JPH0569390A - Rotary drum type cutting device - Google Patents

Abstract

PURPOSE:To provide a rotary drum type cutting device, which can manufacture long stretching objects of two different sorts simultaneously on the same web running path. CONSTITUTION:Two sets of knife cylinders 7a, 7b are borne by a bracket 5, and one-side ends of knives 6a, 6b formed at the cylinders are arranged straight in the sheet running direction. Product sheets of different widths and lengths can parallelly manufactured at one time by adjusting and setting the knife cylinder positions in the direction across the width in compliance with the sheet slitting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drum type cutting device for thin plates such as various paperboards and plastics. More specifically, the corrugated machine continuously feeds corrugated cardboard sheets of a predetermined length. The rotary drum drum of the cut-off section that cuts each time is characterized.

[0002]

2. Description of the Related Art A conventional rotary drum type cutting device will be described with reference to FIGS. 6 to 9. FIG. 6 is an explanatory view showing the schematic structure and function of a conventional cutoff installed in a corrugated machine. The rotary drum machine installed at the cutoff of the corrugating machine is a device that cuts the corrugated board web 1 continuously fed from the previous step at a substantially right angle to the traveling direction. It is as illustrated. In other words, the conventional rotary drum is a pair of hollow knife cylinders 1 that are vertically rotatable.
7 and 18, fixed on the circumferential surface, linear or spiral long knives 19 and 20, respectively, substantially parallel to the axial direction, and by rotating the upper and lower knife cylinders 17 and 18 to face each other, The knives 19 and 20 are engaged once per one rotation, and the upper and lower knife cylinders 17,
The corrugated board web 1 fed between 18 is sheared. The knife cylinders 17 and 18 to which the knives 19 and 20 are fixed are axially attached to their respective shafts 21 and 22 by bearings interposed at both ends of the cylinders. It is supported by frames 23a and 23b which are erected at the ends. Gear wheels 24 and 25 are attached to both ends of the knife cylinders 17 and 18 and mesh with each other. Further, on the gear 25 side, a gear 27 fixed to the shaft tip of a shaft connected to the shaft of the prime mover 26 via a coupling is engaged. Further, since the gear 24 and the gear 25 have the same number of teeth, the knife cylinders 17 and 18 rotate in opposition to each other with the same phase angle by the driving of the prime mover 26. Knife 1 in conventional rotary drum machine
Reference numerals 9 and 20 are attached over substantially the entire length of the knife cylinders 17 and 18, and when two types of product sheets 2a and 2b of different lengths are manufactured from one corrugated board web 1, the rotary type of the above structure is used. It is necessary to provide two sets of drumshas located vertically, and they are usually arranged as shown in FIG.

Next, setting and function of the cutting device (control of cutting) will be described. FIG. 6 shows two kinds of product sheets 2a and 2b having different lengths from one corrugated board web 1.
The case of two picks for manufacturing is illustrated. As shown in the figure, the corrugated board web 1 running continuously has a ruled line roll 2 in a slitter scorer which is a process immediately before cutoff.
After the ruled line K processing by 8, the slitter knife 29
It is slit by and divided into two sheets. The divided web 1b on one side is horizontally fed through a lower traveling path as shown in FIG. 7, and is cut to a length of L ₂ in FIG. 6 by a lower rotary drum shear. On the other hand, the traveling path of the web 1a on the other side is changed in the upward direction by the sorting device 30, and the web 1a is cut to a length of L ₁ in FIG. 6 by the rotary drum shear located above. In the figure, 14a and 14b are rollers having a predetermined diameter for measuring the traveling speeds of the separated webs, and the corrugated board web 1 is sandwiched between the receiving roller 31 and the counter roller 31 which are opposed to each other. The product lengths L ₁ and L ₂ are detected by detecting the numbers with encoders 15a and 15b and feeding them back.
The drive / stop of the prime mover 26 is controlled so that the knives 19 and 20 operate in accordance with the above. The product sheets 2a and 2b cut into the predetermined lengths L ₁ and L ₂ as described above are transferred to the next step via the conveyors 32a and 32b, and are stacked as a sheet bundle in the auto stacker which is the final step. It is formed and discharged to the outside.

[0004]

By the way, today, for the purpose of improving productivity, it is becoming more and more common to manufacture product sheets 2a and 2b of different lengths at the same time in the same corrugating machine. However, since the conventional rotary drum shear is configured and functions as described above, various problems such as the following increase in manufacturing cost and installation area (volume) due to the structure of the apparatus are left. .. That is, as described in the above-mentioned section of the prior art, the rotary drum shear which has been equipped with the cutoff so far is equipped with a long knife configured to cut the maximum width of the corrugated cardboard sheet that can be run. Thus, for example, in the case of picking two sheets having different lengths, not only a sorting device for changing the traveling path of the sheets is required, but also two sets of cutting devices arranged above and below are required. Further, in connection with this, it is necessary to install two sets of sheet guide rolls, belt conveyors, and other sheet conveying devices, which causes a significant increase in the manufacturing cost of the device. Furthermore, when changing the traveling route of the seat,
There was a problem such as the sheet breaking. Therefore, it is impossible to set an extreme bending angle, and it is necessary to widen the gap between the pre-process slitter and the cutoff part, which causes problems such as an increase in the installation length (floor area) and volume of the device. there were.
The present invention proposes to address these problems.

[0005]

To this end, the present invention comprises an upper cylinder having a long cutting knife on its peripheral surface, and a lower anvil cylinder facing the same cylinder and rotating synchronously in opposite directions. In a rotary drum type cutting device for cutting a sheet having a predetermined length through a sheet running continuously between the cylinders, the same cylinder is configured as two upper knife cylinders, and one end of each knife of these knife cylinders is positioned on a straight line. In this way, two upper knife cylinders are axially supported side by side, and further, each cylinder is configured to be independently driven, and this is a means for solving the problem. ..

[0006]

[Function] When two kinds of products having different lengths are to be simultaneously obtained from the continuously supplied long sheet-like material (two picking), the sheet-like material should be separated (slitting groove) at the position. If the rotary drum type cutting device is moved and adjusted in the width direction and two knife cylinders arranged in parallel according to each product length are operated, two types of products with different lengths can be produced in the same web traveling path. Manufactured at the same time. As a result, it is possible to expect effects such as simplification of various facilities and reduction of installation space accompanying the change of the traveling route of the sheet (corrugated board web).

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 are basic structural explanatory views of a rotary drum type cutting device showing an embodiment of the present invention installed in a corrugated machine. 4 and 5 are functional explanatory diagrams of the cutting device.
In this embodiment, the function as a cutting device for cutting the corrugated board web 1 continuously fed from the previous step at a right angle to the traveling direction is the same as that described in the section of the prior art. Therefore, detailed description thereof will be omitted. The rotary drum type cutting device according to the present invention, when manufacturing two types of product sheets 2a and 2b having different lengths from the traveling corrugated cardboard web 1, the traveling paths of the sheets are vertically divided into two stages. It is characterized in that it can be carried out without branching to 1. The structure will be described in detail below.

As shown in FIGS. 1 and 2, the rotary drum type cutting device according to the embodiment of the present invention is constructed such that the frames 3a and 3b erected on both ends of the corrugated machine are connected to each other via the beam 4 which is constructed by the upper ends of the frames 3a and 3b. Brackets 5a, 5 connected to each other and configured to reciprocate in the device width direction in the beam 4
b and 5c are suspended. Bracket 5a, 5b, 5c
Are connected to each other via connecting members (not shown), and all of them can be moved integrally. Further, as shown in FIGS. 1 and 2, the bracket 5 has the above-mentioned bracket 5
Two sets of knife cylinders 7a and 7b, which are set to be linear, are pivotally supported so that one side ends of the knives 6a and 6b coincide with the slitting position by commonly using a, 5b and 5c. The slitting positions of the knife cylinders 7a and 7b can be adjusted by moving the brackets 5a, 5b and 5c. The knife cylinder 7a is driven by the motors 8a and 8b directly connected to the shaft ends, and the knife cylinder 7b is driven by the motor 9 directly connected to the shaft ends. Each of the knife cylinders 7a and 7b can operate independently. It is like this. On the other hand, each knife cylinder 7a,
Anvil cylinders 10a and 10b, which are located just below 7b and are arranged in parallel to engage with the knives 6a and 6b, are attached. The anvil cylinder 10a is a frame 3 on both sides.
A beam 11 installed between a and 3b is rotatably supported by bearings 12a and 12b. Further, as shown in FIG. 3, the anvil cylinder 10b also shares the beam 11 similarly to the above, and is rotatably supported by bearings 13a and 13b. A general anvil cylinder 10 is formed by winding an elastic body having a predetermined hardness, and the corrugated board web 1 runs in the center of the knife cylinder 7 and the anvil cylinder 10.
The knife 6 and the elastic body are sandwiched and rotated so as to be cut.

Based on the above structure, the setting and cutting control for the traveling corrugated board web 1 will be described with reference to FIGS. 4 and 5. FIG. 4 shows two types of corrugated board webs 1 having different lengths. 2 illustrates a case of manufacturing two product sheets 2a and 2b. First, with the position of the knife cylinders 7a and 7b in the sheet width direction adjusted to the slitting position described later, the corrugated board web 1 that continuously runs as shown in the figure has the ruled line K processed in the slitter scorer in the immediately preceding step. After it is slitted again, it is divided into two webs. The divided one-side web 1a has a measuring roller 14a and an encoder 15 as known in the art.
The traveling speed is detected by "a", and the knife cylinder 7a is actuated by the motors 8a, 8b controlled by the feedback of the signal to cut the length to L ₁ in FIG. On the other hand, the web 1b on the other side is the measuring rollers 1 arranged side by side.
4b, the traveling speed is detected by the encoder 15b side, and is cut to L ₂ in FIG. 4 by the operation of the knife cylinder 7b on the other side via the motor 9 controlled by the feedback of the signal. The product sheets 2a and 2b cut as described above are respectively provided to the corresponding conveyors 1
It is carried out to the downstream process via 6a and 16b.

The rotary drum type cutting device according to the present invention is constructed and functions as described above, and the position of the knife cylinders 7a, 7b in the sheet width direction can be adjusted and set corresponding to the position of the slitting groove S on the web. For example, the product sheets 2a and 2b having various widths and lengths can be simultaneously manufactured in parallel. In addition, the knife cylinders 7a and 7b are attached to the short side (7
b side) to move the knife 6 of the long knife cylinder 7a.
If the a side is made to correspond to a corrugated board web, it is possible to cut over the entire width of the corrugated board web. The exemplified anvil cylinders 10a and 10b are installed in a fixed position and can be used in a wide range in the axial direction by moving the slitting groove S position on the corrugated cardboard web due to an order change. Therefore, the durability is improved. However, there is also a method of movably installing the anvil cylinders 10a and 10b in the axial direction, and a method of forcibly rotating the anvil cylinders 10a and 10b in conjunction with the knife cylinders 7a and 7b. Further, the long side knife cylinder 7a in the figure is driven by two motors 8a and 8b connected to both ends of the shaft to reduce the twist of the cylinder 7a. A motor 8 located on one side of the shaft similar to the knife cylinder 7b
It is also possible to drive only with a or 8b. Further, the two upper knife cylinders having the above-mentioned configuration may be fixed to the movable member so that the movable member can be moved and set in the width direction so as to be adapted to the slitting groove position of the traveling sheet. The above configuration is not limited to the above embodiment, and various modifications such as the arrangement of the knife cylinder can be made without departing from the scope of the present invention.

[0011]

As described in detail above, according to the present invention, two knife cylinders are moved and adjusted to the slitting groove positions of the traveling web, and each knife cylinder is adjusted in accordance with each sheet traveling speed and product length. If the two are independently operated, two types of product sheets can be simultaneously manufactured in the same sheet traveling path without sorting the corrugated board web into upper and lower parts. As a result, various equipment associated with the change of the traveling route of the corrugated board web can be simplified and the manufacturing cost of the device can be reduced. In addition, it is not necessary to take measures against bending when the corrugated board web is changed in traveling route, and the distance between the slitter and the cutoff can be shortened, so that the installation area and volume can be reduced. In addition to the cut-off, the corrugated machine as a whole can be made smaller and lighter in relation to the front and rear processes, making it easier to carry it into and install it at the customer's factory. It is possible to obtain excellent effects such as reduction of

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a rotary drum type cutting device according to the present invention.

FIG. 2 is a view on arrow AA in FIG.

FIG. 3 is a view taken along arrow BB in FIG.

FIG. 4 is a plan view illustrating the configuration and function of a rotary drum type cutting device according to an embodiment of the present invention.

FIG. 5 is a side view of FIG.

FIG. 6 is a plan view of a conventional rotary drum type cutting device.

FIG. 7 is a side view of FIG.

8 is a view taken in the direction of arrows C to C in FIG.

9 is a front sectional view of a rotary drum portion in FIG.

[Explanation of symbols]

 1 Corrugated Cardboard Web 2 Product Sheet 3 Frame 4 Beam 5 Bracket 6 Knife 7 Knife Cylinder 8 Motor 9 Motor 10 Anvil Cylinder 11 Beam 12 Bearing 13 Bearing 14 Measuring Roller 15 Encoder 16 Conveyor Conveyor 17 Hollow Knife Cylinder 18 Hollow Knife Cylinder 19 Knife 20 Knife 21 shafts 22 shafts 23 frames 24 gears 25 gears 26 prime movers 27 gears 28 ruled line rolls 29 slitter knives 30 sorting devices 31 receiving rollers 32 transport conveyors

Claims (1)

[Claims] 1. An upper cylinder having a long cutting knife on its peripheral surface, and a lower anvil cylinder facing the same cylinder and rotating synchronously in opposite directions. In a rotary drum type cutting device for cutting to the length of the same, the cylinder is constructed as two upper knife cylinders, and the two upper knife cylinders are arranged so that one end of each knife of these knife cylinders is located on a straight line. A rotary drum type cutting device, which is axially supported and in which each cylinder is independently driven.