JP2020063836A - Tensioner device of wrapping transmission mechanism - Google Patents

Abstract

To provide a tensioner device of a wrapping transmission mechanism capable of always adding a constant tension to a loosening side of a wire or a belt even if a driving pulley rotates in two of normal and reverse directions, and capable of carrying out drive transmission with high accuracy.SOLUTION: A tensioner device 5 of a wrapping transmission mechanism 1 includes: a driving pulley 2 and a driven pulley 3; a wrapping transmission element 4 wrapped between the driving pulley and the driven pulley; a first tension roller 10 positioned at either one of a tensioning side part and a loosening side part of the wrapping transmission element; and a second tension roller 11 positioned at the other. The first tension roller and the second tension roller are respectively and rotatably journaled at a supporting member 9 rockably supported in a driving shaft of the driving pulley through a torque limiter.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tensioner device that applies tension to a wire or belt that is a winding transmission element in a winding transmission mechanism that uses a flexible winding transmission element such as a wire or a belt.

  Conventionally, a winding transmission mechanism using a wire or a belt has been used as a drive transmission means for transmitting the rotation of an output shaft of a motor or the like to another shaft or transmitting the rotation transmitted to another shaft to another shaft. There is. This winding transmission mechanism includes a drive pulley, a driven pulley, a winding transmission element such as a wire or a belt wound between these pulleys, and an appropriate tension applied to the winding transmission element to obtain a desired transmission. A configuration provided with a tensioner device for obtaining efficiency is known.

  FIG. 7 shows the most general schematic configuration of a conventional tensioner device for a winding transmission mechanism. In the winding transmission mechanism 101 in FIG. 7, a belt 104 is stretched between a drive pulley 102 and a driven pulley 103 which are arranged to face each other. The drive pulley 102 is rotationally driven in the direction of arrow A, and the power of the drive pulley 102 is transmitted to the driven pulley 103 via the belt 104. The tensioner device 105 applies tension to a slack side portion of the belt 104, and includes a support member 107 rotatably provided via a support shaft 106, and a tension roller 108 rotatably supported by the support member 107. And a tension spring 109 that urges the support member 107 to press the tension roller 108 against the slack side portion of the belt 104. As a result, the belt 104 is applied with a predetermined tension and can be maintained in a state of being stretched over the entire circumference, so that smooth power transmission can be performed. There is also a configuration in which the support member 107 is fixed at an appropriate position without using the tension spring 109 and the tension roller 108 presses the slack side portion of the belt 104.

  In the tensioner device 105, when the drive pulley 102 is rotated in the forward and reverse directions to transmit power, the slack side and the tension side of the belt 104 change. For example, in FIG. 7, when the drive pulley 102 is rotated in the direction opposite to the arrow A direction, the right side portion of the belt 104 between the pulleys 102 and 103 is on the slack side, and the tensioner device 105 is on the tension side of the belt 104. Tension will be added. In this case, an excessive load is applied to the tension side of the belt 104, and slack is generated on the slack side, which hinders smooth power transmission.

  In Patent Document 1, as shown in FIG. 8, even if the drive pulley 61 rotates in two forward and backward directions, a pair that swings from both sides of the belt 63 so that tension can always be applied to the slack side of the belt 63. The tensioner device in which the idler pulleys 65A and 65B are sandwiched between the spring members 66 is disclosed.

JP-A-6-94091

  In the optical interference thin film laminate and the light absorbing thin film laminate formed on the substrate, by stacking one of the laminates so as to cover a region including the end face of the other laminate, the optical interference thin film laminate and the optical thin film laminate are formed. Water vapor can be prevented from entering the space between the absorbent thin film laminate and the adhesion strength can be maintained. Further, since the encapsulating laminate has an adhesive interface with the substrate as well as the encapsulating laminate, the adhesion strength is increased.

  The present invention has been made to solve the above problems, and it is possible to always apply a constant tension to the slack side of the belt even if the drive pulley rotates in two directions, high accuracy. It is an object of the present invention to provide a tensioner device for a winding transmission mechanism that can perform various drive transmissions.

  A tensioner device for a winding transmission mechanism of the present invention is a drive pulley and a driven pulley, a winding transmission element wound between the drive pulley and the driven pulley, a tension side portion of the winding transmission element, and A tensioner device for a winding transmission mechanism, comprising a first tension roller located on either one of the slack side parts and a second tension roller located on the other side, wherein the first tension roller and the second tension roller Is rotatably supported by a supporting member swingably supported on the drive shaft of the drive pulley via a torque limiter.

  According to the present invention, regardless of the rotation direction of the drive pulley, with the rotation of the drive pulley, one of the first tension roller and the second tension roller is always in contact with the slack side of the winding transmission element, Since a constant tension can be stably applied, it is possible to prevent a decrease in drive transmission force and an increase in drive resistance, and perform highly accurate drive transmission.

1 is a schematic configuration diagram of a tensioner device according to a first embodiment of the present invention. Sectional drawing which shows the schematic structure of the tensioner apparatus which concerns on Example 1 of this invention. Second Embodiment A schematic configuration diagram of a tensioner device according to a second embodiment of the present invention. Sectional drawing which shows the schematic structure of the tensioner apparatus which concerns on Example 2 of this invention. Sectional drawing which shows the schematic structure of the tensioner apparatus which concerns on Example 3 of this invention. The figure which shows the schematic structure of the tensioner apparatus which concerns on Example 4 of this invention. Schematic configuration diagram of a conventional tensioner device Schematic configuration diagram of a conventional tensioner device capable of rotating in both forward and reverse directions

(Example 1)
The present embodiment will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing an operation principle of a tensioner device of a winding transmission mechanism according to the present invention.

  In FIG. 1, a winding transmission mechanism 1 includes a drive pulley 2 and a driven pulley 3, a belt 4 wound between the drive pulley 2 and the driven pulley 3, and a tensioner device for adjusting the tension of the belt 4. 5 and.

  FIG. 2 is a cross-sectional view showing a schematic configuration of the drive pulley 2 and the tensioner device 5.

  1 and 2, the drive pulley 2 is connected and fixed to the rotary drive shaft 7 of the drive motor 6. The tensioner device 5 is rotatably supported by a support member 9 pivotally supported by a rotary drive shaft 7 of a drive motor 6 via a torque limiter 8 and by a symmetrical arrangement on the support member 9. The first contact roller 13, the second contact roller 11, and the first contact member 13 fixed to the mounting plate 12 of the drive motor 6 for restricting the swing position of the support member 9 and the second contact member 14 are provided. I have it.

  In FIG. 1A, when the drive motor 6 rotates the drive pulley 2 in the direction of arrow A1 (clockwise), the support member 9 swings in the direction of arrow A2 (clockwise) via the torque limiter 8. When the support member 9 swings and one of the contact portions of the support member 9 contacts the first contact member 13, the torque limiter 8 idles, and the support member 9 stops at this position. As a result, the first tension roller 10 comes into contact with the back surface of the slack side portion of the belt 4, whereby a constant tension is applied to the belt 4.

  Next, in FIG. 1B, when the drive motor 6 rotates in the reverse direction and the drive pulley 2 rotates in the direction of arrow B1 (counterclockwise), the support member 9 moves in the direction of arrow B2 (counterclockwise) via the torque limiter 8. When the other contact portion of the support member 9 contacts the second contact member 14, the torque limiter 8 idles, and the support member 9 stops at this position. As a result, a constant tension is applied to the belt 4 by the second tension roller 11 coming into contact with the back surface of the slack side portion of the belt 4. Further, in this state, the first tension roller 10 is completely separated from the tension side portion of the belt 4, so that the belt 4 is not excessively loaded. Further, even when the driving of the drive motor 6 is stopped, the support member 9 can maintain its position by the torque limiter 8, so that the belt tension is maintained.

  By adjusting the fixing positions of the first contact member 13 and the second contact member 14 and changing the swinging position of the support member 9, the contact amount of the tension rollers 10 and 11 with respect to the belt 4 is changed to change the belt. It is possible to freely adjust the value of the tension applied to No. 4.

  Further, by changing the setting of the operating torque value of the torque limiter 8 connected to the support member 9 without providing the first contact member 13 and the second contact member 14, the value of the tension applied to the belt 4 can be changed. You may adjust.

  Further, in this embodiment, the support member 9 is arranged directly on the rotary drive shaft 7 of the drive motor 6 via the drive pulley 2 and the torque limiter 8. However, the drive force from the drive motor is applied to the gear or the like. The drive transmission means may be used to transmit to the drive pulley or the support member.

  Further, the winding transmission mechanism 1 is not limited to the belt 4, and may be a winding transmission element such as a wire, rope or chain.

(Example 2)
The present embodiment will be described below with reference to the drawings.

  FIG. 3 is a schematic configuration diagram of a tensioner device of a winding transmission mechanism according to a second embodiment of the present invention. FIG. 4 is a sectional view showing a schematic configuration of the drive pulley and the tensioner device.

  The same components as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and only the differences will be described.

  In the first embodiment, when the rotation direction of the drive pulley 2 is switched, a certain time is required until the support member 9 swings and a predetermined tension is applied to the slack side portion of the belt 4. Become. Therefore, there is no problem in continuously transmitting the drive from the drive pulley 2 to the driven pulley 3, but the rotation direction of the drive pulley 2 is frequently switched or a minute amount of rotation is transmitted from the drive pulley 2 to the driven pulley 3. When doing, it is not preferable.

  Therefore, in this embodiment, even in such a drive transmission, a stable tension is applied to the belt so that the drive transmission can be performed with high accuracy.

  In FIGS. 3 and 4, the drive pulley 2 is rotatably supported on the rotary drive shaft 7 of the drive motor 6 via a pair of bearings 15. A pulley drive plate 16 is coaxially connected to the drive pulley 2 and is fixedly connected to the rotary drive shaft 7 of the drive motor 6. The pulley drive plate 16 is formed with an arcuate hole groove 16a concentric with the rotary drive shaft 7. The arcuate hole groove 16a has a projection pin 2a fixed to a side surface portion of the drive pulley 2 and a drive pulley 2 It is mounted so that it can rotate in the circumferential direction.

  In the above configuration, when the drive motor 6 rotates in the direction of arrow B from the state where the support member 9 and the first contact member 13 are in contact with each other as shown in FIG. 3A, as in the first embodiment, The support member 9 swings in the direction of arrow B via the torque limiter 8, and the other contact portion of the support member 9 contacts the second contact member 14. As a result, the first tension roller 10 separates from the tension side portion of the belt 4, and the second tension roller 11 contacts the slack side portion of the belt 4. During this time, the pulley drive plate 16 also rotates in the direction of arrow B as shown in FIG. 3B, but the circular arc groove 16a formed in the pulley drive plate 16 and the protruding pin 2a of the drive pulley 2 do not engage with each other. , The drive pulley 2 is not driven. The pulley drive plate 16 further rotates, and as shown in FIG. 3 (c), the protrusion pin 2 a of the drive pulley 2 comes into contact with the end of the circular arc groove 16 a of the pulley drive plate 16. As a unit, the drive pulley 2 is rotationally driven in the direction of arrow B. In this state, the second tension roller 11 is already in contact with the slack side portion of the belt 4 and a predetermined tension is applied, so that the rotation of the drive pulley 2 is accurately transmitted to the driven pulley 3 without fluctuation of the tension. be able to.

  When the rotation direction of the drive motor 6 is switched, the slack side portion and the tension side portion of the belt 4 are switched, so that only the rotation direction of each component changes in the same manner as the above operation.

  In the present embodiment, the same rotational driving force by the drive shaft 7 of the drive motor 6 can delay the rotational movement of the drive pulley 2 more than the swinging movement of the support member 9. Therefore, when switching the rotational direction, Sufficient tension acts on the slack side portion of the belt 4, and drive transmission can be performed in a stable state.

(Example 3)
The same components as those in the first and second embodiments are designated by the same reference numerals, the description thereof will be omitted, and only the differences will be described.

In the second embodiment, when the support member 9 swings when the rotation direction of the drive motor 6 is switched, the drive pulley 2 idles. Therefore, when the tension acting on the belt 4 is strong, the drive pulley 2 and the driven pulley are driven. 3 is pulled by the belt 4 and rotates together.
Therefore, in this embodiment, the drive pulley 2 is prevented from being rotated together in such a case.

  FIG. 5 is a schematic sectional view of a tensioner device of a winding transmission mechanism according to a third embodiment of the present invention. In FIG. 5, the drive pulley 2 is integrally formed with a gear 2b coaxially with the pulley outer peripheral portion, and the gear 2b meshes with an adjacent gear 17. A torque limiter 18 is coaxially connected and fixed to the gear 17, and the torque limiter 18 is pivotally fixed to a shaft 19 fixed to the mounting plate 12. As a result, a predetermined torque is generated by the torque limiter 18 in the rotation of the gear 17, so that even when the tension due to the contact of the tension roller acts on the belt 4 when the support member 9 swings, the drive pulley 2 moves. It is possible to prevent rotation. Further, when the drive pulley 2 is rotationally driven by the pulley drive plate 16, the torque value is set so that the torque limiter 18 idles regardless of the rotation direction.

(Example 4)
The same components as in the first, second, and third embodiments are designated by the same reference numerals, the description thereof will be omitted, and only the differences will be described.

  6A and 6B are a schematic configuration diagram and a sectional view, respectively, of a tensioner device for a winding transmission mechanism according to a fourth embodiment of the present invention. In FIG. 6, the drive pulley 2 is rotatably supported by the rotary drive shaft 7 of the drive motor 6 via a pair of bearings 15. A worm wheel (helical gear) 2b is integrally formed coaxially with the outer periphery of the drive pulley 2. A worm gear 21 connected to the drive shaft of the drive motor 20 is arranged at a position where it meshes with the worm wheel 2b. The drive pulley 2 is rotationally driven by the drive motor 20 via the speed reduction mechanism using the worm gear. As in the first to third embodiments, the tensioner device 5 has a support member 9 pivotally supported by a rotary drive shaft 7 of a drive motor 6 via a torque limiter 8 and a support member 9 symmetrical on the support member 9. A first contact member that is arranged and fixed to a first tension roller 10 that is rotatably supported, a second tension roller 11, and a mounting plate 12 of the drive motor 6, and that regulates the swing position of the support member 9. 13 and a second contact member 14.

  In this embodiment, a drive motor 20 for driving the drive pulley 2 is provided separately from the drive motor 6 for performing the swinging motion of the support member 9, so that the rotational movement of the drive pulley 2 is supported by the support member 9. It can be delayed more easily than the swinging motion of. For example, when the rotation of the drive pulley 2 is switched, the drive timing of the drive motor 20 is delayed from the drive motor 6 by a predetermined time, or detection means for detecting the swing position of the support member 9 is provided, and the drive is performed based on the detection signal. The motor 20 may be controlled.

  Furthermore, since the drive pulley 2 is driven via the worm gear, the worm gear self-locks on the drive pulley 2. As a result, when the support member 9 swings while the drive pulley 2 is stopped and the tension rollers 10 and 11 come into contact with the belt 4, it is possible to prevent the drive pulley 2 from rotating along with the belt tension.

  As described above, in this embodiment, since the drive motors for swinging the support member 9 and rotationally driving the drive pulley 2 are independently provided, the drive load is reduced, and each drive motor is downsized and reduced. It is possible to reduce the cost.

1 Wrapping Transmission Mechanism 2 Drive Pulley 3 Driven Pulley 4 Belt 5 Tensioner Device 6, 20 Drive Motor 8, 18 Torque Limiter 9 Support Member 10, 11 Tension Roller 13, 14 Contact Member 16 Pulley Drive Plate 21 Worm Gear

Claims (5)

A driving pulley and a driven pulley, a winding transmission element wound between the driving pulley and the driven pulley, and a tension side portion or a slack side portion of the winding transmission element, In a tensioner device of a winding transmission mechanism including one tension roller and a second tension roller located on the other side,
The first tension roller and the second tension roller are rotatably supported by a support member that is swingably supported on a drive shaft of the drive pulley via a torque limiter. A tensioner device for a winding transmission mechanism.   The first tension roller and the second tension roller are arranged at positions equidistant from the drive shaft of the drive pulley, and one of the first tension roller and the second tension roller is a slack side portion of the winding transmission element due to the swing of the support member. The tensioner device for the winding transmission mechanism according to claim 1, wherein the tensioner device is in contact with the other side and is separated from the tension side portion of the winding transmission element.   The tensioner device for a winding transmission mechanism according to claim 1 or 2, wherein the support member is provided with a stopper for restricting a swinging position.   4. The drive pulley is provided with a rotation delay means for transmitting the drive from the drive shaft after the swing motion of the support member is completed. A tensioner device for the winding transmission mechanism described. 5. The winding transmission mechanism according to claim 4, wherein the drive pulley is provided with a means for preventing entrainment due to a tension acting on the winding transmission element when the supporting member swings. Tensioner device.

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