JP4357407B2 - Slitter's round blade mounting device - Google Patents

Description

  The present invention relates to a slitter for slitting a web material such as paper or plastic film, and more particularly to a round blade attaching apparatus thereof.

  Prior to this application, the applicant developed and proposed a specially configured round blade attachment device. That is described in Japanese Patent Application Laid-Open No. 2003-181790 (Patent Document 1).

  In the apparatus of the publication, a central hole is formed in the round blade. Furthermore, an axial groove is formed on the outer peripheral surface of the support shaft, and an inward protruding portion is formed on the periphery of the center hole. The axial groove has a bottom surface having an arcuate cross section, and the inwardly protruding portion has a shape corresponding to the axial groove and is fitted into the axial groove. For example, around the spindle, three axial grooves are formed at angular intervals, three inwardly protruding portions are formed at angular intervals, and each inwardly protruding portion is fitted into each axial groove. The Therefore, when the web material comes into contact with the edge of the round blade, the round blade rotates integrally with the support shaft, and the web material is slit by the round blade. The round blade does not idle along the outer peripheral surface of the support shaft, and the support shaft is shaved and not damaged by the round blade.

  By the way, in the case of a slitter round blade mounting device, vertical and horizontal blurring of round blades are particularly important. Vertical runout refers to runout of the round blade in the radial direction. Lateral runout is runout in the axial direction of the round blade. When vertical runout or lateral runout occurs in the round blade during rotation, the web material cannot be accurately slit. Therefore, even in the apparatus disclosed in the above publication, it is necessary to prevent the vertical and horizontal shakes from occurring on the round blade.

  However, with regard to the vertical runout of the round blade, in the apparatus disclosed in the above publication, the inwardly protruding portion of the round blade is only fitted into the axial groove of the support shaft. Therefore, it is necessary to center the round blade and the support shaft so that vertical deflection does not occur in the round blade, but the problem is the roundness of the axial groove with respect to the center line of the support shaft. In order to center the round blade and the support shaft, each axial groove must be precisely machined so that the axial groove has roundness, and the machining accuracy of the axial groove is required. Furthermore, the roundness of the inwardly protruding portion with respect to the center line of the round blade is also a problem. The inward projecting portion must be precisely machined, the inward projecting portion must be rounded, the inward projecting portion and the axial groove must be precisely fitted, and the processing accuracy of the inward projecting portion is also required.

  In addition, with respect to the lateral shake, in the device disclosed in the above publication, the support shaft has a flange that contacts the round blade. Further, a screw groove is formed on the outer peripheral surface of the support shaft, the nut is screwed into the screw groove, pressed against the round blade, and the round blade is sandwiched between the nut and the flange. Accordingly, the round blade is fixed by the nut and the flange, and no side shake occurs in the round blade.

Therefore, according to the present invention, in the round blade mounting device of the slitter, the support shaft is shaved and prevented from being damaged by the round blade, and the round blade and the support shaft are accurately centered, and the round blade is vertically shaken. In addition, the object is to eliminate the problem of processing accuracy.
JP 2003-181790 A

According to this invention, the center hole is formed in the round blade, and the center hole of the round blade is directly fitted to the outer peripheral surface of the support shaft, whereby the round blade is centered. Further, the axial groove on the outer peripheral surface of the support shaft is formed, inwardly projecting portion is formed on the periphery of the central hole, the inwardly projecting portion of the center hole is inserted in the axial direction groove of the support shaft, the round blade supporting Rotates integrally with the shaft. Further, the support shaft has a flange that contacts the round blade. Further, a screw groove is formed on the outer peripheral surface of the support shaft, the nut is screwed into the screw groove, pressed against the round blade, the round blade is sandwiched between the nut and the flange, and the round blade is fixed by the nut and the flange. . Furthermore, according to the present invention, the support shaft has a first portion adjacent to the flange. Further, the support shaft has a second portion continuous with the first portion, and the second portion has an outer diameter smaller than that of the first portion. Then, the center hole of the round blade is fitted to the outer peripheral surface of the first part, a screw groove is formed on the outer peripheral surface of the second part, and a nut is screwed to the screw groove. The nut has a hollow cylindrical tip portion, and the cylindrical tip portion has an inner diameter larger than that of the first portion and is pressed against the round blade, thereby fixing the round blade.

  In a preferred embodiment, three axial grooves are formed at angular intervals around the support shaft, three inwardly protruding portions are formed at angular intervals, and each inwardly protruding portion is formed at each axial groove. Inserted into. Therefore, at the angular position between each axial groove, the center hole is fitted to the outer peripheral surface of the support shaft, and the round blade is supported at three points by the outer peripheral surface of the support shaft.

  The axial groove has a bottom surface with an arcuate cross section, and the inwardly protruding portion has a shape corresponding to the axial groove.

  Examples of the present invention will be described below.

  FIG. 1 shows an apparatus according to the present invention. This device is a slitter round blade mounting device and has a spindle 1. The support shaft 1 is for attaching the round blade 2 and is combined with the arm 3, and as shown in FIG. 2, the arm 3 is provided with a bearing 4, and the support shaft 1 is supported by the bearing 4 and is rotatable. It is guided to. Further, the arm 3 and the holder 6 are connected by the bolt 5, the arm 3 is supported by the holder 6 and the bolt 5, and can swing around the bolt 5, as in the device of Japanese Patent Laid-Open No. 2003-181790. is there. Further, a slot 7 is formed in the arm 3 around the bolt 5, and a clamp handle 8 passes through the slot 7 and is screwed to the holder 6, and the arm 3 is swung around the bolt 5 at any angle. In position, the arm 3 can be clamped and fixed by the clamp handle 8. It is also possible to remove the bolt 5 and the clamp handle 8 from the arm 3 and the holder 6 and thereby remove the arm 3.

  The round blade 2 is for slitting a web material 9 such as paper or plastic film, and has a blade edge 10. In this apparatus, in a plurality of arms 3, the support shafts 1 are combined and the round blade 2 is attached. Further, in the plurality of holders 6, the arms 3 are combined and supported, and the arms 3 are arranged at intervals. Further, for example, the web material 9 is fed along the outer peripheral surface of the roller 11, and in each arm 3, the arm 3 and the round blade 2 are arranged in parallel with the feed direction X of the web material 9. Accordingly, the web material 9 comes into contact with the cutting edge 10 of the round blade 2, and the round blade 2 and the support shaft 1 are rotated by the friction. As a result, the web material 9 is slit.

  Next, regarding the relationship between the round blade 2 and the support shaft 1, as shown in FIGS. 3, 4, and 5, the center hole 12 is formed in the round blade 2, and the center hole 12 is formed on the outer peripheral surface of the support shaft 1. The round blade 2 is centered by this. Further, an axial groove 13 is formed on the outer peripheral surface of the support shaft 1, an inward protruding portion 14 is formed on the periphery of the center hole 12, and an inward protruding portion 14 is inserted into the axial groove 13 of the support shaft 1. Yes.

  In this embodiment, around the support shaft 1, three axial grooves 13 are formed at angular intervals, three inwardly protruding portions 14 are formed at angular intervals, and each inwardly protruding portion 14 is It is inserted in each axial groove 13. Therefore, the central hole 12 is fitted to the outer peripheral surface of the support shaft 1 at the angular position between the axial grooves 13, and the round blade 2 is supported at three points by the outer peripheral surface of the support shaft 1.

  The axial groove 13 has a bottom surface with an arcuate cross section. The inward protruding portion 14 has a shape corresponding to the axial groove 13.

  Further, the support shaft 1 has a flange 15 that contacts the round blade 2. Further, a screw groove 16 is formed on the outer peripheral surface of the support shaft 1, a nut 17 is screwed into the screw groove 16 and pressed against the round blade 2, and the round blade 2 is sandwiched between the nut 17 and the flange 15, The round blade 2 is fixed by the nut 17 and the flange 15.

  Further, as described above, the center hole 12 is formed in the round blade 2 and the center hole 12 is fitted to the outer peripheral surface of the support shaft 1. However, in this embodiment, the support shaft 1 is adjacent to the flange 15. It has a first part 18. Further, the support shaft 1 has a second portion 19 continuous with the first portion 18, and the second portion 19 has an outer diameter smaller than that of the first portion 18. An axial groove 13 is formed on the outer peripheral surfaces of the first and second portions 18 and 19. Further, the center hole 12 is fitted to the outer peripheral surface of the first portion 18, a screw groove 16 is formed on the outer peripheral surface of the second portion 19, and a nut 17 is screwed to the screw groove 16. The nut 17 has a hollow cylindrical tip portion 20. The cylindrical tip portion 20 has a larger inner diameter than the first portion 18. And the cylindrical front-end | tip part 20 is pressed on the round blade 2, and the round blade 2 is fixed by this.

  Therefore, in the case of this device, the inwardly protruding portion 14 of the round blade 2 is inserted into the axial groove 13 of the support shaft 1, and when the round blade 2 and the support shaft 1 rotate due to the friction of the web material 9, The projecting protruding portion 14 engages with the axial groove 13 of the support shaft 1, and the round blade 2 rotates integrally with the support shaft 1. Therefore, the round blade 2 does not idle along the outer peripheral surface of the support shaft 1, and the support shaft 1 is not scraped and damaged by the round blade 2.

  Further, when the round blade 2 and the support shaft 1 are rotated and the web material 9 is slit, it is necessary to prevent the round blade 2 from being vertically shaken. In the case of this apparatus, the outer peripheral surface of the support shaft 1 is required. As described above, the center hole 12 is fitted to the center, and the round blade 2 is thereby centered. In this case, the roundness of the outer peripheral surface with respect to the center line of the support shaft 1 is related thereto, but it is easy to give the outer peripheral surface of the support shaft 1 roundness. Furthermore, although the roundness of the center hole 12 with respect to the center line of the round blade 2 is important, it is easy to give the roundness to the center hole 12 of the round blade 2. Therefore, the round blade 2 and the support shaft 1 can be accurately centered, and vertical deflection does not occur in the round blade 2.

  Furthermore, in the case of this apparatus, three axial grooves 13 are formed at an angular interval, and the central hole 12 is fitted to the outer peripheral surface of the support shaft 1 at the angular positions between the respective axial grooves 13 so that the support is supported. As described above, the round blade 2 is supported at three points by the outer peripheral surface of the shaft 1. Therefore, the round blade 2 can be accurately held and centered.

  As described above, the inward projecting portion 14 has a shape corresponding to the axial groove 13. However, in this embodiment, the inward projecting portion 14 is slightly smaller than the axial groove 13. Therefore, when the round blade 2 rotates in the direction of the arrow X in FIG. 3, a gap C is formed between the inwardly protruding portion 14 and the axial groove 13. In this case, when the center hole 12 is fitted to the outer peripheral surface of the support shaft 1, the inwardly projecting portion 14 does not interfere with it. Therefore, the round blade 2 can be supported at three points by the outer peripheral surface of the support shaft 1 and can be centered.

  Furthermore, the axial groove 13 has a bottom surface with an arcuate cross section. Therefore, the axial groove 13 can be formed by a rotary cutter as in the apparatus disclosed in Japanese Patent Laid-Open No. 2003-181790, and the processing is easy.

  In addition, about the axial groove | channel 13 of the spindle 1, it is not necessary to center the round blade 2 by it. Therefore, it is not necessary to have the circularity in the axial groove 13. The same applies to the inwardly protruding portion 14 of the round blade 2. The inwardly projecting portion 14 and the axial groove 13 may be precisely configured so that the inwardly projecting portion 14 engages with the axial groove 13 of the support shaft 1 and the round blade 2 rotates integrally with the support shaft 1. There is no need to fit. The inwardly projecting portions 14 may be inserted into the respective axial grooves 13 so that a gap C is formed between the inwardly projecting portions 14 and the axial grooves 13, and the processing accuracy is not required.

  Further, it is necessary to prevent the round blade 2 from being laterally shaken. In this apparatus, the nut 17 is pressed against the round blade 2, and the round blade 2 is sandwiched between the nut 17 and the flange 15. Is as described above. Therefore, the round blade 2 is fixed by the nut 17 and the flange 15, and no side shake occurs in the round blade 2.

  Further, as for the center hole 12 of the round blade 2, the support shaft 1 has a first portion 18 adjacent to the flange 15, and the center hole 12 is fitted to the outer peripheral surface of the first portion 18 as described above. is there. As described above, the spindle 1 has a second portion 19 that is continuous with the first portion 18, and the second portion 19 has an outer diameter smaller than that of the first portion 18. Therefore, when the center hole 12 is fitted, the round blade 2 can be moved toward the first part 18 around the second portion 19, and the center hole 12 can be easily fitted. As described above, the thread groove 16 is formed on the outer peripheral surface of the second portion 19, the nut 15 has a hollow cylindrical portion 20, and the cylindrical portion 20 has an inner diameter larger than that of the first portion 18. It is. Therefore, the center hole 12 can be fitted to the outer peripheral surface of the first portion 18, and then the nut 17 can be screwed into the screw groove 16 of the second portion 19, and the cylindrical portion 20 can be pressed against the round blade 2. The round blade 2 can be fixed, and there is no problem.

  Therefore, in the case of this device, the vertical blade 2 does not cause a vertical shake and a horizontal shake does not occur. Accordingly, the web material 9 can be accurately slit.

It is a side view which shows the Example of this invention. It is a longitudinal cross-sectional view of the apparatus of FIG. FIG. 3 is a cross-sectional view of the support shaft and the round blade of FIG. 2. FIG. 4 is a cross-sectional view of the support shaft in FIG. 3. It is a front view of the round blade of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support shaft 2 Round blade 12 Center hole 13 Axial groove 14 Inward protruding part 15 Flange 16 Screw groove 17 Nut 18 First part 19 Second part 20 Cylindrical tip part

Claims (3)

A center hole is formed in the round blade, and the center hole is fitted directly on the outer peripheral surface of the support shaft, whereby the round blade is centered, and further, an axial groove is formed on the outer peripheral surface of the support shaft, An inward projecting portion is formed at the periphery of the center hole, the inward projecting portion is inserted into the axial groove of the support shaft, and the round blade rotates integrally with the support shaft; The support shaft has a flange that contacts the round blade, a screw groove is formed on the outer peripheral surface of the support shaft, a nut is screwed into the screw groove, and is pressed against the round blade. The round blade is fixed between the nut and the flange, the round blade is fixed by the nut and the flange , the support shaft has a first portion adjacent to the flange, and the support shaft is Consecutive 1 part The second portion has an outer diameter smaller than that of the first portion, the central hole is fitted to the outer peripheral surface of the first portion, and the screw groove is formed on the outer peripheral surface of the second portion. Formed and screwed into the screw groove, the nut has a hollow cylindrical tip portion, the cylindrical tip portion has a larger inner diameter than the first portion, and is pressed against the round blade, A round blade mounting device for a slitter, wherein the round blade is fixed thereby.   Around the support shaft, the three axial grooves are formed at angular intervals, the three inwardly projecting portions are formed at angular intervals, and the inward flanges are formed at the axial grooves. The center hole is fitted to the outer peripheral surface of the support shaft at an angular position between the axial grooves, and the round blade is supported at three points by the outer peripheral surface of the support shaft. The apparatus according to claim 1.   3. The apparatus according to claim 2, wherein the axial groove has a bottom surface having an arcuate cross section, and the inwardly protruding portion has a shape corresponding to the axial groove.

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