JPS63312098A - Cutting section structure in continuous cutting stacker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a cutting section structure in a continuous stacking cutting device, and more specifically, a web is cut under tension, and the cut web is cut into a top knife body. This invention relates to a cutting section structure in a continuous stacking and cutting device that is configured to wrap the web around the circumferential surface of the web without causing any damage, and to reliably and quickly supply the cut web to the receiving port of the first conveyor.

[Prior art and its problems 1] Conventionally, in a device that slits a rolled base paper vertically and then cuts it horizontally to a predetermined length, and then stacks the cut webs continuously, it is difficult to stack them in an orderly manner. There were still problems with cutting in the previous process.

The problem with this cutting section is that in order to cut thin webs, the distance between the top knife and bottom knife must be adjusted accurately, and the cutting edge must always be sharp or it may be transported in a loose state. It is not possible to cut the web accurately. Furthermore, since the top knife body to which the top knife is attached rotates at high speed, the circumferential surface of the body becomes under negative pressure due to centrifugal force, and the cut web may wrap around the circumferential surface of the body. Furthermore, as mentioned above, there is the problem that the tip of the cut web cannot be reliably guided to the receiving port of the conveyor due to the centrifugal force of the top knife body, etc., and it is difficult to ensure that the final process is completed in an orderly manner. It was necessary to improve the accuracy of web cutting and to reliably transfer the cut web to the receiving port of the conveyor.

[Means for Solving the Problems] In view of the problems, the present invention provides a top knife attached to a rotatable top knife body and a bottom knife attached to a bottom knife body having a web passing table. A cutting device comprising a rotary cutter consisting of a rotary cutter, and a first conveyor, etc., which forms a receiving port for the cut web and is also provided with a pair of upper and lower tension rolls. The top knife body is configured to hold the tip and cut the web in a tensile state, and the bottom knife body is provided with protruding rough surfaces at appropriate intervals on the circumferential surface of the cylindrical top knife body, and the bottom knife body is configured to cut the web under tension. An air nozzle directed toward the receiving port of the first conveyor is disposed at an appropriate position on the table, and the pressure of the air jetted from the air nozzle can be freely adjusted in accordance with the rotating speed of the first conveyor. This paper aims to present a cutting section structure in a continuous cutting and accumulating device.

[Example] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is an overall layout diagram of a continuous cutting and accumulating device equipped with a cutting section according to an embodiment of the present invention, and mainly shows the axis attachment section of the winding base paper A, the tension detection section 1, the longitudinal direction cutting section 3 of the base paper, and the web transverse direction. It is composed of a cutting section 5, an overlap section 7, an accumulating section 9, and the like.

First, let me explain how to unwind the roll paper A.
For example, a plurality of roll-up base papers A, A, etc. are rotatably attached to support shafts (not shown), and each support shaft is equipped with a braking brake, and a tension detection roll is used to detect the tension of the unwound base paper. A control device (not shown) detects this and maintains an appropriate tension of the specified amount (not shown), and unwinds the roll paper A (configured).

For the purpose of cutting the rolled base papers A, A, etc. that have been rolled out as described above into a plurality of strips (referred to as web A in the following explanation when cut into strips), the longitudinal direction of the base paper A is cut. The cutting section 3 is constituted by opposed slitter knives, and is configured to rotate at an appropriately faster speed than the moving speed of the web A in any case.

FIG. 2 is a cross-sectional side view for explaining the lateral cutting section 5 of the web A, and the draw roll 51 that pulls out a plurality of webs A and supplies them to the lateral cutting section 5 has a cylindrical shape. The draw roll 51 has a similar cylindrical surface on the upper part to firmly hold the web A between the draw roll 51 and the draw roll 51. A nip roll 52 is provided, which is rubber-wrapped with the web A.
A plurality of spiral grooves 53 are provided on the left and right opposite sides of the center to prevent wrinkles from forming. Reference numeral 54 denotes a pair of feed rolls, and the feed rolls 54 are configured to lightly hold the web A in any case and feed it to the lateral cutting section 5 at an appropriately faster speed than the draw roll 51. .

As shown in FIG. 2, the rotary cutter 55, which constitutes the main part of the horizontal cutting section 5, is composed of a top knife 56 with a rotating blade and a bottom knife 57 with a fixed blade.The top knife 56 is cylindrical and rotatable. The top knife body 58 is provided with a suitable helical groove on the circumferential surface of the top knife body 58, so that the knives can be attached to the groove so that the spacing between the knives can be freely adjusted. Further, on the circumferential surface of the top knife body 58, protruding rough surfaces 5 are provided at appropriate intervals.
9, but in this embodiment, the protruding rough surface 59
In this structure, a plurality of grooves are formed at appropriate intervals on the circumferential surface of the top knife body 58, and an appropriate spring 59 is placed in the groove so that the radius of the spring 59 is exposed from the circumferential surface, and A spring 59 is embedded in an appropriately stretched state. - The purpose of the protruding rough surface 59 is to prevent the surface from becoming under negative pressure due to centrifugal force when the top knife body 58 rotates at high speed. By cutting the wind, the web A is prevented from wrapping around the circumferential surface of the top knife body 58, and the vicinity of the tip of the cut web A is moved faster than the web speed (rotation). The protruding rough surface 59 is connected to the surface of the web transfer table 61 by contacting the rough surface of the spring 59 wound around the top knife body 58. Although it is referred to as a spring, it is not limited to a spring.

The bottom knife 57 is attached to a bottom knife body 60 disposed below the top knife body 58, and the distance between the bottom knife 57 and the top knife 56 can be adjusted. Further, a web transfer table 61 installed in the web path of the bottom knife body 60 has its tip end connected to the first conveyor 7.
A plurality of air nozzles 62 are disposed oriented in two directions on the lower vertical bone of the web transfer table 1, and by ejecting air from the air nozzles 62, the surface of the web transfer table 61 is brought into a negative pressure state. The conveyor 71 is configured to forcibly feed the web A in two directions along the lower vertical bone. The air pressure is adjusted by an air valve 63 provided to adjust it in accordance with the rotating speed of the first conveyor 71.

The first conveyor 71 (7) in which the tip of the web A is rotating at an appropriately faster speed than the draw roll 51! 11, the web A is slid and moved by the rolls of the receiving lower 2, and at the same time, the leading end of the web A is held by the tension rolls 73 which are opposed to each other from above and below, and at the same time, the rotary cutter 55 is adjusted to the cutting position. Then, the tension roll 73 pulls the web A.
By pinching the tip and pulling it strongly, cutting is performed in the horizontal direction at the same time, allowing each knife to be cut without metal contact.
In addition, it is constructed so that sharp cutting can be performed without requiring a sharp cutting edge. The tension roll 73 is disposed on a fixed rack gear (not shown), and is moved to an appropriate position according to the cutting length by means of a handle provided at the end of the shaft of a moving gear. The web A that has been cut into sheets (hereinafter referred to as sheets A) is held between the belts of the first conveyor 71 and pinched while maintaining an appropriate distance between the following sheets A. It is conveyed in the direction of the rolls 74.

The pinch roll 74 is composed of two cylindrical rolls arranged oppositely and is configured to be movable to an appropriate position.
The sheet A should be firmly clamped and fed to the kicker roll section 75 at a speed of 71.

Next, to explain the overlap portion 7, firstly, the kicker roll 75 is connected to the first conveyor 7 during normal rotation.
The first conveyor 71 is configured to rotate at approximately the same speed as that of the first conveyor 71, or at a preferable speed. It is configured to rotate at a reduced speed.

The overlap roll has an upper overlap roll 84 with an arcuate recess 85 formed at an appropriate location on the circumference, and a plurality of claws 87.
The rolls 84 and 86 are configured to rotate synchronously so that the four parts 85 and the claws 87 coincide during rotation,
To explain its operation, the trailing end of the preceding sheet A is lifted up by a plurality of protruding claws 87 provided on the lower overlapping roll 86, and the following sheet held between the kicker rolls 75 is lifted up. A is the Kitzker roll 75
The lower surface of the rear end of the preceding sheet A is increased in speed,
It is inserted into the position lifted by the claw 87. That is, before the subsequent sheet A is finished being held by the kicker roll 75, it is transferred to the upper overlapping roll 84 disposed vertically opposite to each other.
and is held between the lower overlap rolls 86 to form an overlap shape.

At this time, the catch roll 89 of the second conveyor 88, which rotates at an appropriately slower speed than the first conveyor 71, firmly holds the sheet A from above and below via a belt, and the tip of the sheet A is held by the catch roll 89. Sheet A held between
The rear end portion is lifted by the pawl 87 of the lower overlap roll 86, and is configured to cooperate with the speed increase of the kicker roll 75 to prevent interference and quickly overlap. Yes, there is.
The pinch roll 74, the pinch roll 75, and the catch roll 89 are moved by turning a handle on a gear meshed with a fixed rack gear (not shown) so that they can be moved to appropriate positions corresponding to the length of the sheet A. It is configured as much as possible.

Next, to explain the configuration of the stacking section 9, the second conveyor 88 described above is provided with a timing roll 90 that operates preferably to supply the sheets A to the stacking section 9. The speed of the second conveyor 88, or a slightly slower preferred speed.

The stacking conveyor 91 is configured to rotate and supply overlapping sheets A to the accumulating conveyor 91, but when the set number of accumulating sheets is reached, the kicker roll 75 is rotated in accordance with the driving method of the above-mentioned kicker roll 75 (configured to increase/decelerate rotation). In detail, a revolving differential gear (not shown) increases the speed to release the overlap between sheets A, and decelerates it to create an appropriate gap between the preceding sheet A and the following sheet A. Similarly, the configuration is such that this is performed by a variable cam (not shown).

The sheets A overlapped on the stacking section 9, that is, the stacking conveyor 91, are configured to be fed to the second conveyor 88 via the timing roll 90. In this case, an appropriate shutter 92 (a) As shown in FIG. ), and the following sheets A are also sequentially accumulated on the conveyor 9.
1, but since they overlap, the configuration is such that they are accumulated sequentially from the bottom. (In the following description, it will be referred to as stacked paper A.) That is, when the stacked paper A on the stacking conveyor 91 reaches a set amount, the timing roll 90 decelerates as shown in FIG. At the same time, the shutter 92 (a) moves toward the discharge conveyor 93, and the shutter 92 (b)
is configured to project onto the accumulation conveyor 91 and stop at the position (a) where it can be accumulated. The shutter 92 is configured to rotate in synchronization with the rotary cutter 55 via an index (not shown), and is further configured to operate substantially simultaneously with the timing roll 90 to carry out the stacked paper A when the set stacking amount is reached. has been done. In addition, for the purpose of floating the stacked paper A during stacking and reducing the frictional resistance of the following paper, air should be ejected from a nozzle 94 disposed facing downward above the starting end of the stacking conveyor 91 (if configured). , the paper can be stacked with the edges aligned in an orderly manner.This is more effective when a large amount of paper is stacked or when the paper is thin.

[Advantageous Effects of the Invention 1] As described above, the present invention provides a rotary cutter 55 consisting of a top knife 56 attached to a rotatable top knife body 58 and a bottom knife 57 attached to a bottom knife body 60 having a web passing table 61. ,
A first conveyor 7 that forms the lower longitudinal ribs 2 of the cut web A and is also provided with a pair of upper and lower tension rolls 73.
The cutting device 5 is configured to sandwich the tip of the web A with a tension roll 73 attached to the first conveyor 71 and cut the web A in a tensioned state, and has a cylindrical top knife. Protruding rough surfaces 59 are provided on the circumferential surface of the body 58 at appropriate intervals, and furthermore, air nozzles 62 are arranged at appropriate positions on the web transfer table 61 of the bottom knife body 60 to direct the lower vertical bone 2 of the first conveyor 71. The structure of the cutting section in the continuous cutting and accumulating device is such that the pressure 98 of the air ejected from the air nozzle 62 can be freely adjusted in accordance with the rotating speed of the first conveyor 71. In order to ensure that the final step of stacking in the continuous cutting and stacking device is carried out in an orderly manner, it is absolutely necessary to improve the precision of web cutting and to ensure that the cut web is longitudinally waved to the vertical slot of the conveyor. However, in order to cut thin webs with conventional cutting equipment of this type, the distance between the top knife and bottom knife must be adjusted very delicately, and the cutting edge must always be sharp or it may be transported in a loose state. Furthermore, since the top knife body to which the top knife is attached rotates at high speed, the circumferential surface of the body is under negative pressure due to centrifugal force, causing the cut web to be cut on the circumferential surface of the body. In addition, as mentioned above, there were problems such as the tip of the cut web was not reliably guided to the vertical bone opening of the conveyor due to the centrifugal force of the top knife body, etc. However, in the present invention, The tip of the cut web A is slid and moved by the roll of the vertical lower 2 of the first conveyor +-71 which is rotating at an appropriately faster speed than the draw roll 51, and the tip of the web A is moved from above and below. It is adjusted so that it is at the cutting position with the rotary cutter 55# at the same time as it is held by the opposing tension rolls 73. By cutting, each knife can be cut sharply without metal contact (and without requiring sharpness of the cutting edge).Moreover, the protruding rough surface provided on the circumferential surface of the top knife body 580 (spring)
Since the convex portion 59 cuts the wind, the surface of the top knife body 58 will not be in a negative pressure state, and the web A will not wrap around the circumferential surface of the top knife body 58.

In addition, a plurality of air nozzles 62 are disposed at appropriate locations on the web passing table 61 with their tips directed toward the receiving lower 2 direction of the first conveyor 71. The web A is forcibly supplied to the vertical lower 2 by creating a negative pressure state on the surface, and the air pressure is adjusted by an attached air valve 63 to correspond to the rotating speed of the first conveyor 71. Since the web A is always guided to the vertical lower 2 with a predetermined air pressure, it has various effects that are truly remarkable.

[Brief explanation of the drawing]

FIG. 1 is an overall layout diagram of a continuous cutting and accumulating device equipped with a cutting section according to an embodiment of the present invention. FIG. 2 is a cross-sectional side view of the cutting section. Figure 3 is a side view of the overlap part. FIGS. 4 and 5 are side views for explaining the accumulation section. 5... Lateral cutting part 55... Rotary cutter 56... Top knife 57... Bottom knife 58... Top knife body 59... Protruding rough surface (spring) 60... Bottom knife body 61... Web transfer table 62... Air nozzle 71... First conveyor 72... Vertical bone lower 3... Tension roll A... Sheet

Claims (4)

[Claims] (1) A rotary cutter consisting of a top knife attached to a freely rotatable top knife body and a bottom knife attached to a bottom knife body having a web passing table, and a rotary cutter that forms a receiving opening for the cut web, and from a pair of upper and lower knives. A continuous cutting stack comprising a first conveyor or the like equipped with a tension roll attached to the first conveyor, the leading end of the web being held between the tension rolls attached to the first conveyor, and the web being cut in a tensioned state. Cutting section structure in the device. (2) The cutting section structure in the continuous cutting/accumulating apparatus according to claim 1, wherein protruding rough surfaces are provided at appropriate intervals on the circumferential surface of the cylindrical top knife body. (3) The cutting section structure in the continuous cutting and accumulating apparatus according to claim 1, wherein an air nozzle directed toward the receiving port of the first conveyor is disposed at a proper position on the web transfer table of the bottom knife body. (4) Cutting in the continuous cutting and accumulating device according to claims 1 and 2, wherein the pressure of the air ejected from the air nozzle is adjustable in accordance with the rotating speed of the first conveyor. Departmental structure.