JP6330991B2 - Recording medium conveying apparatus, recording medium cassette, recording apparatus - Google Patents

Description

  The present invention relates to a recording medium conveying apparatus that conveys a recording medium, a recording medium cassette that accommodates the recording medium, and a recording apparatus that is detachably equipped with the recording medium conveying apparatus or the recording medium cassette.

  2. Description of the Related Art In a printer as an example of a recording apparatus, a paper feed cassette that can be attached to and detached from the apparatus main body has been widely used, and there is also a paper feed cassette that includes a separation roller for separating paper (patent) Reference 1). The separation roller is in contact with the feeding roller on the apparatus main body when the paper feeding cassette is mounted on the apparatus main body, and separates the paper by nipping the fed paper between the feeding roller and the separation roller. .

JP 2006-315832 A

  In the above configuration, a spring (coil spring) that urges the separation roller toward the feeding roller is provided in the sheet feeding cassette. The spring is provided so as to bias the separation roller support member that supports the separation roller.

  Here, in order to obtain an appropriate biasing force when incorporating the separation roller support member in the assembly process of the apparatus, the positional relationship between the spring and the separation roller support member, more specifically, the free end of the spring is the separation roller support member. It is necessary to properly adjust the position in contact with.

  However, it is difficult to properly align the position where the free end of the spring is in contact with the separation roller support member due to the incorporation of the separation roller support member with respect to the spring in a free state. There is a possibility that the position in contact with the separation roller support member is displaced, and the separation roller cannot be pressed against the feeding roller by an appropriate load.

  Moreover, since the workability | operativity at the time of incorporating a separation roller support member will fall when the free length of a spring is too long, from the viewpoint of the assembly property of a separation roller support member, it is preferable that the free length of a spring is short. However, if the free length of the spring is shortened, it is necessary to increase the spring constant in order to obtain a predetermined urging force. In this case, the variation in the urging force increases due to the variation in the spring length in the assembled state. There is also a possibility that an appropriate biasing force cannot be obtained.

The above technical problem has been described by taking the separation roller provided in the paper feed cassette as an example, but generally occurs in a configuration in which a sheet is nipped by two rollers.
Accordingly, the present invention has been made in view of such a situation, and an object thereof is to obtain a roller mechanism that has good assemblability and can ensure a degree of freedom in selecting an urging means.

  In order to solve the above problems, a recording medium transporting apparatus according to a first aspect of the present invention includes a driving roller that transports a recording medium, and the driving roller that is biased with the driving roller. A driven roller that nips and conveys the recording medium; a roller holding member that holds the driven roller; and a holder that includes an urging unit that urges the roller holding member in a predetermined direction. The holder includes an opening into which a part of the roller holding member enters, and a part of the roller holding member enters the inside of the holder through the opening and receives a biasing force from the biasing means. .

  According to this aspect, the biasing means for biasing the roller holding member that holds the driven roller is provided in the holder, and a part of the roller holding member enters through the opening provided in the holder, and the biasing means Therefore, when the roller holding member is assembled, the urging means can be already contracted to a predetermined length in the holder. Thereby, workability at the time of assembling the roller holding member is improved, and the degree of freedom in selecting the biasing means can be ensured. Further, the position where the urging means urges the roller holding member can be accurately positioned.

  According to a second aspect of the present invention, in the first aspect, the urging means is a coil spring, and the coil spring is a part of the roller holding member via a plate material arranged inside the holder. It is characterized by energizing.

  According to this aspect, the urging means is a coil spring, and the coil spring urges a part of the roller holding member via the plate material arranged inside the holder. In this case, the free end of the coil spring is not easily violated, and an appropriate biasing force can be obtained.

The third aspect of the present invention is characterized in that the roller holding member is provided so as to be swingable.
For example, when the roller holding member is provided so as to be slid, the sliding load is likely to fluctuate, and the urging force that urges the separation roller may change, making it difficult to perform appropriate separation. . However, according to this aspect, since the roller holding member is provided so as to be able to swing, the urging force for urging the separation roller can be maintained in an appropriate state.

  According to a fourth aspect of the present invention, in the third aspect, the roller holding member includes a shaft fitting portion that fits with a shaft body that forms the swing shaft of the roller holding member, The outer periphery has a substantially oval shape with an arcuate sliding contact portion that comes into sliding contact with the shaft fitting portion as the roller holding member swings, and a non-sliding contact portion that does not slide into contact with the shaft fitting portion. The shaft fitting portion is formed with a guide opening for guiding the swing shaft into the shaft fitting portion, and the guide opening in the attached state of the roller holding member to the main body is formed. Is opposed to the non-sliding contact portion.

  The roller holding member includes a shaft fitting portion that fits with a shaft body that forms a swing shaft of the roller holding member, and can swing when the shaft fitting portion is fitted to the swing shaft. Supported. Here, the swing shaft includes an arc-shaped slide contact portion that comes into sliding contact with the shaft fitting portion as the roller holding member swings, and a non-sliding contact portion that does not slide into contact with the shaft fit portion. Since the guide fitting opening for guiding the swing shaft into the shaft fitting portion is formed in the shaft fitting portion, when the roller holding member is attached, the rocking member is formed. Using the narrow portion of the dynamic shaft, the swing shaft can be inserted into the shaft fitting portion with ease of workability.

  On the other hand, in the mounted state of the roller holding member, the guide opening is opposed to the non-sliding contact portion, that is, the wide portion of the swing shaft is opposed to the guide opening. It can be prevented from falling off the swing shaft.

A recording apparatus according to a fifth aspect of the present invention includes: a recording unit that performs recording on a recording medium; and the recording medium conveyance apparatus according to any one of the first to fourth aspects. And
According to this aspect, in the recording apparatus, it is possible to obtain the same operational effects as any of the first to fourth aspects.

  A recording medium cassette according to a sixth aspect of the present invention is a recording medium provided with a main body forming an accommodation area for accommodating a recording medium, and downstream of the accommodation area in the feeding direction of the recording medium. A separation roller that separates the roller, a roller holding member that holds the separation roller, and a holder that is internally provided with a biasing unit that biases the roller holding member in a predetermined direction. The holder includes an opening into which a part of the roller holding member enters, and a part of the roller holding member enters the inside of the holder through the opening and receives a biasing force from the biasing means. And

  According to this aspect, the biasing means for biasing the roller holding member that holds the separation roller is provided in the holder, and a part of the roller holding member enters through the opening provided in the holder, and the biasing means Therefore, when the roller holding member is assembled, the urging means can be already contracted to a predetermined length in the holder. Thereby, workability at the time of assembling the roller holding member is improved, and the degree of freedom in selecting the biasing means can be ensured. Further, the position where the urging means urges the roller holding member can be accurately positioned.

  According to a seventh aspect of the present invention, in the sixth aspect, the biasing means is a coil spring, and the coil spring is a part of the roller holding member via a plate material arranged inside the holder. It is characterized by energizing.

  According to this aspect, the urging means is a coil spring, and the coil spring urges a part of the roller holding member via the plate material arranged inside the holder. In this case, the free end of the coil spring is not easily violated, and an appropriate biasing force can be obtained.

According to an eighth aspect of the present invention, in the sixth or seventh aspect, the roller holding member is provided so as to be swingable with respect to the main body.
For example, when the roller holding member is provided so as to be slid, the sliding load is likely to fluctuate, and the urging force that urges the separation roller may change, making it difficult to perform appropriate separation. . However, according to this aspect, since the roller holding member is provided so as to be swingable with respect to the main body, the urging force for urging the separation roller can be maintained in an appropriate state.

  According to a ninth aspect of the present invention, in the eighth aspect, the roller holding member includes a shaft fitting portion that fits a swing shaft provided in the main body, and the outer periphery of the swing shaft is The roller holding member is formed in a substantially oval shape with an arcuate sliding contact portion that is in sliding contact with the shaft fitting portion and a non-sliding contact portion that is not in sliding contact with the shaft fitting portion. The shaft fitting portion is formed with a guide opening for guiding the swing shaft into the shaft fitting portion. When the roller holding member is attached to the main body, the guide opening is not It faces the sliding contact part.

  The roller holding member includes a shaft fitting portion that fits with a swing shaft provided in the main body, and can swing by fitting the shaft fitting portion with the swing shaft (by the main body). ) Supported. Here, the swing shaft includes an arc-shaped slide contact portion that comes into sliding contact with the shaft fitting portion as the roller holding member swings, and a non-sliding contact portion that does not slide into contact with the shaft fit portion. Since the guide fitting opening for guiding the swing shaft into the shaft fitting portion is formed in the shaft fitting portion, when the roller holding member is attached, the rocking member is formed. Using the narrow portion of the dynamic shaft, the swing shaft can be inserted into the shaft fitting portion with ease of workability.

  On the other hand, in the mounted state of the roller holding member, the guide opening is opposed to the non-sliding contact portion, that is, the wide portion of the swing shaft is opposed to the guide opening. It can be prevented from falling off the swing shaft.

According to a tenth aspect of the present invention, there is provided a recording apparatus comprising: recording means for recording on a recording medium; and the recording medium cassette according to any one of the sixth to ninth aspects. To do.
According to this aspect, in the recording apparatus, it is possible to obtain the same function and effect as any of the sixth to ninth aspects.

FIG. 3 is a side sectional view showing a paper conveyance path of the printer according to the invention. FIG. 3 is a side sectional view showing a paper conveyance path of the printer according to the invention. The perspective view of the paper cassette which concerns on this invention in the paper feed direction downstream. FIG. 3 is an enlarged perspective view of the paper cassette according to the present invention on the downstream side in the paper feeding direction. FIG. 4 is a side cross-sectional view of the paper cassette according to the present invention on the downstream side in the paper feed direction (cross section BB in FIG. 3). FIG. 4 is a side cross-sectional view of the paper cassette according to the present invention on the downstream side in the paper feed direction (C-C cross section in FIG. 3). FIG. 4 is a side sectional view of the paper cassette according to the present invention on the downstream side in the paper feeding direction (cross section taken along the line DD in FIG. 3). The perspective view of a roller unit. The perspective view of a roller unit attachment state. Sectional drawing of a roller unit attachment state (AA cross section of FIG. 6). (A) is a perspective view of a spring holder (with a coil spring), (B) is a perspective view of a spring holder (without a coil spring). The perspective view of the spring holder attachment site | part (without a spring holder) of a paper cassette main body. The perspective view of a spring holder attachment site | part for showing a spring holder attachment process. The perspective view of a spring holder attachment site | part for showing a spring holder attachment process. The perspective view of the spring holder attachment part (with a spring holder) of a paper cassette main body. The perspective view of the roller unit attachment site | part for showing a roller unit attachment process. The perspective view of the roller unit attachment site | part for showing a roller unit attachment process.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings. However, the invention is not limited to the embodiment described below, and various modifications are possible within the scope of the invention described in the claims. Assuming that these are also included in the scope of the present invention, one embodiment of the present invention will be described below.

  1 and 2 are side sectional views of an ink jet printer (hereinafter referred to as “printer”) 1 which is an embodiment of a “recording apparatus” according to the present invention, and FIG. 3 is a paper cassette 4 according to an embodiment of the present invention. FIG. 4 is a perspective view of the downstream side of the paper feed direction, and FIG. 4 is an enlarged perspective view of the paper cassette 4 on the downstream side of the paper feed direction.

  5 to 7 are side sectional views of the sheet cassette 4 on the downstream side in the sheet feeding direction. FIG. 5 is a sectional view taken along the line BB in FIG. 3, FIG. 6 is a sectional view taken along the line CC in FIG. It corresponds to the DD cross section of FIG. 8 is a perspective view of the roller unit 12, FIG. 9 is a perspective view of the roller unit 12 in an attached state, and FIG. 10 is a sectional view of the roller unit 12 in an attached state (AA sectional view in FIG. 6).

  11A is a perspective view of the spring holder 13 (with the coil spring 14), FIG. 11B is a perspective view of the spring holder 13 (without the coil spring 14), and FIG. FIG. 13 is a perspective view of the spring holder 13 mounting portion, and FIG. 14 is a perspective view of the spring holder 13 mounting step. FIG. 15 is a perspective view of the spring holder 13 mounting portion (with the spring holder 13) of the sheet cassette 4 main body, and FIGS. 16 and 17 are diagrams showing the roller unit 12 mounting step. It is a perspective view of a roller unit 12 attachment site.

  Note that, in the xyz orthogonal coordinate system shown in each drawing, the x direction and the y direction are horizontal directions, of which the x direction is the paper width direction and also the left-right direction of the apparatus. In addition, the y direction is the paper transport direction and is also the apparatus depth direction. Furthermore, the z direction is the direction of gravity and is also the device height direction. Further, the xyz coordinate system in FIG. 3 and subsequent figures showing the sheet cassette 4 alone corresponds to each direction when the sheet cassette 4 is mounted on the printer 1.

  Hereinafter, the overall configuration of the printer 1 will be outlined with reference mainly to FIGS. 1 and 2. The printer 1 is configured such that a paper cassette 4 that accommodates a plurality of recording papers P is detachable (slidable) with respect to an apparatus main body 2 that performs ink jet recording on a recording paper P as an example of a recording medium. The recording paper P is fed one by one from the paper cassette 4.

  The apparatus main body 2 is provided with a first feed roller 23 and a second feed roller 24 as an example of a “drive roller” that is rotationally driven by a power source (motor) (not shown). In the state in which 4 is mounted, the first feeding roller 23 and the second feeding roller 24 are positioned above the front end (left side in FIGS. 1 and 2) of the paper cassette 4. . The second feeding roller 24 and the separation roller 18 as an example of a “driven roller” to be described later constitute a recording medium transport device 25 (FIGS. 5 and 6) according to the present invention.

At the bottom of the paper cassette 4, there is provided a hopper 8 that pushes up the stored recording paper P by swinging about the swing shaft 8a (see also FIG. 3). By pushing up, the uppermost one of the stored recording sheets P can come into contact with the first feeding roller 23 as shown in FIG. Accordingly, the recording paper P is sent out from the paper cassette 4 when the first feeding roller 23 rotates (forward rotation) in this state.
In FIG. 2, the broken line indicates the trajectory of the recording paper P sent out from the paper cassette 4.

  In the paper storage area of the paper cassette 4, edge guides 5a and 5b for guiding the side edges of the recording paper P stored as shown in FIG. 3 are provided so as to be slidable in the paper width direction. An edge guide 6 that guides the rear end of the paper P is provided so as to be slidable in the paper feeding direction.

  On the apparatus main body side, as shown in FIG. 4, a detection lever 16 is provided that constitutes a detection means for detecting the presence or absence of the recording paper P in the paper cassette 4. The detection lever 16 is provided not on the paper cassette 4 but on the apparatus main body side. FIG. 4 illustrates the detection lever 16, the first feeding roller 23, and the second feeding roller 24 provided on the apparatus main body side. For convenience, it is drawn together with the paper cassette 4.

  The paper cassette 4 is provided with a recess 4c along the attachment / detachment direction (y direction) of the paper cassette 4, and the detection lever 16 passes through the recess 4c when the paper cassette 4 is attached / detached. That is, the detection lever 16 is configured not to interfere with the paper cassette 4 by the recess 4c.

  1 and 2, a separation roller 18 is provided at the end of the paper cassette 4 in the paper feeding direction (downstream side). When the paper cassette 4 is mounted, the separation roller 18 is Contact the feeding roller 24. As a result, the recording paper P delivered by the first feeding roller 23 is nipped between the separation roller 18 and the second feeding roller 24.

  Here, the separation roller 18 is provided in a state where a predetermined rotational resistance is applied by the torque limiter 20 (see FIG. 8 and the like). The uppermost one of the recording sheets P sent out by the first feeding roller 23 is in contact with the second feeding roller 24 that is rotationally driven, so that it receives a conveying force from the second feeding roller 24 and receives the downstream side. You can go on. However, since the next and subsequent recording sheets P that are to be double fed along with the uppermost recording sheet P to be fed do not receive the conveying force from the second feeding roller 24, Stagnation in position prevents double feed.

  The separation roller 18 is provided in the roller holder 11 together with the torque limiter 20, and the roller holder 11 moves the separation roller 18 forward and backward with respect to the second feeding roller 24 by swinging. And it is urged | biased by the coil spring 14 (FIG. 6 etc.) which is an example of an urging | biasing means in the predetermined direction, ie, the 2nd feeding roller 24. As shown in FIG. Accordingly, the separation roller 18 nips the recording paper P with the second feeding roller 24 by a predetermined pressing force. The roller holder 11 and the coil spring 14 will be described in detail later.

  As shown in FIG. 3, in the cassette body 4a, preliminary separation slopes 4b are formed on both sides in the paper width direction with respect to the separation roller 18, and the leading edge of the recording paper P fed from the paper cassette 4 becomes the preliminary separation slope 4b. By proceeding downstream while sliding, preliminary separation before reaching the separation roller 18 is performed.

  The rotation direction (forward rotation direction) of the first feeding roller 23 and the second feeding roller 24 when the recording paper P is fed from the paper cassette 4 is the clockwise direction in FIGS. 1 and 2. The reverse direction is the counterclockwise direction of FIGS. 1 and 2.

  Next, on the downstream side of the second feeding roller 24, a first intermediate roller 26 and a second intermediate roller 27 are provided as conveyance rollers for conveying the recording paper P. The first intermediate roller 26 and the second intermediate roller 27 have substantially the same diameter, and both are driven to rotate clockwise in FIGS. 1 and 2 by receiving the power of the motor 20 (FIG. 3). The recording paper P sent out from the paper cassette 4 receives a conveying force from the first intermediate roller 26 and the second intermediate roller 27 and is conveyed downstream.

  Reference numerals 29a and 29b are driven rollers that are driven to rotate while the recording paper P is nipped with the first intermediate roller 26, and reference numerals 29c and 29d are recording paper P with the second intermediate roller 27. This is a driven roller that rotates by being nipped.

  Subsequently, a conveyance roller pair 31 that is rotationally driven is provided on the downstream side of the second intermediate roller 27, and the recording paper P is sent to the recording area by the conveyance roller pair 31. A recording head 35 that ejects ink onto the recording paper P and a support member 33 that supports the recording paper P are provided on the downstream side of the conveyance roller pair 31. The recording head 35 is provided on a carriage 34 that is driven in the paper width direction (main scanning direction).

  A first discharge roller pair 37 and a second discharge roller pair 38 are provided downstream of an area (recording area) where the support member 33 and the recording head 35 face each other. The paper is discharged by these discharge roller pairs.

Subsequently, an attachment structure of the roller unit 12 that supports the separation roller 18 and an urging structure of the roller holder 11 will be described with reference to FIG.
As shown in FIG. 8, the roller unit 12 includes the separation roller 18 described above, a roller holder 11 as a roller holding member that holds the separation roller 18, a torque limiter 20 that gives the separation roller 18 a predetermined rotational resistance, It is configured with.
In this embodiment, the cassette body 4a, the roller holder 11, and the holder 13 are formed of a resin material.

  In the present embodiment, two separation rollers 18 are provided at a predetermined interval in the x direction, and the rotation shaft 19 is supported by the roller holder 11. The shaft end of the rotating shaft 19 has a D shape, and the rotating shaft 19 does not rotate relative to the roller holder 11 and the separation roller 18 rotates with respect to the rotating shaft 19. ing.

  The roller holder 11 has two shaft fitting portions 11a and 11a, and a swing shaft 4d as a “shaft body” formed on the cassette body 4a of the paper cassette 4 is fitted to the shaft fitting portion 11a. Thus, the roller holder 11 is attached to the main body 4a.

  The roller holder 11 has two arm portions 11d, and a hook portion 11e is formed at the tip of the arm portion 11d. The hook portion 11e defines the swing limit of the roller unit 12 (roller holder 11) when the roller unit 12 is attached to the cassette body 4a.

  Specifically, a hooked portion 4e is formed below the attachment area of the roller unit 12 (roller holder 11) in the cassette body 4a, and the roller unit 12 (roller holder 11) moves the separation roller 18 to the second position. (2) The swing limit of the roller unit 12 (roller holder 11) in the swing direction (counterclockwise direction in FIG. 7) to be brought into pressure contact with the feeding roller 24 is defined. The hooked portion 4e functions when the paper cassette 4 is pulled out from the apparatus main body 2.

  Further, as shown in FIG. 7, a stopper 4 f is formed below the attachment area of the roller unit 12 (roller holder 11) in the cassette body 4 a, and the roller unit 12 (roller holder 11) moves the separation roller 18 to the first position. (2) The swing limit of the roller unit 12 (roller holder 11) in the swing direction (clockwise direction in FIG. 7) separated from the feeding roller 24 is defined. An imaginary line and a symbol d 'indicate a state when the hook portion 11e contacts the stopper 4f.

  Subsequently, a spring holder 13 is provided below the attachment region of the roller unit 12 (roller holder 11) as shown in FIGS. 5, 6, 9, 10, 17, and the like. The spring holder 13 holds the coil spring 14 therein and has an opening 13a.

  On the other hand, the roller holder 11 is provided with a rib 11b that protrudes downward. In a state where the spring holder 13 is attached to the cassette body 4a, the rib 11b that is a part of the roller holder 11 passes through the opening 13a. It enters the inside of the spring holder 13. Since the coil spring 14 is provided inside the holder 13, the roller holder 11 receives a biasing force from the coil spring 14 when the rib 11 b enters the holder 13 through the opening 13 a.

  Here, a plate 15 is provided between the upper end of the coil spring 14 and the holder 13. That is, the coil spring 14 biases the roller holder 11 through the plate 15. Thereby, the upper end part (free end) of the coil spring 14 becomes difficult to be violated in the holder 13, and an appropriate urging force can be obtained.

  Note that two rib-shaped paper guide portions 11 c are formed on the roller holder 11. When the roller unit 12 (roller holder 11) is attached to the cassette body 4a, the paper guide portion 11c is configured so that the paper guide portion 11c protrudes a predetermined amount above the preliminary separation slope 4b as shown in FIGS. It has become. As a result, the leading edge of the sheet is guided between the separation roller 18 and the second feeding roller 24, and the leading edge of the sheet does not contact the outer peripheral surface of the separation roller 18 at a steep angle. It is possible to prevent damage (turning or the like) from being applied to the front end of the sheet due to contact with the surface at a steep angle.

  Next, a structure for attaching the holder 13 to the cassette body 4a will be described. First, as shown in FIGS. 11 (A) and 11 (B), the holder 13 has a protrusion 13b protruding to the side at a lower portion of a cylindrical portion 13e for accommodating the coil spring 14, and the protrusion 13b is formed. A constrained portion 13c and a hole 13d are formed on the opposite side to the opposite side.

  On the other hand, the cassette body 4a is formed with holes 4h and restraining portions 4g as shown in FIG. The hole 4h is a hole into which the protrusion 13b formed in the holder 13 enters, and the restraining portion 4g is a tongue that is positioned above the restrained portion 13c formed in the holder 13 when the holder 13 is attached. It is a piece-like protrusion. The cassette body 4a is formed with a screw hole 4j.

  In the above configuration, when the holder 13 is attached to the cassette body 4a, after the coil spring 14 and the plate 15 are accommodated in the holder 13, the holder 13 is disposed from above as shown in FIG. Thereafter, as shown in the change from FIG. 13 to FIG. 14, the holder 13 is slid rightward in the figure. As a result, the protrusion 13b enters the hole 4h, and the restraining portion 4g is positioned above the restrained portion 13c. As a result, the holder 13 is restrained in the z direction and the y direction with respect to the cassette body 4.

As shown in FIG. 14, the positions of the holes 13d formed in the holder 13 and the screw holes 4j formed in the cassette body 4a coincide with each other, and are fixed by screws 21 (the screws 21 are shown in FIG. 15). ). Accordingly, the holder 13 is also restricted from being displaced in the x direction, and is securely fixed to the cassette body 4a.
In this state, the coil spring 14 is accommodated in the holder 13, and the spring length is shortened to some extent between the holder 13 and the cassette body 4a.

  Next, a process of attaching the roller unit 12 (roller holder 11) to the cassette body 4a will be described. As shown in FIG. 7, the outer periphery of the swing shaft 4d formed on the cassette body 4a is an arcuate slide contact portion s that comes into sliding contact with the shaft fitting portion 11a as the roller unit 12 (roller holder 11) swings. The shaft fitting portion 11a and the non-sliding contact portion t that does not slide contact are formed in a substantially oval shape. And the longitudinal direction is formed as a state along the z direction.

  On the other hand, the shaft fitting portion 11a is formed with a guide opening 11f that guides the swing shaft 4d into the shaft fitting portion. Accordingly, when the roller unit 12 (roller holder 11) is attached to the cassette body 4a, as shown by the phantom line in FIG. 7, the guide opening 11f is directed downward and the shaft fitting portion 11a is moved downward from above the swing shaft 4d. Move to. That is, the swing shaft 4d is inserted into the shaft fitting portion 11a using the narrow portion of the swing shaft 4d.

  FIG. 16 shows a state in which the swing shaft 4d is inserted into the shaft fitting portion 11a. From this state, the roller unit 12 (roller holder 11) is swung around the swing shaft 4d until the hook portion 11e formed on the roller holder 11 is hooked on the hooked portion 4e. When the hook portion 11e is engaged with the locked portion 4e (enters the lower side), a click sound (engagement sound) is generated and a click feeling is generated. Thus, the roller unit 12 (roller holder 11) is in the attached state shown in FIG.

  At this time, the rib 11 b formed on the lower side of the roller holder 11 also enters the opening 13 a of the holder 13 and the rib 11 b receives a biasing force from the coil spring 14 via the plate 15.

  When the roller unit 12 (roller holder 11) is attached, the guide opening 11f of the shaft fitting portion 11a faces the non-sliding contact portion t of the swing shaft 4d as shown in FIG. 7, that is, the swing shaft 4d. Since the wide part of this is opposed to the guide opening 11f, the shaft fitting portion 11a can be prevented from falling off the swinging shaft 4d.

  As described above, the paper cassette 4 according to the present invention includes the cassette body 4a that forms a storage area for storing the recording paper P, and the separation of the recording paper P that is provided downstream of the storage area in the paper feed direction. And a roller holder 11 as a roller holding member that holds the separation roller 18. A holder 13 that is fixed to the cassette body 4a and includes a coil spring 14 as an urging means for urging the roller holder 11 in a predetermined direction (direction toward the second feeding roller 24). ing. The holder 13 includes an opening 13 a into which the rib 11 b that is a part of the roller holder 11 enters. The rib 11 b enters the inside of the holder 13 through the opening 13 a and receives a biasing force from the coil spring 14.

  Accordingly, when the roller unit 12 (roller holder 11) is incorporated into the cassette body 4a, the coil spring 14 can be already contracted in the holder 13 to a predetermined length. Thereby, workability at the time of assembling the roller holder 11 is improved, and the position where the coil spring 14 biases the roller holder 11 can be accurately positioned. In addition, it is possible to ensure the degree of freedom (free length, spring constant, etc.) of selection of the coil spring 14.

  Further, since the roller unit 12 (roller holder 11) is provided so as to be swingable with respect to the cassette body 4a, the roller unit 12 (roller holder 11) is not easily subjected to a sliding load when its posture is changed, and a separation roller 18 is attached. The energizing force to be applied can be maintained in an appropriate state.

  As mentioned above, it cannot be overemphasized that it is changeable suitably about each component demonstrated, without being limited to the content disclosed. In particular, in the above-described embodiment, the second feeding roller 24 is exemplified as an example of the “driving roller”, and the separation roller 18 is exemplified as an example of the “driven roller”. It may be a driving roller provided in the conveyance path, and the “driven roller” may be a driven roller provided in another paper conveyance path. For example, in the configuration shown in FIG. 1, the “driving roller” and the “driven roller” may be the transport roller pair 31, or the discharge roller pair 37 or 38.

DESCRIPTION OF SYMBOLS 1 Inkjet printer, 2 apparatus main body, 4 paper cassette, 4a cassette main body, 4b preliminary separation slope, 4c recessed part, 4d rocking shaft, 4e hooking part, 4f stopper, 4g restraint part, 4h hole, 4j screw hole, 5a 5b Edge guide, 6 Edge guide, 8 Hopper, 8a Oscillating shaft, 11 Roller holder, 11a Shaft fitting part, 11b Rib, 11c Paper guide part, 11d Arm, 11e Hook part, 11f Guide opening, 12 Roller unit, 13 Holder, 13a Opening, 13b Protrusion, 13c Restrained part, 13d Hole, 13e Cylindrical part, 14 Coil spring, 15 Plate, 16 Detection lever, 18 Separating roller, 19 Rotating shaft, 20 Torque limiter, 21 Screw, 23 1st Feeding roller, 24 Second feeding roller, 26th Intermediate roller, 27 a second intermediate roller, 29 a - 29 d driven roller, 31 transport roller pair, 33 support member, 34 a carriage 35 the recording head 37 first discharge roller pair, 38 second discharge roller pair, P recording paper,

Claims (10)

A driving roller for conveying the recording medium;
A driven roller that is urged against the driving roller to nip and convey the recording medium together with the driving roller;
A roller holding member for holding the driven roller;
A holder for holding and holding a biasing means for biasing the roller holding member in a predetermined direction,
The roller holding member is swingably provided,
The holder includes an opening into which a part of the roller holding member enters,
A part of the roller holding member enters the inside of the holder through the opening, a part of the roller holding member receives a biasing force from the biasing means,
A recording medium conveying apparatus characterized by the above. The recording medium carrying device according to claim 1,
The biasing means is a coil spring;
The coil spring urges a part of the roller holding member through a plate material arranged inside the holder;
A recording medium conveying apparatus characterized by the above. In the recording medium conveyance device according to claim 1 or 2 ,
The roller holding member includes a shaft fitting portion that fits with a swing shaft that can swing the roller holding member,
The outer periphery of the swing shaft includes an arc-shaped slide contact portion that comes into sliding contact with the shaft fitting portion as the roller holding member swings, and a non-sliding contact portion that does not slide into contact with the shaft fit portion,
The shaft fitting portion is formed with a guide opening for guiding the swing shaft into the shaft fitting portion,
In the attached state of the roller holding member to the swing shaft, the guide opening faces the non-sliding contact portion.
A recording medium conveying apparatus characterized by the above. In the recording medium conveyance device according to any one of claims 1 to 3 ,
The roller holding member includes a hook portion that regulates swinging of the roller holding member,
In a state where the recording medium conveying device is pulled out, the hook portion comes into contact with a hooked portion that regulates swinging of the roller holding member, and the roller against the biasing force from the biasing unit Restricting swinging of the holding member,
A recording medium conveying apparatus characterized by the above. Recording means for recording on a recording medium;
The recording medium conveyance device according to any one of claims 1 to 4 , and
Recording device. A main body forming an accommodation area for accommodating a recording medium;
A separation roller for separating the recording medium provided on the downstream side in the feeding direction of the recording medium with respect to the storage area;
A roller holding member for holding the separation roller;
A holder fixed to the main body, and provided with an urging means for urging the roller holding member in a predetermined direction;
The roller holding member is provided to be swingable with respect to the main body,
The holder includes an opening into which a part of the roller holding member enters,
A part of the roller holding member enters the inside of the holder through the opening, a part of the roller holding member receives a biasing force from the biasing means,
A recording medium cassette characterized by the above. The recording medium cassette according to claim 6 , wherein the biasing means is a coil spring,
The coil spring urges a part of the roller holding member through a plate material arranged inside the holder;
A recording medium cassette characterized by the above. The recording medium cassette according to claim 6 or 7 , wherein the roller holding member includes a shaft fitting portion that fits a swing shaft provided in the main body.
The outer periphery of the swing shaft includes an arc-shaped slide contact portion that comes into sliding contact with the shaft fitting portion as the roller holding member swings, and a non-sliding contact portion that does not slide into contact with the shaft fit portion,
The shaft fitting portion is formed with a guide opening for guiding the swing shaft into the shaft fitting portion,
In the attachment state of the roller holding member to the main body, the guide opening faces the non-sliding contact portion.
A recording medium cassette characterized by the above. The recording medium cassette according to any one of claims 6 to 8 ,
The roller holding member includes a hook portion that regulates swinging of the roller holding member,
In a state where the recording medium cassette is pulled out from a recording apparatus for recording on the recording medium, to which the recording medium cassette is mounted, the hook portion comes into contact with a hooked portion provided in the main body. Restricting the swinging of the roller holding member against the biasing force from the biasing means,
A recording medium cassette characterized by the above. Recording means for recording on a recording medium;
The recording medium cassette according to any one of claims 6 to 9 ,
Recording device.

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