JP7417379B2 - sheet feeding device - Google Patents

Description

The present invention relates to a sheet feeding device that feeds sheets.

As a sheet feeding device that supplies sheets, the paper is floated by blowing air onto the paper stacked on the paper feed tray, and the uppermost paper is attracted to the suction conveyance means. 2. Description of the Related Art A paper feeding device that feeds paper by conveying it is known.

This type of paper feeding device is disclosed in Patent Document 1, and is fixed on the downstream side in the paper conveyance direction with respect to a guide wall against which the leading edge of the paper stacked on the paper feeding table comes into contact, and is fixed on the downstream side in the paper conveyance direction. A device having a protruding sabaki member is disclosed. In this paper feeding device, among the floating papers, the paper other than the uppermost paper sucked by the suction conveyance means is dammed up by the sabbling member, thereby preventing double feeding of the papers.

Japanese Patent Application Publication No. 2005-239310

In the paper feeding device of Patent Document 1 described above, the upper end of the guide wall forms a step at the boundary with the sabaki member on the upstream side of the sabaki member, so that the paper that hits the sabaki member and falls falls onto the upper end of the guide wall. There is a risk that the paper may get caught and the stacking condition of the paper may be disturbed after it falls.

If the stacking state of the paper is disturbed, the behavior of the paper when it is floated will be disturbed, which may lead to problems in paper feeding. For example, double feeding of sheets may occur because the second or lower sheets from the top float up too much and are sucked together with the topmost sheet by the suction conveyance means.

The present invention has been made in view of the above, and an object of the present invention is to provide a sheet feeding device that can reduce sheet feeding problems.

In order to achieve the above object, the sheet feeding device of the present invention includes a floating section that floats sheets stacked on a loading table, and a floating section that sucks the uppermost sheet among the sheets floated by the floating section. a conveyance unit that conveys the sheet; and an inclined surface that is disposed downstream of the loading table in the direction in which the sheet is conveyed by the conveyance unit, is connected to an upper end of a guide surface perpendicular to the conveyance direction, and becomes lower toward the upstream side in the conveyance direction. a guide section disposed downstream of the guide surface in the conveyance direction and upstream of the downstream end of the inclined surface, the most of the sheets floated by the floating section adsorbed by the conveyance section; The present invention is characterized by comprising a damming part that dams up seats other than the upper seat.

According to the sheet feeding device of the present invention, problems in sheet feeding can be reduced.

FIG. 1 is a schematic configuration diagram of a paper feeding device according to an embodiment. 2 is a control block diagram of the paper feeding device shown in FIG. 1. FIG. 2 is a plan view of the paper feeding device shown in FIG. 1. FIG. FIG. 2 is an enlarged view of the vicinity of the main floating air outlet of the paper feeding device shown in FIG. 1. FIG. 2 is an explanatory diagram of a paper feed guide plate and a sabaki gate of the paper feed device shown in FIG. 1. FIG. FIG. 2 is a partially enlarged view of a side fence of the paper feeding device shown in FIG. 1. FIG. 2 is a diagram showing a floating state of paper in the paper feeding device shown in FIG. 1. FIG. FIG. 2 is a diagram showing the state of the paper feeding device shown in FIG. 1 at the end of paper falling;

Embodiments of the present invention will be described below with reference to the drawings. The same or equivalent parts and components are designated by the same or equivalent symbols throughout the drawings.

The embodiments shown below exemplify devices etc. for embodying the technical idea of this invention, and the technical idea of this invention includes the material, shape, structure, arrangement etc. of each component. shall not be specified as: The technical idea of this invention can be modified in various ways within the scope of the claims.

FIG. 1 is a schematic configuration diagram of a paper feeding device according to an embodiment of the present invention. FIG. 2 is a control block diagram of the paper feeding device shown in FIG. 1. FIG. 3 is a plan view of the paper feeding device shown in FIG. 1. FIG. 4 is an enlarged view of the vicinity of the main floating air outlet of the paper feeding device shown in FIG. FIG. 5 is an explanatory diagram of a paper feeding guide plate and a sabaki gate of the paper feeding device shown in FIG. 6 is a partially enlarged view of the side fence of the paper feeder shown in FIG. 1. FIG. In the following description, the direction perpendicular to the paper surface of FIG. 1 will be referred to as the front-rear direction, and the front direction of the paper surface will be referred to as the front direction. Moreover, the top, bottom, left and right of the paper surface in FIG. 1 are defined as the top, bottom, left and right directions.

As shown in FIGS. 1 to 3, a paper feeding device (corresponding to a sheet feeding device) 1 according to the present embodiment includes a paper feeding table (corresponding to a loading table) 2, a lifting motor 3, and a paper feeding guide plate. (corresponding to the guide part) 4, the Sabaki gate 5, the two side fences 6, the end fence 7, the floating part 8, the separation part 9, the conveying part 10, the upper limit sensor 11, and the control part 12. Be prepared.

The paper feeding device 1 is a device that feeds paper (equivalent to a sheet) P to a printing section (not shown) of a printing device. The direction from left to right in FIG. 1 is the direction in which the paper P is transported by the transport section 10 during the paper feeding operation. Upstream and downstream in the following description refer to upstream and downstream in the direction in which the paper P is conveyed by the conveying section 10.

The paper feed tray 2 is used to stack paper P used for printing. The paper feed tray 2 is configured to be movable up and down.

The elevating motor 3 raises and lowers the paper feed tray 2.

The paper feed guide plate 4 is a member that regulates the position of the downstream end (right end) of the paper P on the paper feed table 2 . The paper feed guide plate 4 is disposed near the downstream side of the paper feed table 2 and below the downstream end of a belt unit 51, which will be described later. The paper feed guide plate 4 has a vertical surface (corresponding to a guide surface) 4a and an inclined surface 4b.

The vertical surface 4a is a surface that is parallel to the vertical direction (vertical direction) and perpendicular to the conveyance direction (horizontal direction) of the paper P by the conveyance unit 10. The vertical surface 4a is a surface that regulates the position of the downstream end of the paper P on the paper feed tray 2.

The inclined surface 4b is a surface that is connected to the upper end of the vertical surface 4a and is inclined so that it becomes lower toward the upstream side. The inclined surface 4b is a surface that guides the paper P so that when the paper P floated by the floating section 8 falls, it returns to the stacked state without being caught by the paper feed guide plate 4. The upper end of the inclined surface 4b is located at a lower position than a conveyance surface 56b of a belt unit 51, which will be described later.

Further, as shown in FIGS. 3 and 4, the paper feed guide plate 4 has a notch 4c for blowing air from the main flotation mechanism section 21 (to be described later) onto the paper P on the paper feed tray 2 in the front and back direction. It is formed by cutting out the upper part of the central part of.

The sabaki gate 5 is a member that dams up sheets P other than the uppermost sheet P that is attracted to the transport section 10 among the sheets P floated by the floating section 8 . Two Sabaki gates 5 are installed in the lower vicinity of the downstream end of the conveyance section 10, spaced apart from each other in the front-back direction. The Sabaki gate 5 is arranged downstream of the vertical surface 4a of the paper feed guide plate 4.

The Sabaki gate 5 has a damming surface (corresponding to a damming part) 5a. The damming surface 5a is a surface that dams up the paper P. As shown in FIG. 5, the damming surface 5a is a portion of the upstream (left side) surface of the Sabaki gate 5 above the position intersecting with the inclined surface 4b of the paper feed guide plate 4 when viewed from the front or rear side. be.

The damming surface 5a is disposed downstream of the vertical surface 4a of the paper feed guide plate 4 and upstream of the downstream end (upper end) of the inclined surface 4b. The damming surface 5a is inclined so that it becomes lower toward the upstream side. The damming surface 5a has a larger inclination with respect to the horizontal direction than the inclined surface 4b, and is provided at an inclination angle that can perform the function of damming up the paper P.

The damming surface 5a is arranged such that the distance between its upper end and a conveyance surface 56b of the belt unit 51, which will be described later, is a predetermined set distance value. The set interval value is a value set so that only the uppermost sheet P that is attracted to the conveyance surface 56b of the belt unit 51 and conveyed is allowed to pass between the conveyance surface 56b and the damming surface 5a. be.

The side fence 6 is a member that restricts the position of the paper P on the paper feed table 2 in the front-rear direction. The two side fences 6 are spaced apart from each other in the front-rear direction. As shown in FIG. 6, the side fence 6 is formed with a side floating air outlet 16 and a side separation air outlet 17. Further, as shown in FIGS. 3, 4, and 6, the side fence 6 is provided with a flow regulating member 18. Note that FIG. 6 is a diagram of the rear side fence 6 viewed from the front side.

The side floating air outlet 16 is an outlet for a side floating air flow generated by a side floating mechanism section 22, which will be described later. The side separation air outlet 17 is an outlet for a side separation airflow generated by a side separation mechanism section 42, which will be described later.

The rectifying member 18 pulls the uppermost sheet P of the sheets P floated by the floating unit 8 on the sheet feed tray 2, and creates a gap between the uppermost sheet P and the second sheet P from the top. This is a member that allows the side separation airflow to flow. The flow regulating member 18 is attached along the upper edge of the side separation air outlet 17 on the inside surface of the side fence 6 (on the paper feed table 2 side). The rectifying member 18 is inclined so as to become higher toward the center of the paper feed tray 2 in the front-rear direction.

The end fence 7 is a member that regulates the position of the upstream end (left end) of the paper P on the paper feed table 2 . The end fence 7 is for preventing the paper P from retreating upstream due to a main floating airflow generated by a main floating mechanism section 21, which will be described later. The end fence 7 is arranged above the paper feed table 2.

The floating unit 8 blows air onto the paper P on the paper feed tray 2 to float the paper P. The floating section 8 includes a main floating mechanism section 21 and two side floating mechanism sections 22.

The main floating mechanism section 21 blows air to float the paper P on the paper feed tray 2 from the downstream side. The main floating mechanism section 21 is arranged near the downstream side of the paper feed tray 2. The main flotation mechanism section 21 includes a main flotation fan 26, a shutter 27, and two main flotation air outlets 28.

The main floating fan 26 blows air onto the paper P on the paper feed table 2 from the downstream side to generate a main floating airflow for floating the paper P.

The shutter 27 switches between blowing out the main floating airflow from the main floating air outlet 28 and stopping it. While the main flotation fan 26 is being driven, when the shutter 27 is open, the main flotation airflow is blown out from the main flotation air outlet 28, and when the shutter 27 is closed, the main flotation airflow is blown out from the main flotation air outlet 28. The blowing of the main floating airflow is stopped.

The main floating air outlet 28 is an outlet for a main floating air flow generated by driving the main floating fan 26 . The two main floating air outlets 28 are arranged at a distance from each other in the front-rear direction in the lower vicinity of the downstream end of the conveying section 10.

The two side floating mechanisms 22 are arranged so as to be spaced apart from each other in the front-rear direction with the paper feed table 2 in between. The two side floating mechanisms 22 are installed one each on the outside of the two side fences 6.

The front side floating mechanism section 22 blows air to float the paper P on the paper feed tray 2 from the front side. The rear side floating mechanism section 22 blows air to float the paper P on the paper feed table 2 from the rear side. The side levitation mechanism section 22 includes a side levitation fan 31 and a shutter 32.

The side floating fan 31 blows air onto the paper P on the paper feed table 2 from the side floating air outlet 16 of the side fence 6 to generate a side floating airflow for floating the paper P.

The shutter 32 switches between blowing out and stopping the side floating airflow from the side floating air outlet 16. While the side floating fan 31 is being driven, when the shutter 32 is open, side floating air flows out from the side floating air outlet 16, and when the shutter 32 is closed, the side floating airflow blows out from the side floating air outlet 16. Blowout of the side floating airflow is stopped.

The separating section 9 separates the uppermost sheet P of the sheets P floated by the floating section 8 from the second and subsequent sheets P from the top. The separation section 9 includes a main separation mechanism section 41 and two side separation mechanism sections 42.

The main separation mechanism section 41 flows air from the downstream side between the uppermost sheet P floated by the floating section 8 and adsorbed to the transport section 10 and the second sheet P from the top. The main separation mechanism section 41 includes a main separation fan 46 and two main separation air outlets 47 .

The main separation fan 46 flows air from the downstream side between the top sheet P and the second sheet P from the top that have been attracted to the conveyance unit 10, and separates the top sheet P and the second sheet from the top. A main separation airflow for separating the paper P is generated.

The main separation air outlet 47 is an outlet for the main floating air flow generated by driving the main separation fan 46. The two main separation air outlets 47 are arranged in the vicinity of the lower part of the downstream end of the conveying section 10 and spaced apart from each other in the front-rear direction. The main separation air outlet 47 blows air upward toward the conveying section 10.

The two side separation mechanisms 42 are arranged so as to be spaced apart from each other in the front-rear direction with the paper feed table 2 in between. The two side separation mechanisms 42 are installed one each on the outside of the two side fences 6. The side separation mechanism section 42 is arranged adjacent to the left side of the side floating mechanism section 22.

The side separation mechanism section 42 draws the top sheet P of the sheets P floated by the floating section 8 toward the rectifying member 18, and separates the top sheet P from the second sheet P from the top. A side separation airflow for this purpose is blown out from a side separation air outlet 17 of the side fence 6. The side separation mechanism section 42 includes a side separation fan 48 that generates side separation airflow.

The transport section 10 attracts and transports the uppermost sheet P of the sheets P floated by the floating section 8 . The conveyance section 10 includes two belt units 51, a conveyance motor 52, a chamber 53, and a suction fan 54.

The belt unit 51 attracts and holds the paper P and transports it. The two belt units 51 are arranged in parallel in the front-rear direction. The belt unit 51 is disposed straddling the right end of the paper feed table 2 in the left-right direction. The belt unit 51 includes a conveyor belt 56, a drive roller 57, and a driven roller 58.

The conveyance belt 56 is an annular belt that is stretched around a drive roller 57 and a driven roller 58. A plurality of belt holes 56a are formed in the conveyor belt 56 over the entire circumference. The conveyance belt 56 attracts and holds the paper P on the conveyance surface 56b, which is the lower surface of the conveyance belt 56, by the suction force generated in the belt hole 56a by the drive of the suction fan 54. The paper P is transported by the drive roller 57 driving the transport belt 56 to rotate (endless movement) while holding the paper P by suction.

The drive roller 57 rotates (endlessly moves) the conveyor belt 56. The drive rollers 57 of the two belt units 51 are connected to each other by a shaft 59.

The driven roller 58 supports the conveyor belt 56 together with the drive roller 57 . The driven roller 58 rotates as a result of the rotating conveyor belt 56 . The driven rollers 58 of the two belt units 51 are connected to each other by a shaft 60.

The conveyance motor 52 rotates the drive roller 57 by rotating the shaft 59 .

The chamber 53 forms a negative pressure chamber for generating suction force in the belt hole 56a of the belt unit 51. The chamber 53 holds the belt unit 51 therein so that the conveying surface 56b of the conveying belt 56 is exposed. A ventilation hole (not shown) is formed in a portion of the bottom plate of the chamber 53 through which the conveyor belt 56 passes. By suctioning air into the chamber 53 through the belt hole 56a of the conveyance surface 56b of the conveyor belt 56 and the ventilation hole of the chamber 53, a suction force is generated in the belt hole 56a.

A suction fan 54 exhausts air from the chamber 53. When the suction fan 54 exhausts air from the chamber 53, air is sucked into the chamber 53 from outside the chamber 53 through the belt hole 56a of the conveyor belt 56 and the ventilation hole of the chamber 53. The suction fan 54 is arranged above the chamber 53.

The upper limit sensor 11 is for detecting whether or not the uppermost sheet P of the sheets P stacked on the paper feed tray 2 is at a predetermined upper limit position. The upper limit sensor 11 is a reflective optical sensor.

The control unit 12 controls the entire operation of the paper feeding device 1 . The control unit 12 includes a CPU, RAM, ROM, hard disk, and the like.

Next, the operation of the paper feeding device 1 will be explained.

When instructed to start feeding, the control unit 12 starts driving the main floating fan 26, the two side floating fans 31, the main separation fan 46, the two side separation fans 48, and the suction fan 54. Both the shutter 27 and the two shutters 32 are in an open state.

As a result, a main floating airflow is blown out from the main floating air outlet 28, a side floating airflow is blown out from the side floating air outlet 16, a main separation airflow is blown out from the main separation air outlet 47, and a side separation airflow is blown out from the side separation air outlet 17. Further, an attractive force is generated in the belt hole 56a of the belt unit 51.

As shown in FIG. 7, the main floating air current and the side floating air current cause the paper P in the floating area F to float, and the uppermost paper P among the floating papers P is attracted to the conveying surface 56b of the belt unit 51. be done. The floating area F is a range in which the floating section 8 floats the paper P, and is an area from the conveying surface 56b to a predetermined height position below the conveying surface 56b. The lower limit of the floating area F is below the lower end of the damming surface 5a. That is, at least a portion of the portion of the inclined surface 4b of the paper feed guide plate 4 below the damming surface 5a is within the floating area F.

Here, when the paper P floats, in the vicinity of the side fence 6, the side separation airflow blown out from the side separation air outlet 17 flows along the rectification member 18, so that the rectification member 18 and the uppermost sheet P There is a negative pressure between the two. As a result, the uppermost sheet P is drawn toward the rectifying member 18 and comes into contact with the rectifying member 18 . As a result, a side separation airflow flows between the uppermost sheet P and the second sheet P from the top.

On the other hand, on the main separation mechanism section 41 side, after the uppermost sheet P is attracted to the conveyance surface 56b, the main separation airflow blown out from the main separation air outlet 47 transfers the uppermost sheet P attracted to the conveyance surface 56b. Flows toward the upstream side (left side) along.

As a result, between the topmost paper P and the second paper P from the top, the main separation airflow, the side separation airflow from the front side, and the side separation airflow from the rear side collide, and positive pressure is generated. .

In this state, the control unit 12 controls the shutter 27 and the two shutters 32 to close. Furthermore, after the shutters 27 and 32 are closed, the control unit 12 controls the conveyance motor 52 to start driving the belt unit 51.

When the belt unit 51 starts driving, the uppermost sheet P attracted to the transport surface 56b starts to be transported rightward.

Further, by closing the shutters 27 and 32, the main floating airflow from the main floating air outlet 28 and the side floating airflow from the side floating air outlet 16 are stopped. As a result, the positive pressure between the topmost sheet of paper P and the second sheet of paper P from the top pushes down the second and subsequent sheets of paper P from the top, so that the topmost sheet of paper P and the second sheet from the top The following paper P is separated. The second and subsequent sheets of paper P fall onto the paper P remaining on the paper feed table 2.

As described above, while the uppermost sheet P is conveyed by the belt unit 51, the second and subsequent sheets of paper P from the top fall.

The uppermost sheet P conveyed by the belt unit 51 passes through the gap between the conveyance surface 56b and the Sabaki gate 5, and is conveyed toward the sheet feeding destination.

The second and subsequent sheets of paper P from the top are blocked by the damming surface 5a of the Sabaki gate 5 and fall. At this time, the downstream end of the falling paper P is guided by the damming surface 5a and the inclined surface 4b of the paper feed guide plate 4. The inclination of the inclined surface 4b prevents the falling paper P from being caught on the paper feed guide plate 4. Furthermore, since the damming surface 5a is inclined, the paper P can be guided smoothly even at the boundary between the damming surface 5a and the inclined surface 4b, so that the paper P is further prevented from being caught on the paper feed guide plate 4.

When the paper P has finished falling, the paper P other than the paper P conveyed by the belt unit 51 returns to the stacked state on the paper feed tray 2, as shown in FIG.

After the paper P has finished falling, at a predetermined upper limit detection timing, the control unit 12 determines whether the uppermost paper P among the papers P on the paper feed tray 2 is at the upper limit position based on the output signal of the upper limit sensor 11. Decide whether or not. If it is determined that the uppermost sheet P is not at the upper limit position, the control unit 12 raises the paper feed tray 2 until the uppermost sheet P reaches the upper limit position.

Next, the control section 12 stops the belt unit 51 at a predetermined timing after the belt unit 51 starts driving. Thereafter, in order to feed the next sheet P, the control unit 12 opens the shutter 27 and the two shutters 32 to levitate the sheet P in the floating area F.

By repeating the above operations, the sheets P are sequentially fed from the sheet feeding device 1 to the sheet feeding destination.

As described above, in the paper feeder 1, the paper feed guide plate 4 has the inclined surface 4b at the upper end. The damming surface 5a of the Sabaki gate 5 is arranged downstream of the vertical surface 4a of the paper feed guide plate 4 and upstream of the downstream end of the inclined surface 4b. As a result, the inclined surface 4b guides the falling paper P, thereby preventing the paper P from getting caught on the paper feed guide plate 4 while falling. This prevents the stacking state of the sheets P from being disturbed after they are dropped. As a result, it is possible to reduce paper feeding problems caused by disturbances in the behavior of the paper P when the paper P is floated by the floating section 8.

Here, unlike the present embodiment, if the paper feed guide plate 4 does not have the inclined surface 4b and is flat and vertical to the upper end, the falling paper P will fall onto the paper feed guide plate 4. There is a risk that the paper P may get caught on the upper edge of the paper P and not fall properly, and the stacking state of the paper P may be disturbed after the paper P falls. If air is blown onto sheets P that are in a disordered state to float them up, for example, the second or lower sheets of paper P from the top will float up too much and cannot be properly separated from the topmost sheet P, resulting in double feeding of sheets P. There is a possibility that this may occur.

In contrast, in the present embodiment, as described above, disturbances in the stacking state of the paper P after the paper P is dropped can be suppressed. Defects can be reduced.

In addition, in the paper feeder 1, the sabaki gate 5 is disposed downstream of the vertical surface 4a of the paper feed guide plate 4, so even if there are variations in parts, the sabaki gate 5 is placed on the vertical surface 4a of the paper feed guide plate 4. It is possible to suppress the arrangement from protruding further upstream.

If the Sabaki gate 5 protrudes upstream from the vertical surface 4a of the paper feed guide plate 4, the paper P on the paper feed tray 2 may come into contact with the Sabaki gate 5 and retreat upstream when the paper feed tray 2 is raised. be. When the paper P on the paper feed tray 2 retreats to the upstream side, the flotation effect of the paper P by the main floating airflow of the main flotation mechanism section 21 decreases, the paper P is not attracted to the belt unit 51, and the paper P is not fed. may occur.

On the other hand, in the paper feeding device 1, the Sabaki gate 5 is prevented from protruding upstream from the vertical surface 4a of the paper feeding guide plate 4, so that it is possible to suppress the occurrence of empty feeding of the paper P as described above.

Further, in the paper feeding device 1, the damming surface 5a of the Sabaki gate 5 is inclined so that it becomes lower toward the upstream side. Thereby, the paper P can be guided smoothly even at the boundary between the damming surface 5a and the inclined surface 4b, so that the paper P is further prevented from being caught on the paper feed guide plate 4.

Note that the damming surface 5a of the Sabaki gate 5 may be a surface parallel to the vertical surface 4a of the paper feed guide plate 4. Even in this case, the inclined surface 4b of the paper feed guide plate 4 guides the falling paper P, thereby preventing the paper P from getting caught on the paper feed guide plate 4 while falling.

The present invention is also applicable to devices that supply sheets other than paper.

The present invention is not limited to the above-described embodiments as they are, but can be implemented by modifying the constituent elements within the scope of the invention at the implementation stage. Moreover, various inventions can be formed by appropriately combining the plurality of components disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiments.

[Additional notes]
This application discloses the following invention.

(Additional note 1)
a floating unit that levitates the sheets loaded on the loading table;
a conveyance unit that adsorbs and conveys the uppermost sheet among the sheets floated by the floating unit;
a guide section that is disposed on the downstream side of the loading platform in the direction in which the sheet is conveyed by the conveyance section, is connected to an upper end of a guide surface perpendicular to the conveyance direction, and has an inclined surface that becomes lower toward the upstream side in the conveyance direction;
A sheet other than the uppermost sheet adsorbed by the conveyance unit among the sheets that are disposed downstream of the guide surface in the conveyance direction and upstream of the downstream end of the inclined surface and floated by the floating unit. A sheet feeding device characterized by comprising: a damming part for damming up;

(Additional note 2)
The sheet feeding device according to Supplementary Note 1, wherein the damming portion is inclined such that it becomes lower toward the upstream side in the conveyance direction.

1 Paper feeding device 2 Paper feeding table 3 Lifting motor 4 Paper feeding guide plate 4a Vertical surface 4b Inclined surface 5 Sabaki gate 5a Damping surface 6 Side fence 7 End fence 8 Floating section 9 Separation section 10 Conveyance section 11 Upper limit sensor 12 Control section 21 Main Floating mechanism section 22 Side levitation mechanism section 41 Main separation mechanism section 42 Side separation mechanism section 51 Belt unit 52 Conveyance motor 53 Chamber 54 Suction fan F Floating area

Claims (4)

a floating section that levitates the sheets loaded on the loading table;
a conveyance unit that adsorbs and conveys the uppermost sheet among the sheets floated by the floating unit;
a guide section that is disposed on the downstream side of the loading table in the direction in which the sheet is conveyed by the conveyance section, is connected to an upper end of a guide surface perpendicular to the conveyance direction, and has an inclined surface that becomes lower toward the upstream side in the conveyance direction;
A sheet other than the uppermost sheet adsorbed by the conveyance unit among the sheets that are disposed downstream of the guide surface in the conveyance direction and upstream of the downstream end of the inclined surface and floated by the floating unit. It is equipped with a damming part that dams up the
The sheet feeding device according to claim 1, wherein the inclined surface guides sheets that fall while being blocked by the damming portion so as to return to a stacked state . 2. The sheet feeding device according to claim 1, wherein the damming part is inclined so that it becomes lower toward the upstream side in the conveying direction. The sheet feeding device according to claim 2, wherein the damming part has a larger inclination with respect to the horizontal direction than the inclined surface. 4. The sheet according to claim 1, wherein at least a portion of the inclined surface below the damming section is located in a region where the floating section floats the sheet. Sheet feeding device.