JPH0958928A - Automatic picking device of folded accumulation of sheet-shaped material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the folded shape of a product by providing a servo motor to elevate/lower an elevator finger and a servo motor to oscillate a turn plate to improve the stop accuracy of the elevator finger. SOLUTION: An elevator finger 10 is provided with a table part on which a folded accumulation T is loaded. A clamp finger 20 is arranged at the position where a rear upper edge of the folded accumulated article T is pressed. A count finger 30 is arranged so as to be driven onto the upper surface of the folded accumulation T, and a pivot is oscillatingly fitted to a slide post 2. A support finger 50 is fitted to the position not to be interfered with the elevator finger 10 in an advancing/retractable manner in the longitudinal direction. A turn plate 60 is oscillatingly fitted to the pivot. A driving mechanism 15 consists of a servo motor 80 to elevate/lower the elevator finger 10, and a servo motor 81 to oscillate the turn plate 60. The stop accuracy of the elevator finger is excellent, the product loss is reduced, and the yield is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material such as a relatively thin paper such as a tissue paper or a non-woven fabric which is continuously fed in the longitudinal direction and cut in the lateral direction to separate the cut pieces. The present invention relates to an automatic device for taking out a folded stack of a sheet-like material for taking out the folded stack in a fixed quantity without disturbing the stacked stacks by alternately zigzag folding and accumulating.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 5-81510 discloses an example of a conventional automatic take-out device for folding and accumulating sheet materials.
There is one described in the publication, which is configured as follows. The foldable stack is placed on a pair of slide posts that are erected so as to face both ends in the longitudinal direction of the foldable stack, and a slide bar that is laid vertically so as to slide vertically along the slide posts. An elevator finger to be placed, a counting finger attached to the swing arm so as to be driven intermittently from the front of the elevator finger to the upper surface of the stack, and a slide block that can slide up and down along the slide post. A support finger that is installed upright on a support bar that moves so that it can move forward and backward without interfering with the elevator fingers, and when an elevator finger on which a fixed amount of folding aggregates is placed begins to descend. A clamp finger in combination with an elevator finger for holding the edge, said elevator finger On the way of descending, a turn plate attached to a pivot shaft provided in front of it at the height of the upper surface of the folding assembly, and having a vacuum hole and an air blowing hole, and an elevator at a height corresponding to the turn plate. It is composed of an air blowing hole arranged at the rear of the finger, and a carry-out conveyor provided at the same height as the mounting surface of the elevator finger that has descended most.

In this conventional example, the elevator finger, the turn plate, the counting finger, and the support finger are driven by the rotational driving force of the motor, and the cam is used to change the driving force into a linear movement or a swinging movement. ing. By controlling the clutch to engage and disengage via a power transmission system, the elevator fingers are lowered to determine the lowered position, the turn plates and counting fingers are oscillated, and the support fingers are moved forward and backward. are doing.

[0004]

However, in such a conventional apparatus for automatically taking out the folded stack of sheet-like materials, the elevator fingers are intermittently lowered by the on / off control of the clutch, so that the clutch slips. The surface error causes the elevator fingers to stop with poor accuracy, the folded shape of the product placed on the elevator becomes poor, and there are a considerable number of product losses due to the folding back of the upper part of the product, which reduces the yield. ing. Further, it is necessary to adjust the clutch torque due to the difference in bulk depending on the basis weight and the crepe ratio of the base paper, and this work requires considerable skill. Furthermore, since the support fingers are operated with a cam interposed, the movement of the support fingers is restricted depending on the number of products taken out, and the turn plate was also operated with a cam interposed. Other than changing and responding to, only static static movement can be made.

In view of such circumstances, the present invention improves the stopping accuracy of elevator fingers, improves the folded shape of products on the elevator, reduces product loss, and improves yield.
It is an object of the present invention to provide an automatic take-out device for a folded stack of sheet-shaped material, which allows anyone to easily adjust the torque and always make adjustments that suit the situation regardless of the size of the base paper. .

[0006]

A device for taking out a folded stack according to claim 1 is a device for automatically taking out the folded stacks which are stacked by being zigzag-folded in a continuous manner by combining two sheets. A pair of slide posts which are erected so as to be opposed to both ends in the surface length direction of the folded stack, and a slide bar which is horizontally installed so as to vertically slide along the slide posts. An elevator finger to be placed, a clamp finger combined with the elevator finger to hold the upper rear edge of the folded stack when the elevator finger on which a fixed amount of the folded stack starts to descend, and an intermittent finger from the front of the elevator finger. The count finger attached to the swing arm so that it is driven into the upper surface of the folding aggregate, and the slide post. And a support bar that is erected on a support bar that is mounted so as to slide back and forth on a slide block that can slide up and down, and that moves forward and backward so as not to interfere with the elevator finger, and a fold on the elevator finger while it is descending. A turn plate attached to a pivot shaft provided above the stack at a height above the stack and having a vacuum hole and an air blow hole, and an air blower disposed at the rear of the elevator finger at a height corresponding to the turn plate. A nozzle, a carry-out conveyor provided at the same height as the mounting surface of the elevator finger that has descended most, and a first servomotor that raises and lowers the elevator finger,
It is characterized in that it comprises a second servomotor for swinging the turn plate, and an air cylinder attached to an appropriate position of the support finger to move the support finger forward and backward.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an embodiment to which an automatic take-out device for a sheet-shaped folded stack according to the present invention is applied, and FIG. 2 is a sectional side view of the same. As shown in FIGS. 1 and 2, in the present embodiment, a pair of standing frames 1 and a pair of folding rolls R1, which are rotatably attached to the front and rear of the inner upper portions of the pair of frames 1, are arranged. R2
And a pair of slide posts 2 that are erected inside the pair of frames 1 so as to face both ends of the folding stack T in the surface length direction (length direction), and along the pair of slide posts 2. Elevator bar 3 installed horizontally to move up and down
And an elevator finger 10 which is intermittently planted in the elevator bar 3 and is provided with a base portion on which the folding stack T is placed, and a carry-out conveyor 70 which is provided at a height at which the elevator finger 10 is most lowered. , This elevator finger
It is composed of a related mechanism 4 that operates according to the movement of 10, and a drive mechanism 15 that drives the elevator fingers 10 and the related mechanism 4.

The related mechanism 4 is provided with a clamp finger 20 which is arranged at the rear of the elevator finger 10 and at a position for pressing the upper rear edge of the folded stack T, and an intermittent mechanism from the front of the elevator finger 10. A counting finger 30 which is arranged so as to be driven onto the upper surface of the folded stack T and whose pivot is swingably attached to the slide post 2, and an elevator finger 10 which is above the pair of slide posts 2 and which is above the pair of slide posts 2. The support finger 50 and the elevator finger 10 which are mounted so as to be able to move forward and backward at a position where they do not interfere with each other are in the middle of descending, and the folding aggregate T
The turn plate 60 swingably attached to a pivot shaft provided above the height of the upper surface of the
It is composed of 60 and an air blowing nozzle 75 arranged at a height corresponding to the rear of the elevator finger 10. The drive mechanism 15 is attached to the servo motor 80 for moving the elevator finger 10 up and down, the servo motor 81 for swinging the turn plate 60, and the support finger 50 at appropriate positions to move the support finger 50 forward and backward. It is composed of an air cylinder 54.

As shown in FIGS. 2-3, elevator fingers are shown.
A large number of 10 are planted in an elevator bar 3, and a slide block 3a is arranged below the elevator bar 3 on a slide post 2 so as to be vertically movable.
And the slide block 3a are connected by a pair of racks 5, and a gear 6 meshing with the pair of racks 5 is fixed to a shaft 7. An input gear 8 is fixed to the center of the shaft 7, and a gear 9 meshing with the input gear 8 is fixed to the rotary shaft of a servomotor 80 of the drive mechanism 15.

As shown in FIG. 4, the clamp finger 20 is erected on the rear side of the elevator finger 10, and the lower portion of the clamp finger 20 is penetrated by the clamp guide 21.
The protrusion pin 20b provided in the middle of the clamp finger 20 protrudes from the curved slot 22 of the clamp guide 21,
The curved slot 22 is formed in such a shape that the folding ends 20a at the uppermost position and the lowermost position of the elevator finger 10 deviate from the edge of the folded stack T, and in the middle portion of the elevator finger 10, the folded end 20a is caught on the edge of the stack T. Has been done. The upper part of the clamp finger 20 is bent to form a bent end 20a. The solenoid 23 arranged near the lower end of the clamp guide 21 has its protruding pin 23a engaged with the notch 20c of the clamp finger 20. Reference numeral 24,
25 and 26 are coils.

As shown in FIGS. 1 and 5, a counting finger is provided.
A large number of 30 are intermittently attached to the support bar 31. Both ends of the support bar 31 are attached to a swing arm 32, and the arm 32 is connected to another swing arm 34 via a fulcrum shaft 33, and a tension spring 35 is connected to a lower end portion of the swing arm 34 so that the swing arm 34 can swing. A cylinder 49 is arranged at the lower end of the arm 34 and above the tension spring 35, and a piston 48 of the cylinder 49 is arranged at a position to push the lower end of the swing arm 34. Reference numeral 47 is a shock damper. As shown in FIGS. 2 and 5, the hook 36 of the counting finger 30 is engaged with the claw 29 of the counting finger 30 to hold the counting finger 30 in the inoperative position. A sector 38 is pivotally attached to the hook 36 via a fulcrum pin 37, one end of the sector 38 is connected to a protrusion of a solenoid 39, and the other end pivotally attaches a ratchet pawl 43. Then, the ratchet wheel 42 fixes the cam 41 coaxially therewith, and the cam roller 40 supported at the lower end of the hook 36 engages with the cam 41. Reference numeral 45 is a ratchet wheel bar, the rear end of which is connected to a cam ring 46. With this configuration, as shown in FIG. 5, the claws of the counting finger 30 are
Extend the piston 48 of the cylinder 49 and push the arm 34 until the position where the 29 engages with the hook 36.
30 returns (returns to home position). Then, the number of folded sheets is counted up, and when the accumulated number is reached, the ratchet wheel 42 rotates, the cam 41 pushes up the cam roller 40, and the claw 29 of the counting finger 30 hooks.
Removed from 36, tension spring 35 causes counting finger 30
Moves to the driving position indicated by the dashed line.

As shown in FIGS. 2 and 6, the support finger 50 has a slide box 52 that can slide up and down along a pair of slide posts 2 with a slide shaft 52 extending and fixed substantially horizontally rearward. A large number of support bars 53 are installed upright intermittently along the shaft 52 so as to be able to move forward and backward, and rods 55 are provided at both ends of the support bar 53.
Is connected to one end of the rod 55, and a lever 56 is pivotally attached to the other end of the rod 55 and swingably attached to a pivot shaft 57.
An air cylinder 54 of the drive mechanism 15 is provided at the rear end. In particular, as shown in FIG. 1, the support finger 50 is
The elevator fingers 10 and the counting fingers 30 are arranged at intervals such that they do not interfere with each other. In this way,
When the air cylinder 54 expands and contracts, the support finger 50 moves back and forth.

As shown by reference numeral (a) in FIGS. 2 and 7, the turn plate 60 is laterally provided between the pair of frames 1 and is supported by the pivot shaft 62. Since the chain wheel 63 fixed to the pivot shaft 62 and the chain wheel 83 fixed to the shaft of the servo motor 81 of the drive mechanism 15 are wound around the chain 84, they are reciprocally moved circularly by the servo motor 81. . Then, as indicated by reference numeral (b) in FIG. 7, the turn plate 60 has a vacuum chamber communicating with the suction source and an air blowing chamber communicating with the pressurized air source, and faces the folding stack T. A vacuum hole 60a and an air blowout hole 60b are provided on each side. As shown in FIG. 2, the air blowing nozzles 75 are arranged behind the elevator fingers 10 at the same height as the turn plate 60 and in a horizontal row between the pair of frames 1 behind the elevator fingers 10.

The servomotor 80 of the drive mechanism 15 is
Position x of the elevator finger 10 that changes with time t
(T) and the speed Vx (t) of the elevator finger 10 at this position x (t) can be used as a response characteristic in advance and a specified value can be input, and another servo motor 81 of the drive mechanism 15 causes the elevator finger 10 to move. Depending on the position x (t), the angle θ (x
(T)) and the angular velocity ω (x at this x (t)
(T)) can be used as a response characteristic in advance and a specified value can be input. That is, the position x of the elevator finger 10
The servo motor 81 operates with (t) as an operation reference.

With the above-described structure, as shown in FIG. 2, when a series of sheet materials P1 and P2 that are not transversely cut are supplied to the pair of folding rolls R1 and R2, the roll surface While being held by suction or the like, they are laterally cut by the cutting portions C1 and C2. Here, the cut pieces of paper are held in the vicinity of the folding rolls and travel to the contact portion between the rolls R1 and R2 without being separated from the sheet-shaped base paper that follows in the running direction.
This sheet-shaped base paper is cut when the cutting blades protruding from the peripheral surface of the roll come into contact with the respective cutting portions, but the same number of cutting blades and cutting portions are alternately mounted on the peripheral surface of the roll. ,
The cutting edges of one roll are arranged out of phase so as to align with the cutting portion of the other roll. Therefore, the two cut pieces of paper that meet at the contact portion are staggered so that the cut edge of the other piece of paper is in the middle of one piece of paper. The two pieces of paper thus combined are adsorbed on the surface of the roll and are held while advancing downward, while being peeled off from the roll surface by the folding bar F1 or F2 and at the same time from above by the folding bar. It is pressed down and folded onto the elevator fingers 10 to form a folded stack T. In addition, in order to make it easier to peel off the paper piece by the folding bars F1 and F2, a groove g is formed on the roll surface.
Is cut.

Next, the clamp finger 20, the count finger 30, the support finger 50, and the turn plate 60, which are the main parts of the elevator finger 10 and the related mechanism 4, are shown.
Will be described. Figure 8 is a time chart of the main components,
FIGS. 9 to 16 are explanatory views of each operation of the main parts. FIG. 9 is a fixed amount extraction start position, FIG. 10 is driving with a counting finger, FIG. 11 is lowering of an elevator finger on which an aggregate is placed, and FIG. 12 is with a turn plate. Adsorption / Blowback, FIG. 13 swivel of the turn plate, FIG. 14 discharge of the folded stack, FIG. 15 re-elevation of the elevator finger, FIG.
Indicates the return of the elevator fingers. The symbols A to H in the following description are those shown in FIG.

During the period indicated by symbol A, the elevator fingers 10 are folded and accumulated one after another on the elevator fingers 10, and the elevator fingers 10 are accurately lowered by a predetermined amount for each folding by the servomotor 80, and the number of the sheets is set. At the same time, the support finger 50 retreats and returns to the fixed position. Then, when the number of stacked sheets stacked on the elevator fingers 10 reaches a predetermined number, the paper which is about to be zigzag-folded into a V-shape as shown in FIG. The elevator fingers 10 are momentarily lowered by a certain amount to widen. Then, after counting up the number of stacked sheets, the solenoid 39 is energized to ratchet wheel 4
2. Rotate the cam 41. After the cam 41 has rotated, the cam roller 40 is pushed up after a certain period of time, the hook 36 is disengaged, and as a partition on the upper surface of the folded stack T,
As shown in FIG. 10, the counting finger 30 is an air cylinder.
The succeeding portion which is driven into 54 and is about to be zigzag folded above this is temporarily received to prevent it from overlapping the accumulated portion T which has already been zigzag folded and accumulated. It should be noted that, by setting the above-mentioned fixed time, the variation of the electric signal of the electric transmission system is suppressed, and the elevator finger 10
It becomes easier to adjust the movement of. As described above, each time the sheet is folded, the elevator finger 10 accurately descends by the amount of increase in thickness due to the bulk of the base paper to be folded, and the piece of paper can be zigzag folded at the same height position, so the folding shape is always constant. Can be made accurate.

Next, in the period indicated by the symbol C, as shown in FIG.
As indicated by reference numeral 1 (a), the clamp finger 20 is swung to hold down the stacking portion T, and the elevator finger 10 is slightly lowered by the servomotor 80.
As shown in, the trailing portion K and the stacking portion T are separated from each other to form a gap, and the stack of the uppermost paper of the stacking portion T and the lowermost paper of the trailing portion K is released, and the stack T is completely separated. Be done. The topmost sheet of the stacking portion T and the bottommost sheet of the succeeding portion K are fluttering. Then, in the period indicated by the reference sign D, as shown by the reference sign (a) in FIG. 12, the elevator finger 10 is lowered by the servomotor 80 and accurately stopped at the position in front of the turn plate 60 which is instructed in advance. , The air is blown from the rear air blowing nozzle 75 toward the uppermost sheet of the stacking portion T and is sucked from the vacuum hole 60a of the turn plate 60, so that the uppermost sheet of the stacking portion T is placed on the turn plate 60. Adsorbed. The stop position of the elevator finger 10 is an input command variable to the servo motor 80 and can be set to an arbitrary value, so that it can be finely adjusted.

Then, during the period indicated by the symbol F, at the same time that the lowermost paper of the succeeding portion K is folded, the counting finger 30 which has been supporting the succeeding portion K immediately comes out of the succeeding portion K and returns to the original position. Return to. Then, while the elevator finger 10 is descending, the zigzag-folded portion which has been the succeeding portion K until now becomes a new accumulation portion T and is gradually accumulated on the support finger 50. That is, the folding stack T can be steadily stacked on the support fingers 50 instead of the elevator fingers 10 without stopping the apparatus.

Then, in the period indicated by the reference symbol E, as shown in FIG.
As indicated by reference numeral 2 (b), when air is blown from the blowout hole 60b of the turn plate 60, the uppermost paper of the stacking portion T is folded back at the middle portion, and the folded back portion is the vacuum hole of the turn plate 60. It is folded in two on the piece of paper already adsorbed on 60a, and is adsorbed. Then, the turn plate 60 is pivotally supported by the servo motor 81.
It swings around 62 and presses the topmost paper of the stacking portion T from above. On the other hand, the waiting support finger 50 is advanced by the air cylinder 54 and stopped at a predetermined position below the lowermost sheet of the succeeding portion K hanging from which the lowermost sheet of the succeeding portion is moved. Accurately press upwards to fold the bottom sheet of the trailing part in an orderly manner. Then, as indicated by the symbol G, the elevator finger 10
Raises a little and presses the aggregate T from below to make a crease.

As described above, it is possible to correct fluttering paper pieces and reduce defects such as wrinkles and damage and scattering. That is, the uppermost paper of the stacking portion T is always accurately folded by the turn plate 60,
In addition, since the lowermost paper of the succeeding portion K is always accurately folded by the support fingers 50, defective products can be extremely reduced, product loss is reduced, and yield is increased.

Then, in the period indicated by the reference numeral H, FIG.
4. As shown in FIG. 15, the elevator finger 10 descends to the mounting surface, where the protruding pin 20b of the clamp finger 20 moves to the lowest position of the curved slot 22,
The fold end 20a of the clamp finger 20 reversely swivels to open the upper edge of the fold stack T, raises the elevator finger 10 a little to transfer it to the unloading conveyor 70, and tidys the top and bottom paper sheets. The folded stack T having a high probability as a good product that has been wrapped is carried out to the next step such as packing by the carry-out conveyor 70. On the other hand, the turn plate 60 returns to the home position. Then, as shown in FIG. 16, after the folded stack has been carried out to the next process, the elevator finger 10 with nothing placed on the platform is lifted again by the servomotor 80, and the folded stack T on the support finger 50 is lifted. Support. At the same time, the support finger 50, which has been supporting the stack T until now, comes out and returns to the original position.

As described above, the period of the symbols A to H is set as one cycle, and the apparatus of the present embodiment can be repeated one after another without stopping, and the accumulated product T can be carried out to the next step.

[0024]

The elevator finger accurately descends each time a sheet is folded due to the torque of the servo motor generated according to the value of the input command variable, and the paper having different basis weight and crepe ratio, that is, what kind of Even with bulky paper, anyone can easily adjust the torque. Further, the stop position of the elevator finger is an input command variable to the servo motor and can be changed to an arbitrary value according to the requirements of the product, so the stop accuracy is high and fine adjustment is possible. Furthermore, the top sheet of the folding stack is always folded accurately by the turntable driven by the servo motor, and the bottom sheet is always folded accurately by the support table. This will reduce product loss and increase yield. Moreover, since the number of parts of the power transmission system such as the cam and the gear can be reduced, the device can be simplified.

[Brief description of drawings]

FIG. 1 is a front view according to an embodiment of the present invention.

FIG. 2 is a sectional side view according to an embodiment of the present invention.

FIG. 3 is a configuration diagram of an elevator finger.

FIG. 4 is a configuration diagram of a clamp finger.

FIG. 5 is a configuration diagram of a counting finger.

FIG. 6 is a configuration diagram of a support finger.

FIG. 7 is a configuration diagram of a turn plate.

FIG. 8 is a time chart of main members.

FIG. 9 is an explanatory diagram of main components.

FIG. 10 is an explanatory diagram of main components.

FIG. 11 is an explanatory diagram of main parts.

FIG. 12 is an explanatory diagram of main components.

FIG. 13 is an explanatory diagram of main components.

FIG. 14 is an explanatory diagram of main components.

FIG. 15 is an explanatory diagram of main components.

FIG. 16 is an explanatory diagram of main parts.

[Explanation of symbols]

10 Elevator finger 20 Clamp finger 30 Count finger 50 Support finger 54 Air cylinder 60 Turn plate 70 Carry-out conveyor 75 Air blow nozzle 80 Servo motor 81 Servo motor 60a Vacuum hole 60b Air blow hole C1 Cutting part C2 Cutting part F1 Folding bar F2 Folding bar P1 Sheet material P2 Sheet material R1 Folding roll R2 Folding roll T Stacking part K Subsequent part

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshi Kato 1514 Kawanoe-cho, Kawanoe-shi, Ehime Prefecture Kawanoe Machinery Co., Ltd.

Claims (1)

[Claims] 1. A device for automatically and quantitatively taking out a stack of folded stacks which are zigzag-folded in a continuous manner by stacking two sheets, and which are erected so as to face each other in the longitudinal direction of the stack. And a pair of slide posts, an elevator finger on which the folding aggregate is placed upright on a slide bar horizontally installed so as to slide vertically along the slide post, and an elevator on which a fixed amount of folding aggregate is placed. A clamp finger that is combined with an elevator finger to hold the rear upper edge of the folded stack when the finger starts to descend, and a clamp finger that is intermittently driven from the front of the elevator finger to the upper surface of the folded stack and attached to the swing arm. Install the counter finger so that it slides back and forth on the slide block that can slide up and down along the slide post. A support finger that is erected on the beam support bar and that moves forward and backward so as not to interfere with the elevator finger, and a pivot shaft that is installed above the folding aggregate upper surface while the elevator finger is descending. Mounted on the turn plate having a vacuum hole and an air blow hole, an air blow nozzle disposed at the rear of the elevator finger at a height corresponding to the turn plate, and at the same height as the most lowered elevator finger mounting surface. An unloading conveyor provided, a first servo motor for raising and lowering the elevator finger, a second servo motor for swinging the turn plate, and an air which is attached to a proper position of the support finger and moves the support finger forward and backward. Folded stack of sheet material characterized by comprising a cylinder Automatic removal device.