JP2015117106A - Web conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web conveying device which can set a plurality of roll-like original fabrics.SOLUTION: A web conveying device includes: a first feeding shaft on which a first original fabric is set, a second feeding shaft on which a second original fabric is set, and a differential arranged on the opposite side to the first feeding shaft with respect to the second feeding shaft. The first feeding shaft and the second feeding shaft are coaxially arranged, one side gear of the differential is connected to the second feeding shaft. The first feeding shaft extends and passes through a hollow space of the second feeding shaft and a hollow space of the one side gear, and is connected to the other side gear. A housing for housing the two side gears and a pinion gear is connected to a drive shaft. A lock element is arranged between the housing and the second feeding shaft so that it suppresses mutual rotation until a torque load difference of a predetermined value or more is generated between the first feeding shaft and the second feeding shaft, and does not suppress the mutual rotation after the torque load difference of the predetermined value or more is generated.

Description

  The present invention relates to a web conveyance device.

  With reference to FIG. 11, a gravure printing machine including a conventional web conveyance device will be described. FIG. 11 is a schematic diagram showing an example of the configuration of a conventional gravure printing machine. As shown in FIG. 11, the gravure printing machine includes a feeding unit 502, an infeed unit 503, a printing unit 504, an outfeed unit 505, and a winding unit 506. A roll-shaped original fabric 500 is set on the feeding shaft of the feeding unit 502. As the feed shaft is driven, a web (printing object such as paper, plastic film, metal foil, etc.) 501 is fed to the in-feed unit 503 from the roll-shaped raw material. The web 501 to be fed is fed to the printing unit 504 via the infeed unit 503, and printing processing is performed in the printing unit 504. Thereafter, the sheet is discharged via the outfeed unit 505 and is wound by the winding unit 506.

  FIG. 12 is a schematic diagram for explaining the feeding mechanism unit of a conventional printing machine in more detail. 12 feeds and feeds a feed shaft 510 on which a roll-shaped original fabric 500 is set and a web 501 fed from the roll-shaped original fabric 500 by the feed shaft 510. Nip roller 511. The nip roller 511 includes a driving roller 512 that is rotationally driven, and a rubber roller 513 that is disposed to face the driving roller 512 and presses the web 501 with the driving roller 512. After the roll-shaped original fabric 500 is set on the feeding shaft 510, the web 501 is fed from the roll-shaped original fabric 500 by the rotation of the feeding shaft 510. The web 501 to be fed is conveyed while being sandwiched between the drive roller 512 and the rubber roller 513. Here, the tension of the web 501 to be fed is controlled by adjusting the rotation speed of the feed shaft 510 and the rotation speed of the drive roller 512.

  Furthermore, with reference to FIG. 13, the relationship between the tension | tensile_strength of a web and the diameter of a roll-shaped original fabric is demonstrated. FIG. 13 is a schematic diagram for explaining the relationship between the roll-shaped raw fabric diameter and the web tension.

  As shown in FIG. 13, in a feeding mechanism portion of a conventional printing apparatus, a roll-shaped raw fabric having a relatively large diameter ra and a roll-shaped original having a relatively small diameter rb. Consider the case where both are set on the same feed shaft 510. In this case, the web 501a (corresponding to the diameter ra) and the web 501b (corresponding to the diameter rb) fed from each original fabric by the rotation of the feeding shaft 510 are held in common by the drive roller 512 and the rubber roller 513. It will be transported. Here, since the angular velocity ω of each original fabric and the angular velocity ω of the feeding shaft 510 are naturally the same, the feeding velocity Va of the web 501a fed from the raw fabric having a large diameter ra has a smaller diameter rb. It becomes faster than the feeding speed Vb of the web 501b fed from the original fabric. Therefore, the web 501a is slackened and tension is not applied, and the web 501a cannot be fed properly, or the web 501b is excessively tensioned and the web 501b is broken.

  On the other hand, a wide roll-shaped raw material is set on the feed shaft, the web is divided using a slitter device or the like in the processing step, and the plurality of divided webs are simultaneously wound in parallel. Such a web conveyance device is known (Patent Document 1). However, there is no known web conveyance device that can set a plurality of roll-shaped original fabrics.

Japanese Patent No. 3567211

  The present invention has been devised to pay attention to the above problems and to effectively solve them. The objective of this invention is providing the web conveyance apparatus which can set several roll-shaped original fabric.

  The present applicant has already proposed a web conveyance device capable of simultaneously feeding webs from a plurality of original fabrics (Japanese Patent Application No. 2011-194983). The present invention is a further improvement of the invention.

  The present invention provides a first feed shaft on which a roll-shaped first original fabric is set, a second feed shaft having a hollow space on which a roll-shaped second original fabric is set, and the second feed A differential device disposed on the opposite side of the first feed shaft with respect to the shaft and a web fed from the roll-shaped first original fabric and the roll-shaped second original fabric are sandwiched in common. And the first feeding shaft and the second feeding shaft are arranged coaxially, and the second feeding shaft side of the two side gears of the differential device The side gear is provided with a hollow space and is connected to the second feeding shaft, and the first feeding shaft has a hollow space of the second feeding shaft and the second feeding shaft. Extends through the hollow space of the connected side gear and is connected to the other side gear of the differential, A housing of the differential device that houses two side gears and the pinion gear of the differential device and rotatably supports the pinion gear is connected to the drive shaft, and the housing revolves by the rotation of the drive shaft. Between the housing of the differential device and the second feed shaft until a torque load difference of a predetermined value or more occurs between the first feed shaft and the second feed shaft. A lock element that suppresses rotation and does not suppress rotation relative to each other after a torque load difference of a predetermined value or more occurs between the first feed shaft and the second feed shaft is provided. It is a web conveyance device.

  According to the present invention, it is possible to allow a difference in angular velocity between the feeding shafts on which the two roll-shaped original fabrics are set, and therefore there is a difference between the diameters of the two roll-shaped original fabrics. Also, the tension of each web can be suitably controlled. For this reason, the web conveyance apparatus which can be fed simultaneously from two roll-shaped original fabrics and can endure practical use is realizable.

  Further, according to the present invention, the lock element is set on each feed shaft in order to suppress rotation with respect to each other until a torque load difference of a predetermined value or more occurs between the first feed shaft and the second feed shaft. In a state where the two roll-shaped original fabrics are free (state where the web is not tensioned), it is suppressed that the respective original fabrics are rotated by disturbance. This effect is remarkably useful when maintaining the bonding position of a new original fabric so as not to shift during web splicing. In addition, since the lock element does not suppress the rotation with respect to each other after a torque load difference of a predetermined value or more is generated between the first feeding shaft and the second feeding shaft, the first feeding shaft and the second feeding shaft are not controlled during printing. It is possible to prevent a problem that the brake is always applied between the feed shafts, and a tension difference is generated between the plurality of webs according to the braking force.

  Preferably, a plurality of the locking elements are provided substantially equally in the circumferential direction. In this case, since the locking elements can be acted in a balanced manner in the circumferential direction, the effect of suppressing the rotation between the first feeding shaft and the second feeding shaft can be sufficiently provided.

  Specifically, for example, the locking element includes a rotating member rotatably provided on an end surface of the housing on the second feeding shaft side, and is fixed to the rotating member and the second feeding member. A pad member capable of contacting the outer peripheral surface of the feed shaft, and the second feed until a torque load difference of a predetermined value or more occurs between the first feed shaft and the second feed shaft. The state in which the pad member is in contact with the outer peripheral surface of the shaft is maintained, the rotation with respect to each other is suppressed, and a torque load difference of a predetermined value or more is generated between the first feeding shaft and the second feeding shaft. After that, the state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft is eliminated, and rotation with respect to each other is not suppressed. In this case, the pad member is made of rubber or resin, for example.

  In this case, preferably, a contact member that contacts the end surface of the housing on the second feeding shaft side is fixed to the rotating member, and the end surface of the housing on the second feeding shaft side is fixed. Among these, the state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft is maintained on an arc path on which the contact position of the contact member moves while the rotation member is rotating. The locking recess into which the contact member is fitted when the contact member is engaged, and the unlocking member into which the contact member is fitted when the state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft is resolved Each of the recesses is provided. According to such an aspect, when the state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft is resolved, the contact member is fitted into the unlocking recess, and thereafter the rotation member Can be prevented from rotating due to disturbance and the pad member coming into contact with the outer peripheral surface of the second feeding shaft again. In addition, when the pad member is kept in contact with the outer peripheral surface of the second feeding shaft, the contact member is fitted into the locking recess, so that the rotation member is rotated by disturbance. The problem that the pad member is separated from the outer peripheral surface of the second feeding shaft can be prevented more reliably.

  Alternatively, an abutting member that abuts the rotating member is fixed to an end surface of the housing on the second feeding shaft side, and the rotating member of the rotating member is being rotated during the rotation of the rotating member. On the circular arc path on which the contact position of the contact member moves, the lock member is fitted when the pad member is maintained in contact with the outer peripheral surface of the second feed shaft. A recess and an unlock recess into which the contact member fits when the state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft are eliminated may be provided. Even in such a mode, when the state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft is resolved, the contact member is fitted into the unlocking recess, and then the rotating member is It is possible to prevent the problem that the pad member is rotated by a disturbance and the pad member comes into contact with the outer peripheral surface of the second feeding shaft again. In addition, when the pad member is kept in contact with the outer peripheral surface of the second feeding shaft, the contact member is fitted into the locking recess, so that the rotation member is rotated by disturbance. The problem that the pad member is separated from the outer peripheral surface of the second feeding shaft can be prevented more reliably.

  Preferably, the first feeding shaft is connected to a first original fabric setting portion on which the first original fabric is set and a side gear of the differential device and extends to the outside of the housing. And a second feed shaft is connected to a side gear of the differential device and to the outside of the housing. A second connecting portion extending to the first feedstock set, wherein the locking element is provided between the housing and the second connecting portion of the second feeding shaft. The part can be attached to and detached from the first connection part in a plug-in form, and the second original fabric set part can also be attached to and detached from the second connection part in a plug-in form. Yes.

  In this specification, the plug-in type is a so-called insertion type, that is, the convex part provided on one member (for example, the first original fabric set portion) of the two members is the other member. This is a method in which the two members are joined by being inserted into a corresponding concave portion provided in (for example, the first connection portion).

  According to such an aspect, the attachment and detachment of the first original fabric set portion and the attachment and detachment of the second original fabric set portion can be performed quickly and easily. In addition, when the first original fabric set portion is removed from the first connection portion and the second original fabric set portion is removed from the second connection portion, the gap between the housing of the differential device and the second feed shaft is determined. Since the provided locking element is exposed to the outside, it becomes easier to access the locking element, for example to replace a worn locking element.

  According to the present invention, it is possible to allow a difference in angular velocity between the feeding shafts on which the two roll-shaped original fabrics are set, and therefore there is a difference between the diameters of the two roll-shaped original fabrics. Also, the tension of each web can be suitably controlled. For this reason, the web conveyance apparatus which can be fed simultaneously from two roll-shaped original fabrics and can endure practical use is realizable.

  Further, according to the present invention, the lock element is set on each feed shaft in order to suppress rotation with respect to each other until a torque load difference of a predetermined value or more occurs between the first feed shaft and the second feed shaft. In a state where the two roll-shaped original fabrics are free (state where the web is not tensioned), it is suppressed that the respective original fabrics are rotated by disturbance. This effect is remarkably useful when maintaining the bonding position of a new original fabric so as not to shift during web splicing. In addition, since the lock element does not suppress the rotation with respect to each other after a torque load difference of a predetermined value or more is generated between the first feeding shaft and the second feeding shaft, the first feeding shaft and the second feeding shaft are not controlled during printing. It is possible to prevent a problem that the brake is always applied between the feed shafts, and a tension difference is generated between the plurality of webs according to the braking force.

FIG. 1 is a schematic view showing a web conveyance device according to an embodiment of the present invention. FIG. 2 is an enlarged schematic view illustrating a feeding unit of the web conveyance device of FIG. FIG. 3 is a schematic diagram for explaining the configuration of the feeding shaft portion of the web conveyance device of FIG. 2. FIG. 4 is a schematic view showing a state where the first original fabric set portion is removed from the first connection portion and the second original fabric set portion is removed from the second connection portion in the feeding shaft portion of FIG. 3. . FIG. 5 is a schematic view in a state in which the pad member of the lock element is in contact with the outer peripheral surface of the second feeding shaft when the feeding shaft portion of FIG. 3 is viewed from the axial direction. FIG. 6 is a schematic view in a state where the pad member of the lock element is separated from the outer peripheral surface of the second feeding shaft when the feeding shaft portion of FIG. 3 is viewed from the axial direction. FIG. 7 is an enlarged schematic view showing the locking element of FIG. 8 is a cross-sectional view taken along line AA of the locking element of FIG. FIG. 9 is an enlarged schematic view showing another example of the locking element of FIG. 10 is a cross-sectional view taken along line BB of the locking element of FIG. FIG. 11 is a schematic diagram showing an example of the configuration of a conventional gravure printing machine. FIG. 12 is a schematic diagram for explaining a feeding mechanism of a conventional printing press. FIG. 13 is a schematic diagram for explaining the relationship between the roll-shaped raw fabric diameter and the web tension.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic view showing a web conveyance device according to an embodiment of the present invention.

  As shown in FIG. 1, the web conveyance device 1 according to the present embodiment includes a feeding unit 20, an infeed unit 30, a printing unit 40, an outfeed unit 50, and a winding unit 60. Yes. And the roll-shaped original fabric is set to the feeding shaft of the feeding unit 20. As the feed shaft is driven, a web (printing object such as paper, plastic film, metal foil, etc.) is fed to the in-feed unit 30 from the roll-shaped raw material. The web to be fed is fed to the printing unit 40 via the infeed unit 30, and printing processing is performed in the printing unit 40. Thereafter, the paper is discharged through the outfeed unit 50 and wound up by the winding unit 60.

  FIG. 2 is an enlarged schematic view showing the feeding unit 20 of the web conveyance device 1 of FIG.

  As shown in FIG. 2, the web conveyance device 1 according to the present embodiment includes a first feeding shaft portion 20a in which two roll-shaped original fabrics 10a and 10b are set coaxially in the axial direction, and the first feeding shaft. And a nip roller 80 for commonly holding and transporting the webs 11a and 11b fed from the two roll-shaped original fabrics 10a and 10b set on the feed shaft portion 20a. The first feed shaft portion 20a is driven by the first feed shaft portion rotation drive portion 13a.

  As shown in FIG. 2, the nip roller 80 includes a driving roller 82 that is rotationally driven, a rubber roller 83 that is disposed to face the driving roller 82 and presses the webs 11 a and 11 b with the driving roller 82, and have. The driving roller 82 and the rubber roller 83 are supported so as to be rotatable about a horizontal axis perpendicular to the conveying direction of the webs 11a and 11b. Further, the nip roller 80 is driven by a nip roller driving unit 81.

  Moreover, as shown in FIG. 2, the web conveyance apparatus 1 of this Embodiment is the 1st by which two new roll-shaped original fabrics 10a 'and 10b' are coaxially set to an axial direction for web splicing operation. 2 feed shaft portion 20b, a cutting portion 61 that cuts the two webs 11a and 11b being conveyed between the first feed shaft portion 20a and the nip roller 80 in the width direction, the cutting portion 61 and the nip roller 80, And a paster nip roller 62 that presses the webs 11a and 11b being conveyed against two new original fabrics 10a 'and 10b' set on the second feeding shaft portion 20b. The second feed shaft portion 20b is driven by the second feed shaft portion rotation drive portion 13b. Web splicing paste P is attached in advance to the tip portions (new web tip portions) of the two new roll-shaped original fabrics 10a ′ and 10b ′ set on the second feeding shaft portion 20b. Yes.

  Specifically, the paster nip roller 62 is supported by a paster main body 63 fixed to an apparatus housing (not shown) via a paster nip roller moving mechanism 65. The pasta nip roller moving mechanism 65 causes the pasta nip roller 62 to width the webs 11a and 11b being conveyed toward the two roll-shaped original fabrics 10a ′ and 10b ′ set on the second feeding shaft portion 20b. It is designed to press in the direction all at once.

  On the other hand, the cutting part 61 is also supported by the paster body part 63 via the cutting part moving mechanism 64. By the cutting part moving mechanism 64, the cutting part 61 can come into contact with the webs 11a and 11b fed from the first feeding shaft part 20a all at once in the width direction. The cutting part 61 can cut the webs 11a and 11b all at once in the width direction.

  The first feeding shaft rotation driving unit 13a, the nip roller driving unit 81, the second feeding shaft rotation driving unit 13b, the cutting unit moving mechanism 64, and the paster nip roller moving mechanism 65 are linked to each other. The communication unit is connected to a control unit 90 for control. In particular, during the web splicing operation, the control unit 90 controls the second feed shaft portion rotation drive unit 13b, and roll-shaped raw fabric 10a ′ set on the second feed shaft portion 20b, 10b ′ starts to rotate, and the webs 11a and 11b being conveyed by the first feed shaft portion rotation driving unit 13a and the nip roller driving unit 81 are set to the outermost web speed of the roll-shaped original fabrics 10a ′ and 10b ′. After that, it is made to substantially coincide with the conveying speed of the sheet, and thereafter, pressing by the paster nip roller 62 is performed. And the timing of the web cutting | disconnection by the cutting part 61 is determined according to the rotation phase position of the paste P for web splicing. For this reason, the 2nd feeding shaft part rotation drive part 13b can recognize the rotation phase position of paste P for web splicing correctly.

  Moreover, in the web conveyance apparatus 1 shown in FIG. 2, the 1st feed shaft part 20a and the 2nd feed shaft part 20b are the same structures, and themselves can be mutually replaced by the known turret mechanism 19. ing.

  In the illustrated example, the turret mechanism 19 includes a column 42 that pivotally supports the rotation shaft 41 and a rotation motor 43 that rotationally drives the rotation shaft 41. One feed shaft portion support arm 12a is fixed to the rotation shaft 41 on the base end side, and rotatably supports both ends of the first feed shaft portion 20a on the distal end side. Similarly, a pair of second feeding shaft portion support arms 12b are fixed to the rotating shaft 41 at their proximal ends, and support both end portions of the second feeding shaft portion 20b at their distal ends so as to be rotatable. doing. The first feed shaft portion support arm 12 a and the second feed shaft portion support arm 12 b are disposed so as to form an angle of 180 ° in the rotation direction of the rotation shaft 41.

  A pair of first support roll support arms 44 are fixed to the rotating shaft 41 at their proximal ends, and rotatably support the first support roll 45 at their distal ends. Further, the pair of first support roll support arms 44 form an angle of 90 ° with respect to the first feed shaft support arm 12 a in the rotation direction of the rotation shaft 41. Similarly, a pair of second support roll support arms 46 are fixed to the rotating shaft 41 at their proximal ends, and support the second support roll 47 at their distal ends so as to be rotatable. Further, the pair of second support roll support arms 46 form an angle of 90 ° with respect to the second feed shaft support arm 12b in the rotation direction of the rotation shaft 41.

  The first feed shaft portion support arm 12a is provided with a first feed shaft portion rotation drive portion 13a for driving the rotation of the first feed shaft portion 20a on the distal end side of the first feed shaft portion support arm 12a. A second feed shaft portion rotation drive unit 13b that drives the rotation of the second feed shaft portion 20b is provided on the distal end side of 12b.

In the present embodiment, the configuration of the first feeding shaft portion 20a and the configuration of the second feeding shaft portion 20b are the same as each other, and hereinafter, the configuration of the first feeding shaft portion 20a will be described as a representative. .
FIG. 3 is a schematic diagram for explaining the configuration of the first feeding shaft portion 20a of the web conveyance device 1 according to the present embodiment.

  As shown in FIG. 3, in the web conveyance device 1 of the present embodiment, a first feeding shaft 21a on which a roll-shaped first original fabric 10a is set and a roll-shaped second original fabric 10b are set. A second feed shaft 21b having a hollow space, a differential device 22 disposed on the opposite side of the first feed shaft 21a with respect to the second feed shaft 21b, and a first through the differential device 22. And a drive shaft 27 that rotates the feed shaft 21a and the second feed shaft 21b.

  Roll-shaped original fabrics 10a and 10b having various widths can be set on the first feeding shaft 21a and the second feeding shaft 21b. The first feeding shaft 21a and the second feeding shaft 21b are arranged coaxially and are connected to the side gears 23a and 23b of the differential device 22, respectively. Accordingly, the side gears 23a and 23b, the first feeding shaft 21a and the second feeding shaft 21b, and the first original fabric 10a and the second original fabric 10b can be rotated integrally with each other. ing.

  More specifically, as shown in FIG. 3, the second feed shaft 21b and the side gear 23b connected to the second feed shaft 21b (the side gear 23b on the second feed shaft 21b side) are respectively hollow spaces. have. The first feeding shaft 21a extends through the hollow space of the second feeding shaft 21b and the hollow space of the side gear 23b, and the portion extending to the other side (left side in FIG. 3) of the side gear 23b is the other side. The side gear 23a is connected.

  On the other hand, the other end portion (the right end portion in FIG. 3) of the first feed shaft 21a is rotatable by a freely rotating support shaft member 28 fixed to the first feed shaft portion support arm 12a. It is supported. The end portion of the first feeding shaft 21a and the support shaft member 28 are joined together by pressing a concave fitting portion and a convex fitting portion formed in a truncated conical shape, respectively. . With such a configuration, the first feeding shaft 21a is stably supported.

  A plurality of radial bearings 29 are fitted in the hollow space of the second feed shaft 21b, and the second feed shaft 21b is stably supported by the first feed shaft 21a.

  In the present embodiment, as shown in FIG. 3, the first feeding shaft 21 a is connected to the first original fabric setting portion 211 a on which the roll-shaped first original fabric 10 a is set and the side gear 23 a of the differential device 22. And a first connection portion 212 a that is connected and extends to the outside of the housing 26 of the differential device 22. Similarly, the second feeding shaft 21b is connected to the second original fabric setting portion 211b on which the roll-shaped second original fabric 10b is set and the side gear 23b of the differential device 22 and the housing of the differential device 22 26, and a second connection portion 212b extending to the outside of the H.26. And as shown in FIG. 4, the 1st original fabric set part 211a is detachable with the plug-in form with respect to the 1st connection part 212a, and the 2nd original fabric set part 211b is also 2nd connection. It can be attached to and detached from the part 212b in a plug-in format. Thus, for example, when a new roll-shaped original fabric is set on the first original fabric setting portion 211a and the second original fabric setting portion 211b, the first original fabric setting portion 211a and the second original fabric setting portion 211b are attached and detached. Can be done quickly and easily.

  As shown in FIG. 3, the differential device 22 includes side gears 23a and 23b connected to the first feed shaft 21a and the second feed shaft 21b, respectively, and a rotation shaft orthogonal to the rotation shafts of the side gears 23a and 23b. And a pair of pinion gears 24 that mesh with the side gears 23a and 23b, and a housing 26 that houses the side gears 23a and 23b and the pair of pinion gears 24. The pair of pinion gears 24 are pivotally supported by a pinion shaft 25 fixed to the inner surface of the housing 26. That is, the pair of pinion gears 24 are rotatably supported by the housing 26 via the pair of pinion shafts 25.

  In the illustrated example, the side gears 23 a and 23 b and the pair of pinion gears 24 are configured as bevel gears, and the side gears 23 a and 23 b mesh with the pair of pinion gears 24 at right angles. With such a configuration, the pair of pinion gears 24 absorbs a rotational speed difference (angular speed difference) between one side gear 23a and the other side gear 23b.

  The drive shaft 27 is coaxial with the first feed shaft 21 a and the second feed shaft 21 b, and one end of the drive shaft 27 is connected to the housing 26 of the differential device 22. On the other hand, the other end of the drive shaft 27 is connected to the aforementioned first feed shaft portion rotation drive unit 13a, and is driven to rotate by the driving force from the first feed shaft portion rotation drive unit 13a. It has become.

  In the present embodiment, as shown in FIG. 3, a predetermined value or more is provided between the housing 26 of the differential 22 and the second feed shaft 21b, and between the first feed shaft 21a and the second feed shaft 21b. The lock element 70 is configured to suppress rotation with respect to each other until a torque load difference of 10 mm occurs, and to prevent rotation with respect to each other after a torque load difference of a predetermined value or more occurs between the first feed shaft 21 a and the second feed shaft 21 b. Is provided.

  As shown in FIGS. 5 and 6, a plurality of locking elements 70 according to the present embodiment are provided substantially equally in the circumferential direction (in the example shown, each of the locking elements 70 is at a position equally divided into three in the circumferential direction. Provided). As a result, the lock element 70 can be acted in a well-balanced manner in the circumferential direction, so that the effect of suppressing the rotation between the first feeding shaft 21a and the second feeding shaft 21b can be sufficiently provided. ing.

  FIG. 7 is an enlarged schematic view showing one locking element 70. 8 is a cross-sectional view taken along line AA of the locking element 70 of FIG.

  As shown in FIGS. 7 and 8, the locking element 70 of the present embodiment includes a rotating member 72 that is rotatably provided on an end surface of the housing 26 on the second feeding shaft 21 b side, and the rotating member. And a pad member 71 fixed to 72 and capable of contacting the outer peripheral surface of the second feeding shaft 21b (second connecting portion 212b).

  More specifically, as shown in FIG. 7, a rotation shaft 73 parallel to the axial direction of the second feed shaft 21b is provided upright on the end surface of the housing 26 on the second feed shaft 21b side. The moving member 72 is pivotally supported by the rotation shaft 73 so as to be rotatable.

  In the present embodiment, the pad member 71 is made of rubber, but is not particularly limited as long as it is a material that increases the frictional force with respect to the outer peripheral surface of the second connection portion 212b. For example, the pad member 71 may be made of resin. Further, the pad member 71 may be made of a material that is in contact with the outer peripheral surface of the second connection portion 212 b and a material that is a connection portion between the rotating member 72. In the illustrated example, the pad member 71 has a rectangular parallelepiped shape, but the shape of the pad member 71 is not limited to this. If the shape is wider as it is closer to the outer peripheral surface of the second connection portion 212b, a frictional force can be reliably applied to the outer peripheral surface of the second connection portion 212b, which is more preferable.

  Further, in the illustrated example, a recess is provided in the lower end portion of the rotating member 72, and the upper end portion of the pad member 71 is inserted into the recess. The pad member 71 is fixed to the rotating member 72 by inserting the pin-shaped fixing member 75 so as to penetrate the lower end portion of the rotating member 72 and the upper end portion of the pad member 71 in the left-right direction. Has been.

  With such a configuration, as shown in FIG. 5, the lock element 70 has the second feeding shaft until a torque load difference of a predetermined value or more occurs between the first feeding shaft 21 a and the second feeding shaft 21 b. The state in which the pad member 71 is in contact with the outer peripheral surface of 21b is maintained, the rotation with respect to each other is suppressed, and a predetermined value is provided between the first feeding shaft 21a and the second feeding shaft 21b as shown in FIG. After the torque load difference is generated, the rotation member 72 is rotated by the torque load difference, so that the state where the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is eliminated. Thus, the rotation with respect to each other is not suppressed. The “predetermined value” in the present embodiment is a value determined by parameters such as the number of lock elements 70, the size and hardness of the pad member 71 of each lock element 70, and the depth of a lock recess 761 described later. Each parameter is adjusted in advance to an appropriate value based on the experimental result and the like.

  In the present embodiment, as shown in FIG. 8, a contact member 74 that is in contact with the end surface of the housing 26 on the second feed shaft 21 b side is fixed to the rotating member 72. In the illustrated example, the contact member 74 is fixed to the rotating member 72 on the opposite side of the rotating shaft 73 from the pad member 71.

  As the contact member 74, for example, a ball plunger is used. In the present embodiment, as shown in FIG. 8, the tip end portion 74a having a spherical shape of the contact member 74 is supported by the contact member main body 74c via an elastic body 74b that can expand and contract in the axial direction. The elastic body 74b absorbs the action of the reaction force received by the distal end portion 74a, so that damage to the distal end portion 74a is suppressed.

  As shown in FIG. 7, the arc path C in which the contact position of the contact member 74 moves during the rotation of the rotation member 72 on the end surface of the housing 26 of the differential device 22 on the second feeding shaft 21 b side. Above, a lock recess 761 into which the contact member 74 is fitted when the pad member 71 is maintained in contact with the outer peripheral surface of the second feed shaft 21b (second connection portion 212b), and 2 Unlock recesses 762 and 763 into which the contact member 74 is fitted when the state in which the pad member 71 is in contact with the outer peripheral surface of the two feeding shafts 21b are eliminated.

  As shown in FIG. 7, the unlock recesses 762 and 763 are provided on the left and right sides of the lock recess 761, respectively. When the rotating member 72 rotates clockwise and the state where the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is eliminated, the tip end portion 74a of the contact member 74 is unlocked on the right side. It fits in the recess 762 for use. On the other hand, when the rotation member 72 rotates counterclockwise and the state where the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is eliminated, the contact member 74 is used for unlocking the left side. It is adapted to be fitted into the tip 74 a of the recess 763.

  The contact member 74 is fitted into the unlocking depression 762 or 763 when the rotation member 72 is rotated and the state where the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is resolved. Thus, it is possible to prevent the problem that the rotating member 72 is subsequently rotated due to disturbance and the pad member 71 comes into contact with the outer peripheral surface of the second feeding shaft 21b again.

  In addition, when the state in which the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is maintained, the contact member 74 is fitted into the locking recess 761, so that the rotating member 72 is disturbed thereafter. Therefore, the problem that the pad member 71 is separated from the outer peripheral surface of the second feeding shaft 21b can be prevented more reliably. Further, when the operator manually rotates the rotation member 72 to bring the pad member 71 into contact with the outer peripheral surface of the second feeding shaft 21b, the contact member 74 is fitted into the locking recess 761. By detecting this slight vibration, the operator can confirm that a certain contact state has been obtained.

  A shallow groove is formed on the end surface of the housing 26 of the differential device 22 on the second feeding shaft 21b side along the circular arc path C along which the contact position of the contact member 74 moves while the rotation member 72 rotates. May be formed. In this case, the abutting member 74 can be moved more smoothly on the arc path C by being guided by the shallow groove while the rotating member 72 is rotating.

Next, the operation of the present embodiment having such a configuration will be described.
As shown in FIG. 2, the web from the two roll-shaped raw fabrics 10 a and 10 b set on the first feeding shaft portion 20 a by the rotational driving of the first feeding shaft portion rotation driving portion 13 a and the nip roller driving portion 81. 11a and 11b are respectively fed and conveyed while being held in common by the nip roller 80 via the first support roll 45.

  More specifically, as shown in FIG. 3, in the first feed shaft portion 20a, when the drive shaft 27 connected to the first feed shaft portion rotation drive portion 13a is rotationally driven, the first feed shaft portion 20a is connected to the drive shaft 27. The housing 26 and the pair of pinion shafts 25 of the differential device 22 rotate. The rotation of the pair of pinion shafts 25 is equally transmitted from the pair of pinion gears 24 to the first feeding shaft 21a and the second feeding shaft 21b via the side gears 23a and 23b, and the feeding shafts 21a and 21b are equal. It begins to rotate at an angular velocity (this rotation is called “revolution of the differential”). Thereby, each web 11a and 11b begins to be fed from each feed shaft 21a and 21b. The fed webs 11 a and 11 b are conveyed while being held in common by the drive roller 82 and the rubber roller 83.

  Here, a case is considered where the diameter ra of the roll-shaped original fabric 10a and the diameter rb of the roll-shaped original fabric 10b are different (a roll-shaped original fabric having a relatively small diameter ra (first original fabric)). 10a, and a roll-shaped original fabric (second original fabric) having a relatively large diameter rb is defined as 10b). In this case, if each of the feeding shafts 21a and 21b continues to rotate at a constant speed, the feeding speed Va of the web 11a fed from the first original fabric 10a having a small diameter ra is larger than the diameter rb. It becomes slower than the feeding speed Vb of the web 11b fed from the two original fabrics 10b. Then, the web 11b fed from the second original fabric 10b has a weak tension due to excessive feeding, while the web 11a fed from the first original fabric 10a has a strong tension due to insufficient feeding. . This strong tension acting on the web 11a of the first original fabric 10a pulls the web 11a and tries to rotate the first feeding shaft 21a quickly. Thereby, the torque load difference between the first feed shaft 21a and the second feed shaft 21b increases.

  When a torque load difference of a predetermined value or more occurs between the first feeding shaft 21a and the second feeding shaft 21b, the turning member 72 of the lock element 70 is turned by the torque load difference, and the pad member 71 is moved to the first. 2 The state of contact with the outer peripheral surface of the feeding shaft 21b is eliminated. Accordingly, the lock element 70 does not suppress the rotation of the first feeding shaft 21a and the second feeding shaft 21b with respect to each other. At this time, the abutting member 74 of the locking element 70 is fitted into an unlocking recess 762 or 763 provided on the end surface of the housing 26 of the differential device 22 on the second connection shaft 212b side.

  When the rotational speed of the first feeding shaft 21a is increased as much as possible, there is a speed difference between the rotational speed of the side gear 23a to which the first feeding shaft 21a is connected and the side gear 23b to which the second feeding shaft 21b is connected. As a result, the pair of pinion gears 24 is rotated by the side gear 23a, so that the rotational speed of the side gear 23b to which the second feeding shaft 21b is connected, that is, the rotational speed of the second feeding shaft 21b is slower. (This rotation is called “rotation of the differential”). As a result, excessive tension of the web 11a fed from the first original fabric 10a having a small diameter ra is suppressed, and excessive feeding of the web 11b fed from the second original fabric 10b having a large diameter rb is suppressed. The necessary tension of the web 11b is maintained.

  In the present embodiment, the lock element 70 does not suppress rotation with respect to each other after a torque load difference of a predetermined value or more occurs between the first feed shaft 21a and the second feed shaft 21b. The problem that the brake is always applied between the feed shaft 21a and the second feed shaft 21b and a tension difference is generated between the webs 11a and 11b according to the braking force is prevented. .

Next, a process in which the remaining amount of the webs 11a and 11b in each of the original fabrics 10a and 10b is reduced and the web splicing operation is performed will be described.
First, two new roll-shaped original fabrics 10a ′ and 10b ′ are set on the second feeding shaft portion 20b. More specifically, in the second feed shaft portion 20b, the first original fabric set portion 211a is removed from the first connection portion 212a and the second original fabric set portion 211b is removed from the second connection portion 212b. New roll-shaped first original fabric 10a 'and second original fabric 10b' are set in the first original fabric set portion 211a and the second original fabric set portion 211b, respectively. Then, a first original fabric set portion 211a on which a new roll-shaped first original fabric 10a is set and a second original fabric set portion 211b on which a new roll-shaped second original fabric 10b is set, respectively, It is attached to the connection part 212a and the second connection part 212b.

  Next, in a state where the pad member 71 of the lock element 70 is separated from the outer peripheral surface of the second connecting portion 212b, the web splicing paste P on the first original fabric 10a ′ set on the first original fabric setting portion 211a. And the rotational phase position of the web splicing paste P on the second original fabric 10b ′ set in the second original fabric setting portion 211b are manually adjusted. When the rotational phase position of the paste P of the first original fabric 10a ′ and the rotational phase position of the paste P of the second original fabric 10b ′ coincide with each other, the rotating member 72 of the lock element 70 is manually rotated. The pad member 71 is brought into contact with the outer peripheral surface of the second connection portion 212b. At this time, the contact member 74 of the lock element 70 is fitted into a lock recess 761 provided on the end surface of the housing 26 of the differential device 22 on the second connection shaft 212b side.

  In this way, the lock element 70 suppresses rotation with respect to each other until a torque load difference of a predetermined value or more is generated between the first feeding shaft 21a and the second feeding shaft 21b. Thus, in the state where the two roll-shaped original fabrics 10a ′ and 10b ′ set on the respective feeding shafts 21a and 21b are free (the web is not tensioned), the respective original fabrics 10a ′ and 10b ′. Is prevented from rotating due to disturbance, and the rotational phase positions of the pastes P of the original fabrics 10a ′ and 10b ′ can be maintained so as not to be shifted from each other.

  Next, as shown in FIG. 2, the control unit 90 controls the second feed shaft portion rotation drive unit 13b to start rotation of the feed shaft of the second feed shaft portion 20b. Then, the outermost web speed of the new webs 10a 'and 10b' set on the feed shaft of the second feed shaft portion 20b is gradually increased.

  In the present embodiment, the speed of the outermost peripheral web of the relatively large-diameter second original fabric 10b ′ becomes faster than the conveying speed of the webs 11a and 11b being conveyed, and the first original having a relatively small diameter. The rotational speed (angular speed) of the feed shaft of the second feed shaft portion 20b is adjusted so that the speed of the web on the outermost side of the opposite 10a 'is slower than the transport speed of the webs 11a and 11b being transported.

  Next, the paster nip roller moving mechanism 65 is driven under the control of the control unit 90, and the webs 11a and 11b being conveyed are set by the paster nip roller 62 to the two new feeding shafts 20b. The raw fabrics 10a 'and 10b' are pressed all at once in the width direction.

  Further, according to the control by the control unit 90, the cutting unit moving mechanism 64 is driven according to the rotational phase position of the web splicing paste P, and the webs 11a and 11b being conveyed are moved in the width direction by the cutting unit 61. It is abutted at once and cut. Here, the cutting according to the rotational phase position of the web joining paste P means that the web 11a, 11b being transported is cut and a new original fabric is passed through the paste P at the rear end of the web. This means that the webs 10a 'and 10b' are spliced.

  After the web splicing, the cutting portion 61 is returned to the original position by the cutting portion moving mechanism 64, and the paster nip roller 62 is also returned to the original position by the paster nip roller moving mechanism 65.

  In the present embodiment, immediately before the web splicing, the speed of the outermost peripheral web of the relatively large-diameter second original fabric 10b ′ is higher than the transport speed of the webs 11a and 11b being transported. At the same time, the speed of the outermost peripheral web of the relatively small-diameter first original fabric 10a ′ is slower than the transport speed of the webs 11a and 11b being transported. Therefore, immediately after the web splicing is performed, the web of the second original fabric 10b ′ becomes weak due to excessive feeding, while the web of the first original fabric 10a ′ becomes strong because of insufficient feeding. . This strong tension acting on the web of the first original fabric 10a 'pulls the web of the first original fabric 10a' and tries to rotate the first feed shaft 21a of the second feed shaft portion 20b quickly. Thereby, the torque load difference between the first feed shaft 21a and the second feed shaft 21b increases.

  When a torque load difference of a predetermined value or more occurs between the first feeding shaft 21a and the second feeding shaft 21b, the turning member 72 of the lock element 70 is turned by the torque load difference, and the pad member 71 is The state of contact with the outer peripheral surface of the feeding shaft 21b is eliminated. Accordingly, the lock element 70 does not suppress the rotation of the first feeding shaft 21a and the second feeding shaft 21b with respect to each other. At this time, the abutting member 74 of the locking element 70 is fitted into an unlocking recess 762 or 763 provided on the end surface of the housing 26 of the differential device 22 on the second connection shaft 212b side.

  When the rotational speed of the first feeding shaft 21a is increased as much as possible, there is a speed difference between the rotational speed of the side gear 23b to which the first feeding shaft 21a is connected and the side gear 23b to which the second feeding shaft 21b is connected. As a result, the pair of pinion gears 24 are rotated by the side gear 23b, so that the rotational speed of the side gear 23b to which the second feeding shaft 21b is connected, that is, the rotational speed of the second feeding shaft 21b is slower. The effect occurs. As a result, excessive tension of the web fed from the first original fabric 10a ′ is suppressed, and excessive feeding of the web fed from the second original fabric 10b ′ is suppressed, and the necessary tension of the web is maintained. Will come to be.

  In the present embodiment, the lock element 70 does not suppress rotation with respect to each other after a torque load difference of a predetermined value or more occurs between the first feed shaft 21a and the second feed shaft 21b. The brake is always applied between the feeding shaft 21a and the second feeding shaft 21b, and the problem that a tension difference is generated between the plurality of webs according to the braking force is prevented.

  Thereafter, the position of the first feed shaft portion 20a and the position of the second feed shaft portion 20b are interchanged by the turret mechanism. More specifically, the first feed shaft support arm 12a, the second feed shaft support arm 12b, the first support roll support arm 44, and the second support roll support arm 46 are driven by the rotation motor 43. And the position of the first feeding shaft portion 20a and the position of the second feeding shaft portion 20b are interchanged.

  According to the present embodiment as described above, the difference between the angular velocities of the feed shafts 21a and 21b on which the two roll-shaped original fabrics 10a and 10b are set can be allowed. Even if there is a difference in the diameters of the opposite webs 10a and 10b, the tension of the webs 11a and 11b can be suitably controlled. For this reason, the web conveyance apparatus 1 that can feed the webs 11a and 11b from the two roll-shaped original fabrics 10a and 10b at the same time and can withstand practical use can be realized.

  Further, according to the present embodiment, the lock element 70 suppresses rotation with respect to each other until a torque load difference of a predetermined value or more is generated between the first feed shaft 21a and the second feed shaft 21b. When the two roll-shaped original fabrics 10a ′ and 10b ′ set on the shafts 21a and 21b are free (the web is not tensioned), the original fabrics 10a ′ and 10b ′ are rotated by disturbance. This is suppressed. This effect is remarkably useful in maintaining the bonding positions P of the new original fabrics 10a 'and 10b' so as not to shift at the time of web splicing. Further, since the lock element 70 does not suppress rotation with respect to each other after a torque load difference of a predetermined value or more is generated between the first feeding shaft 21a and the second feeding shaft 21b, the first feeding shaft 21a is not subjected to printing. In addition, it is possible to prevent the problem that the brake is always applied between the second feeding shafts 21b and a tension difference is generated between the plurality of webs 11a and 11b according to the braking force.

  Further, according to the present embodiment, as shown in FIG. 7, when the state where the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is eliminated, the contact member 74 is unlocked. By engaging with 762 or 763, the rotation member 72 is subsequently rotated due to disturbance, and the problem that the pad member 71 comes into contact with the outer peripheral surface of the second feeding shaft 21b again is prevented. it can. Further, when the pad member 71 is kept in contact with the outer peripheral surface of the second feeding shaft 21b, the contact member 74 is fitted into the locking recess 761, so that the rotating member 72 is rotated by disturbance. The problem that the pad member 71 is moved away from the outer peripheral surface of the second feeding shaft 21b can be prevented more reliably.

  In the present embodiment, as shown in FIGS. 7 and 8, the rotating member 72 is fixed with the contact member 74 that contacts the end surface of the housing 26 on the second feeding shaft 21 b side. However, the present invention is not limited to this, as shown in FIGS. 9 and 10, even if a contact member 74 ′ that contacts the rotating member 72 is fixed to the end surface of the housing 26 on the second feed shaft 21 b side. Good. In this case, on the outer circumferential surface of the second feeding shaft 21b on the circular arc path C ′ of the rotating member 72 on which the contact position of the contact member 74 ′ moves while the rotating member 72 is rotating. The state in which the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b and the locking recess 761 ′ in which the contact member 74 ′ is fitted when the state in which the pad member 71 is in contact is maintained. Preferably, unlock recesses 762 ′ and 763 ′ into which the contact member 74 ′ is fitted when they are eliminated are provided. In this case, as shown in FIG. 9, when the state in which the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is resolved, the contact member 74 ′ becomes an unlock recess 762 ′ or 763 ′. By engaging, the problem that the rotation member 72 will rotate by disturbance after that and the pad member 71 will contact | abut to the outer peripheral surface of the 2nd feeding shaft 21b again can be prevented. Further, when the state in which the pad member 71 is in contact with the outer peripheral surface of the second feeding shaft 21b is maintained, the contact member 74 ′ is fitted into the locking recess 761 ′, whereby the rotating member 72 is disturbed. The problem that the pad member 71 is separated from the outer peripheral surface of the second feeding shaft 21b can be prevented more reliably.

DESCRIPTION OF SYMBOLS 1 Web conveyance apparatus 10a, 10a '1st original fabric 10b, 10b' 2nd original fabric 11a, 11b Web 12a 1st feeding part support arm 12b 2nd feeding part support arm 13a 1st feeding part rotation drive part 13b 2nd feed part rotation drive part 19 Turret mechanism 20 Feed part 20a 1st feed shaft part 20b 2nd feed shaft part 21a 1st feed shaft 211a 1st original fabric set part 212a 1st connection part 21b 2nd Feed shaft 211b Second raw fabric set portion 212b Second connection portion 22 Differential gear 23a, 23b Side gear 24 Pinion gear 25 Pinion shaft 26 Housing 27 Drive shaft 28 Support shaft member 29 Radial bearing 30 Infeed portion 40 Printing portion 41 Rotation Shaft 42 Strut 43 Rotating motor 44 First support roll support arm 45 First support roll 46 Second support roll support arm 7 Second support roll 50 Outfeed part 60 Winding part 61 Cutting part 62 Paster nip roller 63 Paster body part 64 Cutting part moving mechanism 65 Pasta nip roller moving mechanism 70 Lock element 71 Pad member 72 Rotating member 73 Rotating shaft 74 74 'Contact member 74a Tip 74b Elastic body 74c Contact member main body 75 Pin-like fixing member 761, 761' Lock recess 762, 762 ', 763, 763' Unlock recess 80 Nip roller 81 Nip roller drive unit 82 Drive Roller 83 Rubber roller 90 Control part C, C 'Circular path P Paste

Claims (7)

A first feed shaft on which a roll-shaped first original fabric is set;
A second feed shaft having a hollow space in which a roll-shaped second raw fabric is set;
A differential disposed on the opposite side of the first feed shaft with respect to the second feed shaft;
A nip roller for nipping and transporting the webs fed in common from the roll-shaped first original fabric and the roll-shaped second original fabric, and
With
The first feeding shaft and the second feeding shaft are arranged coaxially,
Of the two side gears of the differential device, the side gear on the second feed shaft side has a hollow space and is connected to the second feed shaft,
The first feed shaft extends through the hollow space of the second feed shaft and the hollow space of the side gear to which the second feed shaft is connected, and is connected to the other side gear of the differential device. And
A housing of the differential device that accommodates two side gears of the differential device and a pinion gear of the differential device and rotatably supports the pinion gear is connected to a drive shaft, and the housing is connected to the drive shaft. It is supposed to revolve by rotation,
Between the housing of the differential device and the second feed shaft, rotation with respect to each other is suppressed until a torque load difference of a predetermined value or more occurs between the first feed shaft and the second feed shaft. The web conveying device is provided with a lock element that does not suppress rotation with respect to each other after a torque load difference of a predetermined value or more is generated between the first feeding shaft and the second feeding shaft. The web conveying device according to claim 1, wherein a plurality of the locking elements are provided substantially equally in the circumferential direction. The lock element is pivotally provided on an end surface of the housing on the second feeding shaft side, and is fixed to the pivoting member and contacts the outer peripheral surface of the second feeding shaft. A pad member that can be contacted, and the pad is provided on an outer peripheral surface of the second feed shaft until a torque load difference of a predetermined value or more occurs between the first feed shaft and the second feed shaft. After the state where the members are in contact with each other is maintained and rotation with respect to each other is suppressed and a torque load difference of a predetermined value or more is generated between the first feeding shaft and the second feeding shaft, the second The state in which the pad member is in contact with the outer peripheral surface of the feed shaft is eliminated, and rotation with respect to each other is not suppressed.
The web conveyance device according to claim 1 or 2 characterized by things. The web transport device according to claim 3, wherein the pad member is made of rubber or resin. A contact member that contacts the end surface of the housing on the second feed shaft side is fixed to the rotating member,
Of the end surface of the housing on the second feed shaft side, the outer peripheral surface of the second feed shaft is on an arc path on which the contact position of the contact member moves during the rotation of the turning member. The state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft and the lock recess into which the contact member is fitted when the state in which the pad member is in contact with the second feed shaft is maintained. The web conveying device according to claim 4, wherein an unlocking recess into which the abutting member is fitted is provided. A contact member that contacts the rotating member is fixed to an end surface of the housing on the second feeding shaft side,
Of the rotating member, the pad member is in contact with the outer peripheral surface of the second feeding shaft on an arc path on which the contact position of the contact member moves while the rotating member is rotating. The locking member into which the contact member is fitted when the contacted state is maintained, and the contact member is fitted when the state in which the pad member is in contact with the outer peripheral surface of the second feeding shaft is eliminated. The web conveyance device according to claim 4, wherein an unlocking recess is provided. The first feed shaft includes a first original fabric setting portion on which the first original fabric is set, and a first connection portion connected to a side gear of the differential device and extending to the outside of the housing. Have
The second feed shaft includes a second original fabric setting portion on which the second original fabric is set, and a second connection portion connected to a side gear of the differential device and extending to the outside of the housing. Have
The locking element is provided between the housing and the second connection portion of the second feed shaft;
The first original fabric set part is detachable in a plug-in form with respect to the first connection part,
The web conveying device according to any one of claims 1 to 6, wherein the second original fabric set part is also detachable from the second connection part in a plug-in manner.

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