JP6507964B2 - roller - Google Patents

Description

  The present invention relates to a roller used, for example, in a film transport apparatus.

  Patent Document 1 and Patent Document 2 describe a motor-integrated roller in which a motor for rotatably driving a roller rotatably supported with respect to a fixed shaft is incorporated. The motor built-in roller described in these patent documents 1 and patent documents 2 presuppose that it is used for a belt conveyor, a roller conveyor, etc.

JP 2003-102143 A JP, 2005-176588, A

  For example, in a film transport apparatus used for producing a high-performance film such as a liquid crystal film or an organic EL film used for a flexible substrate or a curved surface display, the film can be processed at high speed without causing defects such as scratches, wrinkles and deformation due to slip. It is necessary to transport the film under proper tension. Conventionally, in such a film transport apparatus, a roller for detecting tension applied to the film is separately provided, the load applied to the roller for tension detection is detected, tension is calculated, and the value is fed back to control tension. It is carried out.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a roller capable of reducing the total number of rollers used in a film transport path.

  In order to solve the problems described above and achieve the object, the roller includes a motor portion including a stator and a rotor which is disposed to face the radial outer side of the stator so as to be opposed to each other, and a cylindrical roller housing which rotates with the rotor. A cylindrical torsion bar to which the stator is fixed, and a through shaft which is penetrated through a gap between the inner wall of the torsion bar and which fixes one axial end of the torsion bar in the axial direction; A bearing, which is disposed at a position sandwiching the motor unit, rotatably supports the roller housing, a first rotation detector that detects rotation of the roller housing, and an axial direction of the torsion bar with respect to the through shaft And a second rotation detector that detects the relative rotation of the other end of the sensor.

  According to the above configuration, the target is obtained using position information of the motor unit detected by the first rotation detector and the angular displacement of the other end of the torsion bar in the axial direction detected by the second rotation detector. By controlling the output of the motor unit so that tension can be obtained, tension control can be performed to convey the band-like conveyed object with an appropriate tension.

  The first rotation detector may be provided closer to one end in the axial direction than the motor unit.

  The first rotation detector may be provided between the motor unit and the second rotation detector.

  The first rotation detector may be provided on the other end side in the axial direction with respect to the second rotation detector.

  Further, in order to solve the problems described above and achieve the object, the roller has a motor portion including a stator and a rotor that is disposed opposite to the radial direction outer side of the stator so as to rotate relative to each other; A penetration shaft is interposed between a roller housing, a cylindrical torsion bar to which the stator is fixed, and an inner wall of the torsion bar, and a penetration shaft for fixing one axial end of the torsion bar, and a shaft A bearing, which is disposed at a position sandwiching the motor unit in a direction, rotatably supports the roller housing, a first rotation detector which detects rotation of the roller housing, and the other of the torsion bars in the axial direction And a second rotation detector for detecting the relative rotation of the roller housing relative to the end.

  With the above configuration, position information detected by the first rotation detector, position information of the motor unit detected by the first rotation detector, and position information of the motor unit detected by the second rotation detector By controlling the output of the motor unit so as to obtain a target tension by using the difference of the above, it is possible to perform tension control for conveying the band-like conveyed object with an appropriate tension.

  The first rotation detector may be provided closer to one end in the axial direction than the motor unit.

  The first rotation detector may be provided on the other end side in the axial direction with respect to the second rotation detector.

  As a desirable mode, at least one of the first rotation detector and the second rotation detector is preferably a resolver.

  According to the above configuration, it is possible to obtain a roller that is resistant to vibration and that is suitable for use in high temperature environments.

  According to the present invention, it is possible to provide a roller capable of reducing the total number of rollers used in the film transport path.

FIG. 1 is a cross-sectional view showing an example of a roller according to the first embodiment. FIG. 2 is a view for explaining the relationship between tension and torque applied to a band-shaped transported object in the roller according to the first embodiment. FIG. 3 is a view showing an operation example of the roller according to the first embodiment. FIG. 4 is a cross-sectional view showing an example of a roller according to Modification 1 of Embodiment 1. FIG. 5 is a cross-sectional view showing an example of a roller according to Modification 2 of Embodiment 1. FIG. 6 is a cross-sectional view illustrating an example of a roller according to a third modification of the first embodiment. FIG. 7 is a cross-sectional view showing an example of a roller according to the second embodiment. FIG. 8 is a cross-sectional view showing an example of a roller according to Modification 1 of Embodiment 2. FIG. 9 is a cross-sectional view showing an example of a roller according to a second modification of the second embodiment. FIG. 10 is a cross-sectional view showing an example of a roller according to a third modification of the second embodiment.

  A mode (embodiment) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited by the contents described in the following embodiments. Further, the components described below include those which can be easily conceived by those skilled in the art and those which are substantially the same. Furthermore, the components described below can be combined as appropriate.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing an example of a roller according to the first embodiment. In the example shown in FIG. 1, the roller 1 is a direct drive motor that directly transmits generated power to an object without intervention of a speed reduction mechanism. As shown in FIG. 1, the roller 1 includes a motor unit 2 that generates a power for transporting a band-like conveyed object, for example, a high-performance film such as a liquid crystal film or an organic EL film used for a flexible substrate or curved display. , A rotation detector 3 for detecting the rotation of the motor unit 2, a housing 4 for holding the motor unit 2 and the rotation detector 3, and a torque detector 5 for detecting a torque generated by the roller 1 . The motor unit 2, the rotation detector 3 and the torque detector 5 are each electrically connected to a control device (not shown), and the roller 1 is controlled by this control device.

  The motor unit 2 has a stator 21 and a rotor 22 rotatable with respect to the stator 21. The rotor 22 rotates around the rotation axis AX. Hereinafter, the direction parallel to the rotation axis AX is also referred to as “axial direction”.

  In the present embodiment, the motor unit 2 is an outer rotor type motor. The rotor 22 is disposed around the stator 21. The rotor 22 is disposed outside the stator 21 with respect to the rotation axis AX.

  The stator 21 has a stator core 21A and a coil 21B supported by the stator core 21A. The stator core 21A has teeth arranged at equal intervals around the rotation axis AX. A plurality of coils 21B are provided. The coil 21B is supported by each of the plurality of teeth of the stator core 21A.

  The rotor 22 includes permanent magnets arranged at equal intervals around the rotation axis AX. The stator core 21A of the stator 21 and the rotor 22 face each other via the gap g1.

  In the present embodiment, the rotation detector 3 is a resolver including a resolver stator 31 and a resolver rotor 32 and includes position information including at least one of the rotational speed, rotational direction, and rotational angle of the rotor 22 in the motor unit 2. To detect.

  In the present embodiment, the torque detector 5 is a resolver including a resolver stator 51 and a resolver rotor 52. The torque detector 5 will be described later.

  The housing 4 includes a cylindrical roller housing 41 that rotates with the rotor 22, a torsion bar 42, a through shaft 43, and a disk member 45.

  The penetration shaft 43 is provided to penetrate the torsion bar 42. One end of the penetration shaft 43 in the axial direction is fixed to one end of the torsion bar 42 in the axial direction, and a fitting portion 43A for positioning the installation 100 with the solder is provided. The through shaft 43 faces the torsion bar 42 via the gap g2 from the fixed portion with the torsion bar 42 toward the other end in the axial direction. The other axial end of the penetration shaft 43 penetrates the disc member 45, and is fixed to the disc member 45 by a nut 43B.

  The torsion bar 42 extends from the disc portion 42A to the other end in the axial direction via a gap g2 between the disc portion 42A provided at one end in the axial direction fixed to the penetrating shaft 43 and the penetrating shaft 43. And a cylindrical portion 42B. The disk portion 42A of the torsion bar 42 is provided with a screw hole 42C for fixing to the facility 100 with the screw 101 and a mounting surface to the facility 100. A stator core 21A of the stator 21 and a resolver stator 31 of the rotation detector 3 are provided on the outer peripheral surface of the cylindrical portion 42B of the torsion bar 42. A support member 44 is provided at the other axial end of the cylindrical portion 42B. Hereinafter, one axial end at which the torsion bar 42 is fixed to the penetration shaft 43 is also referred to as “fixed end of the torsion bar 42”. In addition, the other axial end of the cylindrical portion 42B is also referred to as "the open end of the torsion bar 42".

  The support member 44 includes a disk portion 44A fixed to the open end of the torsion bar 42, and a cylindrical portion 44B extending from the outer peripheral portion of the disk portion 44A to the other end in the axial direction. The resolver rotor 52 of the torque detector 5 is provided on the inner peripheral surface of the cylindrical portion 44B of the support member 44, and the resolver stator 51 of the torque detector 5 is provided on the through shaft 43 at a position facing the resolver rotor 52. Is provided.

  One end of the roller housing 41 in the axial direction is supported by the outer peripheral portion of the disk portion 42A of the torsion bar 42 through the bearing 6, and the other end in the axial direction is supported by the outer peripheral portion of the disk member 45 through the bearing 7. ing. The inner ring of the bearing 6 is supported by the disc portion 42 A of the torsion bar 42, and the outer ring is supported by the inner circumferential surface of the roller housing 41. The inner ring of the bearing 7 is supported by the disk member 45, and the outer ring is supported by the inner circumferential surface of the roller housing 41. A rotor 22 of the motor unit 2 is provided on the inner peripheral surface of the roller housing 41 at a position facing the stator 21 of the motor unit 2, and a resolver for the rotation detector 3 at a position facing the resolver stator 31 of the rotation detector 3. A rotor 32 is provided.

  In the example shown in FIG. 1, the rotation detector 3 is disposed closer to the fixed end of the torsion bar 42 than the motor unit 2 is.

  Next, the operation of the roller 1 according to the first embodiment will be described using FIGS. 1 to 3. FIG. 2 is a view for explaining the relationship between tension and torque applied to a band-shaped transported object in the roller according to the first embodiment. FIG. 3 is a view showing an operation example of the roller according to the first embodiment.

  As shown in FIG. 2, assuming that the radius of the roller housing 41 of the roller 1 is r and the tension applied to the band-like article 200 is F, the torque T acting around the rotation axis AX is represented by T = F × r. . When this is deformed with respect to the tension F, it is expressed as the following equation (1). That is, by detecting the torque T, the tension F can be obtained.

  F = T / r (1)

  Here, in the present embodiment, the rigidity of the penetrating shaft 43 in the rotational direction is sufficiently large with respect to the torque generated by the driving force of the motor unit 2, and the rigidity of the torsion bar 42 in the rotational direction is the rotational direction of the penetrating shaft 43 Should be less than the stiffness for

  As shown in FIG. 3, when the motor unit 2 is driven to rotate the roller housing 41 in the direction of arrow A, the cylindrical portion 42B of the torsion bar 42 to which the stator core 21A of the stator 21 is fixed is opposite to the direction of arrow B. A force acts to cause relative twisting to the through shaft 43.

  In the present embodiment, the rotation detector 3 is a first rotation detector, and the torque detector 5 is, for example, a second rotation detector capable of detecting an angular displacement of 1 degree or less. The angular displacement (small angle θ) of the open end of the torsion bar 42 when it is driven is detected. By converting the angular displacement of the open end of the torsion bar 42 into a torque T, the tension F shown in the equation (1) can be obtained. That is, position information of the motor unit 2 detected by the rotation detector 3 (first rotation detector), and an angle of the open end of the torsion bar 42 detected by the torque detector 5 (second rotation detector) By controlling the output of the motor unit 2 so that the target tension can be obtained using displacement (small angle θ), tension control for conveying the band-like article 200 with appropriate tension is performed. It becomes possible.

  The gap g2 is preferably narrow enough not to inhibit the twisting of the torsion bar 42 when the motor unit 2 is driven. More specifically, for example, it is desirable that the gap g2 be about 0.05 mm to 0.2 mm. Further, by providing the gap g2 between the cylindrical portion 42B of the torsion bar 42 and the through shaft 43, the error range of the gap g1 interposed between the stator core 21A of the stator 21 and the rotor 22 becomes large. Here, when the relationship between the gap g1 and the gap g2 is g1 ≦ g2, the stator core 21A of the stator 21 may come in contact with the rotor 22 when the motor unit 2 is driven. Therefore, it is desirable that the relationship between the gap g1 and the gap g2 be g1> g2.

  Further, in the example shown in FIG. 1, the shielding plate 8 for preventing magnetic interference between the rotation detector 3 and the motor unit 2 is provided, but the magnetic interference between the rotation detector 3 and the motor unit 2 is provided. When it arrange | positions to such an extent that it does not receive to the influence by H, the shielding board 8 does not need to be provided. In addition, it is possible to prevent magnetic interference between the torque detector 5 and the motor unit 2 by configuring the support member 44 with a ferromagnetic member having a magnetic shielding effect, and the example shown in FIG. In the above, the shield plate is not provided between the torque detector 5 and the motor unit 2, but when the support member 44 is made of a member such as resin or aluminum, the torque detector 5 and the motor unit 2 A shielding plate may be provided between them to prevent magnetic interference between them.

(Modification 1)
FIG. 4 is a cross-sectional view showing an example of a roller according to Modification 1 of Embodiment 1. In the roller 1 a shown in FIG. 4, the rotation detector 3 is disposed between the motor unit 2 and the torque detection unit 5.

(Modification 2)
FIG. 5 is a cross-sectional view showing an example of a roller according to Modification 2 of Embodiment 1. In the roller 1 b shown in FIG. 5, the rotation detector 3 is provided on the other end side in the axial direction than the torque detector 5.

  The change range of the position information of the motor unit 2 detected by the rotation detector 3 when the motor unit 2 is driven is sufficiently large relative to the relative twist of the cylindrical portion 42B of the torsion bar 42 with respect to the penetration shaft 43. For this reason, the influence of the axial position where the rotation detector 3 is provided on the detection accuracy of the rotation detector 3 is small.

  In the first modification shown in FIG. 4, the twist in the rotational direction position of the resolver stator 31 of the rotation detector 3 with respect to the through shaft 43 when driving the motor unit 2 becomes larger than the example shown in FIG. The change range of the position information of the motor unit 2 detected by the rotation detector 3 when the motor unit 2 is driven is sufficient for the relative twist of the cylindrical portion 42B of the torsion bar 42 with respect to the penetration shaft 43. Because the size is large, the influence of the position of the rotation detector 3 on the torsion bar 42 on the detection accuracy of the rotation detector 3 can be ignored.

  Further, in the second modification shown in FIG. 5, the resolver stator 31 of the rotation detector 3 is provided on the through shaft 43 whose rigidity in the rotational direction is larger than that of the torsion bar 42. Therefore, the detection accuracy of the rotation detector 3 when the motor unit 2 is driven is not affected by the relative twist of the cylindrical portion 42B of the torsion bar 42 with respect to the through shaft 43.

  As described above, even if the resolver stator 31 of the rotation detector 3 is disposed on the cylindrical portion 42B of the torsion bar 42, the position information detected by the rotation detector 3 penetrates the resolver stator 31 of the rotation detector 3 It can be regarded as equivalent to the case of 43. That is, the rotation detector 3 can be regarded as detecting the positional information of the roller housing 41 with respect to the through shaft 43.

(Modification 3)
FIG. 6 is a cross-sectional view illustrating an example of a roller according to a third modification of the first embodiment. In the roller 1c shown in FIG. 6, a fitting portion 45A for positioning the equipment 100a by means of the inlay is provided on the disc member 45a side.

  The disk member 45 a is provided with a screw hole 45 B for fixing to the equipment 100 a with the screw 101 and a mounting surface to the equipment 100 a.

  In the configuration shown in FIG. 6, by opening the adjustment hole 102 in the equipment 100a, the nut 43B can be accessed from the equipment 100a side, and maintenance work becomes easy. In addition, the motor unit 2, the rotation detector 3, and the torque detector 5 are disposed close to the equipment 100a in the axial direction, whereby the axial center of gravity of the roller 1c becomes closer to the equipment 100a. The load applied to the connection with 100a can be reduced.

  In the present embodiment, as described above, the rotation detector 3 is the first rotation detector, and the torque detector 5 is, for example, the second rotation detector capable of detecting an angular displacement of 1 degree or less. The angular displacement (minute angle θ) of the open end of the torsion bar 42 with respect to the through shaft 43 when the motor unit 2 is driven is detected using this. That is, as the torque detector 5 (second rotation detector), a rotation detector with higher resolution than that of the rotation detector 3 (first rotation detector) for detecting the position information of the motor unit 2 may be used. More preferably, when the amount of torsion of the torsion bar 42 at the time of maximum torque generation of the motor unit 2 is 1, it is desirable to have a resolution smaller than 1/100.

  Further, in the present embodiment, the torque detector 5 may be, for example, a strain gauge provided on the torsion bar 42. In this case, the amount of change in resistance of the strain gauge when the motor unit 2 is driven is detected, and the amount of change in resistance of the strain gauge is converted to torque T to obtain the tension F shown in equation (1). As described above, tension control can be performed to transport the band-like conveyed product 200 with an appropriate tension.

  As described above, the rollers 1, 1a, 1b, and 1c according to the first embodiment include the stator 21 and the motor unit 2 including the rotor 22 disposed opposite to the radial direction outer side of the stator 21 and relatively rotating; The cylindrical roller housing 41, which rotates with it, the cylindrical torsion bar 42 to which the stator 21 is fixed, and the inner wall of the torsion bar 42 are inserted through a gap, and one end of the torsion bar 42 in the axial direction Through the shaft 43 for fixing the motor, the bearings 6 and 7 which are arranged at the position sandwiching the motor portion in the axial direction and rotatably support the roller housing 41, and the rotation detector 3 for detecting the rotation of the roller housing 41 Torque detector 5 (second rotation detector) for detecting relative rotation of the other end of the torsion bar 42 in the axial direction with respect to the through shaft 43 Has rolling and the detector), the.

  In this configuration, position information of the motor unit 2 detected by the rotation detector 3 (first rotation detector) and an axial direction of the torsion bar 42 detected by the torque detector 5 (second rotation detector). The belt-like conveyed product 200 is conveyed with an appropriate tension by controlling the output of the motor unit 2 so as to obtain a torque with which a target tension can be obtained using the angular displacement (small angle θ) of the other end of It is possible to control tension for This eliminates the need for rollers for tension detection, which makes it possible to reduce the total number of rollers used in the film transport path.

Second Embodiment
FIG. 7 is a cross-sectional view showing an example of a roller according to the second embodiment. In addition, the same code | symbol is attached | subjected to the component same as Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

  In the roller 1 d according to this embodiment, unlike the configuration of the first embodiment, the second rotation detector 5 detects relative position information of the roller housing 41 with respect to the open end of the torsion bar 42.

  In the example shown in FIG. 7, the second rotation detector 5 is provided at the open end of the torsion bar 42, and the first rotation detector 3 holds the motor unit 2 with respect to the second rotation detector 5. It is provided on the fixed end side of the torsion bar 42. More specifically, the resolver stator 51 of the second rotation detector 5 is provided at the open end of the torsion bar 42, and the resolver stator 31 of the first rotation detector 3 is the fixed end of the torsion bar 42 rather than the motor 2. It is located close to you. The resolver rotor 32 of the first rotation detector 3 is provided at a position facing the resolver stator 31 of the first rotation detector 3 on the inner circumferential surface of the rotor 41, and the resolver rotor 52 of the second rotation detector 5. Is provided on the inner peripheral surface of the rotor 41 at a position facing the resolver stator 51 of the second rotation detector 5.

  The amount of twist in the rotational direction of the torsion bar 42 with respect to the through shaft 43 generated by the reaction force received by the torsion bar 42 when the motor unit 2 is driven becomes 0 at the fixed end of the torsion bar 42 and opens the torsion bar 42 in the axial direction. It becomes large as it goes to the end. That is, the amount of twist in the rotational direction at the axial position of the torsion bar 42 in which the first rotation detector 3 is disposed is the twist in the rotational direction in the open end of the torsion bar 42 in which the second rotation detector 5 is disposed. Less than the amount. In other words, the positional information detected by the first rotation detector 3 is less affected by the twist in the rotational direction of the torsion bar 42 than the positional information detected by the second rotation detector 5.

  In the present embodiment, the difference between the position information detected by the first rotation detector 3 and the position information detected by the second rotation detector 5 is calculated, and this difference is used as a twist in the rotation direction of the torsion bar 42. Converted to torque T as angular displacement due to Thereby, the tension F shown in equation (1) of the first embodiment can be obtained. That is, the position information detected by the first rotation detector 3, the position information of the motor unit 2 detected by the first rotation detector 3, and the motor unit 2 detected by the second rotation detector 5 By controlling the output of the motor unit 2 so that the target tension can be obtained using the difference from the position information, tension control for conveying the band-like conveyed object 200 with appropriate tension is possible. It becomes.

  In the first embodiment, the change range of the position information of the motor unit 2 detected by the rotation detector 3 when the motor unit 2 is driven is a relative twist of the cylindrical portion 42B of the torsion bar 42 with respect to the through shaft 43. In the present embodiment, although the influence on the detection accuracy of the first rotation detector 3 is small due to the position in the axial direction where the first rotation detector 3 is provided. Then, the difference between the position information detected by the first rotation detector 3 and the position information detected by the second rotation detector 5 is calculated, and this difference is the angular displacement due to the twist in the rotation direction of the torsion bar 42. The torque T is intended to be converted as Therefore, as the first rotation detector 3 and the second rotation detector 5 in the second embodiment, a high resolution rotation detector equivalent to the torque detector 5 (the second rotation detector) in the first embodiment It is preferable to use a resolution smaller than 1/100 when the amount of torsion of the torsion bar 42 at the time of maximum torque generation of the motor unit 2 is 1, more specifically.

(Modification 1)
FIG. 8 is a cross-sectional view showing an example of a roller according to Modification 1 of Embodiment 2. In the roller 1e shown in FIG. 8, the first rotation detector 3 is disposed at a position closer to the fixed end of the torsion bar 42 than in the example shown in FIG.

(Modification 2)
FIG. 9 is a cross-sectional view showing an example of a roller according to a second modification of the second embodiment. In the roller 1 f shown in FIG. 9, the first rotation detector 3 is provided on the other end side in the axial direction than the second rotation detector 5.

  As described in the first embodiment, the change range of the position information of the motor unit 2 detected by the first rotation detector 3 when the motor unit 2 is driven corresponds to the cylindrical portion 42 B of the torsion bar 42 with respect to the through shaft 43 Large enough for the relative twist of Therefore, it can be regarded as equivalent to the case where the resolver stator 31 of the first rotation detector 3 is disposed on the through shaft 43. That is, the first rotation detector 3 can be regarded as detecting the positional information of the roller housing 41 with respect to the through shaft 43.

  On the other hand, in the present embodiment, as the difference between the position information detected by the first rotation detector 3 and the position information detected by the second rotation detector 5 increases, the control accuracy in the subsequent stage can be improved. it can.

  In the first modification shown in FIG. 8, the twist in the rotational direction of the resolver stator 31 of the first rotation detector 3 with respect to the through shaft 43 when the motor unit 2 is driven is smaller than that in the example shown in FIG. That is, to reduce the influence on the detection accuracy of the first rotation detector 3 by the twist in the rotational direction position of the resolver stator 31 of the first rotation detector 3 with respect to the penetrating shaft 43 when driving the motor unit 2 Thus, the difference between the position information detected by the first rotation detector 3 and the position information detected by the second rotation detector 5 can be made larger than in the example shown in FIG.

  In the second modification shown in FIG. 9, the resolver stator 31 of the first rotation detector 3 is provided on the through shaft 43 whose rigidity in the rotational direction is larger than that of the torsion bar 42. Therefore, the detection accuracy of the first rotation detector 3 when the motor unit 2 is driven is not affected by the relative twist of the cylindrical portion 42B of the torsion bar 42 with respect to the through shaft 43, and the first rotation The difference between the position information detected by the detector 3 and the position information detected by the second rotation detector 5 can be made larger than in the example shown in FIG.

(Modification 3)
FIG. 10 is a cross-sectional view showing an example of a roller according to a third modification of the second embodiment. In the roller 1g shown in FIG. 10, a fitting portion 45A for positioning the installation 100a by means of the inlay is provided on the disk member 45a side.

  The disk member 45 a is provided with a screw hole 45 B for fixing to the equipment 100 a with the screw 101 and a mounting surface to the equipment 100 a.

  In the configuration shown in FIG. 10, by opening the adjustment hole 102 in the equipment 100a, the nut 43B can be accessed from the equipment 100a side, and maintenance work becomes easy. Further, by arranging the motor unit 2, the rotation detector 3 and the torque detector 5 close to the equipment 100a in the axial direction, the axial center of gravity of the roller 1f becomes closer to the equipment 100a. The load applied to the connection with 100a can be reduced.

  As described above, the rollers 1d, 1e, 1f, and 1g according to the second embodiment include the stator 21 and the motor portion 2 including the rotor 22 disposed so as to be opposed to the radially outer side of the stator 21 and relatively rotating; The cylindrical roller housing 41, which rotates with it, the cylindrical torsion bar 42 to which the stator 21 is fixed, and the inner wall of the torsion bar 42 are inserted through a gap, and one end of the torsion bar 42 in the axial direction , And the first and second rotation detections for detecting the rotation of the roller housing 41, the bearings 6 and 7 which are disposed at the positions sandwiching the motor portion in the axial direction, and rotatably support the roller housing 41. And a second rotation detector 5 for detecting relative rotation of the roller housing 41 with respect to the other axial end of the torsion bar 42. That.

  In this configuration, position information detected by the first rotation detector 3, position information of the motor unit 2 detected by the first rotation detector 3, and motor unit detected by the second rotation detector 5. By controlling the output of the motor unit 2 so as to obtain a target tension by using the difference with the position information of 2, the tension control for conveying the band-like conveyed product 200 with an appropriate tension Is possible. This eliminates the need for rollers for tension detection, which makes it possible to reduce the total number of rollers used in the film transport path.

  In the first and second embodiments described above, the example in which the resolver is used as the rotation detector has been described. A magnetic sensor such as a resolver is resistant to vibration and suitable for use in high-temperature environments, but if more precise control needs to be performed, an optical encoder can be used as a rotation detector. Needless to say, it may be used.

  In the first and second embodiments described above, an example in which a PM (Permanent Magnet) type motor using a permanent magnet is used for the motor unit has been described, but a configuration using a VR (Variable Reluctance) type motor is also described. good. Although PM motors can rotate more smoothly, it is needless to say that VR motors are suitable for applications under high temperature environments, and VR motors may be used as the motor section. .

  Moreover, when using a resolver as a rotation detector, the magnetic pole position estimation operation | movement at the time of starting can be abbreviate | omitted by matching the number of teeth of a resolver with the number of teeth of a motor part.

  As described above, by using the rollers 1, 1a, 1b, 1c, 1d, 1e, 1f, and 1g according to the present embodiment, it is possible to control the tension of the belt-like article 200 without using a tension detection roller. Therefore, the motors 1, 1a, 1b, 1c, 1d, 1e, 1f and 1g according to this embodiment are used, for example, for producing high-performance films such as liquid crystal films or organic EL films used for flexible substrates and curved displays. Suitable for use in the film transport apparatus used.

1, 1a, 1b, 1c, 1d, 1e, 1f, 1g Rollers 2 Motor unit 3 Rotation detector (first rotation detector)
4 housing 5 torque detector (second rotation detector)
DESCRIPTION OF SYMBOLS 6 bearings 7 bearings 8 shielding plate 21 stator 21A stator core 21B coil 22 rotor 41 roller housing 42 torsion bar 42A disc part 42B cylindrical part 42C screw hole 43 penetrating shaft 43A fitting part 43B nut 44 support member 44A disc part 44B cylindrical part 45, 45a disc member 45A fitting portion 45B screw hole 100, 100a equipment 101 screw 102 adjustment hole 200 band-like conveyed object AX rotation shaft g1, g2 gap

Claims (8)

A motor portion including a stator and a rotor which is disposed to face the radially outer side of the stator so as to rotate relative to each other;
A cylindrical roller housing that rotates with the rotor;
A cylindrical torsion bar to which the stator is fixed;
A penetration shaft which is penetrated through a gap between the torsion bar and the inner wall of the torsion bar and which fixes one axial end of the torsion bar;
A bearing disposed at a position sandwiching the motor portion in the axial direction and rotatably supporting the roller housing;
A first rotation detector for detecting rotation of the roller housing;
A second rotation detector that detects relative rotation of the other axial end of the torsion bar with respect to the penetration shaft;
Have a roller.   The roller according to claim 1, wherein the first rotation detector is provided closer to one end in the axial direction than the motor unit.   The roller according to claim 1, wherein the first rotation detector is provided between the motor unit and the second rotation detector.   The roller according to claim 1, wherein the first rotation detector is provided on the other end side in the axial direction with respect to the second rotation detector. A motor portion including a stator and a rotor which is disposed to face the radially outer side of the stator so as to rotate relative to each other;
A cylindrical roller housing that rotates with the rotor;
A cylindrical torsion bar to which the stator is fixed;
A penetration shaft which is penetrated through a gap between the torsion bar and the inner wall of the torsion bar and which fixes one axial end of the torsion bar;
A bearing disposed at a position sandwiching the motor portion in the axial direction and rotatably supporting the roller housing;
A first rotation detector for detecting rotation of the roller housing;
A second rotation detector that detects relative rotation of the roller housing with respect to the other axial end of the torsion bar;
Have a roller.   The roller according to claim 5, wherein the first rotation detector is provided closer to one end in the axial direction than the motor unit.   The roller according to claim 5, wherein the first rotation detector is provided on the other axial end side of the second rotation detector.   The roller according to any one of the preceding claims, wherein at least one of the first rotation detector and the second rotation detector is a resolver.

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