JP2007152691A - Corrugating machine and production control device used in the machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugating machine which can surely and continuously produce many orders of different kinds including a short production length. <P>SOLUTION: The corrugating machine is equipped with a rotary shaft 13, a slitter scorer 15, a cut-off device 17, an order change control part which controls at least these order change actions, and a production control device 21 which controls the actions of a whole apparatus. The order change control part has an order change point setting part 87 calculating order change points, an order change point pursuing part 89 separately pursuing the positions in the conveyance direction of a plurality of the order change points X introduced from the order change point setting part 87, and an order change judgment indication part 91 which judges the positions of the order change points X and dispatches an order change command signal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a corrugating machine and a production management apparatus used therefor.

In the corrugating machine, a back liner is bonded to a core cored in a wavy shape with a single facer to form a single-sided cardboard, and a liner is bonded to the single-sided cardboard with a double facer to form a double-sided cardboard.
After the double facer passes through the double facer, a slit or ruled line is made in the conveying direction by a slitter scorer, and then cut in the width direction by a cutoff device to form a cardboard sheet, which is stacked on a stacker and sequentially discharged.
The back liner, core and front liner base papers are supplied by rewinding the roll paper, and when one roll paper is used up, it is continuously supplied by splicing to another roll paper. .

Depending on the user's order, the production length per order varies from several pick-up meters to several thousand meters, and the type (size, paper quality) of the corrugated cardboard sheet is different for each order. For this reason, corrugator machines continuously produce several hundreds of different orders of corrugated sheet per day.
The predetermined length and the required number of cardboard sheets to be produced are set in advance in the production management device for each order, and the operation of each part is managed (controlled) so that the production management device produces cardboard sheets corresponding to each order. ing.

When only the dimensions of the cardboard sheet are changed by changing the order, the processing position such as slits in the slitter scorer and the rotation speed (cutting length) of the cutoff device are changed. This is called dry-end order change. .
In the case of this dry-end order change, as shown in Patent Document 1, a rotary shearer can reliably process the trim formed at both ends of the double-sided cardboard as the slit position of the slitter scorer is changed. At the order change position, at least both ends thereof are cut in the width direction.

Japanese Patent Laid-Open No. 6-210772

By the way, in recent years, a situation has arisen in which a user is required to have a shorter production length, for example, several meters.
Conventional ones including those disclosed in Patent Document 1 have been difficult to continuously produce multi-order corrugated cardboard sheets including orders of such a short production length.

  In view of the above problems, an object of the present invention is to provide a production management device that can reliably and continuously produce different types of multiple orders including a short production length, and a corrugating machine using the same.

In order to solve the above problems, the present invention employs the following means.
That is, the corrugating machine according to the present invention includes a rotary shaft that cuts at least both end portions of a cardboard that is continuously transported in a direction substantially perpendicular to the transport direction, and slits and ruled lines along the transport direction on the cardboard. A slitter scorer to be processed, a cut-off device that cuts the corrugated cardboard in a direction substantially perpendicular to the conveying direction thereof to form a corrugated cardboard sheet, and at least the order change operation of the rotary shear, the slitter scorer, and the cut-off device is controlled. A corrugating machine having an order change control unit and controlling the operation of the entire apparatus, wherein the order change control unit includes an order change point setting unit for calculating an order change point; Transporting a plurality of order change points introduced from the order change point setting unit An order change point tracking unit for separately tracking the position in the direction, and determining whether the position of each of the order change points to be tracked has reached the order change position of the rotary, the slitter scorer, and the cutoff device, respectively. And a determination instruction unit that transmits an order change command signal.

According to the present invention, the order change point tracking unit introduces each time the order change point is calculated by the order change point setting unit, and tracks the positions of the plurality of order change points in the transport direction in parallel.
Then, the determination instructing unit determines whether the position of each order change point being tracked has reached each order change position of the rotary, slitter scorer, and cut-off device, and transmits an order change command signal. The order of the slitter scorer and the cut-off device is changed.

In this way, a plurality of order change points are tracked in parallel, and when each reaches a predetermined position, the rotary, slitter scorer, and cut-off device are reordered. It is possible to eliminate the distance required for the operation.
Therefore, since it is only limited by the time (set time) required for order change preparation of the rotary shaft, slitter scorer and cut-off device, a short (for example, several m) production order is adjusted by adjusting the cardboard conveyance speed. Even in the case of interposing, it is possible to cope with order change and to continuously produce various orders of cardboard sheets.
The setting time of the slitter scorer which requires the most time is several seconds or less in the latest one. For example, if it is 2 seconds, the order can be changed at 6 m if the conveyance speed of the cardboard is 180 m / min.

  Further, in the corrugating machine according to the present invention, the order change point setting unit calculates the order change points after the current order including a length of a defective portion existing between the orders. .

In this way, the order replacement point setting unit calculates the order replacement points after the current order including the length of the defective portion existing between the orders, so the cardboard sheet produced as a product in each order The number of sheets can be ensured reliably and accurately.
For this reason, it is possible to prevent waste caused by insufficient or excessive production of cardboard sheets.

  The production management device according to the present invention processes a rotary shaft that cuts at least both end portions of a continuously conveyed cardboard in a direction substantially perpendicular to the conveyance direction, and processes slits and ruled lines along the conveyance direction on the cardboard. A production management device that controls the operation of a corrugating machine, and a cut-off device that cuts the corrugated cardboard in a direction substantially perpendicular to the conveying direction thereof to form a corrugated cardboard sheet. An order change point setting unit, an order change point tracking unit for separately tracking the positions of the plurality of order change points introduced from the order change point setting unit in the transport direction, and each order change point to be tracked Of the rotary shaft, the slitter scorer and the cutoff device, respectively. A determination instructing section which transmits the order rewriting command signal determines whether the reached the order replacement position, characterized in that is provided.

According to the present invention, the order change point tracking unit introduces each time the order change point is calculated by the order change point setting unit, and tracks the positions of the plurality of order change points in the transport direction in parallel.
Then, the determination instructing unit determines whether the position of each order change point being tracked has reached each order change position of the rotary, slitter scorer, and cut-off device, and transmits an order change command signal. The order of the slitter scorer and the cut-off device is changed.

In this way, a plurality of order change points are tracked in parallel, and when each reaches a predetermined position, the rotary, slitter scorer, and cut-off device are reordered. It is possible to eliminate the distance required for the operation.
Therefore, since it is only limited by the time required for the order change of the rotary shaft, slitter scorer and cut-off device, even when a short production order (for example, several meters) is interposed by adjusting the conveyance speed. Therefore, it is possible to respond to order changes, and it is possible to continuously produce cardboard sheets of various orders.
The setting time of the slitter scorer which requires the most time is several seconds or less in the latest one. For example, if it is 2 seconds, the order can be changed at 6 m if the conveyance speed of the cardboard is 180 m / min.

  The production management device according to the present invention is characterized in that the order change point setting unit calculates the order change points after the current order including a length of a defective portion existing between the orders. To do.

In this way, the order replacement point setting unit calculates the order replacement points after the current order including the length of the defective portion existing between the orders, so the cardboard sheet produced as a product in each order The number of sheets can be ensured reliably and accurately.
For this reason, it is possible to prevent waste caused by insufficient or excessive production of cardboard sheets.

  According to the present invention, the order replacement point tracking unit introduces it every time the order replacement point is calculated by the order replacement point setting unit, and tracks the positions of the plurality of order replacement points in the transport direction in parallel. Even when a short production order (for example, several meters) is interposed, it is possible to respond to the order change and it is possible to continuously produce multi-order cardboard sheets.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In this embodiment, the present invention is applied to a corrugating machine 1 for producing double-sided cardboard sheets for producing double-sided cardboard sheets.
FIG. 1 is a schematic configuration diagram showing a corrugating machine 1.
The corrugating machine 1 includes a mill roll stand 3, a single facer 5, a bridge unit 7, a glue machine 9, a double facer 11, a rotary shear 13, a slitter scorer 15, a cut-off 17, and a stacker 19. A production management device 21 is provided.
These devices are installed on the same floor surface FL.

The mill roll stand 3 is configured such that roll papers 23 each having a base paper wound in a roll shape are mounted on both sides in the front-rear direction.
On the upper part of the mill roll stand 3, a splicer 25 for performing paper splicing is provided.
When paper is fed from one paper roll 23, the other paper roll 23 is mounted and paper splicing preparation is made. When the remaining base paper on one paper roll 23 is reduced, the splicer 25 joins the base paper on the other paper roll 23. Then, while the base paper is being supplied from the other paper roll 23, one of the paper rolls 23 is mounted to prepare for paper splicing.
In this way, the base paper is sequentially spliced and continuously fed out from the mill roll stand 3 toward the downstream side.

Each base paper is called a back liner, a core, and a front liner depending on the application.
The mill roll stand 3 includes a back liner mill roll stand 3a, a center core mill load stand 3b, and a front liner mill load stand 3c according to the purpose of the paper to be supplied.
The back liner mill roll stand 3 a supplies the back liner 27 to the single facer 5.
The center core mill load stand 3 b supplies a center core 29 that is stepped to the single facer 5.
The front liner mill roll stand 3 c supplies the front liner 31 to the double facer 11.

The single facer 5 is provided with an upper roll 33, a lower roll 35, a gluing device 37, and a pressure belt 39.
Concave portions and convex portions extending in the axial direction are alternately formed on the peripheral surfaces of the upper roll 33 and the lower roll 35.
The upper roll 33 and the lower roll 35 are installed so that the concave portions and the convex portions thereof mesh with each other, and the middle core 29 supplied between the two from the middle mill load stand 3b at both meshing portions. It is comprised so that it may process in a wavy shape.

The gluing device 37 is installed on the peripheral surface of the upper roll 33 on the downstream side in the rotation direction of the meshing portion of the upper roll 33 and the lower roll 35, and has a function of gluing the top of the core 29.
The pressure belt 39 is installed above the upper roll 33 and is provided so as to be in contact with and away from the upper roll 33.
The pressure belt 39 presses the back liner 27 supplied from the back liner mill roll stand 3 a against the wave-processed core 29 carried along the peripheral surface of the upper roll 33, and bonds them to a single-sided cardboard. 41 is formed.
The single-sided cardboard 41 has a shape in which stepped mountains 42 extending in the width direction are arranged in parallel on one side of the back liner 25 in the transport direction.

A take-up conveyor 43 is installed obliquely above the single facer 5 on the downstream side in the conveying direction. The take-up conveyor 43 is composed of a pair of endless belts and has a function of sandwiching the single-sided cardboard 41 formed in the single facer 5 and transporting it to the bridge unit 7.
The bridge portion 7 temporarily retains the single-sided cardboard 41 in order to absorb the speed difference between the single facer 5 and the devices following the double facer 11.
The glue machine 9 is interposed between the bridge portion 7 and the duffel facer 11, and is provided with a gluing device 45 that glues the top of the corrugated mountain 42 of the single-sided cardboard 41.

The double facer 11 is formed by bonding a single-sided cardboard 41 and a front liner 31 to form a double-sided cardboard (cardboard) 47.
The double facer 11 includes a hot plate 49, a weight roll 51, an upper conveyor 53, and a lower conveyor 55.
The hot plate 49 is a metal hollow box, and the upper surface is maintained at a high temperature by an internal heating source.
A plurality of the hot plates 49 are juxtaposed in the conveying direction of the double-sided cardboard 47, and their upper surfaces are configured to guide and heat the lower surface of the double-sided cardboard 47.

The weight roll 51 is installed above the hot plate 49 so that the axis is orthogonal to the transport direction.
A plurality of weight rolls 51 are juxtaposed in the conveying direction of the double-sided cardboard 47 and presses the double-sided cardboard 47 toward the hot plate 49 from above.
The upper conveyor 53 and the lower conveyor 55 convey the double-sided cardboard 47 from above and below.

The rotary shaft 13 is installed on the downstream side of the double facer 11 and cuts the double-sided cardboard 47 in the width direction in full width or partially when changing the order.
The rotary shaft 13 includes, for example, a knife cylinder 57 and an anvil cylinder 59 that are arranged opposite to each other with their axes extending in the width direction.
The peripheral surface of the knife cylinder 57 is provided with a knife extending in the width direction.
The anvil cylinder 59 receives the knife of the knife cylinder 57. For example, the receiving part of the knife is divided in the axial direction so that a portion required for cutting can be selectively engaged with the knife. .
An RS measuring wheel 81 that measures the amount of movement of the double-sided cardboard 47 is provided in the upstream side portion of the rotary 13. (See Figure 2)

The slitter scorer 15 cuts a wide double-sided cardboard 47 so as to have a predetermined width in the transport direction, and processes a ruled line extending in the transport direction.
The slitter scorer 15 includes a first slitter scorer unit 15a and a second slitter scorer unit 15b arranged along the conveying direction of the double-sided cardboard 47.
Since the first slitter scorer unit 15a and the second slitter scorer unit 15b are configured similarly, the same members are distinguished by adding suffixes “a” and “b” after the reference numerals. In the following description, when distinguishing the first slitter scorer unit 15a and the second slitter scorer unit 15b, a and b are added after the reference, but a and b are omitted unless otherwise distinguished. And each part and member shall be shown only by a code.

.
One of the first slitter scorer unit 15a and the second slitter scorer unit 15b is in operation, and the other is configured to perform preparatory work such as setting change for order change. FIG. 1 shows a state in which the second slitter scorer unit 15b is operating.
In the first slitter scorer unit 15a and the second slitter scorer unit 15b, a plurality of sets of upper ruled line rolls 61 and lower ruled line rolls 63 arranged opposite to each other with the double-sided cardboard 47 interposed therebetween on the upstream side in the conveying direction are set in the width direction. Is provided. The upper ruled line roll 61 and the lower ruled line roll 63 are configured to be movable in the width direction and the vertical direction, respectively.

A convex portion that is continuous in the circumferential direction is formed at a substantially central portion of the circumferential surface of the upper ruled line roll 61. A concave portion that is continuous in the circumferential direction is formed at a substantially central portion of the circumferential surface of the lower ruled line roll 63.
On the downstream side of the upper ruled line roll 61 and the lower ruled line roll 63, a plurality of sets of upper slitter knives 65 and lower slitter knives 67 that are arranged to face each other with the double-sided cardboard 47 interposed therebetween are provided in the width direction. The upper slitter knife 65 and the lower slitter knife 67 are movable in the width direction and the vertical direction, respectively.
The upper slitter knife 65 and the lower slitter knife 67 are each a disc-shaped blade having a sharp outer periphery, and is configured to be rotated at a high speed.
On the downstream side of the slitter scorer 15, a trim shooter 83 that discharges the trim 113 existing at both ends of the double-sided cardboard 47 downward is provided. (See Figure 2)

The cut-off device 17 cuts the double-sided cardboard 47 cut in the transport direction by the slitter scorer 15 in the width direction to form a plate-like cardboard sheet 71.
The cut-off device 17 is provided with an upper knife cylinder 68 and a lower knife cylinder 69 which are arranged to face each other with the double-sided cardboard 47 interposed therebetween and are rotated in opposite directions.
A knife 70 extending in the width direction is provided on the peripheral surface of the upper knife cylinder 68, and a knife 72 extending in the width direction is provided on the peripheral surface of the lower knife cylinder 69. (See Figure 2)
When the upper knife cylinder 68 and the lower knife cylinder 69 are rotated and the knives 70 and 72 are engaged with each other, the double-sided cardboard 47 is configured to be cut in the width direction.

On the downstream side of the cut-off device 17, it swings in the vertical direction with the downstream side as a fulcrum, protrudes to the conveyance path of the corrugated cardboard sheet 71 when moving upward, and, for example, a conveyance path switching member 75 that guides the defective cardboard sheet 77 downward. Is provided.
Below the transport path switching member 75, a box 79 for storing the defective cardboard sheet 77 is installed.
A CO measuring wheel 85 that measures the amount of movement of the double-sided cardboard 47 is provided upstream of the cutoff device 17. (See Figure 2)

The stacker 19 stacks the corrugated cardboard sheets 71 conveyed by the conveyance conveyor 73 and discharges them as products to the outside of the machine.
The production management device 21 controls each part of the corrugating machine 1 in order to perform production quantity management for producing the production quantity according to the order, order change corresponding to the order change, and quality management.
Various parts of the corrugating machine 1 are provided with various sensors in order to provide the production management apparatus 21 with information such as production status.

The production management device 21 includes an order change point setting unit 87, an order change point tracking unit 89, an order change determination instruction unit (determination instruction unit) 91, and an operation control unit 93.
These order change point setting unit 87, order change point tracking unit 89, order change determination instruction unit 91, and operation control unit 93 constitute an order change control unit of the present invention.
The order change point setting unit 87 sets an order change point when the order change position of each order on the double-faced cardboard 47 reaches the exit of the double facer 11.

The order replacement point tracking unit 89 includes a plurality of, for example, three position tracking circuits 95a, 95b, and 95c.
The position tracking circuits 95a, 95b, and 95c are configured to sequentially introduce the order replacement positions set by the order replacement point calculation unit 87 and track their current positions.

The order change determination instruction unit 91 includes an RS determination unit 97, an SS determination unit 99, a CO determination unit 101, and an ST determination unit 103.
In addition, although the RS determination unit 97, the SS determination unit 99, the CO determination unit 101, and the ST determination unit 103 are illustrated separately for convenience of explanation, they may be configured integrally or may be configured separately. .
The RS determination unit 97 mainly includes an order change operation position (hereinafter referred to as an RR position) of the rotary 13 that is determined according to the conveyance speed of the double-sided cardboard 47, and orders introduced from the position tracking circuits 95a, 95b, and 95c. The current position of the replacement point is compared, and if both match, an RS disconnection command signal is transmitted.
The SS determination unit 99 mainly includes an order change operation position (hereinafter referred to as an SS position) of the slitter scorer 13 determined according to the conveyance speed of the double-sided cardboard 47, and orders introduced from the position tracking circuits 95a, 95b, and 95c. The current position of the replacement point is compared, and if both match, an SS shaft lift command signal is transmitted.

The CO determination unit 101 is introduced mainly from an order change operation position (hereinafter referred to as a CO position) of the cut-off device 17 that is determined according to the conveyance speed of the double-sided cardboard 47, and position tracking circuits 95a, 95b, and 95c. The current position of the order change point is compared, and if they match, a cutting length switching command signal is transmitted.
The RS determination unit 97 compares the stacking plate changing operation position (hereinafter referred to as ST position) in the stacker 19 with the current position of the order changing point introduced from each of the position tracking circuits 95a, 95b, and 95c. When they match, an ST replacement command signal is transmitted.

The operation controller 93 includes an RS operation controller 105 that controls the operation of the rotary 13, an SS operation controller 107 that controls the operation of the slitter scorer 15, and a CO operation controller that controls the operation of the cutoff device 17. 109 and an ST operation control unit 111 that controls the operation of the stacker 19.
The RS operation control unit 105, the SS operation control unit 107, the CO operation control unit 109, and the ST operation control unit 111 are illustrated separately for convenience of explanation. May be.

The operation of the corrugating machine 1 according to this embodiment described above will be described.
First, the manufacturing operation of the cardboard sheet 71 will be described with reference to FIG.
The center core 29 is supplied between the upper roll 33 and the lower roll 35 of the single facer 5 from the mill roll stand 3b for the center core.
The back liner 27 is supplied from the back liner mill roll stand 3 a between the upper roll 33 and the pressure belt 39.
The supplied core 29 is stepped into a wave shape at the meshing portion between the upper roll 33 and the lower roll 35.
The corrugated core 29 is glued to the top of the step by the gluing device 37 while being conveyed along the peripheral surface of the upper roll 33.

When the center core 29 conveyed in this state reaches the engaging portion with the pressure belt 39, the pressure belt 39 presses the back liner 27 toward the center core 29, and the step top portion of the center core 29 and the back liner 27 are pressed. Are laminated to form a single-sided cardboard 41.
The single-sided cardboard 41 formed in this way is picked up by the pick-up conveyor 43 and conveyed to the bridge unit 7.
The single-sided cardboard 41 is conveyed from the bridge portion 7 to the double facer 11, but since the conveyance speed to the doublefacer is lower than the conveyance speed from the single facer 5, the single-sided cardboard 41 forms a plurality of curved shapes in the bridge portion 7. Will stay.
While the single-sided cardboard 41 stays in the bridge portion 7, the glue sufficiently permeates the back liner 27 and the center core 29 and further dries, so that the single-sided cardboard 41 is firmly bonded.

The single-sided cardboard 41 supplied from the bridge unit 7 to the double facer 11 is glued to the top of the step by the gluing device 45 of the glue machine 9.
The glued single-sided cardboard 41 is bonded to the front liner 31 supplied from the front liner mill roll stand 3 c and introduced into the double facer 11.

The single-sided corrugated board 41 and the front liner 31 introduced into the double facer 11 are joined via glue attached to the step top of the core 29 and are pressed against the hot plate 49 by the weight rolls 51. It runs while sliding on 49.
At this time, the front liner 31 in contact with the hot plate 49 is heated by receiving heat from the hot plate 49, and the glue between the single-sided cardboard 41 and the front liner 31 is dried and solidified to form the double-sided cardboard 47.
Even if the double-sided cardboard 47 passes through the hot plate 49, it is sandwiched and conveyed by the upper conveyor 53 and the lower conveyor 55 for a while, and is cooled during this time.

The amount of movement of the double-sided cardboard 47 carried out from the double facer 11 is measured by the measuring wheel 81. This information is sent to the production management device 21 and used for calculating the production length and the like.
The double-sided cardboard 47 is introduced into the slitter scorer 15, and the ruled line Kb for easy folding is processed along the transport direction by the upper ruled line roll 61 b and the lower ruled line roll 63 b of the second slitter scorer unit 15 b, and then the upper slitter knife The sheet is cut (slit Sb) along the conveyance direction by 65b and the lower slitter knife 67b.
At this time, the first slitter scorer unit 15a is set in a standby state according to an instruction from the production management device 21, and the width direction positions of the upper ruled line roll 61a and the lower ruled line roll 63a, the upper slitter knife 65a, and the lower slitter knife 67a are in the next order. We are preparing to change orders such as moving to a processing position.

The double-sided cardboard 47 that has passed through the slitter scorer 15 has the trim 113 at both ends discharged by the trim shooter 83, and the product portion is introduced into the cut-off device 17.
The double-sided cardboard 47 is cut in the width direction by the knives 70 and 72 as the upper knife cylinder 68 and the lower knife cylinder 69 of the cut-off device 17 are rotated to form a cardboard sheet 71.
The cardboard sheets 71 are transported by the transport conveyor 73, stacked on the stacker 19, and discharged outside the apparatus.
On the other hand, the defective corrugated cardboard sheet including the defective portion cut by the cut-off device 17 is guided downward by the conveyance path switching member 75 swinging upward at the timing, and is accumulated in the box 79.

Next, the order change in a device after the rotary 13 (referred to as a dry end) will be described.
First, the order changing operation will be described with reference to FIGS.
Both ends of the defective portion 117 at the order change position of the double-sided cardboard 47 are cut along the cutting line D in the width direction by the rotary 13.
When the position of the cutting line D moves and enters the slitter scorer 15, in the waiting first slitter scorer unit 15a, the upper ruled line roll 61a and the lower ruled line roll 63a are moved up and down to start processing the ruled line Ka of the next order. To do.
Next, the upper slitter knife 65a and the lower slitter knife 67a are moved up and down to start processing the slit Sa of the next order.

When the double-sided cardboard 47 moves and the position of the cutting line D enters the second slitter scorer unit 15b, the upper ruled line roll 61b and the lower ruled line roll 63b move up and down in the second slitter scorer unit 15b being processed, and the ruled line Kb Stop processing.
Next, the upper slitter knife 65b and the lower slitter knife 67b move up and down to stop the processing of the slit Sb.
At this time, a portion where the slit Sa and the slit Sb overlap is formed. This overlapping portion becomes a defective portion 117 that does not become a product.
The length of the defective portion 117 (defective portion length Lw1) is calculated by the production management device 21 based on the conveyance speed of the double-sided cardboard 47 and the raising / lowering timing and raising / lowering time of the upper slitter knife 65 and the lower slitter knife 67.

Next, when the double-sided cardboard 47 moves and the position of the cutting line D enters the cutoff device 17, the cutting length of the cutoff device 17 is changed. In other words, the cutting length L1 of the current order is switched from the cutting length L1 of the current order to the defective part length Lw1, and then the cutting length L2 of the next order.
The cardboard sheets 71 of the current order are stacked on the stacker 19, and the defective cardboard sheets cut by the defective part length Lw 1 are guided downward by the conveyance path switching member 75 that swings upward at the timing, and are accumulated in the box 79. .
As a result, a gap is provided between the corrugated sheet 71 of the current order and the corrugated sheet of the next order, and the stacking position is switched in the stacker 19 during the interval.

Next, this order change control method will be described mainly with reference to FIG.
As shown in FIG. 4, an order V (current order) with a cutting length (L1) of 2 m and a number of cuts of 50 at the cut-off device 17 is processed, and then the cutting length (L2) is 1 m and the cutting is performed. Assume that an order W (next order) with six sheets and an order Z (next order) with a cutting length of 1.2 m and a cutting number of six sheets continue.

First, setting of the order change point X will be described with reference to FIG.
The position of the final cutting position ClV of the order V is grasped by the production management device 21. A position upstream of the final cutting position ClV by a predetermined distance is set as an order change position, and when this position reaches the exit of the double facer 11, the order change point setting unit 87 sets the order change point X1 and changes the order. The information is transmitted to the position tracking circuit 95a of the point tracking unit 89, for example.
Next, the order replacement point setting unit 87 sets the position of the final cutting position ClW of the order W as the position obtained by adding the defective part length Lw1 and the production length of the order W (L2 × 6) to the final cutting position ClV of the order V. calculate.

The order change point setting unit 87 sets the position upstream of the final cutting position ClW by a predetermined distance as the order change position, and when this position reaches the exit of the double facer 11, sets the order change point X2. The information is transmitted to the position tracking circuit 95b of the point tracking unit 89, for example.
The order change point setting unit 87 sequentially repeats this, sets the order change point X of each order, and transmits it to the order change point tracking unit 89 each time.

Each position tracking circuit 95 of the order replacement point tracking unit 89 tracks the movement position of the introduced order replacement point X and grasps the current position. The current position of each position tracking circuit 95 is introduced in parallel to the order change determination instruction unit 91.
The order change determination instructing unit 91 performs an order change operation as follows.
First, it is determined whether the current position of the order replacement point X1 introduced from the position tracking circuit 95a of the order replacement point tracking unit 89 to the RS determination unit 97 has reached the RS position (step S1).
If the current position of the order change point X1 has not reached the RS position (NO), step S1 is repeated.

When the current position of the order change point X1 reaches the RS position (YES), the RS determination unit 97 transmits an RS disconnection command signal to the RS operation control unit 105 of the operation control unit 93 (step S2).
The RS operation control unit 105 rotationally drives the knife cylinder 57 of the rotary 13 in accordance with the RS cutting command signal from the RS determination unit 97 to cut both ends of the double-sided cardboard 47 (cutting line D).
Next, the current position of the order replacement point X1 is introduced into the SS determination unit 99, and it is determined whether it has reached the SS position (step S3).

If the current position of the order change point X1 has not reached the SS position (NO), step S3 is repeated.
When the current position of the order change point X1 reaches the SS position (YES), the SS determination unit 99 transmits an SS shaft raising / lowering command signal to the SS operation control unit 107 of the operation control unit 93 (step S4).
The SS operation control unit 107 raises and lowers the upper ruled line roll 61 and the lower ruled line roll 63, the upper slitter knife 65, and the lower slitter knife 67 of the slitter scorer 15 according to the SS cutting command signal from the SS determining unit 99, and the ruled line position And change the cutting position.

Next, the current position of the order change point X1 is introduced into the CO determination unit 101, and it is determined whether it has reached the CO position (step S5).
If the current position of the order change point X1 has not reached the CO position (NO), step S5 is repeated.
If the current position of the order change point X1 reaches the CO position (YES), the CO determination unit 101 transmits a cutting length switching command signal to the CO operation control unit 109 of the operation control unit 93 (step S6).
The CO operation control unit 109 changes the cutting length by changing the rotation speed of the knife cylinders 68 and 69 of the cutoff device 17 in accordance with the cutting length switching command signal from the CO determination unit 101.

Next, the current position of the order change point X1 is introduced into the ST determination unit 103, and it is determined whether it has reached the ST position (step S7).
If the current position of the order change point X1 does not reach the ST position (NO), step S7 is repeated.
When the current position of the order change point X1 reaches the ST position (YES), the ST determination unit 103 transmits an ST change command signal to the ST operation control unit 111 of the operation control unit 93 (step S8).
The ST operation control unit 111 changes the stacking position of the stacker 19 in response to the ST replacement command signal from the ST determination unit 103. Note that the ST operation control unit 111 may notify the worker that the stacking position needs to be changed with sound or light.

  Order change points X1, X2, and X3 are sent in parallel from the position tracking circuits 95a, 95b, and 95c of the order change point tracking unit 89 to the order change determination instruction unit 91, and the respective order change points X1. , X2 and X3, the order change process described above is performed.

  As described above, the order change point tracking unit 89 tracks a plurality of order change points X1, X2, and X3 in parallel, and the order change determination instruction unit 91 places the order change points X1, X2, and X3 at predetermined positions. Since the order change processing of the rotary shear 13, the slitter scorer 15 and the cutoff device 17 is performed at the time of arrival, the rotary shear 13, the slitter scorer 15 and the cut are made even if the distance between the order change points X1, X2 and X3 is small. An order change can be instructed to the off device 17.

Therefore, if the rotary changer 13, the slitter scorer 15 and the cut-off device 17 are ready for order change, the order change can be performed immediately.
Since the rotary shaft 13 is only driven to rotate, and the cut-off device 17 only adjusts the rotation speed, the preparation time is almost unnecessary. Therefore, the interval required for the order change is limited by the set time of the slitter scorer 15. It is only done.
The set time of the slitter scorer 15 is less than a few seconds in the latest, for example, if it is 2 seconds, it is 10 m if the conveyance speed of double-sided cardboard is 300 m / min, 6 m if it is 180 m / min, 120 m / min. If you make a minute, you can change the order in 4m.
As described above, even when a short production order (for example, several meters) is interposed, it is possible to cope with the order change without significantly reducing the conveyance speed of the double-sided cardboard 47, and thus a short production order is interposed. Various orders of cardboard sheets can be produced continuously.
Thereby, it can respond to a user's various needs, such as being able to respond to a small order from a user.

Since the order change point setting unit 87 calculates the order change point X2 of the order W including the defective part length Lw1 existing between the current order V and the order W, the cardboard sheet produced as a product with the order V The number of 71 and the number of cardboard sheets 71 produced as products on the order W at the same time can be ensured reliably and accurately.
For this reason, it is possible to prevent waste caused by the production of the corrugated cardboard sheet 71 being less than the order or excessive.

  In addition, although this embodiment demonstrated the corrugated machine 1 which manufactures a double-sided cardboard sheet, this invention is applicable to the other corrugated machine 1, for example, the corrugated machine 1 which manufactures a double-sided cardboard sheet.

It is a front view which shows the whole schematic structure of the corrugating machine concerning one Embodiment of this invention. It is a front view which shows schematic structure of the dry end part and production management apparatus concerning one Embodiment of this invention. It is a top view which shows the processing state at the time of order change of the double-sided cardboard concerning one Embodiment of this invention. It is a top view which shows the arrangement | sequence of the order of the double-sided cardboard concerning one Embodiment of this invention. It is a flowchart which shows order change operation concerning one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Corrugating machine 13 Rotary 15 Slitter scorer 17 Cut-off device 21 Production management device 47 Double-sided cardboard 71 Corrugated sheet 87 Order change point setting part 89 Order change point tracking part 91 Order change determination instruction part

Claims (4)

A rotary that cuts at least both ends of the cardboard that is continuously conveyed in a direction substantially perpendicular to the conveyance direction;
A slitter scorer for processing slits and ruled lines along the conveying direction of the cardboard;
A cut-off device that cuts the corrugated cardboard in a direction substantially perpendicular to its conveying direction to form a corrugated cardboard sheet;
A corrugating machine comprising at least a rotary changer, a slitter scorer, and an order change control unit that controls an order change operation of the cut-off device, and a production management device that controls the operation of the entire device,
The order change control unit includes an order change point setting unit for calculating an order change point;
An order change point tracking unit for separately tracking the positions of the plurality of order change points introduced from the order change point setting unit in the conveyance direction;
A determination instructing unit that determines whether the position of each order replacement point to be tracked has reached each order replacement position of the rotary shaft, the slitter scorer, and the cutoff device, and transmits an order replacement command signal;
Corrugating machine characterized by being equipped with.   2. The corrugating machine according to claim 1, wherein the order replacement point setting unit calculates the order replacement points after the current order including a length of a defective portion existing between the orders. A rotary that cuts at least both ends of the cardboard that is continuously conveyed in a direction substantially perpendicular to the conveyance direction;
A slitter scorer for processing slits and ruled lines along the conveying direction of the cardboard;
A production management device that controls the operation of the corrugating machine, comprising a cut-off device that cuts the cardboard in a direction substantially perpendicular to the conveyance direction to form a cardboard sheet,
An order change point setting unit for calculating order change points;
An order change point tracking unit for separately tracking the positions of the plurality of order change points introduced from the order change point setting unit in the conveyance direction;
A determination instructing unit that determines whether the position of each order replacement point to be tracked has reached each order replacement position of the rotary shaft, the slitter scorer, and the cutoff device, and transmits an order replacement command signal;
A production management device comprising:   4. The production management apparatus according to claim 3, wherein the order replacement point setting unit calculates the order replacement points after the current order including a length of a defective portion existing between the orders.

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