JP2002234083A - Apparatus for drawing ruled line on corrugated board sheet and ruled line roll for apparatus for drawing ruled line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease flaws and crushes of a corrugated board sheet to the utmost while increase in cost is suppressed and to improve quality of the corrugated board sheet in relation to an apparatus for drawing ruled lines on the corrugated board sheet. SOLUTION: The first ruled line rolls 11 provided with a movable roll 1 which can be separated from and brought into contact with the corrugated board sheet 8 and a constantly contacting roll 2 which rotates while it is always brought into contact with the corrugated board sheet 8, the second ruled line rolls 12 provided adjacently to the first ruled line rolls 11 and provided with a movable roll 3 and a constantly contacting roll 4 which are similar to the first ruled line rolls 11 and a surface pressure decreasing means 5-7 for decreasing stress concentrations of the constantly contacting rolls 2 and 4 to the corrugated board sheet 8 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard sheet scoring device and a crease roll for the corrugated cardboard sheet, which process a crease line on the surface of a corrugated cardboard sheet in the course of manufacturing the corrugated cardboard sheet.

[0002]

2. Description of the Related Art Conventionally, in a corrugator for producing a corrugated cardboard sheet, a wide corrugated cardboard sheet continuously produced on a corrugator line is sent to a slitter scorer, and a narrow web having a predetermined width in a flow direction is produced by the slitter. (Usually a plurality of webs), and a scorer (a scoring device) applies a crease processing (also referred to as a crease) to make it easy to bend the corrugated cardboard sheet.

FIG. 10 is a schematic diagram showing a configuration of a general self-propelled slitter scorer. As shown in the figure, the slitter scorer is generally composed of two units arranged in the traveling direction of the corrugated cardboard sheet as indicated by M and N. One unit is in operation while the other unit is in operation. In order to change the lot, preparation work such as setting change is performed. Each of the units M and N has the same configuration, and in FIG. 10, the codes of the components of each unit are distributed to both units so that the codes of the components are not crowded. Arrows in FIG. 10 indicate the traveling direction of the cardboard sheet 8.

Each of the units M and N has an upstream ruler 65
And a downstream ruler 66 is arranged facing the frame 35 as a center. On the downstream side of each unit M, N,
A slitter 64 for cutting the cardboard sheet 8 in the traveling direction is provided, and the slitter 64 is paired so that the knife receiving table 33a and the slitter knife 33b sandwich the cardboard sheet 8. A trim duct 34 is provided immediately downstream of the slitter 64.

[0005] A plurality of sets of the upstream crease device 65, the downstream crease device 66, and the slitter 64 are provided in the width direction of the corrugated cardboard sheet 8 (in the case of 4-cutter, usually 8 sets of creases and 5 sets of slitters). Ruled line processing and cutting processing are performed. FIG. 11 is a plan view showing the state of ruled line processing and cutting, and shows an example of four cutting. As shown in FIG. 11, a frame 35 is fixed to frames 67 a and 67 b erected on both sides, and a rail 36 is fixed to the frame 35 in the width direction of the cardboard sheet 8. FIG.
The arrow in the middle indicates the traveling direction of the cardboard sheet 8.

As will be described in detail later, the heads 61 and 62 of the upstream crease device 65 and the downstream crease device 66 move along the rails 36 and can be set at any position in the width direction of the corrugated cardboard sheet 8. , And the slitter 64 can also be set to any position. Then, when the corrugated cardboard sheet 8 is introduced into the slitter scorer from the corrugator line, the upstream ruled line device 65 and the downstream ruled line device 6
At 6, each line is processed, cut in the running direction by the slitter 64, and sent to the next step.

At this time, a portion of the corrugated cardboard sheet 8 wider than a predetermined width, that is, ears at both ends is cut into a strip shape and is suction-processed by the trim duct 34. Note that the ruled line devices 65 and 66 are arranged in a zigzag pattern separately on the upstream side and the downstream side. As can be seen from FIG. 11, the interval between adjacent ruled lines is usually smaller than the interval of the slitter 64. This is because the interval between the ruled lines can be reduced without the adjacent ruled line devices 65 and 66 interfering with each other.

Next, the upstream ruler 65 and the downstream ruler 66 will be described in detail.
Since the structure and function are exactly the same except that a part of the ruler is configured to be opposing, the downstream ruler 66 will be described here. As shown in FIG. 10, the downstream crease device 66
The upper head 61 and the lower head 62 are configured as a pair in the vertical direction.

First, the configuration of the upper head 61 will be described. As shown in FIG. 10, a rail 36 is fixed to the frame 35 in the width direction of the cardboard sheet 8, and a frame 37 is slidably mounted on the rail 36.
An arm 39 is rotatably attached to a lower portion of the frame 37 by a pin 38. An upper ruled line roll 32a is attached to one end of the arm 39 by a pin 40.
Are mounted via bearings. A cylinder 4 is provided between the other end of the arm 39 and the frame 37.
The arm 39 rotates around the pin 38 by the expansion and contraction of the cylinder 41, and the upper ruled line roll 32a moves up and down.

A servo motor 42 is provided on the upper part of the frame 37.
When the servomotor 42 is driven to rotate, a drive gear 46 fixed to a nut 45 of a ball screw meshing with the screw shaft 44 rotates via the intermediate gear 43. Therefore, by rotating the servo motor 42 in the normal and reverse directions, the nut 45 of the ball screw rotates in the normal and reverse directions along the screw shaft 44 and the frame 37 is
The upper ruled line roll 32a can be set at an arbitrary position in the width direction on the corrugated cardboard sheet 8 by moving in the left-right direction (width direction) while sliding on the upper side.

Next, the configuration of the lower head 62 will be described. Frames 67a and 67b (FIG. 1)
1), a frame 47 is fixed as shown in FIG. A rail 48 is mounted on the frame 47 in the width direction of the cardboard sheet 8, and a frame 49 is slidably mounted on the rail 48. In the upper part of the frame 49, a hexagonal shaft 55 is rotatably attached to frames 67a, 67b erected on both sides, and a lower ruled line is attached to a bush 56 slidably attached to the hexagonal shaft 55. The roll 32b is fixed. The lower ruled line roll 32b is rotatably supported by a frame 49 via a bearing (not shown), and the hexagonal shaft 55 is also rotationally driven by a driving device (not shown), whereby the lower ruled line roll 32b is rotated.
b rotates.

The lower portion of the frame 49 is connected to a nut 52 of a ball screw via a bearing.
The nut 52 of the ball screw is connected to the frame 67a, 67b.
It is in mesh with the screw shaft 51 fixed between them. A drive gear 53 is fixed to one end face of the nut 52 of the ball screw. When the drive motor 54 is driven forward and backward, the drive gear 53 rotates in the forward and reverse directions via an intermediate gear. As a result, the frame 49 moves to an arbitrary position on the left and right along the screw shaft 51 while sliding on the rail 48.

Therefore, when performing the ruled line processing, the lower head 62 is moved to a predetermined position along the screw shaft 51 by the drive motor 54, and at the same time, the upper head 61 is also driven by the servo motor 42, whereby the screw is formed. The upper and lower ruled line rolls 32 are moved to predetermined positions along the axis 44.
The positions of a and 32b are matched. Then, the hexagonal shaft 55 is driven and rotated so that the peripheral speed of the lower ruled line roll 32b and the traveling speed of the corrugated cardboard sheet 8 become equal, and then the cylinder 41 is driven to appropriately move the upper ruled line roll 32a via the arm 39. The corrugated cardboard sheet 8 is pressed against the lower ruled line roll 32b with a small pressing force to perform ruled line processing.

The setting of a plurality of sets of the upper head 61 and the lower head 62 provided in the width direction of the corrugated cardboard sheet 8 is performed independently and simultaneously.
A plurality of ruled line processing can be performed simultaneously while maintaining a predetermined interval. The upper and lower ruled line rolls 32a and 32b are in contact with the corrugated cardboard sheet 8 at the leading end portions where the upper ruled line roll 32a is convex and the lower ruled line roll 32b is concave.

The upper and lower ruled line rolls 32a, 32
The fine size of the tip shape (cross-sectional shape) of b differs depending on the type of the corrugated cardboard sheet 8 supplied, and the upper and lower ruled line rolls 32a, 32b are optimally used for each type of corrugated cardboard sheet 8. It is ideal. here,
Such a ruled line roll (hereinafter, simply referred to as a ruled line roll without discriminating between upper and lower sides, a roll composed of upper and lower ruled line rolls)
A description will be given of the proper use of a set of ruled line rolls. Conventionally, heads 61 and 62 having a standard ruled line roll (ordinary ruled line roll) often used in normal times are attached to a ruled device, When processing different special ruled lines, the heads 61 and 62 are once removed, and each unit is replaced with a head having a ruled line roll (special ruled line roll) corresponding to the special ruled line.

[0016]

However, if the head is replaced each time a special ruled line is processed, the efficiency is low and the work load is large. Therefore, as shown in FIG.
Two sets of ruled line rolls with different specifications (ie,
It is conceivable to provide the normal ruled line rolls and the special ruled line rolls 11 and 12, and to move these ruled line rolls up and down independently by the above-described cylinder mechanism (see reference numeral 41 in FIG. 10).

In this case, if the lower normal ruled line roll 2 and the lower special ruled line roll 4 are configured to be driven to rotate by one drive shaft 9, one head and one motor can be used to minimize cost increase. Can be. In the scoring device configured as described above, at the time of scoring of the normal ruled line, as shown in FIG.
And the upper special ruled line roll 3 is driven upward to be separated from the corrugated cardboard sheet 8. Then, by running the corrugated cardboard sheet 8 in this state, the ordinary ruled line is processed. In addition, when the special ruled line is scored, the upper special ruled line roll 3 is driven downward to come into contact with the corrugated cardboard sheet 8, and the upper normal ruled line roll 1 is driven upward to separate from the corrugated cardboard sheet 8. Then, ruled line processing is performed.

However, even with such a configuration, there are the following problems. That is, the lower ruled line rolls 2 and 4 are always in contact with the normal ruled line roll 11 and the special ruled line roll 12 with the corrugated cardboard sheet 8,
For example, even when the normal ruled line is scored, the lower special ruled line roll 4, which is not originally required, remains in contact with the lower surface of the cardboard sheet 8 (see FIG. 8). For this reason, as shown in FIG. 9, there is a problem that the lower special ruled line roll 4 damages or crushes the surface (lower surface) of the corrugated cardboard sheet 8 and deteriorates the quality of the corrugated cardboard sheet 8.

Here, in FIG. 9, the two-dot chain line indicates the cross-sectional shape of the corrugated cardboard sheet 8 before scoring, and the solid line indicates the cross-sectional shape of the corrugated cardboard sheet 8 after scoring. On the left side of the figure, the desired ruled line processing is performed on the corrugated cardboard sheet 8 by the normal ruled line roll 11, but on the right side of the figure, the unnecessary collapse is caused by the lower special ruled line roll 4. This crushing occurs in a narrow range within 60 mm from the ruled line by the normal ruled line roll 11, and the crushing margin is 30 mm.
It is relatively large, from 0 to 500 μm, and can be confirmed with the naked eye.

Although the above description has been made with reference to the case where a normal ruled line is set, the same applies to the case of setting a special ruled line. In order to solve such a problem, the lower ruled line roll that is not used may be separated from the corrugated cardboard sheet 8 like the upper ruled line roll. The lower special ruled roll 4 cannot be driven by a common motor, and two motors are required for one head. Further, a lifting mechanism is required for each of the lower ruled line rolls 2 and 4. For such reasons, a significant increase in cost is caused.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is intended to improve the quality of a corrugated cardboard sheet while minimizing damage and crushing of the corrugated cardboard sheet while suppressing an increase in cost. An object of the present invention is to provide a creaser and a crease roll for the creaser.

[0022]

According to the present invention, there is provided a corrugated cardboard sheet scoring device according to the first aspect of the present invention, wherein the corrugated cardboard sheet is creased on a surface thereof. A first crease roll provided with a movable roll that can be separated and attached and a regular roll that rotates while always in contact with the corrugated cardboard sheet; and a first crease roll provided adjacent to the first crease roll. A second ruled line roll for processing a ruled line different from the ruled line processed by the first ruled line roll, and a surface for reducing the concentration of stress on the corrugated cardboard sheet by the permanent roll. It is characterized by having pressure reducing means.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the surface pressure reducing means is provided between the two normal rolls. It is characterized in that it is a support roll formed to have the same outer diameter as the two regular rolls. According to a third aspect of the present invention, in addition to the configuration of the first aspect, the surface pressure reducing means is provided between the two normal rolls, and the corrugated cardboard sheet is provided with the surface pressure reducing means. It is characterized in that it is a support table that always comes in contact with it.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, the surface pressure reducing means is provided on each of outer side portions of the two normal rolls. And a support roll formed to have the same outer diameter as the two normal rolls.
Further, the corrugated cardboard sheet scoring device according to claim 5 is
In addition to the configuration according to claim 1, the surface pressure reducing means includes:
Provided on the outer sides of the two regular rolls, respectively.
Further, the support table is characterized in that it is a support table that is always in contact with the cardboard sheet.

According to a sixth aspect of the present invention, there is provided a corrugated cardboard sheet creaser according to the second aspect.
The support roll is formed of a rigid body. Further, a corrugated cardboard sheet scoring device according to a seventh aspect is characterized in that, in addition to the configuration according to the second or fourth aspect, the support roll is formed of an elastic body.

The corrugated cardboard sheet scoring device according to the eighth aspect of the present invention, in addition to the configuration according to the third or fifth aspect,
The support table is formed of a rigid body. According to a ninth aspect of the present invention, in addition to the configuration of the third or fifth aspect, the support table is formed of an elastic body.

A crease roll for a crease device according to a tenth aspect of the present invention is a crease roll for a crease device for performing crease processing on the surface of a corrugated cardboard sheet. It is characterized by comprising a roll and a support roll provided between the two normal rolls and having an outer diameter equal to that of the two normal rolls.

[0028] A ruled line roll for a ruled line device according to claim 11 is a ruled line roll for a ruled line device for forming a ruled line on the surface of a corrugated cardboard sheet, the two regular contacts rotating constantly in contact with the corrugated cardboard sheet. It is characterized by comprising a roll and a support roll provided on the outer side of the two normal rolls and having the same outer diameter as the two normal rolls.

A ruled line roll for a ruled device according to a twelfth aspect is a ruled line roll for a ruled line device for performing a ruled line process on the surface of a corrugated cardboard sheet, wherein the two regular contacts which are always in contact with the corrugated cardboard sheet and rotate. A roll and a support roll which is provided between the two normal rolls and on the outer side of the two normal rolls, and has an outer diameter equal to that of the two normal rolls. It is characterized by.

A ruled line roll for a ruler according to claim 13 has, in addition to the configuration described in any one of claims 10 to 12, at least one of the two normal rolls;
The support roll and the support roll are formed integrally.

[0031]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a corrugated cardboard sheet creaser according to an embodiment of the present invention. FIG.
FIG. 2 is a schematic sectional view showing the configuration of the main part. Figure 1
In FIG. 2 and FIG. 2, reference numeral 8 denotes a corrugated cardboard sheet, and reference numerals 11 and 12 denote first and second ruled line rolls for scoring the corrugated cardboard sheet 8. First, the first ruled line roll 11 will be described. The first ruled line roll 11 is a normal ruled line roll used for normal ruled line processing, and is an upper normal ruled line roll (movable roll) disposed above the corrugated cardboard sheet 8. 1 and a lower normal ruled line roll (normal roll) 2 disposed below the corrugated cardboard sheet 8
It is comprised including. Here, the upper normal ruled line roll 1 and the lower normal ruled line roll 2 have a convex portion and a concave portion having a shape corresponding to a standard ruled line which is frequently processed.

In the same manner as described with reference to FIG. 8, the lower normal ruled line roll 2 is set so as to be always in contact with the corrugated cardboard sheet 8 and the same speed as the traveling speed of the corrugated cardboard sheet 8 by a motor (not shown). It rotates at a peripheral speed. Also, the upper normal ruled line roll 1 is
As shown in FIG. 2, a rotatable shaft 9 provided on an arm 39 is rotatably supported via a bearing (bearing) 10. The sheet 8 is configured to be detachable from the sheet 8.

On the other hand, the second ruled line roll 12 is a special ruled line roll for processing a special ruled line different from the normal ruled line processed by the normal ruled line roll 11, and is provided adjacent to the normal ruled line roll 11. ing. The special ruled line roll 12 is also provided with an upper special ruled line roll 3 as a movable roll and a lower special ruled line roll 4 as a normal roll, which function in the same manner as the above-described ordinary ruled line roll 11. In the special ruled roll 12, the convex portions and the concave portions of the upper special ruled roll 3 and the lower special ruled roll 4 are formed in a shape corresponding to the special ruled line. Is configured.

The normal ruled line roll 11 and the special ruled line roll 12 are provided on a common head and are integrated into one unit. A plurality of such units (heads) are provided in the width direction (CD direction) of the cardboard sheet 8, and each head is configured to be movable in the width direction. Further, as shown in FIG. 2, two lower ruled line rolls (hereinafter, when the lower normal ruled line roll and the lower special ruled line roll are not particularly distinguished from each other, they are simply referred to as a lower ruled line roll).
The two rolls 2 and 4 are provided on a common rotary shaft 9, and the two lower ruled line rolls 2 and 4 are simultaneously driven by one motor provided for each head.

At the time of scoring, the cardboard sheet 8
Either the normal ruled line roll 11 or the special ruled line roll 12 is selectively used depending on the type of the roll. Next, a main part of the present invention will be described. As shown in FIGS. 1 and 2, a roll (central support roll) 6 is provided inside (center side) of the two lower ruled line rolls 2 and 4. Rolls (left support roll and right support roll) 5 and 7 are also provided on the outer sides of the two lower ruled line rolls 2 and 4, respectively.

As shown in FIG. 2, each of these support rolls 5 to 7 is rotatably supported via a bearing 10 coaxially with the two lower ruled rolls 2 and 4, and is rotatably supported. The outer diameter of the side ruled line rolls 2 and 4 is equal to the outer diameter. As a result, each of the support rolls 5 to 7 always comes into contact with the lower surface of the corrugated cardboard sheet 8 in the same manner as the lower ruled line rolls 2 and 4, and the lower ruled line roll not used for the ruled line processing (FIG. , In FIG. 2, the lower special ruled roll 4 corresponds to the cardboard sheet 8.

That is, the lower ruled line roll on the side not used for ruled line processing (hereinafter referred to as a suspended lower ruled line roll)
Does not have any effect on the corrugated cardboard sheet 8. However, as described in the section of the problem to be solved by the invention, when two ruled line rolls 11 and 12 are provided for one head, Since the lower ruled line roll in the middle is always in contact with the corrugated cardboard sheet 8, a trace (scratch or crush) of the lower ruled line roll in contact with the suspended lower ruled roll is generated on the corrugated cardboard sheet 8 (see FIG. 9). 8 is a factor that lowers the merchantability.

Such traces are formed on the lower ruled line rolls 2 and 4
Is caused by crushing the corrugated cardboard sheet 8. Therefore, by providing support rolls 5 to 7 on both sides of the two lower ruled line rolls 2 and 4, the surface pressure of the edges of the lower ruled line rolls 2 and 4 against the corrugated cardboard sheet 8 is reduced. The collapse is reduced to such an extent that it cannot be visually observed.

As for the lower ruled line roll (the lower normal ruled line roll 2 in FIGS. 1 and 2) on the side provided for the ruled line processing, the corresponding upper ruled line roll (also the upper normal ruled line roll 1) is appropriate. While the sheet is in contact with the corrugated cardboard sheet 8 by pressure, the corrugated cardboard sheet 8 is sandwiched between the upper and lower ruled line rolls 1 and 2 to perform the scoring.
Does not hinder the ruled line processing.

In FIGS. 1 and 2, each of the support rolls 5 to 7 and the two lower ruled line rolls 2 and 4 are so designed as to bite into the corrugated cardboard sheet 8 (that is, the corrugated cardboard sheet 8). In actuality, the bite amount (offset amount) L shown in FIG. 1 is set to an extremely small value of about 100 to 200 μm.

As described above, in the first embodiment, the concentration of stress on the corrugated cardboard sheet 8 of the lower ruled line rolls 2, 4 is reduced between the two lower ruled line rolls 2, 4 and on each side thereof. Support rolls 5 as means for reducing surface pressure
There is a technical feature in the provision of ~ 7. Incidentally, each of the support rolls 5 to 7 is formed of a rigid body such as steel here. By forming each of the support rolls 5 to 7 as a rigid body, the support rolls 5 to 7 can be made to have excellent abrasion resistance. Can also be an excellent ruler.

Each of these support rolls 5 to 7 may be formed of an elastic material such as urethane rubber. When each of the support rolls 5 to 7 is formed by using an elastic body, the elasticity of the support rolls 5 to 7 further reduces the crushing of the corrugated cardboard sheet 8 and greatly improves the merchantability of the corrugated cardboard sheet 8. Further, the left and right support rolls 5 and 7 may be formed of one of an elastic body and a rigid body, and the center support roll 6 may be formed of the other material. The combination of such materials is freely set. It is possible.

Further, in the above description, the case where each of the left and right support rolls 5, 7 and the central support roll 6 are rotatably mounted on the rotating shaft 9 via the bearing 10 has been exemplified (see FIG. 2). ), The support rolls 5 to 7 may be engaged with the rotating shaft 9 and driven to rotate at the same peripheral speed as the lower ruled line rolls 2 and 4. Since the corrugated cardboard sheet scoring device according to the first embodiment of the present invention is configured as described above, the operation when scoring the corrugated cardboard sheet 8 will be described below.

When the normal ruled line is to be scored, the width direction positions of the upper and lower heads are adjusted so that the upper and lower ruled line rolls 1 and 2 of the normal ruled line roll 11 are at predetermined positions.
Then, the upper roll 3 of the special ruled line roll 12 is driven upward to separate it from the corrugated cardboard sheet 8, and the upper normal ruled line roll 1 is lowered and brought into contact with the corrugated cardboard sheet 8 with an appropriate pressing force.

In this state, the corrugated cardboard sheet 8 is run, and a motor (not shown) is operated to drive the two lower ruled line rolls 2 and 4 at the same peripheral speed as the corrugated cardboard sheet 8. Thus, the corrugated cardboard sheet 8 is processed into a ruled line corresponding to the uneven shape of the upper and lower normal ruled line rolls 1 and 2. And at the time of such a ruled line processing, 2
Rolls 2 and 4 and each support roll 5-7
Are all in contact with the corrugated cardboard sheet 8, so that the lower special ruled roll 4 which is not necessary for the crease processing at this time reduces scratches, crushes (dents) and the like on the corrugated cardboard sheet 8.

That is, when the support rolls 5 to 7 do not exist, the contact area between the lower special ruled line roll 4 and the corrugated cardboard sheet 8 is small. It is large and the corrugated cardboard sheet 8 is damaged or crushed. In particular, such scratches and crushes occur at the edge of the lower special ruled line roll 4. On the other hand, in the present embodiment, the support rolls 5 to 7 formed to have the same outer diameter are simultaneously brought into contact with the two lower ruled line rolls 2 and 4 against the corrugated cardboard sheet 8 so that 1
The surface pressure on the corrugated cardboard sheet 8 is dispersed and reduced without stress being concentrated at the location, and the damage and crushing of the corrugated cardboard sheet 8 are reduced.

Specifically, as shown in FIG. 3, the collapse of the corrugated cardboard sheet 8 is 100 μm over a wide range of about 160 mm in width.
m, the amount of crushing is small, and damage and crushing of the corrugated cardboard sheet 8 can be reduced to a level that is difficult to visually confirm, and the quality of the corrugated cardboard sheet 8 is greatly improved. The inventors of the present application have confirmed that the above-described effects can be obtained with any of the double-sided corrugated cardboard, double-sided corrugated cardboard, and double-sided corrugated cardboard.

Further, according to the present apparatus, the support rolls 5 to 5 are provided between the two lower ruled line rolls 2 and 4 and on the side.
With the simple configuration of providing 7, there is also an advantage that almost no increase in cost is caused. In addition,
Although the above description has been given of the case where the normal ruled line is scored, the same operation as described above is performed except that the operations of the normal ruled line roll 11 and the special ruled line roll 12 are reversed when the special ruled line is scored. For this reason, detailed description is omitted, but it goes without saying that the same effect as described above can be obtained.

As a modification of this embodiment, one support roll may be formed by integrating all of the two lower ruled rolls 2 and 4 and each of the support rolls 5 to 7. Even in this case, the same effect as described above can be obtained, the number of parts can be reduced, and the cost can be further reduced. Further, the lower normal ruled line roll 2 and the support rolls 5 and 6 may be integrally formed, or the lower special ruled line roll 4 and the support rolls 6 and 7 may be integrally formed.

Next, a description will be given of a corrugated cardboard sheet scoring device according to a second embodiment of the present invention. FIG. 4 is a schematic front view showing the configuration of the main part. The second
The second embodiment differs from the first embodiment only in the specific configuration of the surface pressure reducing means, and the other configurations are the same as those in the first embodiment. For this reason, the same members as those in the first embodiment are denoted by the same reference numerals, and description of overlapping parts will be omitted as much as possible.

As shown in FIG. 4, the lower normal ruled line roll 2
And a lower special ruled line roll 4 between which a corrugated cardboard sheet 8
(Central support table) 14 is provided. Also, on the outer sides of the two lower ruled line rolls 2 and 4, a left support table 13 and a right support table 15, which also contact the corrugated cardboard sheet 8, respectively.
In the second embodiment, these support tables 13 to 15 function as surface pressure reducing means.

Each of these support tables 13 to 15
Are fixed to a frame or the like (not shown) so as to be in sliding contact with the lower surface of the cardboard sheet 8. Further, as shown, each of the support tables 13 to 15
The outer peripheral surfaces of the lower ruled line rolls 2 and 4 are corrugated cardboard sheets 8.
It is set to the same height as the contact height. That is, the pushing amount of the corrugated cardboard sheet 8 by each of the support tables 13 to 15 and the pushing amount of the corrugated cardboard sheet 8 by each of the lower ruled line rolls 2 and 4 are set to match. Note that the pushing amount L is a minute value of about 100 to 200 μm as in the first embodiment.

The length of each of the support tables 13 to 15 in the running direction is not particularly limited, and can be appropriately changed in accordance with layout requirements such as clearance with other members and design requirements. In this case, for example, the value is set to be substantially equal to the outer diameter of the lower ruled line rolls 2 and 4. In addition, each of the support tables 13 to 15
Is formed of a rigid body such as steel in consideration of abrasion resistance, but each of the support tables 13 to 15 may be formed of an elastic body such as urethane rubber. When formed by using an elastic body, the crushing of the corrugated cardboard sheet 8 is further reduced by the elasticity, and the merchantability of the corrugated cardboard sheet 8 is further improved.

The left and right support tables 13 and 15
May be formed of either an elastic body or a rigid body, and the central support table 14 may be formed of the other material.
The reverse combination may be used, and such a combination of materials can be freely changed. The corrugated cardboard sheet scoring device according to the second embodiment of the present invention comprises:
Since the configuration is as described above, the same operation and effect as in the first embodiment can be obtained.

That is, when the support tables 13 to 15 are not present, the contact area between the lower special ruled line roll 4 and the corrugated cardboard sheet 8 is small during normal ruled line processing. The corrugated cardboard sheet 8 is damaged or crushed due to the large surface pressure received from the outside. However, when the support tables 13 to 15 as the surface pressure reducing means are provided as in the second embodiment,
Since each of the support tables 13 to 15 abuts on the corrugated cardboard sheet 8 together with the two lower ruled line rolls 2 and 4, stress is not concentrated on one place of the corrugated cardboard sheet 8, and the surface pressure on the corrugated cardboard sheet 8 is dispersed. ,
As a result, the damage and crushing of the cardboard sheet 8 are reduced to a level that is difficult to visually confirm.

Further, according to the present apparatus, the support table 1 is provided between the two lower ruled line rolls 2 and 4 and on the side.
With a simple configuration in which 3 to 15 are provided, an increase in cost can be suppressed as much as possible. Next, a description will be given of a corrugated cardboard sheet scoring device according to a third embodiment of the present invention. FIG. 5 is a schematic front view showing the configuration of the main part.

The third embodiment also differs from the above embodiments only in the specific structure of the surface pressure reducing means, and the other structures are the same as those in the first and second embodiments. It is configured similarly. Therefore, the first and second
The same members as those described in the embodiment are denoted by the same reference numerals, and description of overlapping portions will be omitted as much as possible. In the third embodiment, as the surface pressure reducing means, the central support roll 6 described in the first embodiment and the left and right support tables 13 and 15 described in the second embodiment are combined. Is configured similarly to the other embodiments described above.

Therefore, the same operation and effect as those of the first embodiment can be obtained in the corrugated cardboard sheet scoring device according to the third embodiment. That is, since the support tables 13 and 15 and the central support roll 6 simultaneously contact the corrugated cardboard sheet 8 together with the two lower ruled line rolls 2 and 4, stress is not concentrated on one place of the corrugated cardboard sheet 8. As a result, the cardboard sheet 8
The surface pressure of the corrugated cardboard sheet 8 can be reduced to a level where it is difficult to visually confirm the damage and crushing of the corrugated cardboard sheet 8, and the quality of the corrugated cardboard sheet 8 is improved. Further, with the simple configuration as described above, an increase in cost can be suppressed as much as possible.

Next, a description will be given of a corrugated cardboard sheet scoring apparatus according to a fourth embodiment of the present invention. FIG. 6 is a schematic front view showing the configuration of the main part. The fourth embodiment also differs from the above embodiments only in the specific configuration of the surface pressure reducing means, and the other configurations are the same as those in the first and second embodiments. I have. For this reason, the same members as those described in the first and second embodiments are denoted by the same reference numerals, and description of overlapping parts will be omitted as much as possible.

In the fourth embodiment, as the surface pressure reducing means, the left and right support rolls 5 and 5 described in the first embodiment are used.
7 and the central support table 14 described in the second embodiment.
It is configured similarly to the other embodiments described above. Therefore, the same operation and effect as those of the first embodiment can be obtained in the corrugated cardboard sheet scoring device according to the fourth embodiment. That is, since the support rolls 5 and 7 and the central support table 14 simultaneously contact the corrugated cardboard sheet 8 together with the two lower ruled line rolls 2 and 4, stress is not concentrated on one place of the corrugated cardboard sheet 8. As a result, the surface pressure on the corrugated cardboard sheet 8 is dispersed,
As a result, the damage and crushing of the corrugated cardboard sheet 8 can be reduced to a level that is difficult to visually confirm. Thereby, the quality of the cardboard sheet 8 can be improved. Further, with the simple configuration as described above, an increase in cost can be suppressed as much as possible.

Next, a description will be given of a corrugated cardboard sheet scoring apparatus according to a fifth embodiment of the present invention. FIG. 7 is a schematic front view showing the configuration of the main part. Also in the fifth embodiment, the same members as those described in the first embodiment are denoted by the same reference numerals, and description of overlapping portions will be omitted as much as possible. In the fifth embodiment, the central support roll 6 as the surface pressure reducing means is divided into two support rolls 6a and 6b as shown in the figure. Here, the center support roll 6a and the left support roll 5 are fixed to the lower normal ruled line roll 2, and the center support roll 6b and the right support roll 7 are also fixed to the lower special ruled line roll 4. I have.

This takes into account the convenience of replacing the lower normal ruled line roll 2 and the lower special ruled line roll 4 with new rolls according to the type of ruled line to be processed. For example, when the special ruled line roll 12 is replaced from a previously attached one to another, the lower special ruled line roll 4 can be removed by removing the lower special ruled line roll 4 so that the central support roll 6b and the right side can be replaced at once. The support roll 7 is also removed.

Then, the lower special ruled line roll 4 is replaced by a simple operation of attaching a new lower special ruled line roll to which the center support roll and the right support roll are fixed to the rotating shaft 9. You can do it. Since the corrugated cardboard sheet scoring device according to the fifth embodiment of the present invention is configured as described above, when the type of corrugated cardboard sheet 8 changes, or when the corrugated cardboard sheet 8 is the same, the ruled line rolls 11 and 12 are exchanged. When it is necessary to do so, simple work is required, and there is an advantage that work efficiency is greatly improved.

Note that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the present invention. For example, instead of the support rolls 5 to 7 and the support tables 13 to 15 at the center of the two lower ruled line rolls 2 and 4 and at the same speed in the traveling direction of the corrugated cardboard sheet 8 as a surface pressure reducing means, instead of the support rolls 5 and 7 A belt may be provided, and the belt may be pressed against the lower surface of the corrugated cardboard sheet 8 by an appropriate means. And even in the case of such a configuration, it is possible to reduce the damage and crushing of the corrugated cardboard sheet 8 to a level that is difficult to visually confirm.

The lower normal ruled line roll 2 and the lower special ruled line roll 4 having the support rolls 5 to 7 as the surface pressure reducing means may be used in a conventional scoring device, or may be used as the surface pressure reducing means. May be used in a conventional scoring device. In this case, there is an advantage that a high-quality corrugated cardboard sheet can be manufactured with almost no change in the conventional ruler.

[0066]

As described above in detail, according to the corrugated cardboard sheet creaser of the first aspect, the movable roll which can be separated from and brought into contact with the corrugated cardboard sheet and the corrugated cardboard sheet always contact the corrugated cardboard sheet. A first crease roll provided with a regular roll that rotates while being in contact with the first crease roll, a movable roll and a regular roll similar to the first crease roll, the first crease roll being provided adjacent to the first crease roll; By providing a second ruled line roll for processing a ruled line different from the ruled line processed by the ruled line roll, and a surface pressure reducing means for reducing the concentration of stress of the permanent roll on the corrugated cardboard sheet, damage to the corrugated cardboard sheet is reduced. There is an advantage that the crushing or the like can be reduced to a level that cannot be visually confirmed, and the quality of the cardboard sheet is greatly improved.

Further, according to the corrugated cardboard sheet scoring device of the present invention, the surface pressure reducing means can be manufactured at low cost, and increase in cost can be suppressed as much as possible. Also,
According to the corrugated cardboard sheet scoring device of the present invention, the support roll or the support table as the surface pressure reducing means is formed of a rigid body, so that the surface pressure reducing means having excellent wear resistance is provided. Can be provided, and a scoring device excellent in maintainability while suppressing collapse of the cardboard sheet as much as possible can be provided.

Further, according to the corrugated cardboard sheet scoring device of the present invention, the support roll or the support table as the surface pressure reducing means is formed of an elastic body. The crushing of the corrugated cardboard sheet 8 is further reduced by the elasticity, and the merchantability of the corrugated cardboard sheet is greatly improved. Further, according to the ruled line roll for the creaser of the present invention described in claims 10 to 12, it is possible to reduce the damage, crushing, etc. of the corrugated cardboard sheet to a level that cannot be visually confirmed at low cost, and the quality of the corrugated cardboard sheet is greatly improved. There is an advantage of doing so. In addition, by using the ruled line roll of the present invention in a conventional ruler, a high-quality corrugated cardboard sheet can be manufactured without changing the conventional ruler.

According to the crease roll of the present invention, at least one of the two normal rolls and the support roll are integrally formed to reduce the number of parts. Further, cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a main configuration of a corrugated cardboard sheet scorer according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating a configuration of a main part of a corrugated cardboard sheet scorer according to the first embodiment of the present invention.

FIG. 3 is a view for explaining the operation of the corrugated cardboard sheet creaser according to the first embodiment of the present invention.

FIG. 4 is a schematic front view showing a configuration of a main part of a corrugated cardboard sheet scorer according to a second embodiment of the present invention.

FIG. 5 is a schematic front view illustrating a main configuration of a corrugated cardboard sheet creaser according to a third embodiment of the present invention.

FIG. 6 is a schematic front view illustrating a main configuration of a corrugated cardboard sheet creaser according to a fourth embodiment of the present invention.

FIG. 7 is a schematic front view showing a configuration of a main part of a corrugated cardboard sheet scorer according to a fifth embodiment of the present invention.

FIG. 8 is a schematic diagram showing a main configuration of a scoring device devised in the process of creating the present invention.

FIG. 9 is a diagram for describing a problem in the ruler devised in the course of creation of the present invention.

FIG. 10 is a schematic side view showing an example of the entire configuration of a conventional ruler.

FIG. 11 is a schematic plan view showing the state of crease processing and cleaving in a conventional creaser.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper normal ruled line roll (movable roll) 2 Lower normal ruled line roll (normal contact roll) 3 Upper special ruled line roll (movable roll) 4 Lower special ruled line roll (normal contact roll) 5 Left support roll as surface pressure reduction means 6 Central support roll as surface pressure reduction means 7 Right support roll as surface pressure reduction means 8 Corrugated cardboard sheet 9 Rotating shaft 10 Bearing 11 Normal crease roll as first crease roll 12 Special crease roll as second crease roll 13 Left support table as pressure reducing means 14 Central support table as surface pressure reducing means 15 Right support table as surface pressure reducing means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshinao Okihara 5007 Itozakicho, Mihara City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd.Paper & Printing Machinery Division (72) Inventor Tadashi 5007 Itozakicho, Mihara City, Hiroshima Prefecture Mitsubishi Heavy Industries F-term in Paper & Printing Machinery Division (reference) 3E075 AA12 BA01 CA01 DB02 DB23 GA02 3E078 BB01 DD11

Claims (13)

[Claims] 1. A scoring device for forming a crease line on a surface of a corrugated cardboard sheet, comprising: a movable roll capable of being separated from and brought into contact with the corrugated cardboard sheet; A first ruled line roll provided with: a ruled line provided adjacent to the first ruled line roll, having a movable roll and a normal contact roll similar to the first ruled line roll, and processed by the first ruled line roll; A second crease roll for processing different creases, and a surface pressure reducing means for reducing concentration of stress of the permanent roll on the corrugated cardboard sheet. 2. The method according to claim 1, wherein the surface pressure reducing means is a support roll provided between the two normal rolls and having an outer diameter equal to that of the two normal rolls.
The corrugated cardboard sheet creaser according to claim 1. 3. The corrugated cardboard according to claim 1, wherein the surface pressure reducing means is a support table provided between the two normal rolls and constantly in contact with the corrugated cardboard sheet. Sheet marking device. 4. The support roll is provided on each of the outer side portions of the two tangential rolls and has a diameter equal to that of the two tangential rolls. 2. The corrugated cardboard sheet scoring device according to claim 1, wherein: 5. The support table, wherein the surface pressure reducing means is provided on each of the outer side portions of the two normal rolls, and is a support table which is always in contact with the corrugated cardboard sheet. 2. A corrugated cardboard sheet scoring device according to 1. 6. An apparatus according to claim 2, wherein said support roll is formed of a rigid body. 7. The corrugating board according to claim 2, wherein the support roll is formed of an elastic body. 8. The corrugated cardboard sheet scoring device according to claim 3, wherein the support table is formed of a rigid body. 9. The corrugated cardboard sheet scoring device according to claim 3, wherein the support table is formed of an elastic body. 10. A crease roll for a creaser for performing crease processing on a surface of a corrugated cardboard sheet, comprising: two normally-contact rolls which always contact and rotate with the corrugated-cardboard sheet; and are provided between the two normal-contact rolls. And a support roll formed with an outer diameter equal to that of the two normal rolls. 11. A crease roll for a creaser for performing crease processing on the surface of a corrugated cardboard sheet, comprising: two normally-contact rolls which are always in contact with and rotate on the corrugated-cardboard sheet; Each is provided in the section,
And a support roll formed to have an outer diameter equal to the two normal rolls. 12. A ruled line roll for a ruler for performing a ruled line process on a surface of a corrugated cardboard sheet, comprising: two normally-contact rolls which are always in contact with and rotate on the corrugated-cardboard sheet; What is claimed is: 1. A ruled line roll for a scoring device, comprising: a support roll provided on an outer side portion of each of two normal contact rolls and having an outer diameter equal to that of the two normal contact rolls. 13. The scoring device according to claim 10, wherein at least one of the two normal rolls and the support roll are formed integrally. Ruled line roll.