JP2002331601A - Corrugating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrugating machine which can easily form breaking perforations in a high accuracy and which can improve the manufacturing efficiency of a corrugated fiberboard case. SOLUTION: The corrugating machine comprises a single facer 3 for laminating a corrugated core (b) on a rear liner (a) to form a single-faced corrugated fiberboard (c), a double facer 4 for laminating a front liner (d) on the fiberboard (c) to form a corrugated fiberboard (e), and a slitter-scorer 5 for cutting in a predetermined width size and forming a scoring line. The machine further comprises a liner cutter 10 for forming the breaking perforations at the fiberboard (e) along the conveying direction of the fiberboard (e) between the double facer 4 and the slitter-scorer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugating machine for producing a rectangular paperboard for forming a corrugated cardboard by laminating long liners and cutting the corrugated cardboard to form a corrugated cardboard box.

[0002]

2. Description of the Related Art As shown in FIG. 7, a perforation g for breaking is provided in a cardboard box h to facilitate the operation of opening a cardboard box containing contents. A tab i formed by an H-shaped cut is formed at the breaking start position of the breaking perforation g, and the tab i serves as a clue when the breaking perforation g is broken. In order to maintain the strength of the cardboard box h and maintain a good appearance, such a break perforation g is provided on the back liner a of the cardboard box e on the inner side of the cardboard box h as shown in FIG. It is preferable that only one is provided.

[0003] A corrugated cardboard box h of this type is manufactured by first producing a rectangular paperboard by a corrugating machine, and then printing and punching the paperboard formed by the corrugating machine.

The corrugating machine includes a single facer for forming a single-sided corrugated cardboard by laminating a stepped core b to a back liner a, a double facer for laminating a front liner to the single-sided corrugated cardboard to form a corrugated cardboard, A slitter scorer that cuts into a predetermined width while inserting, a cutter that cuts into a predetermined length to form a rectangular paperboard, and a stacker that stacks each paperboard at a predetermined dispensing position according to the shape of the paperboard goes from upstream to downstream. It is configured to be arranged.

Conventionally, it is known that the break perforation g is formed by a liner cut device provided in the single facer. According to this, the break perforation g can be formed only on the back liner before the back liner and the stepped core are bonded.

In the corrugating machine, as shown in FIG. 9, when the slitter scorer 50 cuts, it is necessary to accurately maintain the interval between the break perforation g and the cutting line j at a predetermined dimension y. is there. However, since the distance from the single facer to the slitter scorer 50 is relatively long, meandering occurs in a long corrugated cardboard, and it is difficult to perform accurate cutting while maintaining the predetermined dimension y. There are certain disadvantages.

[0007] In addition, a break perforation g is formed on corrugated paperboard discharged from a corrugating machine. In this case, it is known that the break perforation g is formed by a liner cut device provided in a printing machine for printing on paperboard.

However, the direction of conveyance of corrugated paperboard in this type of printing machine may be different from the direction of conveyance of corrugated cardboard in a corrugating machine. That is, generally, as shown in FIG. 8, the break perforations g are provided in a direction that intersects with the uneven strip direction of the core b, but the conveying direction of the corrugated paperboard in the printing machine is in the uneven strip direction of the core. Therefore, even if the break perforation g is formed along the transport direction, the break perforation g does not intersect with the uneven line direction of the core b. In this case, there is an inconvenience that a large-scale equipment change must be performed in order to match the transport direction of the printing press with the direction in which the break perforations g are formed.

A liner cutting device of this type is known, for example, as shown in FIG. 10, comprising a plurality of cutting blade rolls 25 and a plurality of support rolls 51 facing each cutting blade roll 25. ing. As shown in FIG. 11, each of the cutting blade rolls 25 has a plurality of cutting blades 27 protruding in a sawtooth shape in the radial direction along the circumferential direction, and the quantity is determined by the number of boxes taken in the width direction of the cardboard. Can be That is, when two corrugated cardboard boxes h shown in FIG. 7 are manufactured in a row (generally referred to as two-cutter), four sets of the pair of cutting blade rolls 25 are used as a single rotating shaft 52. Supported. Further, the rotating shaft 52 is driven so as to rotate each cutting blade roll 25 at a speed slightly higher than the passing speed of the cardboard. Note that the rotation speed of the rotating shaft 52 is set to
The speed is set to ensure the cut into the cut and maintain the discontinuous cut.

However, the degree of wear of the cutting blade rolls 25 of each set may vary, which may cause not only a difference in the peripheral speed of each cutting blade roll 25 but also a difference in the cutting depth into the back liner. With break perforation g
Is difficult to form reliably. In addition, since each of the cutting blade rolls 25 is driven to rotate by the single rotating shaft 52, there is a disadvantage that the peripheral speed of each cutting blade roll 25 and the amount of cutting into the back liner a cannot be individually adjusted. Further, when the number of boxes in the width direction of the cardboard is changed, a large-scale replacement operation of the cutting blade rolls 25 must be performed in order to make the number of the cutting blade rolls 25 correspond to the changed number of boxes. Therefore, there is a disadvantage that the production efficiency of the cardboard box is reduced.

[0011]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a corrugating machine capable of easily forming a high-precision break perforation and improving the production efficiency of a cardboard box. The purpose is to provide.

[0012]

In order to achieve the above object, the present invention provides a single facer for forming a single corrugated cardboard by laminating a stepped core to a back liner, and a front liner on the single corrugated cardboard. In a corrugating machine including a double facer that is pasted to form a corrugated cardboard, and a slitter scorer that cuts to a predetermined width and forms a crease ruler, a conveying direction of the cardboard is between the double facer and the slitter scorer. A liner cut device for forming a break perforation in at least one liner of the cardboard along the line.

According to the present invention, since the liner cutting device is provided between the double facer and the slitter scorer, a break perforation can be formed at a position relatively close to the slitter scorer. Therefore, it is possible to reduce the adverse effect of the meandering of the conveyed cardboard, and improve the accuracy of the forming position of the break perforation. Moreover, unlike the case where a break perforation is formed by a conventional printing machine or the like, only the break perforation is formed along the cardboard transport direction, and the direction intersects with the uneven line direction of the center of the cardboard. Can be provided with a perforation for breaking.

Further, in the present invention, the liner cutting device has a plurality of cutting blades protruding in a sawtooth shape in a radial direction all around, and a disk-shaped cutting device capable of moving back and forth in a direction of cutting the cutting blades into the cardboard. A gap between the cutting blade roll and the support roll is adjusted by moving the cutting blade roll, the support roll facing the cutting blade roll to receive the corrugated cardboard, and the cutting blade roll toward the support roll. Adjusting means.

According to the present invention, for example, when the distance between the cutting blade roll and the support roll becomes large due to the wear of the cutting blade roll, the distance between the cutting blade roll and the support roll is adjusted by the adjusting means. Can be properly adjusted. This makes it possible to prevent incomplete cutting due to wear of the cutting blade roll, and to reliably form a break perforation.

Further, in the present invention, the liner cutting device comprises a plurality of the cutting blade rolls and the adjusting means at predetermined intervals in a direction orthogonal to the direction of conveying the corrugated cardboard. It is characterized by comprising a separation driving means for selectively separating from a cutting position to the cardboard.

The corrugated cardboard manufactured in the corrugating machine is formed to have a width that allows a plurality of boxes to be taken out. At this time, a plurality of cutting blade rolls are provided at predetermined intervals according to the number of boxes to be taken. In this case, by providing the adjusting means for each of the cutting blade rolls, even if the wear of each cutting blade roll varies, it is possible to appropriately adjust the distance between the support roll and each of the cutting blade rolls. Can be. Further, by providing the separation driving means,
For example, only cutting blade rolls that are no longer needed due to the change in the number of boxes can be separated from the cardboard and retracted. Thereby, it is possible to cope with a change in the number of boxes to be taken without making a large-scale equipment change, and it is possible to improve the production efficiency of the cardboard box,
An increase in cost can be prevented.

Further, in the present invention, the liner cutting device is characterized in that the liner cutting device is provided with a plurality of rotation driving means for rotating each cutting blade roll at an individual peripheral speed. Thereby, even if the degree of wear of each cutting blade roll varies, the peripheral speed according to the wear can be individually driven, so that a high-precision break perforation can be formed.

Further, in the present invention, the liner cutting device is provided with each cutting blade roll so as to be able to traverse in a direction perpendicular to the direction of conveying the corrugated cardboard, and with a traverse means for traversing each cutting blade roll. It is characterized by the following. Thus, for example, the cutting position of each cutting blade roll can easily correspond to a change in the formation position of the break perforation due to a change in the number of boxes to be taken. Thereby, it is possible to cope with a change in the number of boxes to be taken without making a major change in equipment.

In the present invention, a thickness detecting means for detecting a thickness dimension of a corrugated cardboard is provided between the double facer and the liner cutting device, and the liner cutting device moves the support roll in a direction of the cutting blade roll. The apparatus is characterized in that it is provided so as to be able to advance and retreat, and is also provided with an advance and retreat driving means for moving the support roll forward and backward in accordance with the size detected by the thickness detecting means. For example, when the thickness of the corrugated board is changed due to a change in the corrugated board standard manufactured by the corrugating machine or the like, the thickness of the corrugated board is detected by the thickness detecting means, and the support roll is moved by the advance / retreat driving means based on the detection result. Let go. Thus, even if the thickness of the corrugated board changes, the guide position of the corrugated board by the support roll can be accurately maintained in accordance with the change, so that the cutting amount of the cutting blade roll into the corrugated board guided by the support roll can be adjusted. Can be performed very easily.

[0021]

An embodiment of the present invention will be described with reference to the drawings. 1 is a schematic configuration diagram showing a corrugating machine of the present embodiment, FIG. 2 is an explanatory diagram showing a configuration of a liner cutting device, FIG. 3 is a cross-sectional explanatory diagram taken along the line III-III of FIG. 2, and FIG. FIG. 5 is a cross-sectional explanatory view taken along line IV-IV of FIG. 3, and FIG. 6 is an explanatory view showing a rotation driving means of the cutting blade roll.

In FIG. 1, reference numeral 1 denotes a corrugating machine according to the present embodiment, which is a single-faced corrugating machine in which a back liner a and a core b supported by a plurality of mill roll stands 2 are laminated to form a single corrugated cardboard c. And a double facer 4 for bonding a front liner d to the single cardboard c to form a cardboard e. Downstream of the double facer 4, there is provided a slitter scorer 5 for cutting the corrugated cardboard e into a predetermined width while making a fold line. Downstream of the slitter scorer 5, the corrugated cardboard e is cut into a predetermined length to form a rectangular paperboard f. The cutter 6 is provided. Further, downstream of the cutter 6, there is provided a stacker 7 for stacking each paperboard f at a predetermined payout position according to the shape of the paperboard f.

Then, the corrugating machine 1 of the present embodiment
1, a corrugated cardboard thickness detecting unit (thickness detecting means) 8, a rotary shear 9, and a liner cutting device 10 are provided between the double facer 4 and the slitter scorer 5 in this order from the upstream side.

The liner cutting device 10 forms a perforation for breaking (see g in FIG. 8) on the back liner a of a long corrugated cardboard e conveyed from the double facer 4. The liner cutting device 10 is described in detail in FIG.
As shown in FIG. 1, a pair of frames 11 erected on both sides are provided with rectangular beams 12. As shown in FIGS. 2 and 3, a movable base 14 slidable along the width direction of the cardboard e is attached to the beam 12 by a guide member 13 such as a linear way. In addition, in FIG.
Although only one is shown, in practice, for example, if a maximum of three catches are to be performed, six movable tables 14 are provided.

As shown in FIGS. 2 and 4, the moving table 14 is provided with a motor 15 (laterally moving means), and as shown in FIG. ing. The pinion 16 meshes with a rack 17 provided on the beam 12, and the motor 15 rotates to move the movable table 14 in the width direction.

A support member 18 is fixed to the moving table 14, and as shown in FIG.
9 is rotatably supported. A spline cylinder 20 is fixedly mounted in the intermediate cylinder 19 via a key (not shown). The spline cylinder 20 meshes with a spline shaft 21 provided between the frames 11 (shown in FIG. 2). As shown in FIG. 2, one end of the spline shaft 21 is connected to a rotation shaft of a motor 22. Although not shown in detail, the motor 22 is configured so that the speed can be appropriately set to a speed different from the transport speed of the cardboard e. As shown in FIG. 5, a drive sprocket 23 is attached to one end of the intermediate cylinder 19.

On the outer periphery of the intermediate cylinder 19, an arm 24 is provided.
Is swingably mounted. A support shaft 26 of a pair of cutting blade rolls 25 is rotatably attached to the other end of the arm 24. The cutting blade roll 25 is the same as that described in the section of the prior art, and includes a plurality of cutting blades 27 projecting in a saw blade shape over the entire outer circumference as shown in FIG. A pair of cutting blade rolls 25 are supported by an arm 24 to form a knife head 28. A driven sprocket 29 is attached to an end of the support shaft 26. The driven sprocket 29 is connected to the driving sprocket 23 via a chain 30, and the spline shaft 2
One rotational driving force is transmitted to the knife head 28.

As shown in FIG. 3, an adjusting means 31 for finely adjusting the cutting amount of the knife head 28 is provided on the moving table 14.
Is provided. The adjusting means 31 includes a mounting table 33 which is guided by a guide member 32 such as a linear way provided on the moving table 14 and slides up and down, and a screw shaft 34 connected to a rotating shaft provided on the moving table 14. And a screw member 36 provided on the mounting base 33 and screwed to the screw shaft 34. Thus, the mounting base 33 moves up and down by rotating the motor 35. An air cylinder 37 is mounted on the mounting base 33, and a rod 38 thereof is connected to a tip of the arm 24. Therefore, the arm 24 swings with the expansion and contraction of the rod 38 of the air cylinder 37. The air cylinder 37
Constitutes the separation driving means of the present invention.

Also, as shown in FIG.
Below 8, a support roll 39 is provided.
The support roll 39 is rotatably supported by an eccentric wheel 40 rotatably supported by the frame 11. Gears 41 are provided at both ends of the eccentric wheel 40, and are rotatably driven by a motor 43 (forward / backward drive means) via an intermediate gear shaft 42. That is, when the motor 43 is rotated, the eccentric wheel 40 is rotated, and the support roll 39 moves up and down. The support roll 39 is driven to rotate at substantially the same speed as the transport speed of the corrugated cardboard e by a drive system (not shown) for driving the entire corrugating machine 1 or a single drive motor.

As shown in FIG. 1, a guide roll 44, which is driven at substantially the same speed as the corrugated cardboard e, is provided near the upstream side of the support roll 39 and cooperates with the support roll 39. Is kept stable.

The cardboard thickness detecting unit 8 is shown in FIG.
As shown in FIG. 7, a pair of laser displacement gauges 45 and 46 vertically facing each other via a conveyed cardboard e are provided. The thickness detecting unit 8 is configured such that the upper displacement meter 45
The surface position of the back liner a is measured, and the displacement meter 46 at the same time measures the surface position of the front liner d of the cardboard e to detect the thickness of the cardboard e from the difference from the reference value. I have.

Next, the operation of the liner cutting device 10 in the corrugating machine 1 of the present embodiment will be described. Referring to FIG. 2, first, the motor 15 is driven to
Is traversed along the guide member 13 so that the knife head 28
Is moved to a predetermined processing position. Next, the air cylinder 3
7 is extended, and the knife head 28 is lowered (this position is referred to as an operating position). At this time, if there is an unnecessary knife head 28 due to the number of cardboard boxes to be picked up, the knife head 28 is made to stand by at an ascending position (this is a stand-by position).

Next, at this time, if the gap x between the tip of the cutting blade roll 25 and the support roll 39 is not appropriate at the operating position, the motor 35 of the adjusting means 31 is driven to finely adjust the position of the air cylinder 37. The adjusting means 31
Since fine adjustment can be performed for each knife head 28, even if the cutting blade roll 25 is worn, the gap x can be appropriately adjusted according to the degree of wear.

Subsequently, the knife head 28 is driven to rotate,
The conveyance of the cardboard e (shown in FIG. 1) is started. At this time, the speed difference between the conveyance speed of the cardboard e and the rotation speed of the cutting blade roll 25 can be set to a suitable speed difference by controlling the rotation of the drive motor 22.

Referring to FIG. 1, when the thickness of the cardboard box e is changed due to an order change or the like, the thickness of the cardboard box is detected by the thickness detecting unit 8. Then, as shown in FIG. 2, the support roll 39 is moved up and down by the rotation of the motor 43,
The gap x with respect to the knife head 28 can be adjusted appropriately.

In the present embodiment, as shown in FIG. 3, the cutting blade roll 25 of the knife head 28 is rotated by the transmission of the driving force of the motor 22 by the spline shaft 21. As shown in FIG. 6, a rotating shaft of a motor 47 may be connected to the supporting shaft 26 of the knife head 28. At this time, the motor 47 is supported by the arm 24 via the support member 48. According to this, the plurality of knife heads 28 can be individually driven to rotate by the respective motors 47. Thus, the cutting blade roll 25 of each knife head 28 can be rotated at a rotation speed according to the degree of wear, and a highly accurate break perforation g can be reliably formed.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram illustrating a configuration of a liner cutting device.

FIG. 3 is an explanatory sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an explanatory sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a cross-sectional explanatory view taken along line VV of FIG. 3;

FIG. 6 is an explanatory view showing a rotation driving unit of the cutting blade roll.

FIG. 7 is a plan view showing the cardboard box in an unfolded state.

FIG. 8 is a sectional view of a cardboard.

FIG. 9 is a diagram illustrating the operation of a slitter scorer.

FIG. 10 is an explanatory view showing a configuration of a conventional liner cutting device.

FIG. 11 is an explanatory view showing a part of a cutting blade roll.

[Explanation of symbols]

a: Back liner, b: Middle core, c: Single corrugated cardboard, d: Front liner, e: Corrugated cardboard, g: Perforation for breaking, 3: Single facer, 4: Double facer, 5: Slitter scorer, 1: Corrugating machine , 8 ... thickness detection unit (thickness detection means), 10 ... liner cut device, 15 ... motor (lateral movement means), 22, ... motor (rotation drive means), 25
... cutting blade roll, 27 ... cutting blade, 31 ... adjusting means, 37 ... air cylinder (separation driving means), 39 ... support roll,
43 ... motor (forward / backward drive means).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sadao Matsumoto 1240-12 Kokuwabara-cho, Tatebayashi-shi, Gunma (72) Inventor Goji 1-1 1-1 Kotobukicho, Mihara-shi, Hiroshima Prefecture Inside Rishiju Mihara Engineering Co., Ltd. (72) Inventor Masahisa Takahashi 1-1-1, Kotobuki-cho, Mihara-shi, Hiroshima Pref. Inside Mihara Rishige Engineering Co., Ltd. (72) Inventor Yasuhiro Ito 15-1 Tomikucho, Shinjuku-ku, Tokyo Terms (reference) 3E078 AA20 BB03 CC61 CE02

Claims (6)

[Claims] 1. A single facer for laminating a stepped core to a back liner to form a single cardboard, and a double facer for laminating a front liner to the single cardboard to form a cardboard.
A corrugating machine having a slitter scorer that cuts to a predetermined width and forms a crease ruler, between the double facer and the slitter scorer,
A corrugating machine provided with a liner cutting device for forming a break perforation in at least one liner of the cardboard along the conveying direction of the cardboard. 2. A disk-shaped cutting blade roll having a plurality of cutting blades protruding like saw blades in a radial direction on the entire circumference, and capable of moving forward and backward in a direction of cutting the cutting blades into the corrugated cardboard. A support roll for receiving the cardboard facing the cutting blade roll; and adjusting means for adjusting a distance between the cutting blade roll and the support roll by moving the cutting blade roll toward and away from the support roll. The corrugating machine according to claim 1, further comprising: 3. The liner cutting device is provided with a plurality of the cutting blade rolls and the adjusting means at predetermined intervals in a direction orthogonal to a cardboard conveying direction, and attaches each cutting blade roll to the corrugated cardboard. 3. The corrugating machine according to claim 2, further comprising a separation driving means for selectively separating the cutting position from the cutting position. 4. The corrugating machine according to claim 3, wherein said liner cutting device includes a plurality of rotation driving means for rotating each of the cutting blade rolls at an individual peripheral speed. 5. The liner cutting device according to claim 1, wherein each of the cutting blade rolls is provided so as to be able to traverse in a direction orthogonal to the direction of conveying the corrugated cardboard, and is provided with traversing means for traversing each cutting blade roll. The corrugating machine according to claim 3 or 4, wherein 6. A thickness detecting means for detecting a thickness dimension of a corrugated cardboard is provided between the double facer and the liner cutting device, and the liner cutting device is provided with the support roll so as to be able to advance and retreat in the direction of the cutting blade roll. The corrugating machine according to any one of claims 2 to 5, further comprising an advancing / retreating drive means for advancing / retreating the support roll in accordance with a size detected by the thickness detection means.