JP5384842B2 - Paper sheet cutting device - Google Patents

Description

  The present invention relates to a cutting device that cuts paper sheets set on a paper table, for example, aligns sheets formed with an image by an image forming apparatus or the like into a bundle, and uses a predetermined cutting line. The present invention relates to an improvement of a cutting apparatus for cutting.

  In general, this type of cutting apparatus is widely used as an apparatus for setting paper sheets on a paper table and cutting a predetermined portion thereof. For example, a sheet fed from a printer device or the like is aligned in a bundle and bound in a bookbinding manner, and a trimming device that trims and aligns the peripheral edge of the bound sheet bundle, or a sheet from an image forming device is halved, It is known as a cutting device that cuts in half.

  Conventionally, as such a cutting apparatus, for example, as disclosed in Patent Document 1, there are many cutting apparatuses that set a single sheet on a table and cut the sheet, and as disclosed in Patent Document 2. 2. Description of the Related Art A cutting apparatus that sets a single sheet in a bundle and cuts the sheet at a time is known. And as a cutting method, when cutting with a cutting blade (rotary blade) that moves from one end of the sheet to the other end as in Patent Document 1, and flat plate cutting from above the bundle-shaped sheet as in Patent Document 2 What cuts when a blade (guillotine blade) descends is known.

  Therefore, as in the above-mentioned Patent Document 1, in the mechanism for cutting by cutting one sheet cutting blade (rotating blade) from one end of the sheet to the other end, the cutting blade can be cut by cutting a plurality of sheet bundles at once. There is a known problem of meandering when the cutting blade is run with a force that surpasses the shearing force. For this reason, conventionally, such a rotary blade cutting mechanism is employed when cutting one or a small number of sheets. Accordingly, it is impossible to cut a large number of sheet bundles with such an apparatus.

Further, when a large number of sheet bundles are cut at once with a cutting blade (guillotine blade) that moves up and down in the thickness direction as in Patent Document 2, a press that firmly holds the sheet bundle at the cutting position. Means are needed. This document is provided with a pressure member (pressing plate) that presses and holds a sheet bundle placed on a paper table (rotary table). The pressure member is arranged so as to move up and down between a standby position spaced upward from the sheet surface and a sheet pressure position that presses the sheet surface, and is moved up and down by a pressure device (pressure cylinder). It is configured. And the mechanism which drives a cutting blade to the downward direction from the upper direction with the cutter drive means (cutter cylinder) different from this pressurization apparatus is disclosed.
Japanese Patent Laid-Open No. 10-138194 JP 2003-71780 A

  As described above, when placing and supporting a plurality of paper sheets on a paper table and cutting them, a pressurizing mechanism for pressing and holding the paper sheet bundle and a cutting mechanism for cutting the paper sheet bundle are: Conventionally, it is configured to move up and down with respect to the paper sheet on the paper table by different driving devices as in the above-mentioned Patent Document 2. That is, a pressure member (for example, a pressure plate) that presses the sheet bundle is provided with a pressure driving means (motor, hydraulic cylinder, etc.) that moves the sheet bundle up and down, and a cutting blade that cuts the sheet bundle moves the plate up and down. The cutting drive means which moves is provided.

  In this way, the pressure member and the cutting blade (movable cutting blade) that move up and down with respect to the sheet bundle on the paper table are driven by different driving devices, and the operation timing is achieved by the control means. For this reason, before the pressure member is reliably pressed and held, the cutting blade may start cutting the paper sheet in a state where the pressure is insufficient, which may cause a cutting failure due to the misalignment of the paper sheet. In addition, there is a known problem that when the pressure member and the cutting blade are driven by different driving devices, the driving mechanism becomes large and the cost is high.

  Therefore, the present inventor attempted to reduce the size and cost of the apparatus by driving the pressure member and the cutting blade with the same driving apparatus. As the mechanism, the present inventor arranges the pressurizing member above the paper platform so that the pressurizing member can be moved up and down, and the pressurizing member biased by the pressurizing spring in the direction of pressing the paper sheet is interlocked with the vertical movement of the cutting blade. It came to devise retreating upward away from the paper surface.

  In this case, the vertical stroke of the cutting blade is set to be larger than the vertical stroke of the pressure member with respect to the paper sheet on the paper table. Accordingly, the pressure member is raised against the urging spring in conjunction with the ascending operation of the cutting blade, and both of them are put on standby at a position where the cutting blade and the pressure member are spaced upward from the sheet surface. Then, in a state where the cutting blade and the pressure member are kept waiting above the paper sheet surface, the paper sheet is set on the paper table or the cut paper sheet is carried out.

  By adopting such a mechanism, it is possible to achieve downsizing and cost reduction of the drive device. However, if the pressure member is made to wait above the sheet surface under the action of the biasing spring, the pressure member Alternatively, there arises a problem that the cutting blade that moves up in conjunction with this lowers downward by the force of the spring. In other words, when the drive motor (drive device) that drives the cutting blade is stopped at the standby position, the driving force does not act, so the pressing member and the cutting blade interlocking with the pressing member are inadvertently disposed on the sheet surface side by the action of the biasing spring. There is a risk of descent. For this reason, when the driving motor is restarted and the cutting blade is driven from the standby position toward the bottom dead center, the operating position becomes out of order. Further, when a cutting jam or the like occurs, even if the movable cutting blade is made to stand by at the upper standby position, it may be inadvertently lowered, so that jam handling becomes very dangerous.

  In the present invention, when cutting a sheet bundle on a paper table, a press mechanism that presses and holds the sheet bundle and a cutter mechanism that cuts the sheet bundle can be configured in a small and inexpensive manner. The main issue is the provision of leaf cutting devices.

  In order to achieve the above object, the present invention provides a pressure member and a movable cutting blade that are supported by a device frame so as to be movable up and down with respect to a sheet on a paper table. It is configured to move up and down. The pressure member is provided with a pressure spring that urges the sheet in the direction in which the sheet is always pressed, and the drive motor waits at a standby position where the pressure member is spaced upward from the sheet against the pressure spring. To stop. Therefore, the movement restricting means for preventing the pressure member from descending downward by the action of the pressure spring at this standby position is arranged between the drive motor and the pressure member. The configuration will be described in detail below.

A paper loading table for placing the sheet bundle, and availability dynamic cutting blade you cut along the sheet bundle on the sheet loading table to a predetermined cutting line, a machine frame for vertically movably supporting the movable cutting blade Driving means for moving the movable cutting blade up and down between a cutting position for cutting the sheet on the paper table and a standby position spaced above the sheet; and the paper in conjunction with the vertical movement of the movable cutting blade A pressure member that presses the sheet bundle on the mounting table .
The pressurizing member is biased in the direction of pressing the sheet bundle on the paper platform by a pressurizing spring, and is moved from the sheet bundle in conjunction with the movement of the movable cutting blade from the cutting position to the standby position. configured so as to separate, the drive means is arranged on the apparatus frame, occurring at least one drive rotary member coupled to move up and down the movable cutting blade, the rotary motion to the driving rotary member driving It comprises a motor and drive control means for controlling the drive motor.
Further, the drive control means is configured to stop the drive motor at a standby position spaced upward from the sheet bundle on the paper table and to make the movable cutting blade stand by. between the blades, the movable cutting blade of the standby position, to place the movement restricting means for preventing the dropping it down the action of the pressure spring.

  The movement restricting means is (1) a rotation locking claw disposed on the drive rotation member, (2) a one-way rotation clutch disposed on the drive rotation member, or (3) disposed on the drive rotation member. It consists of a braking member.

  The apparatus frame includes a base plate disposed in a direction substantially orthogonal to the sheet surface of the paper table, and a pressing member disposed to face the base plate with a predetermined distance therebetween, and The pressure member and the movable cutting blade are supported between the base plate and the pressing member so as to move up and down in a direction perpendicular to the sheet surface on the paper table.

  The drive rotation member is composed of a rotation shaft arranged in the apparatus frame and an arm member or an eccentric cam member connected to the rotation shaft.

  The movable cutting blade is configured to be connected to a drive rotation member and move up and down between a top dead center and a bottom dead center of the drive rotation member. The pressure member is configured to move up and down in conjunction with the up and down movement of the movable cutting blade. Accordingly, the standby position of the pressurizing member is set to a position displaced by a predetermined angle from the top dead center of the drive rotating member to the front side in the rotational direction. The motion restricting member is engaged at the standby position so as to prevent reverse rotation of the drive rotating member.

  When the drive control unit controls the drive motor, the drive rotary member is temporarily stopped at the standby position where the drive rotary member is displaced by a predetermined angle from the top dead center to the front side in the rotation direction, and the movable cutting blade and the pressurizing unit are pressed. The member is placed on the upper side of the paper platform, and after the sheet is set on the paper platform, the driving rotation member is rotated from the top dead center to the bottom dead center so that the pressure member is placed on the paper platform. The sheet is pressed and supported, and then the movable cutting blade is configured to cut the sheet.

  The movable cutting blade includes a cutting edge inclined at a predetermined angle in a vertical cutting direction so as to gradually cut a sheet on the paper table from one end to the other, and the paper table has a sliding edge with the movable cutting blade. A flat plate-shaped fixed cutting blade is provided so as to be movable in the paper surface direction perpendicular to the cutting line. Therefore, the movable cutting blade and the cutting edge of the fixed cutting blade are disposed opposite each other with a predetermined angle with respect to the other so that they intersect each other in the cutting line direction. In this crossed state, the fixed cutting blade is configured to move in the paper surface direction perpendicular to the cutting line by the downward movement of the movable cutting blade.

  The paper table and / or the fixed cutting blade is provided with a biasing means for elastically pressing the fixed cutting blade against the movable cutting blade.

  According to the present invention, a pressure member and a movable cutting blade supported by a device frame so as to be movable up and down with respect to a sheet on a paper table are moved up and down between a top dead center and a bottom dead center by rotation of a driving rotary member. Configure as follows. The pressure member is provided with a pressure spring that urges the sheet in the direction of pressing the sheet at all times, and the drive member rotates so that the pressure member stands by at a standby position spaced upward from the sheet against the pressure spring. Stop the drive motor of the member. Therefore, the movement regulating means for preventing the pressure member from descending downward by the action of the pressure spring is disposed between the drive motor and the pressure member at the standby position, and the following effects are obtained.

  The pressure member and the movable cutting blade, which are arranged on the paper table so as to be movable up and down, both move up and down by the rotational movement of the drive rotary member, and this drive rotary member is driven and rotated by a single drive motor. Therefore, compared with the conventional pressurizing member and movable cutting blade that are moved up and down by individual driving devices (motor, hydraulic mechanism, etc.), the driving device can be configured to be small and light with a simple structure.

  Further, in the present invention, the pressure member is configured to always press the sheet on the paper table with the pressure spring, and the movement restricting means is moved to the standby position above the paper surface against the urging force of the spring by the rotation of the drive rotation member. Since the position is maintained, the pressing member and the movable cutting blade are not lowered downward in the cutting direction by the spring force of the pressing spring that always operates. Therefore, even when a paper jam occurs when feeding or discharging sheets (bundles) on the paper platform, the pressure member and the movable cutting blade stand by at a standby position above the paper platform, and are held at this position by motion restricting means. Therefore, processing such as removal of jam sheets can be performed safely.

  Further, according to the present invention, the standby position of the pressurizing member is set to a position displaced by a predetermined angle from the top dead center of the drive rotation member to the front side in the rotation direction, and a motion regulating member is provided on the drive rotation member to prohibit the reverse rotation. Thus, the movable cutting blade can be placed on the upper side of the paper platform simultaneously with the pressing member. Thereby, a pressurization member and a movable cutting blade can be made to wait reliably above a sheet with a simple structure.

  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 sheet bundle cutting device (trimmer unit) according to the present invention, and FIG. 2 is a front view thereof. FIG. 3 is a rear view of the apparatus of FIG. 1, and FIG. 4 is an explanatory diagram of the configuration of the cutting edge press means.

  A paper sheet bundle cutting apparatus (trimmer unit) A shown in FIG. 1 includes a paper table 15 for loading and supporting paper sheets P, a press means 20 for pressing and holding the paper sheets P on the paper table, and a paper sheet. The movable cutting blade 25 cuts the leaves P along a predetermined cutting line CL, and a fixed cutting blade 28 provided integrally with the paper mount 15. These paper table 15, pressing means 20, and movable cutting blade 25 are attached to an apparatus frame (base plate described later) 10. Each configuration will be described below.

[Configuration of device frame]
The apparatus frame 10 is equipped with a paper platform 15, a movable cutting blade 25, and a press means 20, and is made of a steel plate having a thickness appropriate for the mechanical strength according to the cutting of the paper sheet P, for example. The apparatus frame 10 shown in FIG. 1 is composed of a flat base plate arranged in a direction orthogonal to the paper surface of the paper sheet P (the Z direction shown in FIG. 1; the vertical direction). The flat base plate (apparatus frame) 10 is provided with a cutting opening 12 for feeding and discharging the paper sheet P, and a direction in which a paper mount 15 (to be described later) is orthogonal to the cutting opening 12 (the Y direction shown in the figure). ). The base plate 10 has a pair of left and right drive rotation members 13d and 13f (hereinafter, collectively referred to as reference numeral 13) that support the movable cutting blade 25 on the front side, and a pair of drive rotation members on the back side. A transmission chain 29 for synchronously rotating the member 13 is disposed (details will be described later).

[Configuration of the paper platform]
A paper platform 15 having a fixed cutting blade 28 is attached to the cutting opening 12 of the base plate 10 described above. The paper platform 15 is configured by a placement member such as a tray that holds a paper sheet (or a bundle of paper sheets) to be cut in a predetermined posture. The shape may be a shape that supports the entire paper sheet P, or a shape that partially supports the cutting edge of the paper sheet P as shown in the figure. As shown in FIG. 4, the illustrated paper platform 15 is composed of a beam-shaped member having a predetermined length along a cutting line CL. The beam-shaped member has a fixed cutting blade 28 at a cutting edge along the cutting line CL. It is attached integrally. That is, as shown in FIG. 7, a step 15w is provided along the cutting edge CL on the paper platform 15, and a plate-like fixed cutting blade 28 is embedded in the step 15w. The fixed cutting blade 28 is made of a tough material such as carbon steel, cemented carbide or stainless steel.

  A pair of left and right guide members 17R and 17L (see FIG. 4) are integrally attached to the paper table 15 with bolts or the like along a cutting line CL. A guide groove 17g is formed in the pair of left and right guide members 17R and 17L so as to guide a pressurizing plate 21 described later so as to be movable up and down.

[Fixing cutting blade positioning mechanism]
As described above, the fixed cutting blade 28 integrally attached to the paper platform 15 is configured separately from the base plate 10, and is pressed against the movable cutting blade 25, which will be described later, by the biasing means 16 disposed between the base plate 10. Has been. The configuration will be described with reference to FIG. 7 (sectional view) and FIG. 8 (exploded view). The paper table 15 is integrally provided with a fixed cutting blade 28 and a pair of guide members 17R and 17L (hereinafter referred to as “paper table assembly 15”). The paper table assembly 15 is fitted and supported in the cutting opening 12 of the base plate 10 so as to be movable in the cutting orthogonal direction (Y direction shown in FIG. 7). A movable cutting blade 25 is axially supported by a drive rotating member (driving side) 13d and (driven side) 13f that are rotatably supported by the base plate 10. The movable cutting blade 25 is composed of a blade receiving holder 25h and a blade edge member 25c, and is fitted and supported on the transmission pin 13p of the drive rotating member 13 via a bearing sleeve 13s.

  Therefore, the above-described guide members 17R, 17L and the movable cutting blade 25 are sandwiched between the base plate 10 and the pressing member 19. A pressing member 19 (a pair of left and right stay members in the figure) is fixed to the base plate 10 with bolts or the like at a predetermined interval Ld. Guide members 17R and 17L and a movable cutting blade 25 are sandwiched between the base plate 10 and the pressing member 19 (see FIG. 7). At this time, an urging means 16 composed of a compression spring is provided between the base plate 10 and the guide members 17R and 17L so as to press the guide members 17R and 17L against the movable cutting blade 25. Therefore, the fixed cutting blade 28 integral with the guide members 17R and 17L is always urged by the movable cutting blade 25. The biasing means 16 is not limited to the illustrated spring, and may be constituted by a spacer made of an elastic member such as sponge or rubber.

  Further, as shown in FIG. 2, a lubricating paint 25q is applied to the cutting blade side of the movable cutting blade 25 that slides in the vertical cutting direction between the base plate 10 and the pressing member 19. The movable cutting blade 25 slides smoothly between the pressing member 19 and moves up and down by the lubricating paint 25q.

  In the above-described configuration, the pressure plate 21 is disposed between the base plate 10 and the movable cutting blade 25. As shown in FIG. 10, a flat plate-like pressure plate 21 is sandwiched between the base plate 10 and the movable cutting blade 25, and a lower end surface (paper pressure surface described later) 21p of the pressure plate 21 is placed on the paper platform. It arrange | positions in the position which press-supports a paper sheet surface. The guide groove 17g formed in the above-described guide members 17R and 17L supports the pressure plate 21 so as to be movable up and down. A bent piece 10r is formed on the base plate 10, and a pressure spring 18 is fitted to the bent piece 10r to press and urge the pressure plate 21 downward in FIG. 9B. Accordingly, the pressure plate 21 disposed between the base plate 10 and the movable cutting blade 25 is configured such that the lower end surface (paper pressure surface) 21p presses the paper sheet surface on the paper table 15.

  The lower end surface (paper pressure surface) 21p of the pressure plate 21 is bent in an L shape as shown in FIG. 7, and the paper pressure surface (lower surface; the lower surface; so as to sandwich the paper sheet P between the paper plate 15 and the paper plate P. The same applies hereinafter) 21p is formed. Thus, the pressure plate 21 reliably presses and holds the paper sheet with the paper pressure surface 21p bent at the lower end thereof. For this reason, the paper pressure surface 21p is coated with a high friction paint. The paper sheet is held on the paper table 15 by the friction paint without being displaced. Further, the fixed cutting blade 28 integrally attached to the paper platform 15 is also coated with a high friction paint at a position facing the paper pressure surface 21p of the pressure plate 21.

  The pressure plate 21 described above is acted upon by the non-operating position (home position) where the movable cutting blade 25 moves up and down and away from the paper sheet surface above the paper table 15 and the pressure spring 18. Then, it moves up and down between the operating position for pressing the paper surface on the paper table 15. Therefore, the upper end flange portion 25f of the movable cutting blade 25 and the engagement piece 21k of the pressure plate 21 are configured to engage with each other. Therefore, the movable cutting blade 25 and the drive rotating member 13 that moves up and down the same constitute a pressure releasing means.

  Next, the relationship between the fixed cutting blade 28 and the movable cutting blade 25 will be described with reference to the operation state explanatory diagram shown in FIG. As will be described later, the movable cutting blade 25 is supported by a pair of left and right drive rotation members 13d and 13f, and moves up and down with respect to the paper table 15 by the rotation. Therefore, in the state shown in FIG. 6A where the movable cutting blade 25 stands by above the paper platform, the pressure plate 21 interlocked with the movable cutting blade 25 stands by at the non-operating position (standby position). In this state, the paper sheet P is inserted and set on the paper table 15. At this time, the fixed cutting blade 28 integral with the paper platform 15 is elastically pressed against the movable cutting blade 25 by the spring force (elastic force) of the biasing means 16. That is, the guide members 17R and 17L integrated with the fixed cutting blade 28 are elastically pressed by the urging means 16 (the illustrated one is a compression spring) to the blade holder 25h of the movable cutting blade 25, and the movable cutting blade 25, the fixed cutting blade 28, and the like. Are positioned in close sliding contact with each other.

  Therefore, after the paper sheet P is fed and set on the paper platform 15, when the drive rotating member 13 is rotated in a predetermined direction, the movable cutting blade 25 descends from the top dead center p1. When the movable cutting blade 25 is lowered by a predetermined amount, the pressure plate 21 is also lowered toward the sheet surface, and the upper end flange portion 25f of the movable cutting blade 25 is separated from the engagement piece 21k of the pressure plate 21. Then, the lower end surface (paper pressure surface) 21p of the pressure plate 21 presses the sheet surface by the action of the pressure spring 18. This state is shown in FIG. 9B, and the pressure plate 21 presses the paper platform 15 from above by the action of the pressure spring 18. Therefore, the fixed cutting blade 28 provided on the paper platform 15 is positioned at a position where it is slidably contacted with the movable cutting blade 25 by the urging means 16, and is held by the pressure plate 21 in this state. Therefore, when cutting the paper sheet P with the movable cutting blade 25, the fixed cutting blade 28 does not escape even if a force in the direction of the arrow shown in the drawing acts due to the shearing force. As a result, the urging force of the pressure spring that urges the fixed blade toward the cutting blade can be set small, and the apparatus can be miniaturized.

  The spring force of the pressure spring 18 acting on the pressure plate 21 and the biasing means 16 acting on the fixed cutting blade 28 is set so that the pressure spring side becomes large. That is, when the pressure plate 21 is in the non-operating position, the fixed cutting blade 28 moves to a position where it comes into contact with the movable cutting blade 25 by the spring force (elastic force) of the urging means 16, but the pressure plate 21 is in the operating position. In some cases, the spring force is set so that the pressure spring 18 is held at that position and does not move easily.

[Configuration of movable cutting blade]
As shown in FIG. 1, the movable cutting blade 25 is composed of a plate-shaped blade edge member 25c and a blade receiving holder 25h. The blade holder 25h is formed of a member having mechanical strength that can withstand the drag generated by cutting the sheet bundle, and a concave groove 25w for mounting the blade member 25c is formed at the lower edge thereof. Reference numeral 25b denotes a stay for reinforcement, which is integrally fixed to the blade holder 25h along the cutting line CL. A blade member 25c is attached to the recessed groove 25w with an adhesive tape or the like. The blade member 25c is inclined at a predetermined angle in the direction of the cutting line CL so as to gradually cut the paper sheet P from one end to the other end. The illustrated blade edge member 25c is inclined at an angle α shown in FIG. 5B in a range of 3 degrees to 15 degrees.

[Moveable cutting blade drive mechanism]
The above-described vertical movement mechanism of the movable cutting blade 25 will be described with reference to FIGS. 2, 3 and 4A. As described above, the pair of drive rotation members 13d and 13f are arranged on the base plate 10 at positions spaced apart along the cutting line CL. As shown in FIG. 4A, a pair of rotary shafts 13x and 13y are supported by the base plate 10 at positions separated by a distance L in the cutting line CL direction. Drive rotation members 13d and 13f such as arm members and eccentric cams are fixed to the pair of left and right rotation shafts 13x and 13y. Each drive rotary member 13 is provided with a transmission pin (may be a cam follower) 13p at a position different from the rotary shafts 13x, 13y, and a movable cutting blade 25 is supported by the transmission pin 13p. Accordingly, when the pair of left and right drive rotation members 13d and 13f are rotated about the rotation shafts 13x and 13y, the movable cutting blade 25 moves up and down while drawing an arc along the base plate 10.

  As shown in FIG. 3, a drive motor M is connected to the rotation shafts 13x and 13y of the drive rotation members 13d and 13f. A sprocket 30 is provided integrally with the rotary shafts 13x and 13y on the back side of the base plate 10, and a transmission chain 29 is bridged between the left and right sprockets 30a and 30b. A drive motor M is connected to the sprocket 30a of the drive rotating member 13d located on the drive side via a reduction gear 31.

  Next, the connection relationship between the drive rotating members 13d and 13f and the movable cutting blade 25 shown in FIG. 5 will be described. As described above, the pair of left and right drive rotation members 13d and 13f are rotated at the same angular velocity in synchronization with the rotation of the drive motor M. As shown in FIG. 5 (a), the pair of left and right drive rotating members 13d and 13f rotate counterclockwise from the home position (standby position) PS shown in the same figure, and cause top dead center P1, press start point P2, and cutting. The rotation starts in the order of the start point P3, the inflection point P4, the cutting end point Pe, and the press end point P6. That is, the pressure plate 21 and the movable cutting blade 25 stand by at a position where the pressure plate 21 and the movable cutting blade 25 are retracted above the paper platform 15, and this position is set as the home position PS. In a state where both of them are waiting at the home position, the sheet bundle is fed to the paper table 15 or unloaded after cutting (this state is shown in FIG. 4B). When the drive rotating member 13 passes through the top dead center P1 and rotates counterclockwise in the figure, the pressure plate 21 and the movable cutting blade 25 gradually move toward the sheet bundle on the paper platform 15 in conjunction with this. Descent. Then, the paper pressure surface 21p of the pressure plate 21 presses the paper surface of the sheet bundle at the press start point P2. FIG. 4B (b) shows a state where the drive rotating member 13 passes through the top dead center P1, and FIG. 4B (c) shows a state where the pressure plate 21 presses the sheet surface of the sheet bundle.

  Next, when the drive rotating member 13 further rotates and reaches the inflection point P4, the pressure plate 21 reliably presses the sheet surface by the action of the pressure spring 18. The cutting start point P3 is reached before and after the inflection point P4 (in the drawing, the rotation angle substantially coincides with the inflection point P4). Since the cutting edge of the movable cutting blade 25 is inclined at an inclination angle α, the sheet bundle on the paper platform 15 is gradually cut from one end to the other end. The state at the start of cutting is shown in FIG. At this time, the pressure plate 21 is separated from the movable cutting blade 25 and remains in a position for pressing the sheet surface. Next, when the drive rotating member 13 reaches the cutting end point Pe on the near side of the bottom dead center P5, the movable cutting blade 25 completely cuts the sheet bundle on the paper table 15 and ends the cutting (this state is shown in FIG. 4C ( e). Next, when the drive rotation member 13 passes through the bottom dead center P5 and reaches the vicinity of the standby position (home position) PS, the pressure plate 21 moves on the paper sheet on the paper table 15 in conjunction with the rising of the movable cutting blade 25. The pressure is released upward from the surface, and the applied pressure is released (this state is shown in FIG. 4C (f)).

  In the illustrated apparatus, the drive-side rotary shaft 13x connected to the drive motor M and the driven-side rotary shaft 13y connected to the rotary shaft 13x by the transmission chain 29 are interlocked so as to form a phase difference θ. It is. That is, the drive rotation member 13f of the driven side rotation shaft 13y is configured to rotate with a delay of the angle θ shown in FIG. 5A with respect to the drive rotation member 13d of the drive side rotation shaft 13x. Due to this phase difference (angle θ), the inclination angle α (shear angle) between the movable cutting blade 25 and the sheet surface is the angle α1 in the standby state in FIG. 5B and the angle in the shear start state in FIG. With α2, the latter angle is large (α1 <α2). Accordingly, it is possible to increase the shear angle for cutting the paper sheet without increasing the vertical stroke of the movable cutting blade 25 (without increasing the size of the apparatus). Then, with the progress of the paper sheet cutting, the angle α3 in the middle of cutting in FIG. 6B and the angle α4 at the end of cutting in FIG. 6C are substantially the same as the angle α1 at the start of cutting. (Α1≈α3≈α4).

  As described above, the drive-side rotary shaft 13x and the driven-side rotary shaft 13y rotate at the same peripheral speed, and the phase difference between the drive-side drive rotary member 13d and the driven-side drive rotary member 13f attached thereto. (An angle θ) is formed. In this relationship, at least one of the driving side and the driven side needs to freely connect the movable cutting blade 25 and the driving rotary member 13 in a direction perpendicular to the vertical cutting direction (if there is no such movement, the two driving rotary members Will buffer each other and their movement will be locked). Therefore, in the illustrated example, the driven rotary member 13f and the movable cutting blade 25 are fitted and supported in a freely movable manner by the long hole 11 (see FIG. 2).

  The above-mentioned movable cutting blade 25 is configured to cut the movable cutting blade 25 while moving in the cutting line CL direction when descending from above to cut the paper sheet P. The moving direction of the movable cutting blade 25 is reversed between the start of cutting and the end of cutting. That is, as shown in FIG. 5B, the movable cutting blade 25 stands by at the illustrated P1 where the driving rotary member 13d on the driving side is located at the top dead center, and the pressure plate 21 at the illustrated P2 rotated counterclockwise by a predetermined angle. Presses the paper surface. Then, cutting is started at P3 in the figure, and cutting is ended at P5 (bottom dead center) in the figure.

  Accordingly, the movable cutting blade 25 that pivots around the rotation shafts 13x and 13y starts cutting the sheet bundle between the top dead center P1 and the inflection point P4 of the arc locus, and exceeds the inflection point P4. The cutting is set to end at the bottom dead center P5. Thus, since the cutting start point of the maximum allowable sheet bundle is set between the top dead center P1 and the inflection point P4, the movable cutting blade 25 moves in the direction of the cutting line CL when descending from the standby position to the cutting position. First, it moves to the left side, and then moves to the right side (after exceeding the inflection point P4). As a result, the cutting edge of the movable cutting blade 25 descends while moving the sheet bundle on the paper platform 15 to the left at the start of cutting, and after exceeding the inflection point P4, the cutting edge descends while moving to the right. A sheet bundle will be cut.

  As described above, the movable cutting blade 25 moves while moving forward (left side in FIG. 4A) while pushing into the paper sheet bundle, so that the cutting depth can be secured even with a soft paper sheet bundle. . At the end of cutting, the movable cutting blade 25 finishes cutting while moving to the right side of FIG. 4A, so that the cutting surface is not disturbed. The cutting of the paper sheet P by the movable cutting blade 25 is easy to cut in the depth direction, for example, when cutting a soft and soft material with a flat blade-shaped knife blade while pushing the blade edge forward at the start of cutting. It is understood from the fact that when the cutting is finished, the cutting surface is adjusted by cutting the blade edge backward.

[Pressure member position holding mechanism]
The drive rotation members 13d and 13f described above are set at positions where the standby position (home position) PS is displaced by a predetermined angle (θ) to the near side of the top dead center P1, as described above with reference to FIG. is there. This is because the urging force of the pressure spring 18 acting on the pressure plate 21 described above acts in the direction opposite to the drive rotation direction (counterclockwise direction). As a result, the pair of left and right drive rotation members 13d and 13f receive the action of the pressure spring 18 in the direction opposite to the drive rotation direction with the drive motor M stopped at the standby position PS. Accordingly, the driving rotary member 13 may rotate clockwise in the drawing by the urging force of the pressure spring 18 at the standby position PS, and the movable cutting blade 25 and the pressure plate 21 may be lowered. Therefore, the illustrated apparatus is provided with a lock means (motion restricting means; the same applies hereinafter) 35 on one of the drive rotating member 13d (drive side) and 13f (driven side).

  The movement restricting means 35 is (1) a rotation locking claw disposed on the drive rotation member 13f, or (2) a one-way rotation clutch disposed on the rotation shaft 13y of the drive rotation member 13f. Or (3) It is comprised with the braking member (brake shoe) arrange | positioned at the said drive rotation member 13f. The movement restricting means 35 shown in FIGS. 4A to 4C is constituted by a locking means arranged on the driven rotation member 13f on the driven side. This locking means 35 is composed of a rotation locking claw 35a that prohibits clockwise rotation (reverse rotation) in FIG. 4A so that the drive rotation member 13 does not move downward from the standby position PS. The position of the rotation locking claw 35a is regulated by a stopper 35c by a return spring 35b, and the rotation of the drive rotation member 13f is allowed in the counterclockwise direction (drive rotation direction), but the rotation in the clockwise direction (counterdrive rotation direction) is allowed. Arranged to ban. As a result, the movable cutting blade 25 and the pressure plate 21 positioned at the standby position PS are prohibited from being lowered in the cutting direction by the urging force of the pressure spring 18.

  In addition, as the movement restricting means, a one-way rotation clutch that allows rotation in the driving direction may be built in the rotating shaft 13y of the driving rotating member 13f, and similarly, a brake shoe may be slidably contacted with the driving rotating member 13f. .

  The operation of the movable cutting blade 25 configured as described above will be described with reference to FIGS. FIG. 5B shows a state where the movable cutting blade 25 is retracted to the upper standby position (cutting standby state). At this time, the drive rotation member 13d located on the drive side is located at the top dead center P1, and the movable cutting blade 25 and the pressure plate 21 are retracted upward from the sheet surface on the paper table 15. In this standby state, the sheet bundle is fed and set on the paper platform 15. Next, when the drive motor M is activated and the drive rotating members 13d and 13f are rotated counterclockwise, the movable cutting blade 25 is gradually moved downward from the top dead center P1, and the pressure plate 21 engaged therewith. Also descends. When the drive rotating member 13d reaches the point P2 in the figure, the lower end surface (paper pressure surface) 21p of the pressure plate 21 presses the paper sheet surface. Next, when the drive rotation members 13d and 13f are further moved to the point P3 in the drawing, the movable cutting blade 25 starts cutting the sheet surface.

  While the drive rotating members 13d and 13f move from the point P3 shown in FIG. 6A to the point P4, the movable cutting blade 25 moves downward while moving to the left side of the drawing, and the blade edge member 25c presses the sheet bundle while moving inside. Enter. Next, when the drive rotating members 13d and 13f exceed the point P4 (inflection point) in FIG. 6B, the movable cutting blade 25 moves deeply into the sheet bundle while moving to the right side of the figure and cuts it. Become. When the movable cutting blade 25 reaches the bottom dead center P5 (the state shown in FIG. 6C), the cutting of the sheet bundle is finished.

[Moveable cutting blade replacement mechanism]
The movable cutting blade 25 configured as described above is supported (mounted) on the base plate (device frame) 10 via the drive rotation members 13d and 13f. At this time, the drive motor M is disposed so as to face the front side of the apparatus. At the same time, the movable cutting blade 25 is arranged so that the blade tip is inclined with respect to the sheet surface on the paper table 15, and this inclination is low on the apparatus front side with respect to the sheet surface and gradually increases on the rear side. Is formed. This is for pulling out the movable cutting blade 25 to the front side of the apparatus. The cutting blade is wide on the front side and narrow on the rear side, so that the replacement is easy and safe. It is.

[Moveable cutting blade replacement mechanism]
The movable cutting blade 25 is inclined at a predetermined angle (α> 0 degrees) in the vertical cutting direction (the Z direction in FIG. 1) so as to gradually cut the paper sheet P on the paper platform 15 from one end to the other end. It is arranged. Therefore, one of the movable cutting blade 25 and the fixed fixed cutting blade 28 is disposed so as to be inclined by a predetermined angle (β) in the cutting line direction with respect to the other so that they intersect each other in the cutting line direction. The movable cutting blade 25 shown in FIG. 11 is disposed at a predetermined angle (β> 0 degrees) with respect to the fixed cutting blade 28 disposed so as to coincide with the cutting line CL. At the same time, the movable cutting blade or the fixed cutting blade is configured to be movable in the paper surface direction of the cut paper sheet orthogonal to the cutting line CL.

  In this manner, at least one of the movable cutting blade 25 and the fixed cutting blade 28 is inclined at a predetermined angle (β) with respect to the cutting line CL, and the cutting edges of the fixed cutting blade 25 and the movable cutting blade 28 are crossed. One of these is configured to be movable in the paper surface direction of the cut sheet. Thus, when the paper sheet P is gradually cut from one end to the other end by the movable cutting blade 25, the movable cutting blade 25 is cut at the cutting point op (see FIG. 11A) for cutting the paper sheet P. The cutting edge of the fixed cutting blade 28 is surely brought into sliding contact (joining).

The relationship between the movable cutting blade 25 and the fixed cutting blade 28 when the paper sheet P is gradually cut from one end to the other end will be described with reference to FIG. When the paper sheet P is gradually cut from the cutting point op1 to op2 by the movable cutting blade 25, the paper sheet P is cut by the cutting length Lx1. At this time, the fixed cutting blade 28 is moved by a distance Ly1 in the paper surface direction. This distance Ly1 is calculated by Equation 1 (Ly1 = Lx1 × tan β) and Equation 2 (Ly2 = Lx2 × tan β). That is, when the paper sheet P is gradually cut from one end Pa toward the other end Pz, the fixed cutting blade 28 is moved by Ly1 and Ly2 shown in FIG. The amount calculated in 2. Then, the paper sheet P on the paper table 15 is cut linearly along the cutting line CL.
Although FIG. 11 shows the case where the fixed cutting blade 28 is moved in the paper direction along with the movement of the cutting point op, the movable cutting blade 25 may be moved in the paper direction. In this case, the movable cutting blade 25 is moved in the direction opposite to that shown in the figure.

  Next, a configuration in which the movable cutting blade 25 or the fixed cutting blade 28 is moved in the paper surface direction of the paper sheet P will be described. FIG. 12 shows a case where the fixed cutting blade 28 is moved. As described with reference to FIGS. 7 and 8, the fixed cutting blade 28 is integrally attached to the paper platform 15 (hereinafter, both are collectively referred to as “paper platform unit 15U”). This paper mounting unit 15U is attached to a base plate (apparatus frame) 10 so as to be movable in the paper surface direction (Y direction shown in FIG. 1) of the cut paper sheet. A biasing means (compression spring) 16 that biases the paper platform unit 15U toward the movable cutting blade 25 is provided between the base plate 10 and the paper platform unit 15U, and the fixed cutting blade 28 is moved to the movable cutting blade. It is repressed so as to be in sliding contact with 25.

  Accordingly, when the paper sheet P is gradually cut from the one end Pa to the other end Pz of the paper sheet along the cutting line CL by the above-described movable cutting blade 25, the above-described paper placement is performed along with the movement of the cutting point op. A configuration for moving the base unit 15U forward or backward in the paper surface direction will be described. FIG. 12 shows a case where the paper mount unit 15U is translated by the cam means (tilted cam surface) 151. FIG. 13 shows a case where the paper platform unit 15U is translated by the guide groove 152. FIG. 14 shows a case where the paper platform unit 15U is rotated by the cam means 153. The configuration will be described sequentially.

  11 and 12 is supported by the cutting opening 12 of the base plate 10 so as to be movable in the sheet surface direction as described above. The paper mount unit 15U is integrally provided with the pair of left and right guide members 17R and 17L described above, and a biasing means 16 composed of a compression spring is provided between the guide members 17R and 17L and the base plate 10. Yes. By this urging means 16, the paper platform unit 15U is always urged toward the movable cutting blade 25 side. Therefore, an inclined cam surface 151 is provided between the paper mounting unit 15U and the movable cutting blade 25 so that the paper sheet P placed on the paper mounting unit 15U moves in parallel. The inclined cam surface 151 is disposed on the cutting start position side (the left end in FIG. 2) of the movable cutting blade 25 and is disposed so as to be in sliding contact with the lower end portion 25z of the blade holder 25h of the movable cutting blade 25.

  As shown in FIG. 2, the inclined cam surface 151 is provided on the left guide member 17L so as to be in sliding contact with the lower end portion 25z of the receiving blade holder 25h, and is not provided on the right guide member 17R. In this way, the movable cutting blade 25 inclined at a predetermined angle (α) in the cutting direction is inclined so that the left side in FIG. 2 is low and the right side is high, and the inclined cam surface 151 is disposed on the left guide member 17L located on the left side. It is. Therefore, as shown in FIG. 11 (a), the sheet mounting unit 15U is positioned at Cy1 in the case of the cutting point op1, the inclined cam surface 151 so as to be positioned in Cy2 at the cutting point op2, and Cy3 at the cutting point op3. Is formed.

  Accordingly, the paper sheet P set on the paper platform 15 moves backward together with the paper platform unit 15U. As described above, the inclined cam surface 151 moves the position of the paper platform unit 15U in conjunction with the movement of the cutting point op along the cutting line CL. In this case, the pressure plate 21 acting on the paper platform unit 15U and the paper sheet P is also moved by the same amount in the direction of the paper surface, and the movement is loose (clearance) between the pressure spring 18 and the pressure spring 18. ). That is, as shown in FIG. 11, a gap Ga is formed between the base plate 10 and the paper platform unit 15U, and this gap Ga is formed in Ga1 at the initial stage of cutting the sheet (the state in FIG. 11A). At the end of the cutting of the paper sheet (the state shown in FIG. 5B), Ga2 is formed, and this gap is set to Ga1> Ga2.

  Next, a configuration for moving the paper platform unit 15U shown in FIG. 13 forward or backward in the paper surface direction will be described. The paper mount unit 15U shown in the figure adopts a configuration in which it moves in parallel by a guide groove 152 formed in the apparatus frame (the aforementioned base plate) 10. The base plate 10 is formed with a guide groove 152 for fitting and supporting the paper platform unit 15U, and the guide groove 152 is arranged in the same direction as the paper sheet surface. A slide roller 152 a is fitted in the guide groove 152, and the slide roller 152 a is fixed to the bottom wall of the paper mount 15.

  Accordingly, the paper platform unit 15U is supported so as to be movable in a parallel posture along the guide groove 152. Further, the pressure plate 21 is moved in the paper surface direction (Y direction) while being fitted to the guide members 17R and 17L of the paper platform unit 15U. At this time, the aforementioned pressure spring 18 disposed between the pressure plate 21 and the base plate 10 is configured to swing following the movement of the pressure plate 21.

  Next, a configuration for moving the paper platform unit 15U shown in FIG. 14 forward or backward in the paper surface direction will be described. The paper table unit 15U shown in the figure is rotatably supported by the apparatus frame (the above-described base plate) 10 and follows the movement of the cutting point op from the one end Pa to the other end Pz of the paper sheet by the movable cutting blade 25. The structure which rotates is adopted. The paper mounting unit 15U shown in the figure is configured to rotate on a support shaft 153 to an apparatus frame (the base plate) 10 described above. The paper table 15 is provided with an inclined cam surface 155, and is configured to engage with the holder 25h of the movable cutting blade 25 so that the paper table unit 15U rotates around the support shaft 153 as shown in the figure. It is. Therefore, when the paper sheet P on the paper platform 15 is cut while moving from one end Pa to the other end Pz with the movable cutting blade 25 configured in the same manner as described above, the cutting point op is followed. The paper table 15 rotates about the support shaft 153. As a result, the paper sheet P is cut linearly along a predetermined cutting line.

  In the present invention, when one of the movable cutting blade 25 and the fixed cutting blade 28 is inclined with respect to the other by a predetermined angle (β) so as to cross each other, the fixed cutting blade 28 matches the cutting line CL. A case has been described in which the movable cutting blade 25 is inclined at an angle (β). As a different method, the present invention may be configured such that the movable cutting blade 25 is arranged so as to coincide with the cutting line CL and the fixed cutting blade 28 is inclined at an angle (β).

  Further, in the present invention, the fixed cutting blade 28 and the movable cutting blade 25 are each formed in a flat plate shape in which the cutting edge draws a straight line, but one of the fixed cutting blade and the movable cutting blade is curved with a predetermined curvature. It may be formed to be curved.

[Different configurations of movable cutting blades]
In addition, in this invention, it is also possible to comprise a movable cutting blade as follows. The above-described movable cutting blade 25 shown in FIG. 2 shows a case where the movable cutting blade 25 descends while swinging with a pair of left and right drive rotating members 13d and 13f. It may be configured to move up and down vertically. The same components as those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted, but the apparatus of FIG. It is supported to move up and down in the direction. The pair of left and right drive rotating members 13d and 13f have the transmission pin 13p fitted in the long hole bearings 14R and 14L, respectively. Therefore, the movable cutting blade 25 moves up and down only in the vertical direction by the drive rotating members 13d and 13f that move in a circular arc with this bearing structure. Other configurations are the same as those in FIG.

[Configuration of Image Forming Apparatus]
Next, the configuration of the post-processing apparatus and the image forming apparatus provided with the above-described sheet bundle cutting apparatus A will be described with reference to FIG. As the image forming apparatus B, various structures such as a copying machine, a printer, and a printing machine can be adopted, and an electrostatic printing apparatus is illustrated. In the image forming apparatus B, a paper feed unit 52, a printing unit 53, a paper discharge unit 54, and a control unit are built in a casing 51. A plurality of cassettes 52 a corresponding to the sheet size are prepared in the sheet feeding unit 52, and a sheet having a size designated by the control unit is fed out to the sheet feeding path 55. The sheet feeding path 55 is provided with a registration roller 55a, and after feeding the sheet to the leading edge, feeds the sheet to the downstream printing unit 53 at a predetermined timing.

  The printing unit 53 is provided with an electrostatic drum 53a. Around the electrostatic drum 53a, a print head 53b, a developing device 53c, a transfer charger 53d, and the like are arranged. The print head 53b is composed of, for example, a laser light emitter, and forms an electrostatic latent image on the electrostatic drum 53a. A toner ink is attached to the latent image by the developing device 53c, and printing is performed on the sheet by the transfer charger 53d. . This print sheet is fixed by the fixing device 56 and carried out to the paper discharge path 54b. A paper discharge port 58 and a paper discharge roller 59 formed in the casing 51 are disposed in the paper discharge unit 54. The print sheet on which the image is formed in this manner is carried out from the paper discharge port 58 by the paper discharge roller 59.

  A scanner unit 45 shown in the figure optically reads a document image to be printed by the print head 53b. As is generally known, the platen 46 on which an original sheet is placed and set, a carriage 47 that scans an original image along the platen 46, and an optical device that photoelectrically converts an optical image from the carriage 47. A reading means (for example, a CCD device) 48 is included. In the illustrated example, a document feeder 49 for automatically feeding a document sheet to the platen 46 is provided on the platen 46.

[Configuration of bookbinding device (sheet handling device)]
Next, the bookbinding apparatus C is connected to the downstream side of the image forming apparatus B described above, and the sheets on which the images have been formed are aligned in a bundle shape, and the sheet bundle aligned in the bundle shape is stapled, adhesive tape, and adhesive. Binding is done with glue, and the bookbinding process is performed. The sheet bundle after the bookbinding process is cut and aligned by the aforementioned sheet bundle cutting apparatus A and stored in the paper discharge stacker. The bookbinding apparatus C shown in FIG. 16 staples and binds the center of the bundle of paper sheets arranged in a bundle, and folds the saddle-stitched paper bundle into a booklet, and then cuts the folded leading end. The apparatus to align is shown.

  Therefore, a carry-in route 61 that is continuous with the paper discharge port 58 of the image forming apparatus B is provided, and the stacking tray 62 is disposed on the downstream side of the route paper discharge port 61 a of the carry-in route 61. The tray is provided with a switchback roller 62a for transferring the sheet back and forth in the paper discharge direction and a rear end regulating member 62b for regulating the rear end of the sheet. The switchback roller 62a conveys the sheet from the path sheet discharge outlet 61a to the front end side of the tray in the sheet discharge direction, and after the sheet rear end enters the tray, the sheet is transferred in the direction opposite to the sheet discharge direction. Abutting the end regulating member 62b for positioning. The rear end regulating member 62b is swingable between a position protruding from the tray and a position retracted from the tray, and is connected to a shift means (not shown) such as an electromagnetic solenoid. The accumulation tray 62 is provided with a rear end pushing member 63 for carrying the accumulated sheet bundle to the downstream side. A side alignment member (not shown) is arranged on the stacking tray 62 so as to position and align the conveyance orthogonal direction of the sheet entering from the path discharge port 61a. Accordingly, the sheets from the path discharge port 61a are carried onto the tray, and are stacked in a bundle shape with the trailing end of the sheet being regulated by the trailing end regulating member 62b. Thereafter, the sheet bundle is carried out downstream by the rear end pushing member 63 in a state where the rear end regulating member 62b is retracted from the stacking tray 62.

  A bookbinding path 64 is provided downstream from the stacking tray 62, and a saddle stitch stapler 65 is disposed in the bookbinding path 64. Although the structure of the saddle stitch stapler 65 is not described in detail, it is composed of a unit that inserts a staple into the sheet bundle and bends the leading end, and an upper unit that inserts the staple and a lower unit that bends the leading end transfers the sheet bundle. The bookbinding path 64 is arranged vertically. The bookbinding path 64 is provided with a first stopper 64a and a second stopper 64b for locking the leading end of the sheet bundle. The first stopper 64a is configured by a movable member that can freely move in and out of the bookbinding path 64, and is arranged so that the saddle stitching stapler 65 is positioned at the center of the sheet bundle in a state where the leading end of the sheet bundle is locked. Accordingly, the sheet bundle accumulated on the accumulation tray 62 is transferred to the bookbinding path 64 by the rear end pushing member 63, and is bound by the saddle stitching stapler 65 with the front end locked by the first stopper 64a.

  After the first stopper 64a is retracted from the bookbinding path 64, the sheet bundle that has been saddle stitched and bound as described above is engaged with the second stopper 64b on the downstream side. In this state, a folding roll 66a and a middle folding knife 66b are arranged so as to bend the center (staple binding position) of the sheet bundle. The middle folding knife 66b is composed of a blade that can move up and down in the direction of the arrow, and guides the sheet bundle in the bookbinding path to the folding roll 66a. The folding roll 66a is composed of a pair of rolls, and is bent at the center of the sheet bundle and transported to the paper discharge path 67 on the downstream side.

  A paper discharge path 67 disposed on the downstream side of the folding roll 66 a is configured as a switchback path, and guides the sheet to the cutting path 68. In the figure, 67a is a switchback roller, and 67b is an intermediate tray. The cutting device A is arranged in the cutting path 68 configured as described above. The cutting apparatus A is the apparatus described with reference to FIG. 1, and the operation thereof will be described later. The cutting path 68 is provided with a belt conveying means 69 for transferring the sheet bundle and a grip rotating means 70.

  In the above configuration, the sheets on which the image is formed by the image forming apparatus B are stacked and aligned on the stacking tray 62 in a bundle. Therefore, when a control CPU (not shown) provided in the bookbinding apparatus C receives a job end signal from the image forming apparatus B, the trailing edge regulating member 62b is retracted out of the tray, and the trailing edge pushing member 63 moves the sheet bundle downstream. To the bookbinding path 64. Then, the leading end of the sheet bundle is brought into contact with the first stopper 64a in the bookbinding path and stopped. In this state, the saddle stitching stapler 65 is operated to staple the center (center folding position) of the sheet bundle. Next, the control CPU retracts the first stopper 64a out of the path and stops the sheet bundle by abutting against the second stopper 64b further downstream. Then, the center of the sheet bundle (the staple binding position) faces the folding roll 66a, and in this state, the middle folding knife 66b is moved in the direction of the arrow shown. Then, the sheet bundle is guided to the folding roll 66a while being bent at the center. Therefore, when the folding roll 66a is rotationally driven, the sheet bundle is bent at the center and transferred to the paper discharge path 67 on the downstream side.

  In this way, the sheet bundle guided to the paper discharge path 67 is sent to the cutting path 68 with the conveying direction reversed. In the cutting path 68, the sheet bundle is switched back by the belt conveying means 69 to position the leading end. In this leading edge positioning, the sheet bundle is conveyed to the right side in FIG. 8 with the movable cutting blade 25 retracted to the standby position, and the entire sheet bundle enters the cutting path 68. Accordingly, the sheet bundle is returned to the left side of the figure by the belt conveying means 69 and the sheet bundle is positioned so that the predetermined cutting line CL coincides with the position of the cutting blade. Next, the control CPU nips the sheet bundle by the grip rotating means 70 and then presses and holds the sheet bundle by the pressing means 20. Therefore, the movable cutting blade 25 is moved in a predetermined direction. In this cutting state, the edge of the sheet bundle is cut by the procedure described above with reference to FIGS.

  Next, after cutting the small edge portion of the sheet bundle, the control CPU releases the pressing means 20 and operates the grip rotating means 70 to rotate the sheet bundle, for example, 90 degrees so that the top portion faces the cutting position. After the sheet bundle is rotated, the sheet bundle is fed to the cutting line CL by a predetermined amount. The sheet bundle is transferred by moving the grip rotating means 70 to the right side in the drawing or by the belt conveying means 69. Thereafter, the top of the sheet bundle is cut, and the fore edge is cut similarly. When the cutting of the sheet bundle in the three directions is completed, the control CPU carries out the sheet bundle to the sheet discharge stacker 71 by the belt conveying means 69.

  The illustrated bookbinding apparatus C shows a case where booklet binding is performed by the saddle stitch stapler 65. However, in this case, an adhesive is applied to the end surface of the bundle of sheets stacked in a bundle, and the case binding is performed with a cover sheet (case binding). Of course, it is also possible to bind the top paste without covering with a cover sheet.

The perspective view which shows the whole structure of the paper sheet bundle cutting device concerning this invention. Explanatory drawing which shows the front structure of the apparatus of FIG. Explanatory drawing which shows the back surface structure of the apparatus of FIG. Explanatory drawing which shows the structure of the cutting edge press means in the apparatus of FIG. It is operation | movement state explanatory drawing of a press means and a movable cutting blade, (a) shows a state in a standby position, (b) shows the state in a top dead center, (c) is a press state figure. It is operation | movement state explanatory drawing of a press means and a movable cutting blade, (d) shows a cutting start point, (e) shows a cutting end point, (f) shows a press release point. It is explanatory drawing of the operation state of the drive rotation member in the apparatus of FIG. 1, (a) is explanatory drawing of a movement locus | trajectory, (b) is a state figure of a cutting blade in a standby position (top dead center). It is explanatory drawing of the cutting state of the paper sheet bundle in the apparatus of FIG. 1, (a) shows the initial state which cuts a paper sheet with a cutting blade, (b) shows the state in the middle of cutting a paper sheet with a cutting blade. (C) shows the state in which the cutting of the paper sheet is finished with the cutting blade. Explanatory drawing of the longitudinal cross-section in the apparatus of FIG. FIG. 2 is an exploded assembly explanatory view showing a positioning structure of a fixed cutting blade and a movable cutting blade in the apparatus of FIG. 1. FIGS. 9A and 9B are explanatory views of a positioning state of the fixed cutting blade and the movable cutting blade in the configuration of FIG. 8, where FIG. The state which pressed is shown. Structure explanatory drawing of the cutting edge press means in the apparatus of FIG. The structure of the paper platform unit in the apparatus of FIG. 1 is shown, (a) is explanatory drawing which shows the movement of a paper platform when cut | disconnecting gradually from one end of a paper sheet to the other end, (b) is a cutting | disconnection point. The state of shifting the paper platform at OP1, (c) shows the state of shifting the paper platform at the cutting point OP2, and (d) shows the state of shifting the paper platform at the cutting point OP3. 12A and 12B are explanatory views showing a cross-sectional configuration of the paper mounting unit in the apparatus of FIG. 11, in which FIG. 11A shows a cross-sectional state at the initial stage of cutting, and FIG. Explanatory drawing which shows the form different from FIG. 11 of the paper mounting unit in the apparatus of FIG. FIG. 13 is an explanatory view showing a form different from that of FIGS. 11 and 12 of the paper platform in the apparatus of FIG. 1, (a) shows a planar configuration of the paper platform unit, and (b) shows a cross-sectional configuration of the paper platform unit. . Explanatory drawing which shows the structure of the cutting apparatus different from the apparatus of FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration explanatory diagram of a finisher device incorporating a paper sheet cutting device according to the present invention.

Explanation of symbols

A Paper sheet bundle cutting device (trimmer unit)
M drive motor CL cutting line 10 device frame (base plate)
10r bent piece 11 long hole 12 cutting opening 13d drive rotation member (drive side)
13f Drive rotating member (driven side)
13s Bearing sleeve 15 Paper mount (paper mount assembly)
16 Energizing means 17R Guide member 17L Guide member 17g Guide groove 18 Pressing spring 19 Pressing member 20 Pressing means 21 Pressing plate 21k Engagement piece 21p Lower end surface (paper pressure surface)
25 Movable cutting blade 25q Lubricating paint 25w Concave groove 25x Upper edge 25z Lower end 28 Fixed cutting blade 29 Transmission chain 30 Sprocket (30a, 30b)
35 Locking means (movement regulation means)
35a Rotation locking claw 35b Return spring 35c Stopper 45 Scanner unit 49 Document feeder 62 Stack tray 71 Paper discharge stacker 151 Inclined cam surface 152 Guide groove 152a Guide roller 153 Bearing pin

Claims (8)

A paper platform on which the sheet bundle is placed;
A movable cutting blade for cutting the sheet bundle on the paper table along a predetermined cutting line;
An apparatus frame that supports the movable cutting blade so as to be movable up and down;
Drive means for moving the movable cutting blade up and down between a cutting position for cutting the sheet on the paper table and a standby position spaced above the sheet;
A pressure member that presses the sheet bundle on the paper table in conjunction with the vertical movement of the movable cutting blade;
With
The pressure member and the movable cutting blade are:
The pressure member is urged in a downward direction to constantly press the sheet bundle on the paper platform by a pressure spring supported at one end by the apparatus frame ,
The movable cutting blade is moved upward in a direction away from the sheet bundle against the pressure spring by the operation of moving from the cutting position to the standby position by the driving means.
Interlocked with
The drive means is
At least one drive rotating member disposed on the device frame and connected to move the movable cutting blade up and down;
A drive motor that causes rotational motion in the drive rotating member;
Drive control means for controlling the drive motor;
Consists of
The drive control means includes
The movable cutting blade is configured to stop and wait for the drive motor at a standby position spaced upward from a sheet bundle on the paper platform,
Between the drive motor and the movable cutting blade,
A paper sheet cutting apparatus comprising: a movement regulating means for preventing the movable cutting blade positioned at the standby position from moving downward by a spring force against the pressure spring . The movement regulating means is
Or rotational locking claw disposed on the driving rotary member,
Or one-way rotation clutch which is arranged in the drive rotary member,
Or a braking member disposed on the drive rotating member ,
The paper sheet cutting apparatus according to claim 1, wherein the paper sheet cutting apparatus is configured. The device frame is
A base plate disposed in a direction substantially orthogonal to the sheet surface on the paper table;
A holding member disposed opposite to the base plate at a predetermined interval;
With
The pressurizing member and the movable cutting blade are supported between the base plate and the pressing member so as to be movable in a direction perpendicular to the sheet surface on the paper table. Item 2. A sheet cutting apparatus according to item 1. 2. The paper sheet cutting according to claim 1, wherein the drive rotation member includes a rotation shaft disposed in the apparatus frame and an arm member or an eccentric cam member connected to the rotation shaft. apparatus. The movable cutting blade is connected to the drive rotary member and is configured to move up and down between the top dead center and the bottom dead center of the drive rotary member,
The pressurizing member is configured to move up and down in conjunction with the up and down movement of the movable cutting blade,
The standby position of the pressure member is set at a position displaced by a predetermined angle from the top dead center of the drive rotation member to the front side in the rotation direction,
2. The paper sheet cutting apparatus according to claim 1, wherein the movement restricting member is arranged to prevent reverse rotation of the drive rotating member at the standby position. When the drive control unit controls the drive motor,
The drive rotary member is temporarily stopped at a standby position where the drive rotary member is displaced by a predetermined angle from the top dead center toward the rotation direction, and the movable cutting blade and the pressurizing member are waited above the paper platform. Let
After the sheet bundle is set on the paper platform,
The driving rotary member is rotated from top dead center to bottom dead center, the pressure member presses and supports the sheet bundle on the paper platform, and then the movable cutting blade is configured to cut the sheet bundle. The paper sheet cutting apparatus according to claim 5, wherein The movable cutting blade includes a cutting edge inclined at a predetermined angle in the vertical cutting direction so as to gradually cut the sheet bundle on the paper platform from one end toward the other end,
The paper table is provided with a flat plate-shaped fixed cutting blade that is in sliding contact with the movable cutting blade, and is configured to be movable in the paper surface direction perpendicular to the cutting line.
The movable cutting blade and the cutting edge of the fixed cutting blade are disposed opposite each other with a predetermined angle with respect to the other so that they intersect each other in the cutting line direction,
2. The paper sheet cutting apparatus according to claim 1, wherein the fixed cutting blade is moved in the paper surface direction perpendicular to the cutting line by the lowering operation of the movable cutting blade. 8. The paper sheet cutting apparatus according to claim 7, wherein the paper table or the fixed cutting blade is provided with an urging means that elastically presses the fixed cutting blade against the movable cutting blade.

Images