JP2003075934A - Positioning structure of optical rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning structure of optical rails which is capable of positioning the optical rails to the side plates of a scanner frame with high accuracy without degrading the traveling properties of a traveling frame. SOLUTION: Salient boss sections 8c having a columnar shape are formed at the proper points of the front and rear side plates 81 and 82 of the scanner frame 8 consisting of galvanized steel and on the other hand, circular hole sections 16d of the diameter approximately equal to the diameter of the columnar sections of the boss sections 8c are formed to the rail members 16 constituted by using stainless steel sheets and the boss sections 8c and the circular hole sections 16d are fitted to each other, by which the rail members 16 are positioned to the front and rear side plates 81 and 82.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical rail positioning structure for positioning an optical rail for guiding a traveling operation of a traveling frame having an optical system for reading an original on a side plate of a scanner frame.

[0002]

2. Description of the Related Art For example, a scanner unit for reading an original image of a copying machine or a facsimile apparatus includes an optical system including a scanner frame, a light source for illuminating an original and a mirror for guiding reflected light to a photosensitive drum or the like. With the traveling frame to be mounted,
And a rail member that guides the traveling operation of the traveling frame.

The rail member is formed, for example, in an L-shaped cross section. In this case, one surface serves as a running surface for guiding the running operation of the running frame and the other surface serves as a mounting surface for mounting on the scanner frame. It has become.

When the rail member is mounted on the side plate of the scanner frame, the rail member is mounted in a state of being positioned on the side plate, and the positioning is performed by forming a boss portion having a cylindrical shape, for example, at an appropriate position on the mounting surface of the rail member. Meanwhile,
A hole having substantially the same diameter as the boss is formed on the side plate of the scanner frame, and the boss and the hole are fitted to each other.

As shown in FIG. 9 (a), the boss portion has a rail member 101 mounted on a mold 100 having a groove 100a corresponding to the shape of the boss portion, and as shown in FIG. 1
The rail member 101 by the pressing member 102 having 02a.
By pressing toward the mold 100, the rail member 101 is formed at an appropriate position as shown in (c).

[0006]

The traveling frame is provided with a protruding slider made of synthetic resin or the like, and is configured to travel while slidingly contacting the traveling surface of the rail member through the slider. In that case, the rail member may be composed of, for example, a stainless steel plate in view of the traveling property (sliding property) of the traveling frame, but the material such as the stainless steel plate adopted for the rail member is ductile. However, it is difficult to form the boss portion 101a with high accuracy on the rail member made of a stainless steel plate or the like by the above-described processing method. If the boss 101a is not formed with high precision, the relative position of the rail member to the side plate of the scanner frame, and hence the position of the traveling frame, may deviate from the proper position, which may affect the image reading accuracy. .

The present invention has been made in view of the above,
An object of the present invention is to provide an optical rail positioning structure capable of accurately positioning an optical rail (rail member) on a side plate of a scanner frame without deteriorating the traveling property of a traveling frame.

[0008]

According to a first aspect of the present invention, there is provided an optical rail for guiding a traveling operation of a traveling frame, which is constructed by using a first steel plate and has an optical system for reading an original, In a positioning structure of an optical rail for positioning on a side plate of a substantially rectangular scanner frame formed by using a second steel plate having a ductility higher than that of the first steel plate, the scanner frame is attached to the side plate of the scanner frame. A boss for positioning the relative position of the optical rail with respect to the optical rail, a hole corresponding to the boss is formed in the optical rail, and the optical rail is fixed to the scanner frame by fitting the boss and the hole. It is characterized in that it is positioned on the side plate of.

According to the present invention, the boss portion is formed with high precision because the boss portion is formed on the side plate of the scanner frame which is constructed by using the second steel plate having higher ductility than the optical rail. Therefore, when the boss portion and the hole formed in the optical rail are fitted together, the optical rail is accurately positioned on the side plate of the scanner frame.

According to the invention of claim 2, claim 1
In the optical rail positioning structure described in (1), the tip of the boss portion is formed in a tapered shape.

According to the present invention, since the tip of the boss portion is formed in a tapered shape, when the boss portion of the scanner frame and the hole portion of the optical rail are fitted, the fitting operation of the optical rail is performed by the tapered portion. Will be guided. This allows
The workability of attaching the optical rail to the scanner frame is improved.

According to the invention of claim 3, claim 1
Alternatively, in the optical rail positioning structure according to 2,
A holding portion for temporarily holding the optical rail near the side plate of the scanner frame is provided on the side plate of the scanner frame.

According to the present invention, the side plate of the scanner frame is provided with the holding portion for temporarily holding the optical rail near the side plate of the scanner frame. It can be temporarily held near the side plate of the scanner frame. As a result, the workability of attaching the optical rail to the scanner frame is further improved.

In this case, if the holding portion is formed integrally with the scanner frame (claim 4), it is possible to avoid an increase in the number of parts due to the provision of the holding portion. As an example of the structure in which the holding portion is integrally formed with the scanner frame, it is preferable that a part of the side plate of the scanner frame is cut and raised (claim 5).

Then, for example, when the rail member is made of a stainless steel plate and the scanner frame is made of a galvanized steel plate, the invention according to any one of claims 1 to 5 is applied. Good (Claim 6).

[0016]

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 side 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 and a second traveling frame in which an optical system including an exposure lamp 9 and mirrors 10 and 11 is mounted in a substantially rectangular scanner frame 8 (see FIG. 3) made of a galvanized steel plate. 12, 13, a lens 14, a CCD line sensor 15 and the like are arranged. On the inner surfaces of the front and rear side plates 81, 82 (see FIG. 3) of the scanner frame 8, a rail member 16 made of a stainless steel plate is attached to the screw 1
Mounted by the first and second traveling frames 12, 13
While being guided by the rail member 16, the vehicle runs back and forth while slidingly contacting via a slider (not shown) made of synthetic resin and having a projection shape (see FIG. 3).

The first traveling frame 12 comprises an exposure lamp 9 for irradiating the original with light and a mirror 10 for reflecting the reflected light from the original to the second traveling frame 13, and the second traveling frame 13 ,
The CCD line sensor 15 detects the reflected light from the first traveling frame 12.
It has a mirror 11 which reflects toward.

The first and second traveling frames 1 are driven by an unillustrated drive unit.
While reciprocating 2 and 13 in the left-right direction of FIG. 2 at a predetermined speed, the original placed on the contact glass 18 is irradiated with light by the exposure lamp 9, and the reflected light is passed through the lens 14 to the CCD line. By guiding the image to the sensor 15, the image information on the entire surface of the document is read.

As shown in FIGS. 1 and 2, the main body housing 4 is provided with a paper feed portion 19 disposed at the lower portion, and the paper feed portion 19.
A first sheet transporting section 20 disposed above the image forming section 21, an image forming section 21 disposed above the first sheet transporting section 20, and a downstream side of the image forming section 21 in the sheet transporting direction. The lower housing 23, which houses the fixing unit 22, and the connecting housing 25, which houses the second paper carrying unit 24 for carrying the paper after fixing and discharging the paper to the paper discharging unit 6, are partitioned.

The paper feed unit 19 sends out the paper P stacked in the paper feed cassette 26 to the exit side (left side in FIG. 1) of the paper feed cassette 26 by the rotation operation of the paper feed roller 27, and The uppermost sheet P is fed to the sheet transporting unit 20 one by one by being separated by a not-shown separating claw provided on both upper ends of the width direction 26.

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 includes a photoconductive drum 31 which is rotatably supported by a shaft and which has photoconductivity, and 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 a laser beam R, which has been changed in intensity according to the image data of the original read by the image reading section 7, from a laser emitter 38, and a polygon mirror 39 and a reflecting mirror. It irradiates the exposed area of the photosensitive drum 31 which is positively charged via 40. The irradiated laser beam R reduces the surface potential of the photosensitive drum 31 according to the image, and forms an electrostatic latent image according to the original image data on the surface of the photosensitive drum 31. This light irradiation is performed by the rotation of the polygon mirror 39 and the charger 32 and the developing unit 34.
The exposure area between the two is repeatedly scanned in the width direction of the rotating photosensitive drum 31.

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 beam R. It is what makes me. 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 performs a negative corona discharge from the back surface of the paper by the transfer roller 41 arranged in the transfer area of the photoconductor drum 31, so that the toner image formed on the photoconductor drum 31 is statically discharged. It is electrically transferred onto paper.

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 static elimination lamps 37 are provided with a plurality of Ls over the entire area 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, and the sheet on which the toner image has been 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 24 is for ejecting the sheet P on which the image is formed by the image forming section 21 from the fixing section 22 to the sheet ejection section 6 via the ejection roller pair 44.

Next, the part relating to the present invention will be described. 3 is an overall perspective view of the scanner frame 8, FIG.
FIG. 4 is a sectional view of a front side plate 8a portion of the scanner frame 8.

As shown in FIGS. 3 and 4, a rail member 16 having a U-shaped cross section is attached to the inner surfaces of the front and rear side plates 81 and 82 of the scanner frame 8 and is made of a stainless steel plate. Of the three surfaces of the rail member 16, two parallel surfaces 16a and 16b allow the first and second traveling frames 12 and 13 to travel back and forth (hereinafter referred to as traveling surface 16).
a, 16b) and the remaining surface 1
6c is a mounting surface (hereinafter, referred to as mounting surface 16c) that closely contacts the inner surfaces of the front and rear side plates 81, 82 of the scanner frame 8, and the rail member 16 is the front and rear side plate 8 of the scanner frame 8.
The screws 1 and 82 are attached substantially horizontally. The holes 81b and 82b shown in FIG. 3 are screw holes into which the screw 17 is screwed, and the front and rear side plates 81 and 82 are provided.
Are formed in the vicinity of the left and right end portions and in the central portion.

In this embodiment, the rail member 16 is connected to the front and rear side plates 81, 82 of the scanner frame 8 as described above.
The structure is characterized in that the rail member 16 is positioned with respect to the front and rear side plates 81, 82 when the rail member 16 is attached to the front and rear side plates 81, 82.

That is, in this embodiment, as shown in FIG.
As shown in FIG. 4, a boss portion 8c having a cylindrical portion is formed on both left and right sides and a central portion of the front and rear side plates 81, 82 of the scanner frame 8 formed by using a galvanized steel plate, while a stainless steel plate is formed. The rail member 16 made of a steel plate is formed with a circular hole portion 16d having substantially the same diameter as the cylindrical portion of the boss portion 8c, and the front and rear side plates are fitted by fitting the boss portion 8c and the circular hole portion 16d. The rail member 16 is positioned with respect to 81 and 82. As described above, since the boss portion 8c is formed on the scanner frame 8 configured by using the galvanized steel sheet having higher ductility than the stainless steel sheet, the rail configured by using the stainless steel sheet having lower ductility than the galvanized steel sheet. The boss portion 8c can be formed with higher precision than in the conventional case where the boss portion 8c is formed on the member 16, and the rail member 16 can be positioned with high precision with respect to the front and rear side plates 81, 82. Therefore, the mounting position accuracy of the rail member 16 can be improved without deteriorating the traveling properties of the first and second traveling frames 12 and 13.

Further, in this embodiment, the tip portion of the boss portion 8c is formed in a conical shape. That is, the boss portion 8c
Since the diameter of the cylindrical portion and the diameter of the circular hole portion 16d are substantially the same, when the tip portion of the boss portion 8c is not formed in a tapered shape, the center position P of the boss portion 8c and the circular hole portion 1 are
The boss portion 8c and the circular hole portion 16d can be fitted only when the center position of 6d (the position of Q in FIG. 5) is substantially matched. However, like the present embodiment, the boss portion 8c can be fitted. When the tip portion is formed in a tapered shape, as shown in FIG. 5, if the center position (tip) P of the boss portion 8c is located within the region L of the circular hole portion 16d, the center position P of the boss portion 8c and the circular shape are circular. Even if the center position Q of the hole 16d does not substantially coincide with each other, the rail member 16 is substantially aligned with each other when the rail member 16 is moved to the scanner frame 8 side (direction of arrow B). 16 is the conical peripheral surface 8 at the tip of the boss 8c
Guided by c ′, as shown in FIG. 6, the cylindrical portion of the boss portion 8c and the circular hole portion 16d are fitted together. This makes it easy to fit the boss portion 8c and the circular hole portion 16d,
As a result, the workability of attaching the rail member 16 to the scanner frame 8 can be improved.

Further, in this embodiment, as shown in FIG. 4, a holding portion 8d for temporarily holding the rail member 16 in a substantially horizontal state near the front and rear side plates 81, 82 is formed. The holding portion 8d is formed by cutting and raising the portions of the front and rear side plates 81, 82 of the scanner frame 8 near the respective ends inward, and the long rail member 16 is temporarily held in a substantially horizontal state. As described above, the holding portion 8d includes the side plates 81,
Two of them are formed on each 82 at a predetermined interval. In that case, in the height direction, the holding portion 8d is
When the rail member 16 is temporarily held, the tip of the boss portion 8c is formed so as to be located within the region L of the circular hole portion 16d of the rail member 16.

Therefore, in the present embodiment, the rail member 16 is held by the holding portion 8d and the boss portion 8c and the circular hole portion 16d are aligned with each other in the horizontal direction (longitudinal direction). The rail member 16 is positioned on the scanner frame 8 by fitting the boss portion 8c and the circular hole portion 16d by simply moving the rail member 16 to the frame 8 side.
As a result, the work of fitting the boss 8c and the circular hole 16d can be performed more easily, and the workability of attaching the rail member 16 to the scanner frame 8 can be further improved.

The tip shape of the boss portion 8c is not limited to the conical shape, and may be a tapered shape.

Further, in the first embodiment, in order to avoid an increase in the number of parts, the front and rear side plates 81 of the scanner frame 8,
Although the holding portion 8d is formed by cutting and raising an appropriate portion of 82 inward, the holding portion 8d is not necessarily formed integrally with the scanner frame 8, and the holding portion 8d may be configured by attaching another member.

Further, in the first embodiment, the rail member 16
Front and rear side plates 81 of the scanner frame 8 on the mounting surface 16c of the
Although it is attached to the front and rear side plates 81 and 82, the opening side may face downward as shown in FIG. Further, as the rail member for guiding the traveling operation of the traveling frame, the rail member formed in the U-shaped cross section is used in the first embodiment, but it may be formed in the L-shaped cross section as shown in FIG. .

The materials for the rail member 16 and the scanner frame 8 are not limited to stainless steel plates and galvanized steel plates. For example, the scanner frame 8 is made of SPCC.
(Steel Plate Cold Commercial) may be used. In short, the present invention can be applied when the material of the scanner frame 8 is superior to the material of the rail member 16 in terms of ductility.

Further, in the first embodiment, the present invention is applied to the optical rail provided in the copying machine, but the present invention is not limited to this.
It can be applied to an optical rail provided in an image reading device such as a facsimile device or a scanner device.

[0046]

According to the present invention, the boss portion is formed with high accuracy because the boss portion is formed on the side plate of the scanner frame which is formed by using the second steel plate having higher ductility than the optical rail. be able to. As a result, by fitting the boss and the hole of the optical rail, the optical rail is positioned with high accuracy on the side plate of the scanner frame, and the relative position of the rail member with respect to the side plate of the scanner frame is set with high accuracy. can do.

According to the present invention, since the tip of the boss portion is formed in a tapered shape, when the boss portion of the scanner frame is fitted into the hole of the optical rail, the optical rail is fitted by the tapered portion. The workability of attaching the optical rail to the scanner frame can be improved.

According to the present invention, since the side plate of the scanner frame is provided with the holding portion for temporarily holding the optical rail at the time of mounting the optical rail, the workability of mounting the optical rail on the scanner frame is further improved. Can be improved.

Further, according to the present invention, since the holding portion is formed integrally with the scanner frame, it is possible to avoid an increase in the number of parts due to the provision of the holding portion.

[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 an overall perspective view of a scanner frame.

FIG. 4 is a sectional view of a front plate portion of the scanner frame.

FIG. 5 is an explanatory diagram showing a characteristic part of the present invention.

FIG. 6 is a view showing a fitted state of a boss portion and a circular hole portion.

FIG. 7 is a cross-sectional view showing another embodiment of mounting a rail member.

FIG. 8 is a cross-sectional view showing another embodiment of the shape of the rail member.

FIG. 9 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

8 scanner frames 81,82 front and rear side plates 8c Boss 8c 'conical peripheral surface 8d holding part 12, 13 First and second traveling frames 16 Rail member 16d circular hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masatoshi Uehara             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) 2H108 AA01 EA41                 5C072 AA01 BA04 BA13 DA02 DA04                       EA05 MA05 XA01

Claims (6)

[Claims] 1. An optical rail configured of a first steel plate for guiding a traveling operation of a traveling frame on which an optical system for reading a document is mounted, which has a ductility higher than that of the first steel plate. Two
In a positioning structure of an optical rail for positioning on a side plate of a scanner frame having a substantially rectangular parallelepiped shape formed by using the steel plate, a boss portion for positioning the optical rail relative to the scanner frame on the side plate of the scanner frame. The optical rail is formed with a hole corresponding to the boss, and the optical rail is positioned on the side plate of the scanner frame by fitting the boss and the hole. Rail positioning structure. 2. The optical rail positioning structure according to claim 1, wherein the tip of the boss portion is formed in a tapered shape. 3. The positioning of the optical rail according to claim 1, wherein the side plate of the scanner frame is provided with a holding portion for temporarily holding the optical rail near the side plate of the scanner frame. Construction. 4. The optical rail positioning structure according to claim 3, wherein the holding portion is formed integrally with the scanner frame. 5. The optical rail positioning structure according to claim 4, wherein the holding portion is formed by cutting and raising a part of a side plate of the scanner frame. 6. The optical rail positioning structure according to claim 1, wherein the first steel plate is a stainless steel plate and the second steel plate is a galvanized steel plate.