JP4208692B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus that reads an image of a document by being used alone as a scanner or mounted on a copying machine, a facsimile, or the like.

  In general, an image reading apparatus irradiates a document with light, reflects the reflected light through a plurality of mirrors, guides it to a reading device such as a CCD through a condenser lens, and the reading device converts an image of the document to an electrical signal. As to get (read).

  Here, in such an image reading apparatus, when the apparatus is transported, the optical system moving unit provided in the image reading apparatus may be vigorously shaken or vibrated and deformed or damaged.

Therefore, in order to avoid the above inconvenience, an image reading apparatus having a structure for fixing the optical system moving unit to the apparatus main body has been proposed. In this image reading apparatus, the fixing member for fixing the optical system moving unit to the outer cover and the insertion hole formed in the internal housing so as to be substantially parallel to the moving direction of the optical system moving unit Is inserted from the outside of the apparatus main body, and the fixing member is screwed into a screw hole formed in the optical system moving unit so as to be substantially parallel to the moving direction of the optical system moving unit. The system moving unit is fixed to the apparatus main body (see, for example, Patent Document 1).
Japanese Examined Patent Publication No. 7-104558 (Page 2-3, Figure 2-4)

  However, in the conventional image reading apparatus, although movement of the optical system moving unit during transportation can be restricted and damage and deformation of the optical system moving unit and its peripheral parts can be prevented, as described above, the exterior Since the insertion hole formed in the cover and the inner housing is formed to be substantially parallel to the moving direction of the optical system moving unit, the fixing member is removed to release the fixed state of the optical system moving unit, When using an image reading device, dust, dust, and the like from the outside easily enter the internal housing via the insertion hole, and as a result, the dust is placed on each mirror included in the optical system moving unit. As a result, there is a disadvantage that the image is deteriorated due to adhesion of dust and the like.

  Therefore, the present invention has been made in view of the above problems, and prevents entry of dust and dirt into the internal housing, and prevents adhesion of dust and dirt to each mirror provided in the optical system moving unit. Another object of the present invention is to provide an image reading apparatus capable of preventing image deterioration.

In order to achieve the above object, an image reading apparatus according to a first aspect of the present invention includes an optical system moving unit that holds a mirror that further reflects light reflected from a document, an exterior cover of the apparatus body, and an internal housing of the apparatus body. A fixing member for fixing the optical system moving unit is inserted into holes formed in each of the optical system moving unit, the exterior cover, and the inner housing, and the fixing member is inserted into the optical system. In the image reading apparatus that fixes the optical system moving unit to the image reading apparatus main body by being attached to the moving unit, the outer cover is provided with a cover member for closing a hole formed in the outer cover. , the fixed member and the cover member is moved in a predetermined direction together, the cover member to be rotated and inserted into a hole formed in the exterior cover The cover member is detachable from the hole formed in the exterior cover, and the fixing member is rotated in conjunction with the rotation of the cover member, so that the cover member and the fixing member are integrated. The groove is formed in the fixing member, and a protrusion and a collar are formed in the cover member, and the protrusion is fitted into the groove. The fixing member is rotatable in conjunction with the rotation of the cover member, the movement of the cover member in the predetermined direction is restricted, and a protrusion formed by a part of the exterior cover is provided. , the protrusion and the flange portion is engaged match and said Rukoto.

According to a second aspect of the present invention, in the image reading apparatus, the cover member is provided with a rotation member that is rotatably supported by the cover member main body, and is interlocked with the rotation of the rotation member. When the fixing member rotates, the cover member and the fixing member move together in a predetermined direction, and the fixing member has a groove, and the rotating member has a protrusion and A groove for rotation is formed on the surface, and when the protrusion is fitted into the groove of the fixing member, a rotating tool is inserted into the groove of the rotating member and rotated. It said fixing member and said Rukoto Do rotatable in conjunction with the rotation.

  According to the present invention, since the cover member for closing the hole formed in the exterior cover is provided on the exterior cover, it is possible to completely prevent dust and dirt from entering the exterior cover and the internal housing. This makes it possible to prevent the dust, dust, and the like from adhering to the mirror provided in the optical movement unit, and as a result, it is possible to reliably prevent image deterioration.

  Further, according to the present invention, the cover member and the fixing member are integrally moved in a predetermined direction, so that the fixing member attached to the optical system moving unit can be removed with a simple configuration.

  Further, according to the present invention, the cover member is provided with the rotation member that is rotatably supported by the cover member body, and the fixing member rotates in conjunction with the rotation of the rotation member. By this, since the cover member and the fixing member move integrally in a predetermined direction, it becomes possible to remove the fixing member attached to the optical system moving unit with a simple configuration, and when removing the fixing member, As a result, it is possible to avoid the entire cover member from rotating. As a result, the cover member is fixed to the hole formed in the exterior cover while the cover member and the fixing member are moving together. The inconvenience of being removed from can be prevented.

  Embodiments of an image reading apparatus according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a drive mechanism of an image reading apparatus according to the first embodiment of the present invention, and FIG. 2 is an optical configuration of the image reading apparatus according to the first embodiment of the present invention. FIG.

  As shown in FIGS. 1 and 2, the image reading apparatus 1 has an outer shape composed of an exterior cover 2 formed of a metal plate, and includes a left side plate 2 a and a right side plate 2 b. An internal housing 7 is provided inside the exterior cover 2, and the image reading apparatus main body 1 a is configured by the exterior cover 2 and the internal housing 7. A contact glass 3 on which a document is placed is provided on the upper surface of the exterior cover 2. In the exterior cover 2 (or in the internal housing 7), the first and second independent from each other so as to be reciprocally movable parallel to the contact glass 3 (that is, in the direction of the arrow X). Optical system moving units 4 and 5 are supported.

  First, a detailed optical configuration will be described. As shown in FIGS. 1 and 2, the first optical system moving unit 4 includes a first optical system support member 40 that holds various components, and the first optical system support member 40 includes the first optical system support member 40. , A lamp 41 which is a light source for irradiating light on a document placed on the contact glass 3, a reflecting plate 42 for efficiently irradiating the document with light from the lamp 41, reflected light from the document (hereinafter, referred to as “light source”). And a first mirror 43 that further reflects the light toward the second optical system unit 5. On the other hand, the second optical system moving unit 5 has a second optical system support member 50 that holds various components, and the second optical system support member 50 is a document from the first mirror 43. Second and third mirrors 51 and 52 are provided that further reflect the reflected light and guide it to an image reading unit 6 described later. In FIG. 2, the optical path of the document reflected light is indicated by a one-dot chain line.

  In addition, as shown in FIG. 2, a condensing lens 60, in order from the upstream side of the optical path of the above-described document reflected light, is arranged in the outer cover 2 (or the inner housing 7) slightly closer to the right side plate 2b than the center. In addition, an image reading unit 6 having a CCD substrate 61 as a reading device is disposed.

  The image reading unit 6 has a base 62 that holds a mounting base 63 to which various components including a condenser lens 60 and a CCD substrate 61 are attached. The base 62 is screwed on the bottom plate of the exterior cover 2. It is fixed with etc. A mounting base 63 is fixed to the upper surface of the base 62 with screws or the like. A lens fixing plate (not shown) to which the condenser lens 60 is fixed and a CCD substrate 61 are fixed to the upper surface of the mounting base 63. A CCD connecting plate 65 that connects the CCD fixing plate 64 is attached.

  However, the lens fixing plate and the CCD connecting plate 65 are adjusted in the optical axis direction of the original reflected light so that the focal length of the original reflected light condensed by the condenser lens 60 with respect to the CCD substrate 61 is uniform. Is possible. Further, for adjusting the height of the CCD substrate 61 with respect to the optical axis of the original reflected light, a height adjusting screw 66 that passes through the CCD fixing plate 64 and is screwed to the CCD connecting plate 65, and the height adjusting screw 66 are inserted. A compression coil spring 67 interposed between the CCD fixing plate 64 and the CCD connecting plate 65 is provided, and the CCD fixing plate 64 is elastically deformed by the degree of screwing of the height adjusting screw 66. As a result, the height of the CCD substrate 61 is adjusted by moving up and down with respect to the CCD connecting plate 65 while receiving the force. A CCD cover 68 surrounding the CCD substrate 61 is fixed to the CCD fixing plate 64 via a gasket 69.

  Next, a detailed configuration for driving the reciprocating movement of the first and second optical system moving units 4 and 5 will be described. The first and second optical system moving units 4 and 5 are reciprocated so as to scan over the entire area of the document. At this time, the first optical system moving unit 4 has the second optical system. The moving unit 5 is always reciprocated at a speed twice that of the moving unit 5, so that the focal length of the original reflected light with respect to the CCD substrate 61, that is, the optical path length of the original reflected light is always constant. Such a reciprocating movement can be achieved with the following configuration.

  As shown in FIGS. 1 and 2, a rotating shaft 8 that is rotatably supported is disposed behind the image reading unit 6 (near the right side plate 2 b). In the vicinity of the rotating shaft 8, a drum 80 around which a wire 9 for reciprocating the first and second optical system moving units 4 and 5 is wound is coaxially and integrally fixed.

  Further, a joint pulley 81 is connected to one end portion of the rotating shaft 8, and driving is transmitted from a driving source such as a driving motor by a belt 11 stretched around the joint pulley 81. That is, a drive motor 10 serving as a drive source for the rotation of the rotary shaft 8 is disposed outside the rear side of the exterior cover 2 (the back side of the paper in FIG. 1), and an output shaft of the drive motor 10 is provided. The belt 11 is stretched between the joint pulley 81 connected to the rotary shaft 8, and the rotational output of the drive motor 10 is transmitted to the rotary shaft 8 by the belt 11. In some cases, instead of the joint pulley 81 and the belt 11, a driving force transmission medium may be constituted by gears.

  Further, in order from the left side in the exterior cover 2, a first hanging tool 12 projecting from the left side plate 7 a of the internal housing 7 and a first support 12 pivotally supported by front and rear side plates (not shown) of the exterior cover 2. 1 pulley 13, the second pulley 14 pivotally supported by the second optical system moving frame 50, the second hook 15 projecting from the base 62 of the image reading unit 6, and the right side plate 2b. A third pulley 16 is provided which is projected and pivotally supported. Furthermore, a guide rail 17 that guides the reciprocal movement of each of the first and second optical system moving units 4 and 5 is provided so as to extend in parallel with the contact glass 3.

  As shown in FIG. 1, one end of the wire 9 that actually controls the reciprocating movement of the first and second optical system moving units 4 and 5 is fixed to the first hanging tool 12, and the second pulley is temporarily provided. 14, and then wound around the first pulley 13, wound around the drum 80 of the rotating shaft 8 a plurality of times, and then hooked back onto the third pulley 16 and then moved to the first optical system. The frame body 40 is fixed and is again hung on the second pulley 14, and the other end is fixed to the second hook 15 and is stretched.

  Under such a configuration, when the output shaft of the drive motor 10 is rotated forward or backward, the drum 80 is rotated forward or backward together with the rotational shaft 8, and the wire 9 is moved accordingly. The first and second optical system moving units 4 and 5 reciprocate while maintaining a predetermined speed ratio. Thus, the first and second optical system moving units 4 and 5 are reciprocated in parallel with the document surface over the entire document so that the image of the document can be read.

  The above-described image reading apparatus 1 is a so-called separate device in which a CCD substrate 61 (including the condensing lens 60) as a reading device is fixed to the exterior cover 2 separately from the optical system moving unit that actually scans. There is also a so-called integrated type in which the CCD substrate 61 is fixed to the optical system moving unit and scanned integrally therewith.

  Next, fixation of the optical system moving unit in the image reading apparatus according to the first embodiment of the present invention will be described in detail with reference to the drawings.

  In this embodiment, set screws 18 and 19 are used as fixing members when fixing the first and second optical system moving units 4 and 5, and the first and second optical system moving units 4 and 5 are fixed. At this time, the set screws 18 and 19 are attached from the direction parallel to the reciprocating direction (X direction in the drawing) of the first and second optical system moving units 4 and 5, but formed on the exterior cover 2. The cover members 70 and 71 that are detachable with respect to the insertion holes 30 and 31 are provided, and the cover members 70 and 71 and the set screws 18 and 19 are integrally moved in a predetermined direction. This feature will be described in detail below.

  3 and 4 are longitudinal sectional views showing a fixing mechanism of the image reading apparatus according to the first embodiment of the present invention. As shown in FIG. 3, insertion holes 30 and 31 are formed in the left side plate 2 a of the exterior cover 2, and insertion holes 32 and 33 are formed in the left side plate 7 a of the internal housing 7. The set screws 18 and 19 have screw portions 18a and 19a, respectively. The set screws 18 and 19 are formed with groove portions (that is, slits) 18b and 19b for rotation.

  Further, the first optical system support member 40 is provided with a bent portion 41 that comes into contact with the inner housing 7, and the bent portion 41 has a screw hole 42 at a position corresponding to the insertion hole 32. Is formed. Similarly, the second optical system support member 50 is provided with a bent portion 51 that comes into contact with the inner housing 7. The bent portion 51 is screwed at a position corresponding to the insertion hole 33. A hole 52 is formed.

  When the first and second optical system moving units 4 and 5 are fixed, first, the set screw 18 is inserted into the insertion holes 30 and 32 and the set screw 19 is inserted from the outside of the exterior cover 2. The holes 31 and 33 are inserted. Next, by screwing the screw portion 18a into the screw hole 42 formed in the first optical system support member 40, the set screw 18 is inserted into the screw hole 42, and the first optical system support member 40 is inserted into the internal housing. By attaching to the body 7, the first optical system moving unit 4 is fixed to the image reading apparatus main body 1 a and the screw portion 19 a is screwed into the screw hole 52 formed in the second optical system support member 50. As a result, the set screw 19 is inserted into the screw hole 52 and the second optical system support member 50 is attached to the inner housing 7, whereby the second optical system moving unit 5 is attached to the image reading apparatus main body 1 a. The configuration is fixed. FIG. 4 shows a state in which the first and second optical system moving units 4 and 5 are fixed to the image reading apparatus main body 1a.

  With the above configuration, the movement of the first and second optical system moving units 4 and 5 during transportation is restricted, the first and second optical system moving units 4 and 5 and their peripheral parts are destroyed, It is possible to suppress the deviation of the optical axis of the projection optical system inside the first and second optical system moving units 4 and 5.

  Here, in this embodiment, as shown in FIGS. 5 and 6, cover members 70 and 71 for closing the insertion holes 30 and 31 formed in the exterior cover 2 are provided in the exterior cover 2. As shown in FIG. 7, the cover members 70 and 71 have cover member main bodies 70a and 71a and flange portions 70b and 71b, and are formed of a resin such as ABS, for example. As shown in FIGS. 5 and 6, the cover members 70 and 71 are formed with protruding portions 70 c and 71 c.

  8-11 is a figure for demonstrating the attachment / detachment mechanism of the cover members 70 and 71, FIG. 8 is a front view of the cover members 70 and 71, FIG. 9 is the insertion hole formed in the exterior cover 2. FIG. FIG. 10 is a diagram illustrating a state in which the cover members 70 and 71 are inserted into the insertion holes 30 and 31, and FIG. 11 illustrates the cover members 70 and 71 as the insertion holes 30 and 31. It is a figure which shows the state with which 31 was mounted | worn. In addition, the cover members 70 and 71 shown in FIG. 5 show the AA cross section of the cover members 70 and 71 shown in FIG.

  When attaching the cover members 70 and 71 to the insertion holes 30 and 31, respectively, first, as shown in FIG. 5, the cover members 70 and 71 are inserted from the left side plate 2a side of the exterior cover 2, respectively. Insert into holes 30,31. At this time, the cover members 70 and 71 are inserted into the insertion holes 30 and 31 with the collar portions 70b and 71b arranged in the left-right direction, as shown in FIG. More specifically, as shown in FIG. 9, the insertion holes 30 and 31 formed in the exterior cover 2 are provided with protrusions 30 a and 31 a formed by a part of the left side plate 2 a of the exterior cover 2. (See FIG. 5 and FIG. 6), of the insertion holes 30 and 31, the collar portions 70b and 71b are inserted into the left and right portions 30b and 31b of the projections 30a and 31a, and the central portions of the insertion holes 30 and 31 Cover member main bodies 70a and 71a are inserted into 30c and 31c (see FIG. 10). At this time, as shown in FIGS. 5 and 10, the longitudinal directions of the protrusions 70c and 71c provided on the cover members 70 and 71 are the reciprocal movements of the first and second optical system moving units 4 and 5, respectively. The cover members 70 and 71 are inserted into the insertion holes 30 and 31 so as to be substantially perpendicular to the direction (that is, the X direction).

  Next, from the state shown in FIG. 10, the cover member main bodies 70a and 71a are rotated by 90 ° in the direction of the arrows in the figure. Then, as shown in FIG. 11, since the flange portions 70b and 71b and the projection portions 30a and 31a are engaged, the cover members 70 and 71 are locked to the insertion holes 30 and 31, respectively. As a result, the cover member 70 and 71 are attached to the insertion holes 30 and 31. At this time, the projecting portions 70c and 71c are also turned 90 ° from the state shown in FIG. FIG. 6 is a longitudinal sectional view of the image reading apparatus including a BB section in a state where the cover members 70 and 71 are attached to the insertion holes 30 and 31 shown in FIG.

  As described above, according to this configuration, when the first and second optical system moving units 4 and 5 are fixed to the apparatus main body 1a by the set screws 18 and 19, and the image reading apparatus 1 is transported, the cover member 70, Since 71 is attached to the insertion holes 30 and 31, the cover members 70 and 71 are configured to block the insertion holes 30 and 31, so that dust, dust, and the like are contained in the outer cover 2 and the inner housing 7. It can be completely prevented from entering. Therefore, it becomes possible to prevent the dust, dust, and the like from adhering to the first, second, and third mirrors 43, 51, 52 provided in the first and second optical system moving units 4, 5. As a result, it is possible to reliably prevent image degradation.

  Next, the removal mechanism of the set screws 18 and 19 will be described. 12 to 14 are longitudinal sectional views for explaining a set screw removing mechanism in the image reading apparatus according to the first embodiment of the present invention.

  By removing the set screws 18 and 19 to release the fixed state of the first and second optical system moving units 4 and 5 and using the image reading apparatus 1, first, as shown in FIG. The cover members 70 and 71 are pressed in the direction of the arrow Y from the state where the cover members 70 and 71 are attached to the insertion holes 30 and 31. Then, as shown in FIG. 12, the projecting portions 70c and 71c formed on the cover members 70 and 71 are engaged with the rotation grooves 18b and 19b formed on the set screws 18 and 19, respectively.

  In this state, when the cover members 70 and 71 are rotated in the direction of the arrow shown in FIG. 10 (or FIG. 11), the set screws 18 and 19 are rotated in conjunction with the rotation of the cover members 70 and 71. Then, the cover member 70 and the set screw 18 and the cover member 71 and the set screw 19 are moved together in the Z direction shown in FIG. 12, and finally the state shown in FIG. 13 is obtained. . In this case, the cover members 70 and 71 are in the state described with reference to FIG. 6 (that is, the state where the collar portions 70b and 71b are engaged with the projection portions 30a and 31a and are attached to the insertion holes 30 and 31). ing.

  Next, it is necessary to remove the attached cover members 70 and 71 from the insertion holes 30 and 31. In this case, the operation described when attaching the cover members 70 and 71 to the insertion holes 30 and 31 described above. The reverse operation may be performed. That is, in FIG. 13, since the cover members 70 and 71 are in the state described in FIG. 6 as described above, the cover member main bodies 70a and 71a are moved from the state shown in FIG. Turn 90 °. Then, since the engagement between the collar portions 70b and 71b and the projections 30a and 31a is released, the cover members 70 and 71 are removed from the insertion holes 30 and 31, respectively. The cover members 70 and 71 are removed from the insertion holes 30 and 31. Then, the image reading apparatus 1 changes from the state shown in FIG. 13 to the state shown in FIG. In the present embodiment, as described above, the cover members 70 and 71 are detachably attached to the insertion holes 30 and 31 by inserting the cover members 70 and 71 into the insertion holes 30 and 31 and rotating them. Is adopted.

  Then, by removing the set screws 18 and 19 from the state shown in FIG. 14, the fixed state of the first and second optical system moving units 4 and 5 is released, and the image reading apparatus 1 can be used (that is, , The state shown in FIG.

  As described above, in this embodiment, when the cover members 70 and 71 are rotated in the direction of the arrow shown in FIG. 10 (or FIG. 11), the set screw 18 is interlocked with the rotation of the cover members 70 and 71. , 19 rotate, and the cover member 70 and the set screw 18 and the cover member 71 and the set screw 19 move together, so that the first and second optical system movements can be performed with a simple configuration. The set screws 18 and 19 attached to the units 4 and 5 can be removed.

  Here, as described above, the insertion holes 30 to 33 formed in the exterior cover 2 and the inner housing 7 are substantially parallel to the moving directions of the first and second optical system moving units 4 and 5. Therefore, when the image reading apparatus 1 is used in the state shown in FIG. 3, dust, dust and the like easily enter the internal housing 7 from the outside through the insertion holes 30 to 33. End up.

  Therefore, in this embodiment, as shown in FIG. 15, in the state shown in FIG. 3, the cover members 70 and 71 are again mounted on the insertion holes 30 and 31 by the above-described method. . Therefore, according to this configuration, even when the image reading apparatus 1 is used by removing the set screws 18 and 19 to release the fixed state of the first and second optical system moving units 4 and 5, the cover member 70. 71 are attached to the insertion holes 30 and 31, so that the cover members 70 and 71 close the insertion holes 30 and 31, so that dust, dust and the like are contained in the outer cover 2 and the inner housing 7. Can be prevented completely, and adhesion of dust, dust, etc. to the first, second, and third mirrors 43, 51, 52 provided in the first and second optical movement units 4, 5 is prevented. As a result, it is possible to reliably prevent image degradation.

  In the present embodiment, since the cover members 70 and 71 are detachably provided to the insertion holes 30 and 31, the first and second optical system moving units 4 and 5 are provided in the apparatus main body 1a. In both cases of fixing and transporting the image reading apparatus 1, and releasing the fixed state of the first and second optical system moving units 4 and 5 and using the image reading apparatus 1, dust and dirt Or the like can be completely prevented from entering the exterior cover 2 or the internal housing 7.

  Furthermore, in this embodiment, since the cover members 70 and 71 are detachable by inserting the cover members 70 and 71 into the insertion holes 30 and 31 and turning them, the cover members 70 and 71 are detachable. Can be completely prevented from entering the exterior cover 2 and the internal housing 7.

  Next, a second embodiment of the image reading apparatus of the present invention will be described in detail with reference to the drawings. 16-18 is a figure for demonstrating the structure of the cover members 72 and 73 in this embodiment, FIG. 16 is a front view of the cover members 72 and 73, FIG. 17 is the cover member shown in FIG. 72 and 73 are cross-sectional views taken along the line CC, and FIG. 18 is a cross-sectional view taken along the line DD of the cover members 72 and 73 shown in FIG.

  The cover members 72 and 73 of the present embodiment are the rotation members 72a and 71a that are rotatably supported by the cover member main bodies 70a and 71a in the cover members 70 and 71 (see FIG. 8) described in the first embodiment. Except for the point that 73a is further provided, the configuration is exactly the same as in the first embodiment. Therefore, since other operations and configurations are the same as those in the first embodiment, the same members are denoted by the same reference numerals, and detailed description thereof is omitted here. The overall configuration of the image reading apparatus, the driving mechanism, the optical configuration, the optical system moving unit fixing structure, and the cover member attaching / detaching mechanism in the present embodiment are also the same as those in the first embodiment. Therefore, detailed description thereof is omitted here.

  As shown in FIGS. 16-18, the cover member main bodies 70a and 71a are comprised by the above-mentioned rotation members 72a and 73a and the main body members 72b and 73b, and the outer periphery of substantially circular rotation members 72a and 73a. The cover member main bodies 70a and 71a in a state where the protrusions 72e and 73e formed along the surface are inserted into the grooves 72d and 73d formed in the main body members 72b and 73b corresponding to the protrusions 72e and 73e. (To be more specific, the rotation members 72a and 73a are rotatably supported with respect to the main body members 72b and 73b). Further, the protrusions 70c and 71c described in the first embodiment are formed on the rotating members 72a and 73a, and rotation grooves (that is, slots) 72c and 73c are formed on the surfaces thereof. Is formed. In the present embodiment, the protrusions 72e and 73e are formed on the rotating members 72a and 73a, and the grooves 72d and 73d are formed on the main body members 72b and 73b corresponding to the protrusions 72e and 73e. However, the grooves 72d and 73d may be formed in the rotating members 72a and 73a, and the protrusions 72e and 73e may be formed in the main body members 72b and 73b.

  Next, the removal mechanism of the set screws 18 and 19 will be described. FIGS. 19 and 20 are longitudinal sectional views for explaining a set screw removing mechanism in the image reading apparatus according to the second embodiment of the present invention. FIGS. It is a figure corresponding to FIG. 12, FIG.

  That is, FIG. 19 shows that in this embodiment, the cover members 72 and 73 are pressed in the direction of the arrow Y (see FIG. 6) from the state where the cover members 72 and 73 are attached to the insertion holes 30 and 31, This represents a state in which the protruding portions 70c and 71c formed on the rotating members 72a and 73a are fitted in the rotating grooves 18b and 19b formed on the set screws 18 and 19, respectively.

  Next, in this state, a turning tool such as a screwdriver is inserted into the turning grooves 72c and 73c formed in the turning members 72a and 73a, and the turning tool is rotated in the direction of the arrow shown in FIG. When moved, in the cover members 72 and 73, only the rotation members 72a and 73a rotate in the direction of the arrow shown in FIG. 16 and stop in conjunction with the rotation of the rotation members 72a and 73a. The screws 18 and 19 are rotated, and the cover member 72 and the set screw 18 and the cover member 73 and the set screw 19 are moved together in the Z direction shown in FIG. The state shown in FIG. In this case, the cover members 72 and 73 are in the same state as the cover members 70 and 71 described in FIG. 13 (that is, the collar portions 70b and 71b and the projection portions 30a and 31a are engaged, It is attached state).

Next, it is necessary to remove the attached cover members 72 and 73 from the insertion holes 30 and 31. In this case, the same operation as that described in the first embodiment may be performed.
That is, the cover member attaching / detaching mechanism is exactly the same as that of the first embodiment described above, and therefore detailed description thereof is omitted here.

  Then, after the cover members 72 and 73 are removed, the set screws 18 and 19 are removed, so that the fixed state of the first and second optical system moving units 4 and 5 is released, and the image reading apparatus 1 can be used. The state (that is, the state shown in FIG. 3) can be obtained.

  As described above, in the present embodiment, in the cover members 72 and 73, only the rotating members 72a and 73a rotate in a predetermined direction and are stopped in conjunction with the rotation of the rotating members 72a and 73a. Since the screws 18 and 19 are rotated, and the cover member 72 and the set screw 18 and the cover member 73 and the set screw 19 are moved together, the first and the first are configured with a simple configuration. It is possible to remove the set screws 18 and 19 attached to the optical system moving units 4 and 5 of the second optical system and to rotate the entire cover members 72 and 73 when removing the set screws 18 and 19. As a result, while the cover member 72 and the set screw 18 and the cover member 73 and the set screw 19 are moving together, the cover members 72 and 7 But it is possible to prevent the disadvantage that the insertion hole 18 and 19 would be inadvertently removed.

  Further, as described in the first embodiment, the insertion holes 30 to 33 formed in each of the exterior cover 2 and the inner housing 7 move the first and second optical system moving units 4 and 5. Since the image reading apparatus 1 is used in the state shown in FIG. 3, dust, dust, and the like are collected from the outside through the insertion holes 30 to 33. In this embodiment, as shown in FIG. 21, in the state shown in FIG. 3, the cover members 72 and 73 are inserted into the insertion holes 30 and 31 by the above-described method. Again, it is configured to be mounted.

  Therefore, according to this configuration, even when the fixed state of the first and second optical system moving units 4 and 5 is released and the image reading apparatus 1 is used, the cover members 72 and 73 are inserted into the insertion holes 30 and 31. Since the cover members 72 and 73 are configured to block the insertion holes 30 and 31, dust and dust are completely prevented from entering the exterior cover 2 and the internal housing 7. It is possible to prevent the dust, dust, and the like from adhering to the first, second, and third mirrors 43, 51, 52 included in the first and second optical system moving units 4, 5. Therefore, as a result, it is possible to reliably prevent image degradation.

  In the present embodiment, since the cover members 72 and 73 are detachably provided to the insertion holes 30 and 31, the first and second optical system moving units 4 and 5 are provided in the apparatus main body 1a. In both cases of fixing and transporting the image reading apparatus 1, and releasing the fixed state of the first and second optical system moving units 4 and 5 and using the image reading apparatus 1, dust and dirt Or the like can be completely prevented from entering the exterior cover 2 or the internal housing 7.

  Further, in the present embodiment, the cover members 72 and 73 are inserted into the insertion holes 30 and 31 and are rotated so that the cover members 70 and 71 are detachable. Can be completely prevented from entering the exterior cover 2 and the internal housing 7.

  In addition, this invention is not limited to the said embodiment, Based on the meaning of this invention, it is possible to change suitably the structure of each part, a shape, etc., and excludes them from the scope of the present invention. is not.

  For example, as shown in FIGS. 22 to 24, cover members 74 and 75 provided with a plurality of protrusions 74a and 75a are used for the body members 72b and 73b of the cover members 72 and 73 in the second embodiment described above. It is good also as a structure. 22 is a front view of the cover members 74 and 75, FIG. 23 is an EE sectional view of the cover members 74 and 75 shown in FIG. 22, and FIG. 24 is an F view of the cover members 74 and 75 shown in FIG. It is -F sectional drawing.

  That is, the cover members 74 and 75 of this modification are the same as the cover members 72 and 73 described in the second embodiment (see FIGS. 16 to 18) except that a plurality of protrusions 74a and 75a are further provided. The configuration is exactly the same as in the second embodiment described above. Therefore, since other operations and configurations are the same as those of the second embodiment described above, the same members are denoted by the same reference numerals, and detailed description thereof is omitted here. Further, the entire configuration of the image reading apparatus, the driving mechanism, the optical configuration, the optical system moving unit fixing structure, the cover member attaching / detaching mechanism, and the cover member rotating mechanism in the present embodiment are also described above. Therefore, detailed description thereof is omitted here.

  FIGS. 25 and 26 are longitudinal sectional views for explaining a set screw removing mechanism in the image reading apparatus according to this modification. FIGS. 25 and 26 are respectively the second embodiment described above. FIG. 21 is a diagram corresponding to FIGS. 19 and 20. Here, the removal mechanism of the set screws 18 and 19 is also the same as in the case of the second embodiment described above, and therefore, detailed description thereof is omitted here, but in the present modification, as described above, Since the plurality of protrusions 74a and 75a are further provided, the cover members 74 and 75 are indicated by the arrow Y (see FIG. 6) from the state where the cover members 74 and 75 are attached to the insertion holes 30 and 31. When the projecting portions 70c and 71c formed on the rotating members 72a and 73a are fitted to the rotating grooves 18b and 19b formed on the set screws 18 and 19, the cover members 74 and 75 are pressed. Movement in the arrow Y direction is restricted, and tilting and rattling of the cover members 74 and 75 can be prevented. Therefore, in addition to the effects described in the second embodiment, the rotation groove 18b It is possible to reliably fit the protrusions 70c and 71c to the 19b, and the cover members 74 and 75 are inadvertently released (that is, the cover members 74 and 75 are removed from the insertion holes 30 and 31). Can be effectively prevented from being inadvertently removed.

  Also in this modified example, as shown in FIG. 27, in the state shown in FIG. 3, the cover members 74 and 75 are again attached to the insertion holes 30 and 31 by the above-described method. Therefore, it is possible to obtain the same effect as that described in the first and second embodiments.

  As an application example of the present invention, there is an image reading apparatus that reads an image of a document by being used alone as a scanner or mounted on a copying machine, a facsimile, or the like.

These are the longitudinal cross-sectional views which show the drive mechanism of the image reading apparatus which concerns on the 1st Embodiment of this invention. These are longitudinal cross-sectional views which show the optical structure of the image reading apparatus which concerns on the 1st Embodiment of this invention. These are the longitudinal cross-sectional views which show the fixing mechanism of the image reading apparatus which concerns on the 1st Embodiment of this invention. These are the longitudinal cross-sectional views which show the fixing mechanism of the image reading apparatus which concerns on the 1st Embodiment of this invention. These are the longitudinal cross-sectional views which show the state at the time of attaching the cover member in the image reading apparatus which concerns on the 1st Embodiment of this invention. These are the longitudinal cross-sectional views which show the state which attached the cover member in the image reading apparatus which concerns on the 1st Embodiment of this invention. FIG. 3 is a perspective view showing an external configuration of a cover member in the image reading apparatus according to the first embodiment of the present invention. FIG. 3 is a front view of a cover member in the image forming apparatus according to the first embodiment of the present invention. These are the schematics for demonstrating the shape of the penetration hole formed in the exterior cover in the image forming apparatus which concerns on the 1st Embodiment of this invention. These are the figures which show the state which inserted the cover member in the image formation apparatus which concerns on the 1st Embodiment of this invention in the penetration hole. These are figures which show the state in which the cover member in the image forming apparatus which concerns on the 1st Embodiment of this invention was mounted | worn with the insertion hole. These are the longitudinal cross-sectional views for demonstrating the setscrew removal mechanism in the image forming apparatus which concerns on the 1st Embodiment of this invention. These are the longitudinal cross-sectional views for demonstrating the setscrew removal mechanism in the image forming apparatus which concerns on the 1st Embodiment of this invention. These are the longitudinal cross-sectional views for demonstrating the setscrew removal mechanism in the image forming apparatus which concerns on the 1st Embodiment of this invention. When the fixed state of the first and second optical system moving units in the image forming apparatus according to the first embodiment of the present invention is released and the image reading apparatus is usable, the cover member is It is a longitudinal cross-sectional view which shows the mounted state again. These are the front views of the cover member in the image forming apparatus which concerns on the 2nd Embodiment of this invention. FIG. 17 is a cross-sectional view of the cover member shown in FIG. FIG. 17 is a DD cross-sectional view of the cover member shown in FIG. 16. These are the longitudinal cross-sectional views for demonstrating the setscrew removal mechanism in the image forming apparatus which concerns on the 2nd Embodiment of this invention. These are the longitudinal cross-sectional views for demonstrating the setscrew removal mechanism in the image forming apparatus which concerns on the 2nd Embodiment of this invention. When the first and second optical system moving units in the image forming apparatus according to the second embodiment of the present invention are released from the fixed state and the image reading apparatus is in a usable state, the cover member is It is a longitudinal cross-sectional view which shows the mounted state again. These are front views which show the modification of the cover member in the image forming apparatus which concerns on the 2nd Embodiment of this invention. FIG. 23 is an EE cross-sectional view of the cover member shown in FIG. 22. FIG. 24 is a cross-sectional view of the cover member shown in FIG. 23 taken along the line F-F. These are the longitudinal cross-sectional views for demonstrating the setscrew removal mechanism in the modification of the image forming apparatus which concerns on the 2nd Embodiment of this invention. These are the longitudinal cross-sectional views for demonstrating the setscrew removal mechanism in the modification of the image forming apparatus which concerns on the 2nd Embodiment of this invention. Is a cover when the fixed state of the first and second optical system moving units in the modified example of the image forming apparatus according to the second embodiment of the present invention is released and the image reading apparatus can be used. It is a longitudinal cross-sectional view which shows the state which mounted | wore the member again.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image reading apparatus 1a Image reading apparatus main body 2 Exterior cover 4 1st optical system moving unit 5 2nd optical system moving unit 7 Internal housing | casing 18, 19 Set screw 18b, 19b Groove part 30, 31 Insertion hole 32 33 Insertion hole 40 1st optical system moving frame body 42 Screw hole 50 2nd optical system moving frame body 52 Screw hole 70, 71 Cover member 70c, 71c Protruding part 72, 73 Cover member 72a, 73a Rotating member 72c 73c Groove for rotation 74, 75 Cover member 74a, 75a Projection

Claims (2)

An optical system moving unit that holds a mirror that further reflects light reflected from the document, an exterior cover of the apparatus main body, and an internal housing of the apparatus main body, and a fixing member for fixing the optical system moving unit The optical system moving unit is fixed to the image reading apparatus main body by being inserted into holes formed in each of the optical system moving unit, the exterior cover, and the inner housing and attaching the fixing member to the optical system moving unit. In the image reading apparatus to
The outer cover is provided with a cover member for closing a hole formed in the outer cover, and the cover member and the fixing member integrally move in a predetermined direction ,
By inserting and rotating the cover member into the hole formed in the exterior cover, the cover member becomes detachable with respect to the hole formed in the exterior cover,
When the fixing member rotates in conjunction with the rotation of the cover member, the cover member and the fixing member move together in a predetermined direction,
The fixing member has a groove, and the cover member has a protrusion and a collar. When the protrusion is fitted into the groove, the cover member is interlocked with the rotation of the cover member. And the fixing member is rotatable,
To restrict the movement of the said predetermined direction of said cover member, and projecting portions are provided which are formed by a portion of the outer cover, the read image the protrusion and the flange portion is characterized Rukoto to adjust engagement apparatus. The cover member is provided with a rotation member that is rotatably supported by a cover member main body, and the cover member rotates when the fixing member rotates in conjunction with the rotation of the rotation member. And the fixing member integrally move in a predetermined direction,
A groove portion is formed in the fixing member, a protrusion portion is formed on the rotating member and a rotation groove portion is formed on the surface, and the protrusion portion is fitted into the groove portion of the fixing member. , said rotating tool into the groove of the rotating member is inserted to rotate, said fixing member in conjunction with rotation of the rotating member according to claim 1, characterized in Rukoto Do rotatable Image reading device.

Images