JPH01187132A - Paper supply device in printing machine for corrugated board and the like - Google Patents

Abstract

PURPOSE:To surely feed corrugated boards even if it is thin by arranging a feed guide belt interlocked with a kicker bar on a table between a front gauge and a back guide, and thereby transferring the boards. CONSTITUTION:Corrugated board sheets (a) are stacked and positioned between a front gauge 2 and a back guide 3 on a table 1. An endless guide belt 11 is wound around large and small diameter pulleies 9, 10 under the table 1. A pinion gear 15 meshed with a gear 13 coaxial with the small diameter pulley 10 is interlocked with a crank unit 5, and a reciprocating rack gear 16 engages only when it moves in the direction of (a). A kicker bar 6 having pawl 6a at the tip end reciprocates on the table 1 while being interlocked with a crank shaft 18 of a crank unit 5 the shaft of which follows the rotation of the crank shaft. The lowermost sheet (b) is sucked with a vacuum suction unit 4 below the table 1. It is thus possible to feed corrugated boards sheet by sheet correctly without bending the same even if they are thin.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper feeding device for a printing machine that prints on thick paper such as corrugated cardboard, and more particularly to a device that feeds stacked cardboard or the like one sheet at a time.

BACKGROUND OF THE INVENTION Conventionally, the paper feeding device of this type of printing press is as shown in Fig. 1.
The corrugated sheets a are stacked between the front gauge 2 and the back guide 3 on the table 1, and the lowermost corrugated sheet b is suctioned from the bottom of the table 1 by the vacuum suction device 4, and the hard carver bar 6 is linked to the crank device 5.
The lowermost corrugated cardboard sheet b is transferred one by one to a processing roll made up of a plate WA7 provided in front of the front gauge 2 and a pressurizer 11ii8.

However, in this conventional paper feeding device, the lowest corrugated cardboard sheet b of the stacked corrugated cardboard sheets a is sucked from below and pushed out from behind by the single-sheet hardening bar 6. (approximately 2 am or less), warpage and bending occur when being pushed out by the hard carver 6, which shifts the timing of supply to the printing machine and causes printing errors.
This has the disadvantage that it creates more resistance than necessary and scratches the corrugated cardboard sheet when it gets caught. Furthermore, since the extruded cardboard sheet curves and gets caught on the front gauge 2, sometimes the table 1 and the front gauge 2
During this process, the corrugated cardboard sheets were bent and crushed, resulting in a jam, which caused paper feeding to stop.

Problems to be Solved by the Invention The present invention has been made in order to eliminate the above-mentioned conventional problems, and includes a feed guide belt that is driven in conjunction with the hard cover bar on the table between the front gauge and the back guide. To provide a paper feeding device that can reliably feed one sheet of corrugated cardboard without warping or bending even a thin corrugated cardboard sheet by transporting the corrugated cardboard sheet by the feeding guide belt and the hard cover. , is something to do.

Means to solve problems The present invention on a board will be explained based on FIGS. 2 and 3.

1 is a table, 2 is a front gauge provided in front of the table 1, and 3 is a back guide provided behind the table, which stacks and positions corrugated cardboard sheets a between the front gauge 2 and the back guide 3. It is.

Reference numeral 9.10 denotes a large diameter pulley and a small diameter pulley arranged on the lower surface of the table 1. An endless ring-shaped feed guide belt 11 is wound around both pulleys 9.10. The belt portion 11a is configured to transport the corrugated cardboard sheets a stacked on the table 1 as the feeding guide belt 11 circulates. Reference numeral 12 denotes rollers that hold the upper belt portion 11a of the feed guide belt 11 from below. 13 is a gear fixed coaxially with the small diameter pulley 10; 14 is a transmission gear meshing with the gear 13; 15 is a pinion gear mounted coaxially with the transmission gear 14; the pinion gear 15 is interlocked with the crank device 5. A one-way clutch is configured that meshes with the rack gear 16 moving forward and backward, and rotates (in the direction of arrow C) only when the rack gear 16 moves forward (in the direction of arrow a). The feed guide belt drive mechanism 17 is configured as described above.

In this embodiment, two sets of transmission gears 13 and 14 are connected to the pinion gear 15, and two sets of the feed guide belt 11 are provided.
Although they are arranged in parallel rows, they can be added as appropriate depending on the size of the paper feeding device.

Reference numeral 6 denotes a hard carver having a claw 6a at its tip, and the hard carver 6 moves back and forth on the table 1 in conjunction with a pair of crank devices 19 and 19 (FIG. 3) that follow the rotation of the crankshaft 18 of the crank device 5. It is done like this. In addition, the hard cover 6 moves a distance from the position where it abuts the rear end of the corrugated sheet placed on the table 1 until the corrugated sheet is transferred to a processing roll consisting of a plate cylinder and an impression cylinder of the printing machine. It is the one that has the most movement possible.

This constitutes a hardcover drive mechanism 20.

Further, the hard carver 6 of the hard carver drive mechanism 20,
Feed guide belt 11 of the feed guide belt drive mechanism 17
are designed to be driven in synchronization with each other. That is, the cycle time from the start at point A when the hard carver 6 moves from the rear point A to the front point B to the start at point A of the next cycle, and when the feed guide belt 11 starts rotating and stops. , and the cycle time until the rotational drive starts. In this state, the forward speed (in the direction of arrow a) of the hard cover 6 and the driving speed of the feed guide belt 11 are naturally opposite to each other.

Reference numeral 4 denotes a vacuum suction device disposed on the lower surface of the table 1, which sucks the lowest corrugated cardboard sheet b among the corrugated cardboard sheets a placed on the table 1 toward the table 1 side.

action The operation will be explained using the above configuration.

First, cardboard sheets a are stacked on the table 1. At this time, the hard cover 6 is located at the rear of the corrugated cardboard sheet a. Next, when the paper feeding device is started, the vacuum suction device 4 sucks the lowest cardboard sheet b, and the crank device 5.19 starts driving. As a result, Kitzcarver 6
pushes out the lowest corrugated sheet b from the rear, and the feed guide belt 11 is rotated to push out the corrugated sheet b at the bottom.
The vehicle will be transported forward with the vehicle loaded. and,
When the lowest cardboard sheet b is fed to the printing machine, the hard cover 6 is moved to the rear of the table 1 (starting start position point A).
As the feed guide belt 11 moves to the rack gear 1, the pinion gear 15 constituting the one-way clutch moves to the rack gear 1.
Regardless of the backward movement (in the direction indicated by the arrow) of 6, since it spins idly, it is not driven and is in a stopped state. Further, as the cardboard sheet a moves rearward, the next cardboard sheet C falls onto the table 1 in preparation for paper feeding.

As described above, in the present invention, the corrugated pole is positioned in the front gauge and the back guide in the device that feeds the lowest corrugated sheet among the corrugated sheets stacked on the table to the single-sheet printing machine. A hardcover drive mechanism comprising a hardcover that abuts the edge of a seat and is movable back and forth on a table, a crank device for driving the hardcover, a crank device having the same crankshaft as the crank device, and the crank device. A rack gear that moves forward and backward in conjunction with the rack gear, and a pinion gear that engages with the rack gear and rotates only when the rack gear is driven forward.
and a feed guide belt drive mechanism consisting of a feed guide belt which is rotationally driven by the rotation of the pinion gear, and the hard cover of the hard cover drive mechanism and the feed guide belt of the feed guide belt drive mechanism are respectively synchronized. Since the motor is driven by the motor, the following effects can be obtained.

■Compared to the conventional method of extruding only with a hard carver, since the entire corrugated sheet is moved by being placed on a feed guide belt and extruded by a hard carver, even thin corrugated sheets do not warp or bend, and can be printed. It is possible to provide a paper feeding device that does not cause printing errors because it can reliably feed paper in synchronization with the machine.

■Since there is no warping or bending, clean cardboard sheets without folds or scratches can be fed to the printing machine.

■Since corrugated sheets can be fed without warping or bending, problems such as corrugated sheets bending and crushing between the table and front gauge, resulting in jams and paper feeding stops can be eliminated, and production capacity can be increased. It is possible to create a paper feeding device that increases the paper feed rate, and has excellent practical effects.

[Brief explanation of the drawing]

FIG. 1 is a conventional example, and FIGS. 2 and 3 are a partially sectional side view and a front view showing an embodiment of the present invention. 1: Table 2: Front gauge 3: Back guide 4: Vacuum suction device 5.19: Crank device 6: Hardcover 9: Large diameter pulley 10: Small diameter pulley] 1: Feed guide belt
15: Pinion gear 16 = Rack gear 17: Feed guide belt drive mechanism 20: Hardcover drive mechanism Patent applicant: Marumatsu Seisakusho Co., Ltd.

Claims (1)

[Claims] In a device that feeds the lowest corrugated sheet of corrugated sheets stacked on a table, positioned by the front gauge and back guide, to a single-sheet printing machine, the end of the corrugated sheet comes into contact with the top of the table. A kicker bar drive mechanism consisting of a kicker bar that is movable back and forth, a crank device that drives the kicker bar, a crank device that has the same crankshaft as the crank device, and a rack that moves back and forth in conjunction with the crank device. A feed guide belt drive mechanism consisting of a gear, a pinion gear that meshes with the rack gear and rotates only when the rack gear is driven forward, and a feed guide belt that rotates as the pinion gear rotates. A paper feeding device for a printing machine for printing corrugated board, etc., characterized in that the tight cover of the kicker bar drive mechanism and the feed guide belt of the feed guide belt drive mechanism are driven in synchronization with each other.