JP2511784B2 - Rotary cutter - 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 cutter for continuously cutting paper / paperboard to a specified length.

[0002]

2. Description of the Related Art Conventionally, a rotary cutter as shown in FIG. 10 has been used to continuously cut a paper or a board into a prescribed length. To explain the principle briefly,
Two knife drums with knives attached in the longitudinal direction,
It rotates in parallel at a short distance and cuts the blades by grinding them like scissors.

In FIG. 10, a paperboard 51 is first drawn out at a constant speed by a pinch roll device 52, cut into a uniform width by a slitter device 53, and further drawn by a feed roll device 54 for feeding to the next stage. Most of the known feed roll devices 54 are composed of a combination of an upper roll whose outer periphery is covered with a flexible material and a lower roll made of metal whose outer periphery is smooth, two of which are rotatably supported by pressure and pressed. , Only the lower roll is driven.
Then, slide on the guide plate 55 to move the knife drum device 5
It is cut by knife 57 and knife 58 according to the rotation of 6.
The next portion is cut when the knife drum device 56 has rotated half a turn. The cut board is carried by the conveyor 59. The knife drum device 56 is a combination of two rotating knife drums here, but in addition,
There is also a combination of one and a fixed knife drum.
Recently, two rotary knife drums as shown in Fig. 10 have been used for precision of cutting length when cutting continuously running paperboard to a specified length, aesthetics of cutting surface, and measures against paper dust generated during cutting. An increasing number of rotary cutters are driven by servo motors.

In FIG. 11, a plurality of paper rolls 66 are arranged side by side, a plurality of paper rolls are stacked while unwinding them, and the paper 68 in that state is fed to a rotary cutter feed roll device 60.
Is sent to the knife drum device 61, cut all at once into a prescribed length, conveyed by the conveyor 69, and stacked on the stacking device 70. The rotary cutter shown in FIG. 11 is a single rotary cutter that is equipped with a feed roll device 60 and a knife drum device 61, respectively, and is the same as the rotary cutter shown in FIG.
FIG. 2 shows a double rotary cutter equipped with two sets of feed roll devices 62 and 63 and knife drum devices 64 and 65, respectively. Several sheets of paper 66 are
After the widths are collectively cut and adjusted by the slitter device 67, the feed roll device 62 and the feed roll device 63
Knife drum device 6
At 4.65, it is continuously cut to a specified length.

[0005]

However, in these rotary cutters, replacement and adjustment of the knives attached to the knife drum require a high level of skill, and the adjustment is difficult and takes a long time. Moreover, the knife cannot be adjusted while driving. This is especially a problem with rotary cutters that cut paper, which is continuously produced from a paper machine, to a specified length. In other words, when it is necessary to replace or adjust the knife due to wear of the cutting edge, the operation of the paper machine must be stopped for a long time, and then it will take a lot of time and effort to restart the papermaking operation. There is a major drawback that the productivity of the machine is reduced.

Further, in the case of two knife drums, the two knife drums must be driven by using one or more servomotors and a mechanical non-backlash gear mechanism in order to achieve accurate synchronization, so the device becomes large. However, it becomes very expensive in terms of equipment and maintenance and inspection becomes difficult. The double type requires twice as much power equipment as the single type.
Moreover, unless the two knife drums have a precise positional relationship such as the spacing between the knife drums and the phase of rotation, the knives do not engage with each other and cannot be used. Since the bearing of the bearing is required, the conventional rotary cutter becomes expensive.
Adjusting the spacing between the two knife drums was not easy either. There is also a problem that the knife drum bends due to its own weight, and the cutting edge of the knife does not match, leaving uncut parts. Furthermore, in the above rotary cutter,
Although a feed roll device for feeding the paper to the knife drum device is required, since the distance between the feed roll device and the knife drum device is long, the traveling of the paper becomes unstable and the cutting accuracy deteriorates. Moreover, since it is attached to the front stage of the rotary knife drum, the installation space for the rotary cutter becomes large, which makes the device complicated and increases the cost.
There was also a problem.

[0007] In order to solve these problems,
When cutting paper or paperboard with a "cutting machine for veneer veneer" as disclosed in JP-A-3-32939, it is difficult to adjust the gap between the tip of the knife and the outer peripheral surface of the corresponding roll, and unlike veneer boards. It was very difficult to cut thin paper without causing uncut (cutting). In addition, FIG.
(Described in Japanese Utility Model Application Laid-Open No. 57-196515).
Paper and paperboard at the cutter fiber supply unit of the core forming device
It was very difficult to cut exactly. Explain why
I do. First, a pressing roll that sends fibers to the bladed roll 82.
81 and the rubber roll 83 are for strengthening the feeding force.
The outer layer of the roll base material is formed of a rubber layer. This push
Paper and board are sandwiched between the roll 81 and the rubber roll 83
When sent, the paper or paperboard is
Is pressed against a large diameter rubber roll 83. this thing
Is not a problem for soft fibers,
If the paper or paperboard lacking flexibility is discharged, the rubber roll 8
The question of turning back from 3 (floating)
A problem arises. In this state, remove immediately after the press roll 81.
The attached roll 82 with blade straightens the supplied paper or paperboard.
It cannot be cut to the exact dimensions. Moreover, it was cut
Paper and paperboard are warped, making printing difficult
There was also a problem.

[0008] The present invention has been proposed in view of the above problems, a smaller cheaper, height adjustment of the knife is able to easily even during operation, yet cutting accuracy rather high cutting of
It is an object of the present invention that the warp is paper or paperboard provides not name rotary cutter.

[0009]

In order to solve the above-mentioned problems, in a rotary cutter according to claim 1, a knife rotor having one or more knives mounted in the longitudinal direction on the outer peripheral surface, and the outer peripheral surface of said knife are A rotary cutter equipped with a plane rotor installed in parallel with a knife rotor at a position almost in contact with the blade edge and continuously cutting paper or paperboard to a specified length, a rotatable feed roll whose outer periphery is covered with a flexible material. and in a state of parallel to pressed against the surface hardness is high Purenrota, disposed immediately before the knife rotor, pre
The flatness is maintained between the rotor and the feed roll.
Nyflow of paper or paperboard that is pinched and conveyed and fed
It is configured so that it can be cut with a tap.

[0010] Also, in the rotary cutter of claim 2, and a knife rotor fitted with one or more knives on the outer circumferential surface longitudinally, parallel to the knife rotor to a position outer peripheral surface is in contact substantially the cutting edge of the knife In the rotary cutter provided with the provided plane rotor, the knife rotor was driven by a servo motor, and the plane rotor was driven by a variable speed motor.

Further, in the rotary cutter according to claim 3, one or more knives are attached on the outer peripheral surface in the longitudinal direction, and the knife rotor is provided parallel to the knife rotor at a position where the outer peripheral surface is substantially in contact with the cutting edge of the knife. In the rotary cutter including the plain rotor, one end of the plain rotor bearing rotatably supports the knife rotor bearing, and the other end includes a bearing support mechanism that supports the knife rotor bearing via the toggle mechanism. This mechanism is effective even if the plane rotor bearing and the knife rotor bearing have the opposite positional relationship.

Further, in the rotary cutter according to claim 4, the rotary cutter according to claim 3 is provided with a bearing pressurizing mechanism for urging the knife rotor shaft and the plane rotor shaft in a direction of approaching or separating from each other. At this time, the bearing support mechanism and the bearing pressurization mechanism are mounted side by side with the shaft. Both mechanisms have the same effect regardless of which side is attached to the inside.

Further, in the rotary cutter according to claim 5, one or more knives are mounted on the outer peripheral surface in the longitudinal direction, and the knife rotor is provided parallel to the knife rotor at a position where the outer peripheral surface is substantially in contact with the cutting edge of the knife. In a rotary cutter equipped with a plane rotor, a gap detecting means for detecting a gap between a knife tip attached to the knife rotor and an outer peripheral surface of the plane rotor, and the gap based on a signal from the gap detecting means. And a gap adjusting mechanism for adjusting.

[0014]

In the rotary cutter according to the present invention, the paper or paperboard sandwiched between the driven plane rotor and the feed roll continues at a constant speed along the outer periphery of the plane rotor immediately after the cutting stage. Sent to you. This
At that time, the surface hardness of the plane rotor was high, so it was pinched.
Do not apply uneven force to the front and back of paper or paperboard and
Does not come back. In the cutting stage, a knife attached to the outer peripheral surface of the knife rotor presses the paper or the paperboard against the outer peripheral surface of the plane rotor and pushes it down. By controlling the rotation of the knife rotor, this is continuously cut into a prescribed length .

[0015] In the rotary cutter 請 Motomeko 2, paper or paperboard, running at a suitable feed rate by Purenrota. The rotation of the knife rotor driven by the servomotor is controlled so as to match the feed speed of the plane rotor only when the knife contacts the paper or the board. According to another aspect of the rotary cutter of the present invention, one end of the knife rotor bearing is rotatably supported by the bearing support mechanism and the other end thereof is supported by the toggle mechanism. If you activate the toggle mechanism in this state,
The distance between the knife rotor and the plane rotor changes.

According to another aspect of the rotary cutter of the present invention, the bearing pressurizing mechanism applies pressure to the knife rotor shaft and the plane rotor shaft in a direction in which the knife rotor bearing and the plane rotor bearing approach or separate from each other, and The knife rotor bearing, the plane rotor bearing, and the bearings in the respective bearings, whose positional relationship is restricted, are restricted to eliminate play in the bearing support mechanism. Further, the bearing pressurizing mechanism applies a force in a direction to move the knife rotor shaft and the plane rotor shaft, which constrain the positional relationship by the bearing support mechanism, toward or away from each other, and corrects the knife rotor and the plane rotor bent by its own weight.

In the rotary cutter of the fifth aspect, the gap detecting means detects the gap between the tip of the knife attached to the knife rotor and the outer peripheral surface of the plane rotor.
Then, based on the signal output from the gap detecting means, the gap adjusting mechanism adjusts the distance between the knife tip and the outer peripheral surface of the plane rotor to an arbitrary interval.

[0018]

The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is an explanatory view of a rotary cutter according to the present invention, FIG. 2 is a schematic front view, FIG. 3 is an explanatory view of a gap adjusting mechanism, and FIG. 4 is a partially enlarged explanatory view of the rotary cutter of FIG. Is a sectional view of the knife rotor, FIG. 6 is a sectional view of an embodiment of the knife holder, and FIG. 7 is a schematic side view of the whole.

In FIGS. 1 and 2, reference numeral 1 denotes an elliptic cylindrical shape 2.
Knife rotor with knives on one side, 2 is a metal plain rotor with a hard outer peripheral surface, 3 is a feed roll that is placed as close as possible to the knife rotor 1 and is in pressure contact with the plane rotor, 4 is Paperboard to be cut, 5a and 5b are both knives attached to the knife rotor 1, and 6 is a slitter device for trimming the width of the paper, 7
Is a rotary encoder for detecting the rotation speed of the plane rotor in order to know the feeding speed of the paper board 4, 8 is a plain rotor bearing installed on the frame A, 9 is a knife rotor bearing, and 10 is a pinch roll device for pulling the paper board 4 at a constant speed. is there. Here, a conventional feed roll device may be used instead of the feed roll 3.

In FIG. 1, the paperboard 4 is first pulled by a pinch roll device 10 provided on the upstream side of the feed roll 3. The feed rate is
Is almost equal to the feed rate. The paperboard 4 exiting the pinch roll device 10 is trimmed at the end by a slitter device 6,
It is sandwiched between the feed roll 3 and the plane rotor 2 along the guide plate 13a, and is conveyed in the rotation direction of the plane rotor 2. Here, the feed roll 3 is installed close to the knife rotor 1 to the extent that the knives 5a and 5b do not touch when the knife rotor 1 rotates.

The rotational speed of the plane rotor 2 is constantly measured by the rotary encoder 7 provided in the plane rotor bearing 8 of FIG. 2 to calculate the length of the paperboard 4 to be actually fed, and at the same time, the knife in the state of FIG. The timing at which 5a begins to move to cut the paperboard 4 is calculated, and the servomotor 22 is controlled so that the knife 5a ′ of FIG. 4 first hits the specified cutting position of the paperboard 4 with the knife rotor 1
Is rotated and the moving speed of the knife 5a is adjusted to match the feeding speed until the paperboard 4 is cut thereafter.

While the knife rotor 1 rotates in this manner, the knives 5a and 5b alternately cut the board 4. The cut paperboard 4 is guided to the guide plate 13b,
It is carried by being sandwiched between the conveyor 12a and the conveyor 12b. When the board 4 is moving on the plane rotor 2, the knife rotor 1 stands by with the knife in FIG. 1 lying down. Here, in order to detect the feeding speed of the paper board 4, the rotation of the pinch roll device 10 provided on the upstream side of the feed roll 3 may be measured by the rotary encoder 11.

The feed roll 3 is a known one, and the bearing 3
The other end of the bearing 3b is rotatably supported by b and is rotatably connected to an air cylinder 3a which is rotatably supported by the plain rotor bearing 8. Feed roll 3
Is due to the pressure of the air cylinder 3a.
Is pressed against the outer periphery of. The support device for the feed roll 3 and the air cylinder 3a may be attached independently to the frame A. The feed roll 3 rotates along with the rotation of the plane rotor 2, so that the outer circumference of the feed roll 3 is covered with a soft material so as not to slip.

FIG. 4 shows how the knife 5a cuts the paper board 4, and the cut end is V-shaped with a slight angle, and the cut surface is almost straight. As shown in FIG. 4, the knife 5
The cutting action of a and 5b is basically push-cutting. There are two types of knives used here: straight blades and twist blades.
Both of the blades are V-shaped double blades, but a single blade, a two-stage blade, or the like may be used. In this embodiment, the knives 5a and 5b are known thin blades having a blade height accuracy of 5 μ or less.

The sectional shape of the knife rotor 1 is substantially elliptical or substantially regular polygonal as shown in FIG. Figure 5
(A) is one in which a knife is attached to one end of the major axis having a substantially elliptical cross section, (B) is the one used in FIG. 1, (C) is a regular triangle cross section, The same (D) has a square cross section, and the same (E) has a regular pentagonal cross section.
In each case, a knife is attached at the apex position in the cross section in the rotor longitudinal direction. In addition, the cross-sectional shape of the shaft core is determined so as to always pass through the center of gravity. With such a shape, when the rotary cutter of the present embodiment is started, by placing the knife at the standby position apart from the outer peripheral surface of the plane rotor, the paperboard 4 can easily pass between the knife rotor and the plane rotor. It becomes easier to set the paperboard 4.

FIG. 6 shows an example of attachment of the knife 5a to the knife rotor 1. In FIG. 6 (A), a knife holder 14 provided with a permanent magnet 21 is fixed to a groove 17 dug in the longitudinal direction of the knife rotor 1 with bolts 18, and the knife 5c is inserted into the resulting insertion groove 19. Then, the knife 5c is fixed to the knife rotor 1 by the iron adhering action of the magnet. The attachment is 2 when the length of the knife is about 2 m.
Finish within 0 seconds. In FIG. 6B, the O-ring 1
The knife holder 16 provided with the O-ring holder 15a in which 5 is inscribed is fixed to the parallel groove 17 with the bolt 18, and the knife 5c is inserted into the insertion groove 20 formed as a result. Are pressed against the opposite wall and fixed in the slot 20.

In any of the above cases, it is not necessary to use a specially adjusted knife, and it is possible to use an existing thin blade knife, so that the consumption cost of the knife can be reduced, and the finishing accuracy of the existing knife is high. Without it, it is securely attached to the knife attachment part. Of course, the grooves for attaching the knives 5a and 5b should be formed in the knife rotor 1 and the knife holder 14.1.
6 may be directly formed. Further, although the knife holder has a rectangular parallelepiped shape in the embodiment, it may have a wedge shape.

In FIG. 7, the knife rotor 1 requiring precise control of the number of revolutions is driven by a servomotor 22, but the plane rotor 2 may be of the same peripheral surface speed as the knife rotor 1 and may be synchronized. Since it is not necessary to control the rotation speed, it is not necessary to precisely control the rotation speed, and the motor is driven by a general AC variable speed motor 23 capable of adjusting the speed.

The rotation of the plane rotor 2 is measured by the rotary encoder 7 to accurately detect the fed length of the board 4, and the positions at which the knives 5a and 5b cut the board 4 are accurately obtained. The rotation speed of the knife rotor 1 is set so that the paperboard 4 is not torn or slackened during cutting.
Be sure to synchronize with the paper feed speed. The plane rotor 2 may be driven by a belt from a motor located at a remote position. The knife rotor 1 may have any rotation speed except when cutting.

In FIG. 2, in the bearing support mechanism, the end portion 8a of the plane rotor bearing 8 is the end portion 9a of the knife rotor bearing 9.
Is rotatably supported, and the other end 8b supports the end 9b of the knife rotor bearing 9 via the toggle mechanism 26. By rotating the micro-pitch screw 27 attached to the toggle mechanism 26, the toggle receiving member 36 moves, and the distance between the end 8b and the end 9b changes.

In FIG. 7, a support portion 38 is provided at both ends of the extension shaft of the plane rotor shaft 2a, and a support portion 39 is provided at the knife rotor shaft 1a.
Both ends of the extension shaft of a are rotatably provided, and air springs 24 are attached between them. In this state, when the air spring 24 expands, the support portion 38 and the support portion 39
Press against each other and rotate and tilt, and the connecting plate 47 prevents this. The upper part of the connecting plate 47 is fixed with bolts,
The lower part is slidably supported by the sliding groove 47a. Therefore, the support portion 38 and the support portion 39 move in parallel. The bearing pressurizing mechanism applies pressure to the knife rotor shaft 1a and the plane rotor shaft 2a to pressurize the knife rotor bearing 9 and the plane rotor bearing 8 in the direction of separating them from each other. But,
The two bearings are constrained by the bearing support mechanism so that the knife rotor 1 deflects downward and the plane rotor 2 deflects upward. When the board 4 is cut by the knife rotor 1, the central portion of the knife 4 bends upward, which may cause uncut portions. However, the above-mentioned action exerts a force on the central portion of the knife to prevent the uncut portions. Further, since the plane rotor 2 is bent downward by its own weight, it is also corrected by the above action.

Further, since the respective bearings inside the supporting portions 38 and 39 and the respective bearings inside the knife rotor bearing 9 and the plain rotor bearing 8 are pressed in a fixed direction, they do not rattle. Here, the support portion 38, the support portion 39, and the air spring 24 correspond to the bearing pressurizing mechanism. Instead of the air spring 26, an air cylinder, a hydraulic cylinder, or a coil spring may be used. Also,
The bearing pressurizing mechanism may be directly attached to the knife rotor 1 and the plane rotor 2.

In FIG. 3, the knife 5 of the knife rotor 1
The gap S between the tip of b and the outer peripheral surface of the plane rotor 2 emits light from the optical oscillator 29 provided in the plane rotor bearing 8, and the width of the light passed through between the blade edge of the knife 5a and the plane rotor 2 is detected by an optical sensor. By receiving light with the receiver 30 of
It is always accurately detected in units of 1 μ. The data is calculated by the control unit 31 and stored in the storage unit 32, and at the same time, the gap S is digitally displayed on the gap display unit 35b of the operation desk 35. The size of the gap S is set to a desired value by the gap adjusting portion 35a of the operation desk 35. Control it 31
In response to this, the instruction unit 33 sends a control signal to the motor 28 of the gap adjusting mechanism 34 to drive the gear box 25 and move the micro pitch screw 27 forward and backward. Here, the gap adjusting mechanism 34 is the toggle mechanism 2 as a bearing supporting mechanism.
6, a motor 28, a high reduction ratio gearbox 25 driven by the motor 28, and a screw 27 driven by the gearbox 25, and an oscillator 29.
The receiver 30 and the controller 31 correspond to the gap detecting means. When the clearance S is reduced, the screw 27 is moved forward and the toggle receiving member 36 is pushed in, so that the knife rotor bearing 9 is lowered, and as a result, the knife rotor 1 is lowered and the clearance S is reduced. When the clearance S is increased, the toggle support 36 comes out when the screw 27 is moved backward.
Rises.

Here, the air spring 2 as a bearing pressurizing mechanism
The expansion pressure of 4 is, as shown in FIG.
a acts to separate the plane rotor shaft 2a from the plain rotor shaft 2a, the toggle receiver 36 of the toggle mechanism 26 constantly pushes the screw 27 of FIG.
There is no need to connect 7 and. As a result, gearbox 2
5 can be installed independently of the toggle mechanism 26. Further, there is also an effect that the clearance of the micro-pitch screw 27 is eliminated and the backlash of the rotary encoder 37 is eliminated.

By providing the gap adjusting mechanism 34 and preliminarily storing the gap S in the storage unit 32 according to the type and number of sheets to be cut, the optimum knife pushing amount can be immediately controlled even if the type of paper is changed. The unit 31 can instruct. Here, the movement amount of the screw 27 can be accurately measured by the rotary encoder 37 provided at the end of the screw 27. The gap S has a contact position S = 0 with the plane rotor 2.
Can be adjusted in units of 1 μ in the range of −0.5 to +1.5 mm. Further, the control unit 31 of the gap detecting means obtains data such as the cutting condition of the knife at the time of cutting and the number of times of cutting,
By accumulating it in the storage unit 32, it is possible to know the exact time to replace the knife.

The paper 42 produced in the continuous process of the paper machine 40 shown in FIG. 8 enters the rotary cutter of the present invention through the gloss process and the like. The rotation of the plane rotor 41 substantially matches the paper delivery speed of the paper machine 40, and the rotation of the knife rotor 43 synchronizes the paper 42 to a specified length only when the knife cuts the paper 42. Cut it.

[0037]

The feed roll is covered with a material having a flexible outer circumference.
Since it is covered and pressed against the plane rotor, the paper to be sent
Or the paperboard will not slide on the plane rotor. Moreover,
Since the surface hardness of the plane rotor is high,
The paper or board sandwiched between the
In addition, the sheet is pinched and fed while the flatness is maintained .

[0038] According to the rotary cutter of 請 Motomeko 2,
Since the plane rotor does not have to be synchronized with the rotation of the knife rotor, it is possible to use a variable speed motor that is cheaper than a servo motor, or to drive with a belt etc. using an external drive device, which reduces equipment costs. It can be small. According to the rotary cutter of the third aspect, since the toggle mechanism is used as the bearing support mechanism, the distance between the knife rotor and the plane rotor can be easily changed, and the value can be reliably kept constant.

According to the rotary cutter of claim 4,
By the bearing pressurizing mechanism and the bearing support mechanism, since the respective bearings inside the knife rotor bearing and the plane rotor bearing are pressed in a fixed direction, there is no gap between the bearings and rattling of each support point of the bearing support mechanism.
It is possible to use very common bearings, easy to manufacture and maintain, and economical. In addition, the bearing pressurizing mechanism and the bearing supporting mechanism can correct the knife rotor and the plane rotor that are bent by their own weight to normal shapes, and cut the paper without leaving any uncut portion.

According to the rotary cutter of claim 5,
The gap detecting means can easily detect the gap between the knife tip and the outer peripheral surface of the plane rotor, and the data can be used to control the gap adjusting mechanism to adjust the gap during operation.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a rotary cutter according to the present invention.

FIG. 2 is a schematic front view.

FIG. 3 is an explanatory diagram of a gap adjusting mechanism.

FIG. 4 is an enlarged explanatory diagram at the time of cutting paper.

FIG. 5 is a cross-sectional view of five examples of knife rotors.

FIG. 6 is a sectional view of two embodiments of the knife holder when mounted.

FIG. 7 is a schematic side view.

FIG. 8 is a schematic front view of a rotary cutter used during a continuous process of a paper machine.

FIG. 9 is a schematic front view of a rotary cutter that cuts a stack of a plurality of paper rolls.

FIG. 10 is an explanatory view of a conventional single type rotary cutter.

FIG. 11 is a schematic front view of a conventional single-type rotary cutter that cuts a stack of a plurality of paper rolls.

FIG. 12 is a schematic front view of a conventional compound rotary cutter.

FIG. 13 Longitudinal section of the fiber supply section of conventional centrifugal molding equipment
It is a side view.

[Explanation of symbols]

 1,43 Knife rotor 2 Plane rotor 3 Feed roll 4 Paperboard 5a, 5b, 5c Knife 6 Slitter device 7 Rotary encoder 8 Plane rotor bearing 8a, 9a End (bearing support mechanism) 9 Knife rotor bearing 14, 16 Knife holder 15 O-ring 17 Groove 19, 20 Insertion groove 21 Permanent magnet 22 Servo motor 23 Variable speed motor 24 Air spring (bearing pressurizing mechanism) 25 Gear box (gap adjusting mechanism) 26 Toggle mechanism (bearing supporting mechanism) (gap adjusting mechanism) 27 Screw (gap) Adjusting mechanism) 28 Motor (gap adjusting mechanism) 29 Transmitter (gap detecting means) 30 Receiver (gap detecting means) 31 Control unit (gap detecting means) 34 Gap adjusting mechanism 38, 39 Supporting part (bearing pressurizing mechanism)

Claims (5)

(57) [Claims] 1. A paper or paperboard comprising: a knife rotor having one or more knives mounted in the longitudinal direction on the outer peripheral surface thereof; and a plane rotor provided parallel to the knife rotor at a position where the outer peripheral surface substantially contacts the cutting edge of the knife. a rotary cutter which continuously cut to a prescribed length, and distribution of the rotatable feed roll periphery is covered with a flexible material, with the surface hardness is parallel pressure contact with the high Purenrota, just before the knife rotor and set, Purenrota and off
Sandwiched with the flat roll while maintaining its flatness.
Knife the paper or board on the planer rotor
A rotary cutter characterized in that it can be cut by the rotor . 2. Paper or paperboard, comprising a knife rotor having one or more knives mounted on the outer peripheral surface in the longitudinal direction, and a plane rotor provided in parallel with the knife rotor at a position where the outer peripheral surface is substantially in contact with the cutting edge of the knife. In a rotary cutter that continuously cuts to a specified length, the knife rotor is driven by a servomotor, and the plane rotor is driven by a variable speed motor. 3. A paper or paperboard comprising: a knife rotor having one or more knives mounted on the outer peripheral surface in the longitudinal direction; and a plane rotor provided at the position where the outer peripheral surface is substantially in contact with the cutting edge of the knife in parallel with the knife rotor. In a rotary cutter that continuously cuts to a specified length, one end of the plain rotor bearing rotatably supports the knife rotor bearing, and the other end is equipped with a bearing support mechanism that supports the knife rotor bearing via a toggle mechanism. A rotary cutter characterized by that. 4. The rotary cutter according to claim 3, further comprising a bearing pressurizing mechanism for urging the knife rotor shaft and the plane rotor shaft in directions approaching or separating from each other. 5. A paper or paperboard comprising: a knife rotor having one or more knives mounted in the longitudinal direction on the outer peripheral surface, and a plane rotor provided at a position where the outer peripheral surface is substantially in contact with the cutting edge of the knife and parallel to the knife rotor. In a rotary cutter that continuously cuts to a specified length, based on the data from the gap detection unit that detects the gap between the knife tip attached to the knife rotor and the outer peripheral surface of the plane rotor, and the data from the gap detection unit. , A rotary cutter having a gap adjusting mechanism for adjusting the gap.