JP5094982B2 - Medium conveying apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a medium conveying apparatus having a medium stacking unit and an image forming apparatus that includes the medium conveying apparatus and forms an image on a recording material.

  2. Description of the Related Art Conventionally, a paper feed tray or a paper discharge tray has a main tray that can be opened and closed on the side or front and back of the main body of the image forming apparatus, and a plurality of slidable or foldable attachments to the main tray. And an auxiliary tray. The main tray is set to correspond to standard size paper, and the auxiliary tray is a paper tray or paper output tray that is set to a standard length when pulled out from the main tray. Provided (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-137078 (page 4, FIG. 1)

  However, with the downsizing of the apparatus, for example, when the tray is stored, the shape of the tray tends to be determined so that protrusions such as an operation panel and a cover lock can escape. Therefore, when the folded auxiliary tray is opened, a hole is formed in the engaging part of the main tray and the auxiliary tray, or a step or gap is formed in the connecting part. May be caught, causing bending, buckling, breakage, and the like. In order to avoid such inconvenience, the recording paper must be set with great care, and there is a problem in the ease of paper handling.

  The object of the present invention is to solve the above-mentioned problems, so that even when a gap is formed between the main tray and the auxiliary tray, the recording paper can always be safely placed, An object of the present invention is to provide a medium conveying apparatus and an image forming apparatus that can also improve easiness.

A medium conveying apparatus according to the present invention is a medium conveying apparatus having an apparatus main body and a medium placing section that can be at least partially accommodated in the apparatus main body, wherein the medium placing section includes:
A medium mounting base that engages with the apparatus main body and is pivotable with respect to the apparatus main body, and a first displacement that engages with the medium mounting base and stacks the medium together with the medium mounting base. A second placement portion capable of taking a state and a second displacement state overlapping the medium placement base, and disposed at a boundary portion between the medium placement base and the second placement portion, and provided at one end side. The above-mentioned rotation fulcrum is provided on the medium mounting substrate side, and has an auxiliary member that is rotatably provided.

  An image forming apparatus according to the present invention includes the above-described medium transport device and an image forming unit that forms an image on a medium loaded on the medium mounting unit.

The medium conveying apparatus according to the reference example is a medium conveying apparatus having an apparatus main body and a medium placing section that can be at least partially accommodated in the apparatus main body, and the medium placing section includes:
A first placement portion that engages with the apparatus main body and is capable of displacing a position of a medium to be loaded, a first displacement state in which the medium is loaded together with the first placement portion, and the first placement. A second placement part that can take a second displacement state overlapping the part, and a second placement part that is movable in conjunction with the displacement of the second placement part, wherein the second placement part is the first placement part. In the displacement state, it has an auxiliary member arranged at a boundary portion between the first placement portion and the second placement portion.

Another medium transport apparatus according to the reference example is a medium transport apparatus having an apparatus main body and a medium mounting section that can be accommodated at least in part in the apparatus main body.
A holding member held in the apparatus main body so as to be displaceable in a storage position and an operating position, and held in the holding member so as to be displaceable, and when the holding member is in the operating position, adjacent to the apparatus main body A first placement portion capable of displacing a position of a medium to be loaded, and a holding member that is displaceably held, and when the holding member is in the operating position, the first placement portion is adjacent to the first placement portion. A second placement portion capable of taking a first displacement state in which the medium is loaded together with the first placement portion and a second displacement state overlapping the first placement portion; and the second placement portion. It is provided so as to be movable in conjunction with the displacement of the mounting portion, and when the second mounting portion is in the first displacement state, the boundary portion between the first mounting portion and the second mounting portion is provided. And an auxiliary member to be arranged.

Still another medium conveying apparatus according to the reference example is a medium conveying apparatus having an apparatus main body and a medium placing section that can be at least partially accommodated in the apparatus main body, and the medium placing section includes:
A holding member held in the apparatus main body so as to be displaceable in a storage position and an operating position, and held in the holding member so as to be displaceable, and when the holding member is in the operating position, adjacent to the apparatus main body A first placement portion capable of displacing a position of a medium to be loaded; and a holding member that is displaceably held. When the holding member is in the operating position, the first placement portion is adjacent to the first placement portion. A second placement portion capable of taking a first displacement state in which the medium is loaded together with the first placement portion and a second displacement state overlapping the first placement portion, and displaceable to the holding member When the holding member is in the operating position, the auxiliary member is disposed at a boundary portion between the first placement portion and the second placement portion.

Still another medium conveying apparatus according to the reference example is a medium conveying apparatus having an apparatus main body and a medium placing section that can be at least partially accommodated in the apparatus main body, and the medium placing section includes:
A holding member held in the apparatus main body so as to be displaceable in a storage position and an operating position, and held in the holding member so as to be displaceable, and when the holding member is in the operating position, adjacent to the apparatus main body A first placement portion capable of displacing a position of a medium to be loaded; and a holding member that is displaceably held. When the holding member is in the operating position, the first placement portion is adjacent to the first placement portion. A second placement portion capable of taking a first displacement state in which the medium is loaded together with the first placement portion and a second displacement state overlapping the first placement portion; A sheet-like auxiliary member that is fixed to the mounting portion, and the other end side of which is wound around a winding member that is rotatably held by applying a rotational force to the holding member in one direction and is kept in a tension state; Have
The auxiliary member is arranged at a boundary portion between the first placement portion and the second placement portion when the second placement portion is in the first displacement state.

  According to the present invention, there is no gap at the boundary portion between the first placement portion and the second placement portion, so that the medium can be prevented from being damaged at the boundary portion.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view showing a configuration of a first embodiment of a medium carrying device according to the present invention. 1 is a main part configuration diagram schematically showing a main part configuration of an image forming apparatus according to the present invention that employs a medium conveying device according to a first embodiment; (A) is the principal part block diagram which shows these in a simplified model, in order to demonstrate the attachment relationship of the exterior cover part, paper mounting board, 1st auxiliary tray, and auxiliary mounting board in Embodiment 1. (B), (c), (d) are partial configuration diagrams for explaining the mounting configuration in each part. FIG. 10 is an explanatory diagram illustrating a state in which a paper feed tray is in a storage position folded to the medium conveyance device body side and is locked by a lock unit. (A)-(g) is the operation | movement figure which showed the operation | movement at the time of accommodating the paper feed tray in the medium conveying apparatus of Embodiment 1 to this machine side later on. FIG. 10 is a partial configuration diagram illustrating another modification of the paper feed tray according to the first embodiment. (A) is simplified in order to explain the attachment relationship between the exterior cover section, the paper loading plate, the first auxiliary tray, and the auxiliary loading plate in the paper feed tray according to the second embodiment of the present invention. It is a principal part block diagram shown and modeled, (b) is a partial block diagram which shows the structure of a rotation support part. In Embodiment 2, it is a side view which shows the height relationship of each paper mounting surface when a paper mounting plate exists in a reference position, and a 1st auxiliary tray and an auxiliary mounting plate exist in a fully open position. (A)-(e) is the operation | movement figure which showed the operation | movement at the time of accommodating the paper feed tray of Embodiment 2 to this machine side later on. FIGS. 9A to 9E are operation diagrams illustrating states of FIGS. 9A to 9E viewed from the back side (exterior cover portion side) of the medium stacking surface. (A) is simplified in order to explain the attachment relationship of the exterior cover portion, the paper placement plate, the first auxiliary tray, and the auxiliary placement sheet in the paper feed tray according to the third embodiment of the present invention. It is a principal part block diagram shown and modeled, (b) is a partial block diagram which shows the structure of a rotation support part. In Embodiment 3, it is a side view which shows the state of each part when a paper mounting board exists in a reference position, and a 1st auxiliary tray exists in a fully open position. (A)-(d) is the operation | movement figure which showed the operation | movement at the time of accommodating the paper feed tray of Embodiment 3 to this machine side later on. (A) is a block diagram which shows the structure of the paper feed tray of Embodiment 4, and the same figure (b) is a principal part block diagram around the two-dot chain line in (a). (A) is a state where the first auxiliary tray is lifted in the direction of arrow A to accommodate the first auxiliary tray, and the first auxiliary tray is rotated 90 degrees or more, and (b) is a claw portion surrounded by a two-dot chain line at this time The state of is shown. (A) is simplified in order to explain the attachment relationship between the exterior cover portion, the paper placing plate, the first auxiliary tray, and the auxiliary placing plate in the paper feed tray according to the fifth embodiment of the present invention. It is a principal part block diagram shown modeling, (b) is a block diagram of the part by which the roller is arrange | positioned.

Embodiment 1 FIG.
FIG. 1 is an external perspective view showing a configuration of a first embodiment of a medium conveying apparatus according to the present invention. FIG. 2 schematically shows a main configuration of an image forming apparatus according to the present invention that employs the medium conveying apparatus. It is a principal part block diagram shown in FIG.

First, the image forming apparatus shown in FIG. 2 will be described.
An image forming apparatus 1000 shown in FIG. 2 has a configuration as a color electrophotographic printer, for example. In the drawing, a paper feed tray 100 is detachably attached to the main body of the image forming apparatus 1000 and accommodates a recording paper 101 as a recording medium stacked therein. Inside the paper feed tray 100, a paper placement plate 102 is rotatably provided on the support shaft 102a, and more than half of the recording paper 101 on the feeding side is placed on the paper placement plate 102. Further, the paper feed tray 100 is provided with a guide member (not shown) that regulates the stacking position of the recording paper 101, and the direction and the paper orthogonal to the feeding direction of the recording paper 101 (the negative direction of the X axis in the figure). The side surface of the paper is regulated in the feeding direction, and the stacking position of the recording paper 101 to be stored is kept constant.

  On the feeding side of the paper feed tray 100, a lift-up lever 104 that is rotatably provided on the support shaft 104a is provided. The support shaft 104a is engaged with the motor 105 so as to be able to contact and separate. When the paper feed tray 100 is mounted on the main body of the image forming apparatus 1000, the lift-up lever 104 and the motor 105 are engaged, and a control unit (not shown) drives the motor 105. As the lift-up lever 104 rotates, the tip of the lift-up lever 104 lifts the bottom of the paper stacking plate 102, and the recording paper 101 stacked on the paper stacking plate 102 rises. When the recording paper 101 rises to a certain height, the rise detection unit 106 detects it, and a control unit (not shown) stops the motor 105 based on the detected information.

  A paper feeding unit 200 that feeds the recording paper 101 one by one is provided on the feeding side of the paper feed tray 100. The paper feeding unit 200 includes a pickup roller 201 provided so as to be pressed against the recording paper 101 raised to a certain height, a feed roller 202 and a retard roller for separating the recording paper 101 fed by the pickup roller 201 one by one. 203 roller pairs are provided. Further, the paper feeding unit 200 is provided with a paper presence / absence detecting unit 204 that detects the presence / absence of the recording paper 101 and a remaining paper amount detecting unit 205 that detects the remaining amount of paper.

  The recording paper 101 that has been fed out from the paper feeding unit 200 by one sheet is sent to the paper transport unit 300. The fed recording paper 101 passes through the paper sensor 301 and is sent to the conveying roller pair 302. The conveyance roller pair 302 is started to rotate by a driving unit (not shown) at a timing delayed by a predetermined time from the time when the recording paper 101 passes the paper sensor 301. For this reason, the recording sheet 101 is pushed into the pressure contact portion of the conveying roller pair 302 in a slightly bent state, and the skew is corrected. The recording paper 101 sent out from the transport roller pair 302 passes through the paper sensor 303 and is sent to the transport roller pair 304. The conveyance roller pair 304 is rotated by a driving unit (not shown) from the time when the recording paper 101 passes through the paper sensor 303 and feeds the recording paper 101 without stopping. The recording paper 101 sent out by the conveying roller pair 304 passes through the writing sensor 305 and is sent to the image forming unit 400.

  The image forming unit 400 includes four toner image forming units 430 arranged in series, and a transfer unit 460 that transfers the toner image formed by the toner image forming unit 430 to the upper surface of the recording paper 101 by Coulomb force. The four toner image forming units 430 arranged in series have the same configuration, and only the colors of the toners used, that is, yellow (Y), magenta (M), cyan (C), and black (K) only. Is different. Therefore, for the sake of simplicity, only the yellow (Y) toner image forming unit 430 is shown in the configuration, and the other toner image forming units 430 are omitted, and only the photosensitive drum 431 is shown.

  The toner image forming unit 430 includes a photosensitive drum 431 that carries a toner image, a charging roller 432 that charges the surface of the photosensitive drum 431, and an LED head 433 that includes an LED array that forms an electrostatic latent image on the surface of the charged photosensitive drum 431. A developing roller 434 that forms a toner image on the electrostatic latent image by frictional charging; a toner supply unit 436 that supplies toner; and a cleaning blade 435 that scrapes off residual toner remaining on the surface of the photosensitive drum 431 after transfer.

  The transfer unit 460 is paired with a transfer belt 461 that electrostatically attracts and conveys a sheet, a drive roller 462 that is rotated by a drive unit (not shown) to drive the transfer belt 461, and a drive roller 462. A tension roller 463 that is stretched, a transfer roller 464 that is disposed so as to be in pressure contact with the photosensitive drum 431 of the toner image forming unit 430 and applies a voltage to transfer the toner image onto the recording paper 101, and a transfer belt 461. A cleaning blade 465 for scraping and cleaning the adhering toner and a toner box 466 for accumulating the toner scraped off by the cleaning blade 465 are provided.

  The toner image forming unit 430 and the transfer belt 461 are driven in synchronization, and the respective color toner images are sequentially superimposed and transferred onto the recording paper 101 electrostatically attracted to the transfer belt 461. The recording paper 101 to which the image is transferred by the image forming unit 400 in this way is sent to the fixing unit 500 that fuses the toner image to the recording paper 101 with heat and pressure.

  The fixing unit 500 includes a halogen lamp 503 serving as a heat source therein, and includes a roller pair of an upper roller 501 and a lower roller 502 whose surfaces are formed of an elastic body, and the toner on the recording paper 101 sent from the image forming unit 400. Heat and pressure are applied to the image to melt the toner image and fix it on the recording paper 101. Thereafter, the recording paper 101 is discharged to the stacker unit 505 by the discharge roller pair 504.

  On the other hand, the image forming apparatus 1000 includes a paper feed tray 600 as a second paper feed unit. The paper feed tray 600 has a function similar to that of the paper feed tray 100, and is generally called MPT (Multi Purpose Tray) or manual feed tray. The paper feed tray 100 cannot handle the thin paper, thick paper, It corresponds to narrow paper, long paper, special media, etc. and is often used in a wide variety. In particular, when paper is fed from the paper feed tray 100, there is a paper travel route that is largely curved by the paper transport unit 300, so that the paper travel load increases. For this reason, a straight path structure that is possible by using the paper feed tray 600 is utilized for thick paper that is strong and long paper that cannot fit in the paper feed tray 100.

  As will be described later, the paper feed tray 600 is rotatably mounted on the main body of the image forming apparatus 1000, and is opened when the recording paper 601 is stacked. When the paper feed tray 600 is opened, a pickup roller 701 described later is pulled out from the inside of the apparatus by a hopper mechanism (not shown). A paper placement plate 602 is provided on the paper feed tray 600 so as to be rotatable by a rotation support portion 651 a, and the recording paper 601 is stacked on the paper placement plate 602.

  The paper feed tray 600 is provided with a guide member (not shown) for regulating the stacking position of the recording paper 601 in the direction orthogonal to the feeding direction of the recording paper 601 (the positive direction of the X axis in the drawing) and the paper feeding direction. The side of the paper is regulated and the placement position is kept constant on the recording paper 601 to be stored. Further, the paper feed tray 600 has a first auxiliary tray 607 and a second auxiliary tray 608 (FIG. 1), which will be described later, in order to stack sheets that are long in the paper traveling direction.

  In order to control the position of the recording paper 601 on the paper placement plate 602, the paper feed tray 600 is engaged with a paper placement plate 602 rotatably provided by a turning support portion 651 a on the paper feeding side. The lift-up mechanism 704 is provided to control the height of the front end portion of the sheet placing plate 602.

  A paper feeding unit 700 that feeds the recording paper 601 one by one is provided on the paper feeding side of the paper feed tray 600. This has the same function as the paper feeding unit 200 described above. The paper feeding unit 700 includes a pickup roller 701 provided so as to be pressed against the recording paper 601 raised to a certain height, a feed roller 702 that separates the recording paper 601 fed by the pickup roller 701 one by one, and a retard roller 703. A roller pair is provided. Further, the paper feeding unit 700 is provided with a paper presence / absence detection unit (not shown) that detects the presence or absence of the recording paper 601 and a paper remaining amount detection unit (not shown) that detects the remaining amount of paper. The sheet presence / absence detection unit and remaining sheet detection unit (not shown) are provided in the same manner as the sheet presence / absence detection unit 204 and remaining sheet detection unit 205 in the sheet feeding unit 200 described above.

  The recording paper 601 fed out by one sheet from the paper feeding unit 700 is sent to the paper transport unit 300 and is transported in the same manner as the recording paper 101 sent out from the paper feed tray 100 described above.

  Note that the XYZ coordinates in the figure are the X axis in the transport direction when the recording paper 101 passes through each toner image forming unit 430 and the Y axis in the rotation axis direction of the photosensitive drum 431. The Z axis is taken in the orthogonal direction. Further, when XYZ coordinates are shown in other drawings to be described later, the axial directions of these coordinates indicate a common direction. That is, the XYZ axes in each drawing indicate the arrangement direction when the depicted portion of each drawing constitutes the image forming apparatus 1000 shown in FIG.

  FIG. 1 is an external perspective view showing the main configuration of the medium carrying device according to the first embodiment of the present invention. As shown in the figure, here, the medium transport device 720 includes a paper feed tray 600, a support portion 711, a lock portion 610, a pickup roller 701, a feed roller 702, a retard roller 703, a lift-up mechanism 704, etc. shown in FIG. including.

As will be described later, a paper feed tray 600 serving as a medium placement unit is rotatable to an exterior cover part (holding member) 606 that is rotatably supported by a support part 711 of the medium transport apparatus body, and to the exterior cover part 606. The side of the recording paper 601 (FIG. 2) that is formed on the paper placement plate (first placement portion) 602 and the paper placement plate 602 on which the recording paper 601 is loaded is regulated. A first auxiliary tray (second loading portion) 607 for holding a long recording sheet in the sheet traveling direction, and a first auxiliary tray. A pair of second auxiliary trays 608 that are rotatably held by the tray 607 and a first auxiliary tray 607 that are rotatably held by the paper trays 602 and the first auxiliary tray 607. Auxiliary placement plate that covers the boundary ( Having co member) 609.

  When not required, the pair of second auxiliary trays 608 are rotated in the directions of arrows G and H, respectively, and stored in the lower part of the first auxiliary tray 607 as shown in FIG.

  FIG. 3A illustrates a simplified model of the exterior cover 606, the paper placement plate (main tray) 602, the first auxiliary tray 607, and the auxiliary placement plate 609 in order to explain the attachment relationship. It is a principal part block diagram, FIG.3 (b), (c), (d) is a partial block diagram for demonstrating the attachment structure in each part.

  The paper placing plate 602 is formed with a pair of bosses 602a that are coaxially disposed at both ends near the long side on the side facing the first auxiliary tray 607 to form a rotation shaft portion. FIG. 5B is a partial configuration diagram of the configuration of one rotation support portion 651a configured including the boss 602a as viewed from the plus side of the X axis. As shown in the figure, the boss 602a is rotatably supported by being fitted into bearing portions 606a formed at both ends of the exterior cover portion 606. The other rotation support portion 651b is configured in the same manner, and the sheet placement plate 602 is rotatably held by the exterior cover portion 606.

  In addition, a U-shaped notch 602 b having a predetermined width and depth is formed on the side of the paper stacking plate 602 that faces the first auxiliary tray 607. Note that the rotation position shown in FIG. 3A where the sheet placement plate 602 is stabilized by coming into contact with the exterior cover portion 606, for example, is defined as the reference rotation position of the sheet placement plate 602.

  The first auxiliary tray 607 is formed with a pair of bosses 607a that are coaxially disposed at both ends near the long side facing the paper placement plate 602 and form a rotation shaft portion. FIG. 6C is a partial configuration diagram of the configuration of one rotation support portion 652a including the boss 607a as viewed from the plus side of the X axis. As shown in the figure, the boss 607 a is rotatably supported by being fitted into bearing portions 606 b formed at both ends of the exterior cover portion 606. The other rotation support portion 652b is configured in the same manner, and the first auxiliary tray 607 is rotatably held by the exterior cover portion 606 at a position adjacent to the sheet placing plate 602.

  Further, a U-shaped notch 607c having a predetermined depth at a position substantially opposed to the notch 602b of the first auxiliary tray 602 is provided on the side of the first auxiliary tray 607 facing the paper placing plate 602. Is formed. Note that the first auxiliary tray 607 is further rotated in the D direction around the Y axis by its own weight or the like from the rotation position shown in FIG. 5A which is substantially parallel to the paper placement plate 602 at the reference rotation position. The rotation in the same direction is restricted by restriction means (not shown) so as not to move. The first auxiliary tray 607 at this time is hereinafter referred to as a fully opened state, and the sheet placing plate 602 and the first auxiliary tray 607 are arranged so as to be substantially flush with each other through the boundary portion 615.

  The auxiliary placing plate 609 has a slight gap in a substantially rectangular opening formed by the U-shaped notch 602 b of the paper placing plate 602 and the U-shaped notched portion 607 c of the first auxiliary tray 607. A pair of bosses 609a that are coaxially arranged to form a rotating shaft portion are formed at both ends in the vicinity of the long side on the side facing the first auxiliary tray 607. . FIG. 4D is a partial configuration diagram of the configuration of one rotation support portion 653a including the boss 609a as viewed from the positive side of the Z axis. As shown in the figure, the boss 609a is rotatably supported by being fitted into a bearing portion 607b formed at a position facing the first auxiliary tray 607. The other rotation support portion 653b is similarly configured, and the auxiliary placement plate 609 is rotatably held by the first auxiliary tray 607.

  The auxiliary placing plate 609 is further rotated in the A direction around the Y axis by its own weight or the like from the turning position shown in FIG. 5A which is substantially parallel to the paper placing plate 602 at the reference turning position. In order not to move, for example, a part of the sheet is in contact with the sheet placing plate 602 or the rotation in the same direction is restricted by other restriction means (not shown). The auxiliary mounting plate 609 at this time is hereinafter referred to as a fully opened state.

  As described above, the auxiliary placement plate 609 is disposed so as to block the boundary portion so that a linear gap over the entire boundary portion is not formed at the boundary portion between the paper placement plate 602 and the first auxiliary tray 607. For this reason, when the recording paper 601 (FIG. 2) is stacked on the paper placement plate 602 and the first auxiliary tray 607, the paper itself is prevented from being inadvertently bent such as being caught in the boundary groove.

  As shown in FIG. 3A, the paper placement plate 602 has a convex portion 602c that acts as a guide along the paper transport direction when the auxiliary placement plate 609 is rotated, as will be described later. Is formed. On the other hand, a concave portion 609b is formed on the auxiliary placement plate 609 so as to straddle the convex portion 602c of the paper placement plate 602. When the auxiliary placement plate 609 rotates, the concave portion 609b is convex. It moves along the paper transport direction while being guided by the section 602c. In FIG. 9A, these guide portions are formed at the substantially central portion of the sheet placing plate 602, but can also be formed on both sides. Further, as shown in FIG. 5E, the portions where the paper placement plate 602 and the auxiliary placement plate 609 abut are formed with inclined surfaces, and after the abutment, the auxiliary placement plate 609 smoothly moves to the paper placement plate 602. It is possible to move upward.

  As shown in FIG. 1, an operation panel 710 for operating the image forming apparatus 1000 (FIG. 2) or confirming the situation is disposed above the paper feed tray 600. The lock unit 610 is below the operation panel 710 and holds the paper feed tray 600 in a closed state on the apparatus side as will be described later. Note that when the sheet feeding tray 600 is not used, the sheet feeding tray 600 is locked and closed by the lock unit 610. For example, the recording sheet 101 fed out by one sheet from the sheet feeding unit 200 is a sheet conveying unit. Even when the paper is sent to 300 and a jam occurs, the user can easily remove the jammed paper by opening the paper feed tray 600 as the second paper feed unit and opening the traveling unit.

  FIG. 4 is an explanatory diagram showing a state where the paper feed tray 600 is in the storage position folded to the medium conveyance device 720 main body side and is locked by the lock unit 610. As shown in the figure, in this embodiment, when the paper feed tray 600 is folded and locked in order to make the apparatus compact, the paper feed tray 600 is placed below the operation panel 710 and the lock unit 610. Arranged and considered to be compact. As described above, the exterior cover unit 606 rotates between the storage position shown in FIG. 4 and the operating position where the paper feed tray 600 is loaded with the recording paper 601 (FIG. 2) as shown in FIG. To do.

  FIG. 5A to FIG. 5G are operation diagrams sequentially showing the operation when the sheet feeding tray 600 is stored in the apparatus side. Note that the second auxiliary tray 608 is housed in the lower part of the first auxiliary tray 609 as described above, and the configuration of each drawing is simplified for easier explanation of the operation. Has been.

  FIG. 6A shows a state in which the paper feed tray 600 is loaded with the recording paper 601 (FIG. 2), that is, the paper placement plate (the first auxiliary tray 607 and the auxiliary placement plate 609 are in the reference rotation position). The main tray 602 is shown in a substantially parallel state. Note that the first auxiliary tray 607 and the auxiliary placement plate 609 at this time are fully opened as described above.

  From this state, for example, when the user lifts the first auxiliary tray 607 in the direction of arrow A in order to store the first auxiliary tray 607, the first auxiliary tray 607 forms a rotating shaft as shown in FIGS. The pair of bosses 607a (see FIG. 3) are rotated as fulcrums, and the auxiliary placement plate 609 is pivotally supported by the first auxiliary tray 607 and has a pair of bosses 609a (FIG. 3) as fulcrums. While rotating, it is guided by the convex portion 602c of the paper placing plate 602 and slides on the paper placing plate 602 in the arrow B direction. Eventually, as shown in FIG. 5G, the first auxiliary tray 607 is rotated by approximately 180 degrees, and the auxiliary mounting plate 609 is moved and folded and stored in the exterior cover portion 606. Finally, as shown in FIG. 4, the exterior cover portion 606 that houses the first auxiliary tray 607 and the auxiliary placement plate 609 is further rotated toward the medium conveying device 720 main body side and locked by the lock portion 610. And store.

  In order to reopen the paper feed tray 600 housed in the main body of the image forming apparatus 1000, the lock by the lock unit 610 is released, the exterior cover unit 606 is opened, and the state shown in FIG. Is rotated 180 degrees in the direction opposite to the arrow A, each part moves in the reverse direction from FIG. 4G to FIG. 4A, and the first auxiliary tray 607 and the auxiliary mounting plate 609 are fully opened again. be able to.

  As described above, according to the paper feed tray 600 of the present embodiment, by providing the auxiliary placement plate 609, a linear shape over the entire boundary portion is provided at the boundary portion between the paper placement plate 602 and the first auxiliary tray 607. In order to prevent the gaps from being formed, the boundary portion is cut off, so that the paper is not bent, buckled, damaged, and the like. It is possible to eliminate the inconvenience that the sheet falls from the opening and gets dirty, and the handling of the sheet can be improved. Further, since the first auxiliary tray 607 is arranged so as to be rotatable in conjunction with the operation of the first auxiliary tray 607, the paper feed tray can be folded compactly.

  FIG. 6 is a partial configuration diagram illustrating another modified example of the paper feed tray 600 according to the present embodiment. In this partial configuration diagram, referring to the configuration diagram of the main part of FIG. 3A, the configuration of one rotation support portion 653a including the boss 609a formed on the auxiliary mounting plate 609 is Y. It corresponds to the figure seen from the positive side of the shaft.

  As shown in the figure, a biasing means, for example, a torsion spring 612 is added to the rotation support portion 653a. The torsion spring 612 is arranged so that the boss 609a is fitted in the spiral portion, and one end is hung on a locking pin 609c formed on the auxiliary placement plate 609, and the other end is formed on the first auxiliary tray 607. It is hung on the locking pin 607d. For this reason, in this modification, a groove 607e is formed in the first auxiliary tray 607 as necessary. The torsion spring 612 is attached in a compressed state, and always urges the auxiliary placing plate 609 toward the paper placing plate (main tray) 602 side.

  Therefore, as described above, from the state shown in FIG. 5 (a), the user lifts the first auxiliary tray 607 in the direction of the arrow A so as to store it as shown in FIGS. When it rotates, in this modified example, the auxiliary placement plate 609 is always urged by the torsion spring 612 to press the paper placement plate (main tray) 602 and moves on the paper placement plate 602 in the direction of arrow B. Move to slide.

  As described above, since the auxiliary placement plate 609 is biased toward the medium stacking plate 602, it is possible to stably interlock with the operation of the first auxiliary tray 607. In other words, depending on the handling of the user, it is assumed that the auxiliary placement plate 609 covering the boundary portion is bounced off, and the trouble of the user's medium setting occurs, but the auxiliary placement plate 609 always has a biasing force. As a result, the boundary between the medium stacking plate (main tray) 602 and the first auxiliary tray can be surely covered, and the ease of handling the paper can be further improved.

Embodiment 2. FIG.
FIG. 7A shows an exterior cover 626, a paper placing plate (main tray) 602, a first auxiliary tray 607, and an auxiliary placing plate 629 in the paper feed tray according to the second embodiment of the present invention. It is a principal part block diagram which shows these in a simplified model in order to demonstrate attachment relationship.

  The medium conveying apparatus employing this paper feed tray is mainly different from the medium conveying apparatus 720 of the first embodiment shown in FIG. 1 described above in the method of attaching the auxiliary mounting plate 629 shown in FIG. is there. Accordingly, in the medium transporting apparatus employing this paper feed tray, parts common to the medium transporting apparatus 720 of the first embodiment described above are denoted by the same reference numerals, or the description is omitted by omitting the drawings. Will be explained with emphasis.

  In the paper feed tray of the second embodiment shown in FIG. 7A, the configuration of the rotation support portions 651a and 651b in which the paper placement plate 602 is rotatably held by the exterior cover portion 626, and the first auxiliary Since the configurations of the rotation support portions 652a and 652b in which the tray 607 is rotatably held by the exterior cover portion 626 are exactly the same as those in the first embodiment, description thereof is omitted here. Here, the sheet placing plate (first placing portion) 602 and the exterior cover portion (holding member) 626 correspond to the medium placing base.

  The auxiliary placing plate 629 has a slight gap in a substantially rectangular opening formed by the U-shaped notch 602 b of the paper placing plate 602 and the U-shaped notched portion 607 c of the first auxiliary tray 607. A pair of bosses that are coaxially arranged at the projecting portions 629b formed at both ends in the vicinity of the long side on the side facing the paper placement plate 602 and that forms a rotating shaft portion. 629a is formed.

  FIG. 7B is a partial configuration diagram of the configuration of one rotation support portion 655a including the boss 629a as viewed from the plus side of the X axis. As shown in the figure, the boss 629a is rotatably supported by being fitted into a bearing portion 626c formed at an opposing position of the exterior cover portion 626. The other rotation support portion 655b is similarly configured, and the auxiliary placement plate 629 is rotatably held by the exterior cover portion 626.

  In the vicinity of the long side of the auxiliary placement plate 629 facing the first auxiliary tray 607, a fitting portion 629d is formed on the lower surface of the substantially central portion, and the auxiliary placement plate 626 also has an auxiliary placement as described later. In a state where the plate 629 is rotated approximately 180 degrees in the direction of arrow D around the Y axis and is in contact with the lower surface of the exterior cover portion 626, the plate 629 is fitted into the fitting portion 629d of the auxiliary mounting plate 629 and fixed thereto. A fitting portion 626d is formed for this purpose.

  FIG. 6A shows a state in which the paper feed tray is loaded with recording paper 601 (FIG. 2), that is, a paper placing plate (main main plate) in which the first auxiliary tray 607 and the auxiliary placing plate 629 are at the reference rotation position. The state of being substantially parallel to (tray) 602 is shown. The first auxiliary tray 607 and the auxiliary placement plate 629 at this time are hereinafter referred to as a fully opened state. The first auxiliary tray 607 is formed with a restricting portion 607e for restricting further rotation in the D direction around the Y axis by its own weight when the auxiliary placing plate 629 is in a fully opened state.

  FIG. 8 shows each sheet placement surface when the sheet placement plate (main tray) 602 is in the reference position and the first auxiliary tray 607 and the auxiliary placement plate 629 are in the fully open position in the present embodiment. It is a side view which shows the height relationship.

  As shown in the figure, the placement surface 607 h of the first auxiliary tray 607 is higher than the placement surface 629 h of the auxiliary placement plate 629, and the placement surface 629 h of the auxiliary placement plate 629 is the paper placement plate 602. It is formed higher than the mounting surface 602h. Further, the auxiliary placement plate 629 is formed with a protruding portion 629 i for overlapping the medium placement plate 602.

  FIG. 9A to FIG. 9E are operation diagrams sequentially showing the operation when the sheet feeding tray of the present embodiment is stored in the apparatus side, and FIG. 10A to FIG. 10 (e) is an operation diagram illustrating the states of FIGS. 9 (a) to 9 (e) as viewed from the back side (exterior cover 626 side) of the medium stacking surface. In order to facilitate the explanation of the operation, the configuration of each figure is shown in a simplified manner.

  FIG. 6A shows a state in which the paper feed tray is loaded with recording paper 601 (FIG. 2), that is, a paper placing plate (main main plate) in which the first auxiliary tray 607 and the auxiliary placing plate 629 are at the reference rotation position. It is a figure of the fully open state which is substantially parallel to (tray) 602.

  From this state, the user first removes the auxiliary placement plate 629 from the restriction by the restriction portion 607e of the first auxiliary tray and pushes it down in the direction of the arrow D, as shown in each of FIGS. The restriction portion 607e of the first auxiliary tray is configured to be urged in a protruding direction by the urging means to support the lower surface of the auxiliary mounting plate 629. It is assumed that when it receives a rotational force of a predetermined value or more in the direction of, it retracts and operates to pass the auxiliary mounting plate 629.

  As a result, as shown in FIGS. 7B to 7C, the auxiliary placement plate 629 is supported by the pair of bosses 629a (FIG. 7), which are pivotally supported by the exterior cover 626 and form a rotation shaft. Rotate in the D direction. Thereafter, as shown in FIG. 4D, the fitting portion 629d formed on the auxiliary mounting plate 629 is rotated by approximately 180 degrees and the fitting portion 626d formed on the exterior cover 626 is coupled. Thereafter, the first auxiliary tray 607 is folded in the direction of arrow A and stored as shown in FIG. Finally, as shown in FIG. 4, the exterior cover portion 626 (corresponding to 606 in the figure) that houses the first auxiliary tray 607 and the auxiliary placement plate 629 is further rotated toward the medium conveyance device 720 main body side. It is moved and locked by the lock unit 610 and stored.

  In order to reopen the paper feed tray housed in the main body of the image forming apparatus 1000, the lock by the lock unit 610 is released, the exterior cover unit 626 is opened, and the state shown in FIG. By rotating in the reverse direction to (a), the first auxiliary tray 607 and the auxiliary placement plate 629 can be fully opened again.

  As described above, according to the paper feed tray of the present embodiment, the rotation fulcrum of the auxiliary placement plate 629 is formed on the exterior cover 626, so that the auxiliary placement plate 629 overlaps the medium stacking plate 602. The portion 629i can be formed, and the boundary between the medium stacking plate (main tray) and the first auxiliary tray can be covered more densely. As a result, the gap and the catching portion can be eliminated, so that the paper can be prevented from being bent, buckled, damaged, and the like, and the ease of handling the paper can be further improved.

Embodiment 3 FIG.
FIG. 11A shows an exterior cover 636, a paper placing plate (main tray) 602, a first auxiliary tray 607, and an auxiliary placing sheet 639 in the paper feed tray according to the third embodiment of the present invention. It is a principal part block diagram which shows these in a simplified model in order to demonstrate attachment relationship.

  The medium conveying apparatus that employs this paper feed tray is mainly different from the medium conveying apparatus 720 according to the first embodiment shown in FIG. 1 in that the auxiliary placing sheet 639 shown in FIG. This is a point employed in place of the plate 609 (FIG. 3). Accordingly, in the medium transporting apparatus employing this paper feed tray, parts common to the medium transporting apparatus 720 of the first embodiment described above are denoted by the same reference numerals, or the description is omitted by omitting the drawings. Will be explained with emphasis.

  In the paper feed tray of the third embodiment shown in FIG. 11A, the configuration of the rotation support portions 651a and 651b in which the paper placement plate 602 is rotatably held by the exterior cover portion 636, and the first auxiliary Since the configurations of the rotation support portions 652a and 652b in which the tray 607 is rotatably held by the exterior cover portion 636 are exactly the same as those in the first embodiment, the description thereof is omitted here.

  The auxiliary loading sheet 639 is wound a predetermined number of times with one end fixed to the winding shaft 640, and the other end is fixed to the front end surface 607 f of the first auxiliary tray 607. The winding shaft 640 has bosses 640a formed at both ends thereof.

  FIG. 7B includes the boss 640a, and the configuration of one rotation support portion 656a provided corresponding to the innermost portion of the notch portion 636b of the paper placing plate 602 is the plus of the X axis. It is the partial block diagram seen from the side. As shown in the figure, the boss 640 a is rotatably supported by being fitted into a bearing portion 636 f formed at a position facing the exterior cover portion 636. Further, an unillustrated biasing means (for example, a spring) is interposed between the bearing portion 636f and the winding shaft 640, and the biasing force in the direction of arrow A around the Y axis is generated on the winding shaft 640. . The other rotation support portion 656b is configured in the same manner. Eventually, the take-up shaft 640 is biased in the direction in which the auxiliary placement sheet 639 is wound up, and keeps the auxiliary placement sheet 639 in a tensioned state.

  FIG. 12 is a side view showing the state of each part when the sheet placing plate (main tray) 602 is in the reference position and the first auxiliary tray 607 is in the fully open position in the present embodiment. As described above, the end portion of the auxiliary placement sheet 639 is fixed to the front end surface 607f of the first auxiliary tray 607. The auxiliary placement sheet 639 wound around the take-up shaft 640 that is rotatably supported by the bearing portion 636f formed on the outer cover 636 is made of, for example, a smooth film.

  FIG. 13A to FIG. 13D are operation diagrams illustrating the operation when the sheet feeding tray of the present embodiment is stored in the apparatus side by step. In order to facilitate the explanation of the operation, the configuration of each figure is shown in a simplified manner.

  FIG. 6A shows a state in which the paper feed tray is loaded with recording paper 601 (FIG. 2), for example, the first auxiliary tray 607 is substantially parallel to the paper placing plate (main tray) 602 in the reference rotation position. It is a figure of the fully open state. From this state, for example, when the user lifts the first auxiliary tray 607 in the direction of the arrow A to store the first auxiliary tray 607, the first auxiliary tray 607 has the rotating shaft portion as shown in FIGS. A pair of formed bosses 607a (see FIG. 3) are rotated as fulcrums, and the auxiliary placing sheet 639 is wound around the winding shaft 640 so that the tensioned state is maintained during this time. Eventually, as shown in FIG. 4D, the first auxiliary tray 607 is rotated by approximately 180 degrees, and the auxiliary placing sheet 639 is accommodated in the exterior cover portion 636 while maintaining a tension state. Finally, as shown in FIG. 4, the exterior cover 636 (corresponding to 606 in the figure) that houses the first auxiliary tray 607 and the auxiliary placement sheet 639 is further rotated to the medium conveying device 720 main body side. It is moved and locked by the lock unit 610 and stored.

  In order to reopen the paper feed tray stored in the main body of the image forming apparatus 1000, the lock by the lock unit 610 is released, the exterior cover unit 636 is opened to the state shown in FIG. 13D, and the first auxiliary tray 607 is moved. By rotating 180 degrees in the opposite direction to the arrow A, each part moves in the opposite direction to FIGS. 13D to 13A, and the first auxiliary tray 607 can be fully opened again. During this time, the auxiliary placement sheet 639 is rewound from the take-up shaft 640 while maintaining tension, and reaches the state shown in FIG.

  As described above, according to the sheet feeding tray of the present embodiment, the auxiliary stacking sheet 639 is provided instead of the auxiliary mounting plate, so that, for example, in the first embodiment, the first auxiliary tray 607 and the auxiliary stacking are arranged. It is possible to completely eliminate gaps and steps at the boundary portion formed between the plate 609, and since there are no gaps or catching portions, the paper is prevented from being bent, buckled, damaged, etc. The ease of handling can be further improved.

Embodiment 4 FIG.
FIG. 14A is a configuration diagram showing the configuration of the paper feed tray according to the fourth embodiment based on the present invention, and FIG. 14B is a diagram of the area surrounded by the two-dot chain line in FIG. It is a principal part block diagram.
The paper feed tray 680 is different from the paper feed tray 600 shown in the first embodiment described above in that a paper placing plate (main tray) 662 (602 in the first embodiment) and an auxiliary placing plate 669 (the first embodiment). In FIG. 1, 609) is a part of a part of the opposite shape. Accordingly, in the medium transporting apparatus employing this paper feed tray 680, parts common to those in the image forming apparatus of the first embodiment described above are denoted by the same reference numerals, or the description is omitted by omitting the drawings. Will be explained with emphasis.

  Hereinafter, the exterior cover portion 606, the paper placement plate 602 (662 in this embodiment), the first auxiliary tray 607, and the auxiliary placement plate 609 (669 in this embodiment) described in the first embodiment will be described. This will be described with reference to FIG.

  As shown in FIG. 14 (b), in FIG. 3, there are auxiliary placement plates at a plurality of locations where the paper placement plate 602 (here 662) and the auxiliary placement plate 609 (here 669) face each other. A claw portion 669j formed on the 669 and a claw portion 662j formed on the paper placement plate 662 are formed.

  As shown in the figure, the claw portion 669j and the claw portion 662j are in a state where the paper feed tray 680 stacks the recording paper 601 (FIG. 2), for example, the paper placement plate 662 is at the reference rotation position. 1 When the auxiliary tray 607 and the auxiliary placement plate 669 are fully open (corresponding to the state shown in FIG. 5A), the paper placement plate 662 and the auxiliary placement plate 669 are securely engaged with each other. .

  FIG. 15A shows a state in which, for example, the user lifts the first auxiliary tray 607 in the direction of arrow A to store the first auxiliary tray 607, and the first auxiliary tray 607 is rotated by 90 degrees or more (corresponding to the state shown in FIG. 5E). FIG. 2B shows the state of the claw portion surrounded by the two-dot chain line at this time. At this time, the claw portion 669j and the claw portion 662j are in a separated state. From this state, when the first auxiliary tray 607 is rotated in the direction opposite to the arrow A to fully open the first auxiliary tray 607 and the auxiliary placement plate 669, as shown in FIG. The claw portion 669j of the placement plate 669 moves in the direction of the arrow following the inclined portion of the paper placement plate 662, and the claw portion 669j and the claw portion 662j are engaged again to form the paper placement plate 662 and the auxiliary placement plate 669. And engage securely.

  As described above, according to the paper feed tray of the present embodiment, the claw portion 662j formed on the paper placement plate 662 and the claw portion 669j formed on the auxiliary placement plate 669 engage with each other. Since the mounting plate 662 and the auxiliary mounting plate 669 are combined to function as a reinforcing plate, an increase in rigidity as a tray can be expected, thereby preventing the deflection of the tray. That is, a gap or the like generated by the deflection of the tray can be prevented, and further, the paper can be prevented from being bent, buckled, damaged, and the handling of the paper can be further improved.

Embodiment 5 FIG.
FIG. 16A shows an exterior cover 606, a paper placing plate (main tray) 602, a first auxiliary tray 607, and an auxiliary placing plate 679 in the paper feed tray according to the fifth embodiment of the present invention. It is a principal part block diagram which shows these in a simplified model in order to demonstrate attachment relationship.

  A medium conveying apparatus employing this paper feed tray is mainly different from the medium conveying apparatus 720 of the first embodiment shown in FIG. 1 described above. The auxiliary mounting plate 679 shown in FIG. The roller 643 is attached at the place (two places in the present embodiment). Accordingly, in the medium transporting apparatus employing this paper feed tray, parts common to the medium transporting apparatus 720 of the first embodiment described above are denoted by the same reference numerals, or the description is omitted by omitting the drawings. Will be explained with emphasis.

  FIG. 6B is a configuration diagram of a portion where the roller 643 is disposed as viewed from the plus direction of the Y axis. The roller 643 is rotatably held by a pair of holding arms 679k extending from the auxiliary placement plate 679 across the roller 643, and the recording paper 601 (FIG. 2) is loaded, for example, the paper placement plate 602 is loaded. When the first auxiliary tray 607 and the auxiliary placement plate 679 are fully open (corresponding to the state shown in FIG. 5A) at the reference rotation position, as shown by the dotted line in FIG. It remains at the position of the inclined portion 602k formed at the tip of the mounting plate 602. At this time, it is preferable that the roller 643 is configured not to contact the inclined portion 602k.

  From this state, when the first auxiliary tray 607 takes the respective rotation positions shown in FIGS. 5A to 5G, and the auxiliary placement plate 609 (here, 679) slides on the paper placement plate 602. The rollers 643 smoothly move on the paper placing plate 602 including the inclined portion 602k of the paper placing plate 602.

  As described above, according to the paper feed tray of the present embodiment, the plurality of rollers 643 are rotatably disposed at the front end portion of the auxiliary stacking plate 679 that covers the boundary portion, thereby interlocking with the first auxiliary tray. The operation can be performed more smoothly. Therefore, it can be expected that the user's handling of the tray is further improved. Furthermore, when the auxiliary stacking plate 609 is disposed at a position where the medium can be stacked, the roller 643 is rotatably arranged so that the roller 643 can be placed on the back surface of the sheet when the user sets the sheet. When the sheet is rubbed, the sheet is rotated by the sheet, so that the frictional force is reduced, the sheet is prevented from being bent, buckled, broken, and the like, and the ease of handling the sheet can be further improved.

  In each of the above-described embodiments, the medium conveying device of the present invention has been described as a paper feeding device of a color electrophotographic printer as an image forming device. However, a copying machine, a facsimile, a printer, or the like that forms an image on a recording material. It can also be used as a paper feeding device of an image forming apparatus, and also as a paper discharge tray. Further, it can be used as a paper feeding device and a paper discharge tray of a scanner that reads a medium.

DESCRIPTION OF SYMBOLS 100 Paper feed tray, 101 Recording paper, 102 Paper mounting plate, 102a Support shaft, 104 Lift up lever, 104a Support shaft, 105 Motor, 106 Lift detection part, 200 Paper feed part, 201 Pickup roller, 202 Feed roller, 203 Retard roller, 204 paper presence / absence detection unit, 205 paper remaining amount detection unit, 300 paper conveyance unit, 301 paper sensor, 302 conveyance roller pair, 303 paper sensor, 304 conveyance roller pair, 305 writing sensor, 400 image forming unit, 430 toner Image forming unit, 431 photosensitive drum, 432 charging roller, 433 LED head, 434 developing roller, 435 cleaning blade, 436 toner supply unit, 460 transfer unit, 461 transfer belt, 462 drive roller, 463 tension roller , 464 transfer roller, 465 cleaning blade, 466 toner box, 500 fixing unit, 501 upper roller, 502 lower roller, 503 halogen lamp, 504 discharge roller pair, 505 stacker unit, 600 paper feed tray, 601 recording paper, 602 paper placement Plate, 602a boss, 602b Notch, 602c Convex part, 602h Placement surface, 605 Side guide member, 606 Exterior cover part, 606a, 606b Rotating bearing part, 607 First auxiliary tray, 607a boss, 607b Bearing part 607c Notch part, 607d Locking pin, 607e Restricting part, 607f Tip surface, 607h Mounting surface, 608 Second auxiliary tray, 609 Auxiliary mounting plate, 609a Boss, 609b Recessed part, 609c Locking pin, 610 Part, 612 torsion spring, 615 boundary part, 626 exterior cover part, 626c bearing part, 626d fitting part, 629 auxiliary placing plate, 629a boss, 629b projecting part, 629d fitting part, 629h placing surface, 629i protruding part, 636 exterior cover part, 636f bearing part, 639 auxiliary mounting sheet, 640 winding shaft, 640a boss, 643 roller, 651a, 651b rotation support part, 652a, 652b rotation support part, 653a, 653b rotation support part, 655a, 655b Rotation support unit, 656a, 656b Rotation support unit, 662 Paper placement plate, 662j Claw portion, 669 Auxiliary placement plate, 669j Claw portion, 679 Auxiliary placement plate, 679k Holding arm, 680 Paper feed tray 700 Paper feeding unit, 701 Pickup roller, 702 Feed roller, 703 retard roller, 704 lift-up mechanism, 710 operation panel, 711 support unit, 720 medium transport device, 1000 image forming apparatus.

Claims (10)

A medium transport apparatus having an apparatus main body and a medium placement section that can be at least partially accommodated in the apparatus main body,
The medium placing unit is
A medium mounting base that engages with the apparatus main body and is pivotable with respect to the apparatus main body;
A second placement portion that engages with the medium placement base and can take a first displacement state in which a medium is loaded together with the medium placement base and a second displacement state that overlaps the medium placement base;
An auxiliary member that is disposed at a boundary portion between the medium mounting base and the second mounting portion, has a rotation fulcrum provided on one end side on the medium mounting base, and is rotatably provided. A medium conveying apparatus characterized by the above. The medium mounting base is
A holding member provided in the apparatus main body so as to be pivotable between a storage position and an operating position, and holding the second placement portion displaceably;
A first placement portion that is placed on the holding member so as to be displaceable and engages with the apparatus main body and is capable of displacing the position of the medium. The medium conveying apparatus according to claim 1, wherein the rotation fulcrum of the auxiliary member is rotatably held.   The medium conveying apparatus according to claim 1, further comprising an engaging portion that engages with the second placement portion on the other end side of the auxiliary member. The medium placing base bodies to hold the second mounting portion rotatably, wherein the medium placed between the base member and the second mounting portion, the second mounting portion is said first 4. The medium conveying apparatus according to claim 3, wherein notches are formed at positions facing each other so that an opening having a predetermined shape is formed at the boundary portion when in the displaced state.   5. The medium transporting apparatus according to claim 4, wherein the auxiliary member has a shape enough to fit into the opening having the predetermined shape, and is arranged to be able to fit into the opening having the predetermined shape by turning. Said second support, said first engaged with the engagement portion of the auxiliary member to be fitted into the opening of the predetermined shape in the displacement state, restricts the rotation by its own weight of the auxiliary member The medium conveying device according to claim 5, further comprising a restricting unit that performs the operation. The second placement unit overlaps on one surface of the medium mounting置基body in the second closed state, said auxiliary member, said medium mounting by receiving force exceeding the regulation force by the regulating unit The medium conveying apparatus according to claim 6, wherein the medium conveying apparatus overlaps with the other surface of the mounting substrate. 8. The medium transporting apparatus according to claim 7, further comprising a fixing unit that fixes the auxiliary member at a position overlapping the medium mounting base.   The medium conveying apparatus according to claim 4, wherein the predetermined shape is a square. A medium carrying device according to any one of claims 1 to 9;
An image forming apparatus comprising: an image forming unit that forms an image on a medium loaded on the medium mounting unit.

Images