JPS613559A - Picture information reader - Google Patents

Abstract

PURPOSE:To improve the accuracy of parallelism between a guide member and a side frame by fitting and supporting the guide member to the side frame via a support means. CONSTITUTION:When a cam 16 is turned while a bolt 19 is loosened slightly, the guide rod 5 is made movable relatively to a frame end face 10 of the side frame. Then in tightening the bolt 19 at a desired position, the rod 5 is fitted and fixed to the frame terminal face 10 while being adjusted. The position is adjusted to the frame end face 11 by a support meands 15 even at the other end of the rod 5 similarly as above. Since the guide rod 5 is fitted directly to the side frame 2 in such a way, the accuracy of parallelism to the side frame 2 is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image information reading device used in an image forming device such as a thermal transfer color copying machine.

[Technical background of the invention and its problems]

This type of image information reading device is equipped with an image reading section that can reciprocate within the main body of the device in order to read and scan a document placed on a document table, and the reading section is driven by a drive electric motor via a drive transmission member. In addition, the reading section is guided in the reciprocating direction by a guide member such as a guide rod.

In conventional devices of this type, the drive motor is located at the rear of the device body.
The guide member was attached and supported by the frenim, and the front end of the guide member was directly attached and fixed to the front frame of the main body. On the other hand, the document table was located on the top of the main body, with both sides placed above the side frames, and its position was determined in relation to the side frames.

Therefore, the parallel accuracy between the document surface on the document table and the reading unit that optically scans the edges is determined by the parallel accuracy between the guide member and the side frame. - There was a problem that greatly affected the accuracy of assembly with frames etc. If the parallelism accuracy is not sufficient, the image quality will be affected, which is particularly a problem when used in image forming apparatuses such as color copying machines.

In the past, there was also no mechanism for easily adjusting the position of the guide member relative to the frame of the main body, and the device depended on the accuracy of individual parts and assembly.

Furthermore, in the past, as mentioned above, the drive motor, guide members, etc. were individually attached and supported to the rear frame, front frame, etc., which caused troublesome assembly work.
Further, there are also problems such as the difficulty of mutually adjusting the individual parts after assembly.

[Object of the present invention]

The present invention has been made in view of the above problems,
The purpose is to provide an image information reading device that can achieve higher parallelism accuracy and is easy to assemble.

[Summary of the invention]

In order to achieve the above object, the present invention basically proposes a configuration in which the guide member is attached and supported to the side 7 frame via a support means.

With this configuration, the parallel accuracy between the guide/inner material and the side frame does not include any members such as the front frame in between, so it is not affected by the assembly accuracy, and high accuracy can be easily achieved. can.

Furthermore, in the present invention, various proposals have been made in connection with the above-mentioned basic configuration, as described in the following embodiments.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings. In FIG. 1, 1 is the main body of the device indicated by a chain line, 2 is a side frame provided on one side of the device, 3 is a drive motor arranged at the rear of the main body 1, 4 is an image reading section, and 5 is this reading section. The id rod guides the reciprocating movement along the front and back direction of the main body of 4.
Reference numeral 6 denotes a carrier slidably supported by the door 5 and provided in the reading unit 4; 2 a timing unit connected to the carrier 6 and transmitting the power of the electric motor 3 to the reading unit 4;
It's a belt. The guide rod 5 constitutes a guide member,
The belt 7 constitutes a drive transmission member together with the pulley 8 and the like that suspend the belt.

As shown in FIG. 2, the side frame 2 includes a frame main body part 9 that collapses in the front-back direction of the main body 10 and has a substantially U-shaped cross section. Frame end face 10 integrally attached at right angles to
．． Consists of 11. The aforementioned electric motor 3 is attached to the side frame 2.
this frame 2 through a block 12 at the rear end of the
installed on. The pulley 8 is mounted and supported on the inner surface of the side frame 2 by a mounting portion 13. The pulley on the motor 3 side is connected to the rotating shaft of the motor 30 and suspends the belt 7, but it is not visible in the drawing.

In FIG. 1, only the frame 2 on one side (right side) is shown, and the side frame on the other side is omitted.

A document table glass constituting the document table 14 is placed on these side frames.

On the other hand, the front end of the wide rod 5 is attached to and supported by a frame end face 10 of the side frame via a support means 15. The rear end portion of the rod 5 is also attached and supported to the end surface portion 11 of the 7-layer 4 by a support means 15 having a similar structure.

In this way, the drive motor 3, the drive transmission member 7°8, and the side rod 5 are all mounted and supported on the side frame, and when assembled, the drive motor 3, the drive transmission member 7°8, and the side rod 5 are mounted and supported on the device main body 1 as one unit.
It can be incorporated into.

The support means 15 has an adjustment mechanism comprised of an eccentric cam 16, as shown in FIGS. 3 and 4. The cam 16 is rotatably fitted into a circular fitting hole 11 formed in a frame end face 10 of the side frame, and an enlarged portion protruding outward from the end face 10 constitutes a rotation operation portion 16a, which allows rotation operation. It has a pair of diametrically opposed flat surfaces for easy handling.

A seat hole 18 is formed through the cam 16 and is centered at a position P eccentric by a distance e with respect to the rotation center Q.
The mounting bolt 19 is inserted here. The extending end of the bolt 19 is screwed into a screw hole 20 formed at the end of the guide port 5.

Therefore, if the cam 16 is rotated with the male seat 19 slightly loosened, the id rod 5 is rotated through the bolt 19.
is movable relative to the frame end surface portion 10 of the side frame within a maximum distance of . Then, by tightening the M seat 19 at a desired position, the rod 5 is attached and fixed to the frame end face 10 in an adjusted state.

The position of the other end of the rod 5 can also be adjusted with respect to the frame end face 11 by means of the support means 15 in the same manner as described above.

In the embodiment, the adjustment mechanism of the support means 15 was constructed with an eccentric cam, but a hole or a long hole is formed in the end face of the frame, and a mounting bolt can be inserted through the hole. - The position of the guide rod can be adjusted even with a simple structure that screws into the rod. However, the structure using the cam of the embodiment allows fine adjustment to be made accurately and easily by rotating the cam. This is a more desirable configuration.

Since the guide port and door 5 are directly attached to the side frame 2, it is easy to increase the parallelism accuracy with respect to the side frame 2, and by operating the adjustment mechanism in the support means, extremely high parallelism and row accuracy can be achieved. can be obtained. Therefore, the image reading section 4 guided by the guide rod 5 and the document table 1 placed on the side frame 2
It is possible to easily obtain high parallelism accuracy between 4 and 4.

To further explain the image reading unit 4 with reference to FIG. 5, 21 is a pair of left and right light sources υ such as fluorescent lamps, and 22 is a pair of these light sources 21.
A pair of fiber lenses arranged in an inverted V shape between them; 23 a cover having a slit opening 24 at the upper end and supporting the lens 22 on the lens block 25; 26 supporting the lens block 25; A photoelectric conversion section 27 is also placed on the carrier 6.

The light emitted from the light source 21 forms an image on the original 28 on the original platen 14, is reflected, passes through the fine lens 22, and is transmitted to the image sensor (color COD) of the photoelectric conversion unit 26.
) z y and is received here. That is, the image information on the original 28 is converted into an analog signal by the photoelectric converter 26, then converted into a digital signal by the A/D converter 27, and sent to the reading device via the flat cable 30 (FIG. 1). The data is sent to a recording device (not shown) connected to the .

The image sensors 29 are arranged alternately in parallel, for example, in a staggered manner, and output image information as color signals of green, yellow, and cyan light, for example.

To further explain the control circuit of the reading section shown in FIG. The analog signal taken out serially is amplified by an amplifier 32. The amplified signal is sent to this amplifier 32 and separated into green, yellow, and cyan signal pressures by an analog switch (5W) 34 that operates in response to pulses from a pulse oscillator 33, and the A/D converter 30
sent to. The conversion 11i'('U ψ)f is operated by a pulse from the pulse oscillator 33, converts the signal from the analog switch 34, and sends it to the pack memory 35.

This packer memory 35 stores the signal digitized by the converter 30 to the address indicated by the address counter 36. In this way, image sensor 2
The color data of the line read by 9 is converted into 1/2 and stored in the buffer memory 35 for each color.

Note that the reading section 4 is guided by a guide 5 on the one hand, and a kite rail 31 on the other hand as shown in FIG.
A roller 38 provided in the reading unit 4 rolls on this rail 32 as guided by the rail 32 .

As shown in the external perspective view of FIG. 7, this reading device is provided with a cover 39 that can be opened and closed on the top surface to cover the document table, and an operation section 40 is provided in the upper front of the main body 1 of the device. ing.

Furthermore, the present invention can also be applied to a slightly different sushi-like structure of the reading section, as shown in FIG. 8, for example.

That is, in the configuration of the reading section 4' shown in FIG. 8, the fiber lens 22' is placed horizontally within the lens block 25/, and the light irradiated onto the document surface from the light source 21' and reflected is transmitted through the slit opening 24'. It is passed through the lens 22/ through an optical system such as a mirror, and the photoelectric conversion section 2 at the bottom is
It is sent out to 6'.

Also in this configuration, the reading section 4' is guided and supported by the ID rod 5' via the carrier 6', and the reading section 4' is guided and supported by the ID rod 5' via the carrier 6'.
is supported by the side fist frame in the same manner as shown in FIGS. 1 and 2.

Although the explanation has been made above, it goes without saying that the present invention is not limited to these embodiments.

〔Effect of the invention〕

According to the present invention, the guide member that guides the reciprocating movement of the reading section is mounted and supported on the side frame by the support means, so the parallel accuracy between the two is determined by the accuracy of the parts, and the accuracy of assembly is Since it is unaffected, it is easy to obtain higher accuracy. Therefore, it is possible to maintain high parallelism accuracy between the document surface and the reading section, which has a great effect on improving image quality, and the present invention is particularly useful as a reading device for image forming apparatuses such as color copying machines. The effects it brings are extremely great, such as the fact that it can be applied to other devices.

[Brief explanation of drawings]

The drawings show an embodiment of the image information reading device of the present invention, and FIG. 1 is a perspective view showing the internal structure of the main body of the device, and FIG.
FIG. 3 is an enlarged sectional view taken along the line m--■ in FIG. 2, FIG. 4 is a top view of FIG. 3, and FIG. , FIG. 6 is a control circuit diagram of the reading section,
FIG. 7 is an external perspective view of the reading device, and FIG. 8 is a partially cutaway perspective view of a modified example of the reading device including a reading section with a different configuration. DESCRIPTION OF SYMBOLS 1... Apparatus main body, 2... Side frame, 3... Drive motor, 4... Image reading section, 5... Id rod, 15... Supporting means. Applicant's Representative Patent Attorney Takehiko Suzue Figure 3 Figure 5 Figure 6 Figure 7

Claims (6)

[Claims] (1) A device main body, a side frame provided on one side of the main body, an image reading section that can reciprocate to read and scan the original on the document table, and a drive motor that drives the reading section. , a drive transmission member between the electric motor and the reading section;
An image information reading device comprising: a guide member for guiding the reciprocating movement of the reading section, wherein the guide member is attached and supported to the side frame via a support means. (2) The guide member consists of a guide rod that extends in the direction of reciprocating movement of the reading section, and both ends of the rod are arranged on the side.
The image information reading device according to claim 1, wherein the image information reading device is mounted and supported on a frame via supporting means. (3) The image information reading device according to claim 1 or 2, wherein the support means includes an adjustment mechanism that allows adjustment of the relative position of the guide member with respect to the side frame. (4) The drive motor and the drive transmission member are also connected to the side
An image information reading device according to any one of claims 1 to 3, which is attached to a frame. (5) The image information reading device according to claim 4, wherein the drive transmission member comprises a pulley supported by a side frame and a timing belt suspended by the pulley. (6) The image information reading device according to claim 3, wherein the adjustment mechanism for the support means includes an eccentric cam.