JP2015167291A - image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader which enables improvement of the efficiency of the assembly work while inhibiting deformation of a guide rail for guiding a scan part in a predetermined direction.SOLUTION: An image reader 100 includes: a housing 111; a scan part 114 which is disposed in the housing 111 and scans a script while moving in a predetermined direction; a resin guide rail 115 which is provided on an inner surface 111a of a bottom part of the housing 111 and guides the scan part 114 in the predetermined direction; and a long reinforcement member 116 extending in the predetermined direction and used for reinforcing the guide rail 115. The reinforcement member 116 is attached to an outer surface 111b of the bottom part of the housing 111 so as to be arranged along the guide rail 115. A center portion of the reinforcement member 116 that is viewed in the predetermined direction is fixed to the bottom part of the housing 111.

Description

  The present invention relates to an image reading apparatus that generates an image of an original by optically scanning an image, a document, or an object (hereinafter referred to as “original”).

  In the image reading apparatus, for example, a CIS (Contact Image Sensor) is used as an image sensor. An image reading apparatus using CIS (hereinafter referred to as “CIS scanner”) includes a line image sensor in which a plurality of light receiving elements are arranged in a housing. The CIS scanner optically scans a document by moving the line image sensor in a predetermined direction (scanning direction) substantially orthogonal to a direction in which a plurality of light receiving elements in the line image sensor are arranged (line direction).

  At this time, the line image sensor moves in the scanning direction along a guide rail provided at the bottom of the housing. That is, the guide rail guides the line image sensor in the scanning direction. Therefore, in order to stabilize the movement of the line image sensor, the guide rail is required not to be greatly deformed by heat or the like.

  Therefore, conventionally, a metal shaft having high rigidity is used as a guide rail (see, for example, Patent Document 1).

JP 2010-154186 A

  However, when the guide rail is made of metal, it is necessary to attach the guide rail to the bottom of the housing, and the efficiency of assembly work is reduced.

  Therefore, the present invention provides an image reading apparatus capable of improving the efficiency of assembly work while suppressing deformation of a guide rail that guides a scanning unit in a predetermined direction.

  An image reading apparatus according to an aspect of the present invention is provided in a housing, a scanning unit that is disposed in the housing and scans a document while moving in a predetermined direction, and is provided on an inner surface of a bottom portion of the housing. A resin guide rail that guides the portion in the predetermined direction, and a long reinforcing member that extends in the predetermined direction, the reinforcing member for reinforcing the guide rail, the reinforcing member, It is attached to the outer surface of the bottom part of a housing | casing along the said guide rail, and the center part in the said predetermined direction of the said reinforcement member is fixed to the bottom part of the said housing | casing.

  According to this configuration, a resin guide rail can be used. Therefore, the guide rail and the bottom portion of the housing can be provided integrally. If the guide rail and the bottom portion of the housing are molded integrally, the work for attaching the guide rail becomes unnecessary, and the efficiency of the assembly work can be improved.

  Moreover, according to this structure, the reinforcement member for reinforcing resin guide rails can be attached to the outer surface of the bottom part of a housing | casing. Therefore, deformation of the guide rail can be suppressed. Furthermore, since the reinforcing member can be attached from the outside of the casing, the efficiency of the assembly work can be improved as compared with the case where the reinforcing member is attached to the inner surface of the bottom of the casing.

  Furthermore, according to this structure, the center part of a reinforcement member can be fixed to the bottom part of a housing | casing. Therefore, deformation (for example, warpage) of the guide rail can be effectively suppressed.

  For example, the reinforcing member is arranged in parallel with the outer surface of the bottom portion of the casing, and extends from the first plate from a first plate-like portion extending in the predetermined direction and from one side of the first plate-like portion extending in the predetermined direction. A second plate-like portion extending in the predetermined direction provided in a direction crossing the shape-like portion, and a central portion of the first plate-like portion in the predetermined direction may be fixed to a bottom portion of the casing. Good.

  According to this configuration, the reinforcing member includes the first plate-like portion and the second plate-like portion provided in a direction intersecting the first plate-like portion from one side extending in a predetermined direction of the first plate-like portion. be able to. That is, the reinforcing member can have a bent portion extending in a predetermined direction. Therefore, the bending strength in the predetermined direction of the reinforcing member can be improved as compared with the case where the reinforcing member is a simple plate member. That is, even if the thickness of the plate-like portion of the reinforcing member is reduced, the deformation of the guide rail can be suppressed, and the manufacturing cost can be reduced.

  For example, the guide rail may protrude from the inner surface of the bottom portion of the casing, and the second plate-shaped portion may be inserted into a groove formed on the outer surface of the bottom portion of the casing by the guide rail.

  According to this structure, the 2nd plate-shaped part of a reinforcement member can be inserted in the groove | channel formed in the outer surface of the bottom part of a housing | casing with a guide rail. Therefore, it is possible to prevent the second plate-like portion of the reinforcing member from protruding outward from the housing, and it is possible to suppress the height of the image reading apparatus from being increased by the reinforcing member.

  For example, the reinforcing member includes a convex portion having a convex shape when viewed from a direction perpendicular to an outer surface of the bottom portion of the casing at a central portion in the predetermined direction of the reinforcing member, and is provided at the bottom portion of the casing. Is formed with a hole corresponding to the convex portion of the reinforcing member, and by fitting the convex portion of the reinforcing member into the hole portion of the housing, the central portion of the reinforcing member in the predetermined direction is The portion may be fixed to the bottom of the housing.

  According to this configuration, the central portion of the reinforcing member can be fixed to the bottom portion of the casing by fitting the convex portion provided in the central portion of the reinforcing member into the hole formed in the bottom portion of the casing. . Therefore, the height of the image reading apparatus can be reduced as compared with the case where the central portion of the reinforcing member is fixed to the bottom using screws.

  For example, the outer surface of the bottom portion of the housing may be formed with wall surfaces that respectively contact both end portions of the reinforcing member in the predetermined direction.

  According to this configuration, each of the both end portions of the reinforcing member can be brought into contact with the wall surface formed on the outer surface of the bottom portion of the housing. Therefore, the deformation of the reinforcing member can be suppressed by the wall surface.

  According to the image reading apparatus according to an aspect of the present invention, it is possible to improve the efficiency of the assembly work while suppressing the deformation of the guide rail that guides the scanning unit in a predetermined direction.

1 is a perspective view showing an external appearance of an image reading apparatus according to Embodiment 1. FIG. 3 is a plan view of an image reading unit of the image reading apparatus according to Embodiment 1. FIG. 3 is a perspective view of a bottom portion of a housing of the image reading apparatus according to Embodiment 1. FIG. 3 is a partial perspective view showing a cross section of a guide rail of the image reading apparatus according to Embodiment 1. FIG. 3 is a bottom view of the housing of the image reading apparatus according to Embodiment 1. FIG. 3 is a cross-sectional view of a mounting portion of a reinforcing member of the image reading apparatus according to Embodiment 1. FIG. 6 is a bottom view of a housing of an image reading apparatus according to Embodiment 2. FIG. 6 is a perspective view showing a cross section of a central portion of a reinforcing member of an image reading apparatus according to Embodiment 2. FIG. FIG. 10 is a perspective view showing a cross section of a central portion of a reinforcing member of an image reading apparatus according to a modification of the second embodiment. 6 is a bottom view of a housing of an image reading apparatus according to Embodiment 3. FIG. FIG. 10 is a perspective view in the vicinity of an end portion of a reinforcing member of an image reading apparatus according to Embodiment 3.

  Hereinafter, embodiments will be specifically described with reference to the drawings.

  It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the scope of the claims. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims are described as arbitrary constituent elements.

(Embodiment 1)
The image reading apparatus according to Embodiment 1 includes a reinforcing member for reinforcing a resin guide rail that guides the scanning unit in the scanning direction. The reinforcing member is attached to the outer surface of the bottom of the casing, and the central portion thereof is fixed to the bottom of the casing.

  The image reading apparatus according to Embodiment 1 will be specifically described below with reference to the drawings.

[Configuration of Image Reading Apparatus]
FIG. 1 is a perspective view showing an appearance of the image reading apparatus according to the first embodiment.

  The image reading apparatus 100 is a copier (Photocopier) or an MFP (Multi Function Product / Printer / Peripheral), and has a printing function in addition to an image reading function. Note that the image reading apparatus 100 does not necessarily have a printing function.

  As illustrated in FIG. 1, the image reading apparatus 100 includes an image reading unit 110, a printing unit 120, and an operation unit 130.

  The image reading unit 110 optically scans a document to generate a document image. Details of the configuration of the image reading unit 110 will be described later.

  The printing unit 120 prints the scan result (document image). Specifically, the printing unit 120 includes a paper feed cassette 121, an image forming unit 122, and a paper discharge tray 123. The paper stored in the paper feed cassette 121 is conveyed to the image forming unit 122. Then, the image forming unit 122 forms an image on the paper. The paper on which the image is formed is discharged to the paper discharge tray 123. Here, the paper is discharged onto the paper discharge tray 123 in a forward direction from a discharge port 124 formed on the back side of the image reading apparatus 100.

  For example, the image forming unit 122 forms an image on paper using a dry copying technique called xerography or electrophotography. In xerography, heat and pressure are applied to the paper to fix the toner to the paper. Therefore, the paper discharged to the paper discharge tray 123 becomes hot and may heat the bottom of the casing of the image reading unit 110. In such a case, it is necessary to prevent the guide rail provided at the bottom of the casing of the image reading unit 110 from being deformed by heat.

  The operation unit 130 includes, for example, a touch panel and a push button. The operation unit 130 receives a user operation (for example, an instruction to start scanning or copying a document).

[Configuration of Image Reading Unit]
FIG. 2 is a plan view of the image reading unit of the image reading apparatus according to the first embodiment. In FIG. 2, the cover member 113 is not shown. FIG. 3 is a perspective view of the bottom of the housing of the image reading apparatus according to the first embodiment. FIG. 4 is a partial perspective view showing a cross section of the guide rail of the image reading apparatus according to the first embodiment. FIG. 5 is a bottom view of the housing of the image reading apparatus according to the first embodiment. That is, FIG. 5 is a view of the bottom of the housing of the image reading apparatus according to the first embodiment as seen from below. FIG. 6 is a cross-sectional view of the attachment portion of the reinforcing member of the image reading apparatus according to the first embodiment. Specifically, FIG. 6 is a diagram showing an AA cross section of FIG.

  The image reading unit 110 includes a casing 111, a document table 112, a cover member 113, a scanning unit 114, a guide rail 115, and a reinforcing member 116.

  The housing 111 accommodates the scanning unit 114 and the like.

  The document table 112 is a transparent plate-like member fixed to the upper surface of the housing 111. The document table 112 closes an opening formed on the upper surface of the casing 111. For example, the document table 112 is platen glass.

  The cover member 113 is a member that closes the document table 112 so as to be freely opened and closed. Normally, the document is placed on the document table 112 with the cover member 113 opened, and the document placed on the document table 112 is scanned with the cover member 113 closed.

  The scanning unit 114 is arranged in the casing 111 and scans the document placed on the document table 112 while moving in the scanning direction (X-axis direction). Specifically, the scanning unit 114 receives reflected light from each position of the document while moving in the scanning direction, and outputs a signal corresponding to the intensity of the received reflected light. For example, the scanning unit 114 includes a light source, a line image sensor, a lens, and the like.

  The guide rail 115 is provided on the inner surface (upper surface) 111 a at the bottom of the housing 111. The guide rail 115 extends in the scanning direction, and guides the scanning unit 114 in the scanning direction. That is, the scanning unit 114 moves along the guide rail 115.

  In this embodiment, as shown in FIGS. 4 and 6, the guide rail 115 is provided integrally with the housing 111 and protrudes from the inner surface 111 a at the bottom of the housing 111. A groove 115 a is formed by a guide rail 115 on the outer surface (lower surface) 111 b at the bottom of the housing 111.

  The guide rail 115 is made of resin. Specifically, the material of the guide rail 115 is, for example, PS-HI (High impact polystyrene), ABS (Acrylonitrile butadiene styrene), PC + ABS (Polycarbonate / Acrylonitrile butadiene styrene).

  The reinforcing member 116 is a long member extending in the scanning direction, and is a member for reinforcing the guide rail 115. As shown in FIGS. 5 and 6, the reinforcing member 116 is attached to the outer surface 111 b at the bottom of the casing 111 along the guide rail 115.

  In the present embodiment, the central portion and both end portions in the scanning direction of the reinforcing member 116 are fixed to the bottom portion of the casing 111 by a fastening member 117 (for example, a screw). Here, the central portion does not need to be a portion that is strictly located at the center, and may be a portion that is substantially located at the center. Further, the both end portions do not have to be strictly located at the end edge, and may be any portion located near the end edge.

  Specifically, as shown in FIG. 6, the reinforcing member 116 has an L-shaped cross-sectional shape. That is, it has the 1st plate-shaped part 116a and the 2nd plate-shaped part 116b which cross | intersects the 1st plate-shaped part 116a perpendicularly | vertically.

  The first plate-like portion 116a is a rectangular plate-like portion extending in the scanning direction. The first plate-like portion 116 a is disposed in parallel with the outer surface 111 b of the bottom portion of the housing 111. In the first plate-like portion 116a, holes for inserting the fastening members 117 are formed in the center portion and both end portions in the scanning direction. The fastening member 117 passes through this hole and is inserted into the boss 118 protruding from the outer surface of the bottom portion of the casing 111.

  The second plate-like portion 116b is a rectangular plate-like portion extending in the scanning direction. The second plate-like portion 116b is provided in a direction intersecting the first plate-like portion 116a from one side extending in the scanning direction of the first plate-like portion 116a. Here, the second plate-like portion 116b intersects the first plate-like portion 116a perpendicularly.

  The reinforcing member 116 is a member having high strength, and is made of, for example, metal. Specifically, the reinforcing member 116 is made of, for example, an electrogalvanized steel plate. The reinforcing member 116 may be made of fiber-reinforced plastic (FRP) containing fibers (for example, glass fibers).

[effect]
As described above, according to the image reading apparatus according to the present embodiment, a resin guide rail can be used. Therefore, the guide rail and the bottom portion of the housing can be provided integrally. If the guide rail and the bottom portion of the housing are molded integrally, the work for attaching the guide rail becomes unnecessary, and the efficiency of the assembly work can be improved.

  Further, according to the image reading apparatus according to the present embodiment, the reinforcing member for reinforcing the resin guide rail can be attached to the outer surface of the bottom portion of the housing. Therefore, deformation of the guide rail can be suppressed. Furthermore, since the reinforcing member can be attached from the outside of the casing, the efficiency of the assembly work can be improved as compared with the case where the reinforcing member is attached to the inner surface of the bottom of the casing.

  Further, according to the image reading apparatus according to the present embodiment, the central portion of the reinforcing member can be fixed to the bottom of the housing. Therefore, deformation (for example, warpage) of the guide rail can be effectively suppressed.

  Further, according to the image reading apparatus according to the present embodiment, the reinforcing member is provided in a direction intersecting the first plate-like portion from the first plate-like portion and one side extending in a predetermined direction of the first plate-like portion. And a second plate-like portion. That is, the reinforcing member can have a bent portion extending in a predetermined direction. Therefore, the bending strength in the predetermined direction of the reinforcing member can be improved as compared with the case where the reinforcing member is a simple plate member. That is, even if the thickness of the plate-like portion of the reinforcing member is reduced, the deformation of the guide rail can be suppressed, and the manufacturing cost can be reduced.

(Embodiment 2)
Next, a second embodiment will be described. In the present embodiment, the means for fixing the central portion of the reinforcing member in the scanning direction to the bottom of the housing is different from that in the first embodiment. Hereinafter, the image reading apparatus according to the present embodiment will be specifically described with reference to the drawings, centering on differences from the first embodiment.

[Configuration of Image Reading Unit]
FIG. 7 is a bottom view of the housing of the image reading apparatus according to the second embodiment. FIG. 8A is a perspective view illustrating a cross-section of the central portion of the reinforcing member of the image reading apparatus according to Embodiment 2. Specifically, FIG. 8A is a perspective view showing a cross section of a portion B in FIG.

  The reinforcing member 216 of the image reading apparatus 200 according to the present embodiment is attached along the guide rail 215 to the outer surface 211b of the bottom portion of the casing 211 of the image reading apparatus 200, as in the first embodiment. The reinforcing member 216 has an L-shaped cross-sectional shape. That is, the reinforcing member 216 includes a first plate-like portion 216a and a second plate-like portion 216b provided in a direction intersecting the first plate-like portion 216a from one side extending in the scanning direction of the first plate-like portion 216a. Have.

  Similar to the first embodiment, the guide rail 215 is provided integrally with the housing 211 and protrudes from the inner surface 211 a of the bottom of the housing 211. The second plate-like portion 216 b is inserted into the groove 215 a formed on the outer surface 211 b of the bottom portion of the housing 211 by the guide rail 215.

  The reinforcing member 216 includes a convex portion 216c having a convex shape when viewed from a direction perpendicular to the outer surface of the bottom portion of the housing 211 at a central portion in the scanning direction. Specifically, the reinforcing member 216 includes a convex portion 216c at the center portion of the other side (side opposite to the side where the second plate-like portion 216b is provided) extending in the scanning direction of the first plate-like portion 216a.

  A hole 211c corresponding to the convex portion 216c of the reinforcing member 216 is formed at the bottom of the housing 211. Specifically, a gap (hole 211c) is formed between a part of the wall 211d protruding from the outer surface 211b at the bottom of the casing 211 and the outer surface 211b.

  By fitting the convex portion 216 c of the reinforcing member 216 into the hole 211 c of the housing 211, the central portion of the reinforcing member 216 is fixed to the bottom of the housing 211.

  Note that both ends of the reinforcing member 216 in the scanning direction are fixed to the bottom of the casing 211 by the fastening member 217 as in the first embodiment. However, since the position of the fastening member 217 is in the vicinity of the end of the guide rail 215, the fastening member 217 does not hinder the movement of the scanning unit even if the fastening member 217 protrudes into the housing 211. Therefore, in the present embodiment, the boss does not have to be formed on the outer surface 211b of the bottom portion of the housing 211 as in the first embodiment.

[effect]
As described above, according to the image reading apparatus of the present embodiment, the second plate-like portion of the reinforcing member can be inserted into the groove formed on the outer surface of the bottom portion of the housing by the guide rail. Therefore, it can prevent that the 2nd plate-shaped part of a reinforcement member protrudes to the outward of a housing | casing. As a result, it is possible to suppress the height of the image reading apparatus from being increased by the reinforcing member. Moreover, it can suppress that a reinforcement member obstructs taking-out of the paper on a paper discharge tray by a user. Furthermore, when the paper is discharged to the paper discharge tray, it is possible to reduce the occurrence of paper discharge failure due to the leading edge of the paper being caught by the reinforcing member.

  In addition, the 2nd plate-shaped part does not need to be inserted in the groove | channel formed in the outer surface of the bottom part of a housing | casing. For example, as shown in FIG. 8B, the reinforcing member 216 may be attached so that the second plate-like portion 216 b is away from the outer surface 211 b of the bottom portion of the housing 211. Even in this case, the reinforcing member can suppress the deformation of the guide rail.

  Further, according to the image reading apparatus according to the present embodiment, the central portion of the reinforcing member is fitted into the housing by fitting the convex portion provided in the central portion of the reinforcing member into the hole formed in the bottom portion of the housing. Can be fixed to the bottom of the body. Therefore, the height of the image reading apparatus can be reduced as compared with the case where the central portion of the reinforcing member is fixed to the bottom using screws. Moreover, it can suppress that the fastening member for fixing the center part of a reinforcement member to a bottom part obstructs taking-out of the paper on a paper discharge tray by a user. Further, when the paper is discharged to the paper discharge tray, it is possible to reduce the occurrence of paper discharge failure due to the leading edge of the paper being caught by the fastening member.

(Embodiment 3)
Next, Embodiment 3 will be described. The present embodiment is different from the second embodiment in that both end portions of the reinforcing member in the scanning direction are in contact with the wall surface of the housing. Hereinafter, the image reading apparatus according to the present embodiment will be specifically described with reference to the drawings, centering on differences from the second embodiment.

[Configuration of Image Reading Unit]
FIG. 9 is a bottom view of the housing of the image reading apparatus according to the third embodiment. FIG. 10 is a perspective view of the vicinity of the end portion of the reinforcing member of the image reading apparatus according to the third embodiment. Specifically, FIG. 10 is a perspective view of a portion C in FIG.

  On the outer surface 311b of the bottom of the housing 311 of the image reading apparatus 300 according to the present embodiment, wall surfaces 311e are formed to abut against both end portions in the scanning direction of the reinforcing member 216, respectively. Specifically, a wall surface 311e perpendicular to the outer surface 311b is formed in the housing 311. The reinforcing member 216 is attached so that both end portions in the scanning direction of the reinforcing member 216 are in contact with the wall surface 311e. Therefore, the movement of the reinforcing member 216 in the scanning direction is restricted by the wall surface 311e.

[effect]
As described above, according to the image reading apparatus according to the present embodiment, both end portions of the reinforcing member can be brought into contact with the wall surface formed on the outer surface of the bottom of the housing. Therefore, the deformation of the reinforcing member can be suppressed by the wall surface.

(Other embodiments)
The image reading apparatus according to the embodiment of the present invention has been described above, but the present invention is not limited to this embodiment. Unless it deviates from the meaning of the present invention, forms in which various modifications conceived by those skilled in the art have been made in this embodiment and forms constructed by combining components in different embodiments are also included in the scope of the present invention.

  For example, in each of the above embodiments, the guide rail is molded integrally with the bottom of the housing, but the guide rail may be a separate member from the bottom of the housing.

  Moreover, in each said embodiment, although the reinforcement member had L-shaped cross-sectional shape, it is not limited to this. For example, the reinforcing member may be a simple plate member. That is, the reinforcing member may not have the second plate-like portion. For example, the reinforcing member may have a T-shaped cross-sectional shape. For example, the reinforcing member may have a U-shaped cross-sectional shape.

  For example, the reinforcing member may have a U-shaped cross-sectional shape. That is, the reinforcing member is provided in the direction of crossing the first plate portion from the other side extending in the scan direction of the first plate portion in addition to the first plate portion and the second plate portion. You may provide the 3rd plate-shaped part extended in.

  Moreover, in each said embodiment, although the 2nd plate-shaped part intersected perpendicularly | vertically with respect to the 1st plate-shaped part, it is not limited to this. The first plate-like portion and the second plate-like portion may intersect at any angle.

  Moreover, in each said embodiment, although the hole was formed in the outer surface of the bottom part of a housing | casing with a plate-shaped member, a hole is not limited to this. For example, a recessed part may be provided in the outer surface of the bottom part of a housing | casing, and a hole part may be formed in the wall surface of the recessed part. That is, the hole portion may correspond to the convex portion of the reinforcing member.

  The image reading apparatus according to one embodiment of the present invention can be used as, for example, an image scanner and a copier.

100, 200, 300 Image reading device 110 Image reading unit 111, 211, 311 Housing 111a, 211a Inner surface 111b, 211b, 311b Outer surface 112 Document table 113 Cover member 114 Scan unit 115, 215 Guide rail 115a, 215a Groove 116, 216 Reinforcing member 116a, 216a First plate-like portion 116b, 216b Second plate-like portion 117, 217 Fastening member 118 Boss 120 Printing portion 121 Paper feed cassette 122 Image forming portion 123 Paper discharge tray 124 Discharge port 130 Operation portion 211c Hole portion 211d Wall part 216c Convex part 311e Wall surface

Claims (5)

A housing,
A scanning unit disposed in the housing and scanning a document while moving in a predetermined direction;
A resin guide rail provided on the inner surface of the bottom of the housing and guiding the scan unit in the predetermined direction;
A long reinforcing member extending in the predetermined direction, comprising a reinforcing member for reinforcing the guide rail;
The reinforcing member is attached to the outer surface of the bottom of the housing along the guide rail,
The image reading apparatus, wherein a central portion of the reinforcing member in the predetermined direction is fixed to a bottom portion of the casing. The reinforcing member is
A first plate-like portion disposed in parallel with the outer surface of the bottom of the housing and extending in the predetermined direction;
A second plate-like portion extending in the predetermined direction provided in a direction intersecting the first plate-like portion from one side extending in the predetermined direction of the first plate-like portion;
The image reading apparatus according to claim 1, wherein a central portion of the first plate-like portion in the predetermined direction is fixed to a bottom portion of the housing. The guide rail protrudes from the inner surface of the bottom of the housing,
The image reading apparatus according to claim 2, wherein the second plate-like portion is inserted into a groove formed on the outer surface of the bottom portion of the housing by the guide rail. The reinforcing member includes a convex portion having a convex shape when viewed from a direction perpendicular to the outer surface of the bottom portion of the casing at a central portion in the predetermined direction of the reinforcing member.
A hole corresponding to the convex portion of the reinforcing member is formed at the bottom of the housing.
The center part in the said predetermined direction of the said reinforcing member is fixed to the bottom part of the said housing | casing by fitting the said convex part of the said reinforcing member in the said hole part of the said housing | casing. 2. An image reading apparatus according to item 1. 5. The image reading apparatus according to claim 1, wherein wall surfaces that respectively contact both end portions of the reinforcing member in the predetermined direction are formed on the outer surface of the bottom portion of the housing.

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