JP6926673B2 - Document reader and image forming device - Google Patents

Description

The present invention relates to a document reading device and an image processing device.

Patent Document 1 describes an image of a document including a mounting table on which a document is placed, and an image of a document provided inside the housing and having a photoelectric conversion element and a lighting means and mounted on the table described above. In an image reading device including a reading means for scanning and reading and a driving means for moving and scanning the reading means, a guiding means parallel to the sub-scanning direction of the image reading means is provided in the housing. A sliding member or a rotating member is provided on the main scanning direction reference of the image reading means, and the urging means for urging contact with the parallel guiding means and one side parallel to the sub-scanning direction of the document mounting table are abutted against the parallel guiding means. An image reader is described that comprises means of contact.

Japanese Unexamined Patent Publication No. 2005-159631

If the document reading unit for reading the document is positioned with respect to the base member using, for example, a metal screw, shavings may be generated when the metal screw or the like rubs against other parts. There is a risk of poor reading of the original due to the generation of debris.

An object of the present invention is to provide a document reading device and an image forming device capable of making it difficult for shavings to be generated as compared with a technique of positioning a document reading unit with respect to a base member using a screw.

The present invention according to claim 1
With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
Have,
The positioning mechanism is arranged on one end side in the longitudinal direction of the reading portion, and the contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. It is a document reading device having a urging means for urging the reading unit.

The present invention according to claim 2
The reading unit is housed, and further has a storage unit that moves with respect to the base member integrally with the reading unit.
The document reading device according to claim 1, wherein a surface of the accommodating portion facing the reading portion is used as the contacted portion.

According to the third aspect of the present invention, the accommodating portion has a stepped portion formed at a position facing the other end side in the longitudinal direction of the reading portion so as to face the reading portion side. The document reading device according to claim 2, wherein a surface of the step portion facing the reading portion is used as the contacted portion.

The present invention according to claim 4 is the document reading device according to any one of claims 1 to 3, wherein the contact portion and the contacted portion are made of resin.

The present invention according to claim 5
With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
Have,
The positioning mechanism
The reading portion is arranged on one end side in the longitudinal direction of the reading portion, and the reading portion is pressed in a direction in which a first contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. The first means of urging and
A second urging means for urging the reading unit in a direction in which the second contact portion arranged at a position facing the base member of the reading unit is pressed against the base member.
It is a document reading device having.

According to the sixth aspect of the present invention, the first contact portion comprises a convex portion protruding toward the contacted portion, and the convex portion has a reading portion approaching the base member and the base. The document reading device according to claim 5, wherein the length in the second direction orthogonal to the first direction is shorter than the length in the first direction which is the direction away from the member.

The present invention according to claim 7
The first contact portion is composed of a convex portion protruding toward the contacted portion.
The document reading device according to claim 5, wherein the convex portion has a curved surface at a position where the contacted portion comes into contact with the contacted portion.

The present invention according to claim 8
With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
An image forming unit that forms an image based on the image signal of the document read by the scanning unit, and an image forming unit.
Have,
The positioning mechanism is arranged on one end side in the longitudinal direction of the reading portion, and the contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. It is an image forming apparatus having an urging means for urging a reading unit.

The present invention according to claim 9
With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
An image forming unit that forms an image based on the image signal of the document read by the scanning unit, and an image forming unit.
Have,
The positioning mechanism
The reading portion is arranged on one end side in the longitudinal direction of the reading portion, and the reading portion is pressed in a direction in which a first contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. The first means of urging and
A second urging means for urging the reading unit in a direction in which the second contact portion arranged at a position facing the base member of the reading unit is pressed against the base member.
It is an image forming apparatus having.

According to the first aspect of the present invention, it is possible to provide a document reading device capable of making it difficult to generate shavings as compared with a technique of positioning a document reading unit with respect to a base member using a screw. ..

According to the second aspect of the present invention, the number of parts of the apparatus can be reduced as compared with the apparatus in which the member used as the contacted portion is provided separately from the surface of the accommodating portion facing the reading portion.

According to the third aspect of the present invention, the strength of the storage portion can be increased as compared with the device in which the step portion is not formed, and an urging means having a strong urging force can be used.

According to the fourth aspect of the present invention, at least one of the contact portion and the contacted portion is caused by the contact portion and the contacted portion rubbing against each other as compared with a device made of other than resin such as metal. The amount of shavings that may be reduced can be reduced.

According to the fifth aspect of the present invention, it is possible to provide a document reading device capable of making it difficult to generate shavings as compared with a technique of positioning a document reading unit with respect to a base member using a screw. ..

According to the sixth aspect of the present invention, there is a device in which the length of the convex portion in the second direction is shorter than the length of the convex portion in the first direction, or the length of the convex portion in the second direction and the length of the convex portion are the first. It is possible to reduce the amount of shavings that may be generated by scraping the convex portion as compared with the device having the same length in the direction of.

According to the seventh aspect of the present invention, the position of the convex portion in contact with the contacted portion may be generated by scraping the convex portion as compared with a device having a non-curved surface such as a flat surface. The amount can be reduced.

According to the eighth aspect of the present invention, it is possible to provide an image forming apparatus capable of making it difficult to generate shavings as compared with a technique of positioning a document reading unit with respect to a base member using a screw. ..

According to the ninth aspect of the present invention, it is possible to provide an image forming apparatus capable of making it difficult to generate shavings as compared with a technique of positioning a document reading unit with respect to a base member using a screw. ..

It is a figure which shows the schematic structure of the image forming apparatus used in embodiment of this invention. It is a figure which shows the reading part which the image forming apparatus shown in FIG. 1 has. It is a figure which shows the document reading apparatus which the image forming apparatus shown in FIG. 1 has, and is the figure which shows the cross section of line AA shown in FIG. It is a figure which shows the BB line cross section in FIG. It is a figure which shows the CC line cross section in FIG. It is a figure which shows the DD line cross section in FIG. It is a figure which shows the part of FIG. 3 enlarged, and is the figure which shows the step part formed in the housing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an example of an image forming apparatus 10 used in the embodiment of the present invention. As shown in FIG. 1, the image forming apparatus 10 includes a document reading apparatus 100 and an output apparatus 800.

The output device 800 is a device that outputs an image to a recording medium such as paper, and has an output device main body 812, and the upper surface of the output device main body 812 discharges the recording medium on which the image is formed. It is used as a discharge unit 814. Further, an image forming unit 830 for forming an image on a recording medium is arranged in the output device main body 812.

The image forming unit 830 forms an image based on the image signal of the document read by the reading unit 140, which will be described later, and forms, for example, a monochromatic image by using, for example, an electrophotographic method. The image forming unit 830 includes a photoconductor drum 832 used as an image holder, a charging device 834 for charging the photoconductor drum 832, and a latent image forming unit that forms an electrostatic latent image on the surface of the photoconductor drum 832. 836, a developing device 838 that develops a latent image into a toner image, a transfer device 840 that transfers the toner image to a recording medium, a cleaning device 842 that cleans the surface of the photoconductor drum 832, and a toner image on a recording medium. It has a fixing device 844 for fixing the above.

In the above description, the image forming unit 830 has been described by showing a configuration adopting the electrophotographic method as an example, but the image forming unit 830 adopts a method other than the electrophotographic method such as an inkjet method. May be good. Further, in the above description, although the image forming unit 830 has been described by taking a configuration for forming a monochromatic image as an example, the image forming unit 830 may have a configuration for forming a multicolored image.

A supply device 900 is further arranged in the output device main body 812. The supply device 900 has a storage unit 902 that stores the recording media in a stacked state, and a supply roll 904 that supplies the recording media stored in the storage unit 902 toward the image forming unit 830.

Further, a transport path 950 is formed in the output device main body 812. The transport path 950 transmits the recording medium from the supply device 900 to the transfer device 840, further conveys the recording medium to the fixing device 844, and further discharges the recording medium to the discharge unit 814. Transport.

In the output device main body 812, along the transport path 950, the above-mentioned supply roll 904, the resist roll 952, the above-mentioned transfer device 840, and the above-mentioned fixing device 844 are arranged in this order from the upstream side in the recording medium transport direction. , Discharge roll 954 and the like are arranged.

The resist roll 952 temporarily stops the movement of the tip of the recording medium, and restarts the movement of the tip of the recording medium so that the image forming unit 830 coincides with the timing of forming the image.

The discharge roll 954 discharges the recording medium on which the toner image is fixed by the fixing device 844 to the discharge unit 814.

The document reading device 100 has a document reading device main body 112, and a base member 120 is mounted on the upper surface of the document reading device main body 112. The base member 120 is made of a light-transmitting material such as glass, and a document is placed on the upward surface of the base member 120.

The document reading device 100 further includes an opening / closing unit 122. The opening / closing unit 122 is attached to the document reading device main body 112 by using the hinge 124, and is opened when the document is placed on the base member 120 or when the document placed on the base member 120 is removed to read the document. Closed to.

The document reading device 100 further includes a reading unit 140. The reading unit 140 optically reads the document placed on the base member 120. The details of the reading unit 140 will be described later.

The document reading device 100 further includes a housing 200. The housing 200 is an example of a storage unit in which the reading unit 140 is housed, and moves with respect to the base member 120 integrally with the reading unit 140. The arrow a indicates the moving direction of the reading unit 140 and the housing 200. The details of the housing 200 will be described later.

The document reading device 100 further includes a drive source 126 and a drive transmission mechanism 128. As the drive source 126, for example, a motor or the like can be used. The drive transmission mechanism 128 transmits the drive of the drive source 126 to the reading unit 140 and the housing 200, and moves the reading unit 140 and the housing 200 in the direction of arrow a. As the drive transmission mechanism 128, for example, a gear train composed of a plurality of gears, a mechanism provided with a belt for transmitting drive between the plurality of pulleys and the plurality of pulleys, and the like can be used.

FIG. 2 shows an example of the reading unit 140. As shown in FIG. 2, the reading unit 140 has a reading unit main body 142, and a light transmitting member 144 formed of a light-transmitting material such as glass on the upward surface of the reading unit main body 142. Is installed. Further, in the reading unit main body 142, the light from the LDE (Light Emitting Side) irradiation heads 146 and 146 used as the irradiation unit for irradiating the document with light and the LDE irradiation heads 146 and 250 are imaged. A lens array 148 used as an imaging unit and a photoelectric conversion member 150 to which the light imaged by the lens array 148 is incident are mounted.

The photoelectric conversion member 150 is used as an image data generation means for generating image data by reading the light emitted from the LED irradiation heads 146 and 146 and reflected by the document D placed on the base member 120, and is used as a CCD array. Is used, and has a substrate 152 used for power distribution, etc., and a plurality of light receiving sensors 154 are linearly arranged on the surface of the substrate 152 on the lens array 148 side in the width direction of the document D (direction orthogonal to the paper surface in FIG. 2). It is mounted in a shape.

FIG. 3 is a diagram showing a document reading device 100, and is a diagram showing a cross section taken along line AA shown in FIG. As shown in FIG. 3, the document reading device 100 further includes a guide unit 130. The guide portion 130 is made of, for example, a rail-shaped member, and the housing 200 is movably mounted to guide the movement of the housing 200 and the reading portion 140 in the arrow a direction.

The document reading device 100 further includes a positioning mechanism 300. The positioning mechanism 300 is a mechanism for positioning the reading unit 140 with respect to the base member 120, and is a front positioning member located on the front side (lower side in FIG. 3 and front side of the paper surface in FIG. 1) of the image forming apparatus 10. It has a 310F and a rear positioning member 310R located on the rear side (upper side in FIG. 3 and the back side of the paper surface in FIG. 1) of the image forming apparatus 10.

The front positioning member 310F is fixed to the front end of the reading unit 140, and the rear positioning member 310R is fixed to the rear end of the reading unit 140. Details of the front positioning member 310F and the rear positioning member 310R will be described later.

The positioning mechanism 300 further includes an urging means 370F and an urging means 370R. As the urging means 370F and the urging means 370R, for example, a coil spring or the like can be used. Further, the upper end portions of the urging means 370F and the urging means 370R are mounted on the lower surface of the reading unit 140 (see FIG. 4), and the lower end portions of the urging means 370F and the urging means 370R are It is mounted on the upward surface of the housing 200 (see FIG. 4).

The urging means 370F and the urging means 370R configured as described above urge the reading unit 140 upward, that is, in the direction of the base member 120.

The positioning mechanism 300 further includes an urging means 350. The urging means 350 is arranged on one end side (rear end side, upper side in FIG. 3) of the reading unit 140 in the longitudinal direction, and covers the side surface side convex portion 312 (see FIGS. 4 and 5) described later. This is an example of an urging means for urging the reading unit 140 in the direction of the arrow b, which is the direction in which the reading unit 140 is pressed against the contact portion (for example, the surface 212 described later, see FIG. 5).

FIG. 4 is a diagram showing a cross section taken along line BB shown in FIG. 3, and FIG. 5 is a diagram showing a cross section taken along line CC shown in FIG. As shown in FIGS. 4 and 5, the front positioning member 310F has a side convex portion 312. The side surface side convex portion 312 is an example of a contact portion and also an example of a first contact portion, which is provided on the front end portion side in the longitudinal direction of the reading portion 140, and the urging means 350 is provided on the reading portion 140. By urging the housing 200 toward the front side, the housing 200 is pressed against the surface 212, which is a surface facing the side convex portion 312 of the housing 200.

As can be seen from the above description, the surface 212, which is the surface of the housing 200 facing the side convex portion 312, is an example of the contacted portion to which the side convex portion 312 is pressed.

In the image forming apparatus 10 configured as described above, the reading unit 140 is urged toward the front side by the urging means 350, and the side surface side convex portion 312 is pressed against the surface 212 in the longitudinal direction. , The reading unit 140 is positioned with respect to the base member 120. Therefore, as compared with the technique of positioning the reading unit 140 with respect to the base member 120 using, for example, a metal screw or the like, there is a possibility that the metal screw or the like may come into contact with another member. The amount of waste can be reduced.

The side convex portion 312 is in the first direction from the length L1 which is the length in the vertical direction which is the first direction in which the reading unit 140 approaches the base member 120 and separates from the base member 120. The length L2, which is the length in the left-right direction, which is the second orthogonal direction, is shortened. Therefore, as compared with a device having a length L2 longer than the length L1 or a device having the same length L1 and the length L2, the side convex portion when the reading unit 140 moves up and down. It is possible to reduce the amount of shavings that may be generated by the wear of the 312.

Further, the side surface side convex portion 312 has a curved surface 314 at a position where it contacts the surface 212. Therefore, the position where the side convex portion 312 comes into contact with the surface 212 is caused by wear of the side convex portion 312 when the reading unit 140 moves up and down as compared with a device having a non-curved surface such as a flat surface. The amount of shavings that may be reduced can be reduced.

The front positioning member 310F further has, for example, two upper convex portions 318. The upper convex portion 318 is an example of a second contact portion arranged at a position facing the base member 120, and is in contact with the base member 120, and the reading portion 140 is moved upward by the urging means 370F and the urging means 370R. When urged toward, it is pressed against the base member 120.

The rear positioning member 310R also has, for example, two upper convex portions 318 (see FIGS. 1 and 6), similarly to the front positioning member 310F.

In the image forming apparatus 10 configured as described above, when the reading unit 140 is urged upward by the urging means 370F and the urging means 370R, the upper convex portion 318 of the front side positioning member 310F and the upper convex portion 318. The upper convex portion 318 of the rear positioning member 310R is pressed against the base member 120 against the downward surface, and the reading portion 140 is positioned with respect to the base member 120 in the vertical direction.

FIG. 6 is a diagram showing a cross section taken along line DD shown in FIG. As described above, the rear positioning member 310R has an upper convex portion 318. Further, one end of the above-mentioned urging means 350 is attached to the inner surface of the housing 200, and the other end is attached to the rear end of the reading unit 140.

FIG. 7 is an enlarged view of a part of FIG. 3, and is a diagram for explaining the shape of the front side of the housing 200. As shown in FIG. 7, in the housing 200, a step portion 214 is formed at a position facing the front end portion side in the longitudinal direction of the reading portion 140 so as to face the reading portion 140 side, and the side surface side convex portion 312 is formed. As the contacting portion with which the surface 212 is in contact, the portion where the stepped portion 214 of the surface 212 is formed is used.

By forming the stepped portion 214, the strength of the housing 200 can be increased as compared with the device in which the stepped portion 214 is not formed, and the urging force is increased as compared with the device in which the stepped portion 214 is not formed. The strong urging means 350 can be used.

10: Image forming device 100: Original reading device 120: Base member 140: Reading unit 200: Housing 212: Surface 214: Step portion 300: Positioning mechanism 310F: Front side positioning member 310R: Rear side positioning member 312: Side surface side Convex part 314: Curved surface 318: Upper convex part 350: Biasing means 370F: Biasing means 370R: Biasing means 830: Image forming part

Claims (8)

With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
Have,
The positioning mechanism is arranged on one end side in the longitudinal direction of the reading portion, and the contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. It has an urging means to urge the reading unit,
The reading unit is housed, and further has a storage unit that moves with respect to the base member integrally with the reading unit.
The accommodating portion is formed with a step portion facing the reading portion side at a position facing the other end side in the longitudinal direction of the reading portion, and the step portion is formed as the contacted portion of the step portion. A document reading device in which a surface facing the reading unit is used. The document reading device according to claim 1, wherein the contact portion and the contacted portion are made of resin. With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
Have,
The positioning mechanism
The reading portion is arranged on one end side in the longitudinal direction of the reading portion, and the reading portion is pressed in a direction in which a first contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. The first means of urging and
A second urging means for urging the reading unit in a direction in which the second contact portion arranged at a position facing the base member of the reading unit is pressed against the base member.
Have,
The first contact portion is composed of a convex portion protruding toward the contacted portion.
The convex portion has a length in a second direction orthogonal to the first direction rather than a length in a first direction in which the reading portion approaches the base member and separates from the base member. Document reader with short length. With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
Have,
The positioning mechanism
Be arranged on one end side in the longitudinal direction of the reading unit, the reading unit the reading portion of the first contact portion in a direction to press against the contacted portion was found provided on the other end side in the longitudinal direction of the The first means of urging
A second urging means for urging the reading unit in a direction in which the second contact portion arranged at a position facing the base member of the reading unit is pressed against the base member.
Have,
The first contact portion is composed of a convex portion protruding toward the contacted portion.
A document reading device in which the convex portion is formed in a curved surface in a direction away from the base member, and the position of contact with the contacted portion is a curved surface. The second contact portion is composed of a convex portion protruding toward the contacted portion.
The document reading device according to claim 4, wherein the convex portion has a curved surface at a position where it contacts the base member. With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
An image forming unit that forms an image based on the image signal of the document read by the scanning unit, and an image forming unit.
Have,
The positioning mechanism is arranged on one end side in the longitudinal direction of the reading portion, and the contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. It has an urging means to urge the reading unit,
The reading unit is housed, and further has a storage unit that moves with respect to the base member integrally with the reading unit.
The accommodating portion has a stepped portion formed at a position facing the other end side in the longitudinal direction of the reading portion so as to face the reading portion side, and the stepped portion serves as the contacted portion. An image forming apparatus in which a surface facing the reading unit is used. With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
An image forming unit that forms an image based on the image signal of the document read by the scanning unit, and an image forming unit.
Have,
The positioning mechanism
The reading portion is arranged on one end side in the longitudinal direction of the reading portion, and the reading portion is pressed in a direction in which a first contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. The first means of urging and
A second urging means for urging the reading unit in a direction in which the second contact portion arranged at a position facing the base member of the reading unit is pressed against the base member.
Have,
The first contact portion is composed of a convex portion protruding toward the contacted portion.
The convex portion has a length in a second direction orthogonal to the first direction rather than a length in a first direction in which the reading portion approaches the base member and separates from the base member. An image forming device with a short length. With the base member
A reading unit that reads a document placed on the base member,
A positioning mechanism for positioning the reading unit with respect to the base member,
An image forming unit that forms an image based on the image signal of the document read by the scanning unit, and an image forming unit.
Have,
The positioning mechanism
The reading portion is arranged on one end side in the longitudinal direction of the reading portion, and the reading portion is pressed in a direction in which a first contact portion provided on the other end side in the longitudinal direction of the reading portion is pressed against the contacted portion. The first means of urging and
A second urging means for urging the reading unit in a direction in which the second contact portion arranged at a position facing the base member of the reading unit is pressed against the base member.
Have,
The first contact portion is composed of a convex portion protruding toward the contacted portion.
An image forming apparatus in which the convex portion is formed in a curved surface in a direction away from the base member, and the position of contact with the contacted portion is a curved surface.

Images