Sheet material push-cutting device

Abstract

To provide a sheet-like member press-cutting device which prevents a burr from being generated on a cutting surface of a product and can secure a cutting instrument service life of a die cut roll.SOLUTION: When press-cutting a product after inserting and conveying a sheet-like member such as a thick sheet to a space between a die cut roll 8 in which a blade part 9 is formed on the outer peripheral surface thereof and an anvil roll 12 which has a flat outer peripheral surface 12a, a rotational shaft 13a of a pressure roll 13 which presses the die cut roll 8 against the anvil roll 12 side with contact of an outer peripheral surface 13a to a contact surface 11 formed on the outer peripheral surface of the die cut roll 8 is arranged being deviated by a prescribed amount to the downstream side in the sheet-like member conveyance direction from a reference straight line L connecting a rotational axis 8a of the die cut roll 8 and a rotational axis 12a of the anvil roll 12. Consequently, the die cut roll 8 is brought closer to the anvil roll 12 side at the time of sheet-like member insertion, the blade part 9 of the die cut roll 8 is pushed into the sheet-like member and the product can be efficiently press-cut.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a sheet-like material press-cutting device, and more particularly to a sheet-like material press-cutting device that presses and cuts products from a sheet-like material using a die-cut roll. [Background technology]

[0002] One type of press-cutting device, known as a die-cut roller, consists of a die-cut roll with cutting blades formed on its cylindrical outer surface to cut the product, positioned opposite an anvil roll that also has a cylindrical outer surface. The rotation axes of the die-cut roll and the anvil roll are parallel to each other, and the tips of the cutting blades of the die-cut roll are set so that there is almost no clearance between them and the outer surface of the anvil roll. In this press-cutting device, the outer surface of the anvil roll is abutted against a contact surface that is continuously formed circumferentially along the outer surface of the die-cut roll in the area other than the cutting blades. A sheet-like material to be pressed and cut is transported between the die-cut roll and the anvil roll from a predetermined direction, and the material to be pressed and cut is transported in the same direction while the rolls are rotating, allowing the cutting blades of the die-cut roll to press and cut the product from the material to be pressed and cut.

[0003] An example of such a push-cutting device is described in Patent Document 1. This push-cutting device has a die-cut roll and an anvil roll arranged facing each other in a roughly vertical direction, with either one of them being movable in the horizontal direction, thereby effectively generating cutting pressure between the die-cut roll and the anvil roll to push through the material to be pushed through. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-150935 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, in a press-cutting device using a die-cut roll, a separate pressure roll has been put into practical use, in which either the die-cut roll or the anvil roll (usually the die-cut roll) is pressed against the other. For example, this pressure roll is brought into contact with the abutment surface of the die-cut roll, and in this state, the die-cut roll is pressed against the anvil roll to apply pressure. In such a press-cutting device having a pressure roll, the rotation axis of the pressure roll is generally arranged on a straight line connecting the rotation axis of the anvil roll and the rotation axis of the die-cut roll, which are arranged side by side in the vertical direction, as viewed from the direction of the rotation axis of the die-cut roll (see Figure 8).

[0006] However, when a product is cut from cardboard using a cutter with such a roll layout, burrs or whisker-like scraps, known as burrs, can form on the cut surface of the product. While these burrs can be improved by increasing the pressure applied by the pressure roll between the die-cut roll and the anvil roll, this creates a trade-off: the blades of the die-cut roll are unnecessarily pressed against the outer circumferential surface of the anvil roll, which prematurely wears the blades of the die-cut roll and shortens their lifespan, resulting in a premature decline in product quality. Similar problems can also occur when a cutter cuts a thick, fibrous sheet material. Therefore, a sheet material cutter that can effectively cut through such sheet material is desired.

[0007] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a sheet-like material push-cutting device that is less likely to produce burrs on the cut surface of the product and that can ensure the blade life of the die-cut roll. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the present invention provides a sheet-like material press-cutting device for pressing a product out of a thick, fibrous sheet-like material, the device comprising: a die-cut roll having a cylindrical outer circumferential surface, rotated about a central axis of the cylindrical shape as a rotation axis, and having blade portions formed on the outer circumferential surface for pressing the product out; an anvil roll having a cylindrical outer circumferential surface, the central axis of the cylindrical shape being a rotation axis parallel to the rotation axis of the die-cut roll, and having an outer circumferential surface that abuts against abutment surfaces formed continuously in the circumferential direction along the outer circumferential surface of the die-cut roll in areas other than the blade portions; and The central axis of the cylindrical shape is a rotation axis parallel to the rotation axis of the die-cut roll, and the outer peripheral surface abuts against the contact surface of the die-cut roll to press the die-cut roll toward the anvil roll.The configuration is such that the product is pressed off from the sheet-like material transported between the die-cut roll and the anvil roll from a predetermined direction by the blade of the die-cut roll, and the rotation axis of the pressure roll is positioned a predetermined amount downstream in the transport direction of the sheet-like material, as viewed from the direction of the rotation axis of the die-cut roll, from a reference line connecting the rotation axis of the die-cut roll and the rotation axis of the anvil roll. [Effects of the Invention]

[0009] According to the sheet-like material push-cutting device of the present invention, when the sheet-like material is sandwiched between the die-cut roll and the anvil roll, the blade portion of the die-cut roll is pushed toward the anvil roll, thereby allowing the sheet-like material to be efficiently pushed through by the blade portion of the die-cut roll, making it less likely that burrs will form on the cut surface of the product, and since the blade portion of the die-cut roll is not unnecessarily pressed against the outer peripheral surface of the anvil roll, the blade life of the die-cut roll can be secured. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a front view showing a schematic configuration of an embodiment of a sheet-like material push-cutting device of the present invention. [Figure 2] FIG. 2 is a diagram showing a schematic configuration of an example of a paper spoon manufactured by the sheet-like material press-cutting device of FIG. 1. [Figure 3] 2 is an explanatory diagram of a die-cut roll used in the sheet-shaped material press-cutting device of FIG. 1. FIG. [Figure 4] FIG. 4 is a cross-sectional view of a blade portion of the die-cut roll of FIG. 3. [Figure 5] FIG. 2 is a right side view of the sheet-like material push-cutting device of FIG. [Figure 6] 6 is an explanatory diagram of the displacement of the die-cut roll in the sheet-like material press-cutting device of FIG. 1 and FIG. 5. [Figure 7] 6 is an explanatory diagram of the amount of deviation of a pressure roll from a reference straight line in the sheet-like member press-cutting device of FIG. 5. FIG. [Figure 8] FIG. 10 is a side view showing a schematic configuration of a conventional sheet-like material push-cutting device. [Figure 9] 9 is an explanatory diagram of the displacement of the die-cut roll in the sheet-like material press-cutting device of FIG. 8. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of a sheet-like material press-cutting device according to the present invention will be described in detail below with reference to the drawings. The embodiment described below exemplifies an apparatus and method for embodying the technical concept of the present invention, and the technical concept of the present invention does not limit the materials, shapes, structures, arrangements, etc. of the components to the embodiment described below. Furthermore, the drawings are schematic. Therefore, it should be noted that the relationship and ratio between thickness and planar dimensions differ from the actual ones, and the dimensional relationships and ratios differ between the drawings. The technical concept of the present invention can be modified in various ways within the technical scope defined by the claims.

[0012] FIG. 1 is an explanatory diagram showing the schematic configuration of a sheet-like material press-cutting device 10 of this embodiment. Here, we will explain the paper tools manufactured in this embodiment. Examples of paper tools include cutlery such as spoons, forks, knives, stirrers, chopsticks, toothpicks, skewers, etc., and medical instruments such as tongue depressors and wiping swab, which are tools that are held by people and used to act on objects or the human body and are made of paper. Here, we will explain the case of manufacturing a paper spoon (hereinafter also referred to as a paper spoon) as a paper tool.

[0013] FIG. 2 shows the schematic configuration of an example of a paper spoon 1, with FIG. 2a being a plan view and FIG. 2b being a right side view. As shown in FIG. 2, paper spoon 1 has a tapered rectangular shape in plan view, i.e., a trapezoidal tip (upper side of FIG. 2), with the spoon's overall longitudinal length just under 8 cm, its maximum width just under 3 cm, and its thickness about 2 mm. The tip of paper spoon 1 has a shape that is line-symmetrical with respect to a line segment passing through the center in the width direction as an axis, and both corners of the tip are rounded. A long, thin rectangular handle 1a extends downward in FIG. 2 from this tip, and is gripped between the index finger and thumb in the thickness direction, allowing the wide tip to scoop up objects such as ice cream or dumplings.

[0014] The cardboard for the paper spoon 1 is formed from a three-layered sheet of hard paper made by laminating three sheets of water-resistant paper. The cardboard for the paper spoon is a sheet-like material containing fibers and is, needless to say, thick. By subjecting this sheet-like cardboard for the paper spoon to a press-cutting process using the press-cutting device 10 shown in FIG. 1, the paper spoon 1 shown in FIG. 2 is obtained. The cardboard for the paper spoon is not limited to a three-layered structure; it may be cardboard formed by laminating a single, two, four, or more layers of water-resistant paper. Any cardboard that is water-resistant and strong can be used. Here, the tip of the paper spoon 1 is shown as having a tapered rectangular shape like a plate. However, the shape of the paper spoon 1 is not limited to this. For example, it may be rectangular in plan view, as long as it can function as a spoon, such as being able to scoop up an object.

[0015] FIG. 3 is an explanatory diagram of a die-cut roll 8 used in the sheet-like material cutter (hereinafter referred to as the cardboard cutter) 10 of FIG. 1, with FIG. 3a being a front view of the die-cut roll 8 and FIG. 3b being a developed view of the outer circumferential surface of the die-cut roll 8. The outer circumferential surface of this die-cut roll 8 is formed with a plurality of blades 9 for cutting paper spoons 1 from cardboard for paper spoons. Each blade 9 is formed in a frame shape similar to the outline of the paper spoon 1 in a plan view. FIG. 4 is a cross-sectional view of the blade 9 of the die-cut roll 8 taken along line B-B' in FIG. 3. This blade 9 is formed so that the cross section perpendicular to the blade groove has a mountain shape. In this example, the inner angle θin formed by the side of the frame-like blade 9 located closer to the inside of the frame and a line extending in the height direction of the mountain shape is set to be equal to the outer angle θout formed by the side of the frame-like blade 9 located closer to the outside of the frame and a line extending in the height direction of the mountain shape. In order to ensure the strength of the cutting portion 9, it is preferable that the sum of the inner angle θin and the outer angle θout be equal to or greater than a certain angle (for example, equal to or greater than 30 degrees).

[0016] FIG. 1 is a front view showing the schematic configuration of a cardboard cutter 10 of this embodiment for cutting paper spoons 1 using the die-cut roll 8, and FIG. 5 is a right side view of FIG. 1. As described above, this cardboard cutter 10 has the die-cut roll 8 positioned above the anvil roll 12, facing the anvil roll 12. Both the anvil roll 12 and the die-cut roll 8 have cylindrical outer circumferential surfaces, and the anvil roll 12 has a cylindrical outer circumferential surface 12b in particular. In contrast, the die-cut roll 8 has a blade 9 formed in the axial center and its surrounding area on its outer circumferential surface. On both sides of this area, i.e., both axial ends, abutment surfaces 11 that abut against the outer circumferential surface 12b of the anvil roll 12 are formed continuously in the circumferential direction along the outer circumferential surface. The thickness of cardboard for paper spoons cut by the cardboard cutter 10 of this embodiment is in the range of approximately 1 to 3 mm.

[0017] The outer diameter of the contact surface 11 of the die-cut roll 8 and the outer diameter of the outer peripheral surface 12b of the anvil roll 12 are the same. Therefore, with the contact surface 11 of the die-cut roll 8 and the outer peripheral surface 12b of the anvil roll 12 in contact with each other, the two rolls 8 and 12 rotate synchronously in opposite directions. Both the rotation shaft 8a of the die-cut roll 8 and the rotation shaft 12a of the anvil roll 12 are central axes of the cylindrical shapes that form the outer peripheral surface 12b (contact surface 11), and the rotation shafts 8a and 12a of the die-cut roll 8 and 12a are parallel to each other. As described above, with the contact surface 11 of the die-cut roll 8 and the outer peripheral surface 12b of the anvil roll 12 in contact with each other, the tip of the mountain-shaped blade portion 9 of the die-cut roll 8 is set so that there is almost no clearance between the contact surface 11 of the die-cut roll 8 and the outer peripheral surface 12b of the anvil roll 12. In this embodiment, the rotation shaft 8a of the die-cut roll 8 is disposed vertically above the rotation shaft 12a of the anvil roll 12.

[0018] Meanwhile, in the cardboard press-cutting device 10 of this embodiment, a pressure roll 13 is disposed above and facing the die-cut roll 8. Like the die-cut roll 8, the pressure roll 13 has a cylindrical outer peripheral surface 13b, which is in contact with the contact surface 11 of the die-cut roll 8. Note that the pressure roll 13 of this embodiment has a recessed outer peripheral surface other than the area that contacts the contact surface 11 of the die-cut roll 8, i.e., the outer peripheral surface in the axial center and its neighboring areas, so that only the outer peripheral surface 13b at both axial ends contacts the contact surface 11 of the die-cut roll 8. The pressure roll 13 literally presses the die-cut roll 8 that it contacts toward the anvil roll 12. By pressing the rotation shaft 13a (e.g., a bearing portion) of the pressure roll 13 toward the die-cut roll 8, the contact surface 11 of the die-cut roll 8 can be pressed downward toward the anvil roll 12, as shown by the outline arrow in FIG. 1 .

[0019] In the cardboard press-cutting device 10 of this embodiment, gears 8c and 12c having pitch diameters equal to the maximum outer diameters of the die-cutting roll 8 and the anvil roll 12 (i.e., the outer diameter of the contact surface 11 and the outer diameter of the outer peripheral surface 12b) are attached to the die-cutting roll 8 and the anvil roll 12, respectively, and they mesh with each other. The gear 12c attached to the anvil roll 12 meshes with a drive gear 14 attached to the rotating shaft of a drive motor (not shown). Therefore, the anvil roll 12 and the die-cutting roll 8 are provided with a rotational driving force for transporting the workpiece, cardboard for paper spoons (hereinafter simply referred to as cardboard). In contrast, the pressure roll 13 is only provided with a pressure force for pressing the die-cutting roll 8 toward the anvil roll 12. The method of driving each roll is not limited to this.

[0020] 5, the characteristic feature is that, when viewed from the direction of the rotation axis 8a (axis) of the die-cut roll 8, the rotation axis 13a of the pressure roll 13 is shifted by a predetermined amount downstream in the cardboard (work in the figure) conveyance direction from a reference line L connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12. In this embodiment, the rotation axis 8a of the die-cut roll 8 is positioned vertically above the rotation axis 12a of the anvil roll 12, and therefore the rotation axis 13a of the pressure roll 13 is shifted horizontally to the right.

[0021] There are press-cutting devices 10 that press one of the die-cutting roll 8 and the anvil roll 12 (usually the die-cutting roll 8) against the other using a pressure roll 13. However, in such conventional press-cutting devices 10, as shown in FIG. 8, the rotation axis 13a of the pressure roll 13 is generally arranged on a reference line L that connects the rotation axis 8a of the die-cutting roll 8 and the rotation axis 12a of the anvil roll 12 when viewed from the direction of the rotation axis 8a of the die-cutting roll 8.

[0022] In addition, the positional relationship between the rotation axis 8a of the die-cut roll 8, the rotation axis 12a of the anvil roll 12, and the rotation axis 13a of the pressure roll 13 in the cardboard cutter device 10 of the present invention is relatively limited.For example, in a cardboard cutter device 10 in which the anvil roll 12, die-cut roll 8, and pressure roll 13 are arranged in this order from bottom to top, as in this embodiment, even if the rotation axis 8a of the die-cut roll 8 is arranged upstream in the cardboard (work) conveying direction with respect to the straight line connecting the rotation axis 12a of the anvil roll 12 and the rotation axis 13a of the pressure roll 13, the positional relationship between them is relatively the same.

[0023] For ease of understanding, the operation when cardboard is pressed through using the conventional press-cutting device 10 shown in Figure 8 will be described. When cardboard is pressed through using the press-cutting device 10 in which the rotation axis 12a of the anvil roll 12, the rotation axis 8a of the die-cut roll 8, and the rotation axis 13a of the pressure roll 13 are aligned on the reference line L when viewed from the direction of the rotation axes, a force acting on the die-cut roll 8 moves it upward in the figure and downstream in the cardboard conveyance direction, mainly influenced by the thickness of the cardboard.

[0024] Figure 9 shows the time series of changes in the displacement of the die-cut roll 8 caused by the force acting on the die-cut roll 8. The upward displacement waveform indicates the direction in which the die-cut roll 8 moves away from the anvil roll 12, while the downward displacement waveform indicates the direction in which the die-cut roll 8 moves toward the anvil roll 12. As is clear from Figure 9, while cutting cardboard using the conventional cutter 10 shown in Figure 8, the die-cut roll 8 moves away from the anvil roll 12. As a result, the tip of the blade 9 moves away from the anvil roll 12, preventing the cardboard from being cut all the way to the bottom. As a result, fibrous components of the cardboard remain, resulting in burrs such as splintered ends and whisker-like scraps on the cut surface of the paper spoon 1 after punching. The reason the die-cut roll 8 moves away from the anvil roll 12 when the cardboard is inserted between the die-cut roll 8 and the anvil roll 12 is because the cardboard is thick. In other words, the reason burrs are generated on the cut surface of the product using the cutter 10 shown in Figure 8 is because the cardboard contains fibers and is thick.

[0025] These burrs cannot be removed cleanly by, for example, scrubbing with a brush, and remain on the cut surface of the finished paper spoon 1. Burrs remaining on the cut surface of the finished paper spoon 1 cause discomfort when placed in the mouth. These burrs can be eliminated to some extent by increasing the pressure applied by the pressure roll 13 between the die-cut roll 8 and the anvil roll 12. However, as inferred from the above explanation, doing so unnecessarily presses the tip of the blade 9 against the outer peripheral surface 12b of the anvil roll 12, resulting in premature wear of the tip of the blade 9 and a shortened blade life. In Figure 9, the displacement of the die-cut roll 8 away from the anvil roll 12 is approximately 12 μm when the pressure applied by the pressure roll 13 between the die-cut roll 8 and the anvil roll 12 is appropriately set. The appropriate pressure applied by the pressure roll 13 between the die-cut roll 8 and the anvil roll 12 refers to a state in which the pressure applied between the die-cut roll 8 and the anvil roll 12 is approximately zero when no cardboard is inserted between them.

[0026] In contrast, as shown in Figure 5, by shifting the rotation axis 13a of the pressure roll 13 a predetermined distance downstream in the cardboard conveyance direction relative to the reference line L connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12 as viewed from the rotation axis direction, when cardboard is inserted between the die-cut roll 8 and the anvil roll 12, a force similarly acts on the die-cut roll 8, pushing it upward and downstream in the cardboard conveyance direction. However, because the pressure roll 13 is located ahead of the direction in which this force acts, the pressure roll 13 suppresses the movement (displacement) of the die-cut roll 8 due to this force and also acts like a wedge, pushing the die-cut roll 8 toward the anvil roll 12. Figure 6 shows the time series change in the displacement of the die-cut roll 8 caused by the action of the pressure roll 13. The meaning of the displacement waveform is the same as that in Figure 9.

[0027] As is clear from FIG. 6, when cardboard is pressed through the press-cutting device 10 of this embodiment shown in FIGS. 1 and 5, the die-cut roll 8 approaches the anvil roll 12, forcing the blade 9 of the die-cut roll 8 toward the anvil roll 12. Therefore, the cardboard can be efficiently pressed through by the blade 9 of the die-cut roll 8, resulting in less burrs on the cut surface of the finished paper spoon 1. Therefore, there is no need to unnecessarily increase the pressure applied by the pressure roll 13 between the die-cut roll 8 and the anvil roll 12. As a result, wear at the tip of the blade 9 of the die-cut roll 8 can be controlled appropriately, ensuring the blade life of the die-cut roll 8. Note that the displacement of the die-cut roll 8 in the direction approaching the anvil roll 12 in FIG. 6 is approximately 2 μm when the pressure applied by the pressure roll 13 between the die-cut roll 8 and the anvil roll 12 is set appropriately.

[0028] Next, the position where the rotation axis 13a of the pressure roll 13 is disposed downstream in the cardboard conveyance direction with respect to the reference line L connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12, as viewed from the direction of the rotation axis 8a of the die-cut roll 8, will be described with reference to FIG. 7. In the cardboard press-cutting device 10 of this embodiment, the position of the rotation axis 13a of the pressure roll 13 is specified as a shift amount (predetermined amount) downstream in the cardboard (work) conveyance direction with respect to the reference line L connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12. The position of the pressure roll 13 affects the pressing (pressing) position of the pressure roll 13 against the die-cut roll 8. The pressing position of the pressure roll 13 and the position of the rotation axis 13a of the pressure roll 13 depend on, for example, the outer diameter of the die-cut roll 8. In other words, even if the amount of deviation of the rotation axis 13a of the pressure roll 13 downstream in the cardboard conveying direction relative to the reference line L connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12 is the same, the smaller the outer diameter of the die-cut roll 8, the greater the component that pushes the die-cut roll 8 upstream in the cardboard conveying direction when the cardboard is inserted, and conversely, the larger the outer diameter of the die-cut roll 8, the greater the component that presses the die-cut roll 8 toward the anvil roll 12.

[0029] Considering the outer diameter (contact surface 11) of the die-cut roll 8 with which the pressure roll 13 contacts, it is desirable that the amount of deviation (predetermined amount) of the pressure roll 13 downstream in the cardboard conveying direction is the amount of deviation of the rotation axis 13a of the pressure roll 13 from the reference line L connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12, when viewed from the direction of the rotation axis 8a of the die-cut roll 8, such that the angle formed by the line connecting the contact point between the contact surface 11 of the die-cut roll 8 and the outer peripheral surface 12b of the anvil roll 12 and the contact point between the contact surface 11 of the die-cut roll 8 and the outer peripheral surface 13b of the pressure roll 13 is in the range of 1° to 20° downstream in the cardboard conveying direction.

[0030] That is, if the angle between the two lines is less than 1°, the pressure applied by the pressure roll 13 to the die-cut roll 8 toward the anvil roll 12 is increased, but the wedge effect of the pressure roll 13 against the upward displacement of the die-cut roll 8 and in the cardboard conveyance direction is reduced, making it difficult to achieve the effect of pushing the die-cut roll 8 toward the anvil roll 12. On the other hand, if the angle between the two lines exceeds 20°, the effect of the pressure roll 13 to press the die-cut roll 8 toward the anvil roll 12 is reduced. Also, if the angle between the two lines is too large, the pressure roll 13 will be located downstream of the die-cut roll 8 in the cardboard conveyance direction, thereby suppressing the slight movement of the die-cut roll 8 downstream in the cardboard conveyance direction during the press-cutting process. The wedge effect of the pressure roll 13 described above is generated by the slight movement of the die-cut roll 8 downstream in the cardboard conveyance direction. Therefore, if this movement itself is suppressed, the effect of moving the die-cut roll 8 toward the anvil roll 12 will be reduced.

[0031] As in Patent Document 1, there may be a press-cutting device 10 in which the line connecting the rotation axis 8a of the die-cutting roll 8 and the rotation axis 12a of the anvil roll 12 is not perpendicular to the conveyance direction of the cardboard (workpiece). However, the press-cutting device 10 described in Patent Document 1 does not have a pressure roll 13 for pressing either the die-cutting roll 8 or the anvil roll 12 (usually the die-cutting roll 8) against the other. With a press-cutting device 10 equipped only with the die-cutting roll 8 and the anvil roll 12, it is considered difficult to suppress the displacement (escape) of the die-cutting roll 8 that occurs during cardboard press-cutting and to determine the direction in which the blade 9 of the die-cutting roll 8 is pressed into the cardboard. That is, when the cardboard is inserted, the die-cutting roll 8 displaces away from the anvil roll 12 downstream in the cardboard conveyance direction. However, the pressure roll 13 must be positioned to suppress this displacement and properly press the blade 9 of the die-cutting roll 8 into the cardboard.

[0032] In this embodiment, when cardboard is sandwiched between the die-cut roll 8 and the anvil roll 12, a force acts to separate the die-cut roll 8 from the anvil roll 12. However, the pressure roll 13, which is positioned downstream in the cardboard conveyance direction, suppresses the movement of the die-cut roll 8, acting like a wedge and forcing the die-cut roll 8 closer to the anvil roll 12. As a result, the blade 9 of the die-cut roll 8 is pressed toward the anvil roll 12, allowing the cardboard to be efficiently cut by the blade 9 of the die-cut roll 8. This reduces the likelihood of burrs on the cut surface of the product. Furthermore, because there is no need to unnecessarily increase the pressing force between the die-cut roll 8 and the anvil roll 12 by the pressure roll 13, the blade 9 of the die-cut roll 8 is not unnecessarily pressed against the outer peripheral surface 12b of the anvil roll 12. This prevents premature wear of the blade 9 of the die-cut roll 8 and ensures its long life.

[0033] Furthermore, with regard to the position where the pressure roll 13 is disposed downstream in the cardboard conveying direction with respect to a reference line L connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12, the angle formed by a line connecting the contact point between the abutment surface 11 of the die-cut roll 8 and the outer peripheral surface 12b of the anvil roll 12 and the contact point between the abutment surface 11 of the die-cut roll 8 and the outer peripheral surface 13b of the pressure roll 13 with respect to the reference line L is specified as the amount of deviation of the rotation axis 13a of the pressure roll 13 from the reference line L in the range of 1° to 20° downstream in the cardboard conveying direction. This makes it possible to achieve both a wedge effect for suppressing displacement of the die-cut roll 8 away from the anvil roll 12 and adjustment of the pressure force pressing the die-cut roll 8 toward the anvil roll 12. Furthermore, when punching out paper cutlery as a product, by preventing burrs from being produced on the punched cutlery, it is possible to avoid discomfort in the oral cavity and ensure safety, thereby ensuring and improving the product quality of the cutlery.

[0034] Although the cardboard press-cutting device 10 according to the embodiment has been described above, the present invention is not limited to the configuration described in the above embodiment, and various modifications are possible within the scope of the present invention. For example, in the above embodiment, only the cardboard press-cutting device 10 in which the position of the pressure roll 13 downstream in the cardboard conveyance direction is fixed is described, but the position of the pressure roll 13 may be changed or adjusted downstream in the cardboard conveyance direction from the straight line connecting the rotation axis 8a of the die-cut roll 8 and the rotation axis 12a of the anvil roll 12.

[0035] In addition, in the above embodiment, the cardboard to be pressed and cut needed to be water-resistant in order to be used as the paper spoon 1, but not all cardboard that is pressed and cut by the cardboard press-cutting device 10 of the present invention needs to be water-resistant. Similarly, various types of cardboard can be used as the cardboard to be pressed and cut (the member to be pressed and cut). Although the above embodiment only describes the cardboard press-cutting device 10 for pressing products out of cardboard, the press-cutting device of the present invention is also useful for pressing products out of sheet-like materials other than cardboard. The problem that the present invention aims to solve is the generation of burrs on the cut surface of the product, which is caused by the sheet-like material being fibrous and thick. Therefore, the sheet-like material for which the press-cutting device of the present invention is useful is a thick, fibrous sheet-like material. Examples of such sheet-like materials include thick, hard fabrics and thick, hard cellulose sponges. [Explanation of symbols]

[0036] 8 die-cut rolls 8a Rotation axis 9 Blade part 10 Push-cutting device 11 Contact surface 12 Anvil Roll 12a Rotation axis 12b Outer surface 13 Pressure roll 13a Rotation axis 13b Outer surface

Claims

1. A sheet-like material push-off device for pushing off a product from a thick, fibrous sheet-like material, a die-cut roll having a cylindrical outer peripheral surface, rotated around a central axis of the cylindrical shape as a rotation axis, and having a blade portion formed on the outer peripheral surface to cut through the product; an anvil roll having a cylindrical outer peripheral surface, the central axis of the cylindrical shape being a rotation axis parallel to the rotation axis of the die-cut roll, and the outer peripheral surface abutting on a contact surface continuously formed in a circumferential direction along the outer peripheral surface of the die-cut roll in an area other than the blade portion; a pressure roll having a cylindrical outer peripheral surface, the central axis of the cylindrical shape being a rotation axis parallel to the rotation axis of the die-cut roll, the outer peripheral surface of which abuts against the abutment surface of the die-cut roll to press the die-cut roll toward the anvil roll; a gear attached to the die-cut roll and a gear attached to the anvil roll mesh with each other; The sheet-like material is conveyed between the die-cut roll and the anvil roll from a predetermined direction, and the product is pressed and cut by the blade of the die-cut roll, A sheet-like material push-cutting device characterized in that, when viewed from the direction of the rotation axis of the die-cut roll, the rotation axis of the pressure roll is shifted by a predetermined amount downstream in the conveying direction of the sheet-like material from a reference line connecting the rotation axis of the die-cut roll and the rotation axis of the anvil roll.

2. The sheet-like material push-cutting device described in claim 1, characterized in that the specified amount is the amount of deviation of the rotation axis of the pressure roll from the reference line when, viewed from the direction of the rotation axis of the die-cut roll, the angle formed by the line connecting the contact point between the contact surface of the die-cut roll and the outer peripheral surface of the anvil roll and the contact point between the contact surface of the die-cut roll and the outer peripheral surface of the pressure roll is in the range of 1° to 20° downstream of the conveying direction of the sheet-like material.

3. 3. The sheet-like material push-cutting device according to claim 1, wherein the product is a paper cutlery.

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