JP2503118Y2 - Paper ejection device for sheet-fed printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a sheet-fed printing machine that inserts a slip sheet between main sheets to prevent set-off and discharges the sheets.

<Prior Art> In the sheet-fed printing press, the printing paper conveyed by the delivery device using the chain after printing is finally dropped on the paper stacking table,
Loaded. In this case, for example, in the case of intaglio printing or the like in which the thickness of the ink on the printing surface is thick, the ink is difficult to dry, and if it is stacked as it is, it will set off. Therefore, there has been conventionally used a method of inserting a slip sheet between the main sheets when the sheets are discharged onto the sheet stacking table.

On the other hand, in order to stably lower the printing paper released from the gripper of the delivery device's delivery chain onto the paper stack, an air nozzle is arranged above the paper stack along the transport direction of the printing paper by the delivery machine. Air is blown from this nozzle toward the top of the paper stack from above the printing paper.

<Problems to be solved by the device> However, when air is blown from the nozzle to drop the main sheet and the interleaf sheet on the paper stack, there is an air layer between the main sheet and the interleaf sheet. There has been a problem that relative slippage occurs between the sheets and the alignment of the two sheets is not good.

The present invention solves the above-mentioned problems of the conventional paper discharge device, and removes the air layer between the main paper and the interleaf to prevent the misalignment of the main paper and the interleaf. The purpose is to provide a paper device.

<Means for Solving the Problems> In order to achieve the above-mentioned object, in the sheet discharging device of the sheet-fed printing press according to the present invention, a delivery device that conveys the main sheet and the interleaf sheet in an overlapping manner, and the main sheet and the interleaf sheet are provided. In a sheet discharge device of a sheet-fed printing press having a paper stacking platform that is dropped while being decelerated by a suction wheel and stacked, a main paper and a slip sheet are released from a chain gripper on the upstream side in the transport direction from the suction wheel. An air blowing device capable of blowing air from above the transport path for the main paper and the interleaf paper along a direction transverse to the transport direction is provided at a position where the trailing edge of the paper passes below.

<Operation> The main sheet and the interleaf sheet that are stacked and conveyed are blown with air by the air blowing device in a direction transverse to the conveyance direction, and the blowing position is between the main sheet and the main sheet as the conveyance movement of the main sheet and the interleaf sheet occurs. The paper is gradually moved from the front end side to the rear end side in the conveying direction. In the process, the air present between the main paper and the interleaf is squeezed and discharged to the rear end side, and the air layer between the main paper and the interleaf is removed.

<Embodiment> An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 4 is a schematic configuration diagram of an intaglio printing press which is an example of an application target of the present invention. In FIG. 4, 11 is a feeder and 12 is a feeder.
Is a paper transfer cylinder, 13 is an impression cylinder, 14 is a plate cylinder, 15 is an inking roller, 16 is an inker, 17 is wiping, 18 is an air jet, 19 is a delivery device, 20 is a slip sheet feeder, and 21 is the first A paper stacker, 22 is a second paper stacker, 23 is a prime mover, and 24 is a wiping prime mover.

The actual paper (printing paper) is printed between the impression cylinder 13 and the plate cylinder 14, and passes between the air jets 18 while being dried by the delivery device 19. On the other hand, as shown by the broken line arrow, the interleaf paper is supplied from the interleaf paper feeder 20 in synchronism with the transport of the real paper, and is gripped by being overlapped with the real paper at the left end corner of the delivery device 19, and the paper stacking table 21. , 22 Moved up. Above the both paper stacks 21 and 22, nozzle placement parts 25,
26 is provided, and the main paper and the slip sheet released from the chain gripper of the delivery device 19 are dropped onto the paper stacking plates 21 and 22 and discharged. Here, the first paper loading platform 21 and the second paper loading platform 22 are
One of the paper trays is used, and when it is full, the other paper tray is used.

FIG. 1 is a plan view of a main part of a paper discharge device according to an embodiment of the present invention, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. 3 is a side view of the main part. In addition, in the above-mentioned printing machine, two paper stacks 2
Although 1, 22 and its nozzle configuration are provided, they have the same configuration, so only one will be described below.

In FIG. 3, the paper stacking table 22 is moved up and down by the lifting devices 27 on both sides, and the upper surface of the printing paper 28 loaded on the paper loading table 22 has a constant height. On this paper stacking table 22, there is provided a paper holder 29, which is brought into contact with the leading ends of the printing papers 28 that have been conveyed and dropped (the actual printing paper and the interleaf paper are in an overlapping state). A suction wheel 30 for decelerating the main sheet and the slip sheet released from the chain gripper of the delivery device 19 is mounted on a frame (not shown) above the paper stack 22 and connected to a vacuum source (not shown). Has been done. The suction wheel 30 can be moved so as to be located above the paper tail portion according to the paper size.

Further, above the paper stacking table 22 and the suction wheel 30, there is provided a transport path 31 by the chain of the delivery device 19, and the main paper and the interleaf sheet are overlapped along this transport path 31 from left to right in FIG. Be transported. In FIG. 3, 32 is the delivery device 19
Is a chain sprocket.

Further, the above-mentioned nozzle arrangement portion 26 is provided above the paper stacking table 22 and the transport path 31, and air is blown downward by a plurality of air nozzles. Here, these nozzles include one for stably lowering the main paper and the interleaf released from the chain gripper of the delivery device 19, and one for configuring the air blowing device according to the present invention.

First, the former will be described. As shown in FIGS. 1 and 3, stays 35 and 36 are suspended and fixed to frames 33 and 34 arranged on both sides in parallel with the transport path 31. On the other hand, a holding plate 38 is fixed to the stay 35 via a column 37, and a holding plate 39 is also fixed to the other stay 36,
The four pipes 40 are hung on both holding plates 38 and 39 and the four conveying pipes 31
It is mounted parallel to the transport direction of. One end of each pipe 40 is connected to an air hose 41, and compressed air is supplied from a supply source (not shown). This air hose
41 is mounted on a bracket 42 fixed to a holding plate 38. Also, each pipe 40 has seven air nozzles.
43 are attached, and each air nozzle 43 communicates with the inside of the pipe 40 and blows compressed air downward.

On the other hand, the latter air blowing device 44 of the present invention is located along the direction transverse to the transport direction. That is, as shown in FIG. 1 and FIG. 2, holding plates 47, 48 are fixed to the frames 33, 34 on both sides via columns 45, 46, respectively, and are hung on these holding plates 47, 48 to pipe. 49 is mounted so as to cross the transport direction at a right angle. An air hose 50 is also connected to one end of the pipe 49, compressed air is supplied from a supply source (not shown), and five air nozzles are connected to the pipe 49.
51 is attached, and compressed air is blown downward from there.

The air blowing device 44 including the pipe 49, the air nozzle 51, and the like is located upstream of the air nozzle 43 and the suction wheel 30 in the transport direction, and before the main paper and the slip sheet are released by the chain gripper of the delivery device 19. First, it is desirable that the trailing edge of the paper passes below the air blowing device 44.

According to such a configuration, the main sheet and the interleaf sheet, which are stacked and conveyed by the delivery device 19, are conveyed by the air blowing device 44.
Air is blown from the air nozzle 51 along a direction transverse to the conveyance direction, and the blowing position gradually moves from the front end side to the rear end side in the conveyance direction of the main sheet and the interleaf sheet as the main sheet and the interleaf sheet are conveyed and moved. Then, in the process, the air interposed between the main paper and the interleaf is squeezed and discharged to the rear end side, and the air layer between the main paper and the interleaf is removed.

Subsequently, the main paper and the slip-sheet are released from the chain gripper of the delivery device 19 above the paper stack 22 and are decelerated by the suction wheel 30 while being stably dropped onto the paper stack 22 by the air shower from the air nozzle 43. To do. Here, since there is no air layer between the main sheet and the slip sheet, the main sheet and the slip sheet do not slip relative to each other when they are dropped, and the alignment of both sheets becomes good.

In the above-described embodiment, the air blowing device 44 is composed of a plurality of air nozzles 51 arranged in parallel, but in addition to this, for example, a slit may be formed in the pipe 49 in a direction transverse to the conveying direction to blow out air. Good. Further, in the above-mentioned embodiment, the air blowing device 44 is provided in a direction transverse to the conveying direction at a right angle, but it may be provided so as to traverse diagonally.

<Effect of the Invention> As described above in detail with reference to the embodiment, according to the present invention, the air blowing device is provided above the conveyance path of the main sheet and the interleaf sheet along the direction transverse to the conveyance direction. Therefore, when the main paper and the slip sheet pass therethrough, the air layer between the main paper and the slip sheet is removed, and good paper alignment on the paper stacking base can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a paper discharge device according to an embodiment of the present invention, FIG. 2 is a view taken along the line II-II of FIG. 1, FIG. 3 is a side view of the main part, and FIG. 1 is a schematic configuration diagram of an intaglio printing press which is an example of an application target of the present invention. In the drawing, 19 is a delivery device, 21 and 22 are paper loading platforms, 30 is a suction wheel, 31 is a transport path, 44 is an air blowing device, 49 is a pipe, 50 is an air hose, and 51 is an air nozzle.

Claims (1)

(57) [Scope of utility model registration request] 1. A sheet discharging device of a sheet-fed printing press having a delivery device for conveying a main sheet and a slip sheet in an overlapping manner, and a paper stack on which the main sheet and the slip sheet are dropped and stacked while being decelerated by a suction wheel. At a position upstream of the suction wheel in the transport direction and at a position where the trailing edge of the paper passes below before the main paper and the slip sheet are released from the chain gripper along the direction transverse to the transport direction. A sheet discharging device for a sheet-fed printing press, comprising an air blowing device capable of blowing air from above a conveyance path for a main sheet and a slip sheet.