JP2014213407A - Cutting blade unit and paper sheet cutting device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet bundle cutting device in which a cutting blade can be exchanged easily and safely when cutting a sheet bundle with the cutting blade, and, therefore, downsizing, muffling and electric power consumption saving can be realized.SOLUTION: In a paper sheet cutting device, a blade tip holder is attached as detachable to a running carriage which moves from one end to the other end along a sheet bundle, and a blade having a knife edge and a cover member which opens and closes the knife edge are provided at the blade tip holder. The cover member performs opening operation from a cover closing state of covering the knife edge to a cover opening state of exposing the knife edge through operation of attaching the blade tip holder, and performs closing operation from the cover opening state of the knife edge to the cover closing state through operation of detaching the blade tip holder.

Description

  The present invention relates to a sheet bundle cutting device that cuts a sheet bundle with a cutting blade that travels along a predetermined cutting line, and a cutting blade that can be safely attached to and detached from the cutting blade unit related to the cutting blade unit used therefor It relates to the improvement of the safety mechanism.

  In general, this type of sheet bundle cutting device is configured to cut a sheet bundle placed on a paper table with a flat plate-shaped guillotine blade (guillotine cutting mechanism) and a sheet bundle while rotating a disk-shaped rotary blade. A cutting mechanism (disk cutting mechanism) that gradually cuts from one end of the sheet to the other end, and a traveling blade cutting mechanism that cuts by cutting a flat sheet cutter from one end to the other end of the sheet bundle are known. Yes.

  As the above-described traveling blade cutting mechanism, for example, Patent Document 1 discloses a device that cuts a single plate material by moving it from one end to the other end with a flat plate-shaped blade edge. Although the document does not disclose a mechanism for cutting a large number of sheets stacked like a sheet bundle, the sheet bundle is gradually cut from one end to the other by pressing and holding the sheet bundle with a press mechanism. A guillotine cutting mechanism having an inclined cutting edge is also known from Patent Document 2 and the like.

  Further, Patent Document 3 proposes an apparatus for cutting by moving a disk-shaped cutter from one end to the other end of a sheet bundle while rotating the disc-shaped cutter. This document discloses an apparatus for cutting a sheet bundle by running a rotary blade that rotates a sheet bundle placed on a paper platform at a high speed from one end to the other end.

Japanese Examined Patent Publication No. 04-4117 (FIG. 4) Japanese Patent No. 5063144 (FIG. 1) JP 2008-142816 A

  As described above, the conventional sheet cutting apparatus cuts a sheet bundle with a disk-shaped cutter, a guillotine-shaped cutter, or a plate-shaped cutter. It is also known that the sheet bundle is a cut product with severe blade edge wear due to recycled paper and other additives.

  Therefore, the conventional cutting position cutter is made of a material that is strong and durable, and therefore the cutting edge thickness is made of a considerably thick material. The paper sheet is cut instantaneously by operating to the cutting position. Therefore, it is known that the cutting blade is large and heavy, and the drive mechanism for driving it has a large capacity.

  On the other hand, it is well known that razor swords for shaving are thin and can be cut with a light force. However, there is a problem with durability in proportion to the thin blade edge, and the blade edge should be frequently replaced with a holder. Is also known.

  The inventor of the present invention has an idea that the apparatus can be reduced in size, silence, and power consumption by cutting a sheet bundle while moving it gently from one end to the other with a thin blade-shaped cutting blade. It came. Therefore, it has been necessary to make it possible to easily replace the cutting blades by a skilled worker such as a serviceman without requiring special knowledge.

  In the present invention, when cutting a sheet bundle with a cutting blade that travels from one end to the other, the cutting blade can be easily exchanged and can be safely performed, thereby reducing the size and noise of the sheet cutting device. An object of the present invention is to provide a sheet bundle cutting apparatus that can reduce power consumption.

  In order to solve the above-mentioned problems, the present invention provides a blade holder that is detachably attached to a traveling carriage that moves from one end to the other along a sheet bundle, and a blade that has a knife edge on the blade edge holder, and a cover that opens and closes the knife edge. The cover member is opened from the closed state that covers the knife edge to the open state when the blade edge holder is attached, and the knife edge is changed from the open state to the closed state by removing the blade edge holder. It is characterized by a closing operation.

  More specifically, the configuration is a device that cuts paper sheets with a cutting blade that is detachably attached to a traveling carriage that reciprocates along a cutting line. The device frame and the device frame reciprocate with a predetermined stroke. A traveling carriage that is detachably attached, a cutting blade that is detachably attached to the traveling carriage, and a drive unit that reciprocates the traveling carriage.

  The cutting blade holds a blade edge blade having a knife edge formed in a cutting depth direction, a cover member that opens and closes in a closed state that covers the knife edge and an open cover state that exposes the blade, and the blade edge blade and the cover member And a cutting edge holder.

  The blade holder is detachably attached to a holder mounting portion provided on the traveling carriage, and the blade member is moved from the closed posture to the open posture by the operation of attaching the blade holder. The cover member is configured to open and close from the open position to the closed position.

  The present invention opens the cover member that covers the knife edge of the blade by the operation of attaching the blade holder to the traveling carriage, and closes the cover member to cover the knife edge by the operation of removing from the carriage. Play.

  The blade having the knife edge is attached to the blade edge holder, and the knife edge is covered with the cover member until it is attached to the traveling carriage of the cutting device, so that it is easy to handle and safe.

The cover member that covers the knife edge by the operation of attaching the blade holder to the traveling carriage is opened to expose the cover member, so that the knife edge does not require any special operation after being attached to the traveling carriage. Exposed to cut the bundle.
Therefore, it is easy to replace the cutting blade, and no special skill is required.

  In the present invention, the cutting blade can be safely and easily replaced with the traveling carriage in this way, so that the cutting edge of the cutting blade can be formed thin without requiring durability, thereby reducing cutting resistance. In addition, the drive mechanism can be reduced in size, silence, and power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective explanatory view of the entire apparatus, which is an embodiment of a sheet cutting apparatus according to the present invention. Fig. 2 shows an exploded perspective view of the device of Fig. 1; FIG. 2 is an explanatory diagram of a planar configuration of the apparatus of FIG. 1, showing a state in which a sheet pressing member waits upward in a state where a sheet bundle is set on a paper mount and a traveling carriage is positioned at an initial movement position. FIGS. 2A and 2B are explanatory diagrams of a paper pressing mechanism that presses and holds a sheet bundle in the apparatus of FIG. 1, in which FIG. 1A shows an operating state in which the paper pressing member presses the sheet bundle, and FIG. The standby state retracted upward is shown. FIG. 2 is a configuration explanatory view of a vertical cross section of the apparatus in FIG. FIG. 6 is an enlarged explanatory view of a main part in FIG. 5 showing a configuration of the apparatus longitudinal section, and shows a cutting operation for setting the sheet on a paper table and cutting a sheet bundle with a cutting blade. FIG. 2 is an explanatory diagram illustrating a state in which a cutting blade mounted on a traveling carriage cuts a sheet bundle in the apparatus of FIG. 1, and illustrates a state in which the traveling carriage travels in the direction indicated by an arrow. FIG. 7 shows the traveling carriage in the sheet bundle cutting state of FIG. 7, (a) shows a front view of the cutting blade, and (b) shows a rear view of the cutting blade. FIG. 8 is a main part explanatory view showing a side configuration of the cutting blade in the sheet bundle cutting state of FIG. 7. It is a conceptual diagram explaining the effect | action of the cutting blade in explanatory drawing of FIG. 9, (a) shows sectional explanatory drawing of a cutting blade unit, (b) is a block diagram of a cutting blade. The perspective explanatory view of the state where the cutting blade unit is attached to the traveling carriage. The cutting blade unit and the traveling carriage mounting / detaching configuration are shown, (a) is a side configuration of the traveling carriage, (b) is a side configuration of the blade holder, (c) is a front configuration of the blade holder, and (d) is ( The state of the xx cross section of c) is shown. It is explanatory drawing about the form which opens and closes a cutting blade by attachment / detachment operation of a blade-tip holder, (a) shows the closed state of an opening-and-closing cover, (b) shows an open state. 12 shows a blade edge cover member different from FIG. 12, (a) shows a state where the cover member covers the blade edge, (b) shows a state where the blade edge is exposed, and (c) shows an xx cross section of (b). Indicates the state. 2A and 2B are explanatory diagrams of speed control of a traveling carriage in the apparatus of FIG. 1, (a) shows the relationship between the cam surface and the stroke of the traveling carriage, (b) shows the speed control, and (c) shows the pressure state. (D) shows the spring mechanism in a standby state. FIG. 2 is an explanatory diagram of a post-processing apparatus in an image forming system in which the apparatus of FIG. FIG. 3 is an explanatory diagram of a sheet conveying mechanism different from the apparatus of FIG. 1. The structure explanatory drawing of the lower blade different from the apparatus of FIG. It is explanatory drawing which shows the state of the cut surface in the conventional cutting device, and shows the cut surface shape in the cutting device which is not equipped with the backup mechanism in the blade edge | tip of a cutting blade. It is explanatory drawing which shows the state of the cut surface in the conventional cutting device, and shows a cut surface shape.

  The present invention relates to a sheet cutting apparatus that cuts a sheet bundle S in which a plurality of paper sheets are stacked along a predetermined cutting line. FIG. 1 is an explanatory diagram of the overall configuration showing one embodiment, and FIG. 2 is an exploded perspective view thereof.

  As shown in FIG. 1, a sheet cutting apparatus A includes an apparatus frame 1, a paper platform 2 on which a sheet bundle S is placed, a paper pressing member 13 that presses and holds the sheet bundle S on the paper platform, and an apparatus. A traveling carriage 4 is attached to the frame 1 so as to be able to reciprocate at a predetermined stroke (traveling stroke) St, and a cutting blade unit 3 is attached to the traveling carriage.

[Device frame]
In the apparatus frame 1, an opening 12 (paper loading area; the same applies hereinafter) for setting the sheet bundle S is formed, and a paper platform 2 for mounting (setting) the sheet bundle S is formed in the opening 12. (The one shown in the figure is bent). A traveling carriage 4 equipped with a cutting blade unit 3 on a sub-frame 1b described later is attached to the main frame 1a so as to reciprocate with a predetermined stroke St.

  Referring to the exploded view shown in FIG. 2, 1a is a main frame, 1b is a sub-frame, 1c is a unit frame of a press mechanism (hereinafter referred to as “press frame”), and 1d is a seat guide mechanism. A unit frame (hereinafter referred to as “guide frame”).

  The base frame 1a is made of a material having an appropriate strength such as metal or resin, and has an opening (paper placement area) 12 for setting the sheet bundle S to be cut. A paper platform 2 on which the lower surface of the sheet bundle S is placed is disposed in the opening 12. A sub frame 1b, a press frame 1c, and a guide frame 1d are fixed to the base frame 1a to constitute an apparatus frame 1.

  The subframe 1b incorporates travel guide means (upper guide rail) 11 and travel drive means (drive motor M1 and timing belt 48) that support a travel carriage 4 to be described later so as to reciprocate. The upper guide rail 11 is composed of a first guide rail 11a and a second guide rail 11b arranged in parallel to each other so that the traveling carriage 4 is fitted and guided so as to be reciprocally movable at a predetermined stroke St. Yes.

  The illustrated first and second guide rails 11a and 11b are constituted by guide rods (guide shafts) having a circular cross section, but may be rectangular guide rails or the first and second ones may be The guide rod and the other may be a rectangular rail. The sub frame 1b is fixed to the main frame 1a with screws or the like and integrated. Therefore, the apparatus frame 1 may be configured integrally with the main frame 1a and the subframe 1b without being separated. In the apparatus of FIG. 1, the apparatus frame 1 is configured by a single frame having an opening (paper loading area) 12, but the apparatus frame 1 includes an upper frame frame that is divided vertically through the paper loading area 12. It is good also as a structure isolate | separated by the lower frame frame.

  The press frame 1c is configured by a frame structure having a paper pressing member 13 that presses the sheet bundle S against the paper platform 2, and is configured by a fixed frame 15 and a movable frame 16. The fixed frame 15 is integrally attached to the main frame 1a. The movable frame 16 has a link structure that moves up and down between an operating position (FIG. 4A) that presses against the paper platform 2 of the main frame and a retracted standby position (FIG. 4B). Has been. The link mechanism will be described later with reference to FIG.

  In the press frame 1c, a paper pressing member 13 is provided on the movable frame 16, and the paper pressing member 13 presses (presses) the upper surface of the sheet bundle with the pressing surface 13a facing the paper loading surface 2. It has become. The illustrated paper pressing member 13 is integrally formed with the movable frame 16 by bending. The press frame 1c is provided with a pressure spring 14 between the fixed frame 15 and the movable frame 16 for urging the movable frame 16 toward the paper mounting surface 2a. At the same time, the movable frame 16 is provided with a cam member 19 that stands by at a raised position separated from the paper mounting surface against the spring force of the pressure spring 14.

  The guide frame 1d is provided with guide flappers (sheet guides) 23a and 23b for guiding the sheet bundle S to the paper mounting surface 2a of the base frame 1a, and a flapper motor M2 for opening and closing the guide flapper. The detailed structure will be described later.

[Paper mount]
As described above, the apparatus frame 1 is provided with the paper platform 2 on which the sheet bundle S is placed, and the paper platform 2 has a paper placement surface 2a arranged in the paper placement area 12 as shown in FIG. Yes. Guide flappers (sheet guides) 23a and 23b are arranged on the same plane on the paper mounting surface 2a. Guide flappers (sheet guides) 23a and 23b guide the sheet bundle sent from the left end in FIG. 5 or the sheet end sent from the right end in FIG. That is, the illustrated apparatus can set the sheet bundle to be cut on the paper platform 2 even if the sheet bundle is loaded upstream on the right side or the sheet bundle is loaded upstream on the left side in the state of FIG. The cut sheet bundle can be carried out from the paper platform 2 to the left or right downstream side.

[Paper retainer]
The paper pressing member 13 is formed with a pressure surface 13a, and the paper table 2 is formed with a paper surface 2a. The upper surface of the sheet bundle S is supported by the pressure surface 13a, and the lower surface is supported by the paper surface 2a. To do. When one of the pressing surface 13a and the paper loading surface 2a approaches the other, the sheet bundle S is pressed and held. In the illustrated example, the paper platform 2 is fixed to the base frame 1a, the pressure surface 13a is configured to be movable up and down in the sheet bundle thickness direction, and the sheet bundle S is sandwiched between the paper surface 2a and the pressure surface 13a. Press and hold.

[Paper holding mechanism]
The paper pressing mechanism attached to the press frame 1c will be described with reference to FIG. FIG. 6A shows a state in which the paper pressing member 13 formed integrally with the movable frame 16 of the press frame 1c is lowered from the upper standby position and the pressure surface 13a presses the sheet bundle S on the paper platform 2. Show. FIG. 4B shows a state in which the movable frame 16 is raised from the pressing position to the standby position and retracted above the sheet bundle S on the paper platform.

  As shown in FIG. 4, the press frame 1c includes a fixed frame 15 fixed to the base frame 1a and a movable frame 16 supported by the fixed frame so as to be movable up and down. A paper pressing member 13 is formed on the movable frame 16 (the one shown in the drawing is bent), and a pressure surface 13a is provided on the paper pressing member. The pressing surface 13a is arranged to be movable up and down in a posture facing the paper mounting surface 2a, and is separated from the pressing position (FIG. 4A) for pressing the sheet bundle S on the paper mounting table 2 and the paper mounting surface 2a. It moves up and down with the standby position (FIG. 4B).

  Therefore, the movable frame 16 is connected to the fixed frame 15 so as to draw a parallelogram by the swing links 18a and 18b. In FIG. 4, the right swing link 18a is pivotally supported by the fixed frame 15 so as to be swingable about the pivot fulcrum 18x, and the left swing link 18b is pivotally supported about the pivot fulcrum 18x. When the pair of left and right swing links 18a and 18b are swung clockwise by a predetermined angle from the pressed state of FIG. 4A, the paper pressing member 13 is raised to the standby state of FIG. On the contrary, when the swing links 18a and 18b are swung by a predetermined angle in the counterclockwise direction from the standby state in FIG. 5B, the paper pressing member 13 is lowered to the pressed state in FIG.

  A pressure spring 14 is arranged between the movable frame 16 and the fixed frame 15 so as to always urge the paper pressing member 13 of the movable frame 16 toward the paper loading surface 2a. In the illustrated example, pressure springs 14 a, 14 b, 14 c, 14 d, and 14 e are wound around a spring shaft 14 y, and the spring shaft 14 y is inserted and supported between the fixed frame 15 and the movable frame 16.

  The movable frame 16 needs to hold the paper pressing member 13 urged on the paper placement surface 2a by the pressure spring 14 above the paper placement surface 2a to carry (unload) the sheet bundle S to the paper placement area 12. There is. For this reason, a cam member 19 is arranged on the movable frame 16 along a travel stroke St in which the travel carriage 4 described below reciprocates. The illustrated cam member 19 is composed of a slide cam (cam plate) formed integrally with the movable frame 16. The cam plate (cam member) 19 is provided with a cam surface 19a. At the left limit position Sp2 and the right limit position Sp1 of the traveling carriage 4, the paper pressing member 13 rises to a standby position separated from the paper placement surface 2a. At the sheet cutting position (cutting region CL) located at the center of the position, the paper pressing member 13 presses and holds the sheet bundle S against the paper placing surface 2a.

  The cam surface 19a will be described. The cam surface 19a is formed so as to press and release the sheet bundle S on the paper platform 2 in conjunction with the cutting operation of the travel carriage 4 by the paper pressing member 13. Therefore, a follower member 20 (a floating roller; hereinafter referred to as “follower roller”) attached to the traveling carriage 4 is engaged with the cam surface 19a. The cam surface 19a and the follower roller 20 are not in contact with each other in the cutting area CL (see FIG. 3) where the sheet bundle S is cut, and in the left limit position Sp2 and the right limit position Sp1 apart from the cutting area CL of the sheet bundle S, Engage. In this engaged state, the paper pressing member 13 is in a standby state separated from the sheet bundle S on the paper platform 2, and in a non-contacting (non-engaging) state, the paper pressing member 13 is operated by the pressure spring 14. The sheet bundle S is pressed against the paper mounting surface 2a.

[Travel carriage]
The traveling carriage 4 (hereinafter simply referred to as “carriage”) that is attached to the sub-frame 1b and reciprocates along the paper mounting surface 2a with a predetermined stroke St will be described. As shown in FIG. 2, the carriage 4 is fitted to the upper guide rail 11 (the first guide rail 11a and the second guide rail 11b) and supported so as to reciprocate at a predetermined stroke St. The upper guide rail 11 is fixed to the subframe 1b, and the carriage 4 is arranged to reciprocate along the paper mounting surface 2a of the main frame 1a.

  The carriage 4 will be described with reference to FIG. FIG. 5 shows a central longitudinal section of the device. A cutting blade unit 3 to be described later is detachably attached to the carriage 4 and is fitted and supported by first and second guide rails 11a and 11b provided on the apparatus frame (subframe 1b). That is, the carriage 4 is provided with an engagement hole 41a that fits into the first guide rail 11a and an engagement hole 41b that fits into the second guide rail 11b. The carriage 4 fitted to the first and second guide rails 11a and 11b reciprocates at a predetermined stroke St along the paper placement surface 2a smoothly without positional deviation and backlash. The operation of the carriage 4 can be obtained by managing the parallelism between the guide rods, the accuracy of the rod diameter, and the processing accuracy of the engagement hole so that the movement can be performed tightly with little backlash.

  The drive mechanism of the carriage 4 will be described. In the subframe 1b shown in FIG. 2, traveling drive means 6 is arranged. The travel drive means 6 includes a drive motor M1 and a timing belt 48 that transmits the rotation of the drive motor M1 to the reciprocating movement of the carriage 4. The drive motor M1 is mounted and supported on the main frame 1a, and is constituted by a stepping motor capable of forward and reverse rotation. The timing belt 48 is supported by a pair of left and right pulleys (not shown) along the upper guide rail 11. The rotation of the drive motor M1 is transmitted to one of the pulleys by an intermediate transmission belt 47.

  A part of the timing belt 48 is fixed to the carriage 4, and when the belt is moved in the left or right direction by the drive motor M1, the carriage 4 is also moved in the same direction by the same amount.

  The carriage 4 is attached with a follower roller 20 that engages with the cam surface 19a described above. The follower roller 20 is fitted and supported so as to freely rotate on a support shaft implanted in the carriage 4. As a result, the height position (pressurization position or pressurization release position) of the cam surface 19a that receives the urging force of the pressure spring 14 is controlled by the movement operation of the carriage 4.

  The position control of the carriage 4 will be described. The carriage 4 is provided with a detection flag 4fr for detecting a position of the carriage 4 and position sensors Se1 and Se2. The illustrated apparatus is configured so that the initial position of the cutting operation of the sheet bundle S is set to the right limit position Sp1 and the left limit position Sp2 of the carriage 4, and the sheet bundle S is cut by each of the left and right movements of the carriage 4. Yes. Therefore, in the apparatus frame 1, a position sensor Se1 is disposed at the right limit position Sp1, a position sensor Se2 is disposed at the left limit position Sp2, and a sensor flag 4fr is disposed on the carriage 4 (see FIG. 3).

  With such a configuration, the control means (not shown) reciprocates the drive motor M1 between the right limit position Sp1 and the left limit position Sp2. At this time, the predetermined length is set in order from the right limit position Sp1 to the press operation area PL1, the cutting area CL, the press operation area PL2, and the left limit position Sp2. The press operation areas PL1 and PL2 are set to spans for executing an operation for pressing the sheet bundle S against the paper loading surface 2a and an operation for releasing the pressure on both sides of the sheet cutting area CL, and the cutting area CL cuts the sheet bundle S. The length is set based on the cutting length of the maximum size sheet.

  The control means detects the right limit position Sp1 with the position sensor Se1 and the left limit position Sp2 with the position sensor Se2, and controls the speed. In addition, as a configuration for speed control, an encoder and an encode sensor are arranged in the drive motor M1. As a result, for example, it is possible to operate the short brake of the drive motor M1 with the detection signals of the position sensors Se1 and Se2 and the encode signal of the encode sensor (not shown) or to increase or decrease the rotational speed of the motor.

[Cutting blade unit]
The cutting blade unit 3 is detachably attached to the carriage 4 described above. The cutting blade unit 3 includes an upper blade 32 composed of a blade 31 having knife edges 31a and 31b adapted to a bundle thickness for cutting the sheet bundle S, and a sheet bundle at a predetermined angle (acute angle θ) with the upper blade. A lower blade 33 for cutting so as to sandwich S and a blade edge holder 35 for holding the upper and lower blades 32, 33. The cutting blade unit 3 is provided with an opening / closing cover member 45 to be described later, and opens and closes between a closed state covering the knife edges 31a and 31b formed on the upper blade 32 and an exposed open state. Yes. The configuration of the opening / closing cover member 45 will be described later.

  The cutting blade unit 3 will be described with reference to FIG. The cutting blade unit 3 detachably attached to the carriage 4 by a method described later has knife edges 31 a and 31 b formed on a flat blade 31. The knife edge 31a cuts the sheet at the edge when the cutting blade unit 3 moves in one direction (forward direction), and the knife edge 31b on the opposite side is the sheet at the edge when the unit moves in the opposite direction (reverse direction). Disconnect. This is because the sheet bundle S is cut by bidirectional movement of the carriage 4 to which the cutting blade unit 3 is attached. Accordingly, when the sheet is cut only in one direction, for example, the forward direction, the knife edge may be formed only on one side edge of the blade.

  The upper blade 32 formed in this way has its base end portion 32a fixed to the base end portion 35a of the blade edge holder 35 with a fixing screw 34a, and its distal end portion 32b is fixed to the distal end portion 35b of the blade edge holder 35 with a fixing screw 34b. It is fixed (see FIG. 10B).

  On the other hand, the lower blade 33 is inclined with respect to the upper blade 32 at an angle θ (acute angle), and the same plane is cut in the cutting line direction along the lower surface of the sheet bundle S placed on the paper placement surface 2a. It is fixed to the blade edge holder 35 so as to move. The illustrated fixing screw 34b fixes the lower blade 33 together with the upper blade tip 32b.

  Further, the lower blade 33 is formed with a blade surface 33a wider than the blade width Wd of the upper blade 31 in the cutting direction, and the height position of the blade surface 33a is the surface position (the same height) as the paper mounting surface 2a. It is set at a slightly lower height (in the illustrated example, a gap δ is formed). This is because the lower blade 33 moves smoothly along the lower surface of the sheet bundle S pressed against the paper placing surface 2a. However, if the gap δ is large, there is a problem that the cutting quality is lowered. Therefore, it is optimal that the height position of the blade surface 33a is the surface position of the paper mounting surface 2a.

  The lower blade 33 is formed with a blade surface 33a for cutting the sheet bundle S in cooperation with the upper blade 32, and tapers 33b and 33c for guiding the lower surface of the sheet bundle to the blade surface 33a on both sides thereof. In the figure, when the lower blade 33 moves to the right, the taper 33b guides the lower surface of the sheet bundle toward the blade surface 33a, and when moved to the left in the opposite direction, the taper 33c moves the lower surface of the sheet bundle to the blade surface 33a. Guide you towards.

  The upper blade 32 and the lower blade 33 are formed so as to be joined and integrated with each other. However, if the sheet enters between the joining surfaces, a cutting failure is caused. A convex projection 33x is formed on the other side, and a concave fitting portion 32x is formed on the other side. By fitting the both, the two blades can be integrated without forming a gap.

  The configuration of the blade edge holder 35 will be described with reference to FIG. The blade edge holder 35 is configured in an arm shape having an arch-shaped curved portion 35c between a proximal end portion 35a and a distal end portion 35b. A blade base mounting portion (fixing screw 34a) for fixing a blade base portion (base end portion) 32a of the upper blade 32 is provided on the base end portion 35a, and a blade tip portion (tip portion) 32b of the upper blade 32 is provided on the front end portion 35b. A blade edge mounting portion (fixing screw 34b) for fixing the lower blade 33 and a lower blade mounting portion (fixing screw 34b) for fixing the lower blade 33 are provided.

  In the illustrated apparatus, the upper blade tip portion 32b and the lower blade 33 are fixed to the tip portion 35b of the blade edge holder 35 by the same fixing screw 34b, but this may be fixed by separate fixing means. Further, a space larger than the maximum cut width Wmax of the sheet bundle S is formed in the arcuate curved portion 35c of the blade edge holder 35 in a direction orthogonal to the traveling direction of the cutting blade unit 3 (see FIG. 10A).

  The lower blade 33 formed in this way is provided with a guide rail 17 (lower guide rail) in the cutting line direction while being fixed to the blade edge holder 35. The overall configuration is shown in FIG. 5, and the detailed configuration is shown in FIG. 10 (a). As shown in FIG. 10A, the paper platform 2 is formed integrally with the base frame 1a, and the lower guide rail 17 is bent on the paper platform 2. A guide surface 17a is formed in the cutting line direction, and a recessed groove 33g formed integrally with the lower blade 33 is fitted to the guide surface 17a.

  The lower blade 33 moves in the traveling direction along the guide surface 17a of the lower guide rail 17. This lower blade guide mechanism may form a recess (not shown) in the blade edge holder 35 without fitting the lower blade 33 on the guide surface 17a and fit this into the guide surface 17a. Further, the present invention can prevent the upper blade 32 from warping as shown by the broken line in FIG.

[Cutting paper piece regulating member]
Further, as described with reference to FIG. 19 (prior art), when the sheet bundle S is cut with a flat plate-shaped cutting blade that runs from one end to the other end, the paper sheet at the cutting portion rises locally (upward / warps upward). ) Phenomenon appears, and the quality of the cut surface is remarkably inferior due to the local warping and deformation of the sheet bundle S.

  In view of this, the apparatus shown in the figure arranges the cut paper piece regulating member 27 that prevents the cut paper piece from curling up so as to rise at the cutting site. FIG. 8A is a front view of the carriage 4 that moves along the cutting line, and FIG.

  A cutting paper piece regulating member 27 (hereinafter simply referred to as a regulating member) is disposed on the carriage 4 together with the cutting blade unit 3 described above. This restricting member 27 is disposed behind the cutting blade in the cutting direction in order to prevent the paper piece cut by the cutting blade unit 3 moving along the cutting line from rising upward (state shown in FIG. 19). The illustrated apparatus is disposed on the left and right of the upper blade 32 because of the bidirectional cutting in which the cutting blade unit 3 moves left and right. The illustrated regulating member 27 is composed of a roll member that rolls along the paper surface, and prevents the cut paper piece cut by the upper blade 32 from being pressed from above as shown in FIG.

  A pair of left and right swing arms 27a and 27b are supported on the carriage 4 so as to be swingable. In FIG. 8A, the right swing arm 27a is supported so as to be slidable about a support shaft 27x, and an idle roll 27r1 is rotatably supported at the tip. The left swing arm 27b is pivotally supported about a support shaft 27x, and an idler roll 27r2 is pivotally supported at the tip thereof. A biasing spring 28 holds the positions of the left and right swing arms 27a and 27b in the state shown in FIG.

  Therefore, when the carriage 4 moves in either the left or right direction, the swing roller 27r1 (27r2) in contact with the upper surface of the sheet on the paper platform 2a swings so that the roll positioned forward in the running direction follows the paper surface height. The roll located behind the running direction is pressed so as to prevent the cut piece of paper from being warped and pressed. The left and right swing arms 27a and 27b are swung within the ranges shown in FIGS. 8A and 8B, and are not swung by the stopper in other angular directions.

  As is apparent from FIGS. 8A and 8B, the pair of left and right swing rollers 27r1 and 27r2 of the present invention has a roll positioned forward in the running direction at the same height as the paper surface on the paper platform, and in the running direction. The roll located rearward is positioned at a position lower than the paper surface.

  As shown in FIG. 9, the pair of left and right swing rollers 27r1 (27r2) are conical rollers having a taper that gradually decreases in the trimming cut direction with reference to the paper surface of the sheet bundle supported by the paper platform 2. It consists of This is because the sheet to be cut is not stressed.

[Removal mechanism of blade holder]
A mechanism for detachably mounting the blade edge holder 35 on the carriage 4 will be described. When the cutting blade is formed by the thin blade 31, cutting resistance is low, and cutting with a small energy and high speed and cutting with relatively high finishing quality can be obtained. On the other hand, a thin blade is inferior in durability and needs to be frequently replaced due to damage or wear of the blade edge. Therefore, it is necessary to replace the cutting edge safely and easily without skill. The replacement of the cutting blade (blade) 31 in the illustrated apparatus will be described.

  FIG. 11 is an explanatory perspective view of a state in which the cutting blade unit 3 is mounted on the carriage 4. The carriage 4 configured as described above is supported on the upper guide rails 11a and 11b provided on the apparatus frame 1 so as to be able to reciprocate with a predetermined stroke. A cutting blade unit 3 is mounted on the carriage 4. FIG. 12A shows a side configuration of the carriage 4, FIG. 12B shows a side configuration of the blade holder 35, FIG. 12C shows a front configuration of the blade holder 35, and FIG. Indicates the state.

  On the carriage side, there are provided a lock lever 42 for engaging the positioning holder 35 with positioning pins 40a and 40b forming a blade edge holder 35 (hereinafter simply referred to as "holder"). On the holder side, positioning holes 43a and 43b adapted to the positioning pins 40a and 40b and an engaging groove 44 adapted to the engaging claw 42a formed in the lock lever 42 are provided. In the illustrated apparatus, positioning pins 40 and positioning holes 43 are formed at two locations.

  Referring to FIG. 12, the lock lever 42 is integrally formed with a locking claw 42a, and is attached to the outer wall of the carriage 4 so as to be swingable by a support shaft 42x. 42S shown in the figure is a lock spring that urges the locking claw 42a in the locking direction. 42p in the figure is a stopper.

  Further, as described above, the upper blade 32 and the lower blade 33 are fixed to the holder 35 by the fixing screws 34a and 34b. The upper blade 32 is formed with knife edges 31a and 31b in the traveling direction. Therefore, the illustrated apparatus is provided with a cover member (open / close cover) 45 that covers the knife edges 31a and 31b. The cover member has a closed state that covers the knife edges 31a and 31b on the holder 35 and an open lid that exposes the edges. It is attached so that it can be opened and closed between states.

  In the first embodiment shown in FIG. 12, which will be described later, the cover member 45 opens and closes in a state of covering the knife edges 31a and 31b and an exposed state by an operation of swinging around the rotation shaft 45x. Further, in the second embodiment shown in FIG. 14 described later, the cover member 46 is slidably fitted to the blade 31 of the upper blade, and is opened and closed in a state of covering and exposing the knife edge 31 by its vertical movement.

[First embodiment of attaching and detaching the blade edge holder]
The form which opens and closes the knife edges 31a and 31b by the attachment / detachment operation of the blade edge holder 35 shown in FIG.12 and FIG.13 is demonstrated. For convenience of explanation, the “opened state” of the open / close cover 45 is a state in which the cover is opened and the knife edges 31a and 31b are exposed so that the sheet bundle S can be cut (FIG. 13B). Is defined as a state in which the knife edges 31a and 31b are covered so that the opening / closing cover 45 cannot be cut (FIG. 13A). As described above, the upper blade 32 and the lower blade 33 are attached to the blade edge holder 35 with the fixing screws 34 a and 34 b, respectively, and are strongly protected by the arcuate curved portion 35 c of the blade edge holder 35.

  12A and 12B are explanatory views showing a state in which the blade edge holder 35 is mounted on the carriage 4. FIG. FIG. 13 is an enlarged explanatory view of the blade edge holder 35. FIG. 13A shows a state in which the opening / closing cover 45 covers the knife edges 31a and 31b of the blade edge blade 31 (closed state), and FIG. Indicates a state (opened state) in which the opening / closing cover 45 exposes the knife edges 31a, 31b.

  As shown in FIG. 12C, the upper blade 32 is fixed to the proximal end portion 35a and the distal end portion 35b of the blade edge holder 35 with fixing screws 34a and 34b, and the knife edges 31a and 31b are formed at both ends thereof. An open / close cover 45 is attached so as to be swingable about a support shaft 45x so as to cover the knife edges 31a and 31b. The opening / closing cover 45 covers the back surface of the blade 31 as shown in FIG. 5D, and the front surface covers the knife edges 31a and 31b with a flange portion 45y protruding in a released state. When the opening / closing cover 45 is rotated in the direction away from the back side of the blade 31 with such a configuration, the knife edges 31a and 31b are exposed to the front side. And this flange part 45y is formed in the height which is not injured by knife edge 31a, 31b even if a user touches carelessly.

  As shown in FIG. 13, the opening / closing cover 45 is pivotally supported by the blade edge holder 35 by a support shaft 45x. A biasing spring 35S is provided between the blade edge holder 35 and this spring constantly biases the opening / closing cover 45 in a direction to engage with the knife edges 31a and 31b of the upper blade 32. The opening / closing cover 45 is disposed at a position where it engages with the positioning pin 40 described above. When the positioning pin 40 is fitted into the positioning hole 43, the tip of the pin engages with the opening / closing cover 45 and the support shaft 45x is the center. The open / close cover 45 is swung in the state of FIG. At this time, the open / close cover 45 rotates around the support shaft 45x against the biasing spring 35S, and the tip of the open / close cover 45 abuts against the blade edge holder (shown in the figure is an arch-shaped curved portion 35c) and is held in that position.

  When the blade edge holder 35 is detached from the carriage 4, the positioning pin 40 is detached from the positioning hole 43. Then, the tip of the pin is separated from the opening / closing cover 45, and the opening / closing cover 45 covers the edges of the knife blades 31a, 31b of the upper blade 32 by the action of the urging spring 35S and covers the blade edge (see FIG. 13A).

  In the configuration shown in the figure, the positioning pin 40 is disposed on the carriage 4 and the positioning hole 43 corresponding to the positioning pin 40 is disposed on the blade edge holder 35. On the contrary, the positioning pin is positioned on the blade edge holder 35. It is also possible to arrange the holes in the carriage 4. In this case, a transmission lever that swings the opening / closing cover 45 in the opening direction is arranged in conjunction with the operation of inserting the pin into the hole.

[Mode to open and close the blade cover by moving the traveling carriage]
Next, the embodiment shown in FIG. 14 will be described. In the first embodiment, the knife edges 31a and 31b of the blade 31 are connected to the support shaft 45x.
The case where it opens and closes with the opening-and-closing cover 45 rotating centering on was shown. FIG. 14 shows a case in which the knife edges 31 a and 31 b are opened and closed by an opening / closing cover 46 that slides the blade 31.

  The blade 31 is fixed to the blade edge holder 35 with fixing screws 34a and 34b. Although not shown, the blade edge holder is the same as that described above, and only the holder base end (connecting portion) 35a attached to the carriage 4 is illustrated. . Two positioning holes 43a and 43b are provided in the base end portion 35a of the blade edge holder, and positioning pins 40a and 40b arranged on the carriage 4 are fitted therein. The upper blade 32 is fixed between the holder base end portion 35a and the holder front end portion 35b with fixing screws 34a and 34b.

  Therefore, in the illustrated embodiment, a sleeve-like opening / closing cover 46 is fitted to the upper blade 32. The open / close cover 46 is fitted (freely fitted) to the blade 31 and is always disposed so as to fall to the fixed blade side by its own weight. The opening / closing cover 46 is connected to a distal end portion 49b of a lever spring 49 disposed at the holder base end portion 35a. On the other hand, on the carriage side, an opening / closing operation piece (projection in the drawing) 40c is provided at a position adjacent to and separated from the positioning pin 40. The opening / closing operation piece 40c enters the holder through an opening 35d formed in the holder base end portion 35a, and pushes down the base end portion 49a of the lever spring 49. The lever spring 49 is loosely fitted on a flange formed around the fixed screw 34a and is rotatably supported.

  In such a configuration, the blade edge holder 35 is in its state before being attached to the carriage 4, and the opening / closing cover 46 has its own weight (or an urging spring (not shown)) to bring the knife edge 31 a of the upper blade 32 into the state shown in FIG. , 31b is covered. That is, the open / close cover 46 covers and protects the knife edges 31a and 31b of the blade 31 in the closed state. Therefore, when the blade edge holder 35 is mounted on the carriage 4, the opening / closing operation piece 40 c presses the proximal end portion 49 a of the lever spring 49 simultaneously with the fitting of the positioning pins 40 a and 40 b.

  When the base end portion 49a of the lever spring is swung counterclockwise in FIG. 5B, the tip end portion 49b slides the opening / closing cover 46 upward from the state covering the knife edges 31a and 31b. As a result, the open / close cover 46 of the upper blade 32 slides upward from the closed state covering the knife edges 31a and 31b to the open state.

  In the illustrated embodiment, the lever spring 49 rotates around the fixing screw. However, a rotation center different from the fixing screw may be provided.

[Transport guide mechanism]
The above-described paper platform 2 is provided with a conveyance guide mechanism 22 that guides the sheet bundle S to the opening 12 from the outside. As shown in FIG. 5, a pair of upper and lower sheet guides 23a and 23b are attached to the guide frame 1d on the upstream side in the transport direction of the paper platform 2. The upper and lower sheet guides 23a and 23b are supported by rotating shafts 24a and 24b so that the base end portions thereof can swing on the guide frame 1d. And it is always urged | biased by the solid line state of the figure with the spring which is not shown in figure. As a result, the upper and lower sheet guides 23a and 23b are centered on the rotation shafts 24a and 24b at the base end portions in the solid line operating posture (sheet bundle S set posture) and the broken line retracted posture (sheet bundle S cutting posture). And is urged by an urging spring (not shown) in one direction of the operating posture and the retracting posture.

  The rotation shafts 24a and 24b of the sheet guides 23a and 23b are provided with interlocking gears (not shown) that mesh with each other, and the reference numeral 25 in the figure is a transmission gear that constitutes the interlocking mechanism. The rotation of the flapper motor M2 is transmitted to the transmission gear 25, and the opening / closing operation of the sheet guides 23a and 23b is executed. In this way, the pair of upper and lower sheet guides 23a and 23b are in the operating posture (the solid line state in FIG. 5) when the sheet bundle S is set at the cutting position, and in the retracted posture (the broken line state in FIG. 5) when cutting the set sheet bundle S. It will open and close. In the present invention, a mechanism that opens and closes by a drive motor is shown, but it may be operated by an actuator such as an operating solenoid.

[Cutter control unit]
As described above, the drive motor M1 is attached to the apparatus frame 1 (the sub-frame 1b in the drawing), and this drive motor M1 is configured by an electromagnetic motor capable of forward and reverse rotation or a stepping motor. In the case of an electromagnetic motor, pulse control is possible with an encoder and an encode sensor. Further, the carriage 4 that reciprocates at a predetermined stroke St detects its left limit position Sp2 and right limit position Sp1 by position sensors Se1, Se2.

  The rotation of the drive motor M1 configured in this way is transmitted to the timing belt 48 via the intermediate transmission belt 47, and this timing belt has a predetermined stroke along the guide rails (the upper guide rail 11 and the lower guide rail 17). It is arranged between the pulleys so as to reciprocate the traveling carriage 4 at St. The traveling carriage 4 is integrally provided with a follower roller 20, which engages with a cam surface 19a of a cam member 19, and this cam surface is a standby position in which the paper pressing member 13 is separated from the paper mounting surface 2a (FIG. 4). It is formed so as to shift between (b)) and a pressurizing position (FIG. 4A) for pressing the sheet on the paper mounting surface.

  Further, the paper pressing member 13 receives the action of the pressure spring 14 as described above, and in FIG. 4 (a) showing the pressure state of the sheet and FIG. 15 (c) showing a part of the state, the cam surface 19a and the follower roller are shown. 20 are disengaged from each other, and the spring force of the pressure spring 14 is transmitted to the paper pressing member 13 to press the upper surface of the sheet. When the carriage 4 is located at the right limit position Sp1 and the left limit position Sp2, the spring force of the pressure spring 14 is received by the engaging portion of the cam surface 19a and the follower roller 20, and the paper pressing member 13 is on the paper placement surface 2a. It is located at the standby position Wp away from the sheet bundle S.

  15A shows the relationship between the cam surface 19a and the travel stroke St of the carriage 4. FIG. 15B shows the speed control. FIG. 15C shows the spring mechanism in the pressurized state. d) each shows a spring mechanism in a standby state. In FIG. 15A, the carriage 4 reciprocates between the right limit position Sp1 and the left limit position Sp2. This travel stroke St is preset with a pressurization area St1 and a pressure release area St7 on the left and right of the cutting area St4 with respect to the maximum size sheet, and a cutting initial area St3 and a cutting end area St5 for the cutting area St4. Has been. The stroke explanation in FIG. 15A shows a case where the carriage 4 moves from the left limit position Sp2 toward the right limit position Sp1. In the figure, areas St2 and St6 are takeover areas in which the carriage moves.

  Therefore, the control means of the drive motor M1 rotates at a low speed V1 when the paper pressing member (press member) 13 moves from the standby position (FIG. 4B) to the operating position (FIG. 4A), and then After the cutting blade unit 3 finishes cutting (St3) at the cutting start end of the sheet bundle S, the drive motor M1 is rotated at a high speed. That is, as shown in FIG. 15A, the sheet is driven at a low speed V1 from the initial position (Sp2) until the pressing operation (St1) of the paper pressing member 13 is completed, and then the sheet bundle S is initially cut at a medium speed V2. It moves until the region St3 ends. Thereafter, the sheet moves at a high speed V3, and in the sheet bundle cutting end region St5, the sheet is decelerated to a medium speed V2 to cut the sheet bundle. After finishing the sheet bundle cutting portion, the sheet is driven again at the low speed V1 to release the pressing force of the paper pressing member 13, and then reaches the stroke right limit position Sp1.

  That is, the maximum torque acts as a load on the drive motor M1 (carriage travel motor) in the operation of pressurizing the sheet bundle S stacked on the paper placement surface. At this time, the torque generated by rotating the drive motor M1 at the minimum speed V1 is converted into the moving force of the follower roller 20 that moves on the cam surface 19.

  Next, the control means sets the rotation speed of the drive motor M1 to the medium speed in the initial cutting area St3 and the cutting end area St5 for starting the cutting of the sheet bundle S. This speed may be substantially the same as the low speed, but work efficiency can be improved by providing a speed difference (V2 ≧ V1). This medium speed region is necessary to improve the cutting quality by cutting at a low speed at the initial stage when cutting a sheet bundle, then cutting at a high speed and then ending at a low speed. by. Accordingly, the low speed V1 sets the speed to the optimum condition for transmitting the torque of the drive motor M1 to the pressurizing mechanism, and the medium speed V2 sets the speed of the torque of the drive motor M1 to the optimum condition for starting cutting of the sheet, and the high speed. V3 preferably sets the speed of the torque of the drive motor M1 to an optimum condition for cutting the sheet efficiently. Under these conditions, optimum values are determined by experiment according to the properties of the sheet to be cut.

[Configuration of post-processing equipment]
The image forming system shown in FIG. 16 will be described. The figure includes an image forming apparatus B and a post-processing apparatus C that performs folding processing by aligning and stacking image-formed sheets. The sheet cutting apparatus A according to the present invention is incorporated in the post-processing apparatus C as a unit.

  The image forming apparatus B forms the sheet fed from the paper feeding unit 55 with the image forming unit 56 and then carries it out to the paper discharge roller 57. The image forming unit 56 can employ various image forming mechanisms such as an electrostatic printing mechanism, an inkjet printing mechanism, an offset printing mechanism, and an ink ribbon printing mechanism. The sheet feeding unit 55 stores sheets of different sizes in a plurality of cassettes, feeds sheets of a size according to image forming conditions one by one, and supplies them to the image forming unit 56. The image forming unit 56 forms an image on the sheet, and after fixing by a fixing unit such as heat fixing, the image forming unit 56 carries it out to the paper discharge roller 57. A post-processing device C is connected to the downstream side of the paper discharge roller 57.

  The post-processing apparatus C performs a binding process such as stapling by aligning and stacking the sheets loaded from the carry-in port 58 on the processing tray 59, and trimming cutting one or three sides of the edge edge of the sheet bundle. Finish processing. The illustrated apparatus is a finishing apparatus that trims and aligns one edge of the edge of a bound sheet bundle. The cut sheet bundle is stored in a paper discharge stacker 66 arranged on the downstream side. The specific configuration of the sheet cutting apparatus A is as described above.

  In FIG. 16, 60 is a punch unit, 61 is an end-stitching staple unit, and 62 is a saddle stitching staple unit. Then, the sheet sent from the image forming apparatus B is unloaded from the carry-in port 58 onto the processing tray, and the sheets are aligned and stacked on the tray, and then stored in the first stack tray. Similarly, the sheets sent from the carry-in port 58 are accumulated in the second processing unit 63, and the center portion of the sheet is bound by the saddle stitching staple unit 62 disposed in the second processing unit.

  Next, the sheet bundle is conveyed to the folding processing unit 64, where the folding processing unit folds the sheet with a folding blade 64a and a folding roll 64b (magazine finishing). At this time, the edge ends of the sheets become uneven, and finishing is performed by cutting the edges. Therefore, a sheet cutting device (unit) A is disposed on the downstream side of the folding roll 64b, and the edge of the sheet is trimmed while the folded sheet bundle is being carried out to the paper discharge stacker 66.

[Description of fixed blade]
In the present invention, the shape of the lower blade 33 is shown as a chopping plate-shaped rectangular block. However, the lower blade 33 together with the upper blade 32 is a sheet bundle placed on the paper placing surface 2a. Move while rubbing the lower surface. At this time, since the lower surface of the sheet may be soiled, the lower blade may be constituted by an acute-angled blade edge 70 having a knife edge as shown in FIG.

[Folding roll mechanism]
FIG. 17 shows a case in which the sheet is guided to the paper mounting surface by the folding roll means 50 for folding the sheet, instead of the guide flappers (sheet guides) 23 a and 23 b for guiding the sheet to the paper mounting table 2. In this case, since the guide flapper and the drive mechanism for opening and closing the guide flapper are not required, the apparatus can be configured to be small and compact.

  That is, a pair of folding rolls 50a and 50b are arranged in a direction orthogonal to the stacking guide 51 for stacking sheets, and the sheet is fed out in the folding direction by the folding blade 52 disposed on the opposite side. The paper platform 2, the traveling carriage 4, and the cutting blade unit 3 are arranged in front of the folded sheet feeding direction. A conveyance roller 53 that conveys the sheet is disposed downstream of the sheet cutting apparatus A. In such a configuration, the rear end portion of the sheet bundle fed out from the folding roll means 50 is detected by the sensor 54S, and the conveying roller 53 is rotated based on the sheet rear end detection signal of this sensor to the traveling position of the cutting blade. The cutting width is determined so that the cutting line is located.

A Sheet cutting device Sp1 Right limit position Sp2 Left limit position 1 Device frame 2 Paper loading table 2a Paper loading surface 3 Cutting blade unit 4 Traveling carriage 11 Guide rail (traveling guide means)
13 Paper holding member 14 Pressure spring (14a-14e)
19 cam member 19a cam surface 20 follower roller 27 cutting paper piece regulating member (regulating member)
31 Blade 31a Knife edge 31b Knife edge 32 Upper blade 33 Lower blade 34a Fixing screw (blade base mounting portion)
34b Fixing screw (upper blade tip attachment, lower blade attachment)
35 Cutting edge holder 40 Positioning pin 43 Positioning hole 45 Open / close cover (cover member)
46 Cover member (second embodiment)

Claims (6)

A device for cutting paper sheets with a cutting blade detachably attached to a traveling carriage that reciprocates along a cutting line,
A device frame;
A traveling carriage attached to the device frame so as to be reciprocable at a predetermined stroke;
A cutting blade removably attached to the traveling carriage;
Drive means for reciprocating the traveling carriage;
With
The cutting blade is
A cutting edge blade having a knife edge formed in a cutting depth direction;
A cover member that opens and closes to a closed state that covers the knife edge and an open state that exposes the knife edge;
A blade holder for holding the blade blade and the cover member;
Consisting of
The blade edge holder is detachably attached to a holder mounting portion provided in the traveling carriage,
In the operation of mounting the blade edge holder, the cover member is changed from the closed posture to the open posture.
With the operation of removing the blade edge holder, the cover member is changed from an open posture to a closed posture.
Paper sheet cutting device characterized by opening and closing movement. The cover member is slidably or rotatably attached to the blade edge holder,
The paper sheet cutting device according to claim 1, wherein the holder mounting portion of the traveling carriage is provided with cover shift means for sliding or rotating the cover member. The cover member is rotatably attached to the blade edge holder between an open state and a closed state,
The cover shift means is
The paper sheet cutting device according to claim 1, wherein the cover member is configured to include a bias release unit that releases a biasing force of a biasing unit that biases the cover member in the closing direction or the opening direction. apparatus. The blade edge holder and the traveling carriage are formed such that a positioning pin is fitted on one side and a positioning hole is fitted on the other,
The cover shift means is
The paper sheet cutting device according to claim 3, wherein the cover member is rotated to the open state against the urging spring by the fitting operation of the positioning pin and the positioning hole. The cutting blade has a flat plate shape, and a knife edge having a single blade shape is formed on each of the leading edge and the trailing edge in the cutting line direction. The knife edge is an inclined surface that gradually becomes narrower from the blade edge toward the blade edge. The paper sheet cutting device according to any one of claims 1 to 4, wherein the paper sheet cutting device is formed. A cutting blade unit that is detachably attached to a traveling carriage that reciprocates along a cutting line,
A cutting edge blade having a knife edge formed in a cutting depth direction;
A cover member that opens and closes to a closed state that covers the knife edge and an open state that exposes the knife edge;
A blade holder for holding the blade blade and the cover member;
Consisting of
The blade edge holder is
The cover member is moved from the closed position to the opened position by the operation of mounting on the traveling carriage.
The cover member is moved from the open posture to the closed posture by the operation of separating from the traveling carriage.
A cutting blade unit configured to open and close respectively.