WO2018229922A1

WO2018229922A1 - Medium transport device, and binding member removal device

Info

Publication number: WO2018229922A1
Application number: PCT/JP2017/022072
Authority: WO
Inventors: 安川　亮一; 茂治岡野; 夕貴松田
Original assignee: 株式会社Pfu
Priority date: 2017-06-15
Filing date: 2017-06-15
Publication date: 2018-12-20

Abstract

A medium transport device comprising a plurality of payout belts (15) and a suction part (31). The suction part (31) suctions the air located in a space formed between the plurality of payout belts (15) and a medium placed on a platen (2). When coming into contact with the plurality of payout belts (15), the medium is payed out by the movement of the plurality of payout belts (15). The suction part (31) suctions air via a plurality of left-side air suction holes (33-1) and a plurality of right-side air suction holes (33-2), thereby drawing the medium toward the plurality of payout belts (15) with a first suction force. The suction part (31) furthermore suctions air via a plurality of central air suction holes (34), thereby drawing the medium toward the plurality of payout belts (15) with a second suction force. At such time, the first suction force is greater than the second suction force.

Description

Medium conveying device and binding member removing device

The technology of the present disclosure relates to a medium conveying device and a binding member removing device.

It is widely performed to digitize a plurality of media bound in a binder using a scanner device. The medium bound to the binder may include a binding medium in which a plurality of paper documents are bound with staples or clips. When such a binding medium is inserted into the scanner device as it is, the binding medium may be damaged or the scanner device may be broken. For this reason, it is determined whether or not the medium inserted into the scanner device is bound with staples. If a staple is found, the medium is inserted into the scanner device after the staple is removed. There is known an apparatus that automatically detects the position of a staple that binds a binding medium and automatically removes the staple from the binding medium (see Patent Document 1).

Also, an apparatus is known that sorts a binding medium to a different location from a plurality of media in which the binding medium and a single medium formed from a single paper document are mixed (see Patent Document 2). An apparatus is known that feeds a medium by bringing the medium into contact with a belt by sucking air (see Patent Document 3).

Japanese Patent Laid-Open No. 06-186650 Japanese Patent Laid-Open No. 2004-210457 JP 05-262437 A

However, a device that sucks air and transports a medium sucks air more strongly when transporting a binding medium, because the binding medium is heavier than a single medium, compared to when transporting a single medium. There is a need to. For this reason, such an apparatus has a problem that power consumption is increased when the binding medium is conveyed.

The disclosed technique has been made in view of the above points, and an object thereof is to provide a medium conveying device and a binding member removing device that reduce power consumption.

In the disclosed aspect, the medium transport device includes a feeding belt, a suction unit, and a driving unit. The suction unit sucks air disposed in a space formed between the medium placed on the document table and the feeding belt through a plurality of air inlets. The driving unit moves the feeding belt so that the medium is fed when the medium is in contact with the feeding belt. The first suction force that attracts the medium to the feeding belt by sucking air through the first air inlets of the plurality of air inlets is routed through the second air inlets of the plurality of air inlets. The suction force is larger than the second suction force that attracts the medium to the feeding belt.

The disclosed medium conveying device and binding member removing device can reduce power consumption.

FIG. 1 is a perspective view illustrating a medium conveyance device according to an embodiment. FIG. 2 is a perspective cross-sectional view illustrating the medium conveyance device of the embodiment. FIG. 3 is a bottom view showing a plurality of feeding belts. FIG. 4 is a side sectional view showing the upper conveyance guide. FIG. 5 is a bottom view showing a plurality of blowers. FIG. 6 is a front view showing the suction force that the suction unit draws the medium placed on the document table. FIG. 7 is a front view showing a suction force necessary for bringing a single medium placed on the document table into contact with a plurality of feeding belts. FIG. 8 is a front view showing a suction force required when the left-end binding medium placed on the document table is brought into contact with a plurality of feeding belts. FIG. 9 is a front view showing a suction force required when the center binding medium placed on the document table is brought into contact with a plurality of feeding belts. FIG. 10 is a block diagram illustrating the binding member removing device. FIG. 11 is a flowchart showing the operation of the binding member removing apparatus. FIG. 12 is a graph showing a change in suction force that attracts the medium to the upper transport guide. FIG. 13 is a front view showing the state of the medium before the process of step S1 is executed. FIG. 14 is a front view showing the state of the medium after the process of step S1 is executed. FIG. 15 is a front view showing a state of the medium after the left end region contacts the plurality of feeding belts. FIG. 16 is a front view showing the state of the medium after the process of step S3 is executed. FIG. 17 is a graph showing a comparative example of a change in suction force that attracts the medium to the upper transport guide. FIG. 18 is a front view showing a state of a medium sucked by a change in suction force of the comparative example. FIG. 19 is a front view showing a state of the plurality of feeding belts and the plurality of air inlets when the medium contacts the plurality of feeding belts. FIG. 20 is a front view showing a state of the plurality of feeding belts and the plurality of intake ports after the plurality of feeding belts 15 are driven. FIG. 21 is a front view showing a state of the plurality of feeding belts and the plurality of intake ports after the plurality of feeding belts are further driven. FIG. 22 is a front view showing a state of the plurality of feeding belts and the plurality of intake ports after the plurality of feeding belts 15 are further driven. FIG. 23 is a side cross-sectional view showing a state of the medium before air is sucked. FIG. 24 is a side sectional view showing a state of the medium after air is sucked. FIG. 25 is a side sectional view showing a state of the medium after the plurality of feeding belts are moved. FIG. 26 is a side cross-sectional view illustrating a state of the next medium after the medium is conveyed until it is separated from the plurality of feeding belts. FIG. 27 is a graph showing a modified example of the change in suction force by which the medium is attracted to the upper transport guide.

Hereinafter, a medium conveying device and a binding member removing device according to an embodiment disclosed in the present application will be described with reference to the drawings. In addition, this invention is not limited by the following description. Moreover, in the following description, the same code | symbol is provided to the same component and the overlapping description is abbreviate | omitted.

FIG. 1 is a perspective view showing a medium carrying device 1 according to an embodiment. As shown in FIG. 1, the medium conveying device 1 is used as a part of the binding member removing device 10. The medium conveying apparatus 1 includes a document table 2, a left side guide 3-1, and a right side guide 3-2. The document table 2 is provided with a placement surface 5 that is substantially parallel to an installation surface on which the binding member removing device 10 is placed. The left side guide 3-1 is formed in a flat plate shape. The left side guide 3-1 is disposed along a plane perpendicular to the placement surface 5 and is fixed to the document table 2. The right side guide 3-2 is formed in a flat plate shape. The right side guide 3-2 has a distance between the left side guide 3-1 and the right side guide 3-2 so as to be along another plane parallel to the plane along which the left side guide 3-1. The document table 2 is fixed so as to be substantially equal to the width of a predetermined paper document. An example of the distance between the left side guide 3-1 and the right side guide 3-2 is 300 mm.

The medium transport apparatus 1 further includes a left side blower 6-1 and a right side blower 6-2. The left side blower 6-1 blows air to the end surface of the medium placed on the placement surface 5 of the document table 2 that faces the left side guide 3-1. The right side blower 6-2 blows air to the end surface of the medium placed on the placement surface 5 of the document table 2 that faces the right side guide 3-2.

FIG. 2 is a perspective cross-sectional view showing the medium transport device 1 of the embodiment. The medium transport apparatus 1 further includes a lower transport guide 7 as shown in FIG. The lower conveyance guide 7 is formed of a bent plate, and a conveyance path lower surface 11 and a paper setting surface 12 are formed. The conveyance path lower surface 11 is formed substantially flat. The lower conveyance guide 7 is disposed such that the conveyance path lower surface 11 faces upward and the conveyance path lower surface 11 is along a plane parallel to the placement surface 5. The plane along which the conveyance path lower surface 11 extends is disposed above the plane along which the placement surface 5 extends. The sheet setting surface 12 is formed so as to face the document table 2, and faces slightly upward so as to follow a plane inclined by approximately 70 degrees with respect to a plane parallel to the placement surface 5. The medium transport apparatus 1 has a transport path 14 formed therein. The conveyance path 14 is formed along a plane parallel to the placement surface 5, and is disposed on the conveyance path lower surface 11 along the conveyance path lower surface 11.

The medium transport device 1 further includes a plurality of feeding belts 15 and a plurality of fixed pulleys 16. Each of the plurality of feeding belts 15 is formed of a flexible material and is formed into a loop-shaped band. Each of the plurality of feeding belts 15 is movably spanned by a plurality of fixed pulleys 16 so as to be movable. The plurality of fixed pulleys 16 are arranged such that all of the plurality of feeding belts 15 are arranged on the upper part of the conveying path 14 and a part of the plurality of feeding belts 15 is along the conveying path 14. .

The medium transport device 1 further includes a separation blower 17. The separation blower 17 is disposed below the lower conveyance guide 7. The separation blower 17 is placed on the placement surface 5 of the document table 2 through a blower port (not shown) formed in a portion of the lower conveyance guide 7 where the paper setting surface 12 is formed. Air is blown onto the end surface of the lower conveyance guide 7 facing the paper setting surface 12 of the medium to be printed.

The medium transport apparatus 1 further includes a pair of first transport rollers 18 and a pair of second transport rollers 19, and further includes a pair of third transport rollers not shown. The pair of first transport rollers 18 are each formed in a columnar shape and are disposed in the middle of the transport path 14. The pair of first conveyance rollers 18 convey the medium passing through the conveyance path 14 downstream in the document conveyance direction 20 by rotating with the medium passing through the conveyance path 14 interposed therebetween. The pair of second transport rollers 19 are each formed in a columnar shape, and the transport path is arranged such that the pair of first transport rollers 18 is disposed between the pair of second transport rollers 19 and the plurality of feeding belts 15. 14 is disposed downstream of the pair of first conveying rollers 18. The pair of second transport rollers 19 transport the medium passing through the transport path 14 by rotating with the medium passing through the transport path 14 interposed therebetween. The pair of third transport rollers are each formed in a columnar shape, and the pair of second transport rollers 19 is disposed between the pair of first transport rollers 18 and the pair of third transport rollers. It is arranged downstream of the second transport roller 19. The pair of third transport rollers rotate with the medium passing through the transport path 14 interposed therebetween, thereby discharging the medium passing through the transport path 14 to the outside of the binding member removing device 10.

The binding member removing apparatus 10 further includes a staple detecting unit 21 and a staple removing unit 22. The staple detection unit 21 is disposed between the pair of first conveyance rollers 18 and the pair of second conveyance rollers 19 in the conveyance path 14, and is disposed on the downstream side of the pair of first conveyance rollers 18. The staple detection unit 21 detects whether the medium passing through the transport path 14 is bound by staples. The staple detection unit 21 further detects an area in which staples are arranged in the binding medium that passes through the conveyance path 14.

The staple removing unit 22 is disposed between the pair of second transport rollers 19 and the pair of third transport rollers in the transport path 14, and is disposed on the downstream side of the pair of second transport rollers 19. The staple removing unit 22 removes the staples from the binding medium passing through the conveyance path 14 by performing an operation similar to the operation of removing the staples by the operator using the staple staple remover.

FIG. 3 is a bottom view showing a plurality of feeding belts 15. As shown in FIG. 3, the plurality of feeding belts 15 include a plurality of left feeding belts 24-1, a plurality of right feeding belts 24-2, and a plurality of center feeding belts 25. The plurality of left feeding belts 24-1 are disposed on the left side blower 6-1 side. The plurality of right feeding belts 24-2 are arranged on the right side blower 6-2 side. An upstream end of the right belt medium contact portion 26-2 along the conveyance path 14 among the plurality of right feeding belts 24-2 is a left belt medium along the conveyance path 14 among the plurality of left feeding belts 24-1. It is arranged at the same position in the document conveying direction 20 with the upstream end of the contact part 26-1. The downstream end of the right belt medium contact portion 26-2 is disposed at the same position in the document transport direction 20 as the downstream end of the left belt medium contact portion 26-1.

The plurality of central feeding belts 25 are disposed between the plurality of left feeding belts 24-1 and the plurality of right feeding belts 24-2. The upstream end of the central belt medium contact portion 27 along the conveying path 14 among the plurality of central feeding belts 25 is the upstream end of the left belt medium contact portion 26-1 or the right belt medium contact portion 26-2. They are arranged at the same position in the document conveying direction 20. The downstream end of the central belt medium contact part 27 is disposed at a position upstream from the downstream end of the left belt medium contact part 26-1 or the right belt medium contact part 26-2.

The pair of first transport rollers 18 is disposed downstream of the downstream end of the central belt medium contact portion 27, and from the downstream end of the left belt medium contact portion 26-1 or the right belt medium contact portion 26-2. Arranged upstream. That is, the pair of first conveying rollers 18 is disposed on the downstream side of the central belt medium contact part 27 and is disposed between the left belt medium contact part 26-1 and the right belt medium contact part 26-2.

The medium transport apparatus 1 further includes a left suction detection sensor 28-1, a right suction detection sensor 28-2, a central suction detection sensor 29, and a document detection sensor 30. The left side suction detection sensor 28-1 is disposed in the vicinity of the upstream end of the left belt medium contact portion 26-1. The left suction detection sensor 28-1 detects whether or not the medium is in contact with the left belt medium contact portion 26-1. The right suction detection sensor 28-2 is disposed in the vicinity of the upstream end of the right belt medium contact portion 26-2. The right suction detection sensor 28-2 detects whether or not the medium is in contact with the right belt medium contact portion 26-2.

The central suction detection sensor 29 is disposed in the vicinity of the upstream end of the central belt medium contact portion 27. The central suction detection sensor 29 detects whether or not the medium is in contact with the central belt medium contact portion 27. The document detection sensor 30 is disposed in the vicinity of the pair of first transport rollers 18. The document detection sensor 30 detects whether or not the pair of first transport rollers 18 is transporting the medium.

The medium transport device 1 further includes a suction unit 31. The suction unit 31 includes an upper conveyance guide 32. The upper conveyance guide 32 is formed in a plate shape, and includes a plurality of feeding belts so that the plurality of feeding belts 15 are disposed along the conveyance path 14 and between the upper conveyance guide 32 and the conveyance path 14. 15 is arranged at the top.

The upper conveyance guide 32 has a plurality of air inlets. The plurality of intake ports include a plurality of left intake ports 33-1, a plurality of right intake ports 33-2, a plurality of central intake ports 34, a plurality of left downstream intake ports 35-1, and a plurality of right downstream intake ports 35. -2. The plurality of left intake ports 33-1 are disposed in the vicinity of the upstream end of the left belt medium contact portion 26-1. The plurality of right air inlets 33-2 are disposed in the vicinity of the upstream end of the right belt medium contact portion 26-2. The upstream ends of the plurality of right intake ports 33-2 are disposed at the same position in the document transport direction 20 as the upstream ends of the plurality of left intake ports 33-1. The downstream ends of the plurality of right intake ports 33-2 are disposed at the same position in the document transport direction 20 as the downstream ends of the plurality of left intake ports 33-1.

The plurality of central intake ports 34 are disposed between the plurality of left intake ports 33-1 and the plurality of right intake ports 33-2, and are disposed in the vicinity of the upstream end of the central belt medium contact portion 27. . The upstream ends of the plurality of central intake ports 34 are arranged at the same position in the document conveying direction 20 as the upstream ends of the plurality of left intake ports 33-1 or the plurality of right intake ports 33-2. The downstream ends of the plurality of central intake ports 34 are disposed upstream of the downstream ends of the plurality of left intake ports 33-1 or the plurality of right intake ports 33-2. That is, the width of the plurality of central intake ports 34 in the document conveyance direction 20 is shorter than the width of the plurality of left intake ports 33-1 or the plurality of right intake ports 33-2 in the document conveyance direction 20.

The plurality of left downstream intake ports 35-1 are arranged on the downstream side of the plurality of left intake ports 33-1 and in the vicinity of the portion from the middle plate to the upstream end of the left belt medium contact portion 26-1. Is arranged. The plurality of right downstream intake ports 35-2 are disposed on the downstream side of the plurality of right intake ports 33-2, and are located in the vicinity of the portion from the middle plate to the upstream end of the right belt medium contact portion 26-2. Is arranged.

FIG. 4 is a side sectional view showing the upper conveyance guide 32, and is a sectional view taken along line AA in FIG. As shown in FIG. 4, the plurality of right downstream intake ports 35-2 are formed in a portion of the upper transport guide 32 that faces the transport path lower surface 11. The plurality of right intake ports 33-2 are formed in portions of the upper transport guide 32 that do not face the transport path lower surface 11. The plurality of left downstream intake ports 35-1 are formed in a portion of the upper conveyance guide 32 that faces the conveyance path lower surface 11 in the same manner as the plurality of right downstream intake ports 35-2. The plurality of left intake ports 33-1 are formed in a portion of the upper conveyance guide 32 that does not face the conveyance path lower surface 11 in the same manner as the plurality of right intake ports 33-2.

The suction unit 31 includes a plurality of blowers as shown in FIG. FIG. 5 is a bottom view showing a plurality of blowers. The plurality of blowers are arranged above the upper conveyance guide 32 so that the upper conveyance guide 32 is arranged between the plurality of blowers and the conveyance path 14. The plurality of blowers include a left side transport blower 41-1, a right side transport blower 41-2, a central transport blower 42, a left side downstream transport blower 43-1 and a right side downstream transport blower 43-2.

The left transport blower 41-1 is disposed above the plurality of left intake ports 33-1. The left transport blower 41-1 sucks air from the space formed between the medium placed on the document table 2 and the left belt medium contact part 26-1 via the plurality of left intake ports 33-1. To do. The right transport blower 41-2 is disposed above the plurality of right intake ports 33-2. The right transport blower 41-2 sucks air from the space formed between the medium placed on the document table 2 and the right belt medium contact portion 26-2 via the plurality of right intake ports 33-2. To do. The central transfer blower 42 is disposed above the plurality of central intake ports 34. The central transport blower 42 sucks air from the space formed between the medium placed on the document table 2 and the central belt medium contact portion 27 via the plurality of central air inlets 34.

The left downstream conveyance blower 43-1 is disposed above the plurality of left downstream intake ports 35-1. The left downstream conveyance blower 43-1 is a space formed between the medium placed on the document table 2 and the left belt medium contact portion 26-1 via a plurality of left downstream intake ports 35-1. Aspirate air from. The right downstream transport blower 43-2 is disposed above the plurality of right downstream intake ports 35-2. The right downstream transport blower 43-2 is a space formed between the medium placed on the document table 2 and the right belt medium contact portion 26-2 via the plurality of right downstream intake ports 35-2. Aspirate air from.

FIG. 6 is a front view showing the suction force that the suction unit 31 draws the medium placed on the document table 2. As shown in FIG. 6, the left transport blower 41-1 sucks air through the plurality of left intake ports 33-1 to thereby form the left side of the medium 50 placed on the document table 2. The front end region 52-1 is pulled toward the upper conveyance guide 32 with the left suction force F1 per unit area. The left tip region 52-1 indicates a part of the tip region 51 facing the upper conveyance guide 32 in the medium 50, and indicates a region facing the left belt medium contact portion 26-1 in the tip region 51. Yes.

The right transport blower 41-2 sucks air through the plurality of right air inlets 33-2, so that the upper transport guide 32 moves through the right tip region 52-2 of the medium 50 with the right suction force F2 per unit area. Attract to. The right tip region 52-2 indicates a part of the tip region 51 facing the upper conveyance guide 32 in the medium 50, and indicates a region facing the right belt medium contact portion 26-2 in the tip region 51. Yes. The right suction force F2 is substantially equal to the left suction force F1.

The central transport blower 42 sucks air through the plurality of central air inlets 34 to draw the central tip region 53 of the medium 50 toward the upper transport guide 32 with a central suction force F3 per unit area. The central front end region 53 indicates a part of the front end region 51 of the medium 50 that faces the upper conveyance guide 32, and indicates a region of the front end region 51 that faces the central belt medium contact portion 27. The central suction force F3 is smaller than the left suction force F1 and smaller than the right suction force F2.

FIG. 7 is a front view showing a suction force necessary for bringing the single medium 54 placed on the document table 2 into contact with the plurality of feeding belts 15. The single-sheet medium 54 is formed from a single paper document. As shown in FIG. 7, the single-sheet medium 54 has the left tip region 52-1 drawn to the upper conveyance guide 32 by the suction force F4 per unit area, so that the left tip region 52-1 is moved to the left belt medium. The contact portion 26-1 can be contacted. In the single-sheet medium 54, the right tip region 52-2 may be brought into contact with the right belt medium contact portion 26-2 by the right tip region 52-2 being attracted to the upper conveyance guide 32 by the suction force F4 per unit area. it can. In the single-sheet medium 54, the central front end region 53 can be brought into contact with the central belt medium contact portion 27 by the central front end region 53 being attracted to the upper transport guide 32 by the suction force F4 per unit area.

FIG. 8 is a front view showing a suction force required when the left end binding medium 55 placed on the document table 2 is brought into contact with the plurality of feeding belts 15. As shown in FIG. 8, the left end binding medium 55 is formed by binding the left end region 52-1 of a plurality of paper documents with staples 56. In the left end binding medium 55, the left end region 52-1 is brought into contact with the left belt medium contact portion 26-1 by the left end region 52-1 being attracted to the upper conveyance guide 32 by the suction force F5 per unit area. it can. The suction force F5 is expressed by the following equation using the number n of bindings, the width α, and the width β:
F5 = {(2α + β) ÷ α × (n−1) +1} × F4
It is expressed by The number of bindings n indicates the number of paper documents included in the left-end binding medium 55. The width α indicates the width of the left tip region 52-1 and the width of the right tip region 52-2. The width β indicates the width of the central tip region 53. For example, the suction force F5 is 41 times the suction force F4 when the number of bindings n is 5, the width α is 30 mm, and the width β is 240 mm.

In the left end binding medium 55, the right end region 52-2 is brought into contact with the right belt medium contact portion 26-2 by the right end region 52-2 being attracted to the upper conveyance guide 32 by the suction force F6 per unit area. it can. The suction force F6 is equal to the suction force F4. The center end region 53 of the left end binding medium 55 can be brought into contact with the central belt medium contact portion 27 by the center end region 53 being attracted to the upper conveyance guide 32 by the suction force F6 per unit area.

The right end bound medium in which the right end area 52-2 of the plurality of paper documents is stapled is similar to the left end binding medium 55, and the end area 51 is divided into the left belt medium contact area 26-1 and the right belt medium contact area. 26-2 and the central belt media contact portion 27 can be contacted. In other words, the right edge region 52-2 is brought into contact with the right belt medium contact portion 26-2 by the right edge region 52-2 being attracted to the upper conveyance guide 32 by the suction force F5 per unit area. Can do. In the right end binding medium, the left end region 52-1 can be brought into contact with the left belt medium contact portion 26-1 by the left end region 52-1 being attracted to the upper conveyance guide 32 by the suction force F6 per unit area. . The right end binding medium can be brought into contact with the central belt medium contact portion 27 by the central front end region 53 being attracted to the upper conveyance guide 32 by the suction force F6 per unit area.

FIG. 9 is a front view showing the suction force required when the center binding medium 57 placed on the document table 2 is brought into contact with the plurality of feeding belts 15. As shown in FIG. 9, the center binding medium 57 is formed by binding the center front end region 53 of a plurality of paper documents with staples 58. The central binding medium 57 can be brought into contact with the central belt medium contact portion 27 by pulling the central front end area 53 toward the upper conveyance guide 32 with a suction force F7 per unit area. The suction force F7 is expressed by the following formula using the number n of bindings, the width α, and the width β:
F7 = {(2α + β) ÷ β × (n−1) +1} × F4
It is expressed by For example, the suction force F7 is six times the suction force F4 when the number of bindings n is 5, the width α is 30 mm, and the width β is 240 mm.

In the center binding medium 57, the left end region 52-1 is brought into contact with the left belt medium contact portion 26-1 by the left end region 52-1 being attracted to the upper conveyance guide 32 by the suction force F8 per unit area. it can. The suction force F8 is equal to the suction force F4. In the center binding medium 57, the right tip region 52-2 is brought into contact with the right belt medium contact portion 26-2 by the right tip region 52-2 being attracted to the upper conveyance guide 32 by the suction force F8 per unit area. it can.

The left suction force F1 and the right suction force F2 are equal to or greater than the suction force F5. The central suction force F3 is equal to or greater than the suction force F7. For this reason, the suction unit 31 can bring the left end binding medium 55 into contact with all of the plurality of feeding belts 15, can bring the center binding medium 57 into contact with all of the plurality of feeding belts 15, and further, the right end binding medium 15. The medium can be brought into contact with all of the plurality of feeding belts 15. That is, the suction unit 31 can draw the binding medium on which n paper documents are bound to the upper conveyance guide 32 and bring it into contact with the plurality of feeding belts 15.

The medium conveyance device 1 is capable of bringing the binding medium, on which n paper documents are bound, to the upper conveyance guide 32 and bringing it into contact with the plurality of feeding belts 15 when the central suction force F3 is equal to or greater than the left suction force F1. it can. The medium conveyance device 1 can reduce power consumption compared to other medium conveyance devices in which the central suction force F3 is equal to or greater than the left suction force F1 because the central suction force F3 is smaller than the left suction force F1. .

Further, the left downstream conveyance blower 43-1 sucks air through the plurality of left downstream intake ports 35-1, so that the medium is brought into contact with the left belt medium contact portion 26-1. The upper conveyance guide 32 is drawn. The suction force per unit area by which the left downstream transport blower 43-1 attracts the medium to the upper transport guide 32 is smaller than the left suction force F1 and is approximately equal to the central suction force F3. The right downstream conveyance blower 43-2 sucks air through the plurality of right downstream intake ports 35-2, thereby conveying the medium upward so that the medium contacts the right belt medium contact portion 26-2. Pull to guide 32. The suction force per unit area by which the right downstream transport blower 43-2 draws the medium to the upper transport guide 32 is smaller than the right suction force F2 and substantially equal to the central suction force F3.

FIG. 10 is a block diagram showing the binding member removing apparatus 10. As illustrated in FIG. 10, the binding member removing device 10 further includes a belt driving unit 61, a roller driving unit 62, and a control unit 63. The belt driving unit 61 is controlled by the control unit 63 so that the plurality of feeding belts 15 move, that is, the medium in contact with the plurality of feeding belts 15 moves along the conveyance path 14 in the document conveyance direction 20. The plurality of fixed pulleys 16 are rotated so as to move. The roller driving unit 62 is controlled by the control unit 63 so that the medium in contact with the pair of first conveyance rollers 18 moves in the document conveyance direction 20 in the document conveyance direction 20 so that the medium is in contact with the pair of first conveyance rollers. 18 is rotated. The roller driving unit 62 is further controlled by the control unit 63 so that the medium in contact with the pair of second conveyance rollers 19 further moves the conveyance path 14 in the document conveyance direction 20. The conveyance roller 19 is rotated. The roller driving unit 62 is further controlled by the control unit 63 so that the medium in contact with the pair of third conveyance rollers further moves in the document conveyance direction 20 so that the medium in contact with the pair of third conveyance rollers moves. Rotate the roller.

The control unit 63 is a computer, and includes a CPU (Central Processing Unit) 64, a storage device 65, and an input / output device 66. The CPU 64 executes information processing by executing a computer program installed in the control unit 63 and controls the storage device 65 and the input / output device 66. The CPU 64 further executes the computer program, thereby further causing the left conveyance blower 41-1, the right conveyance blower 41-2, the central conveyance blower 42, the left downstream conveyance blower 43-1 and the right downstream conveyance blower 43-2. And control. The CPU 64 further controls the left side blower 6-1, right side blower 6-2, and separation blower 17 by executing the computer program. The CPU 64 further controls the left suction detection sensor 28-1, the right suction detection sensor 28-2, the central suction detection sensor 29, and the document detection sensor 30 by executing the computer program. The CPU 64 further controls the belt driving unit 61 and the roller driving unit 62 by executing the computer program. The CPU 64 further controls the staple detection unit 21 and the staple removal unit 22 by executing the computer program.

The storage device 65 records the computer program and records information used by the CPU 64. As the storage device 65, for example, a memory such as a RAM / ROM, a fixed disk device such as a hard disk, an SSD (Solid State Drive), an optical disk, or the like can be used. The input / output device 66 is, for example, a touch panel, and outputs information generated by being operated by the user to the CPU 64 and outputs the information generated by the CPU 64 so that the user can recognize it.

Note that the CPU 64 may be composed of another tangible controller that controls the control unit 63 in an integrated manner. Examples of the tangible controller include DSP (Digital Signal Processor), LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit) or FPGA (Field-Programmable).

FIG. 11 is a flowchart showing the operation of the binding member removing apparatus 10. When the user intends to remove staples from a plurality of media using the binding member removing apparatus 10, the user places the plurality of media on the document table 2 and operates the input / output device 66 to operate the binding member removing apparatus 10. Start up. When the binding member removing apparatus 10 is activated, the control unit 63 performs the left conveyance blower 41-1, the central conveyance blower 42, the left side blower 6-1, and the right side blower 6 as shown in FIG. -2 and the separation blower 17 are driven. At this time, the control unit 63 controls the left transport blower 41-1 so that the left front end region 52-1 of the medium is attracted to the upper transport guide 32 by the left suction force F1. Air is sucked through the mouth 33-1. The control unit 63 controls the central transport blower 42 so that the central front end region 53 of the medium is attracted to the upper transport guide 32 by the central suction force F3 so as to draw air through the plurality of central intake ports 34. Suction. The control unit 63 controls the roller driving unit 62 when the binding member removing device 10 is activated, so that the pair of first conveyance rollers 18, the pair of second conveyance rollers 19, and the pair of third conveyance rollers Is rotated (step S1).

The plurality of media placed on the document table 2 are driven by the left side blower 6-1, the right side blower 6-2, and the separation blower 17 so that air is blown onto the end surfaces to form a plurality of media. Air enters between multiple paper documents. The plurality of paper documents are easily separated from each other when air enters between the plurality of paper documents. One paper document arranged at the top of the plurality of paper documents is driven by the left conveying blower 41-1 and the central conveying blower 42, so that the left leading edge region 52-1 and the central leading edge region 53 are driven. Are attracted to the upper conveyance guide 32.

The control unit 63 waits for a predetermined time after the right conveyance blower 41-2, the central conveyance blower 42, the left side blower 6-1, the right side blower 6-2, and the separation blower 17 are driven (step S2). After waiting for a predetermined time, the control unit 63 controls the right transport blower 41-2 so that the right tip region 52-2 of the medium is attracted to the upper transport guide 32 by the right suction force F2. Air is sucked through the plurality of right side intake ports 33-2 (step S3). In the uppermost sheet, the right conveyance area 42-2 is drawn to the upper conveyance guide 32 by driving the right conveyance blower 41-2.

The control unit 63 controls the left suction detection sensor 28-1, the right suction detection sensor 28-2, and the central suction detection sensor 29 after the right transport blower 41-2 is driven, so that the plurality of feeding belts 15 are controlled. It is detected whether or not the medium has contacted the medium (step S4). When it is detected that the plurality of feeding belts 15 are not in contact with the medium (No in step S4), the control unit 63 uses the air around the feeding belt that is not in contact with the medium among the plurality of blowers. The output of the blower to be sucked is increased (step S5).

That is, when it is detected that the left belt medium contact portion 26-1 is not in contact with the medium, the control unit 63 controls the left conveying blower 41-1 so that the plurality of left intake ports 33-1 are opened. The amount of air sucked per unit time is increased by a predetermined amount. The suction force that draws the left end area 52-1 of the uppermost sheet document to the upper transport guide 32 is sucked per unit time through the plurality of left intake ports 33-1. It increases as the amount of air increases.

When it is detected that the right belt medium contact portion 26-2 is not in contact with the medium, the control unit 63 controls the right transport blower 41-2 to pass through the plurality of right intake ports 33-2. The amount of air sucked per unit time is increased by a predetermined amount. The suction force by which the right front end region 52-2 of the one paper document arranged at the top is attracted to the upper transport guide 32 is sucked per unit time through the plurality of right intake ports 33-2. It increases as the amount of air increases.

When it is detected that the central belt medium contact portion 27 is not in contact with the medium, the control unit 63 controls the central conveyance blower 42 so as to be sucked per unit time through the plurality of central air inlets 34. The amount of air to be increased is increased by a predetermined amount. The suction force at which the central front end region 53 of the one paper document arranged at the top is attracted to the upper transport guide 32 is the amount of air sucked per unit time through the plurality of central air inlets 34. It increases by increasing.

The control unit 63 waits for a predetermined time after step S5 is executed. After waiting for a predetermined time, the control unit 63 controls the left suction detection sensor 28-1, the right suction detection sensor 28-2, and the central suction detection sensor 29, so that the plurality of feeding belts 15 come into contact with the medium. It is detected again (step S6). When it is detected that all of the plurality of feeding belts 15 are not in contact with the medium (No in step S6), the control unit 63 determines that the plurality of blowers, the left side blower 6-1 and the right side blower 6-2 are not in contact with the medium. Then, the separation blower 17 and the roller driving unit 62 are stopped (step S11). When it is detected that any of the plurality of feeding belts 15 is in contact with the medium (step S6, Yes), the control unit 63 repeatedly executes the processes of steps S4 to S6.

The control unit 63 detects that all of the left belt medium contact part 26-1, the right belt medium contact part 26-2, and the central belt medium contact part 27 are in contact with the medium (step S4, Yes), the process of step S7 is executed. That is, the control unit 63 moves the plurality of feeding belts 15 by controlling the belt driving unit 61. One paper document that is in contact with the plurality of feeding belts 15 is conveyed in the document conveying direction 20 through the conveying path 14 as the plurality of feeding belts 15 are moved. The paper document bound together with the single paper document is conveyed in the original conveyance direction 20 together with the single paper document by conveying the single paper document in the original conveyance direction 20. When the paper document bound together with the one paper document is conveyed in the document conveying direction 20, the end surface of the paper document comes into contact with the left side guide 3-1 and the right side guide 3-2. Aligned to a sheet of paper document. That is, the binding medium including the single paper document is transported in the document transport direction 20 by transporting the single paper document in the document transport direction 20.

The control unit 63 detects whether or not the medium is being conveyed to the pair of first conveying rollers 18 by controlling the document detection sensor 30 (step S8). The control unit 63 stops the movement of the plurality of feeding belts 15 by controlling the belt driving unit 61 when the medium is being conveyed to the pair of first conveying rollers 18. When the medium is being transported to the pair of first transport rollers 18, the control unit 63 further controls the right transport blower 41-2 to suck air through the plurality of right intake ports 33-2. Stop being done. When the medium is being transported to the pair of first transport rollers 18, the control unit 63 further controls the left transport blower 41-1 so that the medium is attracted to the upper transport guide 32 by the left suction force F1. As described above, air is sucked through the plurality of left intake ports 33-1. When the medium is being transported to the pair of first transport rollers 18, the control unit 63 further controls the central transport blower 42 so that the medium is attracted to the upper transport guide 32 by the central suction force F3. Then, air is sucked through the plurality of central air inlets 34 (step S9). The medium conveyed by the pair of first conveying rollers 18 moves in the document conveying direction 20 while sliding on the plurality of feeding belts 15 when the plurality of feeding belts 15 are stopped.

The control unit 63 controls the document detection sensor 30 so that the medium is conveyed to the pair of first conveyance rollers 18 even after it is detected that the medium is conveyed to the pair of first conveyance rollers 18. It continues to detect whether or not (step S10). After detecting that the medium is no longer transported to the pair of first transport rollers 18, the control unit 63 performs the processes subsequent to step S <b> 2 again.

The medium conveyed by the pair of first conveyance rollers 18 passes through the staple detection unit 21. The control unit 63 controls the staple detection unit 21 to detect whether or not the medium passing through the staple detection unit 21 is a binding medium bound by staples. When the medium passing through the staple detection unit 21 is a binding medium, the control unit 63 controls the staple detection unit 21 to detect an area in which the staple is arranged in the binding medium. The medium that has passed through the staple detection unit 21 is supplied to the pair of second transport rollers 19. The medium supplied to the pair of second conveyance rollers 19 is supplied to the staple removal unit 22 and passes through the staple removal unit 22 when the pair of second conveyance rollers 19 rotates. When the medium that has passed through the staple detection unit 21 is a binding medium, the control unit 63 controls the staple removal unit 22 to remove staples from the binding medium that has passed through the staple removal unit 22. The medium that has passed through the staple removing unit 22 is supplied to a pair of third transport rollers. The medium supplied to the pair of third transport rollers is discharged to the outside of the binding member removing device 10 by the rotation of the pair of third transport rollers.

FIG. 12 is a graph showing a change in suction force by which the medium is attracted to the upper transport guide 32. A broken line 71 indicates a change in the central suction force at which the central front end region 53 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 71 indicates that the central suction force changes from 0 to the central suction force F3 at time t1 when the process of step S1 is executed. A broken line 72 indicates a change in the left suction force in which the left end region 52-1 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 72 indicates that the left suction force changes from 0 to the left suction force F1 at time t1. A broken line 73 indicates a change in the right suction force in which the right end region 52-2 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 73 indicates that the right suction force changes from 0 to the right suction force F2 at time t2 when the process of step S3 is executed.

FIG. 13 is a front view showing the state of the medium 74 before the process of step S1 is executed. As shown in FIG. 13, the medium 74 placed on the document table 2 is not attracted to the upper conveyance guide 32 before the time t1 when the process of step S1 is executed, and the leading end region 51 is not drawn. Are arranged so as not to contact the plurality of feeding belts 15.

FIG. 14 is a front view showing the state of the medium 74 after the process of step S1 is executed. In the medium 74, after the time t1 when the process of step S1 is executed, the left tip region 52-1 is attracted to the upper transport guide 32 by the left suction force F1, and the center tip region 53 is pulled by the upper suction force F3. Attracted to 32. Due to the fact that the left suction force F1 is larger than the center suction force F3, the medium 74 has a left tip region 52− before the center tip region 53 contacts the central belt medium contact portion 27 as shown in FIG. 1 contacts the left belt media contact area 26-1.

FIG. 15 is a front view showing a state of the medium 74 after the left end region 52-1 contacts the plurality of feeding belts 15. FIG. The medium 74 has the central tip region 53 drawn to the upper conveyance guide 32 by the central suction force F3, so that the central tip region 53 is brought into contact with the left belt medium contact portion 26-1 after the left tip region 52-1 contacts the left belt medium contact portion 26-1. Contacts the central belt media contact site 27.

FIG. 16 is a front view showing the state of the medium 74 after the process of step S3 is executed. The medium 74 is drawn to the upper conveyance guide 32 by the right suction force F2 after the time t2 when the process of step S3 is executed. In the medium 74, the right front end region 52-2 is attracted to the upper transport guide 32 by the right suction force F2, so that the right front end region 52-2 is moved to the right belt medium contact portion 26- as shown in FIG. 2 is contacted.

According to the flow of FIG. 11, the suction unit 31 does not first draw the right tip region 52-2 to the upper transport guide 32, but moves the left tip region 52-1 and the center tip region 53 to the upper transport guide 32, respectively. Draw. Therefore, in the medium 74, first, the right tip region 52-2 does not contact the right belt medium contact portion 26-2, and the left tip region 52-1 and the central tip region 53 are left belt contact portion 26-1. And the central belt medium contact portion 27 respectively. The suction unit 31 moves the right tip region 52-2 to the upper conveyance guide after the left tip region 52-1 and the center tip region 53 contact the left belt medium contact portion 26-1 and the central belt medium contact portion 27, respectively. Attract to 32. Therefore, the medium 74 can appropriately come into contact with the left belt medium contact part 26-1 and the right belt medium contact part 26-2 and the central belt medium contact part 27 in the entire front end region 51.

FIG. 17 is a graph showing a comparative example of a change in suction force by which the medium is attracted to the upper transport guide 32. In the comparative example, the left transport blower 41-1, the right transport blower 41-2, and the central transport blower 42 are driven at time t3. A polygonal line 101 indicates a change in the central suction force at which the central front end region 53 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 101 indicates that the central suction force changes from 0 to the central suction force F3 at time t3 as shown in FIG. A broken line 102 indicates a change in the left suction force in which the left end region 52-1 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 102 indicates that the left suction force changes from 0 to the left suction force F1 at time t3. A broken line 103 indicates a change in the right suction force by which the right front end region 52-2 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 103 indicates that the right suction force changes from 0 to the right suction force F2 at time t3.

FIG. 18 is a front view showing a state of the medium 105 sucked by the change in suction force of the comparative example. In the medium 105, the left suction force F1 and the right suction force F2 are larger than the central suction force F3, so that the front end region 51 has a left belt medium contact portion 26-1, a right belt medium contact portion 26-2, and a central belt medium contact. The part 27 may not be properly contacted. In other words, the medium 105 has the left tip region 52-1 and the right tip region 52-2, the left belt medium contact portion 26-1, and the right belt medium before the center tip region 53 contacts the center belt medium contact portion 27. Contact with the contact site 26-2 may occur. As shown in FIG. 18, the medium 105 is brought into contact with the left belt medium contact part 26-1, the right belt medium contact part 26-2 and the central belt medium contact part 27 in this manner. The central tip region 53 may be bent. When the medium 105 is transported along the transport path 14 in the document transport direction 20 with the central front end region 53 bent, the binding member removing device 10 is jammed, and the medium 105 is damaged or the device breaks down. Sometimes.

The medium transport device 1 prevents the central tip region 53 from bending by pulling the left tip region 52-1, the right tip region 52-2, and the center tip region 53 to the upper transport guide 32 with a time difference. be able to. The medium conveyance device 1 can prevent the jam at the center tip region 53 from being bent, and can prevent damage to the medium to be conveyed and failure of the device.

FIG. 19 is a front view showing a state of the plurality of feeding belts 15 and the plurality of intake ports when the medium 81 comes into contact with the plurality of feeding belts 15. After the medium 81 contacts the plurality of feeding belts 15 and before the plurality of feeding belts 15 are driven, the medium 81 comes into contact with the plurality of feeding belts 15 as shown in FIG. A plurality of central air inlets 34 are blocked. That is, the plurality of central air inlets 34 are formed so that the medium drawn to the upper transport guide 32 closes the plurality of central air inlets 34 before the plurality of feeding belts 15 are driven. The suction part 31 has a plurality of central air inlets 34 formed in this manner, so that when the medium 81 is in contact with the central belt medium contact part 27, the air blown by the separation blower 17 has a plurality of central parts. Suction through the intake port 34 can be prevented. The suction portion 31 prevents the air blown by the separation blower 17 from being sucked through the plurality of central air inlets 34, thereby bringing the leading end region 51 of the medium 81 into strong contact with the central belt medium contact portion 27. Can do. The suction unit 31 can prevent the front end region 51 from moving away from the central belt medium contact portion 27 because the front end region 51 of the medium 81 is in strong contact with the central belt medium contact portion 27.

At this time, the medium 81 further blocks a part of the plurality of left intake ports 33-1 so that a part of the plurality of left intake ports 33-1 is not blocked. A part of the plurality of right air inlets 33-2 is blocked so that a part of the air intake 33-2 is not blocked. Further, in the suction part 31, the left suction force F1 and the right suction force F2 are larger than the central suction force F3, so that the leading end region 51 of the medium 81 has the left belt medium contact part 26-1 and the right belt medium contact part 26-. 2 can be prevented from leaving.

FIG. 20 is a front view showing a state of the plurality of feeding belts 15 and the plurality of intake ports after the plurality of feeding belts 15 are driven. As shown in FIG. 20, the medium 81 does not block the plurality of left downstream intake ports 35-1 and the plurality of right downstream intake ports 35-2, and has a plurality of left intake ports. It is arranged so as to block 33-1 and the plurality of right side intake ports 33-2.

The suction unit 31 prevents the air blown by the separation blower 17 from being sucked through the left intake ports 33-1 by the plurality of left intake ports 33-1 being blocked by the medium 81. Can do. The suction unit 31 prevents the air blown by the separation blower 17 from being sucked through the plurality of left side intake ports 33-1 to thereby move the leading end region 51 of the medium 81 to the left belt medium contact part 26-1. Can make strong contact. The suction unit 31 can prevent the front end region 51 from separating from the left belt medium contact portion 26-1 because the front end region 51 of the medium 81 is in strong contact with the left belt medium contact portion 26-1. .

The suction unit 31 prevents the air blown by the separation blower 17 from being sucked through the plurality of right intake ports 33-2 by the plurality of right intake ports 33-2 being blocked by the medium 81. Can do. The suction unit 31 prevents the air blown by the separation blower 17 from being sucked through the plurality of right intake ports 33-2, thereby moving the tip region 51 of the medium 81 to the right belt medium contact part 26-2. Can make strong contact. The suction unit 31 can prevent the front end region 51 from separating from the right belt medium contact portion 26-2 because the front end region 51 of the medium 81 is in strong contact with the right belt medium contact portion 26-2. .

If the medium 81 is separated from the left belt medium contact part 26-1 and the right belt medium contact part 26-2 in this state, the end of the medium 81 may be buckled. The suction unit 31 can prevent the end from buckling by strongly contacting the front end region 51 of the medium 81 with the left belt medium contact part 26-1 and the right belt medium contact part 26-2. . If the medium 81 is separated from the left belt medium contact portion 26-1, the right belt medium contact portion 26-2, and the central belt medium contact portion 27 in this state, the medium 81 may fall to the document table 2. The suction unit 31 makes the medium 81 fall down to the document table 2 by strongly contacting the front end region 51 of the medium 81 with the left belt medium contact part 26-1 and the right belt medium contact part 26-2. Can be prevented.

FIG. 21 is a front view showing a state of the plurality of feeding belts 15 and the plurality of intake ports after the plurality of feeding belts 15 are further driven. As shown in FIG. 21, the medium 81 has a plurality of left sides so as not to block all of the plurality of left downstream intake ports 35-1 and the plurality of right downstream intake ports 35-2. Only a part of the downstream side intake port 35-1 and a part of the plurality of right side downstream side intake ports 35-2 are closed. At this time, the medium 81 is attracted to the upper conveyance guide 32 by sucking air through the plurality of left downstream intake ports 35-1 and the plurality of right downstream intake ports 35-2. It has been. At this time, the left upstream suction force attracted to the upper conveyance guide 32 by sucking air through the plurality of left downstream suction ports 35-1 is smaller than the left suction force F1. Therefore, in the medium 81, the tip region 51 is likely to be separated from the left belt medium contact portion 26-1 as compared with the state of FIG. Further, the right upstream suction force attracted to the upper conveyance guide 32 by sucking air through the plurality of right downstream suction ports 35-2 is smaller than the right suction force F2. Therefore, in the medium 81, the tip end region 51 is likely to be separated from the right belt medium contact portion 26-2 as compared with the state of FIG.

In the medium 81, the plurality of left downstream intake ports 35-1 and the plurality of right downstream intake ports 35-2 face the conveyance path lower surface 11, so that the tip region 51 is separated from the plurality of feeding belts 15. Even in the case of being transported, it is guided by the transport path lower surface 11 and can be transported appropriately along the transport path 14. The medium conveying apparatus 1 can prevent buckling of the end of the medium 81 by appropriately conveying the medium 81 even when the leading end region 51 is separated from the plurality of feeding belts 15. The medium conveying apparatus 1 can prevent the occurrence of a jam by preventing the end of the medium 81 from buckling.

FIG. 22 is a front view showing a state of the plurality of feeding belts 15 and the plurality of intake ports after the plurality of feeding belts 15 are further driven. As shown in FIG. 22, the medium 81 is arranged so as to block all of the plurality of left downstream intake ports 35-1 and all of the plurality of right downstream intake ports 35-2. For this reason, the medium 81 can strongly contact the front end region 51 with the left belt medium contact part 26-1 and the right belt medium contact part 26-2 in the state of FIG. In the medium conveying apparatus 1, the leading end region 51 is in strong contact with the plurality of feeding belts 15, so that the leading end region 51 comes into contact with the pair of first conveying rollers 18 when the plurality of feeding belts 15 are driven. In addition, the medium 81 can be appropriately conveyed. The pair of first conveying rollers 18 can appropriately convey the medium 81 when the plurality of feeding belts 15 bring the medium 81 into contact with the pair of first conveying rollers 18.

FIG. 23 is a side sectional view showing a state of the medium 85 before air is sucked. The medium 85 is arranged at the top of the plurality of media placed on the document table 2 as shown in FIG. 23 before the suction unit 31 sucks air. At this time, the leading end region 51 of the medium 85 faces the upper conveyance guide 32 and faces the plurality of feeding belts 15.

FIG. 24 is a side sectional view showing a state of the medium 85 after air is sucked. As the medium 85 sucks air by the suction unit 31, the tip region 51 is drawn toward the upper conveyance guide 32 as shown in FIG. 24, and the tip region 51 comes into contact with the plurality of feeding belts 15.

FIG. 25 is a side sectional view showing the state of the medium 85 after the plurality of feeding belts 15 have moved. The medium 85 is transported in the document transport direction 20 as shown in FIG. 25 by the movement of the plurality of feeding belts 15. The medium 85 is transported in the document transport direction 20, thereby contacting the pair of first transport rollers 18 and transported by the pair of first transport rollers 18. The plurality of feeding belts 15 are stopped when it is detected that the medium 85 is conveyed by the pair of first conveying rollers 18.

FIG. 26 is a side cross-sectional view showing a state of the next medium 86 after the medium 85 is conveyed until it is separated from the plurality of feeding belts 15. When the medium 85 is transported along the transport path 14 in the document transport direction 20 by the pair of first transport rollers 18, as shown in FIG. 26, a part of the upper transport guide 32 is exposed and a plurality of left-hand sides are left. The intake port 33-1, the plurality of right-side intake ports 33-2, and the plurality of central intake ports 34 are opened. When the next medium 86 arranged under the medium 85 on the document table 2 is opened, the plurality of left intake ports 33-1, the plurality of right intake ports 33-2, and the plurality of central intake ports 34 are opened. The suction part 31 is attracted to the upper conveyance guide 32 by sucking air. The medium 86 is brought into contact with the plurality of feeding belts 15 by being attracted to the upper conveyance guide 32.

Even when the medium 86 contacts the plurality of feeding belts 15, the medium 86 is not conveyed in the document conveying direction 20 because the plurality of feeding belts 15 are not moved. Therefore, the medium 86 is appropriately separated from the medium 85 without being conveyed in the document conveying direction 20 together with the medium 85 even when the medium 86 is in contact with the medium 85 when contacting the plurality of feeding belts 15. The medium conveying apparatus 1 can appropriately convey the medium by separating the medium 86 from the medium 85. That is, the medium transport apparatus 1 can appropriately separate the plurality of media placed on the document table 2 and can transport the plurality of media separately.

[Effect of binding member removing apparatus 10]
The medium conveyance device 1 according to the embodiment includes a plurality of feeding belts 15, a suction unit 31, and a belt driving unit 61. The suction unit 31 sucks air disposed in a space formed between the medium placed on the document table 2 and the plurality of feeding belts 15 through the plurality of air inlets. The belt driving unit 61 moves the plurality of feeding belts 15 so that the medium is fed when the medium is in contact with the plurality of feeding belts 15. The suction unit 31 attracts air to the plurality of feeding belts 15 by the left suction force F1 by sucking air through the plurality of left suction ports 33-1. The suction unit 31 further draws air to the plurality of feeding belts 15 with the right suction force F2 by sucking air through the plurality of right suction ports 33-2. The suction unit 31 further draws the medium to the plurality of feeding belts 15 with the central suction force F3 by sucking air through the plurality of central suction ports 34. At this time, the left suction force F1 and the right suction force F2 are larger than the central suction force F3.

Such a medium transport device 1 appropriately draws the left leading edge region 52-1 by attracting with the left suction force F1 when staples for binding a plurality of paper documents are arranged in the left leading edge region 52-1 of the binding medium. The plurality of feeding belts 15 can be brought into contact with each other. Further, when the staple is placed in the right end region 52-2 of the binding medium, the medium conveying apparatus 1 draws the right end region 52-2 appropriately on the plurality of feeding belts 15 by drawing it with the right suction force F2. Can be contacted. Further, when the staple is disposed in the central front end region 53 of the binding medium, the medium transporting apparatus 1 draws the central front end region 53 appropriately by pulling it with a central suction force F3 smaller than the left suction force F1 and the right suction force F2. The plurality of feeding belts 15 can be brought into contact with each other. The medium transport apparatus 1 is compared with other medium transport apparatuses that suck air so that the front end region 51 of the medium is uniformly attracted with a sufficiently large suction force (for example, the left suction force F1 or the right suction force F2). Power consumption can be reduced.

In addition, the plurality of central intake ports 34 of the medium conveyance device 1 of the embodiment are disposed between the plurality of left intake ports 33-1 and the plurality of right intake ports 33-2. By being sucked in this way, the medium conveying apparatus 1 appropriately binds the binding medium in which the left end region 52-1 is bound and the binding medium in which the right end region 52-2 is bound to the plurality of feeding belts 15. The medium can be properly fed out.

By the way, the medium conveying apparatus 1 draws the medium to the plurality of feeding belts 15 with the central suction force F3 through one of the plurality of left side intake ports 33-1 and the plurality of right side intake ports 33-2. Air may be sucked. The medium conveying device 1 can appropriately feed out the binding medium by placing the binding medium on the document table 2 so that the staple is not disposed in the vicinity of one of the air inlets, thereby reducing power consumption. Can do.

The medium conveyance device 1 of the embodiment further includes a left side suction detection sensor 28-1, a right side suction detection sensor 28-2, a central suction detection sensor 29, and a control unit 63. The left suction detection sensor 28-1, the right suction detection sensor 28-2, and the center suction detection sensor 29 detect whether or not the medium has contacted the plurality of feeding belts 15. The control unit 63 controls the belt driving unit 61 so that the medium is fed out by the plurality of feeding belts 15 when it is detected that the medium has contacted the plurality of feeding belts 15. The medium conveying apparatus 1 can appropriately feed one binding medium from a plurality of binding media by controlling the belt driving unit 61 in this way.

The suction unit 31 of the medium transport apparatus 1 according to the embodiment includes a left transport blower 41-1 that sucks air through the plurality of left intake ports 33-1 and an air through the plurality of right intake ports 33-2. And a right transport blower 41-2 for sucking the air. Such a medium transport apparatus 1 adjusts the left transport blower 41-1 and the right transport blower 41-2 to suck air through the plurality of left intake ports 33-1 and the plurality of right intake ports 33. -2 can be easily and separately adjusted.

Incidentally, the suction unit 31 of the medium transport apparatus 1 according to the embodiment includes the left transport blower 41-1 and the right transport blower 41-2. The air may be sucked through the right intake port 33-2. For example, the suction unit 31 includes a left shutter that opens and closes the plurality of left intake ports 33-1 and a right shutter that opens and closes the plurality of right intake ports 33-2. The control unit 63 controls the left shutter and the right shutter so that the suction of air through the plurality of left intake ports 33-1 and the suction of air through the plurality of right intake ports 33-2 are adjusted. . Even in such a case, the medium transport device 1 can prevent the center tip region 53 from being bent.

The medium conveyance device 1 according to the embodiment further includes a pair of first conveyance rollers 18, a roller driving unit 62, and a document detection sensor 30. The pair of first transport rollers 18 transports the medium by rotating. The roller driving unit 62 rotates the pair of first transport rollers 18. The document detection sensor 30 detects whether or not the medium is being transported by the pair of first transport rollers 18. The control unit 63 controls the belt driving unit 61 so that the plurality of feeding belts 15 do not move when it is detected that the medium is being conveyed by the pair of first conveying rollers 18.

Such a medium conveying apparatus 1 can appropriately feed one medium from a plurality of media by not moving the plurality of feeding belts 15 when the medium is conveyed by the pair of first conveying rollers 18. .

Further, the plurality of feeding belts 15 of the medium conveying apparatus 1 of the embodiment include a plurality of left feeding belts 24-1 and a plurality of right feeding belts 24-2. The part of the medium that contacts the pair of first conveying rollers 18 is a part of the medium that contacts the left feeding belt 24-1 and a part of the medium that contacts the right feeding belt 24-2. Between.

In such a medium transport apparatus 1, the pair of first transport rollers 18 are sandwiched between the left belt medium contact part 26-1 and the right belt medium contact part 26-2, thereby feeding a plurality of media. The belt 15 can be appropriately transferred to the pair of first conveying rollers 18. The medium conveying apparatus 1 can appropriately convey the medium by appropriately passing the medium from the plurality of feeding belts 15 to the pair of first conveying rollers 18.

In addition, the upper transport guide 32 of the medium transport apparatus 1 of the embodiment further includes a plurality of left downstream intake ports 35-1 and a plurality of right downstream intake ports 35-2. The plurality of left downstream intake ports 35-1 sucks air so that the medium is attracted to the vicinity of the pair of first conveying rollers 18 among the plurality of left feeding belts 24-1. The plurality of right downstream intake ports 35-2 sucks air so that the medium is attracted to the vicinity of the pair of first conveying rollers 18 among the plurality of right feeding belts 24-2. The left downstream suction force at which the medium is attracted to the upper transport guide 32 by sucking air through the plurality of left downstream intake ports 35-1 is smaller than the left suction force F1 and the right suction force F2. The right downstream suction force by which the medium is attracted to the upper transport guide 32 by the air being sucked through the plurality of right downstream suction ports 35-2 is smaller than the left suction force F1 and the right suction force F2.

Such a medium conveying apparatus 1 is configured such that air is sucked through the plurality of left downstream intake ports 35-1 and the plurality of right downstream intake ports 35-2, so that the medium is left on the left belt medium contact portion. 26-1 and the right belt medium contact portion 26-2 can be appropriately brought into contact with each other. The medium conveying apparatus 1 appropriately contacts the medium with the left belt medium contact portion 26-1 and the right belt medium contact portion 26-2, thereby causing the medium to be transferred from the plurality of feeding belts 15 to the pair of first conveying rollers 18. It is possible to pass appropriately and the medium can be transported appropriately. Further, the medium conveying apparatus 1 can reduce power consumption because the left downstream suction force and the right downstream suction force are smaller than the left suction force F1 and the right suction force F2.

Further, the left suction detection sensor 28-1 of the medium transport apparatus 1 according to the embodiment detects whether or not the medium has contacted the plurality of left belt medium contact portions 26-1 adjacent to the plurality of left intake ports 33-1. To do. The right suction detection sensor 28-2 detects whether or not the medium has contacted the right belt medium contact portion 26-2 adjacent to the plurality of right intake ports 33-2. When it is detected that the medium does not contact the left belt medium contact portion 26-1, the control unit 63 causes the air to be sucked through the plurality of left intake ports 33-1 so that the medium contacts the left belt medium. The suction unit 31 is controlled so that the force attracted to the part 26-1 increases. When it is detected that the medium does not contact the right belt medium contact portion 26-2, the control unit 63 causes the air to be sucked through the plurality of right intake ports 33-2, thereby causing the medium to contact the right belt medium. The suction unit 31 is controlled so that the force attracted to the part 26-2 increases.

By controlling the suction unit 31 in this way, the medium conveying apparatus 1 can bring the medium into more reliable contact with the left belt medium contact part 26-1 and the right belt medium contact part 26-2. . The medium conveying device 1 can appropriately feed one binding medium from a plurality of binding media by reliably bringing the medium into contact with the left belt medium contact portion 26-1 and the right belt medium contact portion 26-2. .

In addition, the downstream end of the plurality of left intake ports 33-1 and the downstream end of the plurality of right intake ports 33-2 of the medium transport apparatus 1 of the embodiment are downstream of the plurality of central intake ports 34. It arrange | positions downstream from the edge part of the side. In such a medium transport apparatus 1, the length of the plurality of left intake ports 33-1 and the length of the plurality of right intake ports 33-2 are longer than the length of the plurality of central intake ports 34, so It is possible to prevent the end of the medium from buckling before being conveyed by the one conveying roller 18. The medium conveying apparatus 1 can prevent the occurrence of jam by preventing buckling of the edge of the medium.

In addition, the medium transport apparatus 1 according to the embodiment further includes a lower transport guide 7. The lower conveyance guide 7 guides the lower side of the medium to the pair of first conveyance rollers 18. Such a medium transport apparatus 1 is provided with the lower transport guide 7 to prevent the end of the medium from buckling before the medium is transported to the pair of first transport rollers 18. it can.

The binding member removing device 10 according to the embodiment includes the medium conveying device 1 and the staple removing unit 22 according to the embodiment. The staple removing unit 22 removes the binding member that binds the medium from the medium after the medium is fed by the plurality of feeding belts 15. Such a binding member removal apparatus 10 can reduce power consumption by the medium conveyance apparatus 1 reducing power consumption.

In addition, the control unit 63 of the medium conveyance device 1 according to the embodiment allows the central front end region 53 to contact the central belt medium contact after the left front end region 52-1 contacts the left belt medium contact portion 26-1 of the plurality of feeding belts 15. The suction part 31 is controlled so as to contact the part 27. The control unit 63 controls the suction unit 31 so that the right tip region 52-2 contacts the right belt medium contact portion 26-2 after the center tip region 53 contacts the central belt medium contact portion 27.

Such a medium conveying apparatus 1 has a time when the left end region 52-1 contacts the left belt medium contact portion 26-1, and a time when the right end region 52-2 contacts the right belt medium contact portion 26-2. By providing a time difference, the bending of the central tip region 53 can be prevented. The medium conveying apparatus 1 can prevent the occurrence of a jam by preventing the central front end region 53 of the medium from being bent, and can prevent the medium from being damaged or the apparatus from being damaged.

By the way, in the medium transport apparatus 1 of the embodiment, the time difference is provided by starting the right transport blower 41-2 after starting the left transport blower 41-1, but the time difference may be provided by other methods. Good.

FIG. 27 is a graph showing a modified example of the change in suction force by which the medium is attracted to the upper transport guide 32. A broken line 91 indicates a change in the central suction force at which the central front end region 53 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 91 indicates that the central suction force changes from 0 to the central suction force F3 at time t4. A broken line 92 indicates a change in the left suction force in which the left end region 52-1 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 92 indicates that the left suction force changes from 0 to the left suction force F1 at time t4. A broken line 93 indicates a change in the right suction force by which the right front end region 52-2 of the medium placed on the document table 2 is attracted to the upper transport guide 32. A broken line 93 indicates that the right suction force starts to increase from 0 at time t5. The broken line 93 further indicates that the right suction force changes from a value smaller than the central suction force F3 to a value larger than the central suction force F3 at time t6. The broken line 93 further indicates that the right suction force becomes equal to the right suction force F2 after time t7.

Even when the medium is sucked as shown in the graph of FIG. 27, the suction unit 31 brings the center tip region 53 into the center belt medium contact portion after contacting the left tip region 52-1 with the left belt medium contact portion 26-1. 27 can be contacted. The suction unit 31 can bring the right tip region 52-2 into contact with the right belt medium contact portion 26-2 after the center tip region 53 is brought into contact with the center belt medium contact portion 27. That is, the suction part 31 can prevent the central tip region 53 from bending even when the medium is sucked as shown in the graph of FIG.

Incidentally, in the medium conveying apparatus 1 of the embodiment, the pair of first conveying rollers 18 is disposed between the left belt medium contact portion 26-1 and the right belt medium contact portion 26-2. The conveyance roller 18 may not be disposed between them. For example, the pair of first transport rollers 18 may be disposed on the downstream side of the downstream ends of the left belt medium contact part 26-1 and the right belt medium contact part 26-2. Even in such a case, the medium transport device 1 can reduce power consumption by making the central suction force F3 smaller than the left suction force F1 or the right suction force F2. At this time, the plurality of feeding belts 15 have the downstream end of the left belt medium contact part 26-1 and the right belt medium contact part 26-2 collinear with the downstream end of the central belt medium contact part 27. May be arranged.

By the way, the plurality of feeding belts 15 of the medium conveying apparatus 1 of the embodiment are flush with the downstream ends of the left belt medium contact part 26-1, the right belt medium contact part 26-2, and the central belt medium contact part 27. When placed on the line, it may be replaced with one payout belt. One feeding belt has a plurality of through holes through which air passes. Even when such a single feeding belt is provided, the medium conveying device 1 can appropriately feed out the medium, and can be consumed by making the central suction force F3 smaller than the left suction force F1 or the right suction force F2. Electric power can be reduced.

By the way, although the medium conveying apparatus 1 of the embodiment is used in the binding member removing apparatus 10, it may be used in other apparatuses. Examples of the apparatus include an image reading apparatus and a printer. For example, when the medium conveying apparatus 1 is used for an image reading apparatus, an image sensor is added. When the medium transport apparatus 1 is used in a printer, a printing apparatus is added. Even when the medium conveying apparatus 1 is used in an apparatus different from the binding member removing apparatus 10, the medium conveying apparatus 1 consumes air by sucking air so that the leading end area 51 of the medium is attracted to the plurality of feeding belts 15 with nonuniform suction force. Electric power can be reduced.

The embodiment has been described above, but the embodiment is not limited by the above-described content. In addition, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, at least one of various omissions, substitutions, and changes of the components can be made without departing from the scope of the embodiments.

DESCRIPTION OF SYMBOLS 1: Medium conveyance apparatus 2: Document table 7: Lower conveyance guide 10: Binding member removal apparatus 14: Conveyance path 15: Several feeding belt 18: A pair of 1st conveyance roller 19: A pair of 2nd conveyance roller 22: Staple Removal section 24-1: Plural left feeding belts 24-2: Plural right feeding belts 25: Plural central feeding belts 26-1: Left belt medium contact area 26-2: Right belt medium contact area 27: Central belt medium Contact part 28-1: Left side suction detection sensor 28-2: Right side suction detection sensor 29: Center suction detection sensor 30: Document detection sensor 31: Suction unit 32: Upper conveyance guide 33-1: Plural left suction ports 33-2 : A plurality of right inlets 34: a plurality of central inlets 35-1: a plurality of left downstream inlets 35-2: a plurality of right downstream inlets 41 -1: Left transport blower 41-2: Right transport blower 42: Central transport blower 51: Front end area 52-1: Left front end area 52-2: Right front end area 53: Central front end area 61: Belt drive section 62: Roller drive Unit 63: Control unit

Claims

A feeding belt;
A suction section for sucking air disposed in a space formed between the medium placed on the document table and the feeding belt through a plurality of air inlets;
A drive unit that moves the feeding belt so that the medium is fed when the medium is in contact with the feeding belt;
The first suction force that attracts the medium to the feeding belt by sucking air through the first air inlets of the plurality of air inlets is routed through the second air inlets of the plurality of air inlets. A medium conveying device that is larger than a second suction force that attracts the medium to the feeding belt by sucking air.
The first air inlet is
A third inlet,
Including a fourth inlet,
The medium conveyance device according to claim 1, wherein the second air inlet is disposed between the third air inlet and the fourth air inlet.
A sensor for detecting whether the medium is in contact with the feeding belt;
The control unit according to claim 2, further comprising: a control unit that controls the driving unit so that the medium is fed out by the feeding belt when the sensor detects that the medium has contacted the feeding belt. Medium transport device.
The controller is configured to draw a portion of the medium near the second air inlet after the portion of the medium near the third air inlet is drawn, and The medium according to claim 3, wherein the suction unit is controlled so that a part of the medium near the fourth air inlet is drawn after a part of the medium near the second air inlet is drawn. Conveying device.
The suction part is
A first blower for sucking air through the third air inlet;
The medium conveying apparatus according to claim 4, further comprising a second blower that sucks air through the fourth intake port.
A transport roller for transporting the medium by rotating;
A transport roller driving unit that rotates the transport roller;
A conveyance sensor that detects whether or not the medium is conveyed by the conveyance roller;
The medium conveyance device according to claim 3, wherein the control unit controls the driving unit so that the feeding belt does not move when it is detected that the medium is conveyed by the conveyance roller.
The feeding belt is
A first feeding belt;
A second feeding belt,
A portion of the medium that contacts the transport roller is disposed between a portion of the medium that contacts the first feeding belt and a portion of the medium that contacts the second feeding belt. The medium carrying device according to claim 6.
The plurality of air inlets are
A fifth intake port for sucking air so that the medium is attracted by a fifth suction force to a portion of the first feeding belt near the transport roller;
A sixth intake port for sucking air so that the medium is attracted by a sixth suction force to a portion of the second feeding belt near the transport roller;
The medium conveyance device according to claim 7, wherein the fifth suction force and the sixth suction force are smaller than the first suction force.
The sensor is
A first sensor that detects whether or not the medium is in contact with a first feeding belt adjacent to the third air inlet of the feeding belt;
A second sensor for detecting whether or not the medium is in contact with a second feeding belt adjacent to the fourth air inlet of the feeding belt;
The controller is
When it is detected that the medium does not come into contact with the first feeding belt, air is sucked through the third intake port so that the force with which the medium is attracted to the first feeding belt is increased. And controlling the suction part,
When it is detected that the medium does not come into contact with the second feeding belt, air is sucked through the fourth intake port so that the force with which the medium is attracted to the second feeding belt is increased. The medium conveyance device according to claim 3, wherein the suction unit is controlled.
The downstream end of the third intake port and the downstream end of the fourth intake port are disposed on the downstream side of the downstream end of the second intake port. Media transport device.
Of the medium, the other portion disposed closer to the conveying roller than the portion attracted to the feeding belt by sucking air through the third air inlet and the fourth air inlet is transported. The medium conveyance device according to claim 10, further comprising a conveyance guide that guides the roller.
A feeding belt;
A suction section for sucking air disposed in a space formed between the medium placed on the placement table and the feeding belt via a plurality of air inlets;
A drive unit that moves the feeding belt so that the medium is fed out when the medium is in contact with the feeding belt;
A removal unit that removes a binding member that binds the medium from the medium after the medium is fed by the feeding belt;
The first suction force that attracts the medium to the feeding belt by sucking air through the first air inlets of the plurality of air inlets is routed through the second air inlets of the plurality of air inlets. A binding member removing device having a larger suction force than the second suction force for attracting the medium to the feeding belt by sucking air.