JP2010159162A - Paper feeding cassette - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper feeding cassette capable of securing sufficient rigidity capable of storing a plurality of paper of a larger size, even if a paper placing surface is largely expanded still in a structure capable of storing the plurality of paper of a high use frequency, without causing a size increase and a weight increase. <P>SOLUTION: This paper feeding cassette 78 can be inserted into and extracted from a printer part 11. The paper feeding cassette 78 has a main tray 20, a second tray 21 and a cover 79, and the main tray 20 can slide a slide tray 83 to a tray body 82. The cover 79 moves in response to a slide of the slide tray 83. In a state of extracting the second tray 21 from the inside of the cover 79, a first projection 68 of the cover 79 engages with a second projection 69 of the second tray 21. In a state where the slide tray 83 and the cover 79 are in an extension position, the movement in the extracting direction of the second tray 21 is regulated, and the second tray 21 cannot move to a paper feeding position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a paper feed cassette including a first tray and a second tray configured to be capable of storing paper, and in particular, the first tray has a slide tray that can slide with respect to the tray body, and the slide tray. The present invention relates to a paper feed cassette in which a cover member is provided on the top of the paper feed cassette.

  A conventional image recording apparatus is detachably provided with a paper feed cassette that can store sheet-like paper. When paper is used and the paper cassette becomes empty, the user pulls out the paper cassette from the image recording device to refill the paper cassette, refills the paper, and then records the paper cassette again. Attach to the device.

  As this type of paper feed cassette, as disclosed in Patent Document 1, a device in which a first paper feed cassette is provided in the lower part of the apparatus main body and a second paper feed cassette is provided in the upper part thereof is known. In the paper feed cassette disclosed in Patent Document 1, the second paper feed cassette is slidably supported by the first paper feed cassette, and a paper feed position and a paper feed position for the paper stored in the second paper feed cassette. Slide between positions that cannot be fed.

  Further, as disclosed in Patent Document 2, a slide-type paper feed cassette also serving as a paper discharge tray having a slide portion that is slidably supported with respect to the cassette body is known. In the paper feed cassette of Patent Document 2, the paper placement area is changed by sliding the slide portion with respect to the cassette body in accordance with the size of the cut paper to be accommodated. A cover that also serves as a paper discharge tray is attached to the slide portion. The cover moves in the same direction as the slide part slides. This paper feed cassette is A4 size paper (hereinafter referred to as “A4 paper”), letter size paper (hereinafter referred to as “LT paper”) frequently used in Europe and the United States, and legal size paper (hereinafter referred to as “LT paper”). (Hereinafter referred to as “legal paper”). Therefore, the slide range of the slide portion of the paper feed cassette is mainly in a range from a position where LT paper can be stored to a position where A4 paper can be stored or a position where legal paper can be stored.

JP 2007-145524 A JP-A-6-144598

  In recent years, in home use and SOHO, there has been an increasing demand for image recording apparatuses capable of recording images on A3 size recording paper (hereinafter referred to as “A3 paper”), and the size and cost of the apparatus are reduced. Is strongly requested. However, when the paper feed cassette is configured so that the paper placement surface can be enlarged to A3 size with the same configuration as each paper feed cassette described in Patent Documents 1 and 2 above, Since the weight increases, the rigidity of the paper feed cassette is insufficient. In particular, when the slide portion is configured to be slidable with respect to the cassette body as in the paper feed cassette described in Patent Document 2, when the slide portion is extended to the maximum extent, The rigidity of the connecting part of is extremely insufficient. In this case, if the paper cassette is lifted by the user for attachment and detachment with the A3 paper accommodated, the weight of the paper is added in addition to the weight of the paper cassette itself, and the paper cassette may be deformed. is there. The deformation of the paper feed cassette causes deterioration of workability when the paper feed cassette is mounted on the image recording apparatus. In addition, although the method of ensuring rigidity can be considered by adding a reinforcing rib or increasing the thickness, in each case not only the weight increases, but also the paper feeding cassette becomes larger, and the weight is reduced. A small paper cassette cannot be realized.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to accommodate a plurality of sheets that have been frequently used in the past without increasing the size and weight of the height and width. An object of the present invention is to provide a paper feed cassette capable of ensuring sufficient rigidity that can accommodate a plurality of paper sheets even if the paper placement surface is greatly enlarged while maintaining the specifications.

(1) In order to achieve the above object, the present invention is configured as a paper feed cassette including a first tray, a cover member, a second tray, a regulating member, and a first lock mechanism. The first tray includes a tray body and a slide tray. The slide tray is configured to be slidable with respect to the tray main body, and is configured between the first position where a paper placement surface of a predetermined size is formed and the second position where the predetermined paper placement surface is extended. It is slidable with respect to the tray body. A cover member is provided in the upper part of the said slide tray, and covers the upper surface of the said slide tray. The second tray is slidable in the same direction as the sliding direction of the slide tray between a third position where the stored paper can be fed and a fourth position where the stored paper cannot be fed. It is provided above. The restricting member restricts the slide of the second tray from the fourth position to the third position in a state where the slide tray is disposed at the second position. The first locking mechanism fixes the second tray to the tray body in a state where the second tray is disposed at the fourth position.

  Since it is configured in this manner, a sheet having a size that has been frequently used (for example, A4 sheet) can be accommodated in the first tray while the slide tray is in the first position. When the slide tray is slid from the first position to the second position, the sheet placement surface is expanded, and a larger size sheet (for example, A3 sheet) can be accommodated in the first tray. The cover member is provided in the upper part of the slide tray in a state of covering the upper surface of the slide tray. The cover member moves in the same direction as the slide direction of the slide tray as the slide tray slides. The second tray is slidable in the same direction as the slide direction of the slide tray above the tray body. When the second tray is disposed at the third position, the paper stored in the second tray can be fed. When the second tray is disposed at the fourth position, the second tray is closest to the cover member. The second tray is fixed to the tray body by the first locking mechanism at the fourth position closest to the cover member.

  The sheet feeding cassette can be attached to the image recording apparatus in a state where A3 sheets are stored in the first tray and sheets of a predetermined size are stored in the second tray. In a state where the slide tray is disposed at the second position, even if the fixation by the first lock mechanism is released by the user, the restricting member restricts the second tray from sliding from the fourth position to the third position. . In other words, in a state where the slide tray is disposed at the second position, the second tray cannot be slid from the fourth position to the third position by the restriction member, and is in a state of being fixed to the tray body at the fourth position. Maintained.

  Since such a regulating member is provided in the paper feed cassette, the paper feed cassette is always in the slide tray when the maximum size paper (for example, A3 paper) that can be accommodated is contained in the first tray. The upper part is covered with a cover member. Further, when the sheet is stored in the second tray, even if the user tries to slide the second tray to the third position for the purpose of feeding the sheet from the second tray, the second tray is the cover member. The fixed state with the tray main body is maintained at the fourth position closest to. Accordingly, when the paper cassette in which the A3 paper is replenished to the first tray is mounted on the image recording apparatus, the first side even if the side of the paper cassette is gripped with both hands of the user and the paper cassette is lifted. The tray, the cover member, and the second tray are integrated, and these members cooperate with each other to improve the rigidity of the paper feed cassette.

(2) As a specific example of the restriction member, a member having a first engagement member and a second engagement member can be considered. The first engagement member is provided on the cover member. The second engagement member is provided on the second tray, and the second tray to the third position is achieved by engaging the first engagement member in a state where the slide tray is disposed at the second position. Regulate tray slides.

(3) Further, as another specific example of the restriction member, it may have a third engagement member and a fourth engagement member. The third engagement member is provided on the slide tray. The fourth engagement member is provided on the second tray, and the second tray to the third position is engaged by engaging the third engagement member in a state where the slide tray is disposed at the second position. Regulate tray slides.

(4) The cover member includes an accommodating portion that can accommodate the second tray, and a support mechanism that slidably supports the second tray. In this case, the third position is a position where the second tray is pulled out from the accommodating portion in a state where the slide tray is disposed at the first position. The fourth position is a position where the second tray is accommodated in the accommodating portion in a state where the slide tray is disposed at the first position, and the slide tray is disposed at the second position. In this state, the second tray is pulled out from the accommodating portion.

(5) The paper feed cassette of the present invention may further include a fifth engagement member that engages the slide tray and the cover member in a state where the upper surface of the slide tray is covered with the cover member. .

  Thereby, the attachment mechanism of a slide tray and a cover member is easily implement | achieved.

(6) The paper feed cassette of the present invention may further include a second lock mechanism for fixing the slide tray to the tray body in a state where the slide tray is disposed at the second position. Good.

(7) The second tray is provided at an upper portion of the tray main body, and is supported by a movable member that is slidable in the same direction as the slide tray, and is rotatably supported by the movable member, and can store paper. It is preferable to have a rotating member.

  Accordingly, the upper surface of the slide tray is opened by rotating the rotating member upward, so that it is possible to easily replenish paper into the first tray.

  According to the paper feed cassette of the present invention, the sheet placement surface is greatly increased while maintaining specifications that can accommodate a plurality of sheets that have been frequently used in the past without increasing the size or weight of the height and width. Even if it is enlarged, it is possible to ensure sufficient rigidity to accommodate a plurality of sheets.

FIG. 1 is an external perspective view of a multifunction machine 10 according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing the internal structure of the printer unit 11. FIG. 3 is a plan view schematically showing the paper feed cassette 78, showing a state in which the slide tray 73 is disposed at the standard position and the rotating tray 43 accommodated in the accommodation space 86 is disposed at the retracted position. ing. FIG. 4 is a plan view schematically showing the paper feed cassette 78, showing a state in which the slide tray 73 is arranged at the standard position, and the rotating tray 43 pulled out from the storage space 86 is arranged at the paper feed position. Has been. FIG. 5 is a plan view schematically showing the paper feed cassette 78, showing a state in which the slide tray 73 is arranged at the extended position and the rotating tray 43 pulled out from the storage space 86 is arranged at the retracted position. ing. FIG. 6 is a schematic cross-sectional view schematically showing a cross-sectional structure of the paper feed cassette 78, and the slide plate 42 is slid from the retracted position to the paper feed position with the slide tray 83 placed at the standard position. The operating state is shown. FIG. 7 is a schematic cross-sectional view schematically showing a cross-sectional structure of the paper feed cassette 78. The slide tray 83 is slid from the standard position to the extended position with the slide plate 42 disposed at the retracted position. The state is shown. FIG. 8 is a schematic cross-sectional view schematically showing a cross-sectional structure of the paper feed cassette 78, and shows a state in which the rotation tray 43 is rotated upward with respect to the sliding plate 42. FIG. 9 is a schematic cross-sectional view schematically showing a cross-sectional structure of the paper feed cassette 118. The slide plate 42 is slid from the retracted position to the paper feed position with the slide tray 83 placed at the standard position. The operating state is shown. FIG. 10 is a schematic cross-sectional view schematically showing a cross-sectional structure of the paper feed cassette 118. The slide tray 83 is slid from the standard position to the extended position with the slide plate 42 disposed at the retracted position. The state is shown.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings as appropriate. Note that each embodiment described below is merely an example of the present invention, and it is needless to say that the embodiment of the present invention can be appropriately changed without departing from the gist of the present invention.

<First Embodiment>
The first embodiment of the present invention will be described below with reference to FIGS.

[Outline of MFP 10]
FIG. 1 is an external perspective view of a multifunction machine 10 (an example of an image recording apparatus of the present invention) that is an embodiment of the present invention. In the following description, the vertical direction 7 is defined with reference to the state where the multifunction machine 10 is installed (the state shown in FIG. 1), and the side on which the operation panel 40 is provided is the front side (front side). A front-rear direction 8 is defined, and a left-right direction 9 is defined when the multifunction device 10 is viewed from the front side (front side).

  The multifunction machine 10 is generally formed in a thin rectangular parallelepiped having a large width (width in the left-right direction 9) and depth (length in the front-rear direction 8) with respect to the height (up-down direction 7). The multi-function device 10 mainly includes a multifunction unit integrally including an ink jet recording type printer unit 11 provided in a lower part, a scanner unit 12 provided in an upper part, and an operation panel 40 provided in an upper part of a front surface. Device. The multifunction machine 10 has various functions such as a facsimile function, a printer function, a scanner function, and a copy function. Functions other than the printer function are arbitrary. For example, the image recording apparatus of the present invention may be implemented as a printer having only a printer function that does not have a scan function, a copy function, or a facsimile function.

  The printer unit 11 has an opening 13 formed in the front, and a paper feed cassette 78 (an example of a paper feed cassette according to the present invention) is mounted in the printer unit 11 through the opening 13. The paper feed cassette 78 is configured to be able to be inserted and removed in the front-rear direction 8 from the opening 13 into the printer unit 11. The paper feed cassette 78 can accommodate recording papers of various sizes (an example of the paper of the present invention), the main tray 20 (an example of the first tray of the present invention) is disposed in the lower stage, and the second in the upper stage. A tray 21 (an example of a second tray of the present invention) and a cover 79 (an example of a cover part material of the present invention) are disposed. That is, the main tray 20 and the second tray 21 are provided in two upper and lower stages. In this embodiment, the cover 79 is disposed on the front side of the paper feed cassette 78, and the recording paper on which the image has been recorded is discharged and stacked on the paper discharge holding surface 80 on the upper surface.

[Configuration of Printer Unit 11]
Next, the configuration of the printer unit 11 will be described with reference to FIG. FIG. 2 is a longitudinal sectional view showing the internal structure of the printer unit 11.

  The printer unit 11 ejects ink droplets onto a paper feed cassette 78, a paper feed unit 15 that picks up recording paper from each of the trays 20 and 21 of the paper feed cassette 78, and a recording paper picked up by the paper feed unit 15. And an ink jet recording type recording unit 24 (an example of the recording unit of the present invention) that forms an image on a recording sheet. The recording unit 24 is not limited to the ink jet recording method, and various recording methods such as an electrophotographic method or a thermal recording method can be applied.

[Conveyance path 65]
Inside the printer unit 11, a conveyance path 65 is formed from the front end of the main tray 20 through the recording unit 24 to the paper discharge holding unit 79. The conveyance path 65 has a curved path 65 </ b> A formed between the leading end of the main tray 20 and the recording unit 24.

  As shown in FIG. 2, the curved path 65 </ b> A is a path extending from the vicinity of the upper end of the separation inclined plate 22 provided in the main tray 20 to the recording unit 24, and is formed in a curved shape. The curved path 65 </ b> A is generally formed in an arc shape centering on the inside of the printer unit 11. The curved path 65 </ b> A is partitioned by the outer guide member 18 and the inner guide member 19.

[Recording unit 24]
The recording unit 24 is disposed on the conveyance path 65 above the paper feed cassette 78. The recording unit 24 includes a carriage 38 and a recording head 39 mounted on the carriage 38, and the carriage 38 reciprocates in a direction perpendicular to the paper surface of FIG. 2 (left and right direction 9 of FIG. 1, main scanning direction). In FIG. 2, a minute ink droplet is ejected from the recording head 39 to form an image on a recording sheet on the platen 42.

  A pair of conveying rollers 60 and a pinch roller 61 are provided between the end of the curved path 65 </ b> A, that is, the end of the curved path 65 </ b> A on the downstream side in the conveying direction, and the recording unit 24. These rollers 60 and 61 pinch the recording paper that has been conveyed through the curved path 65 </ b> A and feed the recording paper onto the platen 42.

  A paper discharge roller 62 and a spur roller 63 are provided on the downstream side in the transport direction from the recording unit 24, and these hold the recorded recording paper and transport it to the paper discharge holding surface 80 side.

[Paper Feeder 15]
The paper feed unit 15 picks up the recording paper accommodated in the main tray 20 or the second tray 21 of the paper feed cassette 78 and feeds the recording paper toward the curved path 65A and the paper feed arm 26. And a drive transmission mechanism (not shown) that transmits a driving force from a motor (not shown) to the paper feed roller 25.

  A base shaft 28 is provided between the paper feed cassette 78 and the recording unit 24. When a driving force of a motor (not shown) is transmitted to the base shaft 28, the driving force is transmitted to a gear train that is a driving transmission mechanism mounted on the sheet feeding arm 26 so that the sheet feeding arm 26 rotates downward. It is configured. The paper feed arm 26 can move up and down so as to be able to contact and separate from the upper surface of the paper feed cassette 78 (the upper surface of the main tray 20 or the upper surface of the second tray 21). The paper feed arm 26 is configured to rotate in the vertical direction when the paper feed cassette 78 is inserted and removed.

  The drive transmission mechanism attached to the paper feed arm 26 is composed of a plurality of gears arranged substantially in a straight line. When the second tray 21 is in the paper feeding position when the paper feeding cassette 78 is inserted into the printer unit 11, above the second tray 21, and when the second tray 21 is not in the paper feeding position, The paper feed arm 26 is guided by a paper feed cassette 78 so as to be disposed above the main tray 20. The paper feed roller 25 rotates when a driving force is transmitted from the base shaft 28 in contact with the recording paper accommodated in the main tray 20 or the second tray 21 of the paper feeding cassette 78, and causes the recording paper to bend the curved path 65A. To send.

  The paper feed arm 26 is urged downward by its own weight or urged by a spring or the like. Therefore, the paper feed roller 25 is in contact with the upper surface of the recording paper stored in the paper feed cassette 78 with a predetermined urging force.

  Since the printer unit 11 is configured as described above, the recording sheet fed from the main tray 20 or the second tray 21 by the sheet feeding unit 15 is moved along the curved path 65A by the outer guide member 18 and the inner guide member 19. It is guided to make a U-turn from the bottom to the top and conveyed to the recording unit 24. Then, after the image is recorded on the front surface by the recording unit 24, the image is discharged onto the paper discharge holding surface 80.

[Paper Feed Cassette 78]
Next, the configuration of the paper feed cassette 78 will be described with reference to FIGS. 3 to 5 are plan views schematically showing the paper feed cassette 78. FIG. 6 to 8 are schematic cross-sectional views schematically showing the cross-sectional structure of the paper feed cassette 78. FIG. In the following description, the vertical direction 31 is defined with reference to the state in which the paper feed cassette 78 is maintained horizontally or the paper feed cassette 78 is mounted on the multifunction device 10 installed to be usable. The direction in which the recording paper is fed from the paper cassette 78 is defined as the paper feeding direction 32, and the horizontal direction 33 is defined as viewed from the front side of the multifunction machine 10 with the paper feeding cassette 78 mounted on the multifunction machine 10. . Here, in a state in which the paper feed cassette 78 is mounted on the multifunction device 10, the vertical direction 7 of the multifunction device 10 coincides with the vertical direction 31 of the paper feed cassette 78, and the horizontal direction 9 of the multifunction device 10 is the paper feed cassette. It coincides with 78 in the horizontal direction 33.

  The paper feed cassette 78 includes a main tray 20, a second tray 21, and a cover 79.

[Main tray 20]
The main tray 20 is disposed on the bottom side of the printer unit 11. The main tray 20 is formed in a rectangular box shape with an open upper surface. A plurality of recording sheets can be stored substantially horizontally in a state where a plurality of recording sheets are stacked on the sheet placing surface 113 of the main tray 20. The main tray 20 can accommodate recording paper of A4 size (210 mm × 297 mm) at the maximum.

  The main tray 20 includes a tray main body 82 (an example of the tray main body of the present invention) positioned on the downstream side (upper side in FIG. 3) in the paper feeding direction 32 in a state where the main tray 20 is mounted on the apparatus main body (printer unit 11). And a slide tray 83 (an example of the slide tray of the present invention) provided to be slidable along the paper feeding direction 32 with respect to 82. The tray main body 82 has a paper placement plate 82A (see FIG. 6) that forms the bottom surface thereof. Further, the slide tray 83 has a sheet placement plate 83A (see FIG. 6) that forms the bottom surface thereof. As shown in FIG. 6, the paper placement plate 83 </ b> A of the slide tray 83 is assembled so as to overlap below the paper placement plate 82 </ b> A of the tray body 82. By these paper placement plates 82A and 83A, a paper placement surface 113 in the main tray 20 is formed.

  A pair of well-known side guides 85 are supported on the sheet placing plate 82A of the tray body 82 so as to be slidable in the left-right direction 33 (width direction). A recording sheet is accommodated in a space sandwiched between the side guides 85. When the side guide 85 is slid and comes into contact with the left and right ends of the recording paper accommodated, the recording paper is positioned such that the center position of the recording paper in the left-right direction 33 becomes the reference position.

  The tray body 82 supports the slide tray 83 so as to be slidable in the paper feeding direction 32. As a support mechanism for the slide tray 83, for example, a rail groove (not shown) extending in the paper feeding direction 32 is provided in the central portion of the paper placement plate 82 </ b> A of the tray body 82 in the left-right direction 33. A mechanism is conceivable in which a rail (not shown) extending in the paper feeding direction 32 is provided at the center of the plate 83A, and this rail is slidably supported by the rail groove.

  The slide tray 83 is contracted with respect to the tray body 82 as shown in FIG. 3 (corresponding to the first position of the present invention) and extended with respect to the tray body 82 as shown in FIG. It can slide between positions (corresponding to the second position of the present invention). When the slide tray 83 is slid from the standard position to the extended position with respect to the tray body 82, the sheet placement surface 113 of the main tray 20 is expanded, and when the slide tray 83 is slid from the extended position to the standard position, the main The paper placement surface 113 of the tray 20 is reduced. In the present embodiment, when the slide tray 83 is in the extended position, A3 size recording paper can be accommodated in the main tray 20 such that the longitudinal direction thereof is along the paper feeding direction 32. Further, when the slide tray 83 is at the standard position, recording paper of A4 size or smaller can be accommodated in the main tray 20 such that the longitudinal direction thereof is along the paper feeding direction 32.

  In the paper placement plate 83A of the slide tray 83, a front plate 84 is erected from an upstream end (lower side in FIG. 3) in the paper feeding direction 32. The front plate 84 defines the upstream side of the paper loading surface 113 in the paper feeding direction 32. As shown in FIG. 6, a boss portion 101 protrudes upward from the upper end of the front plate 84. The boss portion 101 is provided at both left and right end portions of the front plate 84. On the upstream side in the paper feeding direction 32 at both right and left ends of a cover 79 described later, an engaging recess 103 is formed to open downward. The boss portion 101 is disposed so as to be fitted into the engaging recess 103 in a male-female manner. The boss 101 and the engagement recess 103 correspond to the fifth engagement member of the present invention.

  The main tray 20 has a second locking mechanism 90 (position of the present invention) that positions and fixes (holds) the slide tray 83 at the standard position (see FIG. 3) and the extended position (see FIG. 5) with respect to the tray body 82. An example of the second locking mechanism is provided. By providing the second lock mechanism 90 and securely fixing the position of the slide tray 83, the slide tray 83 can be inadvertently slid or the slide tray 83 can be detached when the paper feed cassette 78 is inserted or removed. To prevent it.

  The second lock mechanism 90 includes a lock bar 95 and engagement receiving portions 92A and 92B. The lock bar 95 is provided on the upper surface of the sheet placing plate 83 </ b> A of the slide tray 83. The lock bar 95 extends in the sheet feeding direction 32 on the upper surface of the sheet placing plate 83A. The lock bar 95 is disposed at a position closer to the right side in FIG. 3 than the center of the sheet placement plate 83A. A recess (not shown) that is recessed downward is provided on the upper surface of the sheet placement wall 83A. The lock bar 95 is accommodated in the recess so as not to interfere with the recording paper accommodated in the paper placement surface 113. A rotating shaft 97 extending in the up-down direction 31 (direction perpendicular to the paper surface of FIG. 3) is projected from a position near the front plate 84 of the slide tray 83. The lock bar 95 is pivotally supported on the rotation shaft 97 so as to be able to swing substantially in the left-right direction 33 around the rotation shaft 97. In the present embodiment, the operation lever 96 is bent about the rotation shaft 97 in the right rotation direction (clockwise rotation direction) in FIG. A force for rotating the lock bar 95 in the counterclockwise rotation direction (counterclockwise rotation direction) in FIG. 3 acts. Note that the lock bar 95 may be provided at a position closer to the left side in FIG. 3 than the center of the sheet placement plate 83A.

  An operation lever 96 is provided on the lock bar 95. The operation lever 96 is bent in an L shape and extends rightward from the position of the rotation shaft 97 along the front plate 84. In other words, the operation lever 96 is provided in the vicinity of the upstream end of the paper feeding direction 32 in the paper placement plate 83A of the slide tray 83. Further, the end of the lock bar 95 on the downstream side in the paper feeding direction 32 is bent in an L shape toward the center of the paper placement plate 83A, and is a protrusion for engaging with the tray body 82. It is 98. The operation lever 96 is displaceable about an axis around the rotation shaft 97, and an engagement posture in which the protrusion 98 can be engaged with any of engagement receiving portions 92A and 92B described later, and the engagement receiving portion. It is displaced between the release postures deviating from 92A and 92B. That is, when the operation lever 96 is operated to the upstream side in the paper feeding direction 32 by the user, the operation posture is displaced from the engagement posture to the release posture.

  A guide rail 92 extending in the paper feeding direction 32 is integrally formed on the lower surface (back surface) of the paper placement plate 82 </ b> A of the main tray 82 so as to correspond to the lock bar 95. The guide rail 92 is provided with two engagement receiving portions (engagement receiving portions 92 </ b> A and 92 </ b> B) along the paper feeding direction 32 that can be hooked with the protrusion 98. The engagement receiving portions 92A and 92B are formed in a concave shape that opens toward the right side so that the protrusion 98 can be engaged.

  In the present embodiment, the protrusion 98 of the lock bar 95 is engaged with an engagement receiving portion 92A provided on the downstream side in the paper feeding direction 32, so that the slide tray 83 is in the standard position (with respect to the tray main body 82). (See FIG. 3). This state is a state in which the slide tray 83 is not extended with respect to the tray main body 82. Further, the protrusion 98 of the lock bar 95 engages with an engagement receiving portion 92B provided on the upstream side in the paper feeding direction 32, so that the slide tray 83 is in the extended position (see FIG. 5) with respect to the tray main body 82. ). This state is a state in which the slide tray 83 extends most with respect to the tray body 82.

  In this embodiment, the slide tray 83 is fixed at two positions with respect to the tray body 82. However, the fixed position is not limited to two positions, and the extended position, the standard position, and the intermediate position thereof. The fixing position may be set to 3 or more.

[Cover 79]
The cover 79 covers the upper surface of the slide tray 83 and functions to prevent dust from adhering to the recording paper accommodated on the paper placement surface 113 and to prevent moisture absorption of the recording paper. The cover 79 is attached to the upper part of the slide tray 83. Note that a part of the upper surface of the tray main body 82 of the main tray 20 is not covered with the cover 79 because the paper supply roller 25 is positioned when the paper supply cassette 78 is attached to the apparatus main body.

  Both ends of the cover 79 in the left-right direction 33 in FIG. 3 are supported by upper ends of side plates that are erected from both ends in the left-right direction 33 of the sheet placing plate 83 A of the slide tray 83. As shown in FIG. 6, an engagement recess 103 is provided on the upstream side of the cover 79 in the paper feeding direction 32. An opposite surface 81 on the opposite side (lower side) of the sheet discharge holding surface 80 is provided on a protruding wall 102 protruding downward from the upstream end of the opposite surface 81 in FIG. The protruding wall 102 is provided at both ends in the left-right direction 33. The engaging recess 103 is formed to open downward so as to engage with the boss portion 101 provided on the slide tray 83. The engaging recess 103 is formed at a position and size that can be fitted to the boss 101 provided on the slide tray 83. The boss portion 101 and the engaging recess 103 are engaged with each other, whereby the cover 79 and the slide tray 83 are engaged in a state where the cover 79 covers the upper surface of the slide tray 83. Therefore, the slide tray 83 is slidable with respect to the tray main body 82 while the boss portion 101 and the engaging recess 103 are in a state where the male and female are fitted. That is, when the slide tray 83 is slid in a state where the boss portion 101 and the engagement recess 103 are engaged with each other, the cover 79 moves in the same direction as the slide direction of the slide tray 83 along with the slide.

  Inside the cover 79, an accommodation space 86 (an example of the accommodation portion of the present invention) is provided. The accommodation space 86 is a space defined by the opposite surface 81 of the paper discharge holding surface 80 and the protruding wall 102 protruding downward from the upstream end of the opposite surface 81. The accommodation space 86 is configured to accommodate a rotation tray 43 of the second tray 21 described later. The rotating tray 43 is accommodated in the accommodating space 86 as necessary. A support mechanism for slidably supporting the rotating tray 43 is provided on the opposite surface 81 of the paper discharge holding surface 80. An opening 87 (see FIG. 6) is provided on the side wall of the cover 79 on the downstream side in the paper feeding direction 32, and the rotating tray 43 is supported so as to protrude from the opening 87. In this embodiment, as a support mechanism for the rotating tray 43, a rail groove (not shown) formed on the opposite surface 81 of the paper discharge holding surface 80 and a rail (not shown) provided at the left and right ends of the rotating tray 43. A known rail support mechanism consisting of By this rail support mechanism, the rotation tray 43 can slide with respect to the cover 79. The support mechanism for the rotation tray 43 is not limited to the rail support mechanism. Any support mechanism may be employed as long as the rotation tray 43 can slide with respect to the cover 79.

  A first protrusion 68 (an example of a first engagement member of the present invention) is provided in the accommodation space 86 of the cover 79. The first protrusion 68 is provided on the other end of the opposite surface 81 on the opposite side (lower side) of the paper discharge holding surface 80, on the opposite side to the engagement recess 103. The first protrusion 68 protrudes downward from the opposite surface 81. When the second tray 21 and the cover 79 are disposed at predetermined positions, the first protrusion 68 engages with the second protrusion 69 (an example of the second engagement member of the present invention) in the sliding direction to On the other hand, the movement of the second tray 21 is restricted. Conditions for engaging the first protrusion 68 and the second protrusion 69, specifically, the positions of the second tray 21 and the cover 79 when the first protrusion 68 and the second protrusion 69 are engaged will be described later. In addition, the 1st protrusion 68 and the 2nd protrusion 69 are examples of the control member of this invention.

[Second tray 21]
The second tray 21 is slidable along the paper feeding direction 32 above the tray body 82. That is, the second tray 21 is configured to be slidable in the same direction as the slide direction of the slide tray 83. In the present embodiment, the second tray 21 includes a sliding plate 42 (an example of the moving member of the present invention) and a rotating tray 43 (an example of the rotating member of the present invention).

[Sliding plate 42]
The sliding plate 42 is supported at the upper part of the tray body 82 so as to be movable in the paper feeding direction 32. As shown in FIG. 4, the sliding plate 42 is a plate-like member having substantially the same size as the size in the left-right direction 33 of the tray main body 82, and the direction along the paper feeding direction 32 with respect to the tray main body 82. Is slidably supported. As a support mechanism for the sliding plate 42, for example, the upper ends of the left and right side plates of the tray body 82 function as rails, and there are reverse U-shaped sliding grooves (not shown) provided at both ends of the sliding plate 42. A well-known mechanism such as a rail support mechanism configured by engaging with the left and right side plates can be employed. The sliding plate 42 is not limited to a mechanism that is slidably supported, and any supporting mechanism is applicable as long as the sliding plate 42 is supported so as to be movable in the direction along the paper feeding direction 32 at the upper portion of the tray body 82. .

  In the present embodiment, the sliding plate 42 is located between the paper feed position shown in FIG. 4 (corresponding to the third position of the present invention) and the retracted position shown in FIG. 3 (corresponding to the fourth position of the present invention). It is possible to slide with. The paper feeding position is a position where recording paper can be fed from the rotating tray 43 of the second tray 21. The retracted position is a position where the sheet feeding arm 26 can be guided to the tray body 82 side by retracting to the upstream side in the sheet feeding direction 32 from the sheet feeding position.

  A first locking mechanism 50 is disposed on the sliding plate 42 to position and fix (hold) the sliding plate 42 to the tray body 82 at the paper feeding position (see FIG. 4) and the retracted position (see FIG. 3). (An example of the first locking mechanism of the present invention) is provided. The first lock mechanism 50 is provided at the right end of the sliding plate 42. By providing the first lock mechanism 50, the position of the sliding plate 42 can be reliably fixed. The first lock mechanism 50 may be provided at the left end portion of the sliding plate 42 or may be provided at both end portions of the sliding plate 42.

  The first lock mechanism 50 includes an engagement piece 51 and a lever 52. The lever 52 is supported so that the upper surface of the sliding plate 42 can slide in the left-right direction 33. An engagement piece 51 is disposed on the lower surface (back surface) of the sliding plate 42. The engaging side 51 is interlocked with the lever 52 and moves in the same direction when the lever 52 is slid in the left-right direction 33. The sliding range of the lever 52 includes a lock position (see FIG. 3) in which the engagement piece 51 protrudes rightward from the right end portion of the sliding plate 42, and the engagement piece 51 is immersed inward from the right end portion of the sliding plate 42. It is set between the unlock position. The lever 52 is biased toward the unlock position by a spring or the like (not shown).

  In the present embodiment, the engaging piece 51 is inserted into the two engaging grooves 54 and 55 provided in the side plate 88 of the tray main body 82, so that the sliding plate 42 is in the above-described feeding position ( 4) and the retracted position (see FIG. 3). For example, as shown in FIG. 3, when the slide tray 83 is disposed at the standard position and the sliding plate 42 is disposed at the retracted position, the engagement piece 51 is inserted into the engagement groove 85. Thus, the sliding plate 42 is fixed at the retracted position. When the lever 52 is slid to the left from this state, the engagement between the engagement piece 51 and the engagement groove 85 is released, and the slide plate 42 can be slid rearward. When the sliding plate 42 is slid to the paper feeding position and the engaging piece 51 is inserted into the engaging groove 54, the sliding plate 42 is fixed at the paper feeding position.

  At both ends of the sliding plate 42 in the left-right direction 33, a rotation support mechanism for rotatably supporting the rotation tray 43 is provided. The rotation support mechanism includes a rotation shaft 45 provided at the downstream end of the rotation tray 43 in the paper feeding direction 32 and a shaft hole (not shown) that supports the rotation shaft 45. With this rotation support mechanism, the rotation tray 43 can be rotated in the vertical direction 31 about the rotation shaft 45. The rotating tray 43 is slidably supported by the support mechanism described above in the accommodation space 86 of the cover 79. Therefore, when the rotation tray 43 is rotated with respect to the sliding plate 42, as shown in FIG. 8, the cover 79 is also rotated integrally with the rotation tray 43 in the same direction. 8A shows a state in which the rotating tray 43 is accommodated in the accommodation space 86 in a state where the sliding plate 42 is in the retracted position, and FIG. In the state where the moving plate 42 is in the retracted position, the state where the rotating tray 43 is pulled out from the accommodation space 86 is shown.

[Rotating tray 43]
As shown in FIGS. 3 to 5, the rotating tray 43 has substantially the same size as the tray main body 82 in the horizontal direction 33 in the figure. As shown in FIGS. It is formed in a rectangular box shape in which the dimension in the paper feeding direction 32 is approximately half that of the tray body 82. The rotating tray 43 is configured to be able to accommodate a plurality of recording sheets stacked in a substantially horizontal state. The rotating tray 43 can accommodate a small size recording sheet such as a postcard, an envelope, and L-size glossy paper for recording a photographic image taken by a digital camera or the like in the central portion in the left-right direction 33. It is configured.

  A pair of side guides 46, which are well-known mechanisms, are supported on the paper placement plate 43 </ b> A of the rotation tray 43 so as to be slidable in the left-right direction 33 (width direction). A recording sheet is accommodated in a space sandwiched between the side guides 46. When the side guides 46 are brought into contact with the left and right ends of the stored recording paper, the recording paper is positioned such that the central position of the recording paper 33 in the left-right direction 33 becomes the reference position.

  A second protrusion 69 is provided on the rotating tray 43. The second protrusion 69 is provided at the upstream end portion of the rotation tray 43 in the paper feeding direction 32. The second protrusion 69 protrudes upward from the upper surface of the rotating tray 43. When the second protrusion 69 is engaged with the first protrusion 68, the second tray 21 is restricted from moving backward with respect to the cover 79.

  When the paper feed cassette 78 is inserted into the opening 13 with the sliding plate 42 disposed at the paper feed position (see FIG. 4), the separation inclined plate 22 is brought into contact with the paper feed arm 26 to feed the paper. The paper arm 26 is lifted upward, and the paper feed roller 25 contacts the recording paper on the rotating tray 43. Thus, the recording paper stored in the rotating tray 43 by the paper supply roller 25 can be fed toward the recording unit 24.

  On the other hand, in a state where the sliding plate 42 is disposed at the retracted position (see FIG. 3), the space between the sliding plate 42 and the separation inclined plate 22 is opened, and the tray body 82 side of the paper feed roller 25 (downward) Side). Therefore, when the paper feed cassette 78 is inserted into the opening 13 with the sliding plate 42 disposed at the retracted position, the paper feed arm 26 is brought into contact with the paper feed arm 26 by the separation inclined plate 22 coming into contact with the paper feed arm 26. The paper feed roller 25 is lifted upward and comes into contact with the recording paper on the tray main body 82. As a result, the recording paper stored in the main tray 20 by the paper supply roller 25 can be fed toward the recording unit 24.

[Operation of Paper Feed Cassette 78]
Hereinafter, the sliding operation of the slide tray 83 and the slide plate 42 in the paper feed cassette 78 configured as described above will be described with reference to FIGS. In FIGS. 6 to 8, the guide rail 92, the lock bar 95, and the lever 52 are not shown for convenience of explanation.

  FIG. 6A shows a state in which the slide tray 83 is disposed at the standard position and the sliding plate 42 is disposed at the retracted position. In this state, the rotation tray 43 is accommodated in the accommodation space 86. From the state of FIG. 6A, the engagement between the engagement piece 51 and the engagement groove 55 of the first lock mechanism 50 is released in order to accommodate the recording paper in the rotating tray 43, and FIG. As shown in FIG. 4, when the sliding plate 42 is slid toward the separating inclined plate 22, the second protrusion 69 approaches the first protrusion 68. Then, as shown in FIG. 6C, when the sliding plate 42 is slid to the paper feeding position, the engaging piece 51 engages with the engaging groove 55 and the sliding plate 42 moves to the tray body 82. The second projection 69 abuts against the first projection 68 while being fixed to the first projection 68. The paper feed cassette 78 of the present embodiment is configured so that A3 paper cannot be set in the main tray 20 when recording paper can be fed from the rotating tray 43. That is, in the state of FIG. 6C, even if the user tries to pull out the slide tray 83 after releasing the engagement by the lock bar 95 in order to use A3 paper, the first protrusion 68 and the second protrusion 69 are engaged. To do. For this reason, when the recording paper can be fed from the rotating tray 43, the slide of the slide tray 83 is restricted.

  FIG. 7A shows a state in which the slide tray 83 is disposed at the standard position and the slide plate 42 is disposed at the retracted position, as in FIG. 6A. From the state shown in FIG. 7A, the engagement between the protrusion 98 of the lock bar 95 and the engagement receiving portion 92A is released in order to expand the paper placement surface 113 to accommodate the A3 paper, and FIG. As shown in B), when the cover 79 is slid to the front plate 84 side together with the slide tray 83, the first protrusion 68 approaches the second protrusion 69. Then, as shown in FIG. 7C, when the slide tray 83 is slid to the extended position, the projecting portion 98 engages with the engagement receiving portion 92B and the slide tray 83 is fixed to the tray body 82. At the same time, the first protrusion 68 contacts the second protrusion 69. In this state, A3 paper can be stored in the main tray 21. The paper feed cassette 78 of the present embodiment is configured so that the slide plate 42 cannot be moved to the paper feed position when the main tray 21 is capable of accommodating A3 paper. That is, in the state of FIG. 7C, after the user releases the engagement between the engagement piece 51 and the engagement groove 55 of the first lock mechanism 50, the slide plate 42 is moved to the separation inclined plate 22 side. Even so, the first protrusion 68 and the second protrusion 69 are engaged. For this reason, when the A3 sheet can be stored in the main tray 21, the sliding of the sliding plate 42 is restricted.

[Operational effects of this embodiment]
As described above, since the first protrusion 68 and the second protrusion 69 are provided in the paper feed cassette 78, the paper feed cassette 78 accommodates the maximum size recording paper (for example, A3 paper) in the main tray 20. When this is done, the upper portion of the slide tray 83 is always covered with the cover 79. Further, in this state, even if the sliding plate 42 is slid from the retracted position to the paper feeding position for the purpose of feeding the recording paper from the rotating tray 43, the sliding plate 42 is in contact with the tray main body at the retracted position. Maintain a fixed state. At this time, the upper surface of the main tray 20 on the upstream side in the paper feeding direction 32 is covered with the cover 79 and the rotating tray 43 that is pulled out from the cover 79 to the maximum. Accordingly, when the sheet cassette 78 containing A3 sheets stored in the main tray is mounted on the multifunction machine 10, both sides of the sheet cassette 78 in the left-right direction 33 are gripped by both hands of the user, and the sheet cassette 78 is lifted. In this case, the main tray 20, the cover 79, and the second tray 21 are integrated, and these members cooperate with each other to increase the rigidity of the paper feed cassette 78. Thus, the paper feed cassette 78 having the paper placement surface 113 that is greatly enlarged without changing the thickness or material of each member of the paper feed cassette 78 and without increasing the size and weight of the height and width. Therefore, it is possible to secure sufficient rigidity to accommodate a plurality of A3 sheets.

Second Embodiment
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 9 and 10. 9 and 10 are schematic cross-sectional views schematically showing the cross-sectional structure of the paper feed cassette 118.

  The paper feed cassette 118 according to the second embodiment is different from the paper feed cassette 78 according to the first embodiment described above in that the first projection 68 and the second projection 69 are not provided on the paper feed cassette 118. An upper engagement tool 120 (an example of a fourth engagement member of the present invention) and a lower engagement tool 125 (an example of a third engagement member of the present invention) are provided. In the following embodiments, the same reference numerals as those used for the components of the first embodiment are assigned to the same components as those in the first embodiment, and the description thereof is omitted.

  As shown in FIG. 9, the upper engagement tool 120 is provided on the sliding plate 42. The upper engagement tool 120 is formed in an arm shape that extends horizontally from the back surface (lower surface) of the sliding plate 42 to the upstream side (front plate 84 side) in the paper feeding direction 32, and the upper engagement tool 120. A hook portion 121 bent toward the downstream side in the paper feeding direction 32 is provided at the upstream end portion. On the other hand, the upper engagement tool 125 is provided on the slide tray 83. The lower engagement tool 125 is formed in the shape of an arm that extends horizontally downstream from the downstream end (separation inclined plate 22 side) of the upper surface of the slide tray 83 in the paper feeding direction 32. A hook portion 126 bent toward the upstream side in the paper feeding direction 32 is provided at the downstream end portion of the side engagement tool 125. The hook part 121 and the hook part 126 are formed at positions and sizes that can be engaged with each other. The upper engaging tool 120 and the lower engaging tool 125 are arranged at both ends or one end in the left-right direction 33 (direction perpendicular to the paper surface of FIG. 9) so as not to interfere with the recording paper stored on the paper placing surface 113. Has been placed.

[Operation of Paper Feed Cassette 118]
Since the paper feed cassette 118 is configured as described above, the slide tray 83 and the slide plate 42 operate as follows.

  FIG. 9A shows a state where the slide tray 83 is disposed at the standard position and the sliding plate 42 is disposed at the retracted position. In this state, the rotation tray 43 is accommodated in the accommodation space 86. Further, the hook portion 121 is disposed at a position farthest from the hook portion 126 toward the upstream side in the paper feeding direction 32. From the state of FIG. 9A, the engagement between the engagement piece 51 and the engagement groove 55 of the first lock mechanism 50 is released in order to accommodate the recording paper in the rotating tray 43, and FIG. As shown in FIG. 4, when the sliding plate 42 is slid toward the separating inclined plate 22, the hook portion 121 approaches the hook portion 126. Then, as shown in FIG. 9C, when the sliding plate 42 is slid to the paper feeding position, the engaging piece 51 engages with the engaging groove 55 and the sliding plate 42 moves to the tray main body 82. The hook part 121 is disposed at a position close to the hook part 126 while being fixed to the hook part 126. In this state, the recording paper can be stored in the rotating tray 43. The paper feed cassette 118 according to the present embodiment is configured so that A3 paper cannot be easily replenished to the main tray 20 when recording paper can be fed from the rotating tray 43. That is, in the state shown in FIG. 9C, when the user tries to replenish A3 paper to the main tray 20 and tries to pull out the slide tray 83 to the upstream side in the paper feeding direction 32 after the engagement by the lock bar 95 is released, 121 and the hook portion 126 engage with each other. For this reason, when recording paper can be fed from the rotating tray 43, sliding of the slide tray 83 to the upstream side in the paper feeding direction 32 is restricted.

  FIG. 10A shows a state in which the slide tray 83 is disposed at the standard position and the slide plate 42 is disposed at the retracted position, as in FIG. 9A. From the state of FIG. 10A, the engagement between the protrusion 98 of the lock bar 95 and the engagement receiving portion 92A is released in order to expand the paper placement surface 113 to accommodate the A3 paper, and FIG. As shown in B), when the cover 79 is slid to the upstream side in the paper feeding direction 32 together with the slide tray 83, the hook portion 126 approaches the hook portion 121. Then, as shown in FIG. 10C, when the slide tray 83 is slid to the extended position, the projecting portion 98 engages with the engagement receiving portion 92B and the slide tray 83 is fixed to the tray main body 82. In addition, the hook portion 126 is disposed at a position close to the hook portion 121. In this state, A3 paper can be stored in the main tray 21. The paper feed cassette 118 of the present embodiment is configured so that the sliding plate 42 cannot be moved to the paper feed position when the main tray 21 is capable of accommodating A3 paper. That is, in the state of FIG. 10C, after the user releases the engagement between the engagement piece 51 and the engagement groove 55 of the first lock mechanism 50, the sliding plate 42 is moved downstream in the paper feeding direction 32. When trying to do so, the hook part 121 and the hook part 126 engage. For this reason, when the A3 sheet can be accommodated in the main tray 21, the sliding of the sliding plate 42 to the rear is restricted.

  As described above, since the upper engaging tool 120 and the lower engaging tool 125 are provided in the sheet feeding cassette 118, the same operational effects as those of the first embodiment described above are exhibited.

DESCRIPTION OF SYMBOLS 10 ... Multifunction machine 11 ... Printer part 20 ... Main tray 21 ... Second tray 24 ... Recording part 25 ... Paper feed roller 26 ... Paper feed arm 42 ... Sliding Plate 43 ... Turning tray 50 ... First lock mechanism 68 ... First protrusion 69 ... Second protrusion 86 ... Storage space 90 ... Second lock mechanism 101 ... Boss 103 ... engaging recess 113 ... paper placing surface 120 ... upper engaging tool 125 ... lower engaging tool

Claims (7)

A tray main body, and a slide tray that is slidable with respect to the tray main body between a first position where a paper placement surface of a predetermined size is formed and a second position where the predetermined paper placement surface is extended. A first tray;
A cover member provided on an upper portion of the slide tray and covering an upper surface of the slide tray;
Provided above the tray body so as to be slidable in the same direction as the slide direction of the slide tray between a third position where the stored paper can be fed and a fourth position where the stored paper cannot be fed. A second tray,
A regulating member that regulates sliding of the second tray from the fourth position to the third position in a state where the slide tray is disposed at the second position;
A paper feed cassette comprising: a first lock mechanism that fixes the second tray to the tray body in a state where the second tray is disposed at the fourth position. The regulating member is
A first engagement member provided on the cover member;
The second tray is provided on the second tray, and engages with the first engagement member in a state where the slide tray is disposed at the second position, thereby restricting the slide of the second tray to the third position. The paper feed cassette according to claim 1, further comprising two engaging members. The regulating member is
A third engagement member provided on the slide tray;
The second tray is provided on the second tray, and engages with the third engagement member in a state where the slide tray is disposed at the second position, thereby restricting the slide of the second tray to the third position. The paper feed cassette according to claim 1, further comprising: 4 engaging members. The cover member includes an accommodating portion that can accommodate the second tray, and a support mechanism that slidably supports the second tray.
The third position is a position where the second tray is pulled out from the housing portion in a state where the slide tray is disposed at the first position.
The fourth position is a position where the second tray is accommodated in the accommodating portion in a state where the slide tray is disposed at the first position, and the slide tray is disposed at the second position. The paper feed cassette according to any one of claims 1 to 3, wherein the second tray is in a state where the second tray is pulled out from the housing portion.   5. The paper feed cassette according to claim 1, further comprising a fifth engagement member that engages the slide tray and the cover member in a state where an upper surface of the slide tray is covered with the cover member.   The paper feed cassette according to any one of claims 1 to 5, further comprising a second lock mechanism that fixes the slide tray to the tray body in a state where the slide tray is disposed at the second position. The second tray is
A moving member that is provided at the top of the tray body and is slidably supported in the same direction as the slide tray;
The sheet feeding cassette according to claim 1, further comprising a rotating member that is rotatably supported by the moving member and is capable of storing paper.

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