generated from an alarm sound generator.

  In the present embodiment, as the transmission unit 30, a communication device having a function of communicating data stored in the data storage unit 26b by infrared operation through the cooperative operation of the selection switch 5, the data dial 6, and the operation button 7, and a comparison determination unit 26d. There are provided two devices: a data display unit 8 and / or an alarm display device having a function of displaying or generating an alarm such as an alarm lamp or an alarm sound generator (not shown) by a signal from.

  Therefore, after the welding of one day is completed, the work history stored in the data storage unit 26b is displayed on the data display unit 8 and confirmed, and the daily work report is collected by infrared communication from the transmission unit 30 and taken into the notebook computer. Is possible.

  Further, when an alarm signal is generated from the control device 25, it is possible to continue the current welding and a series of operations, and after these welding operations are completed, it is possible to prevent a new welding operation from being entered. is there. By preventing new welding work from entering in this way, it is possible to reliably perform maintenance and inspection work in response to the generated alarm signal, and it is possible to always use the welding equipment in good condition. It becomes.

  Next, an operation for making the torch B mounted on the traveling carriage A configured as described above coincide with the welding start point will be described.

  Prior to starting the welding, the handle 11b is gripped and the traveling carriage A is conveyed, installed along the target welding line on the steel plate, and the attitude of the torch B is adjusted. Thereafter, the lever 11a is rotated to bring the magnet 11 closer to the steel plate in a parallel posture. As a result, the traveling carriage A does not move easily by sucking the steel plate.

  Next, the power cord is connected to the traveling carriage A, the power is turned on, and hoses are connected to the mounted torch B. In this state, the traveling carriage A is stopped, and the control device 25 determines that the drive motor 27 is in a non-rotating state.

  It is confirmed whether or not the tip of the torch B coincides with the starting point of welding on the steel sheet. If not, the traveling carriage A is caused to travel in the direction in which the tip of the torch B coincides with the starting point. That is, the traveling direction (the direction of the arrow a or the arrow b in FIG. 1) is checked in order to make the tip of the torch B coincide with the welding start point, and the slow switch 9 or 10 corresponding to the confirmed direction is operated. To do.

  A signal corresponding to the operation of the slow switch 9 or 10 is transmitted to the control device 25, the control device 25 determines that the drive motor 27 is in a non-rotating state, and a signal from the slow switch 9 or 10 is generated. Is determined, the drive motor 27 is driven in a direction corresponding to the operated fine speed switch 9 or 10 in accordance with a preset operation program of the traveling carriage A. As a result, the traveling carriage A travels at a low speed in the direction set in the fine speed switch 9 or 10.

  The traveling speed of the traveling carriage A associated with the operation of the slow speed switches 9 and 10 is not limited, and is preferably sufficiently lower than the traveling speed when performing welding or cutting set in advance. In particular, when the distance between the tip of the torch B and the welding start point is small and the traveling carriage A can be matched by slightly moving the traveling carriage A, the traveling carriage A is caused to travel accurately at low speed. It becomes possible.

  In addition, when the interval between the welded parts is substantially equal to the weld length as in zigzag welding, when moving to the next welding point after the welding of one place is completed, the suction of the steel plate by the magnet 11 is released. In some cases, it is preferable to run the traveling carriage A rather than transport it. For this reason, by continuing the operation of the slow speed switches 9 and 10, it is possible to make the torch B mounted by continuing the traveling of the traveling carriage A coincide with the next welding start point. In this case, it is not necessary to keep the traveling speed when moving from the welding end point to the adjacent welding part at a low speed, and when the signal generated from the fine speed switch 9 or 10 continues, the signal continues. It is possible to gradually increase the speed in accordance with.

  That is, when the traveling carriage A is driven at a low speed, the slow speed switches 9 and 10 are operated intermittently, and when the traveling carriage A is driven faster, the slow speed switches 9 and 10 are continuously operated. Is possible. When the traveling speed of the traveling carriage A is gradually increased by continuously operating the slow speed switches 9 and 10, the maximum speed limit is not limited, but it is preferable to limit the preset welding speed. .

  Note that when the slow speed switch 9 or 10 is operated to cause the traveling carriage A to travel at a low speed so that the torch B coincides with the welding start point, the push button switch 12 or 13 may come into contact with an obstacle. In this case, a signal generated from the push button switch 12 or 13 in contact with the obstacle is transmitted to the control device 25. The control device 25 determines that the traveling carriage A has contacted the obstacle, and drives based on this determination. The driving of the motor 27 is stopped and displayed on the display unit 8 to alert the surrounding attention.

  After matching the torch B mounted on the traveling carriage A to the welding start point as described above, the selection switch 5 is operated to select the welding mode for the steel sheet, and then the operation button 7 is operated. A drive signal is output from the control device 25 to the torch drive device 29 to start welding, and at the same time, the operating time of the torch B is measured.

  After a predetermined time has elapsed since the start of welding, a drive signal is generated for the drive motor 27, the drive motor 27 starts rotating, and a pulse signal is transmitted from the rotary encoder 28 to the control device 25 along with this rotation. At the same time, the traveling carriage A starts traveling.

  Simultaneously with the start of welding by the torch B, a timer is measured by the measurement calculation unit 26a, the operating time of the torch B is calculated, and the calculation result is stored in the data storage unit 26b. Further, a pulse signal from the rotary encoder 28 generated along with the rotation of the drive motor 27 is also measured by the measurement calculation unit 26a, and the travel distance of the traveling carriage A according to the rotation speed of the drive motor 27 and the rotation speed of the drive motor 27. Is calculated, and the calculation result is stored in the data storage unit 26b.

  Further, when the data stored in the data storage unit 26b is displayed on the data display unit 8, the data to be displayed is selected by operating the selection switch 5 and the data dial 6, and the operation button 7 is operated and determined. The data to be displayed includes the travel distance of the last traveling carriage A, the travel distance of the traveling carriage A for one day, the travel distance of the traveling carriage A in the specified period, the operating time of the immediately preceding torch B, and the last welding length. , There is data including the operating time of the torch B for one day, the welding length for one day, the welding length for the specified period, etc. By doing so, it is possible to collect data.

  In addition, the data displayed on the data display unit 8 can be communicated to the notebook computer via the transmitter 30 by infrared communication.

  Further, in the comparison / determination unit 26d, the operation time data of the torch B stored in the data storage unit 26b, the specified value of the operation time stored in the specified value storage unit 26c, and the rotation speed of the drive motor 27 are stored. The data and the specified value of the rotational speed stored in the specified value storage unit 26c, the data of the travel distance of the traveling carriage A, and the specified value of the travel distance stored in the specified value storage unit 26c are respectively compared. If the corresponding specified value is not exceeded, welding is performed continuously.

  When it is determined that any one of the operating time data of the torch B, the rotational speed data of the driving motor 27, and the traveling distance data of the traveling carriage A exceeds the corresponding specified value, a series necessary for the current welding is performed. It is determined whether or not the above work has been completed. If a series of work has not been completed, this work is continued.

  When it is determined that a series of welding operations have been completed, an alarm signal is generated from the control device 25, and a signal is transmitted from the transmitter 30 in response to the alarm signal. Based on this signal, the data display unit 8 In addition, an alarm that turns on or flashes an alarm lamp and generates a sound from an alarm sound generator to be noticed by an operator is generated.

  The restart of the welding equipment is prohibited at the same time as the alarm is generated. For this reason, it is not possible to continuously perform new welding work, perform maintenance inspection work set in advance for the traveling carriage A and torch B, and input that the maintenance inspection work is completed, It is possible to enter a new welding operation. As mentioned above, maintenance and inspection work is to ensure that the welding equipment can perform the desired welding in good condition. By performing this maintenance and inspection work, always use the welding equipment in good condition. Is possible.

  Further, every time welding is performed, data such as the travel distance data of the traveling carriage A, the operation time data of the torch B, and the rotational speed data of the drive motor 27 stored in the data storage unit 26b are stored as data. It can be displayed on the display unit 8 and taken into a notebook computer. Then, by collecting the data captured in the notebook computer in this way, it becomes possible to eliminate the error of the worker, create a reliable daily work report, and collect the work results of individual welding equipment. .

  Next, another example of the traveling carriage A will be described with reference to FIG.

  As another embodiment of the traveling carriage A, the push button switches 12 and 13 arranged on both end faces in the traveling direction of the casing 1 (both end faces in the directions of arrows a and b) are used as a fine speed switch. Accordingly, in this embodiment, the slow switches 9 and 10 shown in FIG. 1 do not exist, and the push button switches 12 and 13 can function as the slow switches, respectively.

  That is, when the power of the traveling carriage A is turned on, the control device 25 confirms the presence or absence of a pulse signal generated from the rotary encoder 28 of the drive motor 27 to check whether the drive motor 27 is in a non-rotating state or a rotating state. Determine whether it is in When a signal is generated from the push button switch 12 or 13 when it is determined that the drive motor 27 is in the non-rotating state, the control device 25 determines that the generated signal is a signal for causing the traveling carriage A to travel at a low speed. To do. Then, it is determined from which of the push button switches 12 or 13 the signal is generated, and based on this determination, the drive motor 27 is driven to move the traveling carriage A in the low speed direction.

  When the control device 25 determines that the drive motor 27 is rotating based on the pulse signal generated from the rotary encoder 28 of the drive motor 27, a signal is generated from the push button switch 12 or 13. At this time, the control device 25 determines that the traveling carriage A has reached the traveling limit. Then, based on this determination, the drive of the drive motor 27 is stopped and the travel of the traveling carriage A is stopped.

  Therefore, the push button switches 12 and 13 have a function as a limit switch that generates a signal by colliding with a collision member or a standing plate (not shown) provided at a position corresponding to the end portion of the target welding line. . When a signal is generated from the push button switch 12 or 13, it is possible to stop the welding by stopping the traveling carriage A and at the same time energizing the torch B according to this signal.

  As described above, depending on whether or not the drive motor 27 is currently rotating, the push button switches 12 and 13 are selectively provided with a function as a slow switch or a function as a limit switch for detecting obstacles. It is possible to demonstrate.

  In the present embodiment, a push button switch that has been used as a limit switch for detecting obstacles in a conventional traveling carriage can be used as a slow switch or as a limit switch depending on the determination of the rotation state of the drive motor 27. Is possible. For this reason, it is possible to constitute a traveling cart that can make the mounted torch B coincide with the starting point of welding or cutting by increasing the traveling speed at a low speed without increasing the number of parts.

  The traveling cart according to the present invention can be used as a welding device or a cutting device equipped with a welding torch or a cutting torch.

A traveling carriage B torch 1 casing 2 wheel 3 operation panel 4 connector 5 selection switch 6 data dial 7 operation button 8 data display section 9, 10 fine speed switch 11 magnet 11a lever 11b handle 12, 13 push button switch 15 stand 16 torch holder 18 Guide roller 19 Support arm 25 Control device 25a Input unit 25b Output unit 26 Arithmetic processing unit 26a Measurement calculation unit 26b Data storage unit 26c Specified value storage unit 26d Comparison determination unit 27 Drive motor 28 Rotary encoder 29 Torch drive device 30 Transmission unit

Claims (2)

A traveling carriage having a torch for welding or cutting a steel plate and having a magnet that attracts the steel plate, and configured to be able to travel while attracting the steel plate by the magnet,
A drive motor for traveling the traveling carriage;
A slow switch provided corresponding to the direction in which the traveling carriage travels,
An operation button for generating a signal for causing the traveling carriage to travel at a preset welding speed or cutting speed;
When the power is turned on and no signal is generated from the operation button and the drive motor is in a non-rotating state and the fine speed switch is operated, the welding speed or cutting speed set in the corresponding direction is lower than the preset speed. A control unit that controls the drive motor to control the drive motor so that the traveling speed of the traveling carriage gradually increases to a preset speed in response to the continuation of the signal generated from the fine speed switch while controlling the driving motor to cause the traveling carriage to travel. When,
A traveling carriage characterized by comprising: The slow switch consists of push button switches provided at both ends in the traveling direction of the traveling carriage, and the push button of the push button switch protrudes from the end in the traveling direction of the traveling carriage,
When the power is turned on and no signal is generated from the operation button and the drive motor is in a non-rotating state, the control unit outputs a signal from a push button switch provided at either end of the traveling direction of the traveling carriage. When this occurs, the drive motor is controlled so that the traveling carriage travels at a speed lower than a preset welding speed or cutting speed, and provided at the end on the downstream side in the traveling direction when the traveling carriage is traveling. 2. The traveling cart according to claim 1, wherein when the signal is generated from the push button switch, the drive motor is controlled to stop the traveling cart.

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