JP2998787B2 - Theta for printing machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheeter for a printing press, and more particularly, to a printing web fed from a rotary printing press or a web fed from a stock roll to a predetermined length, and cuts the cut paper at a high speed. The present invention relates to a theta that can be transported to a stack unit and stacked.

[0002]

2. Description of the Related Art The final stage of a web offset printing press includes:
A sheeter device that cuts a print web fed from a printing press unit into a predetermined length to form a single-wafer sheet, decelerates this, feeds the stack to a stack unit, and sequentially stacks is installed online or offline. . This theta device applies a tension to the cut section that cuts the print web conveyed at a high speed at the printing speed, so that the cut length at this cut section does not vary, and also stacks the paper at the subsequent low-speed section. A high-speed transport unit that transports at a speed slightly higher than the printing speed to take timing, etc., and a low-speed transport unit that reduces the transport speed to a speed that does not affect lamination for lamination to the final stack unit. It has.

In this type of theta, there is a problem of a deceleration process for transferring a cut sheet from a high-speed transport section to a low-speed transport section. Conventionally, the leading end of the cut sheet discharged from the high-speed transport section contacts the low-speed transport section. In general, a method is adopted in which a cut sheet that is bent and conveyed is aligned while being received by a deceleration roll (squaring roll) and placed on a low-speed conveyance unit, and then conveyed by the low-speed conveyance unit. For this reason, the high-speed transport belt is arranged on the exit side of the cut section, and the low-speed transport belt is arranged in parallel with the high-speed transport belt, and the reduction roll is arranged almost at the upper center position of the low-speed transport belt. . The stacking section is arranged in series at the discharge end of the low-speed belt, and the stacking section has a lifting table arranged in a space surrounded by a regulating plate (jogger) arranged along the four sides of the cut sheet. It is structured so that cut paper discharged at low speed is stacked and received. Therefore, the cut sheet decelerated from the high-speed belt by the deceleration roll and transferred onto the low-speed transport belt is discharged from the low-speed belt, supplied to the stack portion, and stacked on the upper surface of the previously stacked cut sheet. .

FIG. 12 is a schematic structural view of a conventional rotary printing press sheeter. Theta 10 includes a cutting unit 14, a high-speed transport unit 16, and a low-speed transport unit 1 along a flow direction of a print web 12 sent from a print unit (not shown).
8 and a stack unit 20. The printing web 12 from the printing unit is introduced into the cut section 14 through a plurality of guide rolls 22. At the entrance of the cut section 14, a draw roll 24 and a press roll 2 which is in contact with the draw roll 24 are provided.
6 are provided. The draw roll 24 is driven to rotate at a speed slightly higher than the printing cylinder of the printing unit, and the cutting unit 14 cuts the web 12 at a speed slightly higher than the printing speed and conveys the web 12 to the subsequent stage.

[0005] The printing web 12 fed from the draw roll 24 is introduced into the cutting section 14, which is constituted by a fly knife 30 rolled on the upper surface of the printing web 12 and a fixed knife arranged on the lower surface. Have been. The fly knife 30 is provided with knives at one or two locations on the outer peripheral portion of the knife cylinder, and cuts the print web 12 to a predetermined length at a peripheral speed higher than the transport speed of the print web 12. As a result, the cut sheet is discharged from the cut section 14.

A high-speed transport section 16 and a low-speed transport section 18 are continuously arranged from the exit of the cut section 14 in the direction of paper flow. It comprises a high-speed tape means 32 and a lower low-speed tape means 34. An upper pressing tape 36 is provided on the upper surface of the cut sheet fed by the high-speed and low-speed tape means 32, 34.

The lower high-speed tape means 32 includes a pair of rolls 3.
The transport tape 32T is wound around between 2A and 32B, and the transport tape 32T is driven to rotate at a speed higher than the printing speed (the transport speed of the print web 12) by using the outlet roll 32B as a drive roll. The cut sheets discharged from the cut section 14 are spaced from each other. Similarly, the lower low-speed tape means 34 is formed by winding a transport tape 34T between a pair of rolls 34A, 34B, and using the transport tape 34T as a drive roll and cutting the transport tape 34T into the stack unit 20. Circular driving is performed at a low speed so that feeding is possible. The upper pressing tape means 36 disposed on the upper surface of the lower high-speed tape means 32 and the lower low-speed tape means 34 faces each other so that a paper conveyance gap is formed between the high-speed tape means 32 and the low-speed tape means 34.
The surface of the cut paper conveyed on the tape means 32, 34 is pressed, and the cut paper is driven to rotate at a conveyance speed corresponding to the conveyance speed of the high-speed tape means 32.

[0008] The cut paper is formed by the above-mentioned tape means 32, 34,
In order to shift from the high-speed state to the low-speed state, a speed reduction roll 40 is provided on the upper pressing tape means 36 side in a portion facing the low-speed tape means 34. The deceleration roll 40 receives the leading end of the cut paper conveyed at a high speed in a gap between the cut paper and the low-speed tape means 34, and transfers the cut paper to the low-speed tape means 34 side to reduce the speed. It is configured to be rolled on the surface of the substrate 34 with a light contact pressure.

The low-speed tape means 34 is driven by the speed reduction roll 40.
The cut paper transferred to the nip roll 42 is transported at the speed of the low-speed transport tape at the tip of the tape means 34.
While being suppressed by the above, it is discharged to the stack unit 20, where it is stacked and piled.

[0010]

However, in the conventional theta, the lower high-speed tape means 32 and the lower low-speed tape means 34 are mainly transported, and the upper pressing tape means 36 faces the upper surface of the cut sheet to form a transport gap. And a lower speed tape means 32
Is transferred to the lower low-speed tape means 34. For this reason, the actual conveyance of the cut sheet is to be transferred from the high-speed state by the high-speed tape unit 32 to the low-speed tape unit 34 by the deceleration roll 40, and then completely transferred to the stable low-speed state before being sent out to the stack unit 20. Has become. Accordingly, on the low-speed tape means 34, the leading end of the succeeding cut sheet is positioned slightly behind the leading end of the preceding cut sheet, and most of the sheets are continuously laminated in a state of being overlapped with the preceding cut sheet. This is sent to the stack section 20 which is close to the exit roll 34B of the low-speed tape means 34, and is piled. For this reason, after shifting to a stable low-speed state, the stack unit 20
Therefore, it is necessary to take a long time until the piling, and to secure a sufficient transport distance of the low-speed tape unit 34.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheeter for a printing press capable of improving the processing efficiency by shortening the processing time from cutting of a print web to piling, focusing on the above-mentioned conventional problems. . Another object of the present invention is to provide a printing press sheeter having a structure capable of shortening the transport distance.

[0012]

In order to achieve the above object, a sheeter for a printing press according to the present invention comprises a lower high-speed tape and a lower low-speed tape on the exit side from a cutting section for cutting a web into sheets. A printing press sheeter that is arranged in tandem along the transport direction, arranges an upper high-speed tape along the upper surface of the transported cut paper, and provides a stack of cut papers on the discharge end side of the lower low-speed tape. ,

The cut paper can be transferred from the lower high-speed tape means to the upper high-speed tape means and from the upper high-speed tape means to the lower low-speed tape means. At least the upper high-speed tape means and the lower low-speed tape means are provided with suction means. The transfer means from the upper high-speed tape to the lower low-speed tape is formed by a snapper that periodically contacts the conveying surface of the lower low-speed tape means, and the cut that is conveyed by the upper high-speed tape and reaches the upper portion of the stack portion by the snapper. An air blow portion is provided which enables the bottom portion of the paper to be pressed against the low-speed tape, and covers an upper surface portion of the stack portion following the transport surface of the upper high-speed tape means, and air from the air blow portion is sent to the stack portion. While blowing out along the cut paper transport surface, the cut paper is It is characterized in that for stacked Eject and.

[0014]

According to the above construction, the cut sheet cut and discharged at the cutting section is first conveyed by the lower high-speed tape means, and thereafter, the conveyance surface is shifted by the upper high-speed tape means to be suction-conveyed. You. The cut paper conveyed by the upper high-speed tape means is then transferred to the lower low-speed tape means by the transfer means. At this time, due to the inertia effect of the conveying speed of the upper high-speed tape means, the front end half of the cut paper is stacked. The upper end of the paper is in the suction state on the upper high-speed tape means side, but the suction state of most parts has been released. In such a state, the trailing edge of the cut sheet is forcibly transferred to the lower low-speed tape means by the transfer action of the snapper that periodically contacts the conveyance surface of the low-speed tape means, and the conveyance speed shifts to low speed.
At this time, the air blown out from the air blow unit provided on the upper surface of the stack simultaneously acts on the upper surface of the cut sheet to guide the sheet in the transport direction. At that time, the leading end of the cut sheet does not reach the front jogger of the stack portion, and the remaining portion is gradually introduced into the stack portion at a low speed and is gently placed on the preceding stacking surface. For this reason, the cut sheet to be conveyed is conveyed at a high speed to a state in which it is sent to the upper surface of the stack portion substantially at least halfway, and only the trailing edge portion is decelerated and conveyed by the low-speed tape means, and the paper is sent in the conveying direction by air blow. As a result, the low-speed distance can be shortened while increasing the high-speed transport distance, and the transport time from the cut section to the stack section can be greatly reduced to improve the time efficiency.
Also, since the low-speed tape means basically only needs to be able to convey the bottom of the cut sheet, the overall length can be significantly reduced, and the theta can be reduced in size by shortening the overall length of the theta. In particular, in the present invention, the contact time of the stack portion with the preceding pile is shortened, and at the same time, the air is quickly extracted from the surface of the preceding pile.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a sheeter for a printing press according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing the overall structure of a rotary printing press sheeter according to an embodiment. Theta 10 according to the embodiment
0 indicates a cutting unit 104, a lower high-speed tape unit 106, an upper high-speed tape unit 108, a lower low-speed tape unit 110, and a stack unit 112 along the flow direction of the print web 102 sent from a printing unit (not shown). It has. The print web 102 from the printing unit is introduced into the cut section 104 via a plurality of guide rolls. At the entrance of the cut section 104, a draw roll 114 and a press roll 116 which is in contact with the draw roll 114 are provided. . The draw roll 114 is driven to rotate in accordance with the printing speed of the printing unit, and supplies the web 102 to the cutting unit 104 at the same speed as the printing speed.

The print web 102 fed from the draw roll 114 is introduced into the cutting section 104, which is a fly knife 1 which is rolled on the upper surface of the print web 102.
18 and a fixed knife 120 disposed on the lower surface. The fly knife 118 is provided with knives at one or two locations on the outer peripheral portion of the knife body, and cuts the print web 102 to a predetermined length at a peripheral speed higher than the transport speed of the print web 102. . As a result, the cut sheet is discharged from the cut unit 104.

A conveying means is tandemly arranged in the direction of paper flow from the exit of the cut section 104. This is a lower high-speed tape means which is arranged on the lower surface of the cut paper and conveys while sucking the lower surface of the paper. And the upper high-speed tape unit 10 to which the cut paper sent from the lower high-speed tape unit 106 is delivered and conveyed while sucking the upper surface of the cut paper.
8, and a lower low-speed tape unit 110 which delivers the cut sheet conveyed by the upper high-speed tape unit 108 and conveys the cut paper again in the state of suction on the lower surface. That is, the cut sheet continuously takes each mode of the lower surface suction high-speed transport, the upper surface suction high-speed transport, and the lower surface suction low-speed transport,
The transport path moves from the exit of the cutting section 104 to the stack section 112.

As shown in detail in FIGS. 2 and 3, the lower high-speed tape means 106 includes a plurality of transport tapes 106 between a pair of rolls 106A and 106B disposed on the inlet side and the outlet side.
T is wound around and a tension roll 106C for applying tension is provided in the middle of the tape return transport path. The transport tape 106T is a roll 106 on the exit side.
B is used as a driving roll to be driven to rotate.
, And can be driven to rotate at a high speed that is set faster than that of the sheet, and the cut sheets discharged from the cutting unit 104 are conveyed with a gap so as not to overlap each other. The drive roll 106B on the outlet side is rotated by a belt drive on a pulley 128 attached to the end of the roll shaft, and is attached to the frame side plate 130 so as to wind around the roll pulley 128 at a predetermined winding angle. Driving pulley 132 and reversing pulley 134,
Drive unit 13 that rotates around the intermediate pulley 136
8 is driven to rotate.

The cut paper transport surface of the lower high-speed tape means 106 is the outer surface of a plurality of transport tapes 106T moving from the inlet roll 106A toward the outlet roll 106B. A vacuum box 140 is provided between the pair of rolls 106A and 106B to form a sliding surface of the tape 106T so as to carry the tape. The vacuum box 140 is formed as a hollow container, and a suction duct 142 provided at the lower left and right positions is connected to a suction pump (not shown) so that the inside can be brought into a negative pressure state. A plurality of long holes 144 are opened in each tape sliding surface region of the vacuum box 140, and the long holes 144 are covered by the back surface of the transport tape 106T.
A plurality of suction holes 146 are opened over the entire length of each tape 106T. Thereby, the tape 10
When 6T slides on the sliding surface of the vacuum box 140, the negative pressure of the vacuum box 140 is reduced by the suction through hole 146.
Acts on the back surface of the cut sheet conveyed through the tape, and the cut sheet is suction-conveyed together with the tape in a state of being suction-contacted to the tape 106T.

In addition, a nip roll 147 is rolled in contact with the inlet side roll 106A of the lower high-speed tape means 106, and the leading end of the cut paper discharged from the cut section 104 is introduced into the lower high-speed tape means 106 to smoothly. High-speed suction transfer is possible. Also, at the exit of the lower high-speed tape means 106, the next upper high-speed tape means 10
The lift guide 148 obliquely intersects the gap between the tape means 106 and 108 as a means for delivering the cut sheet to the tape 8.
Is provided. This is the vacuum box 14
0 is bent obliquely toward the front in the paper feeding direction, and the leading end protrudes from the gap between the tapes 106T to the upper surface of the transport surface, and the protruding leading end is formed in an arc shape. And is formed so as to follow the outer peripheral surface of the outlet side roll 106B. The tip bending portion obliquely traverses the gap between the upper high-speed tape means 108.

Next, the upper high-speed tape means 108 which receives the cut paper conveyed by the lower high-speed tape means 106 and conveys the cut paper at a high speed while sucking the upper surface thereof is constructed as follows. As shown in FIG. 1 and FIGS. 4 to 6, the upper high-speed tape unit 108 is provided with an entrance-side roll 108 </ b> A disposed along the cut sheet conveying surface.
And an outlet-side roll 108B. Inlet roll 1
08A is located just above the front end of the vacuum box 140 of the lower high-speed tape means 106,
08T is arranged so as to overlap with the transport surface of the lower high-speed tape means 106, and can receive the cut sheet lifted by the above-described lift guide 148. Further, the exit side roll 108B is the stack unit 1
12, where the cut paper conveyed at a high speed can be directly supplied to the stack unit 112. In order to circulate the transport tape 108T, an intermediate roll 108C supported at the upper edge of the frame side plate 130 so as to be located above the rolls 108A and 108B.
And a drive roll 108D, and the transport tape 108T is wound between these rolls. The drive roll 108D belt-drives a pulley 108DP provided at the end of the roll shaft by a drive source (not shown) to directly apply a circling drive force to the transport tape 108T wound around the drive roll 108D. As the driving source, the driving force of the rotary printing press may be used for the theta device. The transport speed of the upper high-speed tape unit 108 is set to be equal to that of the lower high-speed tape unit 106 at the preceding stage, and therefore, it is possible to rotate at a transport speed slightly higher than the printing speed.

The cut sheet conveying surface of the upper high-speed tape means 108 is a downwardly directed outer surface of a plurality of conveying tapes 108T moving from the inlet roll 108A toward the outlet roll 108B. Make a pair of rolls 108A and 108B so that
A vacuum box 150 is provided between the vacuum boxes 150 to form the sliding surface of the tape 108T. This vacuum box 150 is formed as a hollow container as in the case of the lower high-speed tape means 106, and a suction duct 152 provided at the upper portion of the box is connected to a suction pump (not shown) so that the inside can be made in a negative pressure state. . Each tape running surface area of the vacuum box 150 has a plurality of long holes 1.
54 are opened, and the long holes 154
08T is covered by the back surface. A plurality of suction holes 156 are opened over the entire length of each tape 108T. Thereby, the tape 108T
Slides on the sliding surface of the vacuum box 150,
The negative pressure of the vacuum box 150 acts on the surface of the cut sheet to be conveyed through the suction through hole 156, and the cut sheet is suctioned and conveyed together with the tape 108T while being in close contact with the tape 108T. The above-mentioned upper high-speed tape means 108
Are configured so that the upstream and downstream sides of the transport can open the transport surface, respectively. For this reason, the front arm 158 and the rear arm 160, which can swing up and down along the inner surface of the frame side plate 130, have the same rotation fulcrum 162. Supported by the frame side plate 130. Front arm 15
8 has an entrance-side roll 108A attached to the tip, and the rear arm 160 has an exit-side roll 108B attached. Each of the arms 158 and 160 has a frame side plate 1
The rod ends of the lifting / lowering cylinder mechanisms 164 and 166 installed in the apparatus 30 are connected. By lifting and driving the cylinder mechanisms 164 and 166, the respective distal ends of the arms 158 and 160 rise to open the transfer line surface. be able to. Further, a tension roll 168 is provided in the middle of the circulation route of the transport tape 108T so that the transport tape 108T is not loosened due to the elevation of the arms 158 and 160. In this example, drive roll 1
Tension roll 16 so as to be located directly above 08D.
8 and the drive roll 10 circumscribing the tape 108T.
Tape 108T so that the wrap angle around 8D is large.
The tension roll 168 is pulled by the air cylinder 170 while being in contact with the tension roll 168. The tension roll 168 is supported by a bent portion of a bell crank 172 attached to the frame side plate 130 so that the tension roll 168 can be pulled, and the bell crank 172 can be set to be rotatable. The air cylinder 1
70 allows the traction to be performed in the tension applying direction.

In such an upper high-speed tape means 108, a lift guide 148 is provided from the lower high-speed tape means 106.
The high-speed tapes 106T and 108T are transported at the same speed, so that the cut sheets do not overlap each other.
The sheets are moved one by one and can be sequentially poured and supplied above the stack section 112. The transport line formed by the lower high-speed tape unit 106 and the upper high-speed tape unit 108 is set so as to have a downward slope toward the downstream side. The part side can be poured.

Here, when the cut paper is supplied directly from the upper high-speed tape means 108 to the stack section 112, the leading end of the paper is damaged, so that the transport speed is reduced. Is transferred to the lower low-speed tape means 110. This is because the front end side of the cut paper sucked and conveyed at a high speed by the upper high-speed tape unit 108 flows into the upper part of the stack unit 112 by inertia.
Then, the trailing edge of the cut sheet in the sucked state is forcibly separated, and the trailing edge is delivered to the lower low-speed tape means 110. The cut sheet delivery means is constituted by a snapper roll 174, which is disposed immediately before the outlet roll 108B in the upper high-speed tape means 108 as shown in FIG.
It is formed by a brush that rotates using the gap between T. That is, a rotating shaft 176 parallel to the roll 108B is passed between the left and right rear arms 160 immediately before the outlet roll 108B, and the mounting block 178 is fixed to the rotating shaft 176. The mounting block 178 is constituted by a pair of rectangular block joints having a semicircular groove adapted to the rotating shaft 176, and is configured by attaching a separation brush 180 to an outer edge of one of the blocks. The separation brush 180 is obtained by implanting brush fibers 180B in almost half of a plate 180A attached to the block 178. The base of the brush fibers 180B precedes in the rotation direction (cut paper conveyance direction), and the fiber ends, that is, to the cut paper. Are oblique in the direction of the radius of rotation such that the contact tip thereof follows in the direction of rotation. The tip rotation trajectory of the separation brush 180 is determined by the upper high-speed tape
8, the projecting length is within a range in which the suction of the conveying tape 108T does not reach when the cut sheet is separated, and the protruding length is in contact with the conveying surface to the lower lower speed tape means 110. The dimensions may be set so that Not only the brush type but also a nail type can be used. Such a snapper roll 174
Is a pulley 176 attached to the base end of the rotating shaft 176
The separation brush 180 is brought into contact with the low-speed tape means 110 only once during one rotation, while rotating the P by rotating. This contact timing is determined by the high-speed tape
The leading end of the cut paper conveyed by
2 is sent to the top of
This is performed when the front end of zero is reached. The contact timing is adjusted so that the rotating shaft 17 is rotated at a predetermined speed in accordance with the transport speed of the high-speed tape means 108.
6 can be realized by adjusting the phase of the driving pulley 182 for driving the belt of the pulley 176P with the pulley 176P so that the timing described above is set. Actually, it is set so that the snapper roll 174 makes one rotation per rotation of the fly knife. In addition, snapper roll 174
The tip rotation trajectory projects from the front end of the vacuum box 150 toward the transport surface side, contacts the transport surface of the low-speed tape unit 110, and then is drawn in through the output roll 108B side. The part does not have a separating effect.

The lower low-speed tape means 110 for receiving the cut sheet by the action of the snapper roll 174 is disposed immediately before the stack section 112, and is provided with the upper high-speed tape means 10.
8 downstream area. This specific configuration is shown in FIG.
To 11. The lower low-speed tape means 110 has a single roll 110A arranged at the upstream end, and a pair of upper and lower small-diameter rolls 110B and 110C arranged at the discharge side and formed smaller than the diameter of the upstream end roll 110A. The transport tape 110T is wound around, and the upper small-diameter roll 110B is
The front end of the low-speed tape 110T is set to have a knife-edge shape closer to the entrance of the stack portion 112 than 0C. That is, the small diameter rolls 110B, 11B
0C have the same diameter, but are formed as rolls having a diameter of about 40% or less of the diameter of the upstream end roll 110A, and are arranged vertically in parallel at the discharge end. The upper and lower small-diameter rolls 110B and 110C are arranged so as to be shifted back and forth by an amount substantially equal to the roll diameter, and the upper small-diameter roll 110B is located at the upper edge of the rear jogger 112R that defines the accommodation area of the stack portion 112. The outer surface of the tape 110T wound around is set to match the inner surface of the rear jogger 112R,
The outer surface of the tape 110T wound around the upper small-diameter roll 110B faces the stack portion 112 so that no gap is formed between the tape portion 110T and the storage portion. The lower small-diameter roll 110C is arranged at a distance from the rear surface of the rear jogger 112R so as not to interfere with the transport tape 110T.

The cut sheet conveying surface of the lower low-speed tape means 110 is an upwardly outer surface of a plurality of conveying tapes 110T moving from the upstream end roll 110A toward the upper small-diameter roll 110B on the discharge end side. However, the pair of rolls 1 is so arranged that the transfer surface performs suction transfer.
A vacuum box 184 that forms a sliding surface of the tape 110T is provided between 10A and 110B. This vacuum box 184 is formed as a hollow container as in the case of the lower high-speed tape means 106, and a suction duct 186 provided at the lower part of the box is connected to a suction pump (not shown) so that the inside can be made in a negative pressure state. . A plurality of long holes 188 are opened in each tape sliding surface area of the vacuum box 184.
88 is covered by the back surface of the transport tape 110T. A plurality of suction holes 190 are opened over the entire length of each tape 110T. Thus, when the tape 110T slides on the sliding surface of the vacuum box 184, the negative pressure of the vacuum box 184 acts on the surface of the transport cut paper through the suction through hole 190, and the cut paper is suction-contacted to the tape 110T. It is sucked and transported together with the tape in this state.

The circulating drive of the transport tape 110T is performed by rotating the upstream end roll 110A. This is a belt drive system, as shown in FIG.
The roll pulley 192 is driven via a drive pulley 196 by a belt 194 wound therearound. A continuously variable transmission (not shown) is provided on the drive pulley 196 side.
Is provided so that the transport speed of the transport tape 110T can be adjusted arbitrarily. By this adjustment, the feeding speed of the low-speed transport surface to the stack portion is adjusted, and the overlap amount between cut sheets can be changed.

Incidentally, the rear jogger 112R for regulating the accommodation area of the stack portion 112 is attached to the vacuum box 184. That is, as shown in FIG. 11, the rear jogger 112R is formed by a strip-shaped plate hanging down from a gap between the plurality of transport tapes 110T, and the vacuum box 18R.
4 is attached to a bracket 191 fixed to the bracket 4. A vibrator 193 (see FIG. 1) is attached to a part 112R 'of the plurality of rear joggers 112R so as to vibrate a pile of cut sheets housed in the stack unit 112 to align the end faces. Rear jogger 11
The front surface of the 2R is, as described above, a transport tape 110T.
Are set so as to be on the same plane as the front edge of the front end.

The cut paper conveyed by the upper high-speed tape means 108 flows into the stack section 112 in a high-speed conveying state. However, immediately before the paper end of the cut paper comes out of the high-speed suction area, the lower low-speed tape means 110 is moved by the snapper roll 174. Handed over to As a result, the lower low-speed tape means 110 can suck and convey the trailing edge of the paper and convey the cut paper at a reduced speed. This lower speed tape means 11
0 is sent out to the stack unit 112, and the storage unit of the stack unit 112 includes a rear jogger 112R attached to the vacuum box 184 of the lower low-speed tape unit 110 and a front jogger arranged to face the rear jogger 112R. 112F defines the front and rear area, and the left and right areas are defined by the side joggers 112S attached to the left and right frame side plates 130. The stack unit 112 includes the jogger 112R,
It has a table 195 that moves up and down in the storage space surrounded by 112F and 112S, and the cut paper conveyed on the table 195 is piled.

The front jogger 112F and the side jogger 112S of the stack section 112 are also provided with a vibrator 198 so as to align the cut paper pile end faces.

Next, as shown in FIGS. 6 to 8, an air blow means 200 is provided above the accommodation space surrounded by the joggers 112R, 112F and 112S in the stack section 112. I have. The air blow means 200 has a plurality of blow pipes 202 having a length extending over the entire length of the stack portion 112 in the longitudinal direction along the extension direction of each tape 108T of the upper high-speed tape means 108. The duct 204 to be connected is connected to the manifold 206 passed between the frame side plates 130. Manifold 20
Air from an air supply source such as a blower (not shown) is introduced into 6, and is distributed and supplied evenly to the plurality of ducts 204 and supplied to each blow pipe 202. Blowpipe 202
As shown in FIG. 8, a large number of blowout holes 205 are formed on the lower surface of the cut paper. The cut paper conveyed at a high speed by the upper high-speed tape means 108 and subsequently conveyed at a low speed by the lower low-speed tape means 110 is formed on the lower surface. It is guided in the transport direction and sequentially laminated. The air blow means 200 is inclined in accordance with the transport surface of the upper high-speed tape means 108 so that the blow pipes 202 are arranged along the transport surface of the upper high-speed tape means 108. The incoming cut paper is slid in such a manner that the leading end side follows the pile surface while being introduced obliquely. By this air blowing action, the time required for the transport cut paper to be in a stable laminated state is reduced.

In the printing press sheeter constructed as described above, the cut paper cut to a predetermined size in the cutting section 104 is first introduced into the lower high-speed tape means 106, where the lower surface is sucked and the high-speed tape is cut. Conveyed at tape speed. A lift guide 148 is provided on the discharge end side of the lower high-speed tape unit 106, and the cut sheet being conveyed is guided by the lift guide 148 and introduced into the upper high-speed tape unit 108 side. Upper high-speed tape means 108
Also, the cut paper is in a suction state on the upper surface, and is also conveyed at a high tape speed. The discharge end of the upper high-speed tape means 108 is a stack 112
The snapper roll 174 provided in the vicinity of the entrance serves to move the cut sheet away from the conveyance surface when the sheet edge of the cut sheet reaches the front end of the suction area. For this reason, most of the cut paper is stacked 1
12 and the lower low-speed tape means 1
Handed over to 10. The lower low-speed tape means 110 sucks the trailing edge of the cut sheet delivered from the snapper roll 174 to perform a braking action, decelerates, and decelerates the stack section 11.
2 and stacked on the elevating table 195. An air blow means 200 is provided on the upper surface of the stack unit 112. The air from the air blow unit is blown out along the conveying surface of the cut paper fed into the stack unit, and the cut paper is fed to the stack unit at a low speed. Send out and laminate.

For this reason, in the printing press sheeter, most of the cut paper is sent to the stack unit 112 through high-speed conveyance by suctioning the lower surface and high-speed conveyance by suctioning the upper surface. In addition to sucking and transporting only the bottom of the cut sheet, the air is blown onto the upper surface of the cut sheet, which is introduced into the stack section 112 at a high speed and then reduced at a low speed. The time required for stable adhesion to the preceding pile surface can be greatly reduced, and the low-speed transport distance by the low-speed transport tape unit 110 can be reduced. As a result, the effect of shortening the piling time is high, and the low-speed transport region is short, so that the overall length of the theta can be shortened. The delivery of the cut sheet from the low-speed transport tape unit 110 to the stack unit 112 is performed by the snapper roll 174. Since this is the delivery of the paper tail, the low-speed transport tape unit 110 and the stack unit 1 are transferred.
Paper jam does not occur due to, for example, the leading end of the cut sheet being caught at the joint portion with the sheet 12.

[0035]

As described above, the sheeter for a printing press according to the present invention enables the transfer of cut sheets from the lower high-speed tape means to the upper high-speed tape means and from the upper high-speed tape means to the lower low-speed tape means. A suction means is attached to the upper high-speed tape means and the lower low-speed tape means, and a transfer means from the upper high-speed tape to the lower low-speed tape is formed by a snapper that periodically contacts a conveying surface of the lower low-speed tape means. The bottom edge of the cut sheet transported by the upper high-speed tape by the snapper and reaching the upper portion of the stack portion can be pressed against the low-speed tape, and covers the upper surface portion of the stack portion following the transport surface of the upper high-speed tape means. An air blow section is provided, and the air from this air blow section is fed along the conveying surface of the cut sheet fed to the stack section. The cutting paper is sent to the stacking section at low speed while being blown out and laminated, so that the processing time from cutting of the print web to piling is stable, especially the cut paper introduced and supplied to the upper surface of the stacking section. It is possible to improve the processing efficiency in a short time until the process is performed.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an outline of a printing press theta according to an embodiment.

FIG. 2 is a side view of a lower transport tape unit.

FIG. 3 is a partial plan view of the same.

FIG. 4 is an upstream side view of the upper high-speed tape means.

FIG. 5 is a partial plan view of the same.

FIG. 6 is a side view of the air blow means on the downstream side of the upper high-speed tape means and the upper part of the stack section.

FIG. 7 is a partial plan view of the same.

FIG. 8 is a side view, a bottom view, and a partially enlarged sectional view of the air blow pipe.

FIG. 9 is a side view of a downstream portion of the lower high-speed tape means and the upper high-speed tape means.

FIG. 10 is a partial plan view of the lower low speed tape means.

FIG. 11 is a downstream end view and a partial side view of the lower low-speed tape means.

FIG. 12 is a configuration diagram of a conventional theta.

[Explanation of symbols]

 100 theta 102 print web 104 cut section 106 lower high-speed tape means 106A inlet roll 106B outlet roll 106C tension roll 106T transport tape 108 upper high-speed tape means 108A inlet roll 108B outlet roll 108C intermediate roll 108D drive roll 108T transport tape 108DP Pulley 110 Lower low-speed tape means 110A Upper end roll 110B Upper small diameter roll 110C Lower small diameter roll 110T Transport tape 112 Stack section 112F Front jogger 112R Rear jogger 112R 'Rear jogger 112S Side jogger 114 Draw roll 116 Press roll 118 Fly knife 120 Fixed knife 128 Roll pulley 130 Frame side plate 132 Drive pulley 134 Reverse 136 Intermediate pulley 138 Belt drive 140 Vacuum box 142 Suction duct 144 Long hole 146 Suction through hole 147 Nip roll 148 Lift guide 150 Vacuum box 152 Suction duct 154 Long hole 156 Suction through hole 158 Front arm 160 Rear arm 162 Rotating fulcrum 164 Front lifting cylinder mechanism 166 Rear lifting cylinder mechanism 168 Tension roll 170 Air cylinder 172 Bell crank 174 Snapper roll 176 Rotating shaft 176P Pulley 178 Mounting block 180 Separation brush 180A Plate 180B Brush fiber 182 Drive pulley 184 Vacuum box 186 Suction duct 188 Slot Suction through hole 191 Bracket 192 Roll pulley 193 Vibration Motor 194 belt 195 lifting table 196 driven pulley 200 air blow means 202 blowpipe 204 duct 205 air outlet 206 manifolds

Claims (1)

(57) [Claims] 1. A lower high-speed tape and a lower low-speed tape are arranged in tandem along a conveying direction on an exit side from a cutting section for cutting a web into sheets, and an upper high-speed tape is arranged along an upper surface of a cut sheet to be conveyed. In a sheeter for a printing press, wherein a tape is disposed and a stack of cut sheets is provided on the discharge end side of the lower low-speed tape, the lower high-speed tape means to the upper high-speed tape means and the upper high-speed tape means to the lower low-speed tape means. A suction means for sucking the transport paper along the transport surface of at least the upper high-speed tape means and the lower low-speed tape means, and periodically transferring the transfer means from the upper high-speed tape to the lower low-speed tape; Formed by a snapper that comes into contact with the conveying surface of the lower low-speed tape means. Paper buttocks cut sheet has reached the top of the click portion to allow the hold-down to the low-speed tape, and provided with air blow portion that following the conveying surface covering the upper surface of the stack portion of the upper high-speed tape unit,
A sheeter for a printing press, wherein cut sheets are sent out to the stack section at a low speed and stacked while blowing air from the air blow section along the conveying surface of the cut sheet fed into the stack section.