JP2003078256A - Joining structure of scanner frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining structure of a scanner frame that can inhibit the deformation in a scanner frame that is provided in a copying machine having a discharge section for discharging paper where an image is copied directly below a scanner section for reading images on originals. SOLUTION: Mounting pieces 831 are provided at two places in front and back directions, where the mounting pieces are extended at a lower section nearly in parallel with a right-side frame 48 of a body frame 45 from an appropriate place at the inner side of a right-side plate 83 of a scanner frame 8. The mounting pieces 831 are joined to the right-side frame 48 by screws 50, and the right-side plate 83 of the scanner frame 8 is fixed to the right-side frame 48 having large stiffness in up and down directions of the main frame 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine of a type having a discharging section for discharging a sheet on which an image is copied, right below a scanner section for reading an image of an original, and more particularly, it is arranged above a main body frame. The present invention relates to a scanner frame fastening structure for fastening a substantially rectangular scanner frame to its main body frame.

[0002]

2. Description of the Related Art In a copying machine of a type that has a discharge section for discharging a sheet of a copy of an image just below a scanner section for reading an image of an original, it is usually necessary to make it easy to take out the sheet discharged to the discharge section. As shown in FIG. 7, the discharge portion S of the main body frame 100 is viewed from the normal operation position.
With respect to the right side portion, a frame 101 is provided on the back side to form a space 102 for taking out the sheet on the front side. From this relationship, with respect to this portion, the right side of the scanner frame 103 provided in the scanner unit is attached to and supported by the main body frame 100 on the back side.

In this case, conventionally, as shown in FIGS. 7 and 8, the right side of the scanner frame 103 is placed above the main body frame 100, and the bottom plate 104 of the scanner frame 103 and the main body frame are mounted. Of the 100, the flange portion 105 facing the bottom plate 104 is fastened by a fastening member 106 such as a screw.

[0004]

However, in the conventional fastening structure as described above, since the right side plate 107 of the scanner frame 103 is separated from the fastening position, a load is applied to the scanner frame 103 from above. A right side front portion 108 of the scanner frame 103 which is not supported by the frame 100 sinks downward due to the load, while a right side plate 107 of the scanner frame 103.
The back side of the scanner floats upward as shown in FIG. 9, and the scanner frame 103 may be twisted and deformed. The scanner frame 103 is provided with a mirror and CCD that require positional accuracy.
When 03 is deformed as described above, the mounting positions of these members may be displaced, which may affect the image reading accuracy.

The present invention has been made in view of the above,
Provided is a scanner frame fastening structure capable of suppressing deformation of a scanner frame provided in a copying machine in a type of a copying machine having a discharge section for discharging a sheet on which an image is copied, just below a scanner section for reading an image of an original. The purpose is to

[0006]

According to a first aspect of the present invention, a scanner frame having a substantially rectangular parallelepiped shape is fastened to the main body frame above a sheet discharge space formed by being laterally surrounded by the main body frame. In the fastening structure, one side plate of the side plate of the scanner frame and the side plate of the main body frame, which are arranged on substantially the same plane, is integrally provided with a connecting portion parallel to the other side plate, and the connecting portion is formed. The scanner frame and the main body frame are fastened to each other by closely attaching to the other side plate.

According to this invention, one side plate of the side plate of the scanner frame and the side plate of the main body frame, which are arranged on substantially the same plane, is integrally provided with a connecting portion parallel to the other side plate, Since the scanner frame and the main body frame are fastened to each other by closely attaching the connecting portion to the other side plate, the side plate of the scanner frame is fixed by the side plate of the main body frame having a large vertical rigidity. Become. Therefore, this fastening structure
When applied to the fastening of the side plate of the scanner frame and the side plate of the main body frame adjacent to a part of this side plate, as compared with the conventional fastening structure, the above-mentioned adjacent part floats up due to the load from above or a part other than the adjacent part Subduction is suppressed.

According to a second aspect of the present invention, there is provided a fastening structure for fastening a scanner frame having a substantially rectangular parallelepiped shape to the main body frame above a paper discharge space formed by being laterally surrounded by the main body frame. The scanner frame and the main body frame are mounted on the side plates of the scanner frame and the side plate of the main body frame, which are arranged on substantially the same plane, by attaching a predetermined connecting body over the both side plates so as to be in close contact with the both side plates. And is concluded.

According to the present invention, a predetermined connecting member is provided on the side plates of the scanner frame and the side plate of the main body frame, which are arranged on substantially the same plane, so as to be in close contact with the both side plates. Since the scanner frame and the main body frame are fastened by mounting, the side plate of the scanner frame is fixed by the side plate of the main body frame which has a large rigidity in the vertical direction. Therefore, when this fastening structure is applied to the fastening of the side plate of the scanner frame and the side plate of the main body frame adjacent to a part of this side plate, the above-mentioned adjacent portion is lifted by the load from above as compared with the conventional fastening structure. And subsidence of parts other than adjacent parts is suppressed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The general structure of an embodiment in which the present invention is applied to a copying machine will be described below, and then the characteristic parts of the present invention will be described.

FIG. 1 is a perspective view showing the external structure of the copying machine 1, and FIG. 2 is a schematic view showing the schematic structure of the copying machine 1. In the following description, the front side when viewed from the normal operation position of the copying machine 1 (as viewed in the direction of arrow A in FIG. 1) is referred to as the front side of the copying machine.

As shown in FIG. 1, the copying machine 1 has an apparatus main body 2 and a document holder 3 mounted on the upper portion of the apparatus main body 2 so as to be openable and closable. The apparatus main body 2 is partitioned by a main body housing 4 and an upper housing 5 placed on the upper part thereof, and in the intermediate portion between the main body housing 4 and the upper housing 5, the paper P from the main body housing 4 to the right side A paper discharge unit 6 is formed to be discharged toward.

As shown in FIG. 2, the upper housing 5 includes
An image reading unit 7 for reading an image by exposing and scanning an original at an image reading position is built in. Image reading unit 7
Is a first rectangular parallelepiped scanner frame 8 (see FIG. 3) having first and second traveling frames 12 and 13 in which an optical system including an exposure lamp 9 and mirrors 10 and 11 is mounted, and a lens 1.
4 and a CCD line sensor 15 are arranged. The rail member 16 is attached to the front and rear side plates 81, 82 (see FIG. 3) of the scanner frame 8 with screws 17 (see FIG. 3), and the first and second traveling frames 12, 13 are attached to the rail member 1.
It is designed to travel back and forth while being guided by 6. The first traveling frame 12 includes an exposure lamp 9 that irradiates a document with light,
Mirror 1 for reflecting the reflected light from the document to the second traveling frame 13
0 and the second traveling frame 13 has the first traveling frame 12
It has a mirror 11 that reflects the reflected light from the CCD line sensor 15 toward the CCD line sensor 15.

Then, while the first and second traveling frames 12 and 13 are reciprocally moved in the left-right direction in FIG. 2 at a predetermined speed by a drive unit (not shown), an exposure lamp is applied to an original placed on the contact glass 18. By irradiating light at 9, and guiding the reflected light to the CCD line sensor 15 through the lens 14, the image information on the entire surface of the original is read.

The main body housing 4 is provided with a sheet feeding section 19 arranged at a lower portion, a first sheet conveying section 20 arranged above the sheet feeding section 19, and a first sheet conveying section 20 arranged above the first sheet conveying section 20. An image forming unit 21 provided, a fixing unit 22 arranged on the downstream side of the image forming unit 21 in the sheet conveying direction, and a second unit for conveying the fixed sheet and discharging it to the sheet discharging unit 6. The paper transport unit 23 is housed.

The sheet feeding section 19 causes the sheets P stacked in the sheet feeding cassettes 24 and 25 to be placed on the outlet side (left side in FIG. 1) of the sheet feeding cassettes 24 and 25 by the rotation operation of the sheet feeding rollers 26 and 27. The sheet P is conveyed one by one by feeding the uppermost sheets P one by one by feeding them out and separating them by the not-shown separating claws provided on the upper ends of the sheet feeding cassettes 24 and 25 in the width direction.
The paper is fed to 0.

The first sheet conveying section 20 conveys the sheet fed from the sheet feeding section 19 to the conveying roller pair 28 and the registration roller pair 2.
9. The pre-transfer guide 30 conveys the image toward the image forming unit 21.

The image forming section 21 has a photoconductive drum 31 which is rotatably supported by a shaft and which has photoconductivity. A charger 32, a laser scanning unit (around the photoconductive drum 31 along the rotation direction thereof). LSU) 33, a developing unit 34, a transfer unit 35, a cleaning unit 36, and a charge eliminating lamp 37, which forms a predetermined toner image on the photoconductor drum 31 by an electrophotographic process and transfers the toner image to a sheet. Is.

The charger 32 charges the photosensitive drum 31 to a constant polarity (positive polarity in this embodiment).

The laser scanning unit (LSU) 33 outputs laser light whose intensity is increased or decreased according to the image data of the original read by the image reading unit 7 from the laser light emitter 38, and the polygon mirror 39 and the reflecting mirror 40. Through
The exposure area of the photosensitive drum 31 that is positively charged is irradiated. By this irradiated laser light, the surface potential of the photoconductor drum 31 is reduced according to the image,
An electrostatic latent image corresponding to the original image data is formed on the surface of the photosensitive drum 31. This light irradiation is repeatedly scanned in the width direction of the rotating photosensitive drum 31 to the exposure area between the charger 32 and the developing unit 34 by the rotation of the polygon mirror 39.

The developing section 34 attaches the toner of the same polarity, that is, positively charged toner in the developing area to the portion of the electrostatic latent image on the photosensitive drum 31 where the positive charge is reduced (the potential is reduced) by the laser light. It is a thing. As a result, the electrostatic latent image formed on the photoconductor drum 31 is developed with the toner, and a toner image is formed as a visible image on the surface of the photoconductor drum 31.

The transfer device 35 is a transfer roller 4 which is arranged in a non-contact state in the transfer area of the photosensitive drum 31 so as to face each other.
1, the negative corona discharge from the back side of the paper,
The toner image formed on the photoconductor drum 31 is electrostatically transferred onto a sheet.

The cleaning section 36 urges the tip of a cleaning blade (not shown) to the surface of the photoconductor drum 31 by the urging force of the urging means (not shown) and attaches it to the surface of the photoconductor drum 31 after transfer. The residual toner that remains is scraped off.

Although not shown in detail, the charge eliminating lamps 37 include a plurality of Ls over the entire width of the photosensitive drum 31 in the width direction.
The ED lamps are arranged in one row or in a plurality of rows and arranged in an array, and the LED lamp light is applied to the surface of the photoconductor drum 31 to remove the residual charges of the photoconductor drum 31.

The fixing section 22 is arranged on the downstream side of the image forming section 21 in the sheet conveying direction. The sheet on which the toner image is transferred in the image forming section 21 is heated by a heating roller 42 having a heater therein and the heating roller 42. It is sandwiched by a pressure roller 43 which is pressed against 42 and is thermally pressed to fuse and fix the toner image on the sheet.

The second sheet conveying section 23 discharges the sheet P on which the image is formed by the image forming section 21 from the fixing section 22 to the sheet discharging section 6 via the pair of discharging rollers 44.

Next, a portion relating to the present invention will be described.

FIG. 3 is a perspective view showing a state in which the scanner frame 8 is attached to the main body frame as a framework of the apparatus main body 2.

As shown in FIG. 3, the scanner frame 8
Is a rectangular member having an opening on the upper surface, and as described above, the front and rear side plates 81, 8 of the scanner frame 8
On the inner surface of 2, a rail member 16 having a U-shaped cross section is attached.

As shown in FIG. 4, of the three surfaces of the rail member 16, two parallel surfaces 16a and 16b reciprocally travel the first and second traveling frames 12 and 13.
a and 16b, and the remaining surface 16c is a mounting surface 16c that is in close contact with the inner surfaces of the front and rear side plates 81 and 82 of the scanner frame 8, and the rail member 16 is mounted on the scanner frame 8 by this mounting surface 16c. Front and rear side plates 81, 8
It is attached to the No. 2 by screws 17 (see FIG. 3) substantially horizontally. The rail member 16 is not limited to the U-shaped section, but may be, for example, an L-shaped section.

Returning to FIG. 3, the main body frame 45 is a lower frame 46 for accommodating the paper feeding unit 19, the image forming unit 21, and the like.
And a left-side frame 47 for accommodating the second paper transport unit 23
And a right frame 48 extending from the lower frame 46
And a rear side frame (not shown) and a collar 49 extending inward from the upper end of the right frame 48 (see FIG. 5).
(See) and is configured. In addition, the paper discharge unit 6
Is formed by the upper surface 46a of the lower frame 46, the left frame 47, the right frame 48, and the rear frame that surround the sides.

The scanner frame 8 is a body frame 45.
It is mounted on the left frame 47 and the collar portion 49, and is attached and fixed to the main body frame 45 at two places on each of the left and right sides by screws 50. That is, on the left side, so that the right side plate 83 of the scanner frame 8 and the right side frame 48 of the main body frame 45 are arranged on substantially the same plane, the bottom plate 85 of the scanner frame 8 is placed at an appropriate position of the left side frame 47 of the main body frame 45. Fastened with screws 50 on the upper surface.

On the other hand, the right side is fastened as follows.

In the present embodiment, in order to make it easy to take out the paper discharged to the paper discharge section 6, as shown in FIG. 1, the right side wall 4a is provided on the right side of the main body housing 4 on the back side. , Space 4b for taking out paper on the near side
Are formed. From that relationship, as shown in FIG.
Since the right frame 48 is formed on the back side, the portion 8a on the right front side of the scanner frame 8 is formed on the main body frame 45.
Cannot be concluded. Therefore, the portion 8a on the right front side of the scanner frame 8 is more likely to be deformed in the direction of arrow B than other portions.

Therefore, in the present embodiment, as shown in FIGS. 3 and 5, a screw extending downward from the proper position on the right side plate 83 of the scanner frame 8 in a substantially parallel manner to the right side frame 48 of the body frame 45. Mounting piece 831 having hole 831a
(Corresponding to the connecting portion) is formed at two positions in the front-rear direction,
Correspondingly, the right side frame 48 of the body frame 45
A screw hole 48a is also formed in each of the screw holes 831a, 48
By screwing a screw 50 to a from the side to bring the mounting piece 831 into close contact with the right frame 48 of the main body frame 45, the right side plate 83 of the scanner frame 8 and the right side of the main body frame 45 arranged on substantially the same plane. The frame 48 is fastened. The number of mounting pieces 831 is two.
Not limited to one.

As described above, since the right side plate 83 of the scanner frame 8 is fixed to the right side frame 48 of the main body frame 45, the back side lifting of the right side plate 83 caused by the load applied from above the scanner frame 8 is suppressed. In addition, the right side plate 83 of the scanner frame 8 is supported by the right frame 48 having a large rigidity in the vertical direction, so that the right side portion of the scanner frame 8 has a high rigidity in the vertical direction and the vertical direction of the scanner frame 8 in the vertical direction. Torsional rigidity increases. As a result, as compared with the conventional fastening structure, the portion 8a on the right front side of the scanner frame 8 is less likely to sink in the direction of arrow B, and the deformation of the scanner frame 8 can be suppressed.

In the first embodiment, the attachment piece 8 is integrally formed from the proper position of the right side plate 83 of the scanner frame 8.
31 is formed and fastened to the main body frame 45, the mounting piece 831 is not formed, and as a second embodiment, as shown in FIG. 6, the right side plate 83 of the scanner frame 8 and the main body are connected. The right frame 48 of the frame 45 may be indirectly fastened via a predetermined fastening member 51.

That is, the right side plate 8 of the scanner frame 8
3 has screw holes 83a formed at appropriate positions, and screw holes 48a are also formed in the right frame 48 of the main body frame 45. For example, a plate-shaped fastening member 51 having screw holes 51a and 51b on the upper and lower sides is provided from the side. By screwing the screws 50 and 50 'into the screw holes 51a, 83a and 51b, 48a, the screws 50 and 50' are brought into close contact with the right side plate 83 and the right frame 48, and the right side plate 83 of the scanner frame 8 arranged on substantially the same plane.
Even if the right frame 48 of the main body frame 45 is fastened, the same operation as in the first embodiment can be obtained.

In the first and second embodiments, the screw is used to fasten the attachment piece 831 and the fastening member 51, but the invention is not limited to this, and an adhesive or the like may be used.

Further, in the first embodiment, the present invention is applied to the fastening structure of the scanner frame provided in the copying machine. However, the present invention is not limited to this, and the scanner frame provided in an image reading apparatus such as a facsimile apparatus or a scanner apparatus is not limited thereto. It can be applied to a fastening structure.

[0041]

According to the present invention, one side plate of the side plate of the scanner frame and the side plate of the main body frame, which are disposed on substantially the same plane, is integrally provided with a connecting portion parallel to the other side plate, Since the scanner frame and the main body frame are fastened to each other by closely attaching the connecting portion to the other side plate, the side plate of the scanner frame is supported by the side plate of the main body frame having a large vertical rigidity. Therefore, in the fastening portion between the side plate of the scanner frame and the side plate of the main body frame adjacent to a part of this side plate, as compared with the conventional fastening structure, the above-mentioned adjacent part is lifted by the load from above or the part other than the adjacent part is Subduction can be suppressed.

Further, according to the present invention, a predetermined connecting body is attached to the both side plates from the side of the side plate of the scanner frame and the side plate of the main body frame which are arranged on substantially the same plane, straddling the both side plates. Since the scanner frame and the main body frame are fastened together by being attached, the side plate of the scanner frame is supported by the side plate of the main body frame having a large rigidity in the vertical direction. As compared with the conventional fastening structure, it is possible to suppress the floating of the adjacent portion and the sinking of the portion other than the adjacent portion due to the load from above, in the portion of the main frame that is adjacent to the side plate and the side plate.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external configuration of a copying machine.

FIG. 2 is a schematic diagram showing a schematic configuration of a copying machine.

FIG. 3 is a perspective view showing how the scanner frame is attached to the main body frame.

FIG. 4 is an explanatory view of a mounting state of a rail member.

FIG. 5 is a cross-sectional view of a fastening structure according to the present invention.

FIG. 6 is a cross-sectional view of another embodiment of the fastening structure according to the present invention.

FIG. 7 is an explanatory diagram of a conventional technique.

FIG. 8 is an explanatory diagram of a conventional technique.

FIG. 9 is an explanatory diagram of problems in the conventional technology.

[Explanation of symbols]

4 body housing 4a right side wall 4b Space for taking out paper 8 scanner frames 8a Right front part 83 Right side plate 831 mounting piece 45 body frame 48 right frame 49 Tsuba 51 Fastening member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tadashi Teranishi             Kyocera 1-22-28 Tamatsukuri, Chuo-ku, Osaka-shi             Within Mita Co., Ltd. (72) Inventor Masayuki Nishi             Kyocera 1-22-28 Tamatsukuri, Chuo-ku, Osaka-shi             Within Mita Co., Ltd. F term (reference) 2H071 AA26 DA02 DA24 EA04 EA06                 4E360 AB12 AB51 ED02 ED07 ED27                       GA11 GA53 GB48                 5B047 AA01 BA02 BB02 BC20                 5C072 AA01 BA13 MA04

Claims (2)

[Claims] 1. A fastening structure for fastening a substantially rectangular scanner frame to the body frame above a sheet discharge space formed by being laterally surrounded by the body frame, the fastening structure being disposed on substantially the same plane. Further, by connecting one side plate of the side plate of the scanner frame and the side plate of the main body frame with a connecting part parallel to the other side plate, and by attaching the connecting part to the other side plate in close contact with each other, A fastening structure for a scanner frame, characterized in that a scanner frame and a main body frame are fastened together. 2. A fastening structure for fastening a scanner frame having a substantially rectangular parallelepiped shape to the main body frame above a sheet discharge space formed by being laterally surrounded by the main body frame, and arranged on substantially the same plane. The scanner frame and the body frame are fastened to each other by attaching a predetermined connecting body from the side of the side plate of the scanner frame and the side plate of the body frame to the both side plates in close contact with each other. The scanner frame fastening structure.