JP7208461B2 - Welding trolley - Google Patents

Description

TECHNICAL FIELD The present invention relates to a welding carriage that carries a welding torch and travels along a welding line.

Conventionally, there is one described in Patent Document 1, for example, as a welding carriage as described above.
This welding trolley is a welding trolley used for butt welding. A driving force transmission mechanism that transmits the supplied driving force to the four running wheels, a torch support that supports the welding torch on one side of the truck body with the tip facing downward, and a truck body It has a steering mechanism located in front of the and a copying roller.

In this case, the copying roller is provided on one side of the carriage body on which the welding torch is located and extends forward in the traveling direction from the welding torch, and is provided between the materials to be butt-welded by the welding torch. It is positioned for insertion into a V-groove.

When welding materials to be welded against each other using this welding carriage, the profiling roller is inserted into the V-shaped groove between the materials to be welded, and the carriage body is placed on one of the materials to be welded. Welding with a welding torch is started, and driving force is supplied from a motor with a speed reducer to the traveling wheels through a driving force transmission mechanism to cause the carriage body to travel along the V-shaped groove. The steering mechanism is operated accordingly.

In this welding trolley, when the trolley body advances to a predetermined welding end position during butt welding, the motor with the speed reducer is stopped to stop the trolley body. Then, after carrying the carriage body to the welding start position and setting it again, welding with the welding torch is started again, and the carriage body is moved along the V-shaped groove.

JP-A-2005-138176

However, in the above-described conventional welding carriage, the direction of movement during butt welding is determined (because there is directionality), so if multiple passes are required to finish butt welding, the carriage body There is a problem that work efficiency is poor because the work of transporting from a predetermined welding end position to the welding start position and resetting must be performed for the number of passes.

In addition, in the conventional welding truck described above, since the steering mechanism, which is operated as required during butt welding, is mounted on the truck body together with the driving force transmission mechanism, the structure of the truck body becomes complicated and the weight increases. However, there is a problem that it will be damaged, and solving these problems has been a conventional problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems described above, and it is an object of the present invention to provide a welding trolley capable of improving work efficiency while simplifying the structure and reducing the weight. there is

A first aspect of the present invention is a welding trolley used for fillet welding, comprising a trolley body on which a welding torch is mounted, a plurality of traveling wheels arranged on both left and right sides of the trolley body, and the trolley body. a one-side drive source mounted on the carriage body for forward and reverse rotation of the plurality of traveling wheels positioned on one side of the carriage body; It controls the magnitude and rotation direction of the driving force from the other side drive source that rotates the traveling wheels in forward and reverse directions, and the one side drive source that supplies the plurality of traveling wheels positioned on one side of the bogie body. A control unit for controlling the magnitude and rotation direction of the driving force from the other-side drive source supplied to the plurality of traveling wheels located on the other side of the carriage body, and a subject to be fillet-welded by the welding torch It is configured to have a tracing mechanism that causes the carriage body to travel following the welding line between the welding materials.

In a second aspect of the present invention, the one-side drive source and the other-side drive source are mounted on the bogie body one by one, and all of the plurality of traveling wheels positioned on one side of the bogie body are a one-side drive force transmission mechanism for transmitting the drive force from the one-side drive source; The configuration is such that the other side driving force transmission mechanism for transmitting the driving force is provided.

In a third aspect of the present invention, one of the plurality of traveling wheels positioned on one side of the bogie main body and the plurality of traveling wheels positioned on the other side of the bogie main body are arranged on one side facing each other. Each axle of the traveling wheel and the traveling wheel on the other side is supported by the bogie body via an equalizer.

In the welding carriage according to the present invention, when welding materials to be welded together by butt welding, for example, a profiling roller provided on the carriage body is inserted into the V-shaped groove between the materials to be welded to set on top. When welding with a welding torch is started in this state, driving forces of the same magnitude and in the same rotational direction are applied to the traveling wheels arranged on the left and right sides of the bogie body from the drive sources on both the left and right sides according to commands from the control unit. When supplied, the bogie body begins to run along the V-groove.

When the truck body reaches a predetermined welding end position during butt welding, the supply of driving force to the left and right running wheels from both the left and right driving sources is cut off by a command from the control unit, and the truck body stops. do.

After that, according to a command from the control unit, a driving force of the same size and in a direction of rotation opposite to that before is supplied from the driving sources on both the left and right sides to a plurality of traveling wheels located on each of the left and right sides of the bogie body. Then, the truck body starts traveling in the opposite direction along the V-shaped groove.

In other words, the welding carriage according to the present invention can freely move forward and backward according to commands from the control unit (because there is no directionality). There is no need to move the main body from the predetermined welding end position to the welding start position and set it again, thereby improving working efficiency.

In addition, in the welding trolley according to the present invention, when the V-shaped groove is curved, the driving forces supplied from the driving sources on both the left and right sides to the left and right traveling wheels are made to have different magnitudes. Since steering can be performed by varying the number of rotations of the running wheels, the structure of the truck body can be simplified and the weight of the truck body can be reduced by the amount that the steering mechanism does not need to be mounted on the truck body together with the driving force transmission mechanism. It will happen.

In this case, one side drive source and one other side drive source are mounted on the bogie body, and the driving force from the one side drive source is applied to all of the plurality of traveling wheels located on one side of the bogie body. A one-side driving force transmission mechanism for transmitting the driving force, and a second-side driving force transmission mechanism for transmitting the driving force from the other side driving source to all of the plurality of traveling wheels located on the other side of the bogie body are mounted on the bogie body. If it is mounted, the structure of the truck body becomes simpler and the weight is further reduced.

Furthermore, in the welding truck according to the present invention, when there is a step or undulation that can be overcome on the traveling road, the upper and lower sides of each axle of the traveling wheel on one side and the traveling wheel on the other side supported by the truck body Since the direction deviation is absorbed by the equalizer, it is possible to avoid hindrance to the welding carriage.

The welding trolley according to the present invention has a very excellent effect that it is possible to improve work efficiency while achieving simplification of structure and reduction of weight.

FIG. 5 is a cross-sectional explanatory view from the side surface direction during butt welding of the welding carriage according to the embodiment of the present invention; FIG. 2 is a front explanatory view of the welding carriage shown in FIG. 1; FIG. 2 is an explanatory plan view omitting components above the traveling wheels of the welding carriage in FIG. 1 ; FIG. 10 is a front explanatory view of a welding carriage according to another embodiment of the present invention when it is in fillet contact; FIG. 5 is an explanatory plan view omitting components above the traveling wheels of the welding carriage in FIG. 4 ;

The present invention will be described below with reference to the drawings.
1 to 3 show a welding carriage according to one embodiment of the present invention, and in this embodiment, an example in which the welding carriage according to the present invention is used for butt welding will be described. In FIGS. 1 and 3, the movement in the direction of the arrow is forward movement, and the movement in the direction opposite to the arrow movement is backward movement.

As shown in FIGS. 1 to 3, this welding trolley 1 includes a trolley body 2 in which traveling wheels 4 are arranged at four locations on the front, rear, left, and right, a drive unit 10, and a control unit 6 for controlling the operation of the trolley body 2. , and a torch support mechanism 30 arranged between the front and rear ends of the carriage body 2 . A driving force transmission mechanism 20 is provided.

In this case, two sets of drive units, a left drive unit 10L and a right drive unit 10R, are mounted on the truck body 2, and the motor 11 with a reduction gear of the left drive unit 10L is mounted on the front part of the truck body 2. , drive two traveling wheels 4, 4 positioned on the left side (one side) of the truck body 2. drive two running wheels 4, 4 located on the right side (the other side) of the .

The driving force transmission mechanism 20 of the left drive unit 10L includes an output gear 21 attached to the output shaft 11a of the motor 11 with a reduction gear, an input gear 22 attached to the front wheel axle 4f of the front left running wheel 4FL, and an output gear. A chain 23 stretched between the gear 21 and the input gear 22, a transmission gear 24 mounted on the front wheel axle 4f in parallel with the input gear 22, an input gear 25 mounted on the rear wheel axle 4r of the rear left running wheel 4RL, A chain 26 is provided between the transmission gear 24 and the input gear 25 .

The driving force transmission mechanism 20 of the right drive unit 10R includes an output gear 21 attached to the output shaft 11a of the motor 11 with a reduction gear, an input gear 22 attached to the rear wheel axle 4r of the rear right running wheel 4RR, and an output gear. A chain 23 stretched between the gear 21 and the input gear 22, a transmission gear 24 mounted on the rear wheel axle 4r in parallel with the input gear 22, and an input gear 25 mounted on the front wheel axle 4f of the running wheel 4FR on the front right side. , a transmission gear 24 and an input gear 25.

In this embodiment, an equalizer 12 connects the left and right front wheel axles 4f, 4f and the left and right rear wheel axles 4r, 4r.

The control unit 6 controls the driving force from the motor 11 with a reduction gear of the left driving unit 10L to be supplied to the front left running wheel 4FL and the rear left running wheel 4RL of the bogie body 2 via the driving force transmission mechanism 20. The power from the motor 11 with a reduction gear of the right drive unit 10R that controls the speed and rotation direction and supplies the driving force to the front right running wheel 4FR and the rear right running wheel 4RR of the bogie body 2 via the driving force transmission mechanism 20 It controls the magnitude of the driving force and the direction of rotation.

The torch support mechanism 30 includes a rail 31 arranged on the carriage body 2 along a direction perpendicular to the traveling direction of the carriage body 2 (horizontal direction in FIG. 2), and a slide base 32 capable of reciprocating on the rail 31. , and a weaving unit 33 arranged on the slide base 32 .

The weaving unit 33 includes a weaving motor 34 fixed to the slide base 32 , a slider 35 , and a driving force of the weaving motor 34 fixed to the slide base 32 to reciprocate the slider 35 in a direction perpendicular to the running direction of the carriage body 2 . A moving weaving device 36 and a torch clamp which is connected to a slider 35 and supports the welding torch T with the tip Ta of the welding torch T directed downward on one side surface of the carriage body 2 (left side in FIG. 2). 37.

The position of the slide base 32 can be adjusted in a direction perpendicular to the running direction of the carriage body 2 by rotating a horizontal knob 38, and the welding torch T supported by the torch clamp 37 is positioned relative to the V-shaped bevel Wa. Centering can be performed.

In addition, the weaving unit 33 can be vertically adjusted by rotating the height knob 39, and the distance between the welding torch T supported by the torch clamp 37 and the V-shaped bevel Wa can be adjusted. It's like

The welding carriage 1 is arranged at the front and rear ends of the carriage body 2, and two sets of the carriage body 2 travel along the V-shaped groove Wa between the materials W to be welded butt-welded by the welding torch T. and limit switches 8 arranged at the front and rear ends of the carriage body 2 .

A tracing mechanism 40 for causing the carriage body 2 to travel following the V-shaped groove Wa between the materials W to be welded includes a holder 41 extending from one side surface of the carriage body 2 where the welding torch T is positioned, A copying roller 42 supported by the holder 41 and inserted into the V-shaped groove Wa between the materials to be welded W, W, and a groove center detector 43 interposed between the tip of the holder 41 and the copying roller 42 are provided. are doing.

In this case, the copying roller 42 is formed by combining two umbrella-shaped pieces 42a, 42a to form an abacus bead shape as a whole. Even a slight step of the V-shaped bevel Wa can be transmitted to the bevel center detector 43 .

In this welding carriage 1, when welding materials W, W to be welded together by butt welding, the copying rollers 42, 42 of the copying mechanisms 40, 40 mounted on the carriage body 2 are placed between the materials W, W to be welded. The carriage body 2 is set on one of the workpieces W to be welded while being inserted into the V-shaped groove Wa.

After that, by rotating the horizontal knob 38, the position of the slide base 32 in the direction perpendicular to the running direction of the carriage body 2 is adjusted, and the welding torch T supported by the torch clamp 37 is adjusted to the V-shaped groove Wa. Along with centering, the vertical position of the weaving unit 33 is adjusted by rotating the height knob 39, and the distance of the welding torch T supported by the torch clamp 37 to the V-shaped bevel Wa is adjusted. conduct.

Next, when welding by the welding torch T is started while operating the weaving motor 34 of the weaving unit 33 in this state, the motors 11 with reduction gears of the left drive unit 10L and the right drive unit 10R are driven by commands from the control unit 6. The running wheels 4FL, 4RL located on the left side of the carriage body 2 and the running wheels 4FR, 4RR located on the right side of the carriage body 2 are supplied with driving forces of the same magnitude and in the same rotational direction, respectively. The carriage body 2 starts to travel (advance) along the V-shaped groove Wa into which the copying rollers 42, 42 are inserted.

When the carriage body 2 reaches a predetermined welding end position during butt welding (when the limit switch 8 detects the predetermined welding end position), a command from the control unit 6 causes the left and right drive units 10L and 10R to The supply of driving force from the motor 11 with a speed reducer to the running wheels 4FL, 4RL and the running wheels 4FR, 4RR is cut off, and the carriage body 2 stops.

Thereafter, according to a command from the control unit 6, the motors 11 with reduction gears of the left drive unit 10L and the right drive unit 10R drive the left running wheels 4FL and 4RL of the truck body 2 and the right running wheels 4FR and 4FR of the truck body 2, respectively. 4RR is supplied with a driving force of the same magnitude and in the reverse rotational direction, and the carriage body 2 starts traveling in the opposite direction along the V-shaped groove Wa (retreat). ).

In other words, in the welding carriage 1 according to this embodiment, the motors 11 with reduction gears of the left drive unit 10L and the right drive unit 10R are actuated according to commands from the control unit 6, so that they can move forward and backward freely (because there is no directionality). ), even if a plurality of passes are required to finish the butt welding, the work of transporting the carriage body 2 from the predetermined welding end position to the welding start position and setting it again is not necessary. Efficiency will be improved.

In addition, in the welding truck 1 according to this embodiment, when the V-shaped groove Wa is curved, the motor 11 with the speed reducer of the left drive unit 10L moves toward the left running wheels 4FL and 4RL of the truck body 2. and the drive force supplied from the motor 11 with a speed reducer of the right drive unit 10R to the right running wheels 4FR and 4RR of the bogie body 2, Steering can be performed by differentiating the rotational speeds of the left running wheels 4FL, 4RL and the right running wheels 4FR, 4RR, so that the steering mechanism does not need to be mounted on the bogie body 2 together with the driving force transmission mechanism 20. , the structure of the truck body 2 is simplified and the weight is reduced.

Furthermore, in the welding trolley 1 according to this embodiment, when there are bumps or undulations that can be overcome on the travel path, the left and right front wheel axles 4f, 4f and the rear wheel axles 4r, 4r of the trolley body 2 are connected. Since the equalizer 12 absorbs vertical deviation between the front wheel axles 4f and 4f and between the rear wheel axles 4r and 4r, the welding carriage 1 can be prevented from being hindered.

FIGS. 4 and 5 show a welding carriage according to another embodiment of the present invention. In this embodiment, an example in which the welding carriage according to the present invention is used for fillet welding will be described. do.

As shown in FIGS. 4 and 5, a welding carriage 51 according to this embodiment includes a slider 35A that reciprocates in a direction perpendicular to the traveling direction of the carriage body 2 and a It has a weaving unit 33A equipped with a torch clamp 37A that is connected to support the welding torch T with one side surface (the left side in FIG. 4) of the carriage body 2, and the welding torch T has its tip Ta to be welded. It is obliquely supported by a torch clamp 37A while facing the welding line L between the materials W and W.

In addition, in the welding carriage 51 according to this embodiment, the following mechanism 40A for causing the carriage body 2 to travel following the welding line L between the materials W to be welded is arranged behind the carriage body 2 in the traveling direction of the welding torch T. A holder 41A extending from one side surface, and a horizontal copying roller that is supported by the holder 41A side by side in the traveling direction of the carriage body 2 and slides in contact with the welding material W in the vertical direction among the welding materials W, W. 42A, 42A, and a gap detection sensor 43A interposed between the tip of the holder 41A and the horizontal copying rollers 42A, 42A.

The configuration of the welding carriage 51 according to this embodiment, other than the weaving unit 33A and the copying mechanism 40A, is the same as that of the welding carriage 1 according to the previous embodiment, so the description thereof will be omitted.

In the welding carriage 51 having such a configuration, when performing fillet welding at an internal corner between the materials to be welded W, W, the horizontal copying rollers 42A, 42A of the copying mechanism 40A mounted on the carriage body 2 are placed on the material W to be welded. , W in the vertical direction, the welding carriage 2 is set on the material W to be welded in the horizontal direction.

After that, by rotating the horizontal knob 38, the position of the slide base 32 in the direction perpendicular to the running direction of the carriage body 2 is adjusted, and by rotating the height knob 39, the weaving unit 33A is moved up and down. The position of the welding torch T supported by the torch clamp 37A is adjusted, and the distance from the welding line L between the workpieces W, W is adjusted.

Next, when welding by the welding torch T is started while operating the weaving motor 34 of the weaving unit 33A in this state, the motors 11 with reduction gears of the left drive unit 10L and the right drive unit 10R are driven by commands from the control unit 6. The traveling wheels 4FL and 4RL located on the left side of the carriage body 2 and the traveling wheels 4FR and 4RR located on the right side of the carriage body 2 are supplied with driving forces of the same magnitude and in the same rotational direction, respectively, so that the tracing mechanism 40A performs horizontal tracing. The carriage body 2 starts traveling (advances) along the vertical welding material W (welding line L) with which the rollers 42A, 42A are brought into contact.

When the carriage body 2 reaches a predetermined welding end position during fillet welding (when the limit switch 8 detects the predetermined welding end position), a command from the control unit 6 causes the left and right drive units 10L and 10R to The supply of the drive force from the motors 11 with reduction gears to the running wheels 4FL, 4RL and the running wheels 4FR, 4RR is cut off, and the carriage body 2 stops.

Thereafter, according to a command from the control unit 6, the motors 11 with reduction gears of the left drive unit 10L and the right drive unit 10R drive the left running wheels 4FL and 4RL of the truck body 2 and the right running wheels 4FR and 4FR of the truck body 2, respectively. Driving forces of the same magnitude and opposite rotational directions are supplied to 4RR, respectively, and the carriage body 2 starts running in the opposite direction along the welding line L (retreats).

That is, in the welding carriage 51 according to this embodiment as well, the motors 11 with reduction gears of the left drive unit 10L and the right drive unit 10R are actuated according to commands from the control unit 6, so that they can move forward and backward freely (no directivity). Therefore, even if a plurality of passes are required to finish the fillet welding, the work of transporting the carriage body 2 from the predetermined welding end position to the welding start position and resetting it is unnecessary. , work efficiency will be improved.

Also in the welding carriage 51 according to this embodiment, when the material W to be welded in the vertical direction is curved (the welding line L is curved), the motor 11 with the reduction gear of the left drive unit 10L The magnitude of the driving force supplied to the left running wheels 4FL and 4RL of the truck body 2, and the drive supplied from the motor 11 with a speed reducer of the right driving unit 10R to the right running wheels 4FR and 4RR of the truck body 2 The left running wheels 4FL, 4RL and the right running wheels 4FR, 4RR can be steered by making a difference between the magnitude of the force and the rotation speeds of the left running wheels 4FL, 4RL and the right running wheels 4FR, 4RR. The structure of the truck body 2 is simplified and the weight is reduced by the amount that it is not necessary to be mounted on the truck body 2 together with 20. - 特許庁

In any of the above-described embodiments, the motor 11 with a reduction gear on the left side and the motor 11 with a reduction gear on the right side are mounted on the truck main body 2, and the traveling wheels 4FL and 4FL located on the left side of the truck main body 2, A left driving force transmission mechanism 20 for transmitting the driving force from the motor 11 with a reduction gear on the left side to both 4RL, and a right driving force transmission mechanism 20 for both the running wheels 4FR and 4RR located on the right side of the bogie body 2. Although the right driving force transmission mechanism 20 for transmitting the driving force from the motor 11 with a speed reducer is mounted on the carriage body 2, it is not limited to this.

As another configuration, for example, wheel-in motors (one-side drive sources) are arranged on both the running wheels 4FL and 4RL located on the left side of the bogie body 2, and the running wheels 4FR and 4RR located on the right side of the bogie body 2 are arranged. A wheel-in motor (the other side drive source) is arranged on both sides of the truck body 2, and the magnitude and rotation direction of the driving force of the wheel-in motor incorporated in the traveling wheels 4FL and 4RL located on the left side of the bogie body 2 are controlled by the control unit 6. In addition to control, the magnitude and rotation direction of the driving force of the wheel-in motors incorporated in the traveling wheels 4FR and 4RR located on the right side of the bogie body 2 may be controlled.

The configuration of the welding carriage according to the present invention is not limited to the configuration of the embodiment described above.

1 welding truck 2 truck body 4FL, 4RL traveling wheels 4FR, 4RR positioned on the left side of the welding truck traveling wheels 4f positioned on the right side of the welding truck front wheel axle 4r rear wheel axle 6 control unit 11 motor with reduction gear (one side drive source and other side drive source)
12 equalizer 20 driving force transmission mechanism (one side driving force transmission mechanism and the other side driving force transmission mechanism)
T Welding torch

Claims (3)

A welding carriage used for fillet welding,
a truck body on which a welding torch is mounted;
a plurality of traveling wheels arranged on each of the left and right sides of the bogie body;
a one-side drive source that is mounted on the bogie body and rotates the plurality of traveling wheels positioned on one side of the bogie body in forward and reverse directions;
a second-side drive source mounted on the bogie body for rotating the plurality of traveling wheels positioned on the other side of the bogie body in forward and reverse directions;
It controls the magnitude and rotation direction of the driving force from the one-side drive source supplied to the plurality of traveling wheels positioned on one side of the bogie body, and controls the plurality of wheels positioned on the other side of the bogie body. a control unit that controls the magnitude and direction of rotation of the drive force from the other drive source supplied to the running wheels;
A welding trolley provided with a tracing mechanism for causing a trolley body to travel along a welding line between materials to be welded fillet -welded by the welding torch. The one-side drive source and the other-side drive source are mounted on the bogie body one by one, and all of the plurality of traveling wheels positioned on one side of the bogie body are driven from the one-side drive source. a one-side driving force transmission mechanism for transmitting the driving force, and the other-side driving force for transmitting the driving force from the other-side driving source to all of the plurality of traveling wheels positioned on the other side of the bogie body. The welding carriage according to claim 1, further comprising a transmission mechanism. Among the plurality of traveling wheels positioned on one side of the bogie body and the plurality of traveling wheels positioned on the other side of the bogie body, the traveling wheel on the one side and the traveling wheel on the other side facing each other 3. The welding trolley according to claim 1 or 2 , wherein each axle of the trolley is supported by the trolley body via an equalizer.

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