JP6588752B2 - Belt driving device, sheet conveying device including belt driving device, sheet conveying method using the conveying device, sheet processing device, and sheet processing method using the processing device - Google Patents

Description

  The present invention relates to a belt driving device, a sheet conveying device that conveys a sheet including the belt driving device, and a sheet conveying method using the conveying device. The present invention also relates to a sheet processing apparatus for processing a sheet and a sheet processing method using the processing apparatus.

  In general, it is known that when a belt-like body such as a belt is conveyed, for example, if the tension in the width direction of the belt-like body changes, the belt-like body will meander. The tension in the width direction of the belt-like body is easily affected by the installation accuracy of the equipment or the processing accuracy of the equipment, and it is actually very difficult to keep the tension constant.

  In Patent Document 1, there is an improved self-aligning pulley configuration in which the pulley body rotates in the direction of correcting the meandering and the deviation around the pivot axis when the meandering and the deviation of the belt occur. It is disclosed.

  Further, in Patent Document 2, in order to prevent the belt from meandering, a belt drive control in which a steering roll for applying the belt is swung by a stepping motor driven based on a signal obtained from the coordinate position of the end of the belt. An apparatus is disclosed.

JP 2011-236943 A JP-A-8-217302

  However, Patent Document 1 only details the configuration of the self-aligning pulley, and does not specifically describe the type of roll required as a driven roll driven by a drive roll. Further, Patent Document 1 does not specifically describe the arrangement relationship between the driving roll and a fixed roll among the driven rolls driven by the driving roll.

  In addition, since the belt drive control device described in Patent Document 2 obtains a signal to be sent to the stepping motor by using an external calculation / control means, the belt drive control device becomes larger and more complicated, thereby improving the cost. I will invite you.

  Accordingly, it is an object of the present invention to provide a belt driving device that can eliminate the drawbacks of the above-described prior art, a sheet conveying device including the belt driving device, and a sheet conveying method using the conveying device. Another object of the present invention is to provide a sheet processing apparatus and a sheet processing method using the processing apparatus that can eliminate the above-described drawbacks of the prior art.

  The present invention is a belt driving device comprising a plurality of rolls and an endless belt wound around the plurality of rolls, wherein the belt rotates by rotating the roll and circulates the endless belt. Comprises at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll, and at least one of the plurality of driven rolls is in accordance with the tension in the width direction of the endless belt. And at least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt, At least one of the plurality of driven rolls is a tension roll for adjusting a tension of the endless belt, and the fixed roll is driven by the endless belt. There is provided a belt drive which is arranged at a position adjacent to the upstream side of Lumpur.

  Further, the present invention is a sheet conveying device that includes the belt driving device and conveys a belt-like sheet disposed on the endless belt, and the belt-like sheet is wound around the drive roll by the endless belt. The present invention provides a sheet conveying apparatus which is conveyed while being pressurized on a surface.

  Further, the present invention is a sheet processing apparatus that includes the belt driving device and performs processing on a belt-like sheet disposed on the endless belt, wherein the processing on the sheet includes a sheet press, a sheet Provided is a sheet processing apparatus that processes at least one of sealing between sheets and sheet cutting and processing the belt-shaped sheet in a state of being pressed onto the peripheral surface of the drive roll by the endless belt It is.

  The present invention also provides a sheet conveying method using the sheet conveying apparatus. That is, the present invention is a sheet conveying method comprising a conveying step of conveying a belt-like sheet arranged on an endless belt wound around a plurality of rolls, wherein the plurality of the plurality of sheets used in the conveying step are used. The roll is composed of at least one drive roll to be driven and a plurality of driven rolls driven by the drive roll, and at least one of the plurality of driven rolls has a tension in the width direction of the endless belt. Accordingly, at least one of the plurality of driven rolls is a self-aligning roll whose peripheral surface swings according to the tension in the width direction of the endless belt. At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt, and the fixed roll is connected to the drive roller via the endless belt. There is provided a method of transporting a sheet which is arranged at a position adjacent to the upstream side Le.

  Next, the present invention is a sheet conveying apparatus for conveying a belt-like sheet wound around a plurality of rolls, the plurality of rolls including at least one driving roll to be driven and the driving roll. A plurality of driven rolls to be driven, and at least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the belt-like sheet, At least one of the driven rolls is an automatic centering roll whose peripheral surface swings in accordance with the tension in the width direction of the belt-shaped sheet, and at least one of the plurality of driven rolls is A tension roll that adjusts the tension of the belt-like sheet, and the fixed roll carries a sheet disposed at a position adjacent to the upstream side of the drive roll via the belt-like sheet. There is provided an apparatus.

  The present invention also provides a sheet conveying method using the sheet conveying apparatus. That is, the present invention is a sheet conveying method including a conveying step of conveying a belt-like sheet wound around a plurality of rolls, wherein the plurality of rolls used in the conveying step are driven at least one. Each of the plurality of driven rolls, and at least one of the plurality of driven rolls has a peripheral surface that swings according to the tension in the width direction of the belt-shaped sheet. A fixed roll that does not move, and at least one of the plurality of driven rolls is a self-aligning roll whose peripheral surface swings according to a tension in a width direction of the belt-like sheet, At least one of the driven rolls is a tension roll that adjusts the tension of the belt-like sheet, and the fixed roll is located upstream of the drive roll via the belt-like sheet. Method of transporting arranged is in that sheet to a position to suit Ri is intended to provide.

  Next, the present invention provides a sheet processing method using the sheet processing apparatus. That is, the present invention is a sheet processing method including a processing step of processing a strip-shaped sheet disposed on an endless belt wound around a plurality of rolls, and the sheet processing method is performed on the sheet. The processing is at least one of sheet pressing, sheet sealing, and sheet cutting, and the plurality of rolls used in the processing step are driven by at least one driving roll and a plurality of driving rolls. A plurality of driven rolls, and at least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt, and the plurality of driven rolls At least one of the plurality of automatic rolls is a self-aligning roll whose peripheral surface swings in accordance with the tension in the width direction of the endless belt, and at least one of the plurality of driven rolls is a front roll. It is a tension roll that adjusts the tension of the endless belt, and the fixed roll is arranged at a position adjacent to the upstream side of the drive roll via the endless belt, and in the processing step, the endless belt The present invention provides a sheet processing method for processing the belt-like sheet in a state of being pressed on the peripheral surface of the drive roll.

  According to the present invention, meandering of a belt or a belt can be suppressed with a simple configuration. Moreover, the belt meandering can be suppressed, and the belt-like body conveyed by the belt can be processed stably.

FIG. 1 is a schematic perspective view showing a sheet conveying apparatus provided with a belt driving apparatus according to a first preferred embodiment of the present invention. FIG. 2 is a plan view of the conveying device shown in FIG. 1 viewed from the side. FIG. 3 is a plan view of a driving roll provided in the transport device shown in FIG. 1 as viewed from the side. FIG. 4 is a plan view of a fixed roll provided in the transport device shown in FIG. 1 as viewed from the side. FIG. 5 is a plan view of the self-aligning roll provided in the transport device shown in FIG. 1 as viewed from the side. 6 is a cross-sectional view taken along line VI-VI shown in FIG. FIG. 7 is a schematic plan view showing a sheet conveying apparatus according to a second preferred embodiment of the present invention. FIG. 8 is a schematic perspective view showing a sheet processing apparatus according to a preferred third embodiment of the present invention. FIG. 9 is a schematic plan view showing a sheet conveying apparatus according to another preferred embodiment of the present invention (corresponding to FIG. 2).

Hereinafter, a belt driving device and a sheet conveying device including the belt driving device according to the present invention will be described based on a preferred first embodiment with reference to FIGS.
As shown in FIG. 1, the sheet conveying apparatus 1A of the first embodiment (hereinafter also simply referred to as “conveying apparatus 1A”) includes a plurality of rolls 2, 2, 2,. And an endless belt 3 wound around the rolls 2, 2, 2..., A belt driving device 100 that rotates the plurality of rolls 2 to circulate the endless belt 3, and is arranged on the endless belt 3. 2 is a sheet conveying apparatus that conveys the belt-shaped sheet 4 formed.

  As shown in FIGS. 1 to 2, the plurality of rolls 2 include at least one drive roll 21 to be driven and a plurality of driven rolls 22 that are driven by the drive roll 21. In the following description, the axial direction of the drive roll 21 is described as the X direction. In the transport device 1 </ b> A, the axial direction of each driven roll 22 matches the axial direction (X direction) of the drive roll 21. In addition, the conveyance direction of the belt-like sheet 4 will be described as the Y direction.

  As shown in FIGS. 1 to 3, the drive roll 21 has a cylindrical drive roll main body 211 that is rotationally driven in the direction of arrow R. The drive roll main body 211 has a disk-shaped fixing plate 212 at the proximal end in the axial direction (X direction), and a central shaft 213 at the center of the fixing plate 212. The central shaft portion 213 of the drive roll body 211 is held by a support (not shown) so that the drive roll body 211 is rotationally driven in the direction of arrow R by receiving power from a motor such as a motor. It has become. The drive roll body 211 is formed such that the length in the axial direction (X direction) is longer than the width of the belt-like sheet 4 and the endless belt 3 on which the sheet 4 is arranged. The drive roll main body 211 is provided with flanges 214 and 214 that extend from the peripheral surface of the drive roll main body 211 and prevent the endless belt 3 from falling off at both ends in the axial direction (X direction). It has been. The drive roll main body 211, the fixed plate 212, the central shaft part 213, and the flange 214 are made of a metal rigid body and are integrally formed.

  One of the plurality of driven rolls 22 is a fixed roll 23 whose peripheral surface does not swing according to the tension in the width direction of the endless belt 3, and one of the plurality of driven rolls 22 is endless. A self-aligning roll 24 whose peripheral surface swings according to the tension in the width direction of the belt 3, and one of the plurality of driven rolls 22 is a tension roll 25 that adjusts the tension of the endless belt 3. . Hereinafter, the fixed roll 23, the automatic alignment roll 24, and the tension roll 25 will be described in detail.

  The fixed roll 23 is a driven roll 22, and as shown in FIGS. 1 to 2 and 4, a cylindrical fixed roll main body portion 231 that rotates in the direction of the arrow, and a columnar shape inside the fixed roll main body portion 231. And a shaft (not shown). The shaft (not shown) of the fixed roll 23 is held at its base end by a support (not shown). The shaft (not shown) supports the fixed roll main body 231 via a rolling bearing (not shown). The fixed roll main body 231 is formed such that its axial length is longer than the width of the belt-like sheet 4 and the endless belt 3 on which the sheet 4 is arranged. The fixed roll main body 231 has disk-shaped fixed plates 232 and 232 at both ends in the axial direction. Each disk-shaped fixing plate 232 is fitted to the circular inner peripheral wall of the fixed roll body 231 at the axial end of the fixed roll body 231.

  As shown in FIGS. 1 and 4, the fixed roll main body portion 231 is provided with flanges 234 and 234 that protrude from the peripheral surface of the fixed roll main body portion 231 at both axial ends thereof. Each flange 234 is screwed with a screw 235 to the axial end of the fixed roll body 231. By providing flanges 234 over the entire circumference at both ends in the axial direction of the fixed roll body 231, the endless belt 3 can be prevented from falling off. In the conveying apparatus 1A, the axial direction of the fixed roll 23 and the axial direction (X direction) of the drive roll main body 211 are the same direction. That is, the shaft (not shown) of the fixed roll body 231 and the central shaft part 213 of the drive roll body 211 extend in parallel. The fixed roll body 231, the fixed plate 232, the shaft (not shown), and the flange 234 are formed from a metal rigid body.

  The automatic centering roll 24 is a driven roll 22, and as shown in FIGS. 1 to 2 and FIGS. 5 to 6, a cylindrical automatic centering roll body 241 that rotates in the direction of the arrow, and an automatic centering roll A cylindrical shaft 243 is provided inside the main body 241. The shaft 243 of the self-aligning roll 24 has a base end side end held by a support (not shown). The shaft 243 supports the self-aligning roll main body 241 via the self-aligning roller bearing 5 in the conveying device 1A. The self-aligning roll main body 241 has an axial length longer than the width of the belt-like sheet 4 and the endless belt 3 on which the sheet 4 is arranged.

  As shown in FIGS. 1 and 6, the self-aligning roll main body portion 241 is provided with flanges 244 and 244 that protrude from the peripheral surface of the self-aligning roll main body portion 241 at both axial ends thereof. ing. Each flange 244 is screwed to the end of the self-aligning roll main body 241 in the axial direction with a screw 245. By providing flanges 244 over the entire circumference at both ends in the axial direction of the self-aligning roll body 241, the endless belt 3 can be prevented from falling off. In 1 A of conveying apparatuses, the axial direction of the self-aligning roll main-body part 241 and the axial direction (X direction) of the drive roll main-body part 211 are the same directions. That is, the shaft 243 of the self-aligning roll main body 241 and the central shaft portion 213 of the drive roll main body 211 extend in parallel. The self-aligning roll main body 241, the shaft 243, the flange 244, and the self-aligning roller bearing 5 are formed from a metal rigid body.

  As shown in FIG. 6, the self-aligning roller bearing 5 constituting the self-aligning roll 24 includes an inner ring portion 51 that is fixed to the shaft 243 using the friction fastener 7. On the outer peripheral surface of the inner ring portion 51, a group of concave portions 53 in which concave portions 53 that hold cylindrical rollers 52 that are long in the axial direction of the shaft 243 are intermittently arranged in the circumferential direction is formed in the axial direction (X direction). Two rows are formed. Accordingly, a group of rollers 52 in which the rollers 52 housed and held in the respective recesses 53 are arranged at a constant interval in the circumferential direction is formed in two rows in the axial direction (X direction). In the conveying device 1A, when the self-aligning roller bearing 5 is viewed in the axial direction (X direction), between the rollers 52, 52 adjacent to each other in the circumferential direction constituting the group of the rollers 52 in one row, the other roller One roller 52 constituting the group of rollers 52 in a row is arranged. Each roller 52 is accommodated in a recess 53 of the inner ring portion 51 and is held in the recess 53 by a holder 54.

As shown in FIGS. 1 and 6, the automatic alignment roll 24 is supported by the shaft 243 through the automatic alignment roller bearing 5 described above, so that the automatic alignment roll main body 241 is supported by the width of the endless belt 3. The peripheral surface of the self-aligning roll main body 241 is a swinging roll that is inclined with respect to the axis of the shaft 243 according to the direction tension.
By providing the automatic alignment roll 24 with such a configuration, for example, when the endless belt 3 meanders to the right in the width direction by changing the tension in the width direction of the endless belt 3 in FIG. 241 is inclined in the same direction (clockwise) as meandering of the endless belt 3 around the pivot axis. Accordingly, in the endless belt 3, the tension on the left side in the width direction becomes larger than the tension on the right side in the width direction. For this reason, the counterclockwise turning force is applied to the self-aligning roll main body 241 around the swing axis. Thus, the endless belt 3 is given a force to return to the center in the width direction, the endless belt 3 is centered, and the meandering can be suppressed.

  The tension roll 25 is a driven roll 22, and as shown in FIGS. 1 and 2, a cylindrical self-aligning roll main body portion 251 that rotates in the direction of the arrow, and a cylindrical shape inside the automatic alignment roll main body portion 251. Shaft 253. The shaft 253 of the tension roll 25 is held at its base end by a support (not shown) via an air cylinder, hydraulic cylinder, or jack bolt, and the tension roll 25 is supported by a support (not shown). It is possible to move in the vertical direction or in the front-rear direction. The shaft 253 supports the automatic alignment roll main body 251 via the automatic alignment roller bearing 5 in the same manner as the automatic alignment roll 24 in the conveying apparatus 1A. The self-aligning roll main body 251 is formed such that its axial length is longer than the width of the belt-like sheet 4 and the endless belt 3 on which the sheet 4 is arranged.

  As shown in FIGS. 1 and 2, the self-aligning roll main body portion 251 is provided with flanges 254 and 254 protruding from the peripheral surface of the automatic alignment roll main body portion 251 at both axial end portions thereof. ing. Each flange 254 is screwed to the axial end of the self-aligning roll main body 251 with a screw 255. By providing flanges 254 over the entire circumference at both axial ends of the self-aligning roll main body 251, the endless belt 3 can be prevented from falling off. In 1 A of conveying apparatuses, the axial direction of the self-aligning roll main-body part 251 and the axial direction (X direction) of the drive roll main-body part 211 are the same directions. That is, the shaft 253 of the self-aligning roll main body portion 251 and the central shaft portion 213 of the drive roll main body portion 211 extend in parallel. The self-aligning roll main body 251, the shaft 253, the flange 254, and the self-aligning roller bearing 5 are formed from a metal rigid body.

  The tension roll 25 is a roll that also serves as an automatic alignment roll in the transport apparatus 1A. That is, the tension roll 25 is movable in the up-down direction or the front-rear direction with respect to a support (not shown), so that the tension of the endless belt 3 or the belt-like sheet 4 can be adjusted. As shown in FIGS. 1 and 2, the tension roll 25 has the self-aligning roll main body 251 supported on the shaft 253 via the self-aligning roller bearing 5 described above. The peripheral surface of the self-aligning roll main body 251 is a swinging roll that changes with respect to the axis of the shaft 253 according to the direction tension.

Next, a description will be given of a feature of the conveyance device 1A including the belt driving device 100 of the first embodiment. Patent Document 1 discloses a belt-type transmission device in which an automatic alignment pulley is arranged. However, depending on the arrangement relationship between a driving roll and a driven roll driven by the driving roll, the belt meandering can be effectively performed. The inventors of the present application have found that there is an arrangement relationship that cannot be suppressed.
That is, in order to effectively suppress the meandering of the belt, the positional relationship between the driving roll and the driven roll is important. In the belt driving apparatus of the present invention and the sheet conveying apparatus equipped with the belt driving apparatus, the fixed roll 23 However, it is characterized in that it is arranged at a position adjacent to the upstream side of the drive roll 21 via the endless belt 3. Specifically, in the belt driving device 100 and the conveying device 1A including the belt driving device 100, as shown in FIGS. 1 and 2, the driven roll 22 includes a fixed roll 23, an automatic alignment roll 24, and a tension. The roll 25 has three rolls, and a fixed roll 23, an automatic alignment roll 24, and a tension roll 25 are arranged inside the endless belt 3. In the conveying device 1 </ b> A including the belt driving device 100, one driving roll 21 is disposed outside the endless belt 3. More specifically, in the transport apparatus 1A including the belt driving device 100, the fixed roll 23 is disposed on the upstream side in the transport direction (Y direction), and the automatic alignment roll 24 is disposed on the downstream side in the transport direction (Y direction). It is arranged. The drive roll 21 is disposed between the fixed roll 23 and the automatic alignment roll 24. Further, the tension roll 25 is disposed above the drive roll 21. The endless belt 3 is wound around the fixed roll 23, the automatic alignment roll 24 and the tension roll 25 with the fixed roll 23, the automatic alignment roll 24 and the tension roll 25 inside. The tension of the endless belt 3 can be adjusted by moving the tension roll 25 in the vertical direction. It is desirable to adjust the tension of the wound endless belt 3 to a range of 0.25 N / mm or more and 22.5 N / mm or less by moving the tension roll 25 in this way.

  As shown in FIGS. 1 and 2, the drive roll 21 is disposed outside the endless belt 3. Therefore, in the conveying apparatus 1 </ b> A provided with the belt driving device 100, the fixed roll 23 is disposed at a position adjacent to the upstream side of the driving roll 21 via the endless belt 3. The automatic alignment roll 24 is disposed at a position adjacent to the downstream side of the drive roll 21 via the endless belt 3. That is, the fixed roll 23 is arranged at the most adjacent position on the upstream side of the drive roll 21 via the endless belt 3. The self-aligning roll 24 is disposed at the most adjacent position on the downstream side of the drive roll 21 via the endless belt 3.

  Further, as shown in FIG. 1, the belt-like sheet 4 is conveyed while being pressed onto the peripheral surface of the drive roll 21 by the endless belt 3. Specifically, by driving the drive roll 21 in the arrow R direction, the endless belt 3 wound around the drive roll 21 rotates in the arrow direction, and the driven roll 22 (fixed roll) around which the endless belt 3 is wound. 23, an automatic alignment roll 24 and a tension roll 25) are rotated. The belt-like sheet 4 disposed on the endless belt 3 is pressed onto the peripheral surface of the drive roll main body 211 of the drive roll 21 by the endless belt 3, and the drive roll 21 is rotationally driven in the direction of arrow R. Thus, the belt-like sheet 4 in a pressurized state is conveyed in the Y direction.

The range of the winding angle (contact angle) of the endless belt 3 wound around the drive roll 21 is 360 ° when the endless belt 3 contacts the entire circumference of the cylindrical drive roll main body 211 in the circumferential direction. In this case, it is preferably 90 ° or more and 180 ° or less, and more preferably 100 ° or more and 150 ° or less.
Further, the winding angle (contact angle) of the endless belt 3 wound around the automatic alignment roll 24 is such that the endless belt 3 extends over the entire circumference in the circumferential direction of the cylindrical automatic alignment roll main body 241. When the contact is 360 °, it is preferably 45 ° or more and 270 ° or less, and more preferably 105 ° or more and 210 ° or less.

  As the endless belt 3, a metal or resin belt having heat resistance capable of withstanding heat generated during processing can be used. The width of the endless belt 3 is preferably about 50 mm or more and 500 mm or less.

  Examples of the belt-like sheet 4 include a single sheet such as paper, nonwoven fabric, or resin film, or a laminated sheet thereof. Specifically, as a laminated sheet, a laminated sheet of two or more layers of nonwoven fabric, a laminated sheet of a resin film and a nonwoven fabric, a sheet loaded with contents (confectionery, wet tissue, etc.) in a cylindrical bag, Examples include a diaper continuum (for example, one shown in FIG. 3 of Japanese Patent Laid-Open No. 2008-137271) formed of a continuous body of outer packaging material folded in two together with an absorbent main body including an absorbent body. Examples of the material of the sheet 4 include polyolefin resins typified by polyethylene and polypropylene.

A first embodiment of a sheet conveying method for conveying a belt-like sheet 4 using the above-described conveying apparatus 1A will be described with reference to FIG.
The sheet conveying method according to the first embodiment includes a conveying step for conveying a belt-like sheet 4 arranged on an endless belt 3 wound around a plurality of rolls 2, 2, 2,. . In the transport process, the above-described transport device 1A is used. Specifically, first, the endless belt 3 wound around the drive roll 21 is moved in the direction of the arrow by driving the drive roll 21 arranged outside the endless belt 3 in the direction of the arrow R. At that time, the driven roll 22 (fixed roll 23, automatic centering roll 24, and tension roll 25) arranged and wound inside the endless belt 3 is rotated, and the endless belt 3 is continuously rotated in the arrow direction.

  Next, the belt-like sheet 4 is applied between a peripheral surface of the drive roll main body 211 of the drive roll 21 driven in the direction of arrow R and the endless belt 3 in a state where a predetermined tension is applied by a guide roll (not shown). Introduce. Then, the belt-like sheet 4 disposed on the endless belt 3 is pressed onto the peripheral surface of the drive roll main body 211 of the drive roll 21 by the endless belt 3, and the drive roll 21 is rotationally driven in the arrow R direction. The belt-like sheet 4 in a pressurized state is conveyed in the Y direction.

  Subsequently, the belt-shaped sheet 4 in a pressurized state is separated from the peripheral surface of the drive roll main body 211 of the drive roll 21 by the downstream automatic alignment roll 24, and the automatic alignment roll main body 241 of the automatic alignment roll 24 is removed. Is transported in the direction of the arrow to convey the belt-like sheet 4 arranged on the endless belt 3. Thereafter, the belt-like sheet 4 is separated from the endless belt 3 and conveyed in the Y direction by a nip roll (not shown) on the downstream side.

  Here, in the belt driving device 100 and the conveyance device 1A including the belt driving device 100, a plurality of rolls 2 around which the endless belt 3 is wound are driven by the driving roll 21 and the driving roll 21, as shown in FIG. The plurality of driven rolls 22 are fixed rolls 23 whose peripheral surfaces do not swing according to the widthwise tension of the endless belt 3 and the widthwise tension of the endless belt 3. The automatic centering roll 24 whose peripheral surface swings and the tension roll 25 for adjusting the tension of the endless belt 3 are provided. The fixed roll 23 is arranged at a position adjacent to the upstream side of the drive roll 21 via the endless belt 3. Therefore, meandering of the endless belt 3 can be suppressed, and the belt-like sheet 4 disposed on the endless belt 3 can be stably conveyed. Here, in 1 A of conveying apparatuses, the axial direction of the fixed roll 23 and the axial direction (X direction) of the drive roll main-body part 211 are the same directions. Therefore, the conveyance direction (Y direction) of the endless belt 3 coincides with the rotation direction (Y direction) of the fixed roll 23 and the drive roll 21, and the conveyance direction of the endless belt 3 can be stabilized.

  Further, in the belt driving device 100 and the conveying device 1A including the belt driving device 100, as shown in FIG. 1, the driven roll 22 (fixed roll 23, automatic centering roll 24, and tension roll 25) inside the endless belt 3 is provided. ) And a drive roll 21 is disposed outside the endless belt 3. The belt-like sheet 4 is conveyed while being pressed onto the peripheral surface of the drive roll 21 by the endless belt 3. Therefore, the belt-like sheet 4 disposed on the endless belt 3 can be conveyed more stably.

  In the belt driving device 100 and the transport device 1A including the belt driving device 100, as shown in FIG. 1, the automatic alignment roll 24 is adjacent to the downstream side of the driving roll 21 via the endless belt 3. Arranged in position. Therefore, even if the tension in the width direction of the endless belt 3 changes, the peripheral surface of the downstream automatic alignment roll 24 swings according to the tension in the width direction of the endless belt 3, and the meandering of the endless belt 3 Can be stabilized. Therefore, the meandering of the endless belt 3 can be further suppressed, and the belt-like sheet 4 disposed on the endless belt 3 can be conveyed more stably.

  In addition, in the belt driving device 100 and the conveyance device 1A including the belt driving device 100, a tension roll 25 is disposed on the downstream side of the automatic alignment roll 24 via the endless belt 3 as shown in FIG. The tension roll 25 is a roll that also serves as an automatic alignment roll. For this reason, even if the tension in the width direction of the endless belt 3 changes, the peripheral surfaces of the downstream self-aligning roll 24 and the tension roll 25 swing according to the tension in the width direction of the endless belt 3 and endlessly. The meandering of the belt 3 can be further stabilized. Therefore, the meandering of the endless belt 3 can be further suppressed, and the belt-like sheet 4 disposed on the endless belt 3 can be conveyed more stably.

  According to the sheet conveying method of the first embodiment including the conveying step of conveying the belt-like sheet 4 using the conveying device 1A as described above, the belt-like sheet 4 is stably and continuously conveyed. Can do.

Next, the sheet conveying apparatus of the present invention will be described based on the preferred second embodiment with reference to FIG.
Regarding the sheet conveying apparatus 1B (hereinafter, also referred to as “conveying apparatus 1B”) of the second embodiment, differences from the conveying apparatus 1A of the first embodiment will be described. The points that are not particularly described are the same as those of the transfer apparatus 1A of the first embodiment, and the description of the transfer apparatus 1A of the first embodiment is appropriately applied.

  As shown in FIG. 7, the conveying device 1 </ b> B is a sheet conveying device that conveys a belt-like sheet 4 wound around a plurality of rolls 2, 2, 2,. In other words, the conveying device 1B has a configuration in which the endless belt 3 that conveys the belt-like sheet 4 is not provided as compared with the conveying device 1A.

  The drive roll 21 is formed such that the length of the drive roll main body 211 in the axial direction (X direction) is longer than the width of the belt-like sheet 4 in the transport device 1B. The drive roll main body 211 has flanges 214 and 214 extending from the peripheral surface of the drive roll main body 211 at both ends in the axial direction (X direction) to prevent the strip-shaped sheet 4 from falling off. Is provided.

  The fixed roll 23 that is the driven roll 22 is formed such that the length of the fixed roll main body 231 in the axial direction is longer than the width of the belt-like sheet 4 in the transport device 1B. The fixed roll main body portion 231 is provided with flanges 234 and 234 raised from the peripheral surface of the fixed roll main body portion 231 at both axial end portions thereof, so that the strip-shaped sheet 4 can be prevented from falling off. Yes.

  The automatic alignment roll 24 that is the driven roll 22 is formed such that the axial length of the automatic alignment roll main body 241 is longer than the width of the belt-like sheet 4 in the transport device 1B. The self-aligning roll main body 241 is provided with flanges 244 and 244 protruding from the peripheral surface of the automatic aligning roll main body 241 at both axial end portions thereof, so that the strip-shaped sheet 4 can be prevented from falling off. It is like that.

  The tension roll 25 that is the driven roll 22 is formed such that the axial length of the self-aligning roll main body 251 is longer than the width of the belt-like sheet 4 in the transport device 1B. The self-aligning roll main body 251 is provided with flanges 254 and 254 raised from the peripheral surface of the automatic aligning roll main body 251 at both ends in the axial direction, so that the strip-shaped sheet 4 can be prevented from falling off. It is like that. The tension roll 25 is a roll that also plays a role of an automatic alignment roll, like the transport device 1A.

  The present inventors have found that the positional relationship between the driving roll and the driven roll is important in order to effectively suppress the meandering of the belt, and in the sheet conveying apparatus of the present invention, the fixed roll 23 has a belt-like shape. It is characterized by being arranged at a position adjacent to the upstream side of the drive roll 21 via the sheet 4. Specifically, in the transport device 1B, as shown in FIG. 7, the driven roll 22 has three rolls of a fixed roll 23, an automatic alignment roll 24, and a tension roll 25. From the upstream side to the downstream side in the transport direction (Y direction), an automatic alignment roll 24, a fixed roll 23, and a tension roll 25 that also serves as an automatic alignment roll are arranged in this order, and the drive roll 21 is fixed. It is arranged between the roll 23 and the tension roll 25. Here, the positions of the fixed roll 23 and the drive roll 2 are arranged above the positions of the automatic alignment roll 24 and the tension roll 25.

  As shown in FIG. 7, the belt-like sheet 4 is wound around an automatic alignment roll 24, a fixed roll 23, a drive roll 21, and a tension roll 25 that also serves as an automatic alignment roll. The tension of the belt-like sheet 4 can be adjusted by moving the tension roll 25 in the front-rear direction. In the transport device 1 </ b> B, the fixed roll 23 is disposed at a position adjacent to the upstream side of the drive roll 21 via the belt-like sheet 4. In addition, the tension roll 25 that also serves as an automatic alignment roll is disposed at a position adjacent to the downstream side of the drive roll 21 via the belt-like sheet 4. That is, the fixed roll 23 is disposed at the most adjacent position on the upstream side of the drive roll 21 via the belt-like sheet 4. In addition, the tension roll 25 that also serves as an automatic alignment roll is disposed at the most adjacent position on the downstream side of the drive roll 21 via the belt-like sheet 4.

  In the transport device 1B, as shown in FIG. 7, by driving the drive roll 21 in the direction of arrow R, the belt-like sheet 4 wound around the drive roll 21 rotates in the arrow direction, and the belt-like sheet 4 The driven roll 22 (fixed roll 23, self-aligning roll 24, and tension roll 25) wound around is rotated. In this way, the belt-like sheet 4 wound around the plurality of rolls 21, 23, 24, 25 is conveyed in the Y direction.

A second embodiment of the sheet conveying method for conveying the belt-like sheet 4 using the conveying apparatus 1B described above will be described with reference to FIG.
The sheet conveying method of the second embodiment includes a conveying step for conveying the belt-like sheet 4 wound around a plurality of rolls 2, 2, 2,. In the transfer process, the transfer device 1B described above is used. Specifically, first, from the upstream side toward the downstream side, each roll arranged in the order of the automatic alignment roll 24, the fixed roll 23, the drive roll 21, and the tension roll 25 also serving as the automatic alignment roll. The belt-shaped sheet 4 is wound around. The front end of the wound belt-like sheet 4 is sandwiched between nip rolls (not shown) on the downstream side.

  Next, the drive roll 21 is driven in the direction of arrow R, and a nip roll (not shown) on the downstream side is driven to move the belt-like sheet 4 wound around the drive roll 21 in the direction of arrow. At that time, a follower roll 22 (fixed roll 23, automatic alignment roll 24 and tension roll 25) around which the belt-like sheet 4 is wound is rotated to continuously convey the belt-like sheet 4 in the arrow direction (Y direction). To do.

  Here, in the conveying apparatus 1B, as shown in FIG. 7, the plurality of rolls 2 around which the belt-like sheet 4 is wound are composed of a driving roll 21 and a plurality of driven rolls 22 driven by the driving roll 21, A plurality of driven rolls 22 include a fixed roll 23 whose peripheral surface does not swing according to the widthwise tension of the belt-like sheet 4, and an automatic adjustment whose peripheral surface swings according to the widthwise tension of the belt-like sheet 4. A core roll 24 and a tension roll 25 for adjusting the tension of the belt-like sheet 4 are provided. And the fixed roll 23 is distribute | arranged to the position adjacent to the upstream of the drive roll 21 through the strip | belt-shaped sheet | seat 4. As shown in FIG. Therefore, meandering of the belt-like sheet 4 can be suppressed, and the belt-like sheet 4 can be stably conveyed.

  Further, in the transport device 1B, as shown in FIG. 7, a tension roll 25 that also serves as an automatic centering roll is disposed at a position adjacent to the downstream side of the drive roll 21 via the belt-like sheet 4. Yes. Therefore, even if the tension in the width direction of the belt-like sheet 4 changes, the peripheral surface of the self-aligning roll main body 251 of the downstream tension roll 25 swings according to the tension in the width direction of the belt-like sheet 4. Thus, the meandering of the belt-like sheet 4 can be stabilized. Therefore, meandering of the belt-like sheet 4 can be further suppressed, and the belt-like sheet 4 can be conveyed more stably.

  Moreover, in the conveying apparatus 1B, as shown in FIG. 7, the automatic alignment roll 24 is distribute | arranged to the upstream of the fixed roll 23 via the strip | belt-shaped sheet | seat 4. As shown in FIG. Therefore, even if the tension in the width direction of the belt-like sheet 4 changes, the peripheral surfaces of the upstream self-aligning roll 24 and the downstream tension roll 25 swing according to the tension in the width direction of the belt-like sheet 4. By moving, the meandering of the belt-like sheet 4 can be further stabilized. Therefore, the meandering of the belt-like sheet 4 can be further suppressed, and the belt-like sheet 4 can be conveyed more stably.

  According to the sheet conveying method of the second embodiment including the conveying step of conveying the belt-like sheet 4 using the conveying device 1B as described above, the belt-like sheet 4 is stably and continuously conveyed. Can do.

Next, the sheet processing apparatus of the present invention will be described based on a preferred third embodiment with reference to FIG.
Regarding a sheet processing apparatus 1C (hereinafter, also referred to as “processing apparatus 1C”) including the belt driving apparatus 100 of the third embodiment, differences from the conveying apparatus 1A of the first embodiment will be described. The points that are not particularly described are the same as those of the transfer apparatus 1A of the first embodiment, and the description of the transfer apparatus 1A of the first embodiment is appropriately applied.

  As shown in FIG. 8, the processing apparatus 1 </ b> C is a sheet for processing a belt-like sheet 4 disposed on an endless belt 3 wound around a plurality of rolls 2, 2, 2,. It is a processing device. The processing performed on the sheet 4 is at least one of sheet pressing, sheet sealing, and sheet cutting. In the processing apparatus 1C, all of sheet pressing, sheet sealing, and sheet cutting are applicable. To do.

  In the processing apparatus 1 </ b> C, as shown in FIG. 8, the drive roll main body 211 of the drive roll 21 has slit-shaped openings 215 that are long in the axial direction (X direction) at regular intervals in the circumferential direction. It is arranged intermittently. The slit-shaped opening 215 is formed longer than the width of the belt-shaped sheet 4. The drive roll main body 211 allows the laser light to pass through the slit-shaped opening 215, and does not allow the laser light to pass through or pass through the portion other than the slit-shaped opening 215. The slit-shaped opening 215 can be formed by drilling or the like in the drive roll main body 211 by etching, punching, laser processing, or the like. In addition, when the strip | belt-shaped sheet | seat 4 is the strip | belt-shaped diaper continuous body mentioned later, the space | interval of the circumferential direction of the slit-shaped opening part 215 is absorption adjacent to the conveyance direction (Y direction) in a strip | belt-shaped diaper continuous body. This corresponds to the interval in the conveyance direction (Y direction) at the intermediate position between the sex main bodies 40 and 40.

  As illustrated in FIG. 8, the processing apparatus 1 </ b> C includes an irradiation head 61 that irradiates laser light 6 toward the peripheral surface of the drive roll body 211 inside the hollow drive roll body 211. The irradiation head 61 is a galvano scanner that freely scans the laser beam 6. More specifically, the irradiation head 61 includes a mirror 62 that reflects the irradiated laser beam 6 and scans the laser beam 6 freely. The mirror 62 is attached to the motor shaft. The mirror 62 of the irradiation head 61 has a mechanism for moving the laser beam 6 in a direction parallel to the axial direction (X direction) of the drive roll body 211 and a mechanism for moving the laser beam 6 in the circumferential direction of the drive roll body 211. It is possible to scan the laser beam 6 freely. The lens 63 of the irradiation head 61 includes a mechanism for condensing the laser light 6 and making the spot (irradiation point, focal point f) diameter of the laser light 6 constant on the peripheral surface of the drive roll main body 211. . The irradiation head 61 includes the mirror 62 and the lens 63, thereby arbitrarily moving the irradiation point (focal point f) of the laser light 6 in both the circumferential direction and the axial direction (X direction) of the drive roll main body 211. Can do. Accordingly, the laser beam 6 is irradiated from the irradiation head 61 toward the long slit-shaped opening 215 of the rotating drive roll main body 211, and the reciprocation (one pass) is performed along the slit-shaped opening 215. It is possible to continue to irradiate the laser beam 6 over a period of time.

  The driven roll 22 (fixed roll 23, automatic alignment roll 24, and tension roll 25) of the processing apparatus 1C has the same configuration as that of the conveying apparatus 1A. Further, the arrangement relationship of the fixed roll 23, the automatic alignment roll 24, and the tension roll 25 of the processing device 1C is the same as the arrangement relationship of the fixed roll 23, the automatic alignment roll 24, and the tension roll 25 of the conveyance device 1A.

  As the endless belt 3, a metal or resin belt having heat resistance capable of withstanding the heat generated during processing can be used. In particular, as the endless belt 3 in the processing apparatus 1 </ b> C, the belt-shaped sheet 4 is irradiated. It is preferable to use a laser beam that does not transmit laser light.

  Examples of the belt-like sheet 4 include a sheet of paper, a nonwoven fabric, a resin film, or the like, or a laminated sheet thereof. Particularly, as the laminated sheet in the processing apparatus 1C, the absorbent main body 40 including the absorbent body is used. Examples include a diaper continuous body (for example, one shown in FIG. 3 of Japanese Patent Application Laid-Open No. 2008-137271) formed of a continuous body of outer packaging material folded in half. Examples of the material of the sheet 4 include polyolefin resins typified by polyethylene and polypropylene. The so-called disposable diaper side seal portion S is formed by sealing and cutting the belt-like diaper continuous body that is the belt-like sheet 4 by the processing apparatus 1C.

A third embodiment of the sheet processing method for processing the belt-like sheet 4 using the above-described processing apparatus 1C will be described with reference to FIG.
The sheet processing method according to the third embodiment includes a processing step of processing the belt-like sheet 4 disposed on the endless belt 3 wound around the plurality of rolls 2, 2, 2,. I have. In the processing step, the above-described processing apparatus 1C is used. Specifically, first, the endless belt 3 wound around the drive roll 21 is moved in the direction of the arrow by driving the drive roll 21 arranged outside the endless belt 3 in the direction of the arrow R. At that time, the driven roll 22 (fixed roll 23, automatic centering roll 24, and tension roll 25) arranged and wound inside the endless belt 3 is rotated, and the endless belt 3 is continuously rotated in the arrow direction.

  Next, the belt-like diaper continuous body as the belt-like sheet 4 is applied with a predetermined tension by a guide roll (not shown), and the circumferential surface of the drive roll main body 211 of the drive roll 21 that is driven in the direction of arrow R. It introduces between the endless belt 3. Then, the belt-like diaper continuous body, which is the belt-like sheet 4 disposed on the endless belt 3, is pressed onto the peripheral surface of the drive roll main body 211 of the drive roll 21 by the endless belt 3, and the drive roll 21 is moved to the arrow R. The belt-like diaper continuous body which is the belt-like sheet 4 is conveyed in a pressurized state by being rotationally driven in the direction.

  And while conveying the continuous diaper continuous body which is the belt-shaped sheet 4 in a pressurized state, the laser light travels along the slit-shaped opening 215 from the inside of the drive roll main body 211 to the continuous diaper continuous body. By irradiating 6 from the irradiation head 61, the diaper continuums are individually divided, and at the same time, the cutting edges of the plurality of sheets constituting the diaper continuum in the pressurized state caused by the division are separated. The side seal portions S and S (seal edge portions) are formed by fusing. Thus, the underpants type disposable diaper 400 which comprises the outer packaging material 41 (sheet fusion body) which has a pair of side seal part S and S (seal edge part) is manufactured continuously.

  When the planned site of the side seal portion S in the plurality of sheets constituting the belt-like diaper continuous body is irradiated with the laser light 6, the forming material (fibers, etc.) of the plurality of sheets existing in the planned part is The formation material which is vaporized and disappeared by the heat generated by the direct irradiation of the laser beam 6 and is in the vicinity of the predetermined portion is indirectly heated by the laser beam 6 and melted. As a result, the predetermined portion is divided, and the single diaper 400 is cut from the strip-shaped diaper continuum so that the diaper continuum is cut at the same time as the diaper continuum is cut. The cut edges of the plurality of sheets in the leaf diaper 400 are fused and sealed.

  Next, the pressed diaper 400 is separated from the peripheral surface of the drive roll main body 211 of the drive roll 21 by the downstream automatic alignment roll 24, and the automatic alignment roll main body of the automatic alignment roll 24 is removed. The sheet diaper 400 arranged on the endless belt 3 is conveyed by the rotation of 241 in the direction of the arrow. Thereafter, the sheet diaper 400 is transported away from the endless belt 3 by a nip roll (not shown) on the downstream side.

  Here, in the processing apparatus 1 </ b> C provided with the belt driving device 100, as shown in FIG. 8, the plurality of rolls 2 around which the endless belt 3 is wound are driven by the driving roll 21 and the driving roll 21. And a plurality of driven rolls 22 are fixed rolls 23 whose circumferential surfaces do not swing according to the widthwise tension of the endless belt 3, and whose circumferential surfaces are rocked according to the widthwise tension of the endless belt 3. A self-aligning roll 24 that moves and a tension roll 25 that adjusts the tension of the endless belt 3 are provided. The fixed roll 23 is arranged at a position adjacent to the upstream side of the drive roll 21 via the endless belt 3. Therefore, meandering of the endless belt 3 can be suppressed, and the continuous diaper continuous body, which is the belt-like sheet 4 disposed on the endless belt 3, can be stably conveyed in a pressurized state. Therefore, the side seal portions S and S (seal edge portions) can be easily formed with high accuracy by irradiation with the laser beam 6, and the pants-type disposable diaper 400 can be stably manufactured.

  Moreover, in the processing apparatus 1C provided with the belt driving device 100, as shown in FIG. 8, a driven roll 22 (a fixed roll 23, an automatic alignment roll 24, and a tension roll 25) is arranged inside the endless belt 3. A drive roll 21 is disposed outside the endless belt 3. A belt-like diaper continuous body, which is a belt-like sheet 4, is conveyed while being pressed onto the peripheral surface of the drive roll 21 by the endless belt 3. Therefore, it is possible to further stably convey the belt-like diaper continuous body, which is the belt-like sheet 4 disposed on the endless belt 3, in the pressurized state, and further to the side seal portions S and S (seal edge portions). The pants-type disposable diaper 400 can be more stably manufactured with ease and accuracy.

  Further, in the processing apparatus 1 </ b> C provided with the belt driving device 100, as shown in FIG. 8, the automatic alignment roll 24 is arranged at a position adjacent to the downstream side of the driving roll 21 via the endless belt 3. Yes. Therefore, even if the tension in the width direction of the endless belt 3 changes, the peripheral surface of the downstream automatic alignment roll 24 swings according to the tension in the width direction of the endless belt 3, and the meandering of the endless belt 3 Can be stabilized, and the meandering of the endless belt 3 can be further suppressed. Accordingly, the belt-like diaper continuous body, which is the belt-like sheet 4 disposed on the endless belt 3, can be conveyed in a more stable and pressurized state, and the side seal portions S, S (sealing edge portions) can be further accurately provided. It is easy to form well and the pants-type disposable diaper 400 can be manufactured more stably.

  Further, in the processing apparatus 1C including the belt driving device 100, as shown in FIG. 8, a tension roll 25 is disposed on the downstream side of the automatic alignment roll 24 via the endless belt 3, and the tension roll Reference numeral 25 denotes a roll that also serves as an automatic alignment roll. For this reason, even if the tension in the width direction of the endless belt 3 changes, the peripheral surfaces of the downstream self-aligning roll 24 and the tension roll 25 swing according to the tension in the width direction of the endless belt 3 and endlessly. The meandering of the belt 3 can be further stabilized, and the meandering of the endless belt 3 can be further suppressed. Therefore, the belt-like diaper continuous body which is the belt-like sheet 4 disposed on the endless belt 3 can be conveyed in a more stable and pressurized state, and the side seal portions S and S (seal edge portions) can be further provided. The pants-type disposable diaper 400 can be formed with higher accuracy and more stably.

  According to the sheet processing method of the third embodiment, which includes the processing step of processing the strip-shaped sheet 4 using the processing apparatus 1C as described above, the strip-shaped diaper continuous body that is the strip-shaped sheet 4 is pressed. In this state, it can be conveyed stably and continuously. Therefore, the side seal portions S, S (seal edge portions) can be easily formed with high accuracy by the irradiation of the laser beam 6, and the pants-type disposable diaper 400 can be manufactured stably and continuously.

As mentioned above, although this invention was demonstrated based on the preferable 1st-3rd embodiment, this invention is not restrict | limited to the said 1st-3rd embodiment.
For example, in the conveying apparatus 1A including the belt driving apparatus 100 of the first embodiment described above, the conveying apparatus 1B of the second embodiment, and the processing apparatus 1C including the belt driving apparatus 100 of the third embodiment, FIG. As shown in FIGS. 7 and 8, the tension roll 25 is a roll that can adjust the tension of the endless belt 3 or the belt-like sheet 4 and also serves as an automatic centering roll. It may be a roll that can adjust only the tension of the belt 3 or the belt-like sheet 4. That is, as shown in FIG. 9, the tension roll 25 is a fixed roll, and the proximal end of the shaft 253 is held on a support (not shown) via an air cylinder, a hydraulic cylinder, or a jack bolt. The tension roll 25, which is a fixed roll, may be a roll that is movable in the vertical direction or the front-rear direction with respect to a support (not shown).

  In the conveying apparatus 1A including the belt driving apparatus 100 of the first embodiment and the processing apparatus 1C including the belt driving apparatus 100 of the third embodiment, as shown in FIGS. The alignment roll 24 is arranged at a position adjacent to the downstream side of the drive roll 21 via the endless belt 3, but a fixed roll may be arranged instead of the automatic alignment roll 24.

  Moreover, in the conveyance apparatus 1B of 2nd Embodiment mentioned above, as shown in FIG. 7, the automatic centering roll 24 is distribute | arranged to the position adjacent to the upstream of the fixed roll 23 through the strip | belt-shaped sheet | seat 4. As shown in FIG. However, instead of the automatic alignment roll 24, a fixed roll may be arranged.

  Further, as shown in FIG. 6, the self-aligning roll 24 has a self-aligning roller bearing 5 as a constituent member, but has a self-aligning ball bearing instead of the self-aligning roller bearing 5. It may be. The same applies to the tension roll 25 that also serves as an automatic alignment roll.

Further, in the conveying apparatus 1A including the belt driving apparatus 100 of the first embodiment, the conveying apparatus 1B of the second embodiment, and the processing apparatus 1C including the belt driving apparatus 100 of the third embodiment, FIG. 7 and 8, the axial direction of the self-aligning roll body 241 and the axial direction (X direction) of the drive roll body 211 are the same direction. That is, the shaft 243 of the self-aligning roll main body 241 and the central shaft portion 213 of the driving roll main body 211 extend in parallel, but the shaft 243 of the automatic aligning roll main body 241 is connected to the driving roll main body 211. You may extend in the direction which intersects central axis part 213.
Further, in the conveyance device 1A including the belt driving device 100 according to the first embodiment described above, the sheet conveyance device conveys the belt-like sheet 4 arranged on the endless belt 3, but the belt-like sheet 4 is used. However, the present invention is not limited to this, and a device that carries and conveys an object to be conveyed on the endless belt 3 may be used. Further, the present invention can be applied not only to the conveying device but also to a belt driving device such as a timing belt.

  Further, the following belt driving device, a sheet conveying device provided with the belt driving device, or a sheet processing device is disclosed in the embodiment described above.

<1>
A belt driving device comprising a plurality of rolls and an endless belt wound around the plurality of rolls, and rotating the roll to circulate the endless belt,
The plurality of rolls comprises at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixed roll is a belt drive device arranged at a position adjacent to the upstream side of the drive roll via the endless belt.

<2>
The belt driving device according to <1>, wherein the fixed roll, the self-aligning roll, and the tension roll are arranged inside the endless belt, and the driving roll is arranged outside the endless belt. .
<3>
The belt driving device according to <1> or <2>, wherein the self-aligning roll is arranged at a position adjacent to the downstream side of the driving roll via the endless belt.
<4>
The belt driving device according to any one of <1> to <3>, wherein the tension roll is a roll that also serves as the self-aligning roll.
<5>
A sheet conveying device that includes the belt driving device according to any one of <1> to <4>, and conveys a belt-like sheet disposed on the endless belt,
The belt-like sheet is a sheet conveying device that is conveyed in a state of being pressed onto the peripheral surface of the drive roll by the endless belt.
<6>
A sheet conveying device for conveying a belt-like sheet wound around a plurality of rolls,
The plurality of rolls comprises at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the belt-shaped sheet,
The fixing roll is a sheet conveying device disposed at a position adjacent to the upstream side of the drive roll via the belt-like sheet.
<7>
The self-aligning roll is the sheet conveying apparatus according to <5> or <6>, wherein the automatic aligning roll is disposed at a position adjacent to the downstream side of the driving roll via the belt-shaped sheet.
<8>
The sheet conveying apparatus according to any one of <5> to <7>, wherein an axial direction of the fixed roll and an axial direction of the drive roll are the same direction.
<9>
The drive roll has a cylindrical drive roll main body that is rotationally driven in a predetermined direction,
The winding angle of the endless belt wound around the drive roll is 90 ° or more and 180 ° when 360 ° is the case where the endless belt contacts the entire circumference of the drive roll main body. Hereinafter, the sheet conveying apparatus according to any one of <5> to <8>, preferably 100 ° to 150 °.
<10>
The automatic alignment roll has a cylindrical automatic alignment roll main body rotating in the initial direction,
The winding angle of the endless belt wound around the self-aligning roll is 45 when the endless belt contacts with the entire circumference of the automatic centering roll main body in the circumferential direction. The sheet conveying apparatus according to any one of <5> to <9>, wherein the sheet conveying angle is not less than .degree. And not more than 270.degree.
<11>
The sheet transport device according to any one of <5> to <10>, wherein the belt-like sheet is a laminated sheet in which paper, a nonwoven fabric, and a resin film are laminated.

<12>
A sheet processing apparatus for processing a strip-shaped sheet placed on an endless belt wound around a plurality of rolls,
The processing on the sheet is at least one of sheet pressing, sealing between sheets, and sheet cutting,
The plurality of rolls comprises at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixed roll is disposed at a position adjacent to the upstream side of the drive roll via the endless belt,
A sheet processing apparatus that processes the belt-shaped sheet in a state of being pressed onto the peripheral surface of the drive roll by the endless belt.
<13>
The fixed roll, the self-aligning roll and the tension roll are arranged on the inner side of the endless belt, and the driving roll is arranged on the outer side of the endless belt,
The sheet processing apparatus according to <12>, wherein the belt-like sheet is conveyed in a state of being pressed onto the peripheral surface of the drive roll by the endless belt.
<14>
The automatic alignment roll is a sheet processing apparatus according to <12> or <13>, wherein the automatic alignment roll is disposed at a position adjacent to the downstream side of the drive roll via the belt-shaped sheet.
<15>
The sheet processing apparatus according to any one of <12> to <14>, wherein an axial direction of the fixed roll and an axial direction of the drive roll are the same direction.
<16>
The drive roll has a cylindrical drive roll main body that is rotationally driven in a predetermined direction,
The sheet according to any one of <12> to <15>, wherein the drive roll has an opening on the slit in the drive roll main body, and includes an irradiation head that irradiates laser light inside. Processing equipment.

<17>
A sheet conveying method comprising a conveying step of conveying a belt-like sheet arranged on an endless belt wound around a plurality of rolls,
The plurality of rolls used in the conveying step includes at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll.
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixing roll is a sheet conveying method arranged at a position adjacent to the upstream side of the drive roll via the endless belt.
<18>
The fixed roll, the self-aligning roll and the tension roll are arranged on the inner side of the endless belt, and the driving roll is arranged on the outer side of the endless belt,
In the transporting step, the sheet transporting method according to <17>, wherein the belt-shaped sheet is transported while being pressed onto the peripheral surface of the drive roll by the endless belt.
<19>
A sheet conveying method comprising a conveying step of conveying a belt-like sheet wound around a plurality of rolls,
The plurality of rolls used in the conveying step includes at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll.
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the belt-shaped sheet,
The fixing roll is a sheet conveyance method arranged at a position adjacent to the upstream side of the drive roll via the belt-like sheet.
<20>
The sheet feeding method according to any one of <17> to <19>, wherein the self-aligning roll is disposed at a position adjacent to the downstream side of the driving roll via the belt-shaped sheet.
<21>
The sheet conveying method according to any one of <17> to <20>, wherein the axial direction of the fixed roll and the axial direction of the drive roll are the same direction.

<22>
A sheet processing method comprising a processing step of processing a strip-shaped sheet placed on an endless belt wound around a plurality of rolls,
The processing performed on the sheet is at least one of sheet pressing, sheet sealing and sheet cutting,
The plurality of rolls used in the processing step includes at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixed roll is disposed at a position adjacent to the upstream side of the drive roll via the endless belt,
In the processing step, a sheet processing method for processing the belt-shaped sheet in a state where the endless belt is pressed onto the peripheral surface of the drive roll.
<23>
The sheet processing according to <22>, wherein the fixed roll, the self-aligning roll, and the tension roll are arranged inside the endless belt, and the driving roll is arranged outside the endless belt. Method.
<24>
The sheet processing method according to <22> or <23>, wherein the self-aligning roll is disposed at a position adjacent to the downstream side of the driving roll via the belt-shaped sheet.
<25>
The sheet processing method according to any one of <22> to <24>, wherein the axial direction of the fixed roll and the axial direction of the drive roll are the same direction.
<26>
The drive roll has a cylindrical drive roll main body that is rotationally driven in a predetermined direction,
The sheet according to any one of <22> to <25>, wherein the drive roll has an opening on the slit in the drive roll main body, and includes an irradiation head that irradiates laser light inside. Processing method.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

[Example 1]
A conveyance device 1A provided with the belt driving device 100 shown in FIG. 1 was prepared. In the belt driving device 100 shown in FIG. 1, the fixed roll 23 is arranged at a position adjacent to the upstream side in the transport direction (Y direction) of the driving roll 21 via the endless belt 3. However, it is arranged on the downstream side in the transport direction (Y direction) of the drive roll 21 via the endless belt 3. Further, a tension roll 25 that also serves as an automatic alignment roll is disposed above the drive roll 21. The transport speed of the endless belt 3 was 213 m / min, the tension of the endless belt 3 was adjusted to 2.5 N / mm, and the width of the endless belt 3 was 80 mm.

[Example 2]
A transport apparatus similar to that of the first embodiment is prepared except that the tension roll 25 that also serves as an automatic alignment roll disposed above the drive roll 21 is changed to a roll that is a fixed roll and also a tension roll. did.

Example 3
A transport apparatus similar to that of the first embodiment is used except that the automatic alignment roll 24 disposed on the downstream side in the transport direction (Y direction) of the drive roll 21 is changed to the fixed roll 23 via the endless belt 3. Prepared.

[Comparative Example 1]
A transport apparatus similar to that of the first embodiment is used except that the fixed roll 23 arranged on the upstream side in the transport direction (Y direction) of the drive roll 21 is changed to the automatic centering roll 24 via the endless belt 3. Prepared.

[Comparative Example 2]
The fixed roll 23 arranged on the upstream side in the transport direction (Y direction) of the drive roll 21 via the endless belt 3 is changed to an automatic centering roll 24, and further, the drive roll via the endless belt 3. A transport apparatus similar to that of Example 1 was prepared except that the self-aligning roll 24 disposed on the downstream side in the transport direction (Y direction) 21 was changed to a fixed roll 23.

[Comparative Example 3]
The fixed roll 23 arranged on the upstream side in the conveyance direction (Y direction) of the drive roll 21 is changed to an automatic alignment roll 24 via the endless belt 3, and is further disposed above the drive roll 21. A transport apparatus similar to that of Example 1 was prepared except that the tension roll 25 that also serves as an automatic centering roll was changed to a roll that was a fixed roll and also a tension roll.

[Comparative Example 4]
The fixed roll 23 arranged on the upstream side in the conveying direction (Y direction) of the drive roll 21 via the endless belt 3 is changed to an automatic alignment roll 24, and the drive roll 21 of the drive roll 21 is changed via the endless belt 3. A tension that also changes the automatic aligning roll 24 arranged on the downstream side in the transport direction (Y direction) to a fixed roll 23 and further serves as an automatic aligning roll disposed above the drive roll 21. A transport apparatus similar to that of Example 1 was prepared except that the roll 25 was changed to a roll that was a fixed roll and a tension roll.

[Performance evaluation]
The “meandering width” when the endless belt 3 was rotated using the conveyance devices of Examples 1 to 3 and Comparative Examples 1 to 4 was measured by the following method, and the measurement results are shown in Table 1 below. Moreover, the "metal sound" at the time of rotating the endless belt 3 using the conveying apparatus of Examples 1-3 and Comparative Examples 1-4 was evaluated with the following method, and the evaluation result was shown in following Table 1 .

<Meander width measurement>
A roll (a tension roll 25 in the transport device of the first embodiment) disposed above the drive roll 21 and a roll (the first embodiment) arranged on the downstream side in the transport direction (Y direction) of the drive roll 21. In the transport apparatus, a CCD transmission type digital laser sensor IG-028 manufactured by Keyence Corporation is arranged between the automatic alignment roll 24) and the axial direction (X direction) of the drive roll 21 in the endless belt 3 The position of the edge on the side opposite to the base end side was measured continuously for 30 seconds. And the maximum value of the fluctuation width of the edge position measured continuously for 30 seconds was measured as the meandering width.

<Evaluation of metal sound>
Evaluation of “metal sound” generated when the endless belt 3 was rotated using the conveyance devices of Examples 1 to 3 and Comparative Examples 1 to 4 was performed by sensory evaluation. Depending on the volume of the generated sound, the following points were assigned to evaluate the metal sound.
4 points: Metallic sound is very sounding.
3 points: Metallic sound is slightly sounding.
2 points: A little metal sound is heard.
1 point: There is almost no metal sound.
When the metal sound is evaluated, the large metal sound is considered to be caused by contact between the side end portion of the endless belt 3 and the roll flange due to the unbalance of the force applied in the width direction of the endless belt 3. It is done. That is, the smaller the metal sound evaluation point, the better the balance of forces applied in the width direction of the endless belt 3.
Therefore, meandering is suppressed as the meandering width of the endless belt 3 is smaller and the metal sound evaluation point is smaller.

As is clear from the results shown in Table 1, the “meandering width” when the endless belt 3 is rotated is suppressed in the conveyance devices of Examples 1 to 3 compared to the conveyance devices of Comparative Examples 1 to 4. I found out. Moreover, the conveyance apparatus of Examples 1-3 compared with the conveyance apparatus of Comparative Examples 1-4, and the evaluation of the "metal sound" at the time of rotating the endless belt 3 was favorable. In other words, as in the first to third embodiments, the fixed roll 23 is arranged at a position adjacent to the upstream side in the transport direction (Y direction) of the drive roll 21 via the endless belt 3, thereby making a comparative example. The meandering can be suppressed as compared with the configuration in which the self-aligning roll 24 is disposed at the position adjacent to the upstream side in the conveyance direction (Y direction) of the drive roll 21 via the endless belt 3 as in 1-4. I understood. Further, as in Examples 1 and 2, the self-aligning roll 24 is disposed on the downstream side in the transport direction (Y direction) of the drive roll 21 via the endless belt 3, thereby evaluating “metal sound”. It was found that the balance of the force applied in the width direction of the endless belt 3 was improved. Therefore, if the belt-shaped sheet 4 is transported using the transport devices of Examples 1 to 3, it can be expected that the belt-shaped sheet 4 is prevented from meandering, and the belt-shaped sheet 4 transported by the endless belt 3 can be stably conveyed. It can be expected to be processed.

DESCRIPTION OF SYMBOLS 100 Belt drive apparatus 1A, 1B Conveyor apparatus 1C Processing apparatus 2 Roll 21 Drive roll 211 Drive roll main-body part 212 Fixed plate 213 Center axis part 214 Flange 22 Driven roll 23 Fixed roll 231 Fixed roll main-body part 232 Fixed plate 234 Flange 24 Automatic adjustment Core roll 241 Automatic alignment roll main body 243 Shaft 244 Flange 245 Screw 25 Tension roll 251 Automatic alignment roll main body 253 Shaft 254 Flange 3 Endless belt 4 Belt-like sheet 5 Self-aligning roller bearing 51 Inner ring portion 52 Roller 53 Concave 54 Holder 6 Laser light 61 Irradiation head 62 Mirror 63 Lens 400 Pants-type disposable diaper

Claims (11)

A belt-shaped belt having a plurality of rolls and an endless belt wound around the plurality of rolls, and having a belt driving device that rotates the roll to circulate the endless belt, and is disposed on the endless belt A sheet conveying apparatus for conveying a sheet of
The plurality of rolls comprises at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixed roll is disposed at a position adjacent to the upstream side of the drive roll via the endless belt,
The belt-like sheet is a sheet conveying device that is conveyed in a state of being pressed onto the peripheral surface of the drive roll by the endless belt. The sheet conveying apparatus according to claim 1, wherein the fixed roll, the self-aligning roll, and the tension roll are arranged inside the endless belt, and the driving roll is arranged outside the endless belt. . 3. The sheet conveying device according to claim 1, wherein the self-aligning roll is disposed at a position adjacent to the downstream side of the driving roll via the endless belt . A belt-shaped belt having a plurality of rolls and an endless belt wound around the plurality of rolls, and having a belt driving device that rotates the roll to circulate the endless belt, and is disposed on the endless belt A sheet processing apparatus for processing a sheet of
The plurality of rolls comprises at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixed roll is disposed at a position adjacent to the upstream side of the drive roll via the endless belt,
The processing on the sheet is at least one of sheet pressing, sealing between sheets, and sheet cutting,
A sheet processing apparatus that processes the belt-shaped sheet in a state of being pressed onto the peripheral surface of the drive roll by the endless belt. A sheet conveying device for conveying a belt-like sheet wound around a plurality of rolls,
The plurality of rolls comprises at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the belt-shaped sheet,
The fixing roll is a sheet conveying device disposed at a position adjacent to the upstream side of the drive roll via the belt-like sheet. The sheet conveying device according to claim 5 , wherein the self-aligning roll is disposed at a position adjacent to the downstream side of the driving roll via the belt-shaped sheet. A sheet conveying method comprising a conveying step of conveying a belt-like sheet arranged on an endless belt wound around a plurality of rolls,
The plurality of rolls used in the conveying step includes at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll.
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixed roll is disposed at a position adjacent to the upstream side of the drive roll via the endless belt ,
The fixed roll, the self-aligning roll and the tension roll are arranged on the inner side of the endless belt, and the driving roll is arranged on the outer side of the endless belt,
In the transporting step, a sheet transporting method in which the belt-shaped sheet is transported while being pressed onto the peripheral surface of the drive roll by the endless belt . A sheet conveying method comprising a conveying step of conveying a belt-like sheet wound around a plurality of rolls,
The plurality of rolls used in the conveying step includes at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll.
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the belt-shaped sheet,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the belt-shaped sheet,
The fixing roll is a sheet conveyance method arranged at a position adjacent to the upstream side of the drive roll via the belt-like sheet. The sheet conveying method according to claim 8 , wherein the self-aligning roll is disposed at a position adjacent to the downstream side of the drive roll via the belt-shaped sheet. A sheet processing method comprising a processing step of processing a strip-shaped sheet placed on an endless belt wound around a plurality of rolls,
The processing performed on the sheet is at least one of sheet pressing, sheet sealing and sheet cutting,
The plurality of rolls used in the processing step includes at least one driving roll to be driven and a plurality of driven rolls driven by the driving roll,
At least one of the plurality of driven rolls is a fixed roll whose peripheral surface does not swing according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is an automatic centering roll whose peripheral surface swings according to the tension in the width direction of the endless belt,
At least one of the plurality of driven rolls is a tension roll that adjusts the tension of the endless belt,
The fixed roll is disposed at a position adjacent to the upstream side of the drive roll via the endless belt,
In the processing step, a sheet processing method for processing the belt-shaped sheet in a state where the endless belt is pressed onto the peripheral surface of the drive roll. The sheet processing method according to claim 10 , wherein the self-aligning roll is disposed at a position adjacent to the downstream side of the driving roll via the belt-shaped sheet.

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