JP2831179B2 - Rotary drum type cutting device - Google Patents

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 paper such as paperboard and plastic, and more particularly, to a corrugated sheet continuously fed by a corrugating machine to a predetermined length. It is characterized by a rotary drum shear of a cut-off section that cuts each time.

[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 a schematic structure and functions of a conventional cutoff provided in a corrugating machine. The rotary drumshaft provided at the cut-off of the corrugating machine is a device for cutting the corrugated cardboard web 1 continuously fed from the previous process substantially at right angles to the traveling direction, and the schematic structure is shown in FIG. It is as illustrated. That is, the conventional rotary drumshaft is a pair of hollow knife cylinders 1 that are rotatably mounted up and down.
Long knives 19 and 20 are fixed on the circumferential surface of the knives in a straight line or a spiral shape substantially in parallel in the axial direction, and the upper and lower knife cylinders 17 and 18 are rotated opposite to each other. And the upper and lower knife cylinders 17 and 20 are engaged once per revolution.
The cardboard web 1 fed between 18 is sheared. Knife cylinders 17 and 18 to which knives 19 and 20 are fixed are mounted on respective shafts 21 and 22 by bearings interposed at both ends of the cylinders. It is supported by frames 23a and 23b standing upright at the ends. Gears 24 and 25 are attached to both ends of the knife cylinders 17 and 18 so as to mesh with each other. Further, a gear 27 fixed to the shaft tip of a shaft connected to the shaft of the prime mover 26 via a coupling is meshed with the gear 25 side. Since the gears 24 and 25 have the same number of teeth, the knife cylinders 17 and 18 rotate at the same phase angle by the driving of the prime mover 26. Knife 1 in conventional rotary drumshaft
Numerals 9 and 20 are attached over substantially the entire length of knife cylinders 17 and 18, and when two types of product sheets 2a and 2b having different lengths are manufactured from one corrugated cardboard web 1, the rotary type having the above structure is used. It is necessary to provide two sets of the drumshafts vertically, and they are usually arranged as shown in FIG.

Next, the setting and function (cutting control) of the cutting device will be described. FIG. 6 shows two types of product sheets 2a and 2b having different lengths from one corrugated cardboard web 1.
Is illustrated in the case of a two-claw manufacturing. As shown in the figure, the corrugated cardboard web 1 that runs continuously has a ruled line roll 2 in a slitter scorer which is a process immediately before cutoff.
After the processing of the ruled line K is performed by using the slitter knife 29,
And split into two sheets. Divided one side of the web 1b is fed horizontally through the traveling path of the lower, as shown in FIG. 7, is cut to a length in FIG. 6 L ₂ by the lower rotary Doramusha. While the other side of the web 1a is changed travel path upwards through sorting device 30 is cut by rotary Doramusha located above the length in FIG. 6 L _1. In the drawing, reference numerals 14a and 14b denote rollers having a predetermined diameter for measuring the running speed of each separated web. The corrugated cardboard web 1 is sandwiched between a pair of opposed receiving rollers 31, and the rolling per unit time is performed. The product lengths L ₁ , L ₂ are detected by the encoders 15a, 15b, etc., and fed back.
, The driving and stopping of the motor 26 are controlled so that the knives 19 and 20 operate. The product sheets 2a and 2b cut into the predetermined lengths L ₁ and L ₂ as described above are transferred to the next process via the conveyors 32a and 32b, and are stacked as a sheet bundle in the auto stacker, which is the final process. Formed and discharged outside.

[0004]

By the way, today, for the purpose of improving productivity, it is increasingly common to simultaneously manufacture product sheets 2a and 2b having different lengths in the same corrugating machine. However, since the conventional rotary drumshaft is configured and functions as described above, various problems such as an increase in manufacturing cost and an increase in installation area (volume) due to the structure of the apparatus remain. . That is, as described in the section of the related art, the rotary drumshah that has been provided at the conventional cutoff has 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 two-cutters having different lengths, not only a sorting device for changing a sheet traveling route is required, but also two sets of cutting devices arranged vertically. In connection with this, it is necessary to install two sets of sheet conveying devices such as a sheet guide roll and a belt conveyor, which has caused a considerable increase in the manufacturing cost of the device. In addition, when changing the travel route of the seat,
There were problems such as the sheet breaking. Therefore, it is impossible to set an extreme bending angle, and it is necessary to increase the interval between the pre-process slitter and the cut-off part, and the installation length (floor area) and the volume of the apparatus are increased. there were.
The present invention proposes to address these problems.

[0005]

SUMMARY OF THE INVENTION Accordingly, 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 the opposite direction. In a rotary drum type cutting device that cuts to a predetermined length through a sheet-like material that continuously travels between the cylinders, the same cylinder moves back and forth in the traveling direction of the sheet.
Together are arranged Te, it is composed of two upper knife cylinder which is driven independently, and parallel straight line connecting the inner end of each knife of the upper knife cylinder against the travel direction of the sheet
With the upper knife cylinder in the same
It is configured to be movable in the width direction , and this is a means for solving the problem.

[0006]

When two kinds of products having different lengths are to be obtained simultaneously from a continuously supplied long sheet material (two sheets), the sheet material is adjusted to the separation (slitting groove) position. By moving and adjusting the rotating drum type cutting device in the width direction and operating two knife cylinders arranged in parallel according to each product length, two types of products having different lengths in the same web traveling path can be obtained. Manufactured at the same time. As a result, effects such as simplification of various facilities and reduction in installation space due to a change in the traveling route of the seat (corrugated cardboard web) can be expected.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 are explanatory views of the basic structure of a rotary drum type cutting device showing an embodiment of the present invention installed in a corrugating machine. 4 and 5 are explanatory diagrams of functions of the cutting device.
In the present embodiment, the function as a cutting device for cutting the corrugated cardboard web 1 continuously fed from the previous process at a right angle to the traveling direction is the same as that described in the section of the related art. Therefore, the detailed description is omitted. The rotary drum type cutting device according to the present invention, when producing two types of product sheets 2a and 2b having different lengths from the traveling corrugated cardboard web 1, moves the sheet traveling path up and down two steps as before. It is characterized in that it can be performed without branching, and its structure will be described in detail below.

As shown in FIGS. 1 and 2, a rotary drum type cutting apparatus according to an embodiment of the present invention mutually connects a beam 3 on which the upper ends of frames 3a and 3b erected at both ends of a corrugating machine are erected. Brackets 5a and 5 connected to each other and configured to be able to reciprocate in the beam width direction on the same beam 4.
b and 5c are suspended. Brackets 5a, 5b, 5c
Are connected to each other via a connector (not shown), so that all of them can move integrally. As shown in FIG. 1 and FIG.
Two sets of knife cylinders 7a, 7b which are set to be linearly arranged so that one end of each of the knives 6a, 6b coincide with the slitting position are shared by a, 5b, 5c and are axially supported. The slitting positions of the knife cylinders 7a, 7b can be adjusted by moving the brackets 5a, 5b, 5c. The knife cylinder 7a is driven via a motor 8a, 8b directly connected to the shaft end, and the knife cylinder 7b is driven via a motor 9 directly connected to the shaft end. The knife cylinders 7a and 7b can operate independently. It has become. On the other hand, each knife cylinder 7a,
Anvil cylinders 10a and 10b, which are located directly below 7b and are juxtaposed to engage with the knives 6a and 6b, are mounted. The anvil cylinder 10a is a frame 3 on both sides.
It is rotatably supported via a bearing 12a, 12b to a beam 11 erected between a, 3b. As shown in FIG. 3, the anvil cylinder 10b also shares the beam 11 as described above, and is rotatably supported by bearings 13a and 13b. The general anvil cylinder 10 is obtained by winding an elastic body having a predetermined hardness, and the corrugated cardboard web 1 runs in the center between the knife cylinder 7 and the anvil cylinder 10,
The knife 6 is cut by the pinching rotation of the elastic body.

The following describes the setting and cutting control for the traveling corrugated cardboard web 1 based on FIGS. 4 and 5 based on the above structure. FIG. 4 shows two types of corrugated cardboard webs 1 having different lengths. 2 is a case where two product sheets 2a and 2b are manufactured. First, with the knife cylinders 7a and 7b in the sheet width direction adjusted to the slitting position described later, the corrugated cardboard web 1 running continuously as shown in FIG. After slitting, the web is divided into two webs. The divided one side web 1a is connected to a measuring roller 14a and an encoder 15
travel speed by a is detected, the motor 8a, which is controlled by a feedback of the signal, is cut to a length in FIG. 4 L ₁ by the operation of the knife cylinder 7a through 8b. On the other hand, the web 1b on the other side is
4b, the traveling speed by the encoder 15b side is detected, via a motor 9 which is controlled by the feedback of the signal are cut in Figure 4 in L ₂ by the operation of the other side of the knife cylinder 7b. The product sheets 2a and 2b cut as described above are stored in the corresponding conveyors 1 respectively.
It will be 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 adjusts and sets the positions of the knife cylinders 7a and 7b in the sheet width direction corresponding to the positions of the slitting grooves S on the web. For example, product sheets 2a, 2b of various widths and lengths can be manufactured simultaneously in parallel. The knife cylinders 7a and 7b are connected to the short side (7
b side) to move the knife 6 of the long knife cylinder 7a.
If the a side corresponds to the corrugated cardboard web, cutting over the entire width of the corrugated cardboard web is also possible. The illustrated anvil cylinders 10a and 10b are fixedly installed, and can be used in a wide range in the axial direction by moving the position of the slitting groove S on the corrugated cardboard web due to an order change, thereby improving the durability. However, there are also a method in which the anvil cylinders 10a and 10b are movable in the axial direction, and a method in which the anvil cylinders 10a and 10b are forcibly driven to rotate in conjunction with the knife cylinders 7a and 7b. The long knife cylinder 7a in the figure is driven by two motors 8a and 8b connected to both ends of the shaft to reduce the torsion of the cylinder 7a. The motor 8 located on one side of the shaft similarly 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 configuration may be fixed to a movable member so that the movable member can be set to move in the width direction so as to be adapted to a slitting groove position of a traveling sheet. The configuration described above is not limited to the above embodiment, and various changes can be made without departing from the scope of the present invention, such as the arrangement of the knife cylinder.

[0011]

As described above in detail, according to the present invention, two knife cylinders are moved and adjusted to the slitting groove position of the traveling web, and each knife cylinder is adjusted in accordance with each sheet traveling speed and product length. Operate independently, two types of product sheets can be manufactured simultaneously on the same sheet traveling path without sorting the cardboard web vertically. As a result, various facilities for changing the traveling route of the cardboard web can be simplified, and the manufacturing cost of the apparatus can be reduced. In addition, there is no need to take measures against bending due to a change in the traveling route of the corrugated cardboard web, so that the distance between the slitter and the cutoff can be reduced, and the installation area and volume can be reduced. In addition to the cut-off, the corrugating machine as a whole can be reduced in size and weight in connection with the pre- and post-processes, making it easier to carry it into the customer's factory and installing it, and accompanying this, there are various costs associated with these. And excellent effects such as reduction of the amount can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a view as seen from arrows A to A in FIG.

FIG. 3 is a view as seen from arrows B to B in FIG. 1;

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

FIG. 5 is a side view of FIG. 4;

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

FIG. 7 is a side view of FIG. 6;

8 is a view as viewed from arrows C to C in FIG. 7;

FIG. 9 is a front sectional view of the rotary drum unit in FIG. 6;

[Explanation of symbols]

 1 Corrugated 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 Conveyer conveyor 17 Hollow knife cylinder 18 Hollow knife cylinder 19 Knife 20 Knife Reference Signs 21 shaft 22 shaft 23 frame 24 gear 25 gear 26 motor 27 gear 28 ruled line roll 29 slitter knife 30 sorting device 31 receiving roller 32 transport conveyor

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B26D 5/00 B26D 1/40 B26D 11/00

Claims (1)

(57) [Claims] 1. An upper cylinder having a long cutting knife on a peripheral surface thereof, and a lower anvil cylinder facing the same cylinder and rotating synchronously in the opposite direction, wherein a sheet-like material continuously running between the two cylinders is provided. in rotary drum type cutting apparatus, ibid cylinder the sheet to cut the length of
And are independently driven
It consists of two upper knife cylinder to be, and a straight line connecting the inner end of each knife of the upper Nye <br/> Fushirinda is the same sheet
While holding it parallel to the running direction,
A rotary drum-type cutting device, wherein a cutting cylinder is movable in the sheet width direction .