DE1786196A1 - Method and device for setting paper sheets in printing machines - Google Patents

Description

16 206

Hamada Printing Press Mfg., Co., Ltd., Osaka / Japan

Method and device for paper sheet setting at

Printing machines

The present invention relates to a method of adjusting the position of sheets of paper for feeding same in. "the printing unit of a printing press and a device for performing this method.

In a printing machine with a non-sheet paper feed, the sheets individually transported by a paper stacking unit of a transport unit are briefly stopped before they are introduced into the printing machine, so that the desired timing between the paper sheet feed and the printing process is achieved. If the individual sheets of paper are not brought into the correct position, incorrect printing occurs. Accordingly, various attempts have been made to eliminate such misprints by correcting the position of the paper sheet in the aforementioned rest position . 209815/044 9!

To position a sheet of paper in the correct position, it was proposed, for example, to grasp the sheet from above and below by means of rollers, with one edge of the Sheet is guided against an adjustment rail. It has also been proposed that the paper sheet with the help of a no driven roller and a reciprocating block to detect, the edge of the paper sheet then against an adjustment rail by a back and forth

_ Movement of the block is brought about. After all, it can

Paper sheet inserted between a stationary block and a reciprocating block and gripped by the same one edge of the paper sheet by the reciprocating movement of the latter block against an adjustment rail to be led*

If, however, very weak or thin sheets of paper the previously known arrangements are to be printed, creases can occur on the edge of the paper sheet, on the side that is guided against the adjustment rail. This edge can be bent up whereby the desired setting of the paper sheet is not achieved, so that the printing process is not more satisfactory Way can be done.

209815/0449

The aim of the present invention is to create a method which does not have this disadvantage mentioned above and which, with a very simple and fault-free construction, enables precise positioning of even very thin and weak paper sheets - regardless of the quality, size and type of Paper type - made possible.

It is also part of the present invention, an apparatus to create that works according to this procedure.

According to the invention this is achieved in that first the sheet of paper upwards with the help of a suction mechanism is sucked that then the edge of the sucked paper sheet by moving the suction mechanism is guided against a position adjustment surface of an adjustment rail and that finally after reaching the adjustment position the paper sheet is released from the suction surface and fed to the printing unit.

Further details of the invention are given below with reference to an embodiment for carrying out the invention Method will be explained and described in more detail, reference being made to the accompanying drawings is. Show it:

20981S / 0449

Fig. 1 is a side view of part of the printing unit the printing machine with a paper feed unit, a transport device and an inventive Paper sheet adjusting device;

Fig. 2 is a partial view of the paper sheet setting device according to the invention;

3 is a sectional view taken along line 2-2 of FIG.

4 is an enlarged partial sectional view of the main element the suction mechanism of the paper sheet adjusting device according to the invention and

Fig. 5 is an enlarged partial sectional view of the valve of the Suction mechanism.

In the following, reference should be made to the figures, in particular FIG. 1.

A rod 2 is arranged in such a way that it carries out a kinetic and reciprocating movement for each rotation of a cylinder 1. At the end of the rod 2, one end of a crank 6 be "W solidifies, engages the other end on a shaft 5 which is driven by a drive gear 3 by means of a gear train. 4 The other end of the rod 2 is pivotably attached to a part of a lever 7 which is arranged at a distance from the bearing point 8. One end of the lever 7 is pivotably attached to a cam element 9,

209815/0449

which can perform back and forth movements according to the arrow a in FIG. In contact with the cam surface of the cam element 9, a roller 11 is provided which is attached to a pivot element 13 which can pivot about a pivot point 12 in the direction of the arrow b of FIG. One end of the pivot element 13 is fastened on an axle 14 in that one end of the pivot element 13 is loosely inserted in a space (not shown) of a receiving element 15 attached to the end of the axle 14. Due to this arrange- ä drying the axis 14 back and forth movements can in the direction of arrow C of FIG. 2 perform.

A suction mechanism has a main member 16 and a valve 17. The main element 16 of the suction mechanism is on the bottom wall 20 of a vacuum chamber 18 with a sheet of paper suction surface 21 provided, the bottom wall 20 a has the number of air inlets 19 corresponding to the requirements. The upper end of an inlet channel 22 is standing to the vacuum chamber 18 through an opening at one end the bottom wall 20 of the vacuum chamber 18 in connection. As shown in Figure 5, there is the valve from a stationary part 23 and a pivoting part 24, with an axis extension 25 being provided which extends from the central part of the stationary part 23 protrudes and

2Q9815 / 0U9

lies loosely in an opening 26 of the pivoting part 24. That Pivoting part 24 can perform pivoting movements on axle extension 25. Between a flange 27 of the axle attachment 25 and the pivoting part, 24 a spring 28 is used, which the pivoting part 24 against the stationary part 23 presses.

On the contact surfaces of the parts 23, 24 are openings 29, 29 * "arranged with an identical rectangular cross-section. While the opening 29 of the stationary part 23 is in communication with an opening 30 of the stationary part the opening 29 ′ of the pivoting cable 24 with an opening 31 of the pivot part 24 in connection. The opening 30 is connected to a vacuum pump, not shown, and the opening 31 connected to the inlet channel 22. At the protruding end of the pivoting part 24, a roller 32 is arranged, which is arranged by a spring 34 against one on the shaft 5 Cam 33 pushes.

Due to the rotation of the cam 33 driven by the shaft 5, the pivoting part 24 is positioned on the axle extension 25 pivoted, whereby the opening 29 of the stationary part 23 and the opening 29 'of the pivoting part 24 with each other get in touch. Accordingly, the two openings 29, 29 'can be brought into communication with one another as desired will.

209815/0449

According to the above-mentioned arrangement, when the valve 17 is operated, the vacuum chamber is brought into the state of air suction as desired. At one end of a connecting plate 35 protruding from one end of the main element 16 of the suction mechanism, a projection 36 is attached through which the axis 14 passes ₅ . the position of the main body 16 with respect to the axis 14 can be adjusted by means of a screw 37. In a desired part of the connecting plate 35, a guide bore is arranged in which a guide rod 38 λ, parallel to the axis 14, loosely engages.

On the other hand, an adjusting rail 39 for the feed of the paper sheets has an L-shaped cross section and consists of a horizontal rail part 40 and a vertical rail part 41, the horizontal Rail part 40 lower than the suction surface mentioned above 21 on which a conveyor belt 42 is arranged.

Between the conveyor belt 42 and the suction surface 21 is

a distance 43 is provided, whereby the position of the leading sheets of paper can be adjusted.

ί At a suitable location on the vertical rail part 41 is a guide hole 44 for guiding the channel the vacuum chamber 18 is arranged.

209815/0449

BAD Givilrt

A surface 45 of the vertical rail part 41, which serves to correct the position of the paper sheets, is on the

l '

Side of the distance 43 arranged, with on the opposite Side a screw for adjusting the position of the adjusting rail 39 protrudes. In a similar way it is a pin 47 for adjusting the position of the adjustment rail 39 provided. Parallel to the axis 14, a support rod 48 is provided, which forms the pivot point already mentioned 12 at one end thereof results. The support bar

hangs by a lug 50 at one end of a base plate

; 49 to adjust the position of the adjustment rail 39.

With the help of a screw 51, the position of this base plate 49 can be adjusted with respect to the support rod 48. The already mentioned screw 46 is through a Boh-ί tion guided within the base plate 49. A nut is screwed onto the inserted end of the screw 46, a spring 53 is arranged between the base plate 49 and the vertical rail part 41. Another . Spring 55, however, is arranged between the base plate 49 and a spring holder 54 at the end of the pin 47, this pin 47 through a hole in the Base plate 49 is guided> so that the screw connection formed by regulation by the screw 46 and nut 52 the position of the adjustment rail 39 in relation to the base plate 49 can be adjusted very precisely.

209815/0449 bad original

Guide bores 56 arranged in the base plate 49 and: 56 'are from the axis 14.bzw. the guide rod 38 penetrates. Below the end of the horizontal rail part the adjustment rail 39 is a roller 57 of the conveyor belt 52 arranged. In the drawing, reference numeral 58 denotes the curved edge at one end of the base plate 49. On the other hand, reference numeral 59 denotes one Guide through which the sheets of paper are guided without the same can be lifted off.

According to the present invention, one of a paper feed unit 60 sheet of paper A transported on the conveyor belt 42 momentarily through a sheet in front of the cylinder 1 on the pressure unit arranged stop 61 held. The stop 61 is between the cylinder 1 and a A pair of guide rails 62 and 62 / arranged, these guide rails 62, 62 ^ grip the sheet of paper A. and by one arranged within a guide plate 63 lead opening upwards, with the sheet following Wish can be recorded. To achieve a suitable timing match between prints the printing machine and the feeding of the sheet, the sheet can be held by the stop 61 instantly.

209815/0449 original ihqpevt

As soon as the sheet of paper briefly, as described above, is held by the stop 61, the shaft 5 is above the gear train 4 by the rotation of the cylinder 1 rotating drive gear 3 driven, whereby with Using the crank 6, the rod 2 is moved in one direction. With the help of the lever 7, the cam element is thereby 9 pushed forward, whereby the pivot element 13 with The roller 11 in contact with the cam surface 10 performs a pivoting movement in one direction. As a result, the axis 14 is in one direction moved, whereby the main member 16 of the axle-mounted suction mechanism through the connecting plate 35 including the vacuum chamber 18 is moved in one direction while passing through the guide bore 44 in the vertical rail part 41 of the adjustment rail 39 is guided. On the other hand, due to the by the Shaft 5 caused rotation of the cam 33 the pivoting element

24 pivoted by the roller 32 pressing against the cam 33, whereby the two within the pivoting part or the openings 29 and 29 ^ located in the stationary part 23 move into an aligned position and the vacuum pump through the inlet channel 22 with the vacuum chamber 18 is connected. This connection taking place simultaneously with the movement of the main element 16 of the suction mechanism causes the suction effect caused by the vacuum chamber 18.

209815/0449

ORIGINAL

In order to now transport a sheet of paper A to be inserted into the space 43 in order to adjust the feed position, the sheet is briefly locked by the stop 61. The vertical width of the distance 43 is several times the thickness of the sheet of paper. As soon as the main element of the suction mechanism 16 is moved ,, the sheet of paper A in the range of the spacing 43 due to the by Lufteinläs-, se 19 of the vacuum chamber 18 resulting suction against the suction surface 21 out. _{Due to the movement of the aforementioned rod 2 in the opposite direction, the axis 14 is also moved 3} in the opposite direction with the aid of the lever 7 of the cam element 9 and the pivot element 13, whereby the main element 16 of the suction mechanism including the vacuum chamber 18 in the! opposite direction is moved through the guide bore 44 through. Due to this movement, one edge of the sheet A sucked against the suction surface 21 is guided against the position adjustment surface 45 of the vertical rail part 46 of the adjustment rail 39. Subsequent to bringing the side edge of the paper against this suction surface 21, the pivoting part 24 is pivoted due to the rotation of the shaft 5 by the roller 32 pressed against the cam 33, whereby the connection existing between the two openings 29 and 2S ^ is interrupted by the opening 29 of the stationary part 23 from contact

209815/0449

with the opening 29 / of the pivoting part 24 is brought. As a result, the connection between the vacuum pump and the vacuum chamber 1.8 is interrupted. The suction of the Vacuum chamber .18 is therefore interrupted and that against the position setting plane 45 and thus against the suction surface 21 guided sheet of paper A separated from the suction surface 21 so that the same falls onto the conveyor belt 42. In this way, in accordance with the present invention the sheet of paper A against a by the suction mechanism

ψ Position adjustment surface 45 guided, whereupon a side edge thereof is brought into contact with the same, the same is sucked and its position is corrected. This paper A is then released from the position adjustment surface 45 and fed to the conveyor belt 42 and thus to the cylinder 1 of the printing unit. As a result, papers of any quality, any type and any size including very weak and thin papers can be used. Paper - adjusted in position and then the cylinder 1 one

* Printing unit can be fed, making a more satisfactory Printing can be achieved without incorrect position adjustment.

In the previously known arrangements, the paper sheets during their transport against a positioning rail guided with the help of rollers or blocks,

209815/0449

BATH

with creases on weak and thin types of paper and bending of the side edge of the paper brought into contact with the positioning rail may occur.

In contrast to the conventional arrangements, however, in the present invention, the paper is sucked onto the suction surface 21 on only one side, ie on the upper surface, whereupon the paper sheet is guided against the position adjusting surface 45 in this state. * Should the paper sheet A be fed further forward beyond the specified position to be set, the side edges prevent the paper sheet A from being fed beyond this position when it comes into contact with the position setting surface 45. In this case, the paper sheet is held in a predetermined position - ie the position in which the side edge thereof comes into contact with the position setting surface 45 - relative to the vacuum chamber 13 or the suction surface 21, while the suction plane 21 is held relative to the paper contact surface slides or moves. Accordingly, the present invention according itself easily to \ buckling or self-bending brought prone paper in the · = correct feeding position * As the correct positioning with the help of the paper sheet to a suction plane ansaugendem vacuum is sought, the transporting force can be very slightly depending on the quality of the paper as well as its thickness, thickness, size can be set. In addition

209815 / 0Λ49

ORIGINAL MSPcGTED

- ■ 14 -

can follow the paper sheet Λ according to its quality and similar factors in very quick, easy and more precisely, sucked onto the suction surface 21 and transported to the exact feed position. In comparison with known arrangements is a more accurate and failure-prone mode of operation by the device he invention achieved.

The suction device according to the invention also protects the paper sheets against possible dirt and contamination. Even if dust or similar impurities are present on the side of the paper sheet A facing the suction plane should be, such dust and contaminants through the air inlets 19 when sucking the paper sheets sucked into the vacuum chamber 18 so that the sucked paper sheets A on their sucked side free from contamination will. j

When a paper sheet according to the invention briefly through the stop 61 is locked, the same is within the Room 43 and then dtrch the main element 16 of the suction mechanism is moved in one direction by means of diflf rotation of the cylinder 1 b # actuated devices ii. Thereupon the main element 16 is d ^ s suction mechanism in moves in the opposite direction, causing the side edge of the sheet of paper A against the position adjusting surface

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BATH ORIGINAL

and the paper position is adjusted. Thereupon the valve 17 is operated, whereby the suction of the vacuum chamber 18 is terminated, so that the paper sheet A falls away from the Saügebene. This series of operational steps is carried out in a predetermined manner.

Since the position setting of the paper sheet A according to the Invention is achieved by suction, the corresponding functions are synchronized in a very simple way, thereby a very simple, fast and reliable mode of operation practically without setting the corresponding Actuating mechanism is guaranteed. With a very fast positioning as described above of the paper sheets, the feeding of the papers to the cylinder 1 of the printing unit of the printing machine can be very] can be performed quickly even when using a high-speed printing machine, resulting in an essential Increasing the printing speed and thus the printing press utilization leads.

The above-mentioned space 43 is essentially formed by the suction surface 21 of the vacuum chamber 18 and the conveyor belt determined, the vertical thickness of this space being twice or three times the thickness of the sheets of paper used should be. As one side of this room through the

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BATH

Vertical rail part position adjusting surface 45 _; 41 of the adjusting rail 39 is limited, after the release of the suction, precise positioning of one side of the paper sheet A in contact with the position adjusting surface 45 is achieved, the adjusted position of the paper sheet Λ being maintained even after the release of the suction connection. The front edge of the paper sheet A is of course adjusted by the stopper 61. Since the two openings 29 and 29 'of the VEN W are executed TILs 17 identical rectangular, mutual correspondence can be prepared within a relatively short period of time. As a result, the suction effect of the vacuum chamber 18 increases very quickly, whereby the individual sheets of paper A are sucked in very quickly. On the other hand, when the paper sheets A are loosened, a very rapid decrease in the suction force of the vacuum chamber is brought about, whereby the process of detaching the paper sheets A is also brought about very quickly.

Since the main element 16 of the suction mechanism according to FIGS Finding is joined only within the guide bore 44 of the vertical plate 41 of the setting plate 39 and the Position of the adjustment surface 45 of the adjustment rail 39 in relation to the stop 61 is very simple and precise - and

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BATH

although independent of the main body 16 of the suction mechanism - can be adjusted by the screw connection between the screw 46 inserted through the base plate 49 of the vertical rail part 41 and the Nut 52 is adjusted. As a result, the paper sheets A fed to the cylinder can be very quickly and can be adjusted exactly to the desired position.

20981S / 0449

BATH ORIGINAL

Claims (4)

PATH N TA NSPROCHE ./Method for adjusting the position of paper sheets for feeding them into the printing unit of a printing machine, characterized in that first the paper sheet (& is sucked upwards with the aid of a suction mechanism, that then the edge of the sucked * paper sheet (A) by moving the Suction mechanism is guided against a position adjustment surface (45) of an adjustment rail (39) and that finally, after reaching the adjustment position, the paper sheet (A) is released from the suction surface and fed to the printing unit. 2. Apparatus for performing the method according to claim 1, characterized in that a suction mechanism with a Suction surface (21) is provided, further that a space (43) for adjusting the position of the paper sheet (A) under- " half of the suction surface (11) is arranged and that an adjustment rail (39) with a position adjustment surface (45) and a drive mechanism is provided for transporting the suction mechanism in the direction of the adjusting rail (39). ^BATH 3. Apparatus according to claim 2, characterized in that the suction surface (11) of the suction mechanism air inlets (19) are provided, that the vacuum channel (18) arranged above the suction mechanism is in communication with an inlet channel (22), that an opening in the vertical rail part (40) of the adjusting rail (39) for guiding the displaceable vacuum chamber (18) is provided and that between a conveyor belt '(42) and the horizontal rail part (40) of the adjusting rail (39) a space (43) % for adjusting the Position of the paper sheets (A) is provided, this space (43) through the. Suction surface (21) the position adjustment surface (45) of the vertical rail part (41) and the horizontal rail part (40) is limited. 4. Apparatus according to claim 2 or 3, characterized in that the valve (17) has a stationary part (23) with a with the vacuum pump connected opening (29) and a movable part (24) with an inlet channel (22) has opening (29 ·) communicating with the vacuum chamber (18), both openings (29, 29 ^f ) being able to be brought into connection with one another synchronously with the transport of the suction mechanism. 209815/0449 BAD OKiQiNAL Lee fe te