DD204685A1 - DEVICE FOR MEASURING MEASUREMENTS ON ARC- AND TRAIN- AND PROCESSING MACHINES - Google Patents

Abstract

D. Invention relates to a device for measuring value recording on sheet and web, loading and processing machines, in particular for the purpose of determining the position of sheets and / or webs. The aim of the invention is to provide a device for measured value recording for determining the position of moving objects, which d with a low circuit complexity. Genesis of v. Waste paper prevented. D. Task is d. Setup for measured value recording so that a measurement without additional applied non-reflective layers is possible, as well as a smaller from simpler technical means existing transducer is required. The problem is solved in that in the device of the transducer outside the plane of movement of the measurement object arranged on a Fuehrungselement and this is attached to a serving for movement on a curved path drive element, and that serving to scan the edges to be detected energy source outside the plane of motion is attached, in addition, that the transducer upstream of an evaluation. Speed measurements are also possible with this device.

Description

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Device for recording measured values on sheetfed and web, be and processing machines

Field of application of the invention

The invention relates to a device for recording data on sheet and web, loading and processing machines, in particular for the purpose of determining the position of sheets and / or webs.

Characteristic of the known technical solutions

It is known from DD-PS 141.148 a device for testing the sheet course of a sheet feeder with the early and late bow and oblique and lateral offset sheets are determined. For this purpose, the back corner corners of test sheets are covered at 45 ° with a non-reflective layer. In the region of the traversed by the rear corners of the sheet path photoelectric, connected to an evaluation unit, scanning means are arranged, which detect a position exceeding a predetermined amount addition.

The disadvantage of this device is that these measurements can only be made on the test sheet. The direct determination of the position of the normal sheets during transport through the machine is not possible because no non-reflective layer is applied to them. This has the consequence that the relocated sheets become waste paper. Furthermore, facilities are known which have the purpose of detecting the misplacement surface diodes. As a result, measurements during the transport of the sheets and / or sheets are possible. However, have

22FEH 1533 * 070742

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These arrangements have the disadvantage that a high circuit complexity for driving the individual diodes and the power supply is required.

Aim of the invention

It is the object of the invention to provide a device for measured value recording for the position determination of moving objects, which prevents the formation of waste with little circuit complexity.

Billing the essence of the invention

The object of the invention is to make the device for measured value recording so that a measurement without additionally applied non-reflective layers is possible and a smaller from simpler technical means existing transducer is required.

The object is achieved in that arranged in the device of the transducer outside the plane of movement of the object to be measured on a guide element and this is attached to a serving for movement on a curved path drive element, and that serving for scanning the edges to be detected energy source outside the plane of motion is attached, in addition, that the transducer upstream of an evaluation is.

To obtain digital measured values, it is advantageous if a partially translucent scale body with an optical lens system is arranged in the transducer between the plane of movement and the transducer.

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For a simple design of a circular movement of the guide element, it is advantageous if the arrangement of the guide element to the drive element consists of a lever arm attached to the rotor of a motor.

The transducer preferably consists of a light guide cable arranged on the guide element and a photodetector attached to the light exit point. Effectively, the energy source is characterized in that a parallel to the edge to be measured band radiator is arranged as an energy source. The evaluation device is effectively designed such that a microcomputer is arranged downstream of a digital electronic memory in the evaluation device and a clock device assigned to it for generating the machine cycle.

embodiment

The invention will be explained in more detail with reference to an exemplary embodiment. The drawing shows in

Fig. 1: the side view of the device and Fig. 2: the top view of the device.

In the exemplary arrangement of the Meßwertaufnahmeeinrichtung on a translucent substrate web 1, a light source 2 is arranged below this, which sends its light rays through the printing substrate 1 and arranged above the printing substrate 1 scale body 3 to a light receiver 5. This light receiver 5 is located at one end of a lever arm 4, whose opposite end is connected to the rotor of a motor 6. By the motor 6, the light receiver 5 is moved in a circle over the substrate 7. Does the substrate 7 during its transport under the scale body

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and thus in the beam path of the light source 2, the light receiver 5 receives the amount of light energy that is not absorbed by the substrate 7 according to its current position. To obtain digital electrical signals, a graduation mark 8, which consists of equidistant black lines, is mounted on the translucent scale body 3. The analogue light signal is interrupted by the absorption of the light at the line markings. During the scanning of the scale mark 8 by the light receiver 5, the corresponding position of the printing material 7 is detected by the respective number of digital signals. If the printing material 7 is transported at only one speed, then this can be taken into account by a non-linear scale mark 8. If different transport speeds are available, they will be included in the following evaluation. In order to achieve a higher resolution, the enlarged image of the printing material edge is projected onto the graduation mark 8 with the aid of a lens system. The difficult transmission of the signals from the rotating part to the stationary part of the device is made so that the light energy is conducted by means of optical fiber cable to the fixed light receiver. The end of the co-rotating Lichtleitkabels is arranged in the axis of rotation axis centered with respect to the fixed in the same axis of rotation light receiver.

To simplify the triggering of the measuring time, it is favorable when the lever arm 4 is moved in the form of a reciprocating movement along a curve piece.

The application of this Meßwertaufnahmeeinrichtung is further applicable to the signed determination of the speed, the side edge control, Rollendurchmesserabtastung and Schiefbogenkontrolle.

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By increasing the speed of the lever arm 4, the accuracy of the measurements is increased.

Compared with the use of known surface diodes, the invention raises the thermal and mechanical stability of such devices.

By means of a subsequent evaluation device, the digital measured values obtained can be stored in a memory in a memory and evaluated by a subsequent microcomputer, and a control signal for actuators can be generated in accordance with the evaluation in the event of deviation from a desired value. As energy sources also infrared emitters, ultrasonic emitters, hydraulic, pneumatic and electromagnetic transmitters are applicable except light emitter.

The device is also suitable for determining the instantaneous position of moving machine parts in addition to the application for determining the position of sheets and / or webs.

Claims (6)

^ 238483 5 invention claim 1. A device for measured value recording on sheet and train, besowie processing machines with a position of the sheets and / or webs during transport through the machine detecting transducer and the device downstream evaluation, characterized in that in 4er device of the transducer outside the movement plane of the measurement object is arranged on a guide element and this is attached to a serving for movement on a curved path drive element s, and that a serving for scanning the edges to be detected energy source is mounted outside the plane of movement, also that the transducer upstream of an evaluation. 2. Device for measured value recording according to item 1, characterized in that between the plane of movement and the transducer, a partially translucent scale body (3) is arranged with an optical lens system. 3. Device for measured value recording according to item 1, characterized in that the arrangement of the guide element to the drive element consists of a to the rotor of a motor (6) fixed lever arm (4). 4. means for measured value recording according to item 1 and 2, characterized in that the transducer consists of a arranged on the guide element light guide cable and attached to the light exit point photodetector. 5. A device for measured value recording according to item 1, characterized in that a parallel to the edge to be measured band radiator is arranged as an energy source '238483 5 6. Device ζμτ measured value recording according to item 1, characterized in that a microcomputer is arranged downstream in the evaluation of a digital electronic memory and a associated thereto for generating the machine cycle clock means. For this 1 page drawings.