JP2009128562A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus facilitating detachment of a connecting member, such as a wire and a connector, and an electric equipment substrate, widely preventing poor connection when attaching/detaching the members, and damages on the members caused by static electricity, then facilitating the operation, and reducing the operating time, that is, enhancing the operability. <P>SOLUTION: Regarding the image forming apparatus 100, high-voltage substrates 25a to 25d with connectors 27a to be connected to image-forming drive units 23a to 23d are arranged in a first electrical equipment box 51, and a power supply substrate 31a and a control substrate 31b are arranged in a second electrical equipment box 52. A sliding member 57 is disposed under the bottom side surface section 51d of the first electrical equipment box 51, a guiding member 59 that slidably supports the sliding member 57 is disposed on the top side surface section 52b of the second electrical equipment box 52, and the second hinge part 35 of the second electrical equipment box 52 is openably/closably connected to the first hinge part 34 of a rear side plate 21. <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. 8, image forming portions Pa to Pd are arranged 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 for supplying driving power to the image forming drive units 23a to 23d, etc. are provided on the further back 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. 9, the first hinge portion 34 has two pins 34a protruding upward along the vertical direction, and the second hinge portion 35 is engageable with the pin 34a. A hole 35a is provided, and 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.

  FIG. 11 shows a side view of FIG. 8 as viewed from the left side, and FIG. 12 shows the arrangement order of each member shown in FIG. ) Are arranged in the order of the high-voltage boards 25a to 25d and the electrical equipment box 33, 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. As shown in FIG. 12, the high-voltage boards 25a to 25d are provided with connectors 27a and wirings 27b (dashed lines). The connectors 27a are connected to the image forming drive units 23 to 23d, and the wirings 27b are The power supply board 31a and the control board 31b are connected. The power supply board 31a is connected to a power outlet 29 (see FIG. 8).

  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, so that the work becomes complicated and the work time becomes longer, or If the removed connector or wiring is re-installed, incorrect connection may result in damage to the apparatus body.

Therefore, a method for simplifying the adjustment and maintenance of such components has been proposed. For example, in Patent Document 1, in an image forming apparatus provided with a drive source and an electrical board for image formation on the outer surface of the apparatus main body, the drive source (image forming drive unit) and the electric circuit board (electric board) are covered. A board support member that can be opened and closed is attached to the main body of the apparatus, and the control board is housed in the board support member, so that it is possible to expose the drive source and the board placed inside, and to perform complicated removal work There is disclosed a method that makes it possible to easily perform adjustment work and maintenance.
JP 2001-347723 A

  However, in the method of Patent Document 1, it is possible to expose the image forming drive unit, the high-voltage board, and the like, but only the control board is accommodated in the board support member, and other electrical boards such as the high-voltage board. Cannot be removed easily.

  For this reason, when other electrical boards are removed or installed, the image forming apparatus may be damaged due to poor connection of wiring or static electricity generated by the touch of the operator during work, There is a risk of problems such as extension. In particular, the high-voltage board is easily affected by poor connection of wiring and static electricity, so these problems are likely to occur.

  In view of the above problems, the present invention facilitates the removal of connection members such as wiring and connectors and electrical boards, and prevents a wide range of connection failures and damage due to static electricity during the attachment and removal of these members, thereby facilitating work. An object of the present invention is to provide an image forming apparatus capable of improving workability such as shortening of work time.

  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, a first electrical board having a connection terminal electrically connected to the constituent member; A second electrical board electrically connected to the electrical board; a first electrical board support member provided with the first electrical board; the second electrical board provided; and the first electrical board. A second electrical board support member that slidably supports the board support member between a first position where the connection terminal connects to the component member and a second position where the connection terminal is removed from the component member; It is characterized by that.

  Further, the present invention is characterized in that one end of the second electrical board support member is pivotally supported by the apparatus main body, and the first electrical board support member is integrally opened and closed with the second electrical board support member. It is said.

  Further, the present invention provides a lock mechanism that locks and unlocks the opening and closing of the first and second electrical board support members by sliding the first electrical board support members to the first and second positions, respectively. Is featured.

  According to the present invention, the lock mechanism includes an engagement groove provided in the apparatus main body, and an engagement protrusion provided in the first electrical board support member and engageable with the engagement groove. It is a feature.

  In the invention, it is preferable that the first electrical board support member is provided with a high voltage board for supplying driving power to the 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 first electrical component board having the connection terminal electrically connected to the constituent member, the first A second electrical board electrically connected to the electrical board; a first board support member on which the first electrical board is disposed; and a second electrical board, wherein the first electrical board support member is By providing the second electrical board support member that is slidably supported at the first and second positions, the first electrical board can be connected to the constituent members only by sliding the first electrical board support member. Detachable.

  Further, when connecting or removing such an electrical board, it is not necessary to remove wiring connected to other components, electrical board, or the like from the electrical board. In addition, since the operator does not touch the first electrical board, the connection terminal, and the wiring when connecting and removing the electrical board, it is possible to prevent the generation of static electricity. Thereby, it becomes easy and safe to connect and remove the electrical board to and from the components. In addition, since easy and safe work can be performed in this way, workability can be improved, such as avoiding complicated 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 second electrical board support member is pivotally supported on the apparatus body so as to be openable and closable. By opening and closing together with the second electrical board support member, the first and second electrical board support members can be opened and closed at one fulcrum, so that it is easier and safer Can be accessed.

  According to the third configuration of the present invention, in the image forming apparatus having the second configuration, the first and second electrical circuit board support members slide in the first and second positions, respectively. (2) By providing a lock mechanism capable of locking the opening / closing of the electrical board support member, it is possible to prevent the first electrical board support member and the second electrical board support member from opening unexpectedly and disconnecting the connection terminals from the constituent members. Can be safer.

  According to the fourth configuration of the present invention, in the image forming apparatus having the third configuration, the engagement groove provided in the apparatus main body and the engagement provided in the first electrical board support member as the lock mechanism. By using the engagement protrusion that can be engaged with the groove, the first electrical board support member and the second electrical board support member cannot be opened unless the connection terminal is removed from the constituent members, which makes it safer. .

  According to the fifth configuration of the present invention, in the image forming apparatus having any one of the first to fourth configurations, the high-voltage substrate that supplies driving power to the image forming unit is provided on the first electrical substrate support member. By disposing, the connection and removal of the high-voltage board, which is likely to cause damage to the main body of the device due to poor connection or disconnection, can be separated from the other electrical boards, and only the high-voltage board can be connected and removed easily and safely. It is easier, safer and more effective.

  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 plan view of the electrical equipment box used in the image forming apparatus according to the present embodiment as viewed from the rear side of the apparatus main body. FIG. 3A is an engagement between the first electrical equipment box and the second electrical equipment box. FIG. 3B is a partial plan view showing the part, and FIG. 3B is a partial side view as seen from the left side of FIG. Portions common to FIGS. 1 and 8 to 12 are denoted by common reference numerals, and description thereof is omitted.

  As shown in FIG. 2, the electrical box 50 has a flat rectangular box shape that opens to the back side of the apparatus main body (the front side in the figure), and a first electrical box (first electrical board support member) 51 disposed on the upper side. And a second electrical equipment box (second electrical equipment substrate support member) 52 disposed on the lower side. 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.

  Further, the upper side surface portion 51b of the first electrical equipment box 51 is disposed at a predetermined distance from the upper side surface portion 21a of the rear side plate 21 and substantially parallel to the upper side surface portion 21a. A (locking mechanism) 55 projects upward. The engagement protrusion 55 is formed at a position and a length that can be engaged with an engagement groove (lock mechanism) 61 provided on the back side plate 21 described later.

  As shown in FIGS. 2 and 3, the left and right sides of the lower side surface portion 51d of the first electrical equipment box 51 are arranged at one end portion at substantially the same position as the bottom surface portion 51a along the vertical direction of the bottom surface portion 51a. The sliding member 57 is disposed so that the opposite end 57b protrudes from the opening end of the first electrical equipment box 51 to the back side (right side in FIG. 3B). As shown in FIG. 3A, 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. 2 and 3A). In the guide member 59, the end 59a on the back side plate 21 side protrudes from the bottom side 52a to the back side plate 21 side (the left side in FIG. 3B) along the direction perpendicular to the bottom surface portion 52a of the second electrical equipment box 52. The opposite end 59b is disposed at substantially the same position as the open end of the second electrical equipment box 52.

  4 and 5, which will be described later, when the sliding member 57 slides toward the end portion 59a of the guide member 59, the connector (connection terminal) 27a is connected to the image forming drive units 23a to 23a. The connector 27a is formed so as to be detached from the image forming drive units 23a to 23d when it is connected to 23d and slides toward the end portion 59b. 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. Can be guided to a position where the connector 27a can be connected to the image forming units 23a to 23d.

  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. 2, 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 toward the end portion 59a of the guide member 59, the engaging groove 55 is fitted into the engaging groove 61 (see FIG. 4), and the engaging groove 61 slides toward the end portion 59b. When moved, the engagement protrusion 55 is formed so as to be disengaged from the engagement groove 61 (see FIG. 5).

  Further, as shown in FIG. 2, an electrical box fixing member 67 is disposed on the upper side surface portion 51 b of the first electrical equipment box 51, and the first electrical equipment box 51 and the back side plate 21 can be fixed. . The details of the electrical box fixing member 67 will be described later.

  Next, the opening / closing operation | movement of the electrical equipment box 50 of this invention is demonstrated based on FIG. 4, FIG. FIG. 4A is a partial side view showing a state in which the first electrical equipment box and the rear side plate are engaged, and FIG. 4B is a plan view of FIG. 4A viewed from above. is there. FIG. 5A is a partial side view showing a state in which the engagement between the first electrical equipment box and the rear side plate is released. FIG. 5B is a view of FIG. It is a top view. Portions common to FIGS. 1 to 3 are denoted by common reference numerals and description thereof is omitted.

  First, the operation of opening the electrical box 50 will be described. 4A and 4B, 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. As described above, the connectors 27a of the high-voltage boards 25a to 25d are connected to the image forming drive units 23a to 23d, respectively.

  From this state, when the inner surface of the first electrical equipment box 51 is gripped and pulled in the direction of the white arrow, 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 (second The connector 27a can be detached from the image forming drive units 23a to 23d, and the engagement protrusion 55 of the first electrical equipment box 51 can be detached from the engagement groove 61 of the rear side plate 21.

  Thereby, as shown to Fig.5 (a) and FIG.5 (b), the engagement with the 1st electrical equipment box 51 and the back side board 21 is cancelled | released. Then, when the first electrical component box 51 or the second electrical component box 52 is rotated to the back side of the device, the first electrical component box 51 can be opened and closed integrally with the second electrical component box 52, and the first electrical component box 51 can be opened and closed. The box 51 and the second 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. 5A and FIG. 5 (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. 5A and 5B, the sliding member 57 of the first electrical component box 51 moves to the guide member 59 of the second electrical component box 52. Is slid toward the end 59a. As a result, as shown in FIGS. 4A and 4B, 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 67.

  4A, the wires 27b (one-dot chain lines) whose one ends are connected to the high-voltage boards 25a to 25d are grouped together on the left side surface 51c side of the first electrical equipment box 51, for example. After that, a left side surface portion of the first electrical equipment box 51 and the second electrical equipment box 52 is provided with a hole (not shown) provided in the lower side surface portion 51d of the first electrical equipment box 51 and the upper side surface portion 52b of the second electrical equipment box 52. 51c, 52c can be penetrated and then disposed in the second electrical box 52, and connected to the power supply board 31a and the control board 31b in the second electrical box 52.

  Further, the wiring 27b can be opened and closed together with the first electrical component box 51 and the second electrical component box 52, and does not need to be connected and disconnected when the connector 27a is connected and disconnected. It may be connected to the control board 31b.

  As shown in FIG. 2, the first electrical equipment box 51 is provided with the electrical equipment box fixing member 67 described above. After the first electrical equipment box 51 and the second electrical equipment box 52 are closed, the electrical equipment box fastening member 67 One electrical box 51 is fixed to the back side plate 21. Fig. 6 (a) shows the electrical box fixing when the first electrical box is fixed to the back side plate in Fig. 6 (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. 6A and FIG. 6B, the first electrical component box 51 is formed of a bent rectangular plate-like member on the right side surface portion 51e side at the upper end portion of the bottom surface portion 51a (see FIG. 2). An electrical box fixing member 67 is provided.

  The electrical box fixing member 67 is provided with a support portion 67a provided along the bottom surface portion 51a (see FIG. 6) of the first electrical device box 51, and protrudes substantially horizontally from the upper end of the support portion 67a toward the back side plate 21 side. A fixed portion 67b, and a substantially L-shaped hook portion 67c that is erected upward from the end on the back side plate 21 side of the connecting portion 67b and that protrudes to the back side plate 21 side. It is composed of

  A handle 68 protrudes from the lower end of the support portion 67a toward the side opposite to the back side plate 21, and is provided on the back side plate 21 along the vertical direction above the left end of the handle 68. A guide groove 69 that engages with the guide projection 75 to hold the electrical box fixing member 67 and guides the movement in the vertical direction is provided. Further, a cutout hole 70 that can be engaged with a protruding piece 78a (see FIG. 7) provided in a back cover 78 (see FIG. 7) described later is provided on the upper end side of the support portion 67a.

  A first fixing member 71 is disposed along the width direction at the end of the fixing portion 67b on the hooking portion 67c side. The first fixing member 71 is composed of a first connection portion 71a provided at the center in the width direction and screws 71b provided at both ends. In addition, projecting pieces 73 that can be fitted in through holes 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 67c.

  On the other hand, a second fixing member 76 connected to the first fixing member 71 is provided at a position facing the first fixing member 71 of the back side plate 21 from below. The second fixing member 76 includes a second connecting portion 76a into which the first connecting portion 71a of the first fixing member 71 is fitted, and a screw hole 76b to which the screw 71b is fixed.

  As a result, the first electrical box 51 and the second electrical box 52 are closed, and the engagement protrusion 55 of the first electrical box 51 is engaged with the engagement groove 61 of the rear side plate 21, and then the handle 68 is grasped to hold the electrical box. When the fixing member 67 is lowered, the protruding piece 73 of the hook portion 67c is fitted into the through hole 77 of the rear side plate 21, and the first connection portion 71a of the fixing portion 67b is fitted to the second connection portion 76a.

  Thereafter, the first electrical box 51 can be fixed by fixing the screw 71b of the fixing portion 67b to the screw hole 76b. The second electrical box 52 is also fixed at the same time. In addition, it is also possible to connect the first connecting portion 71a and the second connecting portion 76a with wiring such as the wiring 27b, and connect the first connecting portion 71a and the second connecting portion 76a to make electrical connection. . However, the method for fixing the first electrical component box 51 to the back side plate 21 is not particularly limited as long as the first electrical component box 51 can be fixed, and other methods can be used.

  FIG. 7 is a diagram showing an engaged state between the back cover and the first electrical equipment box, and FIG. 7A 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 6 are denoted by common reference numerals, and description thereof is omitted.

  The back cover 78 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 78 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 78 is closed. Further, a projecting piece 78 a fitted into the cutout hole 70 is provided at a position facing the cutout hole 70 of the support portion 67 a of the electrical box fixing member 67 on the upper side surface portion of the back cover 78.

  Thereby, after closing the 1st electrical equipment box 51 and the 2nd electrical equipment box 52 as mentioned above, if the 1st protrusion piece 78a and the cutout hole 70 are engaged, the back cover 78 can be closed. Note that the back cover 78 and the back side plate 21 are connected to each other by a hinge part 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.

  As described above, the electrical box 50 is composed of the first electrical box 51 and the second electrical box 52, and the high voltage boards 25a to 25d connected to the image forming drive units 23a to 23d via the connector 27a are disposed. Since the 1 electrical box 51 is slidably supported with respect to the second electrical box 52, it is easy and safe to connect and disconnect the connector 27a of the high voltage boards 25a to 25d and the image forming drive units 23a to 23d. It becomes.

  Further, since it is not necessary to disconnect the wiring 27b between the high-voltage board 25 and the power supply board 31a or the control board 31b, such connection and disconnection are easier and safer. In addition, when the connector 27a is removed, the operator can be prevented from touching the high-voltage boards 25a to 25d, the connector 27a, and the wiring 27b, so that generation of static electricity can be prevented. Since the high-voltage boards 25a to 25d can be connected and detached easily and safely as described above, workability can be improved, such as avoiding the complexity of work and shortening work time.

  Further, in the above embodiment, the first and second electrical equipment boxes 51 and 52 can be opened and closed with the one side fulcrum as a fulcrum, so that the internal members such as the image forming drive units 23a to 23d can be accessed more easily and safely. .

  Moreover, in the said embodiment, since it was decided to provide the engagement protrusion 55 in the 1st electrical equipment box 51, the engagement groove | channel 61 in the back side board 21, and lock the opening and closing of the 1st electrical equipment box 51 and the 2nd electrical equipment box 52, It is possible to prevent the first electrical component box 51 and the second electrical component box 52 from being opened unexpectedly, and the connector 27a from being disconnected from the image forming drive units 23a to 23d, which is safer.

  In addition, since the first electrical equipment box 51 and the second electrical equipment box 52 cannot be opened unless the connector 27a is removed, the safety is further improved. 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. The opening / closing lock is not limited to the present embodiment. For example, the first electrical equipment box 51 and the rear side plate 21 can be locked by the electrical equipment box fixing member 67 described above, or by other means, such as screws. .

  In the above embodiment, since the high-voltage boards 25a to 25d are disposed in the first electrical equipment box 51, the high-voltage boards 25a to 25d that are likely to cause damage to the apparatus main body due to poor connection or disconnection of the connector 27a are used. It becomes possible to separate and remove from 31a, 31b. Therefore, it becomes easier, safer and more effective. However, the electrical board disposed in the first electrical box 51 is not particularly limited to the high-voltage boards 25a to 25d, as long as it is connected to a constituent member used for image formation via the connector 27a. It is not particularly limited. Further, the number of electrical boxes constituting the electrical box 50 is not limited to two, and may be three or more.

  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, two sliding members 57 and two guide members 59 are provided. However, as long as the first electrical component box 51 can slide with the second electrical component box 52, the configuration is particularly limited to this configuration. Instead, it can be appropriately designed such that a concave portion is provided on one of the first electrical equipment box 51 and the second electrical equipment box 52, and a convex portion or a projection that can be fitted to the other is provided on the other. Moreover, the quantity is not specifically limited, It can also be made into 1 or 3 or more. Further, the second electrical component box 52 can be slidably supported by the first electrical component box 51.

  Further, in the above embodiment, the sliding member 57 and the guide member 59 are protruded from the opening end of the first electrical equipment box 51 to the back side of the apparatus main body and from the bottom surface portion 52a of the second electrical equipment box 52 to the front side of the equipment body. However, if the first electrical component box 51 can be guided with respect to the second electrical component box 52, these may be appropriately set depending on the size and arrangement of the first electrical component box 51 and the second electrical component box 52, and are not necessarily protruded. There is no need to let them.

  Moreover, in the said embodiment, although the 1st electrical equipment box 51 and the 2nd electrical equipment box 52 were made openable and closable horizontally by making the left side back of an apparatus into a rotation fulcrum, this rotation fulcrum is not specifically limited, An apparatus It may be provided on the right side of the back surface, 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 in the up-down direction, work is performed by using a support member or the like as appropriate in the opened state and supporting the first electrical equipment box 51 and the second electrical equipment box 52 so that they do not open or close too much. It is also possible to improve the performance.

  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.

  According to the present invention, in an image forming apparatus that forms an image by operating a component member, the first electrical component board having a connection terminal electrically connected to the component member and the connection terminal are electrically connected. A second electrical board; a first electrical board support member on which the first electrical board is disposed; and a second electrical board support member on which the first electrical board support member is disposed. A second electrical circuit board support member that is slidably supported at a first position connected to the component member and a second position removed from the component member is provided.

  Thus, since the first electrical board can be connected to and detached from the constituent members by simply sliding the first electrical board support member, other constituent members or Since it is not necessary to remove the wiring connected to the electrical board or the like, and the operator does not touch the first electrical board, the connection terminal, or the wiring, generation of static electricity can be prevented. Therefore, it is easy and safe to connect and remove the electrical board to and from the above-described components, and it is possible to improve workability such as avoiding the complexity of work and shortening the work time.

  Further, one end of the second electrical board support member is pivotally supported on the apparatus main body so as to be openable and closable, and the first electrical board support member is opened and closed integrally with the second electrical board support member, so that the first and Since the second electric circuit board support member can be opened and closed, the internal members such as the above-described constituent members can be accessed more easily and safely. In addition, the first electrical circuit board support member slides to the first and second positions, respectively, thereby providing a lock mechanism that can lock the opening and closing of the first and second electrical circuit board support members. The electrical board support member and the second electrical board support member are opened, and the connection terminals can be prevented from being detached from the constituent members, which is safer.

  Further, by using an engaging groove provided in the apparatus main body and an engaging protrusion provided in the first electrical board support member and engageable with the engaging groove as the locking mechanism, the connection terminal is configured as a constituent member. Since it cannot open the 1st electrical equipment substrate support member and the 2nd electrical equipment substrate support member if it does not remove from, it becomes safer.

  In addition, by disposing a high-voltage board that supplies drive power to the image forming unit on the first electrical board support member, it is possible to connect and remove a high-voltage board that is likely to cause damage to the main body due to poor connection or disconnection. Therefore, it is easier and safer and more effective because only the high-voltage board can be connected and detached easily and safely.

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 figures which show the engaging part of the 1st electrical equipment box and the 2nd electrical equipment box, Comprising: Fig.3 (a) is a partial top view, FIG.3 (b) is the left side of Fig.3 (a). It is the partial side view seen from. These are the figures which show the state which the 1st electrical equipment box and the back side board are engaging, Comprising: Fig.4 (a) is a partial side view, FIG.4 (b) shows FIG.4 (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.5 (a) is a partial side view, FIG.5 (b) is FIG.5 (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.6 (a) is a perspective view which shows the state by which fixation of the 1st electrical equipment box was cancelled | released, FIG.6 (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. 7 (a) is a perspective view which shows the state which opened the back cover, FIG.7 (b) is a perspective view which shows the state which closed the back cover. 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.

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 25a to 25d High voltage substrate (first electrical component substrate)
27 connecting member 27a connector (connecting terminal)
27b Wiring 31a Power supply board (second electrical board)
31b Control board (second electrical board)
33 Electrical box 34 First hinge part 35 Second hinge part 50 Electrical box 51 First electrical box (first electrical board support member)
52 Second electrical box (second electrical board support member)
55 Engaging projection (locking mechanism)
57 Sliding member 59 Guide member 61 Engaging groove (locking mechanism)
67 Electrical box fixing member 70 Cutout hole 71 First fixing member 76 Second fixing member 78 Back cover 100 Image forming apparatus Pa to Pd Image forming unit

Claims (5)

In an image forming apparatus that forms an image by operating a constituent member,
A first electrical board having a connection terminal electrically connected to the component; a second electrical board electrically connected to the first electrical board;
A first electrical board support member on which the first electrical board is disposed;
The second electrical board is disposed, and the first electrical board support member is slid into a first position where the connection terminal connects to the component member and a second position where the connection terminal is removed from the component member. A second electrical circuit board support member that is movably supported;
An image forming apparatus comprising:   The one end of the second electrical board support member is pivotally supported by the apparatus body so as to be openable and closable, and the first electrical board support member is integrally opened and closed with the second electrical board support member. The image forming apparatus described in 1.   A lock mechanism for locking and unlocking the opening and closing of the first and second electrical board support members is provided by sliding the first electrical board support members to the first and second positions, respectively. The image forming apparatus according to claim 2.   4. The lock mechanism includes an engagement groove provided in the apparatus main body, and an engagement protrusion provided in the first electrical board support member and engageable with the engagement groove. The image forming apparatus described in 1.   5. The image forming apparatus according to claim 1, wherein the first electrical board support member is provided with a high-voltage substrate that supplies driving power to the image forming unit.

Images