EP0881075B1 - Printing press with a motor-driven element - Google Patents

Abstract

The operating unit (2) may be used by the operative for the operation of a motor-powered section of a printing press, and especially a sheet offset press. The operating unit may be fitted to the moving section (1). When the operating unit is activated, a control (S) generates preset movement commands for the drive (3) to move the section in a set pattern. An evaluation unit (A) determines the nature of the movement actions required from the operating unit, to set the action of the control (S) accordingly.

Description

The invention relates to a printing press a motor-driven element according to the preamble of claim 1.

In printing machines and in particular sheetfed offset printing machines are one A variety of motor-driven elements are provided, as an example for this protection devices, on the sheet format or the type of printing material adjustable sheet guiding or braking devices or the Stacks in the delivery arm or stack-carrying plates are to be mentioned. The Elements mentioned here only as examples can be actuated via assigned actuators, i.e. an operator can use assigned actuators move these elements. In the case of motor-adjustable protection devices this means that the protection element at the push of a button move from a basic position to a position that opens the contamination point can be. The actuator assigned to this element for protection (Motor) is also connected to the electrical pollution via the assigned control connected to the machine, so that in the open position of the protective element accordingly only limited run commands can be triggered are.

Large-scale contamination elements are currently being used in sheet-fed offset printing machines provided with motor-driven adjustment devices, since these devices otherwise only very cumbersome to use in the sense of high effort would be. The advantage of a purely manual handling of a pollution element can be seen in the fact that the operator of this element operated intuitively, i.e. the operator actuates this element on an associated one Handle in a manner that does not require explanation. With pollution elements, which by actuators to be activated by the operator to be moved, on the other hand, actuation buttons or such devices can be provided via which the corresponding Commands for opening or closing the protection element can be initiated are. These actuators (control buttons) are usually included symbolism adapted to the assigned function, but it will often perceived as cumbersome, a freely movable in a certain area and also positionable protection element by multiple Tapping an assigned control button to move to a designated position.

The problem briefly described above in the process and positioning of pollution elements arises in an analogous manner in the process for example of stack support plates of the feeder or delivery of sheetfed offset printing machines. In normal printing press operation, these are stacked support plates via assigned drive motors of the increasing or decreasing stack height proceed accordingly. For changing the stack or stack pallets However, the stack support plates must be moved to the basic position on the floor become. In this case, an operator initially has a corresponding one Select operating mode, whereupon by activating the assigned Operating button the stacking support plate can be moved into the intended position. Also here the assigned controls with symbols and / or representable Text information must be provided for easy and safe handling to ensure the corresponding element.

By operating elements arranged far from the element to be moved A positioning process is often very complex because of the operating position the desired position can often only be determined visually. Hence also arise in this case cumbersome back and forth travel processes, i.e. the corresponding one Adjustment process is time consuming.

From US-A-5525880 a pressure actuated exit door is known in which the actuation an element of the door opens or closes the door.

The object of the present invention is therefore a printing press, in particular a sheet-fed offset printing press, with a motor-driven element according to to expand the preamble of claim 1 such that a simple and safe operability is guaranteed.

This object is achieved by the characterizing features of claim 1. Further developments of the invention result from the subclaims.

According to the invention it is provided that the motor-driven element assigned control element, via which the operator the desired Initiates travel processes, is attached directly to the moving element, i.e. With this is moved. According to a preferred embodiment of the invention it can be a movable handle, which is preferably equipped with a force sensor detects the type and strength of the actuation and the corresponding ones via an evaluation unit downstream of the force sensor Control commands for the drive of the movable element generated. Means such a control element, which is preferably designed as a movable handle it is then possible, for example, a stack support plate in for a Position the operator intuitively in a simple manner to the desired height. By the force sensor, the operator opens the handle the movable element is exerted force and in corresponding control commands converted for the drive motor. It can be motorized for certain activatable elements are provided that are large by the operator force exerted on the movable element automatically increases the Drive power of the assigned motor leads, i.e. the one executed by the element Movement is accelerated accordingly or the drive power is increased reinforced while maintaining a predetermined maximum speed.

The present invention can not only be used for protection elements or applied to stack support plates of the feeder / delivery of sheetfed offset presses but can only be done manually at a variety of cumbersome Way remotely adjustable elements are used. For example vertically adjustable sliding protection (in front of the printing unit cylinders) can by a swiveling handle with force sensor the operation of an operator capture and by generating appropriate control commands effect the movement of the element via the assigned drive. Here can be provided that the operator by the way of actuation of the handle the travel speed of the protective element in predetermined Limits may vary. A simple actuation can be a slow movement, more pressing a higher moving speed effect via the assigned drive. The specified travel speeds depend on the type of the driven pollution element and are chosen such that it is due to the travel operations cannot lead to situations endangering people.

According to a further development of the invention, it can be provided that the activated travel process only while operating the appropriately trained Control element (e.g. swiveling handle). In one In this case, an operator must remove the protective element from the closed one Move the position to the desired open position and stop there offset. Conversely, the opened pollution element would then be over the swivel-mounted handle with a force sensor from the open position to the closing position securing a danger point move. Further training can also be provided that certain Elements by appropriately deflecting the handle or otherwise trained control element only an activation command will, i.e. for example, the operator only steers the handle into a normal position a certain end position, whereupon the element (protection) automatically moves to the specified end position (e.g. closed position). In this case then additional safety devices are assigned to the movable element, by which it is avoided that during the travel process too Contusions or other injuries. Here can accordingly arranged light barriers or known and switching on deflection Protection elements are used (foldable strips with limit switches or the like).

According to another embodiment of the invention it can be provided that the stack support plate of the feeder and / or delivery arm of the sheet-fed offset printing machine has a handle designed in the manner explained above, through which an operator then the stack support plate within predetermined Height position can move. Here too there is preferably one Force sensor use, by which the type and strength of the deflection this control element is detectable and then the movement of the Stack support plate can be varied within predetermined speed limits.

In addition to the stack support plates or protection elements mentioned above (e.g. sliding guards) can also be moved by other motors Elements straight in a sheet-fed offset printing press using the invention motorized adjustable. As an example here would be the Elements to be set in the sheet format in the feeder and / or delivery of the sheet printing machine to call. For example, the suction head on the feeder A corresponding printing press and the deflection via sensor means have detecting control element, through which this device of an operator in an intuitively simple way to the desired sheet format or can adjust the necessary height. Also for those to be set to the sheet format Stops or bow brakes, the invention is applicable. Corresponding the element to be adjusted can be handled by the operator Control element as a handle, as a to be moved in the direction of movement Ring, designed as a lever to be pivoted, as a button to be pressed his. The sensor system assigned to the control element, that of the sensor system downstream evaluation device and those generated by the evaluation device Control commands for driving the element are in the for a simple Usability trained way. As above several times indicated it can be force sensors through which the The strength of the deflection, for example of a handle, can be detected as an operating element and via which the evaluation unit connected downstream of the sensors then Control commands for a faster / slower procedure of the Element or for moving the element at a constant speed however with additional drive power (overcoming resistances or the weight of the element) can be generated. This can be provided be the breakaway torque of the element to be adjusted by the drive generate so that the operator then only a minimal force to move of the element

Furthermore, an embodiment of the invention is explained based on the drawing. This shows a motorized sliding protection with a sensor that detects the actuation of the handle.

According to the exemplary embodiment shown, the motor-driven element is formed as a vertically movable slide protection 1, which is not in front of a further illustrated danger point, for example a printing unit Printing machine is arranged. This known slide protection 1 can vertical by an operator in the manner explained below be moved, i.e. from, for example, a lower one that safeguards the danger point Position in an upper and in particular also selectable position be moved.

The sliding protection 1 as the motor-driven element has on its lower End of a handle 2 that can be handled by the operator, which has a Swivel joint is connected to the slide protection 1. The direction of movement of the Slip protection 1 is by the double arrow, the pivotable movement of the Handle 2 marked relative to the slide protection 1 by the curved double arrow.

The slide protection 1 can be moved by a motor via an associated drive 3, the transmission elements to be provided between the drive 3 and the sliding protection 1 for example in the form of traction means, chains or the like. Not shown are. The drive 3 can be, for example, an electric motor act that moves the slide protection 1 via traction means (chains), it can but also act as a pneumatic cylinder that can be operated with compressed air which the sliding protection in by appropriate pressure medium is movable in a predetermined manner. A control S is arranged upstream of the drive 3, via which the corresponding signal and / or pressure medium application of the drive 3 for moving the sliding protection 1 in a predetermined manner.

The pivotally mounted with respect to the slide protection 1 handle 2 is a Assigned to sensor 4, by means of which one is caused by an operator Operation of the handle 2 is detectable. With sensor 4 it can are preferably a force sensor through which the strength the deflection of the handle 2 relative to the slide protection 1 can be determined.

It can be provided that the handle 2 over the above Swivel joint is pivotally mounted with respect to the slide protection 1 and the handle 2 spring means are assigned such that the handle 2 in actuation-free state a basic position - for example at right angles to Slip protection 1 - occupies. The sensor 4 is then preferably used as a distance measuring system formed by which the deflection of the handle 2nd Corresponding signals can be generated relative to the basic position. The sensor 4 but can also be used as a force sensor, for example in the form of a strain gauge be formed by which with appropriate storage the handle 2 relative to the slide protection 1 both the operation of the handle 2 and the strength of this actuation can be determined.

An evaluation unit A is connected downstream of the sensor 4, through which the signals of the sensor 4 detectable and corresponding signals for the control S for the drive 3 are convertible. Thus, the sensor 4 through the evaluation unit A can be determined whether and in which direction the handle 2 relative to Slip protection 1 is moved, with the evaluation unit A when swinging up the handle 2 of the drive 3 for raising the sliding protection 1 is controlled. Accordingly, the drive 3 is activated when Swiveling the handle 2 down in such a way that the sliding protection 1, for example is moved down at a predetermined speed. At a simple embodiment of the invention can be provided that by the sensor 4 only detects the actuation of the handle and then by the evaluation unit A signals to form control commands can be generated by the control S for the drive 3. With further training the invention provides for the sensor 4 in connection with the storage of the Handle 2 relative to the anti-skid 1 so that the an operator exerted force in a certain direction on the handle 2 and thus the sliding protection 1 ascertainable and for the generation of corresponding Control commands can be processed by evaluation unit A and controller S. is.

As already indicated above, the handle 2 can be moved in by spring means a basic position can be held relative to the slide protection 1. As a result a corresponding upward or downward handling of an operator a swinging up or down of the handle 2 relative to the slide protection 1 cause, the size (swivel angle) of the movement of the handle a measure of the one exerted by the operator on the slide protection 1 Strength is. By appropriate design of the sensor 4 can be this size of the deflection of the handle 2 and thus that of the operator determine the operating force exerted on the slide protection 1, so that then Drive 3 of the slide protection via evaluation unit A and control S 1 can be controlled within a predeterminable speed range. The Activation takes place with the proviso that the one to be applied by the operator Operating force while maintaining the specified speed range (Maximum speed) is not exceeded. The operator has thereby the impression of adjusting the element to be adjusted "by hand". Abstract Thinking and operating processes to achieve the desired result (Positioning process) are not required. Through the formation of control signals by the evaluation unit A and the controller S depending on the signals of the Sensor 4, it is possible to almost all weight and other frictional forces, which counter movement of the element to be adjusted act to compensate, i.e. by the operator is only a small one to apply remaining strength.

Reference list

1

Sliding protection

2nd

Handle

3rd

drive

4th

sensor

S

control

A

Evaluation unit

Claims (7)

1. Printing press, particularly an offset sheet printing press, with at least one movable element (1) which can be moved by motor via an appropriate drive (3) together with a prior arranged control (S), as well as an actuation device (2) which can be activated by an operative which is operationally connected with the control (S) of the drive (3), characterised in that the actuation device (2) which is to be activated by the operative is fixed to the element (1) to he moved, that during the activation of the actuation device (2) via the control (S) preset movement commands for the drive (3) can be generated to shift the element (1) in predetermined fashion and that via the drive (3) the movable element (1) is movable with a speed corresponding to the force exerted by the operative via the actuation device (2) on the movable element (1).
2. Printing press according to Claim 1, characterised in that the actuation device (2) which can be activated by an operative has connected downstream an evaluation unit (A) by which the type and form of activation of the actuation device (2) can be determined and can be converted by the control (S) into preset movement commands for the drive (3).
3. Printing press according to Claim 1 or 2, characterised in that the actuation device (2) which can be activated by the operative is a hand grip (2) fixed to the movable element (1).
4. Printing press according to Claim 3, characterised in that the hand grip (2) is fitted movably with respect to the element (1) to be moved whereby a movement of the hand grip (2) called for by the operative can be detected via an evaluation unit (A) and is convertible by the control (S) into predetermined movement commands for the drive (3).
5. Printing press according to one of the preceding Claims, characterised in that the actuation device (2) which can be activated by the operative is fitted with a sensor (4) by means of which the force exerted by the operative via the actuation device (2) on the movable element (1) can be determined and is convertible via an evaluation unit (A) and the control (S) into corresponding movement commands for the drive (3).
6. Printing press according to one of the preceding Claims, characterised in that the movable element is constructed as a sliding protection (1).
7. Printing press according to one of Claims 1-5, characterised in that the movable element (1) is constructed as a pile carrier plate of a feeder or delivery of a sheet treating printing press.

Images