JP2024004809A - Slitter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slitter device capable of suppressing a foreign matter from entering a roll formed by a slit sheet.

SOLUTION: A slitter device that slits a sheet traveling in a predetermined direction includes a plurality of winding units 20 that wind a slit sheet around a core material to form a roll. The winding unit 20 includes: a core material support 21 that supports the core material; an arm 22 that rotatably supports the core material support 21; and a power transmission mechanism 30 that transmits power from a rotary motor 23 to the core material support 21. The power transmission mechanism 30 includes a magnetic coupling M that transmits a rotational force from the rotary motor 23 to the core material support 21 in a non-contact manner.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a slitter device for slitting and winding a sheet.

Generally, a slitter device is equipped with a plurality of winding units that wind the slit sheet around a core material to form a roll, and the winding unit includes a core material support that supports the core material, and a core material support that supports the core material. It includes an arm that rotatably supports the body, and a power transmission mechanism that transmits power from a rotary motor to a core support (for example, see Patent Document 1). The power transmission mechanism described in Patent Document 1 includes a pulley and a belt provided within an arm.

However, in the conventional configuration, depending on the arrangement of the winding unit, abrasion powder generated in the power transmission mechanism may fall onto the sheet. That is, for example, when the power transmission mechanism of a winding unit is located above the roll formed by another winding unit, or when the power transmission mechanism is located above the roll formed by another winding unit, or when the power transmission mechanism is When the roller is located above the slit sheet, there is a risk that foreign matter (abrasion powder) may be mixed into the roll formed by the slit sheet.

Japanese Patent Application Publication No. 10-152251

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a slitter device that can prevent foreign matter from entering a roll formed by slit sheets.

In order to solve the above problems, the slitter device of the present invention is a slitter device that slits a sheet traveling in a predetermined direction, and comprises a plurality of windings that wind the slitted sheet around a core material to form a roll. The winding unit includes a core support that supports the core, an arm that rotatably supports the core support, and transmits power from a rotating motor to the core support. The power transmission mechanism is characterized in that the power transmission mechanism includes a magnetic coupling that transmits rotational force from the rotary motor to the core material support in a non-contact manner.

Moreover, it is preferable that at least a portion of the power transmission mechanism is provided within the arm.

Further, it is preferable that the power transmission mechanism of the winding unit is located above the rolls formed by other winding units.

Further, it is preferable that the power transmission mechanism is provided above a travel path of the sheet conveyed to the take-up unit.

Further, the power transmission mechanism includes a first shaft, a rotor, and a second shaft, and the magnetic coupling transmits rotational force from the rotary motor to the first shaft in a non-contact manner. a first magnetic coupling; a second magnetic coupling that transmits rotational force from the first shaft to the rotor in a non-contact manner; and a second magnetic coupling that transmits rotational force from the rotor to the second shaft in a non-contact manner. It is preferable to include a third magnetic coupling and a fourth magnetic coupling that transmits rotational force from the second shaft to the core material support in a non-contact manner.

The power transmission mechanism further includes a first shaft that transmits rotational force from one rotary motor to the plurality of winding units, the power transmission mechanism includes a rotor, and a second shaft, and the magnetic coupling a first magnetic coupling that transmits rotational force from the first shaft to the rotor in a non-contact manner; a second magnetic coupling that transmits rotational force from the rotor to the second shaft in a non-contact manner; It is preferable to include a third magnetic coupling that transmits rotational force from the second shaft to the core material support in a non-contact manner.

According to the present invention, it is possible to provide a slitter device that can prevent foreign matter from entering a roll formed by slit sheets.

1 is a schematic configuration diagram of a slitter device according to a first embodiment of the present invention. It is a schematic block diagram of the sheet winding part of the slitter apparatus based on the same embodiment. It is a schematic block diagram of the winding unit based on the same embodiment. It is a schematic block diagram of the slitter apparatus based on 2nd Embodiment of this invention. It is a schematic block diagram of the sheet winding part of the slitter apparatus based on the same embodiment. (A) and (B) are schematic configuration diagrams of a winding unit according to the same embodiment.

(First embodiment)
A slitter device 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. Note that the front-rear direction X, the left-right direction Y, and the up-down direction Z indicated by arrows in the figure are linear directions orthogonal to each other.

1 and 2 show the arrangement of the components of the slitter device 1. FIG.
As shown in FIG. 1, a slitter device 1 that slits a sheet S traveling in a predetermined direction includes a sheet unwinding section 1A, a sheet slitting section 1B, a sheet winding section 1C, and a plurality of sheet conveyance rollers 1D. It is equipped with The slitter device 1 manufactures a plurality of rolls 3 from a raw roll 2 by slitting the sheet S (that is, making cuts in the sheet S).

The sheet S to be slit is, for example, a separator film for a secondary battery that is configured to electrically insulate the positive electrode and negative electrode of the secondary battery and to allow ions in the electrolyte to pass therethrough. The raw fabric roll 2 is formed of a cylindrical core material 2A and a sheet S wound around the core material 2A. Further, the roll 3 is formed of a cylindrical core material 3A having a smaller width (dimension in the left-right direction Y) than the core material 2A, and a sheet S wound around the core material 3A.

The sheet unwinding section 1A includes a core material support body (not shown) that supports the core material 2A of the original fabric roll 2. The sheet unwinding section 1A unwinds the sheet S of the original fabric roll 2 by rotating the core material 2A together with its core material support.

The sheet slitting section 1B slits the sheet S so as to divide the sheet S at predetermined positions in the left-right direction Y. The sheet slitting section 1B of this embodiment includes slitter knives 11A and 11B that can cut the sheet S. The slitter knives 11A and 11B are a pair of round blades.

The sheet winding section 1C is arranged at the rear end of the slitter device 1. The sheet winding section 1C includes a core material support body 21 (see FIG. 2) that supports the core material 3A as a component of a winding unit 20 described later. The sheet winding section 1C rotates the core material 3A together with the core material support 21, thereby winding up the sheet S around the core material 3A. The core material support body 21 and the core material 3A are configured to move rearward as the diameter of the roll 3 increases as the sheet S is wound up. The core material 3A and the roll 3 shown by two-dot chain lines in FIG. 1 are arranged in a state where the core material 3A is moved backward. The core material support body 21 and the core material 3A move as an arm 22 (see FIG. 2), which will be described later, retreats.

The sheet conveying roller 1D conveys the sheet S unwound from the original fabric roll 2 to the sheet slitting section 1B, and conveys the sheet S slit by the sheet slitting section 1B to the sheet winding section 1C.

As shown in FIG. 2, the sheet winding section 1C includes a plurality of winding units 20. The winding unit 20 winds up the slit sheet S around the core material 3A to form the roll 3. In this embodiment, the sheet winding section 1C includes, as the winding units 20, a plurality of upper winding units 20A and a plurality of lower winding units 20B. The upper winding unit 20A and the lower winding unit 20B are provided with an interval in the vertical direction Z, and their constituent elements are arranged in an inverted state in the vertical direction Z.

Further, each of the plurality of upper winding units 20A and each of the plurality of lower winding units 20B are provided at intervals in the left-right direction Y. Specifically, the plurality of winding units 20 are arranged in the horizontal direction Y so that the roll 3 formed by the upper winding unit 20A and the roll 3 formed by the lower winding unit 20B do not overlap in the vertical direction Z. They are arranged in a staggered manner.

Each of the winding units 20 includes a right arm unit 20a that supports one end (right end) of the core material 3A, and a left arm unit 20b that supports the other end (left end) of the core material 3A. The arm units 20a, 20b are provided at intervals in the left-right direction Y, and the components of the arm units 20a, 20b are arranged in an inverted state in the left-right direction Y.

FIG. 3 is a sectional view showing a schematic configuration of the winding unit 20, and shows the arm 22 shown in FIG. 2 in cross section. In addition, in FIG. 3, the right arm unit 20a of the upper winding unit 20A is illustrated, and the illustration of the left arm unit 20b of the upper winding unit 20A and the arm units 20a, 20b of the lower winding unit 20B is omitted. .

As shown in FIG. 3, the winding unit 20 includes a core support 21, an arm 22, a rotary motor 23, and a power transmission mechanism 30 as components of each of the arm units 20a and 20b. .

The core material support body 21 includes a chuck mechanism (not shown) that holds the core material 3A, and supports the core material 3A by being inserted into the core material 3A. The sheet S is wound around the core material 3A by rotating the core material support body 21 while holding the core material 3A.

Further, the core support 21 includes a shaft portion 21a provided within the arm 22, and an annular magnet 21A provided on the shaft portion 21a. The shaft portion 21a is provided so as to extend in the left-right direction Y. The magnet 21A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the power transmission mechanism (specifically, the shaft 33 described later).

The arm 22 rotatably supports the core support 21 and accommodates the power transmission mechanism 30. The arm 22 is provided so as to be movable in the front-rear direction X with respect to the slitter device 1 . The arm 22 extends in the vertical direction Z, and has a distal end portion that supports the core support 21 and a proximal end portion where the rotation motor 23 is provided. In this embodiment, the arm 22 including the power transmission mechanism 30 of the upper winding unit 20A is provided so as to be located directly above the roll 3 formed by the lower winding unit 20B.

The rotary motor 23 is an electric motor that generates power for rotating the core support 21 . The rotary motor 23 of this embodiment is mounted on each arm unit 20a, 20b of the winding unit 20. The rotary motor 23 includes an output shaft 23a provided within the arm 22 and an annular magnet 23A provided on the output shaft 23a. The output shaft 23a is provided to extend in the left-right direction Y. The magnet 23A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the power transmission mechanism 30 (specifically, a shaft 31 to be described later).

The power transmission mechanism 30 is provided within the arm 22 and transmits power from the rotary motor 23 to the core support 21 . The power transmission mechanism 30 includes a shaft 31 (first shaft), a rotor 32, and a shaft 33 (second shaft). In FIG. 3, the rotor 32 is illustrated in cross section, and illustration of components that rotatably support the shafts 31 and 33 is omitted.

The shaft 31 extends in the vertical direction Z and is configured to be rotatable about an axis parallel to the vertical direction Z. The shaft 31 includes a cylindrical magnet 31A provided at one end and a cylindrical magnet 31B provided at the other end. The magnet 31A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the rotary motor 23. Further, the magnet 31B is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the rotor 32.

The rotor 32 is supported by a support shaft 22a provided on the arm 22, and is configured to be rotatable about an axis parallel to the left-right direction Y. The rotor 32 includes annular magnets 32A and 32B that rotate together. The magnet 32A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the shaft 31. Further, the magnet 32B is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the shaft 33. The rotor 32 amplifies and transmits the rotational force from the shaft 31 to the shaft 33. That is, the rotor 32 reduces the rotational speed of the shaft 31 and outputs it to the shaft 33.

The shaft 33 extends in the vertical direction Z and is configured to be rotatable about an axis parallel to the vertical direction Z. The shaft 33 includes a cylindrical magnet 33A provided at one end and a cylindrical magnet 33B provided at the other end. The magnet 33A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the rotor 32. The magnet 33B is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the core support 21.

With the above configuration, the power transmission mechanism 30 of this embodiment includes a plurality of magnetic couplings M1 to M4 as magnetic couplings M (so-called magnetic gears). The magnetic coupling M transmits rotational force from the rotary motor 23 to the core support 21 in a non-contact manner. The configuration of each of the magnetic couplings M1 to M4 will be explained below.

The first magnetic coupling M1 includes magnets 23A and 31A provided on the rotary motor 23 and the shaft 31, and transmits rotational force from the rotary motor 23 to the shaft 31 in a non-contact manner. That is, when the output shaft 23a of the rotary motor 23 rotates together with the magnet 23A, the shaft 31 rotates together with the magnet 31A due to the magnetic force generated between the magnets 23A and 31A.

The second magnetic coupling M2 is composed of magnets 31B and 32A provided on the shaft 31 and the rotor 32, and transmits rotational force from the shaft 31 to the rotor 32 in a non-contact manner. That is, when the shaft 31 rotates together with the magnet 31B, the rotor 32 rotates together with the magnet 32A due to the magnetic force generated between the magnets 31B and 32A.

The third magnetic coupling M3 is configured by magnets 32B and 33A provided on the rotor 32 and the shaft 33, and transmits rotational force from the rotor 32 to the shaft 33 in a non-contact manner. That is, when the rotor 32 rotates together with the magnet 32B, the shaft 33 rotates together with the magnet 33A due to the magnetic force generated between the magnets 32B and 33A.

The fourth magnetic coupling M4 includes magnets 33B and 21A provided on the shaft 33 and the core support 21, and transmits rotational force from the shaft 33 to the core support 21 in a non-contact manner. That is, when the shaft 33 rotates together with the magnet 33B, the core support 21 rotates together with the magnet 21A due to the magnetic force generated between the magnets 33B and 21A.

This embodiment provides the following effects.
(1) Since the power transmission mechanism 30 is composed of a magnetic coupling M that transmits rotational force from the rotary motor 23 to the core support 21 without contact, it is compared to a case where it is composed only of a pulley and a belt. Therefore, generation of wear powder in the power transmission mechanism 30 can be suppressed. Therefore, it is possible to prevent foreign matter from entering the roll 3 formed by the slit sheets S. Further, since no abrasion powder is generated, the slitter device 1 can be configured with low maintenance. In addition, since rotational force is transmitted without contact, it is expected that quietness will be improved, mechanical parts will be smaller, and the degree of freedom in arrangement will be improved.

(2) The power transmission mechanism 30 is provided within the arm 22. Therefore, the arm 22 that supports the core support 21 can cover and protect the power transmission mechanism 30.

(3) The power transmission mechanism 30 of the upper winding unit 20A is provided above the roll 3 formed by the lower winding unit 20B. Therefore, the sheet winding section 1C constituted by the winding unit 20 can be made compact in the front-rear direction X and the left-right direction Y, and it is possible to prevent foreign matter from entering the roll 3 formed by the lower winding unit 20B. .

(4) Magnetic coupling M includes four magnetic couplings M1 to M4. Therefore, it is possible to configure the rotary motor 23 and the core material support 21 so that they are not coaxially disposed using the magnetic couplings M1 to M4, so that the interval between adjacent core material supports 21 can be narrowed (i.e., the sheet (The dividing width of S can be made small), and a roll 3 with a small width can be formed. Furthermore, the rotor 32 can amplify and transmit the rotational force from the rotary motor 23 to the core support 21 .

(Second embodiment)
A slitter device 1 according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 6. Note that the same components as in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

4 and 5 show how the components of the slitter device 1 are arranged.
As shown in FIG. 4, the sheet winding section 1C according to this embodiment is arranged at the upper part of the slitter device 1. The sheet winding section 1C includes a core material support body 51 (see FIG. 5) that supports the core material 3A as a component of a winding unit 50 described later. The sheet winding section 1C rotates the core material 3A together with the core material support 51, thereby winding up the sheet S around the core material 3A. As the diameter of the roll 3 increases as the sheet S is wound up, the core material support 51 and the core material 3A are configured to move obliquely upward. The core material 3A and the roll 3 shown by two-dot chain lines in FIG. 4 are arranged in a state where the core material 3A is moved obliquely upward. The core material support body 51 and the core material 3A move as an arm 52, which will be described later, swings about an axis P parallel to the left-right direction Y.

As shown in FIG. 5, the sheet winding section 1C according to the present embodiment includes a plurality of rotary motors 41 provided outside the winding unit 50, and a plurality of shafts 42 (first and second shafts) connected to the rotary motors 41. shaft). In this embodiment, the sheet winding section 1C includes a front rotation motor 41A and a rear rotation motor 41B as the rotation motor 41, and a front shaft 42A and a rear shaft 42B as the shafts 42. .

The rotary motor 41 is an electric motor that generates power for rotating the core support 51. The front rotation motor 41A generates power for rotating the core support 51 of the front winding unit 50A, which will be described later, and the rear rotation motor 41B generates power for rotating the core support 51 of the rear winding unit 50B, which will be described later. Generates the power to rotate.

The shaft 42 extends in the left-right direction Y and is configured to be rotatable about an axis parallel to the left-right direction Y. The shaft 42 transmits rotational force from one rotary motor 41 to the plurality of winding units 50. The front shaft 42A transmits rotational force from the front rotary motor 41A to a plurality of front winding units 50A, which will be described later.The rear shaft 42B transmits rotational force from the rear rotary motor 41B to a plurality of rear winding units 50B, which will be described later. transmit power. The shaft 42 includes a plurality of cylindrical magnets 42C. The magnet 42C is magnetized so that N poles and S poles appear alternately along the circumferential direction on a cylindrical surface facing a rotor 61 of a power transmission mechanism 60, which will be described later.

Further, the sheet winding section 1C includes a plurality of winding units 50 that wind up the slit sheet S around the core material 3A to form the roll 3. In this embodiment, the sheet winding section 1C includes, as the winding units 50, a plurality of front winding units 50A and a plurality of rear winding units 50B. The front winding unit 50A and the rear winding unit 50B are provided with an interval in the front-rear direction X.

Each of the plurality of front winding units 50A and each of the plurality of rear winding units 50B are provided at intervals in the left-right direction Y. Specifically, the plurality of winding units 50 are arranged in the left-right direction Y so that the roll 3 formed by the front winding unit 50A and the roll 3 formed by the rear winding unit 50B do not overlap in the front-rear direction X. They are arranged in a staggered manner. Each of the winding units 50 is constituted by an arm unit that supports only one end (left end or right end) of the core material 3A.

FIG. 6 is a diagram showing a schematic configuration of the winding unit 50, with FIG. 6(A) being a sectional view and FIG. 6(B) being a side view. FIG. 6(A) shows a cross section of the arm 52 shown in FIG. 5, etc., and also shows a cross section along line AA (dotted chain line) in FIG. 6(B). Note that in FIG. 6, the rear winding unit 50B is illustrated, and the illustration of the front winding unit 50A is omitted.

As shown in FIGS. 6A and 6B, the winding unit 50 includes a core support 51, an arm 52, and a power transmission mechanism 60. In FIG. 6, illustration of the components that support the arm 52 so as to be able to swing around the axis P is omitted.

The core support 51 includes a chuck mechanism like the core support 21, and supports the core 3A by being inserted into the core 3A. The sheet S is wound around the core material 3A by the core material support body 51 rotating together with the core material 3A. The core support 51 includes an annular magnet 51A facing the arm 52. The magnet 51A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the power transmission mechanism 60 (specifically, a shaft 62 described later).

The arm 52 rotatably supports the core support 51 and accommodates at least a portion of the power transmission mechanism 60. Specifically, the arm 52 has a linearly formed recess 52a, and a part of the power transmission mechanism 60 (a shaft 62 to be described later) is housed in the recess 52a. The arm 52 is provided so as to be swingable about an axis P parallel to the left-right direction Y. The arm 52 has a distal end portion that supports the core support 51 and a proximal end portion disposed on the same axis as the axis P. ) is inserted, so that the arm 52 is swingably supported. In this embodiment, the arm 52 including the power transmission mechanism 60 of the winding unit 50 is arranged directly above the travel path of the sheet S.

The power transmission mechanism 60 is provided within the arm 52 and transmits power from the rotary motor 41 to the core support 51. The power transmission mechanism 60 includes a rotor 61 and a shaft 62 (second shaft). In FIG. 6(A), the rotor 61 is illustrated in cross section. Further, in FIG. 6, illustration of components that rotatably support the shaft 62 is omitted.

The rotor 61 is supported by a part of the arm 52 and is configured to be rotatable about an axis P parallel to the left-right direction Y. The rotor 61 includes annular magnets 61A and 61B that rotate together. The magnet 61A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the cylindrical surface facing the shaft 42. Further, the magnet 61B is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the shaft 62.

The shaft 62 extends from the base end to the distal end of the arm 52, and is configured to be rotatable about an axis extending in the front-rear direction X. The shaft 62 includes a cylindrical magnet 62A provided at one end and a cylindrical magnet 62B provided at the other end. The magnet 62A is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the rotor 61. The magnet 62B is magnetized so that N poles and S poles appear alternately along the circumferential direction on the side surface facing the core support 51.

With the above configuration, the power transmission mechanism 60 of this embodiment includes a plurality of magnetic couplings M1 to M3 as the magnetic coupling M. The magnetic coupling M transmits rotational force from the rotary motor 41 to the core support 51 in a non-contact manner. The configuration of each of the magnetic couplings M1 to M3 will be explained below.

The first magnetic coupling M1 includes magnets 42C and 61A provided on the shaft 42 and the rotor 61, and transmits rotational force from the shaft 42 to the rotor 61 in a non-contact manner. That is, when the shaft 42 rotates together with the magnet 42C, the rotor 61 rotates together with the magnet 61A due to the magnetic force generated between the magnets 42C and 61A.

The second magnetic coupling M2 includes magnets 61B and 62A provided on the rotor 61 and the shaft 62, and transmits rotational force from the rotor 61 to the shaft 62 without contact. That is, when the rotor 61 rotates together with the magnet 61B, the shaft 62 rotates together with the magnet 62A due to the magnetic force generated between the magnets 61B and 62A.

The third magnetic coupling M3 includes magnets 62B and 51A provided on the shaft 62 and the core support 51, and transmits rotational force from the shaft 62 to the core support 51 in a non-contact manner. That is, when the shaft 62 rotates together with the magnet 62B, the core support 51 rotates together with the magnet 51A due to the magnetic force generated between the magnets 62B and 51A.

This embodiment provides the following effects.
(5) Since the power transmission mechanism 60 is composed of a magnetic coupling M that transmits rotational force from the rotary motor 41 to the core support 51 without contact, it is compared to a case where it is composed only of a pulley and a belt. Therefore, generation of wear powder in the power transmission mechanism 60 can be suppressed. Therefore, it is possible to prevent foreign matter from entering the roll 3 formed by the slit sheets S. Further, since no abrasion powder is generated, the slitter device 1 can be configured with low maintenance. In addition, since rotational force is transmitted without contact, it is expected that quietness will be improved, mechanical parts will be smaller, and the degree of freedom in arrangement will be increased.

(6) A portion of the power transmission mechanism 60 (shaft 62) is provided within the arm 52. Therefore, the arm 52 that supports the core support 51 can cover and protect the power transmission mechanism 60.

(7) The power transmission mechanism 60 is provided above the travel path of the sheet S conveyed to the winding unit 50. Therefore, by providing the sheet winding section 1C above the travel path of the sheet S, the slitter device 1 can be made more compact, and it is possible to prevent foreign matter from entering the roll 3.

(8) The slitter device 1 includes a shaft 42, and the magnetic coupling M includes three magnetic couplings M1 to M3. Therefore, it is possible to configure the rotary motor 41 and the core material support 51 so that they are not coaxially disposed using the magnetic couplings M1 to M3, so that the interval between adjacent core material supports 51 can be narrowed (i.e., the sheet The dividing width of S can be made small), and a plurality of rolls 3 with small widths can be formed.

The present invention is not limited to the embodiments described above, and the configuration described above can be modified. For example, the following changes can be made and implemented, or the following changes can be combined and implemented.

- The configuration of the winding units 20 and 50 may be changed as appropriate. For example, the arm units 20a and 20b including the arm 22 may be fixed to the slitter device 1. Furthermore, the components of the arm units 20a, 20b do not have to be arranged in an inverted state in the left-right direction Y (that is, they do not have to be symmetrical), for example, only one of the arm units 20a, 20b It may also include a rotating motor. Moreover, the components of the upper winding unit 20A and the lower winding unit 20B do not have to be arranged in a reversed state in the vertical direction Z (that is, they do not have to be vertically symmetrical).

- The configurations of the power transmission mechanisms 30 and 60 may be changed as appropriate. That is, the present invention is not limited to the power transmission mechanism described in the above embodiments, as long as the power transmission mechanism includes a magnetic coupling that transmits rotational force in a non-contact manner. Further, the arrangement of the power transmission mechanisms 30 and 60 may be changed as appropriate. For example, the arm 22 including the power transmission mechanism 30 of the upper winding unit 20A may not be placed directly above the lower winding unit 20B, and the arm 22 including the power transmission mechanism 60 of the winding units 50A and 50B. does not need to be placed directly above the travel path of the seat S.

- The configuration of the sheet slit portion 1B may be changed as appropriate. That is, for example, the sheet slit portion may slit the sheet by laser cutting, and may include a razor blade instead of the round blade slitter knives 11A and 11B. Further, for example, the sheet slit portion may slit the sheet by laser cutting using a laser emission unit, or may slit the sheet by heat cutting using a heat unit.

1 Slitter devices 2, 3 Rolls 2A, 3A Core material 1A Sheet unwinding section 1B Sheet slitting section 1C Sheet winding section 1D Sheet transport rollers 11A, 11B Slitter knives 20, 20A, 20B Winding units 20a, 20b Arm unit 21 Core Material support body 22 Arm 23 Rotating motor 30 Power transmission mechanism 31 Shaft (first shaft)
32 Rotor 33 Shaft (second shaft)
41, 41A, 41B Rotating motor 42, 42A, 42B Shaft (first shaft)
50, 50A, 50B Winding unit 51 Core support 52 Arm 60 Power transmission mechanism 61 Rotor 62 Shaft (second shaft)
M, M1 to M4 Magnetic coupling S Seat X Front-rear direction Y Lateral direction Z Vertical direction

Claims (6)

A slitter device that slits a sheet traveling in a predetermined direction,
comprising a plurality of winding units that wind the slitted sheet around a core material to form a roll;
The winding unit includes:
a core material support that supports the core material;
an arm rotatably supporting the core support;
A power transmission mechanism that transmits power from the rotating motor to the core material support,
The slitter device is characterized in that the power transmission mechanism includes a magnetic coupling that transmits rotational force from the rotary motor to the core material support in a non-contact manner. The slitter device according to claim 1, wherein at least a portion of the power transmission mechanism is provided within the arm. The slitter device according to claim 1, wherein the power transmission mechanism of the winding unit is located above the rolls formed by other winding units. The slitter device according to claim 1, wherein the power transmission mechanism is provided above a travel path of the sheet conveyed to the take-up unit. The power transmission mechanism includes a first shaft, a rotor, and a second shaft,
The magnetic coupling is
a first magnetic coupling that transmits rotational force from the rotary motor to the first shaft in a non-contact manner;
a second magnetic coupling that transmits rotational force from the first shaft to the rotor in a non-contact manner;
a third magnetic coupling that transmits rotational force from the rotor to the second shaft in a non-contact manner;
The slitter device according to claim 1, further comprising: a fourth magnetic coupling that transmits rotational force from the second shaft to the core support in a non-contact manner. comprising a first shaft that transmits rotational force from one rotary motor to a plurality of winding units;
The power transmission mechanism includes a rotor and a second shaft,
The magnetic coupling is
a first magnetic coupling that transmits rotational force from the first shaft to the rotor in a non-contact manner;
a second magnetic coupling that transmits rotational force from the rotor to the second shaft in a non-contact manner;
The slitter device according to claim 1, further comprising: a third magnetic coupling that transmits rotational force from the second shaft to the core support in a non-contact manner.

Images