JP2014161877A - Wire supply mechanism, wire feed device, and arc system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire supply mechanism which can reduce a radial load applied on a feed member.SOLUTION: A wire supply mechanism includes: a feed member 53 having a feed roller 535 rotating in a first direction; a press member 54 having a press roller 545 rotating in the first direction; and a load reducing member 55 having a load reducing rotation body 555 rotating in the first direction. The feed member 53 includes a rotation shaft of the feed roller 535 extending in the first direction. The press roller 545 applies force F1 toward a second direction X2 orthogonal to the first direction on the feed roller 535 in a state where a wire 891 is sandwiched with the feed roller 535. The load reducing rotation body 555 applies force F2 toward a third direction X3 on the feed member 53.

Description

  The present invention relates to a wire supply mechanism, a wire feeding device, and an arc system.

  Patent Literature 1 discloses a welding wire feeding device. The welding wire feeding device disclosed in this document includes a feeding roller and a pressure roller. With the welding wire sandwiched between the feeding roller and the pressure roller, the feeding roller and the pressure roller rotate. Thereby, the welding wire is fed in a desired direction.

JP-A-57-121880

  In the configuration disclosed in this document, a force is applied to the feeding roller from the pressure roller in order to sandwich the welding wire. Thus, the feeding member (feeding roller and the rotating shaft of the feeding roller) receives a radial load. In such a case, wear of the rotating shaft of the feeding roller and the bearing holding the rotating shaft is likely to occur, and the life of the rotating shaft and the bearing is shortened.

  The present invention has been conceived under the circumstances described above, and its main object is to provide a wire supply mechanism capable of reducing the radial load received by the feeding member.

  According to the first aspect of the present invention, a feeding member including a feeding roller that rotates around a first direction, a pressing member that includes a pressing roller that rotates around the first direction, and a rotation around the first direction. A load reducing member including a load reducing rotator, wherein the feeding member includes a rotation shaft of the feeding roller extending along the first direction, and the pressing roller includes the feeding roller. A force is applied to the feed roller in a second direction orthogonal to the first direction with the wire sandwiched between the load rollers, and the load reducing rotator is applied to the feed member in the second direction. A wire supply mechanism is provided that provides a force in a third direction opposite to the direction.

  Preferably, the load reducing rotator is in direct contact with the feeding roller.

  Preferably, the pressing member includes a roller supporting part that supports the pressing roller, and the load reducing member includes a rotating body supporting part that supports the load reducing rotating body, and the roller supporting part and the rotating body support. A force applying mechanism coupled to a component, wherein the force applying mechanism applies a predetermined amount of force to the roller support component in the second direction, and the force support mechanism applies the first force to the rotating member support component. The force of the predetermined magnitude is applied in three directions.

  Preferably, the force applying mechanism is disposed at a position that avoids a wire feeding path through which the wire is fed.

  Preferably, in a state where the wire is sandwiched, the magnitude of the force that the pressing roller applies to the feeding roller in the second direction and the force that the load reducing member applies to the feeding roller in the third direction. Are the same as each other.

  Preferably, the load reducing rotator is a roller having a diameter smaller than that of the pressing roller.

  Preferably, the load reducing member includes an additional load reducing rotator that rotates around the first direction, and the load reducing rotator and the additional load reducing rotator are opposite to each other with respect to a virtual plane. The virtual plane includes a rotation center line of the feeding roller and is parallel to the first direction and the second direction.

  Preferably, a support member that supports the feeding member, the pressing member, and the load reducing member is further provided.

  Preferably, a drive mechanism for rotating the feeding roller is further provided.

  Preferably, the drive mechanism includes a motor, and the motor is directly connected to the rotating shaft.

  Preferably, the drive mechanism includes a motor and a speed reducer that reduces the rotational speed of the motor, and the speed reducer is directly connected to the rotating shaft.

  According to a second aspect of the present invention, there is provided a wire feeding device comprising: a wire supply mechanism provided by the first aspect of the present invention; and a wire reel hub to which a wire reel wound with a wire is attached. The

  According to a third aspect of the present invention, an arc system comprising: a wire supply mechanism provided by the first aspect of the present invention; and a robot that performs an arc process using the wire supplied by the wire supply mechanism. Is provided.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a front view of the arc system concerning a 1st embodiment of the present invention. It is a front view of the wire feeding apparatus concerning 1st Embodiment of this invention. FIG. 3 is a partially enlarged view of the wire supply mechanism shown in FIG. 2. FIG. 4 is a cross-sectional view (partially omitted) taken along line IV-IV in FIG. 3. It is a figure which shows typically the positional relationship of the feed roller, press roller, and load reduction rotary body concerning 1st Embodiment of this invention. It is sectional drawing which shows the other example of the wire supply mechanism concerning 1st Embodiment of this invention (a part of composition is omitted). It is a front view of the wire supply mechanism concerning 2nd Embodiment of this invention. It is a front view of the wire supply mechanism concerning 3rd Embodiment of this invention. It is a figure which shows typically the positional relationship of the feed roller, press roller, load reduction rotary body, and additional load reduction rotary body concerning 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

<First Embodiment>
1st Embodiment of this invention is described using FIGS.

  FIG. 1 is a front view of an arc system according to a first embodiment of the present invention.

  An arc system A1 shown in FIG. 1 includes a robot 1, a wire feeding device 2, and a torch 3.

  The robot 1 performs arc processing on the base material W. Examples of such arc treatment include welding and thermal spraying. In the present embodiment, the robot 1 automatically performs arc welding on the base material W. The robot 1 is an articulated robot, for example.

  The wire feeding device 2 is for feeding the wire 891 to the torch 3. FIG. 1 schematically shows the wire feeder 2.

  FIG. 2 is a front view of the wire feeding device according to the first embodiment of the present invention.

  The wire feeding device 2 includes a frame 21, a wire supply mechanism 23, a wire guide 25, and a wire reel hub 27. The wire feeding device 2 often includes a cover, but the illustration of the cover is omitted in FIG. 2 for convenience of understanding.

  The frame 21 is made of metal, for example. In the present embodiment, the frame 21 has a bottom plate, a side plate, and the like. Each side plate is erected on the bottom plate. The wire reel hub 27 is fixed to a side plate in the frame 21. A wire reel 29 around which a wire 891 is wound is attached to the wire reel hub 27. Thereby, the wire reel 29 is rotatably fixed to the frame 21. The wire guide 25 is fixed to the frame 21. The wire guide 25 guides the wire 891 being fed. Specifically, a hole for inserting the wire 891 is formed in the wire guide 25. As a result, the wire guide 25 appropriately guides the wire 891 fed from the wire supply mechanism 23 to the outside of the wire feeding device 2.

  The wire supply mechanism 23 is for supplying the wire 891 to the base material W (see FIG. 1) side. In the present embodiment, the wire supply mechanism 23 supplies the wire 891 to the torch 3. The wire supply mechanism 23 is fixed to the frame 21.

  FIG. 3 is a partially enlarged view of the wire supply mechanism shown in FIG. 4 is a cross-sectional view (partially omitted) taken along line IV-IV in FIG.

  As shown in FIGS. 2 to 4, the wire supply mechanism 23 includes a support member 51, a drive mechanism 52, a feed member 53, a pressing member 54, a load reducing member 55, a force applying mechanism 57, and a bearing. 59.

  The support member 51 is made of, for example, metal, and supports the drive mechanism 52, the feeding member 53, the pressing member 54, the force applying mechanism 57, and the bearing 59. The support member 51 is supported by the frame 21.

  The feeding member 53 is a member for feeding the wire 891 in a desired direction in cooperation with the pressing member 54. In the present embodiment, the feeding member 53 is a member that rotates around the first direction X1. The feeding member 53 includes a rotation shaft 533 and a feeding roller 535. The feeding member 53 is supported rotatably with respect to the support member 51.

  A rotation shaft 533 is a rotation shaft of the feeding roller 535. The rotation shaft 533 extends along the first direction X1. The rotation shaft 533 is supported rotatably with respect to the support member 51. In the present embodiment, the rotation shaft 533 is supported with respect to the support member 51 via a bearing 59. The rotation shaft 533 rotates around the first direction X1.

  The feed roller 535 is fixed to the rotation shaft 533. Therefore, as the rotation shaft 533 rotates in the first direction X1, the feed roller 535 rotates around the first direction X1. The feeding roller 535 performs a function of feeding the wire 891 together with a pressing roller 545 (described later). In the present embodiment, the feeding roller 535 has a disk shape. The feed roller 535 has a roller peripheral surface 535a. The roller peripheral surface 535a faces the radial direction side of the axis of the rotation shaft 533. A groove 535b is formed in the feed roller 535. The groove 535b is recessed from the roller peripheral surface 535a. The groove 535b is formed to guide the wire 891.

  The drive mechanism 52 is for rotating the feed roller 535 (in this embodiment, the feed member 53, that is, the rotation shaft 533 and the feed roller 535). The drive mechanism 52 is fixed to the support member 51. In the present embodiment, the drive mechanism 52 includes a motor 521 and a speed reducer 523. The rotation of the motor 521 is transmitted to the feeding member 53 (the rotating shaft 533 and the feeding roller 535) with the rotational speed reduced by the speed reducer 523. Thereby, the rotating shaft 533 and the feed roller 535 rotate around the first direction X1. Thus, in the present embodiment, the feed roller 535 functions as a drive roller. The positional relationship between the motor 521 and the speed reducer 523 may be anything. In the present embodiment, the motor 521 is disposed on the upper side of FIG. In the example shown in FIG. 4, the speed reducer 523 is directly connected to the rotating shaft 533. Further, as shown in FIG. 6, the drive mechanism 52 may not have the speed reducer 523. In the example shown in FIG. 6, the motor 521 is directly connected to the rotating shaft 533.

  The pressing member 54 sandwiches the wire 891 between the feeding roller 535 and presses the wire 891 against the inner surface of the groove 535b. Thereby, the pressing member 54 presses the feeding roller 535 via the wire 891. The pressing member 54 includes a roller support component 541, a rotating shaft 543, and a pressing roller 545.

  The roller support component 541 is rotatably supported by the support member 51. The roller support component 541 rotates around the shaft 549. The rotation shaft 543 is a rotation shaft of the pressing roller 545. The rotation shaft 543 extends along the first direction X1. The rotation shaft 543 is fixed to the roller support component 541.

  The pressing roller 545 is rotatably supported by the rotation shaft 543 and rotates around the first direction X1. FIG. 5 is a diagram schematically showing the positional relationship between the feeding roller 535, the pressing roller 545, and a load reducing rotator 555 (described later). The pressing roller 545 presses the feeding roller 535 with the wire 891 sandwiched between the pressing roller 535 and the feeding roller 535. Specifically, the pressing roller 545 applies a force F1 in the second direction X2 orthogonal to the first direction X1 to the feeding roller 535 in a state where the wire 891 is sandwiched between the pressing roller 535 and the feeding roller 535. . Thereby, the feeding member 53 receives a radial load in the second direction X2. In the present embodiment, the second direction X2 coincides with the direction from the rotation center line L4 of the pressing roller 545 toward the rotation center line L3 of the feeding roller 535. A mechanism (force applying mechanism 57) for the pressing roller 545 to apply the force F1 to the feeding roller 535 will be described later. The rotation direction of the pressing roller 545 is opposite to the rotation direction of the feeding roller 535. In this embodiment, the pressing roller 545 functions as a driven roller of the feeding roller 535 that is a driving roller. When the pressing roller 545 and the feeding roller 535 are rotated with the wire 891 interposed therebetween, a frictional force acts on the wire 891 from the pressing roller 545 and the feeding roller 535, and the wire 891 is fed. In this embodiment, the wire 891 is fed rightward in FIG. In FIG. 3, the wire feeding path P1 and the wire 891 through which the wire 891 is fed are indicated by a two-dot chain line. The wire feeding path P1 is directed rightward in FIG. 3 from between the feeding roller 535 and the pressing roller 545.

  As shown in FIGS. 3 and 4, in this embodiment, the pressing roller 545 has a disk shape. The pressing roller 545 has a roller peripheral surface 545a. The roller peripheral surface 545a faces the radial side of the axis of the rotation shaft 543. The roller peripheral surface 545a faces the roller peripheral surface 535a of the feeding roller 535. The wire 891 is fed by rotating the pressing roller 545 and the feeding roller 535 while the wire 891 is sandwiched between the roller peripheral surface 545a and the feeding roller 535.

  The load reducing member 55 shown in FIGS. 3 to 5 is for reducing the radial load received by the feeding member 53. The load reducing member 55 includes a rotating body support component 551, a rotating shaft 553, and a load reducing rotating body 555.

  The rotating body support component 551 is rotatably supported by the support member 51. The rotating body support component 551 rotates around the shaft 559. The rotating shaft 553 is a rotating shaft of the load reducing rotating body 555. The rotation shaft 553 extends along the first direction X1. The rotating shaft 553 is fixed to the rotating body support component 551.

  The load reducing rotator 555 is rotatably supported by the rotation shaft 553 and rotates around the first direction X1. In this embodiment, the load reducing rotator 555 is a roller. As shown in FIG. 5, the load reducing rotator 555 applies a force F <b> 2 toward the third direction X <b> 3 opposite to the second direction X <b> 2 to the feeding member 53. Thereby, the radial load which the feeding member 53 receives is reduced. In the present embodiment, the third direction X3 coincides with the direction from the rotation center line L5 of the load reducing rotator 555 toward the rotation center line L3 of the feed roller 535. In the present embodiment, the load reduction rotating body 555 is in direct contact with the feeding roller 535. Then, the load reducing rotator 555 applies a force F <b> 2 directly to the feeding roller 535. Further, in the state where the pressing roller 545 and the feeding roller 535 sandwich the wire 891, the magnitude of the force F1 in the second direction X2 that the pressing roller 545 applies to the feeding roller 535, and the load reducing member 55 (in this embodiment). It is preferable that the magnitudes of the forces F2 in the third direction X3 applied to the feeding roller 535 by the load reducing rotator 555) are the same. The rotation direction of the load reducing rotator 555 is opposite to the rotation direction of the feeding roller 535. In this embodiment, the load reduction rotator 555 functions as a driven roller of the feed roller 535 that is a drive roller. In the present embodiment, the diameter of the load reducing rotator 555, which is a roller, is the same as the diameter of the pressing roller 545.

  In the present embodiment, the load reducing rotator 555 has a disk shape. The load reducing rotator 555 has a rotator circumferential surface 555a. The rotating body circumferential surface 555a faces the radial direction of the axis of the rotating shaft 553. The rotating body circumferential surface 555a faces the roller circumferential surface 535a of the feeding roller 535.

  The force applying mechanism 57 shown in FIGS. 3 and 4 is for pressing the pressing roller 545 against the feeding roller 535. The force applying mechanism 57 connects the roller support component 541 and the rotating body support component 551. As shown in FIG. 4, the force applying mechanism 57 is disposed at a position that avoids the wire feeding path P <b> 1. This is to prevent the force applying mechanism 57 from interfering with the feeding of the wire 891. The specific configuration of the force imparting mechanism 57 may be any, but in the present embodiment, it is as follows.

  The force applying mechanism 57 includes a handle 571, a bar 572, a spring 573, a pin 575, and an intermediate member 579.

  The rod 572 is connected to the rotating body support component 551 through a pin 575. 3 and 4, the rod 572 extends from the rotating body support component 551 along the third direction X3. As clearly shown in FIG. 4, the bar 572 is arranged at a position that avoids the wire feeding path P1. That is, as described above, the force applying mechanism 57 is disposed at a position that avoids the wire feeding path P1. The spring 573 is fitted into the rod 572 and surrounds the rod 572. The handle 571 is fixed to the rod 572. The handle 571 is rotated around the extending direction of the bar 572, so that the bar 572 slightly advances and retreats with respect to the handle 571 along the extending direction of the bar 572. Thereby, the degree of contraction of the spring 573 (that is, the elastic force generated by the spring 573) is adjusted.

  As shown in FIG. 4, since the spring 573 is kept in a contracted state in the force applying mechanism 57, the downward force of the spring 573 is a downward force with respect to the tip 541 a of the roller support component 541 via the intermediate member 579. Is given. Thereby, a force F3 having a predetermined magnitude is applied to the roller support component 541 in the second direction X2. On the other hand, the upper portion of the spring 573 gives an upward force to the handle 571. Accordingly, the force F4 having the predetermined magnitude is applied to the rotating body support component 551 in the third direction X3 via the bar 572 fixed to the handle 571. The magnitudes of the force F4 and the force F3 are the same. In other words, the roller support component 541 and the rotating body support component 551 are given forces in the opposite directions and the same magnitude via the spring 573.

  Since the roller support component 541 is supported by the support member 51 so as to be rotatable about the shaft 549, the roller support component 541 is fixed to the roller support component 541 when a force F3 in the second direction X2 is applied to the roller support component 541. The pressing roller 545 is pressed against the feeding roller 535. As a result, the above-described force F1 is applied to the feed roller 535.

  On the other hand, since the rotating body support component 551 is supported by the support member 51 so as to be rotatable about the shaft 559, when the force F4 in the third direction X3 is applied to the rotating body support component 551, the rotation body support component The load reducing rotating body 555 supported by the 551 is pressed against the feeding roller 535. As a result, the above-described force F2 is applied to the feed roller 535. The magnitudes of the force F2 and the force F1 are the same.

  Unlike the present embodiment, the force application mechanism 57 does not necessarily have the spring 573 or the like. For example, the force applying mechanism 57 may be a mechanism that simply fixes the roller support component 541 and the rotating body support component 551 while sandwiching them from above and below.

  Unlike this embodiment, the pressing roller 545 uses one force applying mechanism to press the feeding roller 535, and the load reducing rotator 555 uses another force applying mechanism to press the feeding roller 535. It may be used.

  The magnitudes of the force F1 and the force F2 are preferably the same, but unlike the present embodiment, the magnitudes of the force F1 and the force F2 may be different from each other. For example, the magnitude of the force F1 may be greater than the magnitude of the force F2, or the force F2 may be greater than the force F1.

  As shown in FIG. 2, in the present embodiment, the wire supply mechanism 23 further includes two rollers 58. The wire 891 wound around the wire reel 29 is guided by each roller 58, guided between the feeding roller 535 and the pressing roller 545, and sent out from the wire guide 25 to the outside of the wire feeding device 2. Unlike the present embodiment, the wire supply mechanism 23 may not include the roller 58.

  The torch 3 shown in FIG. 1 has a tube and a nozzle. The wire 891 fed by the wire feeding device 2 is supplied to the base material W side by being inserted through the tube and the nozzle.

  Next, the effect of this embodiment is demonstrated.

  In the present embodiment, the wire supply mechanism 23 includes a load reducing member 55. The load reducing member 55 includes a load reducing rotating body 555 that rotates around the first direction X1. The load reducing rotator 555 applies a force to the feeding member 53 in the third direction X3 opposite to the second direction X2. According to such a configuration, the radial load received by the feeding member 53 can be reduced. If the radial load received by the feeding member 53 can be reduced, wear of the rotating shaft 533 in the feeding member 53 can be prevented.

  Further, if the radial load received by the feeding member 53 can be reduced, the power of the motor 521 in the drive mechanism 52 can be reduced, and the motor 521 can be reduced in size. Thereby, size reduction of the wire supply mechanism 23 can be achieved. If the wire supply mechanism 23 can be downsized, the wire feeder 2 can be downsized in the present embodiment.

  Further, when the wire supply mechanism 23 includes the bearing 59 as in the present embodiment, wear of the bearing 59 can be prevented. If the radial load received by the feeding member 53 can be reduced, the power of the drive mechanism 52 required to rotate the feeding member 53 can be reduced. Thereby, size reduction of the motor 521 in the drive mechanism 52 can be achieved. This contributes to miniaturization of the wire supply mechanism 23.

  In the present embodiment, a force applying mechanism 57 connected to the roller support component 541 and the rotating body support component 551 is provided. The force applying mechanism 57 applies a force F3 having a predetermined magnitude in the second direction X2 to the roller support component 541, and also applies a force F4 having a predetermined magnitude in the third direction X3 to the rotating body support component 551. Add According to such a configuration, it is not necessary to use two force applying mechanisms to apply the forces F3 and F4 that are directed to opposite sides. This contributes to miniaturization of the wire supply mechanism 23.

  In the present embodiment, in the state where the wire 891 is sandwiched, the magnitude of the force F1 in the second direction X2 that the pressing roller 545 applies to the feeding roller 535 and the third direction that the load reducing member 55 applies to the feeding roller 535. The magnitudes of the forces F2 toward X3 are the same as each other. According to such a configuration, the radial load received by the feeding member 53 can be made substantially zero. As a result, the above-described advantages that can be obtained by reducing the radial load received by the feeding member 53 can be more effectively enjoyed.

  Below, the other form of a wire supply mechanism is demonstrated. In the following description, the same or similar components as those described above will be denoted by the same reference numerals as those described above, and description thereof will be omitted as appropriate.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIG.

  FIG. 7 is a front view of the wire supply mechanism according to the second embodiment of the present invention.

  In the wire supply mechanism 23A shown in the figure, the diameter of the load reduction rotating body 555 that is a roller is smaller than both the diameter of the pressing roller 545 and the diameter of the feeding roller 535. According to such a configuration, in addition to the operational effects described in the first embodiment, the following operational effects are achieved.

  In the present embodiment, it can be said that the diameter of the pressing roller 545 is relatively larger than the diameter of the load reducing rotating body 555. Such a configuration is suitable for enlarging a portion where the pressing roller 545 and the wire 891 rub against each other when the wire 891 is fed. Thereby, the frictional force from the pressing roller 545 to the wire 891 can be increased, and the wire 891 can be sent more firmly. On the other hand, in the present embodiment, it can be said that the diameter of the load reducing rotator 555 that is a roller is relatively smaller than that of the pressing roller 545. Unlike the pressing roller 545, the load reducing rotator 555 does not contact the wire 891. Therefore, even if the load reducing rotator 555 is small, the feeding of the wire 891 is not significantly affected. Therefore, according to the present embodiment, it is suitable for downsizing the wire supply mechanism 23 without significantly affecting the feeding of the wire 891.

<Third Embodiment>
A third embodiment of the present invention will be described with reference to FIGS.

  FIG. 8 is a front view of a wire supply mechanism according to a third embodiment of the present invention. FIG. 9 is a diagram schematically illustrating a positional relationship among the feeding roller, the pressing roller, the load reducing rotator, and the additional load reducing rotator according to the third embodiment of the present invention.

  The wire supply mechanism 23B shown in the figure is different from the wire supply mechanism 23A in that the load reducing member 55 further includes an additional rotating shaft 557 and an additional load reducing rotating body 558. The additional rotating shaft 557 and the additional load reducing rotator 558 are substantially the same as the rotating shaft 553 and the load reducing rotator 555 described above. This will be described below.

  The additional load reduction rotator 558 and the load reduction rotator 555 are positioned on opposite sides of the virtual plane VP. The virtual plane VP is a plane that includes the rotation center line L3 of the feeding roller 535 and is parallel to the first direction X1 and the second direction X2. In this embodiment, the rotation center line L52 of the additional load reduction rotator 558 and the rotation center line L51 of the load reduction rotator 555 are located on the opposite side with respect to the virtual plane VP. In FIG. 8, the additional load reduction rotator 558 is located on the left side of the virtual plane VP, while the load reduction rotator 555 is located on the right side of the virtual plane VP. Therefore, the rotation center line L52 of the additional load reduction rotator 558 is located on the left side of the virtual plane VP, while the rotation center line L51 of the load reduction rotator 555 is located on the right side of the virtual plane VP.

  The additional load reduction rotator 558 is rotatably supported by the additional rotation shaft 557 and rotates around the first direction X1. In this embodiment, the additional load reducing rotator 558 is a roller. As shown in FIG. 9, in the present embodiment, the additional load reduction rotator 558 applies a force F <b> 22 toward the third direction X <b> 3 opposite to the second direction X <b> 2 to the feeding member 53. On the other hand, the load reducing rotator 555 gives the feeding member 53 a force F21 in the third direction X3 opposite to the second direction X2. Thereby, the radial load which the feeding member 53 receives is reduced. Note that the sum of the force F21 and the force F22 corresponds to the force F2 in the first embodiment. In the present embodiment, the additional load reduction rotator 558 is in direct contact with the feed roller 535. Further, in the state where the pressing roller 545 and the feeding roller 535 sandwich the wire 891, the magnitude of the force F1 in the second direction X2 that the pressing roller 545 applies to the feeding roller 535, and the load reducing member 55 (in this embodiment). , The load reducing rotator 555 and the additional load reducing rotator 558) have the same magnitude of the force F2 (the resultant force of the force F21 and the force F22) in the third direction X3 applied to the feeding roller 535. It is preferable that there is. In this embodiment, the additional load reduction rotator 558 functions as a driven roller of the feed roller 535 that is a drive roller.

  Also in the present embodiment, as in the second embodiment, the diameters of the load reduction rotator 555 and the additional load reduction rotator 558 are smaller than both the diameter of the feeding roller 535 and the diameter of the pressing roller 545.

  According to such a configuration, in addition to the operational effects described in the second embodiment, the following operational effects are achieved.

  According to the present embodiment, the three parts of the pressure roller 545, the load reduction rotator 555, and the additional load reduction rotator 558 apply force to the feed roller 535. Therefore, the position shift of the feeding member 53 can be prevented. Thereby, the above-mentioned advantage which can be acquired by being able to reduce the radial load which feeding member 53 receives can be enjoyed more effectively.

  Unlike the present embodiment, the diameter of the load reduction rotator 555 and the additional load reduction rotator 558 may be the same as the diameter of the pressing roller 545. Alternatively, the diameter of the load reduction rotator 555 and the additional load reduction rotator 558 may be larger than the diameter of the pressing roller 545. Further, the diameter of the load reduction rotator 555, the diameter of the additional load reduction rotator 558, and the diameter of the pressing roller 545 may be different from each other.

  The present invention is not limited to the embodiment described above. The specific configuration of each part of the present invention can be changed in various ways.

  In the above-described embodiment, the example in which the load reducing rotator 555 and the additional load reducing rotator 558 are rollers has been described, but the present invention is not limited thereto. For example, the load reduction rotator 555 or the additional load reduction rotator 558 may be a gear.

  In the above description, the example in which the load reduction rotator 555 and the additional load reduction rotator 558 are in direct contact with the feeding roller 535 is shown, but the present invention is not limited to this. For example, the load reduction rotator 555 and the additional load reduction rotator 558 are in direct contact with the rotation shaft 533, and the load reduction rotator 555 and the additional load reduction rotator 558 directly apply a force to the rotation shaft 533. Also good.

  In the above description, an example in which the feeding roller 535 is a driving roller and the pressing roller 545 is a driven roller is shown, but the present invention is not limited to this. For example, the pressing roller 545 may be a driving roller, and the feeding roller 535 may be a driven roller.

  In the above description, the example in which the wire supply mechanism 23 is used in the wire feeding device 2 for pushing the wire 891 is shown, but the present invention is not limited to this. For example, the wire supply mechanism 23 may be used in a wire pull device. And the wire supply mechanism 23 may be provided in the torch.

DESCRIPTION OF SYMBOLS 1 Robot 2 Wire feeder 21 Frame 23, 23A, 23B Wire supply mechanism 25 Wire guide 27 Wire reel hub 29 Wire reel 3 Torch 51 Support member 52 Drive mechanism 521 Motor 523 Reducer 53 Feed member 533 Rotating shaft 535 Feed Roller 535a Roller circumferential surface 535b Groove 54 Press member 541 Roller support component 541a Tip 543 Rotating shaft 545 Press roller 545a Roller circumferential surface 549 Shaft 55 Load reducing member 551 Rotating body support component 553 Rotating shaft 555 Load reducing rotator 555a Rotating body circumferential surface 557 Additional rotating shaft 558 Additional load reduction rotating body 559 Shaft 57 Force applying mechanism 571 Handle 572 Rod 573 Spring 575 Pin 579 Intermediate member 58 Roller 59 Bearing 891 Wire A1 Arc system F1, F2, F21, F22, F , F4 force P1 wire feed path VP virtual plane X1 first direction X2 second direction X3 third direction W matrix L3 rotational centerline L4 rotational centerline L5 rotational centerline L51 rotational centerline L52 rotational axis

Claims (13)

A feeding member including a feeding roller rotating around a first direction;
A pressing member including a pressing roller rotating around the first direction;
A load reducing member including a load reducing rotating body that rotates around the first direction,
The feeding member includes a rotation shaft of the feeding roller extending along the first direction;
The pressing roller gives a force in a second direction orthogonal to the first direction to the feeding roller in a state where a wire is sandwiched between the pressing roller,
The wire supply mechanism, wherein the load reducing rotator applies a force toward a third direction opposite to the second direction to the feeding member.   The wire supply mechanism according to claim 1, wherein the load reducing rotator is in direct contact with the feeding roller. The pressing member includes a roller support component that supports the pressing roller,
The load reducing member includes a rotating body support component that supports the load reducing rotating body,
A force applying mechanism coupled to the roller support component and the rotating body support component;
The force applying mechanism applies a predetermined amount of force to the roller support component in the second direction, and applies the predetermined amount of force to the rotating body support component in the third direction. The wire supply mechanism according to claim 1 or 2, which is added.   The wire supply mechanism according to claim 3, wherein the force applying mechanism is disposed at a position that avoids a wire feeding path through which the wire is fed.   In a state where the wire is sandwiched, the magnitude of the force in the second direction that the pressing roller gives to the feeding roller, and the magnitude of the force in the third direction that the load reducing member gives to the feeding roller The wire supply mechanism according to any one of claims 1 to 4, wherein are the same as each other.   The wire supply mechanism according to any one of claims 1 to 5, wherein the load reducing rotator is a roller having a diameter smaller than a diameter of the pressing roller. The load reducing member includes an additional load reducing rotating body that rotates around the first direction,
The load reduction rotator and the additional load reduction rotator are located on opposite sides of the virtual plane,
The wire supply mechanism according to claim 1, wherein the virtual plane includes a rotation center line of the feeding roller and is parallel to the first direction and the second direction.   The wire supply mechanism according to claim 1, further comprising a support member that supports the feeding member, the pressing member, and the load reducing member.   The wire supply mechanism according to any one of claims 1 to 8, further comprising a drive mechanism for rotating the feed roller.   The wire supply mechanism according to claim 9, wherein the drive mechanism includes a motor, and the motor is directly connected to the rotating shaft.   The wire supply mechanism according to claim 9, wherein the drive mechanism includes a motor and a speed reducer that reduces the rotational speed of the motor, and the speed reducer is directly connected to the rotating shaft. A wire supply mechanism according to any one of claims 1 to 11,
A wire feeding device comprising: a wire reel hub to which a wire reel wound with a wire is attached. A wire supply mechanism according to any one of claims 1 to 11,
An arc system comprising: a robot that performs arc processing using the wire supplied by the wire supply mechanism.

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