JP5272988B2 - Housing apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a casing device and an image forming apparatus.

  In general, in a housing device in which a door such as a cover is provided on a housing, a so-called hinge structure is used to open and close the door. For example, Patent Document 1 discloses a method in which a retaining member is provided at a position facing one end of the supporting shaft as a method of fixing the supporting shaft constituting the hinge structure.

JP 2008-93877 A

  An object of the present invention is to suppress separation of a support shaft that supports an openable / closable door from the open / close door using another open / close door.

The housing apparatus according to claim 1 , wherein a housing having a first opening that opens to an external space, and a first opening and closing that opens or closes the first opening to the external space. A first opening / closing door having a second opening that is open to the external space; and a first support that supports the first opening / closing door so as to be openable / closable with respect to the housing. A blocking means for blocking the shaft and the first support shaft from moving from one end side to the other end side of the first support shaft in the first direction and separating from the first opening / closing door; A second opening / closing door that opens or closes the second opening with respect to the external space, and the first support shaft is the first opening regardless of the position of the second opening / closing door. A second opening / closing door having a portion that prevents separation by moving in a second direction opposite to the first direction. When viewed from the second direction, the area of the second door between the end portion and the overlap portion of the one end side, becomes larger towards when opened than when closed the second door It is characterized by that.

The casing device according to claim 2 , wherein the casing has a first opening that opens to an external space, and the first opening and closing that opens or closes the first opening to the external space. A first opening / closing door having a second opening that is open to the external space; and a first support that supports the first opening / closing door so as to be openable / closable with respect to the housing. A blocking means for blocking the shaft and the first support shaft from moving from one end side to the other end side of the first support shaft in the first direction and separating from the first opening / closing door; A second opening / closing door that opens or closes the second opening with respect to the external space, and the first support shaft is the first opening regardless of the position of the second opening / closing door. A second opening / closing door having a portion that prevents separation by moving in a second direction opposite to the first direction. The second door is a portion coming into contact with the edge of the one end side, a second support shaft for openably supporting the second door to the first door is provided An area where the support shaft forming portion covers the end on the one end side when the second opening / closing door is opened as viewed from the second direction. When the opening / closing door is closed, the support shaft forming portion is larger than an area covering the end on the one end side.

The casing device according to claim 3 , wherein the casing has a first opening that opens to an external space, and a first opening / closing that opens or closes the first opening with respect to the external space. A first opening / closing door having a second opening that is open to the external space; and a first support that supports the first opening / closing door so as to be openable / closable with respect to the housing. A blocking means for blocking the shaft and the first support shaft from moving from one end side to the other end side of the first support shaft in the first direction and separating from the first opening / closing door; A second opening / closing door that opens or closes the second opening with respect to the external space, and the first support shaft is the first opening regardless of the position of the second opening / closing door. a second door having a portion for preventing the separation of moving in a second direction which is a direction opposite to the first direction, the second As door to open and close the second opening, comprising a second support shaft for openably supporting the second door to the first door, the said first The opening / closing door 2 has a hole forming portion in which a hole into which the second support shaft is inserted is formed as a portion that contacts the end portion on the one end side, and when viewed from the second direction, The area where the hole forming portion covers the end on the one end side when the second opening / closing door is opened is the end portion on the one end side when the second opening / closing door is closed. It is characterized by being larger than the area covering.

Housing apparatus according to claim 4, wherein, in the housing device according to any one of claims 1 to 3, wherein the edge of the end portion of the one end side is rounded or tapers It is characterized by.

An image forming apparatus according to a fifth aspect includes the casing device according to any one of the first to fourth aspects, and an image forming unit that is accommodated in the casing device and forms an image on a recording medium. The first opening / closing door serves as a means for opening or closing the image forming means to the external space through the first opening, and when the second opening / closing door is opened, A recording medium supplied to the image forming unit through the second opening is a unit on which the recording medium is placed.

According to the housing apparatus according to claim 1-3, wherein that the first supporting shaft that supports the first door openably will be separated from its first door, the second door Can be suppressed.

Further, according to the housing apparatus according to claim 1, wherein the first support shaft when the second door is open even in a situation that tends to separate from the first door, the second opening and closing When the door is opened, the first support shaft can be made more difficult to separate from the first opening / closing door than when the door is closed.

Further, according to according to the housing apparatus of claim 2, wherein, by using the support shaft forming portion posture vary with the opening and closing of the second door, the first support shaft when the second door is open Even if it is easy to separate from the first door, the first support shaft is separated from the first door when the second door is opened, rather than when it is closed. Can be difficult.

Further, according to the housing apparatus according to claim 3, with a hole forming portion posture is changed in accordance with the opening and closing of the second door, the first support shaft when the second door is open Even in a situation where it is easy to separate from the first opening / closing door, the first support shaft is separated from the first opening / closing door when the second opening / closing door is opened, rather than when the second opening / closing door is closed. Can be difficult.

Further, according to claim 4, wherein, according to the housing unit, the edge of the end portion of the one end side of the first support shaft as compared with the case where no or rounded tapers, the first support shaft It is possible to reduce the extent to which the end on one end side obstructs the opening / closing operation of the second opening / closing door.

According to the image forming apparatus according to claim 5, wherein the image forming means first that the opening Lucky or closing the first door for rotatably supporting the outer space through the first opening When the support shaft is separated from the first opening / closing door, a second opening / closing door serving as a means for placing a recording medium supplied to the image forming means through the second opening when the support shaft is opened. Can be suppressed.

1 is a perspective view showing an image forming apparatus using a casing device according to an embodiment of the present invention. 1 is a schematic diagram illustrating a configuration of an image forming apparatus. FIG. 6 is a perspective view illustrating a state in which a manual sheet feeder is opened with respect to a side cover. It is a perspective view which expands and shows the principal part in FIG. It is sectional drawing which shows one 1st support mechanism and 2nd support mechanism. It is sectional drawing seen from the arrow VI-VI direction in FIG. 7A is a cross-sectional view of a state in which the manual paper feed unit is closed, and FIG. 7B is a cross-sectional view of the state in which the manual paper feed unit is opened as viewed from the direction of arrows VII-VII in FIG. It is sectional drawing seen from the same position as FIG. 6 by a modification.

<1. Embodiment>
For example, an image forming apparatus such as a printer or a copier is provided with an open / close cover on the side surface of the housing in order to perform maintenance work such as maintenance and replacement of components, or work to solve problems such as clogging of recording media. . In the following embodiments, such an image forming apparatus will be described as an example. FIG. 1 is a perspective view illustrating an external appearance of an image forming apparatus to which the casing device according to the present embodiment is applied, and FIG. 2 is a diagram schematically illustrating a structure inside the casing of the image forming apparatus.

<Configuration of image forming apparatus>
As shown in FIG. 1, the image forming apparatus 1 is configured by a box-shaped casing device 50, and the right side surface of a casing 51 that forms the base of the casing apparatus 50 opens to an external space. A first opening 52 is formed, and an exterior cover 60 serving as a first opening / closing door that opens or closes the first opening 52 with respect to the external space can be freely opened and closed in the first opening 52. Provided. The exterior cover 60 is formed with a second opening 61 that opens to the external space, and the second opening 61 is provided with a manual paper feeding unit 30 that serves as a second opening / closing door so as to be freely opened and closed. . An image forming mechanism for forming an image is provided in the housing device 50. The exterior cover serves as a means for opening or closing the image forming mechanism to the external space via the first opening 52. In addition, the manual sheet feeding unit 30 is a unit on which a recording sheet serving as a recording medium supplied to the image forming mechanism via the second opening 61 is placed when opened. In FIG. 1, any one surface of the housing device 1 is the front surface of the image forming apparatus 1, and the user performs an operation while viewing the image forming apparatus 1 from this front surface. In the following description, the horizontal direction when the user looks at the image forming apparatus 1 from the front is defined as the X axis, the depth direction as the Y axis, and the height direction as the Z axis.

  Here, an example of the internal configuration and operation of the image forming apparatus 1 will be described with reference to FIG. The image forming apparatus 1 constitutes a tandem type full-color printer, and an image processing apparatus that performs image processing on image data sent from a scanner, a personal computer, a telephone line, or the like (not shown) is included in the image forming apparatus 1. (Not shown) is provided. Inside the image forming apparatus 1, four image forming units (image forming portions) 2Y, 2M, 2C, and 2K of yellow (Y), magenta (M), cyan (C), and black (K) are provided. . The image forming units 2Y, 2M, 2C, and 2K are configured such that the yellow (Y) image forming unit 2Y of the first color is relatively high and the black (K) image forming unit 2K of the final color is relatively low. Further, they are arranged in parallel with an interval that is inclined by a certain angle (for example, 10 degrees) with respect to the horizontal direction. As described above, when the four image forming units 2Y, 2M, 2C, and 2K are arranged in a state inclined by a certain angle, the four image forming units 2Y, 2M, 2C, and 2K are arranged horizontally. In comparison, the distance in the width direction is shortened.

  These four image forming units 2Y, 2M, 2C, and 2K are basically configured in the same manner, and a photosensitive drum 3 as an image holding body that is rotationally driven at a certain speed by a driving unit (not shown). And a developing roller for developing the electrostatic latent image formed on the photosensitive drum 3 by image exposure by an image exposure device 5 described later with a toner, and a charging roll 4 for charging the surface of the photosensitive drum 3. And a cleaning device 7 for cleaning the surface of the photosensitive drum 3. The photoconductor drum 3 is an organic photoconductor formed in a drum shape with a diameter of 30 mm, for example, and having an overcoat layer on the surface thereof, and is rotationally driven by a drive motor (not shown). The charging roll 4 is, for example, a roll-shaped charger in which the surface of a core metal is covered with a conductive layer made of synthetic resin or rubber and having an adjusted electric resistance. A charging bias is applied to the core metal of the charging roll 4. Is used. Further, a cleaning roll 4 a for removing foreign matters such as toner adhering to the surface of the charging roll 4 is disposed on the surface of the charging roll 4.

  An image exposure device 5 is provided below the image forming units 2Y, 2M, 2C, and 2K. The image exposure apparatus 5 includes four semiconductor lasers (all not shown) that emit laser beams modulated in accordance with image data. The four laser beams emitted from these semiconductor lasers are deflected and scanned by a polygon mirror, and are supplied to each of the image forming units 2Y, 2M, 2C, and 2K via lenses and mirrors (none shown). Scanning exposure is performed on the photosensitive drum 3. In this embodiment, the image exposure device 5 is disposed along the lower part of the four image forming units 2Y, 2M, 2C, 2K, and these four image forming units 2Y, 2M, 2C, 2K are horizontal. It is provided in a state inclined with respect to the direction. For this reason, the optical path lengths of the laser beams that are scanned and exposed on the photosensitive drums 3 of the image forming units 2Y, 2M, 2C, and 2K are equal in the image forming units 2Y, 2M, 2C, and 2K.

  Image data of each color is sequentially output from the image processing apparatus to the image exposure apparatus 5 provided in common to the image forming units 2Y, 2M, 2C, and 2K. The laser beam emitted according to the image data from the image exposure device 5 is scanned and exposed on the surface of the corresponding photosensitive drum 3 to form an electrostatic latent image. The electrostatic latent image formed on the photosensitive drum 3 is developed as a toner image of each color by the developing devices 6Y, 6M, 6C, and 6K. The respective color toner images sequentially formed on the photosensitive drums 3 of the image forming units 2Y, 2M, 2C, and 2K are arranged in an inclined state over the image forming units 2Y, 2M, 2C, and 2K. A plurality of images are transferred onto an intermediate transfer belt 10 as an intermediate transfer member by a primary transfer roll 11.

  The intermediate transfer belt 10 is a belt-like member stretched by a plurality of rolls, and the lower side running region of the belt-like member is low on the downstream side along the running direction and high on the upstream side. It is arranged in an inclined state with respect to the horizontal direction. That is, the intermediate transfer belt 10 is wound around the tension roll 12, the drive roll 13, the backup roll 14, the first idler roll 15, and the second idler roll 16 with tension, and has a constant speed. A drive roll 13 that is rotationally driven by a dedicated drive motor (not shown) that is excellent in performance is circulated in the direction of the arrow. As the intermediate transfer belt 10, for example, a flexible synthetic resin film such as polyimide is formed in a band shape, and both ends of the synthetic resin film formed in a band shape are connected by means such as welding, thereby being endless. A belt-shaped one is used. The intermediate transfer belt 10 is disposed so as to be in contact with the photosensitive drums 3Y, 3M, 3C, and 3K of the image forming units 2Y, 2M, 2C, and 2K in the lower side running region.

A secondary transfer roll 17 is disposed at a position facing the drive roll 13 across the intermediate transfer belt 10 so as to come into contact with the surface of the intermediate transfer belt 10 while being in contact therewith. The secondary transfer roll 17 secondarily transfers the toner image primarily transferred onto the intermediate transfer belt 10 onto the recording paper 18. The yellow (Y), magenta (M), cyan (C), and black (K) toner images transferred onto the intermediate transfer belt 10 in a multiple manner are pressed against each other by the secondary transfer roll 17 that is pressed against the drive roll 13. Then, it is secondarily transferred onto a recording paper 18 as a recording medium by electrostatic force. The recording paper 18 to which the toner images of these colors are transferred is conveyed to a fixing device 19 positioned above.
The recording paper 18 onto which the toner images of the respective colors have been transferred is subjected to a fixing process by heat and pressure by a fixing device 19, and is then imaged by a discharge roll 22 through an outlet roll 20 and a paper discharge path 21 of the fixing device 19. The sheet is discharged onto a sheet receiving portion 23 provided on the upper portion of the forming apparatus 1.

  The recording paper 18 is of a predetermined size and material separated from a paper storage unit 24 disposed inside the image forming apparatus 1 by a paper feed roller 25 and a paper separating / conveying roller pair 26 one by one. Are once transported to the resist roll 28 and stopped. The recording paper 18 fed from the paper storage unit 24 is sent to the secondary transfer position of the intermediate transfer belt 10 by a registration roll 28 that is rotationally driven at a predetermined timing.

  Toner cartridges 29Y, 29M, 29C, and 29K are provided between the paper receiving portion 23 and the intermediate transfer belt 10, and the toner cartridges 29Y, 29M, 29C, and 29K are provided with toner in the developing devices 6Y, 6M, 6C, and 6K. Supply. Since the toner cartridge 29K containing black (K) toner is frequently used, the toner cartridge 29K is formed in a larger size than other color toner cartridges.

  Further, a manual paper feed unit 30 is provided on the side surface of the casing device 50, and a recording paper 18 having a specified material and a specified size is supplied from the manual paper feed unit 30 for paper feed roller 31 and paper separation and conveyance. Is conveyed to the registration roll 28 via the roller 32.

<Configuration of casing device>
Next, the structure of the housing device 50 will be described with reference to FIGS. 1, 3 to 7. 3 is a perspective view showing a state in which the manual paper feed unit 30 is opened with respect to the exterior cover 60, FIG. 4 is an enlarged perspective view showing a main part in FIG. 3, and FIG. 6 is a cross-sectional view of the second support mechanism 40, FIG. 6 is a cross-sectional view as seen from the direction of the arrow VI-VI in FIG. 5, FIG. 7A is a state in which the manual paper feed unit 30 is closed, and FIG. FIG. 7 is a cross-sectional view of the state in which the manual sheet feeder 30 is opened as viewed from the direction of arrows VII-VII in FIG. 5.

  As shown in FIG. 1, the exterior cover 60 serves as a first opening / closing door that opens and closes the first opening 52 formed on the right side surface of the casing 51 with respect to the external space. The exterior cover 60 has an opening / closing center at a lower side in FIGS. 1, 3, and 4. Further, the manual sheet feeding unit 30 serves as a second opening / closing door that opens and closes the second opening 61 formed in the exterior cover 60 with respect to the external space. The manual feed unit 30 also has an opening / closing center at a lower side. Each opening / closing center will be described later.

  When a problem occurs in the paper discharge path 21, the registration roll 28, and the recording paper 18 being conveyed, an operator such as a user or a service person performs the work with the first opening 52 opened. For this reason, the exterior cover 60 can be freely opened and closed. On the other hand, the manual paper feed unit 30 is configured to convey the recording paper 18 having a material and size different from that of the recording paper 18 accommodated in the paper accommodation unit 24 to the registration roll 28 as described above. For this reason, the manual sheet feeder 30 can be freely opened and closed. As shown in FIGS. 3 and 4, the exterior cover 60 is supported by the first support mechanisms 70, 70 so that it can be opened and closed, and the manual sheet feeder 30 is supported by the second support mechanisms 40, 40 so that it can be opened and closed. . Each of the first support mechanisms 70 and each of the second support mechanisms 40 is provided at two locations, but since both have the same configuration, only one mechanism will be described and description of the other will be omitted. .

<Configuration of first support mechanism>
As shown in FIGS. 5, 6, etc., the first support mechanism 70 is externally attached to the casing 51 by arranging a support shaft 78 having a flange portion 79 formed at one end thereof along the Y axis. The cover 60 is supported to be freely opened and closed. The support shaft 78 is an example of a first support shaft that supports the exterior cover 60 so as to be openable and closable with respect to the casing 51. Since the support shaft 78 is provided with the flange portion 79, the support shaft 78 moves from the one end side where the flange portion 79 is provided toward the other end side where the flange portion 79 is provided and is separated from the exterior cover 60. It is supposed not to. That is, the flange portion 79 is an example of a blocking unit that prevents the support shaft 78 from being separated from the exterior cover 60. Further, the edge of the flange portion 79 is tapered or rounded. This is to prevent the manual sheet feeding unit 30 from being opened and closed.

  As shown in FIGS. 5 and 6, a first bracket 71 having a through hole 72 is formed on the rear surface side of the exterior cover 60 so as to protrude along the X axis. A through hole 73 (see FIG. 6) is formed in the rib 62 formed by folding the end of the exterior cover 60 so as to be coaxial with the through hole 72. On the other hand, on the housing 51 side, a cylindrical boss 74 whose inside becomes an insertion hole 75 (see FIG. 6) extending along the Y axis is formed across the housing frames 53 and 53. Here, the 1st bracket 71 (through-hole 72) and the rib 62 (through-hole 73) become a 1st support part in the 1st support mechanism 70, and the boss | hub 74 (insertion hole 75) becomes a 1st receiving part. Also, an opening degree restricting portion 54 that restricts the opening degree of the manual sheet feeding portion 30 with respect to the exterior cover 60 is provided along the Y axis when an end portion 41A of the second bracket 41, which will be described later, hits the housing frame 53. It is formed. As shown in FIG. 7 (b), the opening degree restricting portion 54, when the manual paper feeding portion 30 is opened, the end portion 41A of the second bracket 41 abuts and the manual paper feeding portion 30 has an opening angle. regulate.

  When attaching the exterior cover 60 to the housing 51, as shown in FIG. 6, the exterior cover 60 is positioned on the housing 51 so that the boss 74 is inserted between the first bracket 71 and the rib 62, The through holes 72 and 73 and the insertion hole 75 are aligned. Then, the support shaft 78 is inserted in the direction of the arrow A (first direction) along the Y axis from the rib 62 (through hole 73) side with one of the support shafts 78 as the head. Then, the support shaft 78 is positioned in the arrow A direction by inserting until the flange portion 79 formed on the other side of the support shaft 78 abuts against the surface of the rib 62. In the first support mechanism 70, the axis of the support shaft 78 becomes the first axis C <b> 1 and becomes the opening / closing center of the exterior cover 60.

<Configuration of second support mechanism>
The second support mechanism 40 fits the manual sheet feeding unit 30 to the exterior cover 60 by fitting a cylindrical protrusion 42 formed on the manual sheet feeding unit 30 side into the through hole 43 on the exterior cover 60 side. It is supported to open and close freely. As shown in FIG. 5, a trapezoidal second bracket 41 having a protrusion 42 extending along the Y-axis at the tip is provided on the back surface of the manual paper feeding unit 30 (the state in which the manual paper feeding unit 30 is closed). 7 (see FIG. 7) is formed to protrude toward the back side of the casing 51 along the X axis. On the other hand, a through hole 43 is formed in the rib 62 of the exterior cover 60 at a position relatively higher than the through hole 73. Here, the second bracket 41 (protrusion 42) serves as a second support part in the second support mechanism 40, and the through hole 43 serves as a second receiving part.

  When attaching the manual feed unit 30 to the exterior cover 60, as shown in FIG. 5, the projection 42 is inserted into the through hole 43 by being bent inward in the direction of arrow b using the elasticity of the second bracket 41. . By inserting the protrusions 42 into the through holes 43 on both sides of the manual paper feed unit 30, the manual paper feed unit 30 is supported to be openable and closable with respect to the exterior cover 60. That is, the protrusion 42 functions as a support shaft that supports the manual paper feeding unit 30 so as to be openable and closable with respect to the exterior cover 60. In the second support mechanism 40, the axis of the protrusion 42 becomes the second axis C <b> 2, and the manual sheet feeding unit 30 is the opening / closing center. As shown in FIGS. 6 and 7, the second axis C2 extends along the Y axis together with the first axis C1, and is positioned relatively higher than the first axis C1.

<Supporting operation of the support shaft accompanying the opening / closing operation of the manual paper feed unit>
In the housing device 50, the exterior cover 60 is supported by the first support mechanism 70 so as to be openable and closable with respect to the housing 51 by the support shaft 78, and the protrusion 42 of the second support mechanism 40 is inserted into the through hole 43. The manual feed unit 30 is inserted and supported with respect to the exterior cover 60 so as to be opened and closed.
Regardless of the open / closed state of the manual sheet feeding unit 30, the first axis C1 and the second axis C2 are arranged so that the overlapping portion 45 always exists in the flange portion 79 of the support shaft 78 when viewed from the opposite direction of the arrow A. The second bracket 41 has a trapezoidal shape in consideration of the relative distance and the relative position. The second bracket 41 is a support shaft forming portion where a protrusion 42 is formed as a support shaft that supports the manual sheet feeding unit 30. Since this is a trapezoidal shape, when viewed from the axial direction of the support shaft 78, the end portion (flange portion 79) of the support shaft 78 is covered even when the manual paper feeding unit 30 is opened. Even when the paper portion 30 is closed, the end portion (flange portion 79) of the support shaft 78 is covered, and the end portion (flange portion 79) of the support shaft 78 is covered even when the paper portion 30 is placed during the opening / closing operation. ing. The second bracket 41 covers the end portion of the support shaft 78 in this way, so that one end side (the flange portion 79 is provided) from the other end side (the side where the flange portion 79 is not provided) of the support shaft 78. A portion that contacts the end of one end side of the support shaft 78 and prevents the support shaft 78 from being separated from the exterior cover 60 when moving in the direction toward the side) to be separated from the exterior cover 60. Become.

For example, when the exterior cover 60 and the manual feed unit 30 are both closed, the second bracket 41 overlaps with a part of the flange portion 79 of the support shaft 78 as shown in FIGS. A portion 45 is formed. The overlapping portion 45 prevents the support shaft 78 from coming off in the direction opposite to the arrow A (second direction). On the other hand, in a state where the manual paper feeding unit 30 is opened with respect to the exterior cover 60, as shown in FIG. 7B, the second bracket 41 covers the flange portion 79 of the support shaft 78 to form the overlapping portion 45. . The overlapping portion 45 prevents the support shaft 78 from coming off in the direction opposite to the arrow A (see FIG. 6).
In particular, the area of the overlapping portion 45 is larger in the opened state than in the closed state of the manual sheet feeding portion 30. The state that the manual sheet feeding unit 30 is opened is highly likely to be fed, but in such a case, the image forming mechanism performs an operation to form an image, so that slight vibration occurs. To do. This vibration is transmitted to the support shaft 78 so that the position of the support shaft 78 moves and is easily removed from the exterior cover 60. As described above, even if the support shaft 78 is easily separated from the exterior cover 60 when the manual paper feeding unit 30 is open, the support shaft 78 is difficult to separate from the exterior cover 60.

  In the present embodiment, the support shaft 78 is prevented from coming off by using the second bracket 41 that supports the manual paper feed unit 30 that is a necessary part of the image forming apparatus. Space saving compared to a structure that uses a retaining member to prevent the support shaft from coming off, and a structure that separates the retaining member to face the end of the shaft as in the prior art. As a result, assembly workability can be improved. As a result, cost can be reduced.

<2. Modification>
The present invention is not limited to the above embodiment, and may be modified as follows.
<2-1>
In the embodiment described above, the flange portion 79 is formed on the support shaft 78 to prevent the support shaft 78 from coming off in the arrow A direction. However, the present invention is not limited to this, and the support shaft is inserted in the insertion direction (arrow A). Any configuration that prevents slipping off may be used.
For example, as shown in FIG. 8, in the case of the support shaft 78A having only the shaft portion, the retaining member 65 may be formed at a position facing the end portion in the insertion direction (arrow A) in the exterior cover 60. Good. Further, a bottom portion may be formed in the through hole 72 of the first bracket 71 to serve as a retaining portion. In short, any structure that performs positioning in the insertion direction when the support shaft is inserted in the direction of the arrow A may be used.

<2-2>
In the embodiment, the second support mechanism 40 is configured to fit the protrusion 42 into the through-hole 43, but the present invention is not limited to this, and the overlapping portion of the support shaft of the first support mechanism 70 is not limited to this. For example, a support mechanism using a support shaft may be used as in the case of the first support mechanism 70 as long as the structure is supported by the structure.

<2-3>
In the embodiment, the case where the casing device 50 is applied to the image forming apparatus 1 has been exemplified. However, the present invention is not limited thereto, and may be applied to other devices.

<2-4>
In the embodiment, the manual paper feed unit 30 is provided with the second bracket 41 having the protrusion 42 formed as a support shaft for supporting the manual paper feed unit 30, and the through hole 43 is provided on the exterior cover 60 side. . Alternatively, the second bracket 41 may have a bracket portion as a hole forming portion in which a through hole is formed, and a support shaft that is inserted into the through hole may be provided on the exterior cover 60 side. At this time, when the shape of the bracket portion is viewed from the axial direction of the support shaft 78, the end of the support shaft 78 is covered even when the manual paper feed portion 30 is opened, and the manual paper feed portion 30 is covered. The end portion of the support shaft 78 may be covered even when is closed, and the end portion of the support shaft 78 may be covered even when the support shaft 78 is placed during the opening / closing operation.

<2-5>
In the embodiment, the shape of the second bracket 41 is trapezoidal so that the overlapping portion 45 is always present on the flange portion 79 of the support shaft 78, but the overlapping portion 45 is not related to the operation of the manual sheet feeding portion 30. Other shapes such as a rectangle and a triangle may be used as long as they always exist.

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 30 ... Manual feed part (2nd door), 40 ... 2nd support mechanism, 41 ... 2nd bracket (2nd support part), 42 ... Protrusion (2nd support part), 43 DESCRIPTION OF SYMBOLS ... Through-hole (2nd receiving part), 45 ... Overlapping part, 50 ... Housing apparatus, 51 ... Housing, 52 ... 1st opening part, 54 ... Opening restriction part, 60 ... Exterior cover (1st Opening and closing door), 61 ... second opening, 62 ... rib (first support part) (second receiving part), 65 ... retaining member, 70 ... first support mechanism, 71 ... first bracket (first Support part), 72, 73 ... Through hole (first support part), 74 ... Boss (first support part), 75 ... Insertion hole (first support part), 78 ... Support shaft, 79 ... Flange part ( Isobe).

Claims (5)

A housing having a first opening that is open to the external space;
A first opening / closing door that opens or closes the first opening with respect to the external space, and has a second opening that opens to the external space; and
A first support shaft that supports the first opening / closing door so as to be openable / closable with respect to the housing;
Blocking means for preventing the first support shaft from moving from one end side to the other end side of the first support shaft in the first direction and separating from the first opening / closing door;
A second opening / closing door that opens or closes the second opening with respect to the external space, and the first support shaft is the first opening regardless of the position of the second opening / closing door. A second opening / closing door having a portion that prevents separation by moving in a second direction that is the opposite direction of the first direction;
Comprising
When viewed from the second direction, the area of the portion where the second opening / closing door and the end on the one end side overlap is larger when the second opening / closing door is opened than when the second opening / closing door is closed. A casing device characterized by that. A housing having a first opening that is open to the external space;
A first opening / closing door that opens or closes the first opening with respect to the external space, and has a second opening that opens to the external space; and
A first support shaft that supports the first opening / closing door so as to be openable / closable with respect to the housing;
Blocking means for preventing the first support shaft from moving from one end side to the other end side of the first support shaft in the first direction and separating from the first opening / closing door;
A second opening / closing door that opens or closes the second opening with respect to the external space, and the first support shaft is the first opening regardless of the position of the second opening / closing door. A second opening / closing door having a portion that prevents separation by moving in a second direction that is the opposite direction of the first direction;
Comprising
The second opening / closing door is provided with a second support shaft that supports the second opening / closing door so as to be openable / closable with respect to the first opening / closing door as a portion that contacts the end on the one end side. Having a support shaft forming site,
When the second opening / closing door is opened when the second opening / closing door is opened, the area where the support shaft forming portion covers the end on the one end side is closed when the second opening / closing door is closed. The housing device, wherein the support shaft forming portion is larger than an area covering the end portion on the one end side. A housing having a first opening that is open to the external space;
A first opening / closing door that opens or closes the first opening with respect to the external space, and has a second opening that opens to the external space; and
A first support shaft that supports the first opening / closing door so as to be openable / closable with respect to the housing;
Blocking means for preventing the first support shaft from moving from one end side to the other end side of the first support shaft in the first direction and separating from the first opening / closing door;
A second opening / closing door that opens or closes the second opening with respect to the external space, and the first support shaft is the first opening regardless of the position of the second opening / closing door. A second opening / closing door having a portion that prevents separation by moving in a second direction that is the opposite direction of the first direction;
A second support shaft for opening and closing the second opening / closing door with respect to the first opening / closing door so that the second opening / closing door opens and closes the second opening ;
Comprising
The second opening / closing door has a hole forming portion in which a hole into which the second support shaft is inserted is formed as a portion that contacts the end on the one end side,
When viewed from the second direction, the area where the hole forming portion covers the end on the one end side when the second opening / closing door is opened is equal to the area when the second opening / closing door is closed. The housing device, wherein the hole forming portion is larger than an area covering the end portion on the one end side. In the housing device in any one of claims 1 to 3, wherein
An edge of the end on the one end side is tapered or rounded. The housing device according to any one of claims 1 to 4 ,
Image forming means that is housed in the housing device and forms an image on a recording medium,
The first opening / closing door serves as a means for opening or closing the image forming means to the external space through the first opening, and when the second opening / closing door is opened, the first opening / closing door opens the first opening / closing door. An image forming apparatus comprising: a recording medium supplied to the image forming unit through two openings.

Images