JP2010240820A - Paper sheet conveying and cutting apparatus with discharging mechanism and blushing-off mechanism for cut piece of paper margin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means capable of smoothing the discharge of cut pieces of paper margins in a discharge path to prevent the accumulation of the cut pieces of the paper margins and further preventing the cut pieces of the paper margins with narrow width from remaining on a blade face since the cut pieces of the paper margins generated when cutting a paper sheet in lengthwise and widthwise directions sometimes accumulates in the discharge path thereof, and also remains on the blade face, which leads to trouble cutting following paper sheets. <P>SOLUTION: The cut pieces of the paper margins are frictionally conveyed and scraped off by the cut pieces discharge mechanism 10 provided to project in the discharge path of the cut pieces of the paper margins. The cut pieces of the paper margins remaining on a cutting blade are brushed-off by the brushing off mechanism 19 of the cut pieces of the paper margins on a rear end. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

    In the present invention, the sheet is cut and fed in two directions, a direction crossing the sheet feeding direction (hereinafter referred to as a sheet feeding lateral direction) or a sheet feeding direction (hereinafter referred to as a sheet feeding longitudinal direction). Margin cutting to eliminate jamming and clogging of blank cut pieces that occur when cutting in the lateral direction of paper feed, with regard to an apparatus that obtains cut paper with a size different from the size of the cut sheet, or a cut paper divided into a plurality of pieces. The present invention relates to a sheet discharge mechanism and a sheet cutting apparatus having a function of sweeping off blank cutting pieces remaining on a cutting machine fixed lower blade.

    FIG. 1 schematically shows the structure of a cutting apparatus. In the prior art, the sheet 1 is fed in the direction of the cutting machine 4 by the roller pair 2 on the upstream side of the cutting machine, and the cutting length is determined by the feed amount from the cutting machine 4, and the roller on the downstream side of the cutting machine at the time of cutting. The cutting paper supported by the pair 3 is discharged as a finished cutting paper by the roller pair 3 on the downstream side of the cutting machine after cutting, but is not supported by the roller pair 3 on the downstream side of the cutting machine at the time of cutting. The short blank cutting piece falls between the cutting machine 4 and the pair of rollers 3 on the downstream side of the cutting machine. Further, if the trailing edge of the sheet remains at the upstream side of the cutting machine 4 without being supported by the roller pair 2 on the upstream side of the cutting machine at the time of cutting, the portion is a blank cutting piece and the upstream of the cutting machine 4 and the cutting machine. It falls between the pair of side rollers 2. In either case, it is difficult to expect reliable discharge only by the natural fall of the blank cut piece, and sometimes the cut piece is clogged.

    The blank cut pieces are discharged out of the system by natural drop from the gap between the cutting machine and the upstream or downstream roller pair, but the distance between the upstream roller pair and the downstream roller pair is conveyed by the rollers. It is necessary to be shorter than the length of the paper to be obtained, and the width of the gap provided for the natural fall of the blank cut piece is limited, and apparatus components such as a roller and a cutting machine protrude into the discharge path of the blank cut piece, and the blank This is an obstacle to cutting piece discharge.

    If the blank cut piece is always flat, the discharge path side face is smoothed to prevent the blank cut piece from being caught on the projection, etc. By taking a measure such as providing a guide plate directed downward, it is possible to expect a reliable discharge of the blank cut pieces.

    However, the blank cutting pieces are not always flat, and the shape of the blank cutting pieces may be bent due to curling or coiled twisting due to cutting, resulting in a large drop projection plane. As a result, retention and clogging may occur in the middle of the discharge route of the blank cut piece.

    In addition, the blank cut piece has a higher rigidity than its weight, and once the discharge is delayed, it is difficult to drop and eliminate the discharge stagnation only by its own weight.

    In addition, when the length of the blank cutting piece is extremely short, the blank cutting piece may not naturally fall from the lower blade of the cutting machine and may remain on the cutting machine.

    The present invention has been made in view of the above points, and provides a method for smoothly and reliably discharging blank cut pieces.

    In the present invention, a cutting piece discharge mechanism by a rotating body that scrapes blank cutting pieces is disposed between a pair of rollers on the upstream side of the cutting machine and the cutting machine, or between a pair of rollers on the downstream side of the cutting machine and the cutting machine, or both. It is characterized by forcibly discharging margin cutting pieces.

    In particular, the rotating body is not a circular plate or a simple circular shape, but has a concave and convex shape such as a rice ball type, an oval type, or a gear type, and is scraped off in addition to the friction conveying function to the discharge port of the blank cutting piece. It has the function of.

    Still further, the present invention is characterized in that protrusions such as brushes are arranged on the entire circumference or a part of the outer circumference of the rotating body.

    In addition, if the length of the blank cutting piece is short and light, and it cannot be naturally dropped from the lower edge of the cutting machine after cutting, it has a function of sweeping off with a soft material such as a brush or a film to sweep them off. It is characterized by that.

    As described above, in the present invention, it is possible to promote the discharge of the blank cut piece by the frictional conveyance of the rotating body, and it is possible to eliminate the stay in the discharge path of the blank cut piece. Also, to reduce the frictional cutting capacity of blank cut pieces due to paper dust adhering to the outer periphery of the rotating body, to give a scraping function by making the rotating body have an uneven shape, or by arranging protrusions on the outer periphery I was able to solve it.

    In addition, if the length of the blank cutting piece is short and light and cannot be naturally dropped from the cutting machine lower blade after cutting, the problem can be solved by dropping the blank cutting piece to the discharge port with a function to sweep them off. I was able to.

    Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a state in which the leading edge of the sheet 1 is fed out from the shear cutting machine lower blade 6 by a sheet feeding length 7 shorter than the downstream roller pair / cutting machine distance 8. Since the leading edge of the sheet is not supported by the pair of rollers 3 on the downstream side of the cutting machine, when shear cutting is performed in this state, the leading end portion downstream of the cutting machine becomes a blank cutting piece and the lower blade 6 of the shear cutting machine It will naturally fall into the gap between the pair of rollers 3 on the downstream side of the cutting machine.

    FIG. 3 shows a state in which the front margin blank cut piece 9 has been shear cut by shear cutting. The shear cutting machine lower blade 6 is a fixed blade and the shear cutting machine upper blade 5 is a movable blade to cut the sheet 1, and the cutting surface of the front margin blank cut piece 9 is pushed down by the shear cutting machine upper blade 5 and discharged. Is prompted. However, when the distance 8 between the downstream roller pair / cutting machine is not sufficiently larger than the length of the front end blank cut piece 9, the cut piece discharge mechanism installed overhanging the discharge path of the front end blank cut piece 9 is installed. It is absolutely necessary to promote the discharge of the front edge blank cut piece 9 by 10.

    FIG. 4 shows a state in which the rear end of the sheet 1 is left behind the shear cutter lower blade 6 by a sheet rear end residual length 12 shorter than the upstream roller pair / cutter distance 13. In order for the leading edge of the sheet to reach the cutter downstream roller pair 3, the distance 11 between the upstream roller pair / downstream roller pair needs to be shorter than the sheet length, and as a result, the distance between the upstream roller pair / cutter 13. Is limited in length. Since the rear end of the sheet is not supported by the cutter upstream roller pair 2, when shear cutting is performed in this state, the rear end upstream of the cutter becomes a rear margin blank cutting piece. It will naturally fall into the gap between the lower blade 6 and the cutter upstream roller pair 2.

    FIG. 5 shows a state where the trailing edge blank cut piece 14 has been shear cut by shear cutting. The shear cutting machine is arranged so that the shear cutting machine lower blade 6 (fixed blade) is on the upstream side and the shear cutting machine upper blade 5 (movable blade) is on the downstream side for the convenience of paper passing, and the rear margin is cut. In the cutting piece 14, the shear cutting machine lower blade 6 (fixed blade) becomes an obstacle to the discharge path and starts to fall spontaneously from its rear end, but obstacles such as the pair of rollers on the upstream side of the cutting machine on the discharge path from the rear end. It becomes an obstacle to discharge. The cutting piece discharge mechanism 10 can accelerate the discharge of the trailing edge blank cutting pieces 14 by friction conveyance, mechanical scraping, or the like to solve these problems.

    FIG. 6 illustrates the shape of the rotating body used in the cutting piece discharge mechanism 10. The shape of the rotating body is a circular rotating body 15 on which frictional force on the outer periphery acts, an oval rotating body 16 that can be expected to have a scraping effect due to unevenness on the outer periphery, a rice ball type rotating body 17, or a protrusion on the outer periphery. The rotary body 18 etc. which have can be illustrated and a gear type rotary body etc. can be used besides this.

    Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 shows that the length of the trailing edge blank cut piece 14 of the sheet 1 is not sufficiently longer than the width of the shear cutting machine lower blade 6, so that the short trailing edge blank cutting piece 14 is naturally dropped by its own weight. Cannot be left on the upper blade surface of the lower cutter 6 of the shear cutting machine, which hinders subsequent cutting.

    In FIG. 8, a trailing edge margin cutting piece sweeper 19 is provided on the lower cutter 6 of the shear cutter, and the trailing edge margin cutter shown in FIG. The state where only the length required for cutting the piece 14 is left is shown. In this state, the trailing edge margin cutting piece sweeper 19 is pushed up onto the sheet by the uncut sheet trailing edge. The trailing edge blank cutting piece sweeper 19 is suspended at a pivot point or with a flexible material, and can sweep the blade surface of the shear cutter lower blade 6 by its own weight drop.

    FIG. 9 shows a state in which the trailing edge blank cutting piece 14 has been cut, and the trailing edge blank cutting piece sweeper 19 that has lost support from the trailing edge of the paper hangs down by its own weight and sweeps the trailing edge blank cutting piece 14 to the discharge port. I'm dropping it.

  Sheet cutting with two pairs of rollers and a cutting machine   The front margin of the paper is fed to the downstream side of the cutting machine   The front margin is cut and discharged   The paper trailing edge margin is left on the upstream side of the cutter   The trailing edge margin is cut and discharged   The shape of the rotating body used in the cutting piece discharge mechanism   The trailing edge margin is cut, and it cannot flow down naturally and remains on the cutting machine lower blade   Rear edge blank trimming scraper equipped   The trailing edge blank cut piece that has been cut by the trailing edge blank cutting piece scraper has been swept away.

1. Sheet of paper 2. 2. A pair of rollers on the upstream side of the cutting machine 3. A pair of rollers on the downstream side of the cutting machine Cutting machine 5. Shear cutting machine upper blade 6. 6. Shear cutting machine lower blade 7. Paper tip feed length 8. Distance between downstream roller pair / cutting machine Front end margin cutting piece 10. 10. Cutting piece discharge mechanism 11. Distance between upstream roller pair / downstream roller pair 12. Residual length at rear end of paper 13. Distance between upstream roller pair / cutting machine Rear edge margin cutting piece 15. Circular rotating body for cutting piece discharge 16. 16. Oval rotator for discharging cut pieces Rice ball type rotary body for discharging cut pieces 18. 18. Rotating body having cutting piece discharge protrusions Rear edge blank cutting machine

Claims (2)

    In a device that transports a sheet by two roller pairs and cuts the sheet into a predetermined length by a cutting machine positioned between the two roller pairs, the roller pair and the sheet are cut by sheet cutting. The blank cut piece by the rotating body that loses the support by the machine and pushes out the blank cut piece discharge path for the blank cut piece that naturally falls between the cutting machine and the roller pair, and prompts the discharge of these blank cut pieces Sheet cutting apparatus characterized by having a discharge mechanism     In a device that transports a sheet of paper by two pairs of rollers and cuts the sheet into a predetermined length by a cutting machine positioned between the two pairs of rollers, a blank cut piece generated by sheet cutting A sheet cutting apparatus comprising a mechanism for sweeping off blank margins that are short and light and cannot fall naturally and remain on the lower cutter fixed lower blade.

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