JP2005081532A - Toe-in adjusting mechanism of shear cutting slitter by circular blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toe-in adjusting mechanism capable of adjusting a toe-in angle even at operation. <P>SOLUTION: The toe-in adjusting mechanism is equipped with a stator provided on a holder mounting part side for mounting a circular blade holder, an assembling means for assembling a circular blade supporting member supporting the circular blade of the circular holder around an axis thereof to be rotatable with respect to the stator, and a holding means for holding the circular blade supporting member so that a predetermined toe-in angle is given to the stator. The holding means includes a strong spring fastened between the stator and the circular blade supporting member, and a toe-in adjusting screw for fastening the circular blade supporting member with respect to the stator against the elastic force of the strong spring. By operating the toe-in adjusting screw, the fastening force is increased and decreased in the range of the elastic force of the strong spring by which the fastening force is always actuated to the fixed direction, and thereby the circular blade supporting member is turned and the fine adjustment of the toe-in angle can be performed while preventing the backlash of the screw. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mechanism for adjusting a toe-in angle in a slitter apparatus using a round blade for cutting a sheet in the width direction.

  In a shear cut slitter or the like using a round blade, one of important factors for improving the sharpness of the sheet and maintaining the quality of the cut surface is a toe-in angle that is an engagement angle of the upper blade with the lower blade. Conventionally, various slitter devices provided with an adjusting mechanism for adjusting such a toe-in angle have been developed and used. In these conventional slitter devices, there are those disclosed in, for example, Japanese Utility Model Publication Nos. 56-20791 and 56-20792 which can adjust the toe-in angle. The toe-in angle adjusting mechanisms disclosed in these publications are provided with a toe-in angle adjusting member at the upper end of the upper blade support shaft, and the shaft is operated by operating the toe-in angle adjusting member while looking at the scale indicating the toe-in angle. The toe-in angle can be adjusted by rotating the fixed mounting member.

Japanese Utility Model Publication No. 56-20791 Japanese Utility Model Publication No. 56-20792

  In the conventional toe-in adjusting mechanism as described above, adjustment during operation (sheet cutting) is impossible, and it is necessary to stop the machine every time adjustment is performed. The toe-in angle of the shear-cut slitter with a round blade requires extremely delicate adjustment, and until the satisfactory cutting surface is obtained, the toe-in angle is adjusted appropriately through trial and error, and the machine is stopped repeatedly each time. Needed.

  On the other hand, the numerical value of the toe-in angle as proposed in Japanese Patent Application No. 2003-140304 filed earlier by the present applicant is first determined by trial and error and obtaining the best cut surface. The purpose is to use the numerical value of the toe-in angle at that time for the next work.

  Therefore, to adjust the toe-in angle at the trial and error stage, there has been a strong demand for a toe-in angle adjusting mechanism that can change the toe-in angle in various ways while observing the cut surface during sheet cutting. In addition, the toe-in angle adjusting mechanism has been required to be as simple as possible.

  An object of the present invention is to provide a toe-in adjusting mechanism which can solve the problems of the prior art as described above and can sufficiently meet the strong demand as described above.

  According to the present invention, in a toe-in adjusting mechanism of a shear cut slitter using a round blade, a stator provided on the holder mounting portion side for mounting the round blade holder, and a round for supporting the round blade of the round blade holder. An assembling means for assembling the blade supporting member so as to be rotatable with respect to the stator around the axial center thereof, and a predetermined toe-in angle with respect to the stator is given to the round blade supporting member. Holding means, and the holding means is a strong spring sandwiched between the stator and the round blade support member, and the stator against the elastic force of the strong spring. A toe-in adjusting screw for fastening the round blade support member to the inner edge of the strong spring, and by operating the toe-in adjusting screw, the fastening force always acts in a certain direction within the range of the elastic force of the strong spring. There is provided a toe-in adjusting mechanism characterized in that fine adjustment of a toe-in angle can be performed by rotating the round blade support member while preventing occurrence of screw backlash by increasing or decreasing the fastening force. The

  According to one embodiment of the present invention, the round blade support member is a plate, and the toe-in adjusting screw is disposed on the downstream side of the sheet to be cut with respect to the plate.

  According to another embodiment of the present invention, the round blade support member is a rod, and the toe-in adjusting screw is disposed in the periphery of the rod.

  According to still another embodiment of the present invention, the strong spring is a dish washer.

  According to still another embodiment of the present invention, the strong spring is a spring washer.

  According to still another embodiment of the present invention, a plus or minus groove is formed in the head of the toe-in adjusting screw.

  Since the toe-in angle can be adjusted very easily even during the cutting of the sheet, the cut surface of the sheet to be cut can be checked, and the toe-in angle can be changed to obtain the desired quality. Therefore, as compared with the conventional case where it is necessary to find out the toe-in angle at which the best cutting quality is obtained by trial and error by repeatedly operating and stopping the slitter device, the working efficiency can be improved. Moreover, the optimum toe-in angle can be found very easily.

  Next, based on an accompanying drawing, the present invention is explained in detail about an embodiment and an example of the present invention.

  FIG. 1 of the accompanying drawings is a front view showing the whole plate type upper blade holder in which the toe-in adjusting mechanism according to the present invention is implemented, and FIG. 2 is a side view showing the whole upper blade holder of FIG. As shown well in FIGS. 1 and 2, this plate-type upper blade holder is mounted and fixed to a holder mounting portion 1 of a slitter device, and an air cylinder for causing the upper blade knife 2 of a round blade to move up and down. 12 is provided. A stator 13 is fixed to the lower end of the air cylinder 12, and a plate 11 for holding the upper blade knife 2 is attached to the stator 13 so as to be rotatable around the shaft 14. Yes. As will be described in detail later, the plate 11 uses a toe-in adjusting screw 15 and a strong spring 16 to thereby provide a predetermined rotational angle position (predetermined with respect to the axis center of the shaft 14 during operation of the slitter device). Toe-in angle). A contact pressure sensor 17 for detecting contact pressure between the upper blade and the lower blade in the slitter device is attached to the plate 11.

  3 is a partial perspective view showing details of a mechanism for attaching the plate 11 to the stator 13 in the upper blade holder shown in FIGS. 1 and 2, that is, a toe-in adjusting mechanism, and FIG. 4 is a toe-in adjusting shown in FIG. It is a fragmentary sectional view which shows in detail the relationship between the stator 13, the plate 11, and the shaft 14 in a mechanism. As is well shown in the partial perspective view of FIG. 3, the stator 13 has an L-shaped cross section as a whole, and is used for attaching and fixing the shaft 14 to the center portion of the ceiling leg portion 13A. A shaft attachment fixing hole 13B is formed. On the other hand, a notch 13D is formed in the center of the vertical leg 13C, and a screw hole 13E for screwing the toe-in adjusting screw 15 is formed on each side of the notch 13D.

  In addition, a protrusion 11A that fits into a notch 13D formed in the vertical leg 13C of the stator 13 is provided at the center of one side of the top of the plate 11 (the side on which the upper blade knife 2 is mounted). Is provided. A shaft insertion hole 11B for passing the shaft 14 is formed at the center of the protruding portion 11A. Furthermore, screw insertion holes 11 </ b> C for passing the toe-in adjusting screws 15 are formed in the top portion of the plate 11 on both sides of the protruding portion 11 </ b> A.

  In order to assemble the plate 11 to the stator 13, first, as shown in the partial sectional view of FIG. 4, the protruding portion 11 </ b> A of the plate 11 is fitted into the notch 13 </ b> D of the stator 13. In this state, the shaft 14 is inserted into the shaft insertion hole 11B formed in the protruding portion 11A of the plate 11, and the tip of the shaft 14 is formed in the ceiling leg portion 13A of the stator 13, but the shaft attachment fixing hole 13B. As it is inserted, it is fixed using the set screw 13F. At this time, a nut engaging screw portion 14A is formed in the portion of the shaft 14 protruding from the lower end of the protruding portion 11A, and the nut engaging screw portion 14A is located between the lower surface of the protruding portion 11A. The clamping nut 18 is screwed so as to sandwich the spring washer 19.

  Next, the toe-in adjusting screw 15 is passed through the screw insertion hole 11 </ b> C formed in the plate 11 so that the strong spring 16 is sandwiched between the vertical leg portion 13 </ b> C of the stator 13 and the plate 11. Screw into a screw hole 13E formed in the leg 13C. Thereby, the assembly work of the plate 11 with respect to the stator 13 is completed temporarily.

  Next, a function for adjusting the toe-in angle in the toe-in adjusting mechanism having the above-described structure will be described in detail. By adjusting the screwing amount of the tightening nut 18 with respect to the nut engaging screw portion 14A of the shaft 14, the plate 11 is pressed against the lower surface of the ceiling leg portion 13A of the stator 13 with sufficient force, so Although the assembled state of the plate 11 can be maintained, the plate 11 can be of a level that allows the plate 11 to freely rotate to a predetermined rotational angle position with respect to the axial center of the shaft 14. As shown well in FIG. 4, the tightening nut 18 is restricted by the threaded portion of the shaft 14, and is not tightened below the dimension d indicating the half-tightening allowance.

  The plate 11 assembled so as to be able to rotate with respect to the stator 13 via the shaft 14 in this way has a right and left screwing amount to the screw hole 13E of the toe-in adjusting screw 15 on both sides of the protruding portion 11A of the plate 11. In the same case, the inner surface of the plate 11 is in parallel with the inner surface of the vertical leg 13C of the stator 13. In order to facilitate understanding, it is assumed that this state is a state where the toe-in angle is zero.

  In such a state where the toe-in angle is zero, the screwing amount of the toe-in adjusting screw 15 located on the upstream side of the cut sheet is left as it is, and the screwing amount of the toe-in adjusting screw 15 located on the downstream side is slightly reduced. To. Then, due to the elastic force of the strong spring 16 sandwiched therebetween, the downstream portion of the plate 11 is moved slightly outward, so that the inner side surface of the plate 11 is the vertical leg portion 13C of the stator 13. It will be slightly inclined with respect to the inner surface. Therefore, in this state, the upper blade knife 2 held by the plate 11 is engaged with the lower blade knife (not shown) with a certain toe-in angle. In order to easily adjust the screwing amount of the toe-in adjusting screw 15, an operator can turn the screw on the head of the toe-in adjusting screw 15 using a plus or minus type screwdriver. Thus, it is preferable that a plus groove or a minus groove is formed. Further, the diameter of the head may be sufficiently large so that it can be rotated with a finger.

  Here, the most important point in adjusting the toe-in angle during operation (during sheet cutting) is that extremely fine adjustment is possible. To that end, there should never be backlash associated with changing the toe-in angle. In the above-described embodiment of the present invention, the stator 13 and the plate 11 are fastened by the toe-in adjusting screw 15 via the strong spring 16, and the elastic spring 16 is within the elastic range regardless of the rotational direction of the toe-in adjusting screw 15. Is always free of backlash by applying a force in a certain direction. Therefore, the toe-in adjusting screw 15 is always directed in one direction within the range of elasticity of the strong spring 16, so that backlash does not occur in both the loose and loose directions, and the screw Very small adjustment is possible due to the characteristics of Moreover, the structure is extremely simple.

  In addition, as a specific example of the strong spring 16 used in the above-described embodiment, a dish washer, a spring washer, and the like can be used. However, important characteristics that the strong spring used in the present invention must have are as follows. It is a characteristic. That is, when the slitter device is stopped and during operation, unless the operator operates the toe-in adjusting screw 15, that is, unless the toe-in adjusting screw 15 is loosened or tightened, the inclination angle of the plate 11 with respect to the stator 13, that is, A sufficient holding force is provided so that the toe-in angle is not changed, but when the operator operates the toe-in adjusting screw 15, the inclination angle of the plate 11 with respect to the stator 13, that is, the toe-in angle is changed. It has sufficient strength to give a sufficient elastic force.

  Next, another embodiment of the present invention will be described. FIG. 5 is a front view showing an entire rod type upper blade holder in which the toe-in adjusting mechanism according to the present invention is implemented, and FIG. 6 is a side view showing the entire upper blade holder of FIG. As well shown in FIGS. 5 and 6, this rod type upper blade holder is mounted and fixed on the holder mounting portion 3 of the slitter device, and an air cylinder for moving the upper blade knife 4 of the round blade up and down. 22 is provided. The upper and lower ends of the air cylinder 12 are covered with a cylinder cover 22A. A stator 23 is integrally provided on the upper cylinder cover 22A. A rod 24 for holding the upper knife 4 at the lower end extends through the air cylinder 22. A part of the rod 24 is a spline shaft 24A or a shaft having a sliding key structure, and rotates together with the spline nut cover 24B. As will be described in detail later, the spline nut cover 24A uses a toe-in adjusting screw 25 and a strong spring 26, so that a predetermined rotation angle position (predetermined with respect to the axial center of the rod 24) is maintained during operation of the slitter device. Toe-in angle). A contact pressure sensor 27 for detecting contact pressure between the upper blade and the lower blade in the slitter device is attached to the rod 24.

  7 is a partial plan view showing details of a mechanism for attaching the rod 24 to the stator 23 in the upper blade holder shown in FIGS. 5 and 6, that is, a toe-in adjusting mechanism, and FIG. 8 is a toe-in adjusting mechanism of FIG. It is a partial front view which shows the detail of. FIG. 9 is a partial sectional view showing in detail the relationship between the upper cylinder cover 22A and the spline nut cover 24B in the toe-in adjusting mechanism shown in FIGS. As shown in FIGS. 7 and 8, a screw hole 24C for screwing the toe-in adjusting screw 25 is formed at a position facing the stator 23 of the spline nut cover 24B. On the other hand, the stator 23 is formed with a screw insertion hole 23A through which the toe-in adjusting screw 25 is passed.

  On the other hand, as is well shown in the partial plan view of FIG. 7 and the partial cross-sectional view of FIG. 9, elongated slots 24D for passing the mounting bolts 21 are formed at three places around the lower end of the spline nut cover 24B. A screw hole 22B for screwing the mounting bolt 21 is formed at a corresponding position of the upper cylinder cover 22A.

  In order to assemble the rod 24 to the stator 23, first, as well shown in the partial sectional view of FIG. 9, the elongated slot 24D of the spline nut cover 24B is respectively inserted into the screw hole 22B of the upper cylinder cover 22A. As a matching arrangement, the mounting bolts 21 are screwed into the screw holes 22B through the elongated slots 24D. At this time, the spring washer 29 is sandwiched.

  Next, the toe-in adjusting screw 25 is passed through the screw insertion hole 23A formed in the stator 23 so that the strong spring 26 is sandwiched between the stator 23 and the spline nut cover 24B opposed to the spline nut cover 22A. Screw into the formed screw hole 24C. Thereby, the assembly | attachment operation | work of the rod 24 with respect to the stator 23 will be completed temporarily.

  Next, a function for adjusting the toe-in angle in the toe-in adjusting mechanism having the above-described structure will be described in detail. By adjusting the screwing amount of the mounting bolt 21 into the screw hole 22B, the spline nut cover 24B is pressed against the upper surface of the upper cylinder cover 22A with sufficient force, and the assembled state of the rod 24 with respect to the stator 23 can be maintained. However, it is possible to allow the rod 24 to freely rotate to a predetermined rotational angle position with respect to the axis center. In this case, as well shown in FIG. 9, the upper cylinder cover 22A and the spline nut cover 24B are attached in consideration of the dimension “a” of the mounting bolt 21 and the dimension “d” so that the spring washer 29 is not cut off. It is good to keep. By doing so, the spline nut cover 24B is attached to the upper cylinder cover 22A in a rotatable state by operation of the toe-in adjusting screw 25 as will be described later. That is, the spline nut cover 24B is attached to the upper cylinder cover 22A in a semi-tightened state by the mounting bolt 21 and the spring washer 29, and is slidable between surfaces within the elongated slot 24D. .

  Thus, the rod 24 assembled so as to be rotatable with respect to the stator 23 is held at the lower end portion of the rod 24 when the screwing amount of the toe-in adjusting screw 25 into the screw hole 24C is set to a predetermined amount. Assume that the engagement inclination angle with respect to the lower knife of the upper knife 4 is zero, that is, the toe-in angle is zero.

  In such a state where the toe-in angle is zero, the screwing amount of the toe-in adjusting screw 25 is slightly reduced. Then, the spline nut cover 24B slightly slides with respect to the upper cylinder cover 22A due to the elastic force of the strong spring 26 sandwiched therebetween, so that the rod 24 is slightly rotated about its axis. Become. Accordingly, the upper blade knife 4 held at the lower end of the rod 24 is engaged with the lower blade knife (not shown) with a certain toe-in angle. In order to make it easy to adjust the screwing amount of the toe-in adjusting screw 25, an operator can turn the screw on the head of the toe-in adjusting screw 25 using a plus or minus screwdriver. It is preferable that a minus groove or a plus groove is formed.

  As described in the description of the embodiment of FIGS. 1 to 4, the most important point in adjusting the toe-in angle during operation (cutting the sheet) is that extremely fine adjustment is possible. To that end, there should never be backlash associated with changing the toe-in angle. In this embodiment of the present invention, the stator 23 and the spline nut cover 24B are fastened by a toe-in adjusting screw 25 via a strong spring 26, and the elastic range of the strong spring 26 is independent of the rotational direction of the toe-in adjusting screw 25. Inside, it is always backlash-free so that force is applied in a certain direction. Therefore, the toe-in adjusting screw 25 is always directed in one direction within the range of elasticity of the strong spring 26, so that backlash does not occur in both the loose and loose directions, and the screw Very small adjustment is possible due to the characteristics of Moreover, the structure is extremely simple.

  In addition, as a specific example of the strong spring 16 used in this embodiment, a dish washer, a spring washer, and the like can be used, but important characteristics that the strong spring used in the present invention must have are as described above. is there.

  Since the toe-in angle can be adjusted very easily even during the cutting of the sheet, the cut surface of the sheet to be cut can be checked, and the toe-in angle can be changed to obtain the desired quality. Therefore, as compared with the conventional case where it is necessary to find out the toe-in angle at which the best cutting quality is obtained by trial and error by repeatedly operating and stopping the slitter device, the working efficiency can be improved. Moreover, the optimum toe-in angle can be found very easily.

It is a front view which shows the whole plate type upper blade holder which implemented the toe-in adjustment mechanism by this invention. It is a side view which shows the whole upper blade holder of FIG. FIG. 3 is a partial perspective view showing details of a mechanism for attaching a plate to a stator in the upper blade holder shown in FIGS. 1 and 2. FIG. 4 is a partial cross-sectional view showing in detail a relationship among a stator, a plate, and a shaft in the toe-in adjusting mechanism shown in FIG. 3. It is a front view which shows the whole rod-type upper blade holder which implemented the toe-in adjustment mechanism by this invention. It is a side view which shows the whole upper blade holder of FIG. FIG. 7 is a partial plan view showing details of a mechanism for attaching a rod to a stator in the upper blade holder shown in FIGS. 5 and 6. It is a partial front view which shows the detail of the toe-in adjustment mechanism of FIG. FIG. 9 is a partial cross-sectional view showing in detail a relationship between an upper cylinder cover and a spline nut cover in the toe-in adjusting mechanism shown in FIGS. 7 and 8.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holder attachment part 2 Upper blade knife 11 Plate 11A Protrusion part 11B Shaft insertion hole 11C Screw insertion hole 12 Air cylinder 13 Stator 13A Ceiling leg part 13B Shaft attachment fixing hole 13C Vertical leg part 13D Notch part 13E Screw hole 13F Set screw DESCRIPTION OF SYMBOLS 14 Shaft 14A Nut engagement screw part 15 Toe-in adjustment screw 16 Strong spring 17 Contact pressure sensor 18 Tightening nut 19 Spring washer

Claims (6)

  In a toe-in adjustment mechanism for a shear cut slitter using a round blade, a stator provided on the holder mounting portion side for attaching the round blade holder, and a round blade support member for supporting the round blade of the round blade holder are provided. Assembling means for assembling so as to be rotatable with respect to the stator around the axis center, and holding means for holding the round blade support member so as to give a predetermined toe-in angle to the stator The holding means includes a strong spring sandwiched between the stator and the round blade support member, and the round blade against the stator against the elastic force of the strong spring. A toe-in adjusting screw for fastening the support member, and by operating the toe-in adjusting screw, the fastening force is increased or decreased within the range of the elastic force of the strong spring that always works in a certain direction. While preventing the occurrence of backlash of the screw in Rukoto, toe adjustment mechanism, characterized in that the said circular blade support member to allow the fine adjustment of the toe angle is rotated.   The toe-in adjusting mechanism according to claim 1, wherein the round blade support member is a plate, and the toe-in adjusting screw is disposed on a downstream side of a sheet to be cut with respect to the plate.   The toe-in adjustment mechanism according to claim 1, wherein the round blade support member is a rod, and the toe-in adjustment screw is disposed at a peripheral portion with respect to the rod.   4. The toe-in adjusting mechanism according to claim 1, wherein the strong spring is a dish washer.   4. The toe-in adjusting mechanism according to claim 1, wherein the strong spring is a spring washer.   The toe-in adjusting mechanism according to any one of claims 1 to 5, wherein a plus or minus groove is formed in a head of the toe-in adjusting screw.

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