JP6127002B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus including a table that is mounted on a main body housing and can be pulled out.

  An image forming apparatus that forms an image on a sheet based on optically read image data of an original sheet, image data transferred from an external device, or the like includes an operation panel that receives an operation input from a user. In addition to the operation panel, an optional input device (electric device) such as a keyboard may be added to the main body housing of the image forming apparatus in order to enable more detailed information input. In this case, if an optional device such as a keyboard is permanently installed on the upper surface or side surface of the image forming apparatus, it is assumed that the operability for the user is lowered. In the first place, the image forming apparatus is often not provided with a space where a keyboard can be permanently installed.

  Therefore, when adding a keyboard, it is necessary to attach a table for mounting the keyboard to the main body housing. Moreover, it is desirable that the table can be pulled out and stored with respect to the main body housing so as not to deteriorate the operability for the user. The problem in this case is the handling of the cable that electrically connects the keyboard and the main body housing. In order to be able to pull out the table, the cable must be provided with a surplus length, but there is a concern that the surplus length part may hinder the pulling out operation of the table or be damaged by the drawer.

  Patent Document 1 discloses a keyboard device in which a curl cord is provided with a receiving portion at the bottom of the keyboard. Patent Document 2 discloses a keyboard device in which a keyboard is placed on a desk drawer so that the keyboard can be pulled out from or stored in the desk. However, these prior arts do not specifically teach the cable treatment when the table is slid with the keyboard mounted on the table.

JP-A-6-266787 Japanese Patent Laid-Open No. 9-54631

  The present invention has been made in view of the above points, and connects a main body housing and an electric device when a wired electric device such as a keyboard is mounted on a movable table and mounted on the main body housing. An object of the present invention is to optimize the operation of the cable to be moved when the table is moved.

An image forming apparatus according to an aspect of the present invention is an image forming unit that forms an image on a sheet, a main body housing that includes the image forming unit therein, and a table on which a predetermined electric device is mounted, A table capable of changing a state between a first state housed in the main body housing and a second state drawn from the main body housing; and a cable connecting the main body housing and the electric device; The table includes an extra length accommodating portion that accommodates an extra length portion of the cable, and the extra length accommodating portion includes an extra length of the cable when the table moves from the first state to the second state. A cable length adjusting portion for feeding out a part of the part and returning a part of the extra length part that is fed out when the table moves from the second state to the first state; A fixed pulley that is fixedly disposed in the surplus length accommodating portion and that spans the surplus length portion of the cable, and a movable pulley that is movably disposed in the surplus length accommodating portion and that spans the surplus length portion of the cable. An urging member capable of applying an urging force to the moving pulley, and the moving pulley has a pulling force acting on the cable when a part of the extra length of the cable is extended. the moves in the direction of approaching the fixed pulley, in returning a portion of the surplus portions of said feed and to move in a direction away from the fixed pulley by the biasing force of the biasing member by said body housing The cable includes a first connector, the cable includes a second connector having one end connected to the electrical device and the other end connected to the first connector, A first storage chamber that stores the first portion of the extra length portion of the cable in a loop-like state, and a second portion of the extra length portion that is adjacent to the first storage chamber and is used in the cable length adjusting portion. A second storage chamber, and in the first storage chamber, the first portion of the extra length portion is wound around a bobbin member and is in the loop shape in a state where the feeding and winding are not performed, One end side of the first part leads to the electrical device, the other end side leads to the second storage chamber and continues to one end side of the second part, the other end side of the second part leads to the second connector, A part of the extra length portion of the cable fed out or returned by the cable length adjusting unit is a part of the second portion accommodated in the second accommodation chamber.
In this case, the cable length adjusting unit further includes a pulley guide that rotatably supports the movable pulley and guides the movement of the movable pulley, and the biasing member is engaged with the pulley guide. Is desirable. The cable length adjusting unit further includes a holding unit disposed between the fixed pulley and the moving pulley, the urging member includes a coil spring, and the coil spring includes the pulley guide and the holding unit. The movable pulley and the pulley guide are preferably moved in a direction in which the coil spring is compressed when a part of the extra length of the cable is extended.

  According to this configuration, the table is provided with the cable length adjusting portion, and therefore, when the table moves between the first state and the second state, a part of the cable extra length portion is extended. And return. For this reason, the movement of the table is not hindered by the extra cable length, and the cable is not damaged as the table moves.

  In the above configuration, the main body housing has a box shape, and includes, on one side surface thereof, an opening, and a wall surface that defines an accommodation space that extends to the inner portion of the main body housing. In the first state, at least a part of the table is accommodated in the accommodation space, and the electric device is mounted on the upper surface of the table, and the wall surface covers the upper surface of the table. It is desirable that the upper surface of the electric device is covered with the upper wall surface in the first state.

  According to this configuration, since at least a part of the table is accommodated in the accommodation space in the first state, the operability of the user's image forming apparatus is not hindered when the electrical apparatus is not used. Further, in the first state, the upper part of the electric device is covered with the upper wall surface of the accommodation space, so that it is possible to prevent foreign matters from falling on the electric device or dust from being accumulated.

  In this case, the main body housing has an upper surface and a front surface which is the one side surface and faces the user during normal operation, and the housing space is at or near the intersection of the front surface and the upper surface of the main body housing. It is desirable that the upper wall surface be constituted by a light transmissive board.

  According to this configuration, a user who confronts the entire surface for the operation of the image forming apparatus can visually recognize what electrical device is accommodated in the accommodation space through the light-transmitting board. Therefore, it is possible to improve the usability of the user's electrical equipment.

  In the above configuration, the guide rail is disposed in the housing space and extends along the moving direction of the table between the first state and the second state, and is attached to the table and engages with the guide rail. It is desirable to further include a guided portion.

  According to this configuration, the table can be slid along the guide rail. Therefore, the state change between the first state and the second state of the table can be smoothly performed.

  In the above-described configuration, it is preferable that the surplus length accommodating portion is a concave portion having an opening on a mounting surface of the electric device in the table, and the opening is closed by mounting the electric device on the table.

  According to this configuration, a member for closing the opening of the surplus length accommodating portion can be omitted, and an operation of accommodating the cable in the surplus length accommodating portion is facilitated.

  In the above configuration, the main body housing includes a first connector, the cable includes a second connector having one end connected to the electrical device and the other end connected to the first connector, The cable further includes a loop accommodating portion that accommodates another part of the extra length portion of the cable in a loop-like state, and the part of the cable fed out or returned by the cable length adjusting portion includes the second connector and the cable It is desirable to be between the other part accommodated in the loop accommodating part.

  According to this configuration, since only the necessary length of the extra length portion of the cable is used for the cable length adjustment portion and the other extra length portion can be looped and accommodated in the loop accommodation portion, the cable length adjustment portion is made compact. be able to.

  In the above configuration, it is desirable that the electric device is a keyboard. According to this configuration, the user can input more detailed information to the image forming apparatus through the keyboard.

  According to the present invention, when an electric device such as a keyboard is mounted on a movable table and mounted on a main body housing, the operation of the cable connecting the main body housing and the electric device when the table is moved is optimized. can do. Therefore, the table can be moved smoothly with respect to the main body housing without obstructing the movement of the table by the extra cable length or damaging the cable along with the movement of the table. Can do.

1 is a front view illustrating an appearance of an image forming apparatus according to an embodiment of the present invention. It is a perspective view which shows the upper part of a main body housing. It is a perspective view which shows the table in which the keyboard was mounted. It is a perspective view of the accommodation space of a main body housing, and its peripheral part. It is a perspective view of a support frame. It is a perspective view of the table concerning a 1st embodiment. It is a perspective view of the table concerning a 1st embodiment. It is a perspective view of the table which concerns on 2nd Embodiment. It is a perspective view of the table which concerns on 2nd Embodiment. It is an expansion perspective view which shows the connection part of the connector which concerns on the modification of each embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing an appearance of an image forming apparatus 1 according to an embodiment of the present invention. The image forming apparatus 1 is a copying machine that performs an image forming process for copying an image of an original sheet onto a recording sheet, and includes a main body housing 10 that includes an image forming unit 100 that forms an image, and an upper surface of the main body housing 10. And an automatic document feeder 15 placed on 10T. FIG. 2 is a perspective view showing an upper portion of the main body housing 10, and in FIG. 2, the automatic document feeder 15 is removed.

  The main body housing 10 has a substantially rectangular parallelepiped box shape, and includes a front surface 10F (a side surface of 1), a left surface 10L, a right surface 10R, and a rear surface 10B that face when the user normally operates the image forming apparatus 1. A stepped portion 20 for forming a surface having a lower height than the upper surface 10T is provided at the intersection between the front surface 10F and the upper surface 10T of the main body housing 10. An accommodation space R is formed using the stepped portion 20. A table 30 on which a keyboard 40 (predetermined electrical device) is mounted is attached to the upper portion of the front surface 10F so as to be able to be pulled forward with respect to the main body housing 10. The table 30 is housed in the housing space R when the keyboard 40 is not used (first state), and is pulled forward from the housing space R when the keyboard 40 is used (second state). These will be described in detail later.

  At a position below the front surface 10F of the main body housing 10, a two-stage normal capacity paper feed cassette 11 and a large capacity paper feed cassette 12 are mounted so as to be pulled forward. In the sheet feeding cassettes 11 and 12, sheets on which image forming processing is performed are stored. An upper and lower two-stage paper discharge tray 13 is attached to the left surface 10 </ b> L of the main body housing 10. The sheets after the image forming process are discharged to these paper discharge trays 13.

  A scanner device 14 for optically reading an image on a document sheet is disposed near the upper surface T of the main body housing 10. The scanner device 14 includes a light source that irradiates light on the original sheet, and a carriage 141 (FIG. 2) on which a mirror that guides reflected light from the original sheet to an image sensor (not shown) is mounted. The automatic document feeder 15 automatically conveys the document sheet to a predetermined document reading position. When the document sheet is automatically conveyed by the automatic document conveying device 15, the carriage 141 stops at the home position near the left surface 10L. On the other hand, when the document sheet is manually placed on the upper surface 10T, the carriage 141 moves in the left-right direction.

  The image forming unit 100 transfers the toner image to the sheet by an electrophotographic process. The image forming unit 100 includes a photosensitive drum having a peripheral surface (drum peripheral surface) for holding an electrostatic latent image and a toner image, a charging device for uniformly charging the drum peripheral surface, and irradiating the drum peripheral surface with laser light. An exposure device for forming an electrostatic latent image, a developing device for supplying toner to the peripheral surface of the drum and revealing the electrostatic latent image as a toner image, a transfer roller for transferring the toner image to a sheet, and toner It includes a cleaning device for cleaning the drum peripheral surface after image transfer.

  In addition to the image forming unit 100, the main body housing 10 includes a fixing device, a toner container, a sheet conveyance path, and the like. The fixing device includes a heat roller and a pressure roller, and performs a process of fixing the toner image on the sheet. The toner container supplies toner to the developing device. The sheet conveyance path is a path for conveying a sheet, and conveyance rollers are arranged at appropriate positions. The sheet is conveyed along the sheet conveyance path from the sheet feeding cassettes 11 and 12 to the sheet discharge tray 13 via the image forming unit 100.

  The step portion 20 is formed by a vertical wall 21 extending vertically downward from the front edge of the upper surface 10T of the main body housing 10 and a horizontal wall 22 extending horizontally forward from the lower edge of the vertical wall 21. The height position of the horizontal wall 22 is located below the upper surface 10T by the height of the vertical wall 21. The step portion 20 is formed over the entire width in the left-right direction of the front surface 10 </ b> F of the main body housing 10.

  The left and right end regions of the stepped portion 20 are substantially filled with regions that are stepped by spacer members 23L and 23R, respectively. The spacer members 23L and 23R include a front wall 231 and a top wall 232, and the step portion is such that the front wall 231 is substantially flush with the front surface 10F of the main body housing 10, and the top wall 232 is substantially flush with the top surface 10T. 20 is assembled. A transparent glass board 24 (light-transmitting board; upper wall surface) is bridged over the upper part between the left and right spacer members 23L, 23R. The glass board 24 is a rectangular plate glass that is long in the left-right direction, and its upper surface is substantially flush with the top wall 232 of the spacer members 23L and 23R, its front edge is substantially flush with the front wall 231 and its rear edge is perpendicular to the vertical wall 21. It is close.

  By the vertical wall 21 and the horizontal wall 22 of the stepped portion 20, the left and right spacer members 23L and 23R, and the glass board 24, the front surface 10F of the main body housing is connected to a rectangular opening H that is long in the left-right direction and the opening H. A housing space R extending toward the back (rear) of the main body housing 10 is formed. That is, the upper surface of the horizontal wall 22, the right side wall of the left spacer member 23 </ b> L, the left side wall of the right spacer member 23 </ b> R, and the lower surface of the glass board 24 are wall surfaces that define the accommodation space R. H is formed.

  The table 30 on which the keyboard 40 is mounted is normally in an accommodation state (first state) in which most of the table 30 is accommodated in the accommodation space R. Therefore, in the accommodated state, the operability of the image forming apparatus 1 by the user facing the front surface 10F is not hindered. Further, in the accommodated state, the upper surface of the table 30, that is, the upper side of the keyboard 40 is covered with the glass board 24, so that it is possible to prevent foreign matters from falling on the keyboard 40 or dust from accumulating. Can do. Furthermore, the accommodation space R is disposed in the vicinity of the intersection between the front surface 10F and the upper surface 10T of the main body housing 10, and the upper surface of the accommodation space R is partitioned by a transparent glass board 24. Therefore, the user can visually recognize that the keyboard 40 is accommodated in the accommodation space R through the glass board 24. Therefore, the usability of the user's keyboard 40 can be improved.

  On the other hand, when the user uses the keyboard 40, the table 30 is pulled out from the accommodation space R forward (second state). FIG. 2 shows the pulled out state. In this pulled out state, the table 30 and the keyboard 40 protrude from the opening H forward. Therefore, the user can operate the keyboard 40 without being obstructed by the glass board 24.

  The glass board 24 is located at a lower position than the automatic document feeder 15 and is disposed above the front surface 10F of the main body housing 10. For this reason, the user can use the upper surface of the glass board 24 to perform, for example, a document sheet bundle aligning operation to be read by the automatic document feeder 15.

  FIG. 3 is a perspective view showing a state in which the table 30 on which the keyboard 40 is placed is removed from the main body housing 10. The table 30 generally has a rectangular shape that is long in the left-right direction in a top view, and is a shallow container-shaped extra-length accommodating portion 31 (see FIGS. 6 and 7) with an open upper surface, and the extra-length accommodating portion 31. Guide bars 32 (guided portions) provided on the left and right sides, respectively. The surplus length accommodating portion 31 accommodates a surplus length portion of the cable 50 for electrically connecting the keyboard 40 to a control portion (not shown) and a power supply portion (not shown) in the main body housing 10. The guide bar 32 is a guided portion for causing the table 30 to change the state between the housed state and the pulled-out state by sliding the table 30 in the front-rear direction.

  The keyboard 40 is an optional electrical device that is attached later to the image forming apparatus 1 and includes a board body 41 and a plurality of keys 42 (abbreviated in FIG. 3) arranged on the board. The image forming apparatus 1 includes an operation panel (not shown) that receives an operation input from a user. In addition to the operation panel, the keyboard 40 is added to receive more detailed information input from the user to the image forming apparatus 1.

  4 is a perspective view of the accommodation space R of the main body housing 10 and its peripheral portion, and FIG. 5 is a perspective view of the support frame 70 incorporated in the accommodation space R. As described above, the accommodation space R is a space defined by the vertical wall 21 and the horizontal wall 22 of the stepped portion 20, the left and right spacer members 23 </ b> L and 23 </ b> R, and the glass board 24. Yes. The support frame 70 is a member formed by punching and bending a sheet metal member that is mounted in the accommodation space R in order to realize the sliding movement of the table 30 when the table 30 and the keyboard 40 are added.

  In addition, when the table 30 and the keyboard 40 are not added, the user can utilize the accommodation space R as an arrangement space for various articles and other devices. For example, if the storage space R is used as a space for storing a stapler for binding an original sheet, a remover for removing a binding needle, etc., it is convenient for the user. Alternatively, a card reader or the like that provides use authentication of the image forming apparatus 1 is disposed in the accommodation space R.

  The support frame 70 is composed of a rectangular flat plate that is long in the left-right direction, is horizontally disposed, a rear plate 72 that is vertically erected from the rear edge of the substrate unit 71, and left and right of the substrate unit 71. A side plate 73 erected vertically from each edge, a guide rail 74 formed on the side plate 73 and extending along the direction of sliding movement (front-rear direction), and the vicinity of the front edge of each side plate 73 The guide roller 75 is provided.

  The board portion 71 is a flat plate having a front-rear width substantially equal to the front-rear width of the horizontal wall 22 and a left-right width substantially equal to the left-right spacing between the left and right spacer members 23L, 23R. The rear plate 72 is a flat plate having a height substantially equal to the height of the vertical wall 21. When the support frame 70 is incorporated into the accommodation space R, the lower surface of the substrate portion 71 is in contact with or close to the horizontal wall 22, and the rear surface of the rear plate 72 is in contact with or close to the vertical wall 21. A rectangular window 721 is perforated in the rear plate 72. A main body side connector 25 (first connector) for connecting the keyboard 40 is installed on the vertical wall 21. The connector 25 is a USB connector in this embodiment. The window part 721 is an opening for exposing the main body side connector 25 to the accommodation space R.

  The side plate 73 is a plate material having a height of about half the height of the vertical wall 21. The guide rail 74 includes a pair of upper and lower guide plates, that is, an upper guide plate 741 disposed at the upper edge of the side plate 73 and a lower guide plate 742 disposed near the lower edge. The pair of upper and lower guide plates 741 and 742 are formed by bending portions near the upper and lower edges of the side plate 73 toward the inside of the accommodation space R, respectively, and extend linearly in the front-rear direction. The guide bar 32 of the table 30 is received in the guide space 743 between the upper guide plate 741 and the lower guide plate 742.

  The guide roller 75 is a roller that is disposed in front of the lower guide plate 742 and that freely rotates about a horizontal axis. When the table 30 slides in the front-rear direction, the guide roller 75 comes into contact with the lower surface of the guide bar 32 and rolls to move the table 30 smoothly.

  When the integrated structure of the table 30 and the keyboard 40 shown in FIG. 3 is mounted in the accommodation space R shown in FIG. 4, first, the cable side connector 55 (second connector) attached to the terminal of the cable 50 is used. The main body side connector 25 is connected. The guide bar 32 of the table 30 is assembled to the guide rail 74 by being inserted into the guide space 743 from the front.

  A resin spacer member 33 is attached to the tip of the guide bar 32 so as to cover the outer periphery of the guide bar 32. The spacer member 33 is in sliding contact with the upper guide plate 741, the lower guide plate 742, and the side plate 73 when the table 30 slides. The spacer member 33 is made of a material having excellent slidability, reduces the backlash between the guide rail 74 and the guide bar 32, and suppresses the generation of abnormal noise during the sliding movement.

  Since the structure as described above is provided, the table 30 can be slid in the front-rear direction when the guide bar 32 is guided by the guide rail 74, and between the housed state and the pulled-out state. The state can be changed. Therefore, the user can use the keyboard 40 mounted on the table 30 by pulling it out as necessary. Thus, when the keyboard 40 moves, a problem arises in handling the cable 50 that electrically connects the keyboard 40 and the main body housing 10. In order to enable the table 30 to be pulled out, the cable 50 must be provided with a surplus length. However, there is a concern that the surplus length part may hinder the pulling operation of the table 30 or be damaged by the pulling out. A device for dealing with this problem is applied to the table 30 of the present embodiment. Hereinafter, this point will be described.

  6 is a perspective view of the table 30 according to the first embodiment, and FIG. 7 is a perspective view of the table 30 according to the first embodiment in which the interior of the surplus length accommodating portion 31 is exposed. The cable 50 includes one end 51 connected to the keyboard 40 and the other end 52 connected to the connector 55, and a surplus portion that is in the middle is accommodated in the surplus length accommodating portion 31. The surplus length accommodating portion 31 is provided with a cable length adjusting portion 60 for adjusting the length of the surplus length portion of the cable 50 from the table 30 according to the movement of the table 30.

  The table 30 includes a support surface 30T on which the back surface of the board body 41 of the keyboard 40 is installed. The support surface 30T is a support surface formed in a U shape along the left edge 30L, the front edge 30F, and the right edge 30R of the table 30. The keyboard 40 can be attached to the table 30 by fixing the back surface of the board body 41 with a double-sided tape affixed to the support surface 30T, for example. A rib 301 is provided upright so as to surround the outer periphery of the support surface 30T across the front edge 30F and the front portions of the left edge 30L and the right edge 30R. Since the front edge or the left and right edges of the keyboard 40 abut against the rib 301, the keyboard 40 mounted on the table 30 is prevented from falling from the front or the left and right.

  The surplus length accommodating portion 31 includes a rear wall 302 extending in the left-right direction at the rear edge 30B of the table 30, a left inner wall 303, a right inner wall 304, and a front inner wall 305 of the support surface 30T, and a bottom plate 306 on which these walls stand. And a concave portion that is rectangular in top view and has an open top surface. In addition, since the opening of this recessed part is blocked | closed by mounting to the table of the keyboard 40, it is not necessary to prepare a cover body separately. The surplus length accommodating portion 31 is partitioned into two front and rear accommodation chambers R1 and R2 by a partition wall 307 disposed near the center in the front-rear direction and extending in the left-right direction.

  The rear housing chamber R1 is used as a loop housing portion that houses a part of the extra length of the cable 50 in a loop state. A surplus portion near the one end 51 of the cable 50 is wound around a long cylindrical bobbin member 35 to form a loop-shaped portion 53 (the bobbin member 35 is removed in FIG. 7). The loop-shaped portion 53 is a portion where feeding and winding are not performed, and is placed in the rear storage chamber R1. One end side of the loop-shaped portion 53 of the cable 50 extends from the extra length accommodating portion 31 to the keyboard 40 (one end 51), and the other end side of the loop-shaped portion 53 is a cylindrical boss 308 with a 90-degree wiring direction. It is bent and reaches the front housing chamber R2.

  A cable length adjusting unit 60 is disposed in the front housing chamber R2. A surplus length portion of the cable 50 between the loop-shaped portion 53 (other part of the surplus length portion) and the connector 55 (the other end 52) is accommodated in the front accommodation chamber R2, and is formed by the cable length adjustment portion 60. This is a surplus length adjusting unit 54 to be adjusted. The cable length adjustment unit 60 performs the unwinding and automatic winding of the extra length portion from the table 30, and includes a fixed pulley 61, a moving pulley 62, a pulley guide 63, a coil spring 64, a spring holding unit 65, and a guide slit plate 66. It has. The upper surface of the front housing chamber R2 is covered with the guide slit plate 66 and the cover 34. FIG. 7 shows a state where the guide slit plate 66 and the cover 34 are removed.

  The fixed pulley 61 is a pulley that is rotatable about the axis of the fixed support shaft 61 </ b> S that is erected from the bottom plate 306 of the surplus length accommodating portion 31. The fixed pulley 61 is disposed in the vicinity of the right end of the front housing chamber R <b> 2, and an extra length portion close to the other end 52 of the cable 50 is suspended. The moving pulley 62 is a rotatable pulley that moves in the left-right direction without being supported by a fixed support shaft. The moving pulley 62 is always arranged in the vicinity of the left end of the front housing chamber R2, and moves to the right in response to the table 30 being pulled forward. The surplus length adjusting portion 54 of the cable 50 extends to the left from the cylindrical boss 308, hangs on the moving pulley 62, inverts and extends to the right, and is wired so as to be directed rearward by the fixed pulley 61.

  The pulley guide 63 is a member for rotatably supporting the moving pulley 62 and guiding the movement of the moving pulley 62 in the left-right direction. The pulley guide 63 includes a U-shaped support frame 631 and a guided projection 632 protruding from the upper surface of the support frame 631. The support frame 631 includes a pair of side plates that serve as bearings for the moving pulley 62 and a bottom plate that connects edges of the side plates.

  The coil spring 64 is a member for generating a winding force for automatically winding the drawn-out cable 50, and is disposed in the left-right direction in the front housing chamber R2. The left end 641 of the coil spring 64 is engaged with the bottom plate of the pulley guide 63. FIG. 7 shows a state in which the pulley guide 63 and the moving pulley 62 are pushed to the left most with the coil spring 64 being close to the free length. When the moving pulley 62 moves to the right (FIG. 6), the coil spring 64 is compressed by the pulley guide 63 and generates a biasing force in a direction to return the pulley guide 63 and the moving pulley 62 to the left.

  The spring holding portion 65 is a portion that is disposed between the fixed pulley 61 and the moving pulley 62, supports the right end 642 of the coil spring 64, and positions the coil spring 64 in the front-rear direction. The spring holding portion 65 includes a stopper plate 651 with which the right end 642 of the coil spring 64 abuts, and a pair of holding plates 652 each extending leftward from the front and rear side edges of the stopper plate 651. The distance between the pair of holding plates 652 is slightly longer than the spring outer diameter of the coil spring 64, and the length in the left-right direction is about 1/3 of the spring length of the coil spring 64. A right end 642 of the coil spring 64 is fixedly supported by the stop plate 651, and swinging of the coil spring 64 in the front-rear direction is restricted by the pair of holding plates 652.

  The guide slit plate 66 is a plate member that covers the upper side of the front housing chamber R2 from the front inner wall 305 to the partition wall 307, and includes a slit 66S extending in the left-right direction at a position corresponding to the upper position of the coil spring 64. A guided projection 632 of the pulley guide 63 is fitted into the slit 66S. The pulley guide 63 stably moves in the left-right direction while the guided projection 632 is guided by the slit 66S.

  The operation of the cable length adjustment unit 60 will be described. When the table 30 moves from the housed state (first state) to the pulled out state (second state), the cable length adjusting unit 60 removes a part of the extra length adjusting unit 54 (extra length part) of the cable 50. When the table 30 moves out of the table 30 and moves from the pulled out state to the housed state, a part of the extra length adjusting portion 54 that has been fed out is automatically wound.

  In the state where the table 30 is accommodated in the accommodating space R of the main body housing 10 (first state), the pulling force is not substantially applied to the cable 50. For this reason, the rightward moving force does not act on the moving pulley 62 (FIG. 7). On the other hand, when the table 30 is pulled forward from the accommodation space R (second state), the cable-side connector 55 is connected and fixed to the main body-side connector 25, so that the other end 52 of the cable 50 is connected to the table 30. It is paid out from. At this time, a tensile force acts on the cable 50 between the cable-side connector 55 and the cylindrical boss 308. Due to this pulling force, the moving pulley 62 and the pulley guide 63 move to the right along the slit 66S against the urging force of the coil spring 64 (see FIG. 6).

  On the other hand, when the operation of returning the pulled-out table 30 to the accommodation space R is performed, the pulling force applied to the other end 52 of the cable 50 is loosened. Accordingly, the force with which the pulley guide 63 presses the left end 641 of the coil spring 64 is also weakened, and the pulley guide 63 and the moving pulley 62 supported by the pulley guide 63 are gradually pushed back to the left by the biasing force of the coil spring 64. That is, as soon as slack occurs at the other end 52 of the cable 50, the slack is automatically rewound by the cable length adjusting unit 60.

  As described above, according to the image forming apparatus of the present embodiment, the cable length adjustment unit 60 is provided on the table 30 on which the keyboard 40 is placed when the wired keyboard 40 is added to the main body housing 10. Yes. When the table 30 slides between the housed state and the pulled out state, the cable length adjusting unit 60 performs a part of the extra length adjusting unit 54 of the cable 50 and automatic winding. For this reason, the sliding movement of the table 30 in the front-rear direction is not hindered by the extra length of the cable 50, and the cable 50 is not damaged as the table 30 moves.

  Further, the table 30 can be slid along the guide rail 74. Therefore, it is possible to smoothly change the state of the table 30 between the housed state and the pulled-out state.

  The surplus length accommodating portion 31 that accommodates the surplus length portion of the cable 50 has a shallow box shape and is formed of a recess having an opening on the upper surface on which the keyboard 40 is mounted. This is a configuration that is blocked by mounting on 30. Therefore, there is an advantage that a member for closing the opening of the extra length accommodating portion 31 can be omitted and the operation of accommodating the cable in the extra length accommodating portion 31 is facilitated. Further, only the necessary length (the surplus length adjusting portion 54) of the surplus length portion of the cable 50 is used for the cable length adjusting portion 60, and the other surplus length portion is formed in a loop shape (loop-like portion 53) in the rear housing chamber R1. Since it accommodates, the cable length adjustment part 60 can be reduced in size.

  Next, the table 80 of the second embodiment will be described. FIG. 8 is a perspective view of a table 80 according to the second embodiment, and FIG. 9 is a perspective view of the table 80 according to the second embodiment. In FIG.8 and FIG.9, the same code | symbol is attached | subjected with respect to the element similar to the table 30 demonstrated in relation to 1st Embodiment. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted.

  The table 80 of the second embodiment is formed with a surplus length housing portion 31 for housing the cable 50 of the keyboard 40, similar to the table 30 of the first embodiment. Similarly, the surplus length accommodating portion 31 is partitioned into two front and rear accommodation chambers R1A and R2A by a partition wall 307A disposed near the center in the front-rear direction and extending in the left-right direction. However, in the table 80, the accommodation chambers R1A and R2A are not provided with members such as a bobbin member and fixed and moving pulleys, and are rectangular spaces.

  The rear housing chamber R1A is used as a loop housing portion that houses a part of the extra length of the cable 50 in a looped state. A notch 307Aa is formed at the right end of the partition wall 307A. The cable 50 is housed in a state in which the side close to one end 51 is inserted into the rear housing chamber R1A through the cutout 307Aa and appropriately wound in a loop according to the length. A gap 307Ab is formed between the partition wall 307A and the left inner wall 303 so that the cable 50 can be inserted. The other end 52 side of the cable 50 is inserted into the front storage chamber R2A through the gap 307Ab.

  The front storage chamber R2A communicates with the rear storage chamber R1A through the gap 307Ab. An opening 83 is formed at the right end of the rear wall 302, and the front storage chamber R <b> 2 </ b> A communicates with the storage space R through the opening 83. The cable 50 is housed in a state of being curved forward between the gap 307Ab and the opening 83, the other end 52 side is inserted into the housing space R from the opening 83, and the connector 55 is connected to the main body side connector 25.

  When the table 80 is pulled forward, the cable 50 is fed out from the opening 83 on the other end 52 side as the curved portion in the front housing chamber R2A moves rearward. The space of the front storage chamber R2A is set such that the cable 50 can be sufficiently curved and stored so that the cable 50 can be drawn out by a length corresponding to the drawing distance of the table 80. If the cable 50 has a certain degree of rigidity, when the pulled-out table 80 is stored in the storage space R, the cable 50 drawn out from the opening 83 returns to the front storage chamber R2A and is stored in a curved state again. Therefore, it is not necessary to provide a configuration such as the moving pulley 62 in the cable length adjusting unit 60 as in the first embodiment, and the cost can be reduced.

  Further, a sheet member 84 can be attached to the table 80 so as to cover a part of the opening on the upper surface of the storage chambers R1A and R2A. The sheet member 84 is a rectangular sheet member formed of a transparent resin sheet such as PET. On the two opposite sides of the sheet member 84, engagement protrusions 84a that engage with the slits 302a and 305a formed on the rear wall 302 and the front wall 305 when mounted on the table 80 are formed. In the vicinity of the center between the sides, a rectangular hole 84b that engages with each of the plurality of claw portions 307Ac formed at the upper end of the partition wall 307 is formed. Therefore, in order to mount the sheet member 84 on the table 80, the rectangular hole 84b is engaged with the claw portion 307Ac, and the engagement protrusion 84a is inserted into the slits 302a and 305a by utilizing the flexibility of the sheet member 84. That's fine. Accordingly, it is possible to store the cable 50 in a looped state without providing a bobbin or the like in the rear storage chamber R1A, and store the cable 50 in a curved shape in the front storage chamber R2A. Further, since the sheet member 84 is transparent, it can be easily confirmed whether or not the cable 50 is stored in an appropriate state in the storage chambers R1A and R2A. Therefore, it is possible to facilitate the mounting work of the keyboard 40 on the table 80.

  In addition, slide rollers 85 are rotatably attached to the rear ends of the guide bars 32A respectively provided on the left and right side portions of the table 80. When the table 80 is taken in and out of the storage space R, the slide roller 85 rotates in contact with the upper and lower surfaces of the guide rail 74 and moves the table 80 together with the guide roller 75 smoothly.

  Next, a modification of the connection between the connector 55 of the cable 50 and the main body side connector 25 in each of the above embodiments will be described. FIG. 10 is an enlarged perspective view showing a connector connecting portion according to a modification of each embodiment of the present invention. A rectangular protruding piece 722A bent from the rear plate 72A is formed above the window 721A of the rear plate 72A of the support frame 70A. The protruding piece 722A has two rectangular through holes 723A extending from the bent portion toward the tip. A lock member 90 described below is inserted into the through hole 723A. The lock member 90 is a resin molded member, and includes two plate-like arm portions 90a and a plate-like connecting portion 90b that connects one end sides of the arm portions 90a, and has a U-shaped shape. ing. A plate-like handle portion 90c is formed on the surface of the connecting portion 90b near the center opposite to the arm portion 90a. The through hole 723A of the projecting piece 722A has a shape into which the arm portion 90a of the lock member 90 can be inserted.

  The connector 55 of the cable 50 includes a terminal portion 55a to be inserted into the main body side connector 25 and a holder portion 55b for holding the insertion portion. A flange portion 55c protruding left and right is formed at the end portion of the holder portion 55b on the terminal portion 55a side. Here, after the connector 55 is inserted into the main body side connector 25, the arm portion 90a of the lock member 90 is inserted into the through hole 723A of the protruding piece 722A and attached. Then, when the connector 55 is to be pulled out from the main body side connector 25, the flange portion 55c interferes with the arm portion 90a to be locked. Therefore, there is no risk that the connector 55 is detached from the main body side connector 25 even if a pulling force is applied to the cable 50 when the tables 30 and 80 are pulled out from the storage space R. Further, when the connector 55 is removed from the main body side connector 25, the lock member 90 can be easily removed by holding the handle portion 90c.

  As mentioned above, although each embodiment of the present invention was described, the present invention is not limited to this, and for example, the following modified embodiments can be taken.

  (1) In each of the above embodiments, the keyboard 40 is exemplified as an electric device mounted on the table 30. This is an example, and can be applied to any wired electric device. For example, a card reader unit may be mounted on the table 30.

  (2) In each of the above embodiments, the example in which the accommodation space R of the table 30 is installed at the intersection of the front surface 10F and the upper surface 10T of the main body housing 10 has been described. The arrangement position of the accommodation space R is arbitrary, and the accommodation space R can be provided at an appropriate position on the front surface 10F, the upper surface 10T, the left surface 10L, or the right surface 10R based on the use and preferred arrangement of the electric equipment to be mounted.

  (3) In each of the above-described embodiments, an example in which the accommodation space R of the table 30 is provided and the table 30 is slid in the front-rear direction with respect to the accommodation space R has been described. The accommodation space R is not necessarily provided. For example, the storage space R may be arranged so that the table 30 is simply along the right surface 10R. Further, the accommodation space R may not be a space closed on all four sides, and for example, the assembly of the glass board 24 in the above embodiment may be omitted.

  (4) In the said 1st Embodiment, the mechanism using the fixed pulley 61 and the moving pulley 62 was illustrated as the cable length adjustment part 60. FIG. Instead of this, various automatic wire winding mechanisms can be applied. For example, a spring type winding mechanism may be applied to the cable length adjusting unit 60.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 10 Main body housing 10F Front surface (1 side surface)
100 Image forming unit 21 Vertical wall (wall surface)
22 Horizontal wall (wall surface)
23L, 23R Left and right spacer members (wall surface)
24 Glass board (upper wall / light-transmitting board)
25 Body side connector (first connector)
30, 80 Table 31 Extra length accommodation part 32 Guide bar (guided part)
40 Keyboard (electrical equipment)
50 Cable 53 Loop-shaped part (other part of extra length)
54 Extra length adjustment part (extra length part)
55 Cable side connector (second connector)
60 Cable length adjustment part 70, 70A Support frame 74 Guide rail H Opening part R Storage space R1 Rear storage room (loop storage part)

Claims (4)

An image forming unit for forming an image on a sheet;
A main body housing having the image forming unit therein;
A table for mounting a predetermined electrical device, the table being changeable between a first state housed in the main body housing and a second state drawn from the main body housing;
A cable connecting the main body housing and the electrical device,
The table includes a surplus length accommodating portion for accommodating a surplus length portion of the cable,
In the surplus length accommodating portion, when the table moves from the first state to the second state, a part of the surplus length portion of the cable is extended, and the table is moved from the second state to the first state. A cable length adjusting unit for returning a part of the extra length portion that is extended when moving,
The cable length adjusting part is fixedly arranged in the surplus length accommodating part and the fixed pulley on which the surplus length part of the cable is hung, and is movably arranged in the surplus length accommodating part and the surplus length part of the cable is hung. A movable pulley, and a biasing member capable of imparting a biasing force to the movable pulley,
The moving pulley moves in a direction approaching the fixed pulley by a pulling force acting on the cable when a part of the extra length portion of the cable is drawn out, and returns a part of the extra length portion that has been fed out. When moving in a direction away from the fixed pulley by the biasing force of the biasing member,
The body housing includes a first connector;
The cable includes a second connector having one end connected to the electrical device and the other end connected to the first connector,
The surplus length accommodating portion includes a first accommodating chamber that accommodates the first portion of the surplus length portion of the cable in a loop shape, and the surplus length that is adjacent to the first accommodating chamber and is used in the cable length adjusting portion. A second storage chamber for storing the second part of the part,
In the first storage chamber, the first portion of the extra length portion is wound around the bobbin member so as not to be fed out and wound up, and is in the loop shape.
One end side of the first part leads to the electric device, the other end side reaches the second storage chamber and is connected to one end side of the second part, and the other end side of the second part is connected to the second connector. ,
The image forming apparatus , wherein a part of the extra length portion of the cable fed out or returned by the cable length adjusting unit is a part of the second portion housed in the second housing chamber . The image forming apparatus according to claim 1.
The cable length adjustment unit further includes a pulley guide that rotatably supports the moving pulley and guides the movement of the moving pulley,
The image forming apparatus, wherein the urging member is engaged with the pulley guide. The image forming apparatus according to claim 2.
The cable length adjusting unit further includes a holding unit disposed between the fixed pulley and the moving pulley,
The biasing member comprises a coil spring,
The coil spring is interposed between the pulley guide and the holding portion,
The moving pulley and the pulley guide move in a direction in which the coil spring is compressed when a part of the extra length of the cable is extended. The image forming apparatus according to any one of claims 1 to 3,
The surplus length accommodating portion is composed of a recess having an opening on the mounting surface of the electrical device in the table,
The image forming apparatus, wherein the opening is closed by mounting the electric device on the table.