JP3327727B2 - Sheet cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gravure rotary printing press,
The present invention relates to a sheet cutting device applied to a winding device such as a laminator for manufacturing a laminated web, a coating machine for coating a color ribbon or a magnetic tape.

[0002]

2. Description of the Related Art A conventional sheet cutting apparatus as shown in FIG. 6 is disclosed in Japanese Utility Model Publication No. 6-45352. The sheet cutting device 200 is provided in the vicinity of a sheet winding device (not shown) that winds a long sheet S, and a predetermined amount of paper is cut onto the paper tube 1 rotating around its own axis of the winding device. This is a device that automatically cuts the sheet body S when it is wound up, and allows a new winding by the winding device.

The cutting apparatus 200 includes a cutter support arm 202 rotatably supported about a horizontal axis 201 and a cylinder 204 for rotating the cutter support arm 202 about the horizontal axis 201.

[0004] A cutter blade 203 is attached to the tip of the cutter support arm 202. At the time of winding operation of the sheet S, the arm 202 is brought into a standby posture in which the arm 204 is flipped obliquely upward to the left around the horizontal axis 201 as shown by a solid line in FIG. When cutting S, it is rotated counterclockwise around the horizontal axis 201 to obtain the cutting posture indicated by the two-dot chain line. At this time, the sheet body S is cut by the cutter blade 203, and thereafter, both arms 202 return to the original standby posture. Since the surface of the paper tube 1 is coated with an adhesive, the sheet S on the upstream side cut by the cutter blade 203 adheres to the paper tube 1 and rotates counterclockwise around its own axis. Is wound around the paper tube 1 by the rotation of.

[0005]

The cutting operation of the sheet S by the cutting device 200 will be described in detail.
First, the support arm 202 is rotated counterclockwise around the horizontal axis 201 by the driving of the cylinder 204 from the state of the standby posture shown by the solid line in FIG. 6, whereby the cutter is turned as shown in FIG. The blade 203 comes into contact with the sheet body S, and the sheet body S comes into contact with and adheres to the surface of the paper tube 1 due to the pressing by the cutter blade 203.

Thereafter, the sheet body S is cut in the width direction by the cutter blade 203 as shown in FIG. 7B, and the cut upstream sheet body S is wound around the rotating paper tube 1. Can be

By the way, the paper tube 1 rotates so as to wind up the sheet body S of about 100 m in one minute, while the peripheral speed of the cutter blade 203 is lower than that, so that the cut upstream side is cut. At the leading end of the sheet body S, the sheet body S existing between the portion that is already adhered to the paper tube 1 and the leading end that abuts on the cutting edge of the cutter blade 203 is removed from the paper tube 1.
It becomes a state of loose by the rotation of.

Due to the looseness, as shown in FIG. 7B, the sheet body S is wound around the paper tube 1 with its front end part wrinkled. As shown in FIG. 7 (c), the formed roll R has a bulged portion R1 due to the wrinkles, thereby making the appearance unattractive and the sheet S pulled out from the roll R. Is formed due to the above-mentioned bulging portion R1, and the rolled sheet S becomes a defective product from the paper tube 1 of the roll R to a portion where the curl disappears, thereby lowering the product yield. However, there is a problem that the commercial value is reduced. In particular, if the bulging portion R1 extends to the outer surface of the roll R, inconvenience in handling such as the roll R after winding not rolling normally occurs.

In order to eliminate such inconvenience, the cylinder 2 is rotated to increase the rotation speed of the cutter support arm 202.
It is conceivable to improve the capacity of the cylinder 204, but for that purpose, it is necessary to take measures such as making the cylinder 204 a sturdy structure and increasing the fluid pressure supplied to the cylinder 204 as compared with the conventional case. A new problem arises.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and does not cause wrinkles at the cut end of a sheet wound around a paper tube. It is an object of the present invention to provide a sheet cutting apparatus that can obtain a cylindrical roll that is not formed.

[0011]

According to a first aspect of the present invention, there is provided a sheet cutting apparatus for winding a sheet on a paper tube at a winding position, and when a roll having a predetermined winding amount is formed. A sheet take-up device configured to move the roll to the removal position and move a new paper tube to the take-up position is provided, and a sheet body stretched upstream of the roll at the removal position is provided. In a sheet cutting apparatus that cuts in the width direction and adheres the cut end to the surface of the paper tube on the winding position that rotates around its own axis, the sheet cutting device is disposed outside both sides of the stretched sheet. A pair of supports, cutter means provided between the pair of supports, the cutter means being rotatable about a main axis, and cutter driving means for rotating the cutter means about the main axis are provided, and the cutter means is provided as described above. Cut the sheet body A cutter blade, and pressing means for pressing an end of the cut sheet body against the surface of the paper tube; and the cutter blade and the pressing device are positioned so as to face the surface of the paper tube. The driving unit is configured to rotate the cutter unit between a standby position in which the cutter blade does not cut the sheet member and a cutting position in which the cutter blade cuts the sheet member. Set the speed so that it is faster than the peripheral speed of the pipe surface .
Between the drive means for the cutter means and the spindle.
A speed increasing mechanism for increasing the driving speed of the driving means for the
What is kicked is characterized in.

According to a second aspect of the present invention, there is provided a sheet cutting apparatus according to the first aspect, wherein the support is rotatably supported around a base axis on a base end side. A support driving means for rotating the support between a standby posture in which the body is separated from the sheet body and a close posture in which the support is close to the sheet body is provided, and the cutter means includes: In this state, the sheet is provided so as to cross the sheet on the upstream side of the roll moved to the removal position.

According to a third aspect of the present invention, in the sheet cutting apparatus of the second aspect, a supporting arm is provided so as to be rotatable around the base axis. A press roller rotatable around the support shaft is provided.The press roller is configured so as to be able to abut on the paper tube in parallel via the sheet body, and the press roller is in a standby position in which the press roller is separated from the sheet body. A support arm driving means for rotating the support arm around a base axis between a sheet holding position and a sheet holding position in contact with a paper tube via a sheet body is provided.

According to a fourth aspect of the present invention, in the sheet cutting apparatus according to any one of the first to third aspects, the speed increasing mechanism is formed by a plurality of gears meshed with each other. It is characterized by having.

According to a fifth aspect of the present invention, in the sheet cutting apparatus according to any one of the first to fourth aspects, the pressing means is formed of a brush or a flexible material. It is characterized by being formed of a cylindrical body.

According to a sixth aspect of the present invention, in the sheet cutting apparatus according to any one of the first to fourth aspects, the pressing means is configured to cut the sheet by an air flow blown from a nozzle. It is characterized by being configured to press against a paper tube.

[0017]

According to the sheet cutting device of the first aspect, when a roll having a predetermined winding amount is formed on the paper tube at the winding position, the roll is moved to the roll removing position, A new paper tube is supplied to the winding position. Then, in a state where a new paper tube is supplied, the sheet member is in a state of being stretched in the front-rear direction along the support member in the standby posture. In this state, the cutter means is rotated around the main shaft by driving the cutter blade driving means to shift the cutter means from the standby posture to the cutting posture, whereby the cutter blade is stretched close to the surface of the paper tube. Since the provided sheet body is cut in the width direction and the pressing means presses the cut end against the surface of the rotating paper tube, the cut sheet body adheres to the paper tube and is wound up. Become.

Since the peripheral speed of the cutter means is set so as to be faster than the peripheral speed of the surface of the paper tube, the cutter blade after cutting the sheet body has a moving amount of the rotation of the paper tube. Is always larger than the amount of movement of the cut end due to
As a result, the cut end is not interfered with by the cutter blade, wrinkles are prevented from being formed on the cut end portion that is not adhered between the cutter blade and the paper tube, and the sheet body is formed by the action of the pressing means. Is adhered in a state of being in full surface contact with the surface of the substrate. Further, the drive mechanism for the cutter means is increased by the speed increasing mechanism.
The driving speed is increased.

According to the sheet cutting device of the second aspect, the driving device for the support is driven in a state where the sheet is stretched to rotate the support around the base axis. By bringing the cutter unit into the close posture, the cutter unit is in a state of facing the paper tube via the sheet body. In this state, the sheet body is cut by moving the cutter unit in the standby posture to the cutting posture, and winding on the paper tube is started. And
After the winding of the sheet into the paper tube is started, the driving device for the support is driven to return the support to the standby position, so that a storage space for storing the roll between the support and the paper tube is secured. Is done.

According to the sheet cutting apparatus of the third aspect, the support arm is rotated about the base axis by driving the support arm driving means in a state where the support is set in the close posture. , If you put it in the sheet holding position,
The pressing roller comes into contact with the paper tube via the sheet member, whereby the sheet member to be cut is stabilized and is easily cut.

According to the sheet cutting device of the fourth aspect , since the speed increasing mechanism is formed by a plurality of gears meshed with each other, it is easy to set the gear ratio of each gear appropriately. Accordingly, the driving speed of the cutter driving means is increased.

According to the sheet cutting apparatus of the fifth aspect , after the sheet is cut, the cut end is pressed against the surface of the paper tube by a brush or a tubular body.

According to the sheet cutting apparatus of the sixth aspect , after the sheet is cut, the cut end is pressed against the surface of the paper tube by the air flow blown out from the nozzle.

[0024]

1 is a partially sectional side view showing an example of a winding device to which a sheet cutting device according to the present invention is applied. As shown in the figure, a sheet winding device 100 is provided on the floor F to alternately wind the sheet S around a pair of paper tube mounting shafts 105 via the paper tube 1. The cutting device 2 according to the present invention is provided between a pair of left and right support columns P (FIG. 2) erected in the vicinity. In FIG. 1, regarding the cutting device 2, a solid line indicates a cutting posture extending in the horizontal direction, and a two-dot chain line indicates a standby posture in which the tip jumps upward.

The winding device 100 includes a base 101 erected on the floor F, a winding arm 104 provided on the top of the base 101, and both sides of the winding arm 104. A pair of left and right paper tube mounting shafts 105 extending in the horizontal direction, a support arm 106 fixed so as to cross the take-up arm 104,
And support rollers 107 rotatably supported around a horizontal axis at both ends.

The take-up arm 104 has a central portion provided on the top of the base 101 and a horizontal shaft 10 of a bearing 102.
3 is supported in a horizontal posture, and is intermittently rotated by 180 ° counterclockwise around the bearing 102 by driving of an arm driving means (not shown). The position of the paper tube mounting shaft 105 on the right side of the winding arm 104 in the horizontal position is the winding position X of the sheet S, and the position on the left is the removing position Y for removing the roll R of the wound sheet S. Is set as

A first horizontal axis P1 extends to the right between the pair of support columns P, and a second horizontal axis P2 extends to the upper left of the first horizontal axis P1. The position of the second horizontal axis P2 is
The height is set to substantially the same level as the paper tube mounting shaft 105 of the winding arm 104 in the horizontal posture. These horizontal axes P
A first roller P3 and a second roller P4 are rotatably supported by P1 and P2. Then, the sheet body S descending from above the support column P is guided by the lower part of the first roller P3 and the upper part of the second horizontal axis P2, and is fitted into the paper tube mounting shaft 105 at the winding position X. It is designed to be wound up.

Sheet S on paper tube 1 at winding position X
Is formed, the winding arm 104 rotates 180 degrees counterclockwise around the horizontal axis 103.
°, the roll R reaches the removal position Y. When the roll R reaches the removal position Y, the paper tube mounting shaft 105 that has newly reached the winding position X is driven to rotate by driving of a drive unit (not shown).

When the roll R reaches the removal position Y, as shown by a two-dot dashed line in FIG. It is in a state of being stretched between the two rollers P4. In such a stretched state, the sheet body S is cut in the width direction by the operation of the cutting device 2, and the downstream end of the separated upstream side sheet body S is newly positioned at the winding position X and rotated. Is supplied to the paper core 1 and a new sheet body S is wound up. The roll R located at the removal position Y is removed together with the paper core 1 from the paper core mounting shaft 105 after the cutting of the sheet body S, and a new paper core 1 is attached to the paper core mounting shaft 105.
Attached to.

The cutting device 2 of the present invention cuts the sheet S stretched between the support roller 107 and the second roller P4 in the width direction, and cuts the cut end of the right sheet S. Is attached to the take-up position X and is rotating.
5 for supplying to the surface. Hereinafter, the cutting device 2 of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a perspective view showing an example of the cutting apparatus of the present invention. As shown in FIG. 1, the cutting device 2 includes a cutting mechanism holder 3, a cutting mechanism 4 attached to the cutting mechanism holder 3, and a sheet body holding mechanism 5 for making it easier to cut the sheet S. A first driving means (supporting means driving means) 6 for driving the cutting mechanism 4, and a sheet pressing mechanism 5
And a second drive means (support arm drive means) 7 for driving the motor. Cutting mechanism holder 3
Is formed between a pair of support pillars P, and is switched between a proximity posture in which the leading end portion is close to the cut portion of the sheet body S by driving of the first driving means 6 and a standby posture in which the front end portion jumps up diagonally to the left. Has become possible.

The cutting mechanism 4 is provided at the distal end of the cutting mechanism holder 3 and is located on the downstream side of the sheet S pressed by the sheet pressing mechanism 5 onto the paper tube 1 of the paper tube mounting shaft 105. Is cut in the width direction.

In this embodiment, the cutting mechanism holder 3 includes a pair of left and right frame plates (supports) 31 provided between a pair of support columns P. The frame plate 31 is in sliding contact with a base shaft 32 whose base end (right side) is supported by a support hole 32a formed at a position above the second roller P4 of the pair of support columns P. And is rotatable around the base shaft 32 independently of the rotation of the base shaft 32 around its own axis.

The first driving means 6 has a support pillar P at the lower end.
A pair of left and right cylinders 61 which are operated by fluid pressure attached to the cylinder 61, and a cylinder rod 62 protruding from the upper part of the cylinder 61. It is connected. By moving the cylinder rod 62 up and down, the frame plate 31 rotates forward and backward around the base shaft 32,
As a result, switching can be performed between the standby posture that has jumped upward and the proximity posture that is close to the paper tube 1. The bottom of the cylinder 61 is rotatably supported around a support shaft 64 of a bracket 63 provided on the side of the support column P, so that the cylinder 61 can tilt when the cylinder rod 62 comes and goes. Has become.

The sheet holding mechanism 5 includes a pair of left and right support arms 51 and a pressing roller 53 supported by the pair of support arms 51. The base end of the support arm 51 is fitted around the base shaft 32 between the frame plates 31 of the base shaft 32 so as to be co-rotatable therewith. A support shaft 52 is provided on the distal end side between the pair of support arms 51, and the pressing roller 53 is rotatably supported around the support shaft 52. The pressing roller 53 is provided corresponding to the paper tube mounting shaft 105, and rotates the support arm 51 counterclockwise around the base shaft 32 so that the lower surface of the pressing roller 53 and the paper tube mounting shaft 105 are rotated. Are positioned so that the upper surface of the first member abuts on the other in the width direction.

In the present embodiment, the second drive means 7 includes a cylinder 71 which is operated by air pressure, and a cylinder rod 7 projecting downward from the lower end of the cylinder 71.
And 2. The lower end of the cylinder rod 72 is connected to a base shaft 3 via a connecting shaft 72a extending in the horizontal direction.
2, the base shaft 32 rotates forward and reverse around its own axis by the vertical movement of the cylinder rod 72, whereby the support arm 51 rotates together with the base shaft 32. It becomes a standby posture that jumped up,
The pressing roller 53 can be brought into an abutting posture (a sheet pressing posture) in contact with the paper tube 1.

The cutting mechanism 4 includes a pair of third driving means (driving means for cutter means) 41 provided on a pair of left and right frame plates 31 and a pair of speed increasing mechanisms operated by the third driving means 41. 42 and cutter means 43 connected to the pair of speed increasing mechanisms 42.

In this embodiment, the third driving means 4
1 is a third cylinder 41 provided on the outside of the frame plate 31.
and a cylinder rod 41b protruding forward from the third cylinder 41a. The third cylinder 41a is rotatably supported on the outer surface on the base end side of the frame plate 31 so as to be rotatable around the support shaft.

The speed increasing mechanism 42 includes a single gear 44 attached to the outer surface on the front end side of the frame plate 31 and a single gear 44.
, And a lower gear 46 that meshes with the intermediate gear 45. The one-side gear 44 is rotatably supported around an upper shaft 42a provided on the frame plate 31, the intermediate gear 45 is rotatably supported around the intermediate shaft 42b, and the lower gear 46 is a frame. Board 31
Are rotatably supported around a lower shaft (main shaft) 42c provided therethrough. An auxiliary roller 42d is provided on the intermediate shaft 42b so as to be rotatable around the axis.

The single gear 44 has a circular arc gear 44a having a tooth surface at a lower portion, and a lever portion 44b is protruded from an upper portion of the circular gear 44a. In the intermediate gear 45, a second gear 45b having a diameter slightly larger than that of the first gear 45a is integrally laminated.
Are meshed with the arc gear 44a, and the second gear 45b is meshed with the lower gear 46.

Further, the upper portion of the lever portion 44b of the single gear 44 and the tip of the cylinder rod 41b are connected to the coupling shaft 41.
The single gear 44 rotates around the upper shaft 42a when the cylinder rod 41b comes and goes. Accordingly, when the third driving means 41 is driven to project the cylinder rod 41b, the linear motion caused by the projection is converted into a rotational motion, and the circular gear 44 is sequentially rotated.
a, is transmitted to the lower gear 46 via the first gear 45a and the second gear 45b, and the lower gear 46 rotates counterclockwise around the lower shaft 42c. When the cylinder rod 41b is retracted, the lower gear 46 rotates clockwise about the lower shaft 42c.

The effective length of the lever 44b (the distance between the axis of the coupling shaft 41c and the axis of the upper shaft 42a).
Is smaller than the effective diameter of the arc gear 44a (the radius of the pitch circle of the arc gear 44a), and the effective diameter of the first gear 45a meshing with the arc gear 44a is larger than the effective diameter of the second gear 45b. Smaller and lower gear 46
Is smaller than the effective diameter of the second gear 45b.

The effective diameter of each gear, the effective length of the lever portion 44b, and the radius of the cutter blade 47 about the axis of the lower shaft 42c are determined in consideration of the speed of the cylinder rod 41b. The peripheral speed of the cutter blade 47 is set to be higher than the peripheral speed of the cutter blade 47.

The cutter means 43 includes a pair of left and right support arms 43a provided on each inner side surface of the pair of frame plates 31, and a long rectangular parallelepiped holder fixed to the tips of the support arms 43a and extending in the width direction. 43b, a cutter blade 47 and a brush member (pressing means) 48 fixed to the holder 43b.

Each of the support arms 43a is provided with an auxiliary roller 42d.
And is fixed to the lower shaft 42c of the pair of left and right lower gears 46 so as to rotate together with the lower shaft 42c around the axis. In addition, the holder 4
As shown in FIG. 3, 3b is fixed in a state of being extended over the ends of the pair of support arms 43a, and extends over the entire length of the holder 43b via a rubber buffer plate 43c on the tip end surface of the holder 43b. A long cutter blade 47 and a brush member 48 are fixed by screws. Note that the cutter blade 47 may be directly attached to the holder 43b without providing the buffer plate 43c.

A zigzag saw blade 47a is formed at the cutting edge of the cutter blade 47, and the sheet S cut by this has a saw blade shape as shown in FIG. In addition, the end faces of the brush member 48 extending in the width direction are arranged in two rows so as to be orthogonal to the direction in which the cutter blade 47 extends.
a is planted.

The dimensions of the support arm 43a, the brush member 48 and the brush 48a are such that the tip of the brush 48a around the axis of the lower shaft 42c is positioned on the surface of the paper tube 1 at the winding position X. Settings have been made. The cutter blade 47 can cut the sheet S stretched between the upper support roller 107 and the paper tube 1 by rotating clockwise around the lower shaft 42c of the cutter means 43. Dimensions are set.

The operation of the present invention will be described below. First, as shown in FIG. 1, immediately after the roll R is moved from the winding position X to the removing position Y, the frame plate 31 and the support arm 51 move upward around the base shaft 32 as indicated by a two-dot chain line. A state in which the sheet body S indicated by a two-dot chain line is stretched between the upper support roller 107 and the second roller P4 below the frame plate 31 and the support arm 51 while being flipped up. It has become. In this state, the first driving means 6 and the second driving means 7 are driven to bring the frame plate 31 into an approaching posture shown by a solid line near the sheet S, and the pressing roller 53 moves the sheet S in the direction of the paper tube 1. The sheet holding posture indicated by the pressed solid line is set. In this state, the cutting operation of the sheet S by the cutting device 2 is started.

Hereinafter, description will be made with reference to FIG. 4A shows a state immediately after the pressing roller 53 contacts the sheet S, and FIG. 4B shows a state in which the sheet S is sandwiched between the pressing roller 53 and the paper tube 1. (C) shows a state immediately after the sheet body S is cut by the cutter means 43, respectively.

First, in the state shown in (a), the blade edge of the cutter blade 47 is in a state immediately before contact with the sheet member S. Then, from the state shown in (a), the sheet body S is sandwiched between the press roller 53 and the paper tube 1 by the lowering of the press roller 53, and the support arm 43a is rotated around the lower shaft 42c by the rotation. The cutting edge of the cutter blade 47 comes into contact with the surface of the sheet body S as shown in (b).

In the state shown in (b), since the sheet S is pressed against the surface of the paper tube 1 by the pressing roller 53, the sheet S adheres to the adhesive layer 11 of the paper tube 1 and the paper S The winding of the tube 1 around the paper tube mounting shaft 105 in a counterclockwise direction starts to be wound around the paper tube 1 and at the same time, the supporting arm 4
The sheet body S is cut by the cutter blade 47 as shown in (c) by continuing the clockwise rotation of the lower shaft 42c around the lower shaft 42c of 3a.

In the present invention, the speed increasing mechanism 42
The peripheral speed of the cutter blade 47 is set to be faster than the peripheral speed of the surface of the sheet S by the paper tube 1 by the speed-up action, and the rotation of the support arm 43a about the lower shaft 42c causes the support arm 43a to rotate. The brush 48a provided at the front end pushes the sheet body S on the front end side from the portion adhering to the paper tube 1 toward the surface of the paper tube 1, and thereby the sheet body S as shown in (c). The entire surface of the end of the sheet sticks to the surface of the paper tube 1 by surface contact, so that wrinkling of the sheet S is reliably prevented.

FIG. 5 is a perspective view showing a state where the cut sheet is adhered to the paper tube. As shown in this figure, a plurality of pressure-sensitive adhesive layers 11 are formed on the outer peripheral surface of the paper tube 1 in which a pressure-sensitive adhesive is annularly applied at regular intervals.
The cut end of the sheet S is adhered in a state where the wrinkles do not depend on 1.

Then, the support arm 43a is rotated counterclockwise around the lower shaft 42c by the driving of the third driving means 41 to return to the original standby posture, and the first driving means 6
And the frame plate 31 and the support arm 51 are rotated clockwise around the base shaft 32 by the driving of the second driving means 7,
Each is returned to the standby posture indicated by the two-dot chain line in FIG. As a result, a space for winding the sheet S is secured below the frame plate 31, and the sheet S is wound around the paper tube 1 by rotating the paper tube mounting shaft 105 counterclockwise around its own axis. It is being done.

In the above embodiment, the cutter means 4 is used to press the cut end of the sheet S against the surface of the paper tube 1.
A brush 48a is implanted in the third brush member 48. Instead of the brush 48a, a cylindrical body made of rubber, soft synthetic resin, or foamable synthetic resin is provided over the entire length of the brush member 48 in the longitudinal direction. You may make it attach it. Then, since the tubular body presses the sheet S against the surface of the paper tube 1 while being elastically deformed by the flexibility of the material, the sheet S
Is securely adhered to the surface of the paper tube 1.

Instead of providing the brush 48a, a plurality of nozzles are attached to the brush member 48 in the longitudinal direction.
Compressed air may be supplied to these nozzles via a predetermined pipe, and the sheet may be pressed against the paper tube by the airflow blown out from the nozzles.

In the above embodiment, the paper tube 1 is made of paper, but instead of being made of paper, the tube 1 is made of synthetic resin such as vinyl chloride or metal such as iron or aluminum. Or a non-woven fabric. Further, the sheet body S is not limited to a paper-made one, but may be a synthetic resin film, an aluminum foil, a metal foil such as a copper foil, or a combination thereof.

In the above embodiment, the annular pressure-sensitive adhesive layer 11 is intermittently formed on the paper tube 1, but instead of providing the pressure-sensitive adhesive layer 11 intermittently, the entire surface of the paper tube 1 is replaced. May be formed with a pressure-sensitive adhesive layer. When an adhesive layer is formed on the entire surface, a spray-type paste may be applied by spraying. In order to intermittently provide the annular pressure-sensitive adhesive layer 11, a single-sided pressure-sensitive adhesive tape or a double-sided pressure-sensitive adhesive tape coated with a pressure-sensitive adhesive may be wound around the paper tube 1.

When the diameter of the paper tube 1 is changed,
This can be dealt with by changing the length of the support arm 43a, but without changing the length of the support arm 43a.
3a may be supported by the intermediate shaft 42b. Since the support arm 43a is supported by the intermediate shaft 42b in this manner, the rotation locus of the cutter unit 43 is changed.
It is possible to correspond to a paper tube having a diameter close to this locus.

Further, the counterclockwise rotational displacement of the frame plate 31 around the base shaft 32 can be adjusted, and the cutter means 43 can be rotated around the lower shaft 42c in accordance with the change in the diameter of the paper tube 1. If the rotational displacement of the frame plate 31 that does not collide with the paper tube 1 is set, the dimensions of the support arm 43a can be changed,
It is possible to cope with a change in the diameter of the paper tube 1 without performing a troublesome operation such as changing the lower shaft 42c from the lower shaft 42c to the intermediate shaft 42b.

Further, in the above-described embodiment, the speed increasing mechanism 42 is formed by a plurality of gears. Instead of using gears, a single lever rotatably supported around a predetermined axis is used. Alternatively, it is also possible to configure a speed increasing mechanism by combining a plurality of levers. In this case, the processing cost of the lever is lower than that of the gear.
Manufacturing cost can be reduced.

In addition, each of the driving means 6, 7, 41 may be replaced with a rotary actuator, an electric motor or the like instead of using a cylinder type using fluid pressure. Moreover, you may make it employ | adopt combining them.

[0063]

According to the sheet cutting apparatus of the first aspect of the present invention, the cutter means is driven around the main shaft by driving the cutter blade driving means to shift the cutter means from the standby posture to the cutting posture. As the cutter blade is turned, the cutter blade cuts the sheet body stretched close to the surface of the paper tube, and the pressing means presses the cut end against the surface of the rotating paper tube. It is cut and adheres to the paper tube, and is wound up.

Since the peripheral speed of the cutter means is set so as to be faster than the peripheral speed of the surface of the paper tube, the cutter blade after cutting the sheet body has a moving amount of rotation of the paper tube. Is always larger than the amount of movement of the cut end due to
As a result, the cut end is not interfered with by the cutter blade, wrinkles are prevented from being formed on the cut end portion that is not adhered between the cutter blade and the paper tube, and the sheet body is formed by the action of the pressing means. Is adhered in a state of being in full surface contact with the surface of the substrate.

As described above, since the sheet body can be wound around the paper tube in a state of complete surface contact without wrinkles at the cut end, the roll obtained has a swollen state due to wrinkles at the cut end. It does not occur and is advantageous in reducing the defective rate of the roll.

Further , the cutter means is driven by a speed increasing mechanism.
The driving speed of the cutter means is increased, and the peripheral speed of the cutter means is increased.
It is effective for speeding up.

According to the sheet cutting device of the second aspect of the present invention, the driving device for the support member is driven to rotate the support member around the base axis, thereby bringing the support member into the close posture. The cutter means faces the paper tube via the sheet body. In this state, the sheet body is cut by moving the cutter unit in the standby posture to the cutting posture, and winding on the paper tube is started.

After the winding of the sheet into the paper tube is started, the driving device for the support is driven to return the support to the standby position, whereby the roll is placed between the support and the paper tube. This is effective in increasing the diameter of the roll, because the storage space for storing is secured.

According to the sheet cutting apparatus of the third aspect of the present invention, the support arm is rotated about the base axis by driving the support arm driving means in a state where the support is set in the close posture. If it is moved to the sheet holding posture, the holding roller comes into contact with the paper tube via the sheet body, whereby the sheet body to be cut is stabilized, and the sheet body can be reliably cut. It is convenient.

According to the sheet cutting device of the fourth aspect of the present invention, since the speed increasing mechanism is formed by a plurality of gears meshed with each other, the speed increasing mechanism has a simple structure. It is possible to reduce the manufacturing cost.

According to the sheet cutting apparatus of the fifth aspect of the present invention, after the sheet is cut, the cut end is pressed against the surface of the paper tube by a brush or a tubular body, so that wrinkles are formed. This is convenient for adhering the sheet body to the paper tube so that the sheet body does not stick.

According to the sheet cutting apparatus of the sixth aspect of the present invention, after the sheet is cut, the cut end is pressed against the surface of the paper tube by the air flow blown out from the nozzle. This is convenient for adhering the sheet body to the paper tube so that the sheet does not become distorted.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a sheet cutting apparatus according to the present invention.

FIG. 2 is a perspective view of the sheet cutting apparatus of FIG. 1;

FIG. 3 is a perspective view showing an example of cutter means.

FIG. 4 is a partially enlarged side view showing a main part of the cutting device;
(A) is a state immediately before the sheet holding mechanism of the cutting device is in the sheet holding posture, and (b) is a state in which the sheet holding mechanism of the cutting device is in the sheet holding posture and the cutter means of the frame plate in the cutting posture is turned. (C) shows the state immediately after the sheet body has been cut by the cutter means.

FIG. 5 is a perspective view showing a state in which a sheet member is adhered to a paper tube.

FIG. 6 is a side view illustrating an example of a conventional sheet cutting apparatus.

FIG. 7 is a partially enlarged explanatory view showing a main part of the cutting device of FIG. 6, wherein FIG.
(B) is the state immediately after the sheet is cut, (c) is
The state in which the sheet body is wound around a paper tube is shown.

[Explanation of symbols]

 S Sheet 1 Paper core 11 Adhesive layer 100 Winding device 101 Base 102 Bearing 103 Horizontal axis 104 Winding arm 105 Paper tube mounting axis 106 Support arm 107 Support roller P Support column P1 First horizontal axis P2 Second horizontal axis P3 First roller P4 Second roller 2 Cutting device 3 Cutting mechanism holder 31 Frame plate (support) 32 Base shaft 32a Support hole 33 Bracket 4 Cutting mechanism 41 Third drive means (drive means for cutter means) 41a Third Cylinder 41b Cylinder rod 41c Coupling shaft 42 Speed increasing mechanism 42a Upper shaft 42b Intermediate shaft 42c Lower shaft (main shaft) 43 Cutter means 43a Support arm 48 Brush member 48a Brush (pressing means) 5 Sheet body pressing mechanism 51 Support arm 52 Support shaft 53 Pressing roller 54 Connecting rod 6 First driving means (support driving means) 61 Cylinder 62 Cylinder rod 7 Second drive means (support arm drive means) 71 Cylinder 72 Cylinder rod X Winding position Y Removing position

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B26D 1/25-1/62

Claims (6)

(57) [Claims] At a time when a roll having a predetermined winding amount is formed, the roll is moved to a removing position, and a new paper tube is moved to a winding position. A sheet winding device configured to be moved is provided, and a sheet stretched on the upstream side of the roll at the removal position is cut in a width direction, and the cut end is rotated around its own axis. In the sheet cutting apparatus for adhering to the surface of the paper tube on the position side, a pair of supports provided on both sides of the stretched sheet body and a main shaft provided between the pair of supports are provided. Cutter means rotatable, and cutter means driving means for rotating the cutter means about the main axis, the cutter means for cutting the sheet body,
Pressing means for pressing the cut end of the sheet body against the surface of the paper tube is provided.The cutter blade and the pressing device are positioned so as to face the surface of the paper tube, and the driving means for the cutter means includes: The cutter blade is configured to be able to rotate the cutter means between a standby posture in which the cutter blade does not cut the sheet body and a cutting posture in which the cutter blade cuts the sheet body. The speed is set so as to be faster than the peripheral speed, and a cutter is provided between the driving means for the cutter means and the spindle.
Speed increase mechanism for increasing the drive speed of the
Sheet cutting apparatus characterized by being. 2. The supporter according to claim 1, wherein the supporter is rotatably supported around a base axis on a base end side, and a standby posture in which the supporter is separated from the sheet body and a close-up posture in which the supporter is close to the sheet body. A support driving means for rotating the support between the rolls is provided, and the cutter means crosses the sheet body on the upstream side of the roll moved to the removal position in a state where the support is in the close posture. 2. The sheet cutting device according to claim 1, wherein the sheet cutting device is provided at a first position. 3. A support arm is provided so as to be rotatable around the base axis, and a press roller rotatable about the support shaft is provided at the distal end side of the support arm. Is configured to be able to abut against the tube in parallel,
A support arm driving unit for rotating the support arm around a base axis between a standby position in which the press roller is separated from the sheet body and a sheet press position in which the press roller contacts the paper tube via the sheet body is provided. The sheet cutting device according to claim 2, wherein the sheet cutting device is provided. Wherein said speed increasing mechanism is, claim 1, characterized in that it is formed by a plurality of gears meshed with each other
The sheet cutting device according to any one of claims 1 to 3 . Wherein said pressing means, sheet cutting apparatus according to any one of claims 1 to 4, characterized in that it is formed by a cylindrical body formed of a material having a brush or flexible. Wherein said pressing means, the sheet body according to any one of claims 1 to 4, characterized in that it is configured to press the sheet into a paper tube by the air flow blown out from the nozzle Cutting device.