JPS605471B2 - Method and device for registering sheets in a printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a first sheet of a group of sheets that is fed in a stacked manner on a paper feed table having a side gauge side pad and a front gauge front pad. The present invention relates to a method and apparatus for registering leading and side edges of.

Such devices are already known.

Problems in this case include bouncing effects on the front gauge when the sheet speed is high and the paper is thin, and the effects of slow, fast, or It is an irregularity in the flow of stacked sheets of paper that is skewed. Therefore, catch hooks are known which receive the leading edge of a sheet in front of the front gauge, preregister it and feed it at a reduced speed to the front gauge. The disadvantage in this case is that there is still a rebound effect and only a short registration time is left for the side tension gauges. In another known printing press,
In order to reduce the rebound effect in the front gauge, a reduction gear is provided which periodically speeds up or slows down the conveyor belt and thus the overall sheet flow.

In this case, the slow speed is achieved at the moment each sheet hits the front gauge. However, in this case, at high speeds, there is soot that the sheets slip relative to the conveyor belt and do not reach the front gauge at the correct time. Furthermore, it has already been proposed to stack sheets of Aoi paper in a scale-like manner with small overlaps and run them into the front gauge at a speed of 4.5 seconds.

In this case, to avoid contact with the side gauge,
The sheet stream, which is scaled with small overlaps, is shifted laterally so that it passes outside the range of the side gauges. The action of at least two Aoi paper conveying devices, which are rotatably supported about an axis perpendicular to the plane of the Aoi paper and which act with suction air on the underside of each Aoi paper sheet, is to grasp each Aoi paper sheet. The purpose is to simultaneously bring the arc onto the working range of the front gauge and the working range of the side gauge. 260437y, UK Patent No. 1021118). In these devices, which are known in different constructions, the sheets are held in a front gauge and a side gauge with suction air that allows sliding, or the sheets are held in a side tension gauge. As soon as the tension of the side support is reached, the feeler immediately shuts off the suction air. In this case, the sheet of straw paper that runs in is not pre-registered and is sometimes forced into the front gauge by the suction device guided in an arc, so that the front green sheet of straw paper is damaged. , correct registration is not guaranteed. A further disadvantage here is that sheets fed at high speeds are deflected laterally at the same speed. This results in problems with the side gauges. Furthermore, even though a freely rotatable reciprocating suction device is used, the frictional force is large, and the thin paper cannot be prevented from rotating without distorting the suction device. (West German Patent Application Publication No. 251822). The object of the invention is to provide a method and a device for precisely registering speed scales and sheets, which does not have the above-mentioned disadvantages.

This object was achieved according to the invention by the method according to claim 1 and the device according to claim 4.

Advantageously, the front gauge and the feed cylinder are arranged below the feed table.

According to one embodiment of the invention, the auxiliary front gauge, the main front gauge and the feed cylinder are combined in a special way. The paper feeder 8 consists of a stopper located under the paper feeder table, and this stopper cylinder has two rows of gripper mechanisms,
It holds two sets of main front gauges, and is designed to make half a rotation per sheet of Aoi paper. The auxiliary front gauge is located approximately five feet in front of the rest position of the stop cylinder, and the stop cylinder, together with the open gripper and the main front gauge, contacts the bottom of the sheet located in the auxiliary front gauge. It is now possible to pass through without any trouble. The principle of movement of the stop cylinder is selected on the one hand in such a way that for low acceleration values as long as possible starting and braking angles are obtained. On the other hand, sufficient time must be allowed for registration by the main front gauge and side tension gauges. What is particularly effective is to divide the time into three equal parts, that is, the starting time until the sheet of millet is delivered is about 120°, the braking time is about 1200°, and the resting time is about 1°.
The temperature should be 20o. Further, according to another embodiment of the invention, the auxiliary front gauge, the main front gauge, and the stop lug are located below the feed table, and are between the rest positions of the auxiliary front gauge and the stop lug. The leading edge of the stationary paper feed table is omitted.

Conventionally, this leading edge has been constructed in the form of a comb to provide space for the gripper and the gripper seat. In this case, there is a disadvantage that if the paper is thin, the paper will sag at the comb-shaped notches, making registration difficult. In accordance with the invention, one strip is assigned to each of the two gripper mechanisms of the stop 8, which strip serves as a guide between the feed table and the stop cylinder when the stop cylinder is in its rest position. It is configured to act as a filler. In this way, a flat feed table is achieved in which it is sufficient to have a very short recess for the receiving gripper behind the stop cylinder.
The conveyance of the preregistered paper sheets from the auxiliary front gage to the main front gage is carried out by means of a paper feed table and a side tension gage located under the feed table and in front of the auxiliary front gage, viewed in the direction of sheet travel. , by at least two reciprocating suction conveying members movable up to the main front gauge. This suction conveyance member conveys the sheet of paper in a flat quadrilateral shape in the running direction of approximately 5 pieces of paper, and then conveys the sheet of paper in a flat quadrilateral shape.
5 Transport toward the skin side gauge. After being displaced laterally in this manner, the sheet is positioned in the working range of a typical side tension gauge. Advantageously, the forward feed stroke of the suction conveyor corresponds to the distance from the auxiliary front gauge to the main front gauge. This causes the sheet to reach the main front gauge with zero velocity,
Bounce of sheet paper is now completely avoided. The invention will now be explained with reference to the drawings.

As can be seen in FIG. 1, the feed table consists of a stationary feed table part 1 and a front feed table part 3 which is connected form-fittingly to a stationary cylinder shaft 2.

The front paper feed table part 3 has an L-shaped gripper attachment part (
Serves as a gripper L-shaped member 36). A main front gauge 4 is arranged in this front vertical paper table portion 3. The grippers 5, 19, which are controlled in a known manner on the stop eye 16, are of solid construction and also serve as pressure gauges 6. The stationary feed table part 1 is followed by a periodically controlled auxiliary front gauge 7 which can be submerged below the table plane. This auxiliary front gauge 7 is connected to the tip 39 of the presser gauge 6 and the main front gauge 4.
It is spaced apart from the stop cylinder 16 so that it can pass under the leading edge of the sheet of paper applied to the auxiliary front gauge 7 at the end of the stationary paper feed table section 1 without touching it. positioned. At least two controlled sheet suction and transport elements 8 are placed in front of the auxiliary front gauge 7 in the direction of sheet travel. This sheet suction member 8 suctions the sheet 9 placed against the auxiliary front gauge 7 at the SO position, conveys it a distance of SO-SI, and delivers it to the main front gauge 4 at the SI position. A movable pressure gauge roller 10 and a stationary pressure gauge roller 11 keep the millet paper 9 flat. The sheet suction conveyance member 8 reciprocates at an angle with respect to the side edge 32 of the sheet feeding table 1. Therefore, the straw paper suction member 8 not only transports each straw paper 9 from the SM standing calendar to the SI position, but also simultaneously transports it to the side S2 position (FIG. 4). Advantageously, the distance a between the auxiliary front gauge 7 and the main front gauge 4 is 5 mm. After the sheet 9 is registered in the auxiliary front gauge 7, it is conveyed forward toward the main front gauge 4 by the suction conveyor member 8, and at the same time, the paper sheet 9 is conveyed forward toward the main front gauge 4 by the suction conveyor member 8. transported towards.

After this, main registration with respect to the main front gauge 4 is performed, and side edge registration is performed with the side tension gauges. After registration is completed, the gripper 5 of the gripper mechanism 17 is closed and the stopper mechanism 16 is rotated. In this case, the gripper teaching L-shaped member 36 (
The paper feed table section 3) lifts the sheet 9 from the paper feed table section 1 even though the stop 8 can only be moved about one ship's length. Therefore, the auxiliary front gauge is
It can be protruded onto the plane of the paper feed table very quickly without damaging it. Immediately after this, the next sheet 12 already enters the auxiliary front gauge 7, so that a very long registration time is given to the sheet. FIG. 2 shows the state immediately after the stop cylinder 16 is started.

Oke Ribfu. The sheet gauge 7 is substantially closed and the next sheet 12 is positioned immediately in front of it. The sheet adsorption member 8 is
As soon as the gripper 5 of the stop cylinder 16 passes the leading edge of the sheet 12, as shown in FIG.
The robot is returning to its starting position in order to transport it diagonally forward.
Sheet 9 is being withdrawn from feed table section 1;
The presser gauge roller 10 has some special features.
FIG. 3 shows the stop cylinder 16 just before reaching the rest position R.

The sheet 12 has undergone preliminary registration and has already been suctioned by the sheet suction conveyor village 8 at the position SO.
The auxiliary front gauge 7 has already been opened somewhat. The gripper L-shaped member 36 has not yet activated its function as a filling member of the paper feed table, and the grippers 5, 19 are in the front of the sheet 12. It has just passed under the edge without touching it.Since the side tension gauge 13 pulls the sheet of millet paper after reaching the main front gauge 4, it is very important for preliminary registration at the auxiliary front gauge 7. A long period of time is provided, thus ensuring that early and late sheets as well as skewed sheets of paper are evened out and fed at the correct periodicity.
It is drawn from. This is possible because the stop cylinder 16 and the front gauges 4, 7 are arranged in such a way that they are brought into their working position from below, rather than from above, the feed table 1. In FIG. 4, which is a top view of the paper feed table 1, a stop 16 is shown having a gripper mounting L-shaped member 36, a gripper 5 and a main front gauge 4. As shown in FIG.

The auxiliary front gauge 7 is located approximately five feet behind the rest position R of the main front gauge 4. A reciprocating sheet suction conveyance member 8 moves each sheet to an auxiliary front gauge 7.
At the same time, it is transported laterally toward the side tension gauge 13. For this purpose, the paper sheet suction and conveyance member 8 is rotatably supported on the paper table section 1, and the running direction of the paper sheet is set at a second side tension gauge 42 facing the first side tension gauge 13. It is now possible to switch towards. The sheets of hollyhock paper 9, 12, etc. piled up like scales are sent toward the auxiliary front gauge outside the range of the side pull gauge.

The sheet 9 is conveyed in a parallelogram shape to the action range of the side tension gauge 13 or 42 using the sheet suction conveyance member 8, and the gripper 5 at the stop 8 or 16 closes to remove the sheet. Before being conveyed into the machine, it is pulled into the S2 position by the side tension gauge 13 or 42. The side tension gauge 13 or 42 is set even though the following sheet of paper 12 has already exceeded the side tension gauge line.
It is possible to pull only the sheet of Aoi paper 9. This is because the sheet 12 is located outside the action range of the side tension gauge 13 or 42, and after being stopped at the auxiliary front gauge 7, the sheet suction conveyance section village 8' This is because the side tension gauge 13 or 42 is thus affected by the parallelogram movement. A general conveyor belt 15 in a picture paper table slowly conveys sheets of straw paper 9, 12 piled up in scales at a small interval in the direction of the arrow. The end rollers 14 hold the frontmost sheet 9 on the auxiliary front gauge 7. In FIG. 5, the sheet suction and conveyance member 8 is shown.

The sheet suction transport section 8 consists of a suction body 29 that slides in a guide 31 on the sheet feed table 1. Suction air is supplied to this adsorbent 29 via a hose 30. The guides 31 extend parallel to each other and are inclined at an angle Q in the horizontal direction with respect to the side edges of the paper feed table 1. The drive of the Aoi paper suction conveyance member is carried out by a ball joint and a connecting rod 33.
A crankshaft 3 that can be reciprocated by a control cam via
It is done by 4. Adsorption conveyance member 8 sliding on the guide
It is also possible to use other suction conveying elements with technical equivalence instead.

For example, it is also possible to use a suction drum that is pivoted about a straight line at right angles to the axis of rotation. A device for periodically supplying suction air to a suction drum and for laterally displacing the suction drum is known, for example, from DE 23 30 844 A1. Furthermore, a known suction belt tilted at an angle Q with respect to the side edge 32 may be used to convey the sheet of paper. In this case, the suction belt is periodically loaded with suction air. 6th
In the figure, a transmission is shown which provides the desired movement of the stop cylinder 16.

The one-rotation cylinder 20 driven by the main drive device drives a half-rotation shaft 41 via gear devices 21 and 22. In this case, the gear wheel 22 carries two drive rollers 23, 24 offset by 1800 degrees as drive discs. This drive. -Ra 2 and 24 are Martak divided into six parts. Collaborate with 25 people. This Maltese cross 25 moves at a pitch of 600. There is also a half-rotation shaft in the center of this Maltese cross 25. The Maltese Cross 25 has a gear unit 2 with a transmission ratio of 3:1.
6 and 27 are combined. This gearing converts the 600° pitch motion of the Maltese cross 25 into a stopped and coaxial 180° pitch motion. In this case, the stop barrel 16 is 90
Since the maximum speed is reached after 0 rotations, the sheet also moves 90 degrees above the stopped Tsukioka 16 from the rest position in the paper feeding tape loop until the sheet is delivered to the same 20 rotation. I am forced to do it. The stop barrel 16 is 2 times the diameter of the one rotation barrel 20.
/3, the circumferential velocities of the stop drum 16 and the rotational cylinder 20 are equal at the moment the sheet is transferred (poor-3-good=n). The starting angle, braking angle and resting angle of the multi-axis q and the stop cylinder are 60o for the half-rotation axis or 120o for the one-rotation axis 40. That is, an extremely large amount of time is provided for gentle acceleration and deceleration of the stop cylinder 16. A controlled locking pawl 35 ensures a 1200 length rest of the stop cylinder 16 and the Maltese cross 25. The stop cylinder 16 has two rows of gripper mechanisms 17, 18 with grippers 5 and 19. This gripper mechanism 17,
18 work alternately. Furthermore, without changing the starting angle, braking angle, and resting angle (= time), if fewer or more gripper mechanisms than two rows are desired on the stop barrel 16, between the Maltese cross 25 and the stop barrel 16. By changing the transmission ratio of the transmission, the transmission can be easily adapted to different geometries.

Furthermore, if properly designed, instead of rotating the drive disc 22 and the Maltese cross 25 together with their associated gears on an auxiliary pin, it would be possible to rotate the one-turn cylinder 20 and the stop 8 on the same pin. You can also do it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the stop cylinder in the rest position, Fig. 2 is a view showing the stop cylinder immediately after starting, and Fig. 3 is a view showing the stop cylinder immediately after stopping. and a diagram showing the same,
Figure 4 is a view of the paper feed table from above, excluding the Aoi paper.
FIG. 5 is a longitudinal sectional view of the sheet suction member, and FIG. 6 is a diagram showing the transmission device for moving the stop 8. 1...Paper feed table, 2...Stop Tsukioka shaft, 3...
Paper feed table part, 4...Main front gauge, 5...
・Gripper, 6... Holder gauge, 7... Auxiliary front gauge, 8... Sheet paper suction conveyance member, 9... Sheet paper, 10... Holder gauge roller, 11... Holder gauge Roller, 12... Sheet, 13... Side tension gauge, 1... End roller, 15... Conveyor belt, 16... Stop cylinder, 17... Gripper mechanism, 18...
...Gripper mechanism, 19...Gripper, 20...1
Rotating cylinder, 21...gear, 22...gear, 23...
Drive roller, 24... Drive roller, 25... Maltese cross, 26... Gear, 27... Gear, 29...
Adsorbent, 30... Hose, 31... Guide, 32...
・Side edge, 33...Connection rod, 34...Crankshaft, 35・
...Latching claw, 36...Gripper teaching attachment L-shaped member, 37
...Gripper battle uniform L-shaped member, 38...Tip, 39
...Gripper tip, 40...1 rotation axis, 41...half rotation axis, 42...side tension gauge. Line 9, B F. 2 F. 3 F. Mu phrase・9.5 line・9.6

Claims (1)

[Scope of Claims] 1. A method for registering the front edge and side edge of the first sheet 9 of a group of sheets that are fed in a stacked manner on a sheet feed table of a sheet-fed rotary printing press. First, the sheet 9 is preregistered and brought to rest by means of an auxiliary front gauge 7 on the feed table, and then the sheet 9 is moved from this rest to a main drum mounted on a drum configured as a stop cylinder 16. It is characterized in that, at the same time as the sheet conveying member 8 is moved toward the front gauge 4, the sheet is also moved within the action range of the side gauges 13, 42 by pulling the sheet in order to register the side edges of the sheet. A method of registering sheets of paper on a printing press. 2. The registration of the side edges of the sheets 9 is carried out during the rest time of the stop cylinder 16, and the preliminary registration of the leading edge of the sheets 9 in the auxiliary front gauge is carried out during the movement time of the stop cylinder 16; A method according to claim 1. 3. A device for registering the front edge and side edge of the first sheet of a group of sheets that are stacked and fed in a scale-like manner on the paper feed table of a sheet-fed rotary printing press, which The main front gauge is arranged on the drum at a distance from the auxiliary front gauge, and has an auxiliary front gauge that can be pivoted downward and a tension side gauge, which is mounted on the drum and is attached to the sheet to be conveyed. In those versions in which the sheet transport member acting from the front is arranged between the auxiliary front gauge and the main front gauge, the drum is used as a stop cylinder 16 with two gripper rows 17, 18 of controllable grippers. It is configured, and on top of the stop cylinder 16,
Device for registering sheets in a printing press, characterized in that strips 36, 37 are installed which act as filling elements between the feed table 1 and the stop cylinder 16. 4 As a sheet conveying member that acts from below on the sheet to be conveyed, it simultaneously conveys the sheet 9 towards the main front gauge in the conveying path between the auxiliary front gauge 7 and the main front gauge 4. Tension side gauge 13,4
4. The device as claimed in claim 3, further comprising a sheet transport member for transporting two working areas. 5 At least two suction bodies 29 are arranged as sheet transport members, which can be moved back and forth in guides on the feed table 1 and can be periodically loaded with suction air, the guides 31 being 4. The device according to claim 3, wherein the device is inclined at an angle α with respect to one side edge 32. 6. The device as claimed in claim 3, wherein a suction drum is arranged as the sheet transport member, which rotates and can be moved back and forth along the axis of rotation and which can be periodically loaded with suction air. 7. A suction drum, which can be periodically loaded with suction air as a sheet transport member, is provided, the suction drum being able to pivot about an axis that is perpendicular to its axis of rotation and the plane of the feed table. 4. The device according to claim 3, wherein the device is arranged in a. 8 A suction band, which can be periodically loaded with suction air, is arranged as a sheet transport member, the suction band being inclined in the horizontal plane at an angle α with respect to the side edge 32. The device according to item 3. 9. Device according to claim 3, in which the stop cylinder 16 is arranged below the paper feed table 1. 10 A transmission is arranged to drive the stop cylinder 16, which drives the stop cylinder during a rest time of 1/3 of the sheet cycle, an acceleration time of 1/3 of the sheet cycle, and a sheet cycle. Claim 3, which is driven with a braking time of 1/3 of the paper cycle.
Apparatus described in section. 11 Gripper rows 17, 18 shifted 180° from each other
A Maltese cross 25 divided into six parts is arranged to drive the stop cylinder 16 that holds the main body.
2 is arranged, the drive disk 22 having drive rollers 23, 24 offset by 180°, and a gearing 26 with a transmission ratio of 3:1 between the Maltese cross 25 and the stop cylinder. , 27 are connected to the device according to claim 3. 12 The diameter of the stop barrel 16 is 2/3 of the diameter of the one rotation barrel 20
12. Device according to claim 11, characterized in that a controlled locking pawl (35) is arranged to hold the stop cylinder (16) during the rest period. 13 The strips 36, 37 of the main front gauge 4 form an extension of the feed table 1 in the locking position R of the stop cylinder, with said strips 36, 37 at the outermost tip at most drawing the tip of the gripper. 4. A device according to claim 3, which is located on a circle so that it can pass by the auxiliary front gauge 7 without colliding with it.