EP1012098A1

EP1012098A1 - Device for conveying folded signatures

Info

Publication number: EP1012098A1
Application number: EP97911133A
Authority: EP
Inventors: Holger Ratz
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 1996-10-12
Filing date: 1997-10-04
Publication date: 2000-06-28
Anticipated expiration: 2017-10-04
Also published as: DE19642118C2; EP1012098B1; ES2168616T3; JP2000503959A; DE59706120D1; DE19642118A1; US6179111B1; WO1998016452A1; JP3249137B2

Abstract

The invention concerns a device for conveying and distributing folded signature (24, 26), wherein the signatures removed from the bucket wheel (2) of a folding apparatus by means of a gripper chain (6) are distributed to preselectable distribution points (A, B, C, D, E). The signatures are each transferred by means of a controllable switching unit, for example in the form of a motorized cam plate (33 to 37) which can be controlled or regulated. To that end, the switching cams are disposed in a switching or in a non-switching position on the cam plate.

Description

Device for transporting folded signatures

The invention relates to a device for transporting folded signatures according to the preamble of claim 1.

A device of the generic type has become known from WO 96/06032. A switching wheel having a plurality of switching cams is provided for switching the gripper holding signatures. The

The peripheral speed of the switching cams of the switching wheel is synchronized with the transport speed of the gripper chain. The switch cams therefore slowly come into contact with the control roller assigned to them from above and slowly push them into an "open position". As a result, it is not possible to give the signatures exactly, so that the scale spacings become irregular. This leads to malfunctions in downstream processing machines.

The invention has for its object to provide a device for transporting and distributing folded signatures removed from a paddle wheel by means of a gripper chain.

This object is achieved by the features of the characterizing part of claim 1. The advantages which can be achieved with the invention consist in particular in that a gripper chain is used which has a simple structure. Short switchover times are possible, so that a different distribution point can be provided for each folded signature even at high gripper chain speeds. Advantageously discontinuously drivable cam disks with a plurality of switching cams, which are rotated or precisely controlled, are used to actuate the gripper mechanism.

The switching cams of a cam disc are brought into the path of the control roller of the Grei fe r system and stopped before the control roller reaches the switching location. The switching process therefore takes place when the cam disc is stationary. A "creeping" triggering process is therefore avoided. The course of the gripper chain can be kept straight or only slightly curved on its way to the individual distribution stations.

An embodiment of the invention is shown in the drawing and will be described in more detail below.

Show it

Figure 1 is a schematic representation of the side view of the distribution device.

FIG. 2 shows a detail "Z" according to FIG. 1 with an enlarged illustration of a closed gripper;

Fig. 3 shows a detail "Y" of Figure 1 with an enlarged view of an open Grei fers.

Fig. 4 shows a detail "X" of Figure 1 with an enlarged view of a frame-fixed control curve for closing the pivotable K lemmbac ke.

5 shows a basic circuit diagram for the drive of the device according to FIG. 1.

A known paddle wheel 2 is arranged below a belt system 1 coming from a folder. The paddle wheel 2 can, for. B. consist of four spaced apart on a shaft 3 fixed individual paddle wheels. A chain wheel 4 fastened on the shaft 3 is arranged between the second and third individual paddle wheels. The sprocket 4 has z. B. 15 teeth and leads a gripper chain 6. Tooth gaps of the sprocket 4 are with each chain link 7 rollers 8 positively in egg ngri ff.

Each chain link 7 carries a gripper 9, which consists of a fixed and a pivotable jaw 11 and 12, respectively (FIGS. 2 and 3). The fixed jaw 11 is substantially V-shaped according to the side view (Fig. 1 to 3) and firmly connected to the chain link 7. The pivotable jaw 12 is designed as the first arm of a three-armed lever arm. A second lever arm is designed as a control lever 13 and carries a roller 14. The control lever 13 can be actuated in each case on a control cam 16 which is fixed to the frame and is located in the vicinity of the paddle wheel 2 in order to close the pivotable clamping jaw 12. Likewise, the control lever 13 can be actuated in each case on a cam disk 33 to 37 to be described in order to open the pivotable clamping jaw 12. A third lever arm is designed as a spring tensioning lever 17, which carries a force application point 18 of a prestressed tension spring 19 at its end. An abutment 21 of the tension spring 19 is located in the vicinity of the base 22 of the V-shaped fixed jaw 11.

All lever arms 12; 13; 17 of the three-armed lever arm have their origin in a pivot point 23. This fulcrum 23 is connected to a bearing, which is located at the chain link end of one of the two legs of the V-shaped, fixed jaw 11.

The levers 13; 17 can also be arranged on both sides of each chain link 7. Accordingly, two tension springs 19 and two rollers 14 are then also provided.

The existing endless gripper chain 6 consisting of the chain links 7 with the grippers 9 each fixedly attached to them will meet the produkt i ontechni needs with its lower strand at several distribution points A, B, C, D, E for distributing folded signatures 24;

26 passed by.

The path of movement of the gripper chain 6 in the area of the distribution points A, B, C, D, E is straight or at most slightly curved.

Such distribution points can e.g. B. be:

A a waste switch, B a sample sheet removal part and C, D, E delivery points for folded signatures 24;

26.

There is a belt system under each distribution point A to E.

27 to 31 for receiving the delivered signatures 24; 26 provided.

At each distribution point A to E there is a controllable one Switching unit, e.g. B. a cam 33 to 37, each distributed evenly on its circumference, several - z. B. three - control cam 38. Each cam disk 33 to 37 is non-rotatable with a rotat i onswi nke l-positionege Iten motor, z. B. servo motor, M33 to M37 connected. A rotor of a position sensor L33 to L37 fixed to the frame is connected in a rotationally fixed manner to each cam disk 33 to 37. Each position encoder L33 to L37 is a rotation angle position encoder and is e.g. B. executed as a rotary encoder with reference mark and z. B. positively arranged on the cam 33 to 37. Both the motor M33 to M37 and the position sensor L33 to L37 of each cam plate 33 to 37 are electrically connected to an anti-friction control Le F33 to F37 with integrated position detection. All drive rules F33 to F36 are connected to a computer unit 41 for data exchange via a data bus 39 (FIG. 5). The computer unit 41 is also electrically connected to switches S33 to S37 for the preselectable actuation of one or more distribution points A to E.

The shaft 3 of the paddle wheel 2 or chain wheel 4 is both mechanically with z. B. a drive motor M2; 4 as well as with a position and speed sensor L2; 4 and subsequently connected to the computer unit 41.

The shaft 3 of the blade or chain wheel 2; 4 can also by means of a coming from the folder Ant ri ebs wheeled train. Unless otherwise stated, all of the facilities described are stored in the same position.

The operation of the device is as described below. The coming from the folder on the belt system 1, -. B. different -, signatures 24; 26 continuously fall into a shovel pocket of the paddle wheel 2. The gripper chain 6, which rotates at the same time as the paddle wheel 2, adopts each of the signatures 24 coming in one after the other; 26. After each of the rollers 14 of the control levers 13 have run on the side gest If l ten control curve 16, each signature 24; 26 clamped in the grippers 9 by the interaction of the pivotable jaws 12 with the fixed jaws 11. During this pivoting movement of the three-armed control lever 13 (corresponding to the clockwise direction of rotation - FIG. 3), the tension spring 19 is pivoted from its stable open position to an extended dead center position in a stable closed position (FIG. 2). While the dead center position is the abutment 21, the pivot point 23 and the force application point 18 on an imaginary straight line. In the open position or closed position, however, the tension spring 19 is in a relaxed, stable position relative to the dead center position. Switching from one position to another takes place with only a small amount of force within a period of a few minutes 11 seconds. Should the signatures 24; 26 z. B. at the distribution points C and D, the assigned switches, z. B. Switches S35 and S36 operated. The rot at i onswi nke I exact rotation of the motors M35; M36 and thus the cam discs 35 and 36 triggered. The cam disks 33; 34 at the distribution points currently not distributing z. B. A, B are then in a "non-control position" in which the cam discs 33, 34 are such that their cams 38 are outside the path of movement of the rollers 14 of the control lever 13 (Fig. 2). The switching - and non-switching - control surfaces can be straight and / or curved. The non-switching control surface is not curved in the present case (FIG. 1). Appropriately and for security reasons, the cam disks 37 of the last distribution point E are always in the “off” position in order to ensure that all signatures 24; 26 can be removed. Instead of the cam disk 37, a stationary control cam can also be provided for opening each pivotable clamping jaw 12, provided that an opening has not already taken place beforehand. The roller 8 of a gripper 9 carrying a signature 24 runs into the area of a non-switching area of the cam disk 35. The cam disk 35 rotates counterclockwise (FIG. 1) so that a cam comes into operative connection with the roller 14 of the control lever 13. The lever 13 is countered the clockwise direction of rotation pivoted (Fig. 2), so that the signatures 24 are stored on the tape system 29. The same process is repeated on the cam disk 36 with a subsequent signature 26. There, the signatures 26 are placed on the belt system 30.

The cam disk 35 or 36 is rotated to open the corresponding gripper 9, preferably discontinuously by an angle of rotation of 120 ° in each case. The cam disks 35 act; 36 with M35 engines; M36, the position encoders L35; L36, the drive control F35; F36 and the computer unit 41 together in the manner described above. The motors M33 to M37 are preferably designed as multiple motors.

It is also possible to feed all signatures to a waste container 42 via the belt system 27 or to include the distribution points B and E which have not been used previously. If all signatures 24; 26 are fed to the waste container 42. So it would be possible to use a cam instead of the cam 33, which, for. B. is pivotable by means of a working cylinder in an "off" position.

In summary, the essence of the invention is that a rotatable control device 33 to 37 is provided, which has rotat i onswi nke l- position-precisely controlled or regulated switching cams, wherein the switching cams are arranged in a switching or in a non-switching position on cam disks 33 to 37.

The peripheral speed of the highest points 32 of the switching cams 38 during their movement from a non-switching movement into a switching position is higher or at least temporarily higher than the transport speed of the chain.

The direction of rotation of the cam disks 33 to 37 can always be in or always against the transport direction of the gripper chain 6. But also constantly back and forth when the switchover times are irrelevant.

In an advantageous manner, each pivotable clamping jaw 12 can be selectively controlled individually, that is to say, for example, only it can be moved to a specific location and no other.

Reference list

1 belt system

2 shovel wheel

3 waves (2)

4 sprocket (2)

5

6 gripper chain

7 chain link (6)

8 rolls (7)

9 grippers

10th

11 jaw, fixed (9) 2 jaw, swiveling (9) lever arm, first 3 control levers; Lever arm, second 4 roller (13) 5 6 control curve 7 spring tension lever; Lever arm, third 8 force application point (19) 9 tension spring 0 1 abutment (19) 2 base (11) 3 pivot point (12, 13, 17) 4 signature 5 6 signature 7 hinge system (A) 28 belt system (B)

29 belt system (C)

30 belt system (D)

31 hinge system (E)

32 highest point (38)

33 cam disc (A)

34 cam disc (B)

35 cam disc (C)

36 cam disc (D)

37 cam disc (E)

38 switch cams (33 to 37)

39 data bus

40 -

41 computer unit

42 waste bin

M33 to M37 engine (33 to 37)

L33 to L37 position transmitter (33 to 37)

F33 to F37 Ant r i ebs reg le r (33 to 37)

S33 to S37 switches (33 to 37)

M2; 4 motor (2; 4)

L2; 4 position and speed sensors (2; 4)

A distribution point (24; 26)

B distribution point (24; 26)

C distribution point (24; 26)

D distribution point (24; 26)

E distribution point (24; 26)

Claims

Expectations

1. Device for transporting and distributing signatures (24; 26) held in controllable grippers (9) of an endless gripper chain (6) to a plurality of distribution points (A, B, C, D, E) along the movement path of the gripper chain (6 ), for the opening of the gripper (9) rotatable, rot at i onswi nke l- position precisely driven control devices (33 to 37) are provided, the control devices (33 to 37) having a plurality of switching cams and from a non-switching to a switching position and can be reversed, characterized in that during the rotational movement of the control devices (33 to 37) from the non-switching to the switching position and vice versa, these can each be driven in such a way that the circumferential speed of the highest points (32) of their switching cams (38) at least is sometimes higher than the transport speed of the gripper chain (6) during this reversal process.

2. Apparatus according to claim 1, characterized in that the direction of rotation of the cam discs (33 to 37) in transport direction of the gripper chain (6).

3. Apparatus according to claim 1, characterized in that the direction of rotation of the cam discs (33 to 37) opposite to the T ransport direction of the gripper chain (6).

4. Device according to claims 1 to 3, characterized in that the gripper (9) at a preselectable distribution point (A to E) is evident.

5. Device according to claims 1 to 4, characterized in that each cam (33 to 37) is assigned a motor (M33 to M37) which can be controlled by means of a computer unit (41) that one of the cams of the cam (33 to 37) can be temporarily brought into the movement path of the control roller (14).

6. Device according to claims 1 and 5, characterized in that each motor (M33 to M37) consists of a rotat i onswi nke l- Lagenege brisk Iten motor.

7. Device according to claims 1 to 6, characterized in that each motor (M33 to M37) is assigned a rotational angle position encoder (L33 to L37).

8. Device according to claims 1 to 7, characterized in that the motor (M33 to M37) and the position sensor (L33 to L37) is electrically connected to an ant r ebs regulator (F33 to F37).