JP5060267B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus including an image reading unit that optically reads an image of a document.

  The image reading unit irradiates light from a light source onto a document set on a document placement surface via a lens or the like, captures reflected light from the document with a CCD (charge coupled device), and reads the document. It is configured and used as an optical system unit in which a light source, a lens, a CCD, etc. are built in a case. The optical system unit is placed on an upper frame provided on the upper portion of the image forming apparatus, and one document placement surface is integrally provided on the upper frame, and the optical system unit, the document placement surface, Are separated.

  By the way, when the optical system unit is misaligned with respect to the document placement surface, there is a risk of image failure. Therefore, the positional deviation is eliminated by adjusting the height of the optical system unit with respect to the upper frame.

  As a height adjusting means for adjusting the positional deviation, a stepwise positional deviation adjusting member is slidably disposed between the upper frame and the optical system unit, and the optical system unit is supported by the positional deviation adjusting member. The thing of a structure is proposed (for example, refer patent document 1).

In the case of this proposed technology, the position of the optical system unit is changed by sliding the position adjustment member in the horizontal direction, thereby changing the height position of the optical system unit. It is possible to eliminate the positional deviation of the optical system unit with respect to the document placement surface.
JP 2004-274651 A

  However, in the case of the technique disclosed in Patent Document 1 described above, the main body side cover fixed to the side surface of the upper frame does not move, but when the height of the optical system unit is adjusted by the height adjusting means, Since the frame-shaped optical system unit side cover attached so as to cover the base plate is displaced, there is a problem in that a shift occurs between the positions of the main body side cover and the optical system unit side cover.

  The present invention has been made to solve the above-described problems of the prior art, and even if the height position of the optical system unit is adjusted by the height adjusting means, the displacement of the cover on the optical system unit side is not affected by the displacement of the cover on the optical system unit side. An object of the present invention is to provide an image forming apparatus capable of suppressing positional deviation between both covers by following the covers.

An image forming apparatus according to a first aspect of the present invention includes: an image forming apparatus main body; an upper frame provided on an upper side of the image forming apparatus main body for mounting an image reading optical system unit; and the upper frame. The optical system that is placed on the top of the optical system, the height of one side surface is adjusted by the height adjusting unit, and an optical system unit side cover that covers at least the side surface is integrally provided. A unit, and a body-side cover that covers a side surface of the main body of the image forming apparatus and a side surface of the upper frame, and is swingable about an axis perpendicular to the side surface of the upper frame. adjacent the upper and lower covers and said body side cover, and the optical system unit side cover and the body side engages cover and are engaged, with the height adjustment of the optical system unit according to said height adjusting means The optical system unit side height varies cover, following this, the main body cover being engaged with the optical system unit side cover suppresses positional deviation of the two covers by swinging It is characterized by getting .

  An image forming apparatus according to a second aspect of the present invention is the image forming apparatus according to the first aspect, wherein an upper edge of the main body side cover is bent inwardly and a lower edge of the optical system unit side cover is The main body side cover is configured to be fitted inside the upper edge of the upper edge of the cover, which is bent in a stepped shape.

In the case of the image forming apparatus according to the present invention, when the height of one side surface of the optical system unit is adjusted by the height adjusting unit, it corresponds to the one side surface of the optical system unit side cover provided integrally with the optical system unit. The height of the part that changes. In addition, the main body side cover engaged with the optical system unit side cover according to the height adjustment of one side surface of the optical system unit is about an axis perpendicular to the side surface of the upper frame covered with the main body side cover. Swing. At this time, if the inclination based on the swing of the main body side cover is made to correspond to the inclination based on the height change of the optical system unit side cover, the positional deviation of both covers can be suppressed.

  In the image forming apparatus according to the second aspect of the present invention, since there is an overlapping portion between both covers, a gap can be eliminated between both covers.

  First, an image forming apparatus according to the present invention will be described.

  FIG. 1 is a front view showing an outline of an embodiment of an image forming apparatus according to the present invention, and FIG. 2 is a perspective view showing an upper portion of the image forming apparatus of FIG. 1 and 2, the XX direction is referred to as the left-right direction, and the Y-Y direction is referred to as the front-rear direction. In particular, the -X direction is leftward, the + X direction is rightward, the -Y direction is frontward, and the + Y direction is rearward. That's it. The same applies to FIGS. 3 to 10 described later.

  The image forming apparatus 10 is used as a copying machine, and has a box-shaped image forming apparatus main body (hereinafter referred to as an apparatus main body) 11 and a box-shaped image provided above the apparatus main body 11. A reading unit 16. The upper part of the apparatus main body 11 has a left support part 11a and a rear right support part 11b, and the image reading part 16 is above the apparatus main body 11 and is supported by the support part 11a and the support part 11b. Has been. The back side above the apparatus body 11 and below the image reading unit 16 is closed by a back cover 11c.

  The image reading unit 16 reads a document placed on the contact glass 31 functioning as a document placement surface by the optical system unit 20, performs the predetermined processing on the read image information, and forms an image to be described later. To the unit 12.

  The apparatus main body 11 includes an image forming unit 12 that forms an image based on image information of a document read by the optical system unit 20, and a fixing process performed on the image formed by the image forming unit 12 and transferred to a sheet. A fixing unit 13 to be applied and a paper storage unit 14 for storing a transfer paper are provided. At the top of the apparatus main body 11, a paper discharge unit 15 including an in-body discharge tray 151 that receives the discharged paper P after fixing processing is provided.

  The image forming unit 12 forms a toner image on a sheet fed from the sheet storage unit 14. In the present embodiment, the image forming unit 12 includes a magenta unit 12M, a cyan unit 12C, a yellow unit 12Y, and a black unit 12K that are sequentially arranged from the upstream side (the right side in FIG. 1) to the downstream side. have.

  Each unit 12M, 12C, 12Y, and 12K includes a photosensitive drum 121 and a developing device 122, respectively. Each photosensitive drum 121 receives supply of toner from a corresponding developing device 122 while rotating counterclockwise in FIG. Each developing device 122 is replenished with toner from an unillustrated toner cartridge disposed on the front side of the apparatus main body 11 (the front side of the paper surface of FIG. 1).

  A charger 123 is provided immediately below each photoconductor drum 121, and an exposure device 124 is provided further below each charger 123. Each photosensitive drum 121 is uniformly charged at its peripheral surface by the charger 123, and laser light corresponding to each color based on image data read by the optical system unit 20 is charged from each exposure device 124. By irradiating the peripheral surface of each photoconductive drum 121, an electrostatic latent image is formed on the peripheral surface of each photoconductive drum 121. By supplying toner from the developing device 122 to the electrostatic latent image, a toner image is formed on the peripheral surface of the photosensitive drum 121.

  A transfer belt 125 stretched between the driving roller 125 a and the driven roller 125 b is provided at a position above the photosensitive drum 121 so as to contact the photosensitive drum 121. The transfer belt 125 is driven against a peripheral surface of the photoconductive drum 121 by a transfer roller 125c provided corresponding to each photoconductive drum 121, while being synchronized with each photoconductive drum 121, a driving roller and a driven roller. Orbit around.

  Accordingly, when the transfer belt 125 circulates, the magenta toner image is transferred onto the surface of the transfer belt 125 by the photosensitive drum 121 of the magenta unit 12M, and then the photosensitive drum of the cyan unit 12C is placed at the same position on the transfer belt 125. The transfer of the cyan toner image by 121 is performed in the overcoating state, and then the transfer of the yellow toner image by the photosensitive drum 121 of the yellow unit 12Y to the same position of the transfer belt 125 is performed in the overcoating state. The transfer of the black toner image by the photosensitive drum 121 of the black unit 12K is performed in an overcoating state, whereby a color image image is formed on the surface of the transfer belt 125. This color image is transferred to the paper P conveyed from the paper storage unit 14.

  A cleaning device 126 that removes and cleans residual toner on the peripheral surface of the photosensitive drum 121 is provided at the left position of each photosensitive drum 121. The peripheral surface of the photosensitive drum 121 cleaned by the cleaning device 126 goes to the charger 123 for a new charging process.

  Waste toner removed from the peripheral surface of the photosensitive drum 121 by the cleaning device 126 is collected and stored in a toner collection bottle (not shown) through a predetermined path.

  A paper conveyance path 111 extending in the vertical direction is formed at the left position of the image forming unit 12. A conveyance roller pair 112 is provided at an appropriate position on the sheet conveyance path 111. Then, the sheet from the sheet storage unit 14 is conveyed toward the transfer belt 125 that is wound around the driving roller 125 a by the driving of the conveying roller pair 112.

  In the sheet conveyance path 111, a second transfer roller 113 that is in contact with the surface of the transfer belt 125 is provided at a position facing the driving roller 125 a, and the sheet P being conveyed along the sheet conveyance path 111 is separated from the transfer belt 125. The toner image on the transfer belt 125 is transferred onto the paper P by being pressed and sandwiched between the second transfer roller 113.

  A transfer belt cleaning device 127 that removes residual toner remaining on the surface of the transfer belt 125 is provided at the right end portion of the transfer belt 125. The remaining toner is removed by the transfer belt cleaning device 127 and cleaned, and is circulated for the next transfer process.

  The fixing unit 13 performs a fixing process on the toner image on the paper transferred by the image forming unit 12, and includes a fixing roller 131 having an energization heating element such as a halogen lamp as a heating source therein. On the left side, a pressure roller 132 disposed opposite to the fixing roller 131 is provided. Then, the transfer-processed paper P derived from the image forming unit 12 via the second transfer roller 113 is subjected to a heat treatment that is heated by the fixing roller 131 while being pressed between the fixing roller 131 and the pressure roller 132. The toner image is fixed on the paper P, and a stable color image is formed on the paper.

  The color-printed paper P that has been subjected to the fixing process is discharged toward an in-body paper discharge tray 151 provided in the apparatus main body 11 through a paper discharge conveyance path 114 that extends from the top of the fixing unit 13. It will be.

  The paper storage unit 14 has a paper tray 141 that is detachably mounted at a position below the exposure device 124 in the apparatus main body 11. A sheet bundle is stored in the sheet tray 141. Then, the sheet P is fed out from the sheet bundle stored in the sheet tray 141 one by one by driving the pickup roller 142, and passes through the sheet conveyance path 111 to the nip portion between the second transfer roller 113 and the transfer belt 125. Be directed.

  Next, the image reading unit 16 will be described.

  3 is a perspective view showing the configuration of the image reading unit 16, FIG. 4 is an exploded perspective view showing the configuration of the image reading unit 16, FIG. 5 is a cross-sectional view showing the configuration of the height adjusting means, and FIG. FIG. 7 is an explanatory view (perspective view) of an engaging portion between the optical system unit side cover and the main body side cover, and FIG. 8 is a perspective view of the engaging portion as viewed from the back side. 9 is an exploded view of the engaging portion of FIG. 8 viewed from the back side, FIG. 10 is an enlarged perspective view of the engaging portion of FIG. 8, and FIG. 11 is a view of the optical system unit side cover and the main body side cover. It is sectional drawing which shows a fitting state.

  The image reading unit 16 includes an upper frame 16d provided on the upper part of the apparatus main body 11, and an optical system unit 20 placed on the upper frame 16d.

  The upper frame 16d has a rectangular bottom surface 16a in the illustrated example and three side surfaces standing from the front side, the right side, and the rear side of the bottom surface 16a. 160 is attached. The main body side cover 160 is formed so as to cover not only the right side surface of the upper frame 16d but also the right side surface of the support column 11b.

  The optical system unit 20 reads a document image from a document placed on a contact glass 31 provided so as to constitute an upper surface of a case 30 to be described later via the contact glass 31 from below, for example, a hexahedron. A case 30 having a box shape, a reading unit 40 which is mounted in the case 30 so as to be movable forward and backward in the left-right direction, and which receives reflected light by irradiating light on the document surface, and the reading unit And a lens / sensor unit 50 that collects reflected light from 40 and captures it as image data.

  The case 30 is configured to be placed on the upper portion of the upper frame 16d (see FIG. 4), and a frame shape is formed on the case 30 so as to cover the periphery of the contact glass 31. The optical system unit side cover 21 is attached. In this illustrated example, the optical system unit side cover 21 covers the periphery of the contact glass 31 and the upper part of the side surface of the case 30, and the inner part not covered with the cover 21 of the contact glass 31 constitutes a document placement surface. To do.

  The lower end portion 21b of the optical system unit side cover 21 is formed flat, and the upper edge portion 160g of one main body side cover 160 is bent in a stepped shape on the inner side (see FIG. 11). The covers 21 and 160 are attached so that the lower end portion 21 b of the optical system unit side cover 21 fits outside the stepped portion 160 h on the upper edge of the main body side cover 160. Therefore, since there is an overlapping portion between the covers 21 and 160, a gap can be eliminated between the covers 21 and 160.

  The case 30 is provided with a document mat 161 for pressing the document P1 placed on the contact glass 31 (see FIGS. 1 and 3). In FIG. 2, the original mat 161 is omitted.

  The original mat 161 rotates forward and backward around the hinge axis of a hinge member 162 (see FIG. 3) provided in a pair at the rear position on the upper surface of the optical system unit side cover 21 (the back side as viewed from the position operated by the operator). The position can be changed between a closed position T1 in which the upper surface of the contact glass 31 is closed and an open position T2 in which the upper surface of the contact glass 31 is opened.

  At an appropriate position of the upper frame 16d, there is provided an operation panel 17 for inputting operation conditions relating to document reading, copying processing, etc., and an LCD (Liquid crystal) as an output means adjacent to the operation panel 17. display) 18 is provided. The operation unit 19 provided with the operation panel 17 and the LCD 18 can be detached so as to be separated from the upper frame 16d.

  The reading unit 40 moves toward the right starting from a position (home position) slightly shifted from the left end of the case 30 to the right, and thereby the document surface of the document P1 placed on the contact glass 31 After scanning, return to the home position.

  Such a reading unit 40 includes a light source unit 41 that irradiates light toward the document surface, and reflects light reflected from the light source unit 41 on the document surface along the optical path to cause a lens / sensor unit 50. And a mirror unit 42 for guiding to the center.

  The light source unit 41 includes a first scanning frame body 411 that is long in the left-right direction in a front view traveling forward and backward in the left-right direction, and the first scanning frame body supported by the first scanning frame body 411. A light source member 412 that is long in the front-rear direction orthogonal to the traveling direction of 411, and a first mirror 413 that reflects the reflected light from the original screen of the light emitted from the light source member 412 toward the left. I have.

  The light source member 412 is formed by arranging a plurality of unit LEDs (light sources) 412a made of light emitting diodes (LEDs) on a predetermined frame (see FIG. 3). The light emitted from the light source member 412 is reflected by the original surface of the original P1 through the contact glass 31. Then, the light L reflected by the original surface of the original P1 is input to the lens / sensor unit 50 through the plurality of mirrors 413, 422, 421, and a light signal is output from the CCD 51 provided in the lens / sensor unit 50. Is converted into an electrical signal and output to the image forming unit 12 as image information.

  Between the case 30 of the optical system unit 20 configured in this way and the upper frame 16d on which the optical system unit 20 is placed, as shown in FIG. 4, the right front of the four corners of the bottom surface 30a of the case 30 A height adjusting means 1 is provided in the vicinity of the corner on the side, and a leg 1A having a constant height is provided in the vicinity of the remaining three corners. The height adjusting means 1 can adjust the height of the right front portion of the case 30 with respect to the bottom surface 16a of the upper frame 16d.

  The height adjusting means 1 includes a height adjusting member 2 having a plurality of upper surfaces 2a whose height changes stepwise, a knob 3 formed integrally with the height adjusting member 2, and a height adjusting member. 2 and a case supporting member 4 provided to support the bottom surface 30a of the case 30 (see FIG. 5). In the present embodiment, the height adjusting member 2 having the knob 3 is provided on the upper frame 16d side, and the case support member 4 is provided on the case 30 side.

  The knob 3 has a lower end exposed from an opening 16b provided on the bottom surface 16a, and can be slid in the front-rear direction along the opening 16b. By the sliding movement of the knob 3, the height adjusting member 2 can slide in the front-rear direction along the bottom surface 16a of the upper frame 16d. In the present embodiment, the upper surface 2a has 10 different heights (each step is constant). The height adjusting member 2 is configured to be non-slidable by a fixing member, for example, a screw 8 (see FIG. 6). For example, the height adjusting member 2 is slid by engaging the tip of the screw 8 protruding from the screw hole 16e with one of a plurality of (for example, six) holes 2c provided on the side surface of the height adjusting member 2. It is configured to be disabled. In addition, 16c in FIG. 6 is a side plate of the upper frame 16d.

  The case support member 4 includes a base member 5 attached to the through hole 30b formed in the bottom surface 30a of the case 30, a base member fixture 6 disposed on the height adjustment member 2, and the base member fixture 6. And a fixing pin 7 for fixing the base member 5.

  The base member fixture 6 regulates the misalignment of the height adjusting member 2 in the left-right direction and the stepped pieces 6a, 6b provided in the front-rear direction straddling the two upper surfaces 2a having different heights in the height adjusting member 2. A pair of restriction pieces 6c and 6d provided on the left and right sides, and a ceiling surface 6f having a screw hole 6e into which a screw 7a formed at the tip of the fixing pin 7 is screwed (see FIGS. 5 and 6). Note that the difference between the height of the stepped piece 6a and the height of the stepped piece 6b is set to four steps on the upper surface 2a in the present embodiment so that the ceiling surface 6f is substantially horizontal.

  The base member 5 is made of, for example, rubber, and is formed in a substantially cylindrical shape. The inner edge of the through hole 30b is inserted into an annular groove 5a formed on the peripheral surface of the base member 5 and attached to the bottom surface 30a of the case 30. It has been. And the base member fixing tool 6 is being fixed to this base member 5 via the fixing pin 7 (refer FIG. 5).

  The height adjustment of the height adjusting means 1 configured as described above is used when the case 30 of the optical system unit 20 is inclined with respect to the contact glass 31 on which the document P1 is placed. The operation contents of the means 1 are performed as follows.

  First, the screw 8 is removed and the height adjusting member 2 is slidable.

  Subsequently, the operation unit 19 is separated and removed from the upper frame 16d, the case 30 of the optical system unit 20 is slightly lifted, and the knob 3 is slid in a desired direction in the front-rear direction, whereby the height of the case support member 4 is increased. Adjust the position and lower the case 30.

  Thereafter, when there is no need for readjustment, the screw 8 is attached, and the height adjusting member 2 is brought into a non-slidable state. Further, the operation unit 19 is attached to the upper frame 16d.

  Therefore, by grasping the knob 3 and sliding the height adjusting member 2 in a desired direction, the front side of the case 30 moves up and down with the two rear leg portions 1A as the swing fulcrum, thereby the case supporting member 4 The height position of is adjusted. By adjusting the height position of the case support member 4, the height of the bottom surface 30 a of the case 30 with respect to the bottom surface 16 a of the upper frame 16 d can be changed. Thereby, the position shift with respect to the upper frame 16d of the optical system unit 20 can be adjusted.

  When the inclination of the case 30 of the optical system unit 20 changes based on the height adjustment by the height adjusting means 1, the optical system unit side cover 21 attached to the case 30 changes in the same movement due to the change.

  The optical system unit side cover 21 is connected with the main body side cover 160 provided adjacent to the lower side of the optical system unit side cover 21 via the engaging portion 22, and the main body side cover 160 swings with respect to the upper frame 16d. It is possible. This will be described below.

  As shown in FIG. 4, the main body side cover 160 corresponds to an inverted L shape having a horizontal portion 160a and a vertical portion 160b so as to cover the right side surface of the upper frame 16d and the rear right column portion 11b. A shaft member 160c is provided at the intersection of the horizontal portion 160a and the vertical portion 160b. The shaft member 160c is formed so that its axial direction is perpendicular to the side surface of the case 30 (or the right side surface of the upper frame 16d) covered with the optical system unit side cover 21. Hooks 160d and 160e extending in the horizontal direction from the inner surface of the cover 160 and bent downward in the middle are provided at the front end portion of the horizontal portion 160a and the front end portion of the vertical portion 160b.

  The shaft member 160c is disposed so as to be positioned on a line connecting the two rear leg portions 1A functioning as a swing fulcrum that swings so that the front side of the case 30 moves up and down. In addition, 1B in FIG. 8 is a fixing portion for fixing one (right side) of the two legs 1A on the rear side.

  On the other hand, on the right side surface of the upper frame 16d, a circular hole 16g into which the shaft member 160c is rotatably inserted at a position corresponding to the shaft member 160c inserts the tip end portion of the hook 160d at a position corresponding to the hook 160d. Support holes 16h are formed respectively (see FIG. 10). In addition, the support 11b is formed with a support hole 16i in which the tip of the hook 160e is inserted and hooked at a position corresponding to the hook 160e as before. Therefore, the main body side cover 160 can swing around the shaft member 160c inserted into the circular hole 16g in a state in which the hook 160d, 160e and the support holes 16h, 16i are prevented from falling off. The shaft member 160c may be provided on the upper frame 16d side, and the circular hole 16g may be provided on the main body side cover 160 side.

  Further, as shown in FIGS. 7 to 10, a mounting hole 160 f as an engaging portion is formed in the front end portion of the main body side cover 160, and the front end portion of one optical system unit side cover 21 is engaged. A projection 21c as a joint portion is provided, and both covers 160, 21 are engaged via an engagement portion 22 configured by mounting the projection 21c in the mounting hole 160f. This engagement is released when the projection 21c is extracted from the mounting hole 160f. Note that 21 d in FIG. 8 is a front cover portion of the cover 21.

  Therefore, in the image forming apparatus 10 of the present embodiment, the height attached to the case 30 as the height adjustment unit 1 adjusts the height of the bottom surface 30a of the case 30 with respect to the bottom surface 16a of the upper frame 16d. The height of the system unit side cover 21 fluctuates, and the main body side cover 160 engaged with the cover 21 via the engaging portion 22 moves in the same direction as the inclination change of the optical system unit side cover 21. Oscillates around the position of the cover 160 and the position of the covers 160 and 21 is prevented from being displaced. Further, in the present embodiment, as described above, the leg portion 1A serving as a fulcrum when the posture of the optical system unit side cover 21 is changed is the axis of the shaft member 160c when the main body side cover 160 swings. Since the shaft member 160c is positioned on the same line as the fixed portion 1b as shown in FIG. 8, the covers 160 and 21 are always parallel regardless of the tilted state. As a result, the distance t between the stepped portion 160h on the upper edge of the main body side cover 160 and the lower end portion 21b of the optical system unit side cover 21 can be made uniform in the direction along the lower end portion 21b. At this time, as shown in FIG. 2, the main body side cover 160 has a longer horizontal portion 160a, a shorter vertical portion 160b, and a shaft member 160c at the intersection of the horizontal portion 160a and the vertical portion 160b. Therefore, the gap (position) between the vertical portion 160b and the cover (not shown) adjacent thereto is suppressed by suppressing the positional deviation between the horizontal portion 160a and the optical system unit side cover 21 on the upper side. Shift) can be made less noticeable.

  In the above-described embodiment, the optical system unit side cover 21 and the main body side cover 160 are configured to be continuously engaged. However, the present invention is not limited to this, and the optical system unit integrally including the optical system unit side cover 21. A configuration in which a portion other than the 20 optical system unit side covers 21 and the main body side cover 160 are engaged is also applicable. In the above-described embodiment, the mounting hole is used as the engaging portion, and the protrusion is used as the engaged portion. However, the present invention is not limited to this, and other engaging means and other engaged means are used. It is also possible.

  In the above-described embodiment, the height adjustment means is provided near the right surface of the right front portion, and the height adjustment is performed by tilting the front side with respect to the rear side. Not exclusively. For example, the present invention can be similarly applied to a configuration in which height adjustment means is provided near the front surface of the right front portion and height adjustment is performed such that the front side is inclined with respect to the rear side. Further, the present invention is not limited to the case where the front side is inclined with respect to the rear side, but is similarly applied to a configuration where the rear side is inclined with respect to the front side, a configuration where the right side is inclined with respect to the left side, and a configuration where the left side is inclined with respect to the right side. be able to.

  Furthermore, in the above-described embodiment, the image reading unit 16 is provided above the apparatus main body 11, and an in-body discharge tray that discharges paper is disposed in a space between the image reading unit 16 and the apparatus main body 11. Although applied to an image forming apparatus, the present invention is not limited to this. For example, the present invention can be similarly applied to an image forming apparatus in which the image reading apparatus is provided on the apparatus main body without a gap.

  Furthermore, in the embodiment described above, the present invention is applied to an image forming apparatus used as a copying machine, but the present invention is not limited to this. For example, the present invention can be similarly applied to an image forming apparatus used as a printer or a facsimile, or a printer or facsimile image forming apparatus also used as a copying machine.

1 is a front view showing an outline of an embodiment of an image forming apparatus according to the present invention. FIG. 2 is a perspective view showing an upper part of the image forming apparatus in FIG. 1. It is a perspective view which shows the structure of an image reading part. It is a disassembled perspective view which shows the structure of an image reading part. It is sectional drawing which shows the structure of a height adjustment means. It is a perspective view which shows the assembly structure of a height adjustment means. It is explanatory drawing (perspective view) of the engaging part of an optical system unit side cover and a main body side cover. It is the perspective view which looked at the engaging part of FIG. 7 from the back side. It is the exploded view which looked at the engaging part of Drawing 8 from the back side. It is a perspective view which expands and shows the engaging part of FIG. It is sectional drawing which shows the fitting state of an optical system unit side cover and a main body side cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Height adjustment means 2 Height adjustment member 3 Knob 4 Case support member 10 Image forming apparatus 11 Image forming apparatus main body 16 Image reading part 16d Upper frame 20 Optical system unit 21 Optical system unit side cover 21b Lower end part 22 Engagement part 30 Case 31 Contact glass 160 Body side cover 160c Shaft member 160g Upper edge portion 160h Stepped portion

Claims (2)

An image forming apparatus main body;
An upper frame provided on the upper side of the image forming apparatus main body for mounting an optical system unit for image reading;
Mounted on the upper frame via a height adjusting means, the height of one side is adjusted by the height adjusting means, and an optical system unit side cover that covers at least the side is integrally provided. The optical system unit;
A main body side cover that covers the side surface of the image forming apparatus main body and the side surface of the upper frame, and is provided so as to be swingable about an axis perpendicular to the side surface of the upper frame;
The optical system unit side cover and the main body side cover are adjacent to each other in the vertical direction, and the optical system unit side cover and the main body side cover are engaged, and the height adjustment unit adjusts the height of the optical system unit. Accordingly, the height of the cover on the optical system unit side fluctuates, and the main body side cover engaged with the cover on the optical system unit side swings following this, so that the positions of the two covers are displaced. An image forming apparatus characterized in that the image forming apparatus can suppress the above-described problem. The image forming apparatus according to claim 1.
The upper edge of the main body side cover is bent in a stepped shape on the inner side, and the lower edge of the optical system unit side cover is fitted outside the portion bent in a stepped shape on the inner side of the upper edge of the main body side cover. An image forming apparatus configured to be configured.

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