JP4051112B2 - Rotary cutter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary cutter device that cuts an object to be cut such as paper between a knife provided in a knife rotor and a plain rotor facing the knife rotor.
[0002]
[Prior art]
In general, this type of rotary cutter device includes, for example, a knife rotor to which a knife is attached and a plain rotor facing the knife rotor, as disclosed in Japanese Patent Application Laid-Open No. 5-228721. The rotor is rotated via a drive mechanism, and a cut object such as paper is cut between the knife and the plain rotor.
[0003]
By the way, in the conventional rotary cutter device, in order to assemble the knife into the knife rotor, as disclosed in the above-mentioned publication, the outer surface of the knife rotor is provided with a groove extending in the axial direction of the rotor. The knife and the taper block are fitted into the groove, and one end of the knife is brought into contact with the inner bottom surface of the groove, and the taper block is bolted to the knife rotor. The knife is fixed to the knife rotor by sandwiching the knife with the inner surface of the groove.
[0004]
[Problems to be solved by the invention]
However, in the above rotary cutter device, since it is necessary to make a groove in the knife rotor that extends almost the entire length in the axial direction of the knife rotor, the strength of the knife rotor is naturally reduced accordingly. In order to increase the accuracy of the height of the knife, the inner bottom surface of the concave groove that receives one end of the knife must be made accurate, and there is a problem that labor is required for processing.
[0005]
Also, even when the knife is installed in a spiral shape with respect to the outer peripheral surface of the knife rotor, it is difficult to adjust the spiral angle, and when a plurality of knives are provided on the outer peripheral surface of the knife rotor at regular intervals, When the concave groove is formed in the knife rotor, the attachment position of the knife relative to the knife rotor is determined, and there is a problem that the attachment position of the knife relative to the knife rotor cannot be finely adjusted.
[0006]
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 finely adjust a knife attachment position with respect to the knife rotor while increasing the strength of the knife rotor. In the point.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is directed to a knife rotor, a knife attached to the outer peripheral surface of the knife rotor in a spiral shape through a pair of knife holders, and opposed to the knife rotor. In the rotary cutter device, in which a workpiece is cut between the knife and the plane rotor, the knife holder is provided with a fixed wall portion that is fixed to the outer peripheral surface of the knife rotor. The fixed wall portion is provided with a bolt insertion hole for inserting a bolt, and the bolt inserted into the bolt insertion hole is screwed into a bolt hole provided in the outer peripheral surface of the knife rotor, so that the knife A holder is fixed on the outer peripheral surface of the knife rotor so as to face each other, and the knife is interposed between the knife holders so that one end of the knife is connected to the nails. While making it contact | abut to the outer peripheral surface of a floater, the said knife holder is provided with the magnet for adhering to the said knife, On the other hand, the internal diameter of the bolt insertion hole provided in the said fixed wall part is made from the outer diameter of the axis | shaft of the said bolt. A first adjusting means for enabling the position of the knife holder to be changed with respect to the knife rotor via the bolt, and adjusting the fixing position of the knife holder with respect to the knife rotor, and the knife with respect to the knife holder. The second adjustment means that can adjust the attachment position is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic explanatory view of a paper cutting machine using a rotary cutter device of the present invention. As shown in FIG. 1, the paper cutting machine is connected to a pinch roll device 1 for pulling out continuous paper at a constant speed, and a continuous cutting machine. A continuous paper P fed from a paper machine (not shown), comprising a slitter device 2 for trimming the width of the paper P, a feed roll device 3 for aligning the continuous paper P, and a rotary cutter device 4 according to the present invention. Is pulled out by the pinch roll device 1 and sent to the slitter device 2, and the continuous paper P cut in the transport direction by the slitter device 2 is aligned by the feed roll device 3 and sent to the rotary cutter device 4. The cutter device 4 is cut into a predetermined length.
[0011]
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 between the knife 5 and the plain rotor 7.
[0012]
Thus, in the rotary cutter device 4 configured as described above, a pair of first and second knife holders 8 a and 8 b are separately formed, and the pair of first and second knife holders 8 a and 8 b are formed on the outer periphery of the knife rotor 6. In this embodiment, the knife 5 is interposed between the knife holders 8a and 8b so as to be opposed to each other on the surface. In the embodiment shown in the figure, on the outer peripheral surface of the knife rotor 6 and the knife rotor. The first and second knife holders 8a and 8b are fixed to each other at symmetrical positions around the axis 6 and the knife 5 is interposed between the knife holders 8a and 8b. Two knives 5 are provided on the rotor 6.
[0013]
The first and second knife holders 8a and 8b shown in the drawing extend over the entire length in the longitudinal direction of the knife rotor 6, and basically, a fixed wall portion 81 fixed on the outer peripheral surface of the knife rotor 6, and the fixed wall. A vertical wall portion 82 erected from one end in the width direction of the portion 81 is configured to have a substantially L-shaped cross section, and a pair of leg portions placed on the outer peripheral surface of the knife rotor 6 on the lower surface of the fixed wall portion 81. 81a is protruded.
[0014]
The fixed wall portion 81 is provided with a plurality of bolt insertion holes 83, and the vertical wall portion 82 of the first knife holder 8a is formed with a screw hole 85 into which a pair of screw bodies 84 can be screwed. The screw body 84 screwed into the screw hole 85 is used as second adjusting means that enables fine adjustment of the attachment position of the knife 5 with respect to the knife holders 8a and 8b, and on the side surface of the vertical wall portion 82 in the second knife holder 8b. A concave groove 86 extending over the entire length of the knife holder 8b is formed, and a magnet 87 is incorporated in the concave groove 86 so that the knife 5 interposed between the knife holders 8a and 8b is attracted to the magnet 87, The knife 5 is fixed to the knife holder 8b.
[0015]
On the other hand, the knife rotor 6 includes a plurality of first bolt holes 61 for bolting the first knife holder 8a and a plurality of second bolt holes 62 for bolting the second knife holder 8b, respectively. In the embodiment shown in the figure, as shown in FIG. 5, the first and second knife holders 8 a and 8 b and the knife 5 are formed along the longitudinal direction of the knife rotor 6. The first bolt hole 61 and the second bolt hole 62 are connected to the axis L of the knife rotor 6 so that the first bolt hole 61 and the second bolt hole 62 are respectively connected to the center of the bolt rotor 61. It is formed to have a bow that slightly swings in the circumferential direction.
[0016]
In the embodiment shown in the figure, the inner diameter of the bolt insertion hole 83 formed in the fixed wall portion 81 is slightly larger than the outer diameter of the shaft of the bolt 88, and the first and second knife holders 8 a and 8 b are connected to the bolt 88. In other words, the position of the first and second knife holders 8a and 8b with respect to the knife rotor 6 can be adjusted by adjusting the bolt insertion hole 83 and the bolt 88 so that the position can be slightly changed with respect to the knife rotor 6. 1 adjustment means.
[0017]
Further, the outer peripheral surface of the plane rotor 7 is formed smoothly with a hard metal so that it does not easily wear when the tip of the knife 5 is pressed and does not leave uncut paper.
Reference numeral 89 in the figure denotes a stopper plate for preventing the knife 5 from slipping out in the longitudinal direction of the knife holders 8a and 8b. The stopper plate 89 is fixed between the edges of the knife holders 8a and 8b with bolts 89a. ing.
[0018]
In order to attach the knife 5 to the knife rotor 6 of the rotary cutter device having the above structure, first, the bolt 88 inserted into the bolt insertion hole 83 of the fixed wall portion 81 in the second knife holder 8 b is screwed into the second bolt hole 62. The second knife holder 8b is spirally fixed to the outer peripheral surface of the knife rotor 6 and then the knife 5 is attracted to the magnet 87 assembled on the side surface of the vertical wall portion 82 of the second knife holder 8b. Then, one end of the knife 5 is brought into contact with the outer peripheral surface of the knife rotor 6.
[0019]
Then, the bolt 88 inserted through the bolt insertion hole 83 of the fixed wall portion 81 of the first knife holder 8a is screwed into the first bolt hole 61, and the first knife holder 8a is spirally formed on the outer peripheral surface of the knife rotor 6. The knife 5 is interposed between the vertical wall portions 82 of both knife holders 8a and 8b.
The gap between the vertical wall portions 82 of the knife holders 8a and 8b is set slightly wider than the thickness of the knife 5.
[0020]
Subsequently, the screw body 84 is appropriately screwed, and the position of the knife 5 with respect to the knife holders 8a and 8b is finely adjusted by pressing the side surface of the knife 5 toward the second knife holder 8b with the tip of the screw body 84. In this case, the knife 5 is assembled in a spiral shape at a desired position on the outer peripheral surface of the knife rotor 6.
Thus, in the above embodiment, the inner diameter of the bolt insertion hole 83 is slightly larger than the outer diameter of the shaft of the bolt 88, and the first and second knife holders 8a and 8b are slightly moved with respect to the bolt 88. Since the position can be changed, the fixing positions of the first and second knife holders 8a and 8b with respect to the knife rotor 6 can be finely adjusted, and the spiral angle of the knife and the relative positional relationship between the two knives 5 can be adjusted. Fine adjustment can be easily performed.
[0021]
【The invention's effect】
According to the first aspect of the present invention, the strength of the knife rotor 6 can be increased as compared with the conventional one having a recessed groove, and one end of the knife 5 interposed between the knife holders 8a and 8b. Is received by the outer peripheral surface of the knife rotor 6 that can easily improve the processing accuracy, so that the accuracy of the knife height can be improved, the cutting performance of the workpiece can be improved, and the magnet 87 The knife 5 can be mounted on the knife rotor 6 easily and reliably, and the knife 5 of the knife 5 disposed, for example, in a spiral shape is provided by the first adjusting means that can adjust the fixing positions of the knife holders 8a and 8b with respect to the knife rotor 6. Fine adjustment of the position of attachment to the rotor 6 and the spiral angle of the knife 5 can be easily performed, and the knife 5 with respect to the knife holders 8a and 8b. The position of the knife 5 with respect to the knife holders 8a and 8b can be finely adjusted by the second adjusting means that makes it possible to adjust the mounting position, and the knife 5 arranged in a spiral shape is placed at a predetermined position on the outer peripheral surface of the knife rotor 6. Can be assembled accurately.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of a paper cutter equipped with a rotary cutter device.
FIG. 2 is a plan view of a main part of a knife rotor in a rotary cutter device.
FIG. 3 is a front view of a main part of a knife rotor in a rotary cutter device.
4 is an enlarged sectional view taken along line XX in FIG.
FIG. 5 is a plan view in which a part of the knife rotor is omitted.
[Explanation of symbols]
5 Knife 6 Knife rotor 7 Plain rotor 8a First knife holder 8b Second knife holder 83 Bolt insertion hole (first adjusting means)
88 bolts (first adjusting means)
84 Screw body (second adjusting means)

Claims (1)

A knife rotor (6), a knife (5) attached spirally to the outer peripheral surface of the knife rotor (6) via a pair of knife holders (8a) (8b), and the knife rotor (6) In the rotary cutter device comprising the opposed plain rotor (7) and cutting the workpiece (P) between the knife (5) and the plane rotor (7), the knife holder (8a) ( 8b) is provided with a fixed wall portion (81) that is fixed to the outer peripheral surface of the knife rotor. The fixed wall portion (81) has a bolt insertion hole (83) for inserting a bolt (88). A bolt inserted through the bolt insertion hole is screwed into a bolt hole (61) (62) provided on the outer peripheral surface of the knife rotor 6, and the knife holder (8a) (8b) is attached to the knife rotor ( ) On the outer peripheral surface of the knife rotor (8), and the knife (5) is interposed between the knife holders (8a) and (8b). While being in contact with the surface, the knife holder (8a) (8b) is provided with a magnet (87) for fixing the knife (5), while a bolt insertion hole (83) provided in the fixed wall portion And the knife holder (8a) (8b) can be repositioned with respect to the knife rotor via the bolt (88). First adjusting means for adjusting the fixing position of the knife holder (8a) (8b) with respect to the rotor (6) and the mounting position of the knife (5) with respect to the knife holder (8a) (8b) are adjustable. Second adjuster Rotary cutter device, characterized in that provided.

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