CN209887782U

CN209887782U - Monitoring device and continuous-operation press

Info

Publication number: CN209887782U
Application number: CN201820696031.9U
Authority: CN
Inventors: F·诺尔泽; F·海曼斯
Original assignee: DIEFFENBACHER ENGINEERING GmbH
Current assignee: DIEFFENBACHER ENGINEERING GmbH
Priority date: 2017-05-11
Filing date: 2018-05-10
Publication date: 2020-01-03
Anticipated expiration: 2028-05-10
Also published as: CN108858651A; CN108858651B; DE102017110301A1

Abstract

The utility model relates to a monitoring facilities and continuous operation formula press, this press are used for producing the clamp plate. At least one spatial region through which at least one component and/or component type normally passes is acquired as a two-dimensional optical image by means of at least one optical detector. At least one actual state of at least one defined image portion of the image is compared with a predefinable setpoint state. If the at least one actual state deviates from the setpoint state by more than a predefined limit, at least one warning is generated. In this way, deviations of at least one component or component type of the clothing strip from its predefined state, in particular from its predefined position, can be better detected.

Description

Monitoring device and continuous-operation press

Technical Field

The present invention relates to a monitoring device for at least one component and/or component type of a runner blanket of a continuously operating press for producing press plates, in particular for producing material plates, such as particle, fiber, straw and particle boards and plastic boards, from wood and/or other regenerated agricultural products.

Furthermore, the invention relates to a continuously operating press for producing press plates, in particular for producing material plates, such as particle, fiber, straw and particle boards and plastic plates, from wood and/or other recycled agricultural products, wherein the press has at least one runner blanket and a monitoring device for at least one component and/or component type of the at least one runner blanket.

Background

A continuously operating press for producing material plates or material mats is known from DE 202014104140U 1, which press comprises at least a lower press table with a lower press platen/heating platen and an upper press bar with an upper press platen/heating platen, which both form an adjustable press gap. Two belts are provided which circulate endlessly around the press table and the hold-down strip for pressing the material along the press section in the press nip. The belt is mounted movably relative to the support of the press table or press bar by means of endless circulating rolling body blankets. The rolling body blanket is formed by a plurality of rolling bodies arranged with their axial direction transversely to the belt running direction, which are connected by axially arranged rods to a guide chain arranged outside the press gap. In the event of an axial deviation of the rolling bodies from a predetermined desired range, a device for introducing an axial restoring force directly into the rolling bodies is arranged between the rolling bodies and the guide chain. Sensors for determining the pressure acting on the rolling elements and/or a unit for detecting the course of the rolling elements are arranged on the press.

SUMMERY OF THE UTILITY MODEL

The object of the invention is to provide a method, a monitoring device and a continuously operating press of the type mentioned above, in which deviations of at least one component or component type of a clothing strip from its predefined state, in particular from its predefined position, can be better detected.

This object is achieved in the method according to the invention in that at least one spatial region through which at least one component and/or component type normally passes is recorded as a two-dimensional optical image by means of at least one optical detector, at least one actual state of at least one defined image section of the image is compared with a predefinable theoretical state, and at least one warning is generated if a possible deviation of the at least one actual state from the theoretical state exceeds a predefined limit level.

Thus, according to the invention, at least one spatial region, which contains at least one component and/or component type under normal conditions, i.e. without interfering operation, is simultaneously and rapidly acquired as a two-dimensional optical image. In this way, a corresponding snapshot of a larger spatial area may also be generated in the case of a fast running ticker carpet. One or more image portions are defined in the acquired image, in which or in which the respective actual states are compared with the respective predefined theoretical states.

By only having to analyze a defined image portion, rather than the entire image, the comparison may be performed correspondingly more quickly. This enables reliable monitoring of the clothing strip even at high operating speeds.

If at least one of the actual states deviates from the corresponding predefined setpoint state by more than a predefined extent, a corresponding warning is generated. The corresponding tolerance can be defined by a predetermined limit size of the deviation.

The alarm can be used correspondingly for reprocessing. The function of the press and/or the function of the at least one detector can thus be influenced in particular on the basis of the alarm and/or an optical and/or acoustic warning signal can be output.

Advantageously, the at least one detector may be arranged at a significant distance from the clothing strip, in particular at a distance of at least 1.5m, preferably about 2 m. In this way, the influence of operating conditions in the area of the roller carpet, in particular heat, contamination, humidity, vibrations or the like, on the at least one detector can be reduced.

In this way, the cooling device can in particular use a liquid and/or gaseous cooling medium, in particular air, water or nitrogen, and/or Peltier cooling (Peltier ü hlung) or other suitable cooling devices.

Advantageously, the at least one detector may be protected from contamination, in particular dust, oil, moisture or the like. The at least one detector can be arranged for this purpose in a housing which is closed in particular. The housing may advantageously have at least one window through which the clothing strip may be known by means of a detector. A cleaning system, in particular a wiping device, can be provided for the at least one window in order to remove contaminants which may occur during operation.

Advantageously, the housing of the detector can be loaded with a small overpressure. In this way, dirt and moisture penetration can be better avoided. The housing can also be flowed through by a gas, in particular air. This allows the penetrating dirt or moisture to be substantially removed from the housing. Temperature regulation, in particular cooling, can also be improved thereby. With the described device, moisture condensation, in particular in the window region and/or in the lens and/or in the sensor of the detector, can also be better counteracted.

Advantageously, the monitoring device can have at least one light source. By means of the at least one light source, a region of the space to be monitored can be illuminated. In this way, the contrast can be enlarged, so that at least one component or component type can be better and more precisely known.

Advantageously, the frequency range of the light source and the frequency range in which the detector operates are matched to one another. In this way, a better acquisition accuracy can be achieved correspondingly.

The spatial region to be monitored can be illuminated directly by means of at least one light source. Alternatively, the spatial region to be monitored may be illuminated indirectly, for example by means of a mirror, a light guide or the like. In this way, the at least one light source may be arranged more flexibly, also at a greater distance from the runner blanket.

The illumination can thus be realized by the rear side of the at least one component facing away from the at least one detector. In this way, better contrast can be achieved.

Alternatively or additionally, the illumination may be effected from the detector side. In this way, the corresponding light source can be arranged in the region of the detector with little space occupation, in particular integrated into the detector. In this way, the monitoring device can overall be designed more compactly.

Advantageously, the monitoring device, in particular the at least one detector, can have a particularly integrated inspection system, by means of which it can be determined particularly if the contrast is too low. In the event that an excessively low contrast is detected, the corresponding detector performance, in particular the sensitivity, may be corrected and/or a corresponding warning signal may be generated, which indicates that the monitoring of at least one component or component type is only limited or is not possible at all due to the excessively low contrast.

Advantageously, at least one of the probes can have at least one test device, by means of which the basic setting during the start of operation and/or the testing of at least one of the probes can be simplified. Advantageously, a test image or the like can also be provided. Test measurements for determining the theoretical state can also be carried out with the aid of the test device.

In an advantageous embodiment of the method, at least one spatial region with at least one component and/or at least one component type in the form of a curved bar, a curved bar clip, a roller strip, a supporting roller, a chain link, a deflector, at least one chain zero point marking, at least one sprocket wheel can be detected by means of at least one detector. The corresponding components and/or component categories of the runner blanket may be monitored simultaneously, independently. The corresponding image portions can be specifically adapted to learn deviations of the corresponding components and/or component types. In this way, corresponding deviations can be identified more precisely, thereby simplifying the selection of suitable error handling procedures (error protocols).

According to the method according to the invention, components, in particular guide chains and/or chain wheels, can be monitored. Alternatively or additionally, the component type can be monitored, in particular a roller strip, a bent rod, a bushing, a chain link, a deflector, a carrier roller or the like. In the case of a passage of the roller blanket, all components of the same kind, in particular all rollers, all bending rods, all bushings, all chain links, all diverters, all carrying rollers or the like, can thus be monitored, in particular continuously, by correspondingly successive photography.

In a further advantageous embodiment of the method, at least one state of at least one image section can be characterized by a darkness, a brightness, a contrast curve, at least one dimension, at least one position of at least one component and/or component type or the like. The respective states can thus be clearly defined and compared. Deviations between the respective actual state and the corresponding setpoint state can thus be quickly and easily detected.

In a further advantageous embodiment of the method, the state of a plurality of image sections can be monitored. In this way, a plurality of still different components and/or component types can be monitored simultaneously. Here, each component and/or component category may be assigned a corresponding at least one image portion. The individual image portions can be optimally defined in this way and the region of interest with the corresponding component and/or component type can be analyzed. In this way, any deviations from the actual state and the theoretical state of a plurality of components and/or component types that may occur can be detected quickly and easily.

In a further advantageous embodiment of the method, at least one image can be acquired with a running welt. In this way, the welt can be monitored on-line during operation of the press. In the case of a possible deviation from the theoretical state, a corresponding warning signal can then be generated. Thus, it is not necessary to stop the roll-strip blanket for monitoring.

In a further advantageous embodiment of the method, at least the image acquisition can be synchronized with the running speed of the clothing strip. In this way, corresponding images may be taken at the locations defined by the striped carpet. The synchronization can be designed such that, if at least one component and/or component type is located in the corresponding image section, the at least one component and/or component type is then normally captured continuously in the image. In this way, a comparison of the respective actual state with the theoretical state can be achieved more simply and more precisely.

In a further advantageous embodiment of the method, a plurality of components of one type, in particular a plurality of rollers of a roller blanket and/or a plurality of bending rods and/or a plurality of links of at least one guide chain, are captured in at least one image. In this way, a correspondingly larger area of the welt can be simultaneously known. This can improve the reliability of the error recognition overall. Alternatively or additionally, the speed of acquisition (learning) can be increased overall, so that reliable monitoring can also be ensured with correspondingly higher operating speeds of the clothing strip.

Advantageously, at least one sprocket for guiding the roller carpet can be monitored by means of at least one detector. In this way, it can be detected in particular whether the at least one sprocket has not properly entered the corresponding guide chain (due to wear of the sprocket) or due to the fact that the chain is not allowed to be lengthened.

In a further advantageous embodiment of the method, a plurality of subsequent images can be acquired in the case of a running clothing strip, so that at least one component is contained in the plurality of images. In this way, redundancy can be created when monitoring components and/or component types. This can improve the reliability of error detection. Thereby, at least one component can be inspected several times in sequence and the development of its actual state can be tracked.

In a further advantageous design of the method, at least one image section can be predefined, which has a length defined to extend in the running direction of the runner blanket and/or a width defined to extend transversely to the running direction of the runner blanket. In this way the image portion can be clearly defined.

By means of the defined length extending in the direction of travel, corresponding position and/or shape changes in the monitored component and/or component type in the direction of travel of the clothing strip can be identified. This length can be used to identify, in particular, whether the roller strip or the bending rod is bent or worn. It is thus also possible to detect whether the sleeves, in particular the bronze sleeves, which connect the bending rod to the respective roller strip are worn. Furthermore, corresponding roller gaps can be identified, which occur when the rollers are partially or completely detached from the roller blanket, in particular by one or two guide chains. Furthermore, it can be recognized whether the monitored elongation of the guide chain exceeds a predeterminable (predeterminable) limit level.

The monitored component and/or component type, the corresponding change in position and/or the change in shape transverse to the direction of travel can be ascertained by means of a defined width extending transversely to the direction of travel of the roller blanket. It can thus be recognized, in particular, whether the roller or bending bar is (or is not) displaced axially from the respective target position. The bending rod is in particular displaced when the corresponding bending rod clamp, which ensures the stopping of the bending rod at the chain link, is opened.

Furthermore, the course of the rolling strip, in particular the maximum displacement of the rolling strip, can be determined, in particular measured, using image portions having a defined width. In the case of a misalignment of the bars, one or more bars are displaced in the axial direction with respect to their theoretical position. By means of the maximum rolling displacement, the course of the corresponding endless belt, in particular of the endless steel belt, can be monitored, which can be guided by means of the rolling blanket. When an inadmissible deviation of the course of the rolling strand is detected, a correction can be carried out, in particular by means of a control device of the press.

Furthermore, the image section may be selected such that the bearing rollers guiding the links of the chain can be monitored. It is thus possible to identify (whether) the carrier roller is damaged, in particular broken, worn or lost.

Furthermore, the steering gear at the chain link can also be monitored. It can thus be recognized whether the steering gear is (or is not) broken or bent.

In a further advantageous embodiment of the method, at least one image section can be stored, a visual and/or audible signal can be emitted, and/or the corresponding functional sequence of the press can be influenced as a result of the alarm. In this way, it is avoided that the identified deviation leads to a malfunction or damage of the runner blanket.

Advantageously, an image can be stored which identifies the deviation between at least one actual state and the theoretical state. The position of the runner blanket where the deviation is determined may be re-checked in another cycle of the runner blanket. The storage of the images can be effected in the control and/or analysis device of the at least one detector and/or monitoring device.

In addition or alternatively, the stored images can be analyzed more precisely, in particular by maintenance personnel. Thereby, further inspection possibilities can be created.

In addition, a sequence of images may be generated from a plurality of sequentially taken images. The image sequence can be analyzed quickly and efficiently, in particular by maintenance personnel.

Overall, storing and copying the images involved has the following advantages: in order to analyze the acquired deviations, it is not necessary to stop the press first.

Due to the warning, the corresponding functional sequence of the continuously operating press can be further influenced. This allows the press to be stopped directly or to be operated in a targeted manner or else be operated without load. When particularly serious faults of the roller blanket, in particular the absence of rollers or bending rods, are known, a targeted idling operation of the press or a stoppage of the press is particularly preferred.

Advantageously, the position of the involved components at the runner blanket can also be acquired when deviations of the actual state from the theoretical state are identified. This can be achieved in particular by determining (calculating) the position of the component concerned relative to the chain zero point of the guide chain. The press can be operated in a targeted manner without load by knowing the exact position of the components involved. The section of the roller blanket in which the component concerned is present can then be run in a targeted manner into a maintenance area of the press, where a corresponding repair or maintenance can be carried out.

If the deviation learned relates to a less severe error, which can also be ruled out later, a reply to the error (sign-in) can be dispensed with first. In this case, the following can be omitted: the press is stopped directly or is operated in a targeted manner at no load. This error can be ruled out after the idling of the press, which is necessary for the total reversion, and before the rerunning or at some later point in time, in particular during one of the following maintenance shifts, at which the maintenance measures necessary for the total reversion are carried out.

Furthermore, this technical task is according to the utility model discloses solve like this in monitoring facilities: the monitoring device has at least one two-dimensional optical detector which is arranged or can be arranged such that at least one spatial region, through which at least one component and/or component type normally passes, can be recorded as a two-dimensional image, at least one control and/or evaluation device, by means of which at least one image portion of the image can be defined, by means of which a theoretical state of the at least one image portion is specified, and by means of which an actual state of the at least one image portion can be compared with the theoretical state, and if a possible deviation of the at least one actual state from the theoretical state exceeds a predefined limit, at least one alarm can be generated by means of the at least one control and/or evaluation device.

According to the utility model discloses, can be used for monitoring with the help of monitoring equipment execution according to the utility model discloses a method.

An algorithm, in particular in the form of software, can advantageously be provided, by means of which at least one image section can be specified and/or a comparison of the states can be carried out. The algorithm can advantageously be implemented and executed in a control and/or analysis unit or at least one detector or other processing means.

Advantageously, the monitoring device may have at least one optical detector for each guide chain. In this way, the respective areas of the runner blanket in the area of the guide chain can be monitored. In this area of the roll-to-roll blanket, a number of different part types may be best monitored.

Advantageously, the monitoring device may have at least two detectors, preferably four detectors. In this way, two runner blankets, i.e. a lower runner blanket and an upper runner blanket, with a total of four guide chains may be monitored.

More than four detectors may also be used. The area between the turns of the runner blanket can thus also be monitored.

Advantageously, the monitoring device can have at least one chain zero point receiver (Ketten-Nullpunktabnehmer), in particular a chain zero point counter. The chain zero point check receiver may have a chain zero point identification, in particular at one or both guide chains. The chain zero point identification can advantageously be designed such that it can be detected without contact. The position of the roller carpet can be determined at the time of passage by means of a chain zero counter. Thereby, the components of the striped carpet can be simply and reliably assigned to the corresponding images.

Advantageously, the zero point of the chain can be marked by means of so-called special links. The special link may in particular have a projection, in particular a pin, laterally, which can be detected by means of a corresponding detection device, in particular an optical detector, a light barrier or the like.

Advantageously, the elongation of the at least one guide chain can be determined by means of the monitoring device while carrying out the method according to the invention. The chain elongation can be determined over the defined path section and the chain links obtained there, taking into account the current operating speed of the roller carpet. If a predefined maximum chain elongation is exceeded, a corresponding warning can be generated. Typically, a maximum chain elongation of 1% of the total length of the guide chain should not be exceeded. As a result of the alarm, a visual signal and/or an audible signal can be generated, in particular for notifying maintenance personnel. Additionally or alternatively, the respective chain elongations (amounts) of the two guide chains may be compared with each other. Thus, the guide chains may be synchronized correspondingly.

In an advantageous embodiment, at least one synchronization device can be provided, by means of which the at least one detector can be synchronized with the operating speed of the clothing strip.

By means of the at least one synchronization device, a trigger signal (shutter signal) for the detector can be emitted each time a feature, in particular one of the rollers, one of the bent rods or one of the chain links, passes a defined position in order to generate an image. The synchronization device can have at least one corresponding trigger, by means of which a trigger signal for the at least one detector can be emitted when the feature passes. The at least one trigger can act contactlessly. In particular, the at least one trigger may have an illumination system, in particular a light barrier or a proximity switch or the like.

The synchronization device, in particular of the at least one trigger, can have a trigger part by means of which a trigger pulse can be generated.

The synchronization means may be designed to acquire a corresponding image each time the feature passes. Advantageously, a predetermined number of components of a type can be acquired with each image. In this way, a type of component, in particular a roller, a bending rod, a bushing, a deflector, a support roller or a chain link or the like, which is monitored by means of the respective image section, can be sequentially tapped in the respective sequentially following position. Thereby, acquisition reliability can be improved.

The synchronization device can alternatively be designed such that after a predetermined number of features have passed, an image can be acquired accordingly. The image may be larger, so that correspondingly multiple parts of a type to be acquired are acquired simultaneously. Each of the parts of a type to be acquired is thus only tapped once per passage of the runner blanket. In this way, the processing time can be reduced overall.

Advantageously, the synchronization of the two guide chains can be achieved by means of a synchronization device. This allows chain synchronization by means of a corresponding trigger signal. As a reference with respect to synchronization, components which are always present at the roller blanket, in particular rollers, bending rods, chain links or the like, can be used here.

Alternatively or in addition to a type of feature, at least one separate, in particular contactless, identifier can also be arranged on the roller carpet, on the basis of which a photograph (image capture) can be triggered.

In an advantageous embodiment, the at least one detector can be designed and/or arranged such that a plurality of components of one kind can be acquired simultaneously by means of the at least one detector. In this way, corresponding parts of the runner blanket may be acquired simultaneously.

Advantageously, a plurality of rollers and/or chain links can be acquired simultaneously by means of the at least one detector.

In a further advantageous embodiment, the at least one control and/or evaluation device can be functionally connected to a control device of the continuously operating press and/or to a control device of the at least one detector. In this way, the function of the at least one detector or the function of the press can be controlled by the corresponding control device, starting from the warning signal that may occur. In this way, in particular, images can be stored, or the press can be stopped or the press can be operated further in a targeted manner.

The control and/or analysis means may be implemented separately. The control and/or evaluation device can be connected to further superordinate control devices, in particular superordinate computers which control the press. From this, according to the utility model discloses a monitoring facilities and according to the utility model discloses a method can integrate into corresponding error management, and this error management also inspects other functions of press.

Furthermore, the technical task is achieved according to the invention in a continuous working press in that: the monitoring device has at least one two-dimensional optical detector which is arranged or arrangeable such that at least one spatial region, through which at least one component and/or component kind normally passes, can be acquired as a two-dimensional image by means of which, the monitoring device has at least one control and/or evaluation device, by means of which at least one image portion of the image can be defined, the theoretical state of which is specified, and the actual state of the at least one image section can be compared with the theoretical state, and if a possible deviation of the at least one actual state from the theoretical state exceeds a predetermined limit level, at least one warning can be generated by means of the at least one control and/or evaluation device.

Furthermore, the features and advantages shown in connection with the method according to the invention, the monitoring device according to the invention and the press according to the invention and its corresponding advantageous embodiments apply mutatis mutandis and vice versa. Of course, the individual features and advantages can be combined with one another, whereby further advantageous effects can be achieved which exceed the sum of the individual effects.

Drawings

Further advantages, features and details of the invention are given by the following description, in which embodiments of the invention are further explained with reference to the drawings. The features disclosed in the figures, the description and the claims are suitable for a person skilled in the art to be considered individually and can be summarized meaningfully in other combinations. The figures show schematically:

fig. 1 shows a continuously operating press with an optical monitoring device for the components of the runner blanket;

fig. 2 to 6 show images of spatial regions from the clothing strip, which were taken with the aid of the optical detector of the monitoring device of fig. 1 for identifying deviations.

Detailed Description

Like components are denoted by like reference numerals in the drawings.

Fig. 1 shows a long side view of a continuously operating press 10, which press 10 is used for producing press plates, for example for producing material plates, such as particle boards, fiber boards, straw boards and particle boards and plastic boards, from wood and/or other recycled agricultural products.

The press 10 includes a spatially lower endless steel belt 12a and a spatially upper endless steel belt 12 b. The lower steel strip 12a is driven and deflected by a corresponding lower drive drum 14a on the discharge side on the right in fig. 1 and deflected by a lower deflection drum 16a on the left in fig. 1. Correspondingly, the upper steel strip 12b is driven and deflected by an upper drive drum 14b on the discharge side and deflected by an upper deflection drum 16 b. The deflection drums 16a and 16b are divided into

drive drums

14a and 14b on the inlet side of the press 10, which are arranged on the outlet side. Between the upper section of the lower steel strip 12a and the lower section of the upper steel strip 12b, a press 18 is conveyed through the press 10 in the production direction 20 and pressed into a press plate 21.

An underlying endless binder blanket 22a is disposed in the area surrounded by the underlying steel belt 12 a. The lower clothing blanket 22a is diverted accordingly, viewed in the production direction 20, after the diverting drum 16a and before the drive drum 14a by means of a diverting device not of further interest here. Correspondingly, an upper circulating runner blanket 22b is arranged in the area surrounded by the upper steel belt 12 b.

Both of the runner blankets 22a and 22b are identical in their construction. They may be different in their length. Each of the roller blankets 22a and 22b includes two endless guide chains 24, one of which is shown in fig. 2-6. The guide chains 24 run parallel to each other at a distance. A plurality of rollers 26 extend perpendicular to the guide chains 24, respectively, between the guide chains 24. The rollers 26 are each rotatable at their ends about their respective longitudinal axis by means of so-called bending rods 28 and are connected with a predetermined axial play to the guide chain 24 so as to be axially displaceable. The bent rods 28 are supported for this purpose in the axial end faces of the roller strips 26 with corresponding bushings 30, for example made of bronze. The flexure bar 28 and the bushing 30 are primarily shown in fig. 4.

The upper spatial section of the lower seam tape blanket 22a is closely attached (abutted) to the lower spatial side of the upper spatial section of the lower steel belt 12 a. Platen/hot plate 32a is located on the underside of the upper section of lower welt blanket 22a that faces away from the upper section of lower steel strip 12 a. The rollers 26 of the lower roller blanket 22a are inserted together between the platen/hot plate 32a and the lower steel strip 12a, respectively. The circulation of lower roller blanket 22a is to rollingly support lower steel strip 12a relative to platen/hot plate 32 a.

The lower spatial section of upper roller blanket 22b travels (extends) between the lower spatial section of upper steel belt 12b and upper platen/hot plate 32 b. The rollers 26 of the upper roller blanket 22b rollingly support the upper steel belt 12b relative to the upper platen/hot plate 32 b.

Furthermore, the press 10 has a monitoring device 34 for the components of the roller blankets 32a and 32b, i.e. the roller strip 26, the bending bar 28, the bushing 30 and the guide chain 24. The monitoring device 34 has a total of, for example, four substantially identical detector systems 36, of which, for example, two are shown in fig. 1.

Each detector system 36 comprises a two-dimensional optical detector 38, for example in the form of a camera, having a two-dimensional sensor chip with local resolution, a control/evaluation device 40, a trigger 42 and a light source 44.

Accordingly, the detector 38 is aligned with a spatial region through which one of the guide chains 24 extends in the inlet region of the press 10. Here, two detectors 38 are disposed below the lower section of lower runner blanket 22a, and two detectors 38 are disposed above the upper section of upper runner blanket 22 b.

Alternatively, it is possible that within

roll blankets

22a,22b, two detectors 38 are arranged in the direction of travel 52 in the ascending area of the lower roll blanket 22a before turning drum 16a, and two detectors 38 are arranged in the direction of travel 52 in the descending area of the upper roll blanket 22b before turning drum 16 b. Other areas of the

strip blankets

22a,22b are also contemplated for placement of the detectors.

To each detector 38 is assigned a light source 44, which is located on the side opposite to each other with respect to the corresponding

roll bar blanket

22a or 22 b. By means of light source 44, the

respective welt blankets

22a and 22b are illuminated from their rearward sides with respect to the respective detectors 38.

The detector 38 is connected in terms of control and signal technology to its corresponding control/evaluation device 40. Furthermore, the acquired image 46 can be stored and processed by means of the control/evaluation device 40.

Trigger 42 is arranged near one of guide chains 24 of the

corresponding roller carpet

22a or 22b, so that the passage of a feature of

roller carpet

22a or 22b, such as roller 26 or curved bar 28, can be acquired by means of trigger 42. The trigger 42 may be configured, for example, as a grating or proximity switch. With this trigger 42, a trigger signal can be generated each time one of the features, for example one of the rollers 26 or one of the curved bars 28, passes the corresponding trigger 42. The image triggering (activation) of the detector 38 can be initiated by the control/evaluation device 40 with the aid of a trigger signal. Thus, the image acquisition of the detector 38 may be synchronized with the travel speed of the corresponding guide chain 24. The flip-flop 42 thus acts as a synchronization means.

In the following, a method for monitoring the components of the lower roller blanket 22a, for example for all detector systems 36, is further explained with the aid of the spatially lower detector system 36 shown in fig. 1.

In the case of a running roller blanket 22a, a trigger signal is generated by means of the trigger 42 each time one of the rollers 26 passes through, and is transmitted to the control/evaluation device 40.

The detector 38 is controlled by means of the control/evaluation device 40, so that an image 46 is acquired. Such an image 46 is shown in fig. 2-6, which shows a snapshot of the spatial area with the corresponding components of the passing welt blanket 22 a. The image 46 in fig. 2 captures, for example, two of the simultaneously rolled strips 26, the corresponding curved bar 28, and six corresponding links 48 of the guide chain 24.

By means of suitable software, a plurality of image portions 50 are defined in the image 46 by means of the control/evaluation device 40. In fig. 2, for example, three image (truncated) portions 50 are shown. Each image (truncated) portion 50 is optionally separately viewable through a rectangular box.

For each of the image sections 50, the corresponding actual state is separately compared with a predetermined theoretical state. The actual state and the theoretical state may be characterized, for example, by the blackness of the corresponding image portion 50. The respective theoretical state for each of the image sections 50 is determined in advance, for example, during a test measurement and is stored in the control/evaluation device 40. If it is determined that the deviation between the actual state and the corresponding theoretical state exceeds a predetermined limit level, an alarm is generated. The limit degree of the deviation can be characterized in the case of the described embodiments by the difference in the respective blackness. In addition, the image 46 concerned is stored in the control/analysis device 40, so that it can be viewed again at a later time.

By means of the left image section 50 in fig. 2, the course of the rolling bar 36 is measured, for example, by comparing the actual state with a predetermined theoretical state. The left image portion 50 in fig. 2 has a length 54 defined along the direction of travel 52 of the roll-strip blanket 22a and a width 56 defined transverse to the direction of travel 52. The image section 50 captures the spatial region through which the end of the corresponding roller strip 26 passes over almost the entire length of the image 46 in the direction of travel 52.

The intermediate image portion 50 in fig. 2 captures the spatial region through which the diverter 58 of the link 48 passes. If one of the deflectors 58 is bent or broken, as shown, for example, in fig. 2, the respective actual state of the central image section 50 deviates from the predefined setpoint state, so that a corresponding warning signal is emitted. The warning signal is transmitted to the control/evaluation device 40. Since a broken diverter 58 could damage the clothing 22, which is a serious error involved, a corresponding warning signal is transmitted to the central control 60 of the press 10 by means of the control/evaluation device 40. By means of the central control unit 60, a fault-function process is initiated, in the case of which the press 10 is specifically unloaded and stopped. In addition, audible and/or visual cues for maintenance personnel may be emitted.

The image section 50 on the right in fig. 2 is generally square and has a length 54 in the direction of travel 52 that is less than the corresponding elongation of the guide chain 48. The image section 50 is located outside the spatial region with the links 48 and is aligned with the spatial region through which the chain zero point indicator 62 in the form of a pin passes. Once the chain zero marker 62 in one of the images 46 appears in the corresponding right image portion 50, the actual state at that point changes and deviates from the theoretical state. The theoretical state of the image section 50 on the right represents, for example, the situation without the chain zero marking 62. A corresponding alarm in the form of a zero point notification (report) is generated and given to the control/analysis means 40.

Starting from the zero point notification (reporting), the corresponding position value is gradually increased at each further trigger signal of trigger 42, so that the corresponding position of roller blanket 22a and thus the error that may occur are known at each image acquisition.

Other alternative or additional possibilities for defining the image section 50 are shown in fig. 3, for example.

Three identical image sections 50 are defined on the left in the image 46 in fig. 3, which are each assigned to a position in which one of the bending bars 28 is normally located. The lengths 54 of the image portions 50 each correspond to the drawn diameter of the curved shaft 28. The width 56 of the image portion 50 is slightly less than the width of the visible area of the curved bar 28. If one of the bending bars 28 is bent, as is the case, for example, in the bending bar 28 shown in the middle, the respective actual state of the image section 50 concerned deviates from the respective theoretical state, so that a respective warning signal is generated as an alarm (as has been explained above in connection with fig. 2, for example) and is transmitted on.

On the right in fig. 3, an image section 50 is defined, which monitors the outer region with the links 48. With the aid of this image section 50 it can be learned that: (or not) the carrying roller 64 is missing as shown in fig. 3, for example; whether one of the missing carrier roller 65 or curved bar 28 is axially displaced; displaced curved rods 29. The bent rod 28 may, for example, be axially displaced when the corresponding bent rod clamp 66 has been released. For example, in fig. 3, one of the bent rods 28 in the middle is shown displaced axially.

Other alternative or additional possibilities for defining the image portion 50 are shown in fig. 4.

In fig. 4, the upper image portion 50 is aligned with the area of space through which the ends of the roller strip 26 pass. By means of this image section 50, the axial offset of the rollers 26 can be ascertained, as shown, for example, in fig. 4 for one of the rollers 26.

The lower image section 50 in fig. 4 is aligned with (is directed to) the spatial region through which the corresponding sleeve 30 passes in the event of an axial displacement of the roller strip 26. By means of this image section 50 it can be known whether the shaft sleeve 30 is (or is) worn out or missing.

In fig. 5, for example, an upper image section 50 is defined, with the aid of which it can be ascertained that one or more of the rolling bars 26 are missing.

The lower image section 50 in fig. 5 is defined such that it can be seen by means of this lower image section that the corresponding roller strip 26 is (or is) bent. To this end, the corresponding length 54 of the image section 50 is selected such that it is slightly larger than the diameter of the rendering (projection) of the scroll bar 26.

Fig. 6 shows a further possibility for defining an image section 50, by means of which image section 50 an error of a rolling bar 26 can be ascertained. The corresponding image portion 50 extends here over a corresponding, greater extension transverse to the direction of travel 52 of the runner blanket 22 a.

By simultaneously taking a plurality of one type of component, i.e., a plurality of rollers 26, a plurality of curved rods 28, a plurality of bushings 30, a plurality of diverters 58, and a plurality of links 48, in the image 46, each component is correspondingly learned a plurality of times in the sequentially taken image 46. In this way, error identification reliability can be improved.

In a configuration of the method, which is not shown, a trigger signal is first generated by means of the trigger 42 after a predetermined number of features have passed, for example after five rollers 26 have passed. Thus, the image 46 is only acquired at every fifth bar (every fourth bar) 26. The image portion is larger here, so that a plurality of parts to be acquired, for example five rollers 26, are acquired simultaneously. Each part to be acquired is thus only photographed once per pass of the welt mat 22. In this way, the processing time can be reduced overall.

The control/evaluation devices used, for example the control/evaluation device 40, the central control device 60 and possibly further control/evaluation devices, can be implemented as separate units or at least partially combined and/or at least as common components.

List of reference numerals:

10 press

12a,12b circulating steel strip

14a,14b drive cylinder

16a,16b steering tube

18 pressing material

20 direction of production

21 pressing plate

22a,22b taped blanket

24 circulation guide chain

26 rolling strip

28 bending rod

29 displaced curved rod

30 shaft sleeve

32a,32b platen/heater plate

34 monitoring device

36 Detector System

38 optical detector

40 control/analysis device

42 trigger

44 light source

46 image

48 chain links

50 image part

52 direction of travel

54 length

56 width

58 steering gear

60 central control device

62 chain zero point identification

64 carrying roller

65 missing carrier roll

A 66 bar clamp.

Claims

1. A monitoring device (34) for at least one component (62) and/or component type (26, 28, 30, 48, 58, 64, 66) of a roller blanket (22a, 22b) of a continuously operating press (10) for producing press platens (21), characterized in that the monitoring device (34) has at least one two-dimensional optical detector (38) which is arranged or arrangeable such that at least one spatial region through which the at least one component (62) and/or component type (26, 28, 30, 48, 58, 64, 66) normally passes can be acquired as a two-dimensional image (46) by means of the at least one two-dimensional optical detector,

the monitoring device (34) comprises at least one control and/or evaluation device (40) by means of which at least one image portion (50) of the image (46) can be defined, by means of which a theoretical state of the at least one image portion (50) is specified, and by means of which an actual state of the at least one image portion (50) can be compared with the theoretical state,

and if a possible deviation of at least one of the actual states from the setpoint state exceeds a predetermined limit level, at least one warning can be generated by means of the at least one control and/or evaluation device (40).

2. Monitoring device according to claim 1, characterized in that at least one synchronization means (42) is provided, by means of which at least one detector (38) can be synchronized with the running speed of the clothing (22a, 22 b).

3. The monitoring device as claimed in claim 1 or 2, characterized in that the at least one detector (38) is designed and/or arranged such that a plurality of components (26, 28, 30, 48, 58, 64, 66) of one kind can be acquired simultaneously by means of the at least one detector.

4. The monitoring device according to claim 1 or 2, characterized in that the at least one control and/or analysis device (40) is functionally connected to a control device (60) of the continuously operating press (10) and/or to a control device of the at least one detector (38).

5. A monitoring device according to claim 1 or 2, characterised in that the continuously operating press is used for producing material boards from wood and/or recycled agricultural products.

6. The monitoring device of claim 5, wherein the sheet of material is particle board, fiber board, straw board, particle board, and plastic board.

7. A continuously working press (10) for producing press platens (21), wherein the continuously working press (10) has at least one runner blanket (22a, 22b) and at least one monitoring device (34) for at least one component (62) and/or component kind (26, 28, 30, 48, 58, 64, 66) of the at least one runner blanket (22a, 22b), characterized in that the monitoring device (34) has at least one two-dimensional optical detector (38) which is arranged or arrangeable such that at least one spatial region through which the at least one component (62) and/or component kind (26, 28, 30, 48, 58, 64, 66) normally passes can be acquired by means of the at least one two-dimensional optical detector,

the monitoring device (34) has at least one control and/or evaluation device (40) by means of which at least one image portion (50) of the image (46) can be defined, a theoretical state of the at least one image portion (50) is specified, and an actual state of the at least one image portion (50) is compared with the theoretical state,

and if the at least one actual state deviates from the setpoint state by more than a predetermined limit, at least one warning can be generated by means of the at least one control and/or evaluation device (40).

8. A continuously operating press as claimed in claim 7, characterized in that the continuously operating press is used for producing material plates from wood and/or recycled agricultural products.

9. A continuously operating press as claimed in claim 8, characterized in that the material plates are particle boards, fibre boards, straw boards and particle boards and plastic boards.