JP2006160430A - Recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve work efficiency in incorporating a pickup roller rubber in a pickup roller member, to facilitate visual confirmation for the direction of polishing grain even after incorporation, and to heighten the quality check accuracy after improvement in work efficiency and incorporation. <P>SOLUTION: A substantially triangular mark indicating the direction of polishing grain is applied to part of the outer periphery of the pickup roller rubber, whereby even after assembling, the direction of polishing grain can be easily confirmed by visual confirmation. Especially in the case of the pickup roller member having a D-shaped sectional form, incorporation is performed so that the position of the mark is positioned in the D-cut part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording apparatus that performs recording on a sheet material (recording paper) by scanning a recording head in accordance with image information.

  2. Description of the Related Art Conventionally, a recording apparatus such as an ink jet has an ASF (Auto Sheet Feed) mechanism, and is a sheet material feeding unit that automatically separates and conveys sheets one by one from a recording sheet that is a plurality of mounted sheet materials. There are many devices in which a hollow cylindrical rubber member is inserted on the outer periphery of a pickup roller member, which is a means, and the recording paper is separated using the frictional force of the rubber member.

  The surface shape of the rubber member is roughly divided into a “knurl” type and a “polishing” type, and there are cases in which one is adopted depending on the specifications of the apparatus, particularly in the case of the polishing type, the rubber member The direction of polishing (polishing eyes) occurs because of the method of rotating and polishing by attaching to the processing tool, but when the pickup roller is mounted on the main body, the pickup roller is used during the paper transport operation to stabilize the separation performance. There are many models in which the direction of rotation of rubber matches the direction of rotation during the polishing process.

  However, it is often difficult to determine the direction of the polishing eye in appearance, for example, marking the side surface of the rubber member with ink or laser, and determining the polishing direction based on the direction of the marked surface, or In general, a concave triangular mark is provided on the inside of the hollow rubber, and when the rubber member is incorporated into the pickup roller member, a method of working while checking the index is generally performed.

As another conventional example, Patent Document 1 can be cited.
JP-A-8-208043

  However, in the conventional recording apparatus, for example, when marking is performed with ink, the marking may disappear.

  In addition, although it is unlikely that the marking by the laser will disappear, it is necessary to make an equipment investment, and this investment has a problem of affecting the part cost.

  In addition, when the inside of the hollow cylindrical rubber member is engraved, the cost does not increase, and it is possible to check the direction of the polishing eye even during the assembly work, but once the rubber member is incorporated into the pickup roller member After that, since it is impossible to check from the exterior, there is a problem that it is not easy to check whether the incorporation is correctly performed.

  According to the present invention, it is possible to improve the workability when incorporating the pickup roller rubber into the pickup roller member by marking a part of the outer periphery of the pickup roller rubber with a substantially triangular shape or the like indicating the direction of the polishing marks. Needless to say, it is possible to easily visually confirm the direction of the polishing eye even after incorporation, and it is possible to improve workability and improve the quality check accuracy after incorporation.

  In particular, when the pickup roller member has a D-cut cross-sectional shape, the recording sheet and the stamp contact each other even if the stamp is convex by incorporating the stamp so that the stamp is positioned at the D-cut portion. It is possible to make the structure not to be used, and since the engraved portion can be engraved in the mold structure for rubber molding, the structure of the mold is simplified, and there is an advantageous effect in terms of cost and quality.

  As described above, according to the present invention, not only when the pickup roller rubber is incorporated into the pickup roller member by marking a part of the outer periphery of the pickup roller rubber with a triangular shape indicating the polishing direction. Therefore, it is possible to easily visually confirm the direction of the polishing eye even after the assembly, and it is possible to improve workability and improve the quality check accuracy after the assembly.

  In particular, when the pickup roller member has a D-cut cross-sectional shape, the recording sheet and the stamp contact each other even if the stamp is convex by incorporating the stamp so that the stamp is positioned at the D-cut portion. It is possible to make the structure not to be used, and since the engraved portion can be engraved in the mold structure for rubber molding, the structure of the mold is simplified, and there is an advantageous effect in terms of cost and quality.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First embodiment>
An embodiment of the present invention will be described with reference to FIGS.

  First, the basic configuration of this embodiment will be described with reference to FIG.

  FIG. 1 is an external perspective view showing a basic configuration of the present invention. 1 is a pinch roller holder, 2 is a chassis, 3 is a pinch roller, 4 is a sheet detection sensor, 5 is an LF motor, 6 is an LF gear, and 7 is LF. Roller, 8 is a platen, 9 is an LF transmission (two-stage) gear, 10 is an LF roller bearing L, 11 is an LF roller bearing R, 12 is a discharge roller, 13 is a discharge pulley, 14 is a discharge bearing R, 15 Is a paper discharge bearing L, 16 is a spur, 17 is a paper discharge belt, 18 is an idle pulley, 19 is a tension pulley, 21 is a recording head, 22 is a pickup roller unit, 23 is a pressure plate, 24 is an ASF motor, and 26 is an ASF base. , 27 are separating members.

  A friction member 7a made of ceramic particles or the like is applied to a part of the LF roller 7 composed of a metal shaft by spraying or electrostatic coating. The pinch roller holders 1 are respectively provided at positions corresponding to the friction member 7a. A plurality of pinch rollers 3 are rotatably attached. The pinch roller holder 1 is attached to the apparatus main body so as to be rotatable around a rotation shaft (not shown), and a pinch roller spring (not shown) holds the pinch holder 1 in place. By urging from below, the pinch roller 3 is urged by an appropriate spring force to the LF roller 7 rotatably attached to the apparatus main body, and the recording paper is held downstream by sandwiching the recording paper and rotating in cooperation. Transport in the direction.

  An LF bearing R is attached to the right end portion of the LF roller 7 and an LF bearing L is attached to the left end portion, and the LF roller is rotatably supported.

  A large-diameter LF gear 6 is attached to the left end portion of the LF roller and rotates integrally with the LF roller 7, and the rotational force of the LF motor 5 is transmitted to the large gear of the LF transmission gear 9 via the motor gear 5a. Power is transmitted to the LF roller 7 that rotates integrally with the LF gear through a small gear that is formed concentrically with the large gear.

  A paper discharge roller 12 is rotatably supported by a recording device by a paper discharge bearing R and a paper discharge bearing L downstream of the LF roller, and a plurality of paper discharge roller rubbers 12a are integrally formed on the paper discharge roller 12. The spur 16 attached rotatably to a spur attachment member (not shown) and the recording paper are pinched and cooperatively rotate.

  A paper discharge pulley 13 is attached to the left end portion of the paper discharge roller 12 so as to rotate integrally. Between the pulley portion 9 a provided concentrically with the LF transmission gear 9 and the paper discharge pulley 13. A sheet discharge belt 17 is placed on the sheet, and the rotation of the LF transmission gear is transmitted to the sheet discharge roller 12 via the sheet discharge pulley 13 by the sheet discharge belt 17, and the sheet is moved downstream by the LF roller 7 and the sheet discharge roller 12. The recording operation is performed by selectively ejecting ink dots from the nozzle portion of the recording head 21 onto the recording paper.

  The LF roller 7 is installed on the upper surface side of the recording paper. The rotation of the motor gear 5a in the CCW direction is transmitted to the CW rotation of the LF transmission gear 9, and further the rotation is transmitted in the CCW rotation direction of the LF gear. 7 rotates in the CCW direction to convey the recording paper in the downstream direction.

  On the other hand, the discharge roller 12 is installed on the lower surface side of the recording paper, and the rotation of the motor gear 5a in the CCW direction is transmitted to the CW rotation of the LF transmission gear 9, and this rotation is transferred to the discharge roller by the discharge belt 17. It is transmitted as CW rotation.

In FIGS. 2 to 5, reference numeral 22 denotes a pickup roller unit. A pickup roller member 22f having a D-shaped cross section having a flat portion on a part of a cylinder is fixed to the pickup roller shaft 22b. A pickup roller rubber 22a having a hollow cylindrical shape is attached, and is fixed in accordance with the D shape of the pickup roller member 22f. (Fig. 5)
A pickup roller gear 22d is attached near the end of the pickup roller unit 22, and a pickup roller bearing 22c is inserted into the pickup roller shaft, and the pickup roller bearing 22c is attached to a support portion 2e provided in a part of the chassis. The pickup roller unit is rotatably supported by the chassis.

  An ASF motor 24 transmits power to the pickup roller gear 22d provided at the end of the pickup unit 22 via the ASF transmission gear train 25, and selectively rotates the pickup roller unit 22.

Reference numeral 26 denotes an ASF base, and a separation member 27 which is a sheet member having elasticity is attached to a part of the ASF base 26. (Fig. 4)
A pressure plate 23 is a sheet stacking unit, and is biased upward by a spring member (not shown). A protrusion 23 a is formed on a part of the pressure plate 23, and the pickup roller unit 22 has both ends. Abutting on the cam member 22e provided, the position of the abutting is changed by the rotation of the pickup roller, and the pressure plate 23 is driven up and down.

  In FIG. 7, the recording paper 28 is stacked on the pressure plate 23, and the front end of the paper is in a standby state while being in contact with the vicinity of the base of the separating member 27. At this time, since the D-cut portion (planar portion) of the pickup roller member is positioned on the stacked paper side, the top paper stacked and the pickup roller rubber 22a are not in contact with each other.

  When a drive signal is sent from the drive circuit to the ASF motor from this state, the pickup roller unit starts rotating, the pickup roller rubber 22a and the pickup roller cam 22e also start rotating, and the protrusion 23a of the pressure plate 23 and the pickup The contact state of the roller cam 22e is released, the pressure plate 23 is moved upward by a spring force, and the cylindrical portion of the pickup roller rubber 22a and the uppermost sheet of the recording paper 28 are brought into contact by the aforementioned spring force.

When the pickup roller rubber 22a further rotates, the uppermost paper of the recording paper 28 starts to move in the direction of the LF roller due to the frictional force of the rubber. The bottom few sheets start moving. (Fig. 8)
Further, when the pickup roller 22a rotates, the reaction force (separation action) applied to each sheet also changes as the recording sheet tip abuts against the separation member 27 described above to cause an angle change in the separation member 27 and get over the separation member 27. Since the resistance due to the reaction force applied to the uppermost sheet is the smallest, only the uppermost recording sheet is separated and conveyed toward the LF roller 7. (Fig. 9)
Further, after the pickup roller rotates and the uppermost recording sheet is conveyed in the direction of the LF roller and reaches the LF roller, it is pushed down by the projection 23a of the pressure plate 23 and the cam member 22e of the pickup roller unit 22 described above. When 23 is moved downward and the pickup roller unit makes one rotation from the standby state, the standby state shown in FIG. 7 is restored. In this state, the recording paper and the pickup roller rubber 23a are in a non-contact state, and no load is applied to the separated recording paper, so that it is possible to avoid affecting the print quality. (Fig. 10)
Next, the surface state of the pickup roller rubber 22a will be described.

  In general, the surface of the pickup roller rubber is roughly classified into a “knurl” type and a “polishing” type. Which one is used depends on the application, and the pickup roller rubber 22a of the present invention has a polishing type. The example used is shown.

  An effect of stabilizing the friction coefficient of the rubber surface is expected by forming the pickup roller rubber with a mold and polishing the outer periphery of the rubber as a finish.

  Polishing is generally performed by attaching a pickup roller rubber to a processing device, rotating the pickup roller rubber and bringing it into contact with a grindstone, which is a processing jig. Occurs.

When the pickup roller rubber 22a is mounted on the recording apparatus, the pickup roller unit is attached so that the rotation direction of the pickup roller unit coincides with the rotation direction at the time of polishing described above. (FIGS. 3 to 6)
In the present invention, as a means for easily discriminating the polishing eyes from the appearance, a substantially triangular concave marking 22g is formed at the time of molding on a part of the outer periphery of the pickup roller rubber 22a, and the direction of the apex of the triangle is the direction of the polishing eyes In the example, the marking 22g is incorporated so as to be positioned at the D-cut portion of the pickup roller member. (FIGS. 3 and 5)
<Second embodiment>
In the first embodiment described above, the shape of the inscription representing the polishing marks is a substantially triangular concave shape, but the direction can be determined by using another shape such as an arrow shape, for example, a number indicating a model number. If there is, there is no influence on the effect of the present invention.

<Third embodiment>
In the first and second embodiments described above, the inscription representing the polishing marks is concave, but even if it is convex, it does not affect the effect of the present invention.

1 is an external perspective view showing a basic configuration of the present invention. The side view showing the basic composition of the present invention in Drawing 1. FIG. 4 is a diagram illustrating a configuration of a pickup roller unit 22. The figure explaining ASF base 26 and separation member 27. FIG. 3 is a diagram for explaining a part of a pickup roller unit 22. The figure explaining grinding | polishing of the pick-up roller unit 22. FIG. The side view of the pickup roller unit 22 in the standby state and its periphery. The side view of the pick-up roller unit 22 in the movement start state and its periphery. FIG. 9 is a side view of the pickup roller unit 22 and its periphery when the pickup roller 22a is further rotated from the state of FIG. The figure at the time of returning to the standby state shown in FIG. 7 from the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pinch roller holder 2 Chassis 3 Pinch roller 4 Paper detection sensor 5 LF motor 6 LF gear 7 LF roller 8 Platen 9 LF transmission gear 10 LF roller bearing L
11 LF roller bearing R
12 Paper discharge roller 13 Paper output pulley 14 Paper output bearing R
15 Paper discharge bearing L
16 Spur 17 Discharge Belt 18 Idle Pulley 19 Tension Pulley 20 Discharge Pressing Unit 21 Recording Head 22 Pickup Roller Unit 23 Pressure Plate 24 ASF Motor 25 ASF Transmission Gear 26 ASF Base 27 Separating Member 28 Recording Paper

Claims (2)

Sheet stacking means for stacking a plurality of sheet materials;
A sheet material feeding means for contacting and feeding the sheet material loaded on the sheet stacking means;
In the recording apparatus provided with a hollow cylindrical rubber member whose outer periphery is processed by polishing as the sheet material feeding means,
2. A recording apparatus according to claim 1, wherein a part of an outer periphery of the rubber member is stamped to display a direction of a polishing mark.   2. The recording apparatus according to claim 1, wherein the cross-sectional shape of the sheet material feeding means is substantially D-shaped, and the position of the marking for displaying the polishing marks is located on the D-shaped flat portion (D-cut portion). The recording apparatus according to claim 1.

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