DE102008041843B4 - Printing unit of a printing press with at least two relatively mutually positionally adjustable frame parts - Google Patents

Abstract

Printing unit of a printing machine with at least two frame parts (13; 14) which can be changed in position relative to one another, wherein interacting frame parts (13; 14) are positioned against one another in a first operating position on a common joining surface (16) and are positioned against one another in a second operating position, with between the A gap (17) partially delimited by these frame parts (13; 14) is formed in the printing unit (01) when the frame parts (13; 14) are parked, an access control device (33) being provided at an access to the gap (17), wherein the access control device (which can be activated or deactivated as a function of a distance (x) formed between the frame parts (13; 14) which can be changed in position relative to one another, and has at least one second sensor (38) which, as a function of the between the relative mutually variable position frame parts (13; 14) formed Distance (x) is adjustable in a length (l) of a detection area (37), - with at least one third sensor (31) in the space ...

Description

The invention relates to a printing unit of a printing press with at least two frame parts that can be changed in position relative to each other.

By the WO 95/24314 A1 and the WO 2005/037 553 A1 are each a printing unit of a printing machine with at least two relatively mutually positionally adjustable frame parts known, cooperating frame parts are employed in a first operating position against each other and parked in a second operating position, wherein between spaced-apart frame parts in the printing unit is formed by these frame parts partially limited space , wherein in the respective cooperating frame parts in each case at least one printing unit cylinder is mounted.

By the EP 0 444 227 A1 is a printing machine with a printing unit with at least two relatively mutually positionable frame parts known, wherein in a stationary frame part printing cylinder and in the at least one movable frame part at least one inking unit are arranged cooperating frame parts in a first operating position against each other and turned off in a second operating position are, between spaced-apart frame parts in the printing unit is formed by these frame parts partially limited space, wherein at an access to the space an access control device is provided, wherein the access control device comprises at least one sensor, wherein the at least one sensor in response to a between the formed relative to each other positionally variable frame parts distance can be activated.

By the DE 102 24 031 B3 a device for monitoring a detection range on a work equipment is known, with at least one redundant camera system consisting of two cameras and a beam splitter upstream of this, over which images of the detection area on both cameras for capturing safety-critical objects within at least one protection zone can be mapped, and with two Computer units, wherein in each case a computer unit is connected to one of the cameras for evaluating the image information recorded there, and wherein both computer units are coupled to each other for mutual verification, and with at least one of the computer units controlled switching output, via which the work equipment is only then put into operation if there is no safety-critical object within the protection zone.

By the EP 1 790 474 A1 is a printing machine with a printing unit with a fixed frame part and at least one movable along a linear travel frame part known, the fixed frame part has at least one printing unit, wherein at least one inking unit is arranged in the movable frame part, wherein cooperating frame parts in a first operating position against each other employed and are set apart from each other in a second operating position, between spaced frame parts of these frame parts partially limited space is formed, wherein a safety device is provided which detects by means of a mounted on the movable frame part detection means presence of an obstacle in the travel of this movable frame part.

The invention has for its object to provide a printing unit of a printing machine with at least two relatively mutually positionable frame parts, wherein an outgoing of at least one moving frame part of this printing unit endangerment of a person in a danger zone of this printing unit halting operator is prevented.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that the printing unit has a high reliability. The printing unit has, in particular, a safety device which helps to prevent a danger emanating from at least one moving frame part of this printing unit of an operator staying in a danger zone of this printing unit.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

1 A printing unit with two positionally changeable frame parts in a first operating position;

2 the printing unit of 1 with their frame parts additionally in a second operating position;

3 a block diagram;

4 Embodiment variants of a monitoring of the frame parts of the printing unit trained space and an access control device;

5 a further embodiment of the access control device.

1 and 2 each show an example as a tower, in particular designed as an eight-tower, in a z. B. frame-shaped frame 12 enclosed printing unit 01 a rotary printing machine preferably usable for colored newspaper printing, wherein the printing unit 01 in a very compact design, ie in particular designed with a low overall height. To form a trained as a 16-tower printing unit 01 also two such four-high towers are aufeinandersetzbar. One in the printing unit 01 to be printed preferably web-shaped substrate 02 , z. B. a paper web 02 is preferably substantially vertical through the printing unit 01 guided. Preferably on both sides of the paper web 02 are preferably each more printing units 03 arranged, each of these printing units 03 at least one printing cylinder 04 , in particular transfer cylinders 04 , and preferably also one with this transfer cylinder 04 cooperating form cylinder 06 having. Every printing unit 03 is also with a multi-rolls preferably zonenlosen inking unit 07 equipped, z. B. with an anilox roller having a short inking unit 07 , where the rollers of the inking unit 07 from a paint reservoir 09 Form recorded ink to a thin color film and this color film in its layer thickness uniform and the respective forme cylinder 06 transport for order on at least one of the forme cylinder 06 arranged printing form. The respective form cylinder 06 of every printing unit 03 has an axial length in the range z. B. from 1,000 mm to 4,000 mm, preferably between 1,200 mm and 2,600 mm, in particular between 1,600 mm and 2,100 mm, and carries in its axial direction next to each other preferably several, z. B. four or six printing forms, wherein the respective subject of each printing form in each case a particular side of the printed product to be produced by the rotary printing press, z. As a newspaper is assigned. The transfer cylinder 04 is in its axial length to each cooperating with him form cylinder 06 customized. The transfer cylinder 04 and the respective form cylinder 06 may be the same in their respective scope ( 1 and 2 ) or the circumferential length of the forme cylinder 06 is about half the size of the associated transfer cylinder 04 , The in the 1 and 2 exemplified rotary printing press prints z. B. in an offset printing process, preferably in a dry offset printing process, ie in an offset printing process without using a dampening solution, which is why in the 1 and 2 illustrated printing units 03 each have no dampening system.

In the preferred embodiment, at least one, in particular each of the printing units 03 the printing unit 01 each a printing form magazine 08 on, wherein the respective printing forme magazine 08 each of the form cylinder 06 of the respective printing unit 03 assigned. Each printing forme magazine 08 has at least one storage position for storing at least one printing form, wherein the respective storage position is preferably realized in each case in a shaft or through a shaft, said shaft preferably a z. B. remote-controlled conveyor for supplying at least one new printing forme to form cylinder 06 having. Each printing forme magazine 08 preferably also has a shaft with a likewise preferably remote-controlled conveyor for discharging at least one used printing forme from the forme cylinder 06 on.

The printing plates are each by means of a respective form cylinder 06 arranged preferably remotely operable holding device, for. B. a clamping device, on the respective form cylinder 06 attached.

The holding device is z. B. pneumatically actuated and formed in a channel 11 of the respective forme cylinder 06 arranged, with this channel 11 in the axial direction of the relevant forme cylinder 06 extends.

The frame 12 the printing unit 01 exists z. B. from a lower and an upper horizontally arranged carrier and z. B. two between these two carriers preferably vertically arranged side frames, wherein the carrier and side frames z. B. to a printing unit 01 complementary, preferably self-contained framework. The lower support may be for the printing unit 01 be designed as their preferably substantially rectangular bottom plate, whereas the upper support for the printing unit 01 z. B. forms a cover plate. The one from this frame 12 enclosed printing unit 01 has at least two relatively mutually positionally variable frame parts 13 ; 14 on, with one of these frame parts 13 in the common frame 12 is preferably formed fixed position (in the 1 and 2 each z. B. the left frame part 13 ), whereas at least one other with the fixed position frame part 13 cooperating frame part 14 (in the 1 and 2 each z. B. the right frame part 14 ) in this common frame 12 z. B. parallel to the lower and the upper carrier along a preferably linear travel path S between two this travel S limiting endpoints bidirectionally movable, in particular movable is arranged. Due to the mobility of at least one of the interacting frame parts 13 ; 14 , which have a substantially rectangular base area, arise for these frame parts 13 ; 14 two different operating positions, these frame parts 13 ; 14 in a first operating position on a common, the printing unit 01 their height H and width B after passing joining surface 16 employed against each other ( 1 . 2 and 4 ) and in a second operating position are offset from each other ( 2 ). The second operating position of the movable frame part 14 is in the 2 indicated by dashed lines. The between the interacting frame parts 13 ; 14 existing common joining surface 16 is in the 1 exemplified in two outbreaks. The relatively mutually positionally adjustable frame parts 13 ; 14 are in their first operating position without a remaining gap 17 completely juxtaposed, wherein the at least one movable frame part 14 in this first operating position to protect against its unintentional movement, at least at the respective end point of the travel S preferably by a remote control can be locked. The joining surface formed in the first operating position 16 against each other employed frame parts 13 ; 14 falls z. B. with a transport plane through the printing unit 01 preferably vertically guided through paper web 02 together. In the second operating position are the relatively mutually positionally variable cooperating frame parts 13 ; 14 adjusted so that their respective, by the printing unit 01 passed through paper web 02 facing parallel sides. During the change from the first to the second operating position is preferably formed cuboid intermediate space 17 in its between the interacting rack parts 13 ; 14 existing width between a preferably zero value minimum value and a maximum value in the range of z. B. 1 m to 2 m changeable.

In the interacting rack parts 13 ; 14 is at least one in particular as a transfer cylinder 04 trained printing cylinder 04 stored, wherein the at least one in the one in the frame 12 z. B. positionally fixed frame part 13 stored printing cylinder 04 in the first operating position of these cooperating frame parts 13 ; 14 against the at least one in the other in the frame 12 z. B. positionally variable arranged frame part 14 stored printing cylinder 04 to form a common, the paper web 02 in particular double-sided printing pressure point is adjustable. In the second operating position, in which the two relatively mutually positionally variable frame parts 13 ; 14 are offset from each other, is between these two frame parts 13 ; 14 in the printing unit 01 especially within its frame, one of these frame parts 13 ; 14 partially limited space 17 formed, with this gap 17 for operators of the printing unit 01 at least then freely accessible and accessible, if that in the frame 12 Positionally adjustable arranged frame part 14 his arranged by the fixed position with the frame part 13 formed joining surface 16 has reached the farthest endpoint ( 2 ). The at least one movable frame part 14 is locked in its second operating position in particular at the relevant end point of the travel S to protect against its unintentional movement. In the preferred embodiment, in each of the cooperating rack parts 13 ; 14 in each case several, in particular four printing units 03 arranged. Each of the interacting rack parts 13 ; 14 , In particular, the movable frame part 14 , Has a mass of z. B. 30 tons and more.

At a control page 21 of at least one of the frame parts 13 ; 14 is z. B. a height-adjustable work platform 22 arranged to operators of the printing unit 01 an access to the upper printing units 03 this printing unit 01 to facilitate. The operating page 21 of the respective frame part 13 ; 14 is located at the from the transport plane by the printing unit 01 passed through paper web 02 opposite side. Additionally or alternatively, a height-adjustable and retractable in the bottom plate working platform 22 z. B. also in the of the cooperating frame parts 13 ; 14 partially limited space 17 arranged.

To carry out the movement of the mobile frame part 14 is this z. B. stored in a linear bearing and / or guided during its movement. To carry out the movement of the relatively mutually positionally adjustable frame parts 13 ; 14 is at least a first drive 23 provided, the at least one of the cooperating frame parts 13 ; 14 assigned to carry out a change from its one to its other operating position. As already described, is in the respective cooperating frame parts 13 ; 14 in each case at least one printing cylinder 04 stored, with at least a second drive 24 for carrying out a radial movement of the respective printing unit cylinder 04 is present, wherein the radial movement of the respective printing cylinder 04 in particular an orthogonal component to the joining surface 16 the frame parts 13 ; 14 having. The in the same frame part 13 ; 14 arranged printing cylinder 04 can from the respective second drive 24 in each case together or depending on the selection made to be moved radially individually.

Both drives 23 ; 24 have z. B. at least one acted upon by a pressure medium Working cylinder, wherein for reducing the effort required for a power supply preferably both drives 23 ; 24 as well as preferably also a closure system 26 for locking or locking the respective movable frame parts 13 ; 14 in their respective operating position, ie in particular at the respective end points of the relevant travel S, from a same energy storage 27 , in particular from a same hydraulic unit 27 with energy, eg. B. pressurized hydraulic oil, are supplied, so that for the two drives 23 ; 24 and optionally the closure system 26 for their respective power supply in the printing unit 01 only a single pipe system 19 is required ( 3 ). The hydraulic unit 27 has z. As a compressor or compressor or a pump. The power supply of at least one of the two drives 23 ; 24 as well as that of the closure system 26 is preferably remotely operable, z. B. at a preferably electronic control unit 28 , in particular from one to the printing unit 01 belonging control room 28 out, with the two drives 23 ; 24 as well as the closure system 26 each individually and independently operable. The hydraulic unit 27 acts on the power cylinders of the drives 23 ; 24 with a pressure of z. B. 100 bar to 500 bar. The on the same hydraulic unit 27 connected functional units such as the two drives 23 ; 24 as well as the closure system 26 be about z. B. on the same controllable, in particular from the control unit 28 controlled control 34 , z. B. valve 34 depressurized or pressurized, this valve 34 directly to the output of the hydraulic unit 27 assigned and before a pressure distributing to connected functional units branching the line system 19 is arranged ( 3 ).

Because of the gap 17 , which is located between the relatively positionally adjustable frame parts 13 ; 14 in its second operating position, for operating personnel of the printing unit 01 allows access, preferably even full-body access, in or at the printing unit 01 to protect an operator who the gap 17 enters or with one of their body parts in this space 17 could protrude, a safety device 18 provided ( 3 ) to prevent bodily injury, particularly crush injuries, when the movable frame member 14 through the z. B. from the control unit 28 activated first drive 23 in particular automatically, that is set programmatically in motion. So points the safety device 18 z. B. at least one more in the power supply in addition to the operation of the first drive 23 arranged, separately controlled control 29 , z. B. valve 29 on to z. B. in a line system 19 the power supply possibly occurring accident, z. B. circuit failure to prevent the movable frame part 14 against the fixed position arranged frame part 13 moves, causing one in the space 17 between the relatively mutually positionally variable frame parts 13 ; 14 could be endangered. Moreover, the safety device 18 preferably additionally at least one z. B. on the movable frame part 14 attached sensor 31 on, which in between the relatively positionally variable frame parts 13 ; 14 preferably parallelepiped-shaped and variable width space 17 a presence and / or movement of a non-printing unit 01 belonging body, ie in particular monitors the presence and / or movement of a person. The sensor 31 works preferably with electromagnetic waves, z. B. with light or microwaves (radar system), or ultrasonic waves and z. B. as a suitable for a room surveillance video optical camera or as a motion detector, wherein the motion detector z. B. is designed as a passive infrared detector. The trained as a camera or as a motion sensor sensor 31 can z. B. in or on the cover plate designed as the upper support of the frame 12 to be appropriate. A further variant provides that, in particular, the sensor designed as a camera or as a motion detector 31 preferably with the movable frame part 14 firmly connected, z. B. by means of one of this frame part 14 attached, the sensor 31 carrying support arm 36 , where the sensor 31 one in the gap 17 directed detection area 37 having ( 2 ). The sensor 31 is at least technically with the control unit 28 , in particular to the printing unit 01 belonging control room 28 connected. As soon as the sensor 31 in the gap 17 detects a presence and / or movement of a person during which the movable frame part 14 driving first drive 23 is actuated, becomes the first drive 23 about that on this drive 23 acting control 29 stopped immediately in its movement and, if necessary, reversed in its direction of movement. The movable frame part 14 can after the detection of a person staying in the danger area almost abruptly, z. B. within a travel S of less than 5 mm, by switching off, ie pressure-switching the first drive 23 and / or one of the control unit 28 triggered activation of a braking device to be brought to a standstill.

3 shows in a block diagram by way of example the interaction of the at least one sensor 31 , the control unit 28 , the controls 29 ; 34 , the energy storage 27 , the drives 23 ; 24 and the closure system 26 , The respective direction of action is indicated in each case by an arrow, in particular the sensor 31 and that in the pipe system 19 to the first drive 23 arranged control 29 the safety device 18 assigned. The control unit 28 checks the functional readiness and / or functionality of the sensor 31 preferably continuously. If the functional readiness and / or functionality of the sensor 31 is not given prevents the control unit 28 a release for introducing one of the movable frame part 14 to be performed movement or the movable frame part 14 driving first drive 23 is stopped by the control unit 28 with a corresponding control command z. B. on the energy storage 27 associated valve 34 and / or on the energy storage 27 itself acts, the latter variant in the 3 is indicated by a dashed effect arrow. In the absence of functional readiness and / or functionality of the sensor 31 can the control unit 28 also the movable frame part 14 locking locking system 26 actuate.

The 4 and 5 show in a simplified representation in each case a plan view of the in the 1 and 2 illustrated printing unit 01 with her in the frame 12 relative to each other positionally variable frame parts 13 ; 14 ,

In an advantageous embodiment, the at least one of the intermediate space 17 between the relatively mutually positionally variable frame parts 13 ; 14 monitoring sensor 31 z. B. one along the joining surface 16 effective directional characteristic 32 on that are within the gap 17 like a curtain preferably at a very small distance a in the range of z. B. a few millimeters to at most a few centimeters, in particular in front of the movable frame part 14 extends, one parallel to the travel S of the movable frame part 14 directed first opening angle of the directional characteristic 32 preferably much less open than a respective orthogonal second and / or a third opening angle of this directional characteristic 32 , wherein the second opening angle of the directional characteristic 32 in the axial direction of the at least one in the movable frame part 14 stored printing cylinder 04 and the third opening angle of the directional characteristic 32 in the direction of a height H of the movable frame part 14 are directed ( 2 ). The directional characteristic 32 is thus strongly concentrated at least in one spatial direction with respect to at least one of the two other orthogonal spatial directions, so that the directional characteristic 32 preferably on the movable frame part 14 flat along its joining surface 16 runs. The in the axial direction of the printing cylinder 04 directed second opening angle of the directional characteristic 32 and / or in the direction of the height H of the movable frame part 14 directed third opening angle of the directional characteristic 32 can each be using a z. B. optical system, in particular a lens system to be widened. The second opening angle of the directional characteristic 32 in the axial direction of the in the movable frame part 14 stored printing cylinder 04 is directed, can up to the height H of this frame part 14 be open, as well as in the direction of the height H of the movable frame part 14 directed third opening angle of the directional characteristic 32 over an entire in the axial direction of the in the movable frame part 14 stored printing cylinder 04 extending width B of the movable frame part 14 can be open ( 4 ). In a further embodiment, the at least one is the intermediate space 17 monitoring sensor 31 pivotally arranged, so that in this embodiment, preferably radially and thus narrow trained detection area 37 of the sensor 31 by a preferably periodic pivotal movement of this sensor 31 along between the relatively mutually positionally adjustable frame parts 13 ; 14 trained joining surface 16 runs, in this embodiment, the sensor 31 is preferably formed as at least one laser, wherein the laser is a small diameter beam of z. B. emits less than 2 mm and one by the pivotal movement of this sensor 31 Scanned scanning area scanned.

It is also advantageous to provide that with the sensor 31 connected control unit 28 depending on the operating positions of the cooperating frame parts 13 ; 14 this at least one preferably cuboid and in particular wide-variable space formed 17 monitoring sensor 31 activated and / or evaluates its signal. It is thus provided in particular that the control unit 28 the sensor 31 in a mutually directed movement of the relatively mutually positionally variable frame parts 13 ; 14 upon reaching a predetermined distance x between these frame parts 13 ; 14 mute, ie that the control unit 28 by a detection of a frame part 13 ; 14 does not interpret the signal generated as a disturbance and therefore also not a stop for the movement of the frame parts which can be changed in position relative to one another 13 ; 14 causes. The distance x at which the control unit 28 the sensor 31 mute switches, is selected larger than an opening width w of the directional characteristic 32 or the coverage area 37 of the sensor 31 , Wherein this opening width w parallel to the travel S of relatively mutually positionally variable frame parts 13 ; 14 is directed. The mute of the sensor 31 may alternatively or additionally also time-dependent, in particular as a function of a duration of at least one of the relatively mutually positionally variable frame parts 13 ; 14 carried out movement. In active, on-time, the sensor monitors 31 with its directional characteristic 32 or its coverage 37 the gap 17 preferably permanently.

Because after muting the sensor 31 there is a risk that in the remaining space 17 between the relatively mutually positionally variable frame parts 13 ; 14 in their successive movement directed to an operator z. B. is injured on their limbs when this in the space 17 protrude is the safety device 18 preferably to expand further components, wherein the control unit 28 These other components either earliest already with an onset of movement of the relatively mutually positionally variable frame parts 13 ; 14 and / or at the latest simultaneously with the muting of the sensor 31 activated. These further with the control unit 28 connected components preferably consist in an access control device 33 ( 3 ), which at least one z. B. on one longitudinal side of the printing unit 01 trained access to the after mute the sensor 31 remaining gap 17 controlled.

The access control device 33 can z. B. have one or more light barriers or one or more light grids, wherein the respective beam path of the light barriers or light grid z. B. directed horizontally or vertically. The access control device 33 can a control function z. B. over the entire height H at least of the movable frame part 14 or exercise H only over one or more parts of this height. The access control device 33 can z. B. as a near the bottom plate z. B. at a height h of up to 200 mm, preferably arranged about 100 mm, ie in the footwell of the gap 17 effective scanner 38 have, wherein the detection area 37 this scanner 38 essentially parallel to the longitudinal side of the printing unit 01 is directed, wherein at least one parallel to the longitudinal side of the printing unit 01 directed length l of this detection area 37 z. B. on the control unit 28 preferably variable in length is adjustable, said variable length l in particular in dependence on the positionally variable between the frame parts 13 ; 14 trained distance x is adjustable and set ( 2 ). The distance x is z. In the range of up to 2,000 mm. The bottom plate of between the relatively positionally variable frame parts 13 ; 14 trained gap 17 may also be occupied by a contact mat (not shown), which sends a signal to the control unit 28 gives up if one is in the gap 17 resident person is detected by their contact with the ground of the contact mat.

An additional or alternative embodiment of the access control device 33 can z. B. in at least one respectively in particular on the upper support of the frame 12 mounted, arranged from several juxtaposed sensors 41 existing sensor strip 39 each one of which on one longitudinal side of the printing unit 01 trained access to the between the positionally variable frame parts 13 ; 14 trained space 17 sensory z. B. by one of the sensors 41 the respective sensor bar 39 produced, preferably close-meshed grating, z. B. light grid monitors. The individual sensors 41 the respective sensor bar 39 are preferably dependent on the between the relatively mutually positionally adjustable frame parts 13 ; 14 trained distance x can be activated or switched off, so that the control unit 28 only the respective signal from such sensors 41 the sensor bar 39 is evaluated for the variable-width access to the gap 17 currently effective. All sensors 41 the respective sensor bar 39 are z. B. only during a printing process of the printing unit 01 off. The sensors 41 may each be as described above as a camera or as a motion detector or as a laser or as a radar system.

The access control device 33 can, as in the 5 illustrated, in addition to or as an alternative to one of the aforementioned embodiments, on at least one of the longitudinal sides of the printing unit 01 also a mechanical barrier 42 have, with this barrier 42 z. B. is designed in the form of a sliding door, wherein this on one of the frame parts 13 ; 14 attached, z. B. mounted in a rail sliding door along the longitudinal side of the printing unit 01 at least as a function of the movement of the relatively mutually positionally adjustable frame parts 13 ; 14 is displaceable, wherein the direction of movement in the 5 represented by a double arrow. The barrier 42 is in her the access to the space 17 obstructing operating state between the relatively positionally variable frame parts 13 ; 14 So formed wide variable. When access to the gap 17 between the relatively mutually positionally variable, mutually parked frame parts 13 ; 14 is to be closed off, the on one of the frame parts 13 ; 14 attached sliding door with the other one 13 ; 14 connected by sliding the door there into a lock 43 is hung. The castle 43 has a z. B. electrical contact switch, which sends a signal to the control unit 28 sends and thus the executed closure of the relevant access to the gap 17 between the relatively mutually positionally variable, mutually parked frame parts 13 ; 14 reports. Thereafter, a preferably in the bottom plate of the printing unit 01 retractable, can be erected from this base plate test equipment 44 , z. B. a slider 44 at least in the footwell of the gap 17 placed and then along the width B of the printing unit 01 through the gap 17 to be moved through, which is in the 5 is indicated by a movement arrow to check that neither a person nor other objects such as left tools or the like after the effectiveness of the barrier 42 still in the gap 17 are located. The slider 44 points to his in the gap 17 directed side z. B. at least one contact switch 46 on, with which a contact with one is still in the interspace 17 person or with an object is detectable. Alternatively, this test can also contact, z. B. with optical means such. B. with the trained as a camera sensor 31 be performed. After making sure that neither a person nor any other objects are in the gap 17 are located, a release signal is sent to the control unit 28 , whereupon the control unit 28 the first drive 23 sets in motion, whereby the relatively mutually positionally variable, mutually parked frame parts 13 ; 14 along their travel S are moved towards each other, causing the gap 17 in its width to its minimum value, preferably reduced to zero. That in the pipe system 19 for power supply of the first drive 23 arranged control 29 can from the control unit 28 so that depending on the signal of the gap 17 monitoring test facility 44 and / or the barrier 42 be controlled.

The access control device 33 can be at the respective access to the gap 17 permanently or temporarily present. At least part of the access control device 33 may have a rest position and a working position, wherein in the rest position, the corresponding part of the access control device 33 has been mechanically covered or moved to a protected position to protect it from contamination or damage. The at least one the gap 17 monitoring sensor 31 and the access control device 33 be from the control unit 28 z. B. alternately depending on the respective operating position of at least the movable frame part 14 switched active. As described above, the control unit stops 28 immediately the movable frame part 14 in its movement in the event that the sensor 31 and / or the access control device 33 a presence and / or movement of a non-printing unit 01 belonging body, in particular an operator to detect, which is in one of a movement of the movable frame part 14 resulting danger zone of the printing unit 01 stop them.

A further improvement of the safety device 18 is that with the at least one sensor 31 to be monitored, between the relatively mutually positionally variable frame parts 13 ; 14 trained space 17 a warning area 47 is upstream, in particular the longitudinal side to the printing unit 01 extending warning area 47 either from a dedicated sensor 48 ( 4 ) and / or from the gap 17 monitoring sensor 31 is detected, wherein the gap 17 monitoring sensor 31 in this case, the space 17 outstanding coverage 37 having. The with at least one of the sensors 31 ; 48 connected control unit 28 does not depend on the presence and / or movement of one to the printing unit 01 belonging body in the warning area 47 at the cooperating frame parts 13 ; 14 a change from their one to their other operating position or stop such a movement already initiated, if there is a risk. Monitoring the warning area 47 causes the control unit 28 the safety device 18 and / or the drives 23 ; 24 and / or the closure system 26 can cause an early reaction whenever a person is in a self-endangering manner of the printing unit 01 or at least one of the moving frame parts 13 ; 14 approaches. The specially only the warning area 47 monitoring sensor 48 is z. B. as well as the gap 17 monitoring sensor 31 as a camera or as a motion detector or as a laser or as a radar system and works z. B. with electromagnetic waves, z. As light or radar, or with ultrasonic waves. The the warning area 47 monitoring sensor 48 can be a directional characteristic 32 or a detection area 37 have, with which or with which he the between the position changeable relative to each other frame parts 13 ; 14 trained space 17 upstream warning area 47 monitored in a substantially oval or elliptical cross-section. Another embodiment of the warning area 47 monitoring sensor 48 can in one in the warning area 47 protruding arrangement of at least one of these sensors 48 exist, wherein preferably several of these sensors 48 are arranged in particular tightly arranged in a row. The sensor 48 is preferably on the movable frame part 14 arranged, z. B. in the area of this frame part 14 belonging cover plate, wherein the directional characteristic 32 or the coverage area 37 this sensor 48 in particular, is directed vertically downwards, so that this sensor 48 detects a person or an object which is at the space 17 facing side of the movable frame part 14 through the length of the printing unit 01 extending access to this gap 17 moved into it ( 4 ). A mesh size m between the respective directional characteristic 32 or the respective coverage area 37 the same warning area 47 monitoring sensors 48 is z. B. only a few millimeters, in particular less than 20 mm, preferably between 8 mm and 15 mm. The one warning area 47 monitoring sensor 48 is at a distance y of z. B. less than 20 mm, preferably between 8 mm and 15 mm, of one at the joint 16 trained, z. B. vertical edge 49 the movable frame part 14 arranged away. The warning area 47 points with respect to the longitudinal side of the printing unit 01 extending in the direction of the width B depth t of z. B. 500 mm to 1,000 mm.

The aforementioned embodiments for monitoring the gap 17 and / or the warning area 47 are each also combined with each other executable. For example, on at least one side of one of the cooperating frame parts 13 ; 14 an extending in the direction of the width B, permanently or temporarily provided grid 51 (in 4 shown in dashed lines), on which in turn at a lateral distance z from the respective longitudinal side of the printing unit 01 a mechanical or non-contact barrier 42 arranged according to the examples described above. The distance z corresponds to z. B. the depth t of the warning area 47 ,

LIST OF REFERENCE NUMBERS

01

printing unit

02

Substrate, paper web

03

printing unit

04

Printing cylinder, transfer cylinder

05

06

form cylinder

07

Inking unit, short inking unit

08

Printing forme magazine

09

ink reservoir

10

11

channel

12

frame

13

frame part

14

frame part

15

16

joining surface

17

gap

18

safety device

19

line system

20

21

operating side

22

platform

23

Drive, first

24

Drive, second

25

26

locking system

27

Energy storage, hydraulic unit

28

Control unit, control room

29

Control, valve

30

31

sensor

32

directivity

33

Access control device

34

Control, valve

35

36

Beam

37

detection range

38

scanner

39

sensor bar

40

41

sensor

42

Abschrankung

43

lock

44

Testing device, slide

45

46

contact switch

47

warning area

48

sensor

49

edge

50

51

grid

B

width

H

height

S

Travel Range

a

distance

H

height

m

mesh

t

depth

w

opening width

y

distance

x

distance

z

distance

Claims (9)

Printing unit of a printing press with at least two frame parts which can be changed in position relative to each other ( 13 ; 14 ), whereby cooperating frame parts ( 13 ; 14 ) in a first operating position at a common joint surface ( 16 ) are set against each other and parked in a second operating position, wherein between the mutually parked frame parts ( 13 ; 14 ) in the printing unit ( 01 ) one of these frame parts ( 13 ; 14 ) partially limited space ( 17 ) is formed, wherein at an access to the space ( 17 ) an access control device ( 33 ), the access control device ( 33 ) - at least one first sensor ( 41 ) depending on a between the relatively mutually positionally adjustable frame parts ( 13 ; 14 ) formed distance (x) can be activated or switched off, and - at least one second sensor ( 38 ), in dependence on the between the relatively positionally variable frame parts ( 13 ; 14 ) formed distance (x) in a length (l) of a detection range ( 37 ), at least one third sensor ( 31 ) in the space ( 17 ) presence and / or movement of a non-printing unit ( 01 ) is monitored. Printing unit according to claim 1, characterized in that the access control device ( 33 ) several in a sensor bar ( 39 ) arranged first sensors ( 41 ) having. Printing unit according to claim 2, characterized in that the plurality of first sensors ( 41 ) with their respective coverage ( 37 ) form a grid with which the access to the space ( 17 ) is monitorable. Printing unit according to claim 2, characterized in that all sensors ( 31 ; 38 ; 41 ) in each case a signal to a control unit ( 28 ), the control unit ( 28 ) only the respective signal from those of the first sensors ( 41 ), which is responsible for the variable access to the space ( 17 ) are currently effective. Printing unit according to claim 2, characterized in that all of the first and second sensors ( 38 ; 41 ) only during a printing process of the printing unit ( 01 ) are switched off. Printing unit according to claim 1, characterized in that the at least one second sensor ( 38 ) at a height (h) of up to 200 mm above a bottom plate of the printing unit ( 01 ) is arranged. Printing unit according to claim 1, characterized in that the detection area ( 37 ) of the at least one second sensor ( 38 ) parallel to the longitudinal side of the printing unit ( 01 ), wherein at least the parallel to the longitudinal side of the printing unit ( 01 ) directed length (l) of this detection area ( 37 ) variable in length is adjustable. Printing unit according to claim 1, characterized in that the distance (x) is in the range of up to 2,000 mm. Printing unit according to at least one of the preceding claims, characterized in that the at least one first and second sensors ( 38 ; 41 ) of the access control device ( 33 ) and / or the at least one the space ( 17 ) monitoring third sensor ( 31 ) are each formed as a camera or as a motion detector or as a laser or as a scanner or as a radar system or are.

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