JP5578947B2 - Paper transport device - Google Patents

Description

  The present invention relates to a sheet conveying apparatus that conveys sheets one by one.

  In order to convey a sheet to a predetermined position, a conventional sheet conveying apparatus has a conveying sheet facing a guide wall so that one side edge of the conveying sheet is along the guide wall as shown in Patent Document 1. An oblique conveyance belt is provided that conveys the sheet downstream in the conveyance direction while conveying the sheet obliquely.

JP 2005-314056 A

  Since the skew conveying belt can convey paper of various specifications, especially when conveying thin paper, the conveying force of the skew conveying belt becomes too strong so that the leading edge of the paper rides on the guide wall. As a result, the leading edge of the paper may be damaged.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a paper transport device that can prevent the leading edge of the paper from being damaged by the guide wall while transporting the paper along the guide wall.

  According to the present invention, a sheet conveying device is configured to convey a sheet obliquely toward the guide wall so that the sheet is loaded on the guide wall extending in the sheet conveying direction and the edge of the sheet is along the guide wall. A skew feeding means for feeding the paper downstream in the carrying direction; and a pressing member for applying a load from above the paper to the paper being conveyed by the skew feeding means. To do.

  According to the above configuration, the pressing member applies a load from above the sheet to the sheet being conveyed by the skew conveying unit, and thus the sheet rotates around the pressing member. As a result, the sheet comes along the guide wall, and the leading edge of the sheet due to the guide wall can be prevented from being damaged.

The present invention preferably further comprises the following configuration.
(1) The pressing member applies a load to the paper at a predetermined distance from the guide wall, and the predetermined distance is half of the paper width length in the direction orthogonal to the paper transport direction. It is set above.
(2) The pressing member applies a load to the sheet between the upstream end in the sheet conveying direction and the downstream end in the sheet conveying direction of the skew conveying unit.
(3) It has a retracting mechanism for retracting the pressing member in a state where no load is applied to the sheet.
(4) The pressing member is a flexible plate member.
(5) The pressing member is a spherical member.
(6) In the configuration (4), the plate-like member has a corner portion formed by being bent, and the corner portion extends in a direction orthogonal to a sheet conveyance direction, and the plate The shaped member comes into contact with the sheet at the corner.

  According to the configuration (1), since the position where the pressing member applies a load to the paper, that is, the rotational center position of the paper is within the predetermined range, the paper can be appropriately rotated with respect to the guide wall. It is possible to reliably prevent the leading edge of the paper from being damaged by the guide wall.

  According to the configuration (2), since a load is applied to the sheet on the skew conveying means, the sheet can be appropriately rotated with respect to the guide wall, and damage to the leading end of the sheet due to the guide wall can be reliably prevented. .

  According to the configuration (3), when the leading end of the sheet passes through the pressing member, the pressing member is retracted by the retracting mechanism so that no load is applied to the sheet, thereby preventing the jamming of the leading end of the sheet by the pressing member. it can. Further, when the paper is rotated by the load applied by the pressing member and the paper comes to follow the guide wall, the paper is excessively removed by retracting the pressing member in a state in which no load is applied to the paper by the retracting mechanism. It can prevent turning.

  According to the configuration (4), since the pressing member has flexibility, it is possible to prevent a jam at the leading end of the sheet and to follow the movement of the sheet being conveyed.

  According to the configuration (5), since the pressing member is spherical, it can come into contact with the paper at a point, and the paper can be smoothly rotated.

  According to the configuration (6), since the pressing member linearly contacts the paper in the direction orthogonal to the paper transport direction, the paper can be rotated so that it can be more easily along the guide wall. .

  In short, according to the present invention, it is possible to prevent the leading edge of the sheet from being damaged by the guide wall while conveying the sheet along the guide wall.

1 is a schematic plan view of a sheet conveying device according to an embodiment of the present invention. It is the II-II cross-sectional schematic of FIG. It is an enlarged view of the pressing means of FIG. It is an enlarged view of the press part of FIG. It is the schematic explaining the action | operation of a pressing means. It is the schematic explaining the action | operation of a pressing means. FIG. 6 is a schematic top view of a skew conveying means portion that conveys a sheet according to another embodiment. It is VIII-VIII sectional drawing of FIG.

  FIG. 1 is a schematic plan view of a sheet conveying apparatus 1 according to an embodiment of the present invention. The sheet conveying apparatus 1 includes a suction conveying means 2 positioned upstream in the sheet conveying direction (arrow A direction) and a skew conveying means 3 positioned downstream, and are configured in plan view. Has a rectangular appearance.

  FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. The suction conveyance means 2 attracts the paper 100 placed on the paper placement table 20 to the endless belt 23 stretched around the pair of rollers 21 and 22 one by one by suction means (not shown). It is adsorbed and transported. The endless belt 23 is provided in parallel with the paper transport direction.

  The skew conveying means 3 conveys the paper 100 conveyed by the suction conveying means 2 on an endless belt 33 that is stretched around a pair of rollers 31 and 32. The endless belt 33 is provided with a slight inclination (angle θ shown in FIG. 1) toward the guide wall 4 side with respect to the sheet conveyance direction. Therefore, in the skew feeding means 3, the sheet is conveyed while being pushed toward the guide wall 4, so that the edge of the sheet is conveyed in the arrow A direction along the guide wall 4.

  Above the skew conveying means 3, a pressing means 5 is provided for applying a weight from above the conveyed paper 100. FIG. 3 is an enlarged view of the pressing means 5. The pressing means 5 is provided at a pressing portion 51 that applies a load to the paper 100, an arm portion 52 that supports the pressing portion 51, and one end portion of the arm portion 52, and the frame 11 of the paper conveying device 1 (FIGS. 1 and 2). ) And a base end portion 53 that is supported by the above. The frame 11 extends in the paper width direction (X direction) orthogonal to the paper transport direction (arrow A direction), and the base end portion 53 is driven along the frame 11 by the driving means (not shown). It can move in the direction. Therefore, when the base end portion 53 moves in the X direction, the pressing means 5 moves in the X direction along the frame 11. The pressing portion 51 is located below the arm portion 52, and applies a load to the paper 100 between the upstream end 3a in the paper transport direction and the downstream end 3b in the paper transport direction of the skew feeding means 3. Yes.

  FIG. 4 is an enlarged view of the pressing portion 51 of FIG. 3, and is a view visualizing the inside of the arm portion 52. The pressing portion 51 includes a pressing member 511 that comes into contact with the paper, an attachment member 512 to which the pressing member 511 is attached, an expansion / contraction member 513 that can expand and contract in the Y direction, which is a direction parallel to the paper transport direction (arrow A direction), And a drive member 514 that supports the elastic member 513 and expands and contracts the elastic member 513. A part of the mounting member 512, the telescopic member 513 and the driving member 514 are provided inside the arm portion 52, and the driving member 514 is fixed to the inner bottom surface of the arm portion 52. The pressing member 511 is actuated by the mounting member 512, the expansion / contraction member 513 and the driving member 514, and the mounting member 512, the expansion / contraction member 513 and the driving member 514 put the pressing member 511 in a state where no load is applied to the paper. A retraction mechanism for retreating is provided.

  The pressing member 511 is attached to the lower surface of the attachment member 512, and is composed of a flexible plate material. The pressing member 511 is preferably made of a resin, rubber, or the like in order to have flexibility, and more preferably made of a resin having a relatively low friction coefficient because it is in contact with the paper 100. . The pressing member 511 is bent so as to protrude downward at the corner portion 511a. The corner portion 511a has a linear shape extending in the X direction, and the corner portion 511a contacts the paper 100 with a line.

  The attachment member 512 is attached to the distal end of the elastic member 513 and is configured to be rotatable about a fulcrum 512a.

  When the drive member 514 expands / contracts the expansion / contraction member 513 in the Y direction by a solenoid provided therein, the attachment member 512 attached to the tip of the expansion / contraction member 513 rotates about the fulcrum 512a, and the attachment member 512 A pressing member 511 attached to the lower surface moves in the vertical direction. As a result, the pressing member 511 applies a load to the paper 100 positioned below the pressing member 511, or retreats above the paper 100 and does not apply a load to the paper 100.

  5 and 6 are schematic diagrams for explaining the operation of the pressing means 5. As shown in FIGS. 1 and 2, the paper 100 placed on the paper placement table 20 is sent to the skew feeding means 3 by the suction conveyance means 2. When the leading end of the sheet 100 in the sheet conveying direction reaches the skew conveying unit 3, the pressing unit 5 moves in the X direction along the frame 11 toward the guide wall 4. Then, as shown in FIG. 5, the pressing means 5 stops at a position where the weight is applied to the paper 100 at a point where the pressing member 511 is separated from the guide wall 4 in the X direction by half or more of the paper width length W.

  Since the endless belt 33 is inclined by the angle θ toward the guide wall 4 side with respect to the paper transport direction, the paper 100 transported by the skew transport means 3 is the leading edge of the edge on the guide wall 4 side. The part 100a is conveyed while being inclined toward the guide wall 4 so that the part 100a contacts the guide wall 4.

  When the drive member 514 extends the expansion / contraction member 513 in the Y direction, the attachment member 512 rotates in the R1 direction (FIG. 4) about the fulcrum 512a, and the pressing member 511 moves downward. Then, the pressing member 511 applies a weight to the leading end portion 100b of the sheet 100 being conveyed by the skew conveying means 3 in the vicinity of the edge opposite to the guide wall 4. The leading end portion 100b is located at a position away from the guide wall 4 by more than half of the sheet width length W in the X direction. When the pressing member 511 applies a load to the leading end portion 100b, the sheet 100 rotates in the R2 direction around the center 100b and is conveyed along the guide wall 4 as shown in FIG.

  When the paper 100 is transported along the guide wall 4, the driving member 514 contracts the telescopic member 513 in the Y direction. As a result, the mounting member 512 rotates about the fulcrum 512a in the R3 direction opposite to the R1 direction, and the pressing member 511 moves upward. Then, the pressing member 511 releases the pressing on the paper 100.

  According to the sheet conveying apparatus 1 having the above-described configuration, the following effects can be exhibited.

  Since the pressing member 511 applies a load from above the paper 100, the paper 100 rotates around the pressing member 511. As a result, the paper 100 comes along the guide wall 4, and damage to the front end of the paper due to the guide wall 4 can be prevented.

  The pressing member 511 applies a load to the paper 100 at a point separated from the guide wall 4 by more than half of the paper width length W in the X direction, so that the rotation center position of the paper 100 is within a predetermined range. Thus, the paper 100 can be appropriately rotated with respect to the guide wall 4, and damage to the leading edge of the paper due to the guide wall 4 can be reliably prevented.

  The pressing member 511 applies a load to the paper 100 between the upstream end 3a in the paper conveyance direction and the downstream end 3b in the paper conveyance direction of the skew conveying means 3, so that the rotation of the paper 100 with respect to the guide wall 4 is performed. Accordingly, the leading edge of the sheet due to the guide wall 4 can be reliably prevented.

  Since the pressing member 511 can be retracted upward by the mounting member 512, the expansion / contraction member 513 and the driving member 514, when the leading end of the paper passes through the pressing member 511, the pressing member is retracted upward. It is possible to prevent jamming of the front end of the sheet due to the pressing member. Further, when the paper 100 is rotated by the load applied to the pressing member 511 and the paper 100 comes along the guide wall 4, the paper 100 is excessively rotated by retracting the pressing member 511 upward. Can be prevented.

  Since the pressing member 511 has flexibility, it is possible to prevent a jam at the leading end of the sheet and to follow the movement of the sheet 100 being conveyed.

  The corner portion 511a of the pressing member 511 has a linear shape extending in the X direction, and the corner portion 511a abuts the sheet 100 with a line, so that the sheet 100 is rotated so that the guide wall 4 can be more easily along. be able to.

  If the sheet 100 is thick and there is no possibility that the leading end portion of the sheet 100 is damaged by the skew feeding means 3, the pressing member 511 does not need to apply a weight to the sheet 100. Therefore, according to the specification (thickness) of the paper 100, the pressing member 511 may be configured to control the operation of the pressing unit 5 so as to apply a weight to the paper 100 or retreat upward. .

  In the above embodiment, the pressing portion 51 includes the pressing member 511, the mounting member 512, the expansion / contraction member 513, and the driving member 514, and the retraction mechanism that retreats the pressing member 511 to a state where no load is applied to the paper. Have. However, the pressing member 511 may be directly attached to the arm portion 52, and the pressing member 511 may be configured to be positioned at a vertical position where a load is always applied to the paper. Even in this case, the pressing member 511 has flexibility and is bent so as to protrude downward at the corner portion 511a, so that the jamming of the front end portion of the sheet by the pressing member 511 does not occur. . And in this embodiment, the structure of the press part 51 can be simplified.

(Another embodiment)
In the above embodiment, the pressing member 511 has a plate shape, but as shown in FIGS. 7 and 8, the pressing member 518 may be spherical. FIG. 7 is a schematic top view of the skew conveying means 3 during conveyance of the paper 100 when the pressing member 518 is spherical, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. The pressing member 518 includes a spherical ball 518a and a holding body 518b that holds the ball 518a. The ball 518a is surrounded by a holding body 518b so that it can freely rotate, and the holding body 518b is attached to an attachment member 512 via an arm or the like (not shown). The vertical movement of the pressing member 518 is performed in the same manner as the vertical movement of the pressing member 511. Unlike the pressing member 511 that makes contact with the sheet 100 with a line, the pressing member 518 makes contact with the sheet 100 at a point 100c. The ball 518a is preferably made of an elastic material such as rubber, a resin material, or the like so that appropriate friction for rotating the paper 100 occurs between the ball 518a and the paper 100.

  In the another embodiment, the pressing member 518 abuts on the paper 100 at the point 100c, so that the paper 100 can be rotated more smoothly around the point 100c.

  The present invention is not limited to the configuration described in the above embodiment, and can include various modifications that can be considered by those skilled in the art without departing from the content described in the claims.

  In the present invention, a paper transport device that can prevent the leading edge of the paper from being damaged by the guide wall while transporting the paper along the guide wall can be provided.

DESCRIPTION OF SYMBOLS 1 Paper conveyance apparatus 11 Frame 2 Adsorption conveyance means 20 Paper mounting base 21 Roller 22 Roller
Reference Signs List 23 endless belt 3 skew feeding means 31 roller 32 roller 33 endless belt 4 guide wall 5 pressing means 51 pressing part 52 arm part 53 base end part 511 pressing member 512 mounting member 513 telescopic member 514 driving member 518 pressing member 100 paper

Claims (6)

A guide wall extending in the paper transport direction;
A skew conveying means for loading the paper and conveying the paper toward the downstream in the conveying direction while conveying the paper obliquely toward the guide wall so that the edge of the paper follows the guide wall;
A pressing member that applies a load from above the sheet to the sheet being conveyed by the skew conveying means,
The pressing member has a single pressing portion, and applies a load to the paper at a position away from the guide wall by a predetermined distance,
The paper conveying apparatus according to claim 1, wherein the predetermined distance is set to be not less than half of a paper width length in a direction orthogonal to the paper conveying direction . The paper conveying apparatus according to claim 1 , wherein the pressing member applies a load to the paper between an upstream end in the paper conveying direction and a downstream end in the paper conveying direction of the skew conveying means. The sheet conveying apparatus according to claim 1 , further comprising a retracting mechanism configured to retract the pressing member in a state where no load is applied to the sheet. The paper conveying apparatus according to claim 1 , wherein the pressing member is a flexible plate-like member. The paper conveying apparatus according to claim 1 , wherein the pressing member is a spherical member. The plate-like member has a corner portion formed by bending,
The corner extends in a direction perpendicular to the paper transport direction,
The sheet conveying device according to claim 4 , wherein the plate-shaped member is configured to come into contact with a sheet at the corner portion.

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