JP6572044B2 - Paper discharge device - Google Patents

Description

  The present invention relates to a paper discharge device that discharges printed paper.

  2. Description of the Related Art A paper discharge device that is provided in a printing device and discharges and stacks printed sheets is known. The paper discharge device is required to have good discharge alignment.

  Patent Document 1 discloses a paper discharge device in which ribs (protrusions) are provided on an end fence against which a sheet that slides down along the inclination of a paper discharge table is provided in order to improve the paper discharge alignment. In this paper discharge device, a gap is formed between the end fence and the paper when the paper hits the rib. By escaping air from the gap, the speed of the slipping paper is slowed down so that it does not collide with the next paper or the paper leans against the end fence. Thereby, the deterioration of the paper discharge alignment is suppressed.

JP 2010-89852 A

  In the paper discharge device of Patent Document 1, the rib is arranged at a position corresponding to the paper width in the main paper size. However, when the paper to be ejected is a paper other than the main paper size, the end of the paper in the paper width direction protrudes from the rib, and the paper rotates with the corner of the rib as a fulcrum, which deteriorates the paper ejection alignment. There is a fear.

  The present invention has been made in view of the above, and an object of the present invention is to provide a paper discharge device that can reduce deterioration in paper discharge alignment.

  In order to achieve the above object, a first feature of a paper discharge device according to the present invention is that a paper discharge unit that conveys and discharges paper, and an upstream side in a paper discharge direction by the paper discharge unit is lower than a downstream side. A sheet discharge table on which the sheets discharged by the sheet discharge unit are stacked, a fence erected at the upstream end of the sheet discharge direction in the sheet discharge direction, and the sheet discharge unit A pair of paper discharge wings that move in the paper width direction according to the paper width of the paper to be discharged by the paper and raise both ends of the paper in the paper width direction to curve the paper, and the paper discharge side of the fence A pair of first butts that are disposed on the surface of the sheet and that are integrated with each of the pair of sheet discharge wings and that can move in the sheet width direction and that slides along the inclination of the sheet discharge table. And providing a member.

  A second feature of the paper discharge device according to the present invention is that each of the pair of first abutting members has an abutting surface formed over a predetermined range including a reference position where the end of the sheet abuts in the sheet width direction. Is to have.

  A third feature of the paper discharge device according to the present invention is that it is arranged on the surface on the paper discharge stand side of the fence between the pair of first abutting members in the paper width direction and is movable in the paper width direction. Further, another object of the present invention is to further include a pair of second abutting members against which the paper sliding down along the inclination of the paper discharge table is abutted.

  According to the first feature of the paper discharge device according to the present invention, the pair of first abutting members are integrated with each of the pair of paper discharge wings and are movable in the paper width direction. For this reason, the abutting member together with the paper discharge wing is disposed at a position corresponding to the paper width of the paper to be discharged. Thereby, since the abutting member is arranged at a position not appropriate for the paper size, it is possible to reduce the rotation of the paper due to the end of the paper protruding from the abutting member. As a result, it is possible to reduce the deterioration of the paper discharge alignment.

  According to the second feature of the paper discharge device according to the present invention, the first abutting member has an abutting surface formed over a predetermined range including a reference position where the end of the sheet abuts in the sheet width direction. As a result, even if the paper is misaligned in the paper width direction, it is possible to reduce the rotation of the paper by receiving the end of the paper with the abutting surface. As a result, it is possible to further reduce the deterioration of the paper discharge alignment.

  According to the third feature of the paper discharge device according to the present invention, the paper discharge device is disposed between the pair of first abutting members in the paper width direction and is movable in the paper width direction. A contact member is provided. For this reason, the second abutting member can be arranged at a position corresponding to the paper size with respect to various sizes of small paper. Thereby, since the abutting member is arranged at a position not appropriate for the paper size, it is possible to reduce the rotation of the paper due to the end of the paper protruding from the abutting member. As a result, it is possible to reduce the deterioration of paper discharge alignment when discharging small-size paper.

It is a perspective view of the paper discharge device concerning an embodiment. FIG. 2 is a plan view of a main part of the paper discharge device shown in FIG. 1. FIG. 2 is a control block diagram of the paper discharge device shown in FIG. 1. FIG. 6 is an explanatory diagram of a paper curve formation by a paper discharge wing. It is explanatory drawing of the behavior of the paper on a paper discharge stand. It is explanatory drawing of the behavior of the paper on a paper discharge stand. It is a figure which shows the state in which the paper contact | abutted against the butting member and the rib. It is a figure which shows the state in which the small sized paper contact | abutted to the rib.

  Embodiments of the present invention will be described below with reference to the drawings. Throughout the drawings, the same or equivalent parts and components are denoted by the same or equivalent reference numerals.

  The following embodiments exemplify devices for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, arrangement, etc. of each component. Is not specified as follows. The technical idea of the present invention can be variously modified within the scope of the claims.

  FIG. 1 is a perspective view of a paper discharge device according to an embodiment of the present invention. FIG. 2 is a plan view of a main part of the paper discharge device shown in FIG. FIG. 3 is a control block diagram of the paper discharge device shown in FIG. In the following description, the direction parallel to the conveyance direction (paper discharge direction) of the paper P by the paper discharge roller 2 is defined as the front-rear direction, and the front end side of the paper P is defined as the front. Further, the top, bottom, left, and right viewed from the front side are defined as the top, bottom, left, and right directions. In the following description, upstream and downstream mean upstream and downstream in the paper discharge direction.

  As shown in FIGS. 1 to 3, a paper discharge device 1 according to the present embodiment includes a paper discharge roller (corresponding to a paper discharge unit in claims) 2, a paper discharge motor 3, a guide plate 4, and a discharge plate. A paper base 5, an end fence (corresponding to a fence in claims) 6, a pair of discharge wings 7A and 7B, a discharge wing moving motor 8, and a pair of abutting members (first abutting member in claims) 9A, 9B, a pair of ribs (corresponding to a second abutting member in claims) 10A, 10B, a rib moving motor 11, and a control unit 12. The paper discharge device 1 is provided in a printing device (not shown).

  The paper discharge roller 2 conveys and discharges the printed paper P sent from the printing device arranged on the upstream side (rear side) of the paper discharge device 1. The paper discharge roller 2 is disposed above and behind the rear end of the paper discharge tray 5.

  The paper discharge motor 3 rotates the paper discharge roller 2.

  The guide plate 4 guides the lower surface of the conveyed paper P. The guide plate 4 is horizontally installed above and behind the rear end of the paper discharge tray 5.

  The paper discharge tray 5 is a stack on which the paper P discharged by the paper discharge roller 2 is stacked. The paper discharge tray 5 is formed to be inclined so that the upstream side (rear side) is lower than the downstream side (front side).

  The end fence 6 receives the paper P that slides along the inclination of the paper discharge tray 5. The end fence 6 is erected vertically at the upstream end of the paper discharge tray 5. The end fence 6 has the same length (width) as the paper discharge tray 5 in the paper width direction (left-right direction) orthogonal to the paper discharge direction.

  The pair of paper discharge wings 7A and 7B raises both ends in the paper width direction of the paper P discharged by the paper discharge roller 2, and curves the paper P into a U shape. As a result, it is possible to smooth the paper discharge to the paper discharge tray 5 by adding a stiffness to the conveyed paper P. The paper discharge wings 7A and 7B are arranged apart from each other in the left-right direction with the center line C interposed therebetween. The center line C is a line passing through the center in the left-right direction of the transport path of the paper P.

  The paper discharge wings 7A and 7B respectively have guide surfaces 7a that are inclined upward toward the downstream side (front side) and the outer side (side far from the center line C). The guide surfaces 7a of the paper discharge wings 7A and 7B raise both ends in the paper width direction of the paper P to be discharged, so that the paper P is curved in a U shape.

  The paper discharge wings 7A and 7B are configured to be movable in the left-right direction (paper width direction). Specifically, the paper discharge wings 7A and 7B are configured to be movable in conjunction with each other in the left-right direction symmetrically with respect to the center line C. That is, when the paper discharge wing 7A moves away from the center line C, the paper discharge wing 7B moves away from the center line C. When the paper discharge wing 7A approaches the center line C, the paper discharge wing 7B also moves so as to approach the center line C. To do.

  The paper discharge wing moving motor 8 moves the pair of paper discharge wings 7A and 7B. The driving force of the paper discharge wing moving motor 8 is transmitted to the paper discharge wings 7A and 7B by a paper discharge wing moving mechanism (not shown) so that the paper discharge wings 7A and 7B move. The paper discharge wing moving motor 8 is a pulse motor. The interval between the discharge wings 7A and 7B is narrowed by the rotation drive in one direction of the discharge wing movement motor 8, and the interval between the discharge wings 7A and 7B is increased by the rotation drive in the other direction of the discharge wing movement motor 8. ing.

  The pair of abutting members 9 </ b> A and 9 </ b> B is a member against which the paper P sliding down along the inclination of the paper discharge table 5 is abutted. The abutting members 9A and 9B are arranged on a regulation surface 6a which is a surface of the end fence 6 on the sheet discharge table 5 side, and are formed so as to protrude from the regulation surface 6a to the sheet discharge table 5 side. The abutting members 9A and 9B are formed integrally with the paper discharge wings 7A and 7B, respectively, and are movable in the left-right direction together with the paper discharge wings 7A and 7B.

  The abutting members 9A and 9B each have an abutting surface 9a. The abutting surface 9a is a surface against which the end of the paper P in the paper width direction is abutted. The abutting surface 9a is a flat surface disposed in front of the regulating surface 6a of the end fence 6 and parallel to the regulating surface 6a. The abutting surface 9a is formed over a predetermined range including a reference position K where the end of the paper P abuts against the abutting members 9A and 9B in the paper width direction. Specifically, the abutting surface 9a is formed to have a set width Wt with the reference position K as the center in the sheet width direction.

  The reference position K of the edge of the paper P in the abutting members 9A and 9B is when the paper discharge wings 7A and 7B and the abutting members 9A and 9B are arranged at positions corresponding to the paper width Wp of the paper P to be discharged. Of the abutting members 9A and 9B at the end of the sheet P in the sheet width direction. That is, when the paper discharge wings 7A and 7B and the abutting members 9A and 9B are arranged at positions corresponding to the paper width Wp, the reference position K of the end of the paper P in the abutting members 9A and 9B is from the center line C. Wp / 2 is at the outer position.

  The width Wt of the abutting surface 9a is set according to the size variation of the position of the paper P in the left-right direction (paper width direction) when it is conveyed by the paper discharge roller 2 and discharged. Specifically, the width Wt of the abutting surface 9a is such that the edge of the paper P does not protrude from the abutting surface 9a even when the positional deviation of the paper P in the left-right direction (paper width direction) becomes maximum. Set to a value.

  The pair of ribs 10 </ b> A and 10 </ b> B is a member against which the paper P sliding down along the inclination of the paper discharge tray 5 is abutted. The ribs 10A and 10B are disposed on the regulation surface 6a of the end fence 6 and are formed so as to protrude from the regulation surface 6a to the paper discharge tray 5 side. The ribs 10A and 10B are disposed between the abutting members 9A and 9B in the paper width direction. The ribs 10A and 10B are spaced apart from each other in the left-right direction across the center line C.

  The ribs 10A and 10B are configured to be movable in the left-right direction. Specifically, the ribs 10A and 10B are configured to be movable in conjunction with each other in the left-right direction symmetrically with respect to the center line C. That is, when the rib 10A moves away from the center line C, the rib 10B moves away from the center line C, and when the rib 10A approaches the center line C, the rib 10B also moves closer to the center line C.

  The rib moving motor 11 moves the pair of ribs 10A and 10B. The driving force of the rib moving motor 11 is transmitted to the ribs 10A and 10B by a rib moving mechanism (not shown) so that the ribs 10A and 10B move. The rib moving motor 11 is a pulse motor. The interval between the ribs 10A and 10B is narrowed by the rotational drive in one direction of the rib moving motor 11, and the interval between the ribs 10A and 10B is widened by the rotational drive in the other direction of the discharge wing moving motor 8.

  The control unit 12 controls the overall operation of the paper discharge device 1. The control unit 12 includes a CPU, a RAM, a ROM, a hard disk, and the like. The control unit 12 also controls the operation of the printing apparatus in which the paper discharge device 1 is provided.

  Next, the operation of the paper discharge device 1 will be described.

  The paper discharge operation of the paper discharge device 1 is performed according to the printing operation in the printing device. When printing is started by the printing apparatus, the control unit 12 sets the positions of the paper discharge wings 7A and 7B and the ribs 10A and 10B according to the size (paper width) of the paper P to be printed and discharged. . The positions of the abutting members 9A and 9B are determined according to the positions of the paper discharge wings 7A and 7B.

  Here, in the paper discharge device 1, when paper of a predetermined size or larger is discharged, the paper wings 7A and 7B are stiffened. When paper of a small size less than the predetermined size is discharged, the paper wings 7A and 7B are not applied with a stiffness. The paper that is not squeezed is a paper having a paper width smaller than the minimum interval between the paper discharge wings 7A and 7B.

  For this reason, when the paper P to be discharged is a predetermined size or larger, the control unit 12 arranges the paper discharge wings 7A and 7B and the butting members 9A and 9B at positions corresponding to the paper size. Specifically, the control unit 12 changes the number of pulses corresponding to the paper size from the state where the paper discharge wings 7A and 7B are at the home position detected by a home position sensor (not shown). Drive for minutes. In this case, the ribs 10A and 10B are maintained at the home position.

  When the discharged paper P is less than a predetermined size, the control unit 12 arranges the ribs 10A and 10B at positions corresponding to the paper size. Specifically, the control unit 12 drives the rib moving motor 11 by the number of pulses corresponding to the paper size from a state where the ribs 10A and 10B are at the home position detected by a home position sensor (not shown). . In this case, the paper discharge wings 7A and 7B and the butting members 9A and 9B are maintained at the home position.

  When the paper P is transported from the printing apparatus after the position setting of the paper discharge wings 7A and 7B and the ribs 10A and 10B is completed, the paper discharge roller 2 transports the paper P and discharges it to the paper discharge tray 5. To do.

  When the paper P to be discharged is a predetermined size or more, as shown in FIG. 4, the paper P is conveyed by the paper discharge roller 2 and both ends in the paper width direction are the discharge wings 7A and 7B. It is raised by the guide surface 7a. As a result, the paper P is discharged while being bent into a U-shape.

  The discharged paper P is landed on the paper discharge tray 5 as shown in FIG. Thereafter, the paper P slides along the inclination of the paper discharge tray 5. Then, as shown in FIGS. 6 and 7, the paper P strikes the abutting members 9A and 9B and the ribs 10A and 10B. At this time, as shown in FIG. 7, both ends of the paper P in the paper width direction abut against the abutting surfaces 9a of the abutting members 9A and 9B.

  The second and subsequent sheets of paper P that are continuously ejected land on the paper P stacked on the paper ejection tray 5, slide down on the paper P, and the butting members 9A and 9B and the ribs 10A and 10B. I hit it. In this way, the paper P is stacked on the paper discharge tray 5.

  As shown in FIG. 7, a gap is formed between the sheet P that abuts against the abutting members 9 </ b> A and 9 </ b> B and the ribs 10 </ b> A and 10 </ b> B and the regulation surface 6 a of the end fence 6. When the paper P hits the abutting members 9A and 9B and the ribs 10A and 10B, air escapes from this gap. As a result, the speed of the paper P that slides down is prevented from colliding with the next paper P, and the paper P can be prevented from leaning against the end fence 6.

  When the paper P to be discharged is of a small size less than a predetermined size, the paper P passes through the paper discharge wings 7A and 7B and is discharged to the paper discharge tray 5 by the paper discharge roller 2. The paper P discharged to the paper discharge tray 5 slides along the inclination of the paper discharge tray 5 and hits the ribs 10A and 10B as shown in FIG. Also in this case, air escapes from the gap between the paper P and the regulation surface 6 a of the end fence 6, and the speed of the sliding paper P becomes slow and collides with the next paper P, or the paper P hits the end fence 6. It can be suppressed from leaning on.

  As described above, in the paper discharge device 1, the abutting members 9A and 9B are integrated with the paper discharge wings 7A and 7B, and can be moved together with the paper discharge wings 7A and 7B. For this reason, even if the paper P to be discharged is an irregular size, the abutting members 9A and 9B are disposed at positions corresponding to the paper width together with the paper discharge wings 7A and 7B. As a result, it is possible to reduce the rotation of the paper P due to the end of the paper P protruding from the abutting member because the abutting member is disposed at a position not appropriate for the paper size. As a result, it is possible to reduce the deterioration of the paper discharge alignment.

  The abutting members 9A and 9B have abutting surfaces 9a formed over a predetermined range including the reference position K of the end of the paper P in the paper width direction. As a result, even if the paper P is misaligned in the left-right direction (paper width direction), it is possible to reduce the rotation of the paper P by receiving the edge of the paper P with the abutting surface 9a. As a result, it is possible to further reduce the deterioration of the paper discharge alignment.

  The paper discharge device 1 includes ribs 10A and 10B that are disposed between the abutting members 9A and 9B and are movable in the paper width direction. For this reason, the ribs 10A and 10B can be arranged at positions corresponding to the paper size for various sizes of small paper. Thereby, since the abutting member (rib) is disposed at a position not appropriate for the paper size, it is possible to reduce the rotation of the paper P due to the end of the paper P protruding from the abutting member. As a result, it is possible to reduce the deterioration of the paper discharge alignment when discharging small-size paper P.

  The ribs 10A and 10B may be configured to have an abutting surface having the same width as the abutting surface 9a of the abutting members 9A and 9B.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments. For example, some components may be deleted from all the components shown in the embodiment.

DESCRIPTION OF SYMBOLS 1 Paper discharge apparatus 2 Paper discharge roller 3 Paper discharge motor 4 Guide plate 5 Paper discharge stand 6 End fence 7A, 7B Paper discharge wing 8 Paper discharge wing movement motor 9A, 9B Abutting member 9a Abutting surface 10A, 10B Rib 11 Rib Moving motor 12 Control unit K Reference position

Claims (2)

A paper discharge unit for conveying and discharging the paper;
A paper discharge tray that is formed so as to be inclined such that the upstream side in the paper discharge direction by the paper discharge unit is lower than the downstream side, and the sheets discharged by the paper discharge unit are stacked;
A fence erected at the upstream end of the paper discharge stand in the paper discharge direction;
A pair of paper discharge wings that move in the paper width direction according to the paper width of the paper discharged by the paper discharge unit, and raise both ends of the paper in the paper width direction to curve the paper;
A sheet that slides along the inclination of the sheet discharge table, which is disposed on the surface of the fence on the sheet discharge table side, is integrated with each of the pair of sheet discharge wings and is movable in the sheet width direction. A pair of first abutting members applied ;
A sheet that is disposed on the surface of the fence on the sheet discharge table side between the pair of first abutting members in the sheet width direction and that is movable in the sheet width direction and slides down along the inclination of the sheet discharge table. And a pair of second abutting members against which the paper abuts .   2. The paper discharge according to claim 1, wherein each of the pair of first abutting members has an abutting surface formed over a predetermined range including a reference position of a position where the end of the sheet abuts in the sheet width direction. apparatus.