JPS6029439Y2 - Slitter drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving device for a slitter in a sheet cutter, winder, etc. that longitudinally slits a wide web of paper or processed paper.

In general, in the paper industry, for the finishing section of paper and paper processing, the upper blade is dish-shaped and the lower blade is bowl-shaped for slitting wide webs.

Recently, there has been a trend to make the lower blade into a dish shape like the upper blade for slitter, but unlike the conventional lower blade in the bowl shape, when the blade is corrected and polished, the blade shape changes, and the upper and lower blades are different from each other. The cutting point is not constant and the blade mounting holder is moved up and down depending on the blade diameter to match the cutting point.

At this time, the cutting line speed and the circumferential speed of the slitter blade change due to the change in the blade diameter, so there is a drawback that the rotation speed must be controlled in accordance with the blade diameter.

Therefore, the purpose of the present invention is to improve the above-mentioned defects, and in view of this, adjust the height of the cutting point of the lower blade slitter using a vertical moving device, and furthermore, change the blade diameter by adjusting the cutting point of the lower blade slitter through a variable pulley, a belt, and a fixed pulley. The objective is to provide constant control of peripheral speed.

Other objects and features of the present invention will become apparent from the drawings and the following description.

Therefore, regarding the drawings showing preferred embodiments of the present invention, FIGS. 1, 2, and 3 are views of conventional slitter apparatuses with upper blade dish type and lower blade type, and FIGS. 4 and 5 are FIGS. 6 and 7 are diagrams of a conventional upper and lower pan type slitter apparatus of the present invention, which is capable of vertically moving and variable drive adjustment.

Hereinafter, referring to embodiments of the present invention, the first embodiment will be described.
2 and 3 show relational diagrams that have been commonly used in the past.

In this figure, a web W is slit at a cutting point 3 between a lead-in roll 7 and a draw roll 8 by a slitter lower blade 1 and an upper blade 2.

When the slitter lower blade 1 wears out, only the horizontal direction is reground as a correction process, but since the bowl-shaped lower blade is used, the cutting point is constant and there is no vertical fluctuation.

The slitter lower blade 1 is engaged with a slitter drive shaft 4 and driven by drive gears 5A and 5B.

However, in recent years, the lower blade has been changed from bowl-shaped to dish-shaped in order to improve web slitting products.

Here, an embodiment of the first slitter shown in FIGS. 4 and 5 having both upper and lower plate types is shown.

In contrast to the bowl-shaped lower blade of the conventional slitter mentioned above, the lower blade is shaped like a dish to improve the cutting edge of the longitudinal section of the web and increase the cutting amount of the cut sheet. Unlike the bowl type, the dish type lower blade is worn and when the blade is corrected and polished, the diameter of the blade will change and the cutting point will be out of alignment.Therefore, the holder must be moved up and down according to the change in the blade diameter to adjust the position of the cutting point. In addition to this, the web cutting line speed and slitter blade peripheral speed differ due to changes in the blade diameter. To correct this, a variable speed motor is used to adjust the speed according to the blade diameter. It is necessary to control the rotation speed.

The variable speed motor 13, which is the drive source, controls the motor rotation speed in order to match the peripheral speed of the blade to the cutting line speed by changing the blade diameter, and the lower blade slitter 11 is driven by the speed change motor 13 via drive gears 14A and 14B. be.

To prevent wear and tear on the lower blade slitter 11, the lower blade slitter 11, variable speed motor 13, and The structure allows the drive gears 14A, 14B, casing 15, etc. to move up and down simultaneously.

FIGS. 6 and 7 show an upper and lower plate type slitter device of the present invention, which has been improved so that the device can be moved up and down and can be easily adjusted with variable drive.

The gear 25 is rotated by driving the line shaft 26 from the drive source.
A fixed pulley 24 that meshes with gears A and 25B and is coaxial with the gear 25B, and a belt 23 from this fixed pulley 24.
The slitter lower blade dish type slitter 21 is driven via the variable pulley 22 whose speed is changed.

Then, due to wear and tear on the slitter lower blade 21, the cutting point 32 can be aligned by changing the blade diameter by corrective polishing of the blade. When the slitter casing 27 is slid up and down by the moving device 28, it is aligned more accurately.

Further, the position of the line shaft 26 is fixed and installed.

The reason for this, although not shown in the drawing, is to use the same driving source when a plurality of slitter devices are installed.

Furthermore, to explain in detail how to adjust the cutting line speed by changing the blade diameter, the fixed pulley 24, the automatically variable pulley 22, and the vertical position of the cutting point 32 due to the blade diameter change. Even if the number of revolutions is constant (24), the structure is such that it can be kept constant even if the blade diameter changes.

Furthermore, the mounting structure of the slitter lower blade 21 and variable pulley 22 is as follows.
The slitter blade shaft is located concentrically and is moved up and down as the blade diameter changes, and is installed to match the cutting point, that is, the position of the right foot.

At this time, when the blade diameter becomes smaller, the distance between the centers of the variable pulley 22 and the fixed pulley 24 becomes longer, and when the blade shape becomes larger, the center distance becomes shorter. Since the length of the belt between the pulleys 22 and 24 is constant, when the distance between the pulleys 22 and 24 becomes longer, the variable pulley 22 automatically reduces the pulley diameter, and conversely, when the distance between the pulleys 22 and 24 is shortened, the pulley diameter increases. It will have to be done.

From the above, the slitter lower blade 21 and variable pulley 22
According to this relationship, it can be said that as the diameter of the lower slitter blade becomes smaller, the diameter of the variable pulley 22 becomes larger, and conversely, as the diameter of the lower slitter blade becomes larger, the diameter of the variable pulley 22 becomes smaller.

Furthermore, since the diameter of the fixed pulley 24 on the driving side is constant, even if the rotation of the fixed pulley 24 is constant and the diameter of the lower slitter blade 21 changes due to a change in the blade diameter, the lower slitter blade 21 remains at the cutting point. 32, the amount of movement of the variable pulley 22 due to changes in the blade, the amount of movement of the variable pulley 22 due to changes in the blade diameter, the amount of movement between the variable pulley 22 and the fixed pulley 24 due to the amount of movement, and the amount of movement of the variable pulley 2 due to the amount of movement between the pulleys.
By adjusting the peripheral speed of the blade by changing the blade diameter to match the blade cutting point from the diameter change in step 2, it is possible to individually control multiple units of the slitter device, and also to control the rotation control motor of each slitter device. Even in an installation with a plurality of slitter devices without using a slitter, it can be easily carried out using a -line shaft (26 in this case).

As is clear from the above description, by using the slitter device of the present invention, the cutting edge of the blade becomes sharper, the slit surface of the web becomes cleaner, the amount of cutting is increased, and the change in blade diameter can be adjusted using the slitter casing. The vertical movement allows the cutting point to be aligned accurately and quickly, and the blade circumferential speed can be easily adjusted by changing the blade diameter.

[Brief explanation of the drawing]

Figure 1 is a side installation layout diagram of a conventional upper and lower blade slitter device.
2 is a simplified front view of a combination of multiple slitter devices shown in FIG. FIG. 6 is a detailed front sectional view of the present invention, and FIG. 7 is a detailed side view of FIG. 6. In the internal factors, 21 is the slitter lower blade, 22 is the variable pulley, 23 is the belt, 24 is the fixed pulley +, 25A, 25
B...Gear, 26 is a line shaft, 27 is a slitter casing, 28 is a vertical moving device, 31 is a slitter upper blade, 32 is a cutting point, and W is a web.

Claims (1)

[Scope of utility model registration request] In a driving device for upper and lower slitter blades that slit a wide web, the slitter upper blade 31 is a pressing member, and the slitter lower blade 21 is machined into the bundle and its tip, in alignment with the cutting point 33 of the slitter upper 31 and lower 21 blades. A vertical movement device 28 for vertically moving the slitter casing 27 with left and right screws increases or decreases the rotational speed by changing the blade diameter of the lower slitter blade 21 from the rotational drive of the line shaft 26 via the fixed pulley 24 and belt 23. The upper slitter blade 3 is controlled by feeding the variable speed variable pulley 22 to control the peripheral speed of the blade.
1. A slitter driving device characterized by rotating under pressure.