JPH10272709A - Ruling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly deal with change of order by effectively forming satisfactory rule in response to processing conditions such as a thickness and hardness of a corrugated fiberboard sheet. SOLUTION: An upper rotary shaft 24 and lower rotary shaft 26 are disposed in parallel to vertically sandwich a supply line of corrugated fiberboard sheet 20 so that the shafts 24, 26 rotate in opposite directions. A plurality of male rule rolls 28 are disposed to integrally rotate separately in an axial direction, and a plurality of female rule rolls 30 are rotatably disposed in relation to be opposed to the respective rolls 28. First protrusion 28a and second protrusion 28b of different shapes and sizes are formed on an outer periphery of the roll 28, and first recess 30a and second recess 30b corresponding to the protrusions 28a, 28b formed on the rolls 28 are formed on an outer periphery of the roll 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crease device for forming a crease for folding (vertical crease) in a direction parallel to the supply direction by supplying a corrugated cardboard sheet between a pair of crease rolls. Things.

[0002]

2. Description of the Related Art In order to manufacture a blank for box making by processing a corrugated cardboard sheet cut to a predetermined length, the sheet is required to be subjected to slotting and vertical scoring (clearing). ). For this purpose, a composite device generally called a flexo printer slotter is suitably used. For example, this composite apparatus is configured by arranging units such as a flexographic printing machine, a crease device (creaser), and a grooving device (slotter) in series, and performs necessary printing on a corrugated cardboard sheet passing through these units. , Vertical rules (crees) and grooves (slots) are sequentially formed.

[0003] In a conventional crease device, a male crease roll and a female crease roll rotating in opposite directions to each other are arranged to face each other above and below a corrugated cardboard sheet supply line. Also, in general, a convex portion is formed on the outer periphery of the male ruled line roll, and a concave portion corresponding to the convex portion is formed on the outer periphery of the female ruled line roll. It is configured to form parallel vertical rules. In addition,
As the shape of the ruled line roll, there are a convex type, a concave type, a flat type and the like, and each of them may be used in a required combination.

[0004]

The corrugated cardboard sheet may be a double-sided corrugated cardboard sheet of A-stage or B-stage, or AB
There are a plurality of types having different thicknesses, such as double-sided corrugated cardboard sheets. However, the male crease roll and the female crease roll of the crease device are of one type, and it is difficult to reliably form good vertical rules on all types of corrugated cardboard sheets. . For example, if the gap between the male ruled line roll and the female ruled line roll is set according to the middle thickness cardboard sheet, the vertical rule will be too weak for a thin sheet such as a double-sided corrugated cardboard sheet of B flute. In addition, there is a problem that not only the box making in the post-process is not performed well, but also the box made is distorted. Conversely, a thick sheet, such as a double-sided corrugated cardboard sheet, has too strong a vertical rule, which may cause cracks in the vertical ruled portion. Further, even if the gap between the male ruled line roll and the female ruled line roll is set to an optimum value using the gap adjusting means, the material such as the core paper and the liner,
If (weight per unit area) and the like are different, it is difficult to always form a good vertical rule on a plurality of types of sheets unless the shape and material of the ruled roll are changed to those that match the corrugated cardboard sheet. there were.

It is to be noted that, for each type of corrugated cardboard sheet, a male ruled roll and a female ruled roll formed with convex portions and concave portions in accordance with processing conditions such as thickness, material and basis weight are selected and exchanged. Good vertical rules can be reliably formed on various types of corrugated cardboard sheets. However, the work of removing and replacing both rolls every time the order is changed takes a very long time,
It causes a decrease in production capacity. In addition, it is pointed out that preparing the male ruled line roll and the female ruled line roll corresponding to each type of the corrugated cardboard sheet increases costs and complicates storage and management.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems inherent in the prior art, and has been proposed to appropriately solve the problems. An object of the present invention is to provide a ruled line device that can reliably form a good ruled line (vertical ruled line) according to processing conditions and can quickly respond to an order change.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and appropriately attain the intended purpose, the present invention relates to a ruled line roll which is disposed oppositely in a vertical relationship with a cardboard sheet supply line interposed therebetween. And a second crease roll, and a crease device for forming a crease parallel to the supply line on a corrugated cardboard sheet supplied between the two crease rolls. And a ruled line is formed on the corrugated cardboard sheet by selectively using the corrugated sheet according to processing conditions such as the thickness, material, and basis weight of the corrugated cardboard sheet.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of a ruler according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram illustrating a ruler according to a preferred embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of a flexographic printer slotter employing the ruler according to the embodiment.

A flexo printer slotter 10 shown in the figure
Is configured by arranging units of a sheet feeding device 12, a flexographic printing press 14, a ruled line device 16 and a groove cutting device 18 in series. A large number of the corrugated cardboard sheets 20 cut to a predetermined length are stacked and stored in the sheet feeding device 12, and the kicker 22 provided in the device 12 flexibly applies the lowermost sheet 20 one by one to the downstream side. It is sent and supplied horizontally to the printing device 14. For example, in the case of two-color printing, the flexographic printing device 14 is configured by a series group of a first printing unit 14a and a second printing unit 14b having exactly the same configuration, and when the corrugated cardboard sheet 20 passes through each printing unit 14a, 14b. Flexo printing of the required color is performed.

The corrugated cardboard sheet 20, which has passed through the printing units 14a and 14b and has been subjected to required printing, is supplied to a crease device 16 provided downstream thereof, subjected to a required cleaving process, and further subjected to a grooving device 18. It is supplied and subjected to a required slotting process. The blank 21 (see FIG. 4 (b)) on which the required printing has been performed as described above, and which has been further subjected to the creasing process and the slotting process, is supplied to a box-making machine provided on the downstream side (not shown). Assembled in the required box.

In the ruled line device 16, as shown in FIG.
In the vertical relationship sandwiching the supply line of the cardboard sheet 20,
An upper rotating shaft 24 and a lower rotating shaft 26 extending in a direction (lateral direction) intersecting with the supply line are disposed in parallel with each other.
4, 26 are configured to rotate in opposite directions to each other.
A plurality of male ruled line rolls (one ruled line roll) 28 are disposed on the upper rotating shaft 24 so as to rotate integrally with each other while being spaced apart in the axial direction. Multiple female crease rolls (other crease rolls) 3 in opposing relationship
0 is disposed rotatably. The male crease roll 28
A first protrusion 28a and a second protrusion 28b as ruled shapes having different shapes and dimensions are formed on the outer periphery of the female ruled roll 30. On the outer periphery of the female ruled roll 30, the convex formed on the male ruled roll 28 is formed. A first concave portion 30a and a second concave portion 30b are formed as ruled shapes corresponding to the portions 28a and 28b. Then, each pair of the first convex portion 28a and the first concave portion 30a or the second convex portion 2
A vertical rule 32 parallel to the supply line is formed on the corrugated cardboard sheet 20 passing through a ruled portion where the second recess 8b and the second recess 30b face each other.

In the embodiment, one pair of the first protrusions 28a is formed.
The first concave portion 30a is set in a shape suitable for forming the vertical rule 32 on a double-faced corrugated cardboard sheet having a small thickness such as an A-stage or a B-stage, and having a small basis weight. The portion 28b and the second concave portion 30b are set in a shape suitable for forming the vertical rule 32 on a double-sided corrugated cardboard sheet having a large thickness such as an AB step or a double-sided corrugated cardboard sheet using a reinforced core. When the flexoprinter slotter 10 forms the blank 21 for the A-type box shown in FIG. 4B, a male ruled roll 28 and a female ruled roll 30 are provided on the upper and lower rotating shafts 24 and 26, respectively. Provided blanks 21
, Vertical rules 32 are formed at four locations separated in the horizontal direction that intersects the sheet feeding direction. The male ruled line roll 28 and the female ruled line roll 30 are configured to be movable and adjustable in the axial direction of the rotating shafts 24 and 26 when the order of the corrugated cardboard sheet 20 is changed.

The upper and lower rotating shafts 24 and 26 are used to rotate the rotating shafts 24 and 26 to an existing common drive source (for example, a line shaft in a corrugator line) for driving other units connected to the ruler device 16. The male ruled roll 2 is connected via a differential 34 as a control means.
8 and the female ruled line roll 30 are configured to be rotationally driven in mutually opposite directions at a peripheral speed that matches the feeding speed of the corrugated cardboard sheet 20. As shown in FIG.
Various processing conditions such as the corrugated sheet type, sheet type, material, thickness, and grammage of the corrugated cardboard sheet 20 are input to the control device 36 that outputs a control signal to the controller 36. The control device 36 controls the male ruled line roll 28 according to the input processing conditions of the corrugated cardboard sheet 20 on which the vertical rule 32 is to be formed.
And the first convex portion 28a and the first concave portion 3 of the female crease roll 30.
It is determined that the vertical rule 32 is to be formed on the corrugated cardboard sheet 20 by using either the first convex portion 0a or the second convex portion 28b and the second concave portion 30b. Then, a control signal is output from the control device 36 to the differential device 34, and the differential device 34
8 and the female crease roll 30 as a pair, the first convex portion 28a and the first concave portion 30a or the second convex portion 28b and the second concave portion 30b.
Controls the rotation of the rotating shafts 24 and 26 so as to face the ruled line forming position of the corrugated cardboard sheet 20 and form the vertical ruled line 32 at that position.

The various processing conditions of the order to be produced are input in advance to a higher-level production management device (not shown). May be supplied to control the differential device 34. Further, it is also possible to adopt a configuration in which each of the male ruled line roll 28 and the female ruled line roll 30 is differentiated by different differentials.

The grooving device 18 is, as shown in FIG.
A slotter shaft 38 and a receiving blade shaft 40 that rotate in opposite directions to each other are disposed so as to face each other in a vertical relationship.
A disk-shaped holder 44 provided with two groove cutting blades 42, 42 spaced apart in the circumferential direction is provided at a position corresponding to each male ruled roll 28 in the ruled line device 16, respectively. The receiving shaft 40 is provided with a disk-shaped holder 48 having two receiving blades 46 and 46 (only one of which is shown) cooperating with the groove cutting blade 42. They are arranged at positions corresponding to the ruled line rolls 30, respectively. The corrugated cardboard sheet 20 on which the vertical rules 32 supplied between the corresponding groove cutting blades 42 and the receiving blades 46, 46 are formed is provided at both front and rear ends in the supply direction corresponding to the vertical rules 32,
The groove 50 having a required depth is formed, and the blank 21 for the A-type box shown in FIG. 4B is formed.

In the blank 21 shown in FIG.
Vertical rules between the grooves 50, 50 formed at both ends of the
For the length L of 32, the male ruled line roll 28 is formed.
Formed on the first convex portion 28a and the female ruled line roll 30
Perimeter L of first recess 30a₁, L _Two(See FIG. 4A)
Has L ≦ L₁, L_TwoIs set to be Male rule of the embodiment
Second convex portion 28b of wire roll 28 and female crease roll 30
The circumference of the second concave portion 30b is equal to the first convex portion 28a and
Perimeter L of first recess 30a₁, L_TwoIs set the same as
You. By the way, the length L between the grooves 50, 50 was made
It defines the depth of the box.

[0017] Incidentally, the terms circumferential length L ₂ is a circumferential length of L ₁ and the first recess 30a of the first convex portion 28a, the circumferential length of the first recess 30a and the first recess 30a than the length L of the Tatekei 32 L ₁ , L
₂ may be shorter by α or β, for example, L ₁ <L ≦ (L ₁ +
α + β) and L ₂ <L ≦ (L ₂ + α + β) (see FIG. 9). However, α and β are set to values that do not hinder bending at the vertical rule 32. Although FIG. 9 shows that α and β exist on the left and right sides, a case where α and β exist only on either the left or right side may be used. And
In the case where as described above was set circumferential length L ₂ of the circumferential length L ₁ and the first recess 30a of the first convex portion 28a also, alpha and β
Area is not provided with the vertical rule 32 at all.
The vertical rule 32 is formed by the convex portion 28b and the second concave portion 30b.

[0018]

Next, the operation of the ruled line device according to the above-described embodiment will be described. When data of processing conditions such as the thickness, material, and basis weight of the corrugated cardboard sheet 20 are input to the control device 36, the control device 36 determines which of the convex portions of the male ruled line roll 28 and the female ruled line roll 30 based on the data. It is determined whether to select and use 28a, 28b or recesses 30a, 30b. For example, a thin cardboard sheet 2
In the case where the vertical rule 32 is formed on the first convex portion 28a, the first convex portion 28a and the first
A control signal is sent to the differential 34 to selectively use the recess 30a.

That is, at the position where the ruled line is to be formed on the corrugated cardboard sheet 20, as shown in FIG. 5, both rotations are performed so that the first convex portion 28 a of the male ruled roll 28 and the first concave portion 30 a of the female ruled roll 30 face each other. The rotation of the shafts 24, 26 is controlled by the differential 34. Then, when the corrugated cardboard sheet 20 on which the required printing has been performed by the flexographic printing apparatus 14 on the upstream side is supplied between the male ruled line roll 28 and the female ruled line roll 30, the sheet 20 has a first convex portion 28a. The vertical rule 32 is formed at the position where the ruled line is to be formed by the first concave portion 30a. Corrugated cardboard sheet 20 on which vertical rules 32 are formed
On the downstream side, a required slotting process is performed by the groove cutting device 18. The blank 21 that has been subjected to the required printing in this way and further subjected to the creasing process and the slotting process is assembled into a required box by a downstream box making machine.

As described above, the thin corrugated cardboard sheet 20
The first convex portion 28 having a shape and dimensions according to the processing conditions
Since the vertical rule 32 is formed by selecting a and the first concave portion 30a, the vertical rule 32 is not too weak or too strong. Therefore, the box making in the post-process is favorably performed, and the occurrence of cracks in the ruled line in the vertical ruled portion is avoided.

Next, when the vertical rule 32 is formed on the thick corrugated cardboard sheet 20 or the corrugated cardboard sheet 20 having a high hardness by changing the order, the processing conditions are input to the control device 36, and the device 36 is processed. Then, the male ruled line roll 2
8 and a control signal is sent to the differential 34 to use the second convex portion 28b and the second concave portion 30b of the female ruled line roll 30.

That is, as shown in FIG. 6, at the position where the ruled line is to be formed on the corrugated cardboard sheet 20, both the rotations are performed such that the second convex portion 28b of the male ruled line roll 28 and the second concave portion 30b of the female ruled line roll 30 face each other. The rotation of the shafts 24, 26 is controlled by the differential 34. When the corrugated paperboard sheet 20 on which the required printing has been performed by the upstream flexographic printing apparatus 14 is supplied between the male ruled line roll 28 and the female ruled line roll 30, the sheet 20 has a second convex portion 28b. The vertical rule 32 is formed at the position where the ruled line is to be formed by the second concave portion 30b. Corrugated cardboard sheet 20 on which vertical rules 32 are formed
After being subjected to a required slotting process by the groove cutting device 18 on the downstream side, it is assembled into a required box by a box making machine in the same manner as described above.

As described above, the thick cardboard sheet 2
Even in the case of 0, the second convex portion 28b and the second concave portion 30b having a shape and a size corresponding to the processing condition are selected and the vertical rule 32 is selected.
Is formed, the vertical rule 32 is not too weak or too strong, so that the box making in the subsequent process is performed well, and the generation of a ruled line crack in the vertical rule is avoided.

As described above, in the ruled line device 16 according to the embodiment, the convex portions 28 for forming the optimum vertical ruled lines 32 according to the processing conditions such as the thickness, material, and basis weight of the corrugated cardboard sheet 20.
Since the a and b and the recesses 30a and 30b are selected and used, a good vertical rule 32 can be reliably formed on each type of corrugated cardboard sheet 20. Therefore, it is possible to satisfactorily perform the box making in the post-process and prevent the vertical ruled portion from breaking the ruled line. Further, since only the convex portions 28a and 28b and the concave portions 30a and 30b formed on the male ruled line roll 28 and the female ruled line roll 30 are selected, the setup change time when changing the order can be shortened, and the production capacity can be improved. I can make it.

[0025]

[Modification] FIG. 7 shows a ruled line device 16 according to the embodiment.
The ruled line units 16a and 16b having the same configuration are arranged in series upstream of the grooving device 18. In the first ruled line unit 16a on the upstream side, the first convex portion 28a and the second convex portion 28b
Is formed, and a first crease is formed on the outer circumference of the female crease roll 30.
A recess 30a and a second recess 30b are formed. In the second ruled line unit 16b on the downstream side, the male ruled line roll 28
A third concave portion 30c and a fourth concave portion 30d are formed on an outer periphery of the female ruled line roll 30 while a third convex portion 28c and a fourth convex portion 28d are formed on the outer periphery of the female ruled line roll 30. Both units 16
a, 16b, the first to fourth protrusions 28a, 28b, 2
8c, 28d and the first to fourth recesses 30a, 30b, 3
0c and 30d are formed in different shapes and dimensions, respectively.
The corrugated cardboard sheet 20 is configured to be used properly according to the processing conditions. In addition, both units 16a and 16b are
When not in use, it is configured to be separated from the supply line of the corrugated cardboard sheet 20 and to be kept in a state where it cannot be scored.

That is, the ruled line device 1 of the modified example shown in FIG.
6, four different types of projections 28a, 28b, 28
c, 28d and recesses 30a, 30b, 30c, 30d,
Since it can be selected and used according to the processing conditions of the corrugated cardboard sheet 20, the processing conditions of the sheet 20 can be finely classified and a good vertical rule 32 can be reliably formed on each type of corrugated cardboard sheet 20. . Note that, depending on the type of the corrugated cardboard sheet 20, after the vertical rule 32 is formed by the first ruled line unit 16a, the vertical rule 32 is further formed by the second ruled line unit 16b.
Can also be formed.

FIG. 8 shows a modified example of the male ruled line roll 28. Three types of convex portions 28a, 28b and 28c having different shapes and dimensions are formed on the outer periphery thereof.
a, 28b, 28c can be selectively used according to the type of the corrugated cardboard sheet 20. In this modification, the circumference of each projection 28a, 28b, 28c is preferably the length L between the grooves 50, 50 formed in the blank 21.
Although set as described above, it may be shorter than L as long as there is no problem in production. The male ruled roll 2 shown in FIG.
When using No. 8, a female ruled line roll 30 in which three types of corresponding concave portions are formed is used.

[0028]

[Modification] In the above-described embodiment and modified examples, the case where a plurality of concave portions are formed on the female ruled roll corresponding to the plurality of convex portions formed on the male ruled roll has been described. Alternatively, a single concave portion may be formed. In addition, the outer circumference of the female ruled line roll can be formed flat using a material made of soft urethane or rubber that can be elastically deformed, so that it can correspond to various convex portions. In the embodiments and the modified examples, the male ruled line roll is described as one ruled line roll, and the female ruled line roll is described as the other ruled line roll. That is, a combination of a male ruled line roll having a single convex portion formed thereon and a female ruled line roll having a plurality of concave portions formed according to the processing conditions of a corrugated cardboard sheet can be employed.

Further, three or more ruled line units shown in the above-mentioned modified example may be arranged in series along the supply line, or four or more convex portions and concave portions having different shapes and dimensions may be provided on the male ruled line roll and the female ruled line roll. It is also possible to form. Further, in the embodiments and the modified examples, the convex type or the concave type is given as an example of the rule type, but a flat type may be used, and the pair of rule types may be a convex type and a convex type, and a convex type and a flat type. , A combination of a flat type and a flat type, and a combination of a flat type and a concave type. In a configuration in which a plurality of rule forms are formed on one and the other rule rolls, it is not necessary to make the rule form of the one rule roll correspond to the rule form of the other rule roll. It is possible to

Further, in the embodiment, both the ruled line rolls are configured to rotate by transmitting the power from the line shaft in the printing press via the differential device, but the two ruled line rolls are rotated by independent motors. It may be. For example, a control signal corresponding to the processing conditions of the corrugated cardboard sheet is output from the control device to the motor, and the rotation of both ruled line rolls is controlled so as to use the corresponding convex portions and concave portions. In the embodiment, the case where the vertical rules 32 are formed at four positions of the blank 21 has been described. However, the vertical rules 32 can be formed only at the C position or the B position and the D position shown in FIG. That is, for example, it is possible to correspond to a specification in which the vertical rule 32 is formed only at a position (position B and position D) which is supplied to a post-process box making machine (folder gluer) and bent.

[0031]

As described above, according to the crease device according to the present invention, by forming a plurality of different creases on the outer periphery of one crease roll, the thickness, material,
A ruled pattern can be selected and used according to processing conditions such as basis weight, and a good ruled line can be reliably formed on each type of corrugated cardboard sheet. Therefore, the box making in the post-process is favorably performed, a beautiful box can be formed, and the ruled line crack at the ruled line portion can be suitably prevented. Further, since there is no need to replace the ruled line rolls when changing the order, the setup can be changed in a short time, and there is an advantage that the production capacity can be improved. Further, the structure is simple and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a ruler according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a flexo printer slotter employing the ruled line device according to the embodiment.

FIG. 3 is a control block diagram of the ruled line device according to the embodiment.

FIG. 4 is an explanatory diagram showing the relationship between the peripheral lengths of the convex portions and concave portions formed on both ruled line rolls of the ruled line device according to the embodiment and the lengths of the vertical ruled lines formed on the blank.

FIG. 5 is an explanatory diagram in a case where a vertical rule is formed on a thin corrugated cardboard sheet by the ruled line device according to the embodiment.

FIG. 6 is an explanatory diagram of a case where a vertical rule is formed on a thick corrugated cardboard sheet by the ruled line device according to the embodiment.

FIG. 7 is a schematic configuration diagram of a ruled line device according to a modified example of the present invention.

FIG. 8 is a schematic diagram showing a modified example of a male ruled line roll in the ruled line device of the present invention.

FIG. 9 is an explanatory diagram showing another relationship between the peripheral lengths of the convex portions and the concave portions formed on both the ruled line rolls of the ruled line device according to the embodiment and the lengths of the vertical ruled lines formed on the blank.

[Explanation of symbols]

 20 Corrugated cardboard sheet 28 Male ruled line roll (one ruled line roll) 28a First convex portion 28b Second convex portion 30 Female ruled line roll (the other ruled line roll) 30a First concave portion 30b Second concave portion 32 Vertical ruled line (ruled line) 34 Differential Device (rotation control means)

Claims (4)

[Claims] 1. A ruled line roll (28) and another ruled line roll (30), which are arranged facing each other up and down with a supply line for a corrugated cardboard sheet (20) therebetween, and both ruled line rolls (28, 30) are provided. In a crease device that forms a crease (32) parallel to a supply line on a corrugated cardboard sheet (20) supplied between the creaser, a plurality of creases having a plurality of different shapes in a circumferential direction are provided on an outer periphery of the one crease roll (28). (28a, 28b), and the crease pattern (2) according to the processing conditions such as the thickness, material, and basis weight of the corrugated cardboard sheet (20).
8 (a) and 28 (b) are selectively used to form ruled lines (32) on the sheet (20). 2. A crease pattern (28a, 2a) corresponding to a processing condition of the sheet (20) is provided at a position where a crease line is to be formed on the cardboard sheet (20).
2. The ruled line device according to claim 1, further comprising means (34) for controlling the rotation of one ruled line roll (28) so that 8b) arrives. 3. The ruled line device according to claim 1, wherein a single ruled shape or a plurality of ruled shapes (30a, 30b) are formed on the outer periphery of the other ruled line roll (30). 4. A plurality of ruled dies (2) formed on the outer periphery of the one ruled roll (28) on the outer periphery of the other ruled roll (30).
8a, 28b) and a plurality of ruled molds (30a, 30b) corresponding thereto, and the corrugated cardboard sheet (20) is provided with
Crease type of one crease roll (28) corresponding to the processing condition of (20)
(28a, 28b) and the crease type (30a, 30b) of the other crease roll (30)
2. The ruled line device according to claim 1, further comprising means (34) for controlling the rotation of one ruled line roll (28) and the other ruled line roll (30) such that the time comes.