JP2507703B2 - Method and device for accelerating a sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention aligns the front edge and side edge of a sheet fed in a scaly form and moves it from a stationary position on a sheet feeding table. , A method for accelerating and feeding the impression cylinder peripheral speed of a sheet-fed printing press and an apparatus for carrying out this method.

[Prior Art] German Patent No. 23
In the known device according to the specification of the 30484 specification, a sheet pre-aligned with a front gauge and a side gauge is arranged below a paper feed table in order to slightly accelerate and feed it to the main front gauge of the gripper cylinder. Suction rollers are used that are periodically stopped and then accelerated. This suction roller is movable in the axial direction,
This makes it possible to shift the sheets laterally based on the side edge alignment.

This type of sheet feeding works very well up to a speed of 18,000 sheets / hour for small size sheets of about 50 × 70 cm, but for large size sheets, In machines with correspondingly large diameter cylinders and thus with limited high peripheral speeds, it is difficult to supply suction air for the sheets. In particular, for smooth and heavy paper or thick paper, a slip occurs between the suction feeding device and the sheet, and this slip gradually increases as the sheet feeding speed increases, and the sheet becomes the main front gauge. There is a risk that the sheets will not be aligned correctly because the timing of feeding them to the gripping cylinder provided with is delayed. For this reason, 50 x 70 cm sheet
It is difficult to supply at a high speed of 20,000 sheets / hour or more.

According to German Patent DE 617107, a two-stage sheet-accelerating device for a sheet-fed rotary printing press is known. In this known sheet accelerating device, the sheets are aligned on their leading edge and on both side edges on a sheet feeding table (paper feeding table) and then rested by a first sheet feeding means. To an intermediate speed and then grasped by a gripper of a second sheet feeding means which circulates at the intermediate speed and selectively accelerates to a speed equal to, greater than or less than the peripheral speed of the impression cylinder. It is supposed to be done. The first and / or second sheet feeding means are provided with alignment means for aligning the leading edge or the side edge of the sheet. The sheets are then handed over to the gripper of the impression cylinder by the second sheet feeding means.
By such a two-stage sheet acceleration, a large acceleration force and wear of the relevant portion can be avoided.

DE-A 20 460 602 discloses a device for feeding and aligning sheets in a printing press, which has one sheet accelerating device without side gauges. There is. In this known device, an electronic measuring head is provided instead of the side gauge. This measuring head measures the deviation of each sheet side edge with respect to the desired value and adjusts the corresponding axial deviation of the front gripping drum with the sheet or the intermediate gripping drum via the adjusting member. It has become.

[Problems to be Solved by the Invention] An object of the present invention is to provide a sheet-fed rotary printing press at relatively high speed (15,000 sheets / hour and more) even for relatively large sheets (> 50 cm × 70 cm). ) To provide such a method that can be delivered and an apparatus for performing this method.

[Means for Solving the Problem] According to the method for solving the problem according to the present invention, the first sheet accelerating device catches the sheet to be fed by the first gripper device. From the stationary state, the peripheral speed of the impression cylinder is accelerated to a speed equal to or lower than the impression cylinder peripheral speed, and then the sheet is caught by the gripper device of the second sheet acceleration device to accelerate the second sheet acceleration. A method for accelerating a peripheral speed of a first sheet accelerating device to a speed equal to or higher than an impression cylinder peripheral speed by a device, during a sheet accelerating phase in a second sheet accelerating device. To the second
The sheets are displaced by a predetermined distance in the axial direction of the sheet accelerating device.

Further, according to the means of the apparatus of the present invention for solving the above-mentioned problems, a sheet feeding table, a front gauge, a first sheet accelerating device having a gripper device, and an alignment drum having a row of grippers. A second sheet-accelerating device cooperating with the first sheet-accelerating device, which is drivable from a stationary state to a partial peripheral speed of the impression cylinder, The sheet accelerator is of a type that can be driven from a partial peripheral speed of the impression cylinder to a speed equal to or higher than the peripheral speed of the impression cylinder. It is configured to be axially movable during the sheet feeding movement.

[Advantages] The advantages obtained by the method and apparatus according to the present invention are as follows.
15,0 even for large sheets, heavy and heavy paper
The point is that a production speed of over 00 sheets / hour can be obtained. It is also possible to avoid feeding the leading edge of the sheet behind the front gauge of the drum even at maximum machine speed. Since the slip between the transport means and the sheet that is difficult to accelerate is kept within a certain limit, the speed difference between the front gauge and the sheet to be accelerated is kept small, The paper sheets can be delivered well toward the front gauge. Moreover, according to the invention, all problematic sheet feeding members, such as front gauges, suction rollers, suction roller transmissions, for sheet-fed rotary printing presses for processing sheets of different sizes. Others can be used as is for rationalization. The sheet insertion work is always the same at the same maximum speed in the first acceleration stage, eg 2.8 m / sec (eg plate cylinder diameter 180 mm
If it is, it corresponds to 18,000 sheets / hour. ) Can be done. If, for example, the printing press is equipped with a plate cylinder with a diameter of 300 mm when processing large-sized sheets, the speed in the second acceleration stage is from the peripheral speed of the plate cylinder with a diameter of 180 mm to the diameter of 300 mm.
Accelerated to the peripheral speed of the plate cylinder of mm. That is, 5/3 times or 4.7
Accelerated to m / sec. The second acceleration stage offers the advantage that the sheet is not passed directly by the suction roller to the impression cylinder or the front gauge and gripper at the speed level of this impression cylinder.

The invention provides a reliable suction roller supply within the slip limits due to the first acceleration stage for handing over to the gripper cylinder, even at maximum machine speed, and then the sheet to the second.
It is based on the idea of accelerating to a higher peripheral velocity of the impression cylinder in the acceleration stage of. A drum is used for this second acceleration stage. This drum is provided as an aligning drum with a gripper having a cover gauge action for delivering sheets in a known manner and a front gauge.
The alignment drum rotates periodically at a variable speed. The alignment drum is accelerated at a slow speed as each sheet reaches its front gauge, and at a higher impression cylinder peripheral speed as the sheet is delivered by about half a turn. Depending on the direction of rotation of the impression cylinder, the alignment drum delivers the sheet in its high-speed range of rotation either directly to the impression cylinder or to an intervening delivery cylinder. In the case of an intervening transfer cylinder, this transfer cylinder carries out the second acceleration stage action, whereas the alignment drum rotates constantly at a slower speed. It is advantageous to use the alignment drum as the second acceleration drum. This is because in this way the aligning drum has a larger diameter, which is convenient for processing cardboard.

[Embodiment] Next, the configuration of the present invention will be specifically described with reference to the embodiment shown in the drawings.

In FIG. 1, the sheet 1 fed in the form of a scale is brought from a sheet feed table 2 (paper feed table) to a side gauge configured as an auxiliary front gauge 3 and a pull-in guide 4. The fed sheets are first pre-aligned with the auxiliary front gauge 3 and then statically gripped by the suction air and then gradually accelerated so that the leading edge of each sheet is fed with the main front gauge 8. Eventually they will be lined up. In other words, below the sheet supply table 2 there is a set of rotating cylindrical suction rollers 5 (first sheet accelerating device). Each of the suction rollers 5 grips the sheet fed toward the auxiliary front gauge 3 and the pull-in guide 4 by the suction air in a stationary state and then accelerates the sheet. The leading edge of each sheet is then pushed below the gripper 6 of the alignment drum 7, at which point the sheet feed rate is greater than the rotational speed of the alignment drum 7, so the main front gauge 8 It is struck and aligned here. Then the gripper 6 is closed.
In this sheet aligning operation stage, the aligning drum 7 rotates at a slow speed Vmin. It is because of the spur gear 18 arranged eccentrically with respect to the alignment drum 7,
This is because the connecting link block 22 is arranged within the smallest radius of the rotating connecting rod 21 having the groove. When the alignment drum 7 rotates about half a turn, the peripheral speed Vmax. Of the transfer drum 11 for transferring the sheet to the gripper 12 in the range S is reached.
(= Circumferential velocity of the impression cylinder 13) is obtained. The transfer drum 11 transfers the sheet 1 to the impression cylinder 13 later. Here, the original printing process is started. However, the transfer cylinder 11 may be configured in advance as an impression cylinder for back side printing, which is sometimes performed by a blanket cylinder and a plate cylinder.

FIG. 2 is a graphical representation of the paper feed time ratio, which is possible according to the invention, for sheets of 720 mm in length, which are arranged in a scale, for example, with a spacing of 250 mm each.
The vertical axis (ordinate) indicates the sheet conveying distance when the auxiliary front gauge 3 is 0 mm, and the horizontal axis (abscissa) indicates the time angle of the sheet. In this case, the time angle is a cylinder that rotates exactly 360 ° for each sheet (eg, the transfer drum 1).
Corresponds to the rotation angle of. It is a variable that is independent of speed and is associated with this angle of time for all switching and movement processes of the printing press. Then, as the starting point for starting the calculation, that is, 0 °, the movement starting point of the twelfth sheet pre-aligned by the auxiliary front gauge 3 is selected. Therefore, at the start of the second sheet movement, the time angle is 360 °, and this time angle 360 ° corresponds to one cycle of the sheet feeding movement. The first acceleration stage is
When the time angle of the sheet feeding motion (= acceleration axis) has passed 140 °, the leading edge of the sheet hits the main front gauge 8 of the alignment drum 7 and ends. The second acceleration stage takes place on the alignment drum 7 at a time angle of 140 ° to 320 °. The trailing edge of the 720 mm long sheet 1 is approximately
Since they overlap by 40 °, the sheet feeding by the suction roller 5 and the sheet leading edge alignment in the auxiliary front gauge 3 must be performed from below the paper feeding table 2 (see German Patent No. 2330484). ). For this reason, the pull-in guide 4 (side edge pulling device), which is arranged at a distance of minus 150 mm from the front side of the auxiliary front gauge 3, is always covered by the traveling sheet 1, and it is necessary to take special measures. The pull-in guide 4 is constructed as a known suction-type pull-in guide which acts on the sheet from below, or alternatively the running sheet 1 is known in order to give the pull-in guide 4 a working space. It is designed to be shifted laterally. In this way, the sheet 1 is laterally displaced by slightly shifting the suction roller 5 or the alignment drum 7 or the suction roller 5 and the alignment drum together sideways (for example, 25 mm) when the sheet is supplied. Done by During the pulling process, the pulling guide 4 is not reached by the next and subsequent sheets,
The spacing between the scales of the sheet is set to 250 mm. By reducing the feed rate of the scaled sheets (shown in broken lines), the rate at which the sheets strike the auxiliary front gauge 3 is reduced and the alignment time is extended.

In the graph of the embodiment shown in FIG. 3 in which the paper feeding time ratio is changed from that in FIG. 2, the very narrow interval between the sheets arranged in a scale is, for example, 150 mm. This spacing is particularly advantageous for feeding sheets at maximum speed, as the risk of splashing on the auxiliary front gauge 3 is reduced. In the embodiment of FIG. 3, the pull-in guide 4 is obstructed by passing sheets and by subsequent sheets when using the two-stage sheet acceleration method according to the invention.

The solution in this case is to use a suction-type retracting guide 4 which shifts the passing sheet 1 slightly (25 mm) in relation to the embodiment of FIG. 2 and acts from above.
In this case, the sheet shifting operation is carried out by periodically shifting the sheet feeding member laterally in the first or second acceleration stage or in both acceleration stages.

If the conventional pull-in guide or suction pull-in guide is to be omitted altogether, the two-stage sheet-accelerating method according to the invention with a suction-air feeding device in the first stage may be used. In this case, by means of an electronic measuring head, each sheet 1 is recorded and stored when it comes into contact with the auxiliary front gauge 3. Then sheet 1
Is slightly displaced laterally by a predetermined target value by axially moving the suction roller 5 and / or the aligning drum 7 by means of an electronic or hydraulic medium before it is transferred to the gripper of the impression cylinder 13. . This cyclically controlled lateral movement is caused by the axis of the suction roller 5 or the alignment drum 7
A main front gauge 8 which is axially mounted on the shaft of the German patent application No. 2046602 or which is axially movable on the alignment drum 7.
Is performed by the gripper 6 equipped with.

FIG. 4 shows an embodiment of a transmission for the alignment drum 7 which rotates at a variable speed.

To drive the suction roller 5, known static transmissions (for example DE 2160995).
No. specification).

Suction roller and alignment drum 7 laterally (in axial direction)
Devices for moving are described, for example, in DE 23 30 484 or GB 727967. However, especially when using a measuring device for measuring the position of the side edges of the sheet, for moving the alignment drum 7 or its gripper 6 and the main front gauge 8 with counter member, For example, a step motor or a hydraulic servo valve may be used.

A drive, for example a slider crank chain, is provided for driving the alignment drum 7. (A transmission with a rotating double-crank transmission, a non-circular wheel or the like may be used.) The spur gear 16 of the transfer drum 11 is a spur gear that is driven to rotate by the main drive. Gear 17 and spur gear 18 supported on journal 20 (pin extension) fixed to the side frame
Mesh with each other. A connecting rod 21 is fixed to the outside of the spur gear 18 and extends linearly in parallel to the radius "r" of the spur gear 18. A connecting link block 22 of a crank 23 extends in the groove of the connecting rod 21. The crank 23 is attached to the cylinder pin 24 of the alignment drum 7. The cylinder pin 24 is supported in the hole of the journal 20 fixed to the frame. The spur gear 18, the connecting rod 21, the connecting ring block 22, the crank 23 and the cylinder pin 24 form a second sheet accelerating device. The rotation axes of the alignment drum 7 and the spur gear 18 are located vertically above and below each other, and are arranged at a distance a. By the transmission device of the slider crank chain of the above type, the alignment drum 7 is moved from the low peripheral speed Vmin.
It is possible to accelerate to the maximum peripheral speed Vmax. Corresponding to the peripheral speed of 13. This acceleration work is performed within 180 ° of one of the rotation angles of the transfer drum 11. In the other 180 °, the peripheral speed of the transfer drum 11 is reduced to the maximum peripheral speed of the suction roller 5 (or a speed slightly lower than this).

In order to move the alignment drum 7 laterally by a precisely defined distance, the second cylinder pin 25 is fitted with a crank disc 26.
Is provided. It is also possible to selectively reverse the lateral movement direction of the alignment drum 7 by a known device (that is, to shift the phase of the lateral movement of the alignment drum 7 by 180 °).

Of course, the alignment drum 7 can be provided with multiple rows of grips and front gauges. In this case, the ranges of the low peripheral speed and the high peripheral speed of the aligning drum 7 at the sheet take-up position and the transfer position are arranged on the outer peripheral surface of the aligning drum 7 at positions that are not substantially opposite to each other, that is, at asymmetrical positions. It is also possible. In this case, the gearing is adapted accordingly.

It is advantageous to provide the main front gauge 8 with a cover gauge. It is also possible to use the gripper 6 itself as a cover gauge (see, for example, German Patent Application Publication No. 2744925). Further, before the final position adjustment of the sheet during the sheet insertion process, the main front gauge 8 is automatically adjusted in the vertical direction by a predetermined stroke on the outer circumference of the alignment drum 7 (height adjustment). May be provided. A device of this type is known from DE 2613174.

The main front gauge 8 of the alignment drum 7 can be precisely finely adjusted in the circumferential direction of the drum.

Of course, instead of the transmission for driving the alignment drum 7, it is also possible to use a normal type stepper motor.

Instead of the suction roller 5, other types of push-type feeders, for example suction-type belts running on the suction box, which act on the sheet from below (see DE 2313150). Using a reciprocating suction slider (see also British Patent No. 685037), which also acts on the sheet from below, or a driven pair of clamping rollers (see for example US Pat. No. 2984482). Is also possible.

It is also possible to use a swinging gripper as the first sheet accelerating device (for example, see British Patent No. 685037).

A sheet feeding device for influencing different slipping actions between the sheet 1 and the sheet feeding device which applies the suction load at different speeds, for example the suction roller 5, the suction belt and the suction slider. The drive transmission of the invention has a device for adjusting the stage status during operation. As a result, it is possible to optimally adjust the time when the sheet hits the main front gauge 8 during the paper inserting operation.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment of an apparatus for applying acceleration to a sheet according to the present invention, FIG. 2 is a graph showing the paper feeding time, and FIG. 3 is a scale-like arrangement. FIG. 4 is a graph showing the paper insertion time when the respective intervals of the produced sheets are set short, and FIG. 4 is a schematic side view and a front view of a transmission device for driving the alignment drum. 1 ... sheet, 2 ... sheet supply table, 3 ... auxiliary front gauge, 4 ... drawing guide, 5 ... suction roller, 6
... Gripper, 7 ... Aligning drum, 8 ... Main front gauge, 11 ... Transfer drum, 12 ... Gripper, 13 ... Impression cylinder, 14
… Blank cylinder, 16,17,18… Spur gear, 20… Journal, 21… Connecting rod, 22… Connecting link block, 23… Crank, 24,2
5 ... Cylinder pin, 26 ... Crank disk, 27, 28 ... Guide roller, r ... Radius, a ... Interval, S ... Range

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References Japanese Patent Publication No. 47-2365 (JP, B1) Japanese Patent Publication No. 32-3609 (JP, B1) Japanese Patent Publication No. 34-3016 (JP, B1) Japanese Patent Publication No. 34- 7164 (JP, B1)

Claims (23)

(57) [Claims] 1. A sheet-like sheet sent in a scaly form is aligned with its front edge and side edges and accelerated from a stationary position on a sheet-feeding table to an impression cylinder peripheral speed of a sheet-fed printing press. A method for feeding by feeding the sheet to be fed,
Grasp it with the gripper device of the sheet accelerating device and accelerate it from the stationary state to the partial peripheral velocity of the impression cylinder, and then with the second sheet of paper.
Caught by the gripper device of the sheet accelerator of
A method of accelerating with a second sheet accelerating device from a partial peripheral velocity of the impression cylinder achieved by a first sheet accelerating device to a velocity equal to or higher than the peripheral velocity of the impression cylinder. Predetermining the sheet (1) in the axial direction of the second sheet accelerating device during the sheet accelerating stage in the second sheet accelerating device (18, 21, 22, 23, 24) A method for aligning and accelerating a sheet and feeding it to an impression cylinder, characterized in that it is displaced by a distance of. 2. A method as claimed in claim 1, characterized in that the distance by which the sheet (1) is displaced in the axial direction of the second sheet accelerating device is constant. 3. The method according to claim 1, wherein the distance by which the sheet (1) is displaced axially of the second sheet accelerating device is variable. 4. The front edge and the side edge of the sheet fed in the form of a scale are aligned, and from the stationary position on the sheet feeding table to the impression cylinder peripheral speed of the sheet printing machine. Device for carrying out a method for accelerating and feeding, a first sheet accelerating device comprising a sheet feeding table (2), a front gauge (3, 8) and a gripper device. And a second sheet accelerating device cooperating with an aligning drum (7) with a row of grippers (6), said first sheet accelerating device from a stationary state being pressed. The partial peripheral speed of the cylinder (13) can be driven, and the second sheet accelerating device can be driven from the partial peripheral speed of the impression cylinder to a speed equal to or higher than the peripheral speed of the impression cylinder. In the form of a second sheet-accelerating device (18,21,22,23,24) axially during the sheet feeding movement. Rotatably it is characterized by being composed, apparatus for feeding the impression cylinder are aligned and accelerated sheet. 5. A row of grippers (6) provided on the outer periphery of the alignment drum (7) is arranged axially movable by a certain distance during the sheet feeding movement. The device according to claim 4. 6. A row of grippers (6) provided on the outer periphery of an alignment drum (7) is arranged so as to be axially movable a variable distance during a sheet feeding movement. The device according to claim 4. 7. A second sheet-accelerating device (18, 21, 22, 23, 24)
The device according to claim 4, wherein the device is arranged so as to be movable by a certain distance in the axial direction. 8. A second sheet-accelerating device (18, 21, 22, 23, 24)
The device according to claim 4, wherein the device is arranged so as to be movable in the axial direction by a variable distance. 9. A second sheet-accelerating device (18, 21, 22, 23, 24)
Device according to any one of claims 4 to 8, characterized in that the alignment drum (7) cooperating with is provided with a row of front gauges (8). 10. A second sheet-accelerating device (18, 21, 22, 23, 2).
The aligning drum (7) cooperating with 4) is provided with multiple rows of grippers (6) and front gauges (8),
Device according to any one of claims 4 to 9. 11. A front gauge (8) is arranged for fine adjustment in the circumferential direction of an alignment drum (7) cooperating with a second sheet accelerator (18, 21, 22, 23, 24). The device according to any one of claims 4 to 10, which is provided. 12. A second sheet accelerating device (18, 21, 22, 23, 2).
The gripper (6) of the alignment drum (7) cooperating with 4)
Device according to any one of claims 4 to 11, characterized in that it comprises a device used as a cover gauge, the gripper (6) being arranged in a height-adjustable manner. 13. A second sheet-accelerating device is a transmission device (1
It is configured as an alignment drum (7) provided with 8,21,22,23,24), and the transmission device has a range of low peripheral speed (Vmin) and a high peripheral speed on the outer peripheral surface of the alignment drum (7). (Vma
A device according to any one of claims 4 to 12, which is designed such that the range of x) is approximately diametrically opposed to each other. 14. A slider crank chain in circular motion for driving a non-uniformly rotating second sheet accelerator (18, 21, 22, 23, 24) is provided. The apparatus according to any one of items 4 to 13. 15. The first sheet accelerating device is designed as a suction roller (5), which is arranged axially movably during the sheet feeding movement. The device according to any one of claims 4 to 14, which is provided. 16. The device according to claim 4, wherein the first sheet accelerating device is configured as a push-type feeding device. 17. Device according to claim 16, characterized in that the push-type supply device is provided with a suction roller (5) arranged below the sheet supply table (2). 18. A push-type feeding device comprising a suction slider which is arranged below the sheet feeding table (2) and which is reciprocally moved by being loaded with suction air. The described device. 19. The suction type belt, which is arranged below the sheet feeding table (2) and runs on a suction box, is provided as the push type feeding device.
Item 16. The device according to Item 16. 20. The push-type feeding device is provided with a plurality of cooperating driven clamping rollers arranged above and below the sheet feeding table (2). The device according to item 16. 21. The apparatus according to claim 16, wherein a sheet gripper with a swing motion is provided as the first sheet accelerating device. 22. Sheet (1) whose side edges are to be aligned
5. Device according to claim 4, characterized in that it is provided with a lateral edge pulling device acting as a pulling guide (4) acting from above or below. 23. A measuring device for detecting the actual position of the side edge of the sheet (1) which is applied to the auxiliary front gauge (3) each time is provided in the sheet side edge range.
The device according to claim 4.