JP5925045B2 - Spiral folding device for long sheets - Google Patents

Description

  The present invention relates to a long sheet zigzag folding device that is preferably used for a bubble sheet or the like.

  Conventionally, a long sheet such as a bubble sheet is manufactured continuously in a production line, and a long sheet fed out from the production line is wound up in a final stage and is generally shipped in a roll shape. (For example, see Patent Document 1).

  However, the roll-shaped long sheet has a certain limit for arranging it closely without gaps, and wasteful space is likely to be generated when the sheet is stored in a warehouse or transported.

  In order to respond to such circumstances, recently, measures have been started to reduce the useless space and improve the space efficiency by folding the long sheet, and efficiently and reliably fold the long sheet. The appearance of a device for doing this is desired.

JP 2004-284731 A

  The present invention has been made paying attention to the circumstances as described above, and is to provide a zigzag folding device for a long sheet that can efficiently and reliably fold a long sheet.

  That is, the long sheet sheet folding apparatus of the present invention has the following configuration.

The long sheet zigzag folding device according to claim 1, wherein the long sheet zigzag folding device is used for folding the long sheets by alternately folding back the long sheets, and supplies the long sheets downward. A supply mechanism, a first state that is disposed on both sides of the long sheet supplied by the sheet supply mechanism and that holds the folded portion of the long sheet and a released state that can receive and release the folded portion. , A pair of slides that guide to the delivery position to the opposing holder while standing on the upper side of the first and second holders and pressing the long sheet to form the folded portion A derivative and a guide for guiding both the slide derivatives so that the slide trajectory from each standby position to each delivery position intersects each other. A mechanism, a slide derivative drive mechanism that alternately reciprocates the both slide derivatives from the standby position to the delivery position, and a required period each time the corresponding slide derivative reaches the delivery position with both the holders in the released state. a holder driving mechanism only in the holding state, the first, Ri Na and and a mounting table for supporting the second long sheet became successively released in zigzag state from the holder, wherein said derivative guide mechanism, Ru der substantially those set horizontally sliding trajectory of the other slide derivatives with setting the sliding trajectory of one of the slide derivative diagonally.

  If this is the case, the slide trajectories from each standby position to each delivery position in the paired slide derivatives cross each other, so the relative positions of the first and second holders are moved. The long sheet can be folded in an efficient and reliable manner.

  According to a second aspect of the present invention, there is provided the long sheet folding device according to the first aspect, wherein the folded portion of the long sheet released from each holder is switched forward when the holding state is switched to the released state. The first and second pressing tools for pressing in the mounting table direction are provided.

  If it is such, even if each holder switches from the holding state to the released state, the folded portion of the long sheet will be pressed by the first and second pressing tools, It is possible to suppress the variation and realize more reliable spell folding.

If it is based on Claim 1, the structure for the slide locus | trajectory from each waiting position to each delivery position in a slide derivative which makes a pair cross | intersect mutually is set, and the slide locus | trajectory of the other slide derivative | guide_body is set substantially horizontal. As a result, it is possible to suitably suppress the complexity of the device structure.

According to a third aspect of the present invention, there is provided the sheet folding device for a long sheet according to the first or second aspect , wherein the derivative guide mechanism includes an oblique guide portion that defines a slide locus of one slide derivative, and an other slide derivative. A horizontal guide rail that defines a slide locus, wherein the oblique guide portion is disposed substantially horizontally, and a horizontal slider that is guided by the horizontal guide rail and moves back and forth in the horizontal direction; a lift member for supporting the sliding derivative of the hand with vertically movably held the upper end to the horizontal slider, in which a lifting mechanism for the lifting member up and down by utilizing the reciprocating operation of the horizontal slider .

  If it is such, the slide locus | trajectory set diagonally of one slide derivative | guide_body will be realizable by cooperation with a horizontal slider, a raising / lowering member, and a raising / lowering mechanism.

According to a fourth aspect of the present invention, in the configuration according to the third aspect , the elevating mechanism includes a cam follower provided at a lower end portion of the elevating member and an oblique guide rail for guiding the cam follower. It is a thing.

  If it is such, the raising / lowering of the raising / lowering member can be implement | achieved by what is called a cam mechanism using the guide rail and cam follower which are cams.

According to a fifth aspect of the present invention, there is provided the sheet folding device according to the first, second, third, or fourth aspect, wherein the slide derivative is rotatably provided with a pressing roller on a front end side that presses the long sheet. It is a thing.

  If it is such, the operation | movement which presses the surface of the elongate sheet | seat by a slide derivative | guide_body can be implement | achieved smoothly and reliably.

The long sheet sheet folding apparatus according to claim 6 is the configuration according to claim 1, 2, 3, 4 or 5, wherein the first and second holders are a holder body and the holder body. A pair of sandwiching members supported at the front end of the holder so as to be pivotable in the vertical direction. In the released state, the sandwiching member is equal to or behind the front end surface of the holder body. It is comprised so that it may rotate to the position to refrain from.

  In such a case, in the released state, the clamping member is configured to rotate to a position that is the same as the front end surface of the holder main body or a position that is behind the front end surface. When the folded portion of the long sheet is released by the holder, the folded portion does not interfere with the holding member of the holder, and the folded portion can be smoothly guided downward.

  As described above, according to the present invention, it is possible to provide a long sheet zigzag folding device that can efficiently and surely fold long sheets.

The front view which shows one Embodiment of this invention. The perspective view in the embodiment. Operation | movement explanatory drawing of the embodiment. Operation | movement explanatory drawing of the embodiment. Operation | movement explanatory drawing of the embodiment. Operation | movement explanatory drawing of the embodiment. Operation | movement explanatory drawing of the embodiment. The timing chart in the same embodiment. Explanatory drawing for demonstrating the slide locus | trajectory of the slide derivative | guide_body in the same embodiment. FIG. 10 is an explanatory diagram corresponding to FIG. 9 showing a reference example of a slide locus. FIG. 10 is an explanatory diagram corresponding to FIG. 9 showing a reference example of a slide locus.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a spelling folding device D for folding a long sheet S.

  The long sheet S in this embodiment has a configuration called a bubble sheet. That is, the long sheet S is lightweight and excellent in cushioning properties, and is widely used as a buffer packaging material or a heat insulating material. The long sheet S includes a cap film in which a plurality of protruding caps are formed and a flat back film that is bonded to the bottom of the cap film (not shown), or these cap films. In addition to the back film, the cap film includes a flat liner film that is bonded to the top side of the cap (not shown), and is continuously manufactured in a production line (not shown) as is well known. The

  The zigzag folding device D is for zigzag folding the long sheets S that are gradually fed out from the production line, and supplies the long sheets S downward, and the sheet supply mechanism 2. The holding state (h) for holding the folded portion sf of the long sheet S and the released state (k) in which the folded portion sf can be received and released can be adopted. The second holding tools H1 and H2 and the holding tools H1 and H2 that face each other while waiting on the upper side of the first and second holding tools H1 and H2 and pressing the long sheet S to form the folded portion sf. A pair of slide derivatives Y1 and Y2 that lead to the transfer position (u) to the transfer position (u), and slide gauges from the standby positions (t) to the transfer positions (u) in the slide derivatives Y1 and Y2 The derivative guide mechanism 3 that guides both slide derivatives Y1 and Y2 so that tr1 and tr2 cross each other, and both slide derivatives Y1 and Y2 are alternately reciprocated from the standby position (t) to the transfer position (u). The slide derivative drive mechanism 4 and both holders H1 and H2 are set in the released state (k), and each time the corresponding slide derivatives Y1 and Y2 reach the delivery position (u), the hold state (h) is set for the required period. The holder driving mechanism 5 and the mounting table 6 that supports the long sheet S that has been sequentially released from the first and second holders H1 and H2 and is in a folded state.

  The sheet supply mechanism 2 is configured such that a long sheet S fed out from a production line is sandwiched by nip rolls 21 and supplied downward at a constant speed.

  The first and second holders H1 and H2 include holder bodies H11 and H21, and a pair of sandwiching members H12 and H22 that are supported at the tips of the holder bodies H11 and H21 so as to be pivotable in the vertical direction. And is supported by the apparatus frame 1 with the front end surfaces H111 and H211 that form a substantially vertical posture of the holder main bodies H11 and 21 facing each other. The first holder H1 is disposed at a position lower than the second holder H2 by a certain distance. More specifically, the zigzag folding device D includes two partition walls w arranged facing each other in a substantially vertical posture so as to form a zigzag folding space sp. In addition, a plurality of, for example, four first holders H1 are arranged on one partition wall w with a predetermined interval in the width direction of the long sheet S, and a plurality of, for example, Four second holders H2 are arranged in the width direction of the long sheet S with a required interval.

  If it demonstrates concretely, in each partition w, the holder arrangement | positioning part w11 which is the space for arrange | positioning the holders H1 and H2, and the holder insertion which is the space for moving the holders P1 and P2 are penetrated. A window w1 having a configuration in which the portion w12 is continuous is formed at a plurality of locations with a required interval, and the first and second holders H1 and H2 are formed in the holding portion arrangement portion w11 of each window w1. Is arranged. The holder main bodies H11 and H21 of the first and second holders H1 and H2 are formed in a prismatic shape with the tip side projecting into the folding space sp through the window w1 and constitute the holder driving mechanism 5 inside. An actuator (not shown) is accommodated. The clamping members H12 and H22 forming a pair of the first and second holders H1 and H2 are pivotally attached to the holder bodies H11 and H21 via horizontal pins (not shown), respectively, and are opened and closed by being urged by an actuator. Rotating arms H121, H122, H221, and H222 that form a pair, and elastic sandwiching pads p provided at the rotating ends of the pair of turning arms H121, H122, H221, and H222, respectively. In the holding state, the upper and lower rotating arms H121, H122, H221, and H222 are rotated to a substantially horizontal position so that the folded portion sf of the long sheet S can be sandwiched from above and below. In the released state (k), the upper rotating arms H121 and H221 rotate until the holding pad p is positioned above the holder body H21, and the lower rotating arms H122 and H222 are held by the holding pad p. It rotates until it is located below the tool bodies H11 and H21. In other words, in the released state (k), the sandwiching members H12 and H22 are configured to rotate to a position that is equivalent to the front end surfaces H111 and H211 of the holder main bodies H11 and H21, or that is behind the front end surfaces H111 and H211. Has been.

  The holder driving mechanism 5 keeps both holders H1 and H2 in the released state (k) and puts them in the held state (h) for a required period each time the corresponding slide derivatives Y1 and Y2 reach the delivery position (u). The actuators incorporated in the first holder H1 and the actuators incorporated in the second holder H2 are actuated at a predetermined timing to be described later to hold the holders H1 and H2 (h ) Or released state (k).

  The required period in which the first holding tool H1 is in the holding state (h) is a period for pressing the surface of the long sheet S with the other slide derivative Y2. When one slide derivative Y1 corresponding to the holder H1 reaches the transfer position (u), the one slide derivative Y1 returns to the standby position (t), and then the other slide derivative Y2 is the second slide derivative Y2. This is the period up to the point of time when the delivery position (u) to the holder H2 is reached. In addition, the required period in which the second holding tool H2 is in the holding state (h) is a period for pressing the surface of the long sheet S with one slide derivative Y2. When the other slide derivative Y2 corresponding to the holder H2 reaches the delivery position (u), the other slide derivative Y2 returns to the standby position (t), and then the one slide derivative Y1 is the first slide derivative Y1. This refers to the period up to the point when the delivery position (u) to the holder H1 is reached.

  One slide derivative Y1 reciprocates between a standby position (t) set on the upper side of the second holder H2 and a delivery position (u) approaching the first holder H1. A derivative body Y11 having a shape, and a pressing roller Y12 for pressing the long sheet S, which is rotatably provided on the distal end side of the derivative body Y11 that approaches the first holding tool H1. The derivative main body Y11 includes an escape portion Y111 for preventing interference with the presser P1 described later.

  The other slide derivative Y2 reciprocates between a standby position (t) set on the upper side of the first holder H1 and a delivery position (u) approaching the second holder H2. A derivative main body Y21 having a shape, and a pressing roller Y22 for pressing the long sheet S, which is rotatably provided on the leading end side of the derivative main body Y21 that approaches the second holder H2. The derivative main body Y21 includes an escape portion Y211 for preventing interference with a presser P2 described later.

  The derivative guide mechanism 3 is configured such that the slide locus tr1 of one slide derivative Y1 is set obliquely and the slide locus tr2 of the other slide derivative Y2 is set substantially horizontal. That is, the derivative guide mechanism 3 includes an oblique guide portion 31 that defines the slide locus tr1 of one slide derivative Y1, and a horizontal guide portion 32 that defines the slide locus tr2 of the other slide derivative Y2.

  The oblique guide portion 31 includes a horizontal guide rail 311 that is disposed substantially horizontally, a horizontal slider 312 that is guided by the horizontal guide rail 311 and moves back and forth in the horizontal direction, and is held by the horizontal slider 312 so as to be movable up and down. Thus, an elevating member 313 that supports one slide derivative Y1 and an elevating mechanism 314 that elevates and lowers the elevating member 313 using the reciprocating motion of the horizontal slider 312 are provided. The elevating mechanism 314 includes a cam follower cf provided at the lower end portion of the elevating member 313 and an oblique guide rail L for guiding the cam follower cf. The oblique guide rail L is inclined so as to gradually become lower from the standby position (t) toward the delivery position (u), and the horizontal slider 312 moves from the standby position (t) to the delivery position (u). Accordingly, the elevating member 313 guided by the oblique guide rail L continues to descend. That is, one slide derivative Y1 supported by the elevating member 313 reaches the transfer position (u) while gradually lowering the altitude from the standby position (t). In this embodiment, the oblique guide portions 31 are arranged on both sides in the width direction of the long sheet S, and both end portions of one slide derivative Y1 are supported by the elevating members 313 of the both oblique guide portions 31. doing.

  The horizontal guide portion 32 includes a horizontal guide rail 321 arranged substantially horizontally, and a horizontal slider 322 that is guided by the horizontal guide rail 321 and moves back and forth in the horizontal direction. The end of the other slide derivative Y2 is supported. In this embodiment, the horizontal guide portions 32 are respectively arranged on both sides in the width direction of the long sheet S, and both end portions of the other slide derivative Y2 are supported by the horizontal sliders 322 of the both horizontal guide portions 32. doing. Both the slide derivatives Y1 and Y2 described above are reciprocated alternately from the standby position (t) to the delivery position (u) by the action of the slide derivative drive mechanism 4 while being guided by the derivative guide mechanism 3.

  The slide derivative drive mechanism 4 includes one drive unit 41 for driving one slide derivative Y1 and the other drive unit 42 for driving the other slide derivative Y2.

  One drive unit 41 has a timing belt 413 stretched between a drive pulley 411 and a driven pulley 412, and a specific part of the timing belt 413 is connected to the horizontal slider 312 of the oblique guide unit 31. The horizontal slider 312 of the oblique guide portion 31 is advanced and retracted along the horizontal guide rail 311 by driving 411 by a servo motor (not shown) or the like.

  The other drive unit 42 is a belt in which a timing belt 423 is stretched between a drive pulley 421 and a driven pulley 422, and a specific part of the timing belt 423 is connected to the horizontal slider 322 of the horizontal guide unit 32. The horizontal slider 322 of the horizontal guide portion 32 is advanced and retracted along the horizontal guide rail 321 by driving 421 by a servo motor (not shown) or the like.

  Further, the spell folding device D mounts the folded portion sf of the long sheet S that is released from the holding tools H1 and H2 when the holding tools H1 and H2 are switched from the holding state (h) to the released state (k). First and second pressers P1 and P2 for pressing in the direction of the table 6 are provided.

  The first presser P1 is arranged in a substantially horizontal position in the vicinity of the first holder H1, and uses the presser insertion part w12 in the window w1 of the partition wall w to project the upper projecting posture (i), the lower It can be actuated by a presser drive mechanism (not shown) so as to be able to assume four postures of a protruding posture (ii), a lower immersion posture (iii), and an upper immersion posture (iv). The upper protruding posture (i) is a position higher than the holder main body H11 of the first holder H1 in a state where the first presser P1 protrudes from the partition wall w on the first holder H1 side into the folding space sp. Refers to the posture held in The downward projecting posture (ii) is held at a position lower than the first holding tool H1 in a state where the first pressing tool P1 projects into the folding space sp from the partition wall w on the first holding tool H1 side. Refers to posture. The lower immersion position (iii) refers to an attitude in which the first pressing tool P1 is retracted horizontally from the lower protruding attitude (ii) and is immersed outward from the partition wall w on the first holding tool H1 side. The upper immersion position (iv) refers to an attitude in which the first presser P1 is translated from the lower immersion position (iii) directly above and held at the same height as the upper protruding attitude (i). The presser drive mechanism (not shown) is a combination of a vertical actuator (not shown) for moving the first presser P1 up and down and a front / rear actuator (not shown) for moving in the projecting and retracting direction, and has a normal configuration. Is omitted.

  The second pressing tool P2 is arranged in a substantially horizontal position in the vicinity of the second holding tool H2, and uses the pressing tool insertion portion w12 in the window w1 of the partition wall w to project upward (i), It can be actuated by a presser drive mechanism (not shown) so as to be able to assume four postures of a protruding posture (ii), a lower immersion posture (iii), and an upper immersion posture (iv). The upward projecting posture (i) is at a position higher than the holder body H21 of the second holder H2 in a state where the second presser P2 protrudes from the partition wall w on the second holder H2 side into the folding space sp. A posture that is held. The downward projecting posture (ii) is a posture in which the second pressing tool P2 is held at a position lower than the second holding tool H2 in a state where the second pressing tool P2 projects from the partition wall w on the second holding tool H2 side into the folding space sp. Say. The lower immersion position (iii) refers to an attitude in which the second pressing tool P2 is retracted horizontally from the lower protruding attitude (ii) and is immersed outward from the partition wall w on the second holder H2 side. The upper immersion position (iv) refers to an attitude in which the second presser P is translated from the lower immersion position (iii) directly above and held at the same height as the upper protruding attitude (i). The presser drive mechanism (not shown) is a combination of a vertical actuator (not shown) for moving the second presser P2 up and down and a front / rear actuator (not shown) for moving in the projecting and retracting direction, and has a normal configuration. Is omitted.

  The mounting table 6 is disposed at a position that forms the bottom of the zigzag folding space sp and is supported by the apparatus frame 1 so that it can move in the vertical direction. The mounting table 6 is configured to descend while maintaining the horizontal posture gradually corresponding to the progress speed of the folding of the long sheet S, and is used for raising and lowering the mounting table 6. Since the drive mechanism is a normal one, description and illustration are omitted.

  Next, the operation of the spell folding device D will be described with reference to the operation explanatory diagrams of FIGS. 3 to 7 and the timing chart of FIG. The spell folding device D is configured to make the operation from FIG. 3 to FIG. 7 as one cycle, and to repeat the cycle so as to spell the long sheet S.

  The long sheet S fed out from a production line (not shown) is supplied at a constant speed so as to hang downward by the action of the nip roll 21.

  FIG. 3 shows a state in the middle of the zigzag folding operation (see step 1 in FIG. 8). The first holder H1 is maintained in the released state (k) and released from the first holder H1. The folded portion sf of the long sheet S is pressed and held in the direction of the mounting table 6 by the first presser P1. The second holding tool H2 is in the holding state (h) and holds the folded portion sf located upstream, that is, above the folded portion sf. The second pressing tool P2 is held in the upward projecting posture (i). Both slide derivatives Y1, Y2 are each held at the standby position (t).

  From this state, one slide derivative Y1 moves from the standby position (t) to the delivery position (u). FIG. 4 shows a state in which one slide derivative Y1 is moving toward the delivery position (u) to the first holder H1 while pressing one surface of the long sheet S by the pressing roller Y12 (FIG. 4). 8 step 2). One slide derivative Y1 moves forward from the standby position (t) toward the delivery position (u) while gradually lowering the altitude by the action of the oblique guide portion 31. During the forward movement, the slide slide tr2 of the other slide derivative Y2 passes, but at this time, the other slide derivative Y2 is waiting at the standby position (t), so that interference between the slide derivatives Y1 and Y2 occurs. Absent.

  FIG. 5 shows a stage where one slide derivative Y1 has reached the delivery position (u) (see step 3 in FIG. 8). When one slide derivative Y1 reaches the delivery position (u), the first holder H1 is switched from the release state (k) to the hold state (h), and the long sheet S formed by the progress of the one slide derivative Y1. The folded portion sf is sandwiched. Note that the pressure roller Y12 of one slide derivative Y1 is provided intermittently while forming a certain gap s so as to form a grip for the long sheet S, and each first holding tool H1 is a pressure roller Y12. Thus, the grip margin portion of the long sheet S corresponding to the gap s where no sheet exists is sandwiched. A cutout Y112 is formed at a portion corresponding to the gap s in the derivative main body Y11. At the stage when the folded portion sf of the long sheet S is gripped by the first holder H1, one slide derivative Y1 moves backward and returns to the standby position (t) (see step 4 in FIG. 8). Further, while the one slide derivative Y1 returns to the standby position (t), the first presser P1 enters the lower immersion posture (iii) from the lower protruding posture (ii) and moves away from the long sheet S. Then, it returns to the upper protruding posture (i) through the upper immersion posture (iv). At this time, the second holding tool H2 is switched from the holding state (h) to the released state (k), and the second pressing tool P2 is lowered from the upper protruding position (i) to the lower protruding position (ii). The folded portion sf of the long sheet S released from the second holding tool H2 is pressed and held in the direction of the mounting table 6.

  Next, the other slide derivative Y2 moves from the standby position (t) toward the delivery position (u) to the second holder H2. FIG. 6 shows a state in which the other slide derivative Y2 is moving toward the delivery position (u) to the second holder H2 while pressing the other surface of the long sheet S by the pressing roller Y22 (FIG. 6). 8 step 5). The other slide derivative Y2 moves forward from the standby position (t) toward the transfer position (u) by the action of the horizontal guide portion 32. In the course of the forward movement, it passes through the slide trajectory tr1 of one slide derivative Y1, but at this time, one slide derivative Y1 is waiting at the standby position (t), so there is no interference between the slide derivatives Y1 and Y2. .

  FIG. 7 shows a stage where the other slide derivative Y2 has reached the delivery position (u) (see step 6 in FIG. 8). When the other slide derivative Y2 reaches the delivery position (u), the second holder H2 is switched from the released state (k) to the held state (h), and the long sheet formed by the progress of the other slide derivative Y2. The folded portion sf of S is sandwiched. Note that the pressure roller Y22 of the other slide derivative Y2 is provided intermittently while forming a certain gap s so as to form a grip for the long sheet S, and each second holding tool H2 is a pressure roller Y22. Thus, the grip margin portion of the long sheet S corresponding to the gap s where no sheet exists is sandwiched. In the derivative main body Y21, a notch Y212 is formed at a portion corresponding to the gap s. At the stage where the folded portion sf of the long sheet S is gripped by the second holder H2, the other slide derivative Y2 moves backward, returns to the standby position (t), and completes one cycle. In addition, while the other slide derivative Y2 returns to the standby position (t), the second pressing tool P2 is immersed in the lower immersion position (iii) from the lower protruding position (ii) and separated from the long sheet S. Then, it returns to the upper protruding posture (i) through the upper immersion posture (iv). At that time, the first holding tool H1 is switched from the holding state (h) to the opened state (k), and the first pressing tool P1 is lowered from the upper protruding posture (i) to the lower protruding posture (ii). The folded portion sk of the long sheet S released from the first holder H1 is pressed and held in the direction of the mounting table 6.

  By repeating the above cycle, the long sheet S is folded on the mounting table 6. The mounting table 6 descends at a required speed so that the uppermost surface of the zigzag fold is always kept at the same level as the elongate folding of the long sheet S proceeds.

  As described above, the zigzag folding device D for the long sheet S according to the present embodiment has the slide trajectories tr1 and tr2 from the standby positions (t) to the transfer positions (u) in the slide derivatives Y1 and Y2, respectively. Since the derivative guide mechanism 3 that guides both the slide derivatives Y1 and Y2 so as to cross each other is provided, the first and second holders H1 and H2 are made to correspond to the tracks of the slide derivatives Y1 and Y2. If this is arranged, the spelling and folding operation cycle can be repeated without moving these relative positions. In addition, the zigzag folding device D of the present embodiment is one slide derivative Y1 having a single configuration, although the first and second holders H1, H2 are supported by the device frame 1 and do not move up and down. By sliding the other slide derivative Y2 having a single configuration relative to each other, a series of zigzag folding can be performed while cooperating with the corresponding holders H1 and H2. For this reason, the zigzag folding device D of the present embodiment is capable of zigzag folding of the long sheet S efficiently and reliably while suppressing the complexity of the structure.

  Further, the zigzag folding apparatus D of the present embodiment is configured to place the folded portion sf of the long sheet S released from the holding tools H1 and H2 when the holding state (h) is switched to the released state (k) in the direction of the placing table 6. Since the first and second pressers P1 and P2 for pressing are provided, the folded portion sf of the long sheet S is appropriate even after the holders H1 and H2 release the folded portion sf. In this way, the state where the sheet is bent is continuously maintained, and the desired stacked state can be stably maintained even if the zigzag folds are sequentially advanced and stacked. In particular, since the long sheet S of the present embodiment is a bubble sheet, not only is it lightweight, but also the periphery of the folded portion sf causes elastic deformation in the anti-bending direction due to a plurality of bubbles. Therefore, the folded portion sf is suppressed by the first and second pressing tools P1 and P2, thereby greatly contributing to the stability of the zigzag folding.

  Since the derivative guide mechanism 3 sets the slide locus tr1 of one slide derivative Y1 obliquely and sets the slide locus tr2 of the other slide derivative Y2 substantially horizontally, the slide loci tr1 and tr2 intersect each other. The aspect can be realized with a relatively simple configuration. In particular, the zigzag folding device D shown in the present embodiment is such that the derivative guide mechanism 3 has a horizontal guide where the derivative guide mechanism 3 prescribes the slide locus tr1 of one slide derivative Y1 and the slide locus tr2 of the other slide derivative Y2. A horizontal guide rail 311 disposed substantially horizontally, a horizontal slider 312 guided by the horizontal guide rail 311 and moving back and forth in the horizontal direction, and the horizontal guide rail 311, An elevating member 313 that is supported by the slider 312 so as to be movable up and down and supports one slide derivative Y2 at its upper end, and an elevating mechanism 314 that elevates and lowers the elevating member 313 using the reciprocating motion of the horizontal slider 312 are provided. For this reason, various modes using the horizontal guide rail 311 and the reciprocating motion of the horizontal slider 312 can be selected as the lifting mechanism 314, and the degree of freedom in design is high.

  In the present embodiment, the elevating mechanism 314 is provided with a cam follower cf provided at the lower end of the elevating member 313 and an oblique guide rail L for guiding the cam follower cf. By setting the inclination angle of the oblique guide rail L, an accurate lifting stroke of the lifting member 313 can be set relatively easily.

  Since the slide derivatives Y1 and Y2 are provided so that the pressing roller Y is rotatably provided on the leading end side that presses the long sheet S, the one side and the other side of the long sheet S that is a lightweight resin sheet are pressed. The operation can be smoothly and reliably realized without causing a catch or the like.

  The first and second holders H1 and H2 include holder bodies H11 and H21, and a pair of sandwiching members H12 and H22 that are supported at the tips of the holder bodies H11 and H21 so as to be pivotable in the vertical direction. In the release state (k), the holding members H12 and H22 are configured to rotate to a position equivalent to the front end surfaces H111 and H211 of the holder main bodies H11 and H21 or to a position behind them so When the folded portion sf of the long sheet S is released by the tools H1 and H2, the folded portion sf does not interfere with the holding members H12 and H22 of the holding tools H1 and H2, and the folded portion sf is smoothly moved downward. You will be able to guide.

  The present invention is not limited to the embodiment described in detail above.

Here, FIG. 9, FIG. 10 and FIG. 11 are for explaining the manner in which the slide locus of one slide derivative and the slide locus of the other slide derivative intersect each other, and the configuration is simplified for convenience of explanation. Is shown. FIG. 9 shows the slide trajectories tr1 and tr2 of the one and other slide derivatives Y1 and Y2 according to the present embodiment. 10 and 11 show other examples of the slide trajectories tr1 and tr2 of the one and other slide derivatives Y1 and Y2 as reference examples . 10 and 11, the same or corresponding configurations as those of the above-described embodiment will be described with the same reference numerals, and description thereof will be omitted.

  FIG. 9 shows slide trajectories tr1 and tr2 according to the above-described embodiment. Specifically, the slide trajectory tr1 of one slide derivative Y1 is an oblique straight line, and the slide trajectory tr2 of the other slide derivative Y2 is a substantially horizontal straight line. The trajectories tr1 and tr2 intersect each other.

  FIG. 10 shows another example of the slide trajectories tr1 and tr2 of the one and other slide derivatives Y1 and Y2. Specifically, the slide trajectory tr1 of one slide derivative Y1 has an oblique straight line from the standby position (t) to the delivery position (u), and the slide trajectory tr2 of the other slide derivative Y2 is the standby position. From (t) to the delivery position (u), it is an oblique straight line symmetrical to the slide locus tr1 of one slide derivative Y1, and these slide loci tr1 and tr2 cross each other in the zigzag folding space sp. doing.

  FIG. 11 shows another example of the slide trajectories tr1 and tr2 of the one and other slide derivatives Y1 and Y2. Specifically, the slide trajectory tr1 of one slide derivative Y1 is refracted between the standby position (t) and the delivery position (u). That is, the slide trajectory tr1 of one slide derivative Y1 is an oblique straight line only in the middle part, and the front and rear parts thereof are substantially horizontal straight lines. On the other hand, the slide trajectory tr2 of the other slide derivative Y2 is a substantially horizontal straight line from the standby position (t) to the delivery position (u). Therefore, the slide loci tr1 and tr2 intersect each other in the spelling folding space sp. That is, the slide trajectories tr1 and tr2 do not have to extend straight from the standby position (t) to the delivery position (u), may be bent in the middle, or may be curved. May be.

  Various methods can be adopted as the mode of holding the long sheet by the holding tool, and the invention is not limited to the method of holding the long sheet by a pair of rotating arms as shown in the present embodiment. In other words, the holding tool may be anything as long as it can hold the bent portion of the long sheet at a predetermined timing. For example, only the lower arm of the upper and lower arms may be rotated so that the bent portion of the long sheet is held between the upper arm and the upper arm fixed in a horizontal posture. Alternatively, the bent portion of the long sheet may be held for a required time by using a suction device that sucks and holds the long sheet by sucking air.

  The long sheet is not limited to the bubble sheet as described in the present embodiment, and may be any sheet as long as it is a sheet.

  Various mechanisms can also be applied to each mechanism that exhibits a required function, and is not limited to those shown in the present embodiment. In the present embodiment, the lifting mechanism of the oblique guide portion constituting the derivative guide mechanism is provided with the cam follower and the oblique guide rail, but is not limited to this, for example, using hydraulic pressure The elevating member may be advanced and retracted, or the elevating member may be advanced and retracted using a gear mechanism using a rack and pinion or the like.

  Although the mounting table has been described as moving up and down in the present embodiment, the mounting table is not limited to this and may not be driven up and down.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 2 ... Sheet | seat supply mechanism 3 ... Derivative guide mechanism 4 ... Slide derivative drive mechanism 5 ... Holder drive mechanism 6 ... Mounting stand D ... Splash folding apparatus H1 ... Holder (first holder)
H2 ... Retainer (second retainer)
S ... long sheet (u) ... delivery position (t) ... standby position tr1 ... slide trajectory tr2 ... slide trajectory

Claims (6)

A long sheet zigzag folding device for zigzag folding long sheets alternately by folding,
A sheet supply mechanism that supplies the long sheet downward, a holding state that is disposed on both sides of the long sheet that is supplied by the sheet supply mechanism and holds the folded portion of the long sheet, and the folded portion The first and second holders that can be in a released state capable of receiving and releasing, and holding opposite to each other while forming a folded portion by waiting on the upper side of the first and second holders and pressing the long sheet A pair of slide derivatives that guide to the delivery position to the tool, and a derivative guide mechanism that guides both the slide derivatives so that the slide trajectory from each standby position to each delivery position in these slide derivatives cross each other, The slide derivative drive mechanism for alternately moving the both slide derivatives back and forth from the standby position to the delivery position and the both holders in the released state. Each time the corresponding slide derivative reaches the delivery position, the holder driving mechanism that keeps the holding state only for the required period, and the long sheet that is released from the first and second holders in a spelled state are supported. name and and a mounting table to is,
Wherein said derivative guiding mechanism, one slide derivatives long sheet serpentine device according to claim der Rukoto substantially those set horizontally sliding trajectory of the slide path along with set to obliquely other slide derivatives. 2. A first presser and a second presser for pressing the folded portion of the long sheet released from each holder when the holding state is switched to the released state in the mounting direction. The long sheet sheet spelling folding device. The derivative guide mechanism includes an oblique guide portion that defines a slide locus of one slide derivative, and a horizontal guide portion that defines a slide locus of the other slide derivative,
The oblique guide portion comprises a horizontal guide rails disposed substantially horizontally, the horizontal slider advancing and retracting in the horizontal direction while being guided by the horizontal guide rail, the hand with vertically movably held the upper end to the horizontal slider The long sheet sheet folding apparatus according to claim 1 or 2 , further comprising an elevating member that supports the slide derivative and an elevating mechanism that elevates and lowers the elevating member using a reciprocating motion of a horizontal slider. The long sheet folding device according to claim 3 , wherein the elevating mechanism includes a cam follower provided at a lower end portion of the elevating member and an oblique guide rail for guiding the cam follower. The long sheet zigzag folding apparatus according to claim 1, 2, 3, or 4, wherein the slide derivative is configured such that a pressing roller is rotatably provided on a leading end side for pressing the long sheet. The first and second holders are each provided with a holder body and a pair of clamping members that are supported at the tip of the holder body so as to be pivotable in the vertical direction. The long sheet according to claim 1, 2, 3, 4, or 5, wherein the holding member is configured to rotate to a position that is equivalent to the front end surface of the holder main body or to a position behind the front end surface. Splash folding device.

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