JP2014136623A - Belt-like-sheet conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt-like-sheet conveying device which can send a wide belt-like-sheet while clamping with a nip roller device such that wrinkles and the like do not occur, and moreover even if the belt-like-sheet is exchanged to that of different thickness, adjustment of the driving speed of a sending roller included in the nip roller device is not required.SOLUTION: A nip roller device 3, while winding a belt-like sheet S for only a predetermined rotation angle around a sending roller 1 to be driven, sends the same by clamping with a sending roller 1 and a pressing roller 2 to be driven rotated. Making the radius r01 of the perimeter surface of the sending roller 1 same size as the radii r04 and r05 of the perimeter surface of a guiding roller to be driven, and the sending roller 1 and the guiding rollers 4 and 5 are rotationally driven such that peripheral speeds v01, v04, and v05 on each perimeter surface become the same mutually. The nip roller device 3 includes a backup roller 7 which resists against the pressing force of the pressing roller 2 so as to support the sending roller 1.

Description

  The present invention relates to a belt-like sheet conveying device for conveying a belt-like sheet such as a plastic film or paper to a processing or processing step, and in particular, a nip roller device that feeds a belt-like sheet while pressing the belt-like sheet, and at least a feed from the nip roller device. The present invention relates to a belt-like sheet conveying device provided with a driven guide roller for picking up the belt-like sheet, or a driven guide roller for feeding the belt-like sheet to the nip roller device.

  2. Description of the Related Art Conventionally, a nip roller device in a belt-like sheet conveying device has a driven feed roller and a pressure roller that can be pressed against the feed roller, and is generally used when it is necessary to reliably feed the belt-like sheet without slipping. Moreover, it may be used for stacking and laminating two belt-like sheets. Each of the feed roller and the guide roller is rotatably supported at both ends, and feeds the belt-like sheet in a state of being wound around each outer peripheral surface by a predetermined rotation angle. Further, when the belt-like sheet is conveyed, the feed roller and the driven guide roller are rotationally driven by the motors common to them so that their peripheral speeds are equal to each other via the transmission. The pressure roller is supported at both ends in a freely rotatable manner. By pressing the belt-like sheet on the outer circumferential surface of the feed roller with the outer circumferential surface thereof, the belt-like sheet is sandwiched between the feed roller and driven by the rotation of the feed roller. And can be rotated.

  However, recently, a belt-like sheet to be processed or processed has become wider, and accordingly, it is necessary to lengthen the guide roller, the feed roller of the nip roller device, and the pressure roller. The thickness of each belt-like sheet is also diversified. For example, in a winding device or the like, it may be necessary to wind a belt-like sheet having a thickness of several microns from a belt-like sheet having a thickness of about 1 millimeter. Therefore, it is required to convey a plurality of types of belt-like sheets having greatly different thicknesses in the belt-like sheet conveyance device.

  Therefore, if the length of the outer peripheral surface of the feed roller or the like is increased, the rollers are easily bent. Therefore, in order to suppress the increase in the deflection of the feed roller or the like, conventionally, the radius of the roller outer peripheral surface is increased to cope with it. ing. In particular, in the nip roller device, if the feed roller is greatly deflected, the belt sheet is not uniformly pressed across the entire width, which causes wrinkles and the like in the belt sheet. Therefore, the feed roller must be made as small as possible. Don't be. Moreover, since the feed roller receives the pressing force of the pressing roller, the amount of bending thereof is greater than that of the other guide rollers. Therefore, it is necessary to make the radius of the outer peripheral surface of the feed roller larger than the radius of the outer peripheral surface of another guide roller.

  However, if the radius of the outer peripheral surface of the feed roller is larger than the radius of the outer peripheral surface of the other guide roller, the belt-like sheet may sag and meander between the feed roller and the guide roller according to the thickness of the belt-like sheet to be conveyed. If the belt-like sheet is excessively tensioned, the belt-like sheet may be wrinkled or permanently deformed. That is, when the belt-like sheet is thin, even if the belt-like sheet travels with appropriate tension between the nip roller device and the front and rear driven guide rollers, the belt-like sheet is replaced with a thicker one. In this case, the belt-like sheet is slackened on the upstream side of the nip roller device, and excessively tensioned on the downstream side of the nip roller device. Further, when the belt-like sheet is thick, the peripheral speeds of the feed roller and the guide roller are set so that the belt-like sheet travels with an appropriate tension between the nip roller device and the front and rear driven guide rollers. However, when the belt-like sheet is replaced with a thin one, there is a symptom that the belt-like sheet is excessively tensioned on the upstream side of the nip roller device and is loosened on the downstream side of the nip roller device. In particular, in the nip roller device, since the belt-like sheet is pressed against the feed roller by the pressing roller, the frictional force between the belt-like sheet and the feed roller increases, and it becomes difficult to slip against the feed roller. The adverse effect of the difference between the running speed of the belt-like sheet and the running speed of the belt-like sheet on the driven guide roller is likely to appear significantly.

  In order to solve this problem, the transmission that transmits the rotation of the motor to the feed roller should include a continuously variable transmission capable of fine shifting, and the drive speed of the feed roller depends on the thickness of the belt-like sheet. However, the operation of adjusting the driving speed of the feed roller by operating the continuous transmission every time the thickness of the belt-like sheet changes is time consuming and troublesome. And the transmission device between the feed rollers becomes complicated.

JP 59-114251 A

  In view of the above-described problems, the present invention can feed a wide belt-like sheet so as not to be wrinkled while being clamped by a nip roller device, and even if the belt-like sheet is replaced with one having a different thickness. Accordingly, an object of the present invention is to obtain a belt-like sheet conveying device that does not require adjustment of the driving speed of the feed roller included in the nip roller device.

  Therefore, the present invention includes a driven feed roller and a pressure roller that can be pressed against the feed roller and can be driven to rotate. The belt-like sheet is wound around the feed roller by a predetermined rotation angle, and the feed roller and the press roller are wound. A belt-like sheet comprising: a nip roller device that can be fed while being pinched by a roller; and at least a driven guide roller that pulls the belt-like sheet from the nip roller device, or a driven guide roller that sends the belt-like sheet to the nip roller device In the conveying device, the radius of the outer peripheral surface of the feed roller is made equal to the radius of the outer peripheral surface of the driven guide roller, and the peripheral speeds of the feed roller and the guide roller on the outer peripheral surface are the same. The nip roller device is driven against the pressing force of the pressing roller. Characterized in that it comprises a backup roller for supporting the La.

  According to the present invention, the radius of the outer peripheral surface of the driven feed roller is made the same as the radius of the outer peripheral surface of the driven guide roller, and the peripheral speeds of the feed roller and guide roller on each outer peripheral surface are mutually equal. Even if the length of the feed roller is increased in accordance with the widening of the belt-like sheet, by rotationally driving to be the same, and by providing a backup roller that supports the feed roller against the pressing force by the pressure roller, The flexure can be kept small without increasing the radius of the feed roller, and the running speed of the belt-like sheet on the feed roller increases or decreases according to the thickness of the belt-like sheet with respect to the running speed of the belt-like sheet on the guide roller. You can avoid it. Therefore, even if it is a wide belt-like sheet, it can be fed so as not to be wrinkled while being sandwiched by the nip roller device, and even if the belt-like sheet to be transported is replaced with one having a different thickness, the nip roller device accordingly Thus, it is possible to obtain a belt-like sheet conveying device that does not require adjustment of the driving speed of the feed roller.

  Further, the belt-like sheet conveying device presses the feeding roller and the press in a state where the first belt-like sheet fed from the driven guide roller and the second belt-like sheet supplied on the first belt-like sheet are overlapped with each other. Even if it is equipped with a nip roller device that feeds while being pinched and bonded with a roller, it is equipped with a control mechanism that controls the tension of the second belt-like sheet supplied to the nip roller device, and the outer peripheral surface of the feed roller The radius is the same as the radius of the outer peripheral surface of the guide roller, the feed roller and the guide roller are driven to rotate so that the peripheral speeds on the outer peripheral surfaces are the same; By providing a backup roller that supports the feeding roller against the pressing force of the pressing roller, the wide first belt-like sheet and the wide second belt-like sheet Even if the first belt-like sheet or the second belt-like sheet is replaced with one having a different thickness, the driving speed of the feed roller included in the nip roller device can be set to the first speed. It is not necessary to adjust according to the thickness of the belt-like sheet or the thickness of the second belt-like sheet.

FIG. 1 is an explanatory view of a sheet conveying apparatus according to an embodiment of the present invention. FIG. 2 is a rotation drive system diagram of the belt-like sheet conveying apparatus shown in FIG. It is a schematic diagram for demonstrating the travel speed of a strip | belt-shaped sheet | seat. FIG. 4 is an explanatory diagram of a sheet conveying apparatus according to another embodiment of the present invention.

  An embodiment of the belt-like sheet conveying apparatus according to the present invention will be described with reference to FIGS. The belt-like sheet conveying apparatus has a driven feed roller 1 and a pressure roller 2 that can be pressed against the feed roller 1 and can be driven and rotated. The belt-like sheet S is wound around the feed roller 1 by a predetermined rotation angle. A nip roller device 3 that can be fed while being pressed between the feed roller 1 and the pressure roller 2, a driven guide roller 4 that sends the belt-like sheet S to the nip roller device 3, and a belt-like sheet S sent from the nip roller device 3 And a driven guide roller 5 to be pulled. The feed roller 1, the upstream guide roller 4 and the downstream guide roller 5 are disposed at fixed positions. The pressure roller 2 pushes and pulls the bearings at both ends simultaneously by the fluid pressure cylinder device 6 to feed the feed roller. 1 can be pressed or separated from the feed roller 1. In this embodiment, the belt-like sheet S supplied to the guide roller 4 is a single plastic film and is rewound from a raw roll (not shown). Then, the belt-like sheet S taken up by the guide roller 5 is supplied to a strip-winding process of the belt-like sheet (not shown).

  The nip roller device 3 includes a backup roller 7 that supports the feed roller 1 against the pressing force of the pressing roller 2. In this embodiment, the body of the feed roller 1 is formed by plating the outer peripheral surface of the steel pipe, and the body of the pressing roller 2 and the body of the backup roller 7 are each lined with rubber on the outer periphery of the steel pipe. It is formed. The outer peripheral surface of the backup roller 7 is in contact with the outer peripheral surface of the feed roller 1 with a predetermined pressing force.

  As shown in FIG. 2, in order to rotationally drive the feed roller 1 and the guide roller 4 and the guide roller 5, the common motor M and the feed roller 1, the guide roller 4, and the guide roller 5 are respectively connected to the transmission devices 8 and 9. 10 are connected. Since the reduction gear ratios of the transmissions 8, 9, and 10 are set to the same value, the motor M causes the feed rollers 1, the guide rollers 4, and the guide rollers 5 to have the same peripheral speed on the outer peripheral surface. It can be driven to rotate. The motor M and the backup roller 7 are also connected by the transmission device 11, and the back roller 6 is rotationally driven so that the peripheral speed thereof is the same as the peripheral speed of the feed roller 1. The pressing roller 2 is freely rotatable, and rotates following the rotation of the feeding roller 1 when pressed on the belt-like sheet on the feeding roller 1. The arrows in FIG. 1 indicate the rotation direction of each roller during conveyance of the belt-like sheet.

  FIG. 3 is a view for explaining the relationship between the belt sheet traveling speed during the belt sheet conveyance in the belt sheet conveying apparatus shown in FIG. 1, the radius and the rotational speed of each of the feeding roller and the guide roller, and the thickness of the belt sheet. It is a schematic diagram. In this belt-like sheet conveying apparatus, the radius r01 of the outer peripheral surface of the feed roller 1 is the same as the radius r04 of the outer peripheral surface of the guide roller 4 and the radius r05 of the outer peripheral surface of the guide roller 5.

  The thickness of the belt-like sheet S is t, the rotational speed of the feed roller 1 is n1, the peripheral speed on the outer peripheral surface of the feed roller 1 is v01, the rotational speed of the guide roller 4 is n4, and the peripheral speed on the outer peripheral surface of the guide roller 4 is Assuming v04, the relational expression v1 = 2π · n1 · (r01 + t / 2) holds for the traveling speed v1 of the belt-like sheet S on the feed roller 1. For the traveling speed v4 of the belt-like sheet S on the guide roller 4, the relational expression of v4 = 2π · n4 · (r04 + t / 2) is established. The difference between the traveling speed v1 of the belt-like sheet S on the feed roller 1 and the traveling speed v4 of the belt-like sheet S on the guide roller 4 is v1−v4 = 2π · r01 · n1-2π · r04 · n4 + 2π · n1 · t / 2-2π · n4 · t / 2.

  The peripheral speed v01 of the outer peripheral surface of the feed roller 1 is 2π · r01 · n1, and the peripheral speed v04 of the outer peripheral surface of the guide roller 4 is 2π · r04 · n4. In this belt-like sheet conveying apparatus, the feed roller 1 and the guide roller 4 Are rotated so that the peripheral speeds v01 and v04 of the outer peripheral surfaces are the same, v01 = v04, n4 / n1 = r01 / r04, and v1-v4 = π · n1 · t · (1-r01 / r04).

  Assuming that the radius r01 of the feed roller 1 is larger than the radius r04 of the guide roller 4, v1−v4 is a negative value, v1 is smaller than v4, and the belt sheet travel speed difference v1−v4. Is proportional to the thickness t of the belt-like sheet. Therefore, as the thickness t of the belt-like sheet S increases, the difference between the running speed v1 of the belt-like sheet S on the feed roller 1 and the running speed v4 of the belt-like sheet S on the guide roller 4 increases. Tension is reduced. Therefore, on the basis of the case where the belt-like sheet S is thick, the traveling speed v1 of the belt-like sheet S on the feed roller 1 is set by setting the rotational speed of the feed roller n1 slightly in the transmission device 8; The rotational speed n1 of the feed roller 1 and the rotational speed n4 of the guide roller 4 can be set so that the difference from the traveling speed v4 of the belt-like sheet S on the guide roller 4 is appropriate. When S is changed to a thin one, the tension of the belt-like sheet S increases.

  However, in the belt-like sheet conveying apparatus shown in FIG. 3, the radius r01 of the feed roller 1 and the radius r04 of the upstream guide roller 4 are equal to each other as described above, so that the relational expression v1-v4 = π · n1 · t described above. In (1-r01 / r04), r01 / r04 = 1 and v1-v4 = 0. That is, the traveling speed v1 of the belt-like sheet S on the feed roller 1 and the traveling speed v4 on the guide roller 4 are equal, and are independent of the thickness t of the belt-like sheet S.

  Further, assuming that the radius of the outer peripheral surface of the guide roller 5 is r05, the rotational speed of the guide roller 5 is n5, and the peripheral speed on the outer peripheral surface of the guide roller 5 is v05, the belt-like sheet running speed v1 on the feed roller 1 and the guide roller Similarly to the relationship between v1 and v4, v1−v5 = n1 · t · (1−r01 / r05) holds and r01 = r05 between the traveling speed v5 of the belt-like sheet S on 5 and v5. The travel speed v1 of the belt-like sheet S on the feed roller 1 on the feed roller 1 is equal to the travel speed v5 of the belt-like sheet S on the guide roller 5 and is independent of the thickness t of the belt-like sheet S.

  Therefore, in this belt-like sheet conveying apparatus, even if the belt-like sheet S is changed to another one, there is no need to adjust the rotational speed of the feed roller according to the thickness of the belt-like sheet.

  In the present invention, if necessary, for example, the belt-like sheet may be taken directly from the raw fabric roll by the nip roller device without passing the driven guide roller, or the belt-like sheet fed from the nip roller device may be driven. You may take over with the winding axis | shaft driven rotationally without a guide roller. In other words, the driven guide roller 4 that sends the belt-like sheet S to the nip roller device 3 and the driven guide roller 5 that picks up the belt-like sheet S sent from the nip roller device 3 may not be provided. obtain.

  FIG. 4 shows another embodiment of the belt-like sheet conveying apparatus of the present invention. The belt-like sheet conveying device has a driven feed roller 1 and a pressure roller 2 that can be pressed against the feed roller 1 and can be driven to rotate, and winds the first belt-like sheet S1 around the feed roller 1 by a predetermined rotation angle. At the same time, the first belt-like sheet S1 and the second belt-like sheet S2 supplied on the first belt-like sheet S1 are overlapped with each other while being fed between the feeding roller 1 and the pressure roller 2 and bonded together. A nip roller device 3 capable of performing the above operation, a driven guide roller 4 for feeding the first belt-like sheet S1 to the nip roller device 3, and the first belt-like sheet S1 and the second belt-like sheet S2 fed from the nip roller device 3. And a driven guide roller 5 for picking up the laminated belt-like sheet S. The first belt-like sheet S1 is, for example, a plastic film, and the second belt-like sheet S2 is, for example, a protective plastic film in which an adhesive is applied to the back surface.

  The second belt-like sheet S2 is supplied from the raw roll R0. The raw roll R0 is formed by winding the second belt-like sheet S2 around the core 12, and in the nip roller device 3, the second belt-like sheet S2 is fed together with the first belt-like sheet S1 and the feed roller 1 and the pressure roller. The second belt-like sheet S2 is rewound from the original roll R0 by rotationally driving the feed roller 1 while being sandwiched between the two.

  In this belt-like sheet conveying apparatus, a control mechanism 13 for controlling the tension of the second belt-like sheet S2 supplied to the nip roller device 3 is provided, and the radius and guide of the outer peripheral surface of the feed roller 1 are provided as in the above-described embodiment. The radius of the outer peripheral surface of the roller 4 and the radius of the outer peripheral surface of the guide roller 5 are made the same, respectively, and the peripheral speed on the outer peripheral surface of the feed roller 1, the peripheral speed on the outer peripheral surface of the guide roller 4, and the guide roller 5 It can be driven to rotate so that the peripheral speeds on the outer peripheral surface are the same.

  In this embodiment, the control mechanism 13 includes a brake 14 connected to the core 12 and capable of adjusting the braking torque, and a tension detecting roller 15 rotatably supported for guiding the second belt-like sheet S2 to the nip roller device 3. The tension detecting device 16 for detecting the tension of the second belt-like sheet S2 based on the load acting on the tension, the detection value by the tension detecting device 16, and the set value of the required tension of the second belt-like sheet S2 set in the setting unit 17 And the unwinding tension control device 18 capable of controlling the braking torque of the brake 14 so that the tension of the second belt-like sheet S2 becomes a set value. The setting unit 17 sets the tension value of the second belt-like sheet S2 to an appropriate tension that does not cause a large distortion or wrinkle after bonding according to the thickness or material of the first belt-like sheet S1 or the second belt-like sheet. It can be changed to become. When the control mechanism 13 rewinds the second belt-like sheet S2 from the original roll with the driven guide roller and sends it to the nip roller device 3, the control mechanism 13 determines the driving speed of the guide roller and the feed roller 1 with the guide roller. It may be controlled based on the detected value and the set value of the tension by the tension detecting device provided between them, and a dancer roller is provided instead of the tension detecting roller, and the dancer roller is based on the amount of displacement from the reference position. It may be configured to control the driving speed of the guide roller.

S belt-like sheet S1 first belt-like sheet S2 second belt-like sheet 1 feed roller 2 pressure roller 3 nip roller device 4 driven guide roller 5 driven guide roller 6 fluid pressure cylinder device 7 backup roller 8, 9, 10, 11 Transmission 13 Control mechanism

Claims (2)

  It has a driven feed roller and a pressure roller that can be pressed against the feed roller and can be driven to rotate. The belt-like sheet is wound around the feed roller by a predetermined rotation angle and is pressed between the feed roller and the pressure roller. In the belt-like sheet conveying apparatus, comprising: a nip roller device capable of feeding; and at least a driven guide roller that pulls the belt-like sheet from the nip roller device, or a driven guide roller that feeds the belt-like sheet to the nip roller device. The radius of the outer peripheral surface of the roller is made the same as the radius of the outer peripheral surface of the driven guide roller, and the feed roller and the guide roller are rotationally driven so that the peripheral speeds on the outer peripheral surfaces are the same. And the nip roller device supports the feed roller against the pressing force of the pressing roller. Conveying apparatus of the belt-like sheet characterized in that it comprises a Ppurora.   A driven feed roller and a pressure roller that can be pressed against and driven by the feed roller, the first belt-like sheet is wound around the feed roller by a predetermined rotation angle, and the first belt-like sheet and the A nip roller device that can feed the second belt sheet supplied on the first belt sheet while being laminated with the feeding roller and the pressing roller while being laminated, and the nip roller device. A driven guide roller that feeds one belt-like sheet, and a driven guide roller that pulls out a bonded belt-like sheet composed of the first belt-like sheet and the second belt-like sheet fed from the nip roller device. A belt-like sheet conveying device comprising: a control mechanism for controlling a tension of the second belt-like sheet supplied to the nip roller device; and The outer peripheral surface of the guide roller is set to have the same radius as the outer peripheral surface of the guide roller, and the feed roller and the guide roller are rotationally driven so that the peripheral speeds on the outer peripheral surfaces are the same. The nip roller device includes a back-up roller that supports the feeding roller against a pressing force by the pressing roller.

Images