JP2008142791A - Paper sheet cutting blade polishing method and paper sheet cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet cutting device superior in cutting performance and durability by always maintaining a cutting blade in a state of rich cutting performance, by removing rust and other sticking objects by polishing an edge of the cutting blade in a process of cutting a paper sheet. <P>SOLUTION: This paper sheet cutting device has: a paper placing table 15 supporting the paper sheets P in a single or bundle shape; the cutting blade 25 cutting the paper sheets P on the paper placing table 15 along a preset cutting line; a driving means ML moving the cutting blade 25 between a preset standby position Hp and a cutting position Cp for cutting the paper sheets P; and a polishing member 37a arranged between the standby position Hp and the cutting position Cp for moving the cutting blade 25 and polishing the edge of the cutting blade 25. The cutting blade 25 is movably constituted in a turning-rotating loop-shaped locus or a reciprocating straight line-shaped locus along the cutting line X of the paper sheets P on the paper placing table 15. The cutting blade 25 is composed of a circular disk blade or a rectangular flat blade. The polishing member 37a is arranged in a moving locus of the cutting blade 25 to slidingly contact with its edge. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paper sheet cutting apparatus for cutting a paper sheet held on a paper table and a cutting blade polishing method thereof, and rotates a paper sheet set in a single or bundle on a paper table. The present invention relates to an improvement of a cutting mechanism for cutting with a blade or a flat blade.

  In general, this type of cutting apparatus is widely used as an apparatus for setting a single (one sheet) or a bundle (plural sheets) on a paper platform and cutting a predetermined portion thereof. For example, a cutter device that cuts roll paper carried out from a printer device into a predetermined length, or a cutter device that cuts a single paper leaf carried out from a printer device into half, quarter, etc. It is widely known as a cutting device that cuts and aligns the periphery of a bound sheet bundle (trimming cut).

  Conventionally, as such a cutting apparatus, for example, as disclosed in Patent Document 1, a cutting apparatus that sets a single sheet on a table and cuts the sheet, and as disclosed in Patent Document 2, for example, 2. Description of the Related Art A cutting device that sets a large number of sheets in a bundle and cuts them at a time is known. And as a cutting method, when cutting with a cutting blade that moves from one end of the sheet to the other end as in Patent Document 1 and a flat blade-shaped cutting blade (guillotine) from above the bundle-shaped sheet as in Patent Document 2 What is cut when the blade is lowered is known.

On the other hand, SK materials (carbon steel), SUS materials, ceramic materials, and the like are used as cutting blades used in the paper sheet cutting apparatus as described above depending on applications. The SK material is inexpensive and can be re-polished but has a characteristic that rust is likely to be generated. The SUS material and the ceramic material have a characteristic that the generation of rust is small but expensive.
Japanese Patent Laid-Open No. 10-138194 JP 2003-71780 A

  As described above, when a single paper sheet or a plurality of paper sheet bundles are cut along a predetermined cutting line, the rotary blade is moved along the cutting line as in the above-mentioned Patent Document 1 and cut. Alternatively, a conventional flat blade (guillotine blade) having a predetermined cutting length is used as in Patent Document 2 described above, or any one of the conventional methods is employed. In either case, SK material, SUS material, or ceramic material is used as the cutting blade.

  However, since cutting blades made of SUS material and ceramic material are expensive and difficult to regrind, a cutting apparatus equipped with these cutting blades is expensive and has a problem of high running cost. On the other hand, the SK material cutting blade is relatively inexpensive and easy to regrind, but has a problem that rust is likely to occur. Therefore, in the past, when the cutting blade is made of SK material, it has been attempted to perform surface treatment such as nickel plating on the surface. However, when re-polishing, the plating layer is peeled off, which causes rust. .

  On the other hand, when using a cutting blade of any material, for example, when cutting a bound sheet bundle, an adhesive may adhere to the blade edge. Further, in the case of coated paper such as photographic paper, the surface layer coating material may adhere to the blade edge. If these adhesives / coating materials adhere to the cutting edge, there is a problem that the cutting performance is deteriorated. At the same time, the adhesive / coating material or metal rust adhering to the cutting edge adheres to the cut surface of the paper sheet at the time of cutting, causing a problem of poor cutting quality.

  The present invention removes rust and other adhering substances by polishing the cutting edge of the cutting blade in the process of cutting paper sheets, and can always maintain the cutting blade in a state of high cutting ability. The main issue is to provide a sheet cutting device with excellent performance and durability. The present invention also provides a paper sheet cutting apparatus that does not require a special polishing mechanism by polishing a portion of the rotary blade that is different from the cutting position when cutting the paper while rotating it with a rotary blade. That is the issue. Further, according to the present invention, when cutting a paper sheet with a cutting blade that moves up and down from the standby position to the cutting position in the thickness direction, the abrasive powder adheres to the paper sheet by polishing the cutting blade at the standby position. The problem is to provide a paper sheet cutting device that does not have paper.

  To achieve the above object, the present invention employs the following configuration. A paper table 15 that supports the paper sheets P in a single or bundle shape, a cutting blade 25 that cuts the paper sheets P on the paper table 15 along a set cutting line, and a cutting blade 25 The driving means ML that moves between the preset standby position Hp and the cutting position Cp that cuts the paper sheet P, and the standby position Hp that the cutting blade 25 moves and the cutting position Cp are arranged and cut. And a polishing member 37a for polishing the cutting edge of the blade 25. Therefore, the cutting blade 25 is configured to be movable along a cutting locus X of the paper sheet P on the paper mount 15 (1) a loop-like trajectory that rotates, or (2) a linear trajectory that reciprocates. The polishing member 37a is disposed so as to be in sliding contact with the cutting edge during the movement locus of the cutting blade 25. The cutting blade 25 is constituted by a circular disk blade or a rectangular flat blade.

  The cutting blade 25 is configured to be movable in the paper thickness direction orthogonal to the cutting line X of the paper sheet P on the paper platform 15, and in this case, the polishing member 37a moves in the paper thickness direction. For example, the cutting blade 25 is disposed at a standby position (home position) Hp so as to be in sliding contact with the cutting edge of the cutting blade 25.

  Further, the cutting blade 25 is constituted by a flat guillotine blade having a cutting length of the paper sheet P. In this case, the polishing member 37a is disposed at a standby position (home position) Hp of the cutting blade.

  Circular rotary blade, paper platform 15 that supports paper sheets P in a single or bundle shape, and driving means for moving the rotary blades along cutting line X of the paper sheets P on the paper platform 15 ML and the grinding | polishing member 37a which grind | polishes the blade edge | tip of the said rotary blade are provided. The rotary blade is provided in the cutting blade holding means so as to be driven or rotated in accordance with the cutting of the paper sheet P, and the polishing member 37a is separated from the cutting portion Cp in contact with the paper sheet P of the rotary blade. It arrange | positions so that a non-cutting site | part NCp may slidably contact with a blade edge | tip. The polishing member 37a is provided with a biasing means that presses against the cutting edge of the rotary blade.

  The flat cutting blade 25, the paper platform 15 that supports the paper sheets P in a single or bundle shape, and the cutting blade 25 cuts the standby position Hp and the paper sheets P of the paper platform 15 shape. A cutting motion drive means ML that moves between the cutting position Cp and a polishing member 37a that polishes the cutting edge of the cutting blade 25 are provided. The polishing member 37a is disposed so as to be in sliding contact with the cutting edge of the cutting blade 25 at the standby position Hp, and polishing movement driving means for moving at least one of the polishing member 37a and the cutting blade 25 in a predetermined direction at the standby position Hp. Prepare.

  The polishing movement driving means moves the cutting blade 25 in a predetermined direction so as to be in sliding contact with the polishing member 37a at the standby position Hp, and the polishing movement driving means and the blade driving means ML are constituted by the same drive motor. Alternatively, the polishing movement driving means moves the polishing member 37a in a predetermined direction so as to be in sliding contact with the cutting blade 25 at the standby position Hp, and this polishing movement driving means is constituted by a drive motor different from the blade driving means ML.

  The polishing member 37a is configured to be movable between a polishing position in sliding contact with the cutting edge of the cutting blade 25 and a non-polishing position separated from the cutting edge.

  A method for polishing a rotary blade for cutting a paper sheet P supported on a paper table 15 while rotating along a predetermined cutting line X, wherein the paper sheet P on the paper table 15 is rotated by the rotary blade. When cutting the blade, the cutting edge is polished by the polishing member 37a at a non-cutting portion away from the cutting portion in contact with the paper sheet P of the rotary blade.

  A method of polishing a guillotine blade for cutting a paper sheet P supported on a paper platform 15 when moving from a standby position Hp to a cutting position Cp in a paper thickness direction orthogonal to a predetermined cutting line X, The cutting edge of the guillotine blade is polished by the polishing member 37a at the standby position Hp.

  Since the present invention is provided with a polishing member that polishes the cutting edge at the standby position or the cutting position with respect to the cutting blade that moves between the standby position and the cutting position, the cutting edge at each time of cutting of paper sheets or the timely The adhesive paste and other foreign matters that have been polished and adhered at the time of cutting can be removed. Therefore, it is possible to prevent the cutting blade / blade edge from being deteriorated due to the adhesion of foreign matters such as adhesive paste, and to always perform sharp cutting.

  Rust can be removed even when a relatively inexpensive SK material (carbon steel) is used as the cutting blade, and at the same time, rust and adhesives adhere to the cut surface of the paper sheet. Therefore, it is possible to provide a cutting device rich in cutting quality.

Furthermore, in the configuration in which the paper sheet is cut while being rotated by the rotary blade, a special polishing mechanism such as driving the polishing member by polishing the portion of the rotary blade different from the cutting position is required. There is nothing to do. Therefore, it is possible to provide an apparatus having a simple structure and excellent in machinability and durability.

  Similarly, in the configuration in which the paper sheet is cut with a cutting blade that moves up and down from the standby position to the cutting position in the thickness direction, a polishing member that polishes the cutting blade is disposed at the standby position so that the abrasive powder is cut during cutting. There is no fear of adhering to paper sheets.

  The present invention will be described in detail below based on the preferred embodiments shown in the drawings. FIG. 1 is a perspective view showing the overall configuration of a paper sheet cutting apparatus according to the present invention, and FIGS. 2 and 3 are partial explanatory views of the main part thereof.

  A paper sheet cutting apparatus A shown in FIG. 1 includes an apparatus frame 10, a paper table 15 that holds a bundle of paper sheets (hereinafter referred to as “paper sheets P”) such as paper sheets and plastic films, and the like. The pressing unit 20 presses and holds the paper sheet P on the paper table 15 and a cutting blade 25 that cuts the paper sheet P along a predetermined cutting line X. The cutting blade 25 cuts the paper sheet P in the process of moving in the bundle thickness direction perpendicular to the cutting line X and the traveling blade cutting structure that cuts the paper sheet P in the process of moving in the direction of the cutting line X. Guillotine cutting structure is adopted. The present invention is characterized in that the cutting edge is polished by the polishing member in the process of cutting the paper sheet P with such a cutting blade. The structure will be described below with reference to FIGS. 1 to 6 as to the traveling blade cutting structure, and based on FIGS. 8 and 9 as to the guillotine blade cutting structure.

[Configuration of device frame]
FIG. 1 shows a traveling blade cutting structure for cutting the paper sheet P when a plurality of cutting blades 25 move along the cutting line X. An apparatus frame 10 shown in the figure is composed of an appropriate frame that supports the paper platform 15, the cutting blade 25, and the press means 20. For example, when the apparatus frame 10 is incorporated in a bookbinding apparatus or the like, the apparatus frame 10 is arranged in a sheet bundle conveying mechanism, and has an appropriate structure according to the apparatus specifications. The illustrated one includes a fixed frame 11 and a movable frame 12 supported by the fixed frame 11. A paper mount 15 is integrally fixed to the fixed frame 11, and the movable frame 12 is supported so as to be movable up and down with respect to the paper mount 15. Referring to the structure shown in FIG. 1, the fixed frame 11 connects the lower frame 11 a constituting the paper mount 15, the upper frame 11 b approximately parallel to the upper frame 11 at a distance from the upper frame 11 a, and the upper and lower frames 11 a and 11 b. It consists of a frame with left and right side frames 11c, 11d. The movable frame 12 is fitted and held in guide grooves 11e and 11f formed in the side frames 11c and 11d of the fixed frame 11, and is supported so as to be movable up and down with respect to the paper mount 15. The vertical mechanism (shift means described later) will be described later.

[Configuration of the paper platform]
The paper platform 15 is composed of a table member for placing the paper sheets P in a bundle, and is fixed to the apparatus frame 10. The paper table 15 is configured in a horizontal posture, a vertical posture, or a posture inclined at a predetermined angle depending on the apparatus specifications. In other words, it is arranged in various postures according to the configuration of the transport path (not shown) for transporting the paper sheets to the paper table 15. For example, in the vertical posture, the paper sheets P are pressed against the paper table 15. The sheet P is configured to be held in cooperation with the holding nip means. The illustrated one is arranged on a conveyance path (not shown) for conveying the paper sheet P in a horizontal posture. In addition, the paper table 15 includes a rotary table (not shown) in an apparatus configuration (bookbinding apparatus, etc.) for trimming and cutting, for example, by rotating the paper sheet P to cut the top portion, the ground portion, and the fore edge portion. Is provided. The paper table 15 is provided with a fixed blade 48 (see FIG. 3) or blade receiving members 45a and 45b (see FIGS. 6A and 6B), which will be described later.

[Configuration of pressing means]
The above-described paper platform 15 is provided with pressing means 20 for pressing and holding the paper sheet P at the cutting position. This is because when the paper sheet P is cut by a cutting blade 25, which will be described later, the paper sheet P is held so as not to be displaced by the shearing force, and various mechanisms have been conventionally known. As an example, the pressing means 20 shown in FIG. 4A is configured to press and hold the paper sheet P on the paper table by the press member 22 via the pressure spring 21 to the movable frame 12 described above. ing. That is, two left and right support stems 21a and 21b are fitted and supported on brackets 12c and 12d formed integrally with the movable frame 12, and a plate-like press member 22 is connected and fixed to the support stems 21a and 21b. A pressure spring 21 (shown is a compression spring) is fitted between the brackets 12c, 12d and the press member 22.

  Accordingly, when the movable frame 12 is lowered by the shift means described later, the press member 22 presses the paper sheet P on the paper table. The press means 20 is configured to press the paper sheet P with a relatively weak force with a relatively simple mechanism, and a blade feed driving means (shift motor) MS of a shift means described later is also small and has a small capacity. It consists of an electromagnetic motor. As will be described later, since the sheet P on the paper platform is gradually cut from the uppermost sheet to the lower layer sheet, the shearing force of the cutting blade 25 is relatively small, and the pressing force for holding the sheet P is reduced. This is because there is no fear that the sheet will be misaligned.

  In addition, the pressing means 20 may have the following structure. As shown in FIG. 4 (b), the pressing means 20 is configured with a jack structure. For example, first swing levers 23a and 23b are pivotally supported on the fixed frame 11, and second swing levers 23c and 23d are pivotally supported on the first swing levers 23a and 23b, respectively. A pressing member 22 is rotatably supported on the moving levers 23c and 23d. The first and second swing levers 23a to 23d are connected by a ball screw 24 so as to approach and separate from each other. Therefore, if the ball screw 24 is rotated by the press motor MP, the first and second swing levers 23a to 23d are raised or fallen, and the press member 22 pressurizes the press member 22 in accordance with the thickness of the paper sheet P. Even with such a configuration, the paper sheet P on the paper platform 15 can be pressed and supported by the press member 22.

[Aspect in which the cutting blade is constituted by a disc blade]
The cutting blade 25 shown in FIGS. 1 and 2 includes a plurality of cutting edges that move along the cutting line X. The cutting blade 25 is constituted by (1) a circular disk blade 25A or (2) a rectangular flat blade 25B. The disc blade 25A of (1) is arranged so that one or more disc blades move along the cutting line X. FIG. 2A shows a case where a plurality of disc blades 25A are arranged at a predetermined interval L. The disc blades 25A are arranged along a cutting line X with cutting blade holding means 26 (shown is a chain structure). Body) at predetermined intervals L. The plurality of disk blades 25A are formed in a circular shape with the same diameter as shown in FIG. 2 or gradually with a large diameter along the cutting line X as shown in FIG.

  2 are arranged at an interval L shorter than the cutting length of the paper sheet P (L0 shown in FIG. 2). The disc blade 25A configured as described above adjusts the cutting amount by shifting the cutting blade holding means 26 in the orthogonal paper thickness direction by a blade feed mechanism described later while moving along the cutting line X.

  In the case of gradually increasing the circular shape as shown in FIG. 5D, the diameter Da of the first cutting blade 25a, the cutting depth Dx, the diameter Db of the second cutting blade 25b, the cutting depth Dy, When assuming the diameter Dc and the cutting depth Dz of the three cutting blades 25c, it is assumed that Da <Db <Dc, and the cutting depth Dz of the cutting blade having the maximum diameter (the third cutting blade 25c in the drawing) is the allowable maximum thickness. Set to. This eliminates the need for a blade feed mechanism that moves in the paper thickness direction. The cutting edge shape of these cutting blades 25 is formed as a single blade or a double blade. When the blade receiving side is constituted by a cutting plate-shaped blade receiving surface as will be described later, it is a fixed blade that sandwiches and cuts the blade receiving side into a double blade shape. When configured, it is configured in a single-edged shape.

[Aspect when the cutting blade is a flat blade]
When the cutting blade 25 is composed of a flat blade 25B, for example, as shown in FIG. 5B, the cutting blade 25 is formed into a rectangular flat blade 25B, and one or a plurality of cutting edges along the cutting line X Consists of. In the same manner as the above-described disk blade 25A, a plurality of sheets are arranged at a predetermined interval L shorter than the cutting length of the paper sheet P (L0 shown in FIG. 2). In addition, FIG. 5 (c) shows a case where the flat blade 25B has a fan shape, but the configuration is the same as the rectangular shape of FIG. 5 (b).

[Configuration of cutting blade holding means]
The cutting blades 25A and 25B having the above shapes are either (1) fixed to the cutting blade holding means 26x that draws an infinite loop locus, or (2) held by a slide member 26y that reciprocates along a cutting line X along a linear locus. Is done. First, the cutting blade holding means 26x of (1) will be described. As shown in FIG. 2, the cutting blade holding means 26x holds the cutting blades 25A and 25B so as to travel along the cutting line X. Therefore, the cutting blade holding means 26x is composed of a flexible endless belt such as a chain or a belt, and the illustrated one adopts a transmission chain structure. FIGS. 2 (a) and 2 (b) show an example in which a transmission chain is used for the cutting blade holding means 26. A link segment 26a made of resin or metal is connected in a chain with a connection pin 26b, and this connection A shaft roller 26c is fitted to the pin 26b so as to freely rotate. A plurality of disc blades 25A (see FIG. 2) or flat blades 25B (see FIG. 5 (b)) are attached to the cutting blade holding means 26x at a predetermined interval L.

  A disc blade 25A is axially supported on the connecting pin 26b between the left link segment 26aL and the right link segment 26aR connected in a chain form as shown in FIG. 2B, and the disc blade 26A has the connecting pin 26b. Installed to roll to the center. The diameter D of the disc blade 25A is formed with a dimension that does not interfere with the adjacent link segment 26a. The chain structure formed in this manner is meshed with a pair of left and right sprockets 27R and 27L, and each of the sprockets 27R and 27L is axially supported by the movable frame 12. A drive motor ML, which is a blade travel drive means, is connected to the left sprocket 27L in FIG. Reference numeral 28 in the drawing denotes a tension lever that adjusts the tension of the chain structure. That is, the tension lever 28 is urged clockwise in FIG. 2 by the spring 28a, and the cutting blade 25 always travels with a constant trajectory by the action of the spring 28a even if the chain structure is worn during use. Yes.

  When the cutting blade holding means 26x is formed of a chain structure as described above, in the case of the circular blade 25A shown in FIG. 2, the disk blade 25A is fitted and supported on the connecting pin 26b and rolls around the connecting pin 26b. To be supported. In the case of the flat blade 25B shown in FIG. 5B, it is firmly fixed to the connecting pin 26b. Although a roll chain is illustrated as the chain structure, it is needless to say that a resin molded chain such as a so-called silent chain may be used. The cutting blade holding means 26x is not limited to the chain structure described above, but may be a belt member such as a timing belt. In this case, a disk blade 25A or a rectangular flat blade 25B is screwed on the outer surface of the belt. Fix with etc. Similarly, a flexible member such as a wire can be used. In this case, the cutting blade is held in an abrasive holder that constitutes guide means to be described later so that it can run left and right, and is connected to the cutting blade. The cutting blade is caused to travel with a flexible member such as a wire.

  Accordingly, the cutting blade holding means 26x is stretched along the cutting line X of the paper sheet P held on the paper table 15, and the cutting blade 25 attached thereto moves in the left-right direction in FIG. . In this case, the cutting blade holding means 26x is arranged so as to draw a loop shape in a plane substantially parallel to the paper sheet P on the paper table 15 at a distance, or the loop shape is formed in a vertical plane. Arranged to draw. In this way, the rotary wheel 27 that stretches the cutting blade holding means 26x draws a loop in the horizontal plane even if the cutting blade holding means 26x is arranged so as to draw a loop in the vertical plane with respect to the paper table 15. Any of these may be arranged. When the loop is arranged in a horizontal plane, it is necessary to consider that the cutting blade 25 travels in an area that does not interfere with the paper sheet P on the paper platform.

[Configuration of different cutting blade holding means]
Next, the case where the cutting blade holding means 26 shown in FIG. 7 is configured by a slide member 26y that linearly reciprocates along the cutting line X will be described. The slide member 26y is formed of a suitably shaped plate member, and is slidably fitted and supported on a guide rail 29 provided on the movable frame 12. A plurality of cutting blades 25d, 25e, 25f such as disk blades and flat blades are fixedly supported on the slide member 26y. A driving belt 30 is stretched over the slide member 26y between a pair of left and right pulleys 30a and 30b, and a driving motor ML is connected to one pulley 30a. Accordingly, the slide member (cutting blade holding means) 26y is guided by the guide rail 29 by the forward / reverse rotation of the drive motor ML, and reciprocates along the cutting line X, and the cutting blades 25d, 25e, and 25f attached thereto are also FIG. 7A reciprocates in the left-right direction.

[Driving structure of cutting blade holding means]
As described above, the cutting blade holding means 26 including the plurality of cutting blades 25A and 25B is stretched around the pair of left and right rotating wheels 27 so as to move and travel along the cutting line X. That is, when the cutting blade holding means 26x is a chain structure, it is bridged between the aforementioned sprockets 27R and 27L, and when the cutting blade holding means 26 is a belt member, it is bridged between pulleys (27R and 27L). A blade travel drive means ML such as a drive motor is connected to one of the rotating wheels 27L.

[Configuration of guide means]
The plurality of cutting blades 25 supported by the cutting blade holding means 26x shown in FIG. 2A described above require guide means 35 so as to move linearly along the cutting line X. FIG. 3A shows the cross-sectional configuration. In the figure, guide means 35 for guiding the cutting blade 25 in a ruler shape along the cutting line X is provided, and the guide means 35 is disposed on the movable frame 12 or the fixed frame 11. The former will be described. As shown in FIG. 2, a guide member (guide means; the same applies hereinafter) 35 is fixed to the movable frame 12 along the cutting line X. The guide member 35 is provided with a guide groove 35a for fitting the cutting blade 25, and the guide groove 35a is slidably contacted with the shaft roller 26c of the chain structure to prevent the chain structure from meandering. A sliding contact surface 35b and a blade sliding contact surface 35c that slides in contact with the cutting blade 25A (or 25B) and guides the cutting blade 25A linearly along the cutting line X are provided.

  2A and 3A and the one shown in FIG. 5A are configured in different shapes, but the main point is that the cutting blade 25 accurately cuts the cutting line. What is necessary is just to comprise so that it may guide so that it may linearly move along X. Further, if the cutting blade 25 accurately moves linearly along the cutting line X when cutting the paper sheet P, the frictional resistance decreases as the sliding contact area of the blade sliding contact surface 35c decreases. Therefore, it is preferable to experimentally set the shape of the blade sliding contact surface 35 c according to the configuration of the cutting blade 25.

[Configuration of blade feed mechanism]
When the cutting blade 25A shown in FIG. 2A described above is used to cut a bundle of paper sheets P, it is necessary to gradually feed the blade from the upper layer paper to the lower layer paper. For this reason, the blade feeding mechanism 40 is provided in the apparatus of FIG. The blade feed mechanism 40 includes (1) a shift means 41 that moves the cutting blade holding means 26 up and down in the vertical direction with respect to the paper platform 15. The shift means 41 supports the sprockets 27R, 27L of the cutting blade holding means (chain structure) 26x on the movable frame 12 (bearing support), and moves the movable frame 12 itself up and down with respect to the paper table 15. Configure as follows. That is, the movable frame 12 is fitted and supported in guide grooves 11e and 11f formed in the fixed frame 11, and is configured to be movable up and down. The movable frame 12 is fitted with an eccentric cam 14 on a rotary shaft 13 provided on the fixed frame 11 and fixed to a bracket 16 having the eccentric cam 14. The rotary shaft 13 is connected to a shift motor MS that constitutes a blade feed driving means, and 13a in the figure is a transmission timing belt. Therefore, the shift means 41 includes the movable frame 12, the eccentric cam 14 that moves the movable frame 12 up and down, and the shift motor MS. A cutting blade holding means 26 and a cutting blade 25 are mounted on the movable frame 12.

[Configuration of blade support mechanism]
As described above, the blade receiving structure of the disc blade 25A and the flat blade 25B arranged at the predetermined interval L on the cutting blade holding means 26 will be described. The blade receiving mechanism that contacts the cutting edge of the cutting blade 25 is a mana plate-like shape. The blade receiving member 45 or the fixed blade 48 is used. The former blade receiving member 45 is made of a soft material such as rubber or resin, and is made of a blade receiving roller 45a or a blade receiving plate member 45b. The blade receiving roller 45a shown in FIG. 6A is incorporated in the paper table 15 so as to be freely rotatable (moving) along the cutting line X, and the blade P is set when the paper sheet P is set on the paper table 15. The receiving roller 45a is configured to roll. Accordingly, the blade receiving surface on the outer periphery of the roller changes its position in the outer peripheral direction every time cutting is performed, so that the outer periphery of the roller is almost uniformly worn and has a highly durable blade receiving structure. Further, the blade receiving plate member 45b shown in FIG. 6B is formed of a soft plate member. The blade receiving plate member 45b is configured to move in accordance with wear, thereby providing a blade receiving structure with high durability.

  Next, the fixed blade 48 will be described with reference to FIG. The fixed blade 48 is disposed longer than the maximum cutting length of the paper sheet P along the cutting line X, and is configured to sandwich and cut the paper sheet with the cutting blade 25. Particularly in the present invention, the fixed blade 48 is provided with a blade edge guide surface 49 for guiding the cutting blade 25 supported by the cutting blade holding means 26. This is because the cutting blade 25 is guided so as to be surely engaged with the fixed blade 48 when the lowermost layer paper on the paper table is cut. Therefore, the blade edge guide surface 49 is in a position where the cutting blade 25 is guided in the cutting line X direction in contact with the cutting blade 25 at a position where the cutting blade 25 is guided in the cutting line direction on the front side of the fixed blade 48 (upstream side where the cutting blade travels). Has been placed.

[Cutting structure with guillotine blade]
While the paper sheet P is cut by the cutting blade (disk blade, flat blade) 25 moving along the cutting line X as described above, the cutting blade 25 is moved in the paper thickness direction orthogonal to the cutting line X. The moving guillotine blade cutting structure will be described. As shown in FIG. 9, press means (not shown) is arranged on the paper mount 15 in the same manner as the above-described apparatus, and presses and holds the paper sheet P. A cutting blade 25C is supported on the device frame 56 so as to be movable in the vertical direction in the figure. The vertical support of the cutting blade 25C is configured such that, for example, an inclined guide groove 56a is provided in the apparatus frame 56, and the cutting blade 25C moves up and down in the inclination direction along the guide groove 56a. And the drive means 57 which moves this cutting blade 25C up and down is provided. The illustrated driving means 57 is composed of a driving arm 57a and a driving motor Mg that swings the arm. Accordingly, when the drive arm 57a is rotated clockwise in the drawing by the drive motor Mg, the cutting blade 25C connected (supported) to the tip of the arm is lowered, and the paper sheet P on the paper platform 15 is cut. The cutting blade 25 </ b> C configured in this way is configured by a flat flat blade (hereinafter referred to as “guillotine blade”) whose blade edge is longer than the cutting length of the paper sheet P.

[Configuration of blade edge polishing member]
The present invention is characterized in that the cutting blades 25 having the above-described configurations are equipped with the following polishing members. That is, (1) in the case of the above-described disk blade 25A, a structure for polishing the blade tip that rotates following cutting of a paper sheet (rotating blade polishing structure), (2) a flat blade 25B that moves in the cutting line X direction described above. In this case, a structure for polishing the cutting edge located at the standby position (traveling flat blade polishing structure), and (3) a structure for polishing the cutting edge positioned at the standby position (guillotine blade polishing structure) in the case of the above-described guillotine blade, respectively. . Each configuration will be described below.

[Rotating blade polishing structure]
The rotary blade polishing structure (1) travels along the cutting line X supported by the cutting blade holding means (chain structure) 26x as shown in FIG. This traveling draws a loop-like locus that turns along the cutting line X or a linear locus that reciprocates as described above. Accordingly, the non-cutting part (NCp shown in FIG. 3) separated from the cutting part (Cp shown in FIG. 3 (a)) where the rotary blade 25A (disk blade; the same applies hereinafter) moving along such a path contacts the paper sheet P. ) Is provided with a polishing member 37a. The illustrated one is provided with a polishing member mounting opening 37b in the above-described guide member 35, and the polishing member 37a is disposed in the opening 37b. The polishing member 37a is made of an elastic grindstone made of resin, diamond grindstone, metal file, paper (cloth file), or other abrasive material corresponding to the material of the rotary blade 25A. Then, the polishing member 37a is disposed at a position in contact with the blade tip surface of the rotary blade 25A in the polishing member mounting opening 37b, and is pressed by a leaf spring 37c or the like. The thus configured polishing member 37a polishes the cutting edge of the rotary blade 25A that rotates (driven rotation or drive rotation) when cutting the paper sheet P. Therefore, rust and other deposits generated on the blade edge are removed, and these deposits are prevented from adhering to the paper sheet.

[Running flat blade polishing structure]
The traveling flat blade polishing structure (2) travels along the cutting line X supported by the cutting blade holding means (sliding member) 26y described above according to FIGS. This traveling draws a linear trajectory along the cutting line X as described above. The slide member 26y moves from the standby position shown in FIG. 7B, that is, from the home position separated from the paper sheet P on the paper platform 15, for example, to the position for cutting the paper sheet P shown in FIG. To do. FIG. 8A is a sectional view taken along line xx in FIG. 8A, and FIG. 8B is a sectional view taken along line yy in FIG. Therefore, an abrasive holder 59 is disposed at the home position Hp, and the abrasive holder 59 has a guide groove 59a for guiding the cutting blade 25B that moves between the home position Hp and the cutting position of the paper sheet P. It is formed. A polishing member 37a that engages with the cutting edge of the cutting blade 25B is pressed against the guide groove 59a by a spring 47c (see FIG. 8C). In the illustrated example, two abrasive members 37 a that are in sliding contact with the abdomen and back of the blade edge are disposed in the abrasive holder 59.

  Accordingly, while the cutting blade 25B moves from the home position in FIG. 7B to the cutting position in FIG. 7A, the cutting edge of the blade is polished by the polishing member 37a in the abrasive holder 59 at the home position Hp. Become. When the drive motor ML provided in the cutting blade holding means (sliding member) 26y reciprocates a predetermined amount at the home position, the cutting blade 25B attached thereto also reciprocates a predetermined distance. As a result, the cutting edge 25B is polished by the polishing member 37a repeatedly while waiting at the home position.

[Guillotine blade polishing structure]
The guillotine blade polishing structure (3) moves up and down between the home position retracted above the paper platform 15 and the cutting position for cutting the paper sheet P as described above with reference to FIG. Therefore, a polishing member 37a is provided in an appropriate apparatus frame at the home position of the guillotine blade 25C, as shown in cross sections in FIGS. 10 (a) to 10 (c). The polishing member 37a can be moved up and down in the state shown in FIGS. 5B and 5C, which are in sliding contact with the blade surface along the guide groove 60 provided in the apparatus frame, and in the state shown in FIG. It is supported. And it is always urged | biased by the side which slidably contacts with the blade edge surface with the spring 60a. The polishing member 37a is made of the same material as described above.

  Therefore, when the guillotine blade 25C is moved up and down between the home position and the cutting position by the cutter motor MC, the guillotine blade 25C reciprocates from the state shown in FIG. 10A to the state shown in FIG. Then, the cutting edge of the guillotine blade moves the polishing member 37a up and down against the spring 60a. At this time, the cutting edge surface is polished by the polishing member 37a when moving from the state shown in FIG. 5B to the state shown in FIG. In this case, by reciprocating the cutter motor MC by a predetermined amount at the home position (the state shown in FIG. 10A), the state shown in FIG. 10B and the state shown in FIG. Is done.

[Description of cutting blade polishing method]
Next, the cutting blade polishing method of the present invention will be described. In the above-described structure of the rotary blade polishing, when the rotary blade 25A cuts the paper sheet P on the paper table with the rotary blade 25A, This is a method of polishing the cutting edge with a polishing member 37a at a non-cutting portion (NCp in FIG. 3) away from a cutting portion (Cp in FIG. 3) in contact with the paper sheet P, and the structure thereof is as described above. It is. In this way, the paper sheet P on the paper table is cut while being rotated along the predetermined cutting line X by the rotary blade 25A. At this time, the rotary blade 25A is characterized in that the cutting edge of the rotary blade 25A that rotates (drive rotation or driven rotation) in the process of moving along the cutting line X is polished at a non-cutting position NCp away from the cutting position Cp.

  Next, in the above-described polishing method for the guillotine blade 25C, the guillotine blade 25C is polished by the polishing member 37a at the standby position (for example, the home position). This method employs a structure in which the guillotine blade 25C is polished by the polishing member 37a at the standby position where the guillotine blade 25C is retracted from the paper platform 15. As a result, the guillotine blade 25C polishes the cutting edge at the home position, and it is not necessary to provide a special driving means for polishing.

The perspective view which shows the whole structure of the paper sheet cutting apparatus concerning this invention. It is principal part explanatory drawing of the apparatus of FIG. 1, (a) is the arrangement | positioning state of a cutting blade, (b) is the connection structure of the chain which comprises a cutting blade holding means, (c) is a cutting blade (disk blade). Indicates the state. It is explanatory drawing of the cutting blade guide mechanism in the apparatus of FIG. 1, (a) shows an expanded sectional view, (b) shows the block diagram of an abrasive member. It is explanatory drawing of the press means in the apparatus of FIG. 2, (a) and (b) shows different embodiment, respectively. 2 shows the form of the cutting blade holding means different from the apparatus of FIG. 2 and the cutting blade attached thereto, (a) is an overall explanatory view thereof, (b) and (c) are explanatory views showing the shape of the cutting blade, (D) is a block diagram of the disc blade different from FIG. It is a block diagram of the blade receiving member in the apparatus of FIG. 1, (a) shows the case where a roller member is used, (b) shows the case where a plate-shaped member is used. The form of the cutting blade which attached the cutting blade holding | maintenance means different from the apparatus of FIG. 2 to this is shown, (a) shows a cutting state, (b) shows a standby position. It is a block diagram of the cutting blade holding | maintenance means of the apparatus of FIG. 7, (a) shows sectional drawing, (b) shows an engagement state with an abrasive member, (c) is a principal part enlarged view of (b). It is. The shape of the cutting blade different from the apparatus of FIG.2 and FIG.7 is shown. It is explanatory drawing which shows the grinding | polishing operation | movement of the cutting blade in the apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Apparatus frame 11 Fixed frame 11a Lower frame 11b Upper frame 11c Side frame 11d Side frame 11e Guide groove 11f Guide groove 12 Movable frame 13 Rotating shaft 14 Eccentric cam 15 Paper mount 16 Bracket 20 Press means 21 Pressing spring 21a Support stem 21b Support stem 22 Press member 23a, 23b First swing lever 23c, 23d Second swing lever 25 Cutting blade 25A Disc blade 25B Flat blade 25C Guillotine blade 26 Cutting blade holding means 26a Link segment 26b Connecting pin 26c Shaft roller 27 Rotation Rings 27R, 27L Sprocket (pulley)
28 Tension lever 35 Guide means (guide member)
35a Guide groove 35b Chain sliding contact surface 35c Blade sliding contact surface 37 Polishing means 40 Blade feed mechanism 45 Blade receiving member 48 Fixed blade 49 Cutting edge guide surface A Paper sheet cutting device ML Drive motor (blade traveling drive means)
MP press motor MS shift motor (blade feed drive means)
P Paper sheet X Cutting line

Claims (12)

A paper platform for supporting paper sheets in a single or bundle form;
A cutting blade for cutting the paper sheets on the paper table along a set cutting line;
Driving means for moving the cutting blade between a preset standby position and a cutting position for cutting the paper;
A polishing member that is disposed between the standby position where the cutting blade moves and the cutting position and polishes the cutting edge of the cutting blade;
A paper sheet cutting apparatus comprising: The cutting blade is configured to be movable along (1) a loop-like trajectory that rotates and (2) a linear trajectory that reciprocates along the cutting line of the paper sheet on the paper table,
2. The paper sheet cutting apparatus according to claim 1, wherein the polishing member is disposed so as to be in sliding contact with a cutting edge of the cutting blade during a movement locus of the cutting blade. The paper cutting apparatus according to claim 2, wherein the cutting blade is configured by a circular disk blade or a rectangular flat blade. The cutting blade is configured to be movable in a paper thickness direction orthogonal to a cutting line of a paper sheet on the paper platform,
2. The paper sheet cutting apparatus according to claim 1, wherein the polishing member is disposed so as to be in sliding contact with a cutting edge of a cutting blade that moves in a paper thickness direction. 5. The paper sheet cutting apparatus according to claim 4, wherein the cutting blade is constituted by a flat guillotine blade having a cutting length of the paper sheet. A circular rotary blade,
A paper platform for supporting paper sheets in a single or bundle form;
Driving means for moving the rotary blade along the cutting line of the paper sheets on the paper table;
A polishing member for polishing the cutting edge of the rotary blade;
With
The rotary blade is provided in the cutting blade holding means so as to be driven or driven to rotate with the cutting of the paper sheet,
The polishing member is disposed so as to be in sliding contact with the blade edge at a non-cutting portion away from a cutting portion in contact with the paper sheet of the rotary blade,
The paper sheet cutting apparatus according to claim 1, wherein the polishing member is provided with an urging means that presses against the cutting edge of the rotary blade. A flat cutting blade;
A paper platform for supporting paper sheets in a single or bundle form;
Cutting motion driving means for moving the cutting blade between a standby position and a cutting position for cutting the paper-sheet-like paper sheet;
A polishing member for polishing the cutting edge of the cutting blade;
With
The polishing member is
It is arranged to be in sliding contact with the cutting edge of the cutting blade at the standby position,
A paper sheet cutting apparatus comprising: a polishing movement driving means for moving at least one of the polishing member and the cutting blade in a predetermined direction at the standby position. The polishing movement driving means moves the cutting blade in a predetermined direction so as to be in sliding contact with the polishing member at the standby position, and the polishing movement driving means is constituted by the same drive motor as the blade driving means. 8. The paper sheet cutting apparatus according to claim 7, wherein The polishing movement driving means moves the polishing member in a predetermined direction so as to be in sliding contact with the cutting blade at the standby position, and the polishing movement driving means is constituted by a drive motor different from the blade driving means. The paper sheet cutting apparatus according to claim 7. The paper sheet cutting according to any one of claims 1 to 9, wherein the polishing member is configured to be movable between a polishing position in sliding contact with the cutting edge of the cutting blade and a non-polishing position spaced from the cutting edge. apparatus. A method of polishing a rotary blade that cuts paper sheets supported on a paper table while rotating along a predetermined cutting line,
When cutting the paper sheet on the paper table with the rotary blade, the blade edge is polished with a polishing member at a non-cutting site away from the cutting site in contact with the paper sheet of the rotary blade. Kind of cutting blade polishing method. A method of polishing a guillotine blade that cuts paper sheets supported on a paper platform when moving from a standby position to a cutting position in a paper thickness direction orthogonal to a predetermined cutting line,
A cutting blade polishing method for a paper sheet, wherein the cutting edge of the guillotine blade is polished by a polishing member at the standby position.

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