JP2019025560A - Cutter component and sheet material cutting device - Google Patents

Abstract

To provide a cutter component which can be formed by a simple processing and in which cutting failure of a device due to accumulation of a paste hardly occurs, and a sheet material cutting device using the same.SOLUTION: A first unit 20 and a second unit 30 are configured so that a first tooth point 21 and a second tooth point 31 are relatively displaced in directions where the tooth points are engaged each other. The first unit 20 has a first cutter component 22 formed by folding a metal plate. The first cutter component 22 comprises a first base part 23, a first tooth point constitution part 24 which is formed by folding one end of the first base part 23, which comprises a linear first tooth point 21 extended in a cutting direction Y formed on a portion forming a thickness of the metal plate on one end, and which forms a first paste accumulation space 26 between the first tooth point 21 and the first base part 23, and a guide formation part 25 formed by folding both end parts of the first tooth point constitution part 24 in the cutting direction Y, and which has a guide part 27 continuous to the first tooth point 21 on a portion forming a thickness of the metal plate on a same side to the first tooth point 21.SELECTED DRAWING: Figure 3

Description

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

  Patent Document 1 discloses a sheet material cutting device that cuts label paper coated with glue. 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.

JP 2004-298899 A

  By the way, when the label paper is cut, there is a problem that the adhesive adheres to the blade and the operation of the apparatus becomes unstable. When the cutting of the label paper is repeated, glue adheres to the blade edge, and the adhered glue gradually accumulates at a position slightly away from the blade edge. When the accumulated glue falls, the label paper is soiled or cut into a cutting point (engagement point of the blade) to cause cutting failure. For this reason, the glue that accumulates causes cutting failure regardless of the life of the blade itself. Therefore, the device that cuts label paper is a device that cuts general paper without glue. Compared to short lifespan.

  Therefore, Patent Document 1 proposes that the movable blade is provided with a groove extending in the length direction along the blade edge. By accumulating glue in the groove, the glue is prevented from dropping on the label paper, and the life of the device is extended. However, when a groove is machined in the blade in this way, the machining cost of the blade increases.

  As described above, the apparatus of Patent Document 1 has room for improvement in terms of extending the life of the apparatus by cutting the blade and preventing the glue from dropping.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a blade component that can be formed by simple processing and hardly causes a cutting failure of the apparatus due to paste accumulation, and a sheet material cutting apparatus using the blade part.

The blade part according to the present invention is:
A blade part made of a metal plate,
The base,
A blade edge configuration in which one end of the base portion is formed by being bent, and includes a linear blade edge formed at a portion forming the thickness of the metal plate at the one end, and forming a paste accumulation space between the blade edge and the base portion And
It has a guide forming part provided with a guide part which is formed by bending both ends in the direction along the cutting edge of the cutting edge constituent part and which is continuous with the cutting edge at a portion forming the thickness of the metal plate on the same side as the cutting edge.

When the blade component according to one aspect of the present invention is used in combination with another blade component (for example, a second blade component provided in a second unit described later), the guide portion and the blade edge are pressed against the other blade edge. Since it is pressed, a good cutting operation can be performed. Moreover, since the glue adhering to the blade edge can be gradually transferred to the glue accumulation space every time cutting is repeated, the glue can hardly stay on the blade edge. Since the glue accumulates in the glue accumulation space that is not the cutting edge, cutting defects caused by the glue accumulated on the blade part are suppressed. Furthermore, the blade part having the paste accumulation space and the guide portion can be formed only by simple and easy bending of the metal plate. The blade part according to one aspect of the present invention is a blade part made of a metal plate, which is combined with another blade part.
For these reasons, it is possible to provide a blade part that can form a blade by simple processing and hardly cause cutting failure due to paste accumulation.

Sheet material cutting device according to the present invention,
A sheet material cutting device for cutting a sheet material conveyed in the conveyance direction with the 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;
Pressing means for pressing the first blade edge and the second blade edge with each other;
The first unit and the second unit are configured to be relatively displaced in a direction in which the first blade edge and the second blade 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,
One end of the first base part is formed by being bent, and includes the linear first cutting edge extending in the cutting direction and formed at a portion forming the thickness of the metal plate at the one end, the first cutting edge and the first cutting edge A first cutting edge component that forms a first glue accumulation space with one base;
The guide formation which is formed by bending both ends in the cutting direction of the first cutting edge constituent part and includes a guide part continuous with the first cutting edge at a portion forming the thickness of the metal plate on the same side as the first cutting edge. Part.

With the sheet material cutting device according to one aspect of the present invention, the guide unit and the first cutting edge are pressed against the second cutting edge by the pressing means, so that a good cutting operation can be performed. Moreover, since the glue adhering to the first cutting edge can be gradually transferred to the first glue accumulating space each time cutting is repeated, the glue adhering to the first cutting edge can hardly be accumulated on the first cutting edge. Since the glue accumulates in the first glue accumulation space that is not the first cutting edge, cutting failures caused by the glue accumulated in the first blade component are suppressed. Furthermore, the first blade part having the first paste accumulation space and the guide portion can be formed only by simple and easy bending of the metal plate.
For these reasons, there is provided a sheet material cutting device that can form a blade by simple processing and hardly cause cutting failure of the device due to accumulation of glue.

In the sheet material cutting device 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 being bent, and includes a linear second cutting edge extending in the cutting direction formed at a portion forming the thickness of the metal plate at the one end, and the second cutting edge and the second cutting edge You may have the 2nd blade edge | tip structure part which forms the 2nd paste accumulation space between bases.

  According to the sheet material cutting device according to this aspect, the paste accumulation space is provided in both the first unit and the second unit. For this reason, it is possible to make it difficult for the glue to stay on the first blade edge and the second blade edge even when cutting the sheet material with glue attached to the upper surface or the lower surface, and in some cases, both surfaces, and the glue is not the first blade edge or the second blade edge It can be deposited in the first glue deposit space and the second glue deposit space.

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

  According to the sheet material cutting device according to this aspect, the guide forming part is supported not only by the connecting part (the bent part of the metal plate) with the first cutting edge constituent part but also by the holder. For this reason, high mechanical strength is not calculated | required by the connection part of a guide formation part and a 1st blade edge | tip component part, and a guide formation part, and it is easy to comprise a 1st blade part compactly.

In the sheet material cutting device 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 device according to the present aspect, since the pressing means is supported by the housing having a relatively high strength, the pressing means reliably applies a pressing force (pressure contact force) to the first blade part via the holder. Can act.

  According to the present invention, it is possible to provide a blade component that can be formed by simple processing and hardly causes cutting failure of the apparatus due to paste accumulation, and a sheet material cutting apparatus using the blade part.

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

  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. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

  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 in FIGS. 1 and 2, the sheet material cutting device 10 according to the present embodiment cuts the width direction of the sheet material S as the cutting direction Y. 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, the direction is 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.
The cutting direction Y indicates the left-right direction in FIG. The left side in FIG. 1 is referred to as one side Y1 in the cutting direction Y, and the right side in FIG.
The vertical direction Z indicates the vertical direction in FIG. The upper part in FIG. 1 is referred to as an upper part Z1 in the vertical direction Z, and the lower part is referred to as a lower part Z2 in the vertical direction Z.

  The sheet material cutting device 10 includes a first unit 20, a second unit 30, a pressing means 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 the first unit 20 and the second unit 30 therein.

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

  The housing 11 includes a first case 12 and a second case 13. By combining the first case 12 and the second case 13, an accommodation space for accommodating 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 with screws 38.

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

  The first cutting edge constituent part 24 is formed by bending one end of the first base part 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 toward the upstream side X <b> 1 in the transport direction X. The first cutting edge constituent part 24 has a linear first cutting edge 21 formed at a part forming the thickness of the metal plate at one end of the first base part 23. Here, “the part forming the thickness of the metal plate at one end of the first base part 23” is a part (first part) bent to the upstream side X1 in the transport direction X of the first base part 23 in the example shown in FIG. The two cutting surfaces 24a (upper surface) which is the cutting edge component 24) and which becomes the upper side Z1 of the first cutting edge component 24 in the vertical direction Z, and the lower surface Z2 (lower surface) which is the opposite side thereof. The part comprised by the end surface of the metal plate which connects (upper surface and lower surface) is intended. And in the example shown in FIG. 3, the linear 1st blade edge | tip 21 is on 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. 7B).

  A first glue accumulation 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 near side in FIG. 3) that becomes the upstream side X <b> 1 in the transport direction X of the first base 23 and the upper side Z <b> 1 in the vertical direction Z of the first cutting edge component 24. A space formed by the surface 24a (upper surface) is the first paste accumulation space 26.

  The guide forming portion 25 is formed by bending both end portions of the first cutting edge constituting portion 24 in the cutting direction Y. The guide forming portion 25 has a guide portion 27 that is continuous with the first cutting edge 21 at a portion that 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 in the cutting direction Y of the first blade edge constituting portion 24 in opposite directions. In the example shown in FIG. 3, one end of the first blade edge component 24 on the other side Y2 in the cutting direction Y is bent downward Z2 in the up-down direction Z to thereby form one of the guide forming portions 25 (hereinafter, “left guide forming”). Part 25A "). The other end of the guide forming portion 25 (hereinafter referred to as “right guide forming portion 25B”) is formed by bending the end portion on the one side Y1 in the cutting direction Y of the first cutting edge constituent portion 24 upward Z1 in the vertical direction Z. Has been.

  In the following description, the guide portion formed on the left guide formation portion 25A is referred to as a left guide portion 27A, and the guide portion formed on the right guide formation portion 25B is referred to as a right guide portion 27B. When the left guide forming portion 25A and the right guide forming portion 25B are called without distinction, they are called the guide forming portion 25, and when the left guide portion 27A and the right guide forming portion 27B are called without distinction, they are called the guide portion 27. . Details of the left guide portion 27A and the right guide portion 27B will be described later.

  The first blade component 22 is attached to a plate-shaped holder 40 with screws 28. The holder 40 is attached to one surface of the metal plate that constitutes the first base portion 23, which is the side opposite to the first cutting edge 21. The holder 40 is attached to a surface that is the downstream side X2 of the first base portion 23 in the transport direction X (a surface that is not visible from the back side in FIG. 3). The holder 40 is in contact with a portion on the downstream side X2 in the transport direction X that forms the thickness of the metal plate of the guide forming portion 25 (a portion that is not visible on the back side in FIG. 3).

  The second unit 30 has a second blade part 32. The second blade component 32 is formed by bending a metal plate cut or punched into a predetermined shape. The second blade part 32 has a second base portion 33 and a second blade edge constituent portion 34. The second base portion 33 is a plate-like portion extending in the up-down direction Z that intersects the transport direction X.

  The second cutting edge constituent part 34 is formed by bending one end of the second base part 33. In the example shown in FIG. 3, the second cutting edge constituting portion 34 is formed by bending the upper portion in the vertical direction Z of the second base portion 33 toward the downstream side X <b> 2 in the transport direction X. The second cutting edge constituent part 34 has a linear second cutting edge 31 formed at a portion forming the thickness of the metal plate at one end of the second base part 33. Here, “the portion forming the thickness of the metal plate at one end of the second base portion 33” is a portion (second portion) bent to the downstream side X2 in the transport direction X of the second base portion 33 in the example shown in FIG. And the two surfaces (the upper surface) which is the upper edge Z1 of the second blade edge component 34 in the vertical direction Z, and the lower surface Z2 (the lower surface) which is the opposite side (the lower surface). A portion composed of an end surface of a metal plate connecting the upper surface and the lower surface is intended. And in the example shown in FIG. 3, the linear 2nd blade edge | tip 31 is on the linear edge of the corner | angular part of the downstream X2 of the upper surface in the site | part which makes | forms the thickness of the metal plate of one end of this 2nd base 33. It is formed by polishing or the like (see FIG. 7A).

  A second paste accumulation space 36 is formed between the second cutting edge 31 and the second base portion 33. In the example shown in FIG. 3, the lower side Z <b> 2 in the vertical direction Z of the surface (the back side in FIG. 3) of the second base portion 33 that is the downstream side X <b> 2 in the transport direction X and the second blade edge component 34. A space defined between the surface (lower surface) to be the second glue accumulation space 36.

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

  As shown in FIG. 1, the pin 43 is inserted through a long hole 12 a formed in the side plate of the first case 12. The long hole 12 a extends along the up-down direction Z that intersects the transport direction X. As a result, the holder 40 is supported relative to the housing 11 so as to be swingable about an axis along the cutting direction Y of the pin 43 and to be displaceable in the up-down direction Z intersecting the transport direction X.

  As shown in FIG. 2, the holder 40 is driven in the vertical direction Z by the drive mechanism 50. The drive mechanism 50 includes a transmission mechanism 51 including a motor 54 and a gear that can rotate about 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 through the window 41 of the holder 40. The window 41 is sized so that the holder 40 is displaced in the vertical direction Z by the displacement of the drive pin 52, but the holder 40 is not displaced in the cutting direction Y by the displacement of the drive pin 52. For this reason, when the drive pin 52 is rotated around the rotation axis R <b> 1 by the motor 54 via the transmission mechanism 51, the holder 40 is displaced in the vertical direction Z. As a result, 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 leaf springs 46. The pressing means 45 presses the first cutting edge 21 toward the second cutting edge 31 by the elastic force of the leaf 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 leaf 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 so as to be swingable about the axis line along the cutting direction Y with respect to the housing 11, the first cutting edge 21 provided below the pin 43 in the vertical direction Z is moved by the pressing means 45. Pressed by the two cutting edges 31.

  FIG. 4 is a front view of the first blade part 22 and the second blade part 32. As shown in FIG. 4, the first unit 20 and the second unit 30 are arranged so 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. Has been. In the present embodiment, the second blade edge 31 that is not driven is disposed so as to extend in the cutting direction Y that is the horizontal direction, and the first blade edge 21 that is driven is disposed so as 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 tool part 22 drawn with a solid line shows the first tool part 22 at the upper limit position of the stroke of the first unit 20 (see FIG. 2), and the first tool part 22 drawn with a broken line is the first tool part 22. The 1st blade edge | tip structure part 24 and the guide formation part 25 in 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 part 27A, the first cutting edge 21, and the right guide part 27B.

  In the state where the lower end of the first cutting edge 21 is positioned in the upper Z1 in the vertical direction Z with respect to the second cutting edge 31, as shown by the solid line, the positional relationship between the first cutting edge 21 and the second cutting edge 31 is second. The blade edge 31 is pressed by the left guide portion 27A (see the left side in FIG. 4). In the state in which the upper end of the first cutting edge 21 is positioned in the lower Z2 in the vertical direction Z with respect to the second cutting edge 31 as indicated by a broken line, the positional relationship between the first cutting edge 21 and the second cutting edge 31 is second. The blade edge 31 is pressed by the right guide portion 27B (see the right side in FIG. 4).

  The first blade edge 21 and the second blade edge 31 are in an intermediate positional relationship between the case indicated by the solid line and the case indicated by the broken line, and the lower end of the first blade edge 21 is below Z2 in the vertical direction Z with respect to the second blade edge 31 and In a state where the upper end of the first cutting edge 21 is positioned above the second cutting edge 31 in the up-down 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 against 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 blade component 22 is displaced from the upper Z1 to the lower Z2 in the vertical direction Z, the cutting point is changed along the cutting direction Y from the other side Y2 (left side in FIG. 4) to one side Y1 (right side in FIG. 4). Move to).

  Next, the operation when the sheet material S is cut by the sheet material cutting apparatus 10 will be described with reference to FIGS. 2 and 4 as appropriate with reference to FIG. FIG. 5A 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 27 </ b> A of the first blade component 22 is pressed against the second blade edge 31.

  When the drive pin 52 is rotated by the motor 54 from the state of FIG. 5A (see FIG. 2), 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 in the cutting direction Y. Move to Y1 (see FIG. 4). The first unit 20 moves downward Z2 in the vertical direction Z while maintaining a state in which the first cutting edge 21 and the second cutting edge 31 form a predetermined shear angle. Then, the sheet material S is cut along the cutting direction Y from the other side Y2 to the one side Y1. 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 thereafter, from the first cutting edge 21 to the right guide portion 27B (FIG. 5B). See))) Guided smoothly. Thereby, the sheet material S is cut | disconnected favorably by the 1st blade edge | tip 21 and the 2nd blade edge | tip 31 which are mutually pressed and meshed.

  FIG. 5B corresponds to the state indicated by the broken line in FIG. 4 and shows the state of the first unit 20 and the second unit 30 after the sheet material S is cut. As shown in FIG. 5B, after cutting the sheet material S, the right guide portion 27 </ b> B presses against the second cutting edge 31 of the second unit 30. Therefore, while the sheet material S is being cut, the state in which the first blade edge 21 and the second blade edge 31 are pressed and meshed with each other is maintained.

  While the first unit 20 is displaced from the upper limit position of the stroke of the first unit 20 downward Z2 in the vertical direction Z, the left guide portion 27A moves the second cutting edge 31 until the first cutting edge 21 is engaged with the second cutting edge 31. Continuously guide to the first cutting edge 21. While the first unit 20 is displaced from the lower limit position of the stroke of the first unit 20 upward Z1 in the vertical direction Z, the right guide portion 27B moves the second cutting edge 31 until the first cutting edge 21 is engaged with the second cutting edge 31. Continuously guide to the first cutting edge 21. In order to exhibit such a function, the left guide portion 27 </ b> A and the right guide portion 27 </ b> B have a shape that is continuous with the first cutting edge 21.

  The “guide portion 27 continuous with the first blade edge 21” means that one guide portion 27 (left guide) in which the second blade edge 31 pressed by the first blade component 22 is in contact with the standby time (before cutting operation). Part 27A) is moved from the surface of the first cutting edge 21 to the surface of the first cutting edge 21 by a cutting operation, and further, a step or irregularity peculiar to the distance from the surface of the first cutting edge 21 to the surface of the other guide part 27 (right guide part 27B) It refers to an embodiment without. For example, it refers to the guide portion 27 that enables smooth movement without causing a sudden displacement such that the second blade edge 31 is caught by the first blade part 22 or the second blade edge 31 jumps from the first blade part 22. . In addition, the surface of the guide part 27 may be a flat surface or a curved surface. Even if there are convex portions or concave portions on the surface of the guide portion 27, the guide portion 27 can smoothly move the second cutting edge 31 if the degree of change of the surface form (for example, gradient) due to the convex portions or concave portions is sufficiently gradual. Since it can be continuously guided, it can be said to be “a guide portion 27 continuous with the first cutting edge 21”.

  During operation of the sheet material cutting device 10, the second cutting edge 31 is smoothly guided toward the first cutting edge 21 by the guide portion 27. Specifically, when the cutting of the sheet material 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 material S is finished and returned to the standby position. Is guided to the first cutting edge 21 by the right guide portion 27B. At this time, since the second blade edge 31 slides while being pressed and pressed by the guide portion 27, the rapid movement of relative displacement with respect to the first blade component 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 portion 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 always receives a pressing force (pressure contact force) from the second cutting edge 31.

  By the way, when cutting the sheet material S with glue attached to the surface (upper surface) of the upper side Z1 in the vertical direction Z, the surface (see FIG. 3) that becomes the upstream side X1 of the conveying direction X of the first cutting edge component 24 (see FIG. 3). 3, there is a possibility that glue will adhere to the surface of the metal plate on the near side in FIG. The glue adhering to the surface of the first blade edge component 24 that becomes the upstream side X1 in the transport direction X is further moved by the second blade edge 31 as the first unit 20 descends, and the upper surface 24a (first It is pushed up to the surface forming the paste accumulation space 26). When such movement of the glue is repeated, the glue accumulates in the first glue accumulation space 26 formed by the first blade edge component 24 and the first base 23. Since the glue accumulated in the first glue accumulation space 26 is maintained in this state, the glue does not fall on the sheet material S or be caught between the first blade edge 21 and the second blade edge 31. For this reason, the cutting failure of the sheet material cutting device 10 hardly occurs.

  As described above, the first blade component 22 according to the present embodiment includes the guide forming portion 25 having the guide portion 27 continuous with the first blade edge 21. For this reason, the second cutting edge 31 can always be brought into contact with the guide portion 27 of the first blade part 22 or the first cutting edge 21 by the pressing means 45. Thereby, the meshing state of the 1st blade edge | tip 21 and the 2nd blade edge | tip 31 can be formed reliably, and the sheet | seat material cutting device 10 can perform favorable cutting | disconnection operation | movement.

  Further, the glue adhering to the first cutting edge 21 gradually moves from the first cutting edge 21 to the first glue accumulation space 26 every time cutting is repeated. For this reason, the glue attached to the first cutting edge 21 can hardly be deposited on the first cutting edge 21 as it is, and the adhered glue can be deposited in the first glue accumulation space 26. Since the glue accumulates in the first glue accumulation space 26 that is not the first cutting edge 21, cutting defects caused by the glue accumulated in the first blade component 22 are suppressed.

  Furthermore, the first cutter part 22 provided with the guide part 27 that ensures a good cutting operation as described above and the first paste accumulation space 26 that suppresses the cutting failure caused by the glue is simply bent into a metal plate. Can be formed.

  For the reasons described above, a blade part that can be formed by simple processing is provided, and a sheet material cutting device 10 that does not easily cause cutting failure due to paste accumulation 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 give a shear angle, and the first cutting edge 21 and the second cutting edge 31 are intersected to form 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 cutting edge 21 has no guide forming portion, a predetermined opening height (gap between the first cutting edge 21 and the second cutting edge 31) necessary for conveying the sheet material S is set. In order to ensure, the blade span (effective cutting length) which is the dimension of the first blade edge 21 and the second blade edge 31 in the width direction with respect to the width W of the sheet material S must be increased.

  On the other hand, in this embodiment, the guide part 27 formed in the both ends of the cutting direction Y of the 1st blade edge | tip structure part 24 is made to contact | abut to the 2nd blade edge 31. FIG. For this reason, when the second cutting edge 31 contacts the left guide portion 27A on the other side Y2 in the cutting direction Y (see FIG. 4), a predetermined opening height (a gap between the first cutting edge 21 and the second cutting edge 31). In addition, it is possible to reduce the blade span (effective cutting length) of the first blade edge 21 and the second blade edge 31 with respect to the width W of the sheet material S, and it is easy to configure a compact sheet material cutting device 10.

  In the sheet material cutting device 10 according to this embodiment, not only the first unit 20 but also the second unit 30 is provided with a second paste accumulation space 36. For this reason, even if the glue has adhered to either the upper surface or the lower surface of the sheet material S, when cutting the sheet material S, it is difficult to stay on the first blade edge 21 and the second blade edge 31, The glue can be accumulated in the first glue accumulation space 26 and the second glue accumulation space 36 which are not the first blade edge 21 and the second blade 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. The surface of the guide forming portion 25 opposite to the guide portion 27 (the left guide portion 27A and the right guide portion 27B) (the surface on the downstream side X2 in the transport direction X) 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, the force is unlikely to concentrate on the connecting portion (the bent portion of the metal plate) between the guide forming portion 25 and the first cutting edge constituent portion 24. . Therefore, since the mechanical strength is not calculated | required in the connection part of the guide formation part 25 or the 1st blade edge | tip structure part 24 and the guide formation part 25, it is easy to comprise the 1st blade component 22 compactly. Specifically, the height T1 of the guide forming portion 25 can be reduced, and thereby the overall height T2 of the first blade component 22 can be suppressed. Note that the entire guide forming portion 25 may not be supported by the holder 40, and at least a part of the guide forming portion 25 only needs to be supported by the holder 40.

  In the present embodiment, the first cutting edge 21 can be pressed against the second cutting edge 31 with a simple configuration in which the pressing means 45 including the leaf 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 a relatively high strength, the pressing means 45 can reliably apply a pressing force (pressure contact force) to the first blade component 22 via the holder 40.

  In the above-described embodiment, the example in which the first unit 20 includes the blade part having the guide forming part 25 has been described. However, the second unit 30 may be configured to include the blade part having the guide forming part. 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 performed to evaluate the life of the sheet material cutting device 10. The term “lifetime” as used herein refers to an evaluation of the number of times that the sheet material cutting apparatus 10 can cut the sheet material without any trouble in conveying or 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 press molding was selected as the metal plate (blade material) used as the first blade component 22 and the second blade component 32.
As shown in FIGS. 7A and 7B, the thickness of the metal plate was 0.7 mm. The bending raising angle of the second cutting edge 31 of the second cutting tool part 32 was set to 70 °, and the bending raising angle of the first cutting edge 21 of the first cutting tool part 22 was set to 80 °. In the example illustrated in FIG. 7, the bending angle of the first cutting edge 21 and the second cutting edge 31 is set to 70 ° and 80 °, respectively, but the angle is not limited thereto.

  Here, it is preferable to set the bending angle of the first blade edge 21 and the second blade edge 31 in the range of 30 ° or more and 90 °, respectively, which can be formed by simple processing, and causes cutting failure of the apparatus due to accumulation of glue. Hateful. In addition, since the bending raise angle of the 1st blade edge | tip 21 and the 2nd blade edge | tip 31 will each become obtuse and sharpness will worsen if it exceeds 90 degrees, it is preferable to select each as needed. In addition, the smaller the bending angle of the first cutting edge 21 and the second cutting edge 31, the sharper the sharpness and the better the sharpness. However, the space for storing glue in the first glue accumulation space 26 and the second glue accumulation space 36 is small. At the same time, it is considered that the angle (blade edge angle) constituting the blade edge becomes small and damage to the blade edge (blade chipping) is likely to occur. From this first viewpoint, the bending raise angle (lower limit value) of the first cutting edge 21 and the second cutting edge 31 is set to a larger value such as 30 ° or more, 40 ° or more, 50 ° or more, or 60 ° or more. preferable. Further, 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 glue accumulation space 26 and the second glue accumulation space 36. When the glue adhering to 31 becomes difficult to move toward the back side (bending part) of the first glue accumulation space 26 or the second glue accumulation space 36, it becomes easier to deposit at a position close to the first blade edge 21 or the second blade edge 31. Conceivable. From this second viewpoint, 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 smaller, such as 90 ° or less, 80 ° or less, or 70 ° or less. Therefore, the bending raising angles of the first cutting edge 21 and the second cutting edge 31 are combined by setting each angle in the range of 60 ° or more and 80 ° or less, considering the balance between the first viewpoint and the second viewpoint. It is better to select them as needed.

(2) Production of the first blade part 22 and the second blade part 32 A workpiece to be the first blade part 22 and the second blade part 32 is punched from a metal plate by press working.
The workpiece is bent using a mold to form the first blade part 22 and the second blade part 32.
A portion corresponding to the first blade edge 21 and the second blade edge 31 is ground (surface grinding) or polished to form a blade edge. In the first blade component 22, the dimension in the height direction (left and right direction in FIG. 7B) that was 3.2 mm before polishing was set to 3.0 mm. In the 2nd blade part 32, it was 2.5 mm by grind | polishing the dimension of the height direction (left-right direction in FIG. 7A) which was 2.7 mm before grinding | polishing.
Thereafter, deburring is performed on the first blade component 22 and the second blade component 32 as necessary, and non-adhesive coating (fluororesin system) is performed.

(3) Test results A sheet material cutting apparatus was assembled using the first blade part and the second blade part obtained as described above, and the label paper without release paper with glue on one side of the sheet material (total width 85 mm) ) Was selected, and the label paper was cut 450,000 times. In the meantime, the sheet material cutting apparatus 10 did not have a defective conveyance or cutting failure of the label paper.
As described above, according to the sheet material cutting device according to the present embodiment, it was confirmed that even if the sheet material (for example, the above-described label paper) to which glue was attached was cut repeatedly, problems due to adhesion of the glue did not easily occur.

10: sheet material cutting device, 11: housing, 12: first case, 12a: long hole, 13: second case, 14: bracket, 20: first unit, 21: first blade edge, 22: first blade part , 23: first base part, 24: first cutting edge constituent part, 25: guide forming part, 25A: left guide forming part, 25B: right guide forming part, 26: first glue accumulation space, 27: guide part, 27A: Left guide part, 27B: Right guide part, 28: Screw, 30: Second unit, 31: Second blade edge, 32: Second blade part, 33: Second base part, 34: Second blade edge component part, 36: First Double paste accumulation space, 38: screw, 40: holder, 41: window, 42: support piece, 43: pin, 45: pressing 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)

A blade part made of a metal plate,
The base,
A blade edge configuration in which one end of the base portion is formed by being bent, and includes a linear blade edge formed at a portion forming the thickness of the metal plate at the one end, and forming a paste accumulation space between the blade edge and the base portion And
Both ends of the cutting edge component in the direction along the cutting edge are bent and formed, and the guide forming section includes a guide section continuous with the cutting edge at a portion forming the thickness of the metal plate on the same side as the cutting edge. Cutlery parts. A sheet material cutting device for cutting a sheet material conveyed in the conveyance direction with the 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;
Pressing means for pressing the first blade edge and the second blade edge with each other;
The first unit and the second unit are configured to be relatively displaced in a direction in which the first blade edge and the second blade 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,
One end of the first base part is formed by being bent, and includes the linear first cutting edge extending in the cutting direction and formed at a portion forming the thickness of the metal plate at the one end, the first cutting edge and the first cutting edge A first cutting edge component that forms a first glue accumulation space with one base;
The guide formation which is formed by bending both ends in the cutting direction of the first cutting edge constituent part and includes a guide part continuous with the first cutting edge at a portion forming the thickness of the metal plate on the same side as the first cutting edge. A sheet material cutting device having a section. 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 being bent, and includes a linear second cutting edge extending in the cutting direction formed at a portion forming the thickness of the metal plate at the one end, and the second cutting edge and the second cutting edge The sheet | seat material cutting device of Claim 2 which has a 2nd blade edge | tip structure part which forms a 2nd paste accumulation space between bases.   The sheet material cutting device according to claim 2 or 3, wherein at least a part of the guide forming portion is supported by a holder attached to the first base portion. 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.

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