JPH0412944A - Sheet send out device - Google Patents

Abstract

PURPOSE:To reduce the torque of a belt turning driving device and vibration at operation by arranging a belt which is arranged to turn freely round in respective suction boxes and provided with suction through holes on the surface and projectingly provided with kick out claws to hook the end part of a sheet. CONSTITUTION:The near end of the lowermost sheet S of piled sheets S between a fixed position ruler plate 4 and a movable ruler plate 41 is hooked with a kick out claw 31 of a belt 3 and turned round. Hereby, the sheet S is kicked out. The belt 3 is arranged in a suction box 22 having opening on the upper face, sucking force is applied on the transport face of the belt 3 to suck the end face of the sheet S, and hence the near end of the sheet S is not disconnected from the kick out claw 31. At every hooking the sheet S end with the kick out claw 31 on the belt 3, the sheet is continuously kicked out one by one.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sheet feeding device that kicks out stacked thick sheets one by one starting from the lowest sheet.

(Prior Art) In the manufacturing process of corrugated cardboard boxes, printing, die-cutting, and marking on corrugated cardboard sheets are performed using a printer slotter.

To supply the corrugated cardboard sheet S to the printer slotter,
A sheet feeding device shown in FIGS. 3 and 4 is used.

The sheet feeding device has a positioning ruler plate (4) disposed at the tip of a base (1), and a movable ruler plate (41) disposed so as to be able to move toward and away from the positioning ruler plate (4) and to position it. Thick sheets S are stacked in between, and the lowest sheets are kicked out one by one toward the downstream side by a kicking device (2) provided on a base (1).

The above-mentioned kick-out device W (2) reciprocates a kick-out plate (14) that is slidably arranged on the base (1) by means of a crank (9), and the kick-out plate (14) serves as a positioning ruler plate. When moving forward to the (4) side, the rear end of the lowest sheet is caught on the hanging part (15) of the kick-out board (14) and kicked out.

The kick-out board (14) and the movable ruler board (41) have positioning devices that position the seat back and forth on the base according to the length of the front and back width of the seat! (7) and (70) are linked.

The longitudinal positioning device (70) of the movable ruler plate (41) has parallel screw shafts (43) (43) pivoted on both sides of the base (1), and a rotary drive device (not shown) attached to the screw shafts. The screw shaft (43) is screwed through the connected leg pieces (42) protruding from both ends of the movable ruler plate (41).

When the screw shaft (43) is rotated in the forward or reverse direction as required, the movable ruler plate (41) can be moved and positioned to any desired position by the screw thrust.

The front-rear positioning device (7) of the kick-out plate (14) utilizes screw thrust in the same way as the front-rear positioning device (70) of the movable ruler plate (41), but the movable ruler plate (
4]) has to reciprocate from the positioning position to kick out the seat, and the entire positioning device has to move from the positioning position to the kicking plate (14
) is a structure that reciprocates with the That is, the screw shaft (
43) A leg piece (16) with a screw shaft (17) disposed inside (43) that can slide parallel to the screw shaft (43) and freely rotate, and protrudes from the kick-out plate (14). The screw shaft (17) is screwed through the screw shaft (17).

A gear (18) is attached to the front of the screw shaft (17).

A spline shaft (95) is provided below the threaded shaft (17), a drive gear (94) is slidably fitted onto the threaded shaft (17), and the drive gear (94) is attached to the threaded shaft (17).
meshes with the gear (18).

A support plate (93) is fitted into the boss of the drive gear (94) so as to be rotatable and movable together with the drive gear (94) in the direction of the spline shaft (95), and the screw shaft is attached to the upper end of the support plate (93). The front end of (17) is supported by the shaft.

A crank (9) for reciprocating the movable ruler plate (41)
is connected to a lever (91) via a link (90), and the free end of the lever (91) and the support plate (93) are pivotally connected by a link (92).

Rotation of the crank (9) causes the link (90), lever (91), link (92), support plate (93), screw shaft (
17) and the leg pieces (16), the kicking board (14) reciprocates on the base (1) and can kick out the sheets S one by one.

When the spline shaft (95) is rotated, the drive gear (94)
) and the gear (18), the screw shaft (17) rotates,
The kicking start position of the kicking plate (14) can be adjusted in accordance with the size of the sheet S by moving the leg piece (16) and thus the movable ruler plate (41) forward or backward.

The amount of sheet kicking out by the kicking board (14) corresponds to the distance from the positioning ruler board (4) to the bowing rollers (81) (81) of the printer slotter (8). When the tray is passed to the rollers (81) (81), the sheet S is sent to the plate cylinder (82) side by the rotation of the pull-in rollers (81) (81) and printed.

Near the point where the kicking speed of the sheet by the kicking plate (I4) is maximum, the sheet is delivered to the pull-in rollers (81) (81), and the pull-in rollers (81) (81)
Pull out the sheet S at a higher speed than the kicking speed in 4),
This prevents the sheet S from being stretched between the pull-in rollers (81) (81) and the kick-out plate (14).

(Problem to be Solved by the Invention) When the kicking board (14) is reciprocated by the crank (9) as described above, the sheet S is moved to the roller when the kicking speed of the kicking board (14) is maximum. Passing the receiver, during one revolution of the crank (9), the number that is effectively working for sheet S feeding is 174.
It is only a rotation, and the efficiency is low. Also, kicker board (14)
The actual stroke of the lever (91) needs to be about twice the distance from the kicking start position until the sheet is bitten by the roller, so the swing width of the lever (91) becomes large, and as mentioned above, the support plate ( 93), drive gear (94) and screw shaft (1
7) must be slid together with the kicker plate (14), the rotating device (not shown) that drives the crank (9) becomes larger, and when the kicker plate (14) reciprocates, vibration increases.

Furthermore, after the movable ruler plate (41) has been positioned in the front-rear direction, it must be held in a fixed state;
4) is a longitudinal positioning device (70) for the movable ruler plate (41) because it moves back and forth from the position determined in the longitudinal direction.
) and the front-rear positioning device (7) for the kick-out board (14) had to be independent from each other, making the configuration complicated.

In view of the above-mentioned circumstances, the present invention provides a sheet feeder that can kick out a sheet with less vibration and with a small torque, and that can simplify the positioning structure of a kicking claw for sheet kicking out and a front-rear positioning device for a movable ruler plate. It reveals the device.

(Means for Solving the Problems) The sheet feeding device of the present invention includes a positioning ruler plate (4) provided at the tip of a base (1), and a positioning unit arranged so as to be able to approach and move away from the positioning ruler plate (4) and to be positionable. Movable ruler board (41)
In the sheet ejecting device, thick sheets S are stacked between the base (1) and the lowermost sheets S are kicked out one by one by the kicking device (2) provided on the base (1). A plurality of guide shafts (11) are arranged in parallel at right angles to the positioning ruler plate (4) above, and a slide member is disposed astride the guide shafts (11) so as to be able to approach and move away from the positioning ruler plate (4). (21) and the slide member (21) slidably between the guide shafts (11).
), which are connected to the suction duct (25) and have a plurality of suction boxes (22) with an open top surface; and each suction box (22) is arranged so as to be rotatable and has a suction through-hole (32) on the surface. A heald (3) with a protruding kick-out claw (31) that catches the edge of the seat when opened, a rotation drive device (5) that drives each belt (3) in rotation, and a slide member (21) are connected to each other. Suction box (22)
and a front-back positioning device (7) for positioning the slide member (21) including the positioning member (21) in the front-back direction with respect to the localization ruler plate (4).

(Operation and Effect) The rear end of the lowest sheet S of the sheets S stacked between the positioning ruler plate (4) and the movable ruler plate (41) is attached to the belt (3).
The kicking claw (31) hooks it and rotates around it.

As a result, the sheet S is kicked out.

The belt (3) is installed in a suction box (22) with an opening on the top surface, and suction force acts on the conveyance surface of the belt (3) to suction the end surface of the sheet S to the belt (3). The end will not come off the kicking claw (31).

Each time the kicking claw (31) on the belt (3) catches the sheet edge, the sheet S is continuously kicked out one by one.

Unlike the conventional crank drive type, there is no need to reciprocate large-scale members, and the torque of the belt rotation drive device (5) is small, making it possible to reduce vibration during operation.

Unlike the conventional kicker board (14), there is no need to reciprocate the kicker board (14) back and forth, so the slide member (21)
A movable ruler plate (41) that slides integrally with the member above.
By providing a movable ruler plate, a longitudinal positioning device dedicated to the movable ruler plate can be omitted, and the configuration can be simplified.

In addition, the orbiting drive device (5) uses an indexing drive (6) that converts the rotation of the motor (63) into intermittent indexing rotation, and the cam curve of the cam built in the indexing drive (6) is Modified sine curve (MS curve;
By using the modified 5ine), kicking starts at a low speed, and when passing the receiving rollers (81) (81), it is possible to achieve the maximum feed speed, which is efficient without damaging the sheet edge. Moreover, the sheet can be kicked out smoothly.

(Example) Figure 1 shows the drawing roller (81) of the printer slotter.
) (81) and the plate cylinder (82) as viewed from the side.

In the following explanation, the front refers to the pull-in roller (gl) (81) side as seen from the sheet S feeding device.

The sheet feeding device has a plurality of guide shafts (11) arranged in parallel in a horizontal plane on a base (1).
A slide member (21) is slidably disposed astride the guide shaft (11) orthogonally to the guide shaft (11).

A movable ruler plate (4) is mounted upward on the front edge of the slide member (21).
1) a movable ruler plate (41) is provided protrudingly.

A positioning ruler plate (4) is placed above the front end of the guide shaft (11) at a distance corresponding to the thickness of one sheet.

A suction box (12) with an open top is provided below the front end of the guide shaft (11) and perpendicular to the guide shaft (11), and a blower (not shown) is connected to the suction box (12).

The suction box (12) sucks the front end of the lowermost sheet S to prevent the front end of the sheet from getting caught on the positioning ruler plate (4).

Each guide shaft (11
) fixing a plurality of suction boxes (22) sliding between them.

Each suction box (22) has an open top, and a long communication box (23) extending in the direction of the slide member (21) at the bottom.
), and a flexible duct (25) is connected to the communication box (23).

In addition, a communication box (23) is provided at the bottom of each suction box (22).
) is slidably provided.

The shutter plate (24) closes the bottom of the suction box (22) that is not related to sheet suction according to the length of the sheet in the direction along the positioning ruler plate (4) to increase suction efficiency. It is.

Two toothed pulleys (33) (34) are pivotally fixed at the front and back inside each suction box (22), and both pulleys (33) (34)
) A wide toothed belt (3) is stretched endlessly across the belt.

Each toothed pulley (34) at the rear is connected to each suction box (22).
) is attached to a common rotating shaft (50) that rotatably passes through the shaft, and one end of the shaft connects to a circular drive device (5) to be described later.
is connected to.

The belt (3) has a large number of suction through-holes (32), and has two kick-out claws (31) that are hooked on the sheet edge and protrude outward at two symmetrical positions.

The phases of the kick-out claws (31) of each belt (3) match, the conveying surface of the belt (3) almost matches the upper surface of the guide shaft (11), and the kick-out claws (31) are aligned with the guide shaft. (11)
Emerges from the top.

The rotation drive device (5) that rotates the belt (3) performs intermittent index rotation using a known indexing drive (6), and includes a suction box (22) at one end.
A spline shaft (53) is rotatably disposed along the transition path of the belt pulley (34), and a drive bevel gear (52) is disposed so as to be slidable on the shaft. The bevel gear (51) meshes with the bevel gear (51).

The drive bevel gear (52) on the side of the spline shaft (53) is attached to a bracket (57) protruding from the side of the suction box (22).
The suction box (22) slides on the spline shaft (53) and moves together with the suction box (22).

Therefore, even if the suction box (22) moves back and forth, the bevel gears (51) and (52) will not come out of mesh, and no matter where the suction box (22) is located, the spline shaft (53)
) can be reliably transmitted to the belt rotation drive rotating shaft (5o).

A timing pulley (55) is attached to one end of the spline shaft (53).
), timing belt (54) and timing pulley (
The output shaft (62) of the indexing drive (6) is connected via the indexing drive (6).
A motor (63) is connected to the input shaft (61) of the input shaft (61).

The cam curve of the cam built into the indexing drive (6) is a modified sine curve (MS curve: Modified 5
ine), and the kicking claw (31) of the belt (3)
) gradually starts kicking out the sheet S, and the retraction roller (
81) The belt (3) is driven around so that the receiver reaches the maximum speed when passing, gradually decreases in speed, stops momentarily, and starts kicking out again.

In the embodiment, the upper kicking claw (31) of the belt (3) shown in FIG. 2 is located above the rear roller (34), and the lower kicking claw (31) is located below the front roller (33). In this state, the belt (3) stops momentarily.

- From the above state, the upper kicking claw (31) kicks out the sheet S, and when it reaches the upper part of the front roller (33) as shown by the two-dot chain line, the sheet S is pulled into the roller (81).
(81) The bridge passes, and the pawl reaches below the lower roller (33) and stops momentarily.

Therefore, one sheet S is kicked out for every 172 of the belt (3).

However, the kicking claw (31) of the belt (3) hooks the rear end of the lowest sheet s of the sheets stacked between the positioning ruler plate (4) and the movable ruler plate (41), causing the sheet to rotate intermittently. do.

As a result, the sheets S are continuously kicked out one by one.

The belt (3) is installed in a suction box (22) with an opening on the top surface, and suction force acts on the conveyance surface of the belt (3) to suction the end surface of the sheet S to the belt (3). The end will not come off from the kick-out claw (31).

Each time the belt (3) rotates intermittently, the sheets S are continuously kicked out one by one.

Unlike the conventional crank drive type, there is no need to reciprocate the parts that cause large losses, and the torque of the intermittent rotation drive device (5) is small, which reduces vibration during operation.

Unlike the conventional kicker board (14), there is no need to reciprocate the kicker board (14) back and forth, so the slide member (21)
A movable ruler plate (41) that slides integrally with the member above.
A longitudinal positioning device (
7), which simplifies the configuration.

Also, orbiting drive device! (5) uses an indexing drive (6) that converts the rotation of the motor (63) into intermittent indexing rotation, and the cam curve of the cam built in the indexing drive (6) is a modified sine curve (MS). curve;
By using the modified 5ine), the kick-off starts at a low speed, and when passing the receiving roller to the retraction roller (81N81), it is possible to achieve the maximum feed speed, making it possible to efficiently and smoothly feed the sheet without damaging the sheet edge. It becomes possible to kick out the seat S.

The present invention is not limited to the configuration of the above embodiment, and various modifications are possible within the scope of the claims. Fig. 3 is a plan view of the conventional example, and Fig. 4 is a sectional view of the conventional example. It is.

(1) Base (11) Guide shaft (2) Kick-out device (21) Slide member (3) Belt (4) Positioning ruler plate (5 )...Intermittent rotation drive device (6)...Indexing drive (7)...Back and forth positioning device

Claims (1)

[Scope of Claims] [1] A positioning ruler plate (4) provided vertically at the tip of the base (1), and a positioning ruler plate (4) disposed in parallel with the positioning ruler plate (4); Thick sheets S are stacked between the movable ruler plate (41), which is arranged so that they can be approached and separated from each other and can be positioned. A sheet feeding device that kicks out sheets one by one includes a plurality of guide shafts (11) arranged in parallel on a base (1) perpendicular to a positioning ruler plate (4), and a guide shaft (11). a slide member (21) disposed astride the positioning ruler plate (4) so as to be able to approach and separate from it; and a slide member (21) disposed between each of the guide shafts (11).
), which are connected to the suction duct (25) and have a plurality of suction boxes (22) with an open top surface; and each suction box (22) is arranged so as to be rotatable and has a suction through-hole (32) on the surface. A belt (3) with a protruding claw (31) that catches the edge of the seat S when opened.
, a rotation drive device (5) that rotates each belt (3), and a suction box (22) connected to the slide member (21).
and a front-rear positioning device (7) for positioning a slide member (21) including a slide member (21) in the front-rear direction with respect to a positioning ruler plate (4). [2] The sheet feeding device according to claim 1, wherein a movable ruler plate (41) is provided on the slide member (21) and integrally with the member (21). [3] The orbiting drive device (5) converts the rotation of the motor (63) into intermittent indexing rotation using the indexing drive (6), and the cam curve of the cam built in the indexing drive (6) is Modified sinusoidal curve (MS curve; M
The sheet feeding device according to claim 1, which is a modified Sine.