JP2002179314A - Sheet object ejector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet object ejector that can effectively prevent a jam of a sheet object in an impeller and the like irrespective of the feed speed of the sheet object and the like. SOLUTION: A signature 9 fed by a pair of paper ejection belts 6 is ejected onto a paper ejection conveyor via the impeller 7 disposed below the paper ejection belts 6. In a signature holding part of the impeller 7, an air blower 20 is disposed for bending the trailing edge of the signature 9 upstream with respect to the direction of rotation of the impeller 7 so as to prevent it from covering a holding part for the next signature 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet discharging device such as a sheet discharging device of a folding machine in a web-fed rotary printing press.

[0002]

2. Description of the Related Art A web rotary press is provided with a folding machine that cuts a web, which has been dried and cooled after printing, at predetermined lengths, and folds the web in a width direction or a length direction. I have.

FIG. 3 is a schematic side view of this kind of folding machine. To explain this, the folding machine 1 comprises a folding cylinder 2, a cutting cylinder 3 and a holding cylinder 4 which rotate in the directions shown by arrows in the figure. The printed web 5 provided to the folding machine 1 from a printing unit (not shown) is fed between the folding cylinder 2 and the cutting cylinder 3.

The web 5 is cut into a predetermined size between the two cylinders 2 and 3 and wound around the folding cylinder 2 by a needle (not shown) of the folding cylinder 2. When the knife (not shown) of the folding cylinder 2 is operated and the gripping plate (not shown) of the gripping cylinder 4 is gripped, the substantially central portion is wound around the gripping cylinder 4 while being folded.

[0005] The web 5 folded in this way is transported by being sandwiched between paper discharge belts 6, which are stretched up and down, is discharged onto a paper discharge conveyor 8 by an impeller 7 and is transported to a predetermined position. Is done. As a result, a two-fold (parallel fold) signature indicated by reference numeral 9 is obtained.

A chopper folding device 10 having a chopper blade that moves up and down is provided in the signature transfer path by the paper discharge belts 6 and 6, and below the same as the impeller 7. An impeller 11 having a structure is mounted on the impeller 7 so as to be orthogonal to the axial direction.

When it is desired to obtain a four-fold (chopper-folded) signature as indicated by reference numeral 12, the chopper folding device 10 is operated, and the signature 9 being transported by the paper discharge belts 6, 6 is obtained. Folded from the center by chopper folding device 10,
The paper is discharged onto the discharge conveyor 8 by the impeller 11 and transferred.

As described above, two types of signatures 9 and 12 can be selectively folded by one folding machine. still,
In the figure, reference numeral 13 denotes a contact (stripper) which is provided below the impeller 7 and is provided fixedly and guides the signature 9 carried by the impeller 7 onto the paper discharge conveyor 8 below.

[0009]

By the way, in the above-described paper discharge device, depending on the conveyance speed of the paper discharge belt and the impeller with respect to the signature, the fold that has entered the holding portion between the blades of the impeller. If the tail side of the signature (projecting from the holding part) curves downstream in the rotation direction of the impeller, it will cover the holding part of the subsequent signature, thereby interfering with the subsequent signature. Paper jams and the like.

The present invention solves such a problem, and discharges a sheet-like material that can effectively avoid paper jam of the sheet-like material in the impeller, regardless of the conveying speed of the sheet-like material. It is intended to provide a device.

[0011]

According to the present invention, there is provided an apparatus for discharging a sheet-like material, wherein the sheet-like material is sent to a holding section between the blades and rotatably conveyed. And attitude regulating means for regulating the rear end side of the sheet-like material held by the impeller so as not to cover the holding portion of the next sheet-like material.

Further, the attitude regulating means is an air blowing device.

[0013] Further, the attitude regulating means is a bending device for bending the impeller in the rotation direction of the impeller.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sheet discharging apparatus according to the present invention will be described below in detail with reference to the drawings.

[Embodiment] FIG. 1 is a side view of an impeller portion of a paper ejection device of a folding machine according to an embodiment of the present invention, and FIG. 2 is a plan view of the air blowing device. In these drawings, the same members as those in FIG. 3 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 1, a pair of discharge belts 6,
The signature (sheet-like material) 9 conveyed at 6 is discharged onto a discharge conveyor (not shown in FIG. 3) via an impeller 7 arranged below the discharge belts 6. It is supposed to be paper. Then, an air blowing device (posture) for actively bending (bending) the trailing side of the signature 9 toward the upstream side in the rotation direction of the impeller 7 at the signature entry portion (holding portion) between the blades of the impeller 7. 20 which is both a regulating means and a bending device).

As shown in FIG. 2, the air blowing device 20 includes a rotating shaft 22 rotatably mounted between a pair of frames 21 and 21 and having a chamfered portion 22a formed in a part of the outer periphery in the axial direction. A cylindrical valve housing 24 fitted to the rotating shaft 22 so as to cover the chamfered portion 22a and fixed to the frame 21 by a bracket 23; a blade (not shown) extending from one side of the valve housing 24; A plurality of air nozzle pipes 25 (three in the illustrated example, three provided at predetermined intervals in the axial direction) with air outlets 25a each approaching an axial gap of the car 7, The air supply pipe 26 has one end connected to its side and the other end connected to a pressurized air supply source such as a compressor (not shown). In FIG. 2, reference numeral 27 denotes an O-ring for airtightly fitting the valve housing 24 to the rotary shaft 22, and reference numeral 28 denotes a bearing for permitting the rotary shaft 22 to rotate.

The rotating shaft 2 protruding out of the frame 21
A gear 29 is fixedly mounted at one end of the gear 2 and is connected to the driving side of the folder through a gear train (not shown).

Therefore, the rotating shaft 22 is driven to rotate in synchronization with the folding machine. And in this embodiment,
When the trailing side of the signature 9 reaches the signature entry part of the impeller 7,
Pressurized air is blown out from a blowout port 25a of each air nozzle tube 25. In other words, each air nozzle pipe 2
5 and the air supply pipe 26 are synchronized with the above-mentioned time.

By the way, in the conventional paper discharge device of a folding machine, as described above, when the signature 9 conveyed by the pair of paper discharge belts 6 and 6 is conveyed and held by the impeller 7, the paper is discharged. Depending on the conveyance speed of the belts 6 and 6 and the impeller 7 with respect to the signature 9, when the trailing side of the signature 9 that has entered the holding portion of the impeller 7 curves downstream in the rotation direction of the impeller 7, This would cover the signature holding section, thereby interfering with the subsequent signature 9 and possibly causing a paper jam or the like.

However, in this embodiment, when the trailing side of the signature 9 reaches the holding portion of the impeller 7, each air nozzle pipe 2
5, pressurized air is blown out at once. As a result, the tail side of the signature 9 is instantly largely relieved (positively bent) to the upstream side in the rotation direction of the impeller 7. As a result, regardless of the conveying speed of the signature 9, the signature 9
Does not cover the holding section of the subsequent signature, so that it is possible to prevent the subsequent signature 9 from interfering and causing a paper jam or the like.

Further, in this embodiment, since the rotary shaft 22 constituting the rotary valve is rotationally driven in mechanical synchronization with the folding machine, it is easy to adjust the timing of blowing the compressed air. Also, by changing the size of the chamfered portion 22a, the amount of blown-out compressed air can be easily changed.

Further, the present invention can be realized at low cost by using an easily available pressurized air supply source, and the signature 9 can be controlled in a non-contact manner, thereby enabling smooth conveyance.

The present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. For example, the air blowing device 20 may be electrically configured using an electromagnetic valve, a signature detection sensor, or the like. Further, as the posture restricting means, a mechanical means for moving the push rod or the like forward and backward to insert and hold the tail of the signature straight or positively bending the impeller in the rotation direction of the impeller may be used. Of course, the air blowing device 20 may be regulated so that the tail of the signature is inserted and held straight in the holding portion.

[0025]

As described above in detail with reference to the embodiments, according to the sheet discharging device of the present invention, the sheet discharged is held by the holding portion between the blades and rotated. It is characterized by comprising an impeller to be conveyed, and a posture regulating means for regulating a rear end side of the sheet-like material held by the impeller so as not to cover a holding portion of the next sheet-like material. In addition, regardless of the conveying speed of the sheet-like material, paper jam of the sheet-like material in the impeller can be effectively avoided.

Further, since the attitude regulating means is an air blowing device, the attitude regulating means can be realized at low cost by using a readily available pressurized air supply source, and can control a sheet-like material in a non-contact manner. And smooth conveyance is possible.

[0027] Further, since the attitude restricting means is a bending device for bending the impeller in the rotation direction side,
Various bending devices can be selected and adopted, increasing versatility.

[Brief description of the drawings]

FIG. 1 is a side view of an impeller unit in a paper ejection device of a folding machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the air blowing device.

FIG. 3 is an overall side view of a folding machine according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Folding machine 2 Folding cylinder 3 Cutting cylinder 4 Holding cylinder 5 Web 6 Discharge belt 7 Impeller 8 Discharge conveyor 9 Signature 10 Chopper folding device 11 Impeller 12 Signature 13 Contact (stripper) 20 Air blowing device 21 Frame 22 Rotating shaft 22a chamfered portion 23 bracket 24 valve housing 25 air nozzle tube 25a air outlet 26 air supply tube 27 O-ring 28 bearing 29 gear

Claims (3)

[Claims] 1. An impeller for rotating and transporting a fed sheet-like material while holding it at a holding portion between blades, and a rear end side of the sheet-like material held by the impeller for a next sheet-like material. A sheet discharging device comprising a posture restricting means for restricting an object holding portion from being covered. 2. The sheet discharging device according to claim 1, wherein said attitude regulating means is an air blowing device. 3. The sheet discharging device according to claim 1, wherein the posture restricting means is a bending device that bends in a rotation direction of the impeller.