JP4799949B2 - Method and apparatus for adjusting lap amount of shear cut type slitter using round blade - Google Patents

Description

  The present invention relates to a method and an apparatus for adjusting a lap amount of a shear-cut slitter using a round blade.

  Conventionally, there is a shear-cut slitter that uses a round blade as an apparatus for cutting a web such as a strip paper or a strip film. As this kind of slitter, the lower blade is a scissor blade 1 as schematically shown in FIG. 1 and the upper blade is a saucer blade, or the lower blade is a saucer blade 3 as schematically shown in FIG. And the upper blade is a dish-shaped blade 4.

There are the following four elements that govern the quality of cutting (cutting) of a shear-cut slitter using such a round blade.
(1) Contact pressure of a pair of knives (this is the pressure contact force in the direction of arrow P between the lower blade 3 and the upper blade 4 as schematically shown in FIG. 3).
(2) A toe-in angle between a pair of knives (this is an inclination angle α of the lower blade 3 and the upper blade 4 with respect to the flow direction of the web to be cut as schematically shown in FIG. 4).
(3) Offset between a pair of knives (this is a shift β between the center of the lower blade 3 and the center of the upper blade 4 in the flow direction of the web to be cut as schematically shown in FIG. 5) .
(4) The amount of lap between a pair of knives (this is the amount of overlap d of the cutting edge between the lower blade 3 and the upper blade 4 as schematically shown in FIG. 6).

  Of these four elements, conventionally, the amount of wrap has been adjusted exclusively by visual inspection.

  When the wrap amount is large, the tendency of “scraping” the cut of the web with the cutting edge becomes strong, the cut becomes worse, dust is generated more, and the quality is significantly lowered. Accordingly, it is desirable that the amount of lap is as small as possible. However, if the wrap amount is too small, there is a problem of roundness related to the polishing accuracy of the knife or the strength of the blade edge. Sometimes. Therefore, management of the lap amount is extremely important. For example, in the case of papermaking, 1.0 to 1.5 mm is considered appropriate.

  Moreover, the shape of the knife used for shear cutting includes a scissors-type blade (lower blade 1 in FIG. 1) and a dish-shaped blade (upper blade 2, FIG. 2, lower blade 3 and upper blade 4), In the case of a scissors-type blade, the knife diameter does not change by polishing, but in the case of a dish-type blade, the diameter is gradually reduced by polishing, so it is impossible to use a blade having a constant diameter. In general, there are many cases (see FIG. 1) that use a bowl-shaped blade as the lower blade and a dish-shaped blade as the upper blade (see FIG. 1). This is because the top and bottom dish type blades have a better cut. At present, the slitters of the upper and lower vertical blades are not used except for special cases.

  Therefore, it can be considered that all or all slitters use a countersink blade on one or both sides. Therefore, in order to obtain a certain amount of wrapping, a knife corresponding to the diameter of the countersink blade each time the knife is replaced It is necessary to adjust the position. For this reason, every time the dish-shaped blade is replaced, it takes a lot of labor to adjust the lap amount. Moreover, since it relied on the intuition of the worker, an operator with very skilled skills was required.

  Accordingly, an object of the present invention is to provide a method and an apparatus for adjusting a lap amount of a shear-cut slitter using a round blade so that the lap amount can be automatically adjusted in order to solve such a conventional problem. It is.

  According to one aspect of the present invention, in the method of adjusting the lap amount of a shear-cut slitter using a round blade, the diameter of the knife to be replaced at the time of knife replacement is automatically measured using a blade edge detection sensor, and the measurement is performed. There is provided a lap amount adjusting method characterized in that a knife position for obtaining a desired lap amount is obtained by calculation based on a knife diameter and a blade edge detection point of the blade edge detection sensor.

  According to another aspect of the present invention, in a method of automatically measuring the diameter of a knife in a shear-cut slitter using a round blade, the maximum diameter that can be used in the slitter is determined from the web surface to be cut in the slitter. A blade edge detection sensor is arranged at a reference point separated by a distance equal to a value obtained by adding a predetermined margin value to the blade edge diameter of the knife, and the knife is moved until the blade edge detection sensor is detected by the blade edge detection sensor when replacing the knife, There is provided a method characterized in that a knife diameter is calculated by calculation based on a moving distance of a knife and the reference point position.

  According to still another aspect of the present invention, in a method of automatically measuring the diameter of a knife in a shear-cut slitter using a round blade, the maximum diameter that can be used in the slitter from the web surface to be cut in the slitter. A blade edge detection sensor is arranged at a reference point separated by a distance equal to a value obtained by adding a predetermined margin value to the blade edge diameter of the knife, and the blade edge detection sensor is kept until the blade edge detection sensor is detected by the blade edge detection sensor when replacing the knife. There is provided a method characterized in that the knife diameter is obtained by calculation based on the movement distance of the blade edge detection sensor and the reference point position.

  According to still another aspect of the present invention, in a method for adjusting a lap amount of a shear-cut slitter using a round blade, the current knife diameter is temporarily stored in a counter, and a distance of 2 for moving the knife in the lapping direction is stored. The lap is characterized in that the double value is added to or subtracted from the counter value stored in the counter, and the knife is moved until the value becomes equal to the knife diameter to be exchanged to keep the lap amount before the knife exchange constant. A quantity adjustment method is provided.

  According to still another aspect of the present invention, in a lap amount adjusting device for a shear-cut slitter using a round blade, a blade edge detection sensor disposed at a predetermined reference point position of the upper blade holder and / or the lower blade drive unit; Knife movement means for moving the blade edge of the exchange knife relative to the blade edge detection sensor, knife movement control means for controlling the operation of the knife movement means, and exchange knife diameter calculation for calculating the diameter of the exchange knife The knife movement control means controls the knife movement means during knife replacement to move the knife until the knife edge is detected by the edge detection sensor, and the replacement knife diameter calculation means A knife diameter is calculated by calculation based on the movement distance of the knife and the reference point position, and the knife movement control means Wrap adjustment device, characterized in that the desired overlap amount by controlling the knife moving means on the basis of the knife diameter obtained by the calculation to the position obtained as to move the knife is provided.

  According to one embodiment of the present invention, the blade edge detection sensor is a normally closed touch sensor, and the knife moving means includes a servo motor.

  According to still another aspect of the present invention, in a lap amount adjusting device for a shear-cut slitter using a round blade, a blade edge detection sensor disposed at a predetermined reference point position of the upper blade holder and / or the lower blade drive unit; Sensor moving means for moving the blade edge detection sensor relative to the blade edge of the replacement knife, sensor movement control means for controlling the operation of the sensor moving means, and replacement knife diameter calculation for calculating the diameter of the replacement knife Means and a knife moving means, and the sensor movement control means controls the sensor moving means at the time of replacing the knife to move the blade edge detection sensor until the knife edge is detected by the edge detection sensor. The replacement knife diameter calculating means is based on the movement distance of the blade edge detection sensor and the reference point position. A lap adjusting apparatus characterized in that a knife diameter is obtained by calculation, and the knife moving means moves the knife to a position where a desired lap amount is obtained based on the knife diameter obtained by the calculation. Provided.

  According to one embodiment of the present invention, the blade edge detection sensor is a normally closed touch sensor, and the sensor moving means includes a linear scale with the blade edge detection sensor attached to the tip.

  Next, the present invention will be described in more detail with respect to the embodiments and examples of the present invention, particularly with reference to FIGS.

First, before describing specific embodiments of the present invention, the basic principle of the present invention will be described. The problems to be solved in order to automate the adjustment of the lap amount are roughly divided into the following two problems.
(1) The first problem is to automatically measure the diameters of knives such as upper and lower blades.
(2) The second problem is to automatically move the position of the knife based on the measured diameter to obtain a desired lap amount.

  According to the present invention, the first method of automatically measuring the diameter of the knife is a predetermined margin value R from the web surface to be cut in the slitter to the cutting edge diameter of the maximum diameter knife that can be used in the slitter. The position at a distance equal to the added value is used as a reference point, the blade edge detection sensor is fixed at this position, and when replacing the knife, the knife is first moved to the position where the blade edge is detected by the blade edge detection sensor. The knife diameter is calculated from the movement amount of the knife at that time.

  The second method of automatically measuring the diameter of the knife is a value obtained by adding a predetermined margin value R to the cutting edge diameter of the largest knife that can be used in the slitter from the web surface to be cut in the slitter. When the knife is replaced, the blade edge detection sensor is moved from this position toward the knife edge, and the edge detection sensor moves to the position where the edge is detected by the edge detection sensor. The amount is measured with a linear scale or the like, and the knife diameter is obtained by calculation from the movement fee of the blade edge detection sensor at that time.

  Furthermore, as another method, the position of a knife that already has an appropriate wrap amount is used as a reference point, the knife diameter at that time is stored in a distance counter, and the center of the knife is moved according to the knife diameter to be replaced. There is a method in which an appropriate lap amount is maintained by adding or subtracting a double value of the distance and moving the distance between the centers until the distance counter value becomes equal to the knife diameter to be exchanged.

  Next, specific examples of the present invention for carrying out these methods will be described. FIG. 7 is a front view schematically showing the configuration of a slitter device as an embodiment of the present invention for carrying out the lap amount adjusting method of the present invention, and FIG. 8 schematically shows the configuration of the slitter device of FIG. 9 is a side view, and FIG. 9 is a partially broken side view for explaining the detailed structure of the upper blade holder in the slitter apparatus of FIG. As shown in these drawings, the slitter device of this embodiment mainly attaches / detaches an upper blade holder 30 to which an upper blade 10 which is a dish-shaped blade is detachably attached and a lower blade 20 which is a dish-shaped blade. And a lower blade drive unit 40 that can be freely attached.

  The upper blade holder 30 is mainly composed of an upper blade holder support portion 31 that is attached and fixed to an upper blade holder mounting arm (not shown) of the slitter device, and a vertical rod that is held by the upper blade holder support portion 31. 32, a horizontal rod holding portion 33, a horizontal rod 34 held by the horizontal rod holding portion 33, and an upper blade attachment / detachment for removably attaching and fixing the upper blade 10 to the horizontal rod 34 A portion 35, a longitudinal detachable air cylinder 36 for moving the longitudinal rod 32 between the detaching position and the cutting operation position, and a lateral rod 34 for moving between the detaching position and the cutting operation position. A laterally detachable air cylinder 37, an upper blade lifting gear box 38, an upper blade lifting geared AC servo motor 39, and an upper blade touch sensor 50 And a upper blade touch sensor support portion 51 for mounting fixed to the upper blade holder supporting portion 31 of the upper blade for touch sensor 50. Further, the upper blade holder 30 includes an upper blade lifting motor drive control device 80 provided between the upper blade lifting geared AC servo motor 39 and the upper blade touch sensor 50, and an upper blade lifting distance calculation device 81. Prepare. Upper blade lifting / lowering motor drive control device 80 includes a drive source for upper blade lifting / lowering geared AC servomotor 39 and a control unit for controlling the operation thereof. The upper blade lifting distance calculation device 81 has an input unit for inputting necessary parameters such as a knife diameter, and a storage unit or counter for storing an input value from the input unit, a measured value such as a moving distance, and the like. And an arithmetic unit that calculates the upper blade lifting distance, the upper blade diameter, and the like based on the values stored in the storage unit or the counter.

  The lower blade drive unit 40 mainly includes a lower blade drive unit base frame 41, a guide plate 42 which is attached to the upper surface of the lower blade drive unit base frame 41 and supports and guides the lower surface of the web to be cut, and a lower blade shaft holding portion. 43, a lower blade shaft 44 held by the lower blade shaft holding portion 43, a lower blade attaching / detaching portion 45 for detachably attaching and fixing the lower blade 20 to the lower blade shaft 44, and the lower blade 20 A lower blade drive motor 46 for driving the blade, a linear bearing 47 for slidably mounting and holding the lower blade shaft holding portion 43 to the lower blade drive unit base frame 41, and a lower blade lifting gear. A box 48, a geared AC servo motor 49 for raising and lowering the lower blade, a touch sensor 60 for the lower blade, And a lower blade touch sensor support 61 for attaching and fixing the blade for touch sensor 60 with respect to the lower blade drive unit base frame 41. Further, the lower blade drive unit 40 includes a lower blade lifting motor drive control device 90 provided between the lower blade lifting geared AC servo motor 49 and the lower blade touch sensor 60, and a lower blade lifting distance calculation device 91. Prepare. The lower blade raising / lowering motor drive control device 90 includes a drive source for the lower blade raising / lowering geared AC servo motor 49 and a control unit for controlling the operation thereof. The lower blade lifting distance calculation device 91 has an input unit for inputting necessary parameters such as a knife diameter, and a storage unit or counter for storing an input value from the input unit, a measured value such as a moving distance, and the like. And a calculation unit for calculating the lower blade lifting distance, the lower blade diameter, and the like based on the values stored in the storage unit or the counter.

  The structure of the upper blade holder 30 will be described in more detail with reference to FIG. As shown well in FIG. 9, a horizontal rod holding portion 33 is horizontally attached to the lower end of the vertical rod 32, and an upper blade lifting screw 321 is provided on the upper end of the vertical rod 32. ing. The longitudinal rod 32 is moved longitudinally along the linear bearing 311 provided in the upper blade holder support 31 in accordance with the operation of the longitudinal detachable air cylinder 36 or the upper blade lifting geared AC servo motor 39. It can be moved. The lateral rod 34 is movable in the lateral direction along the linear bearing 331 provided in the lateral rod holding portion 33 according to the operation of the lateral detachable air cylinder 37.

  The upper blade raising / lowering gear box 38 includes an upper blade raising / lowering driving gear 381 attached to the drive shaft of the upper blade raising / lowering geared AC servo motor 39 and rotating in accordance with the rotation of the driving shaft, and the upper blade raising / lowering driving gear 381. And the upper blade lifting gear 322 engaged with the upper blade lifting screw 321 and transmitting the rotational drive by the upper blade lifting geared AC servo motor 39 to the upper blade lifting gear 322. And are provided. Due to such gear engagement, when the upper blade lifting drive gear 381 is rotated in either direction by the operation of the upper blade lifting geared AC servo motor 39, this rotational drive is performed by the upper blade lifting relay gear 382. Is transmitted to the upper blade lifting gear 322, and the upper blade lifting gear 322 is rotated. Then, since the rotating upper blade elevating gear 322 is fixed in the vertical direction, the upper blade elevating screw 321 has a vertical motion corresponding to the rotational direction of the upper blade elevating gear 322 as a reaction of screw engagement between them. It can be moved upward or downward in the direction. Therefore, the vertical rod 32 provided with the upper blade lifting gear 322 is also moved upward or downward in the vertical direction.

  The upper blade touch sensor 50 and the lower blade touch sensor 60 constitute the above-described blade edge detection sensor, and are contact-type contact sensors. In the present invention, a normally closed type (B contact) sensor is preferably used. In the normally closed contact type contact type sensor, when the detection body contacts the contact at the tip of the sensor and presses the contact, the movable contact that has been in contact with the fixed contact is separated, and the closed circuit becomes an open circuit. When the detection body is separated from the contact, both contacts are brought into contact with each other by the spring, and the closed circuit is restored. The sensor outputs an on / off signal during such operation. According to such a touch sensor, since there is no snap action mechanism, extremely high operating point repeatability can be obtained (repetition accuracy of 0.5 μm). Moreover, it has the following advantages. Cost performance is good because the electrical circuit can be simplified. Since there is no amplifier circuit, there are no power supply voltage, temperature change, and drift with time. Since it is a contact type, it is less affected by dust, chips, and cutting fluid. The contact uses a gold-based special alloy and has a long precision life and high reliability. The contact protection circuit makes it easy to obtain high reliability against bad power supply environments and vibrations. Easy input to PC or CNC.

  Next, an operation for automatically adjusting the lap amount between the upper blade 10 and the lower blade 20 in the slitter apparatus having the above-described configuration will be described.

  First, as shown in FIGS. 7 and 8, the position of the cutting edge of the lower blade 20 depends on the diameter of the knife so that it is slightly above the progress line of the web to be cut, that is, the upper surface of the guide plate 42. Must always be constant. Therefore, when exchanging a knife, it is necessary to adjust the knife up and down according to the diameter of the knife to be exchanged. Such adjustment of the position of the lower blade 20 is performed by the lower blade raising / lowering geared AC servo motor 49 in the lower blade drive unit 40. That is, the lower blade shaft holder 43 is moved up and down along the linear bearing 47 by operating the lower blade lifting geared AC servo motor 49 to rotationally drive the gear in the lower blade lifting gear box 48. This is done by moving the lower blade shaft 44 up and down.

  On the other hand, the same adjustment is necessary for the upper blade 10, and such adjustment is performed by adjusting the vertical position of the upper blade 10 by the upper blade lifting geared AC servo motor 39 and the upper blade lifting gear box 38 connected thereto. This is done by adjusting. However, the upper blade holder 30 requires a detaching mechanism that lifts the upper blade 10 instantaneously to release the contact with the lower blade 20 when the web to be cut suddenly breaks. This is done by actuating the longitudinal detachable air cylinder 36 and the lateral detachable air cylinder 37 (the drive sources for these air cylinders are not shown). Each desorption amount is fixed by the cylinder stroke of each air cylinder.

  In order to keep the lap amount of the upper and lower blades constant when replacing the knife, it is first necessary to know the diameter of the knife to be replaced. Next, an operation for automatically measuring the knife diameter will be described.

  First, a case where the knife diameter of the upper blade is automatically measured will be described. The upper blade 10 is moved from the lower blade 20 by operating the lateral detachable air cylinder 37 and the vertical detachable air cylinder 36 in the detachable state. In this state, the knife is exchanged.

  As described above, the contact position of the tip of the upper blade touch sensor 50 arranged in the upper blade holder 30 is the maximum diameter that can be used in the slitter from the upper surface of the web to be cut in the slitter in this detached state position. Are arranged at a reference point separated by a distance (A1 + R1) equal to a value obtained by adding a predetermined margin value R1 to the blade tip diameter A1. The distance value (A1 + R1) of the reference point is input by the input unit of the upper blade lifting distance calculation device 81 and stored in the storage unit. In the state where the replacement knife (new knife) is held on the horizontal rod 34 by the upper blade attaching / detaching portion 35 in this detachable state position, the controller controls the drive source of the upper blade lifting / lowering motor drive control device 80. The upper blade lifting gear 322 is rotated in a predetermined direction via the upper blade lifting gear box 38 by energizing the upper blade lifting geared AC servo motor 39 under the control. As a result, the upper blade lifting / lowering screw 321 is raised, and therefore the longitudinal rod 32 is raised, and thus the replacement knife (new upper blade 10) is raised, and the cutting edge is touched by the upper blade. The contact of the tip of the sensor 50 is approached. Thus, when the blade edge of the replaced upper blade 10 comes into contact with the contact at the tip of the upper blade touch sensor 50 and a blade edge detection signal is output from the upper blade touch sensor 50, the upper blade lifting distance calculation device 81 This is instructed to the control unit of the blade drive motor drive control device 80 to stop the energization of the upper blade lift geared AC servo motor 39 and the upper blade lift geared AC servo motor 39 required so far. Is received and stored in the storage unit. And the calculating part of the upper blade raising / lowering distance calculating device 81 calculates the moving amount of the blade edge of the replacement knife based on the rotational speed of the servo motor 39 stored in the storage unit, and further, the calculated moving amount, The diameter of the replacement knife is calculated based on the distance value (A1 + R1) stored in the storage unit.

  Next, in order to describe a case where the knife diameter of the lower blade is automatically measured, the lower blade attaching / detaching portion 45 is operated to replace the knife. The contact position of the tip of the lower blade touch sensor 60 arranged in the lower blade drive unit 40 is such that the blade tip diameter A2 of the largest knife that can be used in the slitter from the lower surface of the web to be cut in the slitter in this attachment / detachment position. Are arranged at reference points separated by a distance (A2 + R2) equal to a value obtained by adding a predetermined margin value R2. The distance value (A2 + R2) of the reference point is input by the input unit of the lower blade lifting distance calculation device 91 and stored in the storage unit. In the state where the lower knife 44 is held by the lower blade attaching / detaching portion 45 at this attaching / detaching position, the lower blade lifting / lowering motor drive control device 90 is driven by the controller. By energizing the lower blade raising / lowering geared AC servo motor 49 under the control, the lower blade shaft holding portion 43 is lowered along the linear bearing 47 via the lower blade raising / lowering gear box 48. The lower blade 44 is lowered, and thus the replacement knife (new lower blade 20) is lowered, and the blade tip approaches the contact at the tip of the lower blade touch sensor 60. Thus, when the blade edge of the replaced lower blade 20 comes into contact with the contact at the tip of the lower blade touch sensor 60 and a blade edge detection signal is output from the lower blade touch sensor 60, the lower blade lifting distance calculation device 91 This is instructed to the control unit of the blade raising / lowering motor drive control device 90 to stop the energization of the lower blade raising / lowering geared AC servomotor 49, and the lower blade raising / lowering geared AC servomotor 49 required so far is also stopped. Is received and stored in the storage unit. And the calculating part of the lower blade raising / lowering distance calculating device 91 calculates the moving amount of the cutting edge of the replacement knife based on the rotation speed of the servo motor 49 stored in the storage unit, and further, the calculated moving amount, The diameter of the replacement knife is calculated based on the distance value (A2 + R2) stored in the storage unit.

  In the above-described embodiment, the blade edge is moved relative to the blade edge detection sensor to automatically measure the replacement knife diameter. However, the present invention is not limited to this, and the blade edge detection sensor is not limited to this. Similarly, the diameter of the replacement knife can be automatically measured even when the blade is moved with respect to the blade edge. FIG. 10 is a view schematically showing an example in which such an embodiment is applied to the upper blade holder 30. The structure of most of the upper blade holder 30 is the same as that described above with reference to FIGS. 7 to 9 and will not be described again here.

  In the embodiment of FIG. 10, a linear scale 70 is attached to the upper blade holder support portion 31 via a linear scale support portion 71, and an upper blade touch sensor 50 is attached to the lower end of the linear scale 70. ing. A linear scale drive control device 72 is disposed between the linear scale 70 and the upper blade touch sensor 50.

  Next, a case where the knife diameter of the upper blade is automatically measured in such a configuration will be described. The lateral detachable air cylinder 37 and the longitudinal detachable air cylinder 36 are operated in a detachable state, It is the same as in the above-described embodiment that the blade 10 is positioned away from the lower blade 20 and is positioned above, and in this state, the knife is replaced. As described above, the contact position of the tip of the upper blade touch sensor 50 arranged in the upper blade holder 30 is the maximum diameter that can be used in the slitter from the upper surface of the web to be cut in the slitter in this detached state position. Are arranged at reference points separated by a distance (A3 + R3) equal to a value obtained by adding a predetermined margin value R3 to the blade tip diameter A3. In this detached state, in the state where the replacement knife (new knife) is held by the upper blade attaching / detaching portion 35 on the horizontal rod 34, the linear scale 70 is driven by the linear scale drive control device 72, and the upper The contact at the tip of the blade touch sensor 50 is moved relative to the cutting edge of the replacement knife 10. Thus, when the contact of the tip of the upper blade touch sensor 50 comes into contact with the blade edge of the replaced upper blade 10 and the blade edge detection signal is output from the upper blade touch sensor 50, the linear scale drive control device 72 is Then, the movement of the linear scale 70 is stopped. Then, the amount of movement of the contact of the upper blade touch sensor 50 is read by the linear scale 70, and the diameter of the replacement knife is calculated based on the above-mentioned distance (A3 + R3).

  Next, a method for automatically adjusting the lap amount of the upper and lower blades to a desired value will be described. After the knife diameter is automatically measured by the method described above, if the lower blade is a saddle blade, the knife center The position of the lower blade is automatically adjusted so that the distance to the web surface is half of the knife diameter, and in the case of a dish-type blade, (knife diameter + lap amount) × 1/2. . In this case, the reference point may be the origin of the operating point of the aforementioned blade edge detection sensor. Such adjustment of the lower blade position can be performed by energizing and controlling the lower blade lifting geared AC servo motor 49 as described above.

  For the upper blade, the upper blade holder 30 is once removed, and the position of the knife center is automatically adjusted so that [(knife diameter + lap amount) × 1/2 + (detachment amount)]. Such adjustment of the upper blade position can be performed by controlling the bias of the upper blade lifting geared AC servo motor 39 in the same manner as described above.

  To explain another method of the present invention, if only the lap amount before replacement is held, the knife diameter before replacement is used as the counter of the upper blade lifting distance calculation device 81 or the lower blade lifting distance calculation device 91. If it is memorized and displayed, and the value that is twice the amount of knife movement is added to or subtracted from the counter value, then if the knife is moved until the value is equal to the knife diameter to be replaced, The amount of lap before replacement can be obtained. In this case, although it is necessary to measure the knife diameter with a scale such as a caliper in advance, it is a practical method that can be recommended as a semi-automatic method without much trouble by applying the scale to the knife blade.

  According to the present invention, in a shear-cut type slitter using a round blade, the diameter of the replacement knife can be measured automatically or semi-automatically, and the lap amount of the upper and lower blades can be automatically adjusted. Is greatly simplified. Moreover, even if it is not a skilled worker, knife replacement | exchange can be performed easily without a problem.

It is a figure which shows schematically the combination of a pair of knives in the shear cut type slitter of a scissors type blade and a plate type blade. It is a figure which shows schematically the combination of a pair of knives in the shear-cut type slitter of a plate-type blade and a plate-type blade. It is the schematic for demonstrating the contact pressure of a pair of knives. It is the schematic for demonstrating the toe-in angle of a pair of knives. It is the schematic for demonstrating the offset between a pair of knives. It is a schematic diagram for explaining the amount of lap between a pair of knives. It is a front view which shows schematically the structure of the slitter apparatus as one Example of this invention which implements the lapping amount adjustment method of this invention. FIG. 8 is a side view schematically showing the configuration of the slitter device of FIG. 7. It is a partially broken side view for demonstrating the detailed structure of the upper blade holder in the slitter apparatus of FIG. It is a figure similar to FIG. 9 for demonstrating the detailed structure of the upper blade holder in the slitter apparatus as another Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Upper blade 20 Lower blade 30 Upper blade holder 31 Upper blade holder support part 32 Longitudinal rod 33 Lateral rod holding part 34 Lateral rod 35 Upper blade attaching / detaching part 36 Longitudinal demounting air cylinder 37 Lateral demounting air cylinder 38 Gear box for raising / lowering the upper blade 39 Geared AC server motor for raising / lowering the upper blade 40 Lower blade drive unit 41 Lower blade drive unit base frame 42 Guide plate 43 Lower blade shaft holding portion 44 Lower blade shaft 45 Lower blade attaching / detaching portion 46 Lower blade driving motor 47 Near bearing 48 Gear box for raising and lowering lower blade 49 Geared AC servo motor for raising and lowering lower blade 50 Touch sensor for upper blade 51 Touch sensor support for upper blade 60 Touch sensor for lower blade 61 Touch sensor support for lower blade 70 Linear scale 71 linear Scale support part 72 Linear scale drive control device 80 Upper blade lifting / lowering motor drive control device 81 Upper blade lifting / lowering distance calculation device 90 Lower blade lifting / lowering motor drive control device 91 Lower blade lifting / lowering distance calculation device 311 Linear bearing 321 Upper blade lifting / lowering Screw 322 Upper blade lifting gear 331 Linear bearing 381 Upper blade lifting drive gear 382 Upper blade lifting relay gear

Claims (6)

In a method of automatically measuring the diameter of a knife in a shear cut type slitter using a dish type blade having a sharp edge, the maximum diameter that can be used in the slitter is determined from the web surface to be cut in the slitter. A contact-type edge detection sensor is arranged at a reference point that is a distance equal to a value obtained by adding a predetermined margin value to the edge diameter of the knife, and the position of the new knife when the current knife is replaced with the new knife The new knife is moved toward the cutting edge detection sensor until the cutting edge of the new knife comes into contact with the cutting edge detection sensor disposed opposite to the cutting edge and is detected by the cutting edge detection sensor. Based on the distance and the reference point position, the diameter of the new knife is calculated,
The blade edge detection sensor is provided individually corresponding to a holding portion that holds the knife,
The blade edge detection sensor includes a movable contact and a fixed contact provided inside the blade edge detection sensor and in contact with each other when the knife as a detection body presses a contact provided at a tip of the blade edge detection sensor. Separating the closed circuit into an open circuit, and when the knife, which is the detection body, is separated from the contact, the movable contact and the fixed contact are contacted by a spring to make the open circuit a closed circuit. A normally closed sensor configured to output an on / off signal by performing an operation,
A method characterized by that. In a method of automatically measuring the diameter of a knife in a shear cut type slitter using a dish type blade having a sharp edge, the maximum diameter that can be used in the slitter is determined from the web surface to be cut in the slitter. A contact-type edge detection sensor is arranged at a reference point that is a distance equal to a value obtained by adding a predetermined margin to the edge diameter of the knife, and the edge of the new knife when the current knife is replaced with a new knife The blade edge detection sensor is moved toward the new knife until it comes into contact with the blade edge detection sensor disposed opposite to the blade edge and is detected by the blade edge detection sensor, and the movement distance of the blade edge detection sensor and the reference point The diameter of the new knife is calculated based on the position,
The blade edge detection sensor is provided individually corresponding to a holding portion that holds the knife,
The blade edge detection sensor includes a movable contact and a fixed contact provided inside the blade edge detection sensor and in contact with each other when the knife as a detection body presses a contact provided at a tip of the blade edge detection sensor. Separating the closed circuit into an open circuit, and when the knife, which is the detection body, is separated from the contact, the movable contact and the fixed contact are contacted by a spring to make the open circuit a closed circuit. A normally closed sensor configured to output an on / off signal by performing an operation,
A method characterized by that. Contact type cutting edge detection sensor disposed at a predetermined reference point position of an upper blade holder and / or a lower blade drive unit in a lap amount adjusting device for a shear-cut slitter using a dish type blade having a sharp edge. A knife moving means for moving the blade edge of the exchange knife relative to the blade edge detection sensor, a knife movement control means for controlling the operation of the knife movement means, and an exchange knife for calculating the diameter of the exchange knife A diameter calculating means, and the knife movement control means controls the knife moving means at the time of exchanging the knife and determines the cutting edge of the new knife from the position of the new knife when the new knife is replaced with a new knife. Until the blade tip detection sensor is in contact with the blade tip detection sensor disposed opposite the blade tip and detected by the blade tip detection sensor. The replacement knife diameter calculating means calculates the diameter of the new knife based on the movement distance of the new knife and the reference point position, and the knife movement control means Is configured to control the knife moving means based on the diameter of the new knife obtained by the calculation so that a distance corresponding to half of the desired wrap amount is separated between the blade edge of the new knife and the web surface. The desired wrap amount is obtained by moving the new knife to
The blade edge detection sensor is provided individually corresponding to a holding portion that holds the knife,
The blade edge detection sensor includes a movable contact and a fixed contact provided inside the blade edge detection sensor and in contact with each other when the knife as a detection body presses a contact provided at a tip of the blade edge detection sensor. Separating the closed circuit into an open circuit, and when the knife, which is the detection body, is separated from the contact, the movable contact and the fixed contact are contacted by a spring to make the open circuit a closed circuit. A normally closed sensor configured to output an on / off signal by performing an operation,
A lap adjusting device characterized by that.   The lap adjustment device according to claim 3, wherein the blade edge detection sensor is a normally closed touch sensor, and the knife moving means includes a servo motor. Contact type cutting edge detection sensor disposed at a predetermined reference point position of an upper blade holder and / or a lower blade drive unit in a lap amount adjusting device for a shear-cut slitter using a dish type blade having a sharp edge. A sensor moving means for moving the blade edge detection sensor relative to the blade edge of the replacement knife, a sensor movement control means for controlling the operation of the sensor moving means, and an exchange knife for obtaining the diameter of the exchange knife by calculation A diameter calculating means and a knife moving means are provided, and the sensor movement control means controls the sensor moving means so that the cutting edge of the new knife faces the cutting edge when the current knife is replaced with a new knife. The blade edge detection sensor until the blade edge detection sensor is in contact with the blade edge detection sensor and is detected by the blade edge detection sensor The replacement knife diameter calculating means calculates the diameter of the new knife based on the moving distance of the blade edge detection sensor and the reference point position, and the knife moving means The desired knife is moved by moving the knife so that a distance corresponding to half of the desired wrap amount is separated between the cutting edge of the new knife and the web surface based on the diameter of the new knife obtained by calculation. The amount of lap is to be obtained,
The blade edge detection sensor is provided individually corresponding to a holding portion that holds the knife,
The blade edge detection sensor includes a movable contact and a fixed contact provided inside the blade edge detection sensor and in contact with each other when the knife as a detection body presses a contact provided at a tip of the blade edge detection sensor. Separating the closed circuit into an open circuit, and when the knife, which is the detection body, is separated from the contact, the movable contact and the fixed contact are contacted by a spring to make the open circuit a closed circuit. A normally closed sensor configured to output an on / off signal by performing an operation,
A lap adjusting device characterized by that.   The lap adjustment device according to claim 5, wherein the blade edge detection sensor is a normally closed touch sensor, and the sensor moving means includes a linear scale having the blade edge detection sensor attached to a tip.

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