JPH1094995A - Rotary cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously manufacture paper of a plurality of specifications (sizes) by exactly cutting continuous forms of their pulled and properly arranged states. SOLUTION: Continuous paper 10 is cut into continuos paper sheets 10a, 10b by a trimming slitters 1a, 1a and a width determining slitter 1b and the continuous paper sheets 10a, 10b are supplied to a cutter part A in a state that they are pulled and properly arranged on almost the same surface by a feed roll device 2. The cutter part A is the one in which two knife rotors 4a, 4b are coaxially arranged. The continuous paper sheet 10a and the continuous paper sheet 10b are cut by driving the knife rotor 4a by a driving shaft by a servo motor 6a and by driving the knife rotor 4b by a timing belt 6c by a servo motor 6b, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cutter for continuously cutting continuous paper to simultaneously obtain cut sheets of a plurality of sizes having different widths and lengths.

[0002]

2. Description of the Related Art Paper manufactured continuously by a paper machine or paper of a specified width wound in a roll is drawn and cut, and cut sheets of a plurality of sizes having a desired width and length are simultaneously formed. Conventionally, for example, a rotary cutter as shown in FIG. 17 has been used. The rotary cutter in FIG. 17 is generally called a double type full synchro cutter (hereinafter, referred to as a synchro double cutter).
Two full synchro cutters as shown in FIG. 18 are provided. The full synchro cutter is a rotary cutter that cuts the continuous paper 80, which is deprived of its ears by a slitter device 71 and conveyed by a feed roll device 72, by a knife drum device composed of an upper knife drum 73 and a lower knife drum 74. It is. The two knife drums 73 and 74 tuned in rotation are equipped with a knife 7 attached to each.
5.75 is rubbed like scissors, and the continuous paper 80 is cut off one after another.

[0003] There are two types of cutters for cutting paper: an on-cutter that cuts continuous paper manufactured continuously by a paper machine, and an off-cutter that cuts by stacking a plurality of rolls of paper of a specified width. is there. The synchro-double cutter of FIG. 17 is an on-cutter, and continuous paper 70 which is continuously produced by a paper machine is drawn out at a constant speed by a pinch roll device 69, and both ears are separated by an ear slitter of a slitter device 61. At the same time, the intermediate portion is cut by a width-determining slitter to obtain two continuous papers 70a and 70b having a predetermined width. The continuous paper 70a thus obtained is pulled by the first feed roll device 62a and sent to the first knife drum device 63a rotating at a predetermined rotation speed.
It is cut to a predetermined length by a knife attached thereto. This operation is the same for the continuous paper 70b.
The sheet is pulled by the second feed roll device 62b and cut into a predetermined length by the knife of the second knife drum device 63b, so that cut sheets 70c and 70d of a predetermined standard are obtained. Each of the cut sheets 70c and 70d is carried by the conveyor 64, and a stacker (not shown) attached to the end thereof.
And are shipped as standard products.

[0004]

However, in the above-mentioned synchronized double cutter, the first and second feed roll devices and the first and second knife drum devices cannot be arranged unless they are shifted back and forth or up and down. Therefore, when all these devices are stored, there is a problem that the synchro double cutter is inevitably large and expensive.

In addition, there is a problem that a part of the moving path of the continuous paper to be cut must be inclined, and the running of the continuous paper becomes unstable. Similarly, since there is a difference in height between the cutting position of the continuous paper and the mounting surface of the conveyor, there has been a problem that the cut sheet that has been cut falls in an unstable state due to free fall, and the gripping defect of the conveyor is likely to occur. .

In the case of a synchro-double cutter, it is necessary to operate a plurality of full-synchro cutters in which it is difficult to change or adjust a single knife, so that the adjustment is very difficult. Highly skilled workers could finally make adjustments over a long period of time. In addition, if the rotation timing of the two knife drums is slightly out of order, the paper cannot be cut off, which is unstable. The fact that the operation is unstable and it takes time to adjust is a problem that must be solved, especially in the case of an on-cutter that requires continuous cutting of continuous paper that is continuously produced by a paper machine. there were.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and it is possible to cut a continuous paper in a aligned state accurately and to simultaneously manufacture papers of a plurality of standards (sizes). It is intended to provide a simple rotary cutter.

[0008]

According to a first aspect of the present invention, there is provided a rotary cutter which cuts a continuous sheet into a predetermined width in a cutter section of the rotary cutter which cuts the continuous sheet in a direction orthogonal to a conveying direction. In a state in which the knife rotor and the plane rotor are arranged on substantially the same plane, the knife rotor and the plane rotor each having a knife attached thereto are disposed on each of the continuous paper, and the knife rotor and the plane rotor are arranged. At least one of the driving means can be driven by the driving means, and each driving means can be individually driven to rotate.

Further, in the rotary cutter according to the second aspect, each knife rotor of the rotary cutter according to the first aspect is coaxially arranged. Further, in the rotary cutter according to the third aspect, each knife rotor of the rotary cutter according to the first aspect is disposed before and after in the transport direction of the continuous paper. In the rotary cutter according to the fourth aspect, the knife of the rotary cutter according to any one of the first to third aspects is spirally mounted.

The rotary cutter according to claim 5 is
The rotary cutter according to any one of claims 1 to 3, further comprising a width determining slitter configured to cut the continuous paper in a supply direction and supply the continuous paper to the cutter unit in a state where the continuous paper is aligned in a predetermined width and substantially on the same plane. The width determining slitter, the knife rotor and the plane rotor are provided so as to be movable in a direction orthogonal to the continuous paper supply direction, and the knife rotor and the plane rotor are configured to be movable in conjunction with the movement of the width determining slitter. .

The rotary cutter according to claim 6 is
The rotary cutter according to any one of claims 1 to 3, wherein the feed roll device that transports the continuous paper to the cutter unit in a state where the continuous paper is aligned includes a pre-rotor and one feed rotor that abuts in parallel with the pre-rotor. It consisted of. The rotary cutter of claim 7 is
Each knife rotor of the rotary cutter according to any one of claims 1 to 3 was driven by a servomotor.

The rotary cutter according to claim 8 is
Each knife rotor of the rotary cutter according to any one of claims 1 to 3 was formed in an elliptical column shape or a polygonal column shape, and a knife was attached to a side portion thereof. Claim 9
The rotary cutter according to any one of claims 1 to 3, wherein one end of the plain rotor bearing of the rotary cutter rotatably supports the knife rotor bearing, and the other end supports the knife rotor bearing via a toggle mechanism. A bearing support mechanism is provided.

According to a tenth aspect of the present invention, there is provided a rotary cutter provided with a bearing pressurizing mechanism which urges the plane rotor bearing and the knife rotor bearing of the rotary cutter according to the ninth aspect in a direction of approaching or separating. The rotary cutter according to claim 11 is the rotary cutter according to any one of claims 1 to 3, wherein a groove is provided in a longitudinal direction of an outer peripheral surface of each knife rotor, and a knife holder is fitted into the groove. The knife holder of the knife holder was provided with knife holding means for holding the knife with play.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the rotary cutter according to the present invention will be described below in detail with reference to the drawings by showing some embodiments.

FIG. 1 is a schematic explanatory view from the front of a paper cutting apparatus using a rotary cutter according to a first embodiment.
2 is a schematic perspective view of a rotary cutter portion of the paper cutting device of FIG. 1, FIG. 3 is a schematic plan view of the rotary cutter of FIG. 2, FIG. 4 is a schematic side view of the rotary cutter of FIG.
FIG. 5 is a longitudinal sectional view of the knife rotor, and FIG. 6 is a front view of bearings of the knife rotor and the plane rotor.

As shown in FIG. 1, the rotary cutter according to the first embodiment includes a cutter section A, a slitter device 1, and a feed roll device 2. Reference numeral 9 denotes a pinch roll device that draws out continuous paper 10 that is continuously manufactured from a paper machine (not shown) and sends the continuous paper 10 to the slitter 1 at a precisely controlled constant speed. The feed roll device 2 is a continuous paper 1 cut in the transport direction by the slitter device 1.
This is a device that feeds 0 to the cutter section A in a uniform manner. The cutter section A includes a plane rotor 3 and a knife rotor 4.
a · 4b, and continuously cuts the continuous paper 10 into a plurality of standard cut sheets having different widths and lengths. The outer diameters of the knife rotor 4a and the knife rotor 4b are formed equal.

In this embodiment, the widths L1 and L2 shown in FIG.
It is assumed that two types of cut sheets, a cut sheet L having a length L2 and a cut sheet H having a width H1 and a length H2 slightly smaller than that, are obtained.

As shown in FIG. 2, the slitter device 1 comprises:
Ear slitters 1a, 1a arranged near both side edges of the continuous paper 10 to cut off both ears of the continuous paper 10, and finished cuts in which the ends of the knife rotors 4a and 4b are arranged upstream of adjacent positions. And a width determining slitter 1b for determining the width of the sheet. The slitters 1a, 1a, and 1b are of a push type in which a disk-shaped knife having a blade formed on an outer peripheral edge is pressed against a cylindrical lower rotor, and the continuous paper 10 passing between the two is cut in a transport direction. The slitter is arranged upstream of the feed roll device 2. The width determining slitter 1b is a continuous paper 10
The blades are provided so as to be movable in a direction orthogonal to the transport direction, and two blades are attached with a predetermined interval S therebetween. The moving position of the width determining slitter 1b is accurately detected by the encoder 1c.

As shown in FIG. 3, three slitters 1a
1a and 1b are arranged according to the width L1 of the cut sheet L and the width H1 of the cut sheet H. The interval S between the two blades of the slitter 1b is larger than the interval between the adjacent knives 5a of the knife rotor 4a and the knife 5b of the knife rotor 4b.
There is no possibility that the center end of b is left uncut.

Here, the peripheral speed of the plain rotor 3 is detected by the encoder 3a so that the continuous paper 10 supplied to the cutter unit A does not sag or be pulled, and based on the data, the pinch roll device 9, The rotation speed of the feed roll device 2 is controlled to be constant.

The width of the feed roll device 2 is formed to be slightly wider than the width of the paper cut by the ear slitters 1a. Ear slitters 1a and 1a and feed roll device 2
Is fixed to the base. Further, the outer peripheral surface of the plane rotor 3 is formed of a hard metal so as to be hardly worn when the knives 5a and 5b of the knife rotors 4a and 4b are pressed, and to be hardly cut off on the paper to be cut. I have.

The knife rotor 4a is provided with two knives 5a in the longitudinal direction on the outer peripheral surface, and the knife rotor 4b is similarly provided with two knives 5b. The knife rotor 4a is directly driven to rotate by a servomotor 6a, and the knife rotor 4b is driven to rotate by a servomotor 6b via a timing belt (toothed belt) 6c. The knife rotors 4a and 4b are provided with knives 5a and 5a attached thereto.
The rotation of the servomotors 6a and 6b is controlled by the servomotors 6a and 6b so that the 5b and 5b synchronize with the peripheral surface speed of the plane rotor 3 when approaching the outer peripheral surface of the plane rotor 3.

As shown in FIG. 3, the length of the knife 5a is substantially equal to the width of the knife rotor 4a, and the length of the knife 5b is substantially equal to the width of the knife rotor 4b. Installed. The width of the plane rotor 3 and the width of the knife rotors 4 a and 4 b are sufficiently larger than the width of the cut continuous paper 10. Knife rotor 4a
The internal structure of the knife rotor 4b is as shown in the sectional view of FIG. 5, and the knife rotor 4a is integral with the rotating shaft 4c,
A cylindrical knife rotor 4b is rotatably attached to a portion near the knife rotor 4a via a bearing 4d. The rotating shaft 4c is supported by bearings 4e.

As shown in FIG. 4, the base 8 to which the cutter portion A is attached is supported by a plurality of wheels 8b... 8b mounted on rails (not shown).
It is configured to be movable in the axial direction of 4b (left and right direction in FIG. 4). When the paper width slitter 1b is moved, the encoder 1c accurately detects the position and outputs position data. Based on the position data, the motor 8a rotates by a predetermined amount, and the rotation rotates the screw 8c attached to the rotating shaft of the motor 8a, so that the base 8 on which the double cutter A is mounted moves, The portions adjacent to 5a and 5b are fixed at the downstream position of the paper width slitter 1b.

As shown in FIG. 6, the knife rotor bearing 4e
Are supported by the plain rotor bearing 3e by the bearing support mechanism 21. The bearing support mechanism 21 includes a rotary shaft 21a that rotatably supports one end of the knife rotor bearing 4e, and a toggle mechanism 21b that supports the other end. The knife rotor bearing 4e is moved up and down by turning the knob 21d to move the joint portion of the toggle mechanism 21b up and down with the screw 21c, and the height position of the knife rotor 4, in other words, the blade edges of the knives 5a and 5b and the plane rotor. 3 can be adjusted with respect to the peripheral surface. As shown in FIG. 12, bearing pressurizing mechanisms 22 are attached to both ends of the rotating shaft 3c of the plane rotor 3 and the rotating shaft 4c of the knife rotor 4a. The bearing pressurizing mechanism 22 is a mechanism that adjusts the hydraulic pressure of the hydraulic cylinder 22a to urge the end of the rotating shaft 3c and the end of the rotating shaft 4c toward or away from each other.

As shown in FIG. 7A, the knives 5a and 5b are attached to a knife holder screwed into a groove provided in the longitudinal direction of the outer peripheral surface of the knife rotors 4a and 4b. That is, the knife holder 5c is screwed into the groove 4f of the knife rotor 4a, and the knife holder 5c is
The knife 5a is attached to the knife mounting part 5d of c. A permanent plate magnet 5e as a knife holding means is adhered to the knife mounting portion 5d.
a from the back, the knife 5a becomes a permanent plate magnet 5
e does not come off. Further, as can be seen from the drawing, the space into which the knife 5a is to be inserted is larger than the thickness of the knife 5a, and the knife 5a moves slightly during cutting.

Next, the operation of the rotary cutter will be described with reference to FIGS. As shown in FIG. 1, the continuous paper 10 that has passed through the pinch roll device 9 is pulled by the feed roll device 2 with a predetermined tension. Continuous paper 10
Enters the slitter device 1 in front of the feed roll device 2, the ear portions are cut off by the ear slitters 1a at both ends, and the middle portion is removed by the width S by the width determining slitter 1b. Thus, the continuous paper 10a having the width L1 and the continuous paper 10b having the width H1 shown in FIG. 3 are obtained. The continuous papers 10a and 10b are both pulled by the feed roll device 2, and the plain rotor 3 and the knife rotor 4 facing the same.
a and 4b. The rotation speed of the plane rotor 3 is constantly measured by the encoder 3a shown in FIG. 6, and the length of the supplied continuous paper 10 is calculated. At the same time, the timing at which the knives 5a and 5b cut the continuous paper 10a and 10b cut into strips by the slitter device 1 is calculated, and the respective servomotors 6a and 6b are controlled based on the timing to control the continuous paper 10a. ,
10b is cut.

The plane rotor 3 includes a pinch roll device 9,
Although rotating at a constant speed in synchronization with the feed roll device 2, the speed of the knife rotors 4a and 4b is controlled by servo motors 6a and 6b so that the continuous papers 10a and 10b can be cut at predetermined positions. Each is rotating individually while being adjusted. In this embodiment, since the knife rotor 4b needs to cut the continuous paper 10b at short intervals, the movement (rotation) from the time of cutting to the time of the next cutting moves faster than the knife rotor 4a.

When the continuous paper 10a is to be fed by the length L2, the knife rotor 4a rotates, and the knife 5a presses the continuous paper 10a against the plane rotor 3 and pushes it to the length L2.
Cut into two. Thus, a cut sheet L having a width L1 and a length L2 is obtained. Similarly, the continuous paper 10b has a length H2
When only the paper is to be fed, the knife rotor 4b rotates, and the knife 5b presses the continuous paper 10b against the plane rotor 3 and cuts it into a length H2 to obtain a cut sheet H having a width H1 and a length H2.

The cut sheets L and H of the two different standards are conveyed by a conveyor 7 having the same width as the pinch roll device 9 and stacked on a stacker (not shown) attached to the end thereof to produce products of different standards. Each is stacked as.

The operation of the cutter unit A when newly obtaining two types of cut sheets of a different standard from the cut sheets L and H will be briefly described. For example, two types of cut sheets having substantially the same size are obtained at the same time. At this time, the width determining slitter 1b is moved in accordance with two desired paper widths. This moving amount is detected by the encoder 1c of the width determining slitter 1b, and the moving motor 8
a so that the adjacent portions of the knife rotor 4a and the knife rotor 4b come to the downstream position of the width determining slitter 1b.
The base 8 is moved (right side in FIG. 3). The cutting position of the width determining slitter 1b is closer to the center of the continuous paper 10. At this time, it goes without saying that the side edges of the continuous papers 10a and 10b do not protrude from the knife 5b. Thus, the continuous papers 10a and 10b
Are separately rotated and driven by knife rotor knives 4a and 4a
b is cut into desired lengths by the knives 5a and 5b.

In the above example, a gap was provided between the continuous papers 10a and 10b using the two-bladed slitter 1b.
A gap S may be provided by using a single-blade slitter and attaching a separator downstream of the slitter. Alternatively, two single-slit slitters may be arranged shifted upstream and downstream to provide a gap of a predetermined width at the center of the continuous paper. The means for transmitting power to the knife rotor is not limited to the timing belt, but may be any type such as a V-belt, a chain, a gearbox, etc., as long as it does not slip during power transmission.

In the above example, the slitter is moved to the plane rotor together with the knife rotor. However, the plane rotor may be fixed in accordance with the width of the continuous paper, and only the knife rotor may be moved. Figure 7 shows how to attach the knife.
(B) may be used. That is, the permanent plate magnet 5
The knife 5a may be pressed against the groove wall 4g of the knife rotor 4a and held by using an O-ring 5f instead of e.
Since the O-ring 5f is made of rubber, the knife 5a is held with play without falling off.

(Embodiment 2) Next, the rotary cutter of Embodiment 2 will be described with reference to a schematic perspective view of FIG. 8 and a schematic explanatory view from the front in FIG. The rotary cutter of the second embodiment has a feed rotor 12 instead of the feed roll device 2 of the rotary cutter of the first embodiment. The feed rotor 12 is a rotatable rotor whose outer periphery is covered with a flexible material, and is a knife rotor 1.
The knives 4a and 14b are provided on the upstream side of the position where the continuous paper 20 is cut in a state of being in parallel contact with the plane rotor 13. The feed rotor 12 is a plain rotor 1
3 and is movable in a direction perpendicular to the conveying direction in conjunction with a cutter section B comprising the knife rotors 14a and 14b.

Each of the knife rotors 14a and 14b has a substantially elliptical cross-sectional shape, and two knives attached to the respective rotors are attached to the sides (farthest sides from the rotation center axis). The knife rotor 14a is rotated by a servo motor 16a that rotationally drives a rotating shaft 14c, and the knife rotor 14b is rotationally driven by a timing belt by a servo motor 16b.

The continuous paper 20 drawn by the rotation of the plane rotor 13 and the feed rotor 12 is fed to the knife rotor 14.
It is cut to a predetermined length by the knife a.14b.

As shown in the sectional view of FIG. 10, three knife rotors 11a, 11b and 11c are formed coaxially, the center knife rotor 11b is rotated by a rotating shaft 11d, and the knife rotors 11a and 11c on both sides are rotated by a timing belt. They may be driven separately. In this way, three types of cut sheets can be obtained at one time. Of course, it is necessary to provide two width determining slitters.

Further, four or more knife rotors may be arranged coaxially and driven separately.

The shape of the knife rotor is shown in FIG.
(B) As shown in (C), the cross section may be a regular polygonal column. The trajectory drawn by the blade edge of the knife when these knife rotors rotate is circular as in the case of the knife rotor of the above embodiment. The cross section of the knife rotor 17 is a regular triangle, the cross section of the knife rotor 18 is a square, and the cross section of the knife rotor 19 is a regular pentagon.

As shown in FIG. 12, the knife 25a
25a to the knife rotor 24a, knives 25b and 25
b may be spirally mounted on the knife rotor 24b, and the continuous paper 30 may be cut. Knife 25a
25a, 25b, and 25b are knife rotors 24, respectively.
a and 24b are attached at a predetermined angle with respect to the axial direction. The rotating shafts 24c of the knife rotors 24a and 24b are installed at the same angle as the predetermined angle with respect to the traveling direction of the continuous paper 30. Knife rotor 24
a is driven by a timing belt 26c, and the knife rotor 24b is driven by a rotating shaft 24c.

The moving speed of the knives 25a and 25b when they come into contact with the continuous paper 30 must be adjusted to the advancing speed of the continuous paper 30 to be advanced.
The rotation speed of 4b is precisely controlled by a servomotor (not shown). In this way, the continuous paper 30
Is cut smoothly at right angles from the edges. Knife 25a
The moving speed of 25b is free when not in contact with the continuous paper 30. In the figure, the knife 25b having a shorter cutting interval (short paper length) has to move to the next cutting standby position more quickly than the knife 25a, so that the knife 25b is not in contact with the continuous paper 30 ( Time to cut)
The knife rotor 24b is rotating faster than the knife rotor 24a.

In the conventional single type full synchro cutter shown in FIG. 18, the upper knife drum 73 is replaced with a knife rotor composed of a plurality of knife rotors, and the upper knife drum 74 is replaced with a plain rotor, and one of the knife rotors is driven to rotate. , A rotary cutter that can obtain two types of cut sheets at a time can be realized.

(Embodiment 3) As shown in a schematic perspective view of FIG. 13, the rotary cutter of Embodiment 3 requires two knife rotors 3 to obtain cut sheets of two sizes.
4a and 34b are disposed before and after with respect to the transport direction of the continuous paper 40. The rotary cutter according to the third embodiment includes a slitter device 31, a feed roll device 32, and a cutter unit C. The cutter section C includes a plane rotor 33a and a knife rotor 34 opposed thereto.
a, and a plane rotor 33b and a knife rotor 34b facing the plane rotor 33b. Knife rotor 34a
Are provided with two grooves for attaching knives to the entire width, but the two knives 35a are mounted only at the width position where the continuous paper 40a is cut. Similarly, the knife rotor 34b is provided with two grooves for attaching knives to the entire width, but the two knives 35b are attached only to the width position where the continuous paper 40b is cut.

The continuous paper 40 is cut by the slitter 31 into two continuous papers 40a and 40b. Continuous paper 40
The feed rollers a and 40b are supplied by the feed roll device 32 between the plane rotor 33a and the knife rotor 34a on the upstream side of the cutter section C. Here, only the continuous paper 40a is continuously cut to form a cut sheet 40c.
Since the continuous paper 40b does not have a knife attached to a portion where the continuous paper 40b passes, the plain rotor 33a and the knife rotor 34
It passes through the gap a without being cut. Continuous paper 40b
Is cut by the knives 35b of the next knife rotor 34b to form a cut sheet 40d. The cut sheet 40c cut first passes through the gap between the plane rotor 33b and the knife rotor 34b. Since the interval between the plane rotor 33a and the plane rotor 33b of the cutter section C is actually short, the cut sheets 40c and 40d are not jammed here, but are attached to the end thereof by the conveyor 37 provided near the discharge section from the plane rotor 33b. Transported to a stacker (not shown).

(Embodiment 4) FIG. 14 is a schematic plan view of a rotary cutter of Embodiment 4, and FIG. 15 is a schematic explanatory view from the front of a paper cutting device provided with the rotary cutter of FIG. As shown in the schematic plan view of FIG. 14, the rotary cutter of the fourth embodiment has two knife rotors 44a and 44.
b is disposed before and after with respect to the transport direction of the continuous paper 50. The cutter part D is a plain rotor 43a / 43b.
And knife rotors 44a and 44b opposed thereto, and are attached to a base 48. Knife rotor 44
The width of a * 44b is formed sufficiently larger than the width of the continuous paper 50. The knife 45a cuts only the continuous paper 50a, and the knife 45b cuts only the continuous paper 50b (so that the cut portions do not overlap).
a and the knife rotor 44b are attached to one side respectively. The base 48, based on the data of the encoder 41c that detects the position of the width determining slitter 41b,
It is configured to move in the width direction of the continuous paper 50.

In FIG. 14, for example, when it is desired to obtain two types of cut sheets having different sizes, the width determining slitter 41b is moved upward (to the left in the conveying direction of the continuous paper 50). Then, the base 48 also moves upward by the same distance in conjunction with the movement, so that two types of desired cut sheets having different sizes from the current one can be easily obtained at the same time.

(Fifth Embodiment) FIG. 16 is a schematic plan view of a rotary cutter according to a fifth embodiment. In the rotary cutter of the fifth embodiment, as shown in the schematic plan view of FIG. 16, two knife rotors 54a and 54b are arranged in front and rear with respect to the transport direction of the continuous paper 60, and are slightly shifted left and right. To use. The knife rotor 54a and the plane rotor 53a facing the knife rotor 54a are fixed on a base 58a.
Similarly, the knife rotor 44b is fixed on a base 58b.

The base 58a and the base 58b can be independently moved in the width direction of the paper 60 as shown in the figure. When used, the position of the width determining slitter 51b is adjusted according to the paper width of a desired size, the knife rotor 54a cuts only the continuous paper 60a, and the knife rotor 54b cuts the continuous paper 60a.
base 58a and base 58b at a position where only b is cut.
And move.

The rotary cutter of the fifth embodiment can be used as an ordinary rotary cutter for obtaining only one size cut sheet by rotating only the knife rotor 54a.

[0050]

According to the rotary cutter of the first aspect, only one feed roll device is required, and the entire device can be manufactured small and inexpensively. Further, since the continuous paper is cut in a state where the continuous paper is aligned on substantially the same plane, the cutting accuracy is also increased, the running of the paper is stabilized, and the gripping of the conveyor hardly occurs.

According to the rotary cutter of the second aspect,
Since the knife rotor is arranged coaxially, the installation space can be reduced, and only one plane rotor is required, which is economical. According to the rotary cutter of claim 3, a knife rotor having a simple structure can be used,
It can be cheap.

According to the rotary cutter of the fourth aspect,
Since the continuous paper is not cut off instantaneously, but is cut smoothly from the edge, it can be cut smoothly and quietly, and the cut surface is beautiful. According to the rotary cutter of the fifth aspect, the width determining slitter and the knife rotor are provided so as to be movable in conjunction with the direction orthogonal to the direction of transport of the continuous paper, and by moving these to an appropriate position, Cut sheets having different paper widths can be easily obtained.

According to the rotary cutter of claim 6,
Since the feed rotor is provided just before the knife rotor in parallel with the plane rotor, the distance between the feed rotor and the knife rotor is the shortest, and free running of the paper is extremely short, so that the running of the paper is stabilized. In addition, higher cutting accuracy can be obtained. Further, a feed roll device is not required, the entire device is simplified, the space required for installation is smaller, and the cost can be reduced.

According to the rotary cutter of claim 7,
Since each knife rotor is driven by a servo motor,
The cutting position of the continuous paper can be accurately controlled. According to the rotary cutter of the eighth aspect, the flywheel effect is small and the rotation driving force is small as compared with the conventional cylindrical knife rotor, so that the rotation can be easily controlled. In addition, as the number of side portions increases, the number of knives can be increased, so that the rotation angle per cut is small, and many portions can be cut with a small number of rotations.

According to the rotary cutter of the ninth aspect,
Since the toggle mechanism is used as the bearing support mechanism, fine adjustment of the distance between the plane rotor and the blade edge of the knife can be easily performed. According to the rotary cutter of the tenth aspect, since the bearing support mechanism and the bearing pressurizing mechanism are provided, both the bearings inside the knife rotor bearing and the plain rotor bearing are pressed in one direction, which causes rattling in the rotation of the knife rotor. Absent. Further, even if the knife rotor or the plane rotor is bent by its own weight, it can be corrected, and the paper can be cut without cutting.

According to the rotary cutter of the eleventh aspect, since the knife holding means holds the knife with play, the impact at the time of cutting is absorbed, and the cutting sound is reduced. Further, even if the peripheral surface is displaced from the knife rotor, the knife moves and absorbs its function, so that there is an effect that the cut surface is not cleaned and the cutting surface is not cut off.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view from the front of a paper cutting device provided with a rotary cutter according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view of the rotary cutter of FIG.

FIG. 3 is a schematic plan view of the rotary cutter of FIG.

FIG. 4 is a schematic side view of the rotary cutter of FIG. 1;

FIG. 5 is a schematic sectional view of a knife rotor of the rotary cutter of FIG. 1;

FIG. 6 is a front view of a knife rotor and a plane rotor of the rotary cutter of FIG. 1;

FIG. 7 is a sectional view of knife holding means of the knife rotor.

FIG. 8 is a schematic perspective view of a rotary cutter according to a second embodiment.

FIG. 9 is a schematic explanatory view from the front of the rotary cutter of FIG. 8;

FIG. 10 is a schematic sectional view of a knife rotor of a rotary cutter according to another embodiment.

FIG. 11 is an explanatory view of a knife rotor according to another embodiment.

FIG. 12 is a plan view of a knife rotor on which a knife is spirally mounted.

FIG. 13 is a schematic perspective view of a rotary cutter according to a third embodiment.

FIG. 14 is a schematic plan view of a rotary cutter according to a fourth embodiment.

FIG. 15 is a schematic explanatory view from the front of a paper cutting device provided with the rotary cutter of FIG. 14;

FIG. 16 is a schematic plan view of a rotary cutter according to a fifth embodiment.

FIG. 17 is a schematic explanatory view from the front of a paper cutting device using a conventional double type full synchro cutter.

FIG. 18 is a perspective view of a conventional full synchro cutter.

[Explanation of symbols]

A, B, C, D Cutter section 1, 11, 31 Slitter device 1a Ear slitter 1b, 41b, 51b Width determining slitter 2, 12, 32 Feed roll device 3, 13, 23, 33a, 33b, 43a, 43b Plane rotor 3e Plane rotor bearing 4e Knife rotor bearing 4a, 4b, 11a, 11b, 11c, 14a, 14
b, 17, 18, 19, 24a, 24b, 24c, 34
a, 34b, 44a, 44b, 54a, 54b Knife rotor 4c, 14c, 24d, 34c Rotating shaft 4f Groove 5a, 5b, 15a, 15b, 25a, 25b, 35
a, 35b, 45a, 45b, 55a, 55b Knife 5c Knife holder 5d Knife mounting part 5e Permanent plate magnet (knife holding means) 5f O-ring (knife holding means) 6a, 6b, 16a, 16b Servo motor (driving means) 7 , 37 Conveyor 8,48,58a, 58b Base 9 Pinch roll device 10,10a, 10b, 20,30,40,40a, 4
0b, 50, 50a, 50b, 60, 60a, 60b
Continuous paper 12 Feed rotor 21 Bearing support mechanism 21b Toggle mechanism 22 Bearing pressurizing mechanism

Claims (11)

[Claims] 1. A rotary cutter provided with a cutter section for cutting continuous paper in a direction orthogonal to a conveying direction, wherein the continuous paper is supplied to the cutter section in a state where the continuous paper is arranged on a substantially same plane with a predetermined width. In addition, a knife rotor and a plane rotor each having a knife attached thereto are arranged on each of the continuous papers, and at least one of the knife rotor and the plane rotor can be driven by a driving unit, and each of the driving units can be individually driven to rotate. A rotary cutter characterized in that: 2. The rotary cutter according to claim 1, wherein each knife rotor is arranged coaxially. 3. The rotary cutter according to claim 1, wherein each knife rotor is disposed before and after with respect to a direction in which the continuous paper is transported. 4. The rotary cutter according to claim 1, wherein the knife is spirally mounted. 5. A width-determining slitter for cutting a continuous paper in a conveying direction and supplying the continuous paper to a cutter portion in a state where the continuous paper is arranged in a predetermined width and substantially on the same plane, and the width-determining slitter and the knife rotor are continuously connected. The knife rotor according to any one of claims 1 to 3, wherein the knife rotor is configured to be movable in a direction orthogonal to the paper conveying direction and the knife rotor is movable in conjunction with the movement of the width determining slitter. Rotary cutter. 6. A feed roll device for transporting continuous paper to a cutter section in a state where the continuous paper is aligned, comprising a plane rotor and a single feed rotor abutting in parallel with the plane rotor. 4. The rotary cutter according to any one of 3. 7. The rotary cutter according to claim 1, wherein each knife rotor is driven by a servomotor. 8. The rotary cutter according to claim 1, wherein each of the knife rotors is formed in an elliptical or polygonal column shape, and a knife is attached to a side portion thereof. 9. The apparatus according to claim 1, wherein one end of the plain rotor bearing rotatably supports the knife rotor bearing, and the other end is provided with a bearing support mechanism for supporting the knife rotor bearing via a toggle mechanism. 4. The rotary cutter according to any one of 3. 10. The rotary cutter according to claim 9, further comprising a bearing pressurizing mechanism for urging the plain rotor bearing and the knife rotor bearing toward or away from each other. 11. A groove is provided in the longitudinal direction of the outer peripheral surface of each knife rotor, a knife holder is fitted in the groove, and knife holding means for holding the knife with play in the knife mounting portion of the knife holder is provided. The rotary cutter according to any one of claims 1 to 3, wherein: