JP2010076919A - Medium side edge truing-up mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems with a medium side edge truing-up mechanism which includes a medium conveying passage having a medium having a reference part abutting on the side surface, and a side edge truing-up roller provided along the conveying passage and a press roller facing the side edge truing-up roller which are detachably installed and in which, after a medium is pressed between both rollers, the side end of the medium is moved to the medium abutting reference part by rotating the side edge truing-up roller wherein a holding forces of a high-rigidity medium and low-rigidity medium are the same, and if the holding force of the high-rigidity medium is increaed to stably and reliably true up, the low-rigidity medium is wrinkled and elastically deformed when the medium is held. <P>SOLUTION: A recess is formed in the peripheral surface of the side edge truing-up roller so that a press roller provided so as to face the side edge truing-up roller can press against the side edge truing-up roller by a spring. A projection larger in height than the depth of the recess formed in the side edge truing-up roller is formed on the peripheral surface on the press roller. The projection is brought into contact with the recess of the side edge truing-up roller, and gaps are formed at those positions other than the contact position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a paper sheet medium width adjusting mechanism for adjusting a medium abutting reference portion for positioning a medium in a printing apparatus, a reading apparatus, or the like.

In the conventional media width adjusting mechanism, the width-adjusting roller in which the convex portion and the concave portion are formed in a concavo-convex shape in the cross-sectional shape and the press roller having the concave portion in the cross-sectional shape are engaged with the concave portion of the press roller, It is a structure that horizontally moves the medium sandwiched between the media and abuts one side of the medium against the medium abutment reference surface.By moving the sandwiched medium with low rigidity while deforming it into a waveform, the medium itself is turned over. The structure does not cause breakage (see, for example, Patent Document 1).
JP 7-329381 A

However, in the above-described conventional technology, the clamping force is constant in a medium with high rigidity (thickness) and a medium with low rigidity (thinness), and stable and reliable width adjustment even in a medium with high rigidity. If the clamping force is increased in order to move the medium, the medium having low rigidity will be wrinkled and plastically deformed during clamping.
Furthermore, when the medium collides, when the medium collides with the medium abutting reference portion, the medium is buckled, and a print position shift, reading failure, or the like in the next processing portion is induced.

On the other hand, if the clamping force is weakened in accordance with a medium having low rigidity, the medium having high rigidity slips, and there is a problem that the width-shifting movement becomes uncertain.
An object of the present invention is to solve such a problem.

  Therefore, the present invention arranges a medium conveyance path having a medium abutting reference part on the side surface, a width adjusting roller provided along the conveyance path, and a press roller facing the width adjusting roller so as to be able to contact and separate. In the medium width adjusting mechanism that moves the side edge portion of the medium to the medium abutting reference portion by rotating the width adjusting roller after the medium is pressed by both rollers, a concave portion is formed on the peripheral surface of the width adjusting roller. The press roller provided to face the width adjusting roller can be pressed against the width adjusting roller by the force of the spring, and a convex portion having a height higher than the depth of the concave portion of the width adjusting roller is formed on the peripheral surface thereof. The convex portion is in contact with the concave portion of the width adjusting roller to form a gap other than the corresponding contact portion.

In the above configuration, the spring that presses the press roller operates in two stages.
Further, in the above configuration, a high friction member such as rubber is attached to desired locations around both sides of the recess of the width adjusting roller.

  In the present invention as described above, when a thin medium with low rigidity is narrowed to the medium abutting reference portion, the medium abutting reference is reduced by reducing the clamping force between the width-immobilizing roller and the press roller. It is possible to suppress the buckling and deformation of the medium without causing a strong collision with the portion. In addition, when a medium with high rigidity and a large thickness is brought close to the media abutment reference part, the slipping of the medium during movement is eliminated by increasing the clamping force between the width adjusting roller and the press roller. One side surface can be brought into contact with the medium abutting reference portion.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings using a medium conveyance device provided in a passbook slip printer.

FIG. 1 is an explanatory plan view of a medium conveying apparatus showing an embodiment, and FIG. 2 is a side explanatory view of the medium conveying apparatus.
In the figure, the medium conveying apparatus 1 is provided with a conveying path 2, and this conveying path 2 is configured by an upper guide plate 3 and a lower guide plate 4 being arranged with a space therebetween.
On one side of the lower guide plate 4, a medium abutment reference portion 5 that is a conveyance reference of the medium 30 is formed.

In FIG. 2, the left side of the conveyance path 2 is an insertion port 6 for the medium 30, and this insertion port 6 also serves as a discharge port.
Although media having different sizes are transported to the transport path 2, the width of the transport path 2 is formed wide so that any medium can be transported.
In the transport path 2, feed rollers 7a and 7b are rotatably arranged. The feed rollers 7a and 7b are rollers that convey the medium 30 in the direction of arrow A, and are driven to rotate by a pulse motor.

Press rollers 8a and 8b below the lower guide plate 4 are provided on the feed rollers 7a and 7b, respectively, so that they can be pressed against each other.
As shown in FIG. 2, the feed roller 7a and the feed roller 7b are attached to the shaft 9 so as to be in a direction orthogonal to the medium conveying direction, and rotate in the same direction when the shaft 9 is rotated by a pulse motor. Yes. The feed rollers 7a and 7b enter the conveyance path 2 through a through hole of the upper guide plate 3 (not shown), and press rollers 8a and 8b that enter through the through hole (not shown) of the lower guide plate 4 are pressed.

The press rollers 8a and 8b are provided to face the feed rollers 7a and 7b, respectively, and are attached to the shaft 10. The shaft 10 is provided so as to be movable up and down by a mechanism (not shown), and as described above, the press rollers 8a and 8b are pressed against the feed rollers 7a and 7b, respectively, when raised.
Further, the feed rollers 11a and 11b are rotatably provided at positions separated from the feed rollers 7a and 7b by a predetermined distance in the transport direction (arrow A direction). The feed rollers 11a and 11b are also attached to the shaft 13 and enter the conveyance path 2 through a through hole of the upper guide plate 3 (not shown) and are pressed against the press rollers 12a and 12b, respectively.

The press rollers 12a and 12b are attached to the shaft 14, and the shaft 14 is disposed so as to be movable up and down by a mechanism (not shown). The press rollers 12a and 12b enter the conveyance path 2 through a through hole of the lower guide plate 4 (not shown).
The width adjusting roller 15 is located at a position away from the feed rollers 7a and 7b by a predetermined distance in the conveying direction.
Is provided. In this embodiment, a plurality of types of media having different sizes are conveyed. However, the width adjusting roller 15 can adjust the minimum medium even when the smallest medium that can be handled by the apparatus is conveyed. It is provided in a position. Therefore, any size medium passes through the position of the width adjusting roller 15.

The width adjusting roller 15 is disposed so as to move the medium 30 in a direction orthogonal to the conveyance direction of the medium 30 and enters the conveyance path 2 from a through hole (not shown) of the upper guide plate 3.
The width adjusting roller 15 has a substantially drum shape having a recess 15a in the middle of the circumferential surface, and high friction members 23a and 23b such as rubber are provided around both sides of the recess 15a. The phase is 180 degrees out of phase with the member 23b.

  A press roller 16 is provided to face the width adjusting roller 15. The press roller 16 is formed with a convex portion 16a having a height on the circumferential surface so as to be in contact with the concave portion 15a of the width adjusting roller 15 and form a gap 24 other than the corresponding contact portion. That is, the height of the convex portion 16 a of the press roller 16 is higher than the depth of the concave portion 15 a of the width adjusting roller 15. Such a press roller 16 is attached to a leaf spring 19 around a roller fulcrum shaft 18 as shown in FIGS.

  The leaf spring 19 is attached to a guide plate 26. The guide plate 26 is rotatable about the axis of a fixed bracket 20 attached to a main body (not shown), and is a cam shaft provided near the fixed bracket 20. The cam 25 is rotated by means (not shown) with the rotation shaft 27 as a rotating shaft, and the cam outer peripheral surface is brought into pressure contact with the guide plate 26 so that the tip of the guide plate 26 can be moved up and down.

  Further, a tension bracket 21 is rotatably provided with the axis of the fixed bracket 20 as a fulcrum, the tension bracket 21 has a stopper 21a at the tip, and a spring 22 is attached between the guide plate 26 and the tension bracket 21. , A force directed upward is always applied to the tension bracket 21. The bottom surface of the leaf spring 19 comes into contact with the stopper 21a.

  Therefore, when the leaf spring 19 is rotated downward by the rotation of the cam 25, the bottom surface of the leaf spring 19 hits the stopper 21a of the tension bracket 21 by the tension force of the spring 22, and the leaf spring 19 and the tension bracket 21 are pressed against each other. As a result, the force applied upward by the press roller 16 is greater than when the pressure roller 16 is not pressed. The press roller 16 enters the conveyance path 2 through a through hole of the lower guide plate 4 (not shown).

  The relationship between the width adjusting roller 15 and the press roller 16 is that when the press roller 16 is lifted, the medium 30 having a high degree of rigidity is caused by the above pressure to cause the high friction member 23b (23a) of the width adjusting roller 15 to move. ) And the press roller 16 press the medium 30, and as shown in FIG. 8, the medium 30 having low rigidity is pressed against the concave portion 15 a of the width adjusting roller 15 by the convex portion 16 a of the press roller 16, and there is a gap 24. The high friction member 23b (23a) is not pressed against. Thereby, the medium with higher rigidity is held by a stronger clamping force.

An insertion detection sensor 17 is installed downstream of the feed rollers 7a and 7b in the transport direction and upstream of the width adjusting roller 15 in the transport direction.
The insertion detection sensor 17 detects the leading end of the medium inserted in the transport path 2 and is arranged at a position for detecting any size medium.
Width adjustment completion detection sensors 28 and 29 are provided in the medium abutment reference portion 5 of the conveyance path 2. The width adjustment completion detection sensors 28 and 29 detect that one side end of the medium is pressed against the medium abutting reference portion 5 and are arranged along the medium abutting reference portion 5 at regular intervals. ing.

The operation of the above configuration will be described.
The operation of each unit described below is controlled by a control unit (not shown) based on a program (software) stored in a storage unit (not shown).
Before the medium 30 is inserted into the conveyance path 2, the press rollers 8a and 8b and the press rollers 12a and 12b are separated from the feed rollers 7a and 7b and the feed rollers 11a and 11b.

  When the medium 30 is inserted into the conveyance port 2 and conveyed in this state, the leading end portion of the medium 30 is detected by the insertion detection sensor 17. By this detection, the press rollers 8a and 8b and the press rollers 12a and 12b are lifted by driving means (not shown), and the vicinity of the front end of the medium 30 is sandwiched between the feed rollers 7a and 7b and the press rollers 8a and 8b. The pulse motor that drives the feed rollers 7a and 7b by this clamping is driven by a predetermined number of pulses under the control of a control unit (not shown) by the detection of the insertion detection sensor 17, and the medium 30 is conveyed in the direction of arrow A to The driving stops and the conveyance of the medium 30 stops. At this time, the width adjusting roller 15 is separated from the press roller 16.

Therefore, the press roller 16 is raised by a driving means (not shown), and the medium 30 is clamped by the width adjusting roller 15. Then, the press rollers 8a and 8b and the press rollers 12a and 12b are lowered by a driving unit (not shown) and separated from the feed rollers 7a and 7b and the feed rollers 11a and 11b.
At this time, the medium 30 with low rigidity is sandwiched by the pressure contact force of only the leaf spring 19 as shown in FIG. 5, and the medium 30 with high rigidity is pressed against the pressure force of the leaf spring 19 and the spring as shown in FIG. The tension bracket 21 is clamped by the pressing force of the tension bracket 21 by the total of the tensile forces of 22. Accordingly, each of the pressure contact force of the leaf spring 19 and the tension force of the spring 22 and the total force of both are set to be weak rather than a large force that forcibly deflects the medium 30 having high rigidity. .

  Therefore, in each of the above sandwiched states, first, the medium 30 having high rigidity does not bend greatly even by the pressure contact force of the sum of the pressure contact force of the leaf spring 19 and the tension force of the spring 22 as shown in FIGS. As shown in FIGS. 5 and 8, the medium 30 having low rigidity is sandwiched in a state of being pressed against the high friction member 23 b (23 a) provided on the shift roller 15 by the press roller 16. The convex portion 16a of the press roller 16 is in pressure contact with the concave portion 15a, and the other portions are gaps 24. Therefore, the medium 30 having a higher rigidity has a stronger clamping force.

Therefore, a control unit (not shown) drives the driving motor for the width adjusting roller 15 to rotate the width adjusting roller 15. As a result, the medium 30 moves in the direction of arrow B in FIG.
When the medium 30 is width-adjusted and pressed against the medium abutment reference portion 5, the width-alignment completion detection sensors 28 and 29 detect the medium 30. Both width adjustment completion detection sensors 28 and 29 confirm the detection signal that the medium 30 is detected, and the control unit is in a state in which one side (right side in the drawing) of the medium 30 is applied, that is, skewing. Therefore, the control unit stops the rotation of the driving motor of the width adjusting roller 15 and stops the movement of the width adjusting roller 15. Thus, the width aligning operation is finished.

Thereafter, the press rollers 8a and 8b and the press rollers 12a and 12b are raised again to sandwich the medium 30 and the press roller 16 is lowered, and then the feed rollers 7a and 7b and the feed rollers 11a and 11b are used as shown in FIG. Processing such as printing and reading is performed by conveying in the direction of arrow A.
According to the present embodiment described above, when a thin medium with low rigidity is thinned to the medium abutting reference portion, the medium abutting is achieved by reducing the clamping force between the widthing roller and the press roller. The medium can be prevented from buckling or deforming without strongly colliding with the reference portion.

  In addition, when a medium with high rigidity and a large thickness is brought close to the media abutment reference part, the slipping of the medium during movement is eliminated by increasing the clamping force between the width adjusting roller and the press roller. One side surface can be brought into contact with the medium abutting reference portion.

Plane explanatory drawing of the medium conveying apparatus showing an embodiment Side surface explanatory drawing of the medium conveying apparatus which shows an Example Illustration of operating state Illustration of press roller Explanatory drawing of a state where a medium is sandwiched Explanatory drawing of a state where a medium is sandwiched Explanatory drawing of a state where a medium is sandwiched Explanatory drawing of a state where a medium is sandwiched

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Medium conveyance apparatus 2 Conveyance path 3 Upper guide plate 4 Lower guide plate 5 Medium contact reference | standard part 6 Insertion port 7a, 7b Feed roller 8a, 8b Press roller 9 Shaft 10 Shaft 11a, 11b Feed roller 12a, 12b Press roller 13 Shaft DESCRIPTION OF SYMBOLS 14 Shaft 15 Width-adjusting roller 15a Concave part 16 Press roller 16a Convex part 17 Insertion detection sensor 18 Roller fulcrum shaft 19 Leaf spring 20 Fixed bracket 21 Tension bracket 21a Stopper 22 Spring 23a, 23b High friction member 24 Gap 25 Cam 26 Guide plate 27 Cam Axis 28, 29 Width-adjustment completion detection sensor 30 Medium

Claims (3)

A medium conveyance path having a medium abutting reference portion on the side surface, a width adjusting roller provided along the conveyance path, and a press roller facing the width adjusting roller are provided so as to be able to contact and separate. Thereafter, in the medium width adjusting mechanism for moving the side edge portion of the medium to the medium abutting reference portion by rotating the width adjusting roller,
A recess is formed in the peripheral surface of the width adjusting roller, and the press roller provided to face the width adjusting roller can be pressed against the width adjusting roller by the force of the spring, and the depth of the concave portion of the width adjusting roller is set on the peripheral surface. And a convex portion having a height higher than the height, and the convex portion abuts against the concave portion of the width adjusting roller to form a gap other than the corresponding contact portion. 2. The medium width adjusting mechanism according to claim 1, wherein the spring pressing the press roller operates in two stages. 2. A medium width adjusting mechanism according to claim 1, wherein a high friction member such as rubber is attached to desired locations around both sides of the concave portion of the width adjusting roller.

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