JP4334664B2 - Sheet cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet cutting apparatus for cutting a film-like sheet.
[0002]
[Prior art]
As a sheet cutting apparatus for cutting a film-like sheet in which a large number of straws and plastic spoons are individually and continuously film-wrapped into individual straws and spoons, the one shown in FIG. 17 has been conventionally used. Yes. The sheet cutting apparatus 100 includes a rotatable drum 101 and an air cylinder 103 having a blade 102 for cutting a sheet S ′ wound around the outer periphery of the drum 101 at the tip of a piston rod.
[0003]
On the outer periphery of the drum 101, a plurality of holes 105 for holding the straws 104 film-wrapped by the sheet S ′ and a plurality of slits disposed between the adjacent holes 105 and into which the blades 102 are inserted. 106 are formed at equal intervals. Further, fixed guides 107 and 108 are arranged so as to surround a part of the outer periphery of the drum 101.
[0004]
When cutting the sheet, the blade 102 at the tip of the piston rod is caused to enter the slit 106 by driving the air cylinder 103 and projecting the piston rod from the state where the slit 106 of the drum 101 faces the air cylinder 103. As a result, the sheet S ′ is cut. After the sheet is cut, the piston rod is retracted to the original position, and the drum 101 is rotated so that the slit 106 where the cutting process is to be performed next is opposed to the air cylinder 103. From this state, the next sheet Cutting is performed.
[0005]
[Problems to be solved by the invention]
By the way, the end portion of the sheet cut by the blade generally tends to be lifted outward away from the outer peripheral surface of the drum. Therefore, in the conventional sheet cutting apparatus, as shown in FIG. 17, the fixed guides 107 and 108 are arranged at a predetermined distance from the outer peripheral surface of the drum, thereby separating the sheet end portion after cutting and the fixed guide. Interference is prevented.
[0006]
However, in this case, when a gap is formed between the fixed guide and the outer peripheral surface of the drum, the sheet S ′ becomes unstable when the sheet S ′ is cut, thereby causing a cutting failure. There is.
[0007]
In the conventional sheet cutting apparatus, the drum 101 is intermittently rotated one pitch at a time, and the sheet is cut when the drum 101 is stopped.
[0008]
Therefore, in the conventional apparatus, a mechanism for intermittent feeding of the drum 101 is separately required, the structure is complicated, and the drum 101 is intermittently stopped, so that the processing speed of the cutting process is slow. In addition, vibration and noise generated during operation adversely affect the machine body and the surrounding environment.
[0009]
The present invention has been made to solve such conventional problems, and can accurately cut a film-like sheet, and can smoothly cut the edge of the cut sheet toward the fixed guide member. It is an object of the present invention to provide a sheet cutting device that can be delivered. Another object of the present invention is to provide a sheet cutting apparatus capable of performing cutting while continuously operating a drum and further simplifying the structure.
[0010]
[Means for Solving the Problems]
A sheet cutting device according to claim 1 is a sheet cutting device for cutting a film-like sheet, the drum rotating while giving a constant feed to the film-like sheet wound around the outer periphery, And a fixed guide member arranged around and for guiding the sheet. Further, the sheet cutting apparatus has a blade for cutting the sheet, the sheet cut together are freely provided retractable so as contact with the sheet on the arranged and the drum outer peripheral surface side of the blade processed by a movement pad member having an abutment surface capable of retaining an end portion which is a sheet cutting point cut by the sheet cutting in the vicinity and the last sheet cut point to be cut, the cutting and moving the pad member A cutting mechanism having a movable connecting member connected to the rear end side, and a drive mechanism for driving the connecting member so that the blade and the moving pad member draw a locus of an elliptical motion . And at the time of the cutting process of the sheet , the vicinity of the sheet cutting planned part to be cut by the sheet cutting process and the sheet end part which is the sheet cutting part cut by the previous sheet cutting process are connected to the drum outer peripheral surface by the moving pad member. done cut while being held between of Rutotomoni, after cutting, the sheet end, while being held by the moving pad member which moves together with the drum rotating, the fixed guide member and the drum It moves to the gap between the outer peripheral surface .
[0011]
A sheet cutting device according to a second aspect of the present invention is the sheet cutting device according to the first aspect, wherein the drive mechanism is provided in parallel with the first rotation shaft, drive means for driving the first rotation shaft, and the first rotation shaft. A second rotating shaft that rotates in synchronization with one rotating shaft, and the first and second rotating shafts that are eccentrically provided from the centers of the rotating shafts and rotate in the same phase, The first and second eccentric shafts are inserted through the member and are rotatably supported by the connecting member.
[0012]
According to a third aspect of the present invention, there is provided a sheet cutting method comprising: a drum that rotates while giving a constant feed to a film-like sheet wound around an outer periphery; a fixed guide member that is disposed around the drum and guides the sheet; The blade has a blade for cutting, and has a movable pad member that is arranged on the side of the blade and can come into contact with a sheet on the outer peripheral surface of the drum, and is connected to the blade and the rear end side of the movable pad member. In a sheet cutting apparatus including a cutting mechanism having a movable connecting member, and a driving mechanism for driving the connecting member so that the blade and the moving pad member draw an approximately elliptical trajectory, the drum is moved when the sheet is cut. By rotating and giving a constant feed to the sheet, by driving the connecting member by the drive mechanism and drawing the locus of the approximate elliptical motion on the blade and the moving pad member, With the blade in a state where the sheet end portion that is the vicinity of the sheet cutting portion to be cut by the sheet cutting process and the sheet cutting portion cut by the previous sheet cutting process is held between the drum outer peripheral surface by the moving pad member In addition to cutting the sheet, the sheet end is moved to the gap between the fixed guide member and the outer peripheral surface of the drum while being held by the moving pad member that moves with the rotating drum. ing.
[0013]
When cutting a film-like sheet by the sheet cutting apparatus according to the first aspect of the invention, first, the blade connected to the connecting member by driving the connecting member by the drive mechanism and moving the connecting member. In addition, the moving pad member is caused to perform a substantially elliptical motion. On the other hand, the drum rotates while giving a constant feed to the sheet in a state where the sheet is wound around the outer periphery thereof.
[0014]
When the blade and the moving pad member approach the drum due to the movement of the connecting member, first, the moving pad member comes into contact with the vicinity of the cutting portion of the sheet on the outer peripheral surface of the drum. As a result, the vicinity of the sheet cutting portion is held between the moving pad member and the drum outer peripheral surface.
[0015]
When the moving pad member further moves to the drum side from this state, the moving pad member starts to be immersed, whereby the blade comes into contact with the sheet surface and the sheet is cut. After the sheet is cut, the connecting member moves to the side away from the drum, whereby the blade and the moving pad member are separated from the sheet on the outer peripheral surface of the drum.
[0016]
As described above, according to the present invention, in the sheet cutting process, the cutting process is performed in a state where the vicinity of the sheet cutting part is held by the moving pad member, so that the film sheet can be accurately cut. become.
[0017]
In this case, the sheet end cut by the previous sheet cutting process is delivered to the fixed guide member side by the moving pad member that moves together with the rotating drum. That is, the moving pad member moves to the fixed guide member side together with the drum in a state where the sheet end is sandwiched between the moving pad member and the drum. As a result, the sheet end moves toward the fixed guide member while being pressed by the moving pad member, so that the cut end of the sheet can be smoothly moved toward the fixed guide member without lifting from the outer peripheral surface of the drum. Will be able to pass on.
[0018]
Furthermore, according to the present invention, since the blade and the moving pad member draw an approximately elliptical trajectory, the blade and the moving pad member move together with the rotating drum when the sheet is cut. The sheet can be cut more accurately without causing a deviation between the blade and the sheet surface during the cutting process. In addition, the sheet can be cut while continuously operating the drum.
[0019]
Next, when the film-like sheet is cut by the sheet cutting device according to the second aspect of the invention, first, the first rotating shaft is driven and rotated by the driving means. Due to the rotation of the first rotation shaft, the second rotation shaft rotates in synchronization with the first rotation shaft. Then, the first and second eccentric shafts turn around the first and second rotating shafts with the same phase, respectively. As a result, the connecting member that rotatably supports the first and second eccentric shafts starts to reciprocate while rotating around the rotation centers of the first and second rotational shafts. As a result, the blade and the moving pad member connected to the connecting member draw a locus of an elliptical motion, and the sheet is cut.
[0020]
In this case, it is possible to realize a sheet cutting device that can accurately perform sheet cutting while continuously operating the drum and that can smoothly transfer the sheet end portion to the fixed guide member side by a simple drive mechanism. .
[0021]
Next, the operation principle of the sheet cutting apparatus according to the invention of claim 2 will be described with reference to FIGS. In these drawings, each reference sign represents the following.
D: drum, S: sheet, C: blade, N: connecting member, L: elliptical locus,
O: drum center, R ₁ : first rotation axis, R ₂ : second rotation axis,
E ₁ : first eccentric shaft, E ₂ : second eccentric shaft, e ₁ , e ₂ : eccentric amount,
A: distance between each rotation axis, B: distance between the second rotation axis and the drum center.
As shown in FIG. 15, e ₁ / (A + B) = e ₂ / B between the eccentric amounts e ₁ and e ₂ and the distances A and B.
There is a relationship. Each eccentric shaft E ₁ , E ₂ rotates around the center of each rotation shaft while maintaining the above relationship. Thereby, as shown by the locus L in FIG. 16, the blade C draws a locus of elliptical motion.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 14 are views for explaining a sheet cutting apparatus according to an embodiment of the present invention. FIG. 1 is a schematic plan view of the sheet cutting apparatus, and FIG. 2 is a cutting mechanism constituting the sheet cutting apparatus. 3 is an enlarged view of the front end portion, FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 1, and FIGS. 4 to 14 are views for explaining the operation of the sheet cutting device.
[0024]
As shown in FIG. 1, a sheet cutting device 1 includes a rotatable drum 2, a cutting mechanism 3 having a blade 31 for cutting a film-like sheet S wound around the outer periphery of the drum 2, and a drum 2. , And fixed guide members 4 and 5 that guide the sheet S.
[0025]
On the outer periphery of the drum 2, a plurality of holes 21 for holding the straw 10 that is film-wrapped by the sheet S and a plurality of slits 22 that are disposed between the adjacent holes 21 and into which the blades 31 are inserted. Are formed at equal intervals.
[0026]
As shown in FIG. 2, the cutting mechanism 3 is slidably mounted on both sides of the blade 31, and is slidably fixed to the sliders 32, 33. The movable pad members 34 and 35 made of, for example, an elastic member, holding blocks 36 and 37 for holding the blade 31 from both sides thereof, and each holding block 36, which can move in the longitudinal direction (see FIG. 1). 37 includes a holder 38 to which 37 is fixed by screwing, and a connecting member 39 to which the holder 38 is fixed.
[0027]
In each holding block 36, 37, springs 40, 41 are arranged. The rear ends of the springs 40 and 41 are in contact with the bottom wall surface of the hole formed in the holder 38, and the tips are in contact with the rear ends of the sliders 32 and 33, respectively. Thereby, when the spring is contracted, the elastic repulsive force of each spring 40, 41 acts on each moving pad member 34, 35 via the slider 32, 33, respectively. Further, when the springs 40 and 41 are extended, the tips of the blades 31 are immersed more inwardly than the tip surfaces of the movable pad members 34 and 35 (see FIG. 2).
[0028]
As shown in FIG. 3, the drive mechanism 6 of the cutting mechanism 3 includes a first rotary shaft 61 to which a rotational force from a drive motor (not shown) is transmitted and a parallel to the first rotary shaft 61. And a second rotating shaft 62 that rotates synchronously.
[0029]
The first and second rotating shafts 61 and 62 are rotatably supported by brackets 63 and 64, respectively. First and second eccentric shafts 65 and 66 are provided at the tips of the first and second rotating shafts 61 and 62, respectively, and the eccentric amounts of the eccentric shafts 65 and 66 are e ₁ and e, respectively. Shown in ₂ . The first and second eccentric shafts 65 and 66 are inserted through the connecting member 39.
[0030]
A bracket 67 is attached to the second eccentric shaft insertion portion of the connecting member 39, and the second eccentric shaft 66 is rotatably supported by the bracket 67. A long hole 68 extending in the longitudinal direction of the connecting member 39 (left and right in FIG. 3) is formed at the first eccentric shaft insertion portion of the connecting member 39 (see FIG. 1). A bearing 69 is attached to the outer periphery of the first eccentric shaft 65.
[0031]
With this configuration, when the first and second rotating shafts 61 and 62 rotate, the first and second eccentric shafts 65 and 66 rotate around the centers of the first and second rotating shafts 61 and 62, respectively. As a result, the connecting member 39 reciprocates, so that the leading edge blade 31 and the moving pad members 34 and 35 draw a substantially elliptical locus. The reason why the first eccentric shaft 65 is disposed in the long hole 68 is that the long hole 68 absorbs a dimensional error that occurs during the crank movement of the first and second eccentric shafts 65 and 66. .
[0032]
Further, when the moving pad members 34 and 35 are brought into contact with the outer peripheral surface of the drum, the moving pad members 34 and 35 are moved together with the drum 2 along the outer peripheral surface of the drum, that is, the moving pad members 34 and 35 are moved. The eccentric amounts e ₁ , e ₂ of the first and second eccentric shafts 65, 66 and the first rotating shaft 61 are adjusted so that the speed component in the drum outer peripheral surface direction substantially coincides with the peripheral speed of the drum 2. The rotational speed of the drive motor is set.
[0033]
Next, the sheet cutting processing operation by the sheet cutting apparatus 1 will be described with reference to FIGS.
Of these figures, each figure except FIG. 9 and FIG. 10 is a 45 ° rotation angle starting from the 0 ° rotation angle of the first and second rotation shafts 61 and 62 shown in FIG. Each of the states increased is shown. FIG. 9 is a schematic enlarged view of the tip portion of the cutting mechanism 3 immediately before the rotation angle reaches 90 °, and FIG. 10 shows the tip portion of the cutting mechanism 3 immediately after the rotation angle exceeds 90 °. FIG.
[0034]
When cutting the sheet S, first, the drum 2 is rotated at a predetermined speed to give a constant feed to the film-like sheet S. On the other hand, the first and second rotating shafts 61 and 62 are synchronously rotated through a coupling mechanism (not shown).
[0035]
By the synchronous rotation of the first and second rotating shafts 61 and 62, the first and second eccentric shafts 65 and 66 rotate around the first and second rotating shafts 61 and 62, respectively, to perform a crank motion. . Then, the connecting member 39 performs a swinging motion, and the entire cutting mechanism 3 moves toward and away from the drum 2.
[0036]
When the rotation angle of the first and second rotary shafts 61 and 62 reaches the 90 ° state shown in FIG. 6 from the 0 ° state (FIG. 4) to the 45 ° state (FIG. 5), the cutting mechanism 3 The movable pad members 34 and 35 disposed at the front end of the drum abut against the sheet S on the outer peripheral surface of the drum.
[0037]
When the first and second rotating shafts 61 and 62 further rotate from this state and the cutting mechanism 3 attempts to further approach the drum 2 side, the respective moving pad members 34 and 35 at the front ends are springs 40 and 41 (see FIG. Retreating against the spring force of 2), as a result, the tip of the blade 31 is exposed outward from the respective moving pad members 34 and 35. Thereby, the tip of the blade 31 comes into contact with the sheet S and enters the sheet S (see FIGS. 7 and 8), and as a result, the sheet S is cut.
[0038]
Here, FIGS. 7 and 8 show states where the rotation angles of the first and second rotating shafts 61 and 62 are 135 ° and 180 °, respectively. The tip of the blade 31 is in contact with the sheet S immediately before the rotation angle of the first and second rotation shafts 61 and 62 reaches 135 °. Further, the blade 31 has entered the slit 22 of the drum 2 most deeply in the state shown in FIG.
[0039]
Next, the behavior of the movable pad members 34 and 35 when the rotation angles of the first and second rotating shafts 61 and 62 are around 90 ° will be described in more detail with reference to FIGS. 9 and 10.
FIG. 9 shows a state immediately before the rotation angle of the first and second rotating shafts 61 and 62 reaches 90 °. At this time, the end portion S _{1 of} the sheet S cut by the previous cutting process is shown. Is floating outward from the outer peripheral surface of the drum.
[0040]
When the first and second rotating shafts 61 and 62 further rotate from this state, the moving pad member 34 abuts against the end S ₁ of the sheet S and presses it against the drum outer peripheral surface (see FIG. 6). And when the rotation angle of the 1st, 2nd rotating shafts 61 and 62 exceeds 90 degrees, each moving pad member 34 and 35 will perform an elliptical motion, and with the drum 2 along the outer peripheral surface of the drum 2 Moving.
[0041]
As a result, as shown in FIG. 10, the sheet end S ₁ is held between the moving pad member 34 and the drum 2 without interfering with the fixed guide member 4, and the outer periphery of the fixed guide member 4 and the drum outer periphery. Move between the faces. That is, the sheet end S ₁ is transferred to the fixed guide member 4 side by the moving pad member 34.
[0042]
Next, when the rotation angle of the first and second rotating shafts 61 and 62 exceeds 180 °, the cutting mechanism 3 starts to move away from the drum 2. When the rotation angle of the first and second rotary shafts 61 and 62 reaches the state of 270 ° (FIG. 12) through the state of 225 ° (FIG. 11), the movable pad members 34 and 35 are moved from the outer peripheral surface of the drum. Start to leave. Then, the state returns to the state of 360 ° (FIG. 14), that is, the initial state (FIG. 4) through the state of the rotation angle of 315 ° (FIG. 13).
[0043]
Thus, according to the present embodiment, in the sheet cutting process, the cutting process is performed in a state where the vicinity of the sheet cutting part is held between the outer peripheral surface of the drum by the moving pad members 34 and 35. The cutting process of the film-like sheet S can be performed accurately.
[0044]
Further, in this case, the cut sheet end S ₁ is delivered to the fixed guide member 4 side by the moving pad members 34 and 35 that move together with the rotating drum 2. That is, the moving pad members 34 and 35 move together with the drum 2 toward the fixed guide member 4 in a state where the sheet end S ₁ is sandwiched between the moving pad members 34 and 35 and the drum 2. As a result, the sheet end S ₁ is moved to the fixed guide member side while being pressed by the moving pad members 34 and 35, so that the sheet end is fixed without lifting the cut sheet end from the outer peripheral surface of the drum. It can be smoothly delivered to the guide member side.
[0045]
Furthermore, according to the present embodiment, the blade 31 and the moving pad members 34 and 35 draw an approximately elliptical trajectory, so that when the sheet S is cut, the blade 31 and the moving pad members 34 and 35 are Since it moves together with the rotating drum 2, the cutting of the sheet S can be performed more accurately without causing a shift between the blade 31 and the sheet surface during the cutting of the sheet S. Thereby, the sheet can be cut while the drum 2 is continuously operated.
[0046]
In addition, by adopting the above configuration, a sheet cutting device that can smoothly transfer the sheet end portion to the fixed guide member side can be realized by a simple drive mechanism.
[0047]
【The invention's effect】
As described above, according to the sheet cutting apparatus according to the present invention, the cutting process is performed in a state where the vicinity of the sheet cutting portion is held by the moving pad member, so that the film sheet can be accurately cut. There is an effect to become. In addition, since the cut sheet end is transferred to the fixed guide member by the moving pad member that moves together with the drum, the cut sheet end can be smoothly transferred to the fixed guide member. There is.
[0048]
Furthermore, according to the present invention, since the blade and the moving pad member draw a substantially elliptical trajectory, the cutting process can be performed without causing a deviation between the blade and the sheet surface during the cutting process of the sheet. It will be more accurate. In addition, the sheet can be cut while continuously operating the drum.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a sheet cutting device according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a leading end portion of a cutting mechanism constituting the sheet cutting device.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 5 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 6 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 7 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 8 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 9 is a diagram for explaining the operation of the sheet cutting device, and is an enlarged view of the tip portion of the cutting mechanism.
FIG. 10 is a diagram for explaining the operation of the sheet cutting device, and is an enlarged view of a tip portion of the cutting mechanism.
FIG. 11 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 12 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 13 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 14 is a schematic diagram for explaining the operation of the sheet cutting device.
FIG. 15 is a schematic diagram for explaining the operating principle of the sheet cutting device.
FIG. 16 is a schematic diagram for explaining the operating principle of the sheet cutting device.
FIG. 17 is a schematic plan view of a conventional sheet cutting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sheet cutting device 2 Drum 21 Hole 22 Slit 3 Cutting mechanism 31 Blade 34, 35 Moving pad member 39 Connecting member 4, 5 Fixed guide member 6 Drive mechanism 61 1st rotating shaft 62 2nd rotating shaft 65 1st eccentricity Shaft 66 Second eccentric shaft S Film sheet S ₁ Sheet end e ₁ , e ₂ Eccentricity

Claims (3)

A sheet cutting device (1) for cutting a film-like sheet (S) ,
A drum (2) that rotates while giving a constant feed to the film-like sheet (S) wound around the outer periphery;
A fixed guide member (4, 5) disposed around the drum (2) for guiding the sheet (S) ;
A blade (31) for cutting the sheet (S) , a blade (31) disposed on the side of the blade (31) , and provided so as to be able to come in and out so as to come into contact with the sheet (S) on the outer peripheral surface of the drum, and a sheet cutting process A movable pad member (34, 35) having an abutting surface capable of holding the vicinity of a sheet cutting scheduled portion to be cut by the step and a sheet end portion (S ₁ ) which is a sheet cutting portion cut by the previous sheet cutting process ; A cutting mechanism (3) having a movable connecting member (39) connected to the rear end side of the blade (31) and the moving pad member (34, 35) ;
A driving mechanism (6) for driving the connecting member (39) so that the blade (31) and the moving pad member (34, 35) draw a locus of an elliptical motion;
At the time of cutting the sheet (S) , the vicinity of the planned sheet cutting portion to be cut by the sheet cutting processing and the sheet end portion (S ₁ ) that is the sheet cutting portion cut by the previous sheet cutting processing are moved to the moving pad member (34). , 35) is cut while being held between the drum and the outer peripheral surface of the drum, and after the cutting process , the moving pad member ( S ₁ ) moves with the rotating drum (2). 34) is moved to a gap between the fixed guide member (4) and the outer peripheral surface of the drum,
A sheet cutting apparatus. In the sheet cutting device (1) according to claim 1,
Drive mechanism (6), the first rotation axis (61), driving means for driving this, is arranged in a first rotational shaft (61), in synchronization with the first axis of rotation (61) The rotating second rotating shaft (62) and the tips of the first and second rotating shafts (61, 62) are provided eccentrically from the centers of the rotating shafts , rotate in the same phase, and are connected to the connecting member (39 ) And the first and second eccentric shafts (65, 66) that are rotatably supported by the connecting member (39) .
A sheet cutting apparatus. A sheet cutting method for cutting a film-like sheet (S),
A drum (2) that rotates while giving a constant feed to the film-like sheet (S) wound around the outer periphery, and a fixed guide member (4, 5) that is disposed around the drum (2) and guides the sheet (S). ) And a blade (31) for cutting the sheet (S), a movable pad member which can be moved in and out, which is disposed on the side of the blade (31) and can come into contact with the sheet (S) on the outer peripheral surface of the drum (34, 35) and a cutting mechanism (3) having a movable connecting member (39) connected to the rear end side of the blade (31) and the moving pad member (34, 35), and a blade (31 And a driving mechanism (6) for driving the connecting member (39) so that the moving pad member (34, 35) draws a substantially elliptical locus, in the sheet cutting device (1),
When cutting the sheet (S), the drum (2) is rotated to give a constant feed to the sheet (S), and the drive member (6) drives the connecting member (39) to move the blade (31) and move. By causing the pad members (34, 35) to draw a locus of an approximately elliptical motion, the vicinity of the sheet cutting scheduled portion to be cut by the sheet cutting process and the sheet end that is the sheet cutting position cut by the previous sheet cutting process (S ₁ ) Is held between the outer peripheral surface of the drum by the moving pad member (34, 35) and the sheet (S) is cut by the blade (31). After the cutting process, the sheet end (S ₁ ) Is moved to the gap between the fixed guide member (4) and the outer peripheral surface of the drum while being held by the moving pad member (34) that moves with the rotating drum (2).
A sheet cutting method characterized by the above.

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