JP5083341B2 - Film transport device - Google Patents

Description

  The present invention relates to a film transport apparatus for transporting a film.

  2. Description of the Related Art As a conventional film conveying device, a device including a feeding reel that feeds out a film wound in a roll shape and a driving roller that pulls out the film from the feeding reel by rotational driving is known (see Patent Document 1). . In such a film transport apparatus, the film feed amount and tension change as the reel diameter changes as the film is transported. The conventional film transport apparatus makes the film feed amount and tension constant by controlling the rotation speeds of the feeding reel and the driving roller.

JP-A-5-270711

  Here, the film winding state varies. Therefore, the film is not completely wound around the feeding reel. Further, the feeding reel itself may rotate with shaft runout. Accordingly, the film roll rotates with a slight eccentricity. The rotation of the film roll due to such an eccentric state has caused a variation in the tension of the fed film. In the conventional film conveying device, the film tension is made constant by controlling the rotational speed of the feeding reel and the driving roller in consideration of the decrease in the outer diameter of the film roll accompanying the film feeding. However, such a film transport apparatus cannot be controlled in consideration of tension fluctuation due to the eccentricity of the film roll. Even if tension variation is taken into consideration, the load of control calculation becomes very large. In particular, when the film is transported at a low tension, the fluctuation in tension due to the eccentricity of the film roll has had a great influence on the film transport.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a film transport apparatus capable of feeding a film while maintaining a constant tension.

  The film transport device according to the present invention is disposed between a feeding reel that feeds out a film wound in a roll shape, a driving roller that pulls out the film from the feeding reel by rotational driving, and a feeding reel and a driving roller. Tension control means for controlling the tension of the film, and the tension control means is arranged on the most upstream side between the feeding reel and the driving roller and is movable in a direction intersecting with the feeding direction of the film from the feeding reel. A tension control roller; and a driving means for biasing the tension control roller to the film. The driving means applies a constant biasing force to the film in the direction of pulling out the film from the supply reel via the tension control roller. It is characterized by that.

  According to the film transport device of the present invention, the tension control means for controlling the tension of the film includes the tension control roller and the drive means. The tension control roller is movable in a direction intersecting with the feeding direction of the film from the feeding reel. The tension control roller can change the transport direction of the film by contacting the film to be fed at a position adjacent to the feeding reel. Since the tension control roller is movable in a direction intersecting with the feeding direction of the film, the tension acting on the film can be changed by changing the position. Therefore, the tension control roller can adjust the film tension by moving to an appropriate position. On the other hand, the driving means can apply a biasing force to the film in the direction of pulling out the film from the supply reel via the tension control roller. That is, the driving means can maintain the tension control roller at an appropriate position while supporting the film to be conveyed by the tension control roller, and can further move the tension control roller to an appropriate position. In the film transport apparatus according to the present invention, the driving means can apply a constant urging force to the film via the tension control roller. Thereby, the drive means can adjust the position of the tension control roller so that the force received by the tension control roller from the film is kept constant. That is, the drive means can adjust the position of the tension control roller so as to keep the tension of the film constant. When the film tension is increased by decreasing the diameter of the film roll wound on the supply reel, the driving means can move the tension control roller to keep the film tension constant. Even if the tension fluctuation locally occurs due to the eccentricity of the film roll, the driving means can cancel the tension fluctuation of the film by moving the tension control roller locally. Furthermore, the tension control means can control the film tension with a simple configuration and operation. Since there is no need to consider the tension fluctuation of the film, the calculation load for controlling the feeding reel and the driving roller can be greatly reduced. As described above, the film can be fed out while maintaining a constant tension.

  In the film transport apparatus according to the present invention, it is preferable that the film transported downstream from the tension control roller is transported in parallel with the moving direction of the tension control roller. Thus, the boundary position between the downstream film and the tension control roller is constant regardless of the movement of the tension control roller. This keeps the film tension constant.

  Further, in the film transport apparatus according to the present invention, the driving means is constituted by a torque motor and a winding roller attached to the rotating shaft, the tension control roller and the driving means are connected via a wire, and the driving means is It is preferable that the tension control roller is moved by winding or unwinding the wire with the winding roller, and the winding roller is formed with a spiral groove for accommodating the wire. Thereby, the wire used for the movement of the tension control roller is accommodated in the spiral groove during winding. Accordingly, since the wires can be prevented from overlapping at the time of winding, it is possible to prevent winding marks from remaining on the wire. Further, since the wire is wound and unwound along the spiral groove, the tension control roller can move smoothly. Further, since the wire is accommodated in the spiral groove, the winding diameter and the unwinding diameter of the wire can be kept constant. Therefore, the urging force of the tension control roller with respect to the film is kept constant.

  In the film transport apparatus according to the present invention, specifically, the tension control means includes a guide means that extends in the movement direction of the tension control roller, guides the tension control roller, and a drive means. A torque motor that moves the tension control roller by winding the wire connected to the wire, and a position detection means that detects the position of the tension control roller. Thus, the tension of the film can be kept constant by the tension control means having a simple configuration.

  According to the present invention, the film can be fed out while maintaining a constant tension.

It is a schematic block diagram of the film conveying apparatus which concerns on embodiment of this invention. It is a top view of the tension control apparatus of the film conveyance apparatus which concerns on embodiment of this invention. It is sectional drawing along the III-III line | wire shown in FIG. It is a figure which shows the winding roller of a wire. It is a schematic block diagram which shows the conventional tension control apparatus. It is a schematic block diagram which shows the tension control apparatus which concerns on embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

  With reference to FIGS. 1-4, the film conveying apparatus which concerns on embodiment of this invention is demonstrated in detail. FIG. 1 is a schematic configuration diagram of a film transport apparatus 100 according to an embodiment of the present invention. FIG. 2 is a top view of the tension controller 100B of the film transport apparatus 100 according to the embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. FIG. 4 is a view showing a wire winding roller.

  The film transport apparatus 100 is an apparatus that can form a ceramic green sheet used in a laminated ceramic component or the like on a film and wind the film. As shown in FIG. 1, the roll-shaped film F is fed out from a rotating supply reel 100A. The film F fed from the feed reel 100A is adjusted in tension in the traveling direction by the tension control device 100B, and is adjusted in the width direction by the tension distribution correcting device 100C. Thereafter, the ceramic paste is applied to the surface of the film F by the coating apparatus 100F while being guided by the guide roller 100E. After being applied, the film F is conveyed by the suction roller 100G and dried by the drying device 100H. When the ceramic paste is dried by the drying device, the film F is subjected to meandering correction by the grip roller 100J while being guided by the guide roller 100I. After the meandering correction is performed, the film F is taken up by the take-up reel 100L while being guided by the guide roller 100K. The thickness of the film F to be conveyed is 30 to 50 μm. According to the present invention, in particular, a thin film can be conveyed with low tension.

  A tension control device (tension control means) 100B and a tension distribution correction device are provided between a supply reel 100A around which the film is wound and a suction roller (drive roller) 100G that pulls out the film F from the supply reel 100A by rotational driving. 100C, a guide roller E, and a coating apparatus 100F are disposed. Among these devices, the tension control device 100B is disposed at the most upstream side, that is, at a position closest to the supply reel 100A. With such an arrangement, the tension control device 100B can adjust the tension immediately after the film F is fed from the feeding reel 100A. Thereby, the film F can pass through each apparatus in the state in which tension | tensile_strength was adjusted. In the present embodiment, the tension control device 100B is disposed below the supply reel 100A.

  2 and 3, the tension control device 100B moves the tension control roller 1 that controls the tension of the film F, the guide device (guide means) 2 that guides the tension control roller 1, and the tension control roller 1. A torque motor (driving means) 3, a take-up roller 6 for winding the wire 4 connected to the tension control roller 1, and a potentiometer 7 for detecting the position of the tension control roller 1 are provided.

  The tension control roller 1 has a rotation shaft 8 parallel to the rotation shaft of the supply reel 100A. The tension control roller 1 can rotate around the rotation shaft 8. The tension control roller 1 guides the film F to the downstream apparatus by causing the film F fed from the feeding reel 100A to wrap around while contacting the outer peripheral surface 1a. Accordingly, the film F fed out from the feeding reel 100A is conveyed from above to below as indicated by D1 in FIG. Further, the height of the lower end of the roller of the tension distribution correction device 100C, which is a device disposed on the downstream side of the tension control roller 1, is the same as the height of the lower end of the tension control roller 1 (see FIG. 1). . Accordingly, the film F that has wrapped around the outer peripheral surface 1a of the tension control roller 1 is conveyed in the horizontal direction as indicated by D2 in FIG. In the following description, the traveling direction of the film F between the feeding reel 100A and the tension control roller 1 is referred to as “feeding direction D1”. Further, the traveling direction of the film F on the downstream side of the tension control roller 1 is referred to as a “conveying direction D2”.

  The tension control roller 1 can move in a direction intersecting with the feeding direction D1. In this embodiment, the tension control roller 1 can be moved in the horizontal direction by being guided by the guide device 2. Further, the moving direction of the tension control roller 1 and the transport direction D2 of the film F are parallel to each other.

  The guide device 2 that guides the tension control roller 1 includes a pair of slide shafts 11 and 12 that extend along the moving direction of the tension control roller 1, support members 13 and 14 that support the slide shafts 11 and 12, and a tension control roller. 1 is provided with ball slides 16 and 17 that move together. The support members 13 and 14 are arranged so as to extend along the axial direction of the tension control roller 1. The support member 13 and the support member 14 are spaced apart from each other so as to face the moving direction of the tension control roller 1. The support member 13 and the support member 14 respectively define the moving end of the tension control roller 1. One ends of the support members 13 and 14 are fixed to a support wall W that supports the entire tension control device 100B. The slide shafts 11 and 12 extend in the horizontal direction between the support member 13 and the support member 14 on both ends of the tension control roller 1. The slide shafts 11 and 12 have one end fixed to the support member 13 and the other end fixed to the support member 14. The slide shaft 11 is disposed at a position separated from the support wall W. The slide shaft 12 is disposed on the free end side of the support members 13 and 14. The ball slide 16 moves along the slide shaft 11, and the ball slide 17 moves along the slide shaft 12. The ball slides 16 and 17 are connected to respective end portions of the rotation shaft 8 of the tension control roller 1. Specifically, a flange 16a is formed on the upper surface of the ball slide 16, and one end of the rotating shaft 8 is fixed to the flange 16a. Further, a flange 17a is formed on the upper surface of the ball slide 17, and the other end of the rotating shaft 8 is fixed to the flange 17a. As a result, the tension control roller 1 can move along the slide shafts 11 and 12 as the ball slides 16 and 17 move.

  The torque motor 3 can move the tension control roller 1 by rotating the winding roller 6 attached to the end of the motor shaft to wind or unwind the wire 4. The torque motor 3 is attached to the back surface side of the support wall W, and only the shaft portion 3a protrudes to the front surface side. The torque motor 3 can move the tension control roller 1 in the transport direction D2 by rewinding the wire 4. Moreover, the torque motor 3 can move the tension control roller 1 to D3 which is the direction opposite to the conveyance direction D2 by winding the wire 4. Since the tension control roller 1 rotates while guiding the film F conveyed from the feeding direction D1 toward the conveyance direction D2, the tension control roller 1 receives a force from the film F toward the conveyance direction D2. The torque motor 3 supports the tension control roller 1 against this force. That is, the torque motor 3 can apply an urging force to the film F in the direction D <b> 3 via the tension control roller 1. When the torque motor 3 pulls the tension control roller 1 to apply a biasing force to the film F in the direction D3, a force acts on the film F in the direction pulled out from the supply reel 100A. Therefore, the direction D3 corresponds to the “direction of pulling out the film from the feeding reel” in the claims.

  Further, the torque motor 3 can apply a constant urging force to the film F. That is, the torque motor 3 is controlled so that the force (equal to the tension of the wire 4) received by the tension control roller 1 from the film F is kept constant. Specifically, the torque motor 3 maintains the position of the tension control roller 1 when the tension of the wire 4 is constant. When the tension of the wire 4 increases, the torque motor 3 rewinds the wire 4 and moves the tension control roller 1 in the transport direction D2. In this embodiment, when the diameter of the film roll wound around the supply reel 100A is reduced and the force received from the film F is increased (see, for example, FIGS. 5 and 6), the torque motor 3 rewinds the wire 4. Can do. Alternatively, when the tension is locally increased due to the influence of the eccentricity of the film roll, the torque motor 3 can locally rewind the wire 4. On the other hand, when the tension of the wire 4 decreases, the torque motor 3 winds the wire 4 and moves the tension control roller 1 in the direction D3. In the present embodiment, when the tension is locally reduced due to the influence of the eccentricity of the film roll, the torque motor 3 can locally wind the wire 4.

  The winding roller 6 is a cylindrical member attached to the tip of the shaft portion 3 a of the torque motor 3. An insertion hole is formed in the winding roller 6 along the rotation axis. A key groove is formed in the insertion hole, and a key formed in the shaft portion 3a of the torque motor 3 is inserted into the key groove. As shown in FIG. 4, the winding roller 6 includes a cylindrical winding portion 6 a for winding the wire 4 on the outer peripheral surface and a hook 6 b for fixing the end portion of the wire 4. A spiral groove 6c for accommodating a wire is formed on the outer peripheral surface of the winding portion 6a. The groove 6c is formed in a size that accommodates one wire 4. Therefore, the wire 4 is wound up and rewound along the groove 6c without overlapping at the time of winding. The hook 6b protrudes at the edge on the torque motor 3 side on the outer peripheral surface of the winding portion 6a. The end of the wire 4 is hooked on the hook 6b.

  The potentiometer 7 is a stroke position detection sensor. The potentiometer 7 includes a cylinder 7 a fixed to the support wall W and a rod 7 b that moves forward and backward according to the movement of the tension control roller 1. The end of the rod 7 b is fixed to a ball slide 16 that supports the tension control roller 1. The potentiometer 7 outputs the detected information to a control unit (not shown) of the film transport apparatus 100.

  Next, with reference to FIG.5 and FIG.6, the effect | action and effect of the film conveying apparatus 100 which concern on this embodiment are demonstrated.

  First, a conventional film transport apparatus 100 will be described for comparison. The conventional film transport device FD adjusts the film feed amount and tension by controlling the rotational speed of the feeding reel FD100 and a driving roller (not shown). A guide roll FD200 that cannot move is disposed on the downstream side of the supply reel FD100. The diameter of the film roll wound around the supply reel FD100 decreases as the supply amount increases. Therefore, the film fed out by the feeding reel FD100 is set to F1 indicated by a solid line in FIG. 5 in the initial conveyance state, and becomes a position F2 indicated by a one-dotted line in FIG. 5 with the passage of time. When the position of the film is F2, the tension acting on the film is larger than that in the case of F1. When the tension of the film is adjusted only by the rotation speeds of the feeding reel FD100 and the driving roller, the control calculation load of the apparatus becomes large. Furthermore, the position of the film may fluctuate locally as indicated by F3 in FIG. 5 due to the influence of the eccentricity of the film roll wound around the supply reel FD100. As a result, the tension of the film varies. The conventional film transport device FD cannot be controlled in consideration of the tension fluctuation due to the eccentricity of the film roll. Even if tension variation is taken into consideration, the load of control calculation becomes very large. When the film is transported at a low tension, fluctuations in tension due to the eccentricity of the film roll have had a great effect on the film transport.

  On the other hand, in the film transport apparatus 100 according to the embodiment of the present invention, the tension control apparatus 100B that controls the tension of the film F includes the tension control roller 1 and the torque motor 3. The tension control roller 1 can change the direction of the film F from the feeding direction D1 to the conveying direction D2 by coming into contact with the fed film F. Further, since the tension control roller 1 is movable in a direction intersecting with the feeding direction of the film F, the tension acting on the film F can be changed by changing the position. Therefore, the tension control roller 1 can adjust the tension of the film F by moving to an appropriate position. On the other hand, the torque motor 3 can apply a biasing force to the film F through the tension control roller 1 in the direction D3 in which the film F is drawn from the supply reel 100A. That is, the torque motor 3 can move the tension control roller 1 to an appropriate position while maintaining the film F being conveyed by the tension control roller 1, or can maintain an appropriate position. In the film transport apparatus 100 according to the present embodiment, the torque motor 3 can apply a constant urging force to the film F via the tension control roller 1. Accordingly, the torque motor 3 can adjust the position of the tension control roller 1 so that the force received by the tension control roller 1 from the film F, that is, the tension of the film F is kept constant. When the film tension is increased by decreasing the diameter of the film roll wound around the supply reel 100A, the torque motor 3 rewinds the wire 4 and moves the tension control roller 1 in the transport direction D2. The film fed out by the feeding reel 100A is F1 indicated by a solid line in FIG. 6 in the initial conveyance state, and becomes a position F2 indicated by a dashed line in FIG. 6 as time passes. At this time, as can be seen from the fact that F1 and F2 are parallel, the tension control roller 1 moves as the diameter of the film roll decreases, so the angle between the film F and the tension control roller 1 is It becomes constant. Therefore, the tension of the film F is kept constant. Further, the position of the film may fluctuate locally as indicated by F3 in FIG. 6 due to the influence of the eccentricity of the film roll wound around the supply reel 100A. Also in such a case, the torque motor 3 can cancel the tension fluctuation of the film F by moving the tension control roller 1 locally. Furthermore, since the tension control device 100B can control the tension of the film F with a simple configuration and operation, the calculation load for controlling the feeding reel 100A and the suction roller 100G can be greatly reduced. As described above, the film F can be fed out while maintaining a constant tension.

  Further, in the film transport apparatus 100 according to the present embodiment, the film F transported to the downstream side of the tension control roller 1 can move in parallel with the moving direction of the tension control roller 1. Thereby, the boundary position between the film F on the downstream side and the tension control roller 1 is constant regardless of the movement of the tension control roller 1 (in this embodiment, the lower end position of the tension control roller 1). Thereby, the tension of the film F is kept constant.

  Further, in the film transport apparatus 100 according to the present embodiment, the winding roller 6 is formed with a spiral groove 6 c that accommodates the wire 4. Thereby, the wire 4 used for the movement of the tension control roller 1 is accommodated in the spiral groove 6c at the time of winding. Accordingly, it is possible to prevent the wires 4 from overlapping each other at the time of winding, so that it is possible to prevent a winding mark from remaining on the wire 4. Furthermore, since the wire 4 is wound up and rewound along the spiral groove 6c, the tension control roller 1 can move smoothly. Moreover, since the wire 4 is accommodated in the spiral groove 6c, the winding diameter and the unwinding diameter of the wire 4 can be kept constant. Therefore, the urging force of the tension control roller 1 against the film F is kept constant.

  The present invention is not limited to the embodiment described above.

  For example, in the above-described embodiment, the tension control roller 1 is movable in the horizontal direction. However, the moving direction of the tension control roller 1 may be any direction as long as it intersects with the feeding direction D1 of the film F. Further, the moving direction of the tension control roller 1 and the transport direction D2 of the film F were parallel. However, it does not have to be parallel.

  DESCRIPTION OF SYMBOLS 1 ... Tension control roller, 2 ... Guide apparatus (guide means), 3 ... Torque motor (drive means), 4 ... Wire, 6 ... Winding roller, 6c ... Groove, 7 ... Potentiometer (position detection means), 100 ... Film conveying device, 100A ... Feeding reel, 100B ... Tension control device (tension control means), 100G ... Suction roller (drive roller), F ... Film.

Claims (4)

A feeding reel for feeding out the film wound in a roll;
A driving roller for pulling out the film from the feeding reel by rotational driving;
A tension control means that is disposed between the feeding reel and the driving roller and controls the tension of the film;
The tension control means includes
A tension control roller that is arranged on the most upstream side between the feeding reel and the driving roller and is movable in a direction crossing the feeding direction of the film from the feeding reel;
Driving means for urging the tension control roller to the film,
The driving means applies a constant urging force to the film in the direction of pulling out the film from the feeding reel via the tension control roller ,
The tension control roller moves in a horizontal direction;
When the diameter of the roll of the film wound on the supply reel is large, the film from the supply reel to the tension control roller and the tension control from the supply reel when the diameter of the roll of film is small A film transporting device, characterized in that the film to the roller is parallel . The film conveyed downstream from the tension control roller is
The film transport apparatus according to claim 1, wherein the film transport apparatus is transported in parallel with a moving direction of the tension control roller. The driving means is constituted by a torque motor and a winding roller attached to the rotating shaft thereof,
The tension control roller and the driving means are connected via a wire,
The drive means moves the tension control roller by winding or rewinding the wire with the winding roller,
The film conveying apparatus according to claim 1, wherein the winding roller is formed with a spiral groove that accommodates the wire. The tension control means includes
Extending in the moving direction of the tension control roller and guiding means for guiding the tension control roller;
A torque motor that constitutes the driving means and moves the tension control roller by winding or rewinding a wire connected to the tension control roller;
The film conveying apparatus according to claim 1, further comprising a position detecting unit that detects a position of the tension control roller.

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