JPH0212072Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rotary shear for a corrugating machine that cuts a continuous sheet such as a corrugated sheet at a predetermined position.

[Conventional technology]

In a series of processing steps in a corrugating machine, the rotary shear is generally placed after the sheet lamination process for single facer and double facer, etc., and is used to process each order (process a predetermined quantity of products according to customer orders). ) is provided to cut the entire width or part of a corrugated sheet that flows continuously, or to cut and remove a defective bonded portion near the beginning of a corrugated sheet when a corrugating machine is started.

An example of a rotary shear used for cutting such corrugated sheets is the Utility Model No. 61-35431.
The one in the publication No. 1 is already publicly known.

The rotary shear according to this publication consists of two cylinders that are horizontally supported by a frame and are arranged one above the other, the upper cylinder serving as a knife cylinder and the lower cylinder serving as an anvil cylinder. The knife cylinder has a knife having a width approximately equal to the cylinder width in the radial direction on its circumferential surface,
The outer end of the support shaft is connected to a line shaft from another drive system via a belt drive device or the like. The outer periphery of the anvil cylinder is covered with a lining made of a soft elastic material such as urethane rubber, and a portion of the lining is cut into a substantially trapezoidal shape on the outer periphery. One end of the support shaft of the anvil cylinder is provided with a gear that meshes with a gear provided on the support shaft of the knife cylinder via a clutch, and the other end is connected to a separately provided drive motor via a belt drive device. There is.

When the above-mentioned rotary shear cuts continuously fed corrugated sheets, the lining of the anvil cylinder is cut into a shape (trapezoid) that changes in the width direction of the cylinder, so the knife of the knife cylinder cuts into the anvil cylinder. The cutting width can be varied in various ways by appropriately controlling the phase angle of the knife with respect to the anvil cylinder when in contact, depending on the cutting width to be cut.

[Problem that the invention attempts to solve]

However, in the above-mentioned known rotary shear, the desired width at the time of partial cutting depends on which width part of the variable-width part the knife of the knife cylinder abuts on by cutting the lining of the anvil cylinder. Regardless of its accuracy, it is necessary to control the mutual phase angle between the knife cylinder and anvil cylinder in order to determine the desired cutting width, which has the disadvantage that this control circuit becomes unnecessarily complex.

All you need is a knife that is wide enough to partially cut both ends of the smallest cardboard sheet.
It is not necessary to partially cut the lining to make the width of the cut variable. Further, in the case of the above-mentioned known rotary shear, the lining is damaged because the same part of the lining is repeatedly hit by the knife, and the rotary shear cannot withstand long-term use, which is disadvantageous in terms of maintenance.

This idea was made in view of the current state of rotary shears as described above, and its purpose was to provide a simple fixed knife to the knife cylinder, which would be easy to maintain and durable for long-term use, and which could be used as needed. To provide a rotary shear that can reliably cut the entire width and parts of corrugated cardboard sheets.

[Means for solving problems]

As a means to solve the above-mentioned problems, this invention includes a knife cylinder having a knife on its circumferential surface, which is provided opposite to the traveling path of the corrugated cardboard sheets that are continuously running, and an anvil cylinder having a receiver for the knife cylinder. , a moving device that moves one of the cylinders up and down so that it can be freely displaced to a predetermined height, and a rotational drive device connected to the end of the knife cylinder, the knife of the knife cylinder covers the entire width of the circumferential surface. It consists of a full-blade knife and a partial knife that has approximately the same overall width as this knife but has a required width cut out in the middle, and the receiver of the anvil cylinder is made of an elastic body lined on the entire circumference, A rotary shear that rotates the knife cylinder with a rotary drive device while one cylinder is separated from the other cylinder, selectively aligns the full-blade knife and the partial knife with respect to the anvil cylinder, and performs cutting. The structure was adopted.

[Effect]

When the corrugated cardboard sheets are laminated with double facers and then enter the rotary shear according to this invention, the relationship between each order and the dimensioning of the processed product between orders and the subsequent processing steps, especially the cutting with the upper and lower two cutters of the rotary cutter. Depending on whether the machining is finishing using only the upper or lower cutters, either a full-width knife or a partial knife is selected for cutting in the knife cylinder.

Apart from the full-width knife, a partial knife is provided, so that the knife selection takes place, for example, a full-width knife and then a full-width knife again;
Before cutting with the second full-width knife, it is necessary to pass the partial knife through the cutting position without making a cutting operation, so either the knife cylinder is lifted to a predetermined height by the moving device or the anvil cylinder is moved. is lowered, while the parting knife is passed through to prepare for the next cutting operation.

〔Example〕

Embodiments of this invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an overall schematic diagram of the rotary shear of this embodiment. A knife cylinder 1 is vertically opposed to the running path of the corrugated paperboard sheet W that runs continuously.
and anvil cylinder 2 are pivotally supported by a support frame 5 via support parts 3 and 4 constituted by bearings. As the detailed structure is shown in Figure 3,
The knife cylinder 1 has a knife 1a extending over the entire width on the circumferential surface.
A full-blade knife and a partial knife 1b, which has approximately the same overall width as the knife 1a and has a required width cut out in the middle thereof, are provided in the vicinity of the opposite side of the knife.
The entire outer peripheral surface of the anvil cylinder 2 is covered with a lining 2' made of a soft elastic material such as urethane rubber, and as shown in FIG.
The corrugated cardboard sheet W is cut by cutting the cutting edges a and 1b into the lining 2'.

Of the support parts 3 and 4, the support part 4 is fixed to the support frame 5, and the bearing of the support part 3 is attached to the support frame 5 via an eccentric gear 6a of a moving device 6, which will be described later. .

The moving device 6 is an eccentric gear 6a having teeth on the outer periphery.
, a pinion 6b that meshes with this gear, and a motor 6c connected to the pinion. moreover,
An Oldham shaft coupling 7 is connected to one shaft end of the knife cylinder 1, and its input shaft end connects a pulley 9 and another pulley 10 provided on a shaft parallel to this shaft to a belt 11 and a motor connected to this device. The motor 12 is connected to a rotary drive device consisting of a motor 12.
is installed on the mounting base 13. The driving force by the motor 12 of the rotary drive device is transmitted to the knife cylinder 1 via the belt drive device and the Oldham shaft coupling 7, but as will be described in detail later, it is possible to cut either the full-width knife 1a or the partial knife 1b. In order to pass the knife without cutting at the position, the pinion 6b is rotated by the motor 6c to raise the level of the axis 1' of the knife cylinder 1 from the axis position indicated by the dashed dot line to the position indicated by the solid line, as shown in Fig. 4. Can be done.

FIG. 5 is a partial sectional view showing a moving device 6' as another modified embodiment. This moving device 6' consists of a hydraulic cylinder 6'c and a flange part 6'a, and the support part 3 is provided on the flange part 6'a. Therefore, the support portion 3 can be moved by moving the piston of the hydraulic cylinder 6'c up and down. The structure of the support part 4 is the same as in the previous embodiment.
Corresponding to the configuration of the moving device 6', there is a reduction gear 7' on one shaft end of the knife cylinder 1, and another gear that is attached to a shaft supported by the frame 5 parallel to the knife cylinder and meshes with the gear 7'. 8, which is connected via its shaft to a rotary drive device consisting of a belt drive device and a motor 12 similar to those described above. The moving device 6' of this embodiment is provided so that when the knife cylinder 1 is raised to a predetermined height (approximately 10 mm), it is raised at an extremely slight angle so that the meshing of the gears 7 and 8 is not changed. It is better to leave it there.

In any of the above embodiments, the moving device 6,
6' is provided on the side of the knife cylinder 1 so that the knife cylinder 1 can be moved up and down, but on the contrary, moving devices 6 and 6' are provided on the side of the anvil cylinder 2,
It goes without saying that the anvil cylinder 2 may be configured to move up and down. However, in that case, as shown in FIG.
It is advantageous to provide a plurality of these so that the corrugated sheet W can be pushed down when passing through the knife 1a or 1b without cutting the corrugated sheet W.

Separately from the drive system of the knife cylinder 1, the anvil cylinder 2 is connected to a drive line 17 for other equipment of the corrugated machine equipped with this rotary shear.
Power is transmitted from there through a belt drive device (pulleys 14, 15, belt 16).

The operation of the above-mentioned embodiment configured as described above can be explained as follows.
This will be explained with reference to the figures and FIG. The symbol A in FIGS. 2 and 6 corresponds to the full-width knife 1a in FIGS. 1 and 3, and the symbol B likewise corresponds to the partial knife 1b.

As mentioned above, in the manufacturing process of corrugated cardboard sheets, the corrugated cardboard sheets that are first pasted together using double facers are often not in a perfect finished state due to misalignment or wrinkles at the leading edge, and it is difficult to cut them into products. This leading part must be cut to an appropriate length until it becomes . At this time A
The knife is waiting at the upper left position in Figure 2, and cuts the entire width of the corrugated cardboard sheet in response to a cutting command signal. When the leading edge of a new corrugated sheet is passed through a downstream slitter/scorer and rotary cutter, the corrugated sheet is continuously fed and processed into the desired product. When one order is completed, each processing device is reset to a predetermined size for the next order. In the next order above, for example, in the previous order, cutting was performed with only the upper cutter using a rotary cutter, but the next order will also be divided into only the upper cutter, only the lower cutter, or the upper and lower cutters, and cut with both. There are various cases in which the corrugated board sheet W needs to be cut across its entire width with a rotary shear, or only partially cut.

Therefore, as shown in Fig. 6, we assume a cycle of full-width cutting first with knife A, then full-width cutting again with knife A, and partial cutting with knife B for the third order. The movements of knives A and B in the figure will be explained.

First, for the first order, the A knife is waiting at the upper left of FIG. 2, and in response to a cutting command signal, the knife cylinder 1 starts rotating, accelerates to line speed, and then performs full width cutting. After cutting, the knife cylinder 1 decelerates, and the A knife comes to the upper right and stops. At this time, the B knife will be at the bottom left. In order to perform full-width cutting again in the second order, it is necessary to rotate the knife cylinder 1 at low speed using the rotary drive device and position the A knife, which is stopped at the upper right, to the standby position at the upper left. The B knife located at the lower left must be passed through the cutting position without any cutting action. At this time, the knife cylinder 1 is lifted by the moving device 6, and during this time the B knife passes through the cutting position and comes to the lower right in the figure, returning to the initial standby state. From this state, the full width cutting operation of the knife cylinder 1 is performed as in the first order. Since the third order involves partial cutting using the B knife, similarly, while the knife cylinder 1 is being lifted, the knife cylinder 1 is rotated at a low speed by the rotary drive device.
The B knife, which is stopped at the lower left, and the A knife, which is stopped at the upper right, are sequentially passed through the cutting position, and the B knife is positioned at the upper left for cutting and is placed on standby.

In any of the above operations, the anvil cylinder 2 may simply contact the knife of the knife cylinder at any phase angle.

〔effect〕

Since this invention is constructed as described above, the following effects can be obtained.

The full-blade knife and the partial knife can be selectively aligned to effect full-width or partial cuts of the corrugated sheet.

During cutting, the full width or partial width of the corrugated sheet can be cut no matter which part of the elastic body that is lined on the entire circumference of the anvil cylinder is contacted by the full or partial knife. Because you don't have to concentrate on one place,
Breakage of the elastic body can be prevented as much as possible, and it can withstand long-term use.

During cutting, there is no need to control the rotational positioning of which portion of the anvil cylinder in the circumferential direction the full blade or partial knife should abut, so the configuration is extremely simple and phase control is easy.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic view of the rotary shear according to the embodiment of this invention, Fig. 2 is a partial sectional view thereof, Fig. 3 is a partially enlarged view of the knife, Fig. 4 is a partially enlarged view of the moving device 6, and Fig. 5 is a partially enlarged view of the knife. FIG. 6, a partially enlarged view of the moving device 6', is a speed diagram illustrating the operation. 1...Knife cylinder, 1a...Full width knife, 1b...Partial knife, 2...Anvil cylinder, 3, 4...Support part, 6...Movement device.

Claims (1)

[Scope of utility model registration request] A knife cylinder with a knife on the circumferential surface and an anvil cylinder with a receiver for the knife cylinder are provided opposite to the running path of the corrugated paperboard sheet that runs continuously, and one of the cylinders is moved up and down to a predetermined position. A moving device capable of freely displacing the height, and a rotary drive device connected to an end of a knife cylinder, wherein the knife of the knife cylinder is a full-blade knife extending over the entire width of the circumferential surface, and the full width is approximately the same as that of the knife. and a partial knife with a required width cut out in the middle, and the receiver of the anvil cylinder is made of an elastic body lined on the entire circumference, and when one of the cylinders is separated from the other cylinder by the moving device. A rotary shear characterized in that the knife cylinder is rotated by a rotary drive device to selectively align the full-blade knife and the partial knife with respect to the anvil cylinder to perform cutting.