JP2576543Y2 - Welding wire feeder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention corrects the bending of a welding wire wound on a so-called wire reel and welds a welding wire held between a pressure roller and a feeding roller by a spring force. The present invention relates to a welding wire feeding device for feeding a welding part. More specifically, the present invention relates to an improvement in a welding wire feeding device capable of safely, quickly and easily replacing a welding wire wound on a wire reel.

[0002]

2. Description of the Related Art For example, a welding wire feeding device as shown in FIG. 10 has been proposed. That is, in FIG. 10, reference numeral 1 denotes a driving motor, 2 denotes a mounting base supporting the motor 1, 3 denotes a frame supported by the mounting base 2, and 51 denotes a swing that rotates about the frame 3 with a pin 52 as a fulcrum. The arm 14 is a pressure roller rotatably supported by the swing arm 51, 27 and 27 are moving-side correction rollers rotatably supported by the swing arm 51, and 13 is rotatably supported by the pin 8 as a fulcrum. Been the swing arm 51
Spring biasing means for pressing the free end of the motor 1;
, A feeding roller connected to the output shaft, a correction roller 28 on the fixed side, and 311, 313 a welding wire guide base.

[0003] In the above conventional welding wire feeding device,
When the welding wire is replaced, that is, when the welding wire is inserted, the spring force urging means 13 around the pin 8 is used.
Is rotated counterclockwise, the swing arm 51 is rotated clockwise about the pin 52, and the pressure roller 14 and the correction rollers 27, 27 are retracted from the path of the welding wire.

[0004]

When the welding wire is inserted, the spring force urging means 13 and the swing arm 51 are rotatable about the pins 8 and 52, respectively, so that the operator is erroneous. In other words, the finger may be pinched between the swing arm 51 and another member, or may be accidentally touched by the swing arm 51, for example.
Is rotated in the counterclockwise direction, the worker who works while visually observing the insertion state immediately reacts to the unexpected rotation of the swing arm 51, and causes a part of the body to contact another device. There was a possibility of inducing a so-called secondary disaster.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a welding wire feeding device capable of safely, quickly, and easily replacing a welding wire. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention corrects a welding wire by a fixing roller on a fixed side and a moving side, and pivots a pressing lever for supporting a pressing roller on a frame. The present invention is applied to a welding wire feeding device for feeding a welding wire while urging a pressure roller toward a feeding roller via a pressure lever by a spring force urging means. It is characterized in that a first link pivotally supported on the frame by a support shaft parallel to the pivot shaft of the pressure lever, and one end of the first link and the pressure lever are provided on the pressure lever. An engaging means for tilting independently in a direction opposing the urging force of the urging means, and for tilting while engaging the first link and the pressure lever with respect to the urging direction of the urging means; A first link driving means disposed at the other end of the first link for tilting the first link and the pressure lever via the engagement means in a direction against the urging force of the urging means; The moving-side correction roller supported on the other end of one link is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. First, a first embodiment according to the present invention will be described. In FIGS. 1 to 4, reference numeral 1 denotes a rotary drive, 2 denotes a mounting base for supporting the rotary drive 1, and 3 denotes a mount via an electric insulating plate 4. The frame 5 supported on the table 2 and the pressure roller 1
The pressing lever 5 is pivotally supported by the frame 3 via a first support shaft 6. Reference numeral 7 denotes a pressing screw shaft pivotally supported by the frame 3 via a pin 8, reference numeral 9 denotes a handle screwed to the screw shaft 7, reference numeral 11 denotes a spring member disposed between a spring receiver 12 and the handle 9. 7 to 1
2 constitutes a spring force urging means 13. Reference numeral 15 denotes a feeding roller, and the feeding roller 15 is connected to the rotary drive 1 via an appropriate speed reducer.

Reference numeral 16 denotes a first link rotatably supported on a second support shaft 21 as a fulcrum. An opening groove 17 opening upward, for example, is provided at the tip of the first link 16. ing. Reference numeral 18 denotes, for example, an engagement pin protruding at a desired position on the side of the pressure lever 5, and an engagement means 19 is formed by the engagement pin 18 and the opening groove 17. 22 is the first
A second link supported on the other end of the link 16 is rotatably supported via a pin 23, for example. 24
Is a third link rotatably supported by the frame 3 via a pin 25. The third link 24 and the second link 22 are rotatably connected to each other by a pin 26. The correction roller 27 is rotatably supported.

Reference numeral 28 denotes a fixed correction roller rotatably supported by the protruding portion 301 of the frame 3, and reference numeral 29 denotes a first correction roller.
A so-called pull-type link drive unit, for example, an electromagnetic solenoid, in which the plunger 291 is retracted by electromagnetic force when energized and the plunger 291 becomes free when electricity is cut off. In FIG. 1, when the electromagnetic solenoid 29 is energized, that is, when the plunger 291 is operated to retract, the first link 16
The free end of the first link 16 and the plunger 291 are connected via an appropriate mechanism such as a pin or a long hole so that the plunger 291 rotates clockwise about the second support shaft 21.
Reference numerals 311, 312 and 313 are welding wire guide bases.

In the above configuration, as shown in FIG. 1, the pressurizing lever 5 is used while being biased by the spring biasing means 13. First, the operation of inserting a welding wire will be described. In FIG. 1, when power is supplied to the electromagnetic solenoid 29, the plunger 291 is retracted by a desired stroke, whereby the first link 16 rotates clockwise about the second support shaft 21 as a fulcrum. When the first link 16 is rotated, the second link 22 rotatably supported by the first link 16 through a pin 23 is moved in the Z ₁ direction.

By the way Z ₁ direction of the end portion of the second link 22 is supported by the third link 24 through a pin 26, and because it is supported by a frame 3 via the third link 24 is pin 25 The correction roller 27 on the moving side, which is pivotally supported by the pin 26, is rotated clockwise about the pin 25 as a fulcrum. That is, as shown in FIG. 5, the fixing rollers 28, 28 on the fixed side and the correction roller 27 on the moving side are separated from each other in the Z direction to secure a space for inserting a welding wire.

On the other hand, when power is not supplied to the electromagnetic solenoid 29, the pressure lever 5 urged by the spring force urging means 13 moves counterclockwise with the first support shaft 6 as a fulcrum in FIG. It is maintained in a biased state. In this case, the engagement means 19 including the engagement pin 18 supported by the pressure lever 5 and the opening groove 17 provided at the distal end of the first link 16 is in the engaged state.

As shown in FIG. 1, an electromagnetic solenoid 2
When the plunger 291 of FIG. 9 is retracted, the first link 16 rotates clockwise about the second support shaft 21, but since the engagement means 19 is in the engaged state as described above, the first link 16 is rotated. The pressure lever 5 also rotates with the rotation of. That is, in this case, the pressure lever 5 is rotated clockwise around the first support shaft 6 against the spring force of the spring force urging means 13. In this way, as shown in FIG.
Since the pressure roller 14 is separated from the feed roller 15,
The insertion space for the welding wire is secured.

As described above, when the electromagnetic solenoid 29 is energized, the pressure roller 14 and the correction roller 27 on the moving side are simultaneously retracted to desired positions. Therefore, the operator can be easily inserted through the welding wire from the X ₂ direction to the X ₁ direction manually. Of course, at the time of the insertion operation, since each component is positioned at the retracted position, there is no danger that unexpected self-generation will occur due to the rotatable component as in the related art.

Further, the plunger 291 becomes free if the power supply to the insertion plate and the electromagnetic solenoid 29 is cut off. For this reason, since the pressure lever 5 is biased by the spring force of the spring force biasing means 13, the pressure lever 5 is rotated counterclockwise about the first support shaft 6, and the pressure roller 14 and the feeding roller are rotated. 15, the welding wire is clamped.

When the pressure lever 5 is rotated by the spring force of the spring force urging means 13, the first link 16 is moved together with the rotation of the pressure lever 5 by the engagement means 19 in the engaged state. It rotates counterclockwise about the second support shaft 21 as a fulcrum. For this reason, the welding wire is applied to the straightening rollers 27, 28,
The state is corrected by 28.

That is, after the welding wire is inserted, the supply of the welding wire can be set by simply interrupting the power supply to the electromagnetic solenoid 29. Therefore, the welding wire can be exchanged quickly.

Adjusting the biasing spring force by operating the handle is the same as in a conventional feeding device,
When using welding wires of the same diameter, it goes without saying that it is only necessary to make adjustments when the welding wire is first inserted.

That is, in the present invention, the spring force urging means 13 only needs to be adjusted once, and the operation of the spring force urging means 13 is not performed at all when the welding wire is replaced. Regardless, the welding wire can be fed with a constant urging force, and a stable welding result can be always obtained.

Next, a second embodiment according to the present invention will be described. Since 1 to 21 and 27 to 29 are the same as in the first embodiment, the details thereof are omitted. 6 to 8, reference numeral 32 denotes a support bracket attached to the fixed side, reference numeral 33 denotes a fourth link which is pivotally supported by the support bracket 32 by a pin 34, and reference numeral 35 denotes which is supported by a plunger 291 of the first link driving means 29. The fifth link 35, the free end of the fifth link 35 and the first link 16
And the fourth link 33 are supported by a pin 36. In addition, a long hole 161 in the Z direction is formed at a free end of the first link 16, and a pin is engaged in the long hole 161.

Reference numeral 37 denotes a nut member.
Is formed with a protruding shaft 371.
Accordingly, the sixth link 38 and the fourth link 33 are rotatably supported. The sixth link 38 has a long hole 381.
Are formed, and the protruding shaft 371 is engaged with the elongated hole 381. The end of the sixth link 38 is rotatably supported by a projecting member 301 of the frame 3 via a pin 39. For example, in the case shown, the projecting member 301 is screwed to the welding wire guide base 312, and the guide base 31
2 is fastened to the frame 3 so that the projecting member 30
1 is supported integrally with the frame 3.

A third link 41 rotatably supports the correction roller 27 on the moving side. One end of the third link 41 is pivotally supported by a projecting member 301 of the frame via a pin 42. A seventh link 44 is rotatably supported at the other end of the third link 41 via a pin 43.

For example, the seventh link 44 is formed in an L shape as shown in FIG. 8, and a screw shaft 45 is rotatably supported on the seventh link 44. The screw shaft 45 is screwed to the nut member 37.

In the above configuration, except for the replacement of the pressure roller 14 and the repair of each part of the apparatus, the present invention relates to the so-called welding wire feeding at the time of welding wire feeding and welding wire insertion work. During operation, the pressure lever 5 is used while being biased by the spring biasing means 13. For this reason,
An engaging means 19 comprising an engaging pin 18 supported by the pressure lever 5 and an opening groove 17 provided at the tip of the first link 16 is always in an engaged state. In this state, the power supply to the electromagnetic solenoid 29 is turned on and off to select and generate the welding wire feeding state and the welding wire insertion state as in the first embodiment.

Firstly, in the state shown in FIG. 6, the plunger 291 is energized the electromagnetic solenoid 29 is pulled, the pin 36 through the fifth link 35 is positioned displaced leftward, i.e. X ₁ direction. Due to the displacement of the pin 36, the fourth link 33 is rotated counterclockwise about the pin 34 as a fulcrum. In this case, since the elongated hole 161 provided at the end of the first link 16 and the pin 36 are engaged, the first link 16 is rotated clockwise about the second support shaft 21 as a fulcrum. You. In this case, of course, in this case,
Since the end of the X ₁ direction of the pressure lever 5 is positioned displaced upwards, the pressure lever 5, as well as shown in FIG. 1, a predetermined amount of times in a clockwise direction first support shaft 6 as a fulcrum Be moved.

The fourth link 3 with the pin 34 as a fulcrum
When the third link 3 is rotated, the sixth link 38 and the third link 41 are tilted via links and pins appropriately disposed at the distal end of the fourth link 33.

As described above, by energizing the electromagnetic solenoid 29, as shown in FIG.
4 and the correction roller 27 on the moving side are simultaneously retracted to desired positions.

In this state, when the power supply to the electromagnetic solenoid 29 is cut off after the welding wire is inserted, the spring force of the spring force urging means 13 acting on the pressure lever 5 and the first link 16 via the engaging means 19. As a result, the pressure lever 5 uses the first support shaft 6 as a fulcrum, and the first link 16 connects to the second support shaft 21.
Are pivoted counterclockwise around the fulcrum. Of course, the first
When the link 16 is rotated, the third link 41 to the seventh link 44 connected and arranged on the end side of the first link 16 are appropriately rotated.

That is, when the power to the electromagnetic solenoid 29 is cut off after the welding wire is inserted, as shown in FIG. 6, the welding wire is sandwiched between the pressing roller 14 and the feeding roller 15, and the straightening roller is fixed. The welding wire is corrected by 27, 28, 28.

According to the second embodiment, for example, in FIG. 6, by rotating the screw shaft 45, the position of the third link 41 that supports the correction roller 27 on the moving side is changed. The adjustment rollers 27 and 2 can be adjusted.
The correction state of the welding wire according to 8, 28 can be freely selected.

Of course, in the first embodiment, the second link 22 shown in FIGS. 1 and 4 is divided into two in the direction orthogonal to the long axis direction, and these are connected by adjusting screw means for screw connection. The straightening state of the welding wire can be adjusted.

Further, as the first link driving means 29, a hydraulic cylinder can be used. In this case, when the welding wire is in the feeding state, the fluid pressure is not operated on the cylinder, that is, the movement of the cylinder rod of the cylinder is set free, and the fluid pressure is operated on the cylinder during the insertion work of the welding wire. Then, the cylinder rod is displaced to the end of the cylinder. That is, the fluid pressure operation cylinder is operated such that the first link 16 is displaced by a desired amount in the direction opposing the spring force of the spring force urging means 13. After the welding wire is inserted, the electromagnetic switching valve and the fluid pressure control circuit are appropriately operated so that the movement of the cylinder rod is free, so that the welding force is supplied by the spring force urging means 13 as a matter of course. .

Furthermore, the components for mounting the engaging pin 18 and the opening groove 17 forming the engaging means 19 can be reversed. That is, the pressing lever 5 is provided with an opening groove 17 that opens downward, and the engaging pin 18 is provided on the first link so that the engaging pin 18 is disposed at a position below the opening groove 17. it can.

[0034]

As is apparent from the above description, the welding wire feeder according to the present invention has a first link pivotally supported on the frame by a support shaft parallel to the support shaft of the pressure lever. , Provided at one end of the first link and the pressure lever, the pressure lever alone can be tilted in a direction opposing the urging force of the spring force urging means, and with respect to the urging direction of the urging means. An engagement means for tilting the first link and the pressure lever while engaging the same, and a first link and a pressure lever provided at the other end of the first link via the engagement means. First link driving means for tilting in a direction against the urging force of the urging means and the moving-side correction roller supported on the other end of the first link are provided, and when the welding wire is replaced, The first link and the pressure lever are driven by the one-link driving means against the urging force of the urging means. For saving the respective desired positions, thereby making it possible to easily insert the welding wire by using an insertion space is secured.

Of course, in the insertion operation of the welding wire, the first link drive means retracts the first link and the pressure lever to desired positions against the urging force of the spring force urging means. As described above, there is no possibility that an unexpected accident may occur due to the rotatable component, and therefore, the welding wire can be safely inserted.

Further, after the welding wire is inserted, the first link driving means is appropriately operated, and the first link and the pressure lever are rotated by the spring force of the spring force urging means via the engaging means, so that the force is applied. Since the welding wire is clamped by the pressure roller and the feed roller, and the welding wire is straightened by the straightening roller, the welding wire can be fed. Can be performed. Of course, as described above, when the welding wire is fed, the pressure roller is urged toward the feeding roller side by the spring force of the spring force urging means to clamp the welding wire.
The welding wire can be fed uniformly over a long period of time.

[Brief description of the drawings]

FIG. 1 is a partial sectional front view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is an explanatory diagram of the operation in FIG. 1;

FIG. 6 is a partial sectional front view showing a second embodiment of the present invention.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

8 is a sectional view taken along line VIII-VIII in FIG. 6;

FIG. 9 is an explanatory diagram of the operation in FIG. 6;

FIG. 10 is a front sectional view showing a conventional example.

[Explanation of symbols]

3… Frame, 5… Pressure lever,
6 first spindle, 13 spring biasing means, 14 pressure roller, 15 feed roller, 16 first link, 19 engaging means, 21 second spindle, 27 ... Straightening roller on the moving side, 28. Straightening roller on the fixed side, 29.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23K 9/133 B23K 9/12 311

Claims (1)

(57) [Scope of request for utility model registration] 1. A fixing lever for fixing a welding wire by a fixing roller on a fixed side and a moving side, and a pressure lever for supporting a pressure roller is pivotally supported on a frame, and is applied by a spring force urging means via the pressure lever. In a welding wire feeding device for feeding a welding wire while urging a pressure roller toward a feeding roller, a first link pivotally supported on a frame by a support shaft parallel to a support shaft of a pressure lever. , Provided at one end of the first link and the pressure lever, the pressure lever alone can freely tilt in a direction opposing the urging force of the urging means, and with respect to the urging direction of the urging means. Is provided at the other end of the first link and engages the first link and the pressure lever with the first link and the pressure lever via the engagement means. First link driving means for tilting in a direction opposing the urging force of the urging means And a correcting roller on the moving side supported on the other end of the first link.