JP2017158247A - roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller which is capable of handling various belt-shaped conveyance objects and improves maintainability.SOLUTION: A roller 1 comprises: a motor part 2 including a stator 21 and a rotor 22 which is oppositely disposed radially outside of the stator 21 and rotated relatively; a cylindrical roller housing 41 which is rotated together with the rotor 22; a cylindrical torsion bar 42 to which the stator 21 is fixed; a penetration shaft 43 which is penetrated while interposing a gap between the penetration shaft and an inner wall of the torsion bar 42 and to which one end of the torsion bar 42 in an axial direction is fixed; bearings 6 and 7 which are disposed at positions holding the motor part therebetween in the axial direction and support the roller housing 41 in a freely rotatable manner; and a cylindrical outer roller 9 which is provided along an outer peripheral surface of the roller housing 41 in a removable manner and rotated together with the rotor 22.SELECTED DRAWING: Figure 1

Description

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

  Patent Document 1 and Patent Document 2 describe a motor built-in roller in which a motor that rotationally drives a roller that is rotatably supported with respect to a fixed shaft is incorporated. These motor built-in rollers described in Patent Document 1 and Patent Document 2 are premised on being used for belt conveyors, roller conveyors, and the like.

JP 2003-102143 A JP 2005-176588 A

  For example, in a film transport apparatus used for manufacturing a high-functional film such as a liquid crystal film or an organic EL film used for a flexible substrate or a curved display, the film does not cause defects such as scratches, wrinkles, and deformation due to slipping at high speed. It is necessary to transport the film with proper tension. Conventionally, in such a film conveying apparatus, a roller for detecting the tension applied to the film is separately provided, the load applied to the tension detecting roller is detected to calculate the tension, and the value is fed back to control the tension. It is carried out. The roller used in such a film transport apparatus differs in the structure and required friction coefficient of the outer peripheral surface of the roller depending on the material and type of the film to be transported in the film transport apparatus. Further, maintenance is required due to wear on the outer peripheral surface of the roller or damage to the structure.

  The present invention has been made in view of the above, and an object of the present invention is to provide a roller that can cope with various belt-like conveyed objects and has high maintainability.

  In order to solve the above-described problems and achieve the object, the roller includes a stator and a motor portion including a rotor that is disposed opposite to the outer side in the radial direction of the stator and relatively rotates, and a cylindrical roller housing that rotates together with the rotor. And a cylindrical torsion bar to which the stator is fixed, and a through shaft that passes through a gap between the inner wall of the torsion bar and fixes one end in the axial direction of the torsion bar, and in the axial direction A cylindrical outer cylinder roller that is disposed at a position sandwiching the motor portion and that rotatably supports the roller housing, and a cylindrical outer cylinder roller that is detachably provided along the outer peripheral surface of the roller housing and rotates with the rotor And having.

  With the above configuration, it is possible to deal with various belt-shaped transported objects by exchanging the outer cylinder roller. Further, when wear on the contact surface with the belt-like transported object or damage to the structure occurs, it is possible to cope with the problem by replacing the outer cylinder roller, and a highly maintainable roller can be obtained.

  As a desirable mode, it is preferable that the outer cylinder roller is prevented from rotating and coming off with the roller housing and fitted in the axial direction, and one end in the axial direction is fixed to the roller housing.

  With the above configuration, it is possible to suppress backlash in the axial direction between the roller housing and the outer cylinder rotor.

  Further, at least a part of the fitting surface of the roller housing and the outer cylindrical roller in the axial direction may have a tapered shape with a small diameter toward the fixed end of the torsion bar and the through shaft.

  In addition, a step portion provided at a predetermined position in the axial direction on the outer peripheral surface of the roller housing and a step portion provided at a predetermined position in the axial direction on the inner peripheral surface of the outer cylinder roller are fitted in the axial direction. Also good.

  Moreover, the diameter of the one part area of the axial direction of the fitting surface of the said roller housing and the said outer cylinder roller may differ from the diameter of another area.

  Further, as a desirable mode, a first rotation detector that detects rotation of the roller housing, and a second rotation detector that detects relative rotation of the other end in the axial direction of the torsion bar with respect to the through shaft. It is preferable that it is the structure which has these.

  With the above configuration, the position information of the motor unit detected by the first rotation detector and the angular displacement of the other end in the axial direction of the torsion bar detected by the second rotation detector are used as targets. By controlling the output of the motor unit so as to obtain a torque at which tension can be obtained, tension control for transporting the belt-shaped transported object with appropriate tension becomes possible.

  The first rotation detector may be provided on one end side in the axial direction with respect to 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, as a desirable mode, a first rotation detector that detects rotation of the roller housing, and a second rotation detector that detects relative rotation of the roller housing with respect to the other end in the axial direction of the torsion bar; It is preferable that it is the structure which has these.

  With the above configuration, the position information detected by the first rotation detector, the position information of the motor unit detected by the first rotation detector, and the position information of the motor unit detected by the second rotation detector By using the difference between the two and the output of the motor unit so as to obtain a torque at which a target tension can be obtained, tension control for transporting the belt-shaped transported object with appropriate tension becomes possible.

  The first rotation detector may be provided on one end side in the axial direction with respect to 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, it is preferable that at least one of the first rotation detector and the second rotation detector is a resolver.

  With the above configuration, it is possible to obtain a roller that is strong against vibration and suitable for use in a high-temperature environment.

  According to the present invention, it is possible to provide a roller that can cope with various belt-like conveyed objects and has high maintainability.

FIG. 1 is a cross-sectional view illustrating an example of a roller according to the first embodiment. FIG. 2 is a diagram illustrating a configuration example of a fitting portion between the rotor housing of the roller and the outer cylinder roller according to the first embodiment. FIG. 3 is a diagram for explaining the relationship between tension and torque applied to the belt-like transported object in the roller according to the first embodiment. FIG. 4 is a diagram illustrating an operation example of the roller according to the first embodiment. FIG. 5 is a cross-sectional view illustrating an example of a roller according to the first modification of the first embodiment. FIG. 6 is a cross-sectional view illustrating an example of a roller according to the second modification of the first embodiment. FIG. 7 is a cross-sectional view illustrating an example of a roller according to the third modification of the first embodiment. FIG. 8 is a cross-sectional view illustrating an example of a roller according to the second embodiment. FIG. 9 is a cross-sectional view illustrating an example of a roller according to the first modification of the second embodiment. FIG. 10 is a cross-sectional view illustrating an example of a roller according to the second modification of the second embodiment. FIG. 11 is a cross-sectional view illustrating an example of a roller according to the third modification of the second embodiment.

  DESCRIPTION OF EMBODIMENTS Embodiments (embodiments) 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. The constituent elements described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the constituent elements described below can be appropriately combined.

(Embodiment 1)
FIG. 1 is a cross-sectional view illustrating 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 using a speed reduction mechanism. As shown in FIG. 1, the roller 1 includes a motor unit 2 that generates power for transporting a belt-like transported object such as a liquid crystal film or an organic EL film used for a flexible substrate or a curved display, as an example. 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 the 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 includes a stator 21 and a rotor 22 that can rotate with respect to the stator 21. The rotor 22 rotates about the rotation axis AX. Hereinafter, a direction parallel to the rotation axis AX is also referred to as an “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 a plurality of teeth arranged at equal intervals around the rotation axis AX. A plurality of coils 21B are provided. Coil 21B is supported by each of a plurality of teeth of stator core 21A.

  The rotor 22 includes a plurality of 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 with a gap g1.

  In the present embodiment, the rotation detector 3 is a resolver including a resolver stator 31 and a resolver rotor 32, and position information including at least one of the rotation speed, the rotation direction, and the rotation 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 together with the rotor 22, a torsion bar 42, a through shaft 43, and a disk member 45.

  The through shaft 43 is provided through the torsion bar 42. One end of the through shaft 43 in the axial direction is fixed to one end of the torsion bar 42 in the axial direction. The through shaft 43 is opposed to the torsion bar 42 via the gap g2 from the fixing portion with the torsion bar 42 toward the other end in the axial direction. The other end of the through shaft 43 in the axial direction passes through the disk member 45 and is mechanically connected to the disk member 45 by a nut 43B via a disc spring 43C that is an elastic member.

  The torsion bar 42 extends from the disc portion 42A to the other end in the axial direction through a gap g2 between the disc portion 42A provided at one end in the axial direction fixed to the through shaft 43 and the through shaft 43. A cylindrical portion 42B. On the outer peripheral surface of the cylindrical portion 42B of the torsion bar 42, a stator core 21A of the stator 21 and a resolver stator 31 of the rotation detector 3 are provided. A support member 44 is provided at the other end in the axial direction of the cylindrical portion 42B. Hereinafter, one axial end where the torsion bar 42 is fixed to the through shaft 43 is also referred to as “a fixed end between the torsion bar 42 and the through shaft 43”. Further, the other end in the axial direction of the cylindrical portion 42B is also referred to as “the open end of the torsion bar 42”. In the example shown in FIG. 1, the installation surface with the facility is a surface on the fixed end side of the torsion bar 42 and the through shaft 43.

  The support member 44 includes a disc 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 disc portion 44A to the other end side in the axial direction. A resolver rotor 52 of the torque detector 5 is provided on the inner peripheral surface of the cylindrical portion 44 </ b> B of the support member 44, and the resolver stator 51 of the torque detector 5 is disposed on the penetrating 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 42 </ b> A of the torsion bar 42 via the first bearing 6, and the other end in the axial direction is the outer periphery of the disk member 45 via the second bearing 7. Supported by the department. The first bearing 6 has an inner ring supported by the disk portion 42 </ b> A of the torsion bar 42 and an outer ring supported by the inner peripheral surface of the roller housing 41. The second bearing 7 has an inner ring supported by the disk member 45 and an outer ring supported by the inner peripheral surface of the roller housing 41.

  In the present embodiment, a cylindrical outer cylinder roller 9 is provided along the outer peripheral surface of the roller housing 41.

  As shown in FIG. 1, the outer cylinder roller 9 is provided in contact with the cylindrical portion 91 provided along the outer peripheral surface of the roller housing 41 and the fixed end side of the torsion bar 42 and the through shaft 43 of the roller housing 41. The screw 101 is screwed in the axial direction into the screw hole 43D, so that the roller housing 41 and the disk portion 92 of the outer cylindrical roller 9 are fixed. The configuration of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylinder roller 9 will be described later.

  On the inner peripheral surface of the roller housing 41, the rotor 22 of the motor unit 2 is provided at a position facing the stator 21 of the motor unit 2, and the resolver of the rotation detector 3 is positioned 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, an example is shown in which the rotation detector 3 is arranged on the fixed end side of the torsion bar 42 and the through shaft 43 with respect to the motor unit 2.

  The penetrating shaft 43, the disk portion 42 </ b> A of the torsion bar 42, the disk member 45, and the disc spring 43 </ b> C constitute a preload mechanism that applies preload to the first bearing 6 and the second bearing 7.

  The first bearing 6 is clamped in the axial direction with the corner of the outer ring abutting against the step 41A of the roller housing 41 and the corner of the inner ring abutting the step 42D of the disk portion 42A of the torsion bar 42. The second bearing 7 is sandwiched in the axial direction with the corner of the outer ring abutting against the step 41B of the roller housing 41 and the corner of the inner ring abutting the step 45C of the disk member 45. In this state, the nut 43B is tightened via the disc spring 43C, and the disc spring 43C is compressed to L shorter than the natural length, so that preload is applied to both the first bearing 6 and the second bearing 7. it can. Thereby, the shift | offset | difference of an axial direction and radial direction is suppressed, and generation | occurrence | production of the play of the axial direction at the time of driving the motor part 2 and radial direction can be suppressed.

  FIG. 2 is a diagram illustrating a configuration example of a fitting portion between the rotor housing of the roller and the outer cylinder roller according to the first embodiment.

  As described above, in the present embodiment, the cylindrical outer cylinder roller 9 is provided along the outer peripheral surface of the roller housing 41. The outer cylinder roller 9 is detachably attached to the roller housing 41 and rotates together with the rotor 22. The roller 1 according to the present embodiment can be replaced with the outer cylinder roller 9 according to the type of the belt-shaped transported object by providing the outer cylinder roller 9 that can be attached to and detached from the roller housing 41. Further, when wear of the contact surface with the belt-shaped transported object, damage to the structure, or the like occurs, it is possible to cope with the problem by replacing the outer cylinder roller 9, and the highly maintainable roller 1 can be obtained. When fitting the outer cylinder rotor 9 to the roller housing 41, it is necessary to suppress backlash in the axial direction between the roller housing 41 and the outer cylinder rotor 9.

  The fitting surface of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 is, for example, as shown in FIG. 2A, the entire axial section faces the fixed end of the torsion bar 42 and the through shaft 43. The structure which exhibits the taper shape used as a small diameter may be sufficient.

  Further, the fitting surface of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 has, for example, at least a partial section in the axial direction (in the example shown in FIG. 2B), as shown in FIG. The section B) may have a tapered shape with a small diameter toward the fixed end between the torsion bar 42 and the through shaft 43.

  In the example shown in FIG. 2B, the diameter r1 of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the section A on the fixed end side between the torsion bar 42 and the through shaft 43 is the torsion bar. In the section B between the section A and the section C, the torsion bar 42 is smaller than the diameter r2 of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the section C on the open end side of 42. Although the example which shows the taper shape which becomes small diameter toward the fixed end with the penetration shaft 43 is shown, the area which shows the taper shape which becomes small diameter toward the fixation end of the torsion bar 42 and the penetration shaft 43 is shown in FIG. A section A on the fixed end side between 42 and the through shaft 43 may be used, or a section C on the open end side of the torsion bar 42 may be used.

  The fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 is, for example, a step provided at a predetermined position in the axial direction of the outer peripheral surface of the roller housing 41 as shown in FIG. The part 41a and the step part 91a provided in the predetermined position of the axial direction of the internal peripheral surface of the cylindrical part 91 of the outer cylinder roller 9 may be configured to fit in the axial direction.

  In the example shown in FIG. 2C, the diameter r3 of the fitting surface of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the section D on the fixed end side between the torsion bar 42 and the through shaft 43 is the torsion bar. An example in which the diameter r4 of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the section E on the open end side of 42 is smaller is shown. That is, as shown in FIG. 2C, a partial section in the axial direction of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 (section D in the example shown in FIG. 2C). The diameter r3 may be different from the diameter r4 of the other section (section E in the example shown in FIG. 2C).

  The fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylinder roller 9 is, for example, a step provided at a predetermined position in the axial direction of the outer peripheral surface of the roller housing 41 as shown in FIG. The portion 41a1 and the stepped portion 91a1 provided at a predetermined position in the axial direction of the inner peripheral surface of the cylindrical portion 91 of the outer cylindrical roller 9 are fitted in the axial direction, and at the predetermined position in the axial direction of the outer peripheral surface of the roller housing 41. The stepped portion 41a2 provided and the stepped portion 91a2 provided at a predetermined position in the axial direction of the inner peripheral surface of the cylindrical portion 91 of the outer cylindrical roller 9 may be fitted in the axial direction.

  In the example shown in FIG. 2D, the diameter r3 of the fitting surface of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the section F on the fixed end side between the torsion bar 42 and the through shaft 43, and the torsion bar 42, the diameter r3 of the fitting surface of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the section H on the open end side is equal, and in the section G between the section F and the section H, the roller housing 41 and An example in which the diameter r4 of the fitting surface of the outer cylindrical roller 9 with the cylindrical portion 91 is larger than the diameter r3 of the fitting surface of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the sections F and H. Is shown. That is, in the example shown in FIG. 2D, a partial section in the axial direction of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 (section G in the example shown in FIG. 2D). Is larger than the diameter r3 of other sections (section F and section H in the example shown in FIG. 2D).

  Further, in the example shown in FIG. 2 (e), a predetermined position in the axial direction of the stepped portion 41 a 3 provided at a predetermined position in the axial direction of the outer peripheral surface of the roller housing 41 and the inner peripheral surface of the cylindrical portion 91 of the outer cylindrical roller 9. The step portion 91a3 provided in the shaft is fitted in the axial direction, and the step portion 41a4 provided at a predetermined position in the axial direction of the outer peripheral surface of the roller housing 41 and the shaft of the inner peripheral surface of the cylindrical portion 91 of the outer cylindrical roller 9 The step portion 91 a 4 provided at a predetermined position in the direction is configured to fit in the axial direction, and the cylindrical portion 91 of the roller housing 41 and the outer cylindrical roller 9 in the section F on the fixed end side between the torsion bar 42 and the through shaft 43. The diameter r3 of the fitting surface is equal to the diameter r3 of the fitting surface of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the section H on the open end side of the torsion bar 42. In the section G between the interval H, the diameter r5 of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 is the same as that of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 in the sections F and H. In this example, the fitting surface is smaller than the diameter r3. That is, in the example shown in FIG. 2E, a partial section in the axial direction of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 (section G in the example shown in FIG. 2D). The diameter r5 is smaller than the diameter r3 of other sections (section F and section H in the example shown in FIG. 2D).

  That is, as shown in FIGS. 2D and 2E, a partial section in the axial direction of the fitting surface between the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 (shown in FIG. 2D). In the example, the diameter r5 of the section G) may be different from the diameter r3 of the other sections (section F and section H in the example shown in FIG. 2D).

  As described above, by setting the fitting surfaces of the roller housing 41 and the cylindrical portion 91 of the outer cylindrical roller 9 to the configuration examples shown in FIG. 2, the axial direction between the roller housing 41 and the outer cylindrical rotor 9 is achieved. Can be suppressed.

  Next, the operation of the roller 1 according to the first embodiment will be described with reference to FIGS. 1, 3, and 4. FIG. 3 is a diagram for explaining the relationship between tension and torque applied to the belt-like transported object in the roller according to the first embodiment. FIG. 4 is a diagram illustrating an operation example of the roller according to the first embodiment.

  As shown in FIG. 3, when the radius of the roller housing 41 in the roller 1 is r and the tension applied to the belt-shaped transported object 200 is F, the torque T acting around the rotation axis AX is expressed by T = F × r. . When this is deformed with respect to the tension F, it is expressed as the following equation (1). That is, the tension F can be obtained by detecting the torque T.

  F = T / r (1)

  Here, in this embodiment, the rigidity with respect to the rotation direction of the through shaft 43 is sufficiently large with respect to the torque generated by the driving force of the motor unit 2, and the rigidity with respect to the rotation direction of the torsion bar 42 is the rotation direction of the through shaft 43. It should be smaller than the rigidity against.

  As shown in FIG. 4, when the motor unit 2 is driven and the roller housing 41 is rotated in the direction indicated by the arrow A, the cylindrical portion 42B of the torsion bar 42 to which the stator core 21A of the stator 21 is fixed is opposed to the direction indicated by the arrow B. A force acts and a relative twist occurs with respect to the penetrating shaft 43.

  In the present embodiment, the rotation detector 3 is a first rotation detector, and the torque detector 5 is a second rotation detector that can detect an angular displacement of, for example, 1 degree or less, and the motor unit 2 is used. The angular displacement (small angle θ) of the open end of the torsion bar 42 when driven is detected. By converting the angular displacement of the open end of the torsion bar 42 into the torque T, the tension F shown in the equation (1) can be obtained. That is, the position information of the motor unit 2 detected by the rotation detector 3 (first rotation detector) and the angle of the open end of the torsion bar 42 detected by the torque detector 5 (second rotation detector). By using the displacement (small angle θ) and controlling the output of the motor unit 2 so as to obtain a torque at which a target tension can be obtained, tension control for transporting the belt-shaped transported object 200 with appropriate tension is achieved. It becomes possible.

  The gap g2 is preferably narrow enough not to inhibit the torsion bar 42 from being twisted when the motor unit 2 is driven. More specifically, the gap g2 is preferably about 0.05 mm to 0.2 mm, for example. Further, by providing the gap g2 between the cylindrical portion 42B of the torsion bar 42 and the penetrating shaft 43, the error range of the gap g1 interposed between the stator core 21A of the stator 21 and the rotor 22 is increased. Here, when the relationship between the gap g1 and the gap g2 is g1 ≦ g2, the stator core 21A of the stator 21 and the rotor 22 may come into contact with each other when the motor unit 2 is driven. For this reason, the relationship between the gap g1 and the gap g2 is preferably g1> g2.

  Further, in the example shown in FIG. 1, the shielding plate 8 is provided to prevent the magnetic interference between the rotation detector 3 and the motor unit 2. However, the rotation detector 3 and the motor unit 2 have a magnetic interference between each other. In the case where they are arranged so as not to be affected by the above, the shielding plate 8 may not be provided. In addition, by configuring the support member 44 with a ferromagnetic member having a magnetic shielding effect, it is possible to prevent magnetic interference between the torque detector 5 and the motor unit 2, and the example shown in FIG. Then, a shielding 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 mutual magnetic interference.

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

(Modification 2)
FIG. 6 is a cross-sectional view illustrating an example of a roller according to the second modification of the first embodiment. In the roller 1 b shown in FIG. 6, the rotation detector 3 is provided on the other end side in the axial direction from the torque detector 5.

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

  In the first modification shown in FIG. 5, 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 the motor unit 2 is driven is larger than in the example shown in FIG. In addition, the range of change in the position information of the motor unit 2 detected by the rotation detector 3 when the motor unit 2 is driven is sufficiently large with respect to the relative twist of the cylindrical portion 42B of the torsion bar 42 with respect to the through shaft 43. Since it 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.

  In the second modification shown in FIG. 6, the resolver stator 31 of the rotation detector 3 is provided on the penetrating shaft 43 having a greater rotational rigidity than the torsion bar 42. For this reason, 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 42 </ b> B of the torsion bar 42 with respect to the through shaft 43.

  As described above, the position information detected by the rotation detector 3 is obtained even if the resolver stator 31 of the rotation detector 3 is arranged in the cylindrical portion 42B of the torsion bar 42, and the resolver stator 31 of the rotation detector 3 is passed through the shaft. It can be regarded as equivalent to the case where it is arranged at 43. That is, the rotation detector 3 can be regarded as detecting position information of the roller housing 41 with respect to the through shaft 43.

(Modification 3)
FIG. 7 is a cross-sectional view illustrating an example of a roller according to the third modification of the first embodiment. In the roller 1 c shown in FIG. 7, the attachment surface with the facility is a surface on the open end side of the torsion bar 42.

  The disk member 45a is provided with a screw hole 45B for fixing to the equipment with a screw.

  In the configuration shown in FIG. 7, by opening the adjustment hole in the facility, the nut 43 </ b> B can be accessed from the facility side, and the maintenance work becomes easy. Further, the motor unit 2, the rotation detector 3, and the torque detector 5 are arranged close to the equipment side in the axial direction, so that the position of the center of gravity of the roller 1c in the axial direction is close to the equipment side, The load applied to the connecting portion can be reduced.

  Further, in the configuration shown in FIG. 7, a roller (surface on the fixed end side between the torsion bar 42 and the penetrating shaft 43) opposite to the installation surface (surface on the open end side of the torsion bar 42) with the roller The housing 41 and the disk portion 92 of the outer cylinder roller 9 are fixed. For this reason, it is possible to replace the outer cylinder roller 9 without removing the roller 1c from the facility. With this configuration, it is possible to obtain a roller 1c with higher maintainability.

  In the present embodiment, as described above, the rotation detector 3 is the first rotation detector and the torque detector 5 is the second rotation detector that can detect an angular displacement of 1 degree or less, for example. It is the structure which detects the angular displacement (micro angle | corner (theta)) of the open end of the torsion bar 42 with respect to the penetration shaft 43 when the motor part 2 is driven. That is, as the torque detector 5 (second rotation detector), a rotation detector with higher resolution than the rotation detector 3 (first rotation detector) that detects position information of the motor unit 2 is used. More specifically, it is desirable that the torsion bar 42 has a resolution smaller than 1/100 when the torsion amount of the torsion bar 42 when the maximum torque of the motor unit 2 is generated is 1.

  In the present embodiment, the torque detector 5 may be a strain gauge provided on the torsion bar 42, for example. In this case, by detecting the resistance value fluctuation amount of the strain gauge when the motor unit 2 is driven and converting the resistance value fluctuation amount of the strain gauge into the torque T, the tension F shown in the equation (1) is obtained. As described above, tension control for transporting the belt-shaped transported object 200 with appropriate tension becomes possible.

  As described above, the rollers 1, 1 a, 1 b, and 1 c according to the first embodiment include the stator 21 and the motor unit 2 including the rotor 22 that is opposed to the radial direction of the stator 21 and rotates relatively, and the rotor 22. A cylindrical roller housing 41 that rotates with the cylindrical roller housing 41, a cylindrical torsion bar 42 to which the stator 21 is fixed, and an inner wall of the torsion bar 42 are passed through a gap g1, and one of the torsion bars 42 in the axial direction is inserted. A through shaft 43 that fixes the end, a first bearing 6 and a second bearing 7 that are disposed at positions sandwiching the motor unit 2 in the axial direction and rotatably support the roller housing 41, and an outer peripheral surface of the roller housing 41 And a cylindrical outer cylinder roller 9 that is detachably provided along the rotor 22 and rotates together with the rotor 22.

  With the above configuration, it is possible to deal with various belt-shaped transported objects 200 by exchanging the outer cylinder roller 9. Further, when wear of the contact surface with the belt-shaped transported object 200, damage to the structure, or the like occurs, the outer cylinder roller 9 can be replaced to obtain a roller 1, 1a, 1b, 1c having high maintainability. be able to.

  Further, the outer cylinder roller 9 is prevented from rotating and coming off the roller housing 41 and fitted in the axial direction, and one end in the axial direction is fixed to the roller housing 41.

  With the above configuration, it is possible to suppress backlash in the axial direction between the roller housing 41 and the outer cylinder rotor 9.

  The rollers 1, 1 a, 1 b, and 1 c according to the first embodiment include the rotation detector 3 (first rotation detector) that detects the rotation of the roller housing 41 and the axial direction of the torsion bar 42 with respect to the through shaft 43. And a torque detector 5 (second rotation detector) for detecting relative rotation of the other end.

  In this configuration, the position information of the motor unit 2 detected by the rotation detector 3 (first rotation detector) and the axial direction of the torsion bar 42 detected by the torque detector 5 (second rotation detector). By using the angular displacement (small angle θ) of the other end of the motor to output control the motor unit 2 so as to obtain a torque that can achieve a target tension, the belt-shaped transported object 200 is transported with an appropriate tension. Therefore, the tension control can be performed. This eliminates the need for a tension detection roller, thereby reducing the total number of rollers used in the film transport path.

(Embodiment 2)
FIG. 8 is a cross-sectional view illustrating an example of a roller according to the second embodiment. In addition, the same code | symbol is attached | subjected to the same component as Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

  In the roller 1d in the present embodiment, the configuration of the fitting portion between the rotor housing 41 and the outer cylinder roller 9 is the same as that in the first embodiment described above.

  Unlike the configuration of the first embodiment, the roller 1d in the present embodiment is configured to detect relative position information of the roller housing 41 with respect to the open end of the torsion bar 42 by the second rotation detector 5.

  In the example shown in FIG. 8, the second rotation detector 5 is provided at the open end of the torsion bar 42, and the first rotation detector 3 sandwiches the motor unit 2 with respect to the second rotation detector 5. It is provided on the fixed end side between the torsion bar 42 and the through shaft 43. 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 connected to the torsion bar 42 and the through shaft rather than the motor 2. 43 near the fixed end. 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 peripheral surface of the rotor 41, and the resolver rotor 52 of the second rotation detector 5. Is provided at a position facing the resolver stator 51 of the second rotation detector 5 on the inner peripheral surface of the rotor 41.

  The amount of twist in the rotational direction of the torsion bar 42 relative to the through shaft 43 generated by the reaction force received by the torsion bar 42 when the motor unit 2 is driven is zero at the fixed end of the torsion bar 42 and the through shaft 43, and the axial direction It becomes larger toward the open end of the torsion bar 42. That is, the amount of twist in the rotational direction at the axial position of the torsion bar 42 where the first rotation detector 3 is disposed is the amount of twist in the rotational direction at the open end of the torsion bar 42 where the second rotation detector 5 is disposed. Less than the amount. In other words, the position 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 position information detected by the second rotation detector 5.

  In this 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 taken, and this difference is twisted in the rotational direction of the torsion bar 42. Is converted into a torque T as an angular displacement by. Thereby, the tension F shown to (1) Formula of Embodiment 1 can be calculated | required. 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 using the difference from the position information and controlling the output of the motor unit 2 so that the target tension can be obtained, tension control for transporting the belt-shaped transported 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. However, in the present embodiment, as described above, 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 taken, and this difference is angularly displaced due to the twist of the torsion bar 42 in the rotational direction. As a configuration intended to be converted into torque T. 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 (second rotation detector) in the first embodiment. More specifically, it is preferable to have a resolution smaller than 1/100 when the torsion amount of the torsion bar 42 when the maximum torque of the motor unit 2 is generated is 1.

(Modification 1)
FIG. 9 is a cross-sectional view illustrating an example of a roller according to the first modification of the second embodiment. In the roller 1e shown in FIG. 9, the first rotation detector 3 is disposed closer to the fixed end of the torsion bar 42 and the through shaft 43 than in the example shown in FIG.

(Modification 2)
FIG. 10 is a cross-sectional view illustrating an example of a roller according to the second modification of the second embodiment. In the roller 1 f shown in FIG. 10, the first rotation detector 3 is provided on the other end side in the axial direction with respect to 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 is the cylindrical portion 42B 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 position information of the roller housing 41 with respect to the through shaft 43.

  On the other hand, in this embodiment, the greater the difference between the position information detected by the first rotation detector 3 and the position information detected by the second rotation detector 5, the higher the control accuracy of the subsequent stage. it can.

  In the first modification shown in FIG. 9, the twist in the rotational direction position of the resolver stator 31 of the first rotation detector 3 relative to the through shaft 43 when the motor unit 2 is driven is smaller than in the example shown in FIG. 1. That is, the influence on the detection accuracy of the first rotation detector 3 by the twist of the first rotation detector 3 in the rotational direction position of the resolver stator 31 with respect to the through shaft 43 when the motor unit 2 is driven can be reduced. 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 the example shown in FIG.

  In the second modification shown in FIG. 10, the resolver stator 31 of the first rotation detector 3 is provided on the penetrating shaft 43 that has higher rotational rigidity than 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 the example shown in FIG.

(Modification 3)
FIG. 11 is a cross-sectional view illustrating an example of a roller according to the third modification of the second embodiment. In the roller 1g shown in FIG. 10, the attachment surface with the facility is the surface on the open end side of the torsion bar 42.

  The disk member 45a is provided with a screw hole 45B for fixing to the equipment with a screw.

  In the configuration shown in FIG. 11, by opening the adjustment hole in the facility, the nut 43B can be accessed from the facility side, and the maintenance work becomes easy. In addition, the motor unit 2, the rotation detector 3, and the torque detector 5 are arranged close to the equipment side in the axial direction, so that the position of the center of gravity of the roller 1g in the axial direction is close to the equipment side. The load applied to the connecting portion can be reduced.

  Further, in the configuration shown in FIG. 11, a roller (surface on the fixed end side of the torsion bar 42 and the penetrating shaft 43) opposite to the attachment surface (surface on the open end side of the torsion bar 42) with the roller The housing 41 and the disk portion 92 of the outer cylinder roller 9 are fixed. For this reason, it is possible to replace the outer cylinder roller 9 without removing the roller 1g from the facility. With this configuration, it is possible to obtain a roller 1g with higher maintainability.

  As described above, the rollers 1d, 1e, 1f, and 1g according to the second embodiment include the stator 21 and the rotor 22 that is opposed to the radially outer side of the stator 21 and rotates relative to the stator 21 as in the first embodiment. The motor unit 2, a cylindrical roller housing 41 that rotates together with the rotor 22, a cylindrical torsion bar 42 to which the stator 21 is fixed, and an inner wall of the torsion bar 42 are penetrated through a gap g 1, and the torsion A through shaft 43 that fixes one end of the bar 42 in the axial direction, and a first bearing 6 and a second bearing 7 that are disposed at a position sandwiching the motor unit 2 in the axial direction and rotatably support the roller housing 41. And a cylindrical outer cylinder roller 9 which is detachably provided along the outer peripheral surface of the roller housing 41 and rotates together with the rotor 22.

  With the above configuration, it is possible to deal with various belt-shaped transported objects 200 by exchanging the outer cylinder roller 9. Further, when wear of the contact surface with the belt-shaped transported object 200, damage to the structure, or the like occurs, the outer cylinder roller 9 can be replaced to obtain a roller 1, 1a, 1b, 1c having high maintainability. be able to.

  Further, the outer cylinder roller 9 is prevented from rotating and coming off the roller housing 41 and fitted in the axial direction, and one end in the axial direction is fixed to the roller housing 41.

  With the above configuration, it is possible to suppress backlash in the axial direction between the roller housing 41 and the outer cylinder rotor 9.

  In addition, the rollers 1d, 1e, 1f, and 1g according to the second embodiment include the first rotation detector 3 that detects the rotation of the roller housing 41 and the relative position of the roller housing 41 with respect to the other end in the axial direction of the torsion bar 42. And a second rotation detector 5 for detecting a simple rotation.

  In this configuration, the position information detected by the first rotation detector 3, the position information of the motor section 2 detected by the first rotation detector 3, and the motor section detected by the second rotation detector 5. The tension control for transporting the belt-shaped transported object 200 with an appropriate tension by controlling the output of the motor unit 2 so that the target tension can be obtained using the difference from the position information of 2. Is possible. This eliminates the need for a tension detection roller, thereby reducing 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. Magnetic sensors such as resolvers are resistant to vibration and suitable for applications in high-temperature environments. However, when more precise control is required, an optical encoder is used as a rotation detector. Needless to say, a general sensor such as a Hall IC 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. However, even in a configuration using a VR (Variable Reluctance) type motor. good. The PM type motor can rotate more smoothly, but it is needless to say that a VR type motor is suitable for use in a high temperature environment, and a VR type motor may be used as the motor unit. .

  When a resolver is used as the rotation detector, the magnetic pole position estimation operation at the time of starting can be omitted by matching the number of teeth of the resolver with the number of teeth of the motor unit.

  As described above, by using the rollers 1, 1 a, 1 b, 1 c, 1 d, 1 e, 1 f, and 1 g according to this embodiment, it is possible to control the tension of the belt-shaped transported object 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 manufacturing high-functional films such as liquid crystal films or organic EL films used for flexible substrates and curved displays, for example. Suitable for use in the film transport apparatus used.

1, 1a, 1b, 1c, 1d, 1e, 1f, 1g Roller 2 Motor section 3 Rotation detector (first rotation detector)
4 Housing 5 Torque detector (second rotation detector)
6 1st bearing 7 2nd bearing 8 Shield plate 9 Outer cylindrical roller 21 Stator 21A Stator core 21B Coil 22 Rotor 41 Roller housing 41A Step 41a, 41a1, 41a2, 41a3, 41a4 Step (roller housing)
42 torsion bar 42A disk part 42B cylindrical part 42D step 43 through shaft 43A fitting part 43B nut 43D screw hole 44 support member 44A disk part 44B cylindrical part 45, 45a disk member 45B screw hole 91 cylindrical part (outer cylinder roller)
91a, 91a1, 91a2, 91a3, 91a4 Stepped portion (outer cylinder roller)
92 Disc (outer cylinder roller)
101 Screw 200 Band-shaped object AX Rotating shaft g1, g2 Gap

Claims (13)

A motor unit including a stator and a rotor that is disposed opposite to the outer side in the radial direction of the stator and relatively rotates;
A cylindrical roller housing that rotates with the rotor;
A cylindrical torsion bar to which the stator is fixed;
A penetrating shaft that is penetrated through a gap between the inner wall of the torsion bar and fixes one end in the axial direction of the torsion bar; and
A bearing which is disposed at a position sandwiching the motor portion in the axial direction and rotatably supports the roller housing;
A cylindrical outer cylinder roller which is detachably provided along the outer peripheral surface of the roller housing and rotates together with the rotor;
Having a roller.   2. The roller according to claim 1, wherein the outer cylinder roller is prevented from rotating and prevented from coming off from the roller housing and fitted in the axial direction, and one end in the axial direction is fixed to the roller housing.   3. The taper shape according to claim 2, wherein at least a partial section in an axial direction of a fitting surface between the roller housing and the outer cylinder roller has a tapered shape having a small diameter toward a fixed end between the torsion bar and the through shaft. Roller.   A step portion provided at a predetermined position in the axial direction of the outer peripheral surface of the roller housing and a step portion provided at a predetermined position in the axial direction of the inner peripheral surface of the outer cylinder roller are fitted in the axial direction. Item 3. The roller according to item 2.   The roller according to claim 2, wherein a diameter of a partial section in an axial direction of a fitting surface between the roller housing and the outer cylinder roller is different from a diameter of another section. A first rotation detector for detecting rotation of the roller housing;
A second rotation detector that detects relative rotation of the other end of the torsion bar in the axial direction with respect to the through shaft;
Having
The roller according to any one of claims 1 to 5.   The roller according to claim 6, wherein the first rotation detector is provided closer to one end side in the axial direction than the motor unit.   The roller according to claim 6, wherein the first rotation detector is provided between the motor unit and the second rotation detector.   The roller according to claim 6, wherein the first rotation detector is provided on the other end side in the axial direction with respect to the second rotation detector. A first rotation detector for detecting rotation of the roller housing;
A second rotation detector for detecting relative rotation of the roller housing with respect to the other axial end of the torsion bar;
Having
The roller according to any one of claims 1 to 5.   The roller according to claim 10, wherein the first rotation detector is provided on one end side in the axial direction with respect to the motor unit.   The roller according to claim 10, wherein the first rotation detector is provided on the other end side in the axial direction with respect to the second rotation detector.   The roller according to any one of claims 1 to 12, wherein at least one of the first rotation detector and the second rotation detector is a resolver.

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