Cutting device and cutting method

Abstract

To provide a cutting device and a cutting method capable of reducing damages to the contents in a box body when cutting a band wrapped around the box body.SOLUTION: A cutting device 1 cuts a band 11 wrapped around a box body 10. The cutting device 1 has a pressing part 22 that presses against the top surface 10A of the box body 10 to recess the top surface 10 downward and form a gap 11a between the band 11 and the top surface 10A, and a cutting part 21 that cuts the band 11 at the portion of the gap 11a formed by the pressing part 22. The cutting part 21 has a rotary blade 24 that cuts the band 11, and a protective part 25 that is inserted into the gap 11a and prevents the rotary blade 24 from coming into contact with the box body 10. When cutting the band 11 with the cutting device 1, the rotary blade 24 cuts the band 11 with the protective part 25 inserted into the gap 11a.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a cutting device and a cutting method, and more particularly to a cutting device and a cutting method for cutting a box body around which a band is wound. [Background technology]

[0002] A cutting device for cutting cable ties wrapped around a cardboard case has been known for some time (see Patent Document 1). In the cutting device, a cardboard case on a roller conveyor is clamped from the left and right by clamping pieces, and then the bottom wall of the cardboard case is pushed up by a case bottom wall pushing-up piece. A predetermined space is formed between the bottom wall and the cable ties, and the cable tie cutter is raised and moved horizontally to cut the cable ties. This allows the cable ties wrapped around the case to be automatically cut without damaging the case.

[0003] In another band cutting and recovery device, the unit movement means is driven to move the cutting unit close to the side of the laminated sheet and move the cutting unit parallel to a position facing the band wrapped around the laminated sheet. The arm movement means is driven to clamp and pull the band wrapped around the laminated sheet with the clamping arms, and the band is cut with the cutter of the cutting unit while still separated from the laminated sheet. The band immediately after cutting is clamped and pulled between the feed roller and pressure roller, cut into short lengths with the rotary blade and fixed blade, and recovered in a recovery box. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-8927 [Patent Document 2] Japanese Utility Model Application Publication No. 4-89718 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the cutting device in Patent Document 1 requires the cardboard case to be clamped and lifted by clamping pieces, which increases the size of the cutting device and manufacturing costs. Also, clamping the cardboard case from the left and right with enough strength to lift it could deform the cardboard case. Furthermore, because the cable tie cutter is raised to cut the cable ties on the bottom wall, there is a possibility that the bottom wall of the cardboard case could be damaged depending on the raised position of the cable tie cutter.

[0006] In the band cutting and recovery device described in Patent Document 2, the band is pulled and cut with a clamping arm, which can damage the laminated sheet when the band is pulled. Also, the cut band is clamped and transported between rollers, which requires multiple sensors, drive mechanisms, motors, etc., resulting in high manufacturing costs.

[0007] The cutting device of Patent Document 1 may leak contents when clamping the cardboard case from both sides, depending on the contents, making it difficult to apply to boxes containing liquids, powders, viscous fluids, etc. Furthermore, the band cutting and recovery device of Patent Document 2 uses a clamping arm to pull the band, which may damage the laminated sheet when the clamping arm's pressure plate is inserted between the laminated sheet and the band, making it difficult to apply to boxes containing liquids, powders, viscous fluids, etc. For these reasons, even slight damage to boxes containing bags filled with liquids, etc., can cause the contents to leak, so many work sites manually cut the bands. However, due to the poor workability of opening the box and the risk of damage to the box and contents leaking, there was a need for a cutting device that could cut and recover the bands without damaging the contents.

[0008] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a cutting device and a cutting method that can reduce damage to the contents of a box when cutting a band wrapped around the box. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides a cutting device for cutting a band wrapped around a box body, characterized in that it has a pressing section that presses against a target surface of the box body, thereby recessing the target surface in the pressing direction and forming a gap between the band and the target surface, and a cutting section that cuts the band in the portion of the gap formed by the pressing section.

[0010] Furthermore, the cutting portion has a protective portion that is inserted into the gap and a cutter portion that cuts the band, and when the cutting portion cuts the band, it is preferable that the protective portion is positioned in the gap and the cutter portion cuts the band from the side opposite to the side on which the protective portion is positioned.

[0011] It is also preferable that the device further has a conveying section that conveys the box body in the conveying direction, and the pressing section is provided upstream of the cutting section in the conveying direction, and further has a conveying section that conveys the box body in the conveying direction, and an avoidance mechanism that is provided in the cutting section and activates when it comes into contact with an approach surface that is perpendicular to the target surface and located downstream in the conveying direction, thereby preventing the cutting section from getting caught on the approach surface and guiding it to the target surface.

[0012] It is also preferable that the device further includes a moving unit that moves the pressing unit and the cutting unit to bring the pressing unit into contact with the target surface, the pressing unit having a roller, the roller rotating on the target surface when brought into contact with the target surface by the moving unit, and the moving unit moving the pressing unit and the cutting unit so that the roller comes into contact with the band.

[0013] According to another aspect of the present invention, there is provided a cutting method for cutting a box body around which a band is wrapped, comprising the steps of: pressing a target surface of the box body to recess the target surface in the pressing direction, thereby forming a gap between the band and the target surface; and cutting the band in the portion of the formed gap. [Effects of the Invention]

[0014] With this configuration, the cutting part cuts the band at the gap, preventing the cutting part from damaging the box when cutting the band. Furthermore, because the pressing part presses the target surface to form the gap, the gap can be formed with a simpler structure than the conventional structure of pulling out the band. This reduces the manufacturing cost of the cutting device.

[0015] With this configuration, the cutter cuts the band with the protective part positioned in the gap, which prevents the cut part from damaging the box body when the band is cut. Also, the cutter cuts the band from the side opposite the protective part, which prevents the cut part from damaging the box body when the band is cut.

[0016] With this configuration, since the pressing section is provided upstream of the cutting section in the conveying direction, a gap can be formed between the band and the target surface when the band is cut by the cutting section, which prevents damage to the box body at the cutting section and avoids a situation where a gap is not formed and the band is not cut.

[0017] With this configuration, the cutting section is provided with an avoidance mechanism that prevents it from getting caught on the box body, so even if the cutting section comes into contact with the side of the box body, the avoidance mechanism allows the band to be cut without stopping the cutting device, thereby allowing the band on the box body to be cut efficiently without stopping the cutting device.

[0018] With this configuration, the moving unit moves the pressing unit and the cutting unit so that the pressing unit contacts the band, forming a gap between the band and the target surface. This allows the cutting unit to cut the band in the gap, reducing damage to the box. Furthermore, because the pressing unit is a roller, damage to the box when it comes into contact with the box can be reduced.

[0019] According to the above-described invention, it is possible to provide a cutting device and a cutting method that can reduce damage to the contents of a box when cutting a band wrapped around the box. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view of a cutting unit and a peeling unit of a cutting device according to a first embodiment of the present invention. [Figure 2] 1 is a side view of a cutting device according to a first embodiment of the present invention. [Figure 3] FIG. 2 is a side view of a cutting unit and a pressing unit of the cutting device according to the first embodiment of the present invention. [Figure 4] FIG. 2 is a plan view of a cutting unit of the cutting device according to the first embodiment of the present invention. [Figure 5] FIG. 2 is a plan view of a peeling unit of the cutting device according to the first embodiment of the present invention. [Figure 6] FIG. 2 is a plan view of a collection unit of the cutting device according to the first embodiment of the present invention. [Figure 7] FIG. 2 is a side view of the collection unit of the cutting device according to the first embodiment of the present invention. [Figure 8] 3 is a flowchart of the cutting device according to the first embodiment of the present invention. [Figure 9] 9(a) and 9(b) are side views showing the state in which the avoidance mechanism is used to avoid contact when the cutting part of the cutting device according to the first embodiment of the present invention comes into contact with the front surface of a box body, FIG. 9(b) is a side view showing the state in which the cutting part 21 has been moved by the avoidance mechanism, and FIG. 9(c) is a side view showing the state in which the protecting part comes into contact with the top surface. [Figure 10] 10(a) is a side view of the cutting section of the cutting device according to the first embodiment of the present invention when cutting a band, where FIG. 10(a) is a side view of the pressing section pressing the upper surface, FIG. 10(b) is a side view of the protective section entering the gap, and FIG. 10(c) is a side view of the band being cut by the rotary blade. [Figure 11]11(a) and 11(b) are plan views of a peeling roller of a cutting device according to a second embodiment of the present invention, in which FIG. 11(a) is a plan view of a peeling roller having a brush on its outer circumferential surface, and FIG. 11(b) is a plan view of a peeling roller having an elastic body on its outer circumferential surface. [Figure 12] FIG. 10 is a side view of a collection unit of a cutting device according to a third embodiment of the present invention. [Figure 13] FIG. 10 is a front view of a collection unit of a cutting device according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] A cutting device 1 according to a first embodiment of the present invention will be described with reference to Figs. 1 to 10. As shown in the drawings, up, down, front, back, left and right directions are defined. The cutting device 1 cuts and collects a band 11 wound around a box body 10.

[0022] Box 10 has top surface 10A, side surfaces 10B, front surface 10C, rear surface 10D, and bottom surface 10E. In this embodiment, box 10 is a cardboard box, but is not limited to this and can also be made of other materials such as resin, wood, or ceramic. In this embodiment, the contents packed in box 10 are fluid, powder, granular, or viscous food, feed, or materials placed in an inner bag, but are not limited to these and may be any other contents. Top surface 10A is an example of a target surface in the present invention, and front surface 10C is an example of an entry surface in the present invention.

[0023] As shown in Fig. 2, the cutting device 1 is mainly composed of a cutting unit 2 that cuts the band 11, a peeling unit 3 that peels the band 11 from the box body 10, a collection unit 4 that collects the band 11, and a conveying section 5 that conveys the box body 10. The cutting device 1 is arranged in the order of the cutting unit 2, peeling unit 3, and collection unit 4 from the rear to the front. A three-dimensional camera (not shown) is provided upstream (rear) of the cutting unit 2, which recognizes the shape of the box body 10 and the position of the band 11. The direction from the rear to the front is an example of the conveying direction in the present invention.

[0024] The cutting unit 2 has a cutting section 21, a pressing section 22, and a clamping section 23. As shown in Fig. 3, the cutting section 21 and the pressing section 22 are integrally configured and can be moved in the vertical direction by a moving section 2A.

[0025] The cutting unit 21 is composed of a rotary blade 24 and a protective unit 25 located below the rotary blade 24. The rotary blade 24 is polygonal and comes into contact with and cuts the band 11 while rotating. The protective unit 25 is configured to extend rearward from below the rotary blade 24 and has a guide unit 25A that is inclined obliquely upward and forward to guide the band 11 to the rotary blade 24. The rear end of the protective unit 25 is located rearward of the rotary blade 24. The cutting unit 21 cuts the band 11 between the protective unit 25 and the rotary blade 24. The rotary blade 24 is an example of a cutter unit of the present invention.

[0026] As shown in FIG. 9, the cutting unit 21 has an avoidance mechanism 21A that holds the cutting unit 21 rotatably and vertically movable. The avoidance mechanism 21A is composed of a rotating unit 21B, a movement groove 21C, and a spring 21D. The rotating unit 21B rotatably supports the cutting unit 21 and allows it to move vertically within the movement groove 21C. The spring 21D presses the rotating unit 21B downward. When the protection unit 25 collides with the front surface 10C of the box 10 as shown in FIG. 9(a), the avoidance mechanism 21A rotates the cutting unit 21 counterclockwise and moves it upward as shown in FIG. 9(b), thereby avoiding a situation in which the protection unit 25 comes into contact with the front surface 10C and the box 10 cannot move forward.

[0027] As shown in FIGS. 3 and 4 , the pressing unit 22 is located behind the cutting unit 21 and presses the top surface 10A of the box body 10 from top to bottom. The pressing unit 22 has a first pressing roller 26 and a second pressing roller 27 located to the left of the first pressing roller 26. The first pressing roller 26 and the second pressing roller 27 are spaced apart in the left-right direction, with the cutting unit 21 located in front of them. The vertical positions of the first pressing roller 26 and the second pressing roller 27 can be finely adjusted using an adjustment mechanism (not shown). When the first pressing roller 26 and the second pressing roller 27 are moved downward by the moving unit 2A and come into contact with the box body 10, they move while rotating on the top surface 10A, slightly indenting the top surface 10A downward. The downward direction in which the pressing unit 22 indents the top surface 10A is an example of a pressing direction in the present invention.

[0028] As shown in FIG. 4 , the clamping units 23 are disposed on the left and right sides of the box body 10, are movable in the left and right directions, and transport the box body 10 forward while clamping it from the left and right. The clamping units 23 include clamping belts 28 for transporting the box body 10 and guides 29 for guiding the box body 10. The clamping belts 28 rotate while in contact with the side surfaces 10B of the box body 10, thereby transporting the box body 10 forward. Furthermore, by clamping the left and right sides of the box body 10 with the clamping belts 28, the box body 10 is prevented from lifting up or tilting when the top surface 10A is pressed by the clamping units 23.

[0029] The guide 29 is located at the rear of the clamping sections 23 and is configured to incline toward the right front, guiding the box 10 between the clamping sections 23. As a result, even if the box 10 enters the cutting unit 2 in an inclined state, the corners of the box 10 are guided inward by the clamping belts 28 of the guide 29, so that the box can be placed between the clamping sections 23.

[0030] As shown in FIG. 5 , the peeling unit 3 abuts against the side surface 10B of the box body 10 to partially peel the band 11 from the box body 10. The peeling unit 3 has a pair of peeling sections 31 spaced apart in the left-right direction and a peeling plate 32 attached to each peeling section 31. The peeling sections 31 are movable in the left-right direction and each includes two peeling plates 32. The peeling plates 32 are flat metal plates that protrude inward and are spaced apart in the front-to-back direction. The peeling plates 32 have a movable mechanism that rotates their tips when they abut against the side surface 10B of the box body 10. This prevents the peeling plate 32 from moving and interfering with the transport of the box body 10, even if the front surface 10C of the box body 10 comes into contact with the peeling plate 32. The peeling plate 32 contacts the band 11 at the step between the side surface 10B and the band 11, thereby peeling the band 11 from the box body 10.

[0031] As shown in FIGS. 6 and 7, the recovery unit 4 recovers the bands 11 partially peeled from the box body 10 by the peeling unit 3. The recovery unit 4 has a band storage section 41 that stores the bands 11. The band storage section 41 is provided below the conveying section 5, and has a drop opening 42 formed therein so that the bands 11 fall under their own weight. As shown in FIG. 7, the drop opening 42 is formed so as to open toward the mounting section 51 on which the box body 10 of the conveying section 5 is placed. In other words, because the drop opening 42 opens upward in the mounting section 51, the bands 11 partially peeled by the peeling plate 32 fall under their own weight into the band storage section 41.

[0032] The drop opening 42 has a left-right distance that is at least wider than the left-right width of the box 10 that can be transported by the transport unit 5, and a front-rear distance that is longer than the width of the band 11. This allows the band 11 to drop into the band storage unit 41 without getting caught in the drop opening 42.

[0033] In the recovery unit 4, the transport section 5 upstream of the band storage section 41 is preferably a belt conveyor, which prevents the bands 11 peeled by the peeling unit 3 from falling. Note that the transport section 5 downstream of the band storage section 41 may be a roller conveyor.

[0034] 2, the conveying section 5 is provided across the cutting unit 2, peeling unit 3, and collection unit 4, and conveys the box bodies 10 to downstream processes. The conveying section 5 has a placement section 51 on which the box bodies 10 are placed. The conveying section 5 has a portion where the placement section 51 is partially discontinued at the collection unit 4, and this portion becomes the drop opening 42.

[0035] Next, the process by which the cutting device 1 cuts and collects the band 11 of the box body 10 will be described with reference to FIG.

[0036] The cutting device 1 recognizes the shape of the box 10 and the position and shape of the band 11 using a 3D camera (not shown), and transmits the data to a control unit (not shown) (S1). In the cutting device 1 of this embodiment, the band 11 on the upper surface 10A is placed on the placement unit 51 so that it extends laterally.

[0037] The box body 10 conveyed by the conveying section 5 is clamped from the left and right by the clamping section 23 in the cutting unit 2 (S2). At this time, even if the box body 10 is conveyed at an angle, it is adjusted so as to be straight by the clamping belt 28 and the guide 29. The distance that the clamping section 23 moves inward is determined based on the shape of the box body 10 recognized in S1.

[0038] When the box body 10 is conveyed forward by the clamping belts 28 and reaches a predetermined position, the moving part 2A lowers the cutting unit 2. The predetermined position here refers to a position where the front surface 10C exceeds the pressing part 22 when viewed from above. The timing for lowering the cutting unit 2 is preferably a position where the first pressing roller 26 and the second pressing roller 27 can press the band 11, but this can be set arbitrarily depending on the distance between the cutting part 21 and the pressing part 22 and the shape of the box body 10.

[0039] Depending on the shape of the box 10 and the conveying speed of the conveying unit 5, as shown in FIG. 9, when the moving unit 2A lowers the cutting unit 2, the protective unit 25 may collide with the front surface 10C. In this case, the protective unit 25 becomes an obstacle, preventing the box 10 from moving forward and causing the cutting device 1 to make an emergency stop. To avoid this situation, the cutting unit 21 is configured to rotate counterclockwise and rise by the avoidance mechanism 21A, so that it can avoid a collision with the front surface 10C. Specifically, as shown in FIG. 9(a), when the tip of the guide unit 25A collides with the front surface 10C, as shown in FIG. 9(b), the box 10 is conveyed forward, pushing the cutting unit 21 forward, rotating counterclockwise and rising, and climbing over the corner of the box 10. Then, as shown in FIG. 9(c), the protective unit 25 rotates clockwise and moves over the top surface 10A.

[0040] 10(a), when the upper surface 10A comes into contact with the first pressure roller 26 and the second pressure roller 27, the upper surface 10A is depressed downward (S4), as shown in FIG. 10(a), thereby forming a gap 11a between the band 11 and the upper surface 10A.

[0041] As the box 10 is conveyed forward by the clamping belt 28, the protective portion 25 enters the gap 11a, protecting the box 10 from damage caused by the rotary blade 24, as shown in FIG. 10(b). As the box 10 is further conveyed forward, the rotary blade 24 cuts the band 11 at the portion of the band 11 that is positioned in the gap 11a and in contact with the protective portion 25, as shown in FIG. 10(c) (S5). After the cutting portion 21 passes the rear surface 10D, the moving portion 2A raises the cutting unit 2 and returns it to its initial position. This allows all of the bands 11 to be cut, even if multiple bands 11 are wrapped around the box 10. The timing for raising the moving portion 2A is determined based on the shape of the box 10 and the number of bands 11 recognized in S1.

[0042] The box 10 from which the band 11 has been cut is transported to the peeling unit 3 by the transport section 5. At this time, the band 11 has been cut at the top surface 10A, so the band 11 is partially raised on the top surface 10A, but the side surface 10B may be in contact with the band 11.

[0043] In the peeling unit 3, the conveying section 5 conveys the box body 10 forward while the peeling plate 32 comes into contact with the side surfaces 10B on both the left and right sides, and comes into contact with the band 11 at the step between the band 11 and the side surfaces 10B, thereby partially peeling the band 11 from the box body 10 (S6). Specifically, the peeling section 31 moves inward at the timing when the front corner of the box body 10 comes into contact with the peeling plate 32. The distance that the peeling section 31 moves inward is determined based on the shape of the box body 10 recognized in S1.

[0044] If band 11 is tightly wrapped around box 10 and the corners of box 10 are deformed, simply cutting band 11 may not cause it to fall under its own weight. In this embodiment, peeling unit 3 comes into contact with band 11 on side surface 10B to partially peel band 11 from top surface 10A and side surface 10B, creating a condition in which band 11 can easily fall under its own weight.

[0045] After the bands 11 are partially peeled off by the peeling unit 3, the conveying unit 5 conveys the box 10 to the recovery unit 4. As shown in FIGS. 6 and 7, when the box 10 conveyed to the recovery unit 4 passes through the drop opening 42, the bands 11 fall by their own weight and are automatically stored in the band storage unit 41 (S7). Thereafter, the bands 11 are cut, and the recovered box 10 is conveyed by the conveying unit 5 to the next process.

[0046] With this configuration, the cutting portion 21 cuts the band 11 at the gap 11a, thereby preventing the cutting portion 21 from damaging the box body 10 when cutting the band 11. Furthermore, the pressing portion 22 presses the top surface 10a to form the gap 11a, so the gap can be formed with a simpler structure than the conventional structure in which the band 11 is pulled out. This allows the manufacturing cost of the cutting device 1 to be reduced.

[0047] With this configuration, the rotary blade 24 cuts the band 11 with the protective portion 25 positioned in the gap 11a, thereby preventing the cutting portion 21 from damaging the box body 10 when cutting the band 11. Furthermore, the rotary blade 24 cuts the band 11 from the side opposite the protective portion 25 relative to the band 11, thereby preventing the cutting portion 21 from damaging the box body 10 when cutting the band 11.

[0048] With this configuration, the pressing unit 22 is provided at the rear, upstream side in the conveying direction, of the cutting unit 21, so that a gap 11a can be formed between the band 11 and the top surface 10A when the band 11 is cut by the cutting unit 21. This prevents the box body 10 from being damaged by the cutting unit 21, and also prevents a situation in which the band 11 is not cut because the gap 11a is not formed.

[0049] With this configuration, the cutting unit 21 is provided with an avoidance mechanism 21A that prevents it from getting caught on the box body 10, so even if the cutting unit 21 comes into contact with the side surface 10B of the box body 10, the avoidance mechanism 21A allows the band 11 to be cut without stopping the cutting device 1. This allows the band 11 of the box body 10 to be cut efficiently without stopping the cutting device 1.

[0050] With this configuration, the moving unit 2A moves the pressing unit 22 and the cutting unit 21 so that the pressing unit 22 contacts the band 11, thereby forming a gap 11a between the band 11 and the top surface 10A. As a result, the band 11 in the gap 11a is cut by the cutting unit 21, thereby reducing damage to the box body 10. Furthermore, because the pressing unit 22 has the first pressing roller 26 and the second pressing roller 27, damage caused when it comes into contact with the box body 10 can be suppressed.

[0051] Next, a second embodiment of the present invention will be described with reference to Fig. 11. The same components as those in the first embodiment will be given the same reference numerals and the description thereof will be omitted.

[0052] A cutting device 101 according to the second embodiment is provided with a peeling roller 132 instead of the peeling plate 32 of the peeling unit 31. The peeling roller 132 shown in Fig. 11(a) is rotatably supported by the peeling unit 31 and has a brush 133 provided on its outer circumferential surface. When the brush 133 comes into contact with the side surface 10B of the box body 10 transported by the transport unit 5, the friction of the brush 133 causes the band 11 to be partially peeled off from the side surface 10B and the top surface 10A.

[0053] 11(b), a peeling roller 142 is provided on its outer circumferential surface with a gripping rubber elastic body 143. When the brush 133 comes into contact with the side surface 10B of the box 10 being conveyed by the conveying unit 5, the grip of the elastic body 143 causes the band 11 to be partially peeled off from the side surface 10B and the top surface 10A.

[0054] With this configuration, the band 11 can be partially peeled off from the side surface 10B and the top surface 10A by the peeling roller 132 and the peeling roller 142. This prevents the band 11 from getting caught on the box 10 in the collection unit 4, and allows the band 11 to be separated from the box 10 by its own weight.

[0055] Next, a third embodiment of the present invention will be described with reference to Figures 12 and 13. The same components as those in the first embodiment will be given the same reference numerals and the description thereof will be omitted.

[0056] The collection unit 204 of the cutting device 201 is provided with a bottom moving part 241, a bottom pressing part 242, and a bottom hooking part 243 in the band storage part 41. The bottom moving part 241 moves the bottom pressing part 242 and the bottom hooking part 243 in the up and down direction.

[0057] 13, the bottom pressing portions 242 are generally U-shaped with rollers 242A at their tips, which come into contact with the bottom surface 10E and press upward to form a gap 242a between the band 11 and the bottom surface 10E. The bottom hooking portion 243 is provided in front of the bottom pressing portion 242 and between the rollers 242A. When inserted into the gap 242a formed by the bottom pressing portion 242, the bottom hooking portion 243 hooks the band 11 and causes it to drop into the band storage portion 41 under its own weight.

[0058] When the box 10 is transported and positioned at the drop opening 42, the recovery unit 204 raises the bottom moving part 241 so that the roller 242A contacts the front end of the bottom surface 10E. Specifically, the bottom moving part 241 raises the bottom pressing part 242 at the timing when the roller 242A contacts the lower end of the front surface 10C of the box 10. This presses the bottom surface 10E upward, and as shown in FIG. 12 , a gap 242a is formed between the band 11 and the bottom surface 10E. When the transport part 5 transports the box 10 further forward, the bottom hook part 243 enters the gap 242a and separates the band 11 from the box 10.

[0059] With this configuration, even if the stripping unit 3 is unable to sufficiently strip the band 11 from the box 10, the recovery unit 4 can strip the band 11 from the box 10 and recover it in the band storage section 41.

[0060] The cutting device and cutting method according to the present invention are not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the invention described in the claims.

[0061] In the above-described embodiment, the shape of the box 10 and the position of the band 11 are recognized by a camera (not shown), but this is not limiting. For example, various sensors may be arranged in the multiple conveying sections 5 to set the timing for lowering the cutting unit 2 and the left-right positions of the clamping section 23 and the peeling section 31.

[0062] In the above-described embodiment, guide portion 25A is provided on protector 25, but the present invention is not limited to this. For example, by providing a roller at the tip of protector 25, band 11 can be smoothly guided, and avoidance mechanism 21A can be smoothly operated even if the tip of protector 25 comes into contact with front surface 10C, as shown in FIG.

[0063] In the above-described embodiment, a box 10 around which a single band 11 is wound is used, but the box 10 that can be processed by the cutting device 1 is not limited to this. For example, even in the case of a box 10 around which two or more bands 11 are wound, the bands 11 can be cut and collected according to the flow of Fig. 8. Note that if the bands 11 are wound in a cross shape, the bands 11 can be cut and collected by arranging two cutting devices 1 side by side and placing a unit that rotates the box 10 by 90 degrees between them.

[0064] In the above embodiment, the cutting unit 2 presses the top surface 10A to form the gap 11a and cuts the band 11, but this is not limiting. For example, the band 11 may be cut on the side surface 10B or the bottom surface 10E.

[0065] In the above-described embodiment, the peeling plate 32 in the peeling unit 3 comes into contact with the band 11 on the side surface 10B to partially peel it off, but this is not limiting. For example, the peeling plate 32 may come into contact with the band 11 on the top surface 10A or the bottom surface 10E to partially peel off the band 11. Also, although the peeling portion 31 is provided on both the left and right sides of the box body 10, it may be provided on at least one side.

[0066] In the above-described embodiment, the avoidance mechanism 21A allows the cutting unit 21 to rotate counterclockwise and move upward, but this is not limited to this. The avoidance mechanism 21A may be capable of at least one of rotation and vertical movement. This allows the band 11 to be smoothly cut by avoiding the collision of the guide unit 25A with the front surface 10C, even if the guide unit 25A collides with the front surface 10C. [Explanation of symbols]

[0067] 1, 101, 201 cutting device 2 cutting units 3 Peeling unit 4 Recovery Unit 5. Conveyor 10 box body 10A top 10C front 11 bands 11a Gap 21 Cut section 21A Avoidance mechanism 22 Pressing section 23 Clamping part 24 Rotary Blade 31 Peeling section 32 Peeling board 41 Band storage section 42 Drop Hole 132, 142 peeling roller

Claims

1. A cutting device for cutting a band wound around a box body, a pressing portion that presses the target surface of the box body to recess the target surface in a pressing direction, thereby forming a gap between the band and the target surface; a cutting portion that cuts the band at the gap formed by the pressing portion.

2. the cutting portion has a protection portion inserted into the gap and a cutter portion that cuts the band, The cutting device according to claim 1, characterized in that when the cutting section cuts the band, the protective section is positioned in the gap and the cutter section cuts the band from the side opposite to the side on which the protective section is positioned.

3. Further, a conveying unit that conveys the box body in a conveying direction is provided. The cutting device according to claim 1 , wherein the pressing portion is provided on the upstream side of the cutting portion in the conveying direction.

4. a conveying unit that conveys the box body in a conveying direction; The cutting device according to claim 1, further comprising an avoidance mechanism that is provided in the cutting section and that is activated when the cutting section comes into contact with an approach surface that is perpendicular to the target surface and located downstream in the conveying direction, thereby preventing the cutting section from getting caught on the approach surface and guiding the cutting section to the target surface.

5. a moving unit that moves the pressing unit and the cutting unit to bring the pressing unit into contact with the target surface; the pressing unit has a roller, and when the pressing unit contacts the target surface by the moving unit, the roller rotates on the target surface; The cutting device according to claim 1 , wherein the moving unit moves the pressing unit and the cutting unit so that the roller comes into contact with the band.

6. A cutting method for cutting a box body around which a band is wound, comprising the steps of: a step of pressing a target surface of the box body to recess the target surface in a pressing direction, thereby forming a gap between the band and the target surface; and cutting the band at the formed gap.

Images