JP4345006B2 - Blank sheet folding conveyor - Google Patents

Description

  The present invention relates to a blank sheet folding and conveying apparatus for conveying a folded blank sheet taken out from a sheet magazine in a wrap-around type caser.

  For example, in the blank sheet take-out device disclosed in Patent Document 1, a blank sheet folded into a U-shape that opens upward when taken out from a magazine is pushed out toward a conveyor by an extrusion mechanism. The The transport conveyor includes a plurality of support members that are separated in the transport direction, and the upward U-shaped blank sheet that is extruded by the extrusion mechanism is a support member that is preceded by a wall portion (front wall portion) on the front side in the extrusion direction. And the subsequent support member coming later comes into contact with the rear wall portion (rear wall portion), and is conveyed while being held in an upward U-shape.

The front wall portion of the blank sheet that contacts the preceding support member of the conveyance conveyor is bent by contacting a fixed guide member provided in the sheet take-out path from the magazine. Since the front wall portion is separated from the guide member and released from being held, the front wall portion is once opened with respect to the seat bottom wall, and then the subsequent support member is moved from the rear and the preceding support member is moved. , The front wall portion is again held in a state of being bent at a substantially right angle.
Japanese Utility Model Publication 2-4883

  However, when performing properties such as the thickness and material of the blank sheet, or high-speed processing, the front wall portion once released by the conventional apparatus is not bent again at a substantially right angle, and the conveyor There is a possibility that stable conveyance cannot be performed because the support members are not held well.

  That is, the present invention has been proposed in order to suitably solve the above-mentioned problems inherent in the conventional technology described above, and is a blank that has been taken out of a sheet magazine and bent. It aims at providing the bending conveyance apparatus of the blank sheet which can convey a sheet | seat stably.

In order to overcome the above-mentioned problems and achieve the desired purpose suitably, the blank sheet folding and conveying apparatus according to the present invention comprises:
From a sheet magazine in which a plurality of blank sheets are accumulated, a sheet transporting means for sucking and taking out the blank sheets and transporting them downward,
A conveyor that is provided below the sheet magazine and that holds and conveys the lower bent portion of the folded blank sheet delivered from the sheet transfer means by a holding means;
The front bent portion of the blank sheet that is positioned so as to stand up from the transport conveyor in the transport direction front side of the transport conveyor with respect to the lower bent portion of the blank sheet held by the holding means. A bending member that supports the front side in the transport direction;
As the transport conveyor holds and transports the folded blank sheet, the front folding section is at a predetermined angle with respect to the lower folding section. It is characterized by comprising driving means for changing the support position of the bending member to the downstream side.

  According to the blank sheet folding and conveying apparatus according to claim 1 of the present invention, the folded blank sheet is supported by the bending member while the lower bent portion is held by the conveyor and the front bent portion is supported by the bending member. Since it is conveyed, the conveyance of the folded blank sheet is stabilized. Moreover, since the angle of the front bending part with respect to a downward bending part is made into a predetermined angle in this state, a bending state is kept favorable. That is, even if it is a blank sheet that easily returns to its original state when folded, it can be prevented from returning to its original state due to properties such as thickness and material, so that it can be conveyed well while maintaining its folded state. Therefore, it is possible to cope with a high-speed conveyance of the folded blank sheet.

  According to the folding and conveying apparatus of the second aspect, since the support position of the bending member with respect to the front bending portion is changed to the downstream side in synchronization with the speed of the conveying conveyor, the blank sheet can be bent well. . Further, according to the folding and conveying apparatus according to the third aspect, since the support position of the bending member is changed so as to release the support for the front bent portion of the blank sheet, the folding is performed only at the portion that needs to be supported with respect to the sheet. The position of the bending member may be changed, and the apparatus can be made compact.

  According to the bending conveying apparatus according to the fourth aspect, since the bending member is merely provided on the endless cord body and moved, the configuration is simplified and the bending member can be moved at a high speed. In addition, since a plurality of bending members are provided on the endless cord, it is possible to cope with an increase in the speed of conveying the blank sheet. Further, according to the folding conveying apparatus according to claim 5, since the variable speed motor is adopted as the driving source of the driving means, the timing at which the bending member starts supporting the front bent portion can be changed, and the blank sheet. Get good folding. And it can respond easily when the size of a blank sheet is changed.

  According to the folding and conveying apparatus according to the sixth aspect, the folding member can be used as a means for folding the blank sheet taken out by the sheet conveying means, so that the configuration can be simplified. According to the folding conveying device of claim 7, when the blank sheet comes into contact with the bending member, the lower folding portion side in the vicinity of the folding line of the blank sheet is supported from the inner surface during box making. Since the folding member supports the sheet, the sheet can be folded well.

  According to the folding conveying apparatus of the eighth aspect, the sheet conveying means is delivered to the conveying conveyor by bringing the folding member or other folding means into contact with the surface opposite to the surface that attracts the blank sheet. Since the blank sheet is in a folded state, in this case, the blank sheet is folded well without being peeled off from the sheet transfer means. Moreover, according to the bending conveyance apparatus which concerns on Claim 9, the positioning at the time of delivery of the blank sheet from a conveyance conveyor to a transfer conveyor becomes favorable.

  Next, a preferred embodiment of the blank sheet folding and conveying apparatus according to the present invention will be described below with reference to the accompanying drawings. For convenience of explanation, “left and right” refers to a direction that intersects the feeding direction of the blank sheet in the sheet magazine.

  As shown in FIG. 1, a wrap-around type caser 10 (hereinafter referred to as a caser) employing a blank sheet folding and conveying apparatus according to an embodiment includes a sheet magazine 12 that stacks a plurality of blank sheets 11 in an upright posture. Is provided. The sheet magazine 12 is provided with a sheet feeding means 14 provided with two conveying shafts 13 and 13 (only one of which is shown) on which the blank sheet 11 is placed, spaced in parallel in the left-right direction. The shafts 13 and 13 are continuously rotated in one direction by corresponding drive motors 15 and 15 (only one is shown). Each conveyance shaft 13 is formed with a spiral groove in a direction for propelling the blank sheet 11 placed by the rotation toward the take-out port of the sheet magazine 12. The sheet group is sent to the downstream side, and the leading blank sheet 11 is taken out at the outlet.

  The blank sheet 11 is accumulated in the sheet magazine 12 in a posture in which an inner surface (hereinafter referred to as an inner surface at the time of box making) faces toward the downstream side in the sheet feeding direction when the blank sheet 11 is boxed. In 19, the inner side surface at the time of box making is sucked and held and taken out from the take-out port. Further, as shown in FIG. 4, the blank sheet 11 is positioned on the front side (downstream side) in the sheet conveying direction of the conveying conveyor 20 described later, with the bottom wall portion 11a serving as the bottom wall when the box is formed. The front bent portion 11b and the rear bent portion 11c located on the rear side are connected to each other via bending lines 11d and 11d extending in the left-right direction (width direction), respectively. The folded portions 11b are integrated so as to be positioned on the upper side. Note that the blank sheet 11 is folded in two when delivered from the sheet transfer means 19 to be described later to the transport conveyor 20, and the front folded portion 11b is folded upward in this state. The lower bent portion 11e is composed of the bottom wall portion 11a, the rear bent portion 11c, and the flaps connected to the respective portions 11a and 11c. Further, when the blank sheet 11 is boxed, the front bent portion 11b includes a side wall portion (front side wall portion) that becomes one side wall, a top wall portion that becomes a top wall, and each flap that is connected to each wall portion. Each wall part is comprised so that it may connect in series in order of the side wall part and the top wall part from the said bottom wall part 11a. And the back bending part 11c comprises the side wall part (rear side wall part) used as the other side wall, when the blank sheet 11 is boxed.

  Shutters 16 for separating the leading blank sheet 11 and the succeeding blank sheet 11 taken out from the take-out port are arranged so as to rotate integrally with the front end portion of each transport shaft 13 facing the take-out port. It is installed. Each shutter 16 is formed in a disk shape having a diameter larger than that of the conveying shaft 13, and supports the left and right corners of the lower end side of the leading blank sheet 11 that faces the takeout port at a portion protruding in the radial direction from the shaft 13. Composed. Each shutter 16 has a notch (not shown). When the notch arrives at a separation position corresponding to the lower edge of the blank sheet 11, the sheet 11 is allowed to pass (take out). Configured to allow. Both the shutters 16 and 16 are set to rotate once corresponding to the operation of taking out one blank sheet 11 by the sheet transfer means 19.

  The take-out port of the sheet magazine 12 is provided with a support (not shown for the side support) on the upper and left and right sides thereof, and is placed on the transport shafts 13 and 13 and has a lower end side. The upper end and the left and right end portions of the leading blank sheet 11 whose corners are supported by the shutters 16 and 16 are supported by these supports, and the leading blank sheet 11 facing the take-out port has its upper end. Is set to be in a forward tilted state. The left and right ends of the blank sheet group fed by the sheet feeding means 14 are guided and aligned by guides (not shown) disposed in the sheet magazine 12 and extending along the sheet feeding direction. ing.

  An auxiliary separation device 17 for separating the upper end portion of the leading blank sheet 11 from the succeeding blank sheet 11 is disposed above the take-out opening in the sheet magazine 12. The auxiliary separating device 17 includes a suction cup 17a that is connected to a suction means (not shown). The suction cup 17a moves forward and backward with respect to the blank sheet 11, so that the leading blank sheet 11 sucked and held at the time of advancement of the suction cup 17a is moved. The upper end is configured to be separated from the subsequent blank sheet 11 when retreating.

  The caser 10 is provided with a folding conveyance device 18 that bends the blank sheet 11 taken out from the sheet magazine 12 and conveys it to the downstream side while maintaining the folded state. The folding and conveying device 18 takes out the blank sheets 11 from the sheet magazine 12 one by one and transfers them downward, and the blank sheets 11 delivered from the transferring means 19 into the sheets in the sheet magazine. A conveying conveyor 20 that conveys in the direction opposite to the feeding direction, a folding member 21 that supports the front bent portion 11b of the folded blank sheet 11 conveyed by the conveying conveyor 20 from the front side in the conveying direction, and the conveying And a transfer conveyor 22 that further transfers the blank sheet 11 received from the conveyor 20 to the downstream side in a U-shaped posture with an upper opening.

  The sheet transfer means 19 is disposed below the auxiliary separating device 17 outside the take-out port in the sheet magazine 12. As shown in FIG. 1, the sheet transfer means 19 includes a plurality of suction cups (suction portions) 23, and a plurality of sets (two in the embodiment) of take-out portions 24 to which a required operation is given by a rotation mechanism (not shown). Each of the blank sheets 11 is picked up and taken out one by one from the sheet magazine 12 by each take-out portion 24. Each suction cup 23 is connected to a suction means (not shown), and is set to perform suction holding and suction release of the blank sheet 11 by each suction cup 23 by performing ON-OFF control of the suction means at an appropriate timing. It is. Each take-out portion 24 is close to the bottom wall portion 11a and the rear bent portion 11c on the inner side surface during the box-making of the leading blank sheet 11 facing the take-out port of the sheet magazine 12 when taking out the sheet. It is configured to move slightly upward while moving away from the track, and then follow a locus that moves downward. As a result, the blank sheet 11 taken out from the sheet magazine 12 with the inner surface during box making corresponding to the bottom wall portion 11a and the rear bent portion 11c (lower bent portion 11e) being sucked and held by the takeout portion 24 is The lower side of the blank sheet 11 is separated from the lower end of the subsequent blank sheet 11 so that the lower end side is lifted upward and then taken out from the take-out port, and then the inner side (attraction surface by the suction cup 23) at the time of making the box The posture is changed so as to face upward, and it is moved downward. And, when the lower end portion of the leading blank sheet 11 is taken out from the take-out port, the notch portions of the left and right shutters 16 arrive at the separation positions corresponding to the left and right corner portions of the lower end side, respectively. It is set to allow sheet removal.

  In the sheet transfer means 19, a pair of auxiliary bending members 25, 25 (only one located on one side in the left-right direction) spaced apart in the left-right direction corresponding to each take-out portion 24 are arranged in parallel. Has been. The auxiliary folding members 25, 25 have an outer surface (hereinafter referred to as an outer surface at the time of box making) when the blank sheet 11 sucked and held by the take-out portion 24 is boxed. When making the bottom wall portion side (downward bent portion side) near the fold line 11d formed between the bottom wall portion 11a and the front bent portion 11b of the blank sheet 11 It positions so that it may support from the inner surface of this, and functions in order to perform the bending of the blank sheet 11 favorably. In addition, when the blank sheet 11 is delivered to the transport conveyor 20, the auxiliary folding members 25, 25 are set so as to push the inner side surface of the sheet 11 during box making, so that the blank sheet 11 can be securely attached from the take-out portion 24. It is supposed to be separated.

  As shown in FIG. 1, between the machine frames 26 that are separated from each other in the caser 10 on the left and right sides, below the sheet magazine 12, on the downstream side in the sheet conveying direction by the conveying conveyor 20 from the arrangement position of the sheet conveying means 19. Rotating shafts 27 and 28 extending in the left-right direction at a predetermined interval in the sheet conveying direction are pivotally supported at the positions. As shown in FIG. 2, the first rotating shaft 27 located on the upstream side in the sheet conveying direction is pivotally supported in a cantilevered manner inside each machine frame 26 and is separated in the left-right direction, and each first rotation. A small-diameter first sprocket (rotary body) 29 (only one of them is shown) is disposed on the shaft 27 so as to be integrally rotatable. The first rotating shafts 27 and 27 and the first sprockets 29 and 29 that are paired on the left and right sides are separated by a dimension that allows the blank sheet 11 conveyed by the conveying conveyor 20 to pass through without interfering with the first rotating shafts 27 and 27. On the other hand, the second rotary shaft 28 located on the downstream side is constructed between the machine casings 26 and 26, and is spaced apart in the axial direction to have large-diameter second sprockets (rotators) 30 and 30 (one side). Only end) is disposed so as to be rotatable integrally with each other, and endless chains (endless cords) 31 are respectively wound between corresponding first and second sprockets 29 and 30. As shown in FIGS. 1 and 3, a variable speed motor 33 such as a servo motor is connected to the second rotating shaft 28 via a transmission means 32 such as a pulley or a belt, and the second rotating shaft 28 is connected by the motor 33. By rotating, the pair of endless chains 31, 31 are configured to travel in a predetermined direction. Further, between the endless chains 31, 31, a plurality of rod-like folds (four in the embodiment, but may be any other number) are spaced apart by a predetermined distance in the traveling direction (moving direction). The member 21 is installed so as to extend in parallel with the width direction (left-right direction) of the blank sheet 11 transferred by the sheet transfer means 19, and the folding member 21 is moved in a predetermined direction by the travel of the endless chains 31, 31. To move to. That is, in the embodiment, the variable speed motor 33, the transmission means 32, the sprockets 29 and 30, and the endless chains 31 and 31 constitute a driving means for the bending member 21.

  As shown in FIG. 2, the movement trajectory of the bending member 21 that is moved by the travel of the endless chains 31 and 31 is located on the first turning portion located near the sheet transfer means 19 and on the downstream side of the conveying conveyor 20. The second turning portion and the upper and lower straight portions connecting these turning portions. The first turning portion is set so as to be located in the transfer locus of the blank sheet 11 transferred by the sheet transfer means 19 and is outside the box making corresponding to the front bent portion 11b in the blank sheet 11. The side surface is configured to abut on the bending member 21 in parallel. The endless chains 31 and 31 are set so as to be separated from the width dimension (left and right dimension) of the blank sheet 11, and the blank sheet 11 has a width on the bending member 21 installed between the endless chains 31 and 31. It abuts in parallel over the entire length of the direction.

  The second rotary shaft 28 is positioned above the first rotary shaft 27, and the linear portion of the endless chain 31 that faces the first sprocket 29 and the second sprocket 30 is the sheet transport direction in the transport conveyor 20. Is set to incline upward from the upstream side to the downstream side. The second rotating shaft 28 has endless chains 31 and 31 that travel on the upper straight portion from the second sprocket 30 and 30 toward the first sprocket 29 and 29, and on the lower straight portion and the first sprocket 29 and 29. It is rotated so as to travel from 29 to the second sprocket 30,30. That is, the bending member 21 moves the upper straight portion downward from the second turning portion toward the first turning portion in the movement locus, and moves the lower straight portion from the first turning portion to the first turning portion. It is set to move upward toward the second turning portion. Therefore, when the bending member 21 supporting the front bending portion 11b of the blank sheet 11 moves on the lower straight portion in the movement locus, the bending member 21 gradually moves upward. The support position with respect to the front bent portion 11b is changed to the downstream side, and finally it is separated from the front bent portion 11b to release the support. In addition, the bending member 21 that moves the lower straight portion in the movement trajectory has an angle with respect to the bottom wall portion 11a (downward bending portion 11e) of the front bending portion 11b in the blank sheet 11 (inner angle when boxed). The variable speed motor 33 is moved so as to move downstream in synchronization with the speed of the transport conveyor 20 so that the corresponding angle is gradually decreased as it is transported downstream (approaching 90 °). Is to be controlled.

  As shown in FIG. 1 and FIG. 2, the forward folding portion 11 b is bent upward by the folding member 21 in the transport conveyor 20 disposed below the sheet transfer means 19. The blank sheet 11 is configured to be delivered from the transfer means 19. At this time, the angle of the front bent portion 11b with respect to the bottom wall portion 11a, which should be 90 ° when boxed, is larger than 90 °, and the blank sheet 11 is in an incompletely bent state. The sheet conveying direction of the conveying conveyor 20 is set to be opposite to the sheet feeding direction of the blank sheet 11 in the sheet magazine 12.

  As shown in FIG. 4, the transport conveyor 20 includes a first suction conveyor 34 and a pair of second suction conveyors 35, 35 arranged in parallel on both the left and right sides of the first suction conveyor 34. The first suction conveyor 34 is configured by winding a first suction belt 37 between a pair of first pulleys 36 and 36 that are separated in the front and rear directions in the sheet conveying direction. Configured to run at speed. The first suction belt 37 is provided with a plurality of first suction hole groups 37a each having a plurality of suction holes at a predetermined interval in the traveling direction, and on the lower surface side of the upper running path in the first suction belt 37, the first suction belt 37 is illustrated in the drawing. A blank sheet 11 is formed on the upper surface of the belt by a first suction chamber 38 connected to a suction source that is not in contact with a suction force acting through a through hole (not shown) on the upper surface of the first suction chamber 38 and the first suction hole group 37a. The bottom wall portion 11a is configured to suck and hold the central portion in the width direction.

  The upper runway for transporting the blank sheet 11 in the first suction belt 37 extends downstream from the delivery position of the blank sheet 11 from the sheet transfer means 19 by a predetermined length and is shown in FIG. Thus, the blank sheet 11 is smoothly delivered from the sheet transfer means 19 by being inclined so that the upstream side is upward.

  Each of the second suction conveyors 35 is spaced apart from the first suction conveyor 34 by a predetermined distance in the left-right direction, and the second suction belt 40 is interposed between a pair of second pulleys 39, 39 that are spaced forward and backward in the sheet conveying direction. The second suction belt 40 is wound around and driven in parallel with the first suction belt 37 at a predetermined speed by a drive motor (not shown). The upper runway in the second suction belt 40 is set at the same level as the first suction belt 37, and the left and right flaps connected to the bottom wall portion 11a of the blank sheet 11 conveyed by the first suction conveyor 34 are provided. It is supposed to be listed. The second suction belt 40 is provided with a plurality of second suction hole groups 40a made up of a plurality of suction holes at a predetermined interval in the running direction, and on the lower surface side of the upper running path in the second suction belt 40, the second suction belt 40 is illustrated. The second suction chamber 41 connected to the suction source not in contact is in contact with the upper surface of the belt by a suction force acting through a through hole (not shown) on the upper surface of the second suction chamber 41 and the second suction hole group 40a. Configured to adsorb and hold. That is, in the embodiment, the first and second suction hole groups 37a and 40a and the first and second suction chambers 38 and 41 constitute a holding means for the blank sheet 11 (downward bent portion 11e).

  The second suction conveyor 35 is downstream of the delivery position of the blank sheet 11 to the first suction conveyor 34 by the sheet transfer means 19, and the rear bent portion 11c is supported by support members 44 and 45 of the transfer conveyor 22 described later. It is provided in the area | region bent upwards. After the rear bent portion 11c is bent so as to be generally upright, the through hole of the first suction chamber 38 is released so that the suction to the bottom wall portion 11a of the first suction conveyor 34 is released. Is formed. Accordingly, the rear bent portion 11c is erected by the supporting members 44 and 45 in a state where the bottom wall portion 11a and the left and right flaps connected to the bottom wall portion 11a are sucked and held by the first and second suction conveyors 34 and 35, respectively. After that, the blank sheet 11 is conveyed to the transfer conveyor 22 described later by the second suction conveyor 35.

  Between the first suction conveyor 34 and each second suction conveyor 35, a transfer conveyor 22 that receives the blank sheet 11 from the transport conveyor 20 and transfers it further downstream is disposed. Each transfer conveyor 22 travels on a vertical plane and is spaced in parallel with the horizontal direction, and is projected to the outside of the loop of each endless chain 43 and travel direction (progress) The chain 43, 43, which is composed of a plurality of support members 44, 45 disposed at predetermined intervals in the direction) and travels on the upper travel path, is guided by a guide plate 46 disposed horizontally below the chain 43, 43. It has come to be. The support members 44 and 45 disposed on the endless chains 43 and 43 are disposed in a staggered relationship with respect to the traveling direction, and the distance between the support members 44 and 45 is the sheet on the bottom wall portion 11a of the blank sheet 11. It is set slightly larger than the length dimension in the conveying direction. Further, in the double transfer conveyors 22 and 22 of the embodiment, as shown in FIG. 4, the support members 44 and 44 facing the inner side (first suction conveyor side) are aligned in the left-right direction, and the outer side (second suction conveyor side). The support members 45 and 45 that face each other are aligned in the left-right direction, and the blank sheet 11 in the bent state is held in a state of being sandwiched from the front and rear by the inner support members 44 and 44 and the outer support members 45 and 45. It is configured as follows. In both transfer conveyors 22 and 22, the left and right sides of the blank sheet 11 conveyed by the first suction conveyor 34 are held in a U-shape opened upward by a pair of support members 44 and 45 positioned at the front and rear. And it is comprised so that it may move horizontally downstream.

  The upstream end of the endless chain 43 in the transfer conveyor 22 is located on the downstream side of the upstream end of the second suction conveyor 35, and the upper travel path is a transport surface of the transport conveyor 20 as shown in FIG. Support members 44 and 45 which are set to be located below (the upper running path in the suction belts 37 and 40) and move the upstream turning portion of the transfer conveyor 22 from the lower side to the upper side are conveyed by the conveyor 20 It is comprised so that it may contact | abut from the lower side with respect to the back bending part 11c of the blank sheet 11, and this may be bent upwards. Further, the speed of the transport conveyor 20 is set to be higher than the speed of the transfer conveyor 22, and the front bent portions 11 b of the blank sheet 11 transported by the transport conveyor 20 are moved to the support members 44 and 45 that precede the transfer conveyor 22. It is comprised so that it may position so that it may contact | abut from the back side. The two transfer conveyors 22 and 22 are driven by a drive motor (not shown) so that their running speeds are the same, and the running speeds of the first suction conveyor 34, the second suction conveyor 35 and the transfer conveyor 22 are as follows. The two suction conveyors 35 <the first suction conveyor 34. Further, the downstream end of the second suction conveyor 35 in the transfer conveyor 20 is set to be positioned below the placement surface (not shown) of the bottom wall portion 11 a in the transfer conveyor 22, and is received by the transfer conveyor 22. The suction holding is released when the second suction belt 40 is separated downward from both the flaps connected to the bottom wall portion 11a of the blank sheet 11 thus formed.

(Effects of Example)
Next, the operation of the blank sheet folding and conveying apparatus according to the above-described embodiment will be described.

  A plurality of blank sheets 11 are stacked on the sheet magazine 12 in such a manner that the lower ends are placed on the conveying shafts 13 and 13, and the leading blank sheet 11 facing the take-out port is placed on the support and shutter 16. , 16, the blank sheet group is in a state in which its upper end is inclined forward. Further, the leading blank sheet 11 has an inner surface at the time of box making facing outward from the take-out port, and the rear bent portion 11c is positioned on the lower side.

  When sheet take-out by the sheet transfer means 19 is started, the take-out part 24 comes close to the inner side surface at the time of boxing corresponding to the bottom wall part 11a and the rear bent part 11c of the leading blank sheet 11 in the sheet magazine 12, The suction cup 23 comes into contact with and holds the blank sheet 11. Before the suction cup 23 of the sheet transfer means 19 sucks the blank sheet 11, the auxiliary separation device 17 operates to separate the upper end portion of the leading blank sheet 11 from the subsequent blank sheet 11.

  The take-out portion 24 that sucks and holds the lower end side of the leading blank sheet 11 moves upward while being separated from the take-out port, so that the lower end portion of the leading blank sheet 11 is rolled upward. It is spaced apart from the lower end of the sheet 11. At this time, the notches of the shutters 16 and 16 rotated corresponding to the operation of the sheet transfer means 19 arrive at the separation position corresponding to the lower edge of the leading blank sheet 11, and the blank sheet 11 is acceptable.

  Thereafter, the take-out portion 24 of the sheet transfer means 19 moves downward, and accordingly, the blank sheet 11 taken out from the sheet magazine 12 is transferred downward. At this time, the posture of the suction cup 23 is changed so that the sheet suction port gradually faces downward while being separated from the sheet magazine 12. That is, the blank sheet 11 sucked and held by the suction cup 23 is transported downward in such a posture that the inner surface during box making faces upward and the outer surface during box making faces downward.

  While the outer surface of the blank sheet 11 sucked and held by the take-out part 24 is transported downward, the bottom wall part 11a sucked and held by the take-out part 24 is bent line 11d. The outer side surface at the time of box making corresponding to the front bent portion 11b located on the front side in the sheet conveying direction of the conveying conveyor 20 on the conveyance conveyor 20 faces the upper straight portion in the vicinity of the first turning portion in the movement locus. As the blank sheet 11 is further moved downward, the front bent portion 11b is directed upward along the fold line 11d as it contacts the bent member 21 over the entire length in the width direction. It is bent (see Fig. 2). At this time, the bottom wall portion side in the vicinity of the fold line 11d formed between the bottom wall portion 11a of the blank sheet 11 and the front bent portion 11b is the inner side of the auxiliary folding members 25, 25 during box making. The blank sheet 11 is supported from the side and is bent well. Further, the take-out part 24 of the sheet transfer means 19 sucks and holds a surface (outer side surface during box making) opposite to the surface (outer side surface during box making) of the blank sheet 11 that contacts the bending member 21. Therefore, the folding of the sheet 11 is achieved without the blank sheet 11 being peeled off from the take-out portion 24 when the bending member 21 is in contact.

  When the take-out part 24 comes to the position before the delivery position of the blank sheet 11 to the conveyor 20, the suction means is turned off and the suction of the blank sheet 11 by the suction cup 23 is released. As a result, the blank sheet 11 is folded in the upstream portion of the transport conveyor 20 in such a state that the front bent portion 11b is bent upward and the inner surface during box making faces upward (the incompletely bent state). ).

  The folded blank sheet 11 delivered to the transport conveyor 20 is subjected to a suction force acting through the first suction hole group 37a of the first suction conveyor 34 at the time of box making corresponding to the bottom wall portion 11a. With the central portion of the outer side in the width direction being sucked and held by the first suction belt 37, it is stably conveyed toward the downstream side. At this time, the front bent portion 11b that is located on the front side in the sheet conveying direction and rises at a required angle with respect to the bottom wall portion 11a is supported from the front side in the conveying direction by the bending member 21, and is bent forward. The part 11b is conveyed without opening with respect to the bottom wall part 11a.

  The front bending member 11b supported by the bending member 21 by the bending member 21 moving downstream in the movement locus in synchronization with the transport conveyor 20 is shown in FIG. As shown in FIG. 2, it is bent upward so that the angle with the bottom wall portion 11a gradually decreases toward the downstream side (closer to 90 °). Thus, since the position of the bending member 21 changes downstream in synchronization with the speed of the conveyor 20, the front bent portion 11 b of the blank sheet 11 is bent well. Moreover, since the some bending member 21 is arrange | positioned in the endless chains 31 and 31, it can respond to the high-speed conveyance of the blank sheet 11 with a simple structure. Moreover, since the endless chains 31 and 31 on which the bending member 21 is disposed are driven by the variable speed motor 33, the timing when the blank sheet 11 abuts against the bending member 21 (the bending member 21 is bent forward). The timing at which the support for the portion 11b is started can be changed, the sheet 11 can be bent well, and the size change of the blank sheet 11 can be easily handled.

  In the blank sheet 11 in which the bottom wall portion 11a is sucked and held by the first suction conveyor 34 of the conveyor 20, the left and right flaps connected to the bottom wall portion 11a are connected to the second suction conveyors 35, 35. On the second suction belts 40, 40 traveling on the upper runway, and the outer surface of the two flaps during the box making is made by the suction force acting via the second suction hole groups 40a, 40a. While being sucked and held by 40, it is stably transported further downstream.

  The speed of the transport conveyor 20 that transports the folded blank sheet 11 toward the transfer conveyor 22 is set to be higher than the speed of the transfer conveyor 22 and moves on the upper traveling path in the transfer conveyor 22. The front bent portion 11b of the blank sheet 11 transported by the transport conveyor 20 is abutted from the rear with respect to the preceding inner support members 44, 44 or the outer support members 45, 45, and is suitably positioned. At this time, the bending member 21 gradually moves upward while moving to the downstream side, so that it is separated from the front bending portion 11b to release the support, and close to 90 ° with respect to the bottom wall portion 11a. The bent front bent portion 11b is brought into an upright bent state by contacting the support members 44, 44 or the support members 45, 45.

  After the front bent portion 11b moves with respect to the blank sheet 11 supported by the preceding support members 44 and 44 or the support members 45 and 45 so as to rise from the lower side to the upper side in the upstream turning portion. The row support members 45, 45 or the support members 44, 44 abut against the rear bent portion 11c located on the rear side of the bottom wall portion 11a from below and turn it upward along the bend line 11d. Bend it upright. At this time, the bottom wall portion 11a of the blank sheet 11 and the left and right flaps connected thereto are respectively a first suction hole group 37a of the first suction conveyor 34 and a second suction hole group 40a of the second suction conveyors 35, 35. Since it is adsorbed and held by 40a, the rear bent portion 11c is favorably bent along the bend line 11d. When the subsequent support members 45 and 45 or the support members 44 and 44 are completely moved to the upper travel path, the blank sheet 11 is supported by the preceding support members 44 and 44 or the support members 45 and 45 and the subsequent support. The members 45 and 45 or the support members 44 and 44 are held in a U-shaped bent state that opens upward, and are conveyed downstream in this state and delivered to the transfer conveyor 22.

  That is, in the folding and conveying apparatus 18 of the embodiment, the blank sheet 11 delivered from the sheet transfer means 19 to the conveying conveyor 20 is conveyed with the bottom wall portion 11a (lower bent portion 11e) held by the conveying conveyor 20. In addition, since the front bent portion 11b is supported from the front side in the conveying direction by the bending member 21 that moves downstream in synchronization with the conveying conveyor 20, the folded state of the sheet 11 is maintained. And can be transported stably. Moreover, in this state, since the angle of the front bending part 11b with respect to the bottom wall part 11a is made into an angle (small angle) different from the angle at the time of delivery to the conveyance conveyor 20, the bending state of the blank sheet 11 is carried out. Is kept good. That is, even if it is the blank sheet 11 which is easy to return to the original when bent, due to properties such as thickness and material, the front bent portion 11b does not return to the original, and folding is achieved with good conveyance. The Further, since the folding member 21 is also configured to be used as a means for folding the blank sheet 11 transferred by the sheet transfer means 19, the configuration can be simplified.

[Example of change]
The present application is not limited to the configuration of the above-described embodiment, and other configurations can be appropriately employed.
1. The bending member 21 is not moved (changes the position) by the dedicated drive means 29, 30, 31, 32, 33 as in the embodiment, but is not the sheet transfer means 19, the transfer conveyor 20, or the transfer conveyor. It can be configured to mechanically connect with other mechanisms such as 22 and move in synchronization therewith.
2. In the embodiment, the blank sheet 11 is taken out from the sheet magazine 12 by sucking and taking out the inner side surface at the time of box making by the sheet transfer means 19, but the outer side at the time of box making is directed toward the take-out port. In this way, the present apparatus can be applied to a sheet magazine 12 in which blank sheets 11 are accumulated, and the sheet transfer means 19 adsorbs the outer surface during box making to take out the sheet 11.
3. After the front bent portion 11b of the blank sheet 11 transferred by the sheet transfer means 19 is bent by the fixed bending means, the front bent portion 11b of the blank sheet 11 transferred by the transfer conveyor 20 The front side in the conveyance direction is supported by a bending member 21 arranged in the endless chains 31 and 31 that are configured in the same manner as in the embodiment, or a bending member that moves back and forth in the conveyance direction of the conveyor 20. Supporting configurations may be employed.
4. The bending member 21 is arranged in the endless chains 31 and 31 and circulates. For example, the folding sheet 21 is combined with vertical movement and forward and backward movement along the conveying direction of the conveying conveyor 20 so that the blank sheet 11 is transferred to the conveying conveyor 20. The blank sheet 11 may be bent when it is transported, and may be operated so as to support the front side in the transport direction of the front bent portion 11 b when transported by the transport conveyor 20. In this case, the folding member 21 can be moved only at a portion where the blank sheet 11 needs to be supported with respect to the front bent portion 11b, and the apparatus can be made compact.
5. You may arrange | position both the 2nd adsorption | suction conveyors 35 and 35 so that the right-and-left both ends side of the bottom wall part 11a may be adsorbed and hold instead of a flap.

It is a schematic block diagram which shows the caser which employ | adopted the bending conveyance apparatus of the blank sheet which concerns on an Example. It is a schematic block diagram which shows the principal part of the bending conveyance apparatus which concerns on an Example. It is a principal part schematic front view which shows the bending member which concerns on an Example, and a part of its drive means. It is a schematic plan view which shows the conveyance conveyor and transfer conveyor which concern on an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Blank sheet, 11b Forward bending part, 11d Folding line, 11e Lower bending part 12 Sheet magazine, 19 Sheet transfer means, 20 Conveyor, 21 Folding member 22 Transfer conveyor, 25 Auxiliary bending member 29 1st sprocket (Rotating body, driving means), 30 Second sprocket (Rotating body, driving means)
31 endless chain (endless cable body, drive means), 32 transmission means (drive means)
33 variable speed motor (drive means), 44 support member, 45 support member

Claims (9)

From a sheet magazine (12) in which a plurality of blank sheets (11) are collected, a sheet transfer means (19) for sucking and taking out the blank sheets (11) and transferring them downward,
A holding means (37a, 38, 40a, a lower bent portion (11e) of the blank sheet (11) in a bent state provided below the sheet magazine (12) and delivered from the sheet transfer means (19). 41) a transfer conveyor (20) for holding and transferring,
The lower folding portion (11e) of the blank sheet (11) held by the holding means (37a, 38, 40a, 41) is located on the front side in the transport direction of the transport conveyor (20) and is transported. A bending member (21) for supporting the front bent portion (11b) of the blank sheet (11) bent so as to rise from the conveyor (20) from the front side in the conveying direction;
As the transport conveyor (20) holds and transports the folded blank sheet (11), the front folding section (11b) is at a predetermined angle with respect to the lower folding section (11e). The driving means (29, 30, 31, 32, 33) for changing the support position of the bending member (21) with respect to the front bent portion (11b) to the downstream side, Blank sheet folding and conveying device.   The driving means (29, 30, 31, 32, 33) is configured to synchronize the support position of the bending member (21) with respect to the front bent portion (11b) in synchronization with the speed of the transport conveyor (20). 2. The blank sheet folding and conveying apparatus according to claim 1, wherein the bending folding apparatus is set so that the angle of the front bent portion (11b) with respect to the lower bent portion (11e) is decreased toward the downstream side.   The drive means (29, 30, 31, 32, 33) is configured to change the support position of the bending member (21) with respect to the front bent portion (11b) to the downstream side of the conveyor (20). 3. The blank sheet folding and conveying apparatus according to claim 1 or 2, wherein the folding and conveying apparatus is configured to release the support to the front bent portion (11b) by gradually changing the upward direction.   The driving means (29, 30, 31, 32, 33) includes an endless cord (31) that is wound around the rotating body (29, 30) and moves in one direction, and the endless cord (31) On the other hand, a plurality of the folding members (21) are provided at predetermined intervals in the moving direction, and each folding member (21) is configured to be able to support both sides in the width direction of the blank sheet (11). The bending conveyance apparatus of the blank sheet in any one of claim | item 1-3.   The blank sheet folding and conveying apparatus according to any one of claims 1 to 4, wherein the driving means (29, 30, 31, 32, 33) uses a variable speed motor (33) as a driving source.   Before the sheet conveying means (19) adsorbs the portion that becomes the lower bent portion (11e) and the blank sheet (11) taken out from the sheet magazine (12) is delivered to the conveyor (20). The blank sheet according to any one of claims 1 to 5, wherein the blank sheet (11) is brought into contact with the folding member (21) to bend the front bent portion (11b) upward. Bending conveyor.   When the blank sheet (11) comes into contact with the bending member (21), the folding formed between the lower bent portion (11e) and the front bent portion (11b) of the blank sheet (11). 7. The blank sheet folding and conveying apparatus according to claim 6, further comprising an auxiliary bending member (25) for supporting a lower bent portion side in the vicinity of the bending line (11d) from an inner surface when the box is boxed.   The sheet transfer means (19) adsorbs the inner surface of the blank sheet (11) when it is boxed and takes out the sheet (11) from the sheet magazine (12). The bending conveyance apparatus of the blank sheet in any one of Claims 1-7 comprised so that a blank sheet (11) may be delivered to the said conveyance conveyor (20) in the state which faced. The blank sheet (11) in the folded state is received from the transport conveyor (20), and is sandwiched between support members (44, 45) in the forward and backward directions, and the sheet (11) is folded into a U-shape that opens upward. It has a transfer conveyor (22) to be bent and transferred,
The speed of the transfer conveyor (20) is set to be higher than the speed of the transfer conveyor (22), and the front bent portion (11b) of the blank sheet (11) transferred by the transfer conveyor (20) is moved to the transfer conveyor. The blank sheet bending and conveying apparatus according to any one of claims 1 to 8, wherein the bending and conveying apparatus is configured to be positioned in contact with the preceding support member (44, 45) of (22).

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