JP2016190246A - Welding wire feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a welding wire feeder capable of easily adjusting pressurization force of pressurization rolls 5a and 5b.SOLUTION: A welding wire feeder having a holder pressurization mechanism 31 for pressurizing pressurization holders 12a and 12b, inserts an upper end part of a pressurization bolt 35 into a pressurization bolt insertion hole 34a of a lower pressurization spring holder, a compression spring 36 and a pressurization bolt insertion hole 33a of an upper pressurization spring holder. A lower end part of an upper pressurization spring holder 33 is inserted into a pressurization spring holder insertion hole 34b of the lower pressurization spring holder. The upper pressurization spring holder 33 and an upper end part of the lower pressurization spring holder 34 are inserted into a spring holder insertion hole 32b of a pressurization handle. The pressurization bolt 35 is inserted into a pressurization bolt insertion hole 32a of the pressurization handle. When an upper stop part 38 is screwed in an upper end part of the pressurization bolt 35, a lower stop part 37 of the pressurization bolt 35 abuts on a lower end part of the lower pressurization spring holder 34.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an improved welding wire feeder for feeding a welding wire used in consumable electrode gas shielded arc welding.

  In consumable electrode gas shielded arc welding, a welding wire feeding device is used to feed a welding wire stably. (For example, refer patent document 1.) Conventionally, the apparatus shown in FIG. 9 has been proposed as this welding wire feeding apparatus. FIG. 9 is an internal view of a conventional welding wire feeder 1. In the figure, a first feed roll 3 a of the welding wire feeder 1 is rotatably supported by the feeder body 8. The first feed roll 3 a is rotated by the feed motor 7 via the drive gear 2.

  The first pressure roll 5a is rotatably attached to the first pressure holder 12a. The left end portion of the first pressure holder 12a is rotatably supported by the feeding device body 8. Further, the right end portion of the first pressure holder 12a is pushed up in a direction away from the first feeding roll 3a by a spring force of a spring (not shown) attached to the first pressure holder 12a. .

  A welding wire 11 from a wire reel (not shown) is inserted from a wire insertion port 15, inserted through the center guide 10, and sent out from a wire delivery port 16.

  Next, FIG. 10 is an exploded view of the first holder pressing mechanism 17a of the conventional welding wire feeding device 1, and FIG. 11 is the first holder pressing mechanism 17a of the conventional welding wire feeding device 1. FIG. 10 and 11, the first compression spring 20a is provided in the first pressure spring holder 18a of the first holder pressure mechanism 17a. A male screw is formed at the upper end (X2 direction) of the first pressure bolt 19a, and a female screw is formed in the first pressure handle 23a. The upper end portion of the first pressure bolt 19a is inserted into the first pressure spring holder 18a and the compression spring 20a and screwed into the first pressure handle 23a.

  The lower end portion (X1 direction) of the first pressurizing bolt 19a is supported by the first support member 22a attached to the feeder main body 8 so as to be tiltable forward by the first fixing pin 21a. Moreover, the upper end part of the 1st pressurization volt | bolt 19a can be hooked on the right end part of the 1st pressurization holder 12a. The first pressure roll 5a pressurizes the first feed roll 3a. By rotating the first pressure handle 23a and tightening or loosening the screw of the first pressure handle 23a, the spring force of the first compression spring 20a is changed, and the first pressure roll The pressurizing force of 5a can be adjusted.

  An appropriate set value is determined by the material and diameter of the welding wire 11 for the pressing force of the first pressure roll 5a, and a setting scale (see FIG. 9) displayed on the first pressure spring holder 18a is a guide. Set to In order to adjust the pressurizing force of the first pressure roll 5a, the position of the lower end portion of the first pressure handle 23a is brought to the position corresponding to the setting scale displayed on the first pressure spring holder 18a. Next, the screw of the first pressure handle 23a is tightened or loosened.

  Second feeding roll 3b, second pressure roll 5b, second pressure holder 12b, second holder pressure mechanism 17b, second pressure spring holder 18b, second pressure bolt 19b, second pressure roll The second compression spring 20b, the second fixing pin 21b, the second support member 22b, and the second pressure handle 23b are composed of the first feeding roll 3a, the first pressure roll 5a, and the first pressure roll. Holder 12a, first holder pressure mechanism 17a, first pressure spring holder 18a, first pressure bolt 19a, first compression spring 20a, first fixing pin 21a, first support member 22a and first Each of the pressure handles 23a has the same function, and the description thereof is omitted.

  FIG. 9 shows a state in which the second holder pressurizing mechanism 17b is tilted forward, and shows a state in which the first holder pressurizing mechanism 17a is hooked on the right end portion of the first pressurizing holder 12a. .

  When the feed motor 7 is driven, the first feed roll 3 a and the second feed roll 3 b are rotated by the drive gear 2 connected to the feed motor 7. As a result, the welding wire 11 sandwiched between the first feeding roll 3a and the second feeding roll 3b and the first pressing roll 5a and the second pressing roll 5b is fed. The welding wire 11 delivered from the welding wire feeder is guided by a conduit cable (not shown) and fed to a welding torch (not shown).

JP 2010-099677 A

  As described above, in the conventional welding wire feeding device 1, every time the material or diameter of the welding wire 11 is changed, the welding operator holds the first pressure handle 23a of the first holder pressure mechanism 17a. By rotating, the spring force of the first compression spring 20a is changed to adjust the pressing force of the first pressure roll 5a. Since the first pressurizing handle 23a is screwed into the first pressurizing bolt 19a, the number of the first pressurizing handle 23a can be changed even if the applied pressure of the first pressurizing roll 5a is changed by one memory. I had to rotate it once. Furthermore, in order to make the position of the lower end part of the 1st pressurization handle 23a come to the position of the setting scale displayed on the 1st pressurization spring holder 18a, it is necessary to adjust visually. The change work was not easy and took a lot of work.

  An object of this invention is to provide the welding wire feeding apparatus which can adjust the pressurization force of the pressurization roll of a welding wire feeding apparatus easily.

In order to solve the above-described problems, the invention of claim 1
A pressure holder to which a pressure roll for feeding with a welding wire sandwiched between the feed roll and the pressure roll is attached;
In a welding wire feeding device provided with a holder pressing mechanism that pressurizes the pressing holder,
The holder pressing mechanism is
A pressure bolt provided with an upper stopper and a lower stopper;
A compression spring;
A pressure bolt insertion hole through which the pressure bolt is inserted is formed in the shaft center portion, and an upper pressure spring holder insertion hole into which an upper pressure spring holder and the compression spring to be described later are inserted is formed at the upper end portion, and the lower stopper A lower pressing spring holder that abuts the lower end and the lower end presses the pressing holder;
A pressurizing bolt insertion hole through which the pressurizing bolt is inserted in the shaft center, and an upper pressurizing spring holder that is biased upward by the compression spring;
A pressure bolt insertion hole through which the pressure bolt is inserted is formed in the shaft center portion, and an upper pressure spring holder insertion hole into which the upper pressure spring holder and the lower pressure spring holder are inserted is formed at the lower end portion, and the upper stopper portion A pressure handle that is in contact with the upper end, and
With
A pin is provided on the outer periphery of the upper pressure spring holder,
A locking portion is formed on the inner peripheral surface of the pressure handle to which the pin is hooked.
The locking portion includes a plurality of step portions each including a vertical portion formed in the axial direction of the pressure handle and an inclined portion inclined downward from an upper end portion of the vertical portion,
The welding wire feeding device according to claim 1, wherein the stepped portions of the locking portions are sequentially shifted downward in the pressure handle axial direction.

The invention of claim 2
The outer periphery of the pressure bolt is formed in a rectangular shape,
2. The pressure bolt insertion hole of the upper pressure spring holder and the pressure bolt insertion hole of the lower pressure spring holder are formed corresponding to the outer peripheral shape of the pressure bolt. It is a welding wire feeding apparatus of description.

The invention of claim 3
The welding wire feeding device according to claim 1 or 2, wherein two sets of the plurality of continuously formed step portions are formed on an inner peripheral surface of the pressure handle.

  The welding wire feeding device according to the present invention is configured so that the pressurizing handle 32 is slightly rotated to increase the pressurizing force of the first pressurizing roll 5a and the second pressurizing roll 5b. Since it can be changed, workability can be improved.

It is a figure which shows the holder pressurization mechanism 31 of the welding wire feeding apparatus of this invention. It is an exploded view of the holder pressurization mechanism 31 of the welding wire feeder of this invention. It is a figure which shows the internal structure of the holder pressurization mechanism 31 when the compression spring 36 of the welding wire feeder of this invention is extended. It is a figure which shows the internal structure of the holder pressurization mechanism 31 when the compression spring 36 of the welding wire feeder of this invention is extended. It is a figure which shows the internal structure of the holder pressurization mechanism 31 when the compression spring 36 of the welding wire feeder of this invention is compressed. It is a figure which shows the internal structure of the holder pressurization mechanism 31 when the compression spring 36 of the welding wire feeder of this invention is compressed. It is a figure which shows the upper pressurization spring holder 33 and the pressurization volt | bolt 35 of the welding wire feeding apparatus of this invention. It is a figure which shows the state which attached the upper pressurization spring holder 33 to the pressurization volt | bolt 35 of the welding wire feeding apparatus of this invention. It is an internal view of the conventional welding wire feeder 1. FIG. It is an exploded view of the 1st holder pressurization mechanism 17a of the conventional welding wire feeder 1. FIG. It is sectional drawing of the 1st holder pressurization mechanism 17a of the conventional welding wire feeding apparatus 1. FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. 1 is a view showing a holder pressurizing mechanism 31 of the welding wire feeding device of the present invention, and FIG. 2 is an exploded view of the holder pressurizing mechanism 31 of the welding wire feeding device of the present invention. 4 and 4 are diagrams showing the internal structure of the holder pressurizing mechanism 31 when the compression spring 36 of the welding wire feeding device of the present invention is extended. FIGS. 5 and 6 are diagrams showing the welding wire feeding of the present invention. FIG. 7 is a view showing the internal structure of the holder pressing mechanism 31 when the compression spring 36 of the apparatus is compressed, and FIG. 7 shows the upper pressing spring holder 33 and the pressing bolt 35 of the welding wire feeder of the present invention. FIG. 8 is a diagram showing a state in which the upper pressure spring holder 33 is attached to the pressure bolt 35 of the welding wire feeding device of the present invention.

  In the welding wire feeding device of the present invention, the mechanism and operation other than the holder pressing mechanism 31 are the same as those in the conventional welding wire feeding device 1 shown in FIGS. Since it is the same as the mechanism and operation except for the second holder pressurizing mechanism 17b, description thereof will be omitted. Moreover, in the following description, the holder pressurization mechanism 31 of the welding wire feeding device of the present invention is the first holder pressurization mechanism 17a and the second holder pressurization mechanism 17b of the welding wire feed device 1 of the prior art. In order to facilitate the explanation, the first holder pressurizing mechanism and the second holder pressurizing mechanism of the welding wire feeding device of the present invention will be described as the holder pressurizing mechanism 31.

  1 to 8, on the lower end side (X1 direction) of the pressurizing handle 32 of the holder pressurizing mechanism 31 of the welding wire feeding device of the present invention, the upper end portions of the upper pressurizing spring holder 33 and the lower pressurizing spring holder 34 are shown. A spring holder insertion hole 32b for inserting (X2 direction) is formed. A pressurizing bolt insertion hole 32 a through which the pressurizing bolt 35 is inserted is formed in the axial center portion of the upper end portion of the pressurizing handle 32. On the lower end side (X1 direction) of the upper pressure spring holder 33, a spring insertion hole 33b for inserting the compression spring 36 is formed. A pressurizing bolt insertion hole 33 a through which the pressurizing bolt 35 is inserted is formed in the axial center portion of the upper end portion (X2 direction) of the upper pressurizing spring holder 33. On the upper end side of the lower pressure spring holder 34, a spring holder insertion hole 34b for inserting the lower end portion of the upper pressure spring holder 33 and the compression spring 36 is formed. A pressurizing bolt insertion hole 34 a through which the pressurizing bolt 35 is inserted is formed in the axial center portion of the lower end portion of the lower pressurizing spring holder 34.

  As shown in FIG. 1, a setting scale A from 1 to 5 is displayed on the outer peripheral surface of the pressure handle 32, and a reference line B is displayed on the outer peripheral surface of the lower pressure spring holder 34. A pair of pins 33c and 33d fixed to the outer peripheral portion of the upper pressure spring holder 33 is provided on any one step portion of the plurality of step portions of the locking portion 32c formed on the inner peripheral surface of the pressure handle 32. Lock. By rotating the pressure handle 32, the corresponding setting scale A among the setting scales A from 1 to 5 can be made coincident with the reference line B.

  The relationship between the setting scale A and the applied pressure of the first pressure roll 5a and the second pressure roll 5b is set as follows, for example. When the setting scale A is 1, the pressing force of the first pressing roll 5a and the second pressing roll 5b is 25 [N]. When the setting scale A is 2, the pressing rolls 5a and 5b are applied. When the pressure is 50 [N], the setting scale A is 3, the applied pressure of the first pressure roll 5a and the second pressure roll 5b is 70 [N], and the setting scale A is 4. When the applied pressure of the first pressure roll 5a and the second pressure roll 5b is 90 [N] and the setting scale A is 5, the first pressure roll 5a and the second pressure roll 5b Is 110 [N]. When the pressurization handle 32 is rotated to the right, the setting scale A is increased and the applied pressure is increased. When the pressurization handle 32 is rotated to the left, the set scale A is decreased and the applied pressure is decreased.

  The setting scales 1 to 5 are also displayed on the back of the pressure handle 32 shown in FIG. 1, and when the pressure setting handle A is 5, the upper pressure spring holder A pair of pins 33 c and 33 d fixed to the outer peripheral portion of 33 is engaged with a step portion 32 c formed on the inner peripheral surface of the pressure handle 32 corresponding to 1 of the setting scale A on the back surface.

  The outer periphery of the pressure bolt 35 is formed in a rectangular shape, and the pressure bolt insertion hole 33 a of the upper pressure spring holder 33 and the pressure bolt insertion hole 34 a of the lower pressure spring holder 34 have the outer shape of the pressure bolt 35. Correspondingly formed. Thus, the relative relationship between the setting scale A and the reference line B is prevented from changing due to the rotation of the upper pressure spring holder 33 and the lower pressure spring holder 34 with respect to the pressure bolt 35.

  A pressure bolt 35 is inserted into the compression spring 36, the upper end side of the compression spring 36 is inserted into the spring insertion hole 33 b of the upper pressure spring holder 33, and the lower end side of the compression spring 36 is the spring holder insertion hole 34 b of the lower pressure spring holder 34. Has been inserted. A lower stopper 37 is fixed to the lower end of the pressurizing bolt 35. After the pressurizing bolt 35 is inserted into the pressurizing bolt insertion hole 34a of the lower pressurizing spring holder 34, the lower stopper 37 is moved to the lower part. The pressure spring holder 34 abuts around the pressure bolt insertion hole 34a. A female screw is formed at the upper end of the pressure bolt 35, a male screw is formed at the lower end of the upper stopper 38, and the upper stopper 38 is screwed to the upper end of the pressure bolt 35.

  In order to assemble the holder pressurizing mechanism 31, with the upper stopper 38 removed from the upper end of the pressurizing bolt 35, the upper end of the pressurizing bolt 35 is connected to the pressurizing bolt insertion hole 34 a of the lower pressurizing spring holder 34. The compression spring 36 is inserted into the pressure bolt insertion hole 33 a of the upper pressure spring holder 33. The lower end portion of the upper pressure spring holder 33 is inserted into the spring holder insertion hole 34 b of the lower pressure spring holder 34. The upper pressure spring holder 33 and the upper end portion of the lower pressure spring holder 34 are inserted into the spring holder insertion hole 32 b of the pressure handle 32. The pressure bolt 35 is inserted into the pressure bolt insertion hole 32 a of the pressure handle 32. The upper stopper 38 is screwed into the upper end of the pressure bolt 35. A lower stopper 37 of the pressure bolt 35 contacts the lower end of the lower pressure spring holder 34.

  The lower end portion (X1 direction) of the pressurizing bolt 35 is connected to the first fixing pin 21a and the second supporting member 22b attached to the feeder main body 8 shown in FIGS. Each of the second fixing pins 21b is supported to be tiltable. By hooking the lower end surface of the lower pressure spring holder 34 on the right end portion of the first pressure holder 12a and the left end portion of the second pressure holder 12b, the lower end portion of the lower pressure spring holder 34 is moved to the first additional portion. The pressure holder 12a and the second pressure holder 12b are each pressed.

  A pair of pins 33c and 33d are fixed to the outer periphery of the upper pressure spring holder 33 symmetrically with respect to the axis. On the inner peripheral surface of the pressurizing handle 32, a locking portion 32c is formed on which a pair of pins 33c and 33d of the upper pressurizing spring holder 33 are respectively hooked. The locking portion 32c is formed with a plurality of continuous step portions including a vertical portion formed in the axial direction of the pressure handle 32 and an inclined portion inclined downward from the upper end portion of the vertical portion. Each step portion of the locking portion 32 c is formed so as to be sequentially shifted downward in the axial direction of the pressure handle 32. Two sets of step portions formed in succession are continuously formed on the inner peripheral surface of the pressure handle 32.

  The operation will be described below. In the welding wire feeder of the present invention, when the material and diameter of the welding wire 11 are changed, the welding operator rotates the pressurizing handle 32 of the holder pressurizing mechanism 31 to change the spring force of the compression spring 36. Thus, the pressure applied to the first pressure roll 5a and the second pressure roll 5b is adjusted.

  For example, in order to increase the setting scale A from 3 to 4 in order to set the first pressure roll 5b and the first pressure roll 5b to 90 [N], the pressure handle 32 is turned to the right. In that case, a pair of pins 33 c and 33 d fixed to the outer peripheral portion of the upper pressurizing spring holder 33 slide on the inclined portion of the stepped portion of the locking portion 32 c formed on the inner peripheral surface of the pressurizing handle 32. . At this time, since the upper end direction in the axial direction of the pressure handle 32 is regulated by the upper stopper 38, the position of the upper pressure spring holder 33 is lowered with respect to the pressure handle 32 (X1 direction), 1 The pair of pins 33c and 33d are locked to the next step portion of the locking portion 32c, and the pressure handle 32 is fixed. At this time, the setting scale A 4 coincides with the reference line B. Thereby, the compression spring 36 is compressed, and the pressurizing force of the first pressure roll 5b and the first pressure roll 5b is increased and set to 90 [N].

  When setting scale A is returned to 1, further, pressurization handle 32 continues to be rotated to the right, setting scale A exceeds 5, and 1 of setting scale A displayed on the back of pressurization handle 32 is used as a reference. Match line B.

  As a result, the welding wire feeding device according to the present invention, for example, increases the setting scale A by one scale in order to increase the pressurizing force of the first pressure roll 5a and the second pressure roll 5b. Unlike the welding wire feeder of the technology, it is not necessary to rotate the screw of the first pressure handle 23a several times, and the pressure force can be easily changed by slightly rotating the pressure handle 32. Furthermore, when changing the pressurizing force of the first pressurizing roll 5a and the second pressurizing roll 5b, the welding wire feeding device of the prior art is such that the position of the lower end portion of the first pressurizing handle 23a is Since it was confirmed visually whether it came to the position corresponding to the setting scale displayed on the 1st pressurization spring holder 18a, work was complicated. In the welding wire feeding device of the present invention, when changing the pressurizing force of the first pressure roll 5a and the second pressure roll 5b, the pair of pins 33c and 33d of the upper pressure spring holder 33 is pressurized. In order to change the applied pressure of the first pressure roll 5a and the second pressure roll 5b so that the setting scale A coincides with the reference line B by being caught by the engaging portion 32c on the inner peripheral surface of the handle 32. The work time can be shortened. Therefore, workability can be improved.

DESCRIPTION OF SYMBOLS 1 Welding wire feeder 2 Drive gear 3a 1st feed roll 3b 2nd feed roll 5a 1st pressurization roll 5b 2nd pressurization roll 7 Feeding motor 8 Feeding device main body 10 Center guide 11 Welding wire 12a First pressure holder 12b Second pressure holder 15 Wire insertion port 16 Wire outlet 17a First holder pressure mechanism 17b Second holder pressure mechanism 18a First pressure spring holder 18b Second Pressure spring holder 19a first pressure bolt 19b second pressure bolt 20a first compression spring 20b second compression spring 21a first fixing pin 21b second fixing pin 22a first support member 22b first Second support member 23a First pressure handle 23b Second pressure handle 31 Holder pressure mechanism 32 Pressure handle 32a Pressure bolt insertion hole 32b Spring holder insertion hole 3 c Locking portion 33 Upper pressure spring holder 33a Pressure bolt insertion hole 33b Spring insertion holes 33c, 33d Pin 34 Lower pressure spring holder 34a Pressure bolt insertion hole 34b Spring holder insertion hole 35 Pressure bolt 36 Compression spring 37 Lower stop portion 38 Upper stop A Setting scale B Reference line

Claims (3)

A pressure holder to which a pressure roll for feeding with a welding wire sandwiched between the feed roll and the pressure roll is attached;
In a welding wire feeding device provided with a holder pressing mechanism that pressurizes the pressing holder,
The holder pressing mechanism is
A pressure bolt provided with an upper stopper and a lower stopper;
A compression spring;
A pressure bolt insertion hole through which the pressure bolt is inserted is formed in the shaft center portion, and an upper pressure spring holder insertion hole into which an upper pressure spring holder and the compression spring to be described later are inserted is formed at the upper end portion, and the lower stopper A lower pressing spring holder that abuts the lower end and the lower end presses the pressing holder;
A pressurizing bolt insertion hole through which the pressurizing bolt is inserted in the shaft center, and an upper pressurizing spring holder that is biased upward by the compression spring;
A pressure bolt insertion hole through which the pressure bolt is inserted is formed in the shaft center portion, and an upper pressure spring holder insertion hole into which the upper pressure spring holder and the lower pressure spring holder are inserted is formed at the lower end portion, and the upper stopper portion A pressure handle that is in contact with the upper end, and
With
A pin is provided on the outer periphery of the upper pressure spring holder,
A locking portion is formed on the inner peripheral surface of the pressure handle to which the pin is hooked.
The locking portion includes a plurality of step portions each including a vertical portion formed in the axial direction of the pressure handle and an inclined portion inclined downward from an upper end portion of the vertical portion,
The welding wire feeding device according to claim 1, wherein the stepped portions of the locking portions are sequentially shifted downward in the pressure handle axial direction. The outer periphery of the pressure bolt is formed in a rectangular shape,
2. The pressure bolt insertion hole of the upper pressure spring holder and the pressure bolt insertion hole of the lower pressure spring holder are formed corresponding to the outer peripheral shape of the pressure bolt. The welding wire feeding device as described.   The welding wire feeding device according to claim 1 or 2, wherein two sets of the plurality of continuously formed step portions are formed on an inner peripheral surface of the pressure handle.

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