JP4452749B2 - Rotary cutter device - Google Patents

Description

  The present invention relates to a rotary cutter device that cuts an object to be cut such as paper using a knife assembled to a knife rotor and a plain rotor facing the knife rotor.

  Generally, this type of rotary cutter device includes a knife rotor, a knife attached to the outer peripheral surface of the knife rotor in a spiral shape through a pair of first and second knife holders, and a plain rotor facing the knife rotor. The object to be cut is cut by the knife and the plain rotor.

By the way, in the above rotary cutter apparatus, in order to adjust the attachment position of the knife with respect to a knife rotor, the knife holder is provided with the fixed wall part fixed to the outer peripheral surface of a knife rotor, A bolt is provided in this fixed wall part. A bolt insertion hole is provided to pass through the bolt, and a bolt inserted through the bolt insertion hole is screwed into a bolt hole provided on the outer peripheral surface of the knife rotor so that the knife holder faces the outer peripheral surface of the knife rotor. The knife is interposed between the knife holders, one end of the knife is brought into contact with the outer peripheral surface of the knife rotor, and the inner diameter of the bolt insertion hole provided in the fixed wall portion is set to the axis of the bolt shaft. The knife holder can be repositioned with respect to the knife rotor via bolts so that the knife holder can be repositioned with respect to the knife rotor. Provided with a first adjustment mechanism that enables adjusting the location, but also provided a second adjustment mechanism that enables adjusting the mounting position of the knife relative to the knife holder.
(See Patent Document 1)
In the above rotary cutter device, in order to attach the knife to the knife rotor, first, the bolt inserted into the bolt insertion hole of the fixed wall portion in the first knife holder is screwed into the bolt hole, and the knife rotor of the first knife holder The first knife holder is spirally fixed to the outer peripheral surface of the knife rotor, and one end of the knife is brought into contact with the outer peripheral surface of the knife rotor.

  Then, the bolt inserted into the bolt insertion hole of the fixed wall portion of the other second knife holder is screwed into the bolt hole, and the installation position of the second knife holder with respect to the knife rotor is arbitrarily adjusted. The holder is fixed to the outer peripheral surface of the knife rotor in a spiral shape, and a knife is interposed between the vertical wall portions of both knife holders.

  Subsequently, the screw body constituting the second adjustment mechanism is appropriately screwed, and the side of the knife is pressed toward the second knife holder with the tip of the screw body to finely adjust the position of the knife with respect to the knife holder. Thus, the knife is assembled in a spiral shape at a desired position on the outer peripheral surface of the knife rotor.

By the way, in the above rotary cutter apparatus, when assembling the knife, in addition to the adjustment operation of the attachment position of the first knife holder and the second knife holder with respect to the knife rotor by the first adjustment mechanism, the adjustment operation by the second adjustment mechanism must be performed. However, the adjustment work as a whole takes time and is difficult to adjust.
JP-A-11-123694

  The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a rotary cutter device that can easily and easily adjust the attachment position of the knife with respect to the knife rotor.

  In order to achieve the above object, the invention described in claim 1 includes a knife rotor, a knife attached to the outer peripheral surface of the knife rotor in a spiral shape through a pair of first and second knife holders, In the rotary cutter device that includes a plain rotor facing the knife rotor and cuts a sheet-like workpiece between the knife and the plain rotor, the first knife holder includes a bolt insertion hole and a knife rotor. Positioning protrusions that can be fitted into fitting grooves formed on the outer peripheral surface are provided, the positioning protrusions are fitted into the fitting grooves, and bolts that are inserted through the bolt insertion holes are provided on the outer peripheral surface of the knife rotor. Then, the first knife holder is fixed on the outer peripheral surface of the knife rotor, and the second knife holder has a position adjustment. An eccentric portion insertion hole provided in the bush is provided, and a position adjusting bush is mounted on the insertion hole via the eccentric portion, and a bolt inserted into the through hole of the position adjusting bush is attached to the knife. The eccentric portion is screwed into a second bolt hole provided on the outer peripheral surface of the rotor, the second knife holder is assembled on the outer peripheral surface of the knife rotor, and the position adjusting bush is angularly rotated. The second knife holder can be moved in the proximity or separation direction with respect to the first knife holder via the.

  According to a second aspect of the present invention, in the rotary cutter device according to the first aspect, the opening portion of the second bolt hole in the knife rotor has a fitting hole in which a tip end portion of the position adjusting bush is rotatably fitted. It is provided.

  The invention according to claim 3 is the rotary cutter device according to claim 1 or 2, wherein at least one of the first knife holder and the second knife holder is in elastic contact with the outer peripheral surface of the plain rotor, A pressing member for pressing a workpiece to be cut with the surface is provided.

  According to a fourth aspect of the present invention, in the rotary cutter device according to the first, second, or third aspect, the first knife holder is provided with a magnet for fixing the knife to the first knife holder. It is characterized by that.

  According to the first aspect of the present invention, it is possible to easily and easily adjust the attachment position of the knife with respect to the knife rotor by the angular rotation operation of the position adjusting bush.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the position adjusting bush rotates smoothly without rattling.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1, 2, or 3, when the workpiece is cut, the workpiece is elastically held by the plain rotor and the pressing member. Therefore, the object to be cut by the knife is surely cut.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 1, 2, or 3, the knife is fixed to the first knife holder by the magnet, so that the knife can be further attached to the knife rotor. Easy and reliable.

Hereinafter, an embodiment of a rotary cutter device according to the present invention will be described.
FIG. 1 is a schematic explanatory view of a paper cutter using the rotary cutter device of the present invention, FIG. 2 is a plan view of the main part of the knife rotor in the rotary cutter device, and FIG. 3 is the main part of the knife rotor in the rotary cutter device. FIG. 4 is a schematic plan view showing the knife rotor with a part thereof omitted, and FIG. 5 is a perspective view of the position adjusting bush.

  The paper cutter schematically shown in FIG. 1 basically includes a pinch roll device 1 that draws continuous paper at a constant speed, a slitter device 2 that cuts the width of the continuous paper P, and a feed that draws the continuous paper P. Consisting of the roll device 3 and the rotary cutter device 4 of the present invention, the continuous paper P fed out from a paper machine (not shown) is pulled out by the pinch roll device 1 and fed into the slitter device 2, and this slitter device. The continuous paper P cut in the conveyance direction by 2 is aligned by the feed roll device 3 and fed to the rotary cutter device 4, and is cut to a predetermined length by the rotary cutter device 4.

  The rotary cutter device 4 according to the present invention includes a knife rotor 6 to which a knife 5 is attached, and a plain rotor 7 facing the knife rotor 6, and the knife rotor 6 and the plain rotor 7 are driven by a drive device (not shown). The continuous paper P fed from the feed roll device 3 is cut by the knife 5 and the plain rotor 7.

  In the above rotary cutter device 4, in order to attach the knife 5 to the knife rotor 6, a pair of first and second knife holders 8a and 8b are separately formed, and the pair of first and second knife holders 8a and 8b 8b is fixed on the outer peripheral surface of the knife rotor 6 so as to face each other, and the knife 5 is interposed between the knife holders 8a and 8b.

  The first knife holder 8a and the second knife holder 8b extend over the entire length in the longitudinal direction of the knife rotor 6, and are basically fixed wall portions 81a and 81b fixed on the outer peripheral surface of the knife rotor 6, and the fixing. The vertical wall portions 82a and 82b erected from one end in the width direction of the wall portions 81a and 81b are substantially L-shaped in cross section.

  A positioning projection 83 is formed on the lower surface of the fixed wall portion 81a of the first knife holder 8a over the entire length in the length direction of the fixed wall portion 81a. A plurality of positioning protrusions 83a are formed on the fixed wall portion 81a of the first knife holder 8a. Bolt insertion hole 84 is opened.

  Further, a concave groove 85 extending over the entire length of the vertical wall portion 82 is formed on the side surface of the vertical wall portion 82a in the first knife holder 8a, and a magnet 86 is incorporated in the concave groove 85, so that the first and second knives are incorporated. The knife 5 interposed between the holders 8a and 8b is attracted to the magnet 86, and the knife 5 is fixed to the first knife holder 8a.

  Further, the fixed wall portion 81b of the second knife holder 8b is provided with an insertion hole 87 through which an eccentric portion 95 of the position adjusting bush 9 described later can be inserted.

  Further, when the knife holders 8a and 8b are fixed to the knife rotor 6, the fixed wall portions 81a and 81b of both knife holders 8a and 8b are arranged so that the lower surfaces of the fixed wall portions 81a and 81b are along the outer peripheral surface of the knife rotor 6. Slits 88a and 88b are formed between the adjacent bolt insertion holes 84 and 87 so that adjacent portions bend each other across the slits 88a and 88b in the fixed wall portions 81a and 81b.

  A pressing member 89 is provided on the upper surface of the vertical wall portion 82a of the first knife holder 8a to press the paper that is elastically contacted with the outer peripheral surface of the plane rotor 7 and cut with the outer peripheral surface of the plane rotor 7. The pressing member 89 is made of an elastically deformable material, in the embodiment, a sponge material.

  The knife rotor 6 has a fitting groove 61 into which a positioning projection 83 projecting from the lower surface of the fixed wall portion 81a of the first knife holder 8a can be fitted, and a plurality of first grooves for bolting the first knife holder 8a. One bolt hole 62 and a plurality of second bolt holes 63 for bolting the second knife holder 8 b are formed along the longitudinal direction of the knife rotor 6.

  That is, in the embodiment shown in the figure, as schematically shown in FIG. 4, the first and second knife holders 8a and 8b and the knife 5 are installed on the outer peripheral surface of the knife rotor 6 in a spiral shape in plan view. The fitting groove 61 is formed to be a bow slightly swung in the circumferential direction in the plan view with respect to the axis L of the knife rotor 6.

  Similarly, the first bolt hole 62 and the second bolt hole 63 are respectively bolts so that the first and second knife holders 8a and 8b and the knife 5 are spirally installed on the outer peripheral surface of the knife rotor 6. The trajectory connecting the centers of the holes 61 and 62 is provided so as to form a bow slightly swung in the circumferential direction in the plan view with respect to the axis L of the knife rotor 6.

  A circular fitting hole 64 having an inner diameter that is slightly larger than the inner diameter of the bolt hole 63 is provided at the inlet of the second bolt hole 63.

  On the other hand, the position adjusting bush 9 has a through hole 91 through which the screw shaft 11 of the bolt 10 can be inserted, and a head on which the head 12 of the bolt 10 is fitted at one end of the through hole 91. A part fitting hole 92 is provided.

  Further, a rotation operation portion 93 whose outer shape is formed in a square shape when viewed from above is provided on the outer periphery of the head fitting hole 92 in the position adjusting bush 9.

  Further, on the outer periphery of the position adjusting bush 9 and below the rotation operation portion 93, a circular flange portion 94 protruding radially outward is sandwiched, and the radial direction is offset by about 1 mm with respect to the central axis of the through hole 91. A cylindrical eccentric portion 95 that is centered and a cylindrical fitting portion 96 that is coaxial with the central axis of the through hole are provided.

  The head 12 of the bolt 10 is formed in a cylindrical shape, and a hexagon hole 13 into which a hexagon wrench can be fitted is provided on the upper surface side.

In the embodiment shown in the figure, the inner diameter of the bolt insertion hole 84 formed in the fixed wall portion 81a of the first knife holder 8a is formed slightly larger than the outer diameter of the screw shaft portion 11 of the bolt 10,
When the first knife holder 8a is bolted, the fixing position of the first knife holder 8a with respect to the knife rotor can be slightly adjusted.

  In order to attach the knife 5 to the knife rotor 6 of the rotary cutter device 4 having the above structure, the first knife holder 8a is set on the outer peripheral surface of the knife rotor 6, and the positioning protrusion 80 provided on the first knife holder is The fitting groove 61 provided in the knife rotor 6 is fitted, and the outer surface of the positioning protrusion 80 is brought into contact with the inner surface of the fitting groove 61.

  Subsequently, the bolt 10 is inserted into the bolt insertion hole 84 of the first knife holder 8a, and the screw shaft portion 11 of the bolt 10 is screwed into the first bolt hole 62 provided in the knife rotor 6, whereby the first knife The holder 8a is fixed to the outer peripheral surface of the knife rotor 6 in a spiral shape.

  Next, the second knife holder 8b is set on the outer peripheral surface of the knife rotor 6, and the eccentric portion 95 of the position adjusting bush 9 is inserted into the insertion hole 87 of the second knife holder 8b. The fitting portion 96 is fitted into the fitting hole 64 provided in the knife rotor 6.

  Then, the screw shaft portion 11 of the bolt 10 is inserted into the through hole 91 of the position adjusting bush 9, and the insertion end portion is screwed into the second bolt hole 63 provided in the knife rotor 6, thereby the second knife holder 8b. Is fixed to the outer peripheral surface of the knife rotor 6 in a spiral shape.

  Subsequently, the knife 5 is interposed between the vertical wall portions 82a and 82b of both knife holders 8a and 8b, and the knife 5 is attracted to the magnet 86 assembled on the side surface of the vertical wall portion 82a of the first knife holder 8a. At the same time, the lower end of the knife 5 is brought into contact with the outer peripheral surface of the knife rotor 6.

  Then, in order to further finely adjust the mounting position of the knife 5 set as described above to the mounting position of the second knife holder 8b, the position adjusting bush 9 may be angularly rotated with respect to the bolt 10. Then, with the angular rotation of the position adjusting bush, the second knife holder 8b is slightly moved in the direction approaching or separating from the first knife holder 8a via the eccentric portion 95, and the second knife holder 8b. The installation position of the knife 5 with respect to the knife rotor 6 is finely adjusted.

  Thus, in the above embodiment, the position where the second knife holders 8a and 8b are fixed to the knife rotor 6 and the installation position of the knife 5 relative to the knife rotor 6 are finely adjusted by the angular rotation operation of the position adjusting bush 9. Therefore, fine adjustment of the spiral angle of the knife 5 can be performed easily and easily.

  Further, when the paper is cut, for example, by the rotary cutter device 4 described above, the paper is elastically held by the plane rotor 7 and the pressing member 89, so that the cutting of the paper by the knife 5 is reliably performed.

Schematic explanatory drawing of the paper cutter provided with the rotary cutter apparatus. The top view of the principal part of the knife rotor in a rotary cutter apparatus. The expanded sectional view of the principal part of the knife rotor in a rotary cutter apparatus. The schematic plan view which abbreviate | omits and shows a part of knife rotor. The perspective view of the position adjustment bush.

Explanation of symbols

10 bolt 4 rotary cutter device 5 knife 6 knife rotor 61 fitting groove 62 first bolt hole 63 second bolt hole 7 plain rotor 8a first knife holder 8b second knife holder 83 positioning protrusion 9 position adjusting bush 95 eccentric part 96 Fitting part

Claims (4)

  A knife rotor, a knife attached to the outer peripheral surface of the knife rotor in a spiral shape via a pair of first and second knife holders, a plain rotor facing the knife rotor, the knife and the plane rotor, In the rotary cutter device for cutting a sheet-like workpiece between the first knife holder, the first knife holder is provided with a positioning protrusion that can be fitted into a fitting groove formed on the outer peripheral surface of the bolt insertion hole and the knife rotor. The positioning protrusion is fitted into the fitting groove, and a bolt inserted through the bolt insertion hole is screwed into a first bolt hole provided on the outer peripheral surface of the knife rotor, so that the first knife holder is It is fixed on the outer peripheral surface of the knife rotor, and the second knife holder is provided with an insertion hole for an eccentric portion provided in the position adjusting bush. The position adjusting bush is mounted on the eccentric portion, and the bolt inserted through the through hole of the position adjusting bush is screwed into the second bolt hole provided on the outer peripheral surface of the knife rotor, The second knife holder is assembled on the outer peripheral surface of the knife rotor, and the second knife holder is brought close to the first knife holder via the eccentric portion by the angular rotation operation of the position adjusting bush. A rotary cutter device characterized by being movable in a separating direction.   2. The rotary cutter device according to claim 1, wherein the opening portion of the second bolt hole in the knife rotor is provided with a fitting hole in which a tip end portion of the position adjusting bush is rotatably fitted.   At least one of the first knife holder and the second knife holder is provided with a pressing member for pressing an object to be cut that is elastically contacted with the outer peripheral surface of the plain rotor and cut with the outer peripheral surface of the plain rotor. The rotary cutter device according to claim 1 or 2.   The rotary cutter device according to claim 1, 2, or 3, wherein the first knife holder is provided with a magnet for fixing the knife to the first knife holder.

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