Sheet cutting device and sheet cutting method

Abstract

To reduce a work load by man power without utility such as electric power and air or the like, and secure a work space in non-use time.SOLUTION: A sheet cutting device 1 comprises: a supply part 10 supporting a roll-shaped sheet; and a cutting part 30 for cutting the sheet. The cutting part 30 has: a cutter unit 34 including a cutter blade and a cutter blade holding part for holding the cutter blade; a shaft 32 for supporting the cutter unit in a slidable state in an axial direction and rotatable state around the axis; and a guide rail 33 separated from the shaft, having a groove in the axial direction, and supported so as to rotate around the axis of the shaft 32. When sliding the cutter unit 34 in the axial direction, the cutter blade is inserted into the groove of the guide rail 33, in the state, the cutter blade makes parallel translation and can cut the sheet on the guide rail 33 in a width direction, and in non use, in a state in which the cutter unit 34 is held between the shaft 32 and the guide rail 33, the cutter unit can be rotated around the axis of the shaft 32 and is retreated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an apparatus for unwinding a rolled sheet by a predetermined length and cutting it in the width direction. [Background technology]

[0002] In the field of printing processes, a long printed matter on which a roll of sheet is continuously and repeatedly printed is once wound up into a roll, and then the printed matter is cut out as samples at predetermined intervals to check the print quality, etc. The work of cutting out a portion from the roll of sheet has been performed, for example, manually by an operator moving a safety cutter held by the operator in the width direction of the sheet. The width of such sheets can be as large as more than 2 m, and the work of unwinding the leading edge of a wide sheet from a roll and cutting it with a cutter held by an operator is a heavy workload and poses health and safety issues, such as the risk of injury from the cutter blade.

[0003] Meanwhile, Patent Document 1 describes a cutting device that cuts a sheet to be cut, which may be unwound from a roll, wound into a roll, or in a web form. This cutting device has a guide rail and a cutting unit, and the cutting unit has a sliding means that can slide between one end and the other end along the guide rail, and a cutter section that cuts the sheet to be cut. The sliding means has a standby position on one end side of the guide rail, and has a standby position return mechanism that automatically moves the cutting unit to the standby position regardless of the position along the guide rail.

[0004] Patent document 2 describes a cutting device for a paper or film packaging machine, characterized in that a slide plate housing a cutter can slide alternately left and right along a rail on a base via a pulley transmission mechanism in response to a command from a control device via a microswitch operated by operating a start switch, and the rotation speed of the rotating roller can be appropriately adjusted by pressing the support plate with an adjustment screw, thereby enabling the paper or film to be automatically cut. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-65998 [Patent Document 2] JP 2000-72118 A Summary of the Invention [Problem to be solved by the invention]

[0006] The above-mentioned sampling work of printed matter is often carried out in the empty space of a warehouse or factory, and utilities such as power and air may not be sufficiently secured. Therefore, when using a device that automatically cuts sheets or films using power such as a motor, there are problems such as restrictions on the installation space, high device costs, and costs for motor maintenance. In addition, there is a possibility that the device may not function satisfactorily when needed due to a breakdown or the like.

[0007] On the other hand, the above-mentioned sampling work of printed matter is not necessarily performed all the time; there may be times when it is necessary to perform other work in that location depending on the time of day, but moving the entire sheet cutting device each time is inconvenient and reduces workability.

[0008] The present disclosure has been made in consideration of such circumstances, and has an objective of providing a sheet cutting device and a sheet cutting method that can reduce the manual workload even without utilities such as electricity or air, and that makes it easy to secure a working space when not in use. [Means for solving the problem]

[0009] The sheet cutting device according to this embodiment comprises a supply section that rotatably supports a roll-shaped sheet, and a cutting section that cuts the sheet along the width direction, and the cutting section comprises a cutter unit including a cutter blade and a cutter blade holding section that holds the cutter blade, a shaft that supports the cutter unit so that it can slide in the axial direction and rotate about its axis, and a guide rail that is spaced a predetermined distance from the shaft, has a groove along its axial direction, and is supported rotatably about the axis of the shaft, and when the cutter unit is slid along the axial direction of the shaft, the cutter blade moves parallel to the guide rail while inserted into the groove, thereby cutting the sheet placed on the guide rail in the width direction, and when the cutter unit is not in use, the cutter unit can be retracted by rotating the cutter unit and the guide rail about the axis of the shaft while the cutter unit is sandwiched between the shaft and the guide rail.

[0010] In the sheet cutting device according to another embodiment of the present invention, a tension generating section may be attached to one end of the cutter unit so that the cutter unit automatically returns to its initial position when not in use.

[0011] In addition, in a sheet cutting device according to another embodiment of the present invention, the cutter blade holding portion may further include a protrusion portion inclined at an acute angle toward the shaft side relative to the guide rail, and the cutter blade positioned between the protrusion portion and the guide rail may be visible.

[0012] In addition, in a sheet cutting device according to another embodiment of the present invention, a locking mechanism may be further provided that locks the cutter unit and the guide rail when the cutter unit and the guide rail are rotated about the axis of the shaft and retracted.

[0013] In addition, a sheet cutting device according to another embodiment of the present invention includes a sheet positioning step of positioning a roll-shaped sheet so that it can be rotated freely, a feeding step of feeding out the sheet, and a cutting step of cutting the sheet along the width direction, in which the cutting step involves sliding a cutter unit along the axial direction of a shaft, and moving the cutter unit parallel to a guide rail that is spaced a predetermined distance from the shaft and has a groove along the axial direction with a cutter blade of the cutter unit inserted into the groove of the guide rail, thereby cutting the sheet placed on the guide rail in the width direction, and further including a retracting step of retracting the cutter unit and the guide rail about the axis of the shaft while the cutter unit is still sandwiched between the shaft and the guide rail when the cutter unit is not in use. Effect of the Invention

[0014] According to this embodiment, it is possible to provide a sheet cutting device and a sheet cutting method that can reduce the manual workload even without utilities such as electricity or air, and that makes it easy to secure work space when not in use. [Brief description of the drawings]

[0015] [Figure 1] 1 is a schematic perspective view illustrating an example of a sheet cutting device according to an embodiment of the present disclosure. [Diagram 2] FIG. 4 is a front view illustrating the sheet cutting device as viewed from the +X direction. [Diagram 3] 11 is a side view illustrating the sheet cutting device as viewed from the +Y direction. FIG. [Figure 4] 10A to 10C are diagrams illustrating the configuration of a cutter unit according to an embodiment and a modified example. [Diagram 5] FIG. 4 is a flow diagram illustrating an example of a sheet cutting method according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an example of a sheet cutting device and a sheet cutting method according to the present disclosure will be described with reference to the drawings, etc. However, the sheet cutting device and the sheet cutting method according to the present disclosure are not limited to the device and the method according to the embodiment described below.

[0017] The figures shown below are schematic. Therefore, the size, shape, thickness of each layer in the cross-sectional view, etc. are appropriately exaggerated to facilitate understanding. In addition, hatching showing the cross section of the member is appropriately omitted in each figure. The numerical values ​​of the dimensions and material names of each member described in this specification are examples of embodiments, and are not limited to these and can be appropriately selected and used. In this specification, terms that specify the shape or geometric conditions, such as parallel, orthogonal, and vertical, are intended to include substantially the same state in addition to their strict meaning. In addition, for convenience of explanation, the terms "upper" or "lower" may be used in the description relative to the paper, but the up-down direction may be reversed, and the same applies to the left-right direction.

[0018] 1. Embodiments of the present disclosure A typical embodiment of the sheet cutting device of the present disclosure will be described. Here, for convenience of describing the sheet cutting device 1, an XYZ coordinate system is provided. In the sheet cutting device 1, a Y axis is provided along the axial direction of the target roll 200, and a Z axis is provided along the vertical direction. In addition, an X axis perpendicular to the Y axis and the Z axis is provided. With respect to the X axis, the direction in which the target sheet 210 is conveyed from the back side to the front side is the +X direction side, and the opposite direction is the -X direction side. Also, when the +X direction is viewed to the right, the direction toward the front side is the -Y direction side, the opposite direction is the +Y direction side, the vertical upward direction is the +Z direction side, and the vertical downward direction is the -Z direction side.

[0019] As an example, the sheet cutting device 1 is a device that cuts a printed material, which is a long sheet wound into a roll and on which repeated printing is continuously performed, in the width direction at the required locations while appropriately unwinding the printed material. The object is not limited to a printed sheet, but may be a sheet or film in general that is given some design or functionality. Such a sheet is wound as a roll 200. As shown in Figs. 1, 2, 3(a) and 3(b), both ends of the roll 200 in the axial direction are rotatably supported from below by a supply unit 10 composed of a pair of shaft support frames 11. Therefore, the sheet 210 can be easily unwound from the roll 200 by simply pulling the tip of the sheet 210 by hand.

[0020] The sheet cutting device 1 also includes a cutting unit 30 that is disposed above the supply unit 10 and cuts the unwound sheet 210 in the width direction. The sheet 210 unwound from the roll 200 by the supply unit 10 is redirected from an upward direction to a horizontal direction by a guide unit 20 including a guide roller 22, and is then conveyed to the cutting unit 30.

[0021] The cutting section 30 includes a cutter unit 34 including a cutter blade 34d and a cutter blade holder 34c that holds the cutter blade 34d. The cutting section 30 also includes a movable shaft 32 that supports the cutter unit 34 slidably in the axial direction and rotatably about the axis, and a guide rail 33 that is provided at a predetermined distance from the movable shaft 32 and has a groove along the axial direction.

[0022] In the sheet cutting device 1, when the cutter unit 34 is slid along the axial direction of the moving shaft 32, the cutter blade 34d moves parallel to the guide rail 33 while being inserted into the groove 33a of the guide rail 33, thereby cutting the sheet 210 placed on the guide rail 33 in the width direction. When the cutter unit 34 is not in use, the cutter unit 34 and the guide rail 33 can be rotated about the axis of the moving shaft 32 to retract the cutter unit 34 while the cutter unit 34 is sandwiched between the moving shaft 32 and the guide rail 33.

[0023] The sheet cutting device 1 of this embodiment has the above-mentioned configuration, so that even in an environment without utilities such as electricity or air, manual sheet cutting work can be easily performed, and the workload can be reduced. In addition, when not in use, the cutter unit 34 and guide rail 33 can be retracted by rotating them around the axis of the moving shaft 32. Therefore, when performing another task, it is easy to secure a working space without incurring the workload of moving the entire device. The configuration of each part of the sheet cutting device 1 will be described in detail below.

[0024] [a] Configuration of sheet cutting device [i] Supply section As shown in Figures 1, 2, 3(a) and 3(b), the supply unit 10 is composed of a pair of shaft support frames 11 that rotatably support, from below, both ends of a cylindrical roll shaft 12 that is fitted along the axis of the target roll 200. The shaft support frames 11 are composed of a first shaft support frame 11a that supports the end of the roll shaft 12 on the -Y direction side, and a second shaft support frame 11b that supports the end of the roll shaft 12 on the +Y direction side. However, the supply unit 10 is not limited to one that supports the roll 200 from below, and may have a structure that rotatably chucks both ends of the roll shaft 12 from the side.

[0025] The roll 200 fixed to the supply unit 10 in this manner has a roll shaft 12 which is freely rotatable, so that the sheet 210 can be easily pulled out by pulling it by hand.

[0026] [ii] Guide section As shown in FIG. 1, FIG. 2, FIG. 3(a) and FIG. 3(b), the sheet cutting device 1 includes a guide roller 22 arranged above the supply unit 10 so as to be axially substantially parallel to the roll 200, and a guide unit 20 including a pair of guide roller support frames 21 that rotatably support both ends of the guide roller 22. The guide roller support frame 21 includes a first guide roller support frame 21a that supports the end of the guide roller 22 on the -Y direction side, and a second guide roller support frame 21b that supports the end of the guide roller 22 on the +Y direction side. The guide unit 20 has a role of changing the conveying direction of the sheet 210 unwound from the roll 200. However, the guide unit 20 may not be provided in the sheet cutting device 1. The guide unit 20 may also be provided with a plurality of guide rollers. By providing guide rollers as appropriate, the conveying of the sheet 210 can be stabilized and the sheet cutting device 1 can be made space-saving.

[0027] [iii] Cutting section As shown in Fig. 1, Fig. 2, Fig. 3(a) and Fig. 3(b), a cutting section 30 that cuts the sheet 210 along the width direction, i.e., along the Y-axis direction, is disposed above the supply section 10 of the sheet cutting device 1 and downstream of the guide roller 22 of the guide section 20 in the conveyance of the sheet 210, i.e., on the +X-direction side of the guide roller 22. The cutting section 30 includes a cutter unit 34 including a cutter blade 34d and a cutter blade holder 34c that holds the cutter blade 34d. The cutting section 30 also includes a moving shaft 32 that supports the cutter unit 34 slidably in the axial direction and rotatably around the axis, and a guide rail 33 that is provided at a predetermined interval from the moving shaft 32 and has a groove 33a provided along the axial direction.

[0028] Both ends of the moving shaft 32 are fixedly supported by a pair of moving shaft support frames 31. The moving shaft support frame 31 is composed of a first moving shaft support frame 31a that supports the end of the moving shaft 32 on the -Y direction side, and a second moving shaft support frame 31b that supports the end of the moving shaft 32 on the +Y direction side.

[0029] The axis of the movable shaft 32 is a straight line m substantially parallel to the Y-axis. The cutter unit 34 has a ring-shaped mounting portion 34a at one end with a through hole through which the movable shaft 32 passes. The cutter unit 34 also has a cutter blade 34d and a cutter blade holder 34c that holds the cutter blade 34d at the other end, and a cylindrical or prismatic extension portion 34b that integrally fixes the mounting portion 34a and the cutter blade holder 34c. The extension portion 34b also has a gripping portion 34e that allows the cutter unit 34 to be gripped and easily slid.

[0030] Furthermore, a guide rail 33 is provided below the moving shaft 32, spaced a predetermined distance from the moving shaft 32. The guide rail 33 has a continuous groove 33a along the Y axis, which is its axial direction, at approximately the center along the X axis, which is its width direction. In this embodiment, the guide rail 33 is made by arranging two rectangular prism members in parallel and fixing them so that a certain gap is provided between them. However, the present invention is not limited to this, and a continuous groove may be formed in the center of a single rectangular prism member by end milling or the like, or the rectangular prism member may be molded into the above shape by extrusion molding or the like.

[0031] The guide rail 33 is provided below the movable shaft 32 at a predetermined distance so as to be approximately parallel to the movable shaft 32. At this time, the cutter blade 34d disposed at the lower end of the cutter unit 34 is inserted into the groove 33a of the guide rail 33. In other words, the extension portion 34b and the cutter blade holding portion 34c of the cutter unit 34 are disposed above the guide rail 33, and only the cutter blade 34d is configured to be below the upper surface of the guide rail 33, i.e., to enter inside the groove 33a.

[0032] Further, the guide rail 33 is fixed at its end on the +Y direction side and its end on the -Y direction side to a second rotating arm 35b and a first rotating arm 35a formed to be rotatable around the axis of the moving shaft 32. The first rotating arm 35a and the second rotating arm 35b are collectively referred to as a rotating arm 35. The rotating arm 35 allows the guide rail 33 to rotate around the axis of the moving shaft 32 while maintaining the relative positional relationship with the cutter unit 34. Usually, the guide rail 33 is fixed below the moving shaft 32 by a guide rail fixing tool 38 described later.

[0033] As a result, the upper end of the cutter unit 34 is fixed to the moving shaft 32 so as to be slidable in the axial direction and rotatable about the axis, and the cutter blade 34d at the lower end is fixed to be slidable relative to the guide rail 33. Therefore, when the cutter unit 34 is gripped and moved, the cutter unit 34 moves parallel to the axial direction of the moving shaft 32 and the guide rail 33, and defects such as the cutter blade 34d coming off the guide rail 33 or cutting the sheet 210 in a curved line can be suppressed. Therefore, in order to cut the sheet 210 in a straight line, the worker does not need to use a ruler or pay attention to the moving direction of the cutter blade, and the workload of the cutting work can be reduced and safety with respect to injuries can be improved.

[0034] When cutting the sheet 210, the worker first manually pulls out the leading end of the sheet 210 from the roll 200, hangs it on the guide section 20, and then pulls it out toward the +X direction so as to straddle the guide rail 33 of the cutting section 30. If necessary, the length of the sheet 210 in the machine direction may be measured with a tape measure or the like to determine the cutting position. Next, the worker grips the gripping section 34e of the cutter unit 34 and moves it from the -Y direction side toward the +Y direction side. This allows a portion of the sheet 210 to be cut from the roll 200 accurately and safely along the width direction. The cut sheet 220 is collected, for example, manually.

[0035] Fig. 4(a) shows an enlarged view of the cutter unit 34 and its surroundings of the sheet cutting device 1 of Fig. 2. As shown in Fig. 4(a), the cutter unit 34 of the sheet cutting device 1 according to this embodiment is configured such that the cutter blade holder 34c extends particularly toward the +Y direction side so as to cover the cutter blade 34d arranged below it from above. With this configuration, even if a hand is carelessly brought close to the periphery of the cutter unit 34, injury caused by the cutter blade 34d can be suppressed. The cutter blade 34d can be a general-purpose product with safety measures such as a safety cutter or a string cutting cutter.

[0036] On the other hand, when the cutter unit 34 is not in use, the cutter unit 34 and the guide rail 33 are rotated around the axis of the moving shaft 32 while the cutter unit 34 is sandwiched between the moving shaft 32 and the guide rail 33, and are retracted. A lower guide rail fixture 38a that can rotate around an axis along the X-axis is fixed near the end of the guide rail 33 of the second moving shaft support frame 31b on the +Y direction side. Also, an upper guide rail fixture 38b that can also rotate around an axis along the X-axis is fixed above the moving shaft 32 of the second moving shaft support frame 31b. The lower guide rail fixture 38a and the upper guide rail fixture 38b can be collectively referred to as guide rail fixture 38, and are members of the same configuration.

[0037] When the lower guide rail fixing device 38a is tilted toward the guide rail 33 by rotating about the X-axis, the lower guide rail fixing device 38a clamps both ends of the guide rail 33 along the X-axis direction, so that the guide rail 33 can be fixed below the movable shaft 32. The position of the guide rail 33 at this time is the cutting position.

[0038] On the other hand, when the lower guide rail fixture 38a is set up on the second moving shaft support frame 31b side by rotating it around the axis along the X-axis, the movement of the guide rail 33 along the X-axis direction by the lower guide rail fixture 38a is not restricted. Therefore, the guide rail 33 can be freely rotated around the axis of the moving shaft 32. Here, the guide rail 33 is rotated about 180 degrees so as to be directly above the moving shaft 32, and the upper guide rail fixture 38b set up on the second moving shaft support frame 31b side is tilted down toward the guide rail 33 by rotating it around the axis along the X-axis. In this case, the upper guide rail fixture 38b sandwiches both ends of the guide rail 33 along the X-axis direction, so that the guide rail 33 can be fixed above the moving shaft 32. The position of the guide rail 33 at this time is the retreat position.

[0039] In this way, the sheet cutting device 1 of this embodiment is provided with a locking mechanism that can rotate the cutter unit 34 and the guide rail 33 around the axis of the moving shaft 32 to retract, and locks the cutter unit 34 and the guide rail 33 in this state. That is, while the cutter unit 34 is sandwiched between the moving shaft 32 and the guide rail 33, the cutter unit 34 and the guide rail 33 can be rotated around the axis of the moving shaft 32 and locked in that position. This allows the device to take a cutting position where the sheet 210 can be cut, and a retracted position where other work can be performed. This position switching can be performed with a simple operation, making it easy to secure a working space when not in use without having to move the entire device.

[0040] It has been described that the rotation of the guide rail 33 around the axis of the moving shaft 32 when switching the guide rail 33 between the cutting position and the retracted position is performed by operating the guide rail fixing device 38 provided on the second moving shaft support frame 31b. However, the switching between the working position and the retracted position is not limited to this configuration. For example, a configuration may be used in which a predetermined recess provided on the surface of the moving shaft 32 and a predetermined protrusion provided on the inner surface of a ring-shaped part of the rotating arm 35 in which a through hole through which the moving shaft 32 penetrates are fitted together at a position corresponding to the cutting position and the retracted position to lock them. Then, the predetermined protrusion may be depressed toward the axis by operating a button or the like to release the lock. Alternatively, other methods may be used.

[0041] [iv] Tension generating section 2, one end of a wire W1 for pulling the cutter unit 34 in the -Y direction is fixed to the mounting portion 34a of the cutter unit 34. The wire W1 may be any elastic member such as a coil spring or rubber band that generates a restoring force for returning the cutter unit 34 to the -Y direction when it is pulled in the +Y direction.

[0042] The wire W1 may be a metal wire or a resin rope that is not highly elastic. In this case, the other end of the wire W1 may be connected to a weight of a predetermined load via a fixed pulley or a cylindrical shaft for winding on the -Y side. Even in this case, when the cutter unit 34 is pulled in the +Y direction, a restoring force is generated to return the cutter unit 34 to the -Y direction. Such a configuration that returns the cutter unit 34 to its original position when the cutter unit 34 is not being operated is called a tension generating unit. That is, a tension generating unit is attached to one end of the cutter unit 34 so that the cutter unit 34 automatically returns to its initial position when not in use.

[0043] In Fig. 2, the initial position of the cutter unit 34 is set to position P1, which is the end on the -Y direction side, by the action of the tension generating part. Next, the worker slides the cutter unit 34 toward the +Y direction side while gripping the gripping part 34e, and the position of the cutter unit 34 moves to position P3, which is the end on the +Y direction side, via position P2, and stops there. Position P2 is the same as the state of the cutter unit 34 in Fig. 1, and is an intermediate cutting state in which a part of the sheet 210 has been cut and the remaining part has not been cut.

[0044] When the operator has completely cut the sheet 210 and released the gripping portion 34e, the cutter unit 34 automatically returns to the initial position P1 due to the restoring force of the wire W1 constituting the tension generating portion, etc. In this way, the operator does not need to manually return the cutter unit 34 to the initial position every time the sheet 210 is cut, improving workability.

[0045] [b] How to cut the sheet Next, a method for cutting the sheet 210 wound around the roll 200 in the width direction to a predetermined length using the above-mentioned sheet cutting device 1 will be described mainly with reference to the flow chart of FIG.

[0046] First, the roll 200 on which the sheet 210 of the object such as a printed matter is wound in a roll shape is set in the supply unit 10 (step S301 in FIG. 5). This allows the roll 200 to rotate freely, and the sheet 210 can be pulled out manually. This is called the sheet arrangement process.

[0047] Here, if the guide rail 33 and the like are in the retreated position, the guide rail fixing device 38 is operated or the like to set the guide rail 33 and the like to the cutting position (step S302). Next, the sheet 210 is unwound from the roll 200 to a predetermined position, and placed on the guide rail 33 of the cutting section 30 through the guide roller 22 of the guide section 20 (step S303). Next, the cutter unit 34 is moved in the width direction by operating the gripping section 34e, and the sheet 210 is cut (step S304). This is the cutting process. Thereafter, by releasing the gripping section 34e, the cutter unit 34 returns to the initial position by the action of the tension generating section described above (step S305).

[0048] Thereafter, if cutting of the sheet 210 is to be repeated, the above-mentioned operations from the unwinding step are repeated (steps S306 and S303). When cutting of the sheet 210 is to be completed, the guide rails 33 and the like are set to the retreated position to enable other operations (step S307). This is called the sheet retreat step. Thereafter, the roll 200 is removed to complete the operation.

[0049] As described above, the sheet cutting device 1 of this embodiment includes the supply unit 10 that rotatably supports the rolled sheet 210, and the cutting unit 30 that cuts the sheet 210 along the width direction. The cutting unit 30 includes a cutter unit 34 including a cutter blade 34d and a cutter blade holder 34c that holds the cutter blade 34d. The cutting unit 30 also includes a moving shaft 32 that supports the cutter unit 34 slidably in the axial direction and rotatably around the axis. The cutting unit 30 also includes a guide rail 33 that is provided at a predetermined distance from the moving shaft 32, has a groove 33a provided along the axial direction, and is supported rotatably around the axis of the moving shaft 32.

[0050] When the cutter unit 34 is slid along the axial direction of the movable shaft 32, the cutter blade 34d moves in parallel while being inserted into the groove 33a of the guide rail 33. This makes it possible to cut the sheet 210 placed on the guide rail 33 in the width direction. When the cutter unit 34 is not in use, the cutter unit 34 and the guide rail 33 can be rotated about the axis of the movable shaft 32 while the cutter unit 34 is sandwiched between the movable shaft 32 and the guide rail 33, and can be retracted.

[0051] By providing the sheet cutting device 1 of this embodiment with the above configuration, manual sheet cutting can be performed safely and easily even in an environment without utilities such as electricity or air, and the workload can be reduced. In addition, when not in use, the cutter unit 34 and guide rail 33 can be retracted by rotating them around the axis of the moving shaft 32. Therefore, when performing another task, it is easy to secure a working space without the workload of moving the entire device.

[0052] 2. Modified cutter unit Next, a modified example of the cutter unit 34 of the sheet cutting device 1 of the present embodiment will be described. Figure 4(b) is a diagram showing a modified cutter unit 36 ​​and its surroundings in the same state as Figure 4(a).

[0053] 4(b), the cutter unit 36 ​​according to the modified example differs from the cutter unit 34 according to the embodiment in that the cutter blade holder 36c extends not along the Y axis but at a predetermined angle upward with respect to the Y axis. That is, the cutter blade holder 36c further includes a protrusion that is inclined at an acute angle toward the movable shaft 32 with respect to the guide rail 33, and the cutter blade 36d disposed between the protrusion and the guide rail 33 is visible.

[0054] The inclination angle θ of such an acute angle can be, for example, 10 degrees or more and 80 degrees or less, and more preferably 30 degrees or more and 60 degrees or less. By setting it to 10 degrees or more and 80 degrees or less, it is possible to select a configuration that prioritizes either the visibility of the cutter blade 36d or the safety of the cutter unit 36, and by setting it to 30 degrees or more and 60 degrees or less, it is possible to select a configuration that satisfies both conditions. [Explanation of symbols]

[0055] 1 Sheet cutting device 10 Supply section 11 Shaft support frame 11a First shaft support frame 11b Second shaft support frame 12 Roll shaft 20 Guide section 21 Guide roller support frame 21a First guide roller support frame 21b Second guide roller support frame 22 Guide roller 30 Cut section 31 Moving shaft support frame 31a First moving shaft support frame 31b Second moving shaft support frame 32 Moving shaft 33 Guide rail 33a groove 34 Cutter unit 34a Mounting part 34b Extension part 34c Cutter blade holder 34d Cutter blade 34e Grip 35 Rotating Arm 35a First rotating arm 35b Second rotating arm 36 Cutter unit 36a Mounting part 36b Extension part 36c Cutter blade holder 36d Cutter blade 36e handle 38 Guide rail fixing device 38a Lower guide rail fixing 38b Upper guide rail fixing device 200 rolls 210 seats 220 Cut Sheet

Claims

1. A supply unit that rotatably supports a roll-shaped sheet; a cutting unit that cuts the sheet along a width direction, The cutting section includes a cutter unit including a cutter blade and a cutter blade holder that holds the cutter blade; a shaft that supports the cutter unit so that the cutter unit is slidable in an axial direction and rotatable about an axis; a guide rail provided at a predetermined interval from the shaft, having a groove formed along the axial direction thereof, and supported rotatably around the axis of the shaft; When the cutter unit is slid along the axial direction of the shaft, the cutter blade is inserted into the groove of the guide rail and moves parallel to the groove, thereby cutting the sheet placed on the guide rail in the width direction, When the cutter unit is not in use, the cutter unit and the guide rail can be rotated about the axis of the shaft to be retracted while the cutter unit remains sandwiched between the shaft and the guide rail.

2. 2. The sheet cutting device according to claim 1, wherein a tension generating section is attached to one end of the cutter unit so that the cutter unit automatically returns to its initial position when not in use.

3. The sheet cutting device of claim 1 or claim 2, wherein the cutter blade holding portion further includes a protrusion portion inclined at an acute angle toward the shaft side relative to the guide rail, and the cutter blade positioned between the protrusion portion and the guide rail is visible.

4. The sheet cutting device according to claim 1 , further comprising a locking mechanism that locks the cutter unit and the guide rail when the cutter unit and the guide rail are rotated around the axis of the shaft and retracted.

5. a sheet arrangement step of rotatably arranging a roll-shaped sheet; a feeding step of feeding the sheet; A cutting step of cutting the sheet along a width direction, The cutting step includes: a cutter unit is slid along the axial direction of a shaft, and a guide rail is provided at a predetermined distance from the shaft and has a groove along the axial direction, and the cutter unit is moved parallel to the guide rail with a cutter blade inserted into the groove, thereby cutting the sheet placed on the guide rail in the width direction; The sheet cutting method further includes a retracting step of rotating the cutter unit and the guide rail around the axis of the shaft while the cutter unit remains sandwiched between the shaft and the guide rail when the cutter unit is not in use.

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