JPH09248788A - Order change device for corrugate machine, and cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact order change device and a cutting device, capable of shortening the length of the order changing range by cutting capabilities of a present undirectional cutting device as far as possible, capable of obtaining the cut shape having little jam-up, and having a simplified function. SOLUTION: In an order change device of a corrugate machine, a undirectional cutting device is provided on a rotatable frames 7 so as to travel on the frames, the frames 1 are inclined at the angles preset in relation to the traveling direction of a web 3 so as to be moved, and the order changing range is shortened in relation to the high-speed order change also under the limited cutting capabilities of the cutting device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an order change device for a corrugated machine for producing corrugated board and a cutting device used for the same.

[0002]

2. Description of the Related Art FIG. 8 is a layout drawing of a conventional corrugating machine on the downstream side of a rotary machine, and FIGS. 9 to 12 are explanatory drawings showing a conventional order changing method (how to make a lateral cut). It is shown.

In FIG. 8, 2 is a rotary,
The rotary machine 2 is provided with a knife cylinder 25 and an anvil cylinder 26, a knife 24 longer than the full width of the corrugated board web 3 is attached to the knife cylinder 25, and the anvil cylinder 26 is made of elastic material such as rubber. An anvil cover 27 consisting of a body is attached. Then, the rotary shear 2 cuts the corrugated board web 3 laterally by sandwiching and pressing the corrugated board web 3 between the knife 24 and the anvil cover 27.

Reference numeral 42 denotes a defect removing device, which cuts a paper splicing portion of the corrugated cardboard web 3 or a defective portion caused by other causes into a rectangular sheet having a constant length by continuously rotating the rotary shear two times or more. It has the function of eliminating downwards.

1a and 1b are slitter scorers, and the slitter scorers 1a and 1b have ruled line rolls 28a and 28a.
28b and slitter knife 29a, 29b are provided,
The creases of the cardboard box are processed by the ruled line rolls 28a and 28b, and the cardboard web 3 is cut into a predetermined width in the flow direction by the slitter knives 29a and 29b.

Reference numeral 22 denotes a cutoff, and the cutoff 2
2 cuts the cut web 5 cut by the slitter scorers 1a and 1b into a predetermined length in the direction perpendicular to the flow. 30
a and 30b are trim ducts.
Is for removing the trims 23a and 23b (see FIG. 9) by suction.

In the corrugated machine, sheets corresponding to various box sizes are produced. Such sea
As shown in FIG. 9, the situation of the production of the grate is that cutting and scoring (however, creases are not shown) are performed in the flow direction of the corrugated board web 3 by the slitter scorer 1a or 1b
Next, the upper and lower cutoffs 22a and 22b are cut in a direction perpendicular to the flow with cutting lengths Ld and Lt, and processed into corrugated board sheets having a predetermined size.

At this time, the size of the corrugated board sheet produced is not limited to one type at a time, but two cutoffs 22 (22a, 22b) are installed to produce sheets of two types of sizes. can do. 9 to 10 (similarly in the subsequent figures), the cutting web 5 processed by the cutoff 22b on the lower side is shown by a diagonal line rising to the right, and the cutoff 22a on the upper side is shown.
The cutting web 5 which is processed in step 3 is shown by the diagonal line descending to the right.

The order change is to change the predetermined box size. As shown in FIG. 9, the slitter scorers 1a, 1a, are used for old and new orders before and after the order change area.
It shows that the cutting width by 1b and the cutting length by the cutoff 22 are different.

For changing the setting of the cutting width by the slitter scorers 1a and 1b, for example, if the old order is processed by the slitter scorer 1a, the slitter scorer 1b slitters the cutting and ruled line positions of the new order during the production of the old order. A method is used in which the knife 29b and the ruled line roll 28b are set and the operating unit is switched at the time of order change. In addition, the cutoffs 22a, 2
The cutting length of 2b is performed by instantaneously switching an electric signal for controlling the rotation speed of the knife.

By the way, at the time of the above order change, FIG.
As shown in, if only the cutting width is changed, the cutting web 5 will be torn in the order change area before reaching the cutoff 22.

Therefore, conventionally, the corrugated cardboard web 3 is separated by the rotary shear 2 in the right angle direction over the entire width as shown by the one-dot chain line in FIG. 9, and is cut off by the rotary shear 2 on the upstream side assuming a predetermined order change area. A method of removing the order change area as a defective sheet by the defect removing device 42 has been adopted. By doing so, the cutting web 5 and the lower cutoff 22b going to the upper cutoff 22a of the new order are adopted. The cutting web 5 going to is completely cut off.

FIG. 10 is an improvement of FIG. 9, and in this method, an order change area having a predetermined length is provided in FIG. 9 together with improvement of switching accuracy of the slitter scorers 1a and 1b. In order to make the length as short as possible (because this changed area portion is defective paper), the slitter cutting portions of the old and new orders are wrapped and the wrap portion is separated by the rotary shear 2.

However, in the case of the methods shown in FIGS. 9 and 10, the leading end of the new order and the trailing end of the old order, which are cut by the rotary unit 2, become free due to separation. For this reason, the leading edge of the new order collides with the conveyance guide member during subsequent traveling and jams up, or meanders, and occurrence of defective cutting precision is observed. Further, the residual web between the rotary shear 2 and the cutoff 22 of the old order also causes a cutting accuracy failure due to meandering or the like.

In order to address the above problems, FIGS. 11 and 1 are used.
2, the upper and lower cutoffs 22a, 22b
Cut line N only between slitter lines M
A method of cutting with O was proposed. The example shown in FIG. 11 is when the deviation of the M line between the old and new orders is relatively small, and the webs 5 (a) and 5 (c) are on the lower side before and after the order change.
On the upper side, 5 (b), 5 (d), and 5 (e) are connected, and order change can be performed without the web being separated at the front and back.

However, in the case of the above method, FIG.
As shown in, when the M line is largely shifted before and after the order change and the cutting width is relatively narrow, the rear end of the cutting web 5c and the front end of 5f are completely separated and become free. Check the occurrence of troubles due to uncoupling.

Therefore, as shown in FIG. 13, a special cutting device 4 is used.
A means has been proposed in which the webs continuously flow on both the upper and lower stages by installing the order change area as shown in FIG. 16 and separating only the boundary between the upper side and the lower side. FIG.
4 to 15 show the structure of the cutting device 4 in such a means.

14 to 15, a cutting nozzle 39 such as a water jet travels across the corrugated cardboard web 3 by the endless chain 15, and as a result, FIG.
The N portion of is cut. In the above means, the frame 7 is tilted about the frame 6 for the purpose of adjusting the length of the order change area.

However, in such a means, the ability of the non-directional cutting device such as the water jet 39 or the laser cutting machine, that is, the cutting device capable of moving in any direction with respect to the flow of fluid or light, is maximized. The method of withdrawal is not considered.

[0020]

[Problems to be Solved by the Invention] In recent years, the order change speed of a corrugated machine has become even higher, and the speed of the seat is about 350 m / min, which will be further increased in the future. There is a tendency.

On the other hand, the cutting ability of the corrugated paper sheet by the water jet 39 as described above, for example, depends on various conditions, but is currently limited to about 400 m / min. Under this condition, when the water jet cutting nozzle 39 is simply moved to the side of the web 3 to cut a corrugated cardboard web having a width of 1 m, an order change area of about 1.8 m is required.

As described above, the order change area is not a final product as a corrugated board sheet, and is therefore discarded as a defective sheet. Therefore, the order change area of 1.8 m as described above has a length that reduces the production efficiency, and it is strongly required to shorten the order change area.

The object of the present invention is to shorten the length of the order change area as much as possible under the cutting ability of the current non-directional cutting device, and to obtain a cutting shape with less jamming. An object is to provide a compact order change device and a cutting device with simplified functions.

[0024]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and the gist of the invention is to provide a slitter scorer device for slitting a corrugated board web into a plurality of slits parallel to the traveling direction thereof. Arranged on the downstream side of the slitter scorer device, and provided with a plurality of cut-off devices for cutting and separating each of the above-mentioned webs that are branched and introduced at a predetermined number of slits at right angles to the traveling direction of the web,
At the time of order change, an uncut portion is provided between the leading edge of the new order web and the trailing edge of the old order web to prevent slitting, and the boundary of the old order branched on the downstream side of the slitter koala device. In the order change device of the corrugating machine that separates the vicinity of the rear end of the line slit line and the vicinity of the tip of the boundary slit line of the new order, the frame installed rotatably around the spindle and the same frame An attached non-directional cutting device, a cutting machine running device for running the cutting device on the frame, and moving means for moving the frame at an angle set in advance with respect to the running direction of the web. An order change device for a corrugated machine, which is characterized by having and.

According to the above means, a non-directional cutting device such as a water jet or a laser cutting machine is caused to travel while being inclined at a constant angle with respect to a reference line perpendicular to the traveling direction of the web.

The direction of this running angle is such that the flow direction partial velocity of the cutting device matches the flow direction of the sheet (web). By operating in this way, the relative speed between the cutting device and the web can be reduced, and operation can be performed to maximize the capacity of the cutting device.
As a result, the length of the order change area can be shortened.

Further, in the above-mentioned means, it is also one of the concrete means of the present invention that the rotation center of the frame is provided on the substantially center line of the machine.

Normally, the position of the boundary slit of the web is near the center of the machine, but since the frame is configured to rotate about the center of the machine as described above, the amount of deflection of the cutting device when the frame rotates. Therefore, the amount of correction of the control position can be small. Also, when tilting both around the center of the frame, the installation space required for this is conventional (rotating around one side of the frame)
It takes about half of that.

More preferably, the angle of the boundary slit line with respect to the web running direction is 30 ° to 6 °.
Configure to 0 °.

Generally, in order to shorten the order change area,
When the tip of the web is approached at a right angle to the flow direction, the end on the side that is not connected becomes unstable in running and jamming is likely to occur, but according to the above means, the boundary slit line does not move in the web running direction. Since the angle of 30 ° to 60 ° is provided, the jamming up can be prevented by the relief effect by the inclination angle.

The cutting device for the corrugated machine is constructed as follows. That is, two non-directional cutting devices mounted on a frame rotatably installed around a spindle and an endless chain or the like that allows the cutting devices to travel on the frame over the entire width of the web. An endless track traveling device and a moving means for moving and setting the frame at a preset angle with respect to the traveling direction of the web are provided, and the endless track traveling device is parallel to each other and at the opposite direction at least in a cutting range. The cutting devices are disposed so as to oppose each other so as to travel, and the cutting devices are provided on opposite sides of the traveling device.

Further, in the cutting device, specifically, a trim cutting device is provided in which the center of rotation of the frame is provided substantially on the center line of the machine, a defect removing portion is additionally provided, and a cut is made only in the trim portion.

According to the cutting device according to the above means, since the nondirectional cutting device is used, the cutting direction by the cutting device can be freely set, and it becomes possible to cut the full width with a short cutting length, and the function of the rotary machine. Can have As a result, the rotary shear can be omitted, and a cutting device having only the function of trim cutting will suffice and the product cost can be reduced.

[0034]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view (a view taken in the direction of arrow A in FIG. 2) of the corrugating machine cutting apparatus according to the first embodiment of the present invention, and FIG. 2 is a front view thereof.

1 and 2, reference numeral 7 denotes a pair of frames slidably supported on the raceway surface 20, and the left and right frames 7, 7 are connected by an upper beam 8 and a lower beam 12. A traveling wheel 18 rotated by a motor 16 is attached to a lower end of the frame 7. A fulcrum shaft 19 is provided at the center of the lower beam 12, and the fulcrum shaft 19 is rotatably supported by a bearing 11 on the ground. Therefore, when the motor 16 rotates, the frame 7 and the beams 8 and 12 on both sides integrally rotate about the fulcrum shaft 19.

The upper beam 8 has sprockets 9 and 10 attached thereto.
Is attached, and an endless chain 15 is hung on the sprockets 9 and 10. Endless chain 15
A cutting nozzle 39 of a water jet cutting device is attached to. The upper sprocket 9 is directly connected to the motor 17, and one sprocket 10 is freely rotating. Therefore, when the motor 17 is rotationally driven, the cutting nozzle 39 is caused to travel along the upper beam 8.

Reference numeral 41 denotes an arithmetic unit. The arithmetic unit 41 is inputted with data such as web speed at the time of order change, cutting start position and end position by the cutting nozzle 39, and order change area set length, and the like. The optimum traveling angle and traveling speed are calculated and a drive command is output to the motors 16 and 17.

Next, the operation of the cutting device shown in FIGS. 1 and 2 will be described with reference to an embodiment. FIG. 3 (a) shows how the cutting lines are cut when the web is cut by the water jet cutting nozzle 39, and FIG. 3 (b) shows various cutting conditions described below. The order change area lengths of are shown together.

The cutting points and the like of the cutting device in this embodiment are as follows.

Web speed at the time of order change 350 m / min Maximum cutting speed of water jet 400 m / min Cutting width (measured at right angles to the web advancing direction) 1 m (1) First, as a first example, the cutting nozzle 39 is a corrugated cardboard web. A description will be given of the case of moving to the right in FIG. In FIG. 3, the origin is O and the velocity vector OA of the web is upwards,
When the traveling speed vector OB of the cutting nozzle 39 is taken to the right, AB is the relative speed between the cutting nozzle 39 and the web, so this should not exceed the maximum cutting speed of 400 m. The moving speed of the cutting nozzle 39 is limited by such conditions, and when calculated based on the above, the moving speed is 193 m / min. In addition, the angle of the cutting line at this time is 29 °, and if the web is cut to a width of 1 m, the length of the order change area becomes 1.8 m as shown in FIG. 3B.

(2) Next, as a second example, the cutting nozzle 39
Tilt the running direction of
The traveling speed of the disconnecting nozzle 39 is still 193 m / min.
The case will be explained. At this time, the speed of the cutting nozzle 39
The degree vector is O in FIG. _.B₁Can be drawn like
A. B₁Is the relative speed between the cutting nozzle 39 and the web.
You. When these numerical values are calculated, the relative speed (A.B.
₁) Is 337 m / min, and the cutting line angle θ₁Is 32.7 °
Becomes If this is used as a base, when the cutting width is 1 m,
The changer length is 1.6m as shown in Fig. 3 (b).
You. In this way, the traveling direction of the cutting nozzle 39 is set to the web 3 direction.
By changing the length of the order change range
The length can be shortened.

(3) Relative velocity in the case of (2) above
Was 337 m / min, which is the highest of the cutting equipment.
Cutting speed lower than 400 m / min. That is, in (2) above
In some cases, increase the traveling speed of the cutting nozzle 39.
It means that you may ask. Find this amount of speed increase
In order to do so, in FIG. B₁An extension of
Centered around A, the maximum cutting speed 400m / min equivalent radius A
Intersection B of the circle drawn in B _Two, The O. B_TwoIs disconnected
The relative speed between the cheat 39 and the web is 400m above the maximum value.
/ Min, which corresponds to the traveling speed_TwoIs the cutting line of web 3
Angle.

When these numerical values are calculated, the cutting nozzle 3
The traveling speed of No. 9 was 347 m / min and the inclination θ ₂ = 54.7 °, and the length of the order change area at this time was 0.7 m (see FIG. 3).
(See (b)). From this, the order change region length can be shortened by inclining the traveling direction to the traveling direction of the web as in the case of (2) above, but by further controlling the traveling speed of the cutting nozzle 39, the cutting device Even if the ability of is limited to a certain value or less, the order change area length can be greatly shortened by improving the operating method.

(4) In the examples of (2) and (3) above, the traveling angle of the cutting nozzle 39 was initially set to θ = 20 °.
In the actual operation of the corrugated machine, it is necessary to control the length of the order change area to a constant allowable value. In this case, the traveling speed and traveling angle θ of the cutting nozzle can be calculated by obtaining the angle of the cutting line from the cutting width and the allowable order change area length and plotting as shown in FIG.

In FIG. 1, the cutting nozzle 39 is tilted both upward and downward to the right only when the direction of the cutting line is downward and downward as shown in FIG. This is because, depending on the sheet (web) size before and after the order change, it is necessary to cut upward to the right. In order to cut the cutting line of the sheet 3 so as to rise to the right, the traveling line of the cutting nozzle 39 in FIG. 1 is tilted by tilting the frame 7 so that the cutting nozzle 39 runs from left to right. It

In the conventional example shown in FIGS. 14 to 15,
While the frame 6 on one side is the center of rotation, in this embodiment, the frame 7 is configured to rotate about the center of the machine (which is also the center of the corrugated board web).
As shown in FIGS. 6 (a) and 6 (b), although the conventional one is inclined by α ° about one side, the conventional one occupies a space of 2 m in total in the flow direction.
When rotated around the machine center as in this embodiment, half
m is enough. This reduces the installation length of the corrugated machine.

Further, since the cutting line M usually has the highest frequency near the central portion of the machine, if the central portion of the machine is set as the center of frame rotation, even if the inclination of the frame changes,
The positional deviation of the cutting nozzle 39 near the central portion in the flow direction is reduced. Therefore, the cutting start position in the flow direction of the web 3 becomes more accurate.

To shorten the length of the order change area,
It is natural that the angle θ of the cutting line should be close to the right angle to the flow direction of the web, but on the other hand, as shown in FIG. 5 (a), the corner portion indicated by Z has its own weight or air when traveling. Jam-up is likely to occur because the flow causes shake and becomes unstable. When the angle θ is reduced, the running stability is increased, but the length of the order change region is increased and the loss portion is increased. Therefore, the angle of the cutting line is approximately 30 ° to 60 ° as shown in FIG. 5B.
Is preferred.

FIG. 4 is a front view of a corrugating machine according to the second embodiment of the present invention. The frame structure and the like in this embodiment are the same as those in the first embodiment shown in FIGS. 1 and 2. In FIG. 4, the endless chain 15 has opposed portions 15a and 15b which run in parallel and in opposite directions over at least the width of the corrugated board web 3.
Are stretched to form. Cutting nozzles 39a and 39b are attached to the opposite sides of the endless chain 15, respectively.

With this arrangement, when the cutting nozzle 39a moves while cutting from left to right, one cutting nozzle 39b moves from the right to the opposite, and the cutting nozzle 39a reaches the right end. At this time, the nozzle 39b comes to the original position of the left end 39a. Next, endless chain 15
, The nozzle 39b will now run from left to right. In this way, by switching the cutting nozzles that blow out the jets one after another, it is possible to perform cutting one after another in the same direction repeatedly without spending time to return the nozzles as in the case of one cutting nozzle. it can.

With the above-mentioned structure, the defective portion sheet, which has been separated by continuously rotating the rotary shaft a plurality of times, can be cut short in the flow direction even at high speed.

FIG. 7 is a layout view of the order change device of the corrugated machine according to the third embodiment of the present invention. In this embodiment, a defect removing device 42 and a trimming device dedicated cutting device 43 are additionally provided to the cutting device 4 in the second embodiment. In the conventional rotary machine 2, it is necessary to cut the full width corrugated board web in order to remove the defective sheet, and therefore the knife cylinder 25 and the anvil cylinder 26 have to use a considerably thick member in order to obtain high rigidity. There wasn't. However, by configuring as in the first and second embodiments, the non-directional cutting device is sufficiently short, and the cutting device according to the first embodiment maximizes the ability of the water jet cutting machine to obtain a right angle. Since it is possible to cut the web close to the above, the full width cutting which is conventionally provided in the rotary 2 can be performed by the device of the second embodiment. Therefore, a cutting device 43 that only cuts the trim may be placed at a position corresponding to the conventional rotary 2.

Normally, in the corrugating machine, the width of the corrugated board web 5 is from the maximum width to about ½ of the maximum width. Then, the trim cutting only needs to have the ability to cut about 1/4 of the maximum width at each end of the corrugated board web, and it is not necessary to cut the central part that affects the bending most, so the rigidity is smaller than the conventional one. Since it is good, the device is downsized and the cost is low.

[0055]

The present invention is configured as described above.
According to the present invention, a non-directional cutting device is mounted on a rotatable frame so that it can travel on the frame, and the frame is moved and set at a predetermined angle with respect to the traveling direction of the web. Since the direction of the speed of movement of the cutting device in the sheet advancing direction is the same as the direction of advancing the web, a high-speed order change is possible even under the limited cutting ability of the cutting device. On the other hand, the order change area can be shortened, the loss sheet (defective sheet) is reduced, the productivity is improved, the machine installation space is reduced, and the manufacturing cost of the apparatus is also reduced.

Further, since the length of the order changing area and the cutting angle can be freely adjusted, stable operation without jamming can be performed by controlling the cutting speed regardless of the order changing speed and the cutting width. .

[Brief description of drawings]

FIG. 1 is a plan view of a cutting device according to a first embodiment of the present invention (a view as seen from an arrow A in FIG. 2).

FIG. 2 is a front view corresponding to FIG. 1;

FIG. 3 is an explanatory diagram of how to insert a cutting line in the first embodiment.

FIG. 4 is a front view of a cutting device according to a second embodiment of the present invention.

FIG. 5 is an explanatory diagram of how to insert a cutting line in the first and second embodiments.

FIG. 6 is a comparative explanatory diagram of a defect removal function of a rotary machine.

FIG. 7 is a layout view of a corrugating machine according to a third embodiment of the present invention.

FIG. 8 is a layout view of a conventional corrugating machine.

FIG. 9 is an explanatory view (1) of how to make a conventional break.

FIG. 10 is an explanatory diagram of a conventional method of making a break (part 2).

FIG. 11 is an explanatory view of another conventional method of making a break.

FIG. 12 is an explanatory diagram of a problem showing how to make a conventional break.

FIG. 13 is a layout view of another conventional corrugating machine.

FIG. 14 is a plan view of another conventional cutting device.

FIG. 15 is a front view corresponding to FIG.

FIG. 16 is an explanatory view of how to make a break by another conventional cutting device.

[Explanation of symbols]

 1a, 1b Slitter scorer 2 Rotary shear 3 Corrugated cardboard web 4 Cutting device 5 Cutting web 7 Frame 9 Sprocket (drive) 10 Sprocket (driven) 11 Bearing 15 Endless chain 16 Motor (for frame rotation) 17 Motor (for cutting nozzle movement) 19 Fulcrum shaft 21 angle detection means 22, 22a, 22b cut-off 23 trim 30 trim duct 39 cutting nozzle 41 calculator 42 defect removing device 43 trimming device

Claims (6)

[Claims] 1. A slitter scorer device for slitting a corrugated board web into a plurality of slits parallel to the traveling direction thereof,
And a plurality of cut-off devices arranged downstream of the slitter scorer device, each of which is branched into a predetermined number of slits and is introduced into the slitter scorer device at a right angle to the running direction of the web. When an order is changed, an uncut portion is provided between the leading end of the new order web and the trailing end of the old order web, and the uncut portion is provided so that the slitter scorer device branches downstream of the old order. In the order change device of the corrugating machine that separates the vicinity of the rear end of the boundary slit line and the vicinity of the leading end of the boundary slit line of the new order, a frame rotatably installed around the spindle,
A non-directional cutting device attached to the frame, a cutting machine running device for running the cutting device on the frame, and moving the frame while tilting the frame at a preset angle with respect to the running direction of the web. An order change device for a corrugated machine, which is provided with a moving means for urging. 2. The order change device for a corrugated machine according to claim 1, wherein the center of rotation of the frame is provided substantially on the center line of the machine. 3. The order change device for a corrugated machine according to claim 1, wherein an angle of the boundary slit line with respect to the web traveling direction is 30 ° to 60 °. 4. A corrugating machine cutting device for cutting a corrugated board web over its entire width. A frame installed rotatably around a spindle and two non-directional cutting devices mounted on the frame. And an endless chain traveling device such as an endless chain that causes the respective cutting devices to travel over the entire width of the web on the frame, and the frame is moved and set to a preset angle with respect to the traveling direction of the web. Moving means, the endless track traveling device is arranged opposite to each other so as to travel in parallel and in opposite directions at least in the cutting range, and the cutting device is provided on opposite sides of the traveling device. A cutting device. 5. The cutting device according to claim 4, wherein a rotation center of the frame is provided on a substantially center line of a machine. 6. An order change device for a corrugated machine, comprising the cutting device according to claim 4 additionally provided with a defect removing part, and a trim cutting device for making a cut only in the cutting device and the trim part.