JP2009139514A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus which prevents failure caused by interference between wirings electrically connecting a component member and an electric component member, thereby preventing complication of the apparatus, and achieving enhancement of workability such as facilitation of work and shortening of working time. <P>SOLUTION: In the image forming apparatus 100, a first fixing member 76 having a first connection part 76a, which is electrically connected to imaging drive units 23b to 23d through the wiring 27b, is provided on a back side plate 21, and an electric component box fixing member 87 having a second connection part 91a, which is electrically connected to high-voltage substrates 25b to 25d and a power supply substrate 31a through the wiring 27b, is provided in a first electric component box 51. By sliding the electric component box fixing member 87 downward, the first connection part 76a and the second connection part 91a are coupled, the back side plate 21 and the first electric component box 51 are fixed and also the first connection part 76a and the second connection part 91a are electrically connected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image forming apparatus using electrophotography such as a digital copying machine and a laser printer, and more particularly to a method for mounting an image forming drive unit and an electrical board on the apparatus body.

  In a color image forming apparatus using electrophotography, for example, four image forming units are arranged in the image forming apparatus main body corresponding to images of four different colors (cyan, magenta, yellow, and black). Yes. Cyan, magenta, yellow, and black toner images are sequentially formed on each photoconductor provided in these image forming units by respective charging, exposure, and development processes, and an intermediate transfer belt or a conveyance belt is used as each photoconductor. The toner images formed on the surface of the photoreceptor are sequentially transferred.

  Each toner image is primarily transferred onto the intermediate transfer belt and then secondarily transferred onto the transported paper, or directly transferred onto the transported paper on the transport belt, and then made into a permanent image by a fixing process. The

  In such an image forming apparatus, particularly a high-speed machine or a large-sized machine, as shown in FIG. 11, image forming portions Pa to Pd are disposed between the front side plate 20 and the back side plate 21 of the image forming apparatus 100. The image forming drive units 23a and 23b are connected to the opposite sides of the image forming portions Pa to Pd of the back side plate 21 to the respective end portions of the image forming portions Pa to Pd with the back side plate 21 interposed therebetween. 23c and 23d, and high-voltage boards 25a, 25b, 25c, and 25d that supply driving power to the image forming drive units 23a to 23d are provided on the rear side of the image forming drive units 23a to 23d. ing.

  Further, a plurality of electrical boards 31 (here, a power supply board 31a and a control board 31b) having various electric circuits necessary for image formation are provided on the back side of the high-voltage boards 25a to 25d, and openings are provided on the back side. An electrical box 33 made of a flat box-like member is disposed so as to be openable and closable with the left side surface portion of the back side plate 21 as one side fulcrum. Two first hinge portions 34 project inward along the vertical direction of the left side surface portion of the back side plate 21, and the second hinge connected to the first hinge portion 34 is provided on the left side surface portion of the electrical equipment box 33. The part 35 protrudes outward.

  As shown in FIG. 12, the first hinge portion 34 has two pins 34a projecting upward along the vertical direction, and the second hinge portion 35 is engageable with the pin 34a. A hole 35a is provided. When the engagement hole 35a engages with the pin 34a, the first hinge part 34 and the second hinge part 35 are connected, and the electrical box 33 can be opened and closed as shown in FIG. It has become.

  14 shows a side view of FIG. 11 viewed from the left side, FIG. 15 shows the arrangement order of the members shown in FIG. 14, FIG. 16 shows the arrangement state of the wiring 27b, FIG. 17 shows a top view of FIG. 16. As shown in FIG. 14, the high-voltage boards 25 a to 25 d and the electrical box 33 are arranged from the back side plate 21 toward the back side of the apparatus main body (right side in the figure). These are arranged in order, and these are attached in the order of the high-voltage boards 25a to 25d and the electrical equipment box 33 as shown by arrows in FIG.

  Further, as shown in FIG. 15, the high voltage boards 25a to 25d are provided with connectors 27a and wirings 27b (thick lines), and the connectors 27a are connected to the image forming drive units 23 to 23d. As shown in FIG. 17, the wiring 27 b is connected to the power supply substrate 31 a and the control substrate 31 b through the window portion 28 provided on the side surface of the electrical equipment box 33. The power supply board 31a is connected to a power outlet 29 (see FIG. 11).

  When checking or replacing components such as the image forming drive units 23a to 23d in regular inspection and repair after shipment, the electrical box 33 is first opened and then connected to the high voltage boards 25a to 25d. After the connecting member 27 such as the connector 27a and the wiring 27b are removed and then the high-voltage boards 25a to 25d are further removed, the image forming drive units 23a to 23d can be accessed.

  As described above, in order to access the image forming drive units 23a to 23d, it is necessary to sequentially open or remove from the electrical equipment box 33 arranged on the back side, and in this case, it is necessary to remove the wiring 27b, and the work becomes complicated. Therefore, the work time becomes longer, or when the removed connector or wiring is reattached, there is a possibility that the apparatus main body may be damaged if it is mistakenly connected.

Therefore, a method for facilitating access to such a component has been proposed. For example, in Patent Document 1, all of the main body electric board and the optional electric board to be mounted on the apparatus main body are housed in a single metal casing to be mounted on the apparatus main body separately from the apparatus main body, Disclosed is a method for improving the maintainability of an electrical board by easily accessing the electrical board in the housing by using an image forming apparatus including an optional device having a function equivalent to a personal computer in a metal housing. .
JP 2004-249633 A

  However, in the method of Patent Document 1, the opening / closing lock of the housing is performed by a fixing screw, and after opening the housing, it is necessary to disconnect the component from the inside of the apparatus main body. For this reason, the operation becomes complicated and the operation time becomes longer, or when the removed connector or wiring is reattached, there is a possibility that the apparatus main body may be damaged if it is mistakenly connected.

  In addition, when the components inside the apparatus main body and the electrical board are connected by wiring, there is a possibility that malfunction due to interference between a plurality of wirings or generation of electromagnetic noise may occur. In addition, there is a possibility that disconnection may occur, and a member configuration and an arrangement configuration for avoiding disconnection are required, which may complicate the apparatus and may increase costs. Furthermore, in maintenance or the like that is performed regularly or irregularly, there is a risk that the above-described deterioration in workability, erroneous connection, or wiring failure may occur.

  In view of the above problems, the present invention prevents the occurrence of problems due to interference between wirings that electrically connect components and electrical components, making the apparatus more complex, facilitating work, shortening work time, etc. An object of the present invention is to provide an image forming apparatus capable of improving workability.

  In order to achieve the above object, according to the present invention, in an image forming apparatus that forms an image by operating a constituent member, the constituent member supporting member provided with the constituent member is electrically connected to the constituent member. An electrical board, an electrical board support member on which the electrical board is disposed, a first fixing means disposed on the structural member support member and electrically connected to the structural member, and the electrical board support member And a second fixing means that is electrically connected to the electrical board and connectable to the first fixing means, and one of the first and second fixing means is configured as described above. The member supporting member or the electric circuit board supporting member is supported so as to be movable to a position where it is connected to the other and a position where the connection is released, and the first and second fixing means are connected, thereby Member support member and front With the electrical component mounted circuit board support member is fixed, and the first fixing means and the second fixing means is characterized in that it is electrically connected.

  Further, in the present invention, one end of the electrical board support member is pivotally supported on the apparatus main body so as to be openable and closable, and the first and second fixing means open and close to lock and unlock the electrical board support member. It functions as a lock mechanism.

  Further, the present invention is characterized in that the second fixing means is slidably supported by the electrical board support member at a position where the second fixing means is connected to the first fixing means and a position where the connection is released. .

  According to the present invention, the second fixing means includes a second engaging means that is engageable with a first engaging portion provided on the component member supporting member when the second fixing means is connected to the first fixing means. An engaging portion is provided.

  Further, the present invention is characterized in that the second fixing means is provided with a handle portion for moving the fixing means.

  Further, the present invention covers the electrical circuit board support member, and is provided with a cover member whose one end is pivotally supported by the apparatus main body so as to be openable and closable, and the second fixing means and the cover member include the cover member. A cover member opening / closing lock mechanism for locking the opening / closing is provided.

  In the invention, it is preferable that the constituent member is an image forming unit.

  According to the first configuration of the present invention, in the image forming apparatus that forms an image by operating the constituent member, the constituent member supporting member is provided with the first fixing means electrically connected to the constituent member. An electrical board support member provided with an electrical board that is electrically connected to the member is provided with a second fixing means that is electrically connected to the electrical board and can be coupled to the first fixing means, and One of the second fixing means is movably supported by the support member, and the first and second connection members are moved separately from the support member and connected to each other, whereby the component member support member and the electrical board support member are connected. And the first connection portion and the second connection portion are electrically connected.

  Thereby, only by connecting the first fixing means and the second fixing means, it is possible to fix the constituent member and the electrical board support member and to electrically connect the constituent member and the electrical board. Therefore, it is possible to shorten the wiring that electrically connects the component member and the electrical component member, prevent interference between the wirings, and prevent a problem due to the interference. Further, since it is possible to avoid complication of wiring arrangement and connection, it is possible to prevent complication of the apparatus and improve workability such as facilitating work and shortening work time.

  According to the second configuration of the present invention, in the image forming apparatus having the first configuration, one end of the electrical board support member is pivotally supported on the apparatus main body so as to be openable and closable, and the first and second fixing means are It was decided to function as an open / close lock mechanism that locks and unlocks the open / close of the electrical board support member. Accordingly, the electrical connection and removal, and the opening / closing lock and unlocking of the electrical board support member can be performed only by connecting and disconnecting the first fixing means and the second fixing means.

  Therefore, if the opening / closing of the electrical board support member is not locked, the component member and the electrical board are not electrically connected, and the electrical board support member can be prevented from being opened while both are electrically connected. . In addition, since the electrical board support member cannot be opened unless the electrical connection is released, it is safer.

  According to the third configuration of the present invention, in the image forming apparatus having the first or second configuration, the second fixing means is connected to or disconnected from the first fixing means with respect to the electrical board support member. By slidably supporting the position, it is possible to electrically connect the component member and the electrical board simply by sliding the second fixing means. Therefore, the first fixing means and the first fixing means can be easily connected with a simple configuration. 2 fixing means can be connected.

  According to the fourth configuration of the present invention, in the image forming apparatus having any one of the first to third configurations, the first engagement portion provided in the component member support member is provided in the second fixing unit. By providing the second engagement portion that engages with the first and second fixing means, it is possible to prevent the connected first and second fixing means from rattling and to connect the first fixing means and the second fixing means more reliably and stably. Can do.

  According to the fifth configuration of the present invention, in the image forming apparatus having any one of the first to fourth configurations, the second fixing means can be easily moved by providing the second fixing means. Can be made.

  According to the sixth configuration of the present invention, in the image forming apparatus having any one of the first to fifth configurations, the electrical substrate support member is covered, and one end of the image forming apparatus is pivotally supported so as to be openable and closable with the apparatus main body. The cover member is provided, and the second fixing means and the cover member are provided with a cover member opening / closing lock mechanism that locks the opening and closing of the cover member when the second fixing means is connected to the first fixing means. As a result, it is possible to cover the electrical board support member only after the component member and the electrical board are reliably electrically connected, so that malfunction due to poor connection can be prevented.

  Further, according to the seventh configuration of the present invention, in the image forming apparatus having the first to sixth configurations, the image forming unit is used as an image forming unit to perform image formation that prevents further malfunctions and malfunctions. Can do.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing an image forming apparatus as an example of the present invention. In the main body of the image forming apparatus 100, four image forming portions Pa, Pb, Pc, and Pd are sequentially arranged from the upstream side in the transport direction (the right side in FIG. 1). These image forming portions Pa to Pd are provided corresponding to images of four different colors (magenta, cyan, yellow, and black), and magenta, cyan, and yellow are respectively subjected to charging, exposure, development, and transfer processes. And a black image is formed sequentially.

  Photosensitive drums 1a, 1b, 1c, and 1d that carry visible images (toner images) of the respective colors are disposed in the image forming portions Pa to Pd, and are formed on the photosensitive drums 1a to 1d. The toner images thus formed are sequentially transferred onto the paper P conveyed by the conveying belt 50 that moves adjacent to each image forming unit while rotating counterclockwise (arrow direction) in FIG. 1 by a driving means (not shown). After being transferred and further fixed on the paper P in the fixing unit 7, it is discharged from the apparatus main body. An image forming process for each of the photosensitive drums 1a to 1d is executed while rotating the photosensitive drums 1a to 1d clockwise in FIG.

  The paper P on which the toner image is transferred is housed in a paper cassette 16 at the lower part of the apparatus, and the image forming units Pa to Pd are passed through the paper feed roller 12a, paper feed roller pairs 12b and 12c, and registration roller pair 12d. It is conveyed to. A sheet made of dielectric resin is used for the conveyance belt 50, and a belt in which the flange portions are overlapped and joined to each other to form an endless shape, or a belt without a seam (seamless) is used. A cleaning blade 19 for removing toner adhering to the conveyance belt 50 is disposed on the upstream side of the driven roller 10.

  Next, the image forming units Pa to Pd will be described. Chargers 2a, 2b, 2c and 2d for charging the photosensitive drums 1a to 1d and image information on the photosensitive drums 1a to 1d are arranged around and above the rotatable photosensitive drums 1a to 1d. LED heads 4a to 4d for individually exposing, developing units 3a, 3b, 3c and 3d for forming toner images on the photosensitive drums 1a to 1d, and developer (toner) remaining on the photosensitive drums 1a to 1d. Cleaning portions 5a, 5b, 5c and 5d are provided.

  When the start of image formation is input by the user, first, the surfaces of the photosensitive drums 1a to 1d are uniformly charged by the chargers 2a to 2d, and then light is irradiated by the LED heads 4a to 4d. An electrostatic latent image corresponding to the image signal is formed on ˜1d. Each of the developing units 3a to 3d includes a developing roller (developer carrying member) disposed so as to face the photosensitive drums 1a to 1d, and each of magenta, cyan, yellow, and black toners is supplied by a replenishing device (not shown). A predetermined amount is filled. This toner is supplied onto the photosensitive drums 1a to 1d by the developing rollers of the developing units 3a to 3d, and electrostatically adheres to the electrostatic latent images formed by exposure from the LED heads 4a to 4d. A corresponding toner image is formed.

  After an electric field is applied to the conveyor belt 50 at a predetermined transfer voltage, the magenta, cyan, yellow, and black toner images on the photosensitive drums 1a to 1d are conveyed to the conveyor belt 50 by the transfer rollers 6a to 6d. Is transferred onto the sheet P. These four color images are formed with a predetermined positional relationship predetermined for forming a predetermined full-color image. Thereafter, the toner remaining on the surfaces of the photosensitive drums 1a to 1d is removed by the cleaning units 5a to 5d in preparation for the subsequent formation of a new electrostatic latent image.

  The conveyance belt 50 is stretched over the driven roller 10 and the drive roller 11. When the conveyance belt 50 starts to rotate counterclockwise with the rotation of the drive roller 11 by a drive motor (not shown), the paper P is loaded. The images are conveyed from the registration roller pair 12d to the image forming portions Pa to Pd at a predetermined timing, and the images are sequentially transferred onto the paper P at the nip portion with the conveying belt in each image forming portion, thereby forming a full color image. The paper P on which the toner image is transferred is conveyed to the fixing unit 7.

  The sheet P conveyed to the fixing unit 7 is heated and pressurized when passing through the nip portion (fixing nip portion) of the pair of fixing rollers 13 to fix the toner image on the surface of the sheet P, and a predetermined full-color image is formed. It is formed. The paper P on which the full color image is formed is discharged to the discharge tray 17 by the discharge roller 15.

  FIG. 2 is a perspective view of the electrical equipment box used in the image forming apparatus according to the present embodiment as seen from the back side of the apparatus main body, and FIG. 3 shows the connection state of the wiring of the back side plate and the electrical equipment box in FIG. FIG. 4 is a plan view in which the display of wiring is omitted in FIG. 5 (a) is a partial plan view showing an engagement portion between the first electrical box and the second electrical box, and FIG. 5 (b) is a partial side view as seen from the left side of FIG. 5 (a). FIG. Portions common to FIGS. 1 and 11 to 16 are denoted by common reference numerals, and description thereof is omitted.

  As shown in FIGS. 2 and 3, the electrical box 50 (electrical board support member) is a flat rectangular box opening on the back side of the apparatus main body (the front side in the figure), and is a first electrical box disposed on the upper side. 51 and the 2nd electrical equipment box 52 arrange | positioned below. High voltage boards 25a to 25d are disposed on the bottom surface portion 51a of the first electrical equipment box 51, and a power supply board 31a and a control board 31b are disposed on the bottom surface section 52a of the second electrical equipment box 52, A power outlet 29 is connected to the power board 31a.

  In addition, an electrical box fixing member (second fixing means) 87 that can be connected to a first fixing member (first fixing means) 76 provided on the back side plate 21 is provided at the upper right of the first electrical equipment box 51. Yes. The connection of the wiring 27b between the first fixing member 76, the electrical box fixing member 87, the image forming units 23a to 23d, the high voltage boards 25a to 25d, the power supply board 31a and the control board 31b will be described later.

  The upper side surface portion 51b of the first electrical equipment box 51 is arranged at a predetermined distance from the upper side surface portion 21a of the back side plate 21 and substantially parallel to the upper side surface portion 21a. It protrudes upward. The engagement protrusion 55 is formed at a position and a length capable of being engaged with an engagement groove 61 provided on the back side plate 21 described later.

  Further, as shown in FIGS. 4 and 5, on the left and right sides of the lower side surface portion 51d of the first electrical equipment box 51, one end portion is located at substantially the same position as the bottom surface portion 51a along the bottom surface portion 51a. The sliding member 57 is arranged so that the opposite end 57b protrudes from the opening end of the first electrical equipment box 51 to the back side (the right side in FIG. 5B). As shown in FIG. 5A, the sliding member 57 is substantially U-shaped in cross section, and both ends of the U-shape are bent inward, and can be slid by engaging with a guide member 59 described later. It has become.

  On the other hand, a second hinge part 35 having an engagement hole 35 a that can be engaged with the pin 34 a of the first hinge part 34 of the rear side plate 21 is disposed on the left side surface part 52 c of the second electrical component box 52. Further, a guide member having a substantially T-shaped cross section that engages with and slideably supports the sliding member 57 of the first electrical component box 51 on the upper surface of the upper side surface portion 52b of the second electrical component box 52. 59 is disposed (see FIGS. 4 and 5A). In the guide member 59, the end portion 59a on the back side plate 21 side projects in the direction perpendicular to the bottom surface portion 52a of the second electrical equipment box 52 from the bottom surface portion 52a to the back side plate 21 side (left side in FIG. 5B). The opposite end 59b is disposed at substantially the same position as the open end of the second electrical equipment box 52.

  6 and 7, which will be described later, the guide member 59 is a second fixing member of the electrical box fixing member 87 described later when the sliding member 57 slides toward the end 59a side of the guide member 59. 91 is disposed at a position where it can face and connect to the first fixing member 76 of the back side plate 21, and when the second fixing member 91 slides toward the end 59 b side, the second fixing member 91 does not face the first fixing member 76 and is connected. It is formed so that it can be placed at a position where it cannot. At this time, as described above, since the end portion 59a of the guide member 59 protrudes from the second electrical component box 52, the first electrical component box 51 is provided even when the distance between the rear side plate 21 and the second electrical component box 52 is wide. The second fixing member 91 can be guided to a position where the second fixing member 91 can be opposed to and connected to the first fixing member 76.

  Further, since the end portion 57 b of the sliding member 57 protrudes from the first electrical component box 51, the length from the bottom surface portion 51 a of the first electrical component box 51 to the open end is the bottom surface portion 52 a of the second electrical component box 52. Even if it is shorter than the length from the opening end to the opening end, the contact area between the sliding member 57 and the guide member 59 can be increased, and the sliding and engagement can be made stable. As described above, the sliding member 57 is slidably supported by the guide member 59, so that the first electrical box 51 can be opened and closed along with the second electrical box 52.

  Further, as shown in FIG. 4, the engagement groove cut out from the opening end side along the sliding direction of the first electrical equipment box 51 on the first hinge portion 34 side of the upper side surface portion 21 a of the rear side plate 21. 61 is formed. When the sliding member 57 of the first electrical equipment box 51 slides to the end 59a side of the guide member 59, the engaging groove 55 is fitted into the engaging groove 61 (see FIG. 6), and the engaging groove 61 slides to the end 59b side. When moved, the engagement protrusion 55 is formed so as to be disengaged from the engagement groove 61 (see FIG. 7).

  Also, as shown in FIG. 4, an electrical box fixing member 87 is disposed on the upper side surface 51b of the first electrical equipment box 51. As will be described later, the first electrical equipment box 51 and the rear side plate 21 are connected to each other. In addition to fixing, the second connection portion 91a of the electrical box fixing member 87 can be electrically connected to the first connection portion 76a of the first fixing member 76 (see FIG. 8).

  Next, the opening / closing operation | movement of the electrical equipment box 50 of this invention is demonstrated based on FIG. 6, FIG. Fig.6 (a) is a partial side view which shows the state with which the 1st electrical equipment box and the back side board are engaged, FIG.6 (b) is the top view which looked at Fig.6 (a) from the upper direction. is there. Moreover, Fig.7 (a) is a partial side view which shows the state by which engagement with the 1st electrical equipment box and the back side plate was cancelled | released, FIG.7 (b) looked at Fig.7 (a) from the upper direction. It is a top view. Portions common to FIGS. 1 to 5 are denoted by common reference numerals, and description thereof is omitted. In FIGS. 6 and 7, the display of the wiring 27b is omitted.

  First, the operation of opening the electrical box 50 will be described. It is assumed that the fixing of the electrical box fixing member 87 and the back side plate 21 is released. 6A and 6B, when the electrical box 50 is closed, the sliding member 57 of the first electrical box 51 is on the end 59a side of the guide member 59 of the second electrical box 52. (First position, left side of the figure), the engagement protrusion 55 and the engagement groove 61 are engaged, and the opening and closing of the electrical box 50 is locked. Further, as described above, the second fixing member 91 of the electrical box fixing member 87 is disposed at a position where it can be connected to the first fixing member 76 of the rear side plate 21.

  From this state, when the inner surface of the first electrical equipment box 51 is grasped and pulled in the direction of the white arrow in the figure, the sliding member 57 moves from the end 59a of the guide member 59 of the second electrical equipment box 52 to the end 59b side (first 2), the second fixing member 91 of the electrical box fixing member 87 is disposed at a position where it cannot be connected to the first fixing member of the rear side plate 21, and the engagement protrusion 55 of the first electrical box 51 is arranged. Can be detached from the engagement groove 61 of the back side plate 21.

  Thereby, as shown to Fig.7 (a) and FIG.7 (b), engagement with the 1st electrical equipment box 51 and the back side board 21 is cancelled | released. And if the 1st electrical equipment box 51 or the 2nd electrical equipment box 52 is rotated to the apparatus back side, it will be accompanied with each other and the 1st electrical equipment box 51 and the 2nd electrical equipment box 52 can be opened (unlocked).

  Next, an operation for closing the electrical box 50 will be described. When the first electrical equipment box 51 and the second electrical equipment box 52 are turned to the back side plate 21 side from the state where the first electrical equipment box 51 and the second electrical equipment box 52 are opened as described above (FIG. 7A and FIG. 7 (b)), the engagement protrusion 55 of the first electrical equipment box 51 is disposed at a position facing the opening of the engagement groove 61 of the rear side plate 21.

  In this state, when the first electrical component box 51 is pushed in the direction of the white arrow in FIGS. 7A and 7B, the sliding member 57 of the first electrical component box 51 becomes the guide member 59 of the second electrical component box 52. Is slid toward the end 59a. As a result, as shown in FIGS. 6A and 6B, the engagement protrusion 55 and the engagement groove 61 are engaged, and the connector 27a is connected to the image forming drive units 23a to 23d. Thereafter, the first electrical component box 51 can be fixed to the rear side plate 21 by the electrical component box fixing member 87.

  Next, a method of fixing the electrical equipment box 50 and the back side plate 21 by the electrical equipment box fixing member 87 will be described. As shown in FIG. 4, the first electrical equipment box 51 is provided with the electrical equipment box fixing member 87 described above. After the first electrical equipment box 51 and the second electrical equipment box 52 are closed, One electrical box 51 is fixed to the back side plate 21. Fig. 8 (a) shows the electrical box fixing when the first electrical box is fixed to the back side plate in Fig. 8 (b) when the fixing to the back side plate of the first electrical box is released by the electrical box fixing member. The expansion perspective view of a member periphery is shown. As shown in FIG. 8A and FIG. 8B, the first electrical component box 51 is formed of a bent rectangular plate-like member on the right side surface portion 51 e side at the upper end portion of the bottom surface portion 51 a (see FIG. 4). An electrical box fixing member 87 is provided.

  The electrical box fixing member 87 is provided with a support portion 87a provided along the bottom surface portion 51a (see FIG. 4) of the first electrical device box 51, and protrudes substantially horizontally from the upper end of the support portion 87a toward the rear side plate 21 side. The fixed portion 87b, and a substantially L-shaped hook portion (second portion) that is erected upward from the end on the back side plate 21 side of the fixed portion 87b substantially vertically and has a tip projecting toward the back side plate 21 side. Engaging portion) 87c.

  A handle (handle portion) 88 projects from the lower end portion of the support portion 87a toward the side opposite to the back side plate 21, and the back side plate 21 extends along the vertical direction above the left end of the handle 88. A guide groove 89 is provided that engages with the guide protrusion 75 provided on the upper surface of the housing and holds the electrical box fixing member 87 and guides the movement in the vertical direction. Further, a cutout hole engageable with a protruding piece (cover member locking mechanism) 98a (see FIG. 9) provided on a back cover 98 (cover member, see FIG. 9), which will be described later, on the upper end side of the support portion 87a. (Cover member lock mechanism) 90 is provided.

  Further, a second fixing member 91 is disposed along the width direction at the end of the fixing portion 87b on the hooking portion 87c side. The 2nd fixing member 91 is comprised from the 2nd connection part 91a provided in the width direction center part, and the screw | thread 91b provided in the both ends. In addition, projecting pieces 93 that can be fitted in through holes (first engagement portions) 77 provided in the back side plate 21 are provided on the lower surfaces of both ends in the width direction of the front end portion of the hook portion 87c. Moreover, the wiring 27b from the high voltage units 25b to 25d and the wiring 27b from the power supply substrate 31a are connected to the second connection portion 91a (see FIGS. 2 and 3).

  On the other hand, when the first electrical equipment box 51 is slid toward the back side plate 21 (see FIG. 6), the second fixing member 91 is connected to the back side plate 21 at a position facing the first fixing member 91 from below. A first fixing member 76 is provided. The first fixing member 76 includes a first connecting portion 76a into which the second connecting portion 91a of the second fixing member 91 is fitted, and a screw hole 76b to which the screw 91b is fixed. A wiring 27b from the image forming drive units 23b to 23d is electrically connected to the first connecting portion 76a (see FIG. 3).

  Thus, as described above, the first electrical box 51 and the second electrical box 52 are closed (see FIG. 6), and the engagement protrusion 55 of the first electrical box 51 is engaged with the engagement groove 61 of the back side plate 21. Thereafter, when the handle 88 is grasped and the electrical box fixing member 87 is lowered, the protruding piece 93 of the hook portion 87c is fitted into the through hole 77 of the rear side plate 21 and the second connecting portion 91a of the fixing portion 87b is the first connecting portion. The second connecting portion 91a and the first connecting portion 76a are electrically connected to each other by fitting with 76a. Further, the first electrical component box 51 is fixed to the back side plate 21.

  Thereafter, by fixing the screw 91b of the fixing portion 87b to the screw hole 76b, the first electrical equipment box 51 can be fixed more reliably. Note that the first connecting portion 76a and the second connecting portion 91a may be connected, and the screw 91b and the screw hole 76b are not essential. Further, fixing members other than the screws 91b and the screw holes 76a may be used as appropriate.

  The image forming unit 23a, the high voltage unit 25a, and the control board 31b are electrically connected by a wiring 27b that penetrates the window portion 28. The wiring 27b is not energized unless the first connecting portion 76a of the first fixing member 76 and the second connecting portion 91a of the electrical box fixing member 87 are electrically connected. Further, the wiring 27b can be opened and closed together with the first electrical equipment box 51 and the second electrical equipment box 52, and does not need to be connected and disconnected when the electrical equipment box 50 is opened and closed.

  Here, the wiring 27b between the image forming unit 23a and the high-voltage board 27a and the control board 31b is connected without the electrical box fixing member 87 and the first fixing member 76, but the image forming units 23a to 23d and the electrical board are connected. The electrical connection can be made only by the connection of the electrical box fixing member 87 and the first fixing member 76, or other connection methods can be used in combination, and is not particularly limited. In addition, the method used in combination is that the back side plate 21 and at least one electrical board disposed on the electrical box 51 can be electrically connected by the electrical box fixing member 87, and the back side plate 21 and the electrical box 51 are electrically connected. Is not particularly limited as long as it can be fixed. The connector 27a shown in FIGS. 14 and 15 can be used in combination.

  FIG. 9 is a diagram showing an engaged state between the back cover and the first electrical equipment box, and FIG. 9A is a partial perspective view showing a state in which the back cover is opened, and FIG. FIG. 5 is a perspective view showing a state in which a back cover is closed. Portions common to FIGS. 2 to 8 are denoted by common reference numerals and description thereof is omitted.

  The back cover 98 is formed of a flat box-like member having openings on the first electrical equipment box 51 and the second electrical equipment box 52 side, and is rotatably connected to the left side surface portion of the back side plate 21. The back cover 98 is formed so as to cover the openings of the first electrical equipment box 51 and the second electrical equipment box 52 when the back cover 98 is closed. Further, a projecting piece 98 a fitted into the cutout hole 90 is provided at a position facing the cutout hole 90 of the support portion 87 a of the electrical box fixing member 87 on the upper side surface portion of the back cover 98.

  Thereby, after fixing the 1st electrical equipment box 51 to the back side board 21 as mentioned above, if the 1st protrusion piece 98a and the cutout hole 90 are engaged, the back cover 98 can be closed. Note that the back cover 98 and the back side plate 21 are connected to each other by a hinge portion having a pin on one side and an engagement hole on the other side, as in the connection method between the back side plate 21 and the second electrical box 52 described above. The method of providing and connecting can be used. The opening / closing direction of the back cover 98 is the same as that of the first electrical box 51 and the second electrical box 52 here, but the opening / closing direction is not particularly limited. It can also be opened and closed by providing a pivot point.

  As described above, the image forming drive units 23b to 23d are electrically connected to the first connecting portion 76a of the first fixing member 76 by the wiring 27b, and the electrical box 50 (the first electrical box 51 and the second electrical box 52). Are electrically connected to the second connecting portion 91a of the second fixing member 91 of the electrical box fixing member 87 by the wiring 27b, thereby securing the electrical box. By simply sliding the member 87 downward and connecting to the first fixing member 76, the rear side plate 21 and the electrical box 50 are fixed, the image forming drive units 23b to 23d, the high voltage boards 25b to 25d, and the power source The substrate 31a can be electrically connected.

  Therefore, the wiring 27b can be shortened, interference between the wirings 27b can be prevented, and malfunctions and electromagnetic noise caused by the interference can be prevented. In addition, disconnection can be prevented, a member configuration and an arrangement configuration for avoiding disconnection are not required, the apparatus can be prevented from being complicated, and cost increase can be suppressed. In addition, workability can be improved by facilitating work and shortening work time. Moreover, in the maintenance etc. which are performed regularly or irregularly, it is possible to prevent the above-described deterioration of workability, erroneous connection, and wiring failure, which is safe.

  In the above-described embodiment, the first electrical component box 51 and the second electrical component box 52 can be opened and closed with one side fulcrum, and the electrical component box fixing member 87 and the first fixing member 76 are fixed and released from the first electrical component. Since the opening and closing of the box 51 and the second electrical equipment box 52 are locked and unlocked, the image forming units 23b to 23d and the electrical equipment board can be electrically connected and detached by simply moving the electrical equipment box fixing member 87 up and down. .

  As a result, the image forming units 23b to 23d and the electrical component are not electrically connected unless the first electrical component box 51 and the second electrical component box 52 are released, and the first electrical component is connected in a state where both are coupled. It is possible to prevent the box 51 and the second electrical equipment box 52 from being opened. In addition, since the first electrical equipment box 51 and the second electrical equipment box 52 cannot be opened unless the electrical connection is removed, it is safer.

  However, the open / close lock method is not particularly limited to the present embodiment, and can be appropriately set such as separately screwing. Moreover, the engagement protrusion 55 provided in the 1st electrical equipment box 51 as mentioned above and the engagement groove | channel 61 provided in the back side board 21 can also be used. In this embodiment, in addition to the open / close lock using the electrical box fixing member 87, the open / close lock using the engagement protrusion 55 is used to double lock.

  Thus, after the electrical connection is released by releasing the connection of the electrical box fixing member 87, the first electrical box 51 and the second electrical box 52 may be opened unless the first electrical box 51 is slid to the back side. Since this is not possible, the first electrical equipment box 51 and the second electrical equipment box 52 can be opened after the electrical connection has been removed more reliably, which further increases safety. In addition, arrangement | positioning of the engagement protrusion 55 and the engagement groove | channel 61 is not limited to the said embodiment, It can set suitably.

  Further, in this embodiment, the electrical box fixing member 87 is slidably supported on the first electrical equipment box 51 at a position where it is connected to and disconnected from the first fixing member 76 of the rear side plate 21. By simply sliding the member 87 up and down from the back side, the first electrical equipment box 51 and the back side plate 21 can be easily fixed and released, the electrical connection between the image forming units 23b to 23d and the electrical board, and Removal is possible. Therefore, the second fixing member of the electrical box fixing member 87 and the first fixing member of the rear side plate 21 can be connected and disconnected easily with a simple configuration.

  However, the method of fixing the first electrical equipment box 51 and the back side plate 21 is not particularly limited to the present embodiment, and an electrical box fixing member 87 is provided on the back side plate 21 in accordance with the device configuration. It is also possible to provide the second fixing member 76 in the box 51. Also, the moving method of the electrical box fixing member 87 is not particularly limited to sliding, and can be set as appropriate according to the apparatus configuration and the like.

  Moreover, in this embodiment, since the hook part 93 which engages with the through-hole 77 provided in the back side plate 21 was provided in the electrical box fixing member 87, the first fixing member 76 of the back side plate 21 and the electrical box fixing When the second fixing member 91 of the member 87 is connected, it is possible to prevent such rattling and to connect the electrical box fixing member 87 and the first fixing member more reliably with a simple configuration. Moreover, since it can prevent that both remove | deviate, a connection becomes stable.

  However, the engaging method of both is not particularly limited to this embodiment, and can be set as appropriate. For example, the hook portion 93 is provided on the back side plate, and the through hole 77 is provided in the electrical box fixing member 87. You can also In this embodiment, since the handle 88 is provided on the electrical box fixing member 87, the electrical box fixing member 87 can be easily slid. However, the arrangement position, shape, quantity, and the like of the handle 88 are not particularly limited to the present embodiment, and can be appropriately set according to the apparatus configuration and the like.

  Further, in the present embodiment, the first electrical component box 51 and the second electrical component box 52 can be opened and closed in the same direction, and a back cover 98 that covers these electrical components box is provided, and the electrical component box fixing member 87 is provided on the rear cover 98. Since the cutout hole 90 that can be engaged with the projected piece 98a is provided, the electrical board support member can be covered only after the image forming drive units 23b to 23d are securely electrically connected with a simple configuration. It is possible to prevent malfunction due to poor connection. However, the open / close lock mechanism of the back cover is not particularly limited to this embodiment.

  Moreover, although the electrical equipment box 50 was comprised from the 1st electrical equipment box 51 and the 2nd electrical equipment box 52 here, the electrical equipment box 50 can also be comprised from three or more electrical equipment boxes. In addition, here, by sliding the first electrical component box 51, only the vicinity of the electrical component box fixing member 87 can be brought close to the rear side plate 21, but such a configuration depends on the device configuration and the like. It can be set appropriately. For example, one electrical box 50 can be provided, and the high-voltage boards 25a to 25d, the power supply board 31a, and the control board 31b can be disposed thereon.

  In the above embodiment, since the image forming units 23b to 23d and the first fixing member 76 are electrically connected by the wiring 27b, an image in which malfunctions and problems caused by the arrangement of the wiring 27b, wiring defects, and the like are prevented. It becomes possible to form. However, the constituent member electrically connected to the first fixing member 76 is not particularly limited as long as it is used for image formation. Further, the electrical board electrically connected to the electrical box fixing member 87 is not particularly limited to that used in the above embodiment. The constituent members according to the present invention include an electrical board on which an electric circuit is formed.

  The arrangement of the wiring 27b shown in the above embodiment is merely an example. The image forming drive unit 23a is used as the first connecting portion 76a of the first fixing member 76, and the high-voltage board 25a and the control board 32b are used for the second fixing. It can also be electrically connected to the second connection portion 91a of the member 91, and can be set as appropriate according to other device configurations.

  FIG. 10 is a perspective view of another electrical equipment box used in the image forming apparatus according to the present embodiment as viewed from the back side of the apparatus main body. Portions common to FIGS. 2 to 8 are denoted by common reference numerals and description thereof is omitted. High voltage units 25a to 25d, a power supply board 31a, and a control board 31b are disposed in the electrical box 50 that is pivotally supported by the back side plate 21 so as to be openable and closable.

  The image forming units 23b to 23d are electrically connected to the first connecting portion 76a of the first fixing member 76 by the wiring 27b, and the high voltage boards 25b to 25d and the power supply board 31a are connected to the electrical box fixing member 87 by the wiring 27b. The second connection portion 91a is electrically connected. Then, the electrical box 50 is closed, the electrical box fixing member 87 is lowered, and the second fixing member 91 is connected to the first fixing member 76 of the back side plate 21, thereby fixing the electrical box 50 to the back side plate 21. At the same time, the image forming drive units 23b to 23d, the high voltage units 25b to 25d, and the power supply substrate 31a can be electrically connected. Moreover, the opening / closing of the electrical box 50 can be locked.

  On the other hand, when the electrical box 50 is opened, the electrical box 50 and the back side plate 21 are fixed by lifting the electrical box fixing member 87 and releasing the connection between the second fixing member 91 and the first fixing member 76. In addition, the electrical connection between the image forming drive units 23b to 23d, the high voltage units 25b to 25d, and the power supply board 31a can be released and removed. Further, the open / close lock of the electrical box 50 can be released.

  As a result, the connection / disconnection of the electrical box fixing member 87 and the first fixing member 76 is performed to lock the opening / closing of the electrical box 50, and the electrical connection between the image forming units 23b to 23d and the electrical board is performed. Connection and disconnection can be performed. In addition, since the configuration such as providing the back cover 98 is the same as that of the above embodiment, the description thereof is omitted.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, one electrical box fixing member 87 is provided on the upper surface of the first electrical box 51 and the electrical box 50, but it can be provided on the right side and the upper and lower sides, and the number thereof is two. It can also be provided.

  Moreover, in the said embodiment, although the 1st electrical equipment box 51, the 2nd electrical equipment box 52, and the electrical equipment box 50 were able to be opened and closed horizontally using the apparatus back surface left side as a rotation fulcrum, this rotation fulcrum is especially limited. However, it may be provided on the right side of the back of the apparatus, or may be provided on the upper side or the lower side so that it can be opened and closed in the vertical direction. In addition, when opening and closing can be performed in the vertical direction, it is possible to improve workability by using a support member or the like as appropriate in the opened state, and supporting these electrical boxes so that they are not opened or closed. .

  In addition, as the image forming apparatus of the present invention, only the direct transfer type tandem type image forming apparatus is shown here, but in addition, the intermediate transfer type tandem type image forming apparatus, the monochrome image forming apparatus, the copying machine, the printer, etc. The present invention can also be applied to other types of image forming apparatuses.

  The present invention provides an image forming apparatus for forming an image by operating a component member, a component member support member provided with the component member, an electrical board electrically connected to the component member, and the electrical component An electrical board support member on which a board is disposed; a first fixing means disposed on the component member support member and electrically connected to the component member; and disposed on the electrical board support member. And a second fixing means electrically connected to the substrate and connectable to the first fixing means, wherein one of the first and second fixing means is the component member support member or the electrical board. The supporting member is movably supported between a position where it is connected to the other side and a position where it is released from the other, and the first and second fixing means are connected to each other so that the component member supporting member and the electrical board are connected. Support member is fixed While being, the first fixing means and the second fastening means is intended to be electrically connected.

  Thereby, only by connecting the first fixing means and the second fixing means, it is possible to fix the constituent member and the electrical board support member and to electrically connect the constituent member and the electrical board. Accordingly, it is possible to prevent interference between the wirings that electrically connect the component member and the electrical component member, and it is possible to prevent problems due to such interference. Further, since it is possible to avoid complication of wiring arrangement and connection, it is possible to prevent complication of the apparatus and improve workability such as facilitating work and shortening work time.

  In addition, the one end of the electrical board support member is pivotally supported on the apparatus main body so as to be openable and closable, and the first and second fixing means function as an open / close lock mechanism that locks and unlocks the electrical board support member. By simply connecting and disconnecting the first fixing means and the second fixing means, it is possible to electrically connect and disconnect, and to open / close lock and unlock the electrical board support member, which is safe.

  In addition, the second fixing means is slidably supported on the electrical board support member at a position where it is connected to and disconnected from the first fixing means, so that only the second fixing means is slid and the component member and the electrical equipment are slid. Since electrical connection with the substrate becomes possible, the first fixing means and the second fixing means can be easily coupled with a simple configuration.

  Further, by providing the second fixing means with the second engaging portion that engages with the first engaging portion provided on the component member supporting member, it is possible to prevent rattling of the connected first and second fixing means. In addition, the first fixing means and the second fixing means can be coupled more reliably and stably. Moreover, the second fixing means can be easily moved by providing a handle portion on the second fixing means.

  In addition, a cover member is provided to cover the electrical board support member, one end of which is pivotally supported by the apparatus main body so as to be opened and closed, and the second fixing means and the cover member are coupled to the first fixing means. By providing a cover member opening / closing lock mechanism that locks the opening / closing of the cover member, the electrical board support member can be covered only after the component member and the electrical board are securely electrically connected. Malfunctions can be prevented. Further, by forming the constituent member as an image forming unit, it is possible to perform image formation in which malfunctions and problems due to wiring arrangement and wiring failure are prevented.

FIG. 1 is a schematic diagram illustrating an overall configuration of an image forming apparatus that is an example of the present invention. These are the top views seen from the apparatus main body back side which shows the electrical equipment box used for the image forming apparatus of this embodiment. These are top views which show the arrangement | positioning state of the wiring in a back side board and an electrical equipment box. These are the figures which abbreviate | omitted the display of the wiring in FIG. These are figures which show the engaging part of the 1st electrical equipment box and the 2nd electrical equipment box, Comprising: Fig.5 (a) is a partial top view, FIG.5 (b) is the left side of Fig.5 (a). It is the partial side view seen from. These are figures which show the state which the 1st electrical equipment box and the back side board are engaging, Comprising: Fig.6 (a) is a partial side view, FIG.6 (b) shows FIG.6 (a). It is the top view seen from the upper part. These are figures which show the state by which engagement with the 1st electrical equipment box and the back side plate was cancelled | released, Comprising: Fig.7 (a) is a partial side view, FIG.7 (b) is FIG.7 (a). It is the top view which looked at from the upper part. These are figures which show the fixing method with respect to the back side plate of a 1st electrical equipment box, FIG.8 (a) is a perspective view which shows the state by which fixation of the 1st electrical equipment box was cancelled | released, FIG.8 (b) It is a perspective view which shows the state by which the 1st electrical equipment box was fixed. These are figures which show a back cover, FIG. 9 (a) is a perspective view which shows the state which opened the back cover, FIG.9 (b) is a perspective view which shows the state which closed the back cover. These are the perspective views seen from the apparatus main body back side which shows the other electrical equipment box used for the image forming apparatus of this embodiment. These are perspective views showing the periphery of an image forming drive unit, a high-voltage board, and an electrical box disposed on the back side of a conventional image forming apparatus. These are top views which show the connection state of an electrical equipment box and a back side board. These are perspective views which show the state which the electrical equipment box opened. These are side views which show the arrangement | positioning state of an image formation drive unit, a high voltage | pressure board | substrate, and an electrical equipment box. These are side views which show the arrangement | positioning order of an image formation drive unit, a high voltage | pressure board | substrate, and an electrical equipment box. These are perspective views which show the wiring state of an image formation drive unit, a high voltage board, and an electrical equipment box. These are top views which show the wiring state of an image formation drive unit, a high voltage | pressure board | substrate, and an electrical equipment box.

Explanation of symbols

1a to 1d Photosensitive drums 3a to 3d Developing unit 20 Front side plate 21 Back side plate 23a to 23d Image forming drive unit (component)
25a to 25d High-voltage board (electrical board)
27b Wiring 31a Power supply board (electrical board)
31b Control board (electrical board)
33 Electrical box 34 First hinge part 35 Second hinge part 50 Electrical box (electrical board support member)
51 First Electricity Box 52 Second Electricity Box 55 Engaging Protrusion 57 Sliding Member 59 Guide Member 61 Engaging Groove 76 First Fixing Member (First Fixing Means)
76a 1st connection part 77 Through-hole (1st engaging part)
87 Electrical box fixing member (second fixing means)
88 Toride (handle part)
90 Cutout hole (Cover member open / close lock mechanism)
91 2nd fixing member 91a 2nd connection part 93 hook part (2nd engagement part)
98 Back cover 98a Protruding piece (cover member opening / closing lock mechanism)
100 Image forming apparatus Pa to Pd Image forming unit

Claims (7)

In an image forming apparatus that forms an image by operating a constituent member,
A component support member in which the component is disposed;
An electrical board electrically connected to the component;
An electrical board support member provided with the electrical board;
First fixing means disposed on the component member support member and electrically connected to the component member;
A second fixing means disposed on the electrical board support member, electrically connected to the electrical board, and connectable to the first fixing means;
Is provided,
One of the first and second fixing means is supported by the component member support member or the electrical board support member so as to be movable between a position for connection to the other and a position for releasing the connection. And the second fixing means are coupled to fix the component member support member and the electrical board support member, and to electrically connect the first fixing means and the second fixing means. An image forming apparatus. One end of the electrical board support member is pivotally supported by the apparatus body so as to be openable and closable,
The image forming apparatus according to claim 1, wherein the first and second fixing units function as an opening / closing lock mechanism that locks and unlocks the opening / closing of the electrical board support member.   The said 2nd fixing means is slidably supported by the said electrical circuit board support member in the position connected with respect to the said 1st fixing means, and the position which cancels | releases connection, The Claim 1 or 2 characterized by the above-mentioned. The image forming apparatus described.   The second fixing means is provided with a second engaging portion that is engageable with a first engaging portion provided on the component member supporting member when the second fixing means is connected to the first fixing means. The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus.   The image forming apparatus according to claim 1, wherein the second fixing unit is provided with a handle for moving the fixing unit. Covering the electrical substrate support member, provided with a cover member that is pivotally supported at one end so as to be opened and closed on the apparatus body,
The image forming apparatus according to claim 1, wherein the second fixing unit and the cover member are provided with a cover member opening / closing lock mechanism for locking the opening / closing of the cover member.   The image forming apparatus according to claim 1, wherein the constituent member is an image forming unit.

Images