JP2000094384A - Slitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably perform good slitting by sharpening the cut end of a sheet. SOLUTION: A slitter yoke 12 is arranged below a feeding line for a cardboard sheet S, and a slitter blade 24 is rotatably arranged on a slitter head 20 pivotally supported on the yoke 12 so as to be freely oscillated. A sheet receiving device 32 facing the slitter blade 24 and for stably supporting a sheet S is arranged above the feeding line for the cardboard sheet S. The sheet receiving device 32 is rotatably provided with a pair of receiving rollers 58, 60 to be separated in the sheet feeding direction. Both rollers 58, 60 support the cardboard sheet S at their both sides in the sheet feeding direction, for pinching the slitter blade 24 facing the slitting position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter, and more particularly, to slitting, for example, a continuous corrugated sheet along a feeding direction by rotating a single thin slitter blade at high speed. It is related to the slitter to be performed.

[0002]

2. Description of the Related Art For example, a slitter for slitting a continuously fed cardboard sheet along its feeding direction is provided with a pair of slitter blades vertically above and below the sheet feeding line. The blades are adapted to be rotated in opposite directions. These two slitter blades are configured as so-called single blades, and are positioned so that the flat sides of the blade edges overlap each other by a predetermined length. Then, by horizontally feeding the corrugated cardboard sheet between both slitter blades, the sheet is slitted along the feeding direction.

[0003] However, since the thickness of these single-blade slitter blades is large, if the length of the portion where the upper and lower blades overlap is not optimally set with respect to the thickness of the corrugated cardboard sheet, the sheet slitting is performed. Sometimes, the slitter blade crushes the cut end of the sheet, and the cut end lacks sharpness and becomes dirty, resulting in poor quality. That is, in order to sharpen the cut edge of the corrugated cardboard sheet and perform good slitting, it is necessary to precisely adjust the length dimension of the overlapping portion of the flat surfaces of the upper and lower slitter blades in accordance with the thickness dimension of the sheet. This operation was an extremely complicated operation requiring skill. In addition, the interval between the overlapping portions of the two slitter blades has a great influence on the quality of the cut edge of the corrugated cardboard sheet, so that it is necessary to set the interval very strictly, and this adjustment operation takes time.

In order to cope with the above-mentioned problem, a disk-shaped slitter blade having a very small thickness (2 mm or less) and a sheet receiving device opposed to the slitter blade with a cardboard sheet feeding line interposed therebetween are disclosed. Has been proposed. In this slitter, the slitter blade is positioned in a gap defined between a pair of receiving rollers constituting the sheet receiving device so that the blade edge of the slitter blade partially faces in a non-contact manner (slitting state). By rotating at a high speed of about 1.5 to 3 times the feeding speed of the corrugated cardboard sheet, the slitting of the corrugated cardboard sheet is performed. That is, since one slitter blade is used, the operation of adjusting the slitter blade for the corrugated cardboard sheet can be simplified. Further, since the slitter blade is extremely thin, it has an advantage that the cut end of the corrugated cardboard sheet can be prevented from being crushed.

[0005]

In the above-mentioned slitter, the slitting by the slitter blade is carried out in a state in which the corrugated paperboard sheet is supported by a pair of receiving rollers disposed at positions opposed to the slitter blade with the feed line of the corrugated paperboard therebetween. Is performed. In this case, the pair of receiving rollers are arranged in parallel at a position orthogonal to the sheet feeding direction,
Both receiving rollers contact the corrugated cardboard sheet on the same line perpendicular to the feeding direction. That is, since the cardboard sheet slitted by the slitter blade is only supported by the receiving roller at one point in the feeding direction,
In particular, when slitting a corrugated cardboard sheet that is weak to the waist, the sheet escapes in a direction away from the slitter blade, and there has been a problem that reliable slitting cannot be performed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems inherent in the prior art described above, and has been proposed in order to solve the problem in a favorable manner. It is an object of the present invention to provide a slitter that can be reliably performed.

[0007]

[MEANS FOR SOLVING THE PROBLEMS]
In order to suitably achieve the intended purpose, the slitter according to the present invention is provided with a slitter yoke that is movable in the machine width direction intersecting with the sheet feeding direction and is stopped at an arbitrary position. A slitter head that is provided and reciprocates between a slitting position and a rest position, and a disk-shaped slitter blade rotatably supported by the slitter head and driven to rotate in the sheet feeding direction to be slitted. A slitter provided on the opposite side to the slitter yoke with the sheet feeding line interposed therebetween, and movable in the machine width direction and stopped at an arbitrary position; And a pair of receiving rollers for supporting the sheet separated in the feeding direction with a vertical line passing through the center of rotation of the slitter blade facing the slitting position. The feeding direction upstream side of the receiving roller, characterized in that it is set to be positioned near the slitting start position of the sheet by the slitter blade.

[0008] In order to solve the above-mentioned problems and appropriately achieve the intended purpose, a slitter according to another invention of the present application is movable in the machine width direction intersecting the sheet feeding direction and can be moved to any position. A slitter yoke which is stopped by the slitter yoke, a slitter head which is provided on the slitter yoke and which can reciprocate between a slitting position and a rest position, and which is rotatably supported by the slitter head and feeds a sheet to be slitted. A slitter provided with a disk-shaped slitter blade that is driven to rotate in the machine direction. The slitter extends parallel to the machine width direction on the side opposite to the side where the slitter yoke is disposed with the sheet feeding line interposed therebetween. A pair of receiving rollers spaced apart in the feeding direction with a perpendicular line passing through the center of rotation of the slitter blade facing the stating position being rotatably disposed, and receiving rollers on the upstream side in the feeding direction. Is set to be positioned near the slitting start position of the sheet by the slitter blades,
The slitter blade is configured to perform sheet slitting in a state where the pair of receiving rollers supports a region extending over substantially the entire width of the sheet.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a slitter according to the present invention will be described with reference to the accompanying drawings with reference to preferred embodiments. In an actual slitter, a plurality of slitter blades and sheet receiving devices forming a pair at the top and bottom are arranged in the machine width direction, but only one is shown in the figure.

[0010]

FIGS. 1 and 2 show a main part of a slitter according to a first embodiment of the present invention. The slitter has a line below a feed line of a corrugated cardboard sheet S. FIG.
A guide rail 10 is disposed horizontally in the machine width direction intersecting the (sheet feeding direction).
, A slitter yoke 12 is mounted. The slitter yoke 12 includes a screw shaft 1 disposed in parallel with the guide rail 10.
4 is rotatable and immovable in the axial direction, and the gear 16 is rotated forward and reverse by a motor 18 provided on the yoke 12 so that the slitter yoke 1
2 can be freely moved along the guide rail 10 and can be stopped at an arbitrary position.

A fork-shaped slitter head 20 is pivotally supported on the slitter yoke 12 in a direction along the feeding direction, and a piston of a hydraulic cylinder 22 having a bottom connected to the yoke 12 by a pin. Rod 22a
Are pin-connected to the slitter head 20. Further, the slitter head 20 has a disk-like and thin thickness (2 mm or less).
The slitter blade 24 has a rotating shaft 26 parallel to the screw shaft 14.
, And is rotatably driven counterclockwise in FIG. 1 by drive means (not shown). When the fluid pressure cylinder 22 is urged in the forward and reverse directions, the slitter blade 24 provided on the slitter head 20 is moved along the feed line as shown by a solid line in FIG. A slitting position extending above the upper surface of the corrugated cardboard sheet S to be fed, and a cutting edge of the slitter blade 24 as shown by a two-dot chain line on the upstream side in the feeding direction from the slitting position. To and from a rest position that does not interfere with the vehicle. The slitter blade 24 is set so as to be rotationally driven from the upstream side in the sheet feeding direction to the downstream side in a region where the cardboard sheet S is slitted, and the lower surface of the cardboard sheet S on the upstream side in the feeding direction. Is set to the slitting start position (position where the cutting edge of the slitter blade 24 first comes into contact with the lower surface of the cardboard sheet S) A.

The slitter yoke 12 has a slitter head 2 moved from a rest position to a slitting position.
An adjustment bolt 28 that can be brought into contact with 0 is screwed in, and is configured so that the slitting position of the slitter blade 24 can be adjusted by the adjustment bolt 28. As shown in FIG. 2, the slitter yoke 12 is provided below the sheet feed line with a guide plate 30 extending parallel to the line, so that the lower surface of the corrugated cardboard sheet S can be supported.

Above the feed line of the corrugated cardboard sheet S, there is provided a sheet receiving device 32 which faces the slitter blade 24 and stably supports the sheet S. That is, the guide rail 34 is disposed in parallel with the guide rail 10 with the feeding line interposed therebetween, and the receiving yoke 36 is mounted on the guide rail 34 so that the guide rail 34 can move freely. The receiving yoke 36 is provided with a gear 40 screwed to a screw shaft 38 disposed in parallel with the guide rail 34 so as to be rotatable and immovable in the axial direction. By performing the reverse rotation, the receiving yoke 36 can be freely moved along the guide rail 34 and can be stopped at an arbitrary position. When the slitter yoke 12 is shifted in the axial direction along the guide rail 10, the receiving yoke 36 is also shifted along the guide rail 34 in synchronization with the shift.

At the lower part of the receiving yoke 36, a suction chamber 44 is vertically provided as a support member which is connected to a suction source (not shown) and is opened downward, and the chamber 44 is provided with paper generated when slitting the cardboard sheet S. Works to remove powder by suction. A guide plate 46 is provided at a lower open end of the suction chamber 44, and the guide plate 46
As shown in FIGS. 3 and 5, a main body 46 a that closes the opening of the suction chamber 44 and extends parallel (horizontally) to the sheet feeding line, and the upstream and downstream of the main body 46 a in the feeding direction. And guide portions 46b and 46c formed on the side and inclined upward toward the open end. A pair of openings 48 and 50 are formed in the main body 46 a of the guide plate 46 so as to be separated from each other in the sheet feeding direction.
A portion of the receiving rollers 58, 60 (described later) is configured to protrude downward (toward the side where the slitter yoke 12 is disposed) from the corresponding rollers 8, 50. A slit 52 having a required width along the sheet feeding direction is formed between the openings 48 and 50.
The upper edge of the slitter blade 24 is partially received in the slit 52. The width of the slit 52 is set slightly larger than the thickness of the slitter blade 24.

As shown in FIG. 3, inside the suction chamber 44, a cardboard sheet S which intersects the sheet feeding direction is provided.
A pair of support shafts 54, 56 extending in the width direction are arranged at predetermined intervals in the feeding direction with a perpendicular C passing through the center of rotation of the slitter blade 24 facing the slitting position. Support shaft 54 located on the upstream side in the sheet feeding direction
A first receiving roller 58 is freely rotatably fitted to the outside, and a part of the outer periphery of the first receiving roller 58 projects slightly outward (downward) from an upstream opening 48 formed in the guide plate 46. Is set to Further, the second receiving roller 60 is freely rotatably fitted to the support shaft 50 located on the downstream side in the sheet feeding direction, and a part of the outer periphery of the second receiving roller 60 is formed on the downstream side formed on the guide plate 46. Is set so as to project slightly outward (downward) from the opening 50. The outer peripheral ends of the pair of receiving rollers 58 and 60 separated in the sheet feeding direction stably support the corrugated cardboard sheet S at two positions separated in the feeding direction. That is, by positioning the slitter blade 24 at the slitting position, as shown in FIG. 3, the slit 52 of the guide plate 46 partially receives the cutting edge of the slitter blade 24, and the feeding direction of the cutting edge. Receiving roller 5 on upstream and downstream sides
8, 60, and the slitter blade 24 is rotated at a high speed of about 1.5 to 3 times the sheet feeding speed in this state, so that the corrugated cardboard sheet S supplied horizontally from the right in FIG. It is slitted along the direction.

Here, the first receiving roller 58 is provided as shown in FIG.
As shown in FIG. 2, the slitting blade 24 is located almost directly above the slitting start position A of the corrugated cardboard sheet S by the slitter blade 24 facing the slitting position. It is configured to support securely. That is, the rising of the cardboard sheet S by the rotation of the slitter blade 24 is the first
The sheet S can be reliably slitted by being prevented by the receiving roller 58. In the first receiving roller 58, a circumferential groove 58a is formed on the movement trajectory of the slitter blade 24 moving between the rest position and the slitting position, and the first receiving roller 58 is moved to the slitting start position A.
Of the slitter blade 24 even when the slitter blade 24
When moving between the rest position and the slitting position, the slitter blade 24 and the first receiving roller 58 do not interfere with each other.

The second receiving roller 60 has a cutting edge of the slitter blade 24 facing the slitting position.
It is located substantially directly above a position B that is separated downward from the cardboard sheet S. That is, the first receiving roller 58 and the second receiving roller 60 are located as close to the slitter blade 24 as possible without interfering with the slitter blade 24 facing the slitting position across the perpendicular C.

In FIG. 1, reference numeral 62 denotes a polishing apparatus which functions to automatically polish the slitter blades 24 so that the corrugated cardboard sheet S can always be satisfactorily slitted. Reference numeral 64 denotes an application device that applies a lubricant such as oil to the slitter blade 24. Further, reference numerals 66 and 68 are upper and lower guide plates which are located upstream of the slitter in the feeding direction and guide the feeding of the cardboard sheet S to the slitter.

[0019]

Next, the operation of the slitter according to the first embodiment will be described. When slitting the corrugated paperboard sheet S, as shown in FIG. 1, by positioning the slitter blade 24 from the rest position to the slitting position, the cutting edge of the slitter blade 24 is partially located in the slit 52 of the guide plate 46. While being received, the receiving rollers 58, 60 are provided upstream and downstream in the feeding direction of the cutting edge.
Faces. In this state, the slitter blade 24 is rotated at a high speed of about 1.5 to 3 times the sheet feeding speed, and the corrugated cardboard sheet S is fed horizontally so that the sheet S is slitted in the feeding direction. You. That is, a pair of receiving rollers 58, 6 projecting downward from the guide plate 46.
At 0, the upper surface of the corrugated cardboard sheet S is slitted by the slitter blade 24 between the two in a state of being supported at two places separated in the sheet feeding direction.

In this case, the first receiving roller 58 and the second receiving roller 60 are positioned so as not to interfere with the slitter blade 24 facing the slitting position with the perpendicular C interposed therebetween.
Since the slitter blade 24 is located as close as possible to the slitter blade 24 and the first receiving roller 58 is located substantially directly above the slitting start position A by the slitter blade 24, the slitter blade 24 slits the cardboard sheet S. When the sheet S
Is surely slitted without floating. Further, since the pair of receiving rollers 58 and 60 project downward from the guide plate 46 and support the corrugated cardboard sheet S in a state of following and rotating, the guide plate 46 does not become a resistance for feeding the corrugated cardboard sheet S. The paper dust generated during the slitting of the cardboard sheet S is sucked into the suction chamber 44 through the openings 48 and 50 and the slit 52 in the guide plate 46, and the paper dust adheres to the cutting edge of the slitter blade 24. This prevents the slitting performance from deteriorating.

When the order change command is issued after the slitting of the corrugated cardboard sheet S of the required order is completed,
The hydraulic cylinder 22 is biased to move the slitter blade 24 from the slitting position to the rest position. In this state, the motors 18 and 42 are driven synchronously, and the slitter yoke 12 and the receiving yoke 36
It is moved along 34 to the cutting position of the new order. Then, as described above, the slitter blade 24 is moved to the slitting position, the slitter blade 24 is rotated at a high speed, and a new-order corrugated cardboard sheet S is supplied. Is slitted.
As described above, since the circumferential groove 58a is formed on the movement locus of the slitter blade 24 in the first receiving roller 58 on the upstream side in the feeding direction, the first receiving roller 58 moves between the rest position and the slitting position. The slitter blade 24 does not interfere with the first receiving roller 58.

As described above, in the slitter according to the first embodiment, the pair of receiving rollers 58, which are separated in the sheet feeding direction,
At 60, the corrugated paperboard sheet S slitted by the slitter blade 24 is supported at two places, so that reliable slitting of the sheet S can be achieved. That is, even if the cardboard sheet S has a weak waist, the sheet S
Can be prevented from floating due to rotation by the slitter blade 24, and sharp slitting of the cut can be achieved.

Here, since the slitter blades 24 are arranged below the feed line of the corrugated cardboard sheet S and the sheets S are slit from below by the slitter blades 24, peeling of the corrugated cardboard sheet S is prevented. can do. That is, in the corrugated cardboard sheet S supplied to the slitter, the liner supplied from below is bonded to the single-sided corrugated cardboard supplied from above in the double facer on the upstream side. For this reason, when the slitter blade 24 is arranged above the feed line and the cardboard sheet S is slitted, the liner bonded to the lower side of the single-sided cardboard is pushed in a direction in which the liner is peeled off, and both are sufficiently bonded. If not, the liner may peel off. However, when the slitter blade 24 is disposed below the feed line as in the first embodiment, the liner is pushed in the direction in which it is bonded to the single-sided cardboard, so that the liner can be reliably prevented from peeling off. You can do it.

When printing is performed on the lower surface of the corrugated cardboard sheet S downstream of the slitter, the sheet S is slit from below by the slitter blade 24, so that a beard or the like appears on the upper surface of the sheet at the cut. However, this does not affect the printing on the lower surface side.

[0025]

[Modification of the First Embodiment] In the first embodiment, the case where the receiving roller is projected from the opening of the guide plate provided in the suction chamber and the cardboard sheet is supported by the receiving roller has been described. May be omitted. Further, a configuration in which the configuration of the first embodiment is upside down, that is, a configuration in which a mechanism having a slitter blade is disposed above the sheet feeding line and a sheet receiving device is disposed below may be employed. Also in this case, the corrugated cardboard sheet is stably supported by the pair of receiving rollers when slitting the slitter blade, so that reliable slitting is achieved.

In the first embodiment, the structure in which the slitter blade is swung between the rest position and the slitting position has been described. However, the slitter head supporting the slitter blade with respect to the slitter yoke may be replaced with a hydraulic cylinder or the like. The linear actuator may be configured to move up and down linearly, and the slitter blade may linearly reciprocate between the slitting position and the rest position. In this case, since the slitter blade does not swing, there is no need to provide a circumferential groove in the first receiving roller. In the first embodiment, the suction chamber is used as a support member. However, the support member is not limited to a box-like one like the suction chamber, but may be used in the width direction as long as it can rotatably support the receiving roller. It may be a pair of frames separated from each other.

[0027]

Second Embodiment FIGS. 7 and 8 show a slitter according to a second embodiment of the present invention. In this second embodiment, a pair of receiving rollers 69 and 70 are processed by the slitter. The sheet receiving device 7 is disposed in a region extending over substantially the entire width of the largest corrugated cardboard sheet S to be changed.
1 is configured to make the position adjustment unnecessary. The description of the same components as in the first embodiment is omitted.

That is, a suction chamber 72 as a support member extending in a direction intersecting with the line for feeding the corrugated cardboard sheet S is provided between the slitter frames 78, 78. This suction chamber 72
At the lower open end of the main body 73a, the opening of the suction chamber 72 is closed to extend in parallel with the sheet feeding line, as in the first embodiment, and the main body 73a is upstream in the feeding direction. A guide plate 73 is provided which includes guide portions 73b and 73c formed on the side and the downstream side and inclined upward toward the open end. An opening 74 having an opening larger than the width of the corrugated cardboard sheet S is formed in the main body 73a of the guide plate 73, and a part of the pair of receiving rollers 69, 70 projects downward from the opening 74. Is done.

As shown in FIG. 7, inside the suction chamber 72, a cardboard sheet S which intersects the sheet feeding direction is provided.
A pair of support shafts 75, 76 extending in the width direction are arranged at predetermined intervals in the feeding direction with a perpendicular C passing through the center of rotation of the slitter blade 24 facing the slitting position. Support shaft 75 located on the upstream side in the sheet feeding direction
, The largest corrugated sheet S processed by the slitter
A first receiving roller 69 longer than the width dimension of the first receiving roller 69 is freely rotatably fitted to the outside, and a part of the outer periphery of the first receiving roller 69 is slightly outward (downward) from the opening 74 of the guide plate 73. It is set to protrude. Further, a second receiving roller 7 longer than the width of the largest corrugated cardboard sheet S to be processed by the slitter is provided on a support shaft 76 located on the downstream side in the sheet feeding direction.
The outer peripheral portion of the second receiving roller 70 is set so as to project slightly outward (downward) from the opening 74 of the guide plate 73. The outer peripheral ends of the pair of receiving rollers 69 and 70 separated in the sheet feeding direction stably support the cardboard sheet S. That is, by positioning the slitter blade 24 at the slitting position, the cutting edge of the slitter blade 24 is partially received in the opening 74 of the guide plate 73, and a receiving roller is provided on the downstream side in the feeding direction of the cutting edge. When the slitter blade 24 is rotated at a high speed of about 1.5 to 3 times the sheet feeding speed in this state, the horizontally supplied cardboard sheet S is slitted along the feeding direction. Is done.

Further, the first receiving roller 69 and the second receiving roller 70 are connected to the slitter blade 2 facing the slitting position.
4 is positioned so as to be as close to the slitter blade 24 as possible without interfering with the slitter blade 4. However, the first receiving roller 69 on the upstream side in the feeding direction is positioned so as to be as close to the perpendicular C as possible without causing any interference when the slitter blade 24 moves between the rest position and the slitting position. The slitter blade 24 is positioned near the slitting start position A of the cardboard sheet S by the slitter blade 24 facing the position. That is, in the second embodiment, the first receiving roller 69 has no peripheral groove. Further, the second receiving roller 70 on the downstream side in the feeding direction is positioned almost directly above the position B where the cutting edge of the slitter blade 24 facing the slitting position is separated downward from the corrugated cardboard sheet S, similarly to the first embodiment. are doing.

[0031]

Next, the operation of the slitter according to the second embodiment will be described. When slitting the corrugated cardboard sheet S, by positioning the slitter blade 24 from the rest position to the slitting position, the cutting edge of the slitter blade 24 is partially received in the opening 74 of the guide plate 73, and Receiving rollers 69 and 70 face upstream and downstream in the feeding direction of the blade edge. In this state, the slitter blade 24 is rotated at a high speed of about 1.5 to 3 times the sheet feeding speed, and the corrugated cardboard sheet S is fed horizontally so that the sheet S is slitted in the feeding direction. You. That is, with the pair of receiving rollers 69 and 70 projecting downward from the guide plate 73, the upper surface of the corrugated cardboard sheet S is supported at two places separated in the sheet feeding direction. Is slitted by

In this case, the first receiving roller 69 and the second receiving roller 70 are as close as possible to the slitter blade 24 within a range not interfering with the slitter blade 24 facing the slitting position with the perpendicular line interposed therebetween. Since the first receiving roller 69 is located near the slitting start position A by the slitter blade 24, when the slitter blade 24 slits the corrugated cardboard sheet S, the sheet S is surely prevented from floating. It is slitted. Also,
Since the pair of receiving rollers 69 and 70 project downward from the guide plate 73 and support the corrugated cardboard sheet S, the guide plate 73 does not become a resistance in feeding the corrugated cardboard sheet S.
In addition, both the receiving rollers 69, 70 are provided in the cardboard sheet S.
Since the sheet S is supported over the entire length in the width direction, the corrugated cardboard sheet S is stably and favorably slitted.

Next, when a command to change the order of the corrugated cardboard sheet S is issued, the slitter blade 24 is moved to the cutting position of the new order while the slitter blade 24 is moved to the rest position. The slitting of the new order corrugated cardboard sheet S can be performed only by positioning the corrugated cardboard sheet S at the slitting position. That is, it is not necessary to adjust the position of the sheet receiving device 71 itself when the order is changed, and the cost of the device can be reduced by omitting the moving mechanism and the like, and the structure of the device can be simplified. Also, the first
By arranging the slitter blade 24 below the feed line as in the embodiment, there is also an advantage that the liner in the corrugated cardboard sheet S can be prevented from peeling.

[0034]

[Modification of the second embodiment] In the second embodiment, a slitter head for supporting a slitter blade with respect to a slitter yoke is linearly moved up and down by a linear actuator such as a fluid pressure cylinder. You may make it reciprocate linearly between a stalling position and a rest position. In this case, the distance between the first receiving roller and the second receiving roller can be further reduced, and the slitting portion of the cardboard sheet can be stably supported. In the second embodiment, a suction chamber as a support member is disposed between a pair of frames. However, a receiving roller is directly rotatably disposed on a pair of frames (functioning as a support member) in which the chamber is omitted. You may.

[0035]

As described above, according to the slitter of the present invention, the sheet is supported at two places by the pair of receiving rollers separated in the sheet feeding direction with respect to the slitter blade facing the slitting position. Since the receiving roller on the upstream side in the feeding direction is located in the vicinity of the sheet slitting start position by the slitter blade, the sheet can be slit reliably and satisfactorily. That is, the cut end of the sheet can be sharpened, and the sheet quality can be improved.

In a configuration in which a pair of receiving rollers are arranged in a region extending over substantially the entire width of the sheet, only the slitter blade needs to be moved and adjusted when the order is changed, and a mechanism for moving and adjusting the receiving roller is required. do not do. Therefore, there is an effect that the device structure can be simplified and the cost can be significantly reduced. Further, since the sheet can be supported over substantially the entire length of the width, the slitting by the slitter blade can be performed stably.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a main part of a slitter according to a first embodiment of the present invention.

FIG. 2 is a rear view showing a main part of the slitter according to the first embodiment.

FIG. 3 is a side view showing the sheet receiving device of the slitter according to the first embodiment, partially cut away;

FIG. 4 is a vertical sectional front view showing a main part of the sheet receiving device in the slitter according to the first embodiment.

FIG. 5 is a bottom view showing the sheet receiving device of the slitter according to the first embodiment.

FIG. 6 is an explanatory diagram illustrating a relationship between a slitter blade and a receiving roller of the slitter according to the first embodiment.

FIG. 7 is a front view showing a slitter according to a second embodiment of the present invention, partially cut away;

FIG. 8 is a bottom view illustrating a sheet receiving device of a slitter according to a second embodiment.

[Explanation of symbols]

 12 slitter yoke 20 slitter head 24 slitter blade 44 suction chamber (supporting member) 46 guide plate 48 opening 50 opening 52 slit 58 first receiving roller 60 second receiving roller 69 first receiving roller 70 second receiving roller A slitting Start position B Position where the blade edge separates from the sheet C Vertical line S Corrugated cardboard sheet

Claims (5)

[Claims] 1. A slitter yoke (12) which is movable in the machine width direction intersecting with a sheet feeding direction of a sheet (S) and is stopped at an arbitrary position, and a slitter yoke (12) provided on the slitter yoke (12). A slitter head (20) capable of reciprocating between a slitting position and a rest position, and a disk rotatably supported by the slitter head (20) and rotationally driven in a feeding direction of a sheet (S) to be slitted. In the slitter provided with a slitter blade (24) in the shape of, the slitter yoke (12) is disposed on the opposite side to the slitter yoke (12) with the sheet (S) feeding line interposed therebetween, and can be freely moved in the machine width direction. A support member (44) stopped at, and a vertical line rotatably disposed on the support member (44) and passing through the rotation center of the slitter blade (24) facing the slitting position.
(C) and a pair of receiving rollers (58, 60) spaced apart in the feeding direction to support the sheet (S), and the receiving roller (58) on the upstream side in the feeding direction is the slitter. A slitter set to be located near a slitting start position (A) of a sheet (S) by a blade (24). 2. A receiving roller (60) on the downstream side in the feeding direction.
The slitter according to claim 1, wherein the cutting edge of the slitter blade (24) is located near a position (B) apart from the sheet (S). 3. The support member (44) is provided with each of the receiving rollers.
A guide plate (46) in which openings (48, 50) corresponding to (58, 60) partially project toward the slitter yoke (12) are disposed in parallel with the feed line, The slitter according to claim 1 or 2, wherein the slit (52) is formed along the feeding direction in the slit (52) in which the cutting edge of the slitter blade (24) facing the slitting position partially faces in a non-contact manner. 4. The pair of receiving rollers (58, 60) rotate following the feeding of a supported sheet (S).
3. The slitter according to any one of 3. 5. A slitter yoke (12) which is movable in the machine width direction intersecting with the sheet feeding direction and is stopped at an arbitrary position, and is provided on the slitter yoke (12), A slitter head (20) capable of reciprocating between a slitting position and a rest position, and a disk rotatably supported by the slitter head (20) and rotationally driven in a feeding direction of a sheet (S) to be slitted. A slitter provided with a slitter blade (24) in the form of a sheet, extends in parallel with the machine width direction on a side opposite to a side on which the slitter yoke (12) is provided with the sheet (S) feeding line interposed therebetween. A pair of receiving rollers (69, 70) that are separated in the feeding direction with a perpendicular (C) passing through the center of rotation of the slitter blade (24) facing the slitting position are rotatably disposed, and the feeding is performed. The receiving roller (69) on the upstream side in the direction is a slitter of the sheet (S) by the slitter blade (24). The sheet (S) is set so as to be located in the vicinity of the cutting start position (A), and the slitter blade (69) is supported by the pair of receiving rollers (69, 70) over a region extending over substantially the entire width of the sheet (S). 24. A slitter characterized in that the slitting of the sheet (S) according to 24) is performed.