JP2018075653A - Feed roll moving device, knife cylinder, rotary die cutter, and carton former - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress damage caused by collision of feed rolls with a cutter mount in a feed roll moving device, a knife cylinder, a rotary die cutter and a carton former.SOLUTION: A feed roll moving device is provided with: movable members 101A and 101B disposed at outer peripheral part sides of feed rolls 48A and 48B; a movement mechanism 102 moving the movable members 101A and 101B in an axial direction of a knife cylinder 44; and connection release mechanisms 103A and 103B releasing coupling among the feed rolls 48A and 48B and the movable members 101A and 101B when a load exceeding a release load set beforehand in the axial direction of the knife cylinder 44 is applied to the feed rolls 48A and 48B while being capable of coupling the feed rolls 48A and 48B to the movable members 101A and 101B.SELECTED DRAWING: Figure 4

Description

  The present invention includes a feed roll moving device that moves a feed roll disposed on an outer peripheral portion of a knife cylinder, a knife cylinder used for cutting a sheet material, a rotary die cutter provided with the knife cylinder, and a rotary die cutter. It relates to a box making machine.

  A general box making machine manufactures a box (corrugated cardboard box) by processing a sheet material (for example, a corrugated cardboard sheet), and includes a paper feeding unit, a printing unit, a paper discharge unit, a die cut unit, and folding. (Folder gluer) and counter ejector. The paper feed unit feeds the corrugated cardboard sheets stacked on the table one by one and sends them to the printing unit at a constant speed. The printing unit has a printing unit and performs printing on a cardboard sheet. The paper discharge unit forms a ruled line that becomes a fold line on the printed cardboard sheet and processes a groove forming a flap and a bonding margin piece for joining. The die-cut portion is used for punching a corrugated cardboard sheet on which ruled lines, grooves, and glue margins are formed, such as hand holes. The folding part is applied by applying glue to the glue margin piece, folding it along the ruled line, and joining the glue margin piece while moving the corrugated cardboard sheet with ruled lines, grooves, glue margin pieces, hand holes, etc. A flat corrugated cardboard box is manufactured. The counter ejector unit stacks corrugated cardboard boxes in which corrugated sheets are folded and glued, sorts them into a predetermined number of batches, and discharges them.

  The above-described die cut part includes an anvil cylinder and a knife cylinder. The anvil cylinder and the knife cylinder are arranged above and below, the rotation axis is arranged along the horizontal direction, the shaft end is rotatably supported by the frame, and can be rotated in the opposite directions by the driving device. In the knife cylinder, a blade mounting base is detachable on the outer peripheral surface, and a punching blade is mounted on the blade mounting base. Further, the knife cylinder is provided with a feed roll on the outer peripheral surface so as to be movable in the axial direction, and can be moved by a moving device.

  Therefore, when carrying out the punching process, the operator attaches the blade mounting base to the outer peripheral surface of the knife cylinder. Then, when the corrugated cardboard sheet passes between the anvil cylinder and the knife cylinder, punching is performed. On the other hand, when punching is not performed, the operator removes the blade mount from the outer peripheral surface of the knife cylinder and moves the feed roll to an appropriate position according to the width of the corrugated cardboard sheet by the moving device. Then, the cardboard sheet is properly conveyed by the anvil cylinder and the feed roll.

  As such a die-cut part, there exists a thing described in the following patent document 1, for example.

JP 2008-155348 A

  By the way, the attaching / detaching operation of the blade mounting base with respect to the knife cylinder is performed by an operator according to the shape of the corrugated cardboard sheet to be manufactured. Therefore, even if the punching process is not carried out, if the tool mounting base is forgotten to be removed from the outer peripheral surface of the knife cylinder, when the feed roll is moved to a predetermined position by the moving device, the feed roll collides with the tool mounting base, There is a possibility that the moving device, the feed roll, etc. may be damaged.

  This invention solves the subject mentioned above, and aims at providing the feed roll moving apparatus, knife cylinder, rotary die cutter, and box making machine which suppress the damage by the collision with a feed roll and a cutter mounting base. .

  In order to achieve the above object, a feed roll moving device according to the present invention is a feed roll moving device that moves in the axial direction a ring-shaped feed roll mounted on the outer periphery of a knife cylinder. A moving member arranged on the outer peripheral side, a moving mechanism for moving the moving member along the axial direction of the knife cylinder, the feed roll and the moving member can be connected and the knife is connected to the feed roll A connection release mechanism for releasing the connection between the feed roll and the moving member when a load exceeding a preset release load along the axial direction of the cylinder is applied.

  Accordingly, the feed roll and the moving member are connected by the connection release mechanism, and when the moving member is moved along the axial direction of the knife cylinder by the moving mechanism, the feed roll connected to the moving member is moved along the axial direction of the knife cylinder. Can move. At this time, if the blade mounting base is attached to the outer peripheral portion of the knife cylinder, the feed roll abuts against the blade mounting base and presses, so that a load exceeding the release load along the axial direction of the knife cylinder is applied to the feed roll. Therefore, the connection between the feed roll and the moving member is released by the connection release mechanism. Therefore, it is possible to suppress excessive stress from acting on the feed roll or the like, and it is possible to suppress damage due to the collision between the feed roll and the blade mounting base.

  In the feed roll moving device of the present invention, the connection release mechanism can restrain the moving member by a predetermined restraining force set in advance, and the moving mechanism causes the feed roll to be moved through the moving member to the knife cylinder. When moving to the intermediate part side in the axial direction of the above, the load exceeding the release load acts on the feed roll, so that when the load exceeding the predetermined restraining force acts on the connection release mechanism, The moving member is separated.

  Therefore, when the blade mounting base is attached to the outer periphery of the knife cylinder, the feed roll abuts against and presses the blade mounting base, and if a load exceeding the release load acts on the feed roll, a predetermined restraint is applied to the connection release mechanism. A load exceeding the force acts, the moving member is detached from the feed roll, and the connection between the two is released, and the breakage of the feed roll and the movable member can be suppressed.

  In the feed roll moving device of the present invention, a support member that is movably supported along the axial direction of the knife cylinder, one end portion is fixed to the support member, and the other end portion is fed to the feed roll. A roll support member that is relatively movable in the circumferential direction of the roll and moves integrally in the axial direction is provided, and the connection release mechanism is provided between the support member and the moving member.

  Therefore, the roll support member is fixed and a movable support member is provided, and the connection release mechanism is provided between the support member and the movement member, so that the connection between the feed roll and the movement member is released. Even so, the feed roll can be properly supported by the support member.

  In the feed roll moving device according to the present invention, the connection release mechanism includes a hook rotatably supported by one of the support member and the moving member by a support shaft extending in a direction intersecting the axial direction of the knife cylinder. The hook includes an urging member that urges the hook in a direction to be locked to either the support member or the moving member.

  Therefore, by configuring the connection release mechanism with the hook and the biasing member, the support member and the moving member can be easily connected and released, and the apparatus can be simplified.

  In the feed roll moving device of the present invention, the hook locking portion or the other locked portion is provided with an inclined surface having a predetermined inclination angle with respect to the axial direction of the knife cylinder.

  Therefore, the hook can be smoothly locked and released by setting the locking portion or the locked portion as an inclined surface.

  In the feed roll moving device of the present invention, the urging member is a torsion spring, and an urging force adjusting mechanism for adjusting the urging force of the torsion spring is provided.

  Therefore, by providing a biasing force adjustment mechanism that adjusts the biasing force of the torsion spring as the biasing member, the release load of the connection release mechanism is adjusted to the optimum value by the biasing force adjustment mechanism according to the structure of the connection release mechanism. can do.

  In the feed roll moving device of the present invention, the moving mechanism has a screw shaft along the axial direction of the knife cylinder and a drive device that drives and rotates the screw shaft, and the moving member is screwed onto the screw shaft. In addition, the guide member is non-rotatable and is guided so as to be movable in the axial direction of the knife cylinder.

  Therefore, by providing a screw shaft that rotates as a moving mechanism, the structure can be simplified, and the moving member is screwed onto the screw shaft and cannot be rotated by the guide member. Can be moved properly.

  In the feed roll moving device of the present invention, two feed rolls are mounted on the outer periphery of the knife cylinder, and the moving mechanism moves the two feed rolls closer to and away from each other via the moving member and the connection release mechanism. It is characterized by moving to.

  Accordingly, the two feed rolls can be moved by the single moving mechanism via the moving member and the connection releasing mechanism, and the structure can be simplified and the cost can be reduced.

  The knife cylinder of the present invention is a cylinder body having a cylindrical shape for detachably mounting the blade mounting base, and a feed having a ring shape that is movably mounted along the axial direction on the outer periphery of the cylinder body. It comprises a roll and the feed roll moving device that moves the feed roll along an axial direction.

  Therefore, when the feed roll is moved along the axial direction by the feed roll moving device in a state where the cutter mount is attached to the outer peripheral portion of the cylinder body, the feed roll collides with the cutter mount. At this time, if the feed roll abuts against and presses the blade mount and a load exceeding the release load along the axial direction of the knife cylinder acts on the feed roll, the connection between the feed roll and the moving member is released by the connection release mechanism. The Therefore, it is possible to suppress excessive stress from acting on the feed roll or the like, and it is possible to suppress damage due to the collision between the feed roll and the blade mounting base.

  The rotary die cutter of the present invention includes an anvil cylinder that is rotatably supported by a frame, and the knife cylinder that is rotatably supported so as to face the lower side of the anvil cylinder in the frame. It is characterized by.

  Accordingly, the feed roll moving device is used when the cutter mounting base is attached to the outer peripheral portion of the cylinder body despite the punching process not being performed by the rotary die cutter, or the punching process is performed by the rotary die cutter. When the feed roll is moved along the axial direction, the feed roll collides with the blade mounting base. At this time, if the feed roll abuts against and presses the blade mount and a load exceeding the release load along the axial direction of the knife cylinder acts on the feed roll, the connection between the feed roll and the moving member is released by the connection release mechanism. The Therefore, it is possible to suppress excessive stress from acting on the feed roll or the like, and it is possible to suppress damage due to the collision between the feed roll and the blade mounting base.

  The box making machine of the present invention includes a paper feeding unit that supplies a corrugated cardboard sheet, a printing unit that performs printing on the corrugated cardboard sheet, and a paper discharge that performs ruled line processing and grooving on the printed cardboard sheet And the rotary die cutter for punching the corrugated cardboard sheet, the folding part for producing a flat corrugated cardboard box by folding the corrugated cardboard sheet along the ruled line, and the flat corrugated cardboard boxes stacked while counting And a counter ejector section that discharges every predetermined number later.

  Therefore, the cardboard sheet from the paper feeding unit is printed by the printing unit, the ruled line processing and grooving processing are performed by the paper discharge unit, the corrugated cardboard sheet is punched by the rotary die cutter, and the folding unit Are folded and joined to form a box body, and the counter ejector section counts and stacks the box bodies. At this time, even if the punching process is not performed by the rotary die cutter, the feed roll is moved when the cutter mounting base is attached to the outer peripheral portion of the cylinder body or the punching process is performed by the rotary die cutter. When the feed roll is moved along the axial direction by the apparatus, the feed roll collides with the blade mounting base. At this time, if the feed roll abuts against and presses the blade mount and a load exceeding the release load along the axial direction of the knife cylinder acts on the feed roll, the connection between the feed roll and the moving member is released by the connection release mechanism. The Therefore, it is possible to suppress excessive stress from acting on the feed roll or the like, and it is possible to suppress damage due to the collision between the feed roll and the blade mounting base.

  According to the feed roll moving device, the knife cylinder, the rotary die cutter and the box making machine of the present invention, the feed roll can be connected to the moving member, and when the load exceeding the release load is applied to the feed roll, Since the connection release mechanism for releasing the connection with the moving member is provided, it is possible to suppress excessive stress from acting on the feed roll and the like, and it is possible to suppress damage due to the collision between the feed roll and the blade mounting base.

FIG. 1 is a schematic configuration diagram illustrating a box making machine according to the present embodiment. FIG. 2 is a schematic diagram illustrating a die-cut portion of the present embodiment. FIG. 3 is a perspective view showing a knife cylinder. FIG. 4 is a front view illustrating the feed roll moving device of the present embodiment. FIG. 5 is a side view showing the feed roll moving device. FIG. 6 is a front view illustrating a connection release mechanism in the feed roll moving device. FIG. 7 is a plan view illustrating a connection release mechanism in the feed roll moving device. FIG. 8 is a right side view illustrating a connection release mechanism in the feed roll moving device. FIG. 9 is a schematic diagram illustrating the operation of the connection release mechanism in the feed roll moving device. FIG. 10 is a front view illustrating a modification of the connection release mechanism in the feed roll moving device of the present embodiment.

  Exemplary embodiments of a feed roll moving device, a knife cylinder, a rotary die cutter, and a box making machine according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, and when there are two or more embodiments, what comprises combining each embodiment is also included.

  FIG. 1 is a schematic configuration diagram illustrating a box making machine according to the present embodiment.

  In this embodiment, as shown in FIG. 1, the box making machine 10 manufactures a cardboard box (box body) B by processing a cardboard sheet S. The box making machine 10 includes a paper feeding unit 11, a printing unit 21, a paper discharge unit 31, a die cut unit 41, and a speed increasing unit that are arranged in a straight line in a conveyance direction D for conveying the cardboard sheet S and the cardboard box B. 51, a folding unit 61, and a counter ejector unit 71.

  The paper feeding unit 11 feeds the cardboard sheets S one by one and sends them to the printing unit 21 at a constant speed. The sheet feeding unit 11 includes a table 12, a front pad 13, a supply roller 14, a suction device 15, and a feed roll 16. The table 12 can be mounted by stacking a large number of cardboard sheets S and is supported so as to be lifted and lowered. The front pad 13 can position the front end position of the cardboard sheets S stacked on the table 12, and a gap through which one cardboard sheet S can pass is secured between the lower end portion and the table 12. . A plurality of supply rollers 14 are arranged in the conveying direction D of the corrugated cardboard sheet S corresponding to the table 12, and when the table 12 descends, the supply roller 14 is at the lowest position among the stacked corrugated cardboard sheets S. The cardboard sheet S can be sent forward. The suction device 15 sucks the stacked cardboard sheets S downward, that is, toward the table 12 or the supply roller 14 side. The feed roll 16 can supply the cardboard sheet S sent out by the supply roller 14 to the printing unit 21.

  The printing unit 21 performs multicolor printing (in this embodiment, four color printing) on the surface of the cardboard sheet S. In the printing unit 21, four printing units 21A, 21B, 21C, and 21D are arranged in series, and printing can be performed on the surface of the cardboard sheet S using four ink colors. Each printing unit 21A, 21B, 21C, 21D is configured in substantially the same manner, and has a printing cylinder 22, an ink supply roll (anilox roll) 23, an ink chamber 24, and a receiving roll 25. A printing cylinder 22 is attached to the outer periphery of the printing cylinder 22 and is rotatably provided. The ink supply roll 23 is disposed so as to be in contact with the printing plate 26 in the vicinity of the printing cylinder 22 and is rotatably provided. The ink chamber 24 stores ink and is provided in the vicinity of the ink supply roll 23. The receiving roll 25 conveys the corrugated cardboard sheet S with the printing cylinder 22 while applying a predetermined printing pressure, and is provided rotatably below the printing cylinder 22. Yes.

  The paper discharge unit 31 applies a ruled line process, a cutting process, a grooving process, and a glue piece process to the corrugated cardboard sheet S by a slotter device. The paper discharge unit 31 includes a first ruled line roll 32, a second ruled line roll 33, a first slotter head 34, a second slotter head 35, and a slitter head 36. The first ruled line roll 32 and the second ruled line roll 33 perform ruled line processing on the back surface (lower surface) of the cardboard sheet S. The first slotter head 34 and the second slotter head 35 perform grooving processing at a predetermined position in the corrugated cardboard sheet S and paste margin processing. The slitter head 36 is provided adjacent to the second slotter head 35 and cuts the end portion in the width direction of the cardboard sheet S.

  The die cut portion 41 is for punching the corrugated cardboard sheet S such as a hand hole. The die cut portion 41 has a pair of upper and lower feed rolls 42, an anvil cylinder 43 and a knife cylinder 44. The feed roll 42 nips and conveys the cardboard sheet S from above and below, and is rotatably provided. The anvil cylinder 43 and the knife cylinder 44 are each formed in a circular shape and can be rotated in synchronization with a driving device (not shown). The anvil cylinder 43 has an anvil formed on the outer peripheral portion, while the knife cylinder 44 has a head and a die formed at predetermined positions on the outer peripheral portion.

  The speed increasing portion 51 increases the speed of the cut corrugated cardboard sheet S, thereby ensuring a predetermined transport interval between the corrugated cardboard sheets S being transported. The speed increasing portion 51 has a pair of upper and lower conveying belts 52 and 53. The conveyor belts 52 and 53 convey the corrugated cardboard sheet S from above and below, and can be rotated in synchronization with a driving device (not shown). The conveyance speed of the cardboard sheet S in the speed increasing portion 51 is set to a speed higher than the conveyance speed of the cardboard sheet S up to the die cut portion 41.

  The folding unit 61 folds the cardboard sheet S while moving it in the transport direction D, and joins both ends in the width direction to form a flat cardboard box B. The folding unit 61 includes an upper conveyance belt 62, lower conveyance belts 63 and 64, and a sheet folding device (folder gluer) 65. The upper conveyor belt 62 and the lower conveyor belts 63 and 64 convey the corrugated cardboard sheet S and the corrugated cardboard box B from above and below. As will be described later, the sheet folding device 65 folds each end portion in the width direction of the cardboard sheet S while folding it downward. The folding unit 61 is provided with a gluing device 66. The gluing device 66 has a glue gun, and can paste at a predetermined position on the cardboard sheet S by discharging the glue at a predetermined timing.

  The counter ejector unit 71 stacks the cardboard boxes B while counting them, sorts them into a predetermined number of batches, and then discharges them. The counter ejector unit 71 has a hopper device 72. The hopper device 72 has a liftable elevator 73 on which the cardboard boxes B are stacked. The elevator 73 is provided with a front contact plate and a rectifying plate. A carry-out conveyor 74 is provided below the hopper device 72.

  Here, the operation | movement which manufactures the cardboard box B from the cardboard sheet | seat S in the box making machine 10 of this embodiment mentioned above is demonstrated. The box making machine 10 according to the present embodiment performs printing, ruled line processing, groove and paste margin processing, and punching processing on the corrugated cardboard sheet S, and then folds to manufacture the corrugated cardboard box B.

  The corrugated cardboard sheet S is formed by gluing a corrugated core between a front liner and a back liner. In the corrugated cardboard sheet S, two fold lines are formed in the previous process of the box making machine 10. This folding line is for folding the flap when the cardboard box B manufactured by the box making machine 10 is assembled later. Such corrugated cardboard sheets S are stacked on the table 12 of the paper feeding unit 11 as shown in FIG.

  A large number of cardboard sheets S stacked on the table 12 in the paper feeding unit 11 are first positioned by the front pad 13 and then lowered by the plurality of supply rollers 14 as the table 12 descends. The cardboard sheet S in the lower position is sent out. Then, the cardboard sheet S is supplied to the printing unit 21 at a predetermined constant speed by the pair of feed rolls 16.

  In the printing unit 21, in each of the printing units 21A, 21B, 21C, and 21D, ink is supplied to the surface of the ink supply roll 23 from the ink chamber 24. When the printing cylinder 22 and the ink supply roll 23 are rotated, ink supply is performed. The ink on the surface of the roll 23 is transferred to the printing plate 26. When the cardboard sheet S is conveyed between the printing cylinder 22 and the receiving roll 25, the cardboard sheet S is sandwiched between the printing plate 26 and the receiving roll 25, and printing pressure is applied to the cardboard sheet S. Thus, the surface is printed. The printed cardboard sheet S is conveyed to the paper discharge unit 31 by a feed roll.

  First, when the cardboard sheet S passes through the first ruled line roll 32 in the paper discharge unit 31, a ruled line is formed on the back surface (back liner) side of the cardboard sheet S. Further, when the cardboard sheet S passes through the second ruled line roll 33, the ruled line is re-formed on the back surface (back liner) side of the cardboard sheet S.

  Next, when the cardboard sheet S on which the ruled line is formed passes through the first and second slotter heads 34 and 35, a groove is formed at the position of the ruled line. At this time, a margin piece is formed by cutting the end portion at the position of the ruled line. Further, when the cardboard sheet S passes through the slitter head 36, the end portion is cut at the cutting position. Therefore, the corrugated cardboard sheet S is composed of four sheet pieces with a ruled line (groove) as a boundary.

  In the die cut part 41, when the corrugated cardboard sheet S passes between the anvil cylinder 43 and the knife cylinder 44, a hand hole or the like is formed. However, punching such as a hand hole is appropriately performed according to the type of the corrugated cardboard sheet S, and when a hand hole or the like is unnecessary, a blade mounting base (punching blade) for performing this punching is a knife. The cardboard sheet S is removed from the cylinder 44 and passes between the rotating anvil cylinder 43 and the knife cylinder 44. Then, the corrugated cardboard sheet S in which a hand hole or the like is formed is conveyed to the speed increasing unit 51.

  In the speed increasing portion 51, the cardboard sheet S is conveyed while being sandwiched between the upper and lower conveying belts 52 and 53. At this time, the corrugated cardboard sheet S is conveyed at a conveyance speed increased from the conveyance speed of the die cutting unit 41, so that a predetermined conveyance interval is formed between the corrugated cardboard sheets S. Thereafter, the cardboard sheet S is conveyed to the folding unit 61. The speed increasing unit 51 may not be provided. In this case, the cardboard sheet S is conveyed from the die cut part 41 to the folding part 61.

  In the folding unit 61, the corrugated cardboard sheet S is moved in the conveying direction D by the upper conveying belt 62 and the lower conveying belts 63 and 64, and after the glue is applied to the glue margin piece by the gluing device 66, the sheet is folded. The device 65 is folded downward with the ruled line as a base point. When this folding proceeds to nearly 180 degrees, the folding force becomes strong, the glue piece and the end of the cardboard sheet S are pressed and brought into close contact with each other, and the both ends of the cardboard sheet S are joined to form a cardboard box B. Then, the cardboard box B is conveyed to the counter ejector unit 71.

  In the counter ejector portion 71, the cardboard box B is sent to the hopper device 72, and the tip end portion in the transport direction D hits the front contact plate and is stacked on the elevator 73 in a state of being shaped by the rectifying plate. When a predetermined number of cardboard boxes B are stacked on the elevator 73, the elevator 73 descends, and the predetermined number of cardboard boxes B are discharged as one batch by the carry-out conveyor 74, and the post-process of the box making machine 10 Sent to.

  Here, first, the die cut part (rotary die cutter) 41 of the present embodiment will be described in detail. FIG. 2 is a schematic view showing a die-cut portion of the present embodiment, and FIG. 3 is a perspective view showing a knife cylinder.

  As shown in FIG. 2, in the die-cut portion 41, the frame 40 is erected on the floor surface FL, and an anvil cylinder 43 and a knife cylinder 44 are vertically arranged inside. The anvil cylinder 43 and the knife cylinder 44 are arranged so that their rotational axes are horizontal and parallel to each other, their respective ends in the axial direction are rotatably supported by the frame 40, and are opposite to each other by a drive device (not shown). It can be driven and rotated. A pair of feed rolls 42 are arranged above and below the upstream side in the conveyance direction D of the cardboard sheet S from the anvil cylinder 43 and the knife cylinder 44.

  As shown in FIGS. 2 and 3, the knife cylinder 44 is constituted by a cylinder body 44a having a columnar shape, and a blade mounting base 45 is provided on the outer peripheral surface of the cylinder body 44a. A cutting knife (blade) 46 is attached to the blade mounting base 45, and is detachably attached to the outer peripheral surface of the cylinder body 44a by a plurality of fixing devices 47. The cutting knife 46 can punch the corrugated cardboard sheet S. The knife cylinder 44 is provided with two feed rolls 48 (48A, 48B) on the outer peripheral surface so as to be movable in the axial direction. The feed rolls 48 (48A, 48B) are disposed on the respective shaft end sides of the knife cylinder 44, and can be moved in the axial direction by a feed roll moving device described later.

  Therefore, when the punching process is performed on the corrugated cardboard sheet S, the operator mounts the blade mounting base 45 on the outer peripheral surface of the knife cylinder 44. Then, the anvil cylinder 43 and the knife cylinder 44 are driven to rotate, and when the corrugated cardboard sheet S passes between the anvil cylinder 43 and the knife cylinder 44, a punching process is performed by the cutting knife 46 of the blade mounting base 45. On the other hand, when the punching process is not performed on the corrugated cardboard sheet S, the operator removes the blade mounting base 45 from the outer peripheral surface of the knife cylinder 44 and positions the feed rolls 48A and 48B in accordance with the width of the corrugated cardboard sheet S. Move to. Then, the anvil cylinder 43 and the knife cylinder 44 are driven and rotated, and the corrugated cardboard sheet S is appropriately conveyed by the anvil cylinder 43 and the feed rolls 48A and 48B without being punched.

  Next, the feed roll moving device of this embodiment will be described. FIG. 4 is a front view showing the feed roll moving device of this embodiment, and FIG. 5 is a side view showing the feed roll moving device.

  As shown in FIGS. 4 and 5, the feed roll moving device 100 moves two feed rolls 48 (48 </ b> A and 48 </ b> B) having a ring shape attached to the outer peripheral portion of the knife cylinder 44 along the axial direction. Is.

  The knife cylinder 44 can be driven and rotated by a driving device 49, and a blade mounting base 45 is detachably provided on an outer peripheral surface of an intermediate portion in the axial direction. The knife cylinder 44 is provided with feed rolls 48A and 48B on the outer peripheral surface of each end in the axial direction. Each of the feed rolls 48A and 48B is rotated integrally with the knife cylinder 44 in the circumferential direction by fitting the key grooves 48Aa and 48Ba into the key 44b formed along the axial direction on the outer peripheral surface of the cylinder body 44a. In the axial direction, it is supported so as to be movable relative to the knife cylinder 44. The feed rolls 48 </ b> A and 48 </ b> B can be moved in the axial direction by the feed roll moving device 100.

  The feed roll moving device 100 includes a moving member 101 (101A, 101B), a moving mechanism 102, and a connection release mechanism 103 (103A, 103B). Each moving member 101A, 101B and each connection release mechanism 103A, 103B are provided corresponding to each feed roll 48A, 48B. The moving mechanism 102 can move the feed rollers 48A and 48B so as to approach and separate from each other via the connection release mechanisms 103A and 103B by moving the moving members 101A and 101B so as to approach and separate from each other. it can.

  The moving mechanism 102 includes a screw shaft 111 along the axial direction of the knife cylinder 44 and a driving device 112 that drives and rotates the screw shaft 111. As with the knife cylinder 44, the screw shaft 111 is rotatably supported at the end of each shaft by the frame 40 (see FIG. 2). The driving device 112 is attached to the frame 40 and can drive and rotate the screw shaft 111 in the forward rotation direction and the reverse rotation direction.

  Each moving member 101A, 101B is disposed on the outer peripheral side of the feed rolls 48A, 48B, and is screwed into the screw shaft 111. In this case, the screw shaft 111 is a reverse screw at a position where the moving member 101A is screwed and a position where the moving member 101B is screwed. Therefore, when the driving device 112 is driven, the screw shaft 111 is driven and rotated, and the moving members 101A and 101B can move so as to approach and separate from each other. Each of the connection release mechanisms 103A and 103B can connect each of the feed rolls 48A and 48B and each of the moving members 101A and 101B, and is set to a preset release along the axial direction of the knife cylinder 44 to each of the feed rolls 48A and 48B. When a load exceeding the load is applied, the connection between each feed roll 48A, 48B and each moving member 101A, 101B can be released.

  That is, when the blade mounting base 45 is mounted on the knife cylinder 44, the feed rolls 48A and 48B are moved to the blade mounting base 45 when the feed rolls 48A and 48B are moved toward each other by the feed roll moving device 100. Collision causes excessive stress to act on the moving members 101A and 101B, the connection release mechanisms 103A and 103B, and the feed rolls 48A and 48B, which are deformed or damaged. Therefore, when the moving mechanism 102 moves the feed rolls 48A and 48B to the intermediate portion side in the axial direction of the knife cylinder 44 via the moving members 101A and 101B, the connection release mechanisms 103A and 103B are connected to the feed rolls 48A. , 48B collide with the blade mounting base 45, and when the resistance force (load) to the movement of each feed roll 48A, 48B exceeds the release load, each feed roll 48A, 48B and each moving member 101A, 101B The feed rolls 48A and 48B are stopped at that position, and only the moving members 101A and 101B are moved.

  Here, the feed roll moving device 100 will be described in detail. Since each of the moving members 101A and 101B and each of the connection release mechanisms 103A and 103B are symmetrical and have substantially the same configuration, one moving member 101A is provided. Only the connection release mechanism 103A will be described, and members having similar functions in the other moving member 101B and connection release mechanism 103B will be assigned the same reference numerals and description thereof will be omitted. 6 is a front view showing a connection release mechanism in the feed roll moving device, FIG. 7 is a plan view showing the connection release mechanism in the feed roll moving device, and FIG. 8 is a right side view showing the connection release mechanism in the feed roll moving device. FIG.

  As shown in FIGS. 4 to 8, the support member 121 is configured by mounting a support arm 123 on a support frame 122 and integrally connecting with a plurality of bolts 124. The support arm 123 has a semi-ring shape, and a connecting piece (roll support member) 125 is fixed to each tip portion by a bolt 126. One end of the connecting piece 125 is fixed to the support arm 123 by a bolt 126, and the other end is fitted in a fitting groove 48Ab provided in an annular shape along the circumferential direction on the outer peripheral surface of the feed roll 48A. Therefore, the feed roll 48A is rotatable relative to the support member 121 (connecting piece 125) in the circumferential direction, and can move integrally in the axial direction.

  The support frame 122 is provided with a horizontal hole 127 along the horizontal direction, and the screw shaft 111 is inserted into the horizontal hole 127. Further, the guided member 128 is fixed to the lower portion of the support frame 122 with bolts 129. The guided member 128 is formed with a fitting groove 130 along the axial direction of the screw shaft 111 in the lower surface portion. On the other hand, a support beam 131 is disposed below the screw shaft 111, and each end of the support beam 131 in the longitudinal direction is fixed to the frame 40 (see FIG. 2). A guide rail (guide member) 132 is fixed to the upper surface of the support beam 131, and the fitting groove 130 of the guided member 128 in the support frame 122 is fitted to the guide rail 132. Therefore, the support member 121 is supported by the guide rail 132 so that it cannot rotate and is movable along the axial direction of the screw shaft 111 (knife cylinder 44).

  The moving member 101 </ b> A includes a nut 141 and a moving body 142. The nut 141 is screwed onto the screw shaft 111. The moving body 142 passes through the screw shaft 111 and is fitted to the outside of the nut 141, and is fixed to the flange portion 143 of the nut 141 with a plurality of bolts 144. Further, the movable body 142 has a flat guided surface 142a formed at the lower portion, and is opposed to the guide surface 132a provided at the upper portion of the guide rail 132 with a predetermined gap. Therefore, the moving member 101A is supported non-rotatably by the guide rail 132, and is movable along the axial direction of the screw shaft 111 (knife cylinder 44) by the rotation of the screw shaft 111.

  The support member 121 and the moving member 101A are adjacent to each other along the axial direction of the screw shaft 111, and the moving member 101A is positioned on the middle side in the longitudinal direction of the screw shaft 111, that is, on the side where the blade mounting base 45 is mounted. doing.

  The connection release mechanism 103 </ b> A is provided between the support member 121 and the moving member 101 </ b> A, and includes a hook 151 and a torsion coil spring (biasing member) 152. In the support frame 122, a pair of support walls 153 are erected at an upper portion adjacent to the support arm 123 at a predetermined interval, and are fixed by bolts 154. The hook 151 is formed by integrally forming a main body portion 155, a pair of support portions 156, and a hook portion 157, the main body portion 155 is disposed between the pair of support walls 153, and the pair of support portions 156 is a support shaft. 158 is rotatably supported. The support shaft 158 passes through the pair of support walls 153 and the pair of support portions 156 along the horizontal direction intersecting the axial direction of the screw shaft 111 (knife cylinder 44), and is prevented from being detached by the locking pieces 159. .

  The torsion coil spring 152 has a spiral shape in which both sides pivot in the same direction with respect to the intermediate locking portion 161, and is disposed around the support shaft 158. In the torsion coil spring 152, the intermediate locking portion 161 is locked to the locking pin 162 of the support shaft 158, and each end portion 163 is locked to the pair of support portions 156 of the hook 151. The support shaft 158 has a flange portion 164 fixed to the outside of one support wall 153, and an adjustment bolt 165 passes through one of the plurality of through holes 166 formed in the flange portion 164 to support the support wall 153. 153 is screwed.

  The hook 151 is provided with a hook portion 157 that is bent from the main body portion 155 toward the screw shaft 111, and a first cam surface (locking portion) 171 is formed at the tip of the hook portion 157. On the other hand, the moving member 101 </ b> A has a second cam surface (locked portion) 172 formed on the hook 151 side of the moving body 142. In addition, the hook portion 157 has a first flank 173 formed at the tip portion on the opposite side of the first cam surface 171, and the moving body 142 has a second flank surface 174 on the opposite side of the second cam surface 172 at the upper end portion. Is formed. Therefore, the hook portion 157 has a triangular tip, and the moving body 142 has a triangular upper end. The first cam surface 171 and the second cam surface 172 are inclined surfaces having a predetermined inclination angle with respect to a horizontal plane along the axial direction of the screw shaft 111 (knife cylinder 44), and are substantially parallel to each other. In this case, the inclination angle of the first cam surface 171 and the second cam surface 172 may be an angle larger than 0 degree and smaller than 90 degrees, preferably 30 degrees to 60 degrees, and most preferably 45 degrees. However, it is not necessary to provide the first cam surface 171 and the second cam surface 172 on both the hook portion 157 and the moving body 142, and they may be provided on either one.

  Therefore, the hook 151 is configured such that the first cam surface 171 of the hook portion 157 is engaged with the second cam surface 172 of the moving body 142 by the urging force of the torsion coil spring 152, so that the moving body 142 and the hook 151, The moving member 101A and the connection release mechanism 103A are integrally connected. That is, the moving body 142 is pulled by the hook 151 to the end side (left side in FIG. 6) of the screw shaft 111 and comes into contact with the support member 121, so that the intermediate portion side (FIG. 6) of the screw shaft 111 is obtained. The movement to the right side) is prevented, and both are integrally connected. The hook 151 and the torsion coil spring 152 are covered with a cover 181.

  The hook 151 restrains the moving body 142 to the support member 121 with a predetermined restraining force based on the biasing force of the torsion coil spring 152. This restraining force can be adjusted by an urging force adjusting mechanism. Here, the urging force adjustment mechanism includes a support shaft 158, a flange portion 164, and an adjustment bolt 165. That is, after the adjustment bolt 165 is removed and the support shaft 158 is rotated forward (right rotation in FIG. 6), the torsion coil spring 152 moves the intermediate locking portion 161 in the same direction by the locking pin 162. This increases the power. On the other hand, when the support shaft 158 is rotated in the reverse direction (left rotation in FIG. 6), the urging force of the torsion coil spring 152 is reduced by the intermediate locking portion 161 being moved in the same direction by the locking pin 162. The support shaft 158 is rotated, the support shaft 158 is stopped at a position where the biasing force of the torsion coil spring 152 becomes a predetermined value (release load), and the adjustment bolt 165 is formed in one through hole 166 formed in the flange portion 164. And the urging force of the torsion coil spring 152 is adjusted to an appropriate value (predetermined restraining force).

  As described above, when the feed roll 48A and the moving member 101A are in the connected state, the connection release mechanism 103A connects the feed roll 48A and the moving member 101A when a load exceeding the release load is applied to the feed roll 48A. To release. That is, when the blade mounting base 45 is mounted on the knife cylinder 44, when the moving member 101A moves and the feed roll 48A collides with the blade mounting base 45, the connection release mechanism 103A causes the moving member 101A and the feed roll 48A to move. It is necessary to release the connection between the feed roll 48A and the moving member 101A before the deformation or breakage occurs. Therefore, the release load is a load that activates the connection release mechanism 103A before the moving member 101A, the feed roll 48A, and the like are deformed when the feed roll 48A collides with the blade mounting base 45.

  Specifically, the hook 151 of the connection release mechanism 103 </ b> A restrains the moving member 101 </ b> A to the support member 121 with a predetermined restraining force by the biasing force of the torsion coil spring 152. When the feed roll 48A collides with the blade mount 45 and stops, the support member 121 also stops and only the moving member 101A tries to move. Here, when a load exceeding a predetermined restraining force is applied to the hook 151 by the movement of the moving member 101A, the hook 151 rotates against the urging force of the torsion coil spring 152, and the moving member 101 is moved from the supporting member 121. 101A is disengaged, and the connection between the feed roll 48A and the moving member 101A is released.

  Therefore, a predetermined restraining force of the hook 151 by the urging force of the torsion coil spring 152 is set according to the release load acting on the feed roll 48A. That is, the biasing force of the torsion coil spring 152 is set so that the hook 151 rotates and the moving member 101A is detached from the support member 121 when a release load is applied to the feed roll 48A. However, foreign matters such as paper dust may adhere to the guide rail 132 and the like, and the movement resistance of the support member 121 may increase. At this time, the connection release mechanism 103A is activated, that is, the hook 151 is twisted and the coil spring is turned. It is not preferable to rotate against the urging force of 152. Therefore, the release load (restraint force) is such that the connection release mechanism 103A operates even if foreign matter adheres to the guide rail 132 or the like and the movement resistance of the support member 121 increases, that is, the hook 151 twists and the coil spring 152 It is desirable to set the load so as not to rotate against the urging force.

  Hereinafter, the operation of the feed roll moving device 100 of the present embodiment will be described. FIG. 9 is a schematic diagram illustrating the operation of the connection release mechanism in the feed roll moving device.

  As shown in FIGS. 4 and 5, when the die cut part 41 does not punch the corrugated cardboard sheet S, the operator removes the blade mounting base 45 from the outer peripheral surface of the knife cylinder 44 and moves the feed roll. The apparatus 100 moves the feed rolls 48 </ b> A and 48 </ b> B to appropriate positions according to the width of the cardboard sheet S. However, even if the punching process is not performed on the cardboard sheet S, the operator forgets to remove the blade mounting base 45 from the knife cylinder 44 or the punching process is performed on the cardboard sheet S. Regardless, when the operator moves the feed rolls 48A, 48B by the feed roll moving device 100, the feed rolls 48A, 48B collide with the blade mounting base 45.

  That is, when the screw shaft 111 is driven and rotated in one direction by the driving device 112, the moving members 101 </ b> A and 101 </ b> B move in a direction in which the moving members 101 </ b> A and 101 </ b> B approach and separate from each other via the nuts 141 screwed to the screw shaft 111. Then, the support members 121 connected to the moving members 101A and 101B via the hooks 151 of the connection release mechanisms 103A and 103B also move in the same direction and are supported via the connection pieces 125 of the support members 121. The feed rolls 48A and 48B move in directions approaching each other. When the feed rolls 48 </ b> A and 48 </ b> B move by a predetermined distance, the forward end surfaces of the feed rolls 48 </ b> A and 48 </ b> B come into contact with the end face of the blade mount 45.

  At this time, as shown in FIG. 9, since the feed roll 48A is in contact with the blade mount 45, the feed roll 48A cannot advance any further. On the other hand, since the driving force is transmitted from the driving device 112 via the screw shaft 111, the moving member 101A tries to advance further. Then, the force to move forward by the moving member 101A acts as a load on the feed roll 48A via the connection release mechanism 103A, and further presses the blade mounting base 45.

  Here, the hook 151 restrains the moving member 101 </ b> A to the support member 121 by the first cam surface 171 being locked to the second cam surface 172 of the moving body 142 by the biasing force of the torsion coil spring 152. Yes. When the load acting on the feed roll 48A exceeds the release load, a force exceeding the restraining force of the hook 151 acts on the hook 151 from the moving member 101A. Then, as shown in FIG. 9, the second cam surface 172 of the moving body 142 pushes up the hook 151 via the first cam surface 171 by the forward force of the moving member 101 </ b> A, and the hook 151 is twisted by the torsion coil spring 152. It rotates against the power. When the hook 151 rotates by a predetermined angle, the moving member 101A moves away from the hook 151 and advances, and the connection between the moving member 101A and the hook 151, that is, the moving member 101A and the feed roll 48A is released. Thereafter, the feed roll 48A stops at a position in contact with the blade mounting base 45, and deformation and breakage of the support member 121 and the connecting piece 125 are prevented. On the other hand, the moving member 101A moves forward as it is, but when detected by a detection switch (not shown), the driving of the driving device 112 is stopped and the moving member 101A stops. Further, the moving member 101B and the connection release mechanism 103B operate similarly.

  If the connection between the moving member 101A and the feed roll 48A is released, then the connection between the moving member 101A and the feed roll 48A needs to be restored. In this case, the hook 151 is twisted and rotated against the urging force of the coil spring 152 using a dedicated jig, and the moving body 142 of the moving member 101A is brought into close contact with the support member 121 in this state, and the hook 151 And the moving body 142 may be restrained by the biasing force of the torsion coil spring 152.

  In the above-described embodiment, the hook 151 and the torsion coil spring (biasing member) 152 are applied as the connection release mechanism 103A. However, the present invention is not limited to this configuration. FIG. 10 is a front view illustrating a modification of the connection release mechanism in the feed roll moving device of the present embodiment.

  As shown in FIG. 10, the feed roll moving device 200 includes a moving member 201, a moving mechanism 102, and a connection release mechanism 203. The moving mechanism 102 includes a screw shaft 111 and a driving device 112 (see FIG. 4). The moving member 201 is screwed onto the screw shaft 111. The connection release mechanism 203 can connect the feed roll 48A and the moving member 201, and connects the feed roll 48A and the moving member 201 when a load exceeding a preset release load is applied to the feed roll 48A. It can be canceled.

  The support member 211 is configured by mounting a support arm 213 on a support frame 212 and integrally connecting with a plurality of bolts 214. In the support arm 213, the connecting piece 125 is fixed to the tip end by a bolt 126, and the connecting piece 125 is fitted in the fitting groove 48Ab of the feed roll 48A. The support frame 212 is provided with a horizontal hole 127, and the screw shaft 111 is inserted into the horizontal hole 127. The support frame 212 has a guided member 128 fitted to the guide rail 132 fixed to the lower portion thereof.

  The moving member 201 includes a nut 221, and the nut 221 is screwed to the screw shaft 111. The nut 221 is provided with a flange portion 222 and faces the guide surface 132a of the guide rail 132 with a predetermined gap. Therefore, the moving member 201 is supported non-rotatably by the guide rail 132 and is movable along the axial direction of the screw shaft 111 by the rotation of the screw shaft 111.

  The connection release mechanism 203 is provided between the support member 211 and the moving member 201 and includes magnets 231 and 232. The support frame 212 has a magnet 231 fixed to one end in the moving direction. On the other hand, the moving member 201 has a magnet 232 fixed to the flange portion 222 of the nut 221. The magnets 231 and 232 are fixed to the mutually opposing surfaces of the support member 211 and the moving member 201 and can be attracted to each other. In this case, a magnet may be provided on one of the support member 211 and the moving member 201, and an attracting body such as iron may be provided on the other side. The connection release mechanism is not limited to a magnet, and may be a magic tape (registered trademark) or an adsorbent.

  Therefore, the magnets 231 and 232 are attracted to each other, so that the support member 211 and the moving member 201 are integrally connected. The magnets 231 and 232 restrain the moving member 201 to the support member 212 with a predetermined restraining force based on the attraction force. Therefore, when the feed roll 48A and the moving member 201 are in a connected state, the connection release mechanism 203 releases the connection between the feed roll 48A and the moving member 201 when a load exceeding the release load is applied to the feed roll 48A. . The release load is a load that causes the connection release mechanism 203 to operate before the moving member 201, the feed roll 48A, and the like are deformed when the feed roll 48A collides with the blade mounting base 45.

  More specifically, the magnets 231 and 232 of the connection release mechanism 203 restrain the moving member 201 to the support member 211 with a predetermined restraining force by an attractive force. When the feed roll 48A collides with the blade mount 45 and stops, the support member 211 also stops and only the moving member 201 tries to move. Here, when a load exceeding a predetermined restraining force (attraction force) is applied to the magnets 231 and 232 due to the movement of the moving member 201, the magnets 231 and 232 are separated against the attraction force, and the moving member is separated from the support member 211. 201 is released, and the connection between the feed roll 48A and the moving member 201 is released. Therefore, a predetermined restraining force by the attractive force of the magnets 231 and 232 is set according to the release load that acts on the feed roll 48A.

  As described above, in the feed roll moving device of the present embodiment, the moving members 101A and 101B and the moving members 101A and 101B arranged on the outer peripheral side of the feed rolls 48A and 48B are moved along the axial direction of the knife cylinder 44. The moving mechanism 102, the feed rolls 48A and 48B, and the moving members 101A and 101B can be connected to each other, and the feed rolls 48A and 48B receive a load exceeding a preset release load along the axial direction of the knife cylinder 44. Connection release mechanisms 103A and 103B are provided to release the connection between the feed rolls 48A and 48B and the moving members 101A and 101B when they act.

  Therefore, when the blade mounting base 45 is attached to the outer peripheral portion of the knife cylinder 44, the feed rolls 48A and 48B abut against and press the blade mounting base 45, so that the shaft of the knife cylinder 44 is brought into contact with the feed rolls 48A and 48B. A load along the direction acts. When this load exceeds the release load, the connection between the feed rollers 48A and 48B and the moving members 101A and 101B is released by the connection release mechanisms 103A and 103B. Therefore, it is possible to suppress excessive stress from acting on the feed rolls 48A and 48B, and to prevent damage to the support member 121 and the connecting piece 125 due to the collision between the feed rolls 48A and 48B and the blade mounting base 45. .

  In the feed roll moving device of this embodiment, the connection release mechanisms 103A and 103B can restrain the moving members 101A and 101B with a predetermined restraining force set in advance, and the moving mechanism 102 passes the moving members 101A and 101B. When the feed rolls 48A and 48B are moved to the intermediate portion side in the axial direction of the knife cylinder 44, a load exceeding the release load acts on the feed rolls 48A and 48B, so that a predetermined restraining force is applied to the connection release mechanisms 103A and 103B. When an excessive load is applied, the moving members 101A and 101B are detached from the feed rolls 48A and 48B. Therefore, when a load exceeding the release load acts on the feed rolls 48A and 48B, a load exceeding a predetermined restraining force acts on the connection release mechanisms 103A and 103B, and the moving members 101A and 101B are detached from the feed rolls 48A and 48B. Both connection will be cancelled | released and damage to the support member 121, the connection piece 125, etc. can be suppressed.

  In the feed roll moving device of this embodiment, the support member 121 is supported so as to be movable along the axial direction of the knife cylinder 44, one end is fixed to the support member 121, and the other end is attached to the feed rolls 48A and 48B. On the other hand, a connection piece 125 that is relatively movable in the circumferential direction and integrally moves in the axial direction is provided, and connection release mechanisms 103A and 103B are provided between the support member 121 and the movement members 101A and 101B. Therefore, even after the connection between the feed rolls 48A and 48B and the moving members 101A and 101B is released, the feed rolls 48A and 48B can be properly supported by the support member 121.

  In the feed roll moving device according to the present embodiment, as the connection release mechanisms 103A and 103B, a hook 151 that is rotatably supported by a support shaft 158 along a direction intersecting the axial direction of the knife cylinder 44 on the support member 121, and the hook 151. Is provided with a torsion coil spring 152 that urges the moving members 101A and 101B in a locking direction. Therefore, it is possible to easily connect and release the support member 121 and the moving members 101A and 101B, and to simplify the apparatus.

  In the feed roll moving device of this embodiment, the first cam surface 171 and the second cam that have a predetermined inclination angle with respect to the axial direction of the knife cylinder 44 at the locking portion of the hook 151 and the locked portion of the moving body 142. A surface 172 is provided. Therefore, the hook 151 can be smoothly locked and released.

  In the feed roll moving device of this embodiment, an urging force adjusting mechanism that adjusts the urging force of the torsion coil spring 152 is provided. Therefore, the release load of the connection release mechanism can be adjusted to the optimum value by the biasing force adjustment mechanism according to the structure of the connection release mechanisms 103A and 103B.

  In the feed roll moving device of this embodiment, a screw shaft 111 along the axial direction of the knife cylinder 44 and a drive device 112 that drives and rotates the screw shaft 111 are provided as the moving mechanism 102, and the moving members 101A and 101B are screw shafts. 111 and is guided by the guide rail 132 so as not to rotate and to be movable in the axial direction of the knife cylinder 44. Therefore, by providing the screw shaft 111 that is driven and rotated as the moving mechanism 102, the structure can be simplified, and the moving members 101A and 101B are screwed into the screw shaft 111 and cannot be rotated by the guide rail 132. Thus, the moving members 101A and 101B can be appropriately moved by the screw shaft 111.

  In the feed roll moving device of this embodiment, two feed rolls 48A and 48B are mounted on the outer periphery of the knife cylinder 44, and two moving mechanisms 102 are provided via the moving members 101A and 101B and the connection releasing mechanisms 103A and 103B. The feed rolls 48A and 48B are moved toward and away from each other. Accordingly, the two feed rolls 48A and 48B can be moved by the single moving mechanism 102 via the moving members 101A and 101B and the connection releasing mechanisms 103A and 103B, thereby simplifying the structure and reducing the cost. Can do.

  Further, in the knife cylinder of the present embodiment, a cylinder body 44a having a columnar shape for detachably mounting the blade mounting base 45, and a ring shape moving in the axial direction to the outer periphery of the cylinder body 44a. Feed rolls 48A and 48B that are freely mounted, and a feed roll moving device 100 that moves the feed rolls 48A and 48B along the axial direction are provided. Accordingly, when the feed rolls 48A and 48B are moved along the axial direction by the feed roll moving device 100 in a state where the cutter mounting base 45 is attached to the outer peripheral portion of the cylinder body 44a, the feed rolls 48A and 48B are moved to the cutter mounting base. Collide with 45. At this time, when the feed rolls 48A and 48B press the blade mounting base 45 and a load exceeding the release load along the axial direction of the knife cylinder 44 is applied to the feed rolls 48A and 48B, the connection release mechanisms 103A and 103B cause the feed roll 48A. , 48B and the moving members 101A, 101B are disconnected. Therefore, it is possible to suppress excessive stress from acting on the feed rolls 48A, 48B and the like, and it is possible to suppress damage to the support member 121, the connecting piece 125, and the like.

  In the rotary die cutter according to the present embodiment, the anvil cylinder 43 is supported by the frame 40 so as to be driven to rotate, and the knife cylinder is supported by the frame 40 so as to be driven to rotate so as to face the lower side of the anvil cylinder 43. 44. Accordingly, when the cutter mounting base 45 is attached to the outer peripheral portion of the cylinder main body 44a although the punching process is not performed by the die cut part 41, or the punching process is performed by the die cut part 41, the feed roll is used. When the feed rolls 48 </ b> A and 48 </ b> B are moved along the axial direction by the moving device 100, the feed rolls 48 </ b> A and 48 </ b> B collide with the blade mounting base 45. At this time, when the feed rolls 48A and 48B press the blade mounting base 45 and a load exceeding the release load along the axial direction of the knife cylinder 44 is applied to the feed rolls 48A and 48B, the connection release mechanisms 103A and 103B cause the feed roll 48A. , 48B and the moving members 101A, 101B are disconnected. Therefore, it is possible to suppress excessive stress from acting on the feed rolls 48A, 48B and the like, and it is possible to suppress damage to the support member 121, the connecting piece 125, and the like.

  In the box making machine of the present embodiment, the paper feeding unit 11, the printing unit 21, the paper discharging unit 31, the die cut unit 41, the speed increasing unit 51, the folding unit 61, and the counter ejector unit 71 are provided. The feed roll moving device 100 is provided in the knife cylinder 44 of the die cut part 41. Accordingly, printing is performed on the corrugated cardboard sheet S from the paper feeding unit 11 by the printing unit 21, ruled line processing and grooving processing are performed by the paper discharge unit 31, and folding is performed by the folding unit 61 to join the ends. The cardboard boxes B are formed, and the cardboard boxes B are stacked while being counted by the counter ejector unit 71. At this time, it is possible to suppress excessive stress from acting on the feed rolls 48 </ b> A, 48 </ b> B and the like at the die cut portion 41, and damage to the support member 121 and the connecting piece 125 can be suppressed.

  In the above-described embodiment, the connecting piece 125 is fixed to the support member 121 and the hook 151 is provided so that the hook 151 is locked to the moving member 101. However, the present invention is not limited to this configuration. . For example, a hook is provided on the moving member 101 so that the hook is locked to the support member 121, or a hook is provided on one of the support member 121 and the connection piece 125 between the support member 121 and the connection piece 125. It may be provided and configured.

  In the above-described embodiment, the urging member is the torsion coil spring 152. However, an elastic member such as a compression coil spring, a tension coil spring, a leaf spring, resin, or rubber may be used.

  In the above-described embodiment, the box making machine 10 includes the paper feeding unit 11, the printing unit 21, the paper discharge unit 31, the die cut unit 41, the speed increasing unit 51, the folding unit 61, and the counter ejector unit 71. It is not limited to this configuration. The box making machine 10 may be configured by only the paper feeding unit 11, the die cutting unit 41, and the folding unit 61.

DESCRIPTION OF SYMBOLS 11 Paper feed part 21 Printing part 31 Paper discharge part 41 Die cut part 42 Feed roll 43 Anvil cylinder 44 Knife cylinder 45 Cutting tool mount 48, 48A, 48B Feed roll 49 Driving device 51 Speed increasing part 61 Folding part 65 Sheet folding apparatus 71 Counter ejector section 100, 200 Feed roll moving device 101, 101A, 101B, 201 Moving member 102 Moving mechanism 103, 103A, 103B, 203 Disengagement mechanism 111 Screw shaft 112 Drive device 121, 211 Support member 122, 212 Support frame 123, 213 Support arm 125 Connection piece (roll support member)
128 Guided member 131 Support beam 132 Guide rail (guide member)
141, 221 Nut 142 Moving body 151 Hook 152 Torsion coil spring (biasing member)
155 Main unit 156 Support unit 157 Hook unit 158 Support shaft (biasing force adjusting mechanism)
164 Flange (Biasing force adjustment mechanism)
165 Adjustment bolt (Biasing force adjustment mechanism)
171 First cam surface (locking portion, inclined surface)
172 Second cam surface (locked part, inclined surface)
173 1st flank 174 2nd flank 231 232 Magnet D Transport direction S Corrugated cardboard sheet B Corrugated cardboard box

Claims (11)

In the feed roll moving device that moves the feed roll having a ring shape attached to the outer peripheral portion of the knife cylinder along the axial direction,
A moving member disposed on the outer peripheral side of the feed roll;
A moving mechanism for moving the moving member along the axial direction of the knife cylinder;
The feed roll and the moving member can be connected to each other when a load exceeding a preset release load along the axial direction of the knife cylinder is applied to the feed roll. A connection release mechanism for releasing
A feed roll moving device comprising:   The decoupling mechanism can restrain the moving member with a predetermined restraining force set in advance, and the feed mechanism moves the feed roll to the intermediate portion side in the axial direction of the knife cylinder via the moving member. When the load exceeding the release load is applied to the feed roll, the moving member is detached from the feed roll when the load exceeding the binding force is applied to the connection release mechanism. The feed roll moving device according to claim 1.   A support member supported movably along the axial direction of the knife cylinder, one end portion is fixed to the support member, and the other end portion is movable relative to the feed roll in the circumferential direction of the feed roll. 3. A feed according to claim 1, further comprising a roll support member that moves integrally in the axial direction, and wherein the connection release mechanism is provided between the support member and the moving member. Roll moving device.   The connection release mechanism includes a hook that is rotatably supported by one of the support member and the moving member by a support shaft that extends in a direction intersecting the axial direction of the knife cylinder, and the hook is connected to the support member and the The feed roll moving device according to claim 3, further comprising an urging member that urges the moving member in a direction of being engaged with either one of the moving members.   The feed roll moving device according to claim 4, wherein an inclined surface having a predetermined inclination angle with respect to an axial direction of the knife cylinder is provided at the hook locking portion or the other locked portion. .   6. The feed roll moving device according to claim 4, wherein the urging member is a torsion spring, and an urging force adjusting mechanism for adjusting an urging force of the torsion spring is provided. .   The moving mechanism has a screw shaft along the axial direction of the knife cylinder and a driving device that drives and rotates the screw shaft, and the moving member is screwed to the screw shaft and cannot be rotated by a guide member. The feed roll moving device according to any one of claims 1 to 6, wherein the feed roll moving device is guided so as to be movable in an axial direction of the knife cylinder.   Two feed rolls are mounted on the outer periphery of the knife cylinder, and the moving mechanism moves the two feed rolls so as to approach and separate from each other via the moving member and the connection release mechanism. The feed roll moving device according to any one of claims 1 to 7. A cylinder body having a cylindrical shape for detachably mounting the blade mounting base;
A feed roll having a ring shape and attached to the outer periphery of the cylinder body so as to be movable along the axial direction;
The feed roll moving device according to any one of claims 1 to 8, wherein the feed roll is moved along the axial direction.
A knife cylinder comprising: An anvil cylinder that is rotatably supported by the frame;
The knife cylinder according to claim 9, wherein the knife cylinder is supported so as to be capable of driving and rotating so as to face a lower side of the anvil cylinder in the frame.
A rotary die cutter comprising: A paper feeding unit for supplying cardboard sheets;
A printing section for printing on a cardboard sheet;
A paper discharge unit that performs ruled line processing and grooving processing on a printed cardboard sheet,
The rotary die cutter according to claim 10, wherein the corrugated cardboard sheet is punched.
A folding part for producing a flat cardboard box by folding a cardboard sheet along a ruled line;
A counter ejector section that discharges the flat cardboard boxes every predetermined number after being piled up while counting;
A box making machine comprising:

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