JP6539312B2 - Cutter parts and sheet material cutting device - Google Patents

Description

  The present invention relates to a cutter part and a sheet material cutting device.

  There is known a sheet material cutting apparatus for cutting a label sheet coated with glue according to Patent Document 1 or the like. Patent Document 1 proposes a sheet material cutting device having a movable blade having a guide portion and a groove. By pressing the guide portion against the fixed blade, a good cutting operation is secured.

Unexamined-Japanese-Patent No. 2004-298989

  By the way, when the label paper is cut, there is a problem that the glue adheres to the cutter and the operation of the apparatus becomes unstable. When the label paper is repeatedly cut, glue adheres to the cutting edge, and the adhered glue is gradually deposited at a position slightly away from the cutting edge. When the deposited glue drops, the label paper may be soiled or bite at the cutting point (the meshing point of the cutter) to cause cutting failure. For this reason, the glue which has accumulated regardless of the life of the cutter itself causes a cutting failure etc. Therefore, the device for cutting label paper is a device for cutting general paper to which glue is not attached The life is short compared with that.

  Therefore, Patent Document 1 proposes that the movable blade be provided with a groove extending in the longitudinal direction along the cutting edge. By storing the glue in the groove, the drop of the glue on the label paper is suppressed, and the service life of the device is prolonged. However, machining the groove in the cutter in this way increases the processing cost of the cutter.

  Thus, the device of Patent Document 1 has room for improvement in extending the life of the device by the processing cost of the cutter and prevention of dropping of the glue.

  Then, an object of this invention is to provide the blade part which can be formed by easy process and which does not produce the cutting defect of the apparatus easily by deposit | attachment of glue, and the sheet material cutting device using the same.

The cutter part according to the present invention is
It is a blade part made of metal plate,
The base,
One edge of the base portion is formed by bending, and includes a linear cutting edge formed at a portion forming the thickness of the metal plate at the one end, and a cutting edge configuration forming a glue deposition space between the cutting edge and the base Department,
Both end portions in a direction along the blade edge of the blade edge forming portion are bent and formed, and a guide forming portion including a guide portion continuous with the blade edge is formed at a portion forming the thickness of the metal plate on the same side as the blade edge.

When the cutter part according to one aspect of the present invention is used in combination with another cutter part (for example, a second cutter part provided in a second unit described later, etc.), the guide portion and the cutting edge are pressed by the cutting edge on the other side (Being press-contacted), a good cutting operation can be performed. Moreover, since the glue adhering to the blade tip can be gradually transferred to the glue deposition space each time cutting is repeated, it is possible to make it difficult for the glue to stay at the blade tip. Since the glue accumulates in the glue accumulation space which is not the cutting edge, cutting problems caused by the glue accumulated in the cutter part are suppressed. Furthermore, the blade part having the glue deposition space and the guide part can be formed only by bending a simple and easy metal plate. The blade part according to an aspect of the present invention is a blade part made of a metal plate, which is combined with another blade part as a counterpart.
For this reason, a blade part can be provided which can be formed into a blade by simple processing and is less likely to cause cutting defects due to deposition of glue.

The sheet material cutting device according to the present invention is
A sheet material cutting apparatus for cutting a sheet material conveyed in a conveyance direction with a width direction of the sheet material as a cutting direction,
A first unit having a first cutting edge extending in the cutting direction;
A second unit having a second cutting edge extending in the cutting direction;
And pressing means for pressing the first cutting edge and the second cutting edge to each other,
The first unit and the second unit are configured to be relatively displaced in a direction in which the first cutting edge and the second cutting edge mesh with each other,
The first unit has a first blade part formed by bending a metal plate,
The first blade part is
A first base,
The first base is provided with a linear first cutting edge extending in the cutting direction which is formed by bending one end of the first base and is formed at a portion forming the thickness of the metal plate at the one end; A first cutting edge component forming a first adhesive deposition space between the first base and the first base;
Both ends of the first cutting edge constituting portion in the cutting direction are bent to form a guide having a guide portion which is continuous with the first cutting edge at a portion which forms the thickness of the metal plate on the same side as the first cutting edge. Have a department.

According to the sheet material cutting device according to one aspect of the present invention, since the guide portion and the first cutting edge are pressed by the second cutting edge by the pressing means, a good cutting operation can be performed. Moreover, since the glue adhering to the 1st blade edge can be made to shift gradually to the 1st glue deposition space whenever it repeats cutting, the glue adhering to the 1st blade edge can make it hard to deposit on the 1st blade edge. Since the glue accumulates in the first glue accumulation space which is not the first cutting edge, cutting problems caused by the glue accumulated in the first blade part are suppressed. Furthermore, the first blade part having the first adhesive deposition space and the guide portion can be formed only by bending a simple and easy metal plate.
For this reason, a sheet material cutting device is provided that can form a blade with simple processing and is less likely to cause cutting failure of the device due to glue deposition.

In the sheet material cutting apparatus of the present invention,
The second unit has a second blade part formed by bending a metal plate,
The second blade part is
A second base,
One end of the second base portion is formed by bending, and a linear second cutting edge extending in the cutting direction is formed at a portion forming the thickness of the metal plate at the one end, the second cutting edge and the second cutting edge It may have a second cutting edge component that forms a second glue deposition space with the base.

  According to the sheet material cutting device relating to the present aspect, the glue deposition space is provided in both the first unit and the second unit. For this reason, even when the sheet material to which glue adheres is cut on the upper surface or the lower surface, and in some cases on both sides, the glue can be difficult to stay on the first cutting edge and the second cutting edge, and the glue is not the first cutting edge and the second cutting edge It is possible to deposit in the first glue deposition space and the second glue deposition space.

In the sheet material cutting apparatus of the present invention,
At least a portion of the guide forming portion may be supported by a holder attached to the first base.

  According to the sheet material cutting device according to the present aspect, the guide forming portion is supported not only by the connecting portion with the first cutting edge forming portion (the bending portion of the metal plate) but also by the holder. For this reason, a large mechanical strength is not required for the guide forming portion and the connecting portion between the first blade edge forming portion and the guide forming portion, so that the first blade part can be easily made compact.

In the sheet material cutting apparatus of the present invention,
A housing for housing the first unit and the second unit;
The pressing means may be provided between the holder and the housing.

  According to the sheet material cutting apparatus according to the present aspect, since the pressing means is supported by the housing having relatively high strength, the pressing means reliably presses (pressure contact) the first blade part through the holder. Can act.

  According to the present invention, it is possible to provide a blade part which can be formed by a simple process and which is unlikely to cause a cutting defect of the device due to the deposition of glue, and a sheet material cutting device using the same.

It is a perspective view of a sheet material cutting device concerning this embodiment. It is a sectional view of a sheet material cutting device concerning this embodiment. It is a perspective view of the 1st unit and the 2nd unit supported by the holder. It is a front view of the 1st blade part and the 2nd blade part. It is a figure which shows the motion of the 1st blade part at the time of cutting | disconnection of a sheet material, Comprising: (a) is a side view before cutting, (b) is a side view after cutting. It is a front view of the 1st blade part without a guide formation part concerning a comparative example, and the 2nd blade part. It is a figure explaining the cutter used in the Example, and (a) is a side view of the 2nd blade part, (b) is a side view of the 1st blade part.

  Hereinafter, examples of embodiments of a blade part and a sheet material cutting device according to the present invention will be described with reference to the drawings. The present invention is not limited to these exemplifications, but is shown by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

  FIG. 1 is a perspective view of a sheet material cutting device 10 according to the present embodiment. FIG. 2 is a cross-sectional view of the sheet material cutting device 10. As shown to FIG. 1 and FIG. 2, the sheet material cutting device 10 which concerns on this embodiment cut | disconnects the width direction of the sheet material S as the cutting direction Y. As shown in FIG. In the sheet material cutting device 10, the sheet material S is conveyed in the conveyance direction X. In the present embodiment, the transport direction X may be a horizontal direction, and the cutting direction Y is a direction orthogonal to the transport direction X. The transport direction X is not limited to the horizontal direction.

In the following description, directions are defined as follows.
The transport direction X indicates the left-right direction in FIG. The sheet material S is conveyed from left to right in FIG. Therefore, the left side in FIG. 2 is referred to as the upstream side X1 in the transport direction X, and the right side in FIG. 2 is referred to as the downstream side X2 in the transport direction X.
The cutting direction Y indicates the left-right direction in FIG. The left side in FIG. 1 is called one side Y1 of the cutting direction Y, and the right side in FIG. 1 is called the other side Y2 of the cutting direction Y.
The up and down direction Z indicates the up and down direction in FIG. The upper side in FIG. 1 is referred to as the upper side Z1 in the vertical direction Z, and the lower side is referred to as the lower side Z2 in the vertical direction Z.

  The sheet material cutting device 10 includes a first unit 20, a second unit 30, a pressing unit 45, and a housing 11. The first unit 20 has a first cutting edge 21 extending in the cutting direction Y. The second unit 30 has a second cutting edge 31 extending in the cutting direction Y. The housing 11 accommodates therein the first unit 20 and the second unit 30.

  The first unit 20 and the second unit 30 are configured to be relatively displaced in the direction in which the first cutting edge 21 and the second cutting edge 31 mesh with each other. In the present embodiment, the first unit 20 is attached to the housing 11 so as to be vertically displaceable, and the second unit 30 is fixed to the housing 11.

  The housing 11 is composed of a first case 12 and a second case 13. By combining the first case 12 and the second case 13, a housing space for housing the first unit 20 and the second unit 30 is formed inside. A bracket 14 is fixed to the first case 12. The second unit 30 is fixed to the bracket 14 by means of screws 38.

  FIG. 3 is a perspective view of the first unit 20 and the second unit 30. As shown in FIG. As shown in FIG. 3, the first unit 20 has a first blade part 22. The first cutter part 22 is formed by bending a metal plate cut or punched into a predetermined shape. The first blade part 22 has a first base 23, a first cutting edge forming part 24 and a guide forming part 25. The first base portion 23 is a plate-like portion extending in the vertical direction Z intersecting the transport direction X.

  The first cutting edge constituting portion 24 is formed by bending one end of the first base portion 23. In the example shown in FIG. 3, the first cutting edge constituting portion 24 is formed by bending the lower end of the first base portion 23 to the upstream side X1 in the transport direction X. The first cutting edge constituting portion 24 has a linear first cutting edge 21 formed in a portion which forms the thickness of the metal plate at one end of the first base portion 23. Here, in the example shown in FIG. 3, “the portion forming the thickness of the metal plate at one end of the first base portion 23” is a portion bent to the upstream side X1 in the transport direction X of the first base portion 23 (first A surface 24a (upper surface) which is the blade edge constituting portion 24) and which becomes the upper side Z1 of the first blade edge constituting portion 24 in the vertical direction Z, and a surface (lower surface) which becomes the lower side Z2 opposite thereto The site | part comprised with the end surface of the metal plate which connects (the upper surface and lower surface) is intended. And in the example shown in FIG. 3, the linear 1st cutting edge 21 is in the linear edge of the corner | angular part of the upstream X1 of the lower surface in the site | part which makes the thickness of the metal plate of one end of this 1st base 23 It is formed by polishing or the like (see FIG. 7 (b)).

  A first glue deposition space 26 is formed between the first cutting edge 21 and the first base 23. In the example shown in FIG. 3, the surface 23 a (the surface on the front side in FIG. 3) that is the upstream side X1 in the transport direction X of the first base 23 and the upper side Z1 in the vertical direction Z of the first cutting edge component 24 A space formed by the first surface 24 a (upper surface) is a first adhesive deposition space 26.

  The guide forming portion 25 is formed by bending both end portions of the first cutting edge forming portion 24 in the cutting direction Y. The guide forming portion 25 has a guide portion 27 which is continuous with the first cutting edge 21 at a portion which forms the thickness of the metal plate on the same side as the first cutting edge 21 (upstream side X1 in the transport direction X).

  The guide forming portion 25 is formed by bending both end portions of the first cutting edge forming portion 24 in the cutting direction Y in mutually opposite directions. In the example shown in FIG. 3, one end of the guide forming portion 25 (hereinafter referred to as “left guide formation” is formed by bending the end of the other side Y2 in the cutting direction Y of the first cutting edge forming portion 24 downward Z2 in the vertical direction Z Section 25A "is formed. The other end of the guide forming portion 25 (hereinafter referred to as "right guide forming portion 25B") is formed by bending the end of one side Y1 in the cutting direction Y of the first cutting edge configuration portion 24 upward Z1 in the vertical direction Z. It is done.

  In the following description, the guide portion formed in the left guide forming portion 25A is referred to as the left guide portion 27A, and the guide portion formed in the right guide forming portion 25B is referred to as the right guide portion 27B. When the left guide forming portion 25A and the right guide forming portion 25B are referred to without distinction, they are referred to as the guide forming portion 25. When the left guide portion 27A and the right guide portion 27B are referred to without distinction, they are referred to as the guide portion 27. . The details of the left guide portion 27A and the right guide portion 27B will be described later.

  The first blade part 22 is attached to a plate-like holder 40 by means of a screw 28. The holder 40 is attached to one surface of the metal plate constituting the first base portion 23, which is opposite to the first cutting edge 21. The holder 40 is attached to the surface (surface which becomes the back side and can not be visually recognized in FIG. 3) which becomes downstream X2 of the conveyance direction X of the 1st base part 23. As shown in FIG. The holder 40 is in contact with a downstream portion X2 (in FIG. 3, a portion which can not be seen in the back side in FIG. 3) on the downstream side X2 in the transport direction X which forms the thickness of the metal plate of the guide forming portion 25.

  The second unit 30 has a second blade part 32. The second blade part 32 is formed by bending a metal plate which has been cut or punched into a predetermined shape. The second blade part 32 has a second base 33 and a second cutting edge component 34. The second base portion 33 is a plate-like portion extending in the vertical direction Z intersecting the transport direction X.

  The second blade edge configuration portion 34 is formed by bending one end of the second base portion 33. In the example illustrated in FIG. 3, the second blade edge configuration portion 34 is formed by bending the upper portion in the vertical direction Z of the second base portion 33 to the downstream side X2 in the transport direction X. The second cutting edge constituting portion 34 has a linear second cutting edge 31 formed in a portion which forms the thickness of the metal plate at one end of the second base portion 33. Here, in the example shown in FIG. 3, “the portion forming the thickness of the metal plate at one end of the second base 33” is a portion bent to the downstream side X2 in the transport direction X of the second base 33 (second A surface (upper surface) which becomes the upper side Z1 of the second blade edge constituting portion 34 in the vertical direction Z, and a surface (lower surface) which becomes the lower side Z2 opposite thereto in the vertical direction Z The site | part comprised with the end surface of the metal plate which connects an upper surface and a lower surface is intended. And in the example shown in FIG. 3, the linear second cutting edge 31 is at the linear edge of the corner of the downstream side X2 of the upper surface at the portion forming the thickness of the metal plate at one end of the second base 33. It is formed by polishing or the like (see FIG. 7A).

  A second glue deposition space 36 is formed between the second cutting edge 31 and the second base 33. In the example shown in FIG. 3, the lower side Z2 in the vertical direction Z of the second blade edge constituting portion 34 and the surface (the surface which will be the back side in FIG. 3) of the second base portion 33 becomes the downstream side X2 in the transport direction X. The space defined between the lower surface and the lower surface is the second glue deposition space 36.

  The plate-like holder 40 to which the first cutter component 22 is attached has a window 41 formed substantially at the center and a pair of support pieces 42 formed on both ends in the cutting direction Y. The support piece portion 42 is provided with a pin 43 extending in the cutting direction Y.

  The pin 43 is inserted into a long hole 12 a formed in the side plate of the first case 12 as shown in FIG. 1. The long holes 12 a extend in the vertical direction Z intersecting the transport direction X. Thus, the holder 40 is supported on the housing 11 so as to be pivotable about an axis along the cutting direction Y of the pin 43 and to be displaceable in the vertical direction Z intersecting the conveying direction X.

  The holder 40 is driven by the drive mechanism 50 in the vertical direction Z, as shown in FIG. The drive mechanism 50 includes a motor 54 and a transmission mechanism 51 including a gear that can rotate around the rotation axis R1. The transmission mechanism 51 has a drive pin 52 extending parallel to the rotation axis R1 at a position away from the rotation axis R1. The drive pin 52 is inserted into the window 41 of the holder 40. The window portion 41 displaces the holder 40 in the vertical direction Z by the displacement of the drive pin 52, but does not displace the holder 40 in the cutting direction Y by the displacement of the drive pin 52. Therefore, when the drive pin 52 is rotated by the motor 54 about the rotation axis R1 via the transmission mechanism 51, the holder 40 is displaced in the vertical direction Z. Thereby, the first unit 20 is displaced in the vertical direction Z. The first unit 20 is displaced in the vertical direction Z within a certain stroke range.

  The pressing means 45 presses the first unit 20 toward the second unit 30, as shown in FIG. The pressing means 45 is composed of a plurality of plate springs 46. The pressing means 45 presses the first cutting edge 21 toward the second cutting edge 31 by the elastic force of the plate spring 46. The pressing means 45 is provided between the first case 12 constituting the housing 11 and the holder 40. One end of the plate spring 46 is fixed to the first case 12, and the other end is in contact with the holder 40. Since the holder 40 is supported swingably about the axis along the cutting direction Y with respect to the housing 11, the first cutting edge 21 provided below in the vertical direction Z from the pin 43 is pressed by the pressing means 45. The second cutting edge 31 is pressed.

  FIG. 4 is a front view of the first cutter part 22 and the second cutter part 32. FIG. As shown in FIG. 4, the first unit 20 and the second unit 30 are arranged such that the linear first cutting edge 21 is inclined with respect to the linear second cutting edge 31 (see FIG. 3) in a front view. It is done. In the present embodiment, the second cutting edge 31 which is not driven is arranged to extend in the cutting direction Y which is the horizontal direction, and the driven first cutting edge 21 is arranged to be inclined with respect to the horizontal direction. As a result, the first cutting edge 21 and the second cutting edge 31 always mesh with each other at a predetermined shear angle.

  In FIG. 4, the first blade part 22 drawn by a solid line shows the first blade part 22 at the upper limit position of the stroke of the first unit 20 (see FIG. 2), and the first blade part 22 drawn by a broken line The first cutting edge constituting portion 24 and the guide forming portion 25 at the lower limit position of the stroke of the unit 20 are shown. As shown in FIG. 4, the second cutting edge 31 is always in contact with any one of the left guide portion 27A, the first cutting edge 21 and the right guide portion 27B.

  The positional relationship between the first cutting edge 21 and the second cutting edge 31 indicates the lower end of the first cutting edge 21 at the upper position Z1 in the vertical direction Z relative to the second cutting edge 31 as indicated by the solid line. The cutting edge 31 is pressed by the left guide portion 27A (see the left in FIG. 4). When the positional relationship between the first cutting edge 21 and the second cutting edge 31 is indicated by a broken line, in a state where the upper end of the first cutting edge 21 is positioned lower Z2 in the vertical direction Z than the second cutting edge 31, the second The cutting edge 31 is pressed by the right guide portion 27B (see the right in FIG. 4).

  The lower end of the first cutting edge 21 is Z2 lower than the second cutting edge 31 in the vertical direction Z and is a middle positional relationship between the case where the first cutting edge 21 and the second cutting edge 31 are indicated by a solid line and a broken line. In a state where the upper end of the first cutting edge 21 is positioned above the second cutting edge 31 in the vertical direction Z, the second cutting edge 31 is pressed by the first cutting edge 21. Here, in a state where the first cutting edge 21 and the second cutting edge 31 are pressed to each other, the first cutting edge 21 and the second cutting edge 31 contact at one point, and this contact point is called a cutting point or a meshing point. When the first cutter part 22 is displaced from the upper Z1 to the lower Z2 in the vertical direction Z, this cutting point is from the other side Y2 (left in FIG. 4) to the one side Y1 (right in FIG. 4) along the cutting direction Y Move to).

  Next, with reference to FIG. 5 and FIG. 2 and FIG. 4 as needed, the operation at the time of cutting the sheet material S by the sheet material cutting device 10 will be described. FIG. 5 (a) corresponds to the state shown by the solid line in FIG. 4, and shows the state of the first unit 20 and the second unit 30 before the sheet material S is cut. As shown in FIG. 5A, before cutting the sheet material S, the left guide portion 27A of the first cutting tool component 22 presses against the second cutting edge 31.

  When the drive pin 52 is rotated by the motor 54 (see FIG. 2) from the state of FIG. 5A, the holder 40 is displaced downward Z2 in the vertical direction Z intersecting the transport direction X. When the first unit 20 attached to the holder 40 is displaced downward Z2 in the vertical direction Z with respect to the second unit 30, the cutting point formed by the first cutting edge 21 and the second cutting edge 31 is one side of the cutting direction Y Move to Y1 (see FIG. 4). The first unit 20 moves downward Z2 in the vertical direction Z while maintaining the first blade edge 21 and the second blade edge 31 at a predetermined shear angle. Then, the sheet material S is cut from the other side Y2 to the one side Y1 along the cutting direction Y. At this time, the second cutting edge 31 is smoothly guided to the first cutting edge 21 by the left guide portion 27A and smoothly meshed with the first cutting edge 21 and then from the first cutting edge 21 to the right guide portion 27B (FIG. 5 (b ))) Guided smoothly. As a result, the sheet material S is favorably cut by the first cutting edge 21 and the second cutting edge 31 which press and mesh with each other.

  FIG. 5 (b) corresponds to the state shown by the broken line in FIG. 4, and shows the state of the first unit 20 and the second unit 30 after cutting the sheet material S. As shown in FIG. 5B, after the sheet material S is cut, the right guide portion 27B presses the second cutting edge 31 of the second unit 30. Therefore, while cutting the sheet material S, the state where the first cutting edge 21 and the second cutting edge 31 are pressed to and engaged with each other is maintained.

  While the first unit 20 is displaced downward in the vertical direction Z from the upper limit position of the stroke of the first unit 20 until the first cutting edge 21 meshes with the second cutting edge 31, the left guide portion 27A Guide to the first cutting edge 21 continuously. While the first unit 20 is displaced upward in the vertical direction Z from the lower limit position of the stroke of the first unit 20 until the first cutting edge 21 meshes with the second cutting edge 31, the right guide portion 27B Guide to the first cutting edge 21 continuously. In order to exhibit such a function, the left guide portion 27A and the right guide portion 27B are shaped to be continuous with the first cutting edge 21.

  The “guide portion 27 continuous with the first cutting edge 21” refers to one of the guide portions 27 (left guide) in which the second cutting edge 31 pressed by the first cutter part 22 is in contact with the standby (before the cutting operation) A step or unevenness unique to the path of moving from the surface of the portion 27A) to the surface of the first cutting edge 21 by the cutting operation and further moving from the surface of the first cutting edge 21 to the surface of the other guide portion 27 (right guide portion 27B) Refers to an aspect without For example, it refers to a guide portion 27 that enables smooth movement without causing rapid displacement such as the second cutting edge 31 being caught by the first cutting tool part 22 or the second cutting edge 31 jumping from the first cutting tool part 22. . The surface of the guide portion 27 may be flat or curved. In addition, even if the surface of the guide portion 27 has a convex portion or a concave portion, the guide portion 27 smoothly makes the second cutting edge 31 if the degree of change in surface shape (for example, slope) due to the convex portion or concave portion is sufficiently gentle. Since it can guide continuously, it can be said as "the guide part 27 continuous with the 1st blade edge 21".

  During the operation of the sheet material cutting device 10, the second cutting edge 31 is smoothly guided by the guide portion 27 toward the first cutting edge 21. Specifically, when the cutting of the sheet S is started, the second cutting edge 31 is guided to the first cutting edge 21 by the left guide portion 27A, and when the cutting of the sheet S ends and returns to the standby position. Is guided to the first cutting edge 21 by the right guide portion 27B. At this time, since the second cutting edge 31 slides while being pressed and pressed by the guide portion 27, the rapid movement of the relative displacement with respect to the first blade part 22 is limited by the guide portion 27, and the left guide portion 27A To the first cutting edge 21 and from the right guide 27B to the first cutting edge 21 smoothly and continuously. Further, the guide portion 27 of the first blade component 22 on which the second cutting edge 31 is pressed is constantly receiving pressing force (pressure contact force) from the second cutting edge 31.

  By the way, when cutting the sheet material S to which the glue adheres to the surface (upper surface) of the upper side Z1 in the vertical direction Z, the surface which becomes the upstream side X1 in the transport direction X of the first cutting edge constituting portion 24 (see FIG. 3) There is a possibility that the glue adheres to the surface of the metal plate on the front side in 3). The glue adhering to the surface on the upstream side X1 in the transport direction X of the first cutting edge constituting portion 24 is further moved by the second cutting edge 31 as the first unit 20 descends. It is pushed up to the surface forming the glue deposition space 26). When such movement of the glue is repeated, the glue is deposited in the first glue deposition space 26 formed by the first cutting edge component 24 and the first base 23. Since the glue deposited in the first glue deposition space 26 is held in this state, the glue does not fall on the sheet material S or get caught between the first cutting edge 21 and the second cutting edge 31. For this reason, the cutting defect of the sheet material cutting device 10 does not easily occur.

  Thus, the first blade component 22 according to the present embodiment has the guide forming portion 25 having the guide portion 27 continuous with the first cutting edge 21. For this reason, the second blade edge 31 can always be in contact with the guide portion 27 or the first blade edge 21 of the first blade component 22 by the pressing means 45. Thereby, the meshing state between the first cutting edge 21 and the second cutting edge 31 can be formed with certainty, and the sheet material cutting device 10 can perform a good cutting operation.

  In addition, the glue adhering to the first cutting edge 21 gradually transfers from the first cutting edge 21 to the first glue deposition space 26 each time cutting is repeated. Therefore, it is possible to make it difficult for the glue adhering to the first cutting edge 21 to deposit on the first cutting edge 21 as it is, and to deposit the adhering glue in the first glue deposition space 26. Since the glue accumulates in the first glue accumulation space 26 which is not the first cutting edge 21, cutting problems caused by the glue accumulated in the first blade part 22 are suppressed.

  Further, as described above, the first blade part 22 provided with the guide portion 27 for securing a good cutting operation and the first adhesive deposition space 26 for suppressing the cutting failure caused by the glue is a simple metal plate bending process Can be formed by

  For the above reasons, a blade part that can be formed by simple processing is provided, and a sheet material cutting device 10 that is less likely to cause cutting defects due to deposition of glue is provided.

  By the way, in order to cut the sheet material S, the first cutting edge 21 is inclined with respect to the second cutting edge 31 to have a shear angle, and the first cutting edge 21 and the second cutting edge 31 are crossed to make a toe-in angle. It is necessary to bring the first cutting edge 21 and the second cutting edge 31 into contact at one point.

  Therefore, as shown in FIG. 6, when the first blade edge 21 does not have a guide forming portion, the predetermined opening height (the gap between the first blade edge 21 and the second blade edge 31) necessary for conveying the sheet S In order to ensure the width, the blade width (effective cutting length), which is the dimension in the width direction of the first cutting edge 21 and the second cutting edge 31, must be increased relative to the width W of the sheet material S.

  On the other hand, in the present embodiment, the guide portions 27 formed at both ends in the cutting direction Y of the first cutting edge configuration portion 24 are brought into contact with the second cutting edge 31. For this reason, the second blade edge 31 abuts on the left guide portion 27A on the other side Y2 of the cutting direction Y (see FIG. 4), whereby the predetermined opening height (the gap between the first blade edge 21 and the second blade edge 31) The blade width (effective cutting length) of the first cutting edge 21 and the second cutting edge 31 with respect to the width W of the sheet material S can be reduced while securing the compact sheet material cutting device 10 easily.

  Moreover, in the sheet material cutting device 10 according to the present embodiment, not only the first unit 20 but also the second unit 30 is provided with the second glue deposition space 36. For this reason, even if glue adheres to any surface of the upper surface or the lower surface of the sheet material S, when cutting the sheet material S, it is possible to make it difficult to stay the glue on the first cutting edge 21 and the second cutting edge 31; The glue can be deposited in the first glue deposition space 26 and the second glue deposition space 36 which are not the first cutting edge 21 and the second cutting edge 31.

  Further, as shown in FIGS. 5A and 5B, the guide forming portion 25 (the left guide forming portion 25A and the right guide forming portion 25B) is supported by the holder 40 attached to the first base portion 23. ing. A surface (a surface on the downstream side X2 in the transport direction X) opposite to the guide portion 27 (left guide portion 27A and right guide portion 27B) of the guide forming portion 25 is in contact with the holder 40. The guide forming portion 25 receives a force that is pushed from the second cutting edge 31 to the downstream side X2 in the transport direction X. Since the holder 40 supports the guide forming portion 25 against such a force, it is difficult for the force to be concentrated on the connecting portion (the bent portion of the metal plate) of the guide forming portion 25 and the first cutting edge constituting portion 24 . Therefore, since a large mechanical strength is not required for the guide forming portion 25 or the connecting portion between the first blade edge forming portion 24 and the guide forming portion 25, the first blade component 22 can be easily configured in a compact manner. Specifically, the height T1 of the guide forming portion 25 can be reduced, whereby the overall height T2 of the first blade part 22 can be suppressed. The entire guide forming portion 25 may not be supported by the holder 40, as long as at least a part of the guide forming portion 25 is supported by the holder 40.

  Further, in the present embodiment, the first cutting edge 21 may be pressed to the second cutting edge 31 with a simple configuration in which the pressing means 45 including the plate spring 46 is provided between the holder 40 and the first case 12 of the housing 11. it can. Since the pressing means 45 is supported by the housing 11 having relatively high strength, the pressing means 45 can reliably apply a pressing force (pressure contact force) to the first blade part 22 via the holder 40.

  In the embodiment described above, an example in which the first unit 20 includes the cutter component having the guide forming portion 25 has been described, but even if the second unit 30 is configured to include the blade component having the guide forming portion Good.

  The first blade part 22 and the second blade part 32 were produced to produce the sheet material cutting device 10, and a test for cutting the sheet material S was conducted to evaluate the life of the sheet material cutting device 10. Here, the term "life" as used herein refers to the evaluation of the number of times the sheet material cutting device 10 can cut the sheet material without any problems in conveying and cutting the sheet material. Hereinafter, FIG. 7 will be referred to as appropriate.

(1) First blade part 22 and second blade part 32
A hardened material made of stainless steel capable of being press-formed was selected as a metal plate (material for a blade) as the first blade component 22 and the second blade component 32.
As shown in FIGS. 7 (a) and 7 (b), the thickness of the metal plate was 0.7 mm. The bending angle of the second cutting edge 31 of the second blade part 32 is 70 °, and the bending angle of the first cutting edge 21 of the first blade part 22 is 80 °. In the example shown in FIG. 7, the bending and raising angles of the first cutting edge 21 and the second cutting edge 31 are 70 ° and 80 °, respectively, but the present invention is not limited to such angles.

  Here, it is preferable to set the bending and raising angles of the first cutting edge 21 and the second cutting edge 31 within the range of 30 ° to 90 °, respectively, which can be formed by simple processing and cause cutting failure of the device due to deposition of glue. Hateful. The bending angle of each of the first cutting edge 21 and the second cutting edge 31 is obtuse when it exceeds 90 °, and the sharpness is deteriorated. Therefore, it is preferable to select each as necessary. Also, the smaller the bending angle of the first cutting edge 21 and the second cutting edge 31, the sharper the sharpness becomes, but the space for storing glue in the first glue deposition space 26 and the second glue deposition space 36 is small As a result, it is considered that the angle forming the cutting edge (cutting edge angle) becomes small and damage to the cutting edge (cutting edge) is likely to occur. From this first point of view, the bending and raising angles (lower limit values) of the first cutting edge 21 and the second cutting edge 31 are set to be larger, such as 30 ° or more, 40 ° or more, 50 ° or more, or 60 ° or more. preferable. In addition, the larger the bending angle of the first cutting edge 21 and the second cutting edge 31, the larger the space for storing glue in the first paste deposition space 26 and the second paste deposition space 36. However, the first cutting edge 21 or the second cutting edge When the glue adhering to 31 becomes difficult to move toward the back side (bent portion) of the first glue deposition space 26 or the second paste deposition space 36 and becomes easy to deposit at a position near the first cutting edge 21 or the second cutting edge 31 Conceivable. From this second point of view, it is preferable to set the bending angle (upper limit value) of the first cutting edge 21 and the second cutting edge 31 to be as small as 90 ° or less, 80 ° or less, or 70 ° or less. Therefore, the bending angle of the first cutting edge 21 and the second cutting edge 31 is set by combining the respective angles in the range of 60 ° to 80 ° in consideration of the balance between the first aspect and the second aspect. It is recommended to select each as needed.

(2) Preparation of the first blade part 22 and the second blade part 32 A work to be the first blade part 22 and the second blade part 32 is punched out of a metal plate by press processing.
The workpiece is bent using a mold to form a first blade part 22 and a second blade part 32.
The portions corresponding to the first cutting edge 21 and the second cutting edge 31 are ground (surface grinding) or polished to form the cutting edge. In the first blade part 22, the dimension in the height direction (left and right direction in FIG. 7B) which was 3.2 mm before polishing was 3.0 mm by polishing. In the second blade part 32, the dimension in the height direction (left and right direction in FIG. 7A), which was 2.7 mm before polishing, was 2.5 mm by polishing.
Thereafter, deburring is performed on the first blade part 22 and the second blade part 32 as necessary, and non-adhesive coating (fluororesin-based) is performed.

(3) Test result A sheet material cutting device is assembled using the first blade part and the second blade part obtained as described above, and the sheet material is a label paper without release paper with glue adhered to one side (total width 85 mm) Was selected, and the label paper was cut 450,000 times. In the meantime, in the sheet material cutting device 10, no conveyance failure or cutting failure of the label paper occurred.
As described above, according to the sheet material cutting apparatus according to the present embodiment, it has been confirmed that a problem due to the adhesion of the glue is unlikely to occur even if the sheet material (for example, the above-mentioned label paper) to which the glue adheres is repeatedly cut.

10: sheet material cutting device, 11: housing, 12: first case, 12a: long hole, 13: second case, 14: bracket, 20: first unit, 21: first cutting edge, 22: first blade part , 23: first base, 24: first blade edge component, 25: guide forming portion, 25A: left guide forming portion, 25B: right guide forming portion, 26: first glue deposition space, 27: guide portion, 27A: Left guide part 27B: right guide part 28: screw 30: second unit 31: second blade edge 32: second blade part 33: second base 34: second blade edge component 36: second blade Double glue deposition space 38: screw 40: holder 41: window 42: support piece 43: pin 45: pushing means 46: leaf spring 50: drive mechanism 51: transmission mechanism 52: Drive pin, 54: Motor, X: Transport direction, Y: Cutting direction, Z Up-and-down direction, S: sheet material

Claims (5)

The first blade part of a sheet material cutting device for cutting a sheet material using a first blade part and a second blade part, wherein
Wherein the first tool part, Ri Do a metal plate,
The base,
One edge of the base portion is formed by bending, and includes a linear cutting edge formed at a portion forming the thickness of the metal plate at the one end, and a cutting edge configuration forming a glue deposition space between the cutting edge and the base Department,
Both end portions in a direction along the blade edge of the blade edge forming portion are bent and formed, and a guide forming portion including a guide portion continuous with the blade edge at a portion forming the thickness of the metal plate on the same side as the blade edge 1st blade parts. A sheet material cutting apparatus for cutting a sheet material conveyed in a conveyance direction with a width direction of the sheet material as a cutting direction,
A first unit having a first cutting edge extending in the cutting direction;
A second unit having a second cutting edge extending in the cutting direction;
And pressing means for pressing the first cutting edge and the second cutting edge to each other,
The first unit and the second unit are configured to be relatively displaced in a direction in which the first cutting edge and the second cutting edge mesh with each other,
The first unit has a first blade part formed by bending a metal plate,
The first blade part is
A first base,
The first base is provided with a linear first cutting edge extending in the cutting direction which is formed by bending one end of the first base and is formed at a portion forming the thickness of the metal plate at the one end; A first cutting edge component forming a first adhesive deposition space between the first base and the first base;
Both ends of the first cutting edge constituting portion in the cutting direction are bent to form a guide having a guide portion which is continuous with the first cutting edge at a portion which forms the thickness of the metal plate on the same side as the first cutting edge. Sheet material cutting device having a part. The second unit has a second blade part formed by bending a metal plate,
The second blade part is
A second base,
One end of the second base portion is formed by bending, and a linear second cutting edge extending in the cutting direction is formed at a portion forming the thickness of the metal plate at the one end, the second cutting edge and the second cutting edge The sheet material cutting device according to claim 2, further comprising a second cutting edge component that forms a second adhesive deposition space with the base.   The sheet material cutting device according to claim 2, wherein at least a part of the guide forming portion is supported by a holder attached to the first base. A housing for housing the first unit and the second unit;
The sheet material cutting device according to claim 4, wherein the pressing means is provided between the holder and the housing.

Images