Cutting device and cutting device control method

Abstract

To eliminate the need for an operator to remove chips without increasing manufacturing costs.SOLUTION: A cutting device 100 comprises: a movement mechanism 40 which moves a tip 10a of an upper blade 10; a recovery part 50 which recovers chips C; a first nozzle part 60 which injects air toward the tip 10a of the upper blade 10; a second nozzle part 70 which injects air toward an inclined face 51 of the recovery part 50; an air supply part 80 which supplies air to the first nozzle part 60 or the second nozzle part 70; and a switching part 90 which performs switching between a first state that the air supply part 80 supplies air to the first nozzle part 60 and does not supply air to the second nozzle part 70 and a second state that the air supply part 80 supplies air to the second nozzle part 70 and does not supply air to the first nozzle part 60. The switching part 90 switches the first state and the second state so as to become the first state when the upper blade 10 exists at a cutting position and become the second state when the upper blade 10 exists at a non-cutting position.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a cutting device and a method for controlling the cutting device. [Background technology]

[0002] Conventionally, a cutting device that cuts the fore-edge portion of a bound material is known (see, for example, Patent Document 1). Patent Document 1 discloses that the fore-edge portion of the bound material is cut by moving a cutting blade toward the bound material supplied to a cutting position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-53779 Summary of the Invention [Problem to be solved by the invention]

[0004] Since cutting a bound material generates cutting chips, it is necessary to separate the cutting chips adhering to the cutting blade from the cutting blade and collect the cutting chips. For example, a configuration may be used in which air or the like is sprayed onto the cutting chips adhering to the cutting blade to separate the cutting chips from the cutting blade. In addition, a configuration may be used in which an inclined surface is provided below the cutting blade to allow the cutting chips to fall toward a collection section in order to collect the cutting chips.

[0005] However, there are cases where the chips that fall below the cutting blade do not fall along the inclined surface but are instead partially piled up, and in such cases, for example, an operator is required to guide the chips toward a collection section. In addition, in order to eliminate the need for an operator to remove the chips, it is effective to periodically spray air from above to below along the inclined surface, but this requires a new structure for spraying air in addition to the structure for spraying the air that has adhered to the cutting blade, which increases manufacturing costs.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a cutting device and a control method for a cutting device that eliminates the need for workers to remove cutting chips without increasing manufacturing costs. [Means for solving the problem]

[0007] A cutting device according to one aspect of the present invention includes a first blade, a second blade fixed at a predetermined position, a movement mechanism that moves a tip of the first blade between a non-cutting position spaced apart from the second blade and a cutting position where the first blade has passed the second blade, a collection unit that collects scraps of a stack of paper cut in response to the first blade moving from the non-cutting position to the cutting position and has an inclined surface that is inclined relative to a horizontal direction, a first nozzle unit that sprays gas toward the tip of the first blade that has moved to the cutting position, and a second nozzle unit that sprays gas from above to below the inclined surface. the gas supply unit supplies gas to the first nozzle portion or the second nozzle portion, and a switching unit switches between a first state in which the gas supply unit supplies gas to the first nozzle portion but does not supply gas to the second nozzle portion and a second state in which the gas supply unit supplies gas to the second nozzle portion but does not supply gas to the first nozzle portion, wherein the switching unit switches between the first state and the second state so that the first state is reached when the first blade is in the cutting position and the second state is reached when the first blade is in the non-cutting position.

[0008] According to one aspect of the present invention, when the first blade is in the cutting position, the cutting device is in a first state in which gas is supplied from the gas supply unit to the first nozzle unit while gas is not supplied to the second nozzle unit. Therefore, the entire amount of gas supplied by the gas supply unit can be sprayed toward the tip of the first blade to separate chips attached to the first blade or the second blade.

[0009] Furthermore, according to the cutting device according to one aspect of the present invention, when the first blade is in the non-cutting position, a second state is established in which gas is supplied from the gas supply unit to the second nozzle unit while gas is not supplied to the first nozzle unit. Therefore, the entire amount of gas supplied by the gas supply unit can be sprayed downward from above the inclined surface to move the chips accumulated on the inclined surface.

[0010] According to the cutting device of one aspect of the present invention, the supply destination of the gas supplied from the single gas supply unit can be appropriately switched to the first nozzle unit or the second nozzle unit depending on whether the first blade is in the cutting position or the non-cutting position, which makes it possible to eliminate the need for an operator to remove the cutting chips without increasing the manufacturing cost.

[0011] In a cutting device according to one aspect of the present invention, the gas supply unit includes a blower unit and a gas flow path that guides the gas supplied from the blower unit to the first nozzle unit or the second nozzle unit, and the switching unit has a valve body portion arranged in the gas flow path, and the valve body portion is arranged in a first position in which, in the first state, the gas introduced from the gas supply unit to the gas flow path is guided to the first nozzle unit but not to the second nozzle unit, and in the second state, the valve body portion is arranged in a second position in which, in the second state, the gas introduced from the gas supply unit to the gas flow path is guided to the second nozzle unit but not to the first nozzle unit.

[0012] In the cutting device having the above configuration, the valve body portion may be connected to the first blade or a fixed member to which the first blade is fixed via a connecting member, and may be disposed at the first position when the first blade is in the cutting position, and may be disposed at the second position when the first blade is in the non-cutting position.

[0013] According to the cutting device of this aspect, the valve body is connected to the first blade or to a fixed member to which the first blade is fixed via a connecting member. Therefore, the valve body moves between the first position and the second position in conjunction with the movement of the first blade between the cutting position and the non-cutting position by the moving mechanism. Therefore, the valve body can be moved between the first position and the second position without providing another mechanism in addition to the moving mechanism that moves the first blade.

[0014] In the cutting device having the above configuration, the switching unit may have a switching mechanism that switches the position of the valve body unit, and the switching mechanism may move the valve body unit so that the valve body unit is positioned at the first position when the first blade is in the cutting position, and move the valve body unit so that the valve body unit is positioned at the second position when the first blade is in the non-cutting position.

[0015] According to the cutting device of this aspect, the valve body portion is moved between the first position and the second position by the switching mechanism in conjunction with the movement of the first blade between the cutting position and the non-cutting position by the moving mechanism. Therefore, the supply destination of the air supplied from the single gas supply portion can be appropriately switched to the first nozzle portion or the second nozzle portion depending on whether the first blade is in the cutting position or the non-cutting position.

[0016] In a cutting device according to one embodiment of the present invention, the first blade and the second blade are arranged to extend along a first direction which is a horizontal direction, and the first nozzle portion may be configured to inject gas toward a portion of the entire area in the first direction in which the first blade is arranged, and not to inject gas into other areas.

[0017] According to the cutting device of this configuration, the gas guided to the first nozzle section is sprayed toward a portion of the entire area in the first direction in which the first blade is positioned, so that the gas speed is increased compared to when the gas is sprayed toward the entire area, and cutting chips adhering to the first blade or the second blade can be reliably separated.

[0018] In a cutting device according to one embodiment of the present invention, the first blade and the second blade are arranged to extend along a first direction which is a horizontal direction, and the second nozzle portion may be configured to spray gas toward the entire area in the first direction in which the second blade is arranged.

[0019] According to the cutting device of this configuration, the gas guided to the second nozzle section is sprayed toward the entire area in the first direction in which the second blade is positioned, so that no matter where in the entire area in the first direction the cutting chips have accumulated, they can be reliably moved from the top to the bottom of the inclined surface.

[0020] In a method for controlling a cutting device according to one aspect of the present invention, the cutting device includes a first blade, a second blade fixed at a predetermined position, a movement mechanism for moving a tip of the first blade between a non-cutting position spaced apart from the second blade and a cutting position where the first blade has passed the second blade, a collection unit for collecting scraps of a stack of paper cut in response to the first blade moving from the non-cutting position to the cutting position and having an inclined surface inclined relative to a horizontal direction, a first nozzle unit for spraying gas toward the tip of the first blade that has moved to the cutting position, and a second nozzle unit for spraying gas from above to below the inclined surface. the gas supply unit supplies gas to the first nozzle portion or the second nozzle portion, and a switching unit switches between a first state in which the gas supply unit supplies gas to the first nozzle portion and does not supply gas to the second nozzle portion and a second state in which the gas supply unit supplies gas to the second nozzle portion and does not supply gas to the first nozzle portion, and includes a control process for controlling the switching unit to switch between the first state and the second state so that the first state is reached when the first blade is in the cutting position and the second state is reached when the first blade is in the non-cutting position.

[0021] According to a method for controlling a cutting device according to an aspect of the present invention, when the first blade is in the cutting position, a first state is established in which gas is supplied from the gas supply unit to the first nozzle unit while gas is not supplied to the second nozzle unit, and therefore all of the gas supplied by the gas supply unit can be sprayed toward the tip of the first blade to separate chips adhering to the first blade or the second blade.

[0022] According to a method for controlling a cutting device according to an aspect of the present invention, when the first blade is in a non-cutting position, a second state is established in which gas is supplied from the gas supply unit to the second nozzle unit while gas is not supplied to the first nozzle unit. Therefore, the entire amount of gas supplied by the gas supply unit can be sprayed downward from above the inclined surface to move the chips accumulated on the inclined surface.

[0023] According to the method for controlling the cutting device according to one aspect of the present invention, the supply destination of the gas supplied from the single gas supply unit can be appropriately switched to the first nozzle unit or the second nozzle unit depending on whether the first blade is in the cutting position or the non-cutting position, which makes it possible to eliminate the need for an operator to remove the cutting chips without increasing the manufacturing cost. Effect of the Invention

[0024] According to the present disclosure, it is possible to provide a cutting device and a control method for a cutting device that can eliminate the need for an operator to remove cutting chips without increasing manufacturing costs. [Brief description of the drawings]

[0025] [Figure 1] FIG. 2 is a side view showing the cutting device according to the embodiment of the present invention, illustrating a state in which the upper blade is in a non-cutting position. [Diagram 2] FIG. 2 is a side view showing the cutting device according to the embodiment of the present invention, illustrating a state in which the upper blade is in a cutting position. [Diagram 3] 2 is a cross-sectional view of the cutting device shown in FIG. 1 taken along the line AA. [Figure 4] 3 is a cross-sectional view of the cutting device shown in FIG. 2 taken along the line BB. [Diagram 5] 4 is a cross-sectional view of the cutting device shown in FIG. 3 taken along the line CC. [Figure 6] 5 is a cross-sectional view of the cutting device shown in FIG. 4 taken along the line DD. [Figure 7] 5 is a flowchart illustrating the operation of a cutting process executed by the cutting device of the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] A cutting device 100 according to an embodiment of the present invention will be described with reference to the drawings. Arrows in each drawing indicate the flow direction of air supplied from an air supply unit 80.

[0027] Fig. 1 is a side view of a cutting device 100 according to an embodiment of the present invention, showing a state in which an upper blade 10 is in a non-cutting position. Fig. 2 is a side view of a cutting device 100 according to an embodiment of the present invention, showing a state in which an upper blade 10 is in a cutting position.

[0028] As shown in Figures 1 and 2, the cutting device 100 of this embodiment includes an upper blade (first blade) 10, a lower blade (second blade) 20 fixed at a predetermined position in the vertical direction VD, a fixed member 30 to which the upper blade 10 is fixed, a moving mechanism 40, a collection section 50 that collects cutting chips C of the paper stack S, a first nozzle section 60, a second nozzle section 70, an air supply section (gas supply section) 80, a switching section 90, a control section 95, a first conveyor belt CB1, and a second conveyor belt CB2.

[0029] The moving mechanism 40 is a mechanism that moves the upper blade 10 along the vertical direction VD between a non-cutting position (see FIG. 1) spaced apart from the lower blade 20 and a cutting position (see FIG. 2) past the lower blade 20. The moving mechanism 40 moves the fixed member 30 along the vertical direction VD, thereby moving the upper blade 10 fixed to the fixed member 30 along the vertical direction VD. The control unit 95 transmits a movement command to the moving mechanism 40, causing the moving mechanism 40 to move the upper blade 10 along the vertical direction VD between the non-cutting position and the cutting position.

[0030] The collection section 50 collects scraps C of the paper stack S cut in response to the upper blade 10 moving from the non-cutting position to the cutting position. The collection section 50 has an inclined surface 51 inclined at an inclination angle θ with respect to the horizontal direction HD.

[0031] The first nozzle unit 60 is a device that injects air (gas) toward the tip 10a of the upper blade 10 that has moved to the cutting position. The second nozzle section 70 is a device that jets air from above toward below the inclined surface 51 of the collection section 50. The air supply unit 80 is a device that supplies air to the first nozzle unit 60 or the second nozzle unit 70.

[0032] The switching unit 90 is a device that switches between a first state (the state shown in Figure 2) in which the air supply unit 80 supplies air to the first nozzle section 60 but does not supply air to the second nozzle section 70, and a second state (the state shown in Figure 1) in which the air supply unit 80 supplies air to the second nozzle section 70 but does not supply air to the first nozzle section 60.

[0033] The switching unit 90 switches the air supply state to a first state when the upper blade 10 is in the cutting position (the state shown in FIG. 2), and switches the air supply state to a second state when the upper blade 10 is in the non-cutting position (the state shown in FIG. 1).

[0034] The first conveyor belt CB1 and the second conveyor belt CB2 are devices that transport the sheet stack S along the transport direction TD. The first conveyor belt CB1 and the second conveyor belt CB2 operate in response to a transport command transmitted from the control unit 95, and transport the sheet stack S to a predetermined position shown in Fig. 1 and stop it. The predetermined position shown in Fig. 1 is the position where the edge of the sheet stack S is cut by the tip 10a of the upper blade 10. The second conveyor belt CB2 operates in response to a transport command transmitted from the control unit 95, and transports the sheet stack S whose edge has been cut by the upper blade 10 and the lower blade 20, and discharges it to the outside.

[0035] Next, the air supply unit 80 and the switching unit 90 will be described in detail with reference to Figures 3 and 4. As shown in Figure 3, the air supply unit 80 has an air blower 81, an air flow path (gas flow path) 82, an upper air flow path 83, and a lower air flow path 84. As shown in Figures 1 and 2, the switching unit 90 has a valve body portion 91 arranged in the air flow path 82, and a connecting member 92 that connects the valve body portion 91 and the upper blade 10.

[0036] The valve body 91 is connected to the upper blade 10 by a connecting member 92, and therefore moves between a first position shown in Fig. 4 and a second position shown in Fig. 3 as the moving mechanism 40 moves the upper blade 10 in the vertical direction VD between the cutting position (see Fig. 2) and the non-cutting position (see Fig. 1). The valve body 91 is disposed at the first position when the upper blade 10 is in the cutting position, and is disposed at the second position when the upper blade 10 is in the non-cutting position.

[0037] 1 and 2, the connecting member 92 connects the valve body 91 and the upper blade 10, but other configurations are also possible. For example, the connecting member 92 may connect the valve body 91 and the fixing member 30 to which the upper blade 10 is fixed.

[0038] 4, in a first state in which the air supply unit 80 supplies air to the first nozzle unit 60 but does not supply air to the second nozzle unit 70, the valve body unit 91 is disposed at a first position where it guides air introduced from the blower unit 81 to the air flow path 82 through the upper air flow path 83 to the first nozzle unit 60. The valve body unit 91 disposed at the first position does not guide the air introduced from the blower unit 81 to the air flow path 82 to the second nozzle unit 70 through the lower air flow path 84.

[0039] 3, in a second state in which the air supply unit 80 supplies air to the second nozzle unit 70 but does not supply air to the first nozzle unit 60, the valve body unit 91 is disposed at a second position where it guides the air introduced from the blower unit 81 to the air flow path 82 to the second nozzle unit 70 via the lower air flow path 84. The valve body unit 91 disposed at the second position does not guide the air introduced from the blower unit 81 to the air flow path 82 to the first nozzle unit 60 via the upper air flow path 83.

[0040] As shown in Figures 3 and 4, the upper blade 10 and the lower blade 20 are disposed so as to extend along a first direction DR1, which is a horizontal direction. Here, with reference to Figures 5 and 6, the area in the first direction DR1 to which the first nozzle section 60 and the second nozzle section 70 inject air will be described. Figure 5 is a cross-sectional view of the cutting device 100 shown in Figure 3 taken along the CC arrow. Figure 6 is a cross-sectional view of the cutting device shown in Figure 4 taken along the DD arrow.

[0041] As shown in Fig. 5, the second nozzle section 70 injects air toward the entire area in the first direction DR1 in which the upper blade 10 and the lower blade 20 are disposed. Here, the entire area in the first direction DR1 refers to the entire area from position P1 to position P6 along the first direction DR1 shown in Fig. 5. The lower air flow path 84 is partially partitioned by a plurality of partition plates 84a into five areas along the first direction DR1 (an area from position P1 to position P2, an area from position P2 to position P3, an area from position P3 to position P4, an area from position P4 to position P5, and an area from position P5 to position P6).

[0042] The air supplied from the blower 81 to the air flow passage 82 is guided to the lower air flow passage 84 by the valve body 91, and the air is guided to each position along the first direction DR1 at a substantially uniform flow rate. The air guided to the lower air flow passage 84 is sprayed from the second nozzle 70 toward the inclined surface 51 of the collection section 50.

[0043] As shown in Fig. 6, the first nozzle section 60 injects air toward a portion of the entire region in the first direction DR1 in which the upper blade 10 and the lower blade 20 are disposed. Here, the portion of the entire region in the first direction DR1 refers to the region from position P1 to position P2, the region from position P3 to position P4, and the region from position P5 to position P6 along the first direction DR1 shown in Fig. 6. The upper air flow path 83 is partitioned by multiple partition plates 83a into three regions (the region from position P1 to position P2, the region from position P3 to position P4, and the region from position P5 to position P6) along the first direction DR1.

[0044] The air supplied from the blower 81 to the air flow passage 82 is guided by the valve body 91 to the upper air flow passage 83 and then to three nozzles, namely nozzle 61, nozzle 62, and nozzle 63, of the first nozzle section 60. The air guided to nozzle 61, nozzle 62, and nozzle 63 is sprayed toward a part of the entire area in the first direction DR1 where the upper blade 10 is arranged.

[0045] Next, the operation of the cutting process executed by the cutting device 100 of this embodiment will be described with reference to Fig. 7. Fig. 7 is a flowchart illustrating the operation of the cutting process executed by the cutting device of this embodiment.

[0046] In step S101, the control unit 95 controls the first conveyor belt CB1 and the second conveyor belt CB2 to transport the sheet stack S to a predetermined position shown in FIG. 1 and stop it.

[0047] In step S102 (control step), the control unit 95 controls the movement mechanism 40 to move the upper blade 10 from the non-cutting position to the cutting position in order to cut the edge of the paper stack S stopped at a predetermined position. When the upper blade 10 moves from above to below in the vertical direction VD in step S102 and reaches the cutting position, it enters the state shown in Fig. 2. When the upper blade 10 is in the cutting position, the air supply unit 80 enters a first state in which it supplies air to the first nozzle unit 60 and does not supply air to the second nozzle unit 70.

[0048] In step S103 (control step), since the edge of the paper stack S has been cut, the control unit 95 controls the movement mechanism 40 to move the upper blade 10 from the cutting position to the non-cutting position. When the upper blade 10 moves from below to above in the vertical direction VD in step S103 and reaches the non-cutting position, it enters the state shown in Fig. 1. When the upper blade 10 is in the non-cutting position, the air supply unit 80 enters a second state in which it supplies air to the second nozzle unit 70 and does not supply air to the first nozzle unit 60.

[0049] In step S104, the control unit 95 controls the second conveyor belt CB2 to transport the sheet stack S, whose edges have been cut, from a predetermined position shown in FIG. 1 along the transport direction TD and discharge it to the outside.

[0050] In step S105, the control section 95 judges whether or not to continue the cutting process of the subsequent other sheet stack S. If YES, the process proceeds to step S101, and if NO, the process of this flow chart is terminated.

[0051] The actions and effects of the cutting device 100 of the present embodiment described above will be described. According to the cutting device 100 of this embodiment, a switching unit 90 switches between a first state in which the air supply unit 80 supplies air to the first nozzle unit 60 but does not supply air to the second nozzle unit 70, and a second state in which the air supply unit 80 supplies air to the second nozzle unit 70 but does not supply air to the first nozzle unit 60. The switching unit 90 switches between the first state and the second state so that the first state is set when the upper blade 10 is in the cutting position, and the second state is set when the upper blade 10 is in the non-cutting position.

[0052] According to the cutting device 100 of this embodiment, when the upper blade 10 is in the cutting position, a first state is established in which air is supplied from the air supply unit 80 to the first nozzle unit 60, but air is not supplied to the second nozzle unit 70. Therefore, the entire amount of air supplied by the air supply unit 80 can be sprayed toward the tip of the upper blade 10, so that the cutting chips C adhering to the upper blade 10 or the lower blade 20 can be separated.

[0053] Furthermore, according to the cutting device 100 of this embodiment, when the upper blade 10 is in the non-cutting position, a second state is established in which air is supplied from the air supply unit 80 to the second nozzle unit 70 while air is not supplied to the first nozzle unit 60. Therefore, the entire amount of air supplied by the air supply unit 80 can be sprayed downward from above the inclined surface 51 to move the chips C accumulated on the inclined surface 51.

[0054] According to the cutting device 100 of this embodiment, the destination of the air supplied from the single air supply unit 80 can be appropriately switched to the first nozzle unit 60 or the second nozzle unit 70 depending on whether the upper blade 10 is in the cutting position or the non-cutting position. Therefore, it is possible to eliminate the need for an operator to remove the cutting chips without increasing the manufacturing cost.

[0055] According to the cutting device 100 of this embodiment, by positioning the valve body portion 91 arranged in the air supply flow path 82 at a first position, a first state can be achieved in which air is supplied from the air supply portion 80 to the first nozzle portion 60 while air is not supplied to the second nozzle portion 70, and by positioning the valve body portion 91 arranged in the air supply flow path 82 at a second position, a second state can be achieved in which air is supplied from the air supply portion 80 to the second nozzle portion 70 while air is not supplied to the first nozzle portion 60.

[0056] According to the cutting device 100 of this embodiment, the valve body portion 91 is connected to the upper blade 10 or the fixed member 30 to which the upper blade 10 is fixed via a connecting member 92. Therefore, the valve body portion 91 moves between the first position and the second position in conjunction with the movement of the upper blade 10 between the cutting position and the non-cutting position by the movement mechanism 40. Therefore, the valve body portion 91 can be moved between the first position and the second position without providing another mechanism in addition to the movement mechanism 40 that moves the upper blade 10.

[0057] According to the cutting device 100 of this embodiment, the valve body portion 91 is moved between the first position and the second position by the switching portion 90 in conjunction with the movement of the upper blade 10 between the cutting position and the non-cutting position by the moving mechanism 40. Therefore, the supply destination of the air supplied from the single air supply portion 80 can be appropriately switched to the first nozzle portion 60 or the second nozzle portion 70 depending on whether the upper blade 10 is in the cutting position or the non-cutting position.

[0058] According to the cutting device 100 of this embodiment, the air guided to the first nozzle section 60 is sprayed toward a portion of the entire area of ​​the first direction DR1 in which the upper blade 10 is positioned, so that the air speed is increased compared to when the air is sprayed toward the entire area, and cutting chips adhering to the upper blade 10 or lower blade 20 can be reliably separated.

[0059] According to the cutting device 100 of this embodiment, the air guided to the second nozzle section 70 is sprayed toward the entire area of ​​the first direction DR1 in which the lower blade 20 is positioned, so that no matter where in the entire area of ​​the first direction DR1 the cutting chips C have accumulated, they can be reliably moved from above to below the inclined surface 51.

[0060] Other Embodiments In the above description, the switching unit 90 has the connecting member 92 that connects the valve body 91 and the upper blade 10, and the valve body 91 moves between the first position and the second position in conjunction with the movement of the upper blade 10 between the cutting position and the non-cutting position, but other configurations are also possible. For example, the switching unit 90 may be provided with a switching mechanism (not shown) that switches the position of the valve body 91 between the first position and the second position, instead of the connecting member 92.

[0061] In this case, the switching mechanism moves the valve body portion 91 in response to an instruction from the control unit 95 so that the valve body portion 91 is located at the first position when the upper blade 10 is in the cutting position. Also, the switching mechanism moves the valve body portion 91 in response to an instruction from the control unit 95 so that the valve body portion 91 is located at the second position when the upper blade 10 is in the non-cutting position. [Explanation of symbols]

[0062] 10 Upper blade (1st blade) 10a Tip 20 Lower blade (2nd blade) 30 Fixing member 40 Moving mechanism 50 Collection Department 51 Slope 60 First nozzle section 61,62,63 Nozzle 70 Second nozzle section 80 Air supply section 81 Blower 82 Air flow path (gas flow path) 83 Upper air passage (gas passage) 83a, 84a Partition plate 84 Lower air passage (gas passage) 90 Switching section 91 Valve body 92 Connecting members 95 Control Unit 100 Cutting device C. Chips CB1 First conveyor belt CB2 Second conveyor belt DR1 1st direction HD horizontal S paper stack TD Transport direction VD Vertical direction θ Tilt angle

Claims

1. A first blade; A second blade fixed in position; a moving mechanism that moves a tip of the first blade between a non-cutting position spaced apart from the second blade and a cutting position past the second blade; a collection section that collects scraps of the paper stack cut in response to the first blade moving from the non-cutting position to the cutting position and has an inclined surface inclined with respect to a horizontal direction; a first nozzle portion that injects gas toward a tip of the first blade that has moved to the cutting position; A second nozzle portion that injects gas from above to below the inclined surface; a gas supply unit that supplies a gas to the first nozzle unit or the second nozzle unit; a switching unit that switches between a first state in which the gas supply unit supplies gas to the first nozzle unit and does not supply gas to the second nozzle unit, and a second state in which the gas supply unit supplies gas to the second nozzle unit and does not supply gas to the first nozzle unit, The switching unit is a cutting device that switches between the first state and the second state such that the first blade is in the first state when the first blade is in the cutting position and the second state when the first blade is in the non-cutting position.

2. the gas supply unit has a blower unit and a gas flow path that guides the gas supplied from the blower unit to the first nozzle unit or the second nozzle unit, The switching unit has a valve body portion disposed in the gas flow path, 2. The cutting device according to claim 1, wherein the valve body is disposed at a first position in which, in the first state, the gas introduced from the gas supply unit into the gas flow path is guided to the first nozzle unit but not to the second nozzle unit, and is disposed at a second position in which, in the second state, the gas introduced from the gas supply unit into the gas flow path is guided to the second nozzle unit but not to the first nozzle unit.

3. The cutting device according to claim 2, wherein the valve body portion is connected to the first blade or a fixed member to which the first blade is fixed via a connecting member, and is disposed at the first position when the first blade is in the cutting position, and is disposed at the second position when the first blade is in the non-cutting position.

4. The switching unit has a switching mechanism for switching the position of the valve body unit, The cutting device according to claim 2, wherein the switching mechanism moves the valve body portion so that the valve body portion is positioned at the first position when the first blade is in the cutting position, and moves the valve body portion so that the valve body portion is positioned at the second position when the first blade is in the non-cutting position.

5. The first blade and the second blade are disposed to extend along a first direction which is a horizontal direction, The cutting device according to claim 1 or claim 2, wherein the first nozzle portion injects gas toward a portion of an entire area in the first direction in which the first blade is disposed, and does not inject gas toward other areas.

6. the first blade and the second blade are disposed to extend along the first direction, The cutting device according to claim 5 , wherein the second nozzle unit injects gas toward an entire area in the first direction where the second blade is disposed.

7. A method for controlling a cutting device, comprising the steps of: The cutting device is A first blade; A second blade fixed in position; a moving mechanism that moves a tip of the first blade between a non-cutting position spaced apart from the second blade and a cutting position past the second blade; a collection section that collects scraps of the paper stack cut in response to the first blade moving from the non-cutting position to the cutting position and has an inclined surface inclined with respect to a horizontal direction; a first nozzle portion that injects gas toward a tip of the first blade that has moved to the cutting position; A second nozzle portion that injects gas from above to below the inclined surface; a gas supply unit that supplies a gas to the first nozzle unit or the second nozzle unit; a switching unit that switches between a first state in which the gas supply unit supplies gas to the first nozzle portion and does not supply gas to the second nozzle portion and a second state in which the gas supply unit supplies gas to the second nozzle portion and does not supply gas to the first nozzle portion, A control method for a cutting device, comprising a control step of controlling the switching unit to switch between the first state and the second state so that the first blade is in the first state when it is in the cutting position and the second state when the first blade is in the non-cutting position.

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