JP2001096643A - Rule giving device for corrugated fiberboard case manufacture machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately bend and to produce a corrugated fiberboard case having a high accuracy by working a corrugated fiberboard sheet with a suitable pressure to its rule. SOLUTION: The rule giving device for a corrugated fiberboard case manufacturing machine comprises a slotter knife provided at a slotter holder, and a rule giving member for giving a rule to a corrugated fiberboard sheet on a circumferential surface except the knife of the holder. Thus, the sheet is grooved by the knife of the slotter, and a rule giving pressure is applied when the sheet is passed through the slotter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ruled line applying apparatus in a cardboard box making machine for applying a bending line to a cardboard sheet.

[0002]

2. Description of the Related Art As shown in FIG. 7, a cardboard box making machine 1 converts a cardboard sheet S loaded on a sheet feeding table 3 of a sheet feeding unit 2 into a downstream feed roll 4 by a sheet feeding member such as a kicker (not shown). 5 and sent to the printing unit 6. Generally, at least two printing units 6 are provided, and each of the printing units 6a and 6b performs desired printing. The printing units 6a, 6b are provided with press cylinders 8a, 8b arranged at positions opposite to the printing cylinders 7a, 7ab around which a desired printing plate (not shown) is wound, with the paper line PL interposed therebetween. The desired printing is performed on the cardboard sheet S by passing the cardboard sheet S between the printing cylinders 7a and 7b and the press cylinders 8a and 8b. The printing units 6a and 6b are provided with anilox rolls 9a and 9b for applying ink to a printing plate (not shown) wound around the printing cylinders 7a and 7b, and rubber rolls 10a and 10b. Subsequently, the printed cardboard sheet S is sent to the cleaner unit 11, and the cleaner rolls 12 and 13 of the cleaner unit 11 are moved.
Thus, a ruled line for bending the cardboard sheet S is provided at a desired position. Then, it is sent to the slotter unit 14 and the slotters 15, 16, 1 in the slotter unit 14 are sent.
In steps 7 and 18, the corrugated cardboard sheet is subjected to grooving. The corrugated cardboard sheet S is then bent by a folder gluer (not shown) connected to the downstream side of the cardboard box making machine 1 or is piled up by a stacker or the like (not shown), and a folder gluer (not shown) which is separately installed. To be boxed.

[0003]

As shown in FIG. 6, a corrugator ruled line (score) 21 which is provided at a right angle to the corrugation of the corrugated cardboard sheet S by a corrugator (not shown) as shown in FIG. There are two types of corrugated cardboard box creasing lines (crees) 20 applied in parallel to the corrugations of the corrugated cardboard sheet S by the corrugated box box making machine 1. However, the corrugated cardboard box creasing line 20 has an important element for forming the box when the corrugated cardboard sheet S is folded into a box shape by a folder gluer or the like for bending the cardboard sheet S.
In other words, if the corrugated cardboard sheet S is correctly given the corrugated cardboard box making ruled line 20 by the creaser unit 11, one side of the corrugated cardboard sheet S is folded as shown in FIG. The glue allowance 22 molded at the end is stuck at an appropriate position on the other side,
The gap t formed in the overlapping portion is a gap t having substantially the same width as the slotter groove 19 formed by the slotter 14.

However, the conditions of the corrugated cardboard sheet are different for each production order depending on the flute, paper quality, etc., and only one type of the creasers 12, 13 passes through the corrugated cardboard sheet having these conditions at high speed instantaneously. It has been difficult to correctly apply the corrugated cardboard ruled line 20 having an appropriate pressure to the corrugated cardboard sheet S. That is, if a sufficient ruled line is provided when bending the corrugated cardboard sheet, the bending process can be easily performed at the position of the ruled line portion 20 without a large load. However, since a sufficient ruled line is not provided, a large load is applied at the time of bending. And bending at the correct position where it should be bent cannot be performed, resulting in bending as shown in FIG.
When a large bending load is applied to a folder gluer (not shown), resistance to the corrugated sheet progresses, and the bent portion is delayed, as shown in FIG. 6C.

In FIG. 6 (b), the gap t1 is wider than the gap t having an appropriate width, so that the box has a small overlap portion of the glue margin 22. In FIG. 6C, the gap t2 is extremely wide on one side with respect to the appropriate gap t.
When the overlapping portions of the glue allowance 22 are stuck to each other diagonally, a box cannot be formed or a distorted box is formed. These are due to the fact that the corrugated board making machine ruled line 20 was not correctly applied to the corrugated board sheet S at an appropriate pressure. Although the elementary problem may be due to the wrong clearance value between the creaser rolls 12 and 13 of the creaser unit 11, the creaser of the creaser unit 11 does not respond to the difference in the type of the corrugated cardboard sheet S and the paper quality. The rolls 12 and 13 alone may not provide the corrugated cardboard box creasing line 20 at an appropriate pressure. Further, since only one unit of the creaser unit 11 is provided in the cardboard box making machine 1, if the cardboard sheet S has a strong paper quality, sufficient ruled lines are provided to the cardboard sheet S only by applying a single ruled line. You may not be able to do it.

[0006]

An object of the present invention is to provide a corrugated cardboard sheet S with a corrugated cardboard box ruler at an appropriate pressure.
It is an object of the present invention to provide a box having a high strength as well as being formed into a correct box as the dimensions when folded into a box shape.

[0007]

Means to Solve the Problems To overcome the above problems,
In order to suitably achieve the intended purpose, the present invention relates to a grooving device for a cardboard box making machine which is arranged to face up and down with respect to a corrugated sheet feeding line, wherein at least one slotter holder of the grooving device is provided. A plurality of slotter knives are provided on the circumference, and a pressing member for pressing the corrugated cardboard sheet at the same width direction position on the same circumferential surface as the slotter knife is provided. It is a ruled line giving device.

Further, in a grooving device of a corrugated box making machine which is arranged facing up and down with respect to a corrugated sheet feeding line, two slotter knives are provided on a circumference of a slotter holder of the grooving device. And a pressing member for pressing the corrugated paperboard sheet at the same widthwise position on the same circumferential surface between the two slotter knives while being sandwiched between the two slotter knives. It is.

Further, in a grooving device of a corrugated box making machine which is opposed to each other in a vertical relationship with a corrugated sheet feeding line interposed therebetween, one slotter knife is circumferentially provided with a slotter holder of the grooving device. Are provided on the upstream side and the downstream side of the corrugated paperboard (S) feed line, respectively, and press the corrugated paperboard to the same circumferential position on the same circumferential surface as the slotter knife. This is a ruled line applying device in a cardboard box making machine, wherein a pressing member is provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. FIG. 1 is a side view showing a ruled line applying device in a cardboard box making machine according to the present invention, and discloses a configuration comprising a so-called double slotter in which two sets of slotters are provided in a slotter unit 11. First upper and lower slotters 15 and 16 are provided on the upstream side of the slotter unit 11, and second upper and lower slotters 17 and 18 are provided on the downstream side. First, the configuration of the first upper and lower slotters 15 and 16 will be described.

The first upper and lower slotters 15 and 16 are provided with an upper slotter holder 37 sliding on the slotter shaft 25 and a lower slotter holder 38 sliding on the slotter shaft 26 with the paper line PL interposed therebetween. The upper slotter knife 37 is provided in the upper slotter holder 37, and the upper slotter knife 29 is provided in the lower slotter holder 38 so as to enter and mesh between the lower slotter knives 30a and 30b. Upper slotter knife holding rings 41 a and 41 b are attached to the upper slotter holder 37 by bolts 47 so as to sandwich the upper slotter knife 29 from both sides. The lower slotter knives 30a and 30b are attached to the lower slotter holder 38 by bolts 48 so as to sandwich the upper slotter knife receiving member 45 in a gap into which the upper slotter knife 29 enters. The peripheral length of the upper slotter knife 29 is arbitrary, but generally, a slotter knife of a minimum necessary peripheral length from the maximum paper passing size processed by the cardboard box making machine 1 is attached. Therefore, when grooving a special corrugated cardboard sheet exceeding the range of a normal corrugated cardboard sheet, the slotter knife may be additionally attached depending on the processing conditions. The lower slotter knife 30 is provided in accordance with the circumference of the upper slotter knife 29. Upper slotter knife holding ring 41a, 4 attached to upper slotter holder 37
1b and the lower slotter knives 30a and 30b are tapered so that the corrugated cardboard sheet S is sandwiched and grooved. Note that the upper slotter knife holding rings 41a, 41b and the lower slotter knife 30a,
The outer diameter of 30b is the same, and the cardboard sheet S is sandwiched from above and below with a uniform force.

The upper slotter knife 29 has an outer diameter such that the upper slotter knife 29 enters the lower slotter knife 30 so as to cut the corrugated cardboard sheet S when engaged with the lower slotter knife 30 as shown in FIG. However, the center diameter of the upper slotter knife 29 in the width direction is smaller than the center diameter at both ends. Also, the lower slotter knife 30a, 3
The lower slotter knife receiving member 45 sandwiched between the upper slot 0b and the lower slotter knife receiving member 45 is formed to have a convex central portion in the width direction so as to sandwich and remove the slot waste Ss grooved by the upper and lower slotter knives 29 and 30. Has become.

In the first upper and lower slotters 15 and 16, the outer peripheral portions other than the upper and lower slotter knives 29 and 30 have the following configuration. FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1. The upper slotter 15 is attached to the slotter holder 37 with bolts 47 by pinching the top crushed line member 33 between the holding rings 41 a and 41 b. Upper crush ruled line member 33
Are located in the same width direction as the upper slotter knife 29. The lower slotter 16 is provided with a lower crushed ruled line member 34 at a position facing the upper crushed ruled line member 33 across the paper line PL on the circumference of the press ring 42. Top crush ruled line member 3
3 and the lower crush ruled line member 34 have the same diameter, and the cardboard sheet S
Is configured to be uniformly pressed from both sides. Note that the crushed ruled line members 33 and 34 are attached to the slotter holder 37,
The slotter knives 29, 30 may have any peripheral length around the attachment of the slotter knives 29, 30, but preferably the slotter knives 29, 30 on the slotter holders 37, 38.
Is preferably provided on the entire circumference other than the attached length.

Next, the configuration of the second upper and lower slotters 17, 18 will be described. However, the slotter holders 39 and 40 sliding on the slotter shafts 27 and 28 and the upper and lower slotter knives 3 provided on the slotter holders 39 and 40 are provided.
1 and 32 and the holding ring 43 and the like that constitute them are the slotter knives 2 of the first upper and lower slotters 15 and 16.
Since the configuration is exactly the same as that of 9, 30, etc., the description thereof is omitted, and only the configuration other than the slotter knives 31, 32 will be described.

In the second upper and lower slotters 17 and 18, the outer peripheral portions other than the upper and lower slotter knives 31 and 32 have the following configuration. FIG. 4 is a cross-sectional view taken along the line CC of FIG. 1. The upper slotter 17 is attached to the circumference other than the slotter knife 31 with the slotter holder 39 by holding the upper cleaner 35 between the holding rings 43 a and 43 b and using the bolt 47. The upper ruled line member 35 is located in the same width direction as the upper slotter knife 29. The lower slotter 16 has a holding ring 44
The upper ruled line member 35 with the paper line PL interposed on the circumference of
The lower ruled line member 36 is provided at a position opposed to. The upper ruled line member 35 and the lower ruled line member 36 have the same diameter, and are configured so that ruled lines can be uniformly applied to the corrugated cardboard sheet S from both sides. The ruled line members 35 and 36 are attached to the slotter holder 3.
Although a configuration having an arbitrary peripheral length around the slotter knives 31 and 32 on the slots 9 and 40 may be adopted, preferably, the slotter knives 31 and 32 are set on the slotter holders 39 and 40.
It is preferable to be provided on the entire circumference except for where 32 is attached.

The slotter holders 37, 38, 39,
The crushing ruled line members 33 and 34 and the ruled line members 35 and 36 provided on the slot 40 are the slotter knives 29 and 3 described above.
With the extension of 0, 31, 32, the slotter holders 37, 38, 39, 40 can be arbitrarily removed.

Next, the use of the preferred embodiment according to the present invention in the above configuration will be described. First, in the cardboard box making machine 1 shown in FIG. 7, a cardboard sheet S placed on the sheet feeding table 3 of the sheet feeding unit 2 is fed into the inside of the cardboard box making machine by a sheet feeding member (not shown). . Desired printing is performed on the cardboard sheet S by the printing unit 6, and ruled lines are formed at desired positions by the cleaner unit 11. Subsequently, when sent to the slotter unit 14, the first upper slotter knife 29 and the first lower slotter knife 29 shown in FIG. The groove cutting process 19 is performed by the slotter knife 30. When the cardboard sheet S further advances, the slotter knives 29,
The corrugated cardboard sheet S reaches the circumferential surface other than 30, and the circumferential surfaces of the first slotter holders 37, 38 of the first slotters 15, 16 as shown in FIG.
The crushing line members 33 and 34 perform crushing line processing 49 on the extension of the grooved portion 19 formed on the corrugated cardboard sheet S.

Subsequently, the cardboard sheet S reaches the second slotters 17, 18. In the second slotters 17, 18, the rear end portion of the cardboard sheet S (downstream in the sheet flow direction)
, The corrugated cardboard sheet S comes into contact with the circumferential surfaces of the second slotters 17 and 18 other than the slotter knives 31 and 32. Upper and lower ruled line members 35, 36 as shown in FIG. 4 are provided on the circumferential surfaces of the slotter holders 39, 40 of the second slotters 17, 18, and the first slotters 15, 16 are provided by the ruled line members 35, 36. As shown in FIG. 5 (b), a ruled line processing 50 as shown in FIG. This ruled line processing 50 is the first slotter 15,
It is desirable that the pressing be performed at the center in the width direction of the crushed portion 49 processed by the 16 crushed ruled line members 33 and 34. When the corrugated cardboard sheet S further advances, the slotter knives 31 and 32 of the second slotters 17 and 18 interfere with the corrugated cardboard sheet S and groov at a desired position at the rear end portion (downstream in the sheet flow direction) of the corrugated cardboard sheet S. Processing is performed to obtain a shape as shown in FIG.

By performing the above-described processing, a normal crease is formed by the creaser unit 11 and then a groove is formed by the slotter unit 14. Then, the crushed crease processing and the second crease processing are performed at that time. Therefore, the corrugated cardboard sheet S is reliably provided with a ruled line required for bending, and when the corrugated cardboard sheet S is bent by a folder gluer or the like (not shown) in the downstream process, the crushed ruled line portion 49 is formed by the ruled line portion 50. It plays an auxiliary role of bending, and can be reliably bent at the position of the ruled line 50 provided on the corrugated cardboard sheet S without a large load. Therefore, the glue allowance 22 is attached to the other end of the cardboard sheet S at a proper position.

In the above description, the slotter holder 37,
Slotter knives 20, 30, 31, 38, 39, 40
Although the embodiments of the so-called double-slotter type in which one slot 32 is provided have been described, the present invention is not limited to the double-slotter type, but the so-called single-slotter type slotter in which two slotter knives are provided in the slotter holder. Can also be applied to In this case, attach two slotter knives to the slotter holder.
If a ruled line member or a crushed ruled line member is provided between the slotter knives, the creaser unit 1 for the corrugated cardboard sheet S is provided.
A ruled line different from the ruled line provided in 1 is provided, and a sufficient ruled line processing for folding the cardboard sheet S can be performed.

[0021]

As described above, the ruled line applying apparatus for a cardboard box making machine according to the present invention can reliably and accurately apply a ruled line to any flute, paper quality and special corrugated cardboard sheet with an appropriate ruled line pressure. Therefore, since the bending process can be performed accurately at the position where it should be bent, the glue margin is securely bonded to the other end of the corrugated cardboard sheet. Thereby, the bonding defect of the paste margin is eliminated. Furthermore, since no load is applied to the bending even if the bending process is performed with a folder gluer or the like, there is no shift due to a delay in a bent portion of the corrugated cardboard sheet as it progresses in the folder gluer, and when a box shape is formed. It is no longer impossible to form a box.

Furthermore, even when a so-called corrugated cardboard sheet in which the slotter knife does not perform grooving in the slotter is passing through the inside of the slotter, the cardboard sheet is gripped by the circumferential surface other than the slotter knife. This eliminates sheet conveyance deviation and fluttering of the corrugated cardboard sheet in the machine, which leads to reduction of vibration and noise and improvement of the working environment for the operator.

[Brief description of the drawings]

FIG. 1 is a side view suitably showing a slotter and a cleaner of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a sectional view taken along the line CC in FIG.

FIG. 5 is a plan view of a corrugated cardboard sheet showing a state in which a ruled line is applied to the corrugated cardboard sheet according to the present invention.

FIG. 6 is a diagram showing a folded state of a corrugated cardboard sheet.

FIG. 7 is a diagram showing a general cardboard box making machine.

[Explanation of symbols]

1 Cardboard Box Making Machine 14 Slotter Unit 15 First Upper Slotter 16 First Lower Slotter 17 Second Upper Slotter 18 Second Lower Slotter 19 Slot Groove 20 Ruled Line 29 First Upper Slotter Knife 30 First Lower Slotter Knife 31 Second Upper Slotter Knife 32 2nd lower slotter knife 33 Upper crusher 34 Lower crusher 35 Upper creaser 36 Lower creaser 49 Flattened ruled line 50 Ruled line

Claims (18)

[Claims] 1. A feed line (P) for a corrugated cardboard sheet (S).
(L) a groover of a corrugated box making machine which is arranged facing up and down with respect to the slotter holder (37, 38, 39, 4).
0) with at least one slotter knife (29, 30,
And a pressing member (31, 32) for pressing the cardboard sheet (S) at the same circumferential position on the same circumferential surface as the slotter knife (29, 30, 31, 32). 33, 34, 35, 36)
A ruled line applying device in a cardboard box making machine, characterized in that: 2. The pressing member (33, 34, 35, 3)
6) The cardboard box making machine according to claim 1, wherein the slotter knife (29, 30, 31, 32) is provided on the entire circumference other than the portion where the slotter knife (37, 38, 39, 40) is attached. Ruled line giving device. 3. The pressing member (33, 34, 35, 3)
6) The cardboard box according to claim 1, wherein the slotter knife (29, 30, 31, 32) is provided with an arbitrary required peripheral length other than the portion where the slotter knife (29, 30, 31, 32) is attached to the slotter holder (37, 38, 39, 40). Ruler in the machine. 4. The pressing member (33, 34, 35, 3)
6) The ruled line applying apparatus in the cardboard box making machine according to claim 1, wherein the upper and lower pressing members (33, 34, 35, 36) have the same diameter. 5. The pressing member (33, 34, 35, 3)
6) is a position where a slotting process is performed on the corrugated cardboard sheet (S) with the slotter knife (29, 30, 31, 32) to provide a ruled line for folding the corrugated cardboard sheet (S) on an extension of the corrugated cardboard sheet passing direction. 5. The crease applying device in a cardboard box making machine according to claim 1, which is a member. 6. The pressing member (33, 34, 35, 3)
6) A crushed ruled line member that presses the cardboard sheet (S) with a slotter knife (29, 30, 31, 32) substantially flat on an extension of the cardboard sheet passing direction at a position where groove cutting is performed on the cardboard sheet (S). 5. A ruled line applying apparatus in the cardboard box making machine according to any one of 1 to 4. 7. The pressing member (33, 34, 35, 3)
7. A ruled line applying apparatus in a cardboard box making machine according to claim 1, wherein 6) is provided detachably with respect to the slotter holders (37, 38, 39, 40). 8. A feed line (P) for a corrugated cardboard sheet (S).
(L) a groover of a corrugated box making machine which is arranged facing up and down with respect to the slotter holder (37, 38, 39, 4).
0) and two slotter knives (29, 30, 31, 3)
2) is provided on the circumference, and the cardboard sheet (S) is placed at the same circumferential position on the same circumferential surface while being sandwiched between the two slotter knives (29, 30, 31, 32). Pressing member (33, 3) for pressing
(4, 35, 36) provided in a corrugated box making machine. 9. The pressing member (33, 34, 35, 3)
9. The ruled line applying apparatus in a cardboard box making machine according to claim 8, wherein the upper and lower pressing members (33, 34, 35, 36) have the same diameter. 10. The pressing member (33, 34, 35, 3)
6) is a position where a slotting process is performed on the corrugated cardboard sheet (S) with the slotter knife (29, 30, 31, 32) to provide a ruled line for folding the corrugated cardboard sheet (S) on an extension of the corrugated cardboard sheet passing direction. The ruled line giving device in the cardboard box making machine according to claim 8, which is a member. 11. The pressing member (33, 34, 35, 3)
6) A crushed ruled line member that presses the cardboard sheet (S) with a slotter knife (29, 30, 31, 32) substantially flat on an extension of the cardboard sheet passing direction at a position where groove cutting is performed on the cardboard sheet (S). 10. A ruled line applying device in a cardboard box making machine according to 8 or 9. 12. A grooving device of a corrugated box making machine which is disposed to face and face up and down with respect to a feed line (PL) of a corrugated cardboard sheet (S), wherein a slotter holder (37, 38, 39) of the grooving device is provided. , 4
0) each slotter knife (29, 30, 31,
32) on the circumference of the groove cutting device (15, 16, 1)
7, 18) to the cardboard sheet (S) feed line (PL)
And a pressing member for pressing the corrugated cardboard sheet (S) at the same circumferential position on the same circumferential direction as the slotter knife (29, 30, 31, 32). 33, 34, 35, 36)
A ruled line applying device in a cardboard box making machine, characterized in that: 13. The pressing member (33, 34, 35, 3)
6) The cardboard box making machine according to claim 12, wherein the slotter knives (29, 30, 31, 32) are provided on the entire circumference other than the portion where the slotter knives (37, 38, 39, 40) are attached. Ruled line giving device. 14. The pressing member (33, 34, 35, 3)
The cardboard box according to claim 12, wherein the slotter knife (29) is provided with an arbitrary required peripheral length other than the portion where the slotter knife (29, 30, 31, 32) is attached to the slotter holder (37, 38, 39, 40). Ruler in the machine. 15. The pressing member (33, 34, 35, 3)
6) The ruled line applying apparatus in the cardboard box making machine according to claim 12, wherein the upper and lower pressing members (33, 34, 35, 36) have the same diameter. 16. The pressing member (33, 34, 35, 3)
6) is a position where one of the upstream and downstream grooving devices performs grooving processing on the corrugated cardboard sheet (S) with a slotter knife, and forms a ruled line for folding the corrugated cardboard sheet (S) on an extension of the corrugated cardboard sheet passing direction. 16. The ruled line member to be applied, and the other is a crushed ruled line member that presses the cardboard sheet (S) with a slotter knife at a position where the corrugated sheet is grooved, and substantially flatly presses the cardboard sheet in the sheet passing direction extension line. Ruler in a corrugated box making machine. 17. The pressing member (33, 34, 35, 3)
6) is that the upstream side grooving device is a slotter knife (29,3).
0) is a ruled line member for providing a ruled line for folding the corrugated cardboard sheet (S) on an extension of the corrugated cardboard sheet in the paper passing direction at a position where the corrugated sheet is cut in the corrugated cardboard sheet (S). 17. The ruled line applying device in a cardboard box making machine according to claim 16, wherein the squeezing line member presses the cardboard sheet (S) at a position where the groove cutting process is performed on the cardboard sheet (S) substantially flatly on an extension of the cardboard sheet passing direction. 18. The pressing member (33, 34, 35, 3)
6) is the case where the downstream grooving device is a slotter knife (31, 3).
A ruled line member (35, 3) for providing a ruled line for bending the corrugated cardboard sheet (S) on a line extending in the cardboard sheet passing direction at a position where the corrugated sheet is grooved in 2).
6) and the upstream grooving device is a slotter knife (2)
9. A crushing ruled line member (33, 34) which presses substantially flatly on an extension of the corrugated cardboard sheet passing direction at a position where the corrugated sheet (S) is subjected to grooving processing at (9, 30).
7. A ruled line applying device in the cardboard box making machine according to 6.