JPH0639848U - Paper ejection device for sheet-fed printing press - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents the occurrence of scratches and rubbing caused by the paper when it passes through the discharge stacking device. [Structure] A paper guide 21 that is movable between a guide position that covers the upper surface of the first pile 7 and a retracted position that opens the upper surface is provided on the paper pad 9 side, and the paper guide 21 is advanced to the guide position to move the paper 6 Covers the upper surface of the first pile 7 through which the paper passes and the paper 6 is guided by the paper guide 21 to eliminate the fluttering and fluttering of the rear end of the paper 6 and prevent the paper 6 from being scratched or rubbed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper discharge device that alternately discharges paper that has been conveyed after printing in a sheet-fed printing press to a plurality of paper discharge stacking devices arranged in parallel in the conveying direction.

[0002]

[Prior art]

 In the sheet-fed printing press, the paper printed by the printing device is moved from the claw of the printing cylinder to the discharge claw of the discharge chain, and is conveyed as the discharge chain runs. After that, the paper is released from the paper ejection claws on the paper stacking table and is dropped and stacked on the paper stacking table.

A conventional paper discharge device will be described with reference to FIG. FIG. 5 shows a schematic structure of a conventional paper discharge device.

A discharge cylinder 3 is provided opposite to the impression cylinder 2 on the printing apparatus 1 side, and a discharge chain 4 is wound around the discharge cylinder 3. A large number of paper ejecting claws 5 are provided on the paper ejecting chain 4, and the printed paper 6 is carried by the paper ejecting cylinder 3 to the paper ejecting claws 5 and conveyed as the paper ejecting chain 4 travels.

Two sets of paper discharge stacking devices 7 and 8 (first pile 7 and second pile 8) are arranged in parallel in the conveying direction of the paper 6. The paper 6 is released from the paper ejection pawl 5 on the first pile 7 or the second pile 8 and drops onto the first pile 7 or the second pile 8 to be stacked.

A paper pad 9 is provided on the front side of the first pile 7 and the second pile 8 in the carrying direction, and the leading end of the paper 6 released from the paper ejection pawl 5 contacts the paper pad 9 and is positioned in the carrying direction. Stop. Further, a suction wheel 10 is provided movably in the transport direction on the rear side of the first pile 7 and the second pile 8 in the transport direction, and the rear end of the paper 6 released from the paper discharge claw 5 is moved to the suction wheel 10. Sucked. When the rear end of the paper 6 is sucked by the suction wheel 10, the paper 6 is decelerated and the impact on the paper pad 9 is relieved. The suction wheel 10 is automatically positioned according to the size of the paper 6.

In the above-described paper discharge device, the paper 6 is first stacked on the first pile 7, and when the stacking amount reaches a predetermined amount, the paper 6 is discharged to the second pile 8. While the paper 6 is discharged to the second pile 8, the paper 6 stacked on the first pile 7 is taken out of the machine and prepared for the next paper discharge. When the stacking amount of the paper 6 on the second pile 8 reaches a predetermined amount, the paper 6 is discharged to the first pile again and the paper 6 stacked on the second pile 8 is taken out of the machine. By repeating this process and discharging the sheets alternately by the first pile 7 and the second pile 8, continuous operation becomes possible without stopping the machine. As a result, productivity can be improved.

In addition, by providing the first pile 7 and the second pile 8, a defective paper detection device (not shown) detects a defective paper, and discharges only the defective paper to the second pile 8, a print inspection, or the like. Thus, it is possible to take out only the arbitrary paper 6 to be inspected into the second pile 8.

[0009]

[Problems to be solved by the device]

 In the paper discharge device described above, when the paper 6 is discharged to the second pile 8, the paper 6 held by the paper discharge nail 5 passes over the first pile 7, but the rear end of the paper 6 is If it is free, there will be flapping and stinging. At that time, the paper 6 being conveyed may come into contact with the first pile 7 to be scratched or rubbed, and the ink of the printing paper stacked on the first pile 7 may be attached, which may cause a print quality problem. was there. Further, the paper 6 stacked on the first pile 7 may be scratched or rubbed, and the paper alignment may be broken.

[0010]

[Means for Solving the Problems]

 The configuration of the present invention for solving the above-mentioned problems includes a conveying means that holds and runs a paper edge, a plurality of discharge stacking devices arranged in parallel in the paper conveying direction, and a rear side in the paper conveying direction. In the sheet ejection device of the sheet-fed printing press equipped with the paper catch provided on the upper part of the paper ejection stacker, the paper ejected on the paper catch side of the paper ejection stacker other than the rearmost side in the paper transport direction. A paper guide member is provided that is movable between a guide position that covers at least the rear side of the upper surface of the stacking device in the transport direction and a retracted position that opens the upper surface.

[0011]

[Action]

 When the paper transported by the transport means passes over the paper output stacking device, the paper guide advances to the upper surface, and the trailing edge of the paper is guided by the paper guide, and the paper touches the paper output stacking device. There is no.

[0012]

【Example】

 FIG. 1 shows the entire structure of a sheet discharging device of a sheet-fed printing press according to an embodiment of the present invention. The same members as those shown in FIG. 5 are designated by the same reference numerals, and duplicate description will be omitted.

A paper guide member (paper guide) 21 is provided on the paper stack 9 side of the first pile 7, and the paper guide 21 covers the upper surface of the first pile 7 from the rear side in the transport direction.

The paper guide 21 will be described with reference to FIGS. 2 to 4. 2 shows the plane of the paper guide 21, FIG. 3 shows the III-III line arrow in FIG. 2, and FIG. 4 shows the side of the paper guide 21.

In the figure, 22 is a paper contact shaft, and the paper contact shaft 22 is rotatably supported by a frame 23 on the front side of the first pile 7 (second pile 8) orthogonal to the transport direction. . A plurality of paper catches 9 (five in the illustrated example) are attached to the paper catch shaft 22, and five paper catches 9 stand at the same time when the paper catch shaft 22 rotates.

Guides 24 extending along the transport direction are attached to the frame 23 on the paper contact shaft 22 side of the first pile 7 (the sheet stacking device other than the rearmost side in the transport direction of the paper 6). Both ends of a base 26 extending parallel to the paper contact shaft 22 are supported by 24 via bearings 25. A plurality of (nine in the illustrated example) support plates 27 are erected on the base 26, and a paper receiver 28 is attached to each support plate 27. It extends to the front side. The length of the paper receiver 28 is substantially equal to the size of the smallest paper 6, and a large number of rollers 29 are attached to the paper receiver 28. By moving the base 26 along the guide 24, the paper receiver 28 is movable between a guide position that covers the upper surface of the first pile 7 on the rear side in the transport direction and a retracted position that opens the upper surface. Has become.

Both ends of a fixed base 30 extending parallel to the base 26 are attached to each frame 23 at the rear end in the transport direction. The fixed base 30 has elongated holes 31 and 32 formed at symmetrical positions near the center of the center P, and the base 26 has elongated holes 33 and 34 formed at symmetrical positions near the frame 23 of the center P. ing. Both ends of the levers 37, 38 are supported by the long holes 31, 34 and the long holes 32, 33 on opposite sides of the center P via cam followers 35, 36, and the levers 37, 38 intersect at the central position. It has become. The movement of the base 26 causes the cam followers 35 and 36 to move within the long holes 31 and 34 and the long holes 32 and 33.

The air cylinder 39 is fixed at the position of the center P, and the drive rod 40 of the air cylinder 39 is reciprocally driven in the transport direction of the paper 6. The intersections 41 of the levers 37 and 38 are rotatably connected to each other, and the intersections 41 are rotatably supported by the drive rod 40. That is, as the drive rod 40 expands and contracts due to the driving of the air cylinder 39, the intersecting portion 41 moves in the transport direction, and both ends of the levers 37 and 38 are provided with the long holes 31, 33 and the long holes via the cam followers 35, 36. The base 26 moves reciprocally in the carrying direction by moving inside the parts 32 and 34.

In the paper discharge device described above, the paper 6 is first stacked on the first pile 7, and when the stacking amount reaches a predetermined amount, the paper 6 is discharged to the second pile 8. While the paper 6 is discharged to the second pile 8, the paper 6 stacked on the first pile 7 is taken out of the machine and prepared for the next paper discharge. When the stacking amount of the paper 6 on the second pile 8 reaches a predetermined amount, the paper 6 is discharged to the first pile 7 again, and the paper 6 stacked on the second pile 8 is taken out of the machine. By repeating this, the first pile 7 and the second pile 8 alternately discharge the paper.

While the paper 6 is being stacked on the first pile 7, the air cylinder 39 is driven to move the base 26 to the front side in the transport direction, and the paper receiver 28 is retracted from the upper surface of the first pile 7. The upper surface of the 1-pile 7 is opened (state shown by a chain line in the figure). At this time, the paper stopper 9 is in a standing state, and the suction wheel 10 advances to suck the rear end of the paper 6.

When the stacking amount of the first pile 7 reaches a predetermined amount, the switching signal causes the paper catch 9 on the first pile 7 side to fall and the paper catch 9 on the second pile 8 side to stand up. At the same time, the air cylinder 39 is driven to move the base 26 to the rear side in the transport direction, and the paper receiver 28 covers the upper surface of the first pile 7 (state shown by a solid line in the figure). The paper 6 passes through the first pile 7 and is discharged to the second pile 8. When the paper 6 passes over the first pile 7, the trailing end of the paper 6 is guided by the paper receiver 28 and the roller 29, so that the paper 6 is fluttered or flaps. Will not occur.

The length of the paper receiver 28 is set according to the size of the minimum paper, and when the minimum paper 6 is discharged, the paper receiver 28 covers the entire surface of the first pile 7. . Further, when the largest paper 6 is discharged, as shown in FIG. 1, it is in a state of covering approximately half of the rear side of the first pile 7 in the transport direction.

When the largest paper 6 is discharged to the second pile 8, the suction wheels 10 of the first pile 7 and the second pile 8 are moved to the front side in the transport direction to suck the rear end of the paper 6. At this time, there is a portion where the rear end of the paper 6 becomes free between the suction wheel 10 of the first pile 7 and the tip of the paper receiver 28, but the rear end of the paper 6 is stable immediately after leaving the suction wheel 10. Will be transported. Therefore, when the trailing edge of the paper 6 is fluttered or fluttered, the paper is guided by the paper receiver 28, and even if the length of the paper receiver 28 is set to the size of the minimum paper, the suction wheel 10 is not moved. By using them together, it is possible to guide the largest paper 6.

In the above-described paper discharge device, when the paper 6 passes through the first pile 7, the trailing edge of the paper 6 is guided by the paper receiver 28, so that no flapping or fluttering occurs. For this reason, the rear end of the paper 6 does not come into contact with the first pile 7, and the paper 6 is not scratched, rubbed, adhered with ink, or the like, and the papers stacked on the first pile 7 are aligned. It doesn't crumble. Further, since the paper receiver 28 is moved from the paper holder 9 side to cover the first pile 7, the length of the paper receiver 28 can be shortened and the paper receiving member can be downsized. .

Further, since the base 26 is moved by the two levers 37 and 38 to move the paper receiver 28 back and forth, the stroke of the air cylinder 39 can be shortened. Therefore, the paper receiving member 21 can be downsized and speeded up, and a high speed printing machine can be supported.

In the above embodiment, the sheet discharge device having two sets of sheet discharge stacking devices (pile) has been described as an example. However, the present invention is applicable to a sheet discharge device having three or more sets of piles. Is also possible. Although the base 26 is driven by using the air cylinder 39, the base 26 may be driven by using a motor and a feed screw.

[0027]

[Effect of device]

 Since the paper discharge device of the sheet-fed printing press of the present invention is provided with the paper guide member movable between the guide position for covering the upper surface of the paper discharge stacking device and the retracted position for opening the upper surface, By advancing the paper guide member to the guide position, the upper surface of the paper discharge stacking device through which the paper passes is covered, and the paper passing through is guided by the paper guide member, so that the trailing edge of the paper does not have fluttering or fluttering. . As a result, the trailing edge of the paper does not come into contact with the paper discharge stacking device, and the transported paper and the stacked paper are not scratched or rubbed, and the deterioration of product quality can be prevented. Further, since the paper guide member can be moved back and forth from the paper contact side, the paper guide member can be downsized and the forward / backward stroke can be shortened.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a sheet discharge device of a sheet-fed printing press according to an embodiment of the present invention.

FIG. 2 is a plan view of a paper guide.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a side view of the paper guide.

FIG. 5 is an overall configuration diagram of a paper discharge device of a conventional sheet-fed printing press.

[Explanation of symbols]

 6 Paper 7 1st pile 8 2nd pile 9 Paper hit 21 Paper guide member (paper guide) 23 Frame 24 Guide 26 Base 28 Paper receiver 30 Fixed base 31, 32, 33, 34 Long hole 37, 38 Lever 39 Air cylinder 40 Drive rod

Claims (1)

[Scope of utility model registration request] 1. A transporting means for holding and running a paper edge, a plurality of sets of paper discharge stacking devices arranged in parallel in the paper transporting direction, and a top part of the paper discharge stacking device on the rear side in the paper transporting direction. In a sheet discharging device of a sheet-fed printing press including a sheet stopper, at least the rear side of the upper surface of the sheet discharging and stacking device provided on the sheet catching side of the sheet discharging and stacking device other than the rearmost side in the sheet conveying direction. A sheet ejection device for a sheet-fed printing press, comprising a paper guide member that is movable between a cover position for covering and a retracted position for opening the upper surface.