KR20130041357A - Trim-processing method in corrugating machine, corrugating machine, and edge-cutting device - Google Patents

Abstract

In order to change the trim width of the corrugated sheet at the time of order replacement in the corrugator, an edge cutting method for performing edge cutting to separate the trim back and forth using an edge cutting device, and to trim the trim of the old order. And a second edge cutting step of edge cutting the trim of the new order at the rear of the edge cutting point of the old order trim.

Description

Trim processing method, corrugator and edge cutting device in corrugator TECHNICAL FIELD [TRIM-PROCESSING METHOD IN CORRUGATING MACHINE, CORRUGATING MACHINE, AND EDGE-CUTTING DEVICE}

The present invention relates to a method for processing a trim when an order is replaced in a corrugator and an edge cutting device for processing a trim when an order is replaced in a corrugator and a corrugator.

For example, as described in Patent Documents 1 and 2, the corrugator for producing the corrugated sheet is provided with a slitter-scorer and a cutoff device in this order downstream of the double phaser, and manufactured in the double phaser. The strip-shaped double-sided corrugated sheet is subjected to a slitting-scoring machine for a predetermined warp insertion and slitting groove processing according to the order, and then cut by the cut-off device to a predetermined length according to the order, and the product sheet. Is getting. Further, downstream of the cutoff apparatus, a defective sheet removing apparatus (not shown) for removing a defective sheet of the product sheet is equipped.

When processing with a slitter-scorer, unnecessary portions called trims (also called ears) occur on both sides of the strip-shaped double-sided corrugated sheet. The trim is cut (trimmed) by a slitter knife positioned at a position corresponding to the slitter-scorer, sent to the trim shooter, and separated from the conveying line of the product sheet sent to the cut-off device.

In addition, as the slitter-scorer, two slitter-scorers (No. 1 unit) and a second slitter-scorer (No. 2 unit) can be used to cope with order replacement without stopping the line of the machine. While it is arranged in series and one slitter scorer is being operated, the other slitter scorer is to be set according to the next order.

When this order is replaced, the trim width is also changed and the slitting position of the trim is discontinuous. At the point where this slitting becomes discontinuous, the trim and the product sheet are connected and cannot be separated. Therefore, immediately upstream of both slitter-scorers, for example, as shown in FIG. 7, the trim portion 11t of the strip-shaped double-sided corrugated sheet 11 is cut in the width direction (also referred to as edge cutting). The edge cutting apparatus 15 is arrange | positioned and at the time of order replacement, the edge cutting apparatus 15 is operated and the trim part 11t is cut | disconnected in the width direction at the place of order replacement of the strip | belt-shaped double-sided corrugated sheet 11. (The edge is cut) to separate the front and rear of the trim, so that the trim side and the product sheet side are separated.

At the time of such an order replacement, for example, as shown in FIG. 8, a production management signal is sequentially generated in the production management apparatus, and this production management signal is sent to the corrugator so that each additional operation of the corrugator (machine operation) is performed. )do. In addition, this example shows the case of order replacement from the state which uses the No. 1 unit 2A to the state which uses the No. 2 unit 2B.

That is, in the production management apparatus, when the start of the order replacement is judged, the edge cutting signal (step S30), the No. 1 unit stop signal (step S32), the No. 2 unit operation signal (step S34), and the cutter cutting dimension switching A signal (step S36) and a defect removal signal (step S38) are each generated and sent to the corrugator sequentially.

In the corrugator, in accordance with these production management signals, first, the edge cutting device 5 is operated in accordance with the edge cutting signal to cut the trimmed portion (step S41), and this edge cutting point is No. 1 unit 2A. Immediately after passing through), the No. 1 unit 2A is raised (spaced from the transfer line 10) and stopped in accordance with the No. 1 unit stop signal (step S43). In addition, immediately before the edge cutting point enters the No. 2 unit 2B, the No. 2 unit 2B is lowered (approaching the transfer line 10) in accordance with the No. 2 unit operation signal to start operation. (Step S45). Then, the rotational speed of the cutoff device 3 is changed in accordance with the product sheet length of the new order in accordance with the cutter cutting dimension switching signal (step S47). Subsequently, the product sheet corresponding to the position of the order replacement cut by the cutoff device 3 in accordance with the defect removal signal is a defective sheet, and is removed by the defective sheet removing apparatus (step S49). This completes order replacement.

According to such an order replacement process, the defective sheet 12B generated at the point of order replacement becomes a planar view shape as shown in FIG. 9. In addition, the arrow in FIG. 9 and FIG. 7 mentioned later shows the conveyance direction of the strip | belt-shaped double-sided corrugated cardboard sheet 11 in which the defective sheet 12B is included. That is, on the preceding side of the sheet, the slit 12a by the old order knife (in this case, the edge slitting knife of No. 1 unit) set to the trim position according to the old order is processed on both ends of the sheet, and on the subsequent side of the sheet, The slit 12b by the new order knife (in this case, the edge slitting knife of the No. 2 unit) set to the trim position according to the order is processed at both ends of the sheet.

Since the slitting knife is spaced apart from the thick double-sided corrugated cardboard sheet 11 while rotating at the end of slitting, behind the portion where the slit 12a ends, scratches 12c as shown by broken lines in FIG. 9 remain. . In addition, since the slitting knife enters the thick double-sided corrugated sheet 11 while rotating at the start of slitting, the scratch 12d as shown by a broken line in FIG. 9 in the front of the portion where the slit 12b starts. ) Remains.

On the other hand, the position of the edge cutting 12e by the edge cutting device 15 is arrange | positioned in the position which the slit 12a, 12b wraps in a conveyance direction so that it may cross | intersect any of the two old and new slit 12a, 12b. If not, you will not be able to remove the trim. For this reason, the old and new two slits 12a and 12b are wrapped with a fixed margin (wrap length) a ₁ . Therefore, in this case, the defective sheet length L ₁ is determined from the wrap length a ₁ by this old and new knife, the scratching length b by each knife, and each margin value before and after, It is expressed by the following equation.

L ₁ = a ₁ + 2b + 2α

By the way, the structure of the edge cutting device 15 conveys the edge cutting knife 151 and the double-sided corrugated sheet 11 in which the knife 151b protruded in the outer periphery of the cylinder 151a as shown in FIG. The anvil cylinder 152 provided with the anvil (elastic body) 152b on the outer peripheral surface of the cylinder 152a is provided so that the line 10 may be inserted and it may face the edge cutting knife 151. The edge cutting knife 151 and the anvil cylinder 152 are also provided in the whole machine width direction.

However, the anvil 152b of the anvil cylinder 152 has the location 152c cut in the notch shape from the front, and the area | region which has the anvil 152b only in the both ends of the cylinder 152a exists by this. Then, the knife 151b cuts both edges of the double-sided corrugated cardboard sheet 11 in the width direction only in the region having the anvils 152b at both ends. Since the width of the trim varies depending on the order, the phase of the anvil cylinder 152 is adjusted as necessary to change the area having the anvil 152b.

And normally, the edge cutting knife 151 is made to stand by waiting in the rotation phase which the knife 151b does not interfere with the double-sided corrugated sheet 11 on the conveyance line 10, and at the time of order replacement While adjusting the timing of the slitter knife of the old and new slitter-scorers, the knife 151b enters the wrap portions of the old and new two slits 12a and 12b and rotates to perform edge cutting. Therefore, the edge cutting knife 151 starts from the stand-by position, accelerates until the rotational speed becomes the peripheral speed equivalent to the conveying speed of the double-sided corrugated sheet 11 on the conveying line 10 to the half rotation, and after cutting the trim, Decelerate to the degree of rotation and stop at the standby position.

Patent Document 1: Patent No. 3396245 Patent Document 2: Japanese Patent Application Laid-Open No. 4-28538

By the way, in order to make effective use of paper resources and the like in the corrugator, it is required to shorten the length L ₁ of the defective sheet generated at the time of order replacement.

As described with reference to FIG. 9, the defective sheet length L1 is determined from the wrap length a ₁ by the old and new knives, the scratch length b by the respective knives, and the respective marginal values α before and after. Therefore, if these values can be made small, the length L ₁ can be made short. To this end, it is necessary to improve the accuracy and speed of the switching operation of the corrugator slitter-scorer or the edge cutting device, which has a limit and a limit to shortening the length L ₁ of the defective sheet. have.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has provided a trim processing method, a corrugator, and an edge cutting device in a corrugator, which can greatly suppress the length of a defective sheet generated when an order is replaced in a corrugator. It aims to provide.

In order to achieve the above object, the trim processing method in the corrugator of the present invention, at the time of order replacement in the corrugator, changes the trim width of the corrugated sheet, and uses the edge cutting device to trim the trim. A trim processing method for performing an edge cutting to separate the front and rear, the first edge cutting process for edge cutting the trim of the old order, and the second edge for edge cutting the trim of the new order behind the edge cutting point of the old order trim It is characterized by having a cutting process.

First knife scratches formed at the rear end of the place where the old order trim in the corrugated sheet is formed, and second knife scratches formed at the front end of the place where the new order trim in the corrugated sheet is formed. It is preferable to form in the area | region between this 1st edge cutting part formed in the said 1st edge cutting process, and the 2nd edge cutting point formed in the said 2nd edge cutting process.

The edge cutting device includes a cylinder in which an axis line is arranged in the width direction of the corrugator, and an edge cutting knife protruding from an outer circumference of the cylinder. In the normal operation of the corrugator, the edge cutting knife is the corrugated cardboard. The cylinder is stopped in a rotational phase that does not interfere with the conveying line of the sheet, and when the order is replaced, the cylinder is rotated approximately two times, the first edge cutting process is performed on the first rotation, and the second rotation is performed. It is preferable to perform a 2nd edge cutting process.

In the first edge cutting step and the second edge cutting step, the cylinder in the stationary state is accelerated to an edge cutting speed corresponding to the conveying speed of the corrugated sheet between about half a rotation, and edge cutting of the trim of the old order. And edge cutting of the trim of the new order, and then the cylinder is preferably stopped for approximately half a turn.

In this case, it is preferable to adjust the said edge cutting speed according to the conveyance speed of the said corrugated cardboard sheet.

Or the conveyance speed of the said corrugated cardboard sheet is variable, It is preferable to set the said edge cutting speed according to the highest conveyance speed of the said corrugated cardboard sheet.

When the order is replaced, a defective sheet generated between the product sheet of the old order and the product sheet of the new order includes a slit of the trim of the old order formed on both sides of a sheet front end portion, and the A first knife scratch continuously formed at each rear end of the slit, a slit of a trim of the new order formed at both sides of the rear end of the sheet rearward of the slit of the old order, and an angle of the slit of the new order The second edge cutting step at a position where the first edge cutting part formed in the first edge cutting step crosses the slit of the old order, while having a second knife scratch formed continuously in the front end portion; It is preferable that each of the second edge cutting points formed at is positioned at positions crossing the slit of the new order.

The corrugator of the present invention has a first slitter-scorer and a second slitter- having an edge cutting device for separating the trim of the corrugated sheet back and forth, and a slitting knife for slitting the trim, downstream of the double phaser. The edge cutting apparatus, the said 1 slitter-scorer, and the said 2nd slitter are provided with the scorer and the cut-off apparatus which separates the said corrugated cardboard sheet back and forth at the time of order replacement in the corrugator which performs edge cutting, in order. A corrugator having control means for controlling the operation of the rotor-scorer and the cutoff device, wherein the control means is one of the first slitter-scorer and the second slitter-scorer at the time of order replacement. The trim width of the corrugated sheet was changed by starting the operation of the other slitter scorer that was stopped while stopping the slitter scorer. At the same time, the edge cutting device is operated to perform a first edge cutting process of edge cutting the trim of the old order, and a second edge cutting process of edge cutting the trim of the new order behind the edge cutting point of the old order trim. It is characterized by.

First knife scratch area | region formed in the back end part of the place where the said old order trim in the said corrugated sheet is formed, and the second knife formed in the front end part of the place where the said new order trim in the said corrugated sheet is formed. It is preferable that a flaw area | region is formed in the area | region between the 1st edge cutting part formed in the said 1st edge cutting process, and the 2nd edge cutting point formed in the said 2nd edge cutting process.

The edge cutting device includes a cylinder in which an axis line is arranged in the width direction of the corrugator, and an edge cutting knife protruding from an outer circumference of the cylinder. The control means includes the edge during normal operation of the corrugator. The cutting knife stops the cylinder in a rotational phase that does not interfere with the conveying line of the corrugated sheet, when the order is replaced, the cylinder is rotated approximately two revolutions, and the first edge cutting treatment is performed on the first rotation. It is preferable to perform the said 2nd edge cutting process in 2nd rotation.

In the first edge cutting process and the second edge cutting process, the control means accelerates the cylinder in the stationary state to an edge cutting speed corresponding to the conveying speed of the corrugated sheet between approximately half a rotation, It is preferable to perform the edge cutting of the trim of the trim and the trim of the trim of the new order, and then stop the cylinder between approximately half revolutions.

In this case, it is preferable that the said control means adjusts the said edge cutting speed according to the conveyance speed of the said corrugated cardboard sheet.

Or, it is preferable that the said control means sets the conveyance speed of the said corrugated cardboard sheet to variable, and sets the said edge cutting speed according to the highest conveyance speed of the said corrugated cardboard sheet.

The defective sheet formed by the control means between the product sheet of the old order and the product sheet of the new order when the order is replaced includes a slit of a trim of the old order formed on both sides of the sheet front end portion, A first knife scratch formed continuously at each rear end of the slit, a slit of a trim of the new order formed at both sides of a sheet rear end of the rear of the slit of the old order, and an angle of the slit of the new order The second edge cutting treatment is provided at a position where the first edge cutting portion formed in the first edge cutting treatment intersects the slit of the old order, while having a second knife scratch formed continuously in the front end portion. It is preferable that each of the second edge cutting points formed at is positioned at positions crossing the slit of the new order.

An edge cutting device of the present invention is an edge cutting device for performing edge cutting for separating back and forth the trims formed at both ends of the corrugated sheet at the time of order replacement in the slitter-scorer, and at the traveling position of both ends of the corrugated sheet. First and second edge cutting knives divided in correspondingly and coaxially arranged, anvil cylinders installed opposite the first and second edge cutting knives by sandwiching a conveying line of the corrugated sheet, and the first edge cutting knives And a second support engaged with the second edge cutting knife, a rotation drive mechanism for rotationally driving the first and second edge cutting knives, extending in the device width direction, and the first and the second support. 2 a support beam supported from the rear surface, a back-up beam subjected to reaction when the first and second edge cutting knives cut the trim, and the first beam First and a second support, it characterized in that it has a width direction drive mechanism for driving the device in the transverse direction.

The width direction drive mechanism is rotatably supported by the backup beam and extends in the width direction of the device, and is formed by being drilled through the first support, and the first ball screw penetrates and is coupled thereto. And a screw hole formed in a hole formed in the second support, the second ball screw penetrated and screwed therein, and a drive source for rotationally driving the first and second ball screws.

The rotation drive mechanism may include a first axis that is a rotation axis of the first edge cutting knife axially supported by the backup beam and the first support, and the second edge cutting knife axially supported by the backup beam and the second support. It can be comprised with the 2nd axis | shaft which is a rotational axis of and the drive source which rotationally drives the said 1st and 2nd axis | shafts.

The anvil cylinder is constituted from first and second anvil cylinders which are divided coaxially to correspond to the traveling position of both ends of the corrugated sheet, and both the first and second anvil cylinders extend in the device width direction. It can be set as the structure supported by the 2nd backup beam.

The defective sheet shape of this invention is a defective sheet shape formed by the trimming method in the corrugator of any one of Claims 1-7, The said old order trim in the said corrugated sheet The first knife scratches formed at the rear end of the formed portion and the second knife scratches formed at the front end portion of the portion at which the new order trim in the corrugated sheet is formed are formed in the first edge cutting process. It is formed in the area | region between the 1st edge cutting part used and the 2nd edge cutting point formed in the said 2nd edge cutting process. It is characterized by the above-mentioned.

According to the trim processing method or the corrugator of the corrugator of the present invention, at the time of order replacement in the corrugator, the edge for separating the trim back and forth using an edge cutting device while changing the trim width of the corrugated sheet. In the trim processing for cutting, for example, in order to edge cut the trim of the old order, edge cut the trim of the new order behind the edge cutting point of the old order trim, and edge cut at two places before and after, for example, The first knife scratch formed at the rear end of the place where the order trim is formed and the second knife scratch formed at the front end of the place where the new order trim is formed can be formed in the area between the two edge cutting points. have. Thereby, the margin of the defective sheet generated at the time of order replacement is set to the length of the section from immediately before the front edge cutting point to immediately after the rear edge cutting point, that is, the length of the first knife scratch or the second knife scratch. The added length can be suppressed and the length of the defective sheet generated at the time of order replacement can be significantly suppressed.

According to the edge cutting apparatus of this invention, the 1st and 2nd edge cutting knifes are divided | segmented and coaxially arrange | positioned so that it may correspond to the traveling position of the both ends of a corrugated sheet, and each edge cutting knife is respectively backed by a backup beam. Coupled to the support supported therefrom, the reaction force when the first and second edge cutting knives cut the trim can be received in the backup beam via the support. Therefore, the axial length of the edge cutting knife is shortened, and since the rigidity that can be opposed to the reaction force at the time of trim cutting is unnecessary for the edge cutting knife, the diameter of the edge cutting knife can be reduced. Thereby, the space | interval of the cutting point at the time of cutting | disconnecting the trim part of a corrugated cardboard sheet two front and back by rotating this edge cutting knife two times can be reduced, and it can be applied to the trim processing method or corrugator in the corrugator of this invention. If applied, the length of the defective sheet generated at the time of order replacement can be further suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the defective sheet which arises at the time of order replacement of the corrugator which concerns on one Embodiment of this invention.
It is a side view which shows the principal part of the downstream part (dry end) of the corrugator which concerns on one Embodiment of this invention.
3 is a side view showing a slitter-scorer of the corrugator according to one embodiment of the present invention.
It is a perspective view which shows the edge cutting apparatus of the corrugator which concerns on one Embodiment of this invention.
It is a front view which shows the edge cutting device seen from the downstream side of the sheet conveying line of the corrugator which concerns on one Embodiment of this invention.
FIG. 6 is a flowchart for explaining processing upon order replacement of the corrugator according to one embodiment of the present invention. FIG.
7 is a perspective view illustrating an edge cutting device of a corrugator according to the background art.
Fig. 8 is a flowchart for explaining processing upon order replacement of a corrugator according to the background art.
Fig. 9 is a front view showing a defective sheet occurring upon order replacement of the corrugator according to the background art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 6 will be described based on these by explaining the processing associated with the corrugator and the order replacement thereof according to one embodiment of the present invention.

<Device Configuration>

First, the structure of the principal part of the corrugator which concerns on this embodiment is demonstrated.

Fig. 2 is a side view showing the main part of the downstream portion (dry end) of the corrugator according to the present embodiment. As shown in FIG. 2, the corrugator includes an edge cutting device 5, a first slitter-scorer (No. 1 unit) 2A, and a second slitter downstream of the double phaser 1. A ter scorer (No. 2 unit) 2B and a cutoff device 3 are provided in this order. Downstream of the cutoff device 3, a defective sheet removing device and a stacker (not shown) are provided in this order.

Two slitter-scorers 2 (first and second slitter-scorers) of the first slitter-scorer 2A and the second slitter-scorer 2B (2) Is arranged in series, and it is possible to cope with order replacement without stopping the line of the machine. That is, while one slitter scorer is being operated, the other slitter scorer is to be set according to the next order.

As shown in FIGS. 2 and 3, each slitter-scorer 2 sandwiches a conveying line 10 through which a strip-shaped double-sided corrugated sheet 11 is conveyed, and on one side thereof (in this case, downward). The slitter knife (slitter) 21 and the kneading rolls (scorers) 22 and 24 are provided and opposed to the slitter knife 21 on the other side (here, upward) of the conveying line 10. The roll 23 is provided. Moreover, the trim shooter 4 which processes the slitting by the slitter knife 21 is provided. In addition, the arrow in FIG. 3 shows the direction in which the strip | belt-shaped double-sided corrugated cardboard sheet 11 is conveyed.

The slitter knife 21 is moved upward to reach the position where the upper end portion passes through the double-sided corrugated cardboard sheet 11 running on the conveying line 10 and the operation of lowering the counter roll 23 to the conveying line 10 It is possible to perform the slitting grooving by the slitter knife 21. Similarly, with respect to the entanglement roll 22, while the entanglement part (not shown) raises the amount to a position which enters the lower surface of the double-sided corrugated sheet 11 which travels the conveyance line 10, the entanglement roll By carrying out the operation | movement state which dropped 24 to the conveyance line 10, it is possible to perform the lump insertion process by the lump insertion rolls 22 and 24. FIG. In the first slitter-scorer 2A shown in Figs. 2 and 3, the slitter knife 21, the kneading roll 22, and the like are in an operating state.

On the other hand, while lowering the slitter knife 21 to the position which does not interfere with the conveyance line 10, in the retracted (stored) state which raised the opposing roll 23 to the position which did not interfere with the conveyance line 10, And the kneading roll 22 is lowered to a position which does not interfere with the conveying line 10, and the evacuation (storage) state in which the kneading roll 24 is raised to a position which does not interfere with the conveying line 10. By doing this, preparation for the next order can be performed. In the second slitter-scorer 2B shown in Figs. 2 and 3, the slitter knife 21, the kneading roll 22, and the like are in an inoperative state.

In addition, in the preparation for the next order in the slitter-scorer 2, the slitter knife 21, the opposing roll 23, and the kneading rolls 22 and 24 are processed according to the next order, respectively. Is set in position.

As shown in FIG. 2, the cutoff apparatus 3 is equipped with the double blade type | mold provided with knife cylinder 31U, 31L in both up and down in this embodiment. Each knife cylinder 31U, 31L is comprised so that the spiral-shaped knife 33 which protruded in the axial direction on the outer periphery of the cylinder 32 may protrude. Each knife cylinder 31U, 31L rotates at the timing according to an order, isolate | separates strip | belt-shaped double-sided corrugated sheet 11 by predetermined length, and makes it the product sheet 12. As shown in FIG. In addition, although the product sheet 12 is peeled off from the conveyance line 10 and described in FIG. 2 in order to show the conveyance line 10, the product sheet 12 is also conveyed on the conveyance line 10. As shown in FIG. In addition, the cut-off apparatus 3 may be of the one blade type | mold provided with the knife cylinder in the upper and lower sides (for example, upper side), and the anvil cylinder in the other (the other side) (for example, lower side).

In the defective sheet removing apparatus downstream of the cutoff apparatus 3, the defective sheet in the product sheet 12 is specified based on the processing information and the product inspection information checked on the upstream side, and the appropriate product sheet ( It separates from the conveyance line 10 of 12). Therefore, only the appropriate product sheet 12 is mounted in the stacker downstream of the defective sheet removing apparatus.

When processing with the slitter-scorer 2, an unnecessary part called trim (also called ear) 11t occurs on both sides of the strip-shaped double-sided corrugated sheet 11. The trim 11t is cut (trimmed) by the slitter knife 21 positioned at a position corresponding to the slitter-scorer 2 and sent to the trim shooter 4 to the cut-off device 3. It is separated from the conveying line 10 of the product sheet sent.

At the time of order replacement, this trim width is also changed and the slitting position of the trim is discontinuous. At the point where this slitting becomes discontinuous, the trim and the product sheet are connected and cannot be separated. Thus, immediately upstream of the slitter-scorers 2A and 2B, an edge cutting device 5 for cutting the trim portion in the width direction (also referred to as edge cutting) is disposed, and upon order replacement, a strip-shaped double-sided corrugated cardboard At the point of order replacement of the sheet 11, the edge cutting device 5 is operated to cut (edge cut) the trim portion in the width direction to perform front and rear separation of the trim, and to separate the trim side and the product sheet side. .

When the edge cutting device 5 which concerns on this embodiment is demonstrated, as shown to FIG. 4, FIG. 5, the edge cutting knife has an edge cutting knife in the conveyance line of the strip | belt-shaped double-sided corrugated sheet 11 Divided into two, the 1st edge cutting knife 51R arrange | positioned so that it may correspond to the travel position of a right end part toward the conveyance direction of 10, and the 2nd edge cutting knife 51L arrange | positioned so that it may correspond to the travel position of a left end part. It is installed. Each edge cutting knife 51 (indicated by reference numeral 51 when not distinguishing between the first and second edge cutting knives) has a spiral shape in which the phase is shifted in the axial direction to the outer periphery of the cylinder 51a. It is a rotary knife (rotary car) in which the knife 51b protruded.

These edge cutting knives 51 are serration-coupled so that the rotating shaft 51c may rotate integrally with respect to the cylinder 51a, and the relative movement of an axial direction is possible, respectively. In addition, in this example, each rotation shaft 51c consists of the small diameter part of both ends, and the large diameter part 51d of the center, and the cylinder 51a is serrated by this large diameter part 51d of the center.

Moreover, the small diameter part of both ends is rotatably supported by the bracket 53a-53d fixedly attached to the 1st beam (1st backup beam) 53 which extends in the width direction of a machine. In addition, both ends of the first beam 53 are supported by the frames F and F, which are provided on both the left and right sides of the machine, and are provided above the edge cutting knife 51.

Between each edge cutting knife 51 and the 1st beam 53, the moving head (support) 52 which engages with and supports the edge cutting knife 51 is interposed, respectively. Bearing protrusions 52a and 52b protrude downwardly at both ends of the apparatus width direction of each moving head 52, and hollow shaft portions formed at both ends of the cylinder 51a at these bearing protrusions 52a and 52b. And 51e) are rotatably engaged so as to rotate and move integrally in the axial direction.

The female screw hole 52c through which the ball screw 54 penetrates and is screwed into the base part of the bearing projections 52a and 52b of each moving head 52 is machined. The ball screw 54 is rotatably supported by the brackets 53a to 53d fixed to the first beam 53. Therefore, when the ball screw 54 rotates, each moving head 52 moves with the each edge cutting knife 51 in the width direction of a machine.

A backing plate 55 is joined to the rear surface (upper surface) of each moving head 52, and the backing plate 55 can move relative to the sliding contact plate 55a provided on the lower surface of the first beam 53. Contacting you. If the upward cutting reaction force overlaps the edge cutting knife 51 when the edge cutting knife 51 is operated to cut the trim portion in the width direction, the reaction force is the moving head 52 and the backup plate 55 thereof. It is received by the first beam 53 through the sliding contact plate 55a.

Therefore, extremely large cutting reaction force is not applied to the rotating shaft 51c of the cylinder 51a of the edge cutting knife 51, and the stiffness and strength required for the cylinder 51a and its rotating shaft 51c are opposed to their own weight. It is good just to be able to do it, and the rigidity and strength which should be set can be suppressed significantly. In addition, since the edge cutting knife 51 is divided | segmented and each rotating shaft 51c is axially supported by the bracket 53a-53d and the bearing protrusions 52a, 52b each in the left and right, respectively, in multiple places, Also in this respect, the rigidity and strength required for the cylinder 51a and its rotating shaft 51c are reduced.

On the other hand, the anvil cylinder 57 is provided facing the edge cutting knife 51 by sandwiching the conveyance line 10 of the double-sided corrugated sheet 11. The anvil cylinder 57 has an anvil (elastic body) mounted on the outer circumferential surface of the cylinder, so that the anvil cylinder 57 supports the double-sided corrugated sheet 11 from above when the edge cutting knife 51 cuts the trim from below. To prevent the double-sided corrugated sheet 11 from running upward.

In this embodiment, it is comprised from the 1st and 2nd anvil cylinder divided | segmented and coaxially arranged so that it may correspond to the travel position of the both ends of the corrugated sheet 11, and both of these 1st and 2nd anvil cylinders 57 are apparatuses The shafts of both ends are rotatably supported by the brackets 58a to 58d fixed to the second beam (second backup beam) 58 extending in the width direction. Both ends of the second beam 58 are supported by the frames F and F, which are provided on both the left and right sides of the machine, and are provided below the anvil cylinder 57.

In addition, the both anvil cylinders 57 do not move in the axial direction, but only follow-up rotation in accordance with the movement of the corrugated cardboard sheet 11. Therefore, the axial length of the outer peripheral surface of both anvil cylinders 57 is set to the magnitude | size which can cover the axial movement range of the edge cutting knife 51. As shown in FIG.

In addition, the rotating shaft 51c of each edge cutting knife 51 is connected by the connecting shaft 56a, and the ball screw 54 screwed to each moving head 52 is connected to each anvil cylinder by the connecting shaft 56b. The rotary shafts of the 57 are coaxially connected to each other by the connecting shaft 56c, and the rotary shafts 51c and the ball screw 54 are respectively rotated and driven through the driving sources M1 and M2 connected to the driving side ends. do.

In addition, when the ball screw 54 rotates, each moving head 52 approaches or spaces together. At the time of order replacement, the width of the trim on both sides is also changed, and the position of edge cutting by each edge cutting knife 51 also changes. The position of the edge cutting need not be strictly adjusted, but at least the trim must be cut in all its width directions. Therefore, according to the width or position of the trim, the ball screw 54 is rotated to drive the edge cutting knife 51 together with each moving head 52 to adjust the position so that the trim can be cut in the width direction. do.

In addition, normally, the edge cutting knife 51 is made to stand by waiting in the rotating phase which the knife 51b does not interfere with the double-sided corrugated sheet 11 on the conveyance line 10, and when order replacement, The edge cutting knife 151 is started from the standby position, accelerated until the rotational speed is equivalent to the conveying speed of the double-sided corrugated sheet 11 on the conveying line 10 on the conveying line 10, and the trimming of the trim After completion (in this case, after the 1st cutting and the 2nd cutting performed after 1 rotation are completed together), it decelerates from a cutting speed to about half rotation and stops in a standby position.

<Control when replacing an order>

Such rotational drive of each ball screw 54 or rotational drive of each edge cutting knife 51 is performed by the production management apparatus (control means) 100 at each slitter-scorer 2 or cut-off at the time of order replacement. Controlled with device 3.

That is, when the order management apparatus 100 replaces an order, for example, as shown in FIG. 6, the production management apparatus 100 sequentially generates a production management signal, and this production management signal is sent to the corrugator so that each additional operation of the corrugator is performed. (Machine operation) In addition, this example has shown the case where order replacement is carried out from the state which uses the No. 1 unit 2A to the state which uses the No. 2 unit 2B.

That is, in the production management apparatus 100, when the start of order replacement is determined, the first edge cutting signal (step S10), the second edge cutting signal (step S12), and the No.1 unit stop signal (step S14). , No. 2 unit operation signal (step S16), cutter cutting dimension switching signal (step S18), and defect removal signal (step S20) are respectively generated and sent to the corrugator sequentially.

In the corrugator, first, according to these production management signals, the edge cutting device 5 is operated in accordance with the edge cutting signal, and the first edge cutting (step S21, the first edge cutting step) with respect to the trim portion, and the second time. No. 1 unit immediately after edge cutting (step S23, 2nd edge cutting process) is performed, and the edge cutting point (1st edge cutting point) by the 1st edge cutting passes through No. 1 unit 2A. In response to the stop signal, the No. 1 unit 2A is raised (spaced from the conveying line 10) and stopped (step S25). Further, immediately before the edge cutting point (second edge cutting point) by the second edge cutting enters the No. 2 unit 2B, the No. 2 unit 2B is lowered in accordance with the No. 2 unit operation signal ( Operation is started by approaching the transfer line 10 (step S27). Then, the rotational speed of the cutoff device 3 is changed in accordance with the product sheet length of the new order in accordance with the cutter cutting dimension switching signal (step S29), and the replacement of the order cut by the cutoff device 3 in accordance with the defect removal signal is performed. Since the product sheet corresponding to a location is a defective sheet, it removes with a defective sheet removal apparatus (step S31). This completes order replacement.

<Sheet shape at the time of order replacement explaining the effect (shortening of bad sheet length)>

According to such an order replacement process, the defective sheet 12A generated at the point of order replacement becomes a planar shape as shown in FIG. 1. That is, on the preceding side of the sheet, the slit 12a by the old order knife (in this case, the edge slitting knife of No. 1 unit) set to the trim position according to the old order is processed on both ends of the sheet, and on the subsequent side of the sheet, The slit 12b by the new order knife (in this case, the edge slitting knife of the No. 2 unit) set to the trim position according to the order is processed at both ends of the sheet. In addition, the arrow in FIG. 1 shows the conveyance direction of the strip | belt-shaped double-sided corrugated cardboard sheet 11 in which the defective sheet 12A is included.

Since the slitting knife is spaced apart from the thick double-sided corrugated cardboard sheet 11 while rotating at the end of slitting, the slitting knife is located behind the portion where the slit 12a ends (rear end portion where the old order trim is formed). As shown by broken lines at 1, scratches (first knife scratches) 12c remain. In addition, since the slitting knife enters the thick double-sided corrugated cardboard sheet 11 while rotating at the start of slitting, the slitting knife is placed in front of the portion where the slit 12b starts (the front end portion where the new order trim is formed). As shown by the broken line in FIG. 1, scratches (second knife scratches) 12d remain.

In this embodiment, 1st edge cutting by the edge cutting device 5 (edge cutting point is 1st edge cutting point 12f), and subsequent 2nd edge cutting (edge cutting point is 2nd edge cutting point). (12g)), as shown in FIG. 1, the conveying line 10 of the old order knife so that the scratch 12c by the old order knife and the scratch 12d by the new order knife almost completely wraps. The first edge cut 12f and the first cut at the position at which the areas where these scratches 12c and 12d are formed are fitted inside by synchronizing the departure from the step S and the entry of the new order knife into the transfer line 10. The edge cutting knife 51 of the edge cutting device 5 is controlled so that the two edge cuttings 12g are arranged. As a result, the bad sheet length L2 is determined from the length (inter-edge length) a2 of the two edge cuts 12f and 12g, and each clearance value (alpha) before and after, and is represented by following Formula (1). do.

L ₂ = a ₂ + 2α... (One)

The length a2 between edges is determined from the length b of the scratches 12c and 21d and the margin values before and after, and is expressed by the following expression (2).

a ₂ = b + 2β... (2)

Since the margin value 2β is considered to be about the margin (wrap length) a ₁ of the slits 12a and 12b in FIG. 9, the defective sheet length L ₂ is expressed by the following equation (3) from this relationship. do.

L ₂ = a ₂ + a ₁ ... (3)

When this defective sheet length L ₂ is represented using the defective sheet length L ₁ shown in FIG. 9, it is represented by the following formula (4).

L ₂ = L ₁ -b... (4)

Therefore, the defective sheet length L ₂ can be shortened by the length b of the scratches 12c and 12d as compared with the conventional defective sheet length L ₁ .

Therefore, in actual conversion, the defective sheet length in the operation | movement of a line speed of 300 m / min can be made into 700-750 mm that was 900 mm in the past, and the loss rate can be reduced around 20%.

According to the trim processing method and the corrugator in the present corrugator, the trim width of the corrugated cardboard sheet 11 is changed at the time of order replacement, and the edge cutting device 5 is used to To cut the trim, to trim the new order's trim behind the edge cutting point of the old order trim, and to cut the edge at two places before and after, the defective sheet length L2 can be significantly shortened, and the paper Resources can be used more effectively.

In order to shorten this defective sheet length L2, it is necessary to shorten the distance of edge cutting sufficiently in the front and back two places, and, for this, should the rotation of the edge cutting knife 51 be made quick, or the edge cutting knife 51 of It is necessary to reduce the outer diameter and to suppress the circumferential length of one rotation of the edge cutting knife 51, but the edge cutting knife 51 accelerates from the stopped state to the cutting speed in accompaniment, and does not stop from the cutting speed in the accompaniment. No, not easy. In addition, as shown in the background art shown in Fig. 7, the cylinder 51a of the edge cutting knife 51 extends over the entire device width, and in the case of opposing the cutting reaction with its rigidity and strength, From the standpoint of securing rigidity and strength, it is difficult to reduce the outer diameter of the edge cutting knife 51.

According to this point and this edge cutting device 5, the 1st and 2nd edge cutting knives 51R and 51L are divided | segmented and arrange | positioned so as to correspond to the traveling position of the both ends of the corrugated sheet 11, and each edge cutting The knives 51R and 51L are respectively coupled to the moving head 52 supported from the back by the backup beam 53, and the first and second edge cutting knives 51R and 51L can cut the trim 11t. The reaction force at the time can be received by the backup beam 53 via the moving head 52.

Therefore, the axis lengths of the edge cutting knives 51R and 51L are shortened, and the rigidity as much as the edge cutting knives 51R and 51L can be opposed to the reaction force at the time of trim cutting is unnecessary. For this reason, the diameter of edge cutting knife 51R, 51L can be reduced. Therefore, when the trim part of the corrugated cardboard sheet 11 is cut in two places before and after by rotating this edge cutting knife two times, the space | interval of the cutting point can be reduced, and it applies to a trim processing method or a corrugator, and at the time of order replacement, This can further reduce the length L2 of the defective sheet generated.

<Others>

As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above.

For example, in said embodiment, although the edge cutting apparatus 5 peculiar to FIG. 4, FIG. 5 is used, the edge cutting apparatus 15 similar to the background art shown in FIG. As long as the distance of edge cutting can be made short enough, you may perform the trim processing method and corrugator in the corrugator which concerns on this invention using such edge cutting apparatus 15. As shown in FIG.

In addition, the shape of the defective sheet | seat shown in FIG. 1 is an example, It is not limited to this. That is, even if the scratches 12c and 12d do not completely wrap, they should just be wrapped to some extent.

That is, although the scratches 12c by the old order knife and the scratches 12d by the new order knife do not almost completely wrap, the scratches 12c by the old order knife and the scratches 12d by the new order knife are If the bad sheet shape is configured to be formed in an area between the first edge cutting point 12f by the first edge cutting and the second edge cutting point 12g by the second edge cutting thereafter, the bad sheet length is formed. L2 can be reduced than before.

As a matter of course, the smaller the deviation of the lap, the shorter the length L2 of the defective sheet can be.

Moreover, you may apply the edge cutting apparatus 5 peculiar to FIG. 4, FIG. 5 to the trimming method in the corrugator which concerns on this invention, and corrugators other than a corrugator.

Industrial Applicability

The present invention can be widely applied to a corrugator for producing a corrugated sheet, and is particularly effective when order replacement is performed without stopping the line of the corrugator even when order replacement of the corrugated sheet whose trim width is changed.

1 double pacer
11 strip double-sided corrugated sheet
10 bounce lines
12 product sheets
12A bad seat
12a, 12b slit
12c, 12d scratches
2A 1st Slitter Scorer (No.1 Unit)
2B 2nd Slitter Scorer (No.2 Unit)
21 Slitter Knife (Slitter)
22 Bullion Roll (Scorer)
23, 24 opposed rolls
3 cutoff devices
31U, 31L Knife Cylinder
32 cylinder
33 knives
4 Trim Shooter
5 edge cutting device
51R first edge cutting knife
51L 2nd Edge Cutting Knife
51a cylinder
51b knife
51c rotary shaft
Large diameter part of 51d rotary shaft 51c
52 Moving Head (Support)
51e hollow shaft
52a, 52b bearing protrusions
53 First beam (first backup beam)
53a to 53d bracket
54 ball screw
55 backup plate
55a sliding contact plate
56a to 56c connecting shaft
57 anvil cylinder
58 Second beam (second backup beam)
58a to 538 bracket
100 Production Management Equipment (Control Means)
F frame
M1, M2 drive source
L2 bad sheet length
a2 length between edges
b scratch 12c, the length of 12d
α, β margin

Claims (17)

It is a trim processing method which changes the trim width of a corrugated cardboard sheet at the time of order replacement in a corrugator, and performs edge cutting which separates said trim back and forth using an edge cutting apparatus,
A first edge cutting process of edge cutting the trim of the old order,
And a second edge cutting step of edge cutting the trim of the new order behind the edge cutting point of the old order trim. The method of claim 1,
First knife scratches formed at the rear end of the place where the old order trim in the corrugated sheet is formed, and second knife scratches formed at the front end of the place where the new order trim in the corrugated sheet is formed. Trimming in a corrugator formed in the area | region between this 1st edge cutting part formed in the said 1st edge cutting process, and the 2nd edge cutting point formed in the said 2nd edge cutting process. Treatment method. The method according to claim 1 or 2,
The edge cutting device includes a cylinder in which an axis line is arranged in the width direction of the corrugator, and an edge cutting knife protruding from an outer circumference of the cylinder,
In normal operation of the corrugator, the edge cutting knife stops the cylinder in a rotational phase that does not interfere with the conveying line of the corrugated sheet,
In the replacement of the order, the cylinder is rotated approximately two times, the first edge cutting process is performed at the first rotation, and the second edge cutting process is performed at the second rotation. How to handle trim. The method of claim 3,
In the first edge cutting step and the second edge cutting step, the cylinder in the stationary state is accelerated to an edge cutting speed corresponding to the conveying speed of the corrugated sheet between about half a rotation, and the edge of the trim of the old order. Edge cutting of the cutting and the trim of the new order, and then the cylinder is stopped between approximately half a revolution, the trimming method in the corrugator. 5. The method of claim 4,
The edge cutting speed is adjusted in accordance with the conveying speed of the corrugated sheet, trim processing method in a corrugator. The method of claim 5,
The conveyance speed of the said corrugated sheet is variable, and the said edge cutting speed is set according to the highest conveying speed of the said corrugated sheet, The trim processing method in the corrugator characterized by the above-mentioned. 7. The method according to any one of claims 1 to 6,
When the order is replaced, a defective sheet generated between the product sheet of the old order and the product sheet of the new order includes a slit of the trim of the old order formed on both sides of a sheet front end portion, and the A first knife scratch continuously formed at each rear end of the slit, a slit of a trim of the new order formed at both sides of the rear end of the sheet rearward of the slit of the old order, and an angle of the slit of the new order The second edge cutting process is provided at a position where the first edge cutting portion formed in the first edge cutting process intersects the slit of the old order, while having a second knife scratch formed continuously in the front end portion. Trims in the corrugator, wherein the second edge cutting points formed at are positioned at positions crossing the slit of the new order, respectively. Li method. Downstream of the double phaser, an edge cutting device for separating the trim of the corrugated sheet back and forth, a first slitter scorer and a second slitter scorer having a slitting knife for slitting the trim, and edge cutting At the time of order replacement in a corrugator, the said edge cutting apparatus, the said 1st slitter-scorer, the said 2nd slitter-scorer, and the said cut-off apparatus are provided with the cut-off apparatus which isolates the said corrugated sheet back and forth in order. A corrugator with control means for controlling the operation of the
The control means, at the time of order replacement,
A trim width of the corrugated sheet is obtained by operating and starting the other slitter-scorer, which has been stopped while stopping the slitter-scorer in use among the first slitter-scorer and the second slitter-scorer. At the same time,
A first edge cutting process of operating the edge cutting device to edge cut the trim of the old order, and a second edge cutting process of edge cutting the trim of the new order behind an edge cutting point of the old order trim. Corrugator made with. 9. The method of claim 8,
First knife scratch area | region formed in the back end part of the place where the said old order trim in the said corrugated sheet is formed, and the second knife formed in the front end part of the place where the said new order trim in the said corrugated sheet is formed. The scratch area | region is formed in the area | region between the 1st edge cutting part formed in the said 1st edge cutting process, and the 2nd edge cutting point formed in the said 2nd edge cutting process, The corrugator characterized by the above-mentioned. 10. The method according to claim 8 or 9,
The edge cutting device includes a cylinder in which an axis line is arranged in the width direction of the corrugator, and an edge cutting knife protruding from an outer circumference of the cylinder,
The control means stops the cylinder in a rotational phase in which the edge cutting knife does not interfere with the conveying line of the corrugated sheet during normal operation of the corrugator, and approximately 2 turns of the cylinder when the order is replaced. And the first edge cutting process is performed on the first rotation, and the second edge cutting process is performed on the second rotation. The method of claim 10,
In the first edge cutting process and the second edge cutting process, the control means accelerates the cylinder in the stationary state to an edge cutting speed corresponding to the conveying speed of the corrugated sheet between approximately half a rotation, And edge cutting of the trim of the order, and edge cutting of the trim of the new order, and then stopping the cylinder between approximately half a revolution. The method of claim 11,
The said control means adjusts the said edge cutting speed according to the conveyance speed of the said corrugated cardboard sheet, The corrugator characterized by the above-mentioned. The method of claim 11,
The conveyance speed of the said corrugated sheet is variable, The said control means sets the edge cutting speed according to the highest conveyance speed of the said corrugated sheet, The corrugator characterized by the above-mentioned. The method according to any one of claims 8 to 13,
At the time of order replacement, the defective sheet formed between the product sheet of the old order and the product sheet of the new order includes the slits of the trim of the old order formed on both sides of the sheet front end and the slits of the old order. A first knife scratch formed continuously at each rear end portion, a slit of a trim of the new order formed at both sides of a sheet rear end portion rearward of the slit of the old order, and at each front end of the slit of the new order The second edge cutting process is provided in the second edge cutting process at a position where the first edge cutting point formed in the first edge cutting process intersects the slit of the old order, while having a second knife scratch formed continuously. A corrugator, wherein a second edge cutting point is located at a position intersecting the slit of the new order. It is an edge cutting apparatus which performs the edge cutting which separates the trim formed in the both ends of a corrugated sheet back and front at the time of order replacement in a slitter scorer,
First and second edge cutting knives divided and coaxially arranged so as to correspond to driving positions of both ends of the corrugated sheet;
An anvil cylinder installed opposite the first and second edge cutting knives by sandwiching a conveying line of the corrugated sheet;
A first support coupled to the first edge cutting knife and a second support coupled to the second edge cutting knife;
A rotation drive mechanism for rotationally driving the first and second edge cutting knives;
A backup beam extending in the width direction of the apparatus to support the first and second supports from the rear surface, and receiving a reaction force when the first and second edge cutting knives cut the trim;
An edge cutting device having a width direction drive mechanism for driving the first and second supports in the device width direction. 16. The method of claim 15,
The width direction drive mechanism is rotatably supported by the backup beam and extends in the width direction of the device, and is formed by being drilled through the first support, and the first ball screw penetrates and is coupled thereto. A screw hole to be formed, drilled in the second support, the screw hole through which the second ball screw penetrates, and a drive source for rotationally driving the first and second ball screws;
The rotation drive mechanism may include a first axis that is a rotation axis of the first edge cutting knife axially supported by the backup beam and the first support, and the second edge cutting knife axially supported by the backup beam and the second support. Has a second axis, which is a rotational axis of, and a drive source for rotationally driving the first and second axes,
The anvil cylinder is constituted from first and second anvil cylinders which are divided coaxially to correspond to the traveling position of both ends of the corrugated sheet, and both the first and second anvil cylinders extend in the device width direction. Edge support device characterized in that supported by the second backup beam. It is a bad sheet shape formed by the trimming method in the corrugator of any one of Claims 1-7,
First knife scratches formed at the rear end of the place where the old order trim in the corrugated sheet is formed, and second knife scratches formed at the front end of the place where the new order trim in the corrugated sheet is formed. It is formed in the area | region between this 1st edge cutting part formed in the said 1st edge cutting process, and the 2nd edge cutting point formed in said 2nd edge cutting process, The bad sheet shape characterized by the above-mentioned.

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