Cutting device for cutting a band-shaped material, in particular a sticky cord band

Abstract

Cutting device for cutting a band-shaped material, in particular a sticky cord band, comprising a bar-shaped lower blade (5) and a bar-shaped upper blade (6), which is moved vertically with respect to the fixed lower blade (5) for cutting, wherein the lower blade (5) is arranged on a blade carrier (3), which blade carrier (3) is mounted on a device frame (2) for linear and horizontal movement and is linearly movable via adjusting means (8) such that the position of the lower blade (5) relative to the upper blade (6) can be changed and a cutting gap (S) between the two can be adjusted, as well as a device for detecting the horizontal movement of the lower blade (5) relative to the upper blade (6), characterized in that the device comprises at least one sensor (9), via which a value representing a measure of the movement path of the blade carrier (3) achieved via the adjusting means (8),Sensor signal can be detected and transmitted to a processing device (11) which is set up to determine path information indicating the movement path based on the sensor signal, wherein the path information can be output on a display device (12).

Description

The invention relates to a cutting device for cutting a strip-shaped material, in particular a tacky cord strip, comprising a bar-shaped lower knife and a bar-shaped upper knife which is moved vertically with respect to the positionally fixed lower knife for cutting, wherein the lower knife is arranged on a knife carrier, which knife carrier is mounted on a device frame such that it can be moved linearly and horizontally and can be moved linearly via adjusting means in such a way that the position of the lower knife relative to the upper knife can be changed and a cutting gap which is present between the two can be adjusted, and to a device for detecting the horizontal movement of the lower knife relative to the upper knife.Cutting devices of the described type are used, for example, in the course of tire production. They serve to cut tape-shaped material, in particular a tacky cord tape, either steel cord or textile cord. The term "cutting device" is understood to mean different types of machines. These are roughly divided into scissors and slapters. Scissors used here are, for example, a Guilottinen scissors, i.e. a striking scissors with a beam-shaped, vertically movable upper blade and a beam-shaped, positionally fixed lower blade, as is considered in the present case, a round-blade or roller scissors with a rotating, horizontally movable round blade and a positionally fixed cutter beam, or scissors with a rapidly rotating saw blade. These scissors serve to cut off individual strip sections from an endless strip. Various scissors of this type are described, for example, in DE 20 2013 103 082 U. A slapper serves to longitudinally divide an endless belt, so that two or more sub-belts are formed. Here, two cooperating round knives separating the material are mostly used.Regardless of the type of cutting device, the respective knife systems are subject to a certain amount of wear. Depending on the stress and wear, corresponding maintenance or adjustment operations must therefore be carried out.In the present case, a cutting device in the form of a Guillotine scissors with a bar-shaped lower blade and a vertically movable bar-shaped upper blade is considered. During operation, the two knives are subject to a certain amount of wear. Depending on the wear and the stress, the originally set cutting gap between the two blades changes. This cutting gap separates the lower blade from the upper blade vertically passed by it, the strip material to be cut being taken up in the cutting gap during the cutting. If the cutting gap changes in its width starting from an ideal width set with respect to the strip material to be cut, this suffers from the quality of the cut, which can lead to the production of waste material.As such, when the width of the cutting gap has changed due to wear, the cutting gap is to be readjusted. In known cutting devices, this is done manually after the service personnel have previously visually checked the width of the cutting gap. For this test, the person checks and misses the cutting gap by means of an optical measuring device, also called a spy, and can thus determine the specific gap width. To enable the gap adjustment, the lower blade is arranged to be horizontally movable, i.e. it can be adjusted horizontally with respect to the upper blade which is fixed in position in the horizontal direction. As described, for example, in DE 20 2013 103 082 U 1, the lower blade is regularly arranged fixedly on one side of a table top which serves for supporting the strip material, wherein the table top and with it the lower blade can be adjusted. For this purpose, the table top is mounted in the equipment frame so as to float horizontally; in the respective position taken axially in or counter to the tape transport direction, it can be correspondingly locked, for example clamped. On the side of the table top opposite the lower blade, two adjusting devices comprising adjusting nuts to be rotated, in each case on the left and right, are usually arranged, by means of which fine adjustment of the axial movement is possible. With such an adjusting device on the respective side, the position of the table top in the longitudinal direction can be adjusted and corrected, whereby the cutting gap and the course of the lower blade to the upper blade is adjusted. The adjusting nuts are prestressed via spring elements or spring packs which apply a defined counterforce between the table top and the device frame. Depending on the direction of rotation of the adjusting screws, the lower blade can thus be finely adjusted by adjusting the table top and the cutting or cutting gap can be enlarged or reduced. The change in the width of the cutting gap within the scope of this adjustment is generally very small; the adjustment is usually carried out in the range of approximately 0.002-0.2 mm.In order to be able to record this small movement path, a suitable mechanical measuring device in the form of a dial indicator is used, which has a stylus and a mechanical display, wherein the measuring device is arranged fixed in position on the installation frame and the stylus bears against the table top. A corresponding table top movement is detected via the stylus and indicated on the mechanical, i.e. analog, display of the dial indicator, where it is read by the maintenance personnel. This type of detection and continuous checking of the adjusting movement via the measuring device is time-consuming and sometimes difficult, since there is often no simple access to the measuring device for reading the displayed values because of the compactness of the cutting device in this region and the width of the cutting device. As such, this maintenance is associated with a high outlay and requires careful planning.The invention is thus based on the problem of specifying a cutting device which is improved in comparison therewith.To solve the problem, it is provided according to the invention in a cutting device of the type mentioned at the beginning that the device comprises at least one sensor, via which a sensor signal representing a measure of the movement path of the knife carrier effected via the actuating means can be detected and transmitted to a processing device, which is configured to determine path information indicating the movement path on the basis of the measured value, wherein the path information can be output on a display device.The invention provides for the arrangement of a sensor which delivers a measured value in the form of an electrical sensor signal, which sensor signal is a measure of the movement path of the lower blade in the horizontal direction relative to the upper blade. The sensor signal is sent to a processing device connected to the sensor, which processes the sensor signal using a suitable processing algorithm and, based thereon, ascertains a piece of path information, which represents the actual length of movement that the altimeter has been displaced via the adjusting means. This path information thus describes the actual displacement path of the undercutter via the adjusting means. At a display device communicating with the processing device, this value is then output. Since this display device can be arranged at any position where it can be seen by the maintenance personnel who undertakes the knife adjustment via the adjusting means, the adjustment can consequently take place in a simple manner.Usually, the cutting gap is set at an ideal initial value at the factory, i.e. the lower knife is brought into a defined initial position at the factory, which is carried out by appropriate setting of the position of the table top via the adjusting means. The table top is then locked in this initial position. If, within the scope of an optical control over the optical measuring means such as the above-described spy, by means of which the region of the cutting gap can be seen and a gap measurement is possible, it is found that the cutting gap no longer has the defined starting width, i.e. the two knives are no longer in the starting position, the maintenance personnel will perform the adjustment. The sensor, which then carries out the corresponding information for the adjusting movement, detects, starting from the given starting position of the lower knife or the table top, which, from the point of view of the sensor, is a 0 position, the corresponding movement path which runs in the direction of the upper knife for reducing the cutting gap and for enlarging the cutting gap opposite thereto. Therefore, the actual gap width is not detected and output, but only the actual movement path of the undercutter or the table top, starting from the position at the beginning of the setting process, which position is a 0-position for the sensor. This adjustment process is thus much simpler for the maintenance personnel because of the much simpler control of the adjustment, and the path detection is also much more accurate by the electronic or digital detection of the movement path via the sensor, so that adjustments in the micrometer range can also be detected and carried out with high precision.It is conceivable that the sensor signal can be detected automatically at the beginning of an adjusting movement effected via the adjusting means. If an adjustment is thus carried out, the signal recording and thus the path detection is initiated directly at the beginning of the adjustment, and the corresponding sensor signals continuously detected in real time are detected and the path information is determined and output in real time by the processing device. Alternatively, it is conceivable that the sensor signal can be detected when a detection command is given by the user via the processing device. The user thus inputs a corresponding command at the processing device or a corresponding input means, for example also the display device, provided that it is embodied as a touchscreen, that he wishes to perform an adjustment process, which results in the sensor being controlled and supplying corresponding sensor signals and the displacement measurement being performed.It is conceivable that an adjustment is possible per adjustment process only over a limited, predefined adjustment path. This serves to prevent an excessive travel from being accidentally set and damage to the knife system occurs when the knife system is restarted.For example, the maximum adjustment travel can be set to max within an adjustment process. 0.06 mm. In order to avoid this maximum travel being exceeded, it can be provided in a further development of the invention that the processing device is configured to compare the sensor signal or the determined travel information with a reference signal or a reference information and to output the comparison result at the display device. This maximum permissible travel can thus serve as a reference, with respect to which a continuous comparison of the actual travel is made. If, for example, the actual adjustment travel is equal to the reference, a corresponding alarm signal can be given, which indicates that the further adjustment is to be omitted. In this case, the processing device can either directly compare the sensor signal with a reference signal or the ascertained path information with a reference information item, that is to say the specific maximum value of the permissible actuating path.The ascertained route information is then output as a numerical value on the display device. Since the sensor continuously detects the adjusting movement, the displayed value is thus continuously updated, i.e. the actual adjusting path is displayed to the maintenance personnel in real time, so that it is possible to detect with high accuracy the extent to which the adjustment has taken place and whether the adjustment target has been reached. As described, the travel is usually very small, it is in part in the micrometer range. Color information can also be associated with the output of the numerical value. If, for example, an upper limit for the maximum adjustment of 0.06 mm is set, which should not be exceeded, then, as long as the actual adjustment travel is less than 0.06 mm, the display can be stored green, for example, and when the adjustment limit of 0.06 mm is reached, the display can switch over to a red storage. It is also conceivable, when approaching the setting limit, for example when a setting distance of 0.05 mm is reached, to switch the display to yellow, so that the personnel are warned shortly before reaching the setting limit. A type of traffic light system can therefore be provided with respect to the additional color information.As an alternative to displaying a specific numerical value, it is also conceivable to reproduce the path information in the form of a graphical representation, for example as a bar graph, which has a path scaling of, for example, 0.0 mm-0.06 mm, and to which a marking in the form of a pointer is assigned, which points to the scaling value set. Other graphical representations which represent the variable path information are of course also conceivable.It is also conceivable that the processing device for a change of the cutting gap is configured to determine a movement length to be created by means of the adjusting means for adjusting the undercutter, which movement length can be output on the display device. By means of a suitable processing algorithm, the processing device can additionally also determine which specific adjustment path should be set in the pending adjustment process in order to readjust the cutting gap to a dimension which is ideal or preferable for cutting the strip material. For this purpose, for example, the value of the actual width of the cutting gap determined by the personnel before the start of the adjusting operation by means of optical monitoring and measurement can be input at an input device, whereupon the processing device, expediently taking into account material parameters of the strip material to be cut, such as the strip type (textile cord or steel cord), the strip thickness, the strip condition and the like, determines and outputs an ideal width measure for the cutting gap and, starting from the input actual width value and the desired width value, determines and outputs the adjusting path to be carried out. The maintenance personnel can then carry out the adjustment exactly with continuous sensor monitoring, so that the desired target value is reached.In a further development of the invention, the adjusting means can comprise two separate adjusting devices which are coupled to the knife carrier in the region of its lateral ends and which can be actuated separately. As described, lateral adjusting devices which comprise two adjusting nuts upon manual actuation are regularly used, by means of which the knife carrier and thus the undercutter are linearly displaced. In this context, it is expedient to assign a separate sensor to virtually each of the mechanical adjusting devices, that is to say to the respective adjusting mechanism which is actuated via an adjusting nut, with the result that the adjusting travel is determined with high precision at both adjusting positions. This allows, on the one hand, a highly accurate, separate adjustment at the two end regions, as well as the setting of a defined tilt about a vertical axis or the resolution of a given tilt by marginally different adjusting movements via the two separate adjusting devices.The adjusting devices themselves can be spindles with manually operable adjusting nuts or spindle drives operable by a respective servomotor. In the case of manual actuation, the corresponding adjusting nuts are provided, which are manually actuated with a suitable tool and are connected to the spindle via fine threads, so that a highly accurate and precise position is possible. Alternatively, it is also conceivable that spindle drives with a spindle and a spindle nut, which is driven by a servomotor, are used, wherein fine threads are also provided here. Thus, different embodiments of suitable adjusting devices are conceivable, which are always to be designed such that highly precise adjusting paths in the micrometer range are possible.As already stated, two sensors are advantageously provided, which are spaced apart from one another horizontally. They are thus spaced apart from one another along the knife carrier, viewed horizontally, and are positioned to the sides or lateral ends of the knife carrier. They each supply separate sensor signals and are evaluated separately, so that an accurate determination of the actuating travel is possible at two positions, and when two separate actuating devices are used with respect to each actuating device. This also allows highly precise different adjusting paths to be realized on both sides, for example via one adjusting device a movement path of 0.02 mm and via the other adjusting devices a movement path of 0.03 mm or the like, so that ultimately the lower blade can either be adjusted on both sides only horizontally synchronously, or if necessary also with a minimum tilting about a vertical axis.The or each sensor is preferably designed as a sensing pin, comprising a housing and a pin which is movable relative to the housing. The pin can thus be moved into and out of the housing, depending on the respective displacement direction. With each still so marginal relative movement of the stylus relative to the housing, a position-specific sensor signal is generated, i.e. corresponding measuring or position sensing means are provided in the housing, which high-precision sense the actual position of the stylus relative to the housing, wherein the sensor signal is then given to the processing device for further processing.Alternatively to the use of such a stylus, it is also conceivable that the or each sensor is a light-optical sensor comprising a housing with a device emitting a scanning light beam and detecting a reflection light. While the stylus performs a mechanical scanning, a contactless scanning and thus a path determination takes place via a light-optical sensor. This sensor has transmitting and receiving means accommodated in a housing, via which a scanning light beam directed onto the component to be moved is emitted and reflection radiation reflected by the component is detected, on the basis of which the actual sensor signal is then generated, so that the processing device is given.The housing can be connected to the knife carrier and the pin can abut the device frame or the scanning light beam can be directed onto the device frame. That is to say that in this case the housing is moved while the pin bears against the device frame in a positionally fixed manner or the scanning light beam is directed onto the positionally fixed device frame. Of course, the arrangement can also be reversed.After adjustment has been completed, the knife carrier, i.e. the table top, is to be anchored again in the assumed end position and consequently to fix the assumed position of the undercutter. For this purpose, suitable, mechanically or hydraulically actuatable clamping means are provided which, on the one hand, are easy to release for an adjusting process and, on the other hand, are also easy to clamp again and at the same time allow a sufficiently firm locking.In addition to the cutting device itself, the invention also relates to a method for adjusting a cutting gap between an upper blade and a lower blade of a cutting device for cutting a strip-shaped material, in particular a tacky cord strip, wherein the cutting device comprises a beam-shaped lower blade and a beam-shaped upper blade which is moved vertically with respect to the positionally fixed lower blade for cutting, wherein the lower blade is arranged on a blade carrier, which blade carrier is mounted on a device frame such that it can be moved linearly and horizontally and can be moved via adjusting means such that the position of the lower blade relative to the upper blade can be changed and a cutting gap which is present between the two can be adjusted, and to a device for detecting the horizontal movement of the lower blade relative to the upper blade. This method is characterized in that at least one sensor of the device is used to record a sensor signal representing a measure of the movement path of the knife carrier effected via the actuating means and is sent to a processing device which determines path information indicating the movement path on the basis of the measured value, wherein the path information is output on a display device.In this case, it can be provided that the sensor signal is automatically detected via the actuating means at the beginning of an actuating movement, that is to say that the detection operation automatically starts directly with the initiation of the adjustment. Alternatively, it can be provided that the sensor signal is detected when a detection command is given by the user via the processing device. Here, therefore, the signal acquisition start is triggered by the command input.Furthermore, the processing device can compare the sensor signal or the ascertained path information with a reference signal or a reference information item and output the comparison result at the display device.The path information displayed to the maintenance personnel can preferably be output as a numerical value on the display device, wherein this value can additionally be assigned color information indicating whether the already created control path is within defined, permissible control limits. Alternatively, an output of the path information in the form of a graphical representation is also conceivable.Furthermore, it can be provided that the processing device determines the movement length to be created for a change in the cutting gap by means of the adjusting means for adjusting the undercutter, which movement length is output on the display device.As the sensor, a stylus including a housing and a stylus movable relative to the housing may be used, or a light optical sensor including a housing having a scanning light beam emitting and a reflection light detecting means may be used.Further advantages and details of the invention are evident from the exemplary embodiments described below and on the basis of the drawing. The following are shown: FIG. 1 shows a schematic illustration of a cutting device according to the invention in a side view, FIG. 2 is a plan view of a cutting device according to the invention as a partial view showing the blade carrier of the undercutter with adjusting means of a first embodiment, FIG. 3 is a plan view of a cutting device according to the invention as a partial view showing the blade carrier of the undercutter with adjusting means of a second embodiment FIG. 4 shows an enlarged partial view of a cutting device according to the invention, illustrating in principle the arrangement of a sensor in the form of a probe pin, FIGS. 5-7 are schematic representations of partial views of a cutting device according to the invention for illustrating the adjusting process and an associated display device, FIG. 8 is a partial view of a cutting device with a knife carrier, a locking means associated therewith and an adjusting means of a first embodiment; and FIG. 9 shows a partial view of a cutting device with a knife carrier, a locking means associated therewith and an adjusting means of a second embodiment.FIG. 1 shows a cutting device 1 according to the invention in the form of a guillotine scissors. The cutter 3 serves to cut pieces of tape from a tape-shaped endless material such as a textile cord or steel cord supplied thereto. The cutting device 1 comprises a device frame 2, which can also be called a machine frame and on which a knife carrier 3 in the form of a table top 4 is arranged, which can be moved in a floating or horizontal manner, as shown by the double arrow P 1. A beam-shaped undercutter 5 is arranged on the knife carrier 3. Furthermore, an upper knife 6 is provided which is arranged on a further knife carrier 7 which is guided on the device frame 2 via guide devices, not shown in detail, which are vertically movable, as shown by the double arrow P 2. Between the lower blade 5 of the upper blade 6 there is a cutting gap S which can be adjusted by adjusting the position of the lower blade 5 by horizontally displacing the blade carrier 3, that is to say the table top 4. For this purpose, corresponding adjusting means 8 are provided, which will be described in more detail below and can be actuated either manually by screwing corresponding adjusting nuts, which run on fine-threaded spindles, or by actuating a threaded spindle drive, likewise with fine threads, via adjusting motors.For the high-precision detection of such an adjusting movement, at least one sensor 9 is provided, which is preferably a stylus 10. An electrical sensor signal is detected via this sensor, which represents a measure of the movement path of the knife carrier 3 and thus of the undercutter 5 that is produced via the actuating means 8, and is sent to a processing device 11 connected to the sensor 9 or the stylus 10, which processing device uses a suitable evaluation algorithm to determine path information indicating the movement path based on the sensor signal, wherein the path information is output on a display device 12, for example a display. A person performing the adjustment can view the display device in the best possible and convenient manner, while performing the adjustment via the adjusting means 8, so that, in addition to the highly precise detection of the movement path in electronic or digital form, the actuation and path control is convenient.In order to determine whether an adjustment of the undercutter 5 and thus an adjustment of the width of the cutting gap S is necessary, the personnel usually carry out an optical check of the cutting gap S, i.e. an optical measurement, for which purpose the cutting gap S is optically viewed and measured by the person using a suitable optical measuring instrument, thus also called a spion. In this way, it can be determined whether and if so to what extent the cutting gap S is to be corrected and, as a result, by what movement path the lower blade 5 is to be adjusted, wherein this movement takes place either in the case of an excessively large cutting gap S toward the upper blade 6 or in the case of an excessively small cutting gap S, up to a marginal overlap of the upper blade 6 and lower blade 5, away from the upper blade 6. After a required adjustment has been established, the fixing means 13 are released, by means of which the knife carrier 3 is locked in a positionally fixed manner on the device frame 2. These locking means are preferably mechanically or hydraulically actuatable clamping means. After the detachment has taken place, the adjustment of the undercutter 5 takes place via the adjusting means 8, wherein, as a result of the continuous detection of the movement path of the cutter carrier 3 via the sensor 9 and the continuous display of the actually carried out movement path or adjusting operation on the display device 12, the person can check highly accurately how the adjusting operation takes place and when the desired target adjustment and thus the desired target position of the undercutter 5 has been reached. The adjusting process then ends and the knife carrier 3 is locked again by the locking means 13, so that the relative position of the lower knife 5 to the upper knife 6 is fixed again.FIG. 2 shows a top view of a cutting device 1, wherein here the device frame 2 and the knife carrier 3 are shown in the form of the table top 4 and the lower knife 5; the upper knife 6 is indicated. Fixing means 13 provided on both sides are also indicated.Also shown are the adjusting means 8, which are realized in the form of two separate adjusting devices 14. The adjusting devices 14 are arranged on both sides of the knife carrier 3 and can be operated manually in the illustrated embodiment. A fine-threaded spindle 15 is provided on which runs a respective adjusting nut 16 which is to be actuated manually in order to move the knife carrier 3 linearly and horizontally. Depending on the direction of rotation, which may be clockwise or counter-clockwise, as shown by arrows P 3 and P 4, the corresponding direction of movement, which is shown by arrows P 5 and P 6, changes.Since each adjusting device 14 can be individually actuated, a separate adjustment on both sides can consequently be carried out, which allows the blade carrier 3 to also be marginally tilted about a vertical axis, so that an angle lying in the range of a few angular seconds or angular minutes between the two cutting edges of the lower blade 5 and the upper blade 6 can either be precisely adjusted or compensated, that is to say the cutting edges can be adjusted in parallel again.Each actuating device 14 is assigned a sensor 9 in turn in the form of a stylus 10, so that ultimately the movement path can be detected at both actuating positions or a corresponding sensor signal can be recorded. Both sensor signals are given to the common processing device 11 for ascertaining the path information, wherein the processing device 11 in this case preferably ascertains and outputs two separate path information items which are assigned to the individual actuating devices 14.FIG. 3 shows a comparable cutting device 1 as already shown and explained in FIG. 2. Reference is made to the relevant explanations. The only difference in this case is that the adjusting means 8 or the two adjusting devices 14 are actuated here by motor, i.e. automatically, for which purpose each adjusting device 14 has a separately controllable servomotor 17 with an associated transmission 18. The adjusting devices 14 furthermore comprise respective threaded spindle drives 19, wherein either the spindle nut or the spindle itself is actuated via the servomotor 17 and the gear 18. Depending on the direction of rotation of the respective servomotor 17, which can also take place here again in the clockwise and counter-clockwise direction, as indicated by the arrows P 3 and P 4, a movement in the belt conveying direction, see arrows P 5, or counter to the belt conveying direction, see arrows P 6 also results here.FIG. 4 shows a partial view of the cutting device 1, wherein the cutting-blade carrier 3 in the form of the table top 4 and the device frame 2 are shown in detail. As the double arrow P 1 indicates, the knife carrier 3 is horizontally movable relative to the positionally fixed installation frame 2, on which the knife carrier 3 or the table top 4 is guided via suitable guides. The sensor 9 is also shown in the form of the stylus 10, comprising a housing 20 and a pin 21 movable into and out of the housing 20, wherein naturally two such sensors 9 can be provided, as already described above. A suitable detection means for detecting the position of the pin 21 or its movement is integrated in the housing 20 and supplies the actual sensor signals describing the movement path, which sensor signals are sent to the processing device 11 via a communication line 22. The housing 20 is connected via a mounting bracket 23 to the knife carrier 3, here the table top 4, while the pin 21 is supported with its tip on a bearing surface 24 of the device frame 2. If a displacement of the table top 4 occurs relative to the fixed-position device frame, depending on the direction of movement, the pin 21 is pushed into the housing 20 or, since it is spring-loaded, for example, via a spring provided in the housing, is pushed out of the latter. Any pen movement that is still so marginal is detected via the detection means and communicated via corresponding sensor signals to the processing device 11, which on the basis thereof determines corresponding piece of travel information that is output on the display device 12.FIGS. 5-7 show, by way of example, a detail of a cutting device 1, of which the knife carrier 3 or the table top 4 together with the lower knife 5, the device frame 2, the further knife carrier 7 and the upper knife 6 and the cutting gap S are shown. Also shown is the display device 12 on which a corresponding piece of path information 25 determined by the processing device 11 is reproduced here in the form of a graphical representation.In the positioning situation shown in FIG. 5, a cutting gap S is present, i.e. the upper blade 6 moves laterally next to the lower blade 5 separated over the cutting gap S during lowering. A sensor 9 is shown again in the form of a stylus 10; FIGS. 5-7 show, merely for the purpose of explanation, an adjustment in which, starting from a cutting gap shown in FIG. 5, the lower blade 5 is displaced to such an extent that it would overlap the upper blade 6, which is of course not the case during operation. Only the adjusting process per se and the change of the position-dependent, represented path information in the form of the graphic representation 25 will be explained with this.FIG. 5 shows, as described, the initial situation with a given cutting gap S. If now the adjustment is started, then the sensor 9 is either automatically connected immediately at the beginning of the first infinite movement, it immediately and continuously supplies corresponding sensor signals which lead to the determination of the path information which is represented as graphical representation 25. Alternatively, the measuring operation can of course also be started by way of the input of a corresponding command which the user can also give, for example, by way of the display device 12 which is embodied as a touchscreen.By way of example, a bar display 26 is shown, on which the actual movement path set is displayed continuously. The bar representation 26 has a scale 27, wherein the lowermost scale value 28 is the zero point, while the upper scale value 29 is the maximum movement path value. If it is assumed that the maximum movement path is 0.06 mm, the lowermost scaling value 28 would be 0.0 mm, the uppermost scaling value 29 would be 0.06 mm. It can be scaled in 0.01 mm steps, for example. Also shown is a mark 30 which indicates the actual movement path. This marking 30 is shown here as an arrow; it points, since the ordering process just begins, ultimately to the zero point, that is to say the lowermost scaling value 28.Assume that the knife carrier 3 is moved to the left, i.e. that the bottom knife 5 is moved to the top knife 6. This has the result that the cutting gap S decreases or, as shown in FIG. 6, is ultimately set to 0, i.e. there is virtually no longer any gap when the upper blade 6 is moved past the lower blade 5. This adjusting movement is shown within the graphic representation 25, the marking 30 has moved upward and now, since an adjustment by 0.03 mm has taken place to the assumed dimensions, ultimately points to the center of the scale 27.If the further adjustment is carried out in this direction of movement, the lower knife 5 is pushed overlapping the upper knife 6, i.e. both overlap one another, as is indicated by the illustrated overlap 31. The pin 21 is slid even further into the housing 20. This position is also detected with high precision, of course, and is shown in the illustration 25; it can be seen that the further marking 30 has moved even further upward, it points to the uppermost scaling value 29, which indicates the maximum permissible travel of 0.06 mm. It is thus clearly and immediately shown to be detectable for the person performing the adjustment that the maximum adjustment has been performed and the adjustment process is to be ended. Associated with the maximum adjustment travel being reached, a corresponding color symbolization can also be provided, i.e. the display device 12 lights up or flashes red, for example, or the marking 30 lights up or flashes red, so that a warning signal is given in this way that the maximum adjustment has been achieved. It would also be conceivable, for example, to provide a type of traffic light system with regard to the color information display. In the case of an adjustment of, for example, 0.0 mm-0.05 mm, the display device is stored in green or the marking 30 is shown in green; in the case of a greater movement path of more than 0.5 mm, the color changes to yellow, while it changes from 0.06 mm to red when the maximum adjustment is reached. This thus additionally gives the person a color signaling.Although a graphical representation 25 for indicating the path information is shown in the example described, it is of course also conceivable to ascertain and represent specific numerical values which indicate the actual movement path as path information. Instead of the bar display 26, a corresponding, continuously changing numerical value would therefore be displayed, which ultimately runs from 0.0 mm-0.06 mm if this is the maximum upper travel limit. Here too, of course, corresponding color information can be additionally provided, as described above.It is conceivable that the processing device 11 is also configured to determine a movement path to be set, which is to be set in order to achieve an ideal width of the cutting gap S, which movement path can also be additionally output as a numerical value on the display device 12.As described, the person determines the given actual width of the cutting gap S in advance with an optical measuring device. This numerical value can be input by the user of the processing device 11, for example via the display device 12, which then determines the ideal gap width, for example also taking into account specific material parameters of the strip material to be cut, and determines the required movement path for reaching this ideal gap width starting from the actual gap width with a suitable algorithm and then displays this value. Thus, in addition to a possible self-carried out determination of the required movement path, the expert also receives system-side information in this respect. The person can now, as a result of the continuous detection of the actual movement path, accurately identify when the adjustment has been carried out by the required distance.FIG. 8 shows a partial view of a cutting device 1 in a side view, in which a first embodiment is shown in principle. The knife holder 3 is again shown in the form of the table top 4, which is mounted so as to be movable or floating as described and can be fixed or clamped in its position by means of corresponding fixing means 13. Also shown are the lower blade 5 as well as the upper blade 6 and the given cutting gap S.Also shown is basically the equipment frame 3 and a sensor 9 again in the form of a feeler pin 10 which is connected via the fastening bracket 23 to the knife carrier 3 or the table top 4. Also shown is the adjusting means 8 or one of the two adjusting devices 14, which are shown here as manual adjusting means 8 with a corresponding adjusting nut 16. The adjusting devices 14 each comprise a spring assembly 32, which is basically shown and which is supported on the device frame 3 and against which the table top 4 is movable. A prestress which is directed opposite the movement of the lower blade 5 in the direction of the upper blade 6 is built up via this spring pack 32, so that the system is prestressed by working against the spring pack 32 via the adjusting nut 16 when the lower blade 5 is to be moved closer to the upper blade 6.FIG. 9 shows a cutting device 1 of individual partial view, wherein here again the knife carrier 3 is shown in the form of the table top 4, as is the corresponding fixing means 13, by means of which the table top 4 is fixed to the device frame 3. Likewise shown is the lower blade 5 and the upper blade 6 and the cutting gap S. In this embodiment, the sensor 9, again in the form of a stylus, is arranged below the table top 4 via the fastening angle 23, wherein it should be pointed out at this point that fastening elements other than such a screwed fastening means 23 can also be used independently in principle in all embodiments for positioning and fastening the respective transmitter 9.Here too, an adjusting means 8 is provided, of which again only one adjusting device 14 is shown, which in turn can be manually operated and has a corresponding adjusting nut 16. The spring assembly 32 also provided here is arranged quasi in series with the respective actuating device 14. However, the basic function is the same as described above with respect to the embodiment according to FIG. 8.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 20 2013 103 082 U [0002, 0005]

Claims

Cutting device for cutting a strip-shaped material, in particular a tacky cord strip, comprising a bar-shaped lower knife (5) and a bar-shaped upper knife (6) which is moved vertically with respect to the positionally fixed lower knife (5) for cutting, wherein the lower knife (5) is arranged on a knife carrier (3), which knife carrier (3) is mounted on a device frame (2) such that it can be moved linearly and horizontally and can be moved linearly via actuating means (8) in such a way that the position of the lower knife (5) relative to the upper knife (6) can be changed and a cutting gap (S) provided between the two can be adjusted, and a device for detecting the horizontal movement of the lower knife (5) relative to the upper knife (6), characterized in that the device comprises at least one sensor (9) via which a cutting gap is arranged in the cutting device, a measure of the sensor signal representing the movement path of the knife carrier (3) effected via the actuating means (8) can be detected and transmitted to a processing device (11) which is configured to determine path information indicating the movement path based on the sensor signal, wherein the path information can be output on a display device (12).Cutting device according to claim 1, characterised in that the sensor signal can be detected automatically at the beginning of an adjusting movement effected via the adjusting means, or in that the sensor signal can be detected when a detection command is given by the user via the processing device (11).Cutting device according to claim 1 or 2, characterised in that the processing device (11) is configured to compare the sensor signal or the determined path information with a reference signal or a reference information and to output the comparison result at the display device.Cutting device according to one of the preceding claims, characterized in that the path information can be output on the display device (12) as a numerical value or as a graphical representation (25).Cutting device according to one of the preceding claims, characterized in that the processing device (12) for a change in the cutting gap (S) is designed to determine a movement length to be produced by means of the adjusting means for adjusting the undercutter (5), which movement length can be output on the display device.Cutting device according to one of the preceding claims, characterized in that the actuating means (8) comprise two separate actuating devices (14) which are coupled to the knife carrier (3) in the region of its lateral ends and which can be actuated separately.Cutting device according to claim 6, characterised in that the adjusting devices (14) are spindles (15) with adjusting nuts (16) to be actuated manually or spindle drives (19) which can be actuated by a respective servomotor (17).Cutting device according to one of the preceding claims, characterized in that two sensors (9) are provided which are spaced apart horizontally from one another.Cutting device according to one of the preceding claims, characterized in that the or each sensor (9) is a stylus (10) comprising a housing (20) and a stylus (21) movable relative to the housing (20), or in that the or each sensor (9) is a light-optical sensor comprising a housing having a device emitting a scanning light beam and detecting a reflection light.Cutting device according to claim 9, characterised in that the housing (20) is connected to the knife carrier (3) and the pin (21) abuts the device frame (2) or the scanning light beam impinges on the device frame, or vice versa.Cutting device according to one of the preceding claims, characterized in that fixing means (13) are provided, by means of which the linearly movable knife carrier (3) can be fixed in its position relative to the device frame (2).Cutting device according to claim 11, characterised in that the fixing means (13) are mechanically or hydraulically actuatable clamping means.

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