JP6158037B2 - Bending device - Google Patents

Description

  The present invention relates to a bending apparatus for bending a sheet structure having a sheet portion and a pair of extending portions extending from both edges of the sheet portion.

  Conventionally, a sheet structure having a sheet portion and a pair of extending portions extending in the width direction from both edges in the width direction of the sheet portion while conveying the sheet structure in the longitudinal direction of the sheet portion, the leading ends of both extending portions There is known a folding device that bends a sheet structure so that the portion faces the seat portion side.

  This type of bending apparatus includes a conveyance mechanism that conveys the sheet structure in the longitudinal direction while adsorbing the sheet structure, and the leading ends of both extending portions of the sheet structure that is conveyed by the conveyance mechanism are sheet portions. And a folding mechanism that bends the sheet structure so as to face the side (for example, Patent Document 1).

  FIG. 10 shows an apparatus described in Patent Document 1. In FIG.

  The transport mechanism described in Patent Document 1 is a pair of transport belts 111 for transporting the sheet structure ST2 along the transport direction Y4 while adsorbing both edges in the width direction of the sheet portion S2 of the sheet structure ST2. And air on the surface side (sheet side) of the conveyor belt 111 through a plurality of rollers 112A to 112D for passing each conveyor belt 111 along a predetermined path and suction holes 111C formed in each conveyor belt 111. And a pair of suction portions 113 for sucking.

  The folding mechanism includes a pair of folding belts 121 for folding the extending portions T2 on the sheet portion S2 side as indicated by an arrow Y5, and a path set in advance for folding the extending portions T2. A plurality of rollers 122 </ b> A to 122 </ b> E for passing the folding belt 121 are provided.

  Here, in the case of adjusting the fold line (interval between fold lines) of the two extending portions T2 in accordance with the change in the width dimension of the sheet portion S2, in the apparatus described in Patent Document 1, the two conveyor belts 111 (both The distance between the rollers 112A to 112D) is changed.

JP2013-13465A (particularly paragraph 0059)

  However, since both the conveyance belts 111 convey one sheet component, the driving of both the conveyance belts 111 needs to be synchronized.

  Therefore, as in the apparatus described in Patent Document 1, when the distance between the two conveyor belts 111 (both rollers 112A to 112D) is changed, the driving speed of the two conveyor belts 111 is adjusted each time. There is a problem that it is necessary and the work is complicated.

  The objective of this invention is providing the bending apparatus which can perform the adjustment operation | work of a fold line easily.

  In order to solve the above problems, the present invention conveys a sheet structure having a sheet portion and an extending portion extending outward in the width direction from an edge in the width direction of the sheet portion in the longitudinal direction of the sheet portion. A folding device for folding the sheet structure so that the leading end of the extension portion faces the sheet portion side, and the sheet structure is placed in a preset conveyance path in a state where the sheet portion is adsorbed. A conveyance mechanism that conveys the sheet structure, and a folding mechanism that bends the sheet structure so that an extending portion of the sheet structure that is conveyed by the conveyance mechanism faces the sheet portion side. A conveyor belt having a plurality of suction holes provided in a range including a plurality of fold lines set in advance as fold lines of the sheet structure, and the conveyor belt is hung along an annular path including the conveyor path. A plurality of conveying pulleys for passing, a suction portion provided along an edge in the width direction of the conveying belt in the annular path and capable of sucking air through the suction hole, and the conveying by the suction portion The suction part with respect to the transport belt such that an outer end of the suction range formed on the belt in the width direction and close to the edge of the transport belt matches one of the fold lines. And a suction adjustment mechanism capable of adjusting the position of the bending device.

  According to the present invention, the sheet structure is conveyed by the conveyance belt, and the fold line (suction range) set on the conveyance belt is adjusted by the movement of the suction unit without moving the conveyance belt in the width direction. be able to.

  Therefore, unlike conventional devices that require position adjustment and speed adjustment of the two conveyor belts, it is not necessary to adjust the position of the conveyor belt when changing the folding line, and the accompanying speed adjustment is also unnecessary. Become.

  Therefore, according to the present invention, it is possible to easily change the folding line.

  In the present invention, the fact that the outer end of the suction range “matches” the folding line is not only the case where the position of the outer end of the suction range matches the position of the folding line, but also the sheet structure. This includes the case where the position of the outer end of the suction range and the position of the fold line are close to each other within a range where the fold line can be folded along the fold line.

  In the bending apparatus, the sheet structure has the extension portions at both edges in the width direction of the sheet portion, and the suction portion is preset in each of the extension portions. It can be set as the structure each provided along the fold line.

  In this case, the suction adjustment mechanism may be capable of simultaneously adjusting the positions of both suction parts, but it is preferable that the positions of the suction parts can be individually adjusted.

  According to the above aspect, not only the fold line on both sides can be changed at the same time, but only one fold line can be changed, so that it is possible to flexibly cope with various specification changes of the sheet structure.

  As the conveyor belt, two conveyor belts each having a suction hole may be provided, and further, three or more conveyor belts may be provided by adding a conveyor belt having no suction hole to these conveyor belts. One conveyance belt can be provided.

  In other words, the suction holes can be formed in both edges in the width direction of the transport belt in a range including a plurality of fold lines preset in each of the extending portions. .

  According to the said aspect, both extension parts can be bent, conveying a sheet structure to a longitudinal direction with the stable attitude | position.

  In the folding apparatus, the folding mechanism includes a folding belt for folding the sheet structure, and a folding belt that is inclined with respect to the conveyance path to bend the sheet structure and is set around the folding line. A plurality of folding pulleys for passing the folding belt along an annular path including a path, and at least one of the plurality of folding pulleys so as to change a relative position of the folding belt with respect to the conveying belt in the folding path. It is preferable to provide a folding adjustment mechanism that adjusts one position.

  According to the above aspect, the sheet structure can be folded at a plurality of fold lines by adjusting the relative position of the fold belt with respect to the conveyor belt in the folding mechanism as the folding line is changed by the conveying mechanism.

  Here, as the relative position of the folding belt to the conveyance belt is changed, the inclination angle of the folding path with respect to the conveyance path may change. In this case, the speed component in the direction along the conveyance path in the moving speed of the folding belt changes before and after the change, and the folding belt may not be able to follow the conveyance belt.

  Therefore, it is preferable that the bending apparatus further includes a transmission means for changing a moving speed of the folding belt along the folding path.

  In this case, the moving speed of the folding belt can be changed so that the folding belt follows the conveyance belt, so that even if the inclination angle of the folding path with respect to the conveyance path changes, the sheet structure can be more reliably Can be bent.

  Here, it is possible to employ a power source (servo motor or the like) capable of adjusting the rotation speed as the speed change means. However, the speed change means transmits power for moving the folding belt to the plurality of folding pulleys. It is preferable that a power source to be supplied to the power source and a speed change mechanism capable of changing a speed ratio between the power source and the plurality of folding pulleys.

  According to the above aspect, since the shifting of the folding belt can be mechanically realized, the cost can be reduced as compared with the case where a power source having a shifting function is employed.

  In particular, if the power source that supplies power for moving the transport belt to the plurality of transport pulleys is adopted as the power source, the power source can be used in both the transport mechanism and the folding mechanism. In addition, the cost can be reduced.

  According to the present invention, it is possible to easily adjust the folding line.

It is process drawing for demonstrating the bending operation performed by the bending apparatus which concerns on this invention. 1 is a schematic front view showing an overall configuration of a bending apparatus according to the present invention. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. FIG. 3 is a V arrow diagram of FIG. 2. FIG. 3 is a VI arrow diagram of FIG. 2. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is sectional drawing which shows operation | movement of the bending apparatus of FIG. 2, (a) is the state before the extension part bend | folded, (b) is the state in which the extension part was bent 90 degrees, (c) is the extension part. A state of being bent toward the sheet portion side, and (d) showing a state where the bending of the extending portion has been completed. It is a perspective view which shows the conventional bending apparatus schematically.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The following embodiments are examples embodying the present invention, and are not of a nature that limits the technical scope of the present invention.

  First, the bending operation performed by the bending apparatus according to the present invention will be described with reference to FIG.

  The sheet structure ST1 to be bent has a sheet portion S1 and extending portions T1 extending in the width direction from both edges in the width direction (vertical direction in FIG. 1) of the sheet portion S1.

  In the bending apparatus to be described later, both extension portions T1 face the sheet portion S1 side while conveying the sheet structure ST1 in the longitudinal direction of the sheet portion S1 (direction indicated by arrow Y1 in FIG. 1; hereinafter referred to as the conveyance direction Y1). Thus, the sheet structure ST1 is bent as indicated by the arrow Y2.

  The said sheet structure ST1 can be used for manufacture of the disposable diaper D1, for example.

  In this case, for example, a non-woven sheet is employed as the sheet portion S1, and a tape (for example, a mechanical fastener) that is attached to the sheet portion S1 as the extending portion T1 and can be locked to the non-woven sheet is employed.

  Notches L for legs are formed at both edges in the width direction of the sheet part S1 before or after the extension part T1 is attached to the sheet part S1.

  And disposable diaper D1 is manufactured by cut | disconnecting sheet | seat part S1 along the cutting line along the width direction between the notch L mutually adjacent in the longitudinal direction of sheet | seat part S1.

  The disposable diaper D1 is formed by connecting the overlapped sheet portions S1 with the extending portion T1 in a state where the sheet portions S1 sandwiching the notch L overlap each other as indicated by an arrow Y3. It can be worn by locking the extending portion T1 to the sheet portion S1. In addition, the disposable diaper D1 may have the absorber provided between the notches L.

  Hereinafter, with reference to FIG.1 and FIG.2, the bending apparatus 1 which concerns on embodiment of this invention is demonstrated.

  The folding device 1 includes a transport mechanism 2 that transports the sheet structure ST1 along a preset transport path R1 in a state where the sheet portion S1 is adsorbed, and a bifurcation of the sheet structure ST1 that is transported by the transport mechanism 2. A folding mechanism 3 that bends the sheet structure ST1 so that the protruding portion T1 faces the sheet portion S1 side, and a support mechanism 4 that supports the transport mechanism 2 and the folding mechanism 3 are provided.

  In the following description, the direction along the transport path R1 is defined as the X direction, the direction along the width direction of the sheet portion S1 in the transport path R1 is defined as the Y direction, and the direction orthogonal to the XY plane is described as the Z direction. . The support portion 4 is a plate-like support member provided along the XZ direction on one side in the Y direction of the bending apparatus 1 (the back side in FIG. 1).

  The transport mechanism 2 includes a single transport belt 5 having a plurality of suction holes 5a (see FIG. 3), a pair of transport pulleys 6 for passing the transport belt 5 along an annular path including the transport path R1, and A motor (drive source) 7 that supplies power for moving the transport belt 5 to one transport pulley 6 and a suction mechanism 8 capable of sucking air through the suction hole 5a are provided.

  3 and 5, the plurality of suction holes 5a are provided in a range including two fold lines B1 and B2 set in advance as fold lines of the sheet structure ST1. Here, the fold line B1 is set for the sheet structure ST1 in which the width dimension of the sheet portion S1 is relatively large, and the fold line B2 is a sheet structure in which the width dimension of the sheet portion S1 is relatively small. This is set for the object ST1.

  Among the plurality of suction holes 5 a, those belonging to the group G <b> 2 are provided in a predetermined range from both folding lines B <b> 2 toward the center side in the width direction of the conveyor belt 5. On the other hand, the suction holes 5a belonging to the group G1 are provided in a range from the fold line B1 to the fold line B2.

  Referring to FIGS. 2 to 4, the suction mechanism 8 includes a pair of portions provided along both edges in the Y direction (width direction) of the conveyor belt 5 in the annular path in which the conveyor belt 5 is routed. A suction part 18, a suction support part 19 that supports both suction parts 18 so as to be movable in the Y direction, and a pair of adjustment pins 20 for adjusting the support position of each suction part 18 relative to the suction support part 19. ing.

  Each suction unit 18 includes a suction box 21 having a chamber therein, a suction port 22 for connecting a suction source (not shown) for sucking air in the chamber of the suction box 21 to the suction box 21, and a suction box 21 as Y A pair of bosses 23 penetrating in the direction and a fixing nut 24 fixed to one boss 23 are provided.

  The suction box 21 is configured in a box shape by combining a plurality of plate materials. A plurality of suction holes 21 b for sucking air through suction holes 5 a of the transport belt 5 are formed in the opposing wall 21 a facing the transport belt 5 of the suction box 21.

  The suction holes 21b are elongated holes that extend in a direction inclined with respect to the Y direction, and are arranged in a row in the X direction in a state of being arranged in parallel to each other. The length of the suction hole 21b in the Y direction is set to a length that can overlap the suction hole 5a belonging to the group G1 or the suction hole 5a belonging to the group G2 of the transport belt 5.

  The suction support portion 19 includes a box support portion 19 a that supports both suction boxes 21, and a pin support portion 19 b that is provided in the middle of the box support portion 19 a and supports both adjustment pins 20.

  The box support portion 19 a extends in the Y direction from the support portion 4 and penetrates both suction boxes 21. Specifically, a through hole 21c that penetrates the suction box 21 in the Y direction is formed at a substantially central position in the X direction of both suction boxes 21, and the box support portion 19a is airtight between the suction box 21 and the suction box 21. Both suction boxes 21 are penetrated through the through holes 21c in a state where the properties are maintained. Each suction box 21 is supported by the box support 19a so as to be movable in the Y direction with respect to the box support 19a.

  Both adjustment pins 20 include a pin body 20a, a male screw portion 20b that is concentric with the pin body 20a and has a larger diameter than the pin body 20a, and a positioning ring 20c fixed to the pin body 20a. Yes.

  The pin main body 20a of both the adjustment pins 20 is inserted through an insertion hole 19c formed in the pin support portion 19b. In this state, both adjustment pins 20 are attached to the pin support portion 19b in a state where movement in the axial direction (Y direction) is restricted by the pin support portion 19b and the positioning ring 20c.

  Specifically, the insertion hole 19c of the pin support portion 19b has a diameter through which the pin body 20a can be inserted and the male screw portion 20b cannot be inserted. And the pin support part 19b is pinched | interposed between the male screw part 20b and the positioning ring 20c fixed to the pin main body 20a, and the movement of the axial direction of the adjustment pin 20 is controlled. The diameter of the insertion hole 19c of the pin support portion 19b is set to a diameter that allows the pin body 20a to rotate.

  The adjustment pin 20 shown in the upper part of FIG. 4 passes through the boss 23 of the right suction part 18 and is screwed to the fixing nut 24 of the left suction part 18 by the male screw part 20b at the tip. Therefore, the left suction part 18 can be moved in the Y direction according to the rotation of the adjustment pin 20.

  On the other hand, the adjustment pin 20 shown in the lower part of FIG. 4 is screwed into the fixing nut 24 of the suction part 18 on the right side. Therefore, the suction unit 18 on the right side can be moved in the Y direction according to the rotation of the adjustment pin 20.

  Specifically, as shown in FIG. 3 and FIG. 5, outer end portions close to both edges of the conveyance belt 5 in the Y direction of a pair of suction ranges formed on the conveyance belt 5 by both suction portions 18, respectively. The positions of the suction portions 18 with respect to the transport belt 5 can be adjusted between a position where L1 matches the fold line B1 and a position where L1 matches the fold line B2.

  That is, the suction adjustment mechanism according to the present embodiment includes the fixed nut 24, the suction support portion 19, and the pair of adjustment pins 20.

  Hereinafter, the folding mechanism 3 will be described with reference to FIGS. 2 and 5.

  The folding mechanism 3 includes a pair of folding belts 9 for folding the sheet structure ST1 and a folding path that is inclined with respect to the conveyance path R1 to fold the sheet structure ST1 and is set around folding lines B1 and B2. A first folding adjustment mechanism 14 that changes the distance between the first folding pulley 10 and the first to fourth folding pulleys 10 to 13 for bridging both folding belts 9 along the annular path including the path R2. The second folding adjustment mechanism 15 that changes the distance between the second folding pulleys 11, the fourth folding adjustment mechanism 16 that changes the distance between the fourth folding pulleys 13, and the movement of both folding belts 9. And a speed change mechanism 17 for changing the speed.

  The folding belt 9 is driven to circulate so as to pass through the first folding pulley 10, the second folding pulley 11, the third folding pulley 12, and the fourth folding pulley 13 in this order.

  Here, the folding path R <b> 2 is set between the first folding pulley 10 and the second folding pulley 11. Both first folding pulleys 10 hold the folding belt 9 at positions corresponding to both edges in the width direction (Y direction) of the conveyor belt 5. Both the second folding pulleys 11 hold the folding belt 9 at a position closer to the center in the width direction of the conveying belt 5 than both the first folding pulleys 10. Thereby, a folding path R2 is set in which the folding belts 9 are displaced so as to be close to each other in the Y direction toward the transport direction Y1.

  The folding path R2 is set so that the folding belt 9 is reversed. Specifically, the first folding pulley 10 holds the folding belt 9 in the posture shown in FIG. 9 (a), while the second folding pulley 11 is the folding belt in the posture shown in FIG. 9 (d). 9 is held.

  Further, the folding path R <b> 2 is set such that the folding belt 9 is displaced in the Z direction from a position in contact with the conveying belt 5 toward a position away from the conveying belt 5. Specifically, as shown in FIG. 9A, the first folding pulley 10 holds the folding belt 9 so that the folding belt 9 comes into contact with the extending portion T1 from the conveying belt 5 side. . On the other hand, as shown in FIG. 9D, the second folding pulley 11 holds the folding belt 9 at a position separated from the conveying belt 5 in the Z direction.

  By moving both folding belts 9 along the folding path R2 set as described above, the sheet structure ST1 can be folded as follows.

  First, from the state shown in FIG. 9A, the sheet structure along the fold line (exemplified by the fold line B2) defined by the position of the suction hole 21b as shown in FIG. 9B. ST1 can be folded.

  Further, as shown in FIG. 9 (c), the extending portion T1 is guided onto the sheet portion S1 so as to face the sheet portion S1, and finally, as shown in FIG. 9 (d). The extending part T1 can be brought into close contact with the surface of the sheet part S1.

  In addition, when a nonwoven fabric sheet is adopted as the sheet part S1 and a mechanical fastener is adopted as the extension part T1, the extension part T1 can be locked on the sheet part S1 in the state of FIG. 9 (d). it can.

  Here, when the folding lines B1 and B2 are changed as described above, the folding path R2 may need to be adjusted. In this case, the distance between the first folding pulleys 10 and / or the distance between the second folding pulleys 11 is changed.

  Hereinafter, with reference to FIG.6 and FIG.7, the 1st folding adjustment mechanism 14 for changing the distance between the 1st folding pulleys 10 is demonstrated.

  The first fold adjusting mechanism 14 is attached to the rail 26 so as to be slidable in the Y direction, a pulley support 25 supporting both the first fold pulleys 10, a rail 26 fixed to the pulley support 25. A pair of sliders 27, a pair of holding members 28 fixed to both sliders 27 and holding the first folding pulley 10, and a pair of adjustment pins for adjusting the position of each holding member 28 in the Y direction. 29.

  The pulley support portion 25 includes a rail support portion 25a extending in the Y direction from the support portion 4, and a pair of pin support portions 25b extending in the Z direction from positions separated in the Y direction in the rail support portion 25a.

  The rail 26 is fixed along the Y direction between the pin support portions 25b of the rail support portion 25a.

  Both holding members 28 include a small-diameter insertion hole 28a, a large-diameter insertion hole 28b having an inner diameter larger than that of the small-diameter insertion hole 28a, and a fixing nut 28c fixed in the large-diameter insertion hole 28b.

  Both adjustment pins 29 include a pin main body 29a, a male screw portion 29b which is provided concentrically with the pin main body 29a and has a larger diameter than the pin main body 29a, and a positioning ring 29c fixed to the pin main body 29a. Yes.

  Both adjustment pins 29 are supported by both pin support portions 25b in a state of penetrating both pin support portions 25b and both holding members 28.

  Here, the two adjustment pins 29 are attached to the one pin support portion 25b in a state where movement in the axial direction (Y direction) is restricted by the one pin support portion 25b and the positioning ring 29c.

  Specifically, the pin support portion 25b includes an insertion hole 25c having a constant diameter dimension and a retaining hole 25d having a diameter dimension that changes midway. The diameter dimension of the insertion hole 25c is set so that the pin body 29a of the adjustment pin 29 can be inserted. The retaining hole 25d has a small-diameter portion having a diameter that allows the pin main body 29a of the adjustment pin 29 to be inserted and the male screw portion 29b cannot be inserted, and a large-diameter portion having a diameter that allows the male screw portion 29b to be inserted. doing.

  Then, the small-diameter portion of the retaining hole 25d is sandwiched between the male screw portion 29b inserted into the large-diameter portion of the retaining hole 25d and the positioning ring 29c fixed to the pin body 29a. Directional movement is restricted. In addition, the diameter of the small diameter part of the insertion hole 25c and the retaining hole 25d is a diameter which can rotate the pin main body 29a.

  The adjustment pin 29 shown in FIG. 7 is screwed into the fixing nut 28c of the left holding member 28 and is inserted through the small diameter insertion hole 28a of the right holding member 28. On the other hand, the adjustment pin 29 shown in the lower part of FIG. 7 is inserted into the small-diameter insertion hole 28a of the left holding member 28 and screwed into the fixing nut 28c of the right holding member 28.

  Therefore, both the holding members 28 and the first folding pulley 10 held by the holding members 28 can be moved in the Y direction in accordance with the rotation of the adjusting pins 29.

  The second fold adjustment mechanism 15 and the fourth fold adjustment mechanism 16 are the same as the first fold adjustment mechanism 14 that converts the rotational movement of the adjustment pin into a linear movement in the Y direction, and thus description thereof is omitted.

  By changing the distance between the first folding pulleys 10 and / or the second folding pulleys 11 by the first folding adjustment mechanism 14 and / or the second folding adjustment mechanism 15 described above, the folding path R2 relative to the transport path R1 is changed. The inclination angle and the interval between the folding belts 9 can be adjusted.

  Thereby, when the folding lines B1 and B2 are changed, the folding path R2 suitable for the changed folding line can be set.

  Here, when the inclination angle of the folding path R2 with respect to the conveying path R1 is changed, the component in the X direction of the speed of the folding belt 9 in the folding path R2 is set to be equal to that of the conveying belt 5 in order to run the conveying belt 5 and the folding belt 9 together. It is necessary to adjust to the moving speed.

  Hereinafter, the speed change mechanism 17 for changing the moving speed of the double folding belt 9 will be described with reference to FIG.

  The speed change mechanism 17 includes a rotation shaft 30 to which both third folding pulleys 12 are fixed, a transmission pulley 31 fixed to the rotation shaft 30, and a transmission pulley arranged to face the transmission pulley 31 in the X direction. 32, a speed change belt 33 spanned between both speed change pulleys 31, 32, a distance adjusting member 34 capable of adjusting the distance between the belt holding portions of the speed change pulley 32, and a rotating shaft 32 a of the speed change pulley 32. A timing pulley 35 that is fixed, and a timing belt 36 that is stretched between the timing pulley 35 and a timing pulley 7b that is fixed to the rotating shaft 7a of the motor 7 are provided. The rotating shafts 7a, 30 and 32a are supported so as to be rotatable with respect to the support portion 4, respectively.

  The power of the motor 7 is transmitted to the speed change pulley 32 via the timing belt 36 and to the speed change pulley 31 via the speed change belt 33. Thereby, the third folding pulley 12 is driven to rotate according to the power of the motor 7.

  The interval adjusting member 34 can adjust the interval between a pair of flange portions that hold the speed change pulley 32 by a screw mechanism (not shown) (see the portion indicated by a two-dot chain line in FIG. 8).

  Here, when the interval between the flange portions is narrowed, the holding position of the transmission belt 33 is shifted to the outside in the radial direction of the transmission pulley 32, so that the speed of the transmission pulley 31 is increased. On the other hand, if the gap between the flange portions is increased, the holding position of the transmission belt 33 is shifted to the inside in the radial direction of the transmission pulley 32, so that the speed of the transmission pulley 31 decreases.

  The transport pulley 6 described above is attached to the tip of the rotating shaft 7a of the motor 7. That is, the motor 7 is also used as a power source for the transport mechanism 2 and the folding mechanism 3.

  As described above, as shown in FIGS. 3 and 5, the transport mechanism 2 has the transport belt 5 in the Y direction (width direction) of the pair of suction ranges formed on the transport belt 5 by both suction portions 18. A suction adjustment mechanism (fixed) capable of adjusting the positions of the suction portions 18 with respect to the conveyor belt 5 so that the outer end L1 (the end L1 of the suction hole 21b) close to both edge portions of the two is aligned with the fold lines B1 and B2. A nut 24, a suction support 19 and an adjustment pin 20) are provided.

  As a result, the sheet structure ST1 is transported by the single transport belt 5, and the pair of suction portions B1 and B2 set on the transport belt 5 are moved without moving the transport belt 5 in the width direction. It can be adjusted by 18 movements.

  Therefore, unlike the conventional apparatus that requires position adjustment and speed adjustment of the two conveyance belts, it is not necessary to adjust the position of the conveyance belt 5 when changing the folding lines B1 and B2, and the speed associated therewith. Adjustment is also unnecessary.

  Therefore, the work of changing the folding lines B1 and B2 can be easily performed.

  Moreover, according to the said embodiment, there exist the following effects.

  Since the position of each suction part 18 can be adjusted individually, not only the fold lines B1 and B2 on both sides can be changed simultaneously, but only one fold line can be changed. Thereby, it can respond flexibly to various specification changes of the sheet structure ST1.

  Since the first fold adjusting mechanism 14 and the second fold adjusting mechanism 15 are provided, the distance between the two folding belts 9 in the folding mechanism 3 with the change of the folding lines B1 and B2 by the transport mechanism 2, etc. By adjusting the relative position of each folding belt 9 with respect to the conveying belt 5, the sheet structure ST1 can be folded at a plurality of folding lines B1 and B2.

  Here, as the relative position of the folding belt 9 with respect to the conveyance belt 5 is changed, the inclination angle of the folding path R2 with respect to the conveyance path R1 may change. In this case, the speed component in the direction along the transport path R <b> 1 of the moving speed of the folding belt 9 changes before and after the change, and the folding belt 9 may not be able to follow the transport belt 5.

  Here, since the speed change mechanism 17 is provided in the embodiment, the moving speed of the folding belt 9 can be changed so that the folding belt 9 follows the conveying belt 5. Therefore, even when the inclination angle of the folding path R2 with respect to the transport path R1 changes, the sheet structure ST1 can be more reliably folded.

  Further, since the speed change of the folding belt 9 can be mechanically realized by the speed change mechanism 17, the cost can be reduced as compared with the case where a power source having a speed change function is employed.

  In particular, since a motor 7 that supplies power for moving the transport belt 5 to the plurality of transport pulleys 6 is employed as a power source, the transport mechanism 2 and the folding mechanism 3 can also be used as the motor 7. Therefore, cost can be more effectively reduced.

B1, B2 Folding line L1 End of suction hole (outer end of the suction range in the width direction)
R1 Conveying path R2 Folding path S1 Sheet part ST1 Sheet structure T1 Extension part Y1 Conveying direction 1 Bending device 2 Conveying mechanism 3 Folding mechanism 5 Conveying belt 5a Suction hole 6 Conveying pulley 7 Motor (drive source)
DESCRIPTION OF SYMBOLS 9 Folding belt 10-13 Folding pulley 14 1st folding adjustment mechanism 15 2nd folding adjustment mechanism 17 Transmission mechanism 18 Suction part 19 Suction support part (an example of a suction adjustment mechanism)
20 Adjustment pin (example of suction adjustment mechanism)
21b Suction hole 24 Fixing nut (an example of a suction adjustment mechanism)

Claims (8)

While the sheet structure having a sheet portion and an extending portion extending outward in the width direction from an edge portion in the width direction of the sheet portion is conveyed in the longitudinal direction of the sheet portion, the leading end portion of the extending portion is on the sheet portion side A folding device for folding the sheet structure to face
A transport mechanism for transporting the sheet structure along a transport path set in advance in a state where the sheet portion is adsorbed;
A folding mechanism that bends the sheet structure so that an extension part of the sheet structure being conveyed by the conveyance mechanism faces the sheet part side;
The transport mechanism includes a transport belt having a plurality of suction holes provided in a range including a plurality of fold lines set in advance as fold lines of the sheet structure, and the transport along an annular path including the transport path. A plurality of transport pulleys for passing the belt, a suction section provided along an edge in the width direction of the transport belt in the annular path and capable of sucking air through the suction holes; and the suction section The suction range formed on the conveyor belt by the outer edge of the conveyor belt in the width direction near the edge of the conveyor belt matches one of the fold lines. A bending apparatus comprising: a suction adjustment mechanism capable of adjusting a position of the suction part.   The sheet structure has the extending portions at both edges in the width direction of the sheet portion, and the suction portion is along a fold line set in advance for each of the extending portions. The bending apparatus according to claim 1, wherein each of the bending apparatuses is provided.   The bending apparatus according to claim 2, wherein the suction adjustment mechanism is capable of individually adjusting a position of each suction unit.   4. The suction hole is formed in each of the edges in the width direction of the conveyor belt in a range including a plurality of fold lines set in advance in each of the extending portions. 5. Bending device.   The folding mechanism includes a folding belt for folding the sheet structure, and an annular path that includes a folding path that is inclined with respect to the conveyance path and that is preset around the folding line to bend the sheet structure. And adjusting a position of at least one of the plurality of folding pulleys so as to change a relative position of the folding belt with respect to the conveying belt in the folding path. The folding apparatus of any one of Claims 1-4 provided with the folding adjustment mechanism to perform.   The bending apparatus according to claim 5, further comprising transmission means for changing a moving speed of the folding belt along the folding path.   The transmission means includes a power source that supplies power for moving the folding belt to the plurality of folding pulleys, and a transmission mechanism that can change a speed ratio between the power source and the plurality of folding pulleys. The bending apparatus according to claim 6.   The bending device according to claim 7, wherein the power source supplies power for moving the transport belt to the plurality of transport pulleys.

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