JPH0540248U - Sheet-fed printing machine Paper ejection device - Google Patents

Abstract

(57) [Summary] [Purpose] The printing surface of the printing paper does not come into contact with a part of the paper ejection unit in the paper ejection path to cause rubbing or stains.
Eliminates the need for adjustment work to adapt to the dimensions of the printing paper and the printing contents. [Structure] Installed between two sprockets 15 and 16,
The chain gripper 17 is provided with the paper claws 17a arranged at regular intervals.
Hold. A paper guide 51 is arranged so as to face the printed paper conveyance orbital surface of the chain gripper 17, and a paper discharge path 21 is formed between them. The surface of the paper guide 51 is formed of a porous layer 53, and air is jetted from the surface toward the surface of the chain gripper 17 for conveying the printing paper. The paper guide 51 includes a paper guide body having an opening on the side of the chain gripper 17 that faces the printing paper conveyance path surface, and a sintering process that covers the opening of the paper guide body and forms a space in the paper guide body. It has a porous layer 53 composed of a body and means for supplying air into the space.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet-fed printing press ejecting device.

[0002]

[Prior Art]

 Conventionally, in a sheet-fed printing press, printing paper that has been printed and discharged from a printing unit is conveyed to a paper stacking device via a paper discharge unit, and is sequentially stacked in the paper stacking device. .. In the case of double-sided printing, the printing paper just ejected from the printing unit has ink on the paper guide side. May come into contact with the surface of the product and cause scratches or stains on the printed surface. Therefore, in order to reduce the contact area between the portion where the printing paper is conveyed and the printing paper in the paper discharge unit, 5 to 7 rows of star wheel type paper guides are arranged in the paper feeding direction. I will guide you through the printing paper.

FIG. 2 is a schematic view of a conventional sheet-fed printing machine discharge device, FIG. 3 is a side view of a transport guide portion in the conventional sheet-fed press discharge device, and FIG. 4 is a conventional sheet-fed press discharge device. It is a top view of the conveyance guide part in an apparatus. 3A is an overall view, and FIG. 3B is an enlarged view of a suction wheel portion. In the figure, 11 is a part of a printing unit for performing printing on one side or both sides of a printing paper S 1 fed one by one from a feeder unit (not shown). Reference numeral 10 is a rubber copper, 12 is a feed cylinder, and 13 is an impression cylinder. The printing paper S printed by the blanket cylinder 10 and the impression copper 13 is discharged to the paper discharge unit 14 through the feed cylinder 12 and the impression cylinder 13. It

The paper discharge unit 14 is constructed by mounting an endless chain gripper 17 between sprockets 15 and 16, and the chain gripper 17 is provided with an unillustrated paper claw at predetermined intervals. .. The printing paper S discharged to the paper discharge unit 14 is sent from the impression cylinder 13 to the sprocket 15 portion, where the front edge is held by the paper nail. The chain gripper 17 is moved in the arrow direction by the rotation of the sprockets 15 and 16, and the printing paper S is also moved in the same direction accordingly.

A paper stacking device 20 is provided below the sprocket 16. The gripper claw of the chain gripper 17 releases the printing paper S when it moves directly above the paper stacking device 20. The printing paper S is sequentially deposited on the paper stacking device 20. Reference numeral 20a is a stopper for stopping the released printing paper S 1. In this way, the printing paper S is held by the jaws at the sprocket 15, is fed along the lower part of the chain gripper 17, is released at the sprocket 16 and is deposited on the paper stacking device 20. A conveyance guide portion 19 is provided so that the rear edge does not hang down while being conveyed between the sprockets 15 and 16. The transport guide portion 19 is composed of a first guide portion 19a and a second guide portion 19b, and is arranged so as to form a gap with the lower side portion of the chain gripper 17, and the paper is discharged by the gap. A channel 21 is formed. The front end of the printing paper S is held by the jaws of the paper, and the rear end of the printing paper S is conveyed in the paper discharge path 21 in a floating state.

By the way, in the case of double-sided printing, the printing paper S just ejected from the printing unit 11 has undried ink adhered to both sides thereof, and the paper ejection unit 14 is fed while being conveyed in the paper ejection path 21. If it touches part of the paper, it will rub or stain the printed surface. Therefore, as shown in FIGS. 3 and 4, the transport guide portion 19 is composed of a star wheel type paper guide.

The first guide portion 19 a is composed of plate-shaped paper guides 25 arranged in five rows in the width direction of the printing paper S, and the upper surface of each plate-shaped paper guide 25 is connected to the printing paper S. A plurality of star wheels 25a (not shown in the shape of FIG. 3A but shown only by imaginary lines) constituting the contact surface are arranged. Reference numerals 26a and 26b are side plates that form a frame of the first guide portion 19a. A plurality of guide bars 27 are extended between the side plates 26a and 26b, and each plate-shaped paper guide 25 has a guide bar 27. Supported by.

The star wheel 25 a is formed of a disk having teeth on its peripheral edge, and is rotatably supported by the plate-shaped paper guide 25. The printing paper S is held by the jaws of the chain gripper 17 and is conveyed on each star wheel 25a. At this time, the printing surface of the printing paper S contacts only the teeth of the star wheel 25a in the paper discharge path 21. Reference numeral 28 is a paper guide setting device for setting the plate-shaped paper guide 25 at a position in the width direction of the printing paper S. By operating the paper guide setting device 28, the plate-shaped paper guide 25 can be moved in the width direction along the guide bar 27 and placed at a predetermined position.

The second guide portion 19b is composed of a chain type paper guide 30 arranged in seven rows in the width direction of the printing paper S, and each chain type paper guide 30 includes a chain 30a and the chain. It is composed of star wheels 30b which are erected at predetermined intervals on 30a. Like the star wheel 25a, the star wheel 30b is formed of a disk having teeth on its peripheral edge, and is rotatably supported by the chain 30a. The printing paper S is held by the jaws of the chain gripper 17 and conveyed on each star wheel 30b. At this time, the printing surface of the printing paper S contacts only the teeth of the star wheel 30b in the paper discharge path 21.

The chain-type paper guide 30 has one end fixed to the support device 31 and the other end to which a weight 30c is fixed. The chain-type paper guide 30 is installed along the paper discharge path 21 by the gravity of the weight 30c. Further, the chain-type paper guide 30 can be moved by the distance indicated by the stroke St in the conveying direction of the printing paper S depending on the size of the printing paper S. That is, the supporting device 31 is moved to the left in FIG. 3 when the size of the printing paper S is small, and to the right when the size of the printing paper S is large, and is released from the jaws. , Is guided by the chain type paper guide 30 until just before being deposited on the paper stacking device 20 (FIG. 2).

A suction wheel 32 is rotatably arranged at the front end of the support device 31. The suction wheel 32 is connected to a vacuum source, and when the printing paper S is released from the jaw, the vacuum sucks the rear edge of the printing paper S and brakes it. The suction wheel 32 is supported by a shaft 32b and is rotated by the rotation of the shaft 32b. The suction wheel side member 33 of the support device 31 is formed with a hole that communicates with the suction wheel 32. Reference numeral 34 is a pipe connected to the hole.

Reference numeral 35 denotes a shaft having a rectangular cross section for supporting the support device 31. By moving each support device 31 along the shaft 35, the position of the chain type paper guide 30 in the width direction can be changed. it can. By the way, in the transport guide portion 19 having the above-described structure, the teeth of the plurality of star wheels 25a and 30b and the printing paper S are in point contact with each other, so that it is possible to reduce rubbing and stains generated on the printing surface, but it is still somewhat A scratch remains.

Therefore, when the printing paper S has a folding margin or a cutting margin, the folding margin or the cutting margin is used as a margin portion, and in the case where a large number of independent patterns are printed on the printing paper S, the printing paper S The plate-shaped paper guide 25 and the chain-type paper guide 30 are moved in the width direction of the printing paper S so that the pattern is arranged along the transport direction of S, leaving a strip-shaped margin, or the margin is removed. The positions of are changed so that the teeth of the star wheels 25a and 30b come into contact with the margins. By doing so, the teeth of the star wheels 25a and 30b do not come into contact with the inked ink, and it is possible to prevent the printing paper S from being scratched.

[0014]

[Problems to be solved by the device]

 However, in the above-described conventional sheet-fed printing press discharge device, the plate-shaped paper guide 25 and the chain-type paper guide 30 are moved in the width direction of the printing paper S or the position of the above-mentioned margin is changed. However, it is not always possible to align the margin with the plate-shaped paper guide 25 and the chain-type paper guide 30, and it is necessary to form an additional margin more than necessary.

Further, it is not necessary to originally form a blank portion, and even when the pattern and the pattern are arranged adjacent to each other, the blank portion needs to be formed, and the printing paper S is wasted. Cutting work is required at the time of finishing. Furthermore, the plate-shaped paper guide 25 and the chain-type paper guide 30 are moved along the guide bar 27 and the shaft 35 so that the margins and the teeth of the star wheels 25a and 30b come into contact with each other. It is necessary to perform the above adjustment work every time the type of S changes, and the work cost increases. However, when printing a pattern over the entire surface of the printing paper S or a large pattern without a margin, it is possible to prevent scratches from being caused by contact with the teeth of the star wheels 25a and 30b. Can not.

If the spaces between the plate-shaped paper guides 25 and the chain-type paper guides 30 are widened, the printing paper S sags, contacts with parts such as the guide bar 27, and is rubbed or soiled. I will end up. The present invention solves the above-mentioned problems of the conventional sheet-fed printing press discharge device, and the print surface of the print paper contacts a part of the discharge unit in the discharge path to cause rubbing and dirt. It is an object of the present invention to provide a sheet-fed printing press discharge device that does not require adjustment work for adjusting the size and print content of the printing paper.

[0017]

[Means for Solving the Problems]

 Therefore, in the sheet-fed printing press discharge device of the present invention, a chain gripper is provided which is installed between two sprockets and is provided with a pawl claw at regular intervals. A paper guide is disposed opposite to and forms a paper discharge path between the two. The surface of the paper guide is composed of a porous layer, and air is jetted from the surface toward the printing paper conveying orbital surface of the chain gripper.

The paper guide includes a paper guide main body having an opening on a side of the chain gripper facing the printing paper conveyance track surface, and a baking unit that covers the opening of the paper guide main body and forms a space in the paper guide main body. It has a porous layer made of a bonded body and a means for supplying air into the space.

[0019]

[Action]

 According to the present invention, the chain gripper is provided between the two sprockets as described above, and the gripper is provided at regular intervals, and the printing paper is held by the gripper. There is. The printing paper can be conveyed while being driven by the sprocket to move the chain gripper and held by the jaws.

A paper guide is arranged so as to face the surface of the chain gripper for conveying the printing paper, and a paper discharge path is formed between the two. The surface of the paper guide is made up of a porous layer, and air is jetted from the surface toward the surface of the chain gripper for conveying the printing paper. The paper guide is composed of a paper guide body having an opening on the side of the chain gripper that faces the printing paper conveyance track surface, and a sintered body that covers the opening of the paper guide body and forms a space in the paper guide body. And a means for supplying air into the space.

An air layer is formed in the paper discharge path along the surface of the paper guide conveying path of the paper guide, and the front end of the print paper is held by the jaws and the trailing edge is ejected. To be suspended. Therefore, the printed paper does not come into contact with other parts when being conveyed through the paper discharge path.

[0022]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view of a sheet-fed printing press sheet discharging device of the present invention, and FIG. 5 is a schematic diagram of a transport guide portion in the sheet-fed printing press sheet discharging device of the present invention. 5A is a plan view of the transport guide portion, FIG. 5B is a sectional view, and FIG. 5C is an enlarged view of the porous layer.

In the figure, reference numeral 11 is a printing unit for printing on one side or both sides of the printing paper S 1 fed one by one from a feeder unit (not shown). Reference numeral 10 is a rubber copper, 12 is a feed cylinder, and 13 is an impression cylinder. The printing paper S printed by the blanket cylinder 10 and the impression copper 13 is discharged to the paper discharge unit 14 via the above-mentioned feed cylinder 12 and impression cylinder 13. To be done. The paper discharge unit 14 is constructed by installing an endless chain gripper 17 between sprockets 15 and 16, and the chain gripper 17 is provided with a paper clip claw 17a at predetermined intervals. The printing paper S discharged to the paper discharge unit 14 is sent from the above-mentioned impression cylinder 13 to the sprocket 15 portion, where the front edge is held by the jaws 17a. The chain gripper 17 is moved in the arrow direction by the rotation of the sprockets 15 and 16, and the printing paper S is also moved in the same direction accordingly.

A paper stacking device 20 is provided below the sprocket 16. The gripper 17a of the chain gripper 17 releases the printing paper S when it moves directly above the paper stacking device 20. The printing paper S is sequentially deposited on the paper stacking device 20. Reference numeral 20a is a stopper for stopping the released printing paper S. In this way, the printing paper S is held by the jaws 17a at the sprocket 15, is sent along the lower side of the printing paper conveying track surface of the chain gripper 17, and is released at the sprocket 16 to release the paper stacking device. A paper guide 51 is provided so that the trailing edge does not hang down while being transported between the sprockets 15 and 16 while being piled up on 20. The paper guide 51 is arranged so as to form a gap between the paper guide 51 and the lower portion of the surface of the chain gripper 17 for conveying the printing paper, and the paper discharge path 21 is formed by the gap. The front end of the printing paper S is held by the jaws 17a, and the rear end of the printing paper S is conveyed in the paper discharge path 21 in a floating state.

By the way, in the case of double-sided printing, the printing paper S just discharged from the printing unit 11 has undried ink on both sides, and the paper is discharged while being conveyed in the paper discharge path 21. If a part of 14 is touched, rubbing or stain will occur on the printing surface. Therefore, the paper guide 51 is formed of a flat box body formed along the paper discharge path 21, and has a porous layer 53 on the surface facing the paper discharge path 21, and the porous layer 53. The air is designed to be jetted from the entire surface.

Next, details of the paper guide 51 will be described. In FIG. 5, reference numeral 51a denotes a box-shaped paper guide body having an opening on the side of the chain gripper 17 that faces the printed paper conveying orbital surface, and 53 covers the opening of the paper guide body 51a and is made of a polyethylene sintered body. The porous layer 54 is a joint for connecting an air supply pipe from a blower (not shown), 55 is a receiving member for the porous layer 53, and 56 is a pressing member for pressing the porous layer 53 from above. .. If the porous layer 53 is fixed to the receiving member 55 with an adhesive, the pressing member 56 is unnecessary.

Reference numeral 57 is a partition wall that rises from the bottom surface of the paper guide body 51 a, and the inside of the paper guide 51 is divided into a plurality of spaces 58, and air is independently supplied to each space 58 via the joint 54. A pressure of about 1000 mmHg can be obtained in the space 58. Then, the air supplied to each space 58 fills the entire space 58, and then is jetted from the surface through the minute gaps in the porous layer 53.

In this case, the flow of air is decelerated in the porous layer 53 and is jetted at a uniform velocity to form an air layer on the surface of the porous layer 53. Therefore, the printing paper S does not flutter due to the blowing force of the air, and is conveyed along the paper discharge path 21 in a stable floating state. Moreover, noise does not occur when air is blown out. It is possible to selectively open the air amount adjusting valve (not shown) of the air supply pipe for supplying air into the space 58, and change the width of the air ejected according to the size of the width S of the printing paper S. it can. In this case, air is not ejected from unnecessary portions, so that the amount of air used can be reduced. Further, by operating the air amount adjusting valve to adjust the amount of supplied air, the printing paper S having various weights can be placed in an appropriate floating state in the paper discharge path 21. Reference numeral 59 is a mounting bracket for the paper guide 51.

FIG. 6 is a schematic view of a transport guide portion in the second sheet-fed printing press sheet discharging device of the present invention. FIG. 7A is a plan view of the transport guide portion, and FIG. In the figure, 51 is a paper guide, 51a is a paper guide main body, 53 is a porous layer made of polyethylene sintered body, 54 is a joint for connecting an air supply pipe from a blower (not shown), and 59 is the above-mentioned porous body. A receiving member for the layer 53, a pressing member 56 for pressing the porous layer 53 from above, and a space 60 for supplying air through the joint 54. In this embodiment, the porous layer 53 has a size that covers the entire surface of the paper guide body 51a, and the space 60 is also integrally formed in the paper guide body 51a.

It should be noted that the present invention is not limited to the above embodiments, and various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0031]

[Effect of the device]

 As described above in detail, according to the present invention, the paper guide is disposed on the chain gripper so as to face the print paper transporting track surface, and the paper discharge path is formed between the two. The surface of the above-mentioned paper guide is composed of a porous layer, and air is jetted from the surface toward the surface of the chain gripper for conveying the printing paper. The paper guide includes a paper guide body having an opening on the side of the chain gripper that faces the printing paper conveyance track surface, and a sintering process that covers the opening of the paper guide body and forms a space in the paper guide body. It has a porous layer composed of a body and means for supplying air into the space.

An air layer is formed along the paper guide in the paper discharge path, and the front end of the printing paper is held by the jaws, and the trailing edge of the printing paper is floated by the jetted air layer. Therefore, the printing paper does not come into contact with other components when it is conveyed through the paper discharge path, and it is possible to prevent the printing surface from being rubbed or stained. Moreover, since the air is jetted from the porous layer, not only the air flow becomes very slow, but also the air penetrates the porous layer after it is filled in the entire space, so that it is uniform from the entire porous layer. It is injected as a flow. Therefore, the printing paper does not flap due to the blowing force of air.

[Brief description of drawings]

FIG. 1 is a schematic view of a sheet ejection device of the present invention.

FIG. 2 is a schematic view of a conventional sheet-fed printing press discharge device.

FIG. 3 is a side view of a conveyance guide unit in a conventional sheet-fed printing press sheet ejection device.

FIG. 4 is a plan view of a conveyance guide portion in a conventional sheet-fed printing press sheet ejection device.

FIG. 5 is a schematic view of a conveyance guide unit in the sheet ejection device of the sheet-fed printing press according to the present invention.

FIG. 6 is a schematic view of a conveyance guide unit in a second sheet-fed printing press sheet discharging device of the present invention.

[Explanation of symbols]

15, 16 sprocket, 17 chain gripper, 17a gripper claw, 21 paper discharge path, 51 paper guide, 51a paper guide body, 53 porous layer, 58 space

Claims (1)

[Scope of utility model registration request] 1. (a) a chain gripper that is installed between two sprockets and is provided with pawls at regular intervals; and (b) that is disposed so as to face the surface of the chain gripper for conveying the printing paper. And a paper guide that forms a paper discharge path between the two and ejects air from the surface toward the printing paper transporting track surface of the chain gripper. (C) The paper guide is the printing paper of the chain gripper. A paper guide main body having an opening on the side facing the transport track surface, a porous layer made of a sintered body that covers the opening of the paper guide main body and forms a space in the paper guide main body, and air in the space. A sheet-fed printing press ejecting device having means for supplying the sheet.