JP2003292190A - Sheet transporting device of cutter in corrugate machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem in a cutter of a corrugate machine that the suction acting as a brake causes the failure in cutting, when a sheet of a narrow width and a long cutting length is produced, as the suction force of a sheet transporting device is determined corresponding to the production of a sheet of a narrow width and a short length. <P>SOLUTION: This sheet transporting device of the cutter in the corrugate machine comprises an upstream-side sheet transporting device and a downstream-side sheet transporting device respectively having a suction device, and a control device in which the suction force corresponding to each of sheets to be produced is determined in advance, and the suction force of at least one of the sheet transporting device or each of the sheet transporting devices is determined to the predetermined suction force corresponding to the produced sheet. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter sheet conveying device in a corrugating machine for producing corrugated board sheets.

[0002]

A corrugating machine for producing a corrugated board sheet S produces a continuous single-sided corrugated board sheet with a single facer (not shown), supplies the single-faced corrugated board sheet to a double facer (not shown), and uses the double-facer to produce the single-sided corrugated board. A continuous corrugated board sheet is produced by pasting the sheet and back liner together. Then, the continuous corrugated board sheet is fed to a slitter scorer (not shown) located on the downstream side of the double facer,
Ruled lines and cutting are performed in the sheet conveying direction according to the order produced by the slitter scorer. afterwards,
The cutter 58 shown in FIGS. 12 and 13 cuts for each production order size, is stacked for each order by a stacker arranged on the downstream side of the cutter 58, is discharged from the corrugated machine, and is printed on the sheet. It is sent or shipped to the box making process that processes such as.

As described above, the cutter 58, which cuts the corrugated cardboard sheets S which are continuously fed in the transport direction, for each production order size, has the frames 38, 38 as shown in FIGS. 12 and 13. An upper cutter cylinder 39 having an upper cutter knife 40 and a lower cutter cylinder 41 having a lower cutter knife 42 are rotatably supported by sandwiching a corrugated paperboard sheet feeding line PL, and a command from a cutter management device 57 is received. For example, a driving device 43 such as a servomotor is operated, and the upper cutter cylinder 39 and the lower cutter cylinder 41 rotate in opposite directions, and the corrugated cardboard sheet S to be fed is cut into each production order size. To do. An upstream sheet conveying device 44 and a downstream sheet conveying device 49 are arranged on the upstream side and the downstream side of the cutter 58, respectively.

The upstream sheet conveying device 44 includes an upstream roller 46 rotatably supported between frames 45 and 45.
a and a downstream roller 46b are provided, a belt-shaped suction belt 47 is wound, and a suction box 48 is provided. Then, the lower side sheet conveying device 4
9 has basically the same configuration as the above-described upstream sheet conveying device 44, and is provided with a downstream roller 51a and a downstream roller 51b that are rotatably supported between the frames 50, 50. A belt 52 in a belt shape is wound and a suction box 53 is arranged.

Next, as shown in FIG. 13, the suction drive mechanism moves inside the suction box 48 provided in the upstream sheet conveying device 44 and the suction box 53 provided in the downstream sheet conveying device 49. A suction blower 55 for making a negative pressure and a drive device 56 for driving the suction blower 55 are provided, and the suction blower 55, the suction box 48 of the upstream side sheet conveying device 44, and the suction box 53 of the downstream side sheet conveying device 49. Each is configured to be ventilated via ducts 54a, 54b. The suction blower 55 is activated by the drive device 56 that receives a command from the control device 57, and the suction blower 5 is activated.
5 is actuated, and by the operation of the suction blower 55, a negative pressure is created in each of the suction boxes 48, 53 via the duct 54, and the suction belts 47, 52 that rotate on the surfaces of the suction boxes 48, 53 are formed. The sheet is adsorbed and conveyed. It should be noted that the cutter in the corrugating machine generally has a cutter knife 40,
Since 42 is a so-called helical cutter attached in a helical shape, the upper and lower cylinders 39 and 41 are inclined by a predetermined angle with respect to the sheet conveying direction.

[0006]

Since the corrugating machine produces according to each order, in the machine width direction, from the maximum paper width Wl of the corrugating machine as shown in FIG. Paper is fed to a minimum paper width Ws of about one half. Further, the sheet cutting length is from the maximum cutting length Ll which is a stacking dimension of a stacker (not shown) located on the downstream side of the cutter to the minimum cutting length Ls corresponding to the corresponding speed of the cutter to the production speed of the corrugated machine. Processing is performed corresponding to a wide variety of production. In such a production mode, the various types of sheets S are produced by the cutter of the corrugating machine having the above-described configuration. Depending on the form of the produced sheet, the upstream sheet conveying device 44 and the downstream side of the cutter 58 may be produced. Accurate cutting may not be performed depending on the suction action of the side sheet conveying device 49.
Upstream and downstream sheet conveying device 4 of the cutter 58
The suction force of 4, 49 is always a preset suction force and is constant in the production of any sheet. Then, generally, the suction force is set in accordance with a sheet having a narrow paper width and a sheet having a short cutting length, which are hardly affected by suction in production. That is, in recent years, the corrugating machine has a production rate of 200 meters per minute and a maximum production rate of about 300 meters per minute. At such a corrugating machine production speed, it takes a short time for the cutter 58 to pass through the upstream and downstream sheet conveying devices 44 and 49. For example, when the machine dimension of the upstream and downstream sheet conveying devices 44, 49 in the sheet conveying direction is 1 meter, the sheet advancing at 300 meters per minute is the sheet conveying device 44, 4 concerned.
The time to pass over 9 is only about 0.2 seconds. Therefore,
When a sheet with a narrow paper width or a sheet with a short cutting length that is difficult to receive the effect of suction is conveyed at high speed, the effect of suction must be exerted within this short time, and the suction force inevitably becomes strong. I don't get. However, conversely, a sheet having a wide paper width or a sheet having a long cutting length is easily affected by suction, and the cutter may affect the cutting dimension.

Specifically, as shown in FIG. 14, when the paper width is wide and the cutting length is long, the suction force per unit area received by the sheet is increased in the upstream side and downstream side sheet conveying devices, and the sheet leading edge is increased. When a part reaches the downstream side sheet conveying device 49 and comes into contact with the suction belt, a large braking force is generated, or the suction force of the upstream side and downstream side sheet conveying devices 44, 49 produces a braking effect, so The cutting length may be slightly shorter than the sheet cutting size. That is, in FIG. 14, it is desired to cut at the order size L1, but the order is cut at the defective cutting size L2 which is shorter than the order size L1 by the error amount L3. Further, as shown in FIG. 15, when a sheet having a narrow cutting width and a long cutting length is produced, the sheet is received by the upstream side and downstream side sheet conveying devices as in the case where the paper width is wide and the cutting length is long. The suction force per unit area becomes large, and the suction force may cause a braking effect, resulting in a cutting length slightly shorter than the sheet cutting dimension in the relevant order. That is, in FIG. 15, the order dimension L
I want to cut at 4, but the error amount L6 from the order size L4
Therefore, the defective cutting dimension L5 is short. If the suction force is set to a small value, a sheet with a narrow paper width and a short cutting length cannot obtain a sufficient braking effect, and the inertia force accompanying the conveying speed of the sheet conveyed at high speed prevails. Since it is not possible to reliably suck and convey the sheets by the conveying devices 44 and 49, and sheet conveyance trouble occurs, the suction force cannot be set small in advance.

The present invention solves the problems inherent in the above-described sheet conveying device for a cutter in a corrugated machine, and can always perform cutting work on a paper width and a cutting length of any production order with the cutting length of the order. The present invention provides a sheet conveying device.

[0009]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and preferably achieve an intended purpose, the present invention provides a cutting portion for cutting continuously fed sheets into a desired cutting length. In a cutter of a corrugating machine, an upstream sheet conveying device that sucks continuously fed sheets and conveys the sheets to a cutting portion of the cutter, and a downstream side that sucks and conveys sheets cut by the cutting portion A sheet conveying device and a controller that presets the suction force of the sheet conveying device corresponding to the sheet to be produced, and the suction force of at least one of the sheet conveying devices is preset to correspond to the sheet to be produced. It is a sheet conveying device for a cutter in a corrugating machine, which is characterized in that the suction force is set.

Further, in a cutter of a corrugating machine having a cutting portion for cutting continuously fed sheets to a desired cutting length, the continuously fed sheets are sucked and conveyed to the cutting portion of the cutter. An upstream sheet conveying device, a downstream sheet conveying device that sucks and conveys the sheet cut by the cutting unit, and a controller that presets the suction force of the sheet conveying device corresponding to the sheet to be produced. A sheet conveying device for a cutter in a corrugating machine, which has suction forces of an upstream sheet conveying device and a downstream sheet conveying device set to a preset suction force corresponding to a sheet to be produced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a sheet conveying device for a cutter in a corrugated machine according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view suitably showing a sheet conveying device for a cutter in a corrugating machine according to the present invention. The basic constitution of the cutter is the same as that of a conventional cutter, and the sheet conveying device has almost the same constitution as the sheet conveying portion. Is equivalent. The structure will be described. As shown in FIG. 1, the cutter 1 is rotatably supported by sandwiching a corrugated paperboard sheet feeding line PL that feeds an upper cutter cylinder 3 and a lower cutter cylinder 5 to frames 2 and 2. An upper cutter knife 4 and a lower cutter knife 6 are attached to the upper cutter cylinder 3 and the lower cutter cylinder 5, respectively. The upper cutter knife 4 and the lower cutter knife 6
The upper cutter cylinder 3 and the lower cutter cylinder 5 attached with are driven by a drive device 7 such as a servo motor in response to a command from the cutter control device 26, and the upper cutter cylinder 3 and the lower cutter cylinder 5 are By rotating in opposite directions, the upper cutter knife 4 and the lower cutter knife 6 mesh with each other, and the corrugated board sheet S fed from the upstream side is cut into each production order size. Upper cutter cylinder 3 and lower cutter cylinder 5 of the cutter 1
The corrugated sheet S fed to the upstream side and the downstream side of the upper cutter cylinder 3 and the lower cutter cylinder 5 respectively.
An upstream sheet conveying device 8 and a downstream sheet conveying device 17 for feeding and discharging are arranged between them.

The upstream sheet conveying device 8 is provided with an upstream roller 10a and a downstream roller 10b which are rotatably supported by a driving device (not shown) between the frames 9 and 9, and the rollers 10a and 10b are connected to each other. A belt-shaped belt 11 that conveys the sheet S is wound. The belt 11 may be a belt having an effective width of the entire width in the machine width direction, or a plurality of belts having a desired width arranged at predetermined intervals in the machine width direction to form a sheet conveying device. The belt 11 is generally a suction conveyor belt, and the belt has numerous holes. A suction box 12 is provided between the frames 9 of the upstream side sheet conveying device 8.
The sheet S conveyed through the suction belt 11 is attracted to the belt 11 and fed between the upper cutter cylinder 3 and the lower cutter cylinder 5.
A device that applies a suction force to the suction box 12 will be described later.

Subsequently, the lower sheet conveying device 17
The upstream side sheet transporting device 8 has basically the same configuration, and a downstream roller 19a and a downstream roller 19b that are rotatably supported by a driving device (not shown) are provided between the frames 18 and 18. Then, the belt-shaped belt 20 that conveys the sheet S is wound around the rollers 19a and 19b. The belt 20 may be a belt having an effective width of the entire width in the machine width direction or a plurality of belts having a desired width arranged at predetermined intervals in the machine width direction to form a sheet conveying device. Further, the belt 20 is generally a suction conveyor belt, and the belt has numerous holes. And the suction box 21 is arranged,
The sheet cut by the upper cutter cylinder 3 and the lower cutter cylinder 5 is adsorbed to the suction belt 20 and conveyed from the upper cutter cylinder 3 and the lower cutter cylinder 5 toward the downstream process. Generally, a downstream sheet conveying device 17 of a cutter in a corrugating machine separates a sheet cut by an upper cutter knife 4 and a lower cutter knife 6 from a succeeding sheet S, and is arranged downstream of the cutter 1. In order to form the best shingling state with a shingling conveyor (not shown), the sheet is driven at a speed slightly higher than the line speed of a so-called corrugating machine, which is the speed of the upstream sheet conveying device. Therefore, there is a slight gap between the sheet cut by the upper cutter knife 4 and the lower cutter knife 6 of the cutter 1 and the succeeding sheet.

Next, a suction drive mechanism for generating a suction action in the suction box 12 arranged in the upstream sheet conveying device 8 and the suction box 21 arranged in the downstream sheet conveying device 17 will be described. As shown in FIG. 1, the suction drive mechanism includes a suction blower 14 for making a negative pressure in the suction box 12 arranged in the upstream side sheet conveying device 8, a drive device 15 for driving the suction blower 14, and the drive device. A rotation measuring device 16 such as a pulse generator that measures the rotation amount of the device 15 and calculates the suction amount of the suction blower 14 from the rotation amount of the drive device 15 is provided. Then, it is configured so that ventilation can be performed via the suction box 12 and the duct 13 of the upstream side sheet conveying device 8. Similarly, a suction blower 23 for making a negative pressure in the suction box 21 arranged in the downstream side sheet conveying device 17, and the suction blower 2
A drive device 24 for driving the motor 3 and a rotation measuring device 25 such as a pulse generator for measuring the amount of rotation of the drive device 24 and calculating the suction amount of the suction blower 23 from the amount of rotation of the drive device 24 are provided. Then, it is configured so that ventilation can be performed via the suction box 21 and the duct 22 of the downstream side sheet conveying device 17. Subsequently, the respective suction blowers 14 and 23 are configured such that the respective drive devices 15 and 24 in response to a command from the control device 26 are individually activated to operate the respective suction blowers 14 and 23. By the operation of the blowers 14 and 23, the inside of each suction box 12 and 21 becomes negative pressure according to the operation amount of the suction blowers 14 and 23 via the ducts 13 and 22, respectively, and the same or different suction amount can be obtained. Then, the sheet is sucked and conveyed by the suction belts 11 and 20 rotating on the surfaces of the suction boxes 12 and 21 where the respective suction forces are obtained. Since the cutter in the corrugated machine is generally a so-called helical cutter in which the cutter knives 40 and 42 are helically attached to the upper and lower cylinders 39 and 41, the upper and lower cylinders 39 and 41 are seated. It is the same as the conventional one in that it is inclined by a predetermined angle with respect to the transport direction.

Subsequently, the control device 2 for controlling the drive devices 15, 24 for operating the suction blowers 14, 23, respectively.
6 will be described with reference to FIG. In the control device 26, the cutter 1 of the corrugated machine controls the driving devices 15 and 24 in accordance with the order in the production. Therefore, the driving in accordance with the suction amount of the suction blowers 14 and 23 according to the production order is performed. A storage unit 33 having data corresponding to the rotational drive amounts of the devices 15 and 24, and an operation unit for comparing and operating various data extracted from the storage unit 33 and various production information obtained from the management device 27 described later. And a control unit 32 having 34. Then, the control device 26 inputs the speed data 28, paper width data 29, cutting length data 30 and the like regarding the production order from the production management device 27 of the corrugated machine.
1 and various data input from the input unit 31 and data preset in the storage unit 33 described above.
And an output unit 35 for transmitting a command to each drive device 15, 24 based on the result calculated by the control unit 32. Further, the output unit 35 transmits information such that the result calculated by the control unit 32 and the production information are displayed on the display unit 36.

Data corresponding to the rotational drive amounts of the drive devices 15 and 24 corresponding to the suction amounts of the suction blowers 14 and 23 according to the production order is preset in the storage unit 32 described above. Various types of data or setting types are conceivable for the data, and the data types and setting types described below are not limited, but only one data type will be described. As shown in FIG. 3, for example, the data types are set in a two-dimensional matrix with the suction force of the suction blowers 15 and 23 in the suction boxes 12 and 21 based on the paper width and the cutting length. be able to. Specifically, as shown in FIG. 3, the paper width area for passing the paper is taken in the vertical column, the cut length area by the cutter 1 is taken in the horizontal column, and the suction boxes 12, 21 in the respective intersecting area ranges are set. Set the suction power. This set value expresses the final suction force in each suction box 12, 21. As a control means in the control device 26, each suction box 12 or 21 can obtain the suction force. The drive control of the drive units 15 and 24 for operating the drive units 14 and 23 is performed. Then, as a means for confirming whether or not the suction force is obtained in each suction box 12, 21, for example, a rotation measuring device 16, which measures the amount of rotation of each drive device 15, 24, is provided for each drive device 15, 24. 25 is provided, and the rotation measuring instrument 1
The measurement results 6 and 25 are transmitted to the control unit 32 of the control device 26 to control whether or not the set suction force is obtained.
For the confirmation and the control thereof, the rotation measuring devices 16 and 25 may be attached to the suction blowers 14 and 23 to directly detect the rotation amounts of the suction blowers 14 and 23, or the suction boxes 12 and 23, respectively. A flow meter or the like may be attached to 21 or the suction blowers 14 and 23 to directly measure and confirm and control the suction force.

The set values of these suction forces are empirically shown in FIG.
Through the relationship shown in FIG. That is, generally, as shown in FIG. 4, if the paper becomes wider, the suction force must be weakened, and as shown in FIG. 5, if the cutting length is longer, the suction force must be weakened. When the paper width and the cutting length are related in a complex manner, the suction force must be weakened when the paper width is wide and the cutting length is long as shown in FIG. From the above relationships, the optimum suction force may be set from the table values shown in FIGS. 4 to 6, or as shown in FIG. 3, each table displayed in FIGS. 4 to 6 described above. The suction force may be set by setting various paper width areas and cutting areas from values or empirical measurement values. Further, as shown in FIGS. 4 to 6, the table values are set according to the sheet configuration to be produced and the production speed, and the table values corresponding to the production are set to set the suction box 12 to each suction box 12. , 21 may be suction forces. Also, the above-mentioned matrix and 2
The various setting values on the dimension table may be preset invariable setting values or empirically rewritable setting values based on the result of the production. Further, in the suction control in the sheet conveying device, as shown in FIGS. 3 and 6, a suction force may be set based on the relationship between the paper width and the cutting length and applied to the sheet conveying devices 8 and 17, respectively. Figure 5
As shown in, the suction force may be set for each paper width or cutting length and applied to each of the sheet conveying devices 8 and 17.

Further, the control set value of the suction force in the sheet conveying device shown in FIG. 11 corresponds to the cutting length for individually controlling the action of the suction force in the sheet conveying device for each of the upstream sheet conveying device and the downstream sheet conveying device. It is the figure which expressed the relationship of suction force on the two-dimensional table. Specifically, as shown in FIG. 11, the paper width region for passing the paper is taken in the vertical column, the cut length region by the cutter 1 is taken in the horizontal column, and the upstream side sheet conveying device and the downstream side in each cut length region are taken. A set value frame of the sheet conveying device is provided, and the suction force in each suction box 12, 21 is set in each intersecting region range. This set value expresses the final suction force in each suction box 12, 21. As a control means in the control device 26, each suction box 12 or 21 can obtain the suction force. Each drive device 1 for operating 14, 23
5, 24 drive control is performed.

The operation of the sheet conveying device for the cutter in the corrugating machine will be described. When the corrugated cardboard sheets S continuously produced on the upstream side of the cutter 1 reach the cutter 1, the cutter 1 concerned.
In the control device 26 of the above, the speed data 28, the paper width data 29, and the cutting length data 3 in the production are sent from the production management device 27.
Various data such as 0 is transmitted via the input unit 31. Then, based on the various data, the control device 26 sets the suction box 12 and the suction belt 11 in the upstream sheet conveying device 8 of the cutter 1 which are set in advance.
Sheet suction force data by the downstream sheet conveying device 1
The sheet suction force data obtained by the suction box 21 and the suction belt 20 in FIG. Then, the calculation unit 34 in the control unit 32 of the control device 26 fetches the above-mentioned various production data 28, 29, 30 and performs arithmetic processing to determine the suction force in each sheet conveying device 8, 17. At this time, the suction force of the upstream sheet transporting device 8 and the suction force of the downstream sheet transporting device 17 may be the same or different suction forces depending on the production order. In addition, the sheet conveying devices 8 and 17
One of them does not change the suction force, and only the other one changes the suction force as described above. It is generally considered that it is preferable to change the suction force of the downstream sheet conveying device 17 according to the order of production, but this is not always the case. And the output unit 3
5 to the suction blowers 14 and 2 for making the suction boxes 12 and 21 of the sheet conveying devices 8 and 17 negative pressure.
The driving devices 15 and 24 for driving the driving device 3 are driven and controlled, and the data are displayed on the display unit 36. The suction blowers 14 and 23 operate by being driven by the driving devices 15 and 24, negatively pressurizing the inside of the suction boxes 12 and 21 through the ducts 13 and 22, respectively, and the suction boxes 12 and 21 and the suction belt 11 respectively. , 20 are set to the set sheet suction state.

For example, in the case of the disclosure in FIG. 7, the paper width is wide (Wa) and the cutting length is long (La) in the production order, so that the various data disclosed in FIGS. 3 to 6 and 11 described above are used. , The suction force of each of the sheet conveying devices 8 and 17 is controlled to be weak or relatively weak according to the production order. In the case disclosed in FIG. 8, the sheet width is wide (Wa) in the production order, but the cutting length is short (Lb). Therefore, according to the various data disclosed in FIGS. 3 to 6 and FIG. The suction force of the devices 8 and 17 is set and controlled to a medium suction force. In the case disclosed in FIG. 9, the paper width is narrow (W
b), the cutting length is also short (Lb), so that the above-described FIGS.
Also, based on the various data disclosed in FIG. 11, the suction force by the sheet conveying devices 8 and 17 is set or controlled to be stronger or relatively stronger according to the production order. In the case disclosed in FIG. 10, the paper width is narrow in the production order (W
b) Since the cutting length is long (La), from the various data disclosed in FIG. 3 to FIG. 6 and FIG. 11 described above, the suction force by each of the sheet conveying devices 8 and 17 is not weak, but compared to medium. Control the setting weakly.

Further, the suction force in the above-described upstream sheet conveying device 8 and downstream sheet conveying device 17 may be controlled as disclosed in FIG. That is, the suction force of the upstream sheet transporting device 8 and the suction force of the downstream sheet transporting device 17 may be controlled to different suction forces according to the order of production. Furthermore, in all of the above-described embodiments, the paper width or cutting length or the paper width and the cutting length of the sheet that produces the suction force of the sheet conveying devices 8 and 17 is preferentially determined and controlled, but in addition to these requirements, For example, α, β, γ in FIG. 4 or FIG. 5 or FIG. 6 for each production rate
You may make it have each table value as shown in FIG. Specifically, when the production speed is less than 150 meters per minute,
When the same 150-200 meters, when the same 200-250 meters, when the same 250-300 meters, the same 3
It may be a table value corresponding to each speed region such as when it exceeds 00 meters, or may be controlled in a linear or quadratic curve based on the production speed axis. Similarly, control may be performed in the same manner as the above-described control that requires the speed, depending on the flute configuration of the corrugated cardboard sheet, the paper quality of the back liner that is in direct contact with the sheet conveying devices 8 and 17, and the surface processing. The paper quality includes, for example, C liner, K liner, and white liner, and the surface processing includes, for example, water repellent processing and resin coating processing. In each case, since the surface friction coefficient is different, each sheet conveyance device has its own suction force table value, and the control device or the operator intervenes to select the suction table value in the relevant production, and the most optimal in the relevant production. Set the suction power.

Further, in the above-described sheet conveying device, the suction force control with respect to the set value at the time of production is performed by measuring the rotation value of the driving device for driving the suction blower and calculating the suction force from the measured value. 1 and 7, in addition to the method for measuring the suction force by providing a diversion meter in the suction blower and the suction box and measuring the air volume in the suction blower and the suction box. As disclosed, the cutting length of the sheet cut by the cutter 1 may be actually measured, the effectiveness of the suction force in the sheet conveyance device may be determined from the measured value, and the suction force may be controlled. Specifically, the cutting length of the sheet S cut by the cutter 1 is measured, and when the measurement result is shorter than the production order size, the braking effect is generated because the suction force is strong as described above. It is a means for controlling so as to weaken the suction force. Various types of sheet cutting length measuring means are conceivable. As an example, a contact type is a measuring roll type that uses a roller and a pulse generator that measures the number of revolutions of the roller, and is a non-contact type. In the case of the type, there are an optical detector using a laser beam or an ultrasonic wave, an image processing detector using a CCD camera or the like.

The suction action of each of the sheet conveying devices described above is such that the control device receives the production order from the production management device described above each time the production order changes, and the control device receives the most appropriate suction force corresponding to the production order. Order change is performed so as to derive and give to each sheet conveying device.

[0024]

According to the sheet conveying device for the cutter of the corrugating machine of the present invention, the sheet conveying device for the upstream side and the sheet for conveying the downstream side of the cutter are in accordance with the production order of corrugated cardboard sheets produced by the corrugating machine and various conditions. Since the sheet suction force of the transport device can be controlled respectively, in the production concerned, the upstream sheet transport device that feeds the sheet toward the upper cutter cylinder and the lower cutter cylinder of the cutter, and the sheet cut by the cutter and discharged from the cutter The downstream sheet conveying device can perform the best sheet conveyance. Therefore, since the sheet is conveyed at the line speed of the corrugating machine in accordance with the line speed of the corrugating machine, the sheet to be cut by the cutter is cut according to the set dimensions in the production order. Therefore, the cutting error defect due to the problem that the sheet does not match the line speed, which has occurred conventionally, does not occur.

Further, when the sheet cut by the cutter arrives at the downstream side sheet conveying device, the optimum suction force is set according to the order to be produced. This eliminates the occurrence of defective cutting error due to the braking force.

[Brief description of drawings]

FIG. 1 is a plan view preferably showing a cutter and a sheet conveying device in a corrugating machine of the present invention.

FIG. 2 is a control block diagram for controlling a suction blower for generating a suction force of the sheet conveying device and a suction action by the suction blower in the present invention.

FIG. 3 is a diagram showing a relationship between the action of the suction force in the sheet conveying apparatus and the suction force with respect to the cutting length on a two-dimensional table.

FIG. 4 is a diagram showing the relationship between the suction force and the sheet width of the suction force in the sheet conveying device on a two-dimensional table.

FIG. 5 is a diagram showing a relationship between the action of the suction force in the sheet conveying device and the suction force with respect to the cutting length on a two-dimensional table.

FIG. 6 is a diagram showing the action of the suction force in the sheet conveying device on a two-dimensional table showing the relation of the suction force with respect to the paper width and the cutting length.

FIG. 7 is an operation diagram when the paper width is wide and the cutting length is long.

FIG. 8 is an operation diagram when the paper width is wide and the cutting length is short.

FIG. 9 is an operation diagram when the paper width is narrow and the cutting length is short.

FIG. 10 is an operation diagram when the paper width is narrow and the cutting length is long.

FIG. 11 is a diagram showing, on a two-dimensional table, the relationship between the suction force and the cutting length for individually controlling the action of the suction force in the sheet conveying device for each of the upstream sheet conveying device and the downstream sheet conveying device.

FIG. 12 is a side view showing a configuration of a general cutter in a general corrugating machine.

FIG. 13 is a plan view showing a cutter and a sheet conveying device in a conventional corrugating machine.

FIG. 14 is an operation diagram disclosing a problem that occurs when the paper width is wide and the cutting length is long.

FIG. 15 is an operation diagram disclosing a problem that may occur even if the paper width is narrow and the cutting length is long.

[Explanation of symbols]

1 Cutter 3 Upper Cutter Cylinder 4 Upper Cutter Knife 5 Lower Cutter Cylinder 6 Lower Cutter Knife 8 Upstream Sheet Conveyor 11 Suction Belt 12 Suction Box 14 Suction Blower 17 Downstream Sheet Conveyor 20 Suction Belt 21 Suction Box 23 Suction Blower 26 Control apparatus

Claims (13)

[Claims] 1. A cutter of a corrugating machine having a cutting unit for cutting continuously fed sheets to a desired cutting length, in which the continuously fed sheets are sucked and conveyed to the cutting unit of the cutter. An upstream sheet conveying device, a downstream sheet conveying device that sucks and conveys the sheet cut by the cutting unit, and a controller that presets the suction force of the sheet conveying device corresponding to the sheet to be produced. Having a suction force of at least one of the sheet conveying devices,
A sheet conveying device for a cutter in a corrugating machine, wherein a preset suction force corresponding to a sheet to be produced is set. 2. The cutter sheet conveying device in a corrugating machine according to claim 1, wherein the control device presets a plurality of suction forces corresponding to the sheets to be produced. 3. The sheet conveying device for a cutter in a corrugating machine according to claim 2, wherein the suction force comprises a plurality of suction forces set corresponding to the paper width of the sheet to be produced. 4. The sheet conveying device for a cutter in a corrugating machine according to claim 2, wherein the suction force comprises a plurality of suction forces set corresponding to a cut length of a sheet to be produced. 5. The sheet conveying device for a cutter in a corrugating machine according to claim 2, wherein the suction force comprises a plurality of suction forces set corresponding to a paper width and a cutting length of a sheet to be produced. 6. The cutter sheet conveying device in a corrugating machine according to claim 2, wherein the suction force is set for any one of a production speed, a stage type, a sheet material, and the like, or a combination thereof. . 7. A cutter of a corrugating machine having a cutting section for cutting continuously fed sheets to a desired cutting length, sucking continuously fed sheets and conveying them to the cutting section of the cutter. An upstream sheet conveying device, a downstream sheet conveying device that sucks and conveys the sheet cut by the cutting unit, and a controller that presets the suction force of the sheet conveying device corresponding to the sheet to be produced. A sheet conveying device for a cutter in a corrugating machine, which has suction forces of the upstream side sheet conveying device and the downstream side sheet conveying device set to a preset suction force corresponding to a sheet to be produced. 8. The sheet conveying device for a cutter in a corrugating machine according to claim 7, wherein the controller presets a plurality of suction forces corresponding to sheets to be produced. 9. The sheet conveying device for a cutter in a corrugating machine according to claim 8, wherein the suction force is composed of a plurality of suction forces set corresponding to a paper width of a sheet to be produced. 10. The suction force comprises a plurality of suction forces set corresponding to a cut length of a sheet to be produced.
A sheet conveying device for a cutter in the corrugating machine described. 11. The sheet conveying device for a cutter in a corrugating machine according to claim 8, wherein the suction force comprises a plurality of suction forces set corresponding to a paper width and a cutting length of a sheet to be produced. 12. The sheet conveying device for a cutter in a corrugating machine according to claim 8, wherein the suction force is set for any one of a production speed, a stage type, a sheet material, or a combination thereof. . 13. A sheet conveying device for a cutter in a corrugating machine according to claim 8, wherein the upstream sheet conveying device and the downstream sheet conveying device are set to have different suction forces.