JP2009042467A - Image reader and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reader for easily preventing an original set on a contact glass from rising, and to provide an image forming apparatus provided with the image reader. <P>SOLUTION: The image reader 103 for reading an image by placing the original 5 on the contact glass 4 is equipped with reference scales 3a and 3b provided along both side edges of the contact glass 4, and original regulating members 2a and 2b regulating raise of the original 5 from the contact glass 4. The original regulating members 2a and 2b are provided on the reference scales 3a and 3b, and positioned with a gap 20 between the contact glass 4 and the original regulating members 2a and 2b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image reading apparatus and an image forming apparatus provided with the image reading apparatus.

  An image reading apparatus mounted on a copying machine or the like is provided with a background plate that covers the document. The background plate is usually provided inside the cover that protects the contact glass, and the document is pressed against the contact glass to prevent the document from lifting. When pressed against the contact glass, the quality of the read image may be deteriorated.

  In Patent Document 1, an original regulating member is rotatably provided on a reference scale for positioning an original along the edge of the contact glass, and the original is sandwiched between the contact glass and the original regulating member. Discloses a technique for preventing the glass from floating from the contact glass.

Japanese Patent Laid-Open No. 11-231443

  However, in Patent Document 1, after setting an original on the contact glass, it is necessary to rotate the fixing member while pressing the original with the hand to press the original against the contact glass, which is troublesome to prevent the original from lifting. It takes.

  An object of the present invention is to provide an image reading apparatus that can easily prevent a document set on a contact glass from floating and an image forming apparatus provided with the image reading apparatus.

  In order to solve the above-mentioned problems, the invention described in claim 1 is an image reading apparatus for reading an image by placing a document on a contact glass, and a reference scale provided along the vertical and horizontal edges of the contact glass. And a document restricting member that restricts the document from floating from the contact glass. The document restricting member is provided on the reference scale, and is located with a gap between the contact glass.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the document regulating member slides and can be retracted to the reference scale side.

  The invention described in claim 3 is characterized in that, in the invention described in claim 2, the manuscript restricting member is engraved with a scale and constitutes a part of a reference scale.

  The invention described in claim 4 is characterized in that, in the invention described in claim 2, the reference scale is provided with a recess opening on the side of the contact glass, and the document regulating member can be stored in the recess. .

  According to a fifth aspect of the present invention, in the first aspect of the invention, the document restricting member is rotatable about a shaft provided along the reference scale, and rotates to overlap the reference scale. Features.

  The invention described in claim 6 is the invention described in any one of claims 3 to 5, wherein a vertical document regulating member provided along a vertical reference scale and a horizontal document regulating member provided along a horizontal reference scale are provided. The document restricting member is connected.

  A seventh aspect of the present invention is an image forming apparatus provided with the image reading apparatus according to any one of the first to sixth aspects.

  According to the present invention, when a document is set on the contact glass, it is possible to easily prevent the document from floating from the contact glass only by inserting the document between the contact glass and the document regulating member.

  The first embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a plan view showing the vicinity of the contact glass of the image reading apparatus according to the present embodiment, FIG. 2 is a cross-sectional view taken along the line AA showing the vicinity of the contact glass of the image reading apparatus according to the present embodiment, and FIG. FIG. 4 is a side view of the image reading apparatus according to the present embodiment, and FIG. 4 is a longitudinal sectional view showing a schematic configuration of the image forming apparatus according to the present embodiment.

  The image reading apparatus 103 according to the present embodiment is provided in a copying machine (image forming apparatus) 100 as shown in FIG. 4, and along the edge of the contact glass 4 as shown in FIG. A vertical reference scale 3a and a horizontal reference scale 3b (see FIG. 1), a vertical document regulating member (transparent plastic sheet) 2a that regulates the document 5 from being lifted from the contact glass 4, and a horizontal document regulation. A member (transparent plastic sheet) 2b is provided. As shown in FIG. 3, the image reading apparatus 103 includes a contact glass 4, a cover 15 that protects the contact glass 4, a background plate 17, and a scanner main body 19.

  As shown in FIG. 1, the document regulating members 2a and 2b are provided at right angles to each other along the reference scales 3a and 3b.

  As shown in FIG. 2, the fixing portion 20 of the document restricting member 2 b is bonded onto the reference scale 3 b, and the protruding portion 22 of the document restricting member 2 b is provided to protrude to a position facing the contact glass 4. Yes. There is a gap M between the overhanging portion 22 and the contact glass 4 so that one original 5 can enter. The document restricting member 2a is also provided in the same manner as the document restricting member 2b.

  Here, a schematic configuration and operation of the copying machine 100 provided with the image reading apparatus according to the present embodiment will be described with reference to FIG. The copying machine 100 includes a recording unit 1 that records on a sheet (recording medium) 61, a sheet feeding unit 55 that supplies the sheet 61, a sheet discharge unit 57 that discharges the sheet, and an image reading device 103 that reads an image of a document. It has.

  The document is set on the contact glass with the document edge abutting against the reference scales 3a and 3b, and the image reading unit 59 of the image reading device 103 reads the image of the document 5. On the other hand, the sheet 61 in the sheet cassette is conveyed by the sheet feeding roller 63 in the sheet feeding unit 55, and a plurality of sheets 61 are frictionally separated at the nip position of the rubber separation pad 65, and only the uppermost sheet 61 is supplied. (Guide entrance roller / registration roller) 67 is conveyed to the recording unit 1, and then an image is recorded by the recording unit 1.

  Below, the effect of 1st Embodiment is demonstrated.

  According to the present embodiment, when the document 5 is set on the contact glass 4, the document 5 is lifted from the contact glass 4 simply by inserting the document 5 between the contact glass 4 and the document regulating members 2 a and 2 b. Can be easily prevented.

  Since the vertical document regulating member 2a and the horizontal document regulating member 2b regulate the lifting of the vertical and horizontal edges of the document 5, the document 5 can be reliably prevented from being lifted.

  The image reading apparatus 103 according to the present embodiment can be provided in the copying machine (image forming apparatus) 100.

  Next, another embodiment of the present invention will be described. In the following description, parts having the same operational effects as those of the first embodiment described above are denoted by the same reference numerals, and the parts thereof are described. Detailed description will be omitted, and the following description will mainly focus on differences from the first embodiment described above.

  The second embodiment of the present invention will be described below. In the present embodiment, as shown in FIG. 5, recesses 6 for storing the document regulating members 2a and 2b are formed in the reference scales 3a and 3b.

  The recess 6 is formed continuously in the longitudinal direction of the reference scales 3a and 3b and from one end to the other end in the longitudinal direction of the reference scales 3a and 3b. The recess 6 is provided in parallel to the contact glass 4 and opened to the contact glass side.

  The document restricting members 2 a and 2 b include a handle 7 and a stopper 8. The handle 7 is formed with a guide hole 21 that is continuous in a direction perpendicular to the longitudinal direction of the reference scales 3a and 3b. 7 is inserted into a guide hole 21 provided in the guide 7. The guide hole 21 is a long hole, and the combination of the stopper 8 and the guide hole 21 guides the document restricting members 2a and 2b to limit the moving distance of the document restricting members 2a and 2b.

  The document restricting members 2a and 2b have an initial position 27 (see FIG. 5A) where the document restricting members 2a and 2b are housed in the recesses of the reference scales 3a and 3b, and a position 29 facing the contact glass 4 (see FIG. 5 (see FIG. 5 (b)). When the document restricting members 2a and 2b are at a position 29 facing the contact glass, there is a gap M between the contact glass and the document restricting members 2a and 2b so that one document can enter.

  According to the present embodiment, by placing the document regulating members 2a and 2b at the initial position 27, it is possible to easily set the document 5 on the contact glass 4, while facing the contact glass 4 from the initial position 27. By moving the document regulating members 2a and 2b to the position 29 and regulating the lifting of the document 5 by the document regulating members 2a and 2b, the document 5 can be prevented from being lifted from the contact glass 4.

  Since the document restricting members 2a and 2b are provided with the handle 7, the document restricting members 2a and 2b are slid by being gripped by the handle 7 and pulled out from the recess 6 of the reference scales 3a and 3b, and the recesses of the reference scales 3a and 3b. It can be easily retracted into 6 and stored.

  As the document restricting members 2a and 2b move, the guide hole 21 provided in the handle 7 is guided by the stopper 8, so that the movement of the document restricting members 2a and 2b can be guided, and the document restricting members 2a and 2b It can prevent falling off from the dent 6 of the reference scales 3a and 3b.

  The third embodiment of the present invention will be described below. In the present embodiment, as shown in FIG. 6, the document regulating members 2a and 2b are placed on the upper surface 33 of the reference scales 3a and 3b. Note that the manuscript regulating members 2a and 2b are engraved with a scale 54 and constitute a part of the reference scale.

  As shown in FIG. 6 (b), the document regulating members 2a and 2b and the reference scales 3a and 3b are respectively provided with a convex portion 35 having a cache and a concave portion 37 to be fitted thereto, and the document regulating member 2a, 2b is prevented from detaching upward from the reference scales 3a and 3b. The convex portions 35 of the document regulating members 2a and 2b and the concave portions 37 of the reference scales 3a and 3b are continuously provided in a direction perpendicular to the longitudinal direction of the reference scales 3a and 3b. ) Are closed at both ends in the direction perpendicular to the paper surface.

  As shown in FIG. 6C, the document restricting members 2a and 2b slide on the reference scales 3a and 3b, and an initial position 39 where the document restricting members 2a and 2b are located immediately above the reference scales 3a and 3b. And the document regulating members 2a and 2b can move between a position 41 facing the contact glass 4. When the document restricting members 2a and 2b are at a position 41 facing the contact glass, there is a gap M between the contact glass and the document restricting members 2a and 2b so that one document can enter.

  According to the present embodiment, by placing the document regulating members 2a and 2b at the initial position 39, the document 5 can be easily set on the contact glass 4, while facing the contact glass 4 from the initial position 39. By restricting the lifting of the document 5 by moving the document regulating members 2 a and 2 b to the position 41, it is possible to prevent the document 5 from being lifted from the contact glass 4.

  Since the handle 10 is provided on the document restricting members 2 a and 2 b, the handle 10 is grasped and the document restricting members 2 a and 2 b are slid to easily move between the initial position 39 and the position 41 facing the contact glass 4. be able to.

  Since the convex portions 35 and the concave portions 37 provided on the original regulating members 2a and 2b and the reference scales 3a and 3b are fitted, the movement of the original regulating members 2a and 2b can be guided and the original regulating members 2a and 2b can be guided. Can be prevented from falling off the reference scales 3a and 3b.

  The fourth embodiment will be described below. In the present embodiment, as shown in FIG. 7, the reference scales 3a and 3b include a support member 43 that supports the document regulating members 2a and 2b. The support member 43 is rotatably provided on an upper portion 47 of the document contact reference surface 45 of the reference scales 3a and 3b and on a shaft 9 provided along the reference scales 3a and 3b. The document regulating members 2 a and 2 b are bonded to the support member 43, and can be folded with respect to the shaft 9 together with the support member 43. The shaft 9 is provided with a detent 49 for the document restricting members 2a and 2b in parallel with the contact glass 4 and projecting toward the contact glass 4 so that the document restricting members 2a and 2b are opposed to the contact glass 4. The document regulating members 2 a and 2 b are kept parallel to the contact glass 4 when folded back to 51.

  The document regulating members 2a and 2b are located between an initial position 53 (see FIG. 7A) facing the upper surface 50 of the reference scales 3a and 3b and a position 51 facing the contact glass 4 (see FIG. 7B). It can be moved by folding. When the document restricting members 2a and 2b are at the position 51 facing the contact glass, there is a gap M between the contact glass and the document restricting members 2a and 2b so that one document can enter.

  According to the present embodiment, the document regulating members 2a, 2b can be easily moved from the initial position 53 to the position 51 facing the contact glass by folding the document regulating members 2a, 2b with respect to the shaft 9. In addition, the document regulating members 2a and 2b can be easily moved from the position 51 facing the contact glass 4 to the initial position 53.

  The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention.

  Although the document restricting members 2a and 2b in the first embodiment are flat, instead of this, as shown in FIG. 10, a tapered document restricting member 113 is used to form the contact glass 4 and the document restricting member. The document restricting member 113 may be provided such that the distance from the lower surface of the 113 becomes longer as the distance from the reference scales 3a and 3b increases. The document 5 can be smoothly inserted between the contact glass 4 and the document regulating members 2a and 2b.

  In the second and third embodiments, the vertical and horizontal document restricting members 2a and 2b are moved separately. However, as shown in FIG. 8A, the document restricting formed in an L shape is used. The member 11a or the document restricting member 11b, which is formed by connecting the vertical document restricting member 2a and the horizontal document restricting member 2b into an L shape, is slid obliquely with respect to the contact glass 4 so as to move. good. The vertical and horizontal original regulating members can be moved by one operation. 8B and 9B are a DD sectional view and an EE sectional view, respectively.

  In the fourth embodiment, the vertical and horizontal document regulating members 2a and 2b are folded back separately, but as shown in FIG. 11, adjacent ends of the vertical document regulating member 2a and the horizontal document regulating member 2b are adjacent to each other. May be connected by a rubber band 111 so that the document regulating members 2a and 2b can be folded back together. The vertical and horizontal original regulating members can be moved by one operation.

  In the fourth embodiment, the rotation stop 49 is provided on the shaft 9, but the document 5 placed on the contact glass 4 is pressed by one end of the document regulating members 2a and 2b without providing the rotation stop 49. May be.

  In the second embodiment and its modification, the third embodiment and its modification, and the fourth embodiment, the document regulating members 2a, 2b, 11, and 13 are grasped and pulled out or the document regulating members 2a and 2b. However, instead of this, one end of a spring (spring) is placed on the document regulating members 2a and 2b and the other end is placed on the main body of the reference scales 3a and 3b. At the initial position, the spring is contracted to restrict the extension of the spring, and this restriction is released with one touch so that the document regulating members 2a and 2b move from the initial position to a position facing the contact glass. Anyway.

FIG. 3 is a plan view showing the vicinity of a contact glass of the image reading apparatus according to the first embodiment. It is a longitudinal cross-sectional view which shows the contact glass vicinity of the image reading apparatus which concerns on 1st Embodiment. 1 is a side view of an image reading apparatus according to a first embodiment. 1 is a longitudinal sectional view illustrating a schematic configuration of an image forming apparatus according to a first embodiment. (A) It is a perspective view which shows the state which the document control member based on 2nd Embodiment exists in an initial position. (B) It is BB sectional drawing which shows the state in which the original document control member based on 2nd Embodiment exists in the position which opposes contact glass. (A) It is a perspective view which shows the movement state of the upper part of the reference | standard scale which concerns on 3rd Embodiment. (B) It is CC sectional drawing which shows the fitting state of the upper part and lower part of the reference | standard scale which concerns on 3rd Embodiment. (C) It is FF sectional drawing which shows the movement state of the upper part of the reference | standard scale which concerns on 3rd Embodiment. (A) It is a perspective view which shows the state which the document control member based on 4th Embodiment exists in an initial position. (B) It is a perspective view which shows the state which has the document control member which concerns on 4th Embodiment in the position which opposes contact glass. (A) It is a top view which shows the contact glass vicinity of the image reading apparatus which concerns on the modification of 2nd Embodiment. (B) It is DD sectional drawing which shows the state in which the original document control member which concerns on the modification of 2nd Embodiment exists in the position which opposes contact glass. (A) It is a top view which shows the contact glass vicinity of the image reading apparatus which concerns on the modification of 3rd Embodiment. (B) It is EE sectional drawing which shows the contact glass vicinity of the image reading apparatus which concerns on the modification of 3rd Embodiment. It is a longitudinal cross-sectional view which shows the contact glass vicinity of the image reading apparatus which concerns on the modification of 1st Embodiment. It is a top view which shows the original document control member which concerns on the modification of 4th Embodiment.

Explanation of symbols

2a, 2b Vertical document regulating member, horizontal document regulating member 3a, 3b Vertical reference scale, horizontal reference scale 4 Contact glass 5 Document 6 Recess 9 Axis 27 Initial position 29 Position facing contact glass 39 Initial position 41 Contact Position facing the glass 51 Position facing the contact glass 53 Initial position 54 Scale 100 Copying machine (image forming apparatus)
103 Image reader M Clearance

Claims (7)

  An image reading apparatus for reading an image by placing a document on a contact glass, comprising a reference scale provided along the vertical and horizontal edges of the contact glass, and a document restriction member for restricting the document from lifting from the contact glass The document reading member is provided on a reference scale, and is positioned with a gap between the original and the contact glass.   2. The image reading apparatus according to claim 1, wherein the document restricting member is slidable and retractable to the reference scale side.   The image reading apparatus according to claim 2, wherein a scale is engraved on the document restricting member and constitutes a part of a reference scale.   The image reading apparatus according to claim 2, wherein the reference scale includes a recess that opens toward the contact glass, and the document restricting member can be stored in the recess.   The image reading apparatus according to claim 1, wherein the document restricting member is rotatable about a shaft provided along the reference scale, and rotates to overlap the reference scale.   6. The vertical document regulating member provided along the vertical reference scale and the horizontal document regulating member provided along the horizontal reference scale are connected to each other. Image reading apparatus. An image forming apparatus comprising the image reading apparatus according to claim 1.

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