JP6204325B2 - Support structure for image scanning unit and image forming apparatus - Google Patents

Description

  The present invention relates to an image scanning unit support structure and an image forming apparatus including the same.

  Generally, in an image forming apparatus, it is known that a discharge tray on which a sheet on which an image is formed is discharged is formed on an upper surface of a main body including an image forming unit. Further, an image forming apparatus is also known in which an image scanning unit and the main body are arranged vertically. The image scanning unit includes an image scanning unit that scans an image of a document and a metal housing that houses the image scanning unit.

  In the image forming apparatus, two metal support members supported by the main body support the left and right side portions of the image scanning unit. One of the two support members is supported in a cantilevered manner at the back side in the depth direction of the main body, and the other is supported in a cantilevered manner at each of the back side and the near side of the main body. .

  By adopting the support member that is supported in a cantilever manner, the discharge tray can be accessed in a range extending in two directions from the front side and from the left and right sides.

  Further, in the image forming apparatus, a convex portion formed on one side of the support member supported in the form of both ends and the housing of the image scanning unit and a concave portion formed on the other fit in the vertical direction. The structure is also known (for example, refer to Patent Document 1). Thereby, the tolerance of the support portion of the image scanning unit against a horizontal impact is improved.

JP 2007-293216 A

  By the way, as a method of forming the convex portions for fitting on the metal casing or the support member, pin welding, embossing, burring, or the like can be considered. However, it is difficult to form the convex portions with sufficient strength with high dimensional accuracy by metal processing.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image scanning unit support structure and an image forming apparatus including the same, which can increase the resistance of the support portion of the image scanning unit against a horizontal impact without impairing dimensional accuracy. .

  An image scanning unit support structure according to one aspect of the present invention is a structure that supports an image scanning unit including a metal housing that houses an image scanning unit that scans an image of a document. The support structure includes a first support member, an interposition member, and a second support member. The first support member is a metal member that is supported in a cantilever manner at a portion on one end side in the first direction in the main body of the image forming apparatus. The first support member supports a portion on a first end side in a second direction orthogonal to the first direction in the housing in a state of being connected to the housing. The interposition member stands on the first surface side and is fitted into a first hole formed in a second end side portion of the bottom plate portion of the housing in the second direction and the first surface. It is a member in which the 2nd convex part which stands up on the 2nd surface side opposite side is formed. The interposition member supports the first end side portion of the casing in a state of being connected to each of the upper casing and the lower member. The second support member is a metal member that is supported by at least portions on both sides of the main body portion in the first direction. The second support member is a member in which a second hole into which the second convex portion of the interposition member is inserted is formed. The second support member supports a portion of the bottom plate portion of the housing on the second end side in the second direction through the interposition member in a state of being connected to the interposition member.

  An image forming apparatus according to another aspect of the present invention includes the image scanning unit, a support structure for the image scanning unit according to one aspect of the present invention, and the main body. The main body supports the image scanning unit via a support structure for the image scanning unit.

  ADVANTAGE OF THE INVENTION According to this invention, the tolerance of the support part of an image scanning unit with respect to the impact of a horizontal direction can be improved, and it becomes possible to provide the support structure of an image scanning unit with high dimensional accuracy, and an image forming apparatus provided with the same. .

FIG. 1 is a configuration diagram of an image forming apparatus including an image scanning unit support structure according to an embodiment of the present invention. FIG. 2 is a perspective view of the image scanning unit support structure according to the embodiment of the present invention. FIG. 3 is a first perspective view of the first interposed member in the image scanning unit support structure according to the embodiment of the present invention. FIG. 4 is a second perspective view of the first interposed member in the image scanning unit support structure according to the embodiment of the present invention. FIG. 5 is a first perspective view of the second interposed member and the height adjusting member in the image scanning unit support structure according to the embodiment of the present invention. FIG. 6 is a second perspective view of the second interposed member and the height adjusting member in the image scanning unit support structure according to the embodiment of the present invention. FIG. 7 is a first cross-sectional view of the second interposed member and the height adjusting member in the image scanning unit support structure according to the embodiment of the present invention. FIG. 8 is a second cross-sectional view of the second interposed member and the height adjusting member in the image scanning unit support structure according to the embodiment of the present invention. FIG. 9 is a third cross-sectional view of the second interposed member and the height adjusting member in the image scanning unit support structure according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following embodiment is an example which actualized this invention, Comprising: It does not have the character which limits the technical scope of this invention.

[Configuration of Image Forming Apparatus]
First, the configuration of the image forming apparatus 10 including the image scanning unit support structure 7 according to the embodiment will be described with reference to FIGS. Hereinafter, the image scanning unit support structure 7 is abbreviated as a unit support structure 7.

  The image forming apparatus 10 includes a main body 100 and the image reading apparatus 1. The main body unit 100 includes a sheet supply unit 2, a sheet conveyance unit 3, an image forming unit 4, an optical scanning unit 5, a fixing unit 6, and main body frames 101 and 102.

  For example, the image forming apparatus 10 is a copying machine, a printer or a facsimile machine having a copying machine function, or a multifunction machine having a plurality of image processing functions including an image reading function.

  The image reading apparatus 1 includes an image scanning unit 11 and a document table cover 12. The image scanning unit 11 includes a transparent document table 13, an image scanning unit 14, and a housing 15. An ADF (Auto Document Feeder) 120 is incorporated in the document table cover 12.

  The image scanning unit 11 is accommodated in a metal casing 15. For example, the housing 15 is a member obtained by bending a metal plate mainly composed of iron or steel.

  The document table 13 is a transparent member on which a document 90 that is an image reading object is placed. Generally, the document table 13 is called platen glass. The document table cover 12 is supported with respect to the housing 15 so as to be rotatable between a closed position that covers the document table 13 and an open position that releases the document table 13.

  The image scanning unit 14 includes a moving unit 141 including a light emitting unit 142, an optical system 143 such as a mirror and a lens, an image sensor 144, and the like. In the following description, the one direction in the horizontal plane and the direction orthogonal thereto are referred to as a first direction R1 and a second direction R2, respectively.

  In the present embodiment, the first direction R <b> 1 is the depth direction of the image forming apparatus 10, and is also the main scanning direction in scanning the document 90. The second direction R <b> 2 is the width direction of the image forming apparatus 10, and is also the sub-scanning direction in scanning the document 90.

  The light emitting unit 142 irradiates the band-shaped light along the first direction R <b> 1 toward the document 90 placed on the transparent document table 13. The optical system 143 includes a mirror and a lens that guide emitted light from the linear region along the first direction R <b> 1 on the document table 13 to the light receiving unit of the image sensor 144. When the document 90 is placed on the document table 13, the light emitted from the linear region on the document table 13 includes the reflected light of the light emitting unit 142 irradiated on the document 90.

  The image sensor 144 is a sensor that detects the amount of light emitted from the linear region on the document table 13 for each pixel and outputs the detected light amount data of each pixel as image data. For example, it is conceivable that the image sensor 144 is a CCD (Charge Coupled Device) 144.

  The moving unit 141 supports a part of the light emitting unit 142 and the optical system 143 and moves along the second direction R2. As a result, the position in the second direction R <b> 2 of the linear region that is a target of light irradiation by the light emitting unit 142 and light amount detection by the image sensor 144 changes. As the moving unit 141 moves along the second direction R2, the image scanning unit 14 scans the image on the document table 13.

  Note that a contact image sensor (CIS) in which the light emitting unit 142, the image sensor 144, and the lens are integrated may be employed in the image scanning unit 14. In this case, the contact image sensor is supported by the moving unit 141.

  The ADF 120 conveys the document 90 set on the document tray 121 to the document discharge tray 123 via the image reading position by a plurality of rotating conveyance rollers 122. At this time, the image scanning unit 14 reads an image of the document 90 in a state where the moving unit 141 is stopped at the image reading position.

  The image forming unit 4 forms an image corresponding to the image data string output from the image reading device 1 on the recording sheet 9. The recording sheet 9 is a sheet-like image forming medium such as paper, coated paper, postcard, envelope, and OHP sheet.

  The image forming apparatus 10 includes a sheet supply unit 2, a sheet conveying unit 3, an image forming unit 4, an optical scanning unit 5, a fixing unit 6, and the like. An image forming apparatus 10 shown in FIG. 1 is an electrophotographic image forming apparatus.

  In the sheet supply unit 2, the sheet delivery roller 22 sends the recording sheet 9 from the sheet storage unit 21 to the sheet conveyance path 30.

  Further, in the sheet conveyance unit 3, the registration roller 31 and the sheet conveyance roller 32 convey the recording sheet 9 along the sheet conveyance path 30. Further, the discharge roller 33 discharges the recording sheet 9 after image formation from the outlet 304 of the sheet conveyance path 30 onto the discharge tray 1000.

  The image forming unit 4 forms an image on the surface of the recording sheet 9 moving on the sheet conveyance path 30. The image forming unit 4 includes a drum-shaped photoreceptor 41, a charging unit 42, a developing unit 43, a transfer unit 45, a cleaning unit 47, and the like. The photoconductor 41 is an example of an image carrier.

  The photoconductor 41 rotates, and the charging unit 42 uniformly charges the surface of the photoconductor 41. Further, an electrostatic latent image is written on the surface of the photoreceptor 41 charged by the optical scanning unit 5 scanning the laser beam. Further, the developing unit 43 supplies the developer to the photosensitive member 41 to develop the electrostatic latent image into the image of the developer. The developer is supplied to the developing unit 43 from a developer supply unit (not shown).

  Further, the transfer unit 45 transfers the developer image on the surface of the photosensitive member 41 to the recording sheet 9 moving on the sheet conveyance path 30. Further, the cleaning unit 47 removes the developer remaining on the surface of the photoreceptor 41. Further, the fixing unit 6 heats an image that is an image of the developer on the recording sheet 9 in the sheet conveyance path 30, and fixes the image on the recording sheet 9.

  In the image forming apparatus 10, a discharge tray 1000 from which the recording sheet 9 on which an image is formed is discharged is formed on the upper surface of the main body unit 100 including the image forming unit 4. The image scanning unit 11 and the main body unit 100 are arranged vertically. Therefore, a space is formed between the discharge tray 1000 and the image scanning unit 11.

  As shown in FIG. 2, the casing 15 of the image scanning unit 11 is supported by metal body frames 101 and 102. For example, the main body frames 101 and 102 are metal members mainly composed of iron or steel. The main body frames 101 and 102 are part of a structure that supports the image forming unit 4 and the like in the main body unit 100.

  In FIG. 2, portions other than the bottom plate 150 in the housing 15 of the image scanning unit 11 are drawn with imaginary lines (two-dot chain lines).

  In the following description, of the main body frames 101 and 102, a portion located on one end side in the first direction R1 in the main body portion 100 is referred to as a first main body frame 101, and a portion located on the other end side is referred to as a second main body frame. Called. In the present embodiment, the first main body frame 101 is located on the back side of the main body 100, and the second main body frame 102 is located on the front side of the main body 100.

  The image forming apparatus 10 includes a first metal support member 71 supported by the first main body frame 101 and a second metal support member 72 supported by the first main body frame 101 and the second main body frame 102. Prepare.

  The first support member 71 is supported in a cantilevered manner at a portion on one end side in the first direction R <b> 1 in the main body 100. On the other hand, the second support member 72 is supported by at least portions on both ends of the main body 100 in the first direction R1. In the example shown in FIG. 2, the second support member 72 is supported in a cantilevered manner at portions on both ends of the main body 100 in the first direction R <b> 1. In the present embodiment, both ends of the main body 100 in the first direction R1 are a back surface and a front surface.

  In the example shown in FIG. 2, the first support member 71 is formed by extending upward from a portion fixed to the first main body frame 101, and further extending along the first direction R <b> 1 therefrom. And have a part. The second support member 72 is a metal plate bent into a rectangular tube shape.

  For example, the first support member 71 is fixed to the first main body frame 101 with screws 78. Similarly, the second support member 72 is fixed to the first main body frame 101 and the second main body frame 102 by screws (not shown).

  The unit support structure 7 is a structure that supports the image scanning unit 11 including an image scanning unit 11 that scans an image of the document 90 and a metal housing 15 that accommodates the image scanning unit 11. The unit support structure 7 includes a first support member 71 and a second support member 72. The unit support structure 7 supports the image scanning unit 11 above the main body 100.

  The first support member 71 supports a portion of the housing 15 on the first end side in the second direction R2. The first support member 71 supports the bottom plate portion 150 of the housing 15 in a state of being connected to the housing 15. In the example shown in FIG. 2, the first support member 71 is connected to the housing 15 by a screw 77. On the other hand, the second support member 72 supports a portion of the housing 15 on the second end side in the second direction R2. In the present embodiment, the first end and the second end in the second direction R2 are a left end and a right end as viewed from the front side of the image forming apparatus 10, respectively.

  By adopting the first support member 71 that is supported in a cantilever manner, it is possible to access the discharge tray 1000 in a range extending in two directions from the front side and from one of the left and right sides.

  The first support member 71 is more likely to swing when subjected to an impact than the second support member 72 supported in a doubly supported manner. Therefore, in order to increase the resistance of the support of the image scanning unit 11 to impact, it is necessary for the second support member 72 to hold the image scanning unit 11 firmly.

  In the image forming apparatus 10, the convex portion formed on one of the second support member 72 supported in a doubly supported manner and the casing 15 of the image scanning unit 11 and the concave portion formed on the other fit in the vertical direction. It is conceivable to adopt a structure. Thereby, the tolerance of the support portion of the image scanning unit 11 against the impact in the horizontal direction is improved.

  By the way, as a method of forming the projections for fitting on the metal casing 15 or the second support member 72, welding of a pin, embossing, burring, or the like can be considered. However, it is difficult to form the convex portions with sufficient strength with high dimensional accuracy by metal processing.

[Image scanning unit support structure]
On the other hand, if the unit support structure 7 is employed, the resistance of the support portion of the image scanning unit 11 against the impact in the horizontal direction can be increased without impairing the dimensional accuracy. Hereinafter, the unit support structure 7 will be described with reference to FIGS.

  The unit support structure 7 is a structure that supports the image scanning unit 11. The main body 100 supports the image scanning unit 11 via the unit support structure 7. The unit support structure 7 includes a first support member 71, a second support member 72, and an interposition member 73. Furthermore, the unit support structure 7 in the present embodiment also includes a height adjusting member 74.

  It is conceivable that the interposition member 73 and the height adjusting member 74 are synthetic resin molded members. For example, it is conceivable that the interposition member 73 and the height adjustment member 74 are relatively hard synthetic resin members mainly composed of polyamide, acrylonitrile / butadiene / styrene or polyacetal.

  The interposition member 73 is a member that is sandwiched between the bottom plate portion 150 of the casing 15 of the image scanning unit 11 and the second support member 72. The housing 15 and the second support member 72 are connected via an interposed member 73.

  The unit support structure 7 includes two interposed members 73. One and the other of the two interposed members 73 are referred to as a first interposed member 73A and a second interposed member 73B, respectively. The first interposed member 73A and the second interposed member 73B are arranged at one end side position and the other end side position in the first direction R1, respectively.

  3 and 4 are perspective views of the first interposed member 73A as viewed from the opposite side. 5 and 6 are perspective views of the second interposed member 73B as viewed from the opposite side.

  FIG. 7 is a cross-sectional view of the housing 15, the second interposed member 73 </ b> B, and the second support member 72 in a state before the second interposed member 73 </ b> B is combined with the second support member 72. FIG. 8 is a cross-sectional view of the housing 15, the second interposed member 73 </ b> B, and the second support member 72 in a state where the second interposed member 73 </ b> B is combined with the second support member 72. FIG. 9 shows a cross-sectional view of the housing 15, the second interposed member 73 </ b> B, the second support member 72, and the height adjusting member 74.

  As shown in FIG. 2, a first fitting hole 151 and a first screw hole 152, which are through holes, are formed in the bottom plate portion 150 of the housing 15. Further, as shown in FIG. 7, the top plate portion 720 of the second support member 72 is formed with a second fitting hole 721 that is a through hole. Further, the second support member 72 is also formed with a second screw hole 722 which is a through hole.

  First, the structure of the interposed member 73, which is a structure common to the first interposed member 73A and the second interposed member 73B, will be described. The interposition member 73 is a member independent of the housing 15 and the second support member 72.

  The interposition member 73 includes a base 730, a first protrusion 731, a first connection part 732, a second protrusion 733, and a second connection part 734. The base portion 730 is a portion that is sandwiched between the bottom plate portion 150 of the housing 15 and the second support member 72. Hereinafter, the surface of the base portion 730 facing the bottom plate portion 150 of the housing 15 is referred to as a first surface 7301. In addition, a surface of the base portion 730 facing the second support member 72, that is, a surface opposite to the first surface 7301 is referred to as a second surface 7302.

  As shown in FIGS. 3, 5, and 7, the first convex portion 731 is a portion that is formed upright on the first surface 7301 side of the base portion 730. The first convex portion 731 is a columnar convex portion that is fitted into the first fitting hole 151 in the bottom plate portion 150 of the housing 15. The first fitting hole 151 is formed in the second end side portion in the second direction R2. The first fitting hole 151 is an example of the first hole.

  As shown in FIGS. 4, 6, and 7, the second convex portion 733 is a portion formed upright on the second surface 7302 side of the base portion 730. The second convex portion 733 is a portion that is fitted into the second fitting hole 721 in the second support member 72 on the lower side of the base portion 730. The second fitting hole 721 is an example of the second hole.

  The first connecting part 732 is a part connected to the housing 15. 3-7, the 1st connection part 732 is a part in which the through-hole by which the screw | thread 75 for a connection is passed was formed. The interposition member 73 and the housing 15 are firmly connected by a screw 75 passed through the hole of the first connecting part 732 and the first screw hole 152 of the bottom plate part 150.

  In the present embodiment, each of the first interposed member 73 </ b> A and the second interposed member 73 </ b> B has two first convex portions 731 and two first connecting portions 732. In each of the first interposed member 73A and the second interposed member 73B, the first connecting portion 732 is formed on the base portion 730.

  The second connecting part 734 is a part that is connected to the second support member 72. In the example shown in FIGS. 4, 5, and 7, the second connecting portion 734 is a portion in which a through hole through which the connecting screw 76 is passed is formed. The interposition member 73 and the second support member 72 are firmly connected by a screw 76 that is passed through the hole of the second connection portion 734 and the second screw hole 722 of the second support member 72.

  In the present embodiment, the first interposed member 73A has one second convex portion 733 and two second connecting portions 734. The second connecting portion 734 of the first interposed member 73 </ b> A is formed on a hanging wall portion 739 formed to extend downward from the base portion 730 and is connected to the side surface of the second support member 72.

  Further, the second interposed member 73B has one second convex portion 733 and one second connecting portion 734. The second connecting portion 734 of the second interposed member 73 </ b> B is formed on the base portion 730 and is connected to the top plate portion 720 of the second support member 72.

  The interposition member 73 is connected to each of the upper casing 15 and the lower second support member 72, and is disposed on the second end side in the second direction R <b> 2 in the bottom plate portion 150 of the casing 15. Support the part. Further, the second support member 72 supports the portion on the second end side in the second direction R <b> 2 of the bottom plate portion 150 of the housing 15 through the interposition member 73 in a state where the second support member 72 is connected to the interposition member 73.

  In the unit support structure 7, the first convex portion 731 and the second convex portion 733 of the interposition member 73 are fitted in the first fitting hole 151 of the housing 15 and the second fitting hole 721 of the second support member 72. . Therefore, the interposition member 73 limits the horizontal displacement of the image scanning unit 11 with respect to the second support member 72. As a result, the resistance of the support portion of the image scanning unit 11 against the impact in the horizontal direction is improved.

  Further, the interposition member 73 separate from the casing 15 and the second support member 72 can be easily mass-produced with high dimensional accuracy by molding using a mold. Therefore, if the unit support structure 7 is employed, the resistance of the support portion of the image scanning unit 11 against the impact in the horizontal direction can be increased without impairing the dimensional accuracy.

  Further, the interposition member 73 can be attached to the housing 15 of the image scanning unit 11 in advance before the image scanning unit 11 is assembled to the main body 100. For example, it is conceivable that the interposition member 73 is connected to the housing 15 in the assembly process of the image scanning unit 11 or the like.

  FIG. 7 shows a state in which the interposition member 73 is attached to the housing 15 in advance. FIG. 8 shows a state where the second protrusion 733 of the interposition member 73 attached to the housing 15 is inserted into the second fitting hole 721 of the second support member 72. FIG. 9 shows a state in which the interposition member 73 is connected to the second support member 72.

  When the interposition member 73 is connected to the housing 15, the first fitting hole 151 and the first screw hole 152 formed in the housing 15 are closed by the interposition member 73 and the screw 75. Therefore, if the interposition member 73 is connected to the housing 15 in advance, foreign matter enters the housing 15 through the first fitting hole 151 or the first screw hole 152 when the image scanning unit 11 is transported and stored. Can be prevented.

[Height adjustment member]
Next, the height adjusting member 74 will be described with reference to FIGS. The height adjustment member 74 is a member that is sandwiched between the second interposed member 73 </ b> B and the second support member 72. The second interposition member 73B is one of the two interposition members 73A and 73B arranged with a gap in the first direction R1.

  At least one of the height adjusting member 74 and the second interposed member 73B above the height adjusting member 74 is a plurality of height adjusting contact surfaces formed at different heights along the first direction R1 along the horizontal plane. Is formed. The contact surface for height adjustment is a surface in contact with the mating member. In this case, when the height adjusting member 74 is slid along the first direction R1, the height adjusting contact surface in contact with the specific surface of the counterpart member is selectively changed.

  In the present embodiment, a plurality of first height adjustment surfaces 741 formed in a step shape are formed on the upper surface side of the height adjustment member 74. Furthermore, a plurality of second height adjustment surfaces 735 formed in a step shape are also formed on the second surface 7302 side of the second interposed member 73B.

  The first height adjustment surface 741 and the second height adjustment surface 735 are surfaces that are in contact with each other. For example, each of the first height adjustment surface 741 and the second height adjustment surface 735 is a flat surface along the horizontal direction.

  As shown in FIGS. 8 and 9, the height adjusting member 74 is inserted between the second interposed member 73B and the second support member 72 along the first direction R1. When the position of the height adjustment member 74 in the first direction R1 is different, the combination of the first height adjustment surface 741 and the second height adjustment surface 735 in contact with the first height adjustment surface 741 is different.

  In other words, when the height adjustment member 74 is slid along the first direction R1, the first height adjustment surface 741 in contact with the specific second height adjustment surface 735 is selectively changed. Accordingly, when the height adjusting member 74 is slid along the first direction R1, the height at which the second interposed member 73B supports the housing 15 changes.

  By adjusting the position of the height adjusting member 74 in the first direction R1, the height at which the second interposed member 73B supports the housing 15 can be adjusted. Thereby, the level of the image scanning unit 11 can be adjusted.

  Further, the height adjusting member 74 is formed with a long hole 742 through which a screw 76 for connecting the second interposed member 73B to the second support member 72 is passed. The long hole 742 is formed along the first direction R1. Thereby, as long as the height adjustment member 74 exists within the predetermined adjustment range in the first direction R1, the second interposed member 73B and the height adjustment member 74 are fixed to the second support member 72 by one screw 76. can do.

[Application example]
In the unit support structure 7 shown above, it is conceivable that the first interposed member 73A is adopted instead of the second interposed member 73B, that is, two first interposed members 73A are adopted.

  It is also conceivable that the second interposed member 73B is adopted instead of the first interposed member 73A, that is, two second interposed members 73B are adopted.

  The support structure of the image scanning unit and the image forming apparatus according to the present invention can be freely combined within the scope of the invention described in each claim, or the embodiments and application examples described above can be freely combined. It is also possible to configure the application example by appropriately modifying or omitting a part thereof.

1: Image reading device 2: Sheet feeding unit 3: Sheet conveying unit 4: Image forming unit 5: Optical scanning unit 6: Fixing unit 7: Image scanning unit support structure (unit support structure)
9: Recording sheet 10: Image forming apparatus 11: Image scanning unit 12: Document table cover 13: Document table 14: Image scanning unit 15: Housing 21: Sheet storage unit 22: Sheet feeding roller 30: Sheet conveyance path 31: Registration Roller 32: Sheet conveyance roller 33: Discharge roller 41: Photoconductor 42: Charging unit 43: Development unit 45: Transfer unit 47: Cleaning unit 71: First support member 72: Second support member 73: Intervening member 73A: First Interposing member 73B: second interposing member 74: height adjusting members 75, 76, 77, 78: screw 90: original 100: main body 101: first main body frame 102: second main body frame 121: original tray 122: transport roller 123: Document discharge tray 141: Moving unit 142: Light emitting unit 143: Optical system 144: Image sensor 50: housing of the bottom plate portion 151: first fitting hole (first hole)
152: 1st screw hole 304: Outlet 720: Top plate part 721: 2nd fitting hole (2nd hole)
722: second screw hole 730: base portion 731: first convex portion 732: first connecting portion 733: second convex portion 734: second connecting portion 735: second height adjusting surface 739: drooping wall portion 741: first Height adjustment surface 742: slot 1000: discharge tray 7301: first surface 7302: second surface

Claims (4)

A support structure of an image scanning unit including a metal casing that houses an image scanning unit that scans an image of a document,
A first end in a second direction orthogonal to the first direction in the casing in a state where the main body of the image forming apparatus is supported in a cantilevered manner at a portion on one end side in the first direction. A metal first support member for supporting the side portion;
A first protrusion that stands on the first surface side and is fitted into a first hole formed in a second end side portion of the bottom plate portion of the housing in the second direction, and a first projection opposite to the first surface side. A second convex part standing on the second surface side is formed, and an interposition member connected to each of the upper casing and the lower member;
A state in which the second hole in which the second convex portion of the interposition member is fitted is formed and is supported by at least portions on both sides in the first direction in the main body portion, and is connected to the interposition member And a metal second support member that supports the second end side portion of the bottom plate portion of the housing in the second direction through the interposition member. A height adjusting member that is sandwiched between one of the two interposed members disposed at an interval in the first direction and the second supporting member;
At least one of the height adjustment member and the interposition member above the plurality of height adjustment contact surfaces that are formed at different heights along one direction along the horizontal plane and are in contact with the mating member The support structure for an image scanning unit according to claim 1, wherein:   The support structure for an image scanning unit according to claim 1, wherein the interposition member is a synthetic resin molding member. An image scanning unit including a housing that houses an image scanning unit that scans an image of a document;
A support structure for an image scanning unit according to any one of claims 1 to 3,
A main body that supports the image scanning unit via a support structure of the image scanning unit.

Images