JPH0725055B2 - Slitter drive unit capable of extremely narrow shear cut - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter knife drive unit of a slitter device for slitting a band-shaped material such as a paper sheet.

[0002]

2. Description of the Related Art Drive units for slitter knives of conventional slitter devices of this type have a slitter knife mounting disk mounted directly on the motor shaft at high speeds, or a through key shaft or spline for low speed slitters. A method of driving a shaft and attaching a slitter knife mounting disk to an output shaft of a gear box has been adopted.

An example of the structure of such a conventional slitter drive unit is shown in a schematic sectional view in FIG.
FIG. 6 shows an example of an NC slitter using the unit of FIG. As shown in FIG. 6, in this NC slitter, the upper blade 73 is attached to the upper blade holder 77 provided so as to be moved along the upper slide beam 78. The upper blade holder 77 is moved to a desired slitting position by the moving screw 79 and the moving motor 80. The lower blade 37 and the lower blade driving key shaft 8 shown in detail in FIG. 4 are grouped in association with the lower blade driving gear box 72. The lower blade driving gear box 72 can be moved along the lower slide beam 74.
The lower blade drive gear box 72 includes a moving screw 75.
And is moved to a desired slitting position by the moving motor 76. The sheet 70 to be slit is passed between the upper blade 73 and the lower blade 37 by the feed roll 71 in the arrow direction. As shown in FIG. 4, this conventional slitter drive unit includes a rotary shaft 4 which penetrates the case 1 and is supported by two bearings 2 and 3 so as to be rotatable in the case 1. ing. Case 1 of this rotating shaft 4
The tip portion projecting forward from the slitter knife mounting disk 5 so that it can rotate together with the rotary shaft 4.
Is attached. On the other hand, a drive gear 10 is attached to a portion of the rotary shaft 4 inside the case 1 so as to rotate together with the rotary shaft 4. A drive gear 9 provided on the through key shaft 8 is engaged with the driven gear 10, and the rotation of the key shaft 8 causes the rotation shaft 4 to be rotationally driven in the case 1. There is. Then, for the slitter knife mounting disk 5, the knife holder 6 and the mounting nut 7 are used.
For example, the slitter knife 37 for the lower slitter blade is attached and fixed, and is rotated by the rotation of the rotary shaft 4.

[0004]

As described above, in the conventional slitter drive unit of the gear box type, two
A slitter knife mounting disk is attached to the tip of the rotating shaft supported by individual bearings that protrudes outward from the case, and drive gears for rotating the shaft itself are attached separately at intervals in the case. Since it is a shaft drive system, it is impossible to make the width of the drive unit itself narrow, for example, 100 mm or less. Therefore, it is impossible to set the slit width of the slitter device to 100 mm or less.

For this reason, when it is desired to obtain a slit width smaller than that, a roll slitter or the like must be used conventionally. FIG. 5 is a schematic view of an example of this conventional roll slitter. As shown schematically in FIG. 5, the roll slitter has five
A large number of bowl-shaped knife elements with a narrow width of 10 mm or 1 mm
2F, 12B, ..., 12F arranged and sandwiched are used as lower slitter blades, and the plate-type upper blade knives 13 and 14 are set to have desired narrow slit width intervals, and the corresponding bowls are used. It is adapted to be engaged with the mold knife elements 12C and 12G.

However, when such a conventional roll slitter is used, replacement of the bowl-shaped knife element is
Even if one defective bowl-shaped knife element is replaced, all the other bowl-shaped knife elements must be removed, which requires a great deal of work, and the width that can be slit is different for each bowl-shaped knife element. Since it is restricted by the width of the slit, it is not possible to continuously obtain an arbitrary slit size, which causes a great inconvenience.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a slitter drive unit capable of performing an extremely narrow shear cut.

[0008]

A slitter drive unit according to the present invention has a case having a flat inner space whose one side is substantially open, and a slitter drive unit extending to the open side by substantially the width of the inner space. A central shaft fixed to the case and a slitter knife mounting disc substantially embedded in the interior space and mounted for rotation about the central shaft via cross roller bearings. The front surface of the case of the slitter knife mounting disk on the open side can be mounted and fixed with the slitter knife, and the periphery of the rear end portion of the slitter knife mounting disk is the rotational driving force of the rotary drive device. It is characterized in that it can be engaged by a transmission member.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, based on FIGS. 1 to 3 of the accompanying drawings,
The present invention will be described in more detail with reference to examples of the present invention.

FIG. 1 is a side view showing the whole of a slitter drive unit as one embodiment of the present invention, and this slitter drive unit is applied as a lower blade drive device of a slitter device. As shown in FIG. 1, the slitter drive unit of this embodiment includes a rotation drive device 30 and a rotation drive device 40, which are arranged at intervals on a side surface of a unit base 20, and is rotated. The drive device 30 and the rotary drive device 40 are connected by a rotary drive force transmission belt 50 as a rotary drive force transmission member. In FIG. 1, reference numeral 60 is disposed on the side surface of the unit base 20 between the driven device 30 and the rotational driving device 40, and the rotational driving force transmission belt 50 is provided.
2 shows a tension device for applying a desired tension to.

FIG. 2 is an enlarged cross-sectional view of the rotary driven device 30 of the slitter drive unit shown in FIG. As best shown in FIG. 2, the rotationally driven device 30 of this embodiment.
Includes a case 31 which may be formed as part of the unit base 20. This case 31 is very narrow with one side (the left side in FIG. 2) being substantially open,
That is, it has a flat internal space 31A. A central shaft 32 is fixed to the case 31 with bolts 33.
It has a length that extends substantially toward the open side of A by the width of this internal space 31A.

The driven device 30 further comprises a slitter knife mounting disk 35, which is substantially embedded in the internal space 31A of the case 31 and which has the fixed central shaft 3.
It is mounted via a single cross roller bearing 34 so that it can rotate around 2. The slitter knife 37 can be mounted and fixed to the front surface 35A of the slitter knife mounting disk 35 by using bolts 36. On the other hand, the periphery of the rear end portion 35B of the slitter knife mounting disk 35 constitutes a pulley on which a rotary driving force transmission belt 50 of a rotary driving device 40 described later can be hung. Here, the cross roller bearing will be explained. The cross roller bearing has heretofore been used as the joint part and the turning part of the industrial robot, the manipulator rotating part, the precision rotary table, the medical device, the measuring instrument, the IC manufacturing device, etc. For example, cylindrical rollers are arranged alternately on the 90 ° V-groove rolling surface through a spacer retainer, and are arranged orthogonally to each other. With one bearing, radial load, thrust load, moment load, etc. The load of all directions can be applied, and the dimensions of the inner and outer rings are minimized.

FIG. 3 is an enlarged cross-sectional view of the rotary drive device 40 of the slitter drive unit of FIG. As best shown in FIG. 3, the rotary drive device 40 of this embodiment is
Case 4 that may be formed as part of the unit base 20
1 is provided. The case 41 has an extremely narrow inner space 41A. The rotary drive device 40 of this embodiment further includes a rotary member 44, and the rotary member 44 includes the internal space 41 of the case 41.
Only one cross roller bearing 43 is embedded in A and is rotatable relative to its case 41.
Is attached through. The rotating member 44 is fixed around a through key shaft 42 extending through the case 41, and is rotated together with the rotation of the key shaft 42. Furthermore, the rotating member 4
The periphery of the rear end portion 44A of 4 is the rotational driving force transmission belt 50.
It constitutes a pulley that can be hung on.

Next, the operation of such a slitter drive will be briefly described. When the through key shaft 42 is rotated by the rotary drive device (not shown) of the slitter device, the rotating member 44 is rotated together with it in the case 41. Then, this rotational driving force is transmitted to the slitter knife mounting disk 35 via the belt 50. Accordingly, the slitter knife mounting disk 35 is rotated within the case 31 about the fixed central shaft 32. As a result, the slitter knife 37 mounted on the front surface 35A of the slitter knife mounting disk 35 is rotationally driven.

Although the belt 50 is used as the rotational driving force transmitting member in the above-described embodiment, the present invention is not limited to this. For example, the periphery of the rear end of the rotating member 44 is not a pulley structure but a gear structure, and the slitter knife mounting disk 3
The periphery of the rear end portion of 5 may not be a pulley structure, but may be a gear structure so that the gear structures are drivingly engaged with each other to transmit the rotational force.

[0016]

As described above, according to the present invention, the slitter knife mounting disk and the drive pulley and gears for rotating the disk are integrated, and the central shaft is fixed so as not to rotate. The cross roller bearing supports the rotation of the slitter knife mounting disc, and the slitter knife mounting disc is embedded in the case so that only the slitter knife is exposed to the outside of the case. it can.

For example, according to the present invention, the width of the slitter drive unit can be set to 100 mm or less and 50 mm or less. Therefore, when such a slitter drive unit is used, a slitter device capable of shearing a very narrow width can be provided. Can be configured.

Moreover, according to the present invention, unlike the conventional roll slitter, when the slitter knife becomes defective, only the defective slitter knife needs to be replaced and the slit width can be selected. It is also possible to set continuous narrow values.

[Brief description of drawings]

FIG. 1 is a side view showing an entire slitter drive unit as one embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a rotated drive device of the slitter drive unit of FIG.

3 is an enlarged cross-sectional view of a rotary drive device of the slitter drive unit of FIG.

FIG. 4 is a schematic sectional view showing an example of the structure of a conventional slitter drive unit.

FIG. 5 is a schematic view of an example of a conventional roll slitter.

FIG. 6 is a schematic side view showing the overall structure of an NC slitter using the slitter drive unit shown in FIG.

[Explanation of symbols]

 20 Unit Base 30 Rotation Driven Device 31 Case 31A Internal Space 32 Center Shaft 34 Cross Roller Bearing 35 Slitting Knife Mounting Disc 35A Front of Slitter Knife Mounting Disc 35B Rear End of Slitting Knife Mounting Disc 36 Bolt 37 Slitting Knife 40 Rotation Driving Device 41 Case 41A Internal space 42 Through key shaft 43 Cross roller bearing 44 Rotating member 44A Rotating member rear end 50 Rotational driving force transmission belt

Claims (4)

[Claims] 1. A case having a flat inner space, one side of which is substantially open, and a central shaft fixed to the case so as to extend substantially to the open side by the width of the inner space. A slitter knife mounting disk substantially embedded in the interior space and mounted via a cross roller bearing for rotation about the central shaft, the case of the slitter knife mounting disk The front side of the open side of can be fixed by attaching a slitter knife,
A slitter drive unit, wherein a periphery of a rear end portion of the slitter knife mounting disk is adapted to be engaged by a rotary driving force transmission member of a rotary driving device. 2. The rotation driving device includes a case having a flat inner space, and a cross roller bearing that is substantially embedded in the inner space of the case and can rotate with respect to the case. The slitter drive unit according to claim 1, further comprising an attached rotating member. 3. The periphery of the rear end portion of the slitter knife mounting disk and the rotary member of the rotary drive device are
The slitter drive unit according to claim 2, wherein the slitter drive unit is connected by a rotary driving force transmission belt. 4. The periphery of the rear end portion of the slitter knife mounting disk and the rotary member of the rotary drive device are
The slitter drive unit according to claim 2, wherein the slitter drive unit is connected by a rotary drive force transmission gear.