JP2019001617A - Tension device - Google Patents

Abstract

To stabilize the tension control by the tension device.SOLUTION: The tension device 100 includes a main drum 20 that feeds the wire rod 1 guided from the wire rod source 2, a tension bar 30 configured to be rotatable about the rotation pin 31 A and to which the wire rod 1 fed from the main drum 20 is locked, and a tension detector 70 for detecting the tension of the wire 1 between the wire rod source 2 and the main drum 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tension device used in a winding machine that winds a wire around a winding core.

  In Patent Document 1, a tension bar that can be rotated around a rotation fulcrum, a wire guide attached to the tension bar, and a tension bar at a predetermined position between the rotation fulcrum of the tension bar and the wire guide. A tension device is disclosed that includes a spring as an elastic member that exerts an elastic force according to a moving angle, and a feeding pulley that feeds the wire to a wire guide.

JP 2000-128433 A

  A winding machine is required to increase the winding speed of a wire from the viewpoint of cost reduction and high efficiency. In order to increase the speed of winding by a winding machine, stable tension control of the wire by a tension device is necessary.

  The present invention has been made in view of the above-described problems, and an object thereof is to stabilize the tension control of a wire by a tension device.

  The present invention is a tension device used in a winding machine that winds a wire around a winding core, and is configured to rotate around a rotating fulcrum and a main drum that feeds out the wire led from a wire source. It is characterized by comprising a tension bar to which the wire rod fed out from the drum is locked, and a tension detector for detecting the tension of the wire rod between the wire source and the main drum.

  In the present invention, the tension of the wire supplied from the wire source to the main drum of the tension device is detected by the tension detector. By using the detection result of the tension detector, the wire can be supplied from the wire source to the main drum with a stable tension, and the tension control of the wire by the tension device is stabilized.

It is a perspective view showing a tension device concerning an embodiment of the present invention. It is a block diagram showing a tension device concerning an embodiment of the present invention. It is an enlarged side view of the tension device concerning the embodiment of the present invention, and shows the state where the cover was removed. It is a block diagram which shows the tension | tensile_strength detection part of the tension apparatus which concerns on embodiment of this invention. It is a block diagram which shows the wire source which supplies a wire to the tension apparatus which concerns on embodiment of this invention. It is a perspective view which shows the tension apparatus which concerns on the modification of embodiment of this invention.

  Hereinafter, a tension device 100 according to an embodiment of the present invention will be described with reference to the drawings.

  The tension device 100 is used in a winding machine (not shown) that forms a coil by winding the wire 1 around a winding core (not shown). The tension device 100 controls the tension (tension) of the wire 1 wound around the core while feeding the wire 1 from the wire source 2 storing the wire 1 toward the core. Hereinafter, a specific configuration of the tension device 100 will be described.

  As shown in FIGS. 1 to 3, the tension device 100 includes a body 10, a main drum 20 that feeds the wire 1 attached to the body 10 and supplied from the wire source 2, and a drum motor 21 that rotationally drives the main drum 20. A tension bar 30 configured to be rotatable about a rotation pin 31A serving as a rotation fulcrum and to which the wire 1 is locked, an arm motor 25 that is rotationally driven by power supply, and an arm motor 25. A link mechanism 40 serving as a transmission mechanism for transmitting rotational torque to the tension bar 30 as torque around the rotation pin 31A.

  The main drum 20 is a pulley around which the wire 1 is wound around the outer periphery, and is provided on the front surface 10 </ b> A of the body 10. The main drum 20 is connected to a rotating shaft (not shown) of the drum motor 21 and rotates by driving the drum motor 21.

  The drum motor 21 is a servo motor whose rotating shaft is rotated by electric power supplied from a driver 21A (see FIG. 2).

  As shown in FIGS. 1 and 3, the tension bar 30 and the link mechanism 40 are attached to the side surface 10 </ b> B of the body 10 and are covered with a cover 11 having an open front. In addition, the cover 11 is formed with a notch 12 whose width increases toward the front. Through the opening of the cover 11 and the notch 12, replacement of the tension bar 30 and the link mechanism 40, maintenance work, and the like are performed.

  As shown in FIG. 3, the tension bar 30 includes a rod portion 31 that is a rod-like member having one end connected to the rotation pin 31 </ b> A, and a guide portion 32 that is provided at the other end of the rod portion 31 and to which the wire 1 is locked. And having. The rod portion 31 is attached to the side surface 10B of the body 10 so as to be rotatable by a rotation pin 31A. The other end of the rod portion 31 protrudes from the opening of the cover 11 toward the front.

  The guide portion 32 includes a holding portion 33 that is attached to the tip of the rod portion 31 and a roller portion 34 that is a pulley that is rotatably connected to the holding portion 33. The wire 1 is wound around the outer periphery of the roller portion 34, turned by the roller portion 34, and guided to the winding core.

  The arm motor 25 is a servo motor in which the rotating shaft 26 (see FIG. 3) is rotated by electric power supplied from the driver 25A (see FIG. 2), and an angular displacement or rotational torque corresponding to the supplied electric power is obtained. This is a so-called torque motor. In the present embodiment, the arm motor 25 generates a clockwise rotational torque as indicated by an arrow in FIG.

  As shown in FIG. 3, the link mechanism 40 is connected to the rotary shaft 26 of the arm motor 25 and rotates together with the rotary shaft 26. The link mechanism 40 is rotatably connected to the first link member 41 and rotates. A second link member 45 rotatably connected to the rod portion 31 of the tension bar 30 at a position spaced from the moving pin 31A.

  The first link member 41 includes a tip end portion 42 that is rotatably connected to the second link member 45, and a connecting portion 43 that is connected to the rotation shaft 26 of the arm motor 25. The first link member 41 rotates together with the rotating shaft 26 by connecting the connecting portion 43 to the rotating shaft 26 of the arm motor 25.

  The second link member 45 is rotatably connected to the rod portion 31 of the tension bar 30 via the attachment portion 35 at a predetermined position between the rotation pin 31A and the holding portion 33.

  Therefore, the clockwise rotational torque in FIG. 3 in the arm motor 25 is transmitted to the tension bar 30 through the first link member 41 and the second link member 45 as the clockwise torque about the rotation pin 31A. The

  Further, as shown in FIGS. 1 and 2, the tension device 100 includes a felt part 50 for removing dirt and the like of the wire 1, a potentiometer 55 as an angle detection part for detecting the rotation angle of the tension bar 30, and The controller 60, the display unit 65 provided on the front surface 10A of the body 10, and the wire 1 provided on the front surface 10A of the body 10 and guided from the wire source 2 to the main drum 20 (hereinafter also referred to as "input-side wire 1"). And a tension detecting unit 70 for detecting the tension.

  The felt unit 50 sandwiches the wire 1 supplied from the wire source 2 between a pair of felts, and removes dirt and the like attached to the wire 1 passing therethrough.

  The potentiometer 55 has a shaft portion (not shown) that is coaxially connected to the rotation pin 31 </ b> A and is accommodated inside the body 10. The rotation angle of the tension bar 30 detected by the potentiometer 55 is input to the controller 60. The angle detection unit is not limited to the potentiometer 55, and may be a configuration that can detect the rotation angle of the tension bar 30, for example, an encoder. In the present embodiment, as shown in FIG. 3, the angle on the acute angle side from the reference line extending in the left-right direction in FIG. 3 (broken line in FIG. 3) will be described as the rotation angle of the tension bar 30.

  The controller 60 is constituted by a microcomputer including a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and I / O interface (input / output interface). The RAM stores data in the processing of the CPU, the ROM stores a control program of the CPU in advance, and the I / O interface is used for input / output of information with the connected device. The controller 60 may be composed of a plurality of microcomputers. The controller 60 is programmed so as to be able to execute at least processing necessary for executing control according to the present embodiment and the modification. Note that the controller 60 may be configured as a single device, or may be divided into a plurality of devices so that each control in the present embodiment is distributedly processed by the plurality of devices.

  As shown in FIG. 2, the controller 60 controls the power supplied to the arm motor 25 and the drum motor 21, and receives the detection results of the control unit 61 and the tension detection unit 70 for controlling these operations. The wire 1 in the wire source 2 based on the detection result of the tension detection unit 70 and the determination unit 63 that determines whether the tension of the wire 1 detected by the unit 62 and the tension detection unit 70 is within a predetermined range. And an estimation unit 64 for estimating the remaining amount.

  The display unit 65 is, for example, a touch panel monitor. By operating the display unit 65 by the operator, the operating condition of the tension device can be set. Further, the tension value of the wire 1 detected by the tension detection unit 70 is displayed on the display unit 65.

  As shown in FIG. 4, the tension detector 70 includes a pair of auxiliary rollers 71 </ b> A and 71 </ b> B around which the wire 1 is hung, and a measuring roller provided between the pair of auxiliary rollers 71 </ b> A and 71 </ b> B around which the wire 1 is hung. 72 and a load cell 73 that contacts the measuring roller 72 from the side opposite to the wire 1 (upper side in FIG. 4). The wire 1 is wound around alternately in the order of one auxiliary roller 71A, the measuring roller 72, and the other auxiliary roller 71B.

  The load cell 73 comes into contact with the measurement roller 72 and measures the load that the measurement roller 72 receives from the wire 1. The measurement result of the load cell 73 is input to the controller 60.

  As shown in FIG. 1, the wire 1 supplied from the wire source 2 is guided by the guide 15 provided at the lower part of the front surface 10 </ b> A of the body 10 and guided to the felt part 50. The felt of the felt part 50 removes dirt, oil, and the like of the wire 1. The wire 1 that has passed through the felt part 50 is wound around the main drum 20 through a tension detector 70 provided on the front surface 10 </ b> A of the body 10.

  The wire 1 hung on the main drum 20 is hung on the roller portion 34 at the tip of the tension bar 30 through the turning roller 16 provided on the side surface 10B of the body 10. The wire 1 is turned by the roller portion 34 and guided to the winding core.

  The wire 1 is sent out from the tension device 100 to the core by the rotation of the main drum 20. Further, the rotational torque of the arm motor 25 is transmitted to the tension bar 30 by the link mechanism 40, and the rotational torque of the arm motor 25 is applied to the wire 1 through the tension bar 30. Thereby, the force according to the torque of the tension bar 30 around the rotation pin 31A is applied to the wire 1 as tension. In this manner, the wire 1 is sent out from the tension device 100 to the winding core under control of a predetermined tension.

  Next, the operation of the tension device 100 and the tension control method of the wire 1 will be described in detail.

  In the tension device 100, the control unit 61 of the controller 60 controls the arm motor 25 and the arm motor 25 so that the wire 1 in the winding does not break and falls within a predetermined tension range suitable for the winding according to the coil model number and the like. The drum motor 21 is controlled.

  The tension generated in the wire 1 during winding is a speed difference between the feeding speed of the wire 1 by the tension device 100 and the winding speed of the winding core of the winding machine (hereinafter also simply referred to as “speed difference of the wire 1”). The resultant force of the tension generated by the tension bar 30 and the tension applied from the tension bar 30. In the winding of the wire 1, the winding speed of the wire 1 is set so as to be equal to or greater than the feeding speed of the wire 1. That is, in this specification, the speed difference of the wire 1 means not only that there is a difference (winding speed> feeding speed) but also that the difference is zero (winding speed = feeding speed). .

  In the tension device 100, the operation of the arm motor 25 is controlled so that the generated rotational torque is constant in order to set the tension of the wire 1 within a predetermined range (hereinafter referred to as “tension target value”). (Constant torque control) and the tension of the wire rod 1 is controlled by controlling the operation of the drum motor 21 (feedback control) so that the rotation angle of the tension bar 30 is constant. This will be specifically described below.

  The controller 61 of the controller 60 controls the driver 25A of the arm motor 25 with constant torque so that the rotational torque generated by the arm motor 25 maintains a predetermined value (hereinafter referred to as “torque predetermined value”). A command is transmitted (see FIG. 2). The driver 25 </ b> A supplies electric power having a magnitude corresponding to the constant torque control command to the arm motor 25 to drive the arm motor 25. More specifically, the predetermined torque value is determined according to the coil model number or the like so as to realize a desired tension target value. The controller 60 stores in advance a map (or function) indicating a relationship between a predetermined torque value and a voltage (constant torque control command value to the driver 25A) supplied to the arm motor 25. The control unit 61 transmits a constant torque control command to the driver 25A based on the map, and the driver 25A supplies a voltage to the arm motor 25 according to the constant torque control command. Thus, the operation of the arm motor 25 is controlled so that the generated torque is kept constant at a predetermined torque value (so-called constant torque control).

  In a state where the arm motor 25 generates a constant rotational torque, the rotation angle of the tension bar 30 is determined according to the speed difference of the wire 1. That is, in a state where the rotational torque of the arm motor 25 is constant, the speed difference of the wire 1 is kept constant by controlling the rotation angle of the tension bar 30 to be constant. Therefore, the control unit 61 has a predetermined value (hereinafter referred to as “angle target value”) in which the rotation angle of the tension bar 30 is determined based on the rotation angle of the tension bar 30 detected by the potentiometer 55. As described above, the position control command or the speed control command is transmitted to the driver 21A to control the position or speed of the drum motor 21. Further, the control unit 61 feedback-controls the drum motor 21 based on the rotation angle of the tension bar 30 detected by the potentiometer 55 so that the rotation angle of the tension bar 30 is maintained at the angle target value. The target angle value is determined according to the coil model number and the like together with a predetermined torque value so as to realize a desired target tension value, and is stored in the controller 60 in advance.

  If the winding speed of the wire 1 changes due to an increase in the winding diameter or the like in the winding, the speed difference from the feeding speed of the wire 1 from the tension device 100 changes, and the tension of the wire 1 changes. Due to this change in tension, the tension bar 30 rotates about the rotation pin 31A, and the rotation angle increases or decreases as shown in FIG.

  When the rotation angle of the tension bar 30 changes, the control unit 61 controls the driving of the drum motor 21 to control the rotation speed of the main drum 20, that is, the feeding speed of the wire 1.

  Specifically, when the rotation angle of the tension bar 30 detected by the potentiometer 55 is larger than the angle target value, the drum motor 21 reduces the rotation speed and feeds the wire 1 from the main drum 20. The speed is controlled to decrease. Thereby, the speed difference of the wire 1 becomes large, the tension | tensile_strength of the wire 1 increases, and the tension bar 30 rotates so that a rotation angle may decrease. Therefore, the rotation angle of the tension bar 30 is adjusted again to the target angle value.

  On the contrary, when the rotation angle of the tension bar 30 is smaller than the target angle value, the drum motor 21 is controlled so as to increase the rotation speed and increase the feeding speed of the wire 1 from the main drum 20. The Thereby, the speed difference of the wire 1 becomes small, the tension | tensile_strength of the wire 1 falls, and the tension bar 30 rotates so that a rotation angle may increase. Therefore, the rotation angle of the tension bar 30 is adjusted again to the target angle value.

  As described above, the speed of the wire 1 in the winding is controlled by controlling the drum motor 21 so as to keep the rotation angle of the tension bar 30 constant while controlling the rotational torque generated by the arm motor 25 to be constant. Even when the difference is changed, the tension of the wire 1 is controlled so as to be kept constant at the tension target value. The target tension value, the predetermined torque value, and the target angle value are appropriately set according to the coil model number so that the wire 1 does not break and has a tension within a range suitable for winding. Further, the tension target value, the torque predetermined value, and the angle target value are not limited to a single value, but may be set as a predetermined range (a range of values having a predetermined width).

  Next, the operation of the tension detector 70 will be described.

  A load corresponding to the tension of the passing wire 1 acts on the measurement roller 72 of the tension detector 70. The load acting on the measuring roller 72 is detected by the load cell 73. The detection result of the load cell 73 is input to the calculation unit 62 of the controller 60 (see FIG. 2).

  The calculation unit 62 calculates the tension of the wire 1 based on the load detected by the load cell 73. Specifically, the correspondence relationship between the load detected by the load cell 73 and the tension of the wire 1 is measured in advance, and the tension of the wire 1 is calculated from the load detected based on this correspondence.

  The tension calculated by the calculation unit 62 is input to the display unit 65, the determination unit 63 of the controller 60, and the estimation unit 64. The display unit 65 displays the tension of the wire 1 detected by the tension detection unit 70.

  The determination unit 63 of the controller 60 determines whether the tension of the wire 1 is within a predetermined threshold range. The threshold value is defined as a numerical range having a predetermined width so as to be the tension of the wire 1 suitable for winding, and is stored in the controller 60. When it is determined that the detected tension is outside the threshold range, an alarm signal is transmitted from the determination unit 63 to the notification unit 66.

  The alerting | reporting part 66 is an alarm device which emits the alert sound which alert | reports that the tension | tensile_strength of the wire 1 is abnormal, if an alert signal is received. In addition, you may alert | report abnormality of tension | tensile_strength not only by an alarm sound but by the display in the display part 65. FIG. In this case, the display unit 65 functions as the notification unit 66.

  Here, when the rotational speed of the main drum 20 is relatively high, the wire 1 guided from the wire source 2 to the main drum 20 may be bent by centrifugal force. Thereby, the wire 1 cannot be sent out appropriately by the main drum 20, and the tension of the wire 1 guided from the main drum 20 to the tension bar 30 may change unintentionally.

  As shown in FIG. 5, the wire source 2 has a shape having a cylindrical main body 3 around which the wire 1 is wound and flanges 4 provided at both ends of the main body 3. In the case of such a wire source 2, the wire 1 wound around the main body portion 3 comes into contact with the flange portion 4 due to a decrease in the remaining amount of the wire 1 in the wire source 2 and is rubbed against the flange portion 4. It may be guided to the drum 20. In this case, since the resistance of the wire 1 supplied from the wire source 2 increases, the tension of the wire 1 guided to the main drum 20 may increase unintentionally.

  Thus, in the tension device 100, the tension of the wire 1 guided from the wire source 2 to the main drum 20 may change unintentionally. Unintentional changes in the tension of the wire 1 affect the controllability such as the accuracy and stability of the tension control of the wire 1 in the tension device 100. Therefore, by measuring the tension of the wire 1 (hereinafter referred to as “input-side wire 1”) guided from the wire source 2 to the main drum 20 by the tension detector 70, the abnormality in the tension of the input-side wire 1 ( Unintended tension change) can be detected, and the controllability of tension control can be improved.

  Specifically, when an abnormality in the tension of the wire 1 on the input side is detected, the abnormality is notified by the notification unit 66. When the input side wire 1 is deflected by the rotation of the main drum 20 and an unintended change in the tension of the input side wire 1 is detected, for example, the control condition of the tension device 100 is reset (changed). . Thereby, the wire 1 can be sent out to the winding machine with a desired tension without causing deflection.

  When an unintentional increase in the tension of the input-side wire 1 due to a decrease in the remaining amount of the wire 1 in the wire source 2 is detected, for example, the wire source 2 is replaced. Thereby, the wire 1 can be sent to the winding machine with a desired tension without causing an unintended increase in tension.

  Further, the estimation unit 64 of the controller 60 estimates the remaining amount of the wire 1 in the wire source 2 based on the detection result of the tension detection unit 70.

  More specifically, as described above, when the remaining amount of the wire 1 in the wire source 2 decreases, the wire 1 comes into contact with the flange portion 4 of the wire source 2, so that the resistance to pull out the wire 1 from the wire source 2 is large. Become. As the remaining amount of the wire 1 of the wire source 2 decreases and the winding diameter of the wire 1 wound around the main body 3 decreases, the resistance to pull out the wire 1 also increases, and accordingly, the tension of the input side wire 1 also increases. . Therefore, the estimation unit 64 estimates the remaining amount of the wire 1 from the detection result of the tension detection unit 70 based on the relationship between the remaining amount of the wire 1 and the tension of the input side wire 1. The relationship between the remaining amount of the wire 1 and the tension of the input side wire 1 is stored in the controller 60 in advance. When the remaining amount of the wire 1 estimated by the estimation unit 64 falls below a predetermined amount, an alarm sound (or in the display unit 65) notifying that the wire source 2 needs to be replaced separately from an abnormality alarm of the wire 1 Display). Thereby, the remaining amount of the wire 1 in the wire source 2 can be grasped without using a measuring instrument for measuring the remaining amount of the wire 1 in the wire source 2.

  Next, a modification of this embodiment will be described. The following modified examples are also within the scope of the present invention, and the configuration shown in the modified example and the configuration described in the above embodiment can be combined, or the following modified examples can be combined.

  In the above embodiment, the rotation angle of the tension bar 30 is detected by the potentiometer 55, and the drum motor 21 is controlled so that the rotation angle of the tension bar 30 becomes the angle target value. On the other hand, as shown in FIG. 6, the tension device 100 includes an output side tension detection unit 70 </ b> A that detects the tension of the wire rod 1 fed out from the main drum 20 instead of the potentiometer 55 or separately from the potentiometer 55. You may have. For example, as shown in FIG. 6, the output-side tension detection unit 70 </ b> A is provided on the side surface 10 </ b> B of the body 10, has the same configuration as the tension detection unit 70, and measures the tension of the wire 1. In such a case, by controlling the arm motor 25 and the drum motor 21 (for example, feedback control, etc.) so that the tension of the wire 1 becomes a desired value based on the detection result of the output side tension detector 70A. Thus, the tension of the wire 1 can be set to a desired value more reliably. For example, the controller 61 of the controller 60 generates a rotational torque in which the tension of the wire 1 becomes a desired tension value based on the detection result of the output side tension detector 70A, in other words, the rotation angle of the tension bar 30. The arm motor 25 may be feedback controlled so that is constant. Further, the detection result of the output side tension detection unit 70A may be displayed on the display unit 65.

  Further, the tension detection unit 70 and the output side tension detection unit 70A are not limited to the above-described configurations, and any configuration can be used as long as the tension of the wire 1 can be measured.

  Moreover, in the said embodiment, the arm motor 25 and the drum motor 21 are servomotors, respectively. In order to control the tension of the wire 1 with high accuracy, a servo motor is desirable. However, the arm motor 25 and the drum motor 21 may be pulse motors.

  In the above embodiment, the transmission mechanism that transmits the rotational torque of the arm motor 25 to the tension bar 30 is the link mechanism 40 having the first link member 41 and the second link member 45. Not only this but the link mechanism 40 may have a single link member, and may have three or more link members. The transmission mechanism may not be the link mechanism 40 as long as the arm motor 25 rotates to rotate the tension bar 30 around the rotation pin 31A. For example, the transmission mechanism may be a gear mechanism that transmits the rotation of the arm motor 25 as the rotation of the rotation pin 31A or a belt mechanism. Further, the rotation shaft 26 of the arm motor 25 and the rotation pin 31A may be coaxially connected. In this case, the coupling that connects the rotation shaft 26 of the arm motor 25 and the rotation pin 31A corresponds to the transmission mechanism.

  In the above-described embodiment, the tension bar 30 is transmitted with the driving force of the arm motor 25 via the link mechanism 40. On the other hand, the tension device 100 is configured to support the tension bar 30 by a support spring having one end connected to the tension bar 30 and the other end connected to the body 10 instead of the link mechanism 40 and the arm motor 25. You may have.

  In the above embodiment, the holding portion 33 at the tip of the tension bar 30 has the roller portion 34 that is a pulley around which the wire 1 is wound. On the other hand, the holding part 33 may have a nozzle having a guide hole through which the wire 1 is inserted and guides the wire 1 instead of the roller part 34.

  According to the above embodiment, there exist the effects shown below.

  In the tension device 100, the tension of the wire 1 guided from the wire source 2 to the main drum 20 is detected by the tension detector 70. Thereby, since abnormality of the tension | tensile_strength of the wire 1 can be detected, the wire 1 can be sent out appropriately by the main drum 20, and the controllability of tension control can be improved.

  In the tension device 100, the remaining amount of the wire 1 in the wire source 2 is estimated based on the detection result of the tension detector 70. Thereby, the replacement timing of the wire source 2 can be grasped without providing a measuring instrument for measuring the remaining amount of the wire source 2.

  Hereinafter, the configuration, operation, and effect of the embodiment of the present invention will be described together.

  The tension device 100 is configured to be rotatable about a main drum 20 that feeds the wire 1 guided from the wire source 2 and a rotation pin 31A, and a tension bar on which the wire 1 fed from the main drum 20 is locked. 30 and a tension detector 70 that detects the tension of the wire 1 between the wire source 2 and the main drum 20.

  The tension device 100 further includes a controller 60 to which the detection result of the tension detector 70 is input.

  Further, the tension device 100 further includes a notifying unit 66 for notifying the abnormality of the tension of the wire 1 based on the detection result of the tension detecting unit 70, and the controller 60 is within a range in which the detection result of the tension detecting unit 70 is predetermined. The notifying unit 66 has a determination that the tension is abnormal when the determining unit 63 determines that the detection result of the tension detecting unit 70 is outside a predetermined range. An alarm is issued to notify that.

  According to these configurations, the tension detector 70 detects the tension of the wire 1 supplied from the wire source 2 to the main drum 20. By using the detection result of the tension detector 70, the wire 1 can be supplied from the wire source 2 to the main drum 20 with a stable tension, and the tension control of the wire 1 by the tension device 100 is stabilized.

  The tension device 100 further includes an output-side tension detector 70A that detects the tension of the wire 1 between the main drum 20 and the tension bar 30, and a drum motor 21 that rotates the main drum 20, and includes a controller 60. Controls the drum motor 21 based on the detection result of the output-side tension detector 70A so that the rotation angle of the tension bar 30 is constant.

  According to this configuration, the tension of the wire 1 guided to the winding machine is controlled by controlling the drum motor 21 so that the tension of the wire 1 becomes a desired value based on the detection result of the output side tension detector 70A. Can be more reliably set to a desired value.

  In the tension device 100, the controller 60 further includes an estimation unit 64 that estimates the remaining amount of the wire 1 in the wire source 2 based on the detection result of the tension detection unit 70.

  In this configuration, the remaining amount of the wire 1 can be grasped without providing a measuring instrument for measuring the remaining amount of the wire 1 in the wire source 2.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

DESCRIPTION OF SYMBOLS 1 Wire rod 2 Wire rod source 20 Main drum 21 Drum motor 30 Tension bar 31A Rotation pin (rotation fulcrum)
60 controller 62 calculation unit 63 determination unit 64 estimation unit 66 notification unit 70 tension detection unit 70A output side tension detection unit 100 tension device

Claims (5)

A tension device used in a winding machine for winding a wire around a winding core,
A main drum for feeding out the wire led from a wire source;
A tension bar configured to be rotatable around a rotation fulcrum and to which the wire rod fed from the main drum is locked;
A tension detector that detects the tension of the wire between the wire source and the main drum,
A tension device characterized by that.   The tension device according to claim 1, further comprising a controller to which a detection result of the tension detection unit is input. Based on the detection result of the tension detection unit, further comprising a notification unit for notifying the abnormality of the tension of the wire rod,
The controller includes a determination unit that determines whether the detection result of the tension detection unit is within a predetermined range;
The notification unit issues an alarm to notify that the tension is abnormal when the determination unit determines that the detection result of the tension detection unit is outside a predetermined range.
The tension device according to claim 2. An output side tension detector for detecting the tension of the wire rod between the main drum and the tension bar;
A drum motor for rotating the main drum,
The said controller controls the said drum motor so that the rotation angle of the said tension bar becomes fixed based on the detection result of the said output side tension | tensile_strength detection part. Tension device. The controller further includes an estimation unit that estimates a remaining amount of the wire in the wire source based on a detection result of the tension detection unit.
The tension device according to any one of claims 2 to 4, wherein

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