JPS63282041A - Sheet-fed rotary printing press paper ejection device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper discharge device for a sheet-fed rotary printing press, which is equipped with a plurality of sets of paper discharge stacking devices arranged in parallel in the paper conveyance direction.

[Conventional technology]

In printing work using a sheet-fed rotary printing press, the paper printed by the printing device is transferred from the print cylinder claw to the paper ejection claw of the paper ejection chain, and is conveyed as the paper ejection chain runs. The paper is released from the paper ejection claw that opens by facing the paper release cam, and falls onto the paper stacking table of the paper ejection claw.
loaded.

In this case, if there is only one paper ejection claw, the machine must be stopped and a method known as Itadori must be used to replace the paper stack when the paper stack reaches a predetermined amount. ,
When the machine resumes operation, it takes time to remove the sheets due to abnormalities, resulting in a lot of wasted paper, and the work efficiency decreases.

On the other hand, if the machine is temporarily stopped after fitting or color matching at the start of printing work, or due to a paper feed failure during printing, incorrect paper will be ejected until the uneven ink density stabilizes when the machine resumes operation. Additionally, incorrect paper may be ejected due to oil stains or misregistration during printing.
In this case, conventionally, a marking tape was inserted between the incorrect paper and the correct paper in the paper ejection device, and the incorrect paper was removed after printing was completed, which was also extremely inefficient and required a lot of labor. It was something.

Therefore, the present applicant proposed that
A double pile type paper ejection device disclosed in Japanese Utility Model Publication No. 58-55941 and the like is used. This paper ejecting device has two sets of ejected paper stacking devices (hereinafter referred to as piles) arranged in parallel in the paper conveyance direction by a paper ejecting chain, and a paper release cam is provided for each pile. The paper release cam on the side is switched between active and inactive states to selectively eject paper to either pile. During normal paper ejection, a sensor detects this every time a predetermined amount of paper is loaded on one pile and switches to ejecting the paper to the other pile, or when removing the fraudulent paper. In this system, a paper release cam is activated or deactivated every time a sensor installed in front of a paper ejecting device detects a fraudulent paper, and the fraudulent paper is discharged to a pile for fraudulent papers.

[Problem that the invention seeks to solve]

However, in conventional double-pile paper ejection devices of this kind, the area directly above the pile cannot be closed by the nine paper guides due to the need for the paper to fall, and is completely open, so the downstream side When discharging paper to a pile, when the area outside the end plate of the conveyed paper passes directly above the pile, there is a sag. There was a problem where the conveyed paper got dirty or damaged due to getting caught or rubbed by the paper guide, so if the front guard is lowered, the paper falling to the upstream pile will cross over the front guard and become paper waste. So I couldn't lower it.

[Rounding method to solve problems]

In order to solve these problems, the present invention provides a paper ejecting device equipped with a plurality of sets of ejected paper stacking devices arranged in parallel in the paper transport direction, in which the front part of the ejected paper stacking device on the upstream side of the paper transport is raised up.
It is supported rotatably in the direction of collapse, and a rotating means is provided, and an air blowing device is provided on the front side of the bracket to direct the upstream side of the paper conveyance downwardly of the paper being conveyed.

[Effect]

When discharging paper to the paper stacking device on the upstream side of paper transport, if the front plate is erected and the air blow nozzle is set horizontally, the paper is regulated to the front edge of the front plate and falls due to the negative pressure caused by air blowing. The falling load is facilitated. Since the front cover is highly protruding, the falling paper will not be able to overcome it. In addition, when discharging paper to the discharged paper stacking device on the downstream side in the paper conveyance direction, by laying down the front plate and blowing air near the front plate, the paper being conveyed will be floated by the air and will not sag. The sheet passes through the upstream discharge sheet stacking device, travels without touching the lying forerunner, and is dropped and stacked onto the downstream discharge sheet stacking device.

〔Example〕

1 to 3 show an embodiment of the paper ejecting device according to the present invention, FIG. 1 is a side view of the front area, FIG. 2 is a partially cutaway developed floor plan view, and FIG. FIG. 2 is a schematic side view of the entire device. In the figure, a multicolor sheet-fed printing press 1 includes a paper feeding device (not shown), a plurality of sets of printing units 2 (only one set is shown), and a paper ejecting device 3. Each printing unit) 2 includes:
A plate cylinder 4 on which a printing plate is mounted and a blanket cylinder 5 opposed to the plate cylinder 4 are disposed. And on the printing plate there is an inking device 6
An image is formed using the ink supplied by the ink supplied by the water supply device T and the dampening water supplied by the water supply device T, and this image is transferred to the blanket surface of the blanket cylinder 5.

Further, an impression cylinder 8 with a double diameter is placed in contact with the blanket cylinder 5, and a transfer cylinder 9 with the same diameter is arranged between the impression cylinders 8 of the adjacent printing units 2 with their peripheral surfaces facing each other. It is set up. In particular, with this structure, when the paper fed to the impression cylinder 8 of the printing unit 2 for the first color by the paper feeder passes between the blanket cylinder 5 and the impression cylinder 8, the surface of the paper is coated with rubber. The image on the cylinder 5 is transferred and printed.

A pair of left and right sprockets 11 are coaxially mounted on the paper take-up side 10 facing the impression cylinder 8, and a pair of left and right sprockets 13 are arranged in parallel at the end of the paper ejection frame 12 via a sprocket shaft. A pair of left and right paper ejection chains 14 running in the direction shown by arrow A in the figure is stretched, and between the left and right paper ejection chains 14, a plurality of sets of claws each consisting of a claw shaft 15 and a claw base shaft 16 are arranged. The rod is supported. A gripping claw device 19 (hereinafter referred to as claw 19) consisting of a plurality of claws 1T and a claw base 18 is arranged in parallel on each claw shaft 15 and on the claw base shaft 16, and a cam at the end of the shaft (not shown) is arranged in parallel. The paper 20 is opened and closed by a mechanism, and the paper 20 is gripped from the claws of the impression cylinder 8 and conveyed by the running of the paper discharge chain 14. The iris 20 is a paper guide that guides the paper 20 running on the chain rising portion.

The paper discharge device 3 includes a first pile 21 and a second pile 22.
Two sets of ejected paper stacking devices called . . . are arranged in parallel in the paper conveyance direction. Each pile 21, 22 is equipped with a paper stacking stand 24 which is suspended from four corners by lifting chains 23 from the paper ejection frame 12 side and is raised and lowered by manual operation or automatic control. A paper stack 25 is placed. The paper release cam mechanism shown in the block diagram in FIG. It is configured to open and close this to release the paper 20 and allow it to fall and be stacked onto the paper stacking board 25. Then, when the paper release cam mechanism 26 of the first pile 21 opens and closes in response to a command from the control device, the paper 20 is stacked on the paper stacking plate 25 of the first pile 21, and
The paper release cam mechanism 26 of the pile 21 is inactive and the second
When the paper release cam 2T of the pile 22 is activated, the paper 20 passes through the first pile 21 and is dropped and stacked onto the paper stacking board 25 of the second pile 22.

Reference numeral 28 denotes a paper guide supported by an angle 29 between both piles 21.
It is held between 22 meters so that it does not sag. Also, 30
is a suction wheel provided at the starting end of each pile 21, 22, which rotates while suctioning air from the pile, brings the conveyed paper 22 into sliding contact and suctions it, and brakes the tail of the paper. The paper is released under tension.

Further, each pile 21, 22 is provided with a front guard 31 that is released from the grip of the mori and claws 19 and falls. The front cover 31 of the pile 21 is erected by the mechanism explained below.
It is configured to lie down. In other words, the wax and sub-frames 32 are stamped inside the left and right paper ejection frames 12).
A plurality of front supports 31 are fixed in parallel on a front support shaft 34 which is rotatably mounted between the left and right sub-frames 32 and is supported through a front support shaft 33t. An air cylinder 36 as a front rotation means is pivotally supported on a stud 35 installed inside the paper discharge frame 12, and a piston rod 3T that moves back and forth with air pressure has one end at its working end. The other end of a lever 38 fixed to the front abutment shaft 34 is pivotally attached.

By doing this, when the piston rod 3T moves forward, the front stop 31 stands up as shown by the solid line in FIG. 1, and when the piston rod 3T moves back from this state, the front stop 31 stands up as shown by the chain line Lay down as shown. The timing of this rising and falling is controlled so that the paper stands up while the paper is being delivered to the first pile 21 side, and falls down when the paper is being delivered to the second pile 22. Note that each front stop 31 is engaged with a groove of the paper guide 28 so that it can be folded down.

Further, diagonally above the front abutment shaft 34, an air pipe 39 is supported between the left and right subframes 32, and the air pipe 39 is connected to an air source (not shown) by a hose or the like. They are connected by a four-bar link 43 consisting of links 40, 41, and 42, and are configured so that the air pipe 39 also rotates reciprocally in conjunction with the reciprocating rotation of the front shaft 34. A plurality of nozzles 4 are emitted from the air pipe 39.
Nozzles 4 are arranged in parallel in the axial direction and protrude, and when the front stopper 31 is raised, the nozzle 43 is laid down in a horizontal state. Furthermore, when the front stop 31 is laid down, the air is directed toward the tip of the front stop 31 and is blown onto the paper 20 passing near the front stop.

The operation of the paper ejecting device configured as above will be explained. When the piston rod 3T is advanced by the air pressure of the air cylinder 36, the front stop 31 stands upright and the nozzle 31 becomes horizontal, so the paper release cam mechanism 26 on the first pile 21 side is activated and the printing operation is started. Start. As a result, the nail 1S
The paper 20 being conveyed in the grip is released from the grip when the claw 19 opens opposite the paper release mechanism 26, and the tail of the paper is pulled under tension by the suction wheel 30. Afterwards, it is dropped and stacked onto the paper stacking board 25. In this case, the front weight 31 is upright and sufficiently high, so the paper 20 is
- The sheets are stacked while being squeezed by coming into contact with the front stopper 31 and aligning the edges of the sheets without crossing over. Further, at this time, air is blown upward from the stacked paper 20 from the nozzle 44, and negative pressure is generated at this location, so that the falling of the paper 20 is promoted.

When a predetermined amount of paper 21 is loaded on the first pile 21, the first
The paper release cam 26 of the pile 21 is inactive), and the second
The paper release cam 27 of the pile 22 is activated. The piston rod 3T of the air cylinder 36 moves back and the front abutment 3
1 falls down to the chain line position, and the nozzle 44 rotates to the chain line position and is directed toward the tip of the front stopper 31. In this state, the paper 20 held by the claw 19 and conveyed passes through the first pile 21 and reaches the second pile 22, and the paper release cam 27 opens the claw 19 and the paper 20 is transferred to the second pile 22. The paper is dropped and stacked onto the paper stacking board 25. In this case, the paper 20 passing above the first pile 21 has the front cover 31 laid down and the nozzle 4
The paper floats up due to the air blowing up from the paper guide 2, passes over the first pile 21 without touching the front plate 31, and the paper guide 2
You will be guided at 8.

Note that the nozzle 44 does not necessarily need to be rotated, and a sufficient effect can be obtained even if the nozzle 44 is fixed and directed downward from the conveyed paper 20. Further, the rotation means is not limited to an air cylinder, but may be a hydraulic seven cylinder or a cam mechanism. Furthermore, the present invention can be implemented in a similar manner to a device provided with a second pile for discharging fraudulent paper.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a sheet-fed rotary printing press equipped with a plurality of sets of discharged paper stacking devices arranged in parallel in the paper transport direction, The front part of the loading device is supported so as to be rotatable in the upright and fall directions, and a rotating means is provided thereon, and an air blowing device is provided on the front part side, which directs the upstream side of the paper conveyance downwardly from the paper being conveyed. By providing this, when the paper is discharged to the upstream paper stacking device, the front plate stands up and has sufficient height, so the falling paper does not go over the front plate, which prevents the occurrence of paper waste. In addition to reducing the amount of paper, it also improves paper alignment and increases the speed of the machine. Also, when discharging paper to the downstream loading device, the front cover is lying down and the conveyed paper is lifted by the air from the nozzle.
This allows the conveyed paper to be conveyed without touching the forerunner.
Paper is not soiled or damaged, reducing the amount of paper waste. Furthermore, when discharging paper to any loading device, it is no longer necessary to adjust the paper release timing each time the paper thickness, paper quality, paper size, etc. is changed, reducing changeover time and the mental burden on workers. be able to.

[Brief explanation of the drawing]

1 to 3 show an embodiment of a sheet discharge device for a sheet-fed rotary printing press according to the present invention, FIG. 1 is a side view of the front area, FIG. 2 is a partially cutaway developed plan view, FIG. 3 is a schematic side view of the entire paper discharge device. 1...Printing machine, 3...Paper discharge device, 14-...
Paper ejection chain, 19--claw, 20...L21
...--First pile, 22...Φ・Second pile, 25
...-Paper stack, 26.27 fist...Paper release cam mechanism,
28・φ fist・Paper guide, 31--@・Maetou, 34@・・
・Front axis, 3611...Fist air cylinder, 37...
Piston rod, 43...Φ fist 4-section link, 4411...
9. Nozzle O

Claims (1)

[Claims] A paper ejection chain that has a paper ejection claw that grips the edge of the paper and transports the paper held by the paper ejection claw by running, multiple sets of ejected paper stacking devices that are arranged in parallel in the paper ejection transport direction of this paper ejection chain, and each of these paper ejection chains. A cam mechanism disposed above the paper stacking device for opening and closing the paper ejecting claw, in the paper discharging device of a sheet-fed rotary printing press that selectively ejects the conveyed paper to each of the ejected paper stacking devices. A plurality of front stops attached to an upstream discharged paper stacking device for regulating the front end of falling stacked papers are supported rotatably in the rising and falling directions, and a rotating means is provided therefor, and a rotating means is provided therefor, and a rotating means is provided therefor, and a rotating means is provided for supporting a plurality of front stops attached to an upstream discharge paper stacking device to regulate the front end of falling stacked paper, and providing rotation means therefor. A sheet discharge device for a sheet-fed rotary printing press, characterized in that an air blowing device is provided that directs air downward from the upstream side of paper conveyance.