JP2564665B2 - Downhill type welder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic profile welding machine, and particularly to a guide bar inclined with respect to a horizontal plane and a welding torch that is slidably mounted on the guide bar. The present invention relates to an automatic profile welding machine that includes a carriage and uses the sliding of the carriage with respect to a guide bar to make the welding torch follow the welding line.

[Conventional technology]

A welding rod holder is slidably attached to a guide bar inclined with respect to a horizontal plane, the tip of the welding rod is applied to the welding line, and welding is automatically performed along the welding line by sliding down by the gravity of the welding rod holder. An automatic copy welding method is already known (for example, Japanese Utility Model Publication No. 46-35221). In this welding method, the welding rod and the guide bar whose tip hits the welding material supports the welding rod holder, and the welding rod holder descends along the guide bar as the welding rod is consumed as the welding progresses. This welding method is characterized in that the welding rod holder does not need to be driven by a power source, the structure of the welding machine is very simple, and the work of the operator is simple.

On the other hand, a mechanism for driving the welding torch holder in a direction orthogonal to the welding line and a mechanism for driving a carriage equipped with the welding torch holder in a direction parallel to the welding line are at least two.
2. Description of the Related Art There is a so-called robot welder that is equipped with an axial drive system to allow a trolley to move by itself and a welding torch to follow the welding line (for example, Japanese Patent Publication No. 51-23389).

[Problems to be Solved by the Invention]

In the above-mentioned automatic copying using gravity downhill, the welding rod supports the component force of the gravity applied to the welding rod holder in the direction of the welding rod, so if the welding rod is thin or long and it is easy to bend, On the other hand, the amount of sliding down of the welding rod holder is large and the welding quality is liable to be disturbed, and the welding rod holder reaches the end of sliding down by the time the welding of the required part is finished. However, the deflection of the welding rod is small, but when welding is started, the welding rod self-heats (burns) due to the Joule heat generated by the welding current, and the welding rod sharply bends. Therefore, a welding rod that is too thin cannot be used, and this method cannot be applied to fillet welding of small leg length from this aspect. Also, the welding rod cannot be made too long (usually
Since it is within 55 cm), the number of rod joints increases and welding work efficiency decreases. A bead joint appears due to the rod joint, and the shape of the bead joint becomes large, so that grinder shaping is required, and the post-treatment work increases.

The above-described robot welder has a complicated mechanism and a large welder shape, which makes it difficult to carry and operate. In addition, the price of the welding machine is high. Furthermore, post-processing work is also necessary because welding residue is left at the start and end of welding.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic copy welding machine which can be manufactured at a relatively low cost, with a low bar splicing frequency, a relatively simple structure and easy handling.

[Means for solving the problem]

The slide-down profile welding machine according to the first aspect of the present invention (FIG. 1) is a guide bar (10); guide bar supporting means (12, 14) for supporting the guide bar (10) by inclining it with respect to a horizontal plane; A carriage (16) mounted on the guide bar (10) so as to be movable in the extending direction; and a carriage (16) extending in a direction intersecting with the guide bar (10) and mounted on the carriage (10) so as to be movable in that direction. The leg member (82); the copying roller (104) and the welding torch (100) mounted on the lower end of the leg member (82); and the moving speed of the leg member (82) in the contraction direction with respect to the carriage (16). A speed regulating means (110, 112);

The slide-down profile welding machine of the second aspect of the present invention (FIG. 5) is a guide bar (10); guide bar supporting means (12, 14) for supporting the guide bar (10) by inclining it with respect to a horizontal plane; A carriage (16) mounted on the guide bar (10) so as to be movable in the extending direction; and a carriage (16) extending in a direction intersecting with the guide bar (10) and mounted on the carriage (10) so as to be movable in that direction. A leg member (82); a copying roller (104) and a welding torch (100) mounted on the lower end portion of the leg member (82); and speed regulating means (110, 112) for determining the rotation speed of the copying roller (104). Prepare

The symbols in parentheses indicate the corresponding elements in the embodiments described later with reference to the drawings.

[Action]

In both the first and second aspects of the present invention, the guide bar (10) is inclined with respect to the horizontal plane, and the carriage (16) is movable in the extending direction of the guide bar (10). Furthermore, the leg member (82) is movable with respect to the carriage (16) in a direction intersecting the guide bar (10), and the copying roller (104) and the welding torch (100) are attached to the lower end portion of the leg member (82). ) Is attached, the sliding force due to the gravity of the carriage (16) is applied to the copying roller (10
4) give to. Therefore, the copying roller (104) can shorten the distance between the carriage (16) and the copying roller (104) (the leg member 82 can move in the contracting direction with respect to the carriage 10) and along the welding line. It can move along with you.

By the way, the first mode is provided with speed regulating means (110, 112) for determining the moving speed of the leg member (82) in the contraction direction with respect to the carriage (16), and thereby the distance between the carriage (16) and the copying roller (104). Since the speed at which the scanning roller becomes shorter is specified, the speed of the copying roller (10
4) and welding torch (100) move along the weld line. That is, the welding speed is determined by the speed regulating means (110, 112). Since the welding wire is fed to the welding torch, the possible welding length is defined not by the welding wire but by the length of the guide bar (10). Guide bar (10)
Since the length can be set to 2 m or more, the length of one welding can be significantly lengthened.

The second mode includes speed regulating means (110, 112) that determines the rotation speed of the copying roller (104), and if the copying roller (104) does not rotate, the carriage (16) and the copying roller (104).
Since the distance between
4) Rotation speed of carriage (16) and copy roller (10
4) The speed at which the distance between and becomes short is specified. The copying roller (104) and the welding torch (100) move along the welding line at a speed proportional to the rotation speed of the copying roller (104). That is, the welding speed is determined by the speed regulating means (110, 112).

As described above, according to the present invention, the guide bar (10), the carriage (16), and the leg member (82) force the copying roller (104) to follow the welding line, but the speed regulating means (110, 112). Is a leg member (82) or a copying roller (104)
Specifies the moving speed of. That is, speed regulation means (110,11
When the carriage (16) easily slides down, 2) restrains the carriage (16) from sliding down, and when the carriage (16) is difficult to slide down, the carriage (16) is encouraged to slide down, and the welding speed is increased. Regulate.

As a result, the welding wire or the welding rod does not have to support the carriage (16), and all kinds of problems related to the thickness and length of the conventional welding rod and burning of the rod are eliminated. Since the speed regulating means (110, 112) is, so to speak, a uniaxial drive mechanism, the addition of mechanical elements is small, the welder structure is relatively simple, and its transportation and use operations are relatively simple, and the price of the welder is low. Can also be relatively cheap.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[Embodiment 1] FIG. 1 shows an appearance of a first embodiment of the present invention. Support legs 12 and 14 are fixed to both ends of the guide bar 10, respectively, and the heights of the support legs 12 and 14 are different, so that the guide bar 10 is inclined with respect to a horizontal plane. This guide bar 10
The carriage 16 is coupled to the. A guide frame 18 is fixed to the carriage 16.

The guide frame 18 is shown in FIGS. 2a and 2b with it removed from the carriage 16. The guide frame 18 has four pins 20, 28,
The inner rings of the two bearings 22 and 24 are fixed to the pin 20, and the outer rings of the bearings 22 and 24 are in contact with the guide bar 10. An inner ring of one bearing 26 is fixed to the pin 28, and an outer ring of the bearing 26 faces the guide bar 10 and abuts on an intermediate portion of the bearings 22 and 24. Two bearings on pin 30 as well
32, 34 are mounted and one bearing 36 is mounted on the pin 38 with the bearings 32, 34 and 36 sandwiching the guide bar 10 between them. As shown in Figure 2b,
Since a pair of three bearings 22, 24, 26 support the guide bar 10 by supporting it at three points, and similarly, the bearings 22, 23, 26 support the guide bar 20 by supporting it at three points, On the other hand, the guide frame 18 does not substantially move in the radial direction of the guide bar 10 but can freely move in the direction along the central axis of the guide bar 10 and can rotate about the central axis.

Referring to FIG. 1, since the guide frame 18 is fixed to the carriage 16, the carriage 16 can freely move along the guide bar 10 and rotate about the guide bar 10.

A leg rod 82 is supported on the carriage 16 so as to be vertically movable. The inside of the carriage 16 is shown in FIG. carriage
Three-moving pins 40, 50 and 56 are fixed to the 16 pin. The pin 46 is rotatably mounted on the carriage 16 via a bearing. Roller 42 with flange on pin 40 via bearing
Is mounted, and the gear 44 is fixed to the roller 42 with the collar. A gear 48 is fixed to the pin 46, and the gear 48 meshes with the gear 44. A roller 52 with a collar is attached to the pin 50 via a bearing, and a gear 54 is fixed to the roller 52 with a collar and meshes with a gear 48. Since the gears 44 and 54 have the same number of teeth, the gears 44 and 54 rotate at the same speed.

The pin 56 penetrates the rotating arm 58,
Is rotatable about a pin 56. A pin 60 is fixed to the rotating arm 58, and a flanged roller 62 is attached to the pin 60 via a bearing. A pin 64 is rotatably set on the carriage 16 and a cam is attached to the pin 64.
Although 76 and 78 are fixed, a screw base 66 is freely rotatably attached to the pin 64 between the cams 76 and 78. pin
A release lever 80 (Fig. 1) is fixed to one end of 64. The lower end of the male screw 68 is fixed to the screw base 66. The male screw 68 passes through the U-shaped opening at the free end of the rotary arm 58 and penetrates the washer 70 and the compression coil spring 72, and the adjustment knob 74 abutting on the end face of the compression coil spring 72 is screwed onto the upper end thereof. are doing.

Collared rollers 42 and 52 with small diameter cylinder surface and collared rollers
The leg rod 82 is located between the small diameter body circumferential surfaces of 62. The small diameter body circumferential surface of the flanged rollers 42 and 52, that is, the surface on which the leg rod 82 contacts is a rubber coating layer so that the leg rod 82 does not slip, while the small diameter body peripheral surface of the collar roller 62 is a metal surface. .

By rotating the adjusting knob 74 clockwise to tighten it, the free end of the rotating arm 58 is pushed leftward in FIG. 3 via the compression coil spring 72, and the rotating arm 58 is rotated counterclockwise in FIG. As the roller 62 rotates in the direction, the collared roller 62 abuts the leg rod 82, and the leg rod 82 is abutted on the collared rollers 42, 52 so that the pushing leg bar 82 also abuts the collared rollers 42, 52. By continuing to tighten the adjusting knob 74, the compression coil spring 72 is compressed, the rubber coating of the small diameter cylinders of the rollers 42, 52 is compressed, and the pressure contact force (friction force) between the rollers 42, 52 and the leg bar 82 is reduced. ) Becomes higher. This pressure contact force is changed by turning the adjusting knob 74 clockwise or counterclockwise A1. With this adjusting knob 74, the leg bar 82 does not slide the pressure contact force against the rollers 42, 52, and when the motor 112 is energized, the rollers 42, 52 are forced by the leg bar 82.
Is adjusted without slipping and is adjusted to the extent that the motor load due to the pressure contact force does not become excessive.

The output shaft of the speed reducer 110 is connected to the pin 46, and the rotation shaft of the DC motor 112 is connected to the input shaft of the speed reducer 110. Therefore, when the DC motor 112 rotates forward, the pin 46 and the pin are fixed to the pin 46. The gear 48 rotates clockwise in FIG. 3,
As a result, the gears 44 and 54 rotate in the counterclockwise direction, the upward movement driving force acts on the leg rod 82 by the rollers 42 and 52 with flanges, and an appropriate pressure contact force is applied to the leg rod 82 by the adjusting knob 74. Then, the leg bar 82 is driven upward by the frictional force between the collared rollers 42, 52 and the leg bar 82. When the motor 112 stops, the speed reducer 110 and the motor 112 become a large load, and the speed reducer 110 acts as a brake or a stopper for stopping and restraining the gear 48. It cannot move downward.

When the lever 80 shown in FIG. 1 is turned clockwise or counterclockwise by about 90 degrees, the cams 76, 78 via the pin 64 are thereby rotated.
Also rotates to rotate the rotating arm 58 in the clockwise direction in FIG. 3 against the repulsive force of the compression coil spring 72, so that the flanged roller 62 separates from the leg rod 82 and the carriage 16
On the other hand, the leg rod 82 can freely move up and down.

As shown in FIG. 1, while the lever 80 is placed substantially parallel to the leg rod 82 and the motor 112 is not energized, the compression coil spring 72
The repulsive force of the collar 62 causes the leg roller 82 to move the leg rod 82
Since the speed reducer 110 and the motor 112 have stopped the rotation of the rollers 42, 52, the leg rod 82 cannot move in its longitudinal direction. Since the carriage 16 can descend along the guide bar 10, the carriage 16 tries to descend along the guide bar 10 due to its gravity, and accordingly the leg bar 82 moves upward relative to the carriage 16. However, the speed reducer 110 and the motor 112 have a large load to prevent this, and the leg bar 82 cannot move with respect to the carriage 16, that is, the leg bar 82 is fixed to the carriage 16, so the leg bar 82 is fixed. Functions as a support rod that prevents the carriage 16 from descending.

In this state, when the lever 80 is rotated about 90 degrees in the direction of arrow A2, the leg bar 82 becomes movable with respect to the carriage 16, so that the carriage 16 descends along the guide bar 10 and the leg bar 82
Since the lower part of the is supported by the horizontal member to be welded via the copying roller 104, the leg rod 82 moves upward (retracts) relative to the carriage 16. Manually move the carriage 16 to the guide bar 10
When it is driven upward along the direction, the leg bar 82 moves downward (extends) relative to the carriage 16 accordingly.

When the DC motor 112 is normally rotated with the lever 80 placed in the position shown in FIG. 1, the leg rod 82 moves upward relative to the carriage 16 (retracts) at a speed proportional to the rotation speed of the motor 112. ), The carriage 16 descends along the guide bar 10 at a speed proportional to the speed, and the copying roller 104 at the lower part of the foot bar 82 forms a gap between the horizontal member to be welded and the bracket 108 temporarily welded thereto. 1st along the welding line of the meat weld
In the figure, it moves while rotating from right to left.

The lower part of the leg rod 82 is shown in FIG. A U-shaped torch guide frame 84 and a wheel leg 102 are fixed to the lower end of the leg rod 82, and a copying roller 104 is rotatably attached to the wheel leg 102. Further, a shield plate 106 for preventing welding spatter from adhering to the copying roller 104 is fixed to the wheel leg 102. Two guide bars 88 and 90 are fixed to the torch guide frame 84, and one screw rod 92 is rotatably connected. The guide bars 88 and 90 respectively penetrate through two holes formed in a protrusion (not shown) of the torch support 86 that has entered the U-shaped guide frame 84,
The screw rod 92 is screwed into the female screw hole of the projecting piece. Screw rod 92
A knob 94 is fixedly attached to this. By rotating the knob 94 in the direction of arrow A3, the torch support tool 86 moves in the direction of arrow A4 with respect to the guide frame 84 (leg bar 82).

A torch holder 96 that supports the torch 100 is fixed to the torch support 86.

The heads of the screw rods 98 and 99 are engaged with one of the two opposing tightening plate portions of the torch support 86 so as not to rotate with respect to the 86, and the other holes are formed into these screw rods. 98 and 99 penetrate, and a wing nut (not shown) is screwed into each of the threaded parts.

The torch holder 96 is fixed to the torch support 86 by tightening these wing nuts. By loosening those wing nuts, the torch holder is attached to the torch support 86.
96 can be vertically adjusted in the direction of arrow A5.

FIG. 1 is referred to again. The operation panel 114 for the carriage 16
A power switch (not shown), a potentiometer 130 having an adjusting knob for designating a welding speed, a test start switch 132, a welding start switch 134 and a stop switch 116 are attached to the operation panel 114. .

Install the motor 112 inside the operation panel 114 with the potentiometer 13
A driver for the motor 112 that energizes the positive rotation at a speed designated by 0, a shield gas supply valve, a valve driver, a welding power source, a driver for the wire feed motor, and a stop switch 116 after the welding start switch 134 is turned on once.
To the valve driver and the motor driver (the above-mentioned two sets) until the opening is opened, the welding power source is turned on, the test start switch 132 is turned on once, and then the stop switch 116 is opened. Until then, the welding control circuit for instructing the motor energization is stored only in the driver for the motor 112.

The welding wire (solid wire or flux-cored wire) is supplied to the welding torch 100 from the wire spool 124 mounted on the suspension table 126 via the wire feeding device 122, and the shield gas inside the operation panel 114 is supplied. Shield gas (CO ₂ ) is supplied through the supply valve.

In FIG. 1, reference numeral 118 is an electric cord, and 120 is a tube for guiding a wire and a shielding gas.

The stop switch 116 is a normally-closed switch and opens from closed to open when its frontmost button is pressed. This switch 116 has a signal contact connected to the above-mentioned welding control circuit, which generates a signal indicating opening / closing, a welding power source, a motor 11
It has a driver for 2 and a driver for the wire feed motor and a power contact inserted in the power line to the valve driver, and when the leading edge button is pressed, the signal contact changes from closed to open and responds to this. Then, the welding control circuit instructs the valve driver and the motor driver (the above two sets) to close the valve and stop the motor energization, and disconnects the power line from the power source (118) regardless of the operation of the welding control circuit.

On the guide bar 10, a striker 127 having a flange against which the frontmost button of the stop switch 116 abuts when the carriage 16 descends is mounted slidably with respect to the guide bar 10 in the direction in which it extends.

The striker 127 can be slid with respect to the guide bar 10 by loosening a screw (not shown) screwed into the striker 127.

The striker 127 is fixed to the guide bar 10 by tightening the screw.

When the welding machine of the first embodiment described above is used, the supporting legs 12 and 14 are placed on the horizontal material to be welded as shown in FIG. Align the lever 80 with the flange
Carriage 16
Down and move the welding torch 100 to the welding end point. Then set the striker 127 to the stop switch 1
Position the 16 buttons to the position where they are pressed most deeply. When the position adjustment of the striker 127 is substantially omitted, the carriage 16 is slid down until the button of the stop switch 116 is pushed deepest, and the support legs 12 and 14 are moved with the button being pushed deepest to move the welding torch 100. Is positioned at the end of fillet welding. Next, the carriage 16 is pushed up along the guide bar 10 to move the welding torch 100 to the start point of the fillet welding. At this time, the copying roller 104 moves the horizontal member and the flange 108.
If it shifts from the corner between them, the support leg 14 is shifted to the flange 108 side. When the welding torch 100 is placed at the starting point of fillet welding, the lever 80 is returned and rotated so that it is substantially parallel to the leg rod 82 as shown in FIG. This fixes the leg rod 82 to the carriage 16,
The copying roller 104 does not move, and the welding torch 100 is at the starting point of fillet welding. In this state, when confirming the welding tracing locus, the welding end point, and / or the welding speed of the copying roller 104 in advance, the operator closes the test start switch 134 once. Then, the motor 112 turns the potentiometer 130.
Rotates forward at a speed designated by, the carriage 16 descends along the guide bar 10 at a speed proportional to this speed, and the copying roller 104 moves along the corners of the horizontal member and the flange 108.
When the stop switch 116 hits the striker 127, the motor 112 stops there. Then, the operator turns the lever 80 to 90.
Rotate about a degree to release the leg rod 82 from the carriage 16, push up the carriage 16 to the welding start position, and then the lever.
Return 80 to the position shown in FIG. By the above operation, the operator can confirm the positioning of the welding machine and the automatic copying operation.

When the operator sets the welding machine to the welding start position as described above and once closes the welding start switch 132, welding is started and the copying roller 104 is moved along the corner between the horizontal member to be welded and the flange 108. , Moves at a speed set by the potentiometer 130 to perform fillet welding. Welding torch 10
When 0 reaches the welding end point, the stop switch 116 hits the striker 127 and the welding is stopped.

[Embodiment 2] FIG. 5 shows an appearance of a second embodiment of the present invention. In this embodiment, the speed reducer 110 and the motor 112 are separated from the carriage 16 and mounted on the torch guide frame 84. The output shaft of the speed reducer 110 is coupled to the roller shaft to which the copying roller 104 is fixed, and the input shaft of the speed reducer 110 is coupled to the rotating shaft of the motor 112. Also, the carriage 16
To secure the leg rod 82 to the cams 76, 78 are covered with a relatively hard rubber, and the lever 80 is moved from the position shown in FIG.
It is a brake shoe that presses against the leg rod 82 when it is rotated about 90 degrees in the A2 direction. The other structure is similar to that of the first embodiment.

In this second embodiment, since the copying roller 104 cannot freely rotate, when the supporting legs 12 and 14 are moved to position the welding torch 100 at the end point or the start point of the fillet welding as a preparation for welding, Is to lift the guide frame 84, move the copying roller 104 away from the horizontal member to be welded and the flange 108, and slide the carriage 16 downward or upward along the guide bar 10 to place the torch 100 at the welding end point or start point. Then, lower the guide frame 84. That is, when the carriage is moved before or after welding, the guide frame 84 is lifted.

The speed reducer 110 is equipped with a manual clutch or an electric clutch, and the copying roller can be operated by lever operation or switch operation.
The 104 may be idle. In this case, when moving the carriage before or after welding, it is sufficient to move only the carriage 16 by turning the lever 80 to the brake release position (the position shown in FIG. 5) and disengaging the clutch.

Position the welding torch 100 at the welding start point and move the lever 80
In the state in which is placed in the brake release position (position shown in FIG. 5), the copying roller 104 is stopped and restrained by the speed reducer 110, so that the guide frame 84 does not move, whereby the carriage 16 is stationary. . Worker test start switch
When the welding start switch 132 or the welding start switch 134 is once closed, the motor 112 is biased in the normal rotation direction so that the copying roller 104 rotates counterclockwise at the speed set by the potentiometer 130 in FIG. Move towards. Since the carriage 16 descends along the guide bar 10 in conjunction with this movement, when the carriage 16 descends along the guide bar 10 at a speed proportional to the rotation speed of the motor 112, and the stop switch 116 hits the striker 127. The energization of the motor 112 is stopped, the movement of the copying roller 104 is stopped there, and the carriage 16 is stopped.

Although both the first and second embodiments have been described with respect to the case where fillet welding is performed, a guide rail is placed along a substantially horizontal welding line, and the copying roller 104 is used.
When the slab is placed or the profiling roller 104 is coupled to the profiling groove, similar automatic profiling welding can be realized without using fillet welding. Further, although the guide bar 10 is supported by the support bases 12 and 14 in a lower supporting manner, the guide bar 10 may be suspended and supported.

〔The invention's effect〕

In any case, according to the present invention, the guide bar (10),
The scanning roller (104) is forced by the carriage (16) and the leg member (82) to follow the welding line, but the speed regulating means (110, 112) is used by the leg member (82) or the copying roller (10).
4) Specify the moving speed. That is, the speed regulating means (11
0,112) suppresses the carriage (16) from sliding down when the carriage (16) is likely to slide down, and encourages the carriage (16) to slide down when the carriage (16) is difficult to slide down. Regulate.

As a result, the welding wire or the welding rod does not have to support the carriage (16), and all kinds of problems related to the thickness and length of the conventional welding rod and burning of the rod are eliminated. Since the speed regulating means (110, 112) is, so to speak, a uniaxial drive mechanism, the addition of mechanical elements is small, the welder structure is relatively simple, and its transportation and use operations are relatively simple, and the price of the welder is low. Can also be relatively cheap.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of the first embodiment of the present invention. 2a is an enlarged perspective view showing the relationship between the guide frame 18 and the guide bar 10 fixed to the carriage 16 shown in FIG. 1, and FIG. 2b is an enlarged side view. FIG. 3 is an enlarged perspective view showing the internal structure of the carriage 16 shown in FIG. FIG. 4 is an enlarged perspective view of the guide frame 84, the copying roller 104, etc. shown in FIG. FIG. 5 is a perspective view showing the outer appearance of the second embodiment of the present invention. 10: Guide bar (guide bar) 12, 14: Support leg (guide bar support means) 16: Carriage (carriage), 18: Guide frame 20: Pin, 24, 26: Bearing 28: Pin, 30: Pin 32, 34 : Bearing, 36: Bearing 38: Pin, 40: Pin 42: Roller with collar, 44: Gear 46: Pin, 48: Gear 50: Pin, 52: Roller with collar 54: Gear, 56: Pin 58: Rotating arm , 60: Pin 62: Roller with flange, 64: Pin 66: Screw seat, 68: Screw rod 70: Washer, 72: Compression coil spring 74: Adjustment knob, 76, 78: Cam 80: Release lever, 82: Leg bar (Leg member) 84: Guide frame, 86: Torch support tool 88,90: Pin, 92: Screw rod 94: Knob, 96: Torch holder 98,99: Screw rod, 100: Welding torch (Welding torch) 102: Wheel leg , 104: Copying roller (copying roller) 106: Shielding plate, 108: Flange to be welded 110: Reducer, 112: Motor (110,112: Speed regulating means) 114: Control panel, 116: Stop switch 118: Electric cord , 120: Tube 122: Wire feeder, 124: Wire spool 126: Suspension stand, 127: Striker 130: Potentiometer, 132: Test start switch 134: Welding start switch

Claims (2)

(57) [Claims] 1. A guide bar; a guide bar supporting means for supporting the guide bar by inclining it with respect to a horizontal plane; a carriage mounted on the guide bar so as to be movable in the extending direction; and intersecting with the guide bar. A leg member extending in a direction and movably attached to the carriage in the direction; a copying roller and a welding torch attached to a lower end portion of the leg member; and a moving speed of the leg member with respect to the carriage in a contracting direction. A down-slide profile welding machine having a speed regulating means for determining. 2. A guide bar; a guide bar supporting means for supporting the guide bar by inclining it with respect to a horizontal plane; a carriage mounted on the guide bar so as to be movable in a direction in which the guide bar extends; and intersecting with the guide bar. A leg member that extends in a direction and is movably attached to the carriage in the direction; a copying roller and a welding torch that are attached to a lower end portion of the leg member; and a speed defining unit that determines a rotation speed of the copying roller. Downhill copying type welding machine equipped with.