JP4121059B2 - Fine wire feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wire supply device that continuously supplies fine wires to a moving body that repeatedly accelerates and stops, and more particularly to a fine wire supply device that supplies fine wires having a small wire diameter and a low strength.
[0002]
[Prior art]
FIG. 6 is a side view of a conventional wire supply device provided with a tension applying mechanism disclosed in, for example, Japanese Patent Laid-Open No. 6-310353 “Tension applying mechanism and tension control method in winding machine”. In FIG. 6, 5 is a wire as a wire. A tension spring 45 applies tension to the wire 5. A potentiometer 40 detects the tension of the tension spring 45. Reference numeral 37 denotes a tension arm attached to the potentiometer 40. The tension arm 37 applies tension to the wire 5 hung on the guide pulley 38. On the other hand, 50 is a movable piece attached to one side of the tension spring 45. An air cylinder 51 changes the initial position of the movable piece 50.
Next, the operation will be described. The wire 5 is supplied to a workpiece (not shown) via a tension pulley 36 provided with a hysteresis brake 35 and a guide pulley 38 attached to the tip of the tension arm 37.
[0003]
The tension applied to the wire 5 is applied by a tension spring 45 attached to the tension arm 37. Then, based on the detection result of the potentiometer 40 provided at the base end portion 37 a of the tension arm 37, the hysteresis brake 35 is operated. The initial position of the movable piece 50 that determines the magnitude of the tension is variable by the air cylinder 51.
[0004]
[Problems to be solved by the invention]
In the conventional wire supply device having such a configuration, a tension arm 37 that swings around a support shaft 39 is provided, a guide pulley 38 is provided at the distal end of the tension arm 37, and a tension is provided at the proximal end of the tension arm 37. A spring 45 is attached to form an insulator. Then, the wire 5 is put on the guide pulley 38, and the wire 5 is supplied to the workpiece while tension is applied to the wire 5 by a tension spring 45 and a tension pulley 36 (including a torque controller and a tension control clutch / brake).
[0005]
In the wire supply device having such a configuration, when the workpiece for supplying the wire 5 repeats abrupt acceleration / stop, the insulator cannot follow this movement, and the support for supporting the tension arm 37 at each rapid acceleration. Inertia torque is generated around the shaft 39. Further, the wire 5 is intermittently extended and stopped repeatedly. At this time, an inertia torque is generated in the tension pulley 36 and the guide pulley 63 as the rotating body.
[0006]
When inertia torque is generated in the tension pulley 36 or the guide pulley 63, the tension pulley 36 or the guide pulley 63 tries to rotate due to the inertia force even though the wire 5 is stopped. There was a problem that the wire 5 was disconnected.
[0007]
This inertia torque is also generated in the guide pulley 38 provided at the tip of the tension arm 37, and there is a problem that the restoring force of the tension arm 37 is added thereto, and the wire 5 is disconnected for the same reason.
[0008]
That is, in the conventional wire supply apparatus having the above-described configuration, when the wire 5 having a small wire diameter and low strength is used, there is a problem that the wire is disconnected. In particular, there has been no wire feeder that handles fine wires specifically in the prior art.
[0009]
Further, the conventional wire supply device having such a configuration has a problem in that the structure is complicated and the number of parts is large, resulting in an increase in cost and the size of the device.
[0010]
The present invention has been made to solve the above-described problems, eliminates various pulleys such as tension pulleys and guide pulleys that cause inertial torque, and is stable even in a fine wire with low strength. An object of the present invention is to provide a fine wire supply device that can be supplied and can be reduced in size and cost by reducing the number of components without using a tension spring or a tension pulley for applying tension.
[0011]
[Means for Solving the Problems]
  A fine wire supply device according to the present invention is a fine wire supply device that continuously supplies fine wires to a moving body that repeatedly accelerates and stops, and has a flexible rod-like shape and has a proximal end attached. An elastic rod that is fixed to the base and has a free end that flexes flexibly, a wire spool that is provided on the mounting base and wound with fine wires, and is connected to the wire spool to rotate and stop the wire spool. A motor for controlling the rotation and stop of the motor to feed out a fine wire;Multiple attached to the middle part of the elastic rod,Fine wire fed from wire spoolPassed through the fine wireFrom the base end of the elastic rod toward the tipA guide ring and a guide pipe that is curved at the tip of the elastic rod and through which a fine wire led to the tip of the elastic rod is passed to gently change the direction of the fine wireA guide member,Guide pipe tipThe fine wire is fed out from this and supplied to the moving body.
[0012]
The moving body further includes a timer that is mounted on an operating table that moves the moving body and that operates in conjunction with the operation of the operating table, and the control means rotates or stops the motor based on a signal of the timer. To control.
[0013]
In addition, an initial position return detection sensor that detects that the elastic rod has returned to the initial position is further included, and the control unit controls rotation / stop of the motor based on a detection signal of the initial position return detection sensor.
[0014]
The control means issues an alarm when the elastic rod does not return to the initial position within a predetermined time based on the signal of the timer and the signal of the initial position return detection sensor.
[0015]
Further, the mounting base supports the base end portion of the elastic rod so as to be swingable in the moving direction of the moving body.
[0016]
In addition, it further includes a no-load position return detection sensor that detects that the elastic rod has returned to the no-load position, and the control means performs processing when a disconnection occurs based on the detection signal of the no-load position return detection sensor. .
[0017]
Further, a wire holding mechanism for temporarily stopping the feeding of the fine wire is further provided between the wire spool and the elastic rod.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a side view showing Embodiment 1 of the fine wire supply apparatus of the present invention. In FIG. 1, 1 is a fine wire. The fine wire targeted in this embodiment has a wire diameter of φ16 [μm], a tensile strength of 0.18 [N] (stress conversion: 895 [N / mm]²]) Grade platinum wire. Reference numeral 2 denotes a workpiece which is a moving body to which the fine wire 1 is supplied. Reference numeral 3 denotes a rotating jig as an operation table on which the workpiece 2 is placed. A motor 4 rotates the rotating jig 3 intermittently with rapid acceleration / deceleration.
[0020]
Reference numeral 5 denotes a wire spool around which the fine wire 1 is wound. A motor 6 rotates the wire spool 5. 9 is a substantially rod-shaped elastic rod having flexibility. The material of the elastic rod 9 may be a metal such as spring steel, but if carbon is used, the effect of weight reduction is great, and the amount of deflection with respect to tension is large, which is very effective in controlling low tension. . Even if it is made of metal, it can be dealt with to some extent by reducing the shaft diameter.
[0021]
A plurality of guide rings 7 are attached to an intermediate portion of the elastic rod 9. Reference numeral 8 denotes a guide pipe that is attached to the distal end of the elastic rod 9 and that curves and extends further upward from the distal end. The guide ring 7 and the guide pipe 8 constitute a guide member that causes the fine wire 1 fed out from the wire spool 5 to run along the distal direction from the proximal end side of the elastic rod 9.
[0022]
The guide pipe 8 is made of a thin pipe having an inner diameter of 1 mm / an outer diameter of 2 mm in order to reduce the weight of the tip of the elastic rod 9. Further, the guide pipe 8 is curved with a predetermined curvature in order to curve the fine wire 1 at a gentle angle in the supply direction. As a material of the guide pipe 8, it is desirable to use a resin such as Teflon (registered trademark) in order to reduce the weight. Although it is possible to use a metal pipe, since a thin metal pipe is used, burrs and cracks of the pipe are likely to occur, and it is very difficult to process the vicinity of the pipe inlet and the outlet. In addition, there is a problem that the manufacturing cost is increased due to the time and effort required for processing. Reference numeral 10 denotes a mounting base to which the base end portion of the elastic rod 9 is fixed.
[0023]
Next, the operation will be described. The present embodiment is a fine wire supply device that continuously supplies a fine wire 1 to a workpiece 2 as a moving body that repeatedly accelerates and stops. In the present embodiment, the fine wire 1 is first welded to the workpiece 2 at a position A on the rotating jig 3 by welding means (not shown). Thereafter, the rotating jig 3 is rotated by the motor 4, and the workpiece 2 is moved from the position A to the position B and then stopped. At this time, the fine wire 1 is pulled rapidly, but it is necessary to follow the workpiece 2 without disconnection.
[0024]
When the work 2 moves from the position A to the position B along with the rotation of the rotating jig 3, the next new work 2 is newly supplied to the position A. Then, the fine wire 1 is welded to the work 2 this time, and thereafter the same operation as the work 2 is performed. This operation is continuously repeated while new workpieces 2 are sequentially supplied to the position A.
[0025]
Next, the initial setup of the fine wire 1 will be described. The initial setting of the fine wire 1 is performed manually by the operator. The operator pulls out the fine wire 1 from the wire spool 5, sequentially passes through the guide ring 7 and the guide pipe 8, pulls it out to the workpiece 2 side, and adheres to the workpiece 2. In this operation, when the fine wire 1 is passed through the guide pipe 8, an air suction tube is inserted into the outlet side hole of the guide pipe 8, and the fine wire 1 inserted into the inlet is air-suctioned by the air suction tube. It can be easily pulled out from the entrance to the exit.
[0026]
After the fine wire 1 is attached to the workpiece 2, the elastic rod 9 is at the no-load position C in FIG. 1 if no tension is applied to the fine wire 1. From this state, the operator rotates the wire spool 5 in the direction of arrow F in the figure and winds up the fine wire 1 by a predetermined amount. By this work, a predetermined tension is applied to the fine wire 1, and the elastic rod 9 is at the initial position D in FIG. Here, the initial position of the elastic rod 9 is a position where a predetermined tension required for the workpiece 2 is applied. This predetermined tension is necessary for the operation of welding the fine wire 1 to the workpiece 2 and is necessary for preventing the fine wire 1 from being loosened and entangled. The above is the initial setup work performed by the worker.
[0027]
Subsequently, a specific operation of the apparatus will be described. When the stopped work 2 is accelerated rapidly from the position A to the position B by the motor 4, the fine wire 1 is pulled along with this. At this time, the elastic rod 9 bends by the amount of movement of the workpiece 2, and the elastic rod 9 moves to the fall position E in FIG. The tension applied to the elastic rod 9 during this movement is an increase in the deflection of the elastic rod 9. If the tension at the fall position E is the maximum tension during the stroke and the wire has a strength higher than that, the wire will not be disconnected.
[0028]
When the workpiece 2 moves to the position B and stops, a control means (not shown) rotates the motor 6 for a predetermined time based on a timer signal (not shown). As a result, the wire spool 5 rotates in the direction of the arrow G for a certain time. And the fine wire 1 for the part which the workpiece | work 2 moved is newly supplied. With this operation, the elastic rod 9 returns to the initial position D.
[0029]
On the other hand, in the conventional example shown in FIG. 6, an inertia torque is generated around the support shaft 39 that supports the arm 37 when the work is accelerated rapidly, and the force generated by the movement of the work is instantaneously directly applied to the wire. Therefore, disconnection of the wire 5 may occur. Further, when the workpiece is suddenly stopped, the tip end of the arm 37 overshoots, and the wire 5 is pulled back, so that a large tension is applied to the wire 5. Further, in the conventional example, a guide pulley 38 for guiding the wire 5 is provided at the tip of the arm 37, the load at the tip of the arm 37 becomes heavy, the amount of overshoot further increases, and the wire 5 is disconnected. It's easy to do. On the other hand, in the present embodiment, the load on the entire elastic rod 9 can be reduced, and the tension pulley 36, the guide pulley 63, and the guide pulley 38, which are existing rotating bodies, are not provided. Therefore, even a fine wire with low strength can be stably supplied.
[0030]
In the prior art, a guide ring may be used instead of the guide pulley 38 in order to reduce the tip load. However, in this case, the wire supply direction changes greatly at the tip of the arm. That is, the wire is bent at an acute angle at the position of the guide ring. For this reason, the tension applied to the wire is concentrated at the position of the guide ring, causing disconnection. On the other hand, in the present embodiment, since the curved guide pipe 8 is provided at the tip of the elastic rod 9, the supply direction of the fine wire 1 can be gradually changed, and the fine wire 1 can be guided. By receiving on the wide surface of the pipe 8 in the length direction, there is an effect of preventing disconnection by preventing concentration of tension on the fine wire 1.
[0031]
As described above, in the present embodiment, since the tension applied to the fine wire 1 supplied to the workpiece that is repeatedly accelerated and stopped is absorbed by the elastic rod 9 and the guide pipe 8, the fine wire 1 is stably supplied. It becomes possible to do. Thereby, it is possible to suppress a reduction in the operation rate due to the disconnection and generation of defective products, and it is possible to increase productivity. Moreover, the main structure is simple with the motor 6, the elastic rod 9, and the guide pipe 8, and in production, it is easy to process like the carbon rod 9 and the Teflon (registered trademark) pipe 8, Since an inexpensive material can be adopted, it is possible to realize an inexpensive fine wire supply device as a whole.
[0032]
  As described above, the fine wire supply device of the present embodiment is a fine wire supply device that continuously supplies the fine wire 1 to the moving body 2 that repeatedly accelerates and stops, and has a substantially bar shape having flexibility. An elastic rod 9 having a proximal end fixed to the mounting base 10 and a free end to bend flexibly, and a wire spool 5 provided on the mounting base 10 and wound with a fine wire 1; A motor 6 connected to the wire spool 5 and rotating / stopping the wire spool 5, and control means (not shown) for feeding the fine wire 1 by controlling the rotation / stop of the motor 6;A plurality of elastic rods 9 are attached to the middle part,Fine wire 1 fed out from wire spool 5Is passed through the fine wire 1From the proximal end side of the elastic rod 9 toward the distal end portionA guide ring 7 and a guide pipe 8 that is curvedly provided at the tip of the elastic rod and through which the fine wire 1 led to the tip of the elastic rod 9 is passed to gently change the direction of the fine wire 1 are provided.A guide having guide members 7 and 8 and provided on the most distal end side of the elastic rod 9The tip of the pipe 8Then, the fine wire 1 is fed out and supplied to the moving body 2. For this reason, it is possible to stably supply even the fine wire 1 having a low strength by eliminating various pulleys such as a tension pulley and a guide pulley as a rotating body that cause an inertia torque. Thereby, it is possible to suppress a reduction in the operation rate due to the disconnection and generation of defective products, and it is possible to increase productivity. In addition, the number of parts can be reduced without using a tension spring or tension pulley for applying tension, and the size and cost can be reduced.In addition, the supply direction of the fine wire 1 can be changed gradually, and the fine wire 1 is received by a wide surface in the length direction of the guide pipe 8, thereby preventing tension concentration on the fine wire 1 and disconnection. Can be suppressed.
[0033]
Further, the moving body 2 is placed on a rotating jig 3 as an operating table for moving the moving body, and the fine wire supply device further includes a timer that operates in conjunction with the operation of the rotating jig 3, A control means (not shown) controls the rotation / stop of the motor 6 based on the signal of the timer. Therefore, a predetermined amount of fine wire 1 can be controlled using an inexpensive timer, the number of parts can be reduced, and a small size and low price can be achieved.
[0035]
Embodiment 2. FIG.
FIG. 2 is a side view showing Embodiment 2 of the fine wire supply apparatus of the present invention. In the first embodiment described above, regarding the supply of the fine wire 1, the control means determines the supply amount by rotating and stopping the motor 6 using the timer and rotating the wire spool 5 for a predetermined time. In the present embodiment, as shown in FIG. 2, a sensor 13 is newly provided to determine the supply amount of the fine wire 1.
[0036]
In FIG. 2, reference numeral 12 denotes a dog attached to the elastic rod 9. Reference numeral 13 denotes an initial position return detection sensor for detecting the dog 12. Reference numeral 14 denotes a plate to which the initial position return detection sensor 13 is attached. Reference numeral 15 denotes a base that supports the plate 14. The plate 14 is formed with an arc-shaped slot corresponding to the deflection position of the elastic rod 9 so that the position of the initial position return detection sensor 13 can be adjusted. The initial position return detection sensor 13 detects that the elastic rod 9 has returned to the initial position.
[0037]
Next, the operation will be described. In order to return the elastic rod 9 that has fallen to the fall position E by being pulled by the work 2 to the initial position D, the wire spool 5 is rotated in the direction of arrow G. The position of the dog 12 is detected by the initial position return detection sensor 13, and the motor 6, that is, the wire spool 5, is stopped using this detection signal. Thereby, since the position of the elastic rod 9 is directly confirmed, the initial position of the elastic rod 9 can be further stabilized. Further, since the amount of deflection of the elastic rod 9 is made constant, the tension of the fine wire 1 supplied to the work 2 can be supplied with a constant tension. Further, even when the fine wire 1 is caught by the guide pipe 8 or the like and stopped while the elastic rod 9 is returned to the initial position D, an alarm display can be performed by combining with the timer.
[0038]
In addition, when adjusting the tension | tensile_strength provided to the fine wire 1, the attachment position of the initial position return detection sensor 13 should be adjusted, and the initial position of the elastic rod 9 should just be changed.
[0039]
That is, in this embodiment, the initial position return detection sensor 13 and the dog 12 are added to the first embodiment. Thereby, since the tension | tensile_strength provided to the fine wire 1 can be made constant, the wire tension at the time of welding can be made constant, and it leads to stability of product quality.
[0040]
Thus, the fine wire supply device of the present embodiment further includes the initial position return detection sensor 13 that detects that the elastic rod 9 has returned to the initial position D, and the control means (not shown) Based on the detection signal of the detection sensor 13, rotation / stop of the motor 6 is controlled. Thereby, the tension applied to the fine wire 1 can be made constant, and the wire tension at the time of welding can be made constant, so that the quality of the product can be improved.
[0041]
The control means (not shown) issues an alarm when the elastic rod 9 does not return to the initial position within a predetermined time based on the timer signal and the initial position return detection sensor 13 signal. Therefore, a failure of the apparatus can be detected quickly, and the operating rate can be improved.
[0042]
Embodiment 3 FIG.
3 is a side view showing Embodiment 3 of the fine wire supply apparatus of the present invention. Since the mounting base 10 is not movable in the above-described second embodiment, the tension generated at the initial position D is adjusted by adjusting the mounting position (mounting angle) of the initial position return detection sensor 13, that is, the initial position D. This can be achieved by adjusting the reaction force generated when the elastic rod 9 is bent from the unloaded position C to the fall position D.
[0043]
In the present embodiment, as indicated by an arrow H in FIG. 3, the swing mechanism 11 is provided on the mounting base 10 so that the initial mounting angle of the elastic rod 9, that is, the initial position D can be varied. The swing mechanism 11 is swingable in the supply direction of the fine wire 1 with a shaft perpendicular to the paper surface of FIG. The base end portion of the elastic rod 9 is fixed to the swing mechanism 11. The swing mechanism 11 is fixed so as not to swing by tightening a clamp lever (not shown).
[0044]
By providing the swing mechanism 11, the tension applied to the fine wire 1 can be easily adjusted without changing the mounting position of the elastic rod 9. Thereby, since the position of the initial position return detection sensor 13 can be fixed, the height position of the outlet of the guide pipe 8 can also be stabilized as compared with the first embodiment.
[0045]
That is, if the elastic rod 9 is tilted to the arrow H side, the tension can be increased, and if the elastic rod 9 is tilted to the arrow I side, the tension can be decreased. In advance, the tension generated at the unloaded position C and the initial position D at that time. Is measured, it is possible to adjust the tension at the position of the no-load position C.
[0046]
Thus, in the present embodiment, the swing mechanism 11 is provided so that the attachment angle of the elastic rod 9 can be adjusted. As a result, the tension to be applied to the fine wire 1 can be adjusted. For example, the tension can be adjusted according to the required specifications of the product to reduce the tension in order to suppress disconnection. It becomes possible.
[0047]
Embodiment 4 FIG.
FIG. 4 is a side view showing Embodiment 4 of the fine wire supply apparatus of the present invention. In Embodiments 1 to 3 described above, there was no detection means when the fine wire 1 was disconnected. In the present embodiment, a new sensor 16 is provided as shown in FIG. 4 so that a disconnection can be detected without impairing the effects of the above-described embodiment.
[0048]
In FIG. 4, reference numeral 16 denotes an unloaded position return detection sensor for detecting the unloaded position C of the elastic rod 9. When the fine wire 1 is disconnected, the elastic rod 9 is disabled, and thus returns to the no-load position C in FIG. At this time, the no-load position return detection sensor 16 detects the return of the elastic rod 9 to the no-load position C, and a control means (not shown) performs processing when a disconnection occurs. The processing when this disconnection occurs is, for example, an alarm notification.
[0049]
As described above, the fine wire supply device according to the present embodiment further includes the no-load position return detection sensor 16 that detects that the elastic rod 9 has returned to the no-load position C. Based on the detection signal of the load position return detection sensor 16, a process when a disconnection occurs is performed. Therefore, the disconnection of the fine wire 1 can be detected immediately, and measures such as stopping the apparatus and displaying an alarm can be taken. As a result, it is possible to prevent the occurrence of defective workpieces in which wires are not welded and wasteful fine wires, thereby improving productivity.
[0050]
Embodiment 5 FIG.
FIG. 5 is a side view showing Embodiment 5 of the fine wire supply apparatus of the present invention. In the above-described first to fourth embodiments, when the fine wire 1 is pulled and the elastic rod 9 falls, the opposite end of the fine wire 1 needs to be held, and the rotation of the wire spool 5 is locked by stopping the motor 6. That was the wire holding function. In the present embodiment, as shown in FIG. 5, a special wire holding mechanism for holding the opposite end of the fine wire 1 is provided.
[0051]
In FIG. 5, 17 is a wire holding mechanism provided between the wire spool 5 and the elastic rod 9. Reference numeral 18 denotes a tension torque limiter installed to apply a certain tension to the fine wire 1.
[0052]
The operation will be described. First, when the workpiece 2 moves from the position A to the position B, the wire holding mechanism 17 holds the fine wire 1 and stops the feeding, and the elastic rod 9 falls down in the position E as in the above embodiment. To prevent the sudden load applied to the fine wire 1. Then, after the workpiece 2 moves and stops, the wire holding mechanism 17 is opened, and a new fine wire 1 is supplied from the wire spool 5.
[0053]
At this time, if the fine wire 1 between the wire holding mechanism 17 and the wire spool 5 is in a free state in which no tension is applied, a new fine wire 1 is rapidly supplied simultaneously with the opening of the wire holding mechanism 17. Then, since the elastic rod 9 returns to the no-load state, the fine wire 1 is broken, rubbed, etc., leading to the occurrence of disconnection.
[0054]
In the present embodiment, a tension torque limiter 18 is provided in addition to the wire holding mechanism 17 to apply a weak tension to the fine wire 1. Therefore, rapid movement of the elastic rod 9 can be prevented, and disconnection can be suppressed. Subsequently, when the elastic rod 9 returns to the initial position D, the wire holding mechanism 17 holds the fine wire 1 again by a signal from the initial position return detection sensor 13. By repeating this series of operations, the same effects as those of the first to fourth embodiments can be obtained.
[0055]
The tension torque limiter 18 does not determine the tension of the fine wire 1 supplied to the workpiece 2 but is intended to apply a weak tension to stabilize the supply of the fine wire 1. As a result, the attachment position and the attachment direction of the wire spool 5 are not limited, and the degree of freedom of installation of the apparatus is increased.
[0056]
This embodiment has a configuration in which the wire supply motor 6 is omitted and a wire holding mechanism 17 and a tension torque limiter are added instead of the above-described first to fourth embodiments. As a result, the attachment position and the attachment direction of the wire supply mechanism (the wire spool 5 and the motor 6) are not limited, so that the installation space of the wire supply mechanism according to the present embodiment, which increases the degree of installation freedom, is limited. Even in such a case, since the wire supply mechanism can be separately placed at a distant position, application in a wide range is possible.
[0057]
As described above, the fine wire supply device according to the present embodiment further includes the wire holding mechanism 17 between the wire spool 5 and the elastic rod 9 to temporarily stop the feeding of the fine wire 1. For this reason, the attachment position and the attachment direction of the wire supply mechanism such as the wire spool 5 and the motor 6 are not limited, and the degree of freedom of installation of the apparatus can be increased.
[0058]
【The invention's effect】
  A fine wire supply device according to the present invention is a fine wire supply device that continuously supplies fine wires to a moving body that repeatedly accelerates and stops, and has a flexible rod-like shape and has a proximal end attached. An elastic rod that is fixed to the base and has a free end that flexes flexibly, a wire spool that is provided on the mounting base and wound with fine wires, and is connected to the wire spool to rotate and stop the wire spool. A motor for controlling the rotation and stop of the motor to feed out a fine wire;Multiple attached to the middle part of the elastic rod,Fine wire fed from wire spoolPassed through the fine wireFrom the base end of the elastic rod toward the tipA guide ring and a guide pipe that is curved at the tip of the elastic rod and through which a fine wire led to the tip of the elastic rod is passed to gently change the direction of the fine wireA guide member,Guide pipe tipThe fine wire is fed out from this and supplied to the moving body. For this reason, various pulleys such as a tension pulley and a guide pulley serving as a rotating body that cause inertia torque can be eliminated, and even a fine wire with low strength can be stably supplied. Thereby, it is possible to suppress a reduction in the operation rate due to the disconnection and generation of defective products, and it is possible to increase productivity. In addition, the number of parts can be reduced without using a tension spring or tension pulley for applying tension, and the size and cost can be reduced.In addition, the supply direction of the fine wire 1 can be changed gradually, and the fine wire 1 is received by a wide surface in the length direction of the guide pipe 8, thereby preventing tension concentration on the fine wire 1 and disconnection. Can be suppressed.
[0059]
The moving body further includes a timer that is mounted on an operating table that moves the moving body and that operates in conjunction with the operation of the operating table, and the control means rotates or stops the motor based on a signal of the timer. To control. Therefore, a predetermined amount of fine wire can be fed out using an inexpensive timer, the number of parts can be reduced, and a small size and low price can be achieved.
[0060]
In addition, an initial position return detection sensor that detects that the elastic rod has returned to the initial position is further included, and the control unit controls rotation / stop of the motor based on a detection signal of the initial position return detection sensor. Thereby, the tension applied to the fine wire can be made constant, and the wire tension at the time of welding can be made constant, so that the quality of the product can be improved.
[0061]
The control means issues an alarm when the elastic rod does not return to the initial position within a predetermined time based on the signal of the timer and the signal of the initial position return detection sensor. Therefore, a failure of the apparatus can be detected quickly, and the operating rate can be improved.
[0062]
Further, the mounting base supports the base end portion of the elastic rod so as to be swingable in the moving direction of the moving body. Therefore, the tension applied to the fine wire can be easily adjusted.
[0063]
In addition, it further includes a no-load position return detection sensor that detects that the elastic rod has returned to the no-load position, and the control means performs processing when a disconnection occurs based on the detection signal of the no-load position return detection sensor. . Therefore, the disconnection of the fine wire can be detected immediately, and it is possible to take measures such as stopping the apparatus and displaying an alarm. As a result, it is possible to prevent the occurrence of defective workpieces in which wires are not welded and wasteful fine wires, thereby improving productivity.
[0064]
Further, a wire holding mechanism for temporarily stopping the feeding of the fine wire is further provided between the wire spool and the elastic rod. For this reason, the attachment position and the attachment direction of the wire supply mechanism such as the wire spool and the motor are not limited, and the degree of freedom of installation of the apparatus can be increased.
[Brief description of the drawings]
FIG. 1 is a side view showing Embodiment 1 of a fine wire supply device of the present invention.
FIG. 2 is a side view showing Embodiment 2 of the fine wire supply device of the present invention.
FIG. 3 is a side view showing Embodiment 3 of the fine wire supply device of the present invention.
FIG. 4 is a side view showing Embodiment 4 of the fine wire supply device of the present invention.
FIG. 5 is a side view showing Embodiment 5 of the fine wire supply device of the present invention.
FIG. 6 is a side view of a wire supply device provided with a conventional tension applying mechanism.
[Explanation of symbols]
1 fine wire, 2 workpiece, 3 jig, 4 motor, 5 wire spool, 6 motor, 7 guide ring (guide member), 8 guide pipe (guide member), 9 elastic rod, 10 mounting base, 11 swing mechanism , 12 dog, 13 initial position return detection sensor, 14 plate, 15 base, 16 no-load position return detection sensor, 17 wire holding mechanism, 18 tension torque limiter.

Claims (7)

A fine wire supply device that continuously supplies fine wires to a moving body that repeatedly accelerates and stops,
An elastic rod having a substantially rod shape having flexibility, a base end portion fixed to a mounting base, and a distal end portion being flexibly bent;
A wire spool provided on the mounting base and wound with the fine wire;
A motor coupled to the wire spool for rotating and stopping the wire spool;
Control means for controlling rotation / stop of the motor to feed out the fine wire;
Multiple attached to an intermediate portion of the elastic rods, the fine wire fed from the wire spool is passed, causing the the fine wire from the base end of the elastic rods along toward the distal direction A guide having a guide ring that is curved at the tip of the elastic rod and is guided at the tip of the elastic rod and through which the fine wire is passed to gently change the direction of the fine wire. A member and
A fine wire supply device, wherein the fine wire is fed from a tip of the guide pipe and supplied to the moving body. The moving body is placed on an operation table that moves the moving body,
It further has a timer that operates in conjunction with the operation of the operation table,
The fine wire supply device according to claim 1, wherein the control means controls rotation / stop of the motor based on a signal of the timer. An initial position return detection sensor for detecting that the elastic rod has returned to the initial position;
The fine wire supply apparatus according to claim 1, wherein the control unit controls rotation / stop of the motor based on a detection signal of the initial position return detection sensor. The control means issues an alarm when the elastic rod does not return to the initial position within a predetermined time based on the signal of the timer and the signal of the initial position return detection sensor. The fine wire supply device according to claim 3, which is dependent on item 2. The fine wire supply device according to any one of claims 1 to 4, wherein the mounting base supports a base end portion of the elastic rod so as to be swingable in a moving direction of the movable body. A non-load position return detection sensor that detects that the elastic rod has returned to the no-load position;
The fine wire supply device according to any one of claims 1 to 5, wherein the control means performs processing when a disconnection occurs based on a detection signal of the no-load position return detection sensor. The fine wire supply device according to any one of claims 1 to 6, further comprising a wire holding mechanism that temporarily stops feeding of the fine wire between the wire spool and the elastic rod. .

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