JP2002234657A - Accumulation system for sheet printed book - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an accumulation system for a sheet printed book capable of aligning and accumulating printed books precisely. SOLUTION: This accumulation system for the sheet printed book is provided with a supply device 11 for supplying the sheet printed book 20, and an accumulation part 15 for accumulating the supplied sheet printed books 20. A stopper 13 is provided in the accumulation part 15. A control part 17 opens and closes an opening and closing valve 25 based on a signal from a pressure gage 22 to keep a suction pressure within a proper scope and allows the printed book 20 abut on the stopper 13 while reducing speed by a suction vehicle 21 to drop it into the accumulation part 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet printing book stacking system capable of stacking a plurality of printed sheet printing sheets with high precision.

[0002]

2. Description of the Related Art Generally, a printed sheet-fed book is transported by a transport device provided downstream of a sheet-fed printing press, and is sent to a stacking unit, where it is stacked. Sheet-fed books are
When the operating speed of the printing press is increased, the inertia is increased due to the increase in the transport speed.

[0003]

As described above, by increasing the operating speed of the printing press, the inertia of the sheet-fed printing book is increased, and the alignment accuracy is poor due to rebounding or bending of the sheet-fed printing book. In some cases, problems may occur when handling sheet-fed prints in the next process.

[0004] Therefore, there is a demand that sheet-fed printing sheets to be stacked in the stacking section are aligned with high accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a sheet-printing book stacking system capable of stacking sheet-printing books with high precision.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a transport device provided downstream of a sheet-fed printing press for continuously transporting a plurality of printed sheet-fed books, and a sheet transported by the transport device. A stacking unit provided with a stopper for stopping the sheet printing book in contact with the leaf printing book, and a suction unit arranged near the upstream side of the stacking unit and suctioning by contacting the sheet printing book conveyed by the conveyance device. A car, a vacuum pump connected to the suction vehicle via a suction line, an opening communicating with the suction line via an on-off valve, and a control unit for controlling the driving force of the on-off valve to adjust the suction force of the suction vehicle;
And a sheet-fed book stacking system.

According to the present invention, the sheet-fed book transported by the transport device is sucked by the suction wheel and decelerated, then abuts against the stopper, falls to the stacking unit, and is stacked in the stacking unit. The control unit controls the drive of the on-off valve to adjust the suction force of the suction wheel, and keeps the degree of deceleration of the sheet printing by the suction wheel constant.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are views showing an embodiment of a sheet-fed book stacking system according to the present invention.

As shown in FIGS. 1 and 2, a sheet-fed book stacking system is provided downstream of a sheet-fed printing press (not shown), and includes a plurality of printed sheet-fed sheets made of cardboard. A transport device 11 for continuously transporting the book 20;
And a stacking section 15 for stacking a plurality of sheet-fed printing books 20 conveyed by 1.

The conveying device 11 includes a sprocket 11
b, and a claw rod 12 attached to the chain 11a and gripping the sheet-fed book 20. In addition, the stacking unit 15 is brought into contact with the sheet-fed printing book 20 conveyed from the conveyance device 11 to stop the sheet-fed printing book 20,
A stopper 13 that drops to the stacking unit 15 is provided to be freely opened and closed.

As shown in FIG. 1, the sheet printing paper 20 conveyed by the conveying device 11
There is provided a suction wheel 21 which comes into contact with and sucks. This suction wheel 21 has a suction port 21a and rotates in the direction of arrow L. The suction wheel 21 reduces the rotation speed, thereby increasing the relative speed with the sheet printing book 20 to greatly reduce the sheet printing book 20, and increasing the rotation speed to increase the rotation speed of the sheet printing book 20. The relative speed is reduced so that the degree of deceleration with respect to the sheet-fed printing book 20 is reduced.

A vacuum pump 23 is connected to the suction wheel 21 via a suction line 24, and an opening 26 communicates with the suction line 24. The suction line 24 and the opening 26
, An on-off valve 25 is provided. Further, a pressure gauge 22 is attached to the suction line 24, and a pressure signal measured by the pressure gauge 22 is sent to the control section 17 after or simultaneously with a display section 28 for displaying pressure.

The control unit 17 adjusts the opening of the on-off valve 25 based on the signal from the pressure gauge 22. When the on-off valve 25 is opened, air flows into the vacuum line 24 and the suction wheel 21
The suction force of the oil decreases. On the other hand, when the on-off valve 25 is closed, the suction force of the suction wheel 21 increases.

Next, the operation of the embodiment having the above-described configuration will be described.

The sheet printing book 20, which is printed and made of relatively thick paper, is provided on the transport chain 11a, is gripped by the claw rod 12 in the closed state, and is transported to the stacking unit 15. Stacking unit 15
When the sheet is conveyed to a position before the sheet feeding, the claw rod 12 is opened, and the sheet-fed printing book 20 is opened.

In the meantime, the suction wheel 21 is rotated in the direction of arrow L at a small rotational speed by the transport speed of the sheet printing book 20, and the sheet printing book 2 is sucked by the suction port 21a.
0 is decelerated (the book 20 is braked). Also, based on the signal from the pressure gauge 22, the display unit 28 displays the pressure in the vacuum line 24, and the control unit 1
7, the on-off valve 25 is controlled to open and close, and the vacuum line 24
The pressure inside is kept constant.

That is, as shown in FIG. 2, by opening and closing the on-off valve 25 above the maximum pressure and opening the on-off valve 25 below the minimum pressure, the pressure in the vacuum line 24, that is, the suction pressure of the suction wheel 21, Is kept within a suitable range set in advance by the control unit 17.

As described above, according to the present embodiment, the control unit 17 can maintain the suction pressure of the suction wheel 21 within a predetermined appropriate range. The appropriate range in this case is that the sheet-fed printing book 20 contacts the stopper 13 and
When falling into the inside, it refers to a range of suction pressure in which the sheet printing book 20 can be accurately aligned in the stacking unit 15 in consideration of the rebound and deflection of the sheet printing book 20. Thus, the suction wheel 2
By keeping the first suction pressure within an appropriate range, the sheet-fed printing books 20 can be aligned with high accuracy.

As described above, according to the present embodiment, the on-off valve 25 is opened and closed to maintain the suction pressure of the suction wheel 21 in an appropriate range, so that an appropriate braking force is applied to the print book 20. When the abutment 20 is brought into contact with the stopper 13, it is dropped into the collecting section 15 without causing bending or rebound.
The non-defective products 20b can be arranged with high accuracy in the accumulation section 15.

[0021]

As described above, according to the present invention, a sheet-fed book transported by the transport device is sucked by the suction wheel and decelerated, then abuts against the stopper and falls to the stacking section, where it falls within the stacking section. Be accumulated. The control unit drives and controls the on-off valve, adjusts the suction force of the suction wheel, and keeps the degree of deceleration of the sheet-fed printing by the suction wheel constant. For this reason, the sheet-fed printing books falling into the stacking unit can be accurately aligned in the stacking unit.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a sheet-fed book stacking system according to the present invention.

FIG. 2 is a view showing a suction pressure of a suction wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Conveying device 11a Chain 12 Claw rod 13 Stopper 15 Stacking part 17 Control part 20 Sheet printing 21 Suction wheel 21a Suction port 22 Pressure gauge 23 Vacuum pump 24 Vacuum line 25 Open / close valve 26 Opening

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F053 LA06 LB03 LB05 3F054 AA01 AA05 AC04 BA02 BG11 BH07 3F106 AA17 AB02 CA27 CA34 LA06 LB03 LB05

Claims (2)

[Claims] 1. A transport device provided downstream of a sheet-fed printing press for continuously transporting a plurality of printed sheet prints, and a sheet abutting on a sheet-fed book transported by the transport device. A stacking section provided with a stopper for stopping the leaf printing book, a suction wheel disposed near the upstream side of the stacking section and abutting against a sheet printing sheet conveyed by the conveyance device, and a suction line for the suction wheel. A vacuum pump connected to the suction line, an opening communicating with the suction line through an on-off valve, and a control unit for controlling the drive of the on-off valve to adjust the suction force of the suction wheel. An integrated system for single-sheet printing. 2. A system according to claim 1, wherein a pressure gauge is provided in the suction line, and the control unit adjusts the opening of the on-off valve based on a signal from the pressure gauge. .