JPH05253897A - Cutting off and piling up device of punched sheet - Google Patents

Abstract

PURPOSE:To pile up punched sheets of corrugated cardboard, cardboard or the like on a piling up hopper uniformly with no damage of sheets due to collision. CONSTITUTION:An upper cutter 19 and a lower cutter 20 are provided respectively on the upper side and the lower side of a sheet transferred continuously above a sheet piling up hopper unit 6, so as to cut off an useful portion 4 of the sheet from a front end clip portion 17 of the sheet. After cutting off the clip portion 17, the front end of the sheet is holded between a sheet presser 35 and a sheet receiver 34 provided on the cutters respectively, and the upper cutter 19 is circularly moved with an upper link 24 attached with the upper cutter 19, and the lower cutter 20 is reciprocally swung on an arc with a lower link 26 attached with the lower cutter 20, thereby the sheet is carried up to a separating stopper, and at the same time the holding power is released to drop and arrange the sheet in the hopper unit 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting and separating punched sheets, which is applied to a high-speed punching machine for flat plates such as corrugated cardboard and cardboard.

[0002]

2. Description of the Related Art FIGS. 5 and 6 are schematic structural explanatory views of a conventional punching machine. FIG. 5 is a high-speed rotary punching machine for continuously punching while traveling by a rotary die cutter, and FIG. 2 illustrates an example of a low-speed punching machine that punches a sheet that is intermittently fed by a running state in a stopped state. As shown in FIG. 5, the high-speed rotary punching machine rotates a knife cylinder 1 having a knife mounted on the outer peripheral surface thereof and an anvil cylinder 2 arranged in parallel with the knife cylinder 1 so as to be opposed to each other in synchronization with each other. A punching section 5 for performing a predetermined punching process on a sheet 3 traveling between two, and a conveyor 7 for transporting a sheet (product) 4 punched by the punching section 5.
a, 7b, a stacking hopper unit 6 for sequentially dropping and stacking sheets (products) 4 loaded from the conveyor 7b, and a discharge conveyor 8 for carrying out the sheets 4 to the outside.

The sheet 3 which has been intermittently fed in from the preceding step (not shown) is carried into the punching section 5, punched into a predetermined shape by the rotary rotation of the rotary die cutter, and then delivered to the conveyors 7a and 7b. Then, the final step is carried to the stacking hopper section 6. The stacking hopper portion 6 supports a pair of front and rear ledges 9a, 9b for supporting the loaded sheets 4.
And a front wall (front stopper) 10 provided upright at the downstream end, and the sheet 4 loaded from the conveyor 7b.
Contact the front wall 10 and are stacked on the ledges 9a and 9b. When the number of sheets 4 reaches a preset number,
It is delivered to the discharge conveyor 8 located below and discharged in bundles.

Next, as shown in FIG. 6, the low speed flat plate punching machine has a sheet feeding section 11, a punching section 12, a scrap collecting section 13, and a stacking hopper section 6.
And the sheet front end grip recovery unit 14 and the like. The sheets 3 stacked in the sheet feeding unit 11 are sequentially conveyed one by one from the lowermost sheet and are gripped at the front end by the gripper 16 provided on the endless chain 15, and then punched out by the punching unit 12 and scraps. It is transferred to the unit 13 and the stacking hopper unit 6. In the punching section 12, the sheet 3 is die-cut into a product, and in the scrap removing section 13, the sheet (product) 4 is left with the sheet front end gripping section 17 and the nick section 18 as shown in FIG. The sheet front end grip portion 17 and the nick portion 18 are cut in the stacking hopper portion 6 in the next step,
Only the sheet (product) 4 is dropped and stacked on the ledges 9a and 9b of the hopper. In addition, the seat front end grip portion 17
While being gripped, the sheet is further conveyed to the next step and discharged at the sheet front end grip collecting section 14. When the number of sheets (products) 4 reaches a preset number, they are delivered to the discharge conveyor 8 located below by discharging the ledges 9a and 9b and discharged in bundles. As described above, there are two types of conventional punching machines as typical ones.

In the former high-speed rotary punching machine, the punched sheets (products) 4 are conveyed by the conveyors 7a and 7b and fed into the stacking hopper 6 as they are, so that the front ends of the sheets collide with the front wall 10 of the hopper 6. However, there is a defect that the tip of the sheet is crushed or bent. In addition, there is a drawback that the recoil of the collision disturbs the falling posture of the sheets into the hopper, and the stacked sheets become uneven. On the other hand, the latter low-speed flat plate punching machine has drawbacks such as low productivity and low productivity because the sheet is intermittently run, punching in a stopped state, scrap removal and nick cutting are performed.

[0006]

As described above, the sheet stacking apparatus applied to the sheet punching machine includes a high-speed punching machine for continuously punching like a rotary die cutter, and a flat upper and lower die. It is for low-speed punching machines that perform punching intermittently. The former device has a high productivity because it punches continuously transferred sheets at a high speed, but since the sent sheets collide with the front wall 10 of the stacking hopper 6 as they are, the higher the speed, the more the sheets are damaged. (Crushing and bending) became severe, and the rebound of the sheets increased, and the alignment was poor, and there was a drawback that the bundles could not be aligned. In addition, the length of the machine is long because the conveyor is made long as a means for reducing the sheet speed. On the other hand, the latter low-speed flat plate punching machine processes the intermittently transferred sheet in a stopped state, so there is no damage to the sheet due to collision and it is possible to align the sheets, but the punched sheet is conveyed intermittently. However, it can only be used in low-speed punching machines, and has the drawback of low productivity. The present invention is intended to solve the above conventional problems.

[0007]

Therefore, the present invention is located in a downstream process of a flat plate punching machine and punches corrugated cardboard, cardboard, etc., which is composed of a gripping part and a useful part (product) connected to each other by a nick part. Cutting and separating punched sheets and stacking them In a cutting and separating and stacking device for punched sheets, upper and lower sheets are stacked above and below the sheet stacking hopper to separate useful parts from the front end grips of the sheets that are continuously running. Upper mold tool and lower mold tool arranged by sandwiching, after cutting the nick portion of the grip portion of the sheet front end, a sheet presser provided at the rear of the upper mold tool that clamps the sheet front end, and a lower mold tool A sheet receiving part provided at the tip and the upper die blade are attached, and the upper die blade has a link rotating mechanism having an upper link for making a circular motion above the sheet stacking hopper portion, and the lower die blade reciprocates in an arc shape. Rock Crank swinging mechanism with a link,
It is composed of a front wall of the hopper portion, and a sheet separation stopper provided on the upper portion of the front wall and inclined downward, which serves as means for solving the problem.

[0008]

[Operation] A punching sheet such as a corrugated cardboard or a cardboard, which is composed of a grip portion and a useful portion (product sheet) connected to each other at the nick portion, is cut and separated by the engagement (engagement) of the upper and lower die blades. , The front end of the useful part (product) is clamped by the sheet retainer of the upper die cutter and the sheet retainer of the lower die cutter, the sheet speed is reduced and sent to the downstream side, and the sheet retainer moves diagonally upward due to the circular motion of the sheet retainer. Ascending and releasing the sandwiching of the sheets by the arcuate reciprocating motion of the sheet receiver, the sheet is separated from the upper and lower cutters via the sheet separation stopper provided on the front wall (front stopper) of the stacking hopper, and at the same time, Sheets (products) are stacked along the inclined surface of the stopper so as to come into contact with the front wall (front stopper). After separating the useful part (product sheet) from the punched sheet during high-speed running as described above, the sheet retainer of the upper die blade and the sheet receiver of the lower die blade clamp the front edge of the sheet (product), and the upper die The sheet rotation speed is reduced by the link rotation mechanism of the blade and the crank swing mechanism of the lower die,
While loosening the clamping force, it guides to the sheet separation stopper provided on the upper part of the front wall of the hopper, separates it from the upper and lower dies along the inclined surface of the sheet separation stopper, and stacks it in contact with the front wall (front stopper). Can be stacked.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments of the drawings. FIGS. 1 to 3 show an embodiment of a sheet cutting / separating / stacking device for a high-speed flat sheet punching machine according to the present invention. Further, FIG. 4 shows an example of a punched sheet. In the figure, 19 is an upper die blade, 20 is a lower die blade, and 19 is an upper die blade.
1. The lower die cutter 20 is fixed to the lower stay 22 so that the cutting edge can engage like scissors. The upper and lower dies 19 and 20 can be fixed at arbitrary positions in accordance with the cutting point of the nick portion 18 of the punched sheet of FIG. Further, the upper stay 21 is attached to an upper link 24 connecting the tips of the rotary arms 23a and 23b, and the upper die 1
9 is a downward rotation arm 23 by the upper link 24.
A circular motion is performed along the rotation loci of a and 23b.
On the other hand, the lower stay 22 is attached to a lower link 26 connecting the tips of the swing levers 25a and 25b, and the lower die cutter 20 is kept facing upward by the lower link 26.
The reciprocating motion is performed along the arc-shaped reciprocating locus of 25b.

FIG. 2 shows an embodiment of the driving means for the upper and lower mold tools 19, 20 in which the rotary arms 23a, 23b and the swing levers 25a, 25b are connected.
7 is connected with a crank gear 29 for driving the lower die cutter 20 via an intermediate gear 28 at a ratio of 1: 1. The crank arm 30 repeats the crank swing motion by the bearing roller 31 of the crank gear 29, and reciprocally drives the lower die cutter 20 in a downward arc shape via the lever shaft 32 and the swing levers 25a and 25b. The sheet separation stopper 33 is located above the front wall (front stopper) 10 of the stacking hopper 6 and is provided in the gap between the lower die blades 20 that reciprocate in a downward arc. Further, there is a sheet receiving portion 34 at the tip of the lower die 20 and the sheet receiving portion 34 is the upper die 1
Along with the sheet retainer 35 provided at the rear portion of the sheet 9, the nick portion 18 of the sheet front end grip portion 17 holds the front end portion of the sheet (product) after cutting and transfers the sheet to the sheet separation stopper 33.

Next, the operation of the embodiment constructed as described above will be described with reference to FIG. 3. The seat 3 gripped by the gripper 16 provided on the endless chain 15 is as follows.
The nick portion 18 connecting the sheet front end grip portion 17 and the useful portion (product) 4 is cut by the upper and lower knives 19 and 20 at a predetermined cutting position of a point without stopping while advancing in the direction of the arrow and after cutting, While the front end of the sheet is sandwiched between the sheet retainer 35 of the upper die cutter 19 and the sheet receiving portion 34 of the lower die cutter 20, the circle A of the sheet retainer 35 by the link rotation mechanism is used.
The circular movement of the sheet receiving portion 34 and the reciprocating movement of the downward arc B by the crank swing mechanism of the sheet receiving portion 34 transfer the sheet to the sheet separation stopper 33 provided on the front wall (front stopper) 10 of the stacking hopper 6. Foot 3
The nipping force of the sheet front end by 5 and the sheet receiving portion 34 is released, and the transported sheet (product) 4 falls along the inclined surface of the sheet separation stopper 33 and abuts on the front wall (front stopper) 10. The stacks are stacked in a state and sequentially stacked on the ledges 9a and 9b in the stacking hopper 6.

Further, the upper die 19 is rotated upward while the sheet (product) 4 is transferred from the cutting point a to the separation point b by the drive gear 27, and the original die is rotated every rotation in response to the loading of the next sheet. Return to position. The lower die 20 is transported by the swing mechanism of the crank gear 29 and the crank arm 30 from the cutting point a to the separation point b while braking the sheet (product) 4, and after reaching the maximum movement point c, is inverted. At high speed to return to the original position and wait. Hereinafter, each of the above operations will be repeated for the conveyed sheet 3.

[0013]

As described in detail above, according to the present invention, the front end of the useful portion (product sheet) cut from the grip portion is clamped by the sheet retainer of the upper die cutter and the sheet receiver of the lower die cutter, and decelerated. And guide it while loosening the clamping force, and separate it from the upper and lower mold knives by the sheet separation stopper, and drop the useful part along the inclined surface of the sheet separation stopper to the front wall (front stopper). The sheets (product) are aligned in the hopper so that the sheets (product) are aligned in contact with each other. Therefore, the front end portions of the sheets (products) can be stacked without damaging (crushing or bending), and the unevenness of the sheets (products) can be eliminated. As a result, the product quality can be improved and a complicated punched sheet can be manufactured, and the productivity can be greatly improved by speeding up the apparatus.

[Brief description of drawings]

FIG. 1 is a sectional view of a punched sheet according to an embodiment of the present invention.
It is a sectional side view of a stacking device.

FIG. 2 is a perspective view showing a drive mechanism of the upper and lower mold knives in FIG.

FIG. 3 is an explanatory view of the operation of the apparatus of FIG.

FIG. 4 is a plan view showing an example of a punched sheet.

FIG. 5 is a side view showing an example of a conventional high-speed rotary punching machine.

FIG. 6 is a side view showing an example of a conventional low-speed punching machine.

[Explanation of symbols]

 3 sheet 4 sheet (product) 6 sheet stacking hopper section 9 ledge 10 front wall (front stopper) 15 endless chain 16 gripper 17 sheet front end gripping section 18 nick section 19 upper die blade 20 lower die blade 21 upper stay 22 lower stay 23 rotation Arm 24 Upper link 25 Swing lever 26 Lower link 27 Drive gear 28 Intermediate gear 29 Crank gear 30 Crank arm 31 Bearing roller 32 Lever shaft 33 Seat separation stopper 34 Seat receiving part 35 Seat retainer 36 Seat path line

Claims (1)

[Claims] 1. A punching machine which is located in a downstream process of a flat plate punching machine and which is formed by cutting and separating punched sheets such as corrugated paper and cardboard, which are composed of a grip portion and a useful portion (product) connected to each other by a nick portion. In the cutting / separation / stacking device for punched sheets, an upper die cutter arranged above and below the sheet stacking hopper portion so as to separate the useful portion from the sheet front end gripping portion which is in the course of continuous traveling, Lower die blade, after cutting the nick portion of the grip portion of the sheet front end, a sheet retainer provided at the rear portion of the upper die blade that holds the sheet front end, and a sheet receiving portion provided at the tip of the lower die blade, Crank swing with a link rotation mechanism that has an upper link attached to it and that has an upper link that causes the same to perform a circular motion above the sheet stacking hopper, and a lower link that swings the lower tool back and forth in an arc shape. mechanism, A cutting / separating / stacking device for punching sheets, comprising a front wall of the hopper portion, and a sheet separation stopper provided on an upper portion of the front wall and inclined downward.