JPS6278541A - Optical section supporting device - Google Patents

Abstract

PURPOSE:To improve the quality of a picture image by connecting an end member to which a sliding member is attached rotatably to the body of a supporting frame in a plane including a slide that supports the sliding member. CONSTITUTION:A rotation energizing member that energizes and turns an end member 42 so as to bring the home position side into pressure-contacted with a slider is provided, and a driving wire 66 for transmitting driving force to the body of supporting frame 51 is attached, and a pair of sliding members 53 are supported by corresponding sliders 63. The degree of parallelism of the supporting frame can be adjusted by adjusting the state of fitting of the two driving wires 66, and relative positional relation of the pair of sliding members can be adjusted by rotation of the end member 52 against the body of the supporting frame. Further, rising up of one sliding member from the slider when driving force is applied by driving wires can be checked by a rotation energizing member, and all sliding members can be brought into contact with the upper face of the slider. Thus, the quality of a picture image obtained can be heightened.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides an optical part support device that stably supports, on a slider, an optical part that moves back and forth in order to scan and expose an original that has been printed on a contact glass. Regarding.

<Prior Art> Conventionally, in order to reduce the overall size and speed up the copying process, originals are set on the contact glass by reciprocating the optical part under the fixed contact glass. Many devices are available that perform scanning exposure.

In order to move the optical part back and forth in this way, there are the following: (1) A slide shaft is inserted into one end of the support frame to which the optical part is attached, and a slide member attached to the other end is supported on the slider; A drive wire A7 is attached to a boom attached to one end of the support frame, and the drive force is transmitted only to one side of the support frame, and A slide member is attached to the top, and a boob is attached to both ends.
The slide member at each end is supported by the slider, and the driving wire V is wound around each boob,
Some devices are configured to transmit driving force to both sides of the support frame.

<Problems to be Solved by the Invention> With the structure described in (■) above, the attachment of the support frame can be improved by increasing the quality of the part through which the slide shaft is inserted. There is a problem that the support frame becomes larger, and if the length of the insertion part is shortened,
There is a problem in that sufficient parallelism cannot be achieved, and the vibration of the support frame continues for a long time at the beginning of movement for image formation, resulting in noticeable image distortion at the leading edge of the obtained image. .

In addition, as for the structure of the above (■), there are 3
by attaching four slide members to ensure that all the slide members are in contact with the slider, and four slide members are attached to the end of the support frame,
In addition, by imparting flexibility to the support frame itself, all slide members come into contact with the slider (
(See Japanese Patent Application Laid-open No. 754434/1983).

In any of the above configurations, since the parallelism of the support frame can be adjusted by winding both drive wires, it has the advantage that there is no need to increase the accuracy of the support frame itself. Small size and weight reduction can be easily achieved.

However, in the former configuration, one end to which the driving force is transmitted by the driving wire is in contact with and supported on the slider by two sliding members,
Since the other end is in contact with and supported on the slider by only one slide member, when the driving force is transmitted by the drive wire, the other end is in contact with and supported by only one slide member. There is a problem that wear increases on the supported side, blurring occurs, and the quality of the obtained image deteriorates.

In addition, in the latter configuration, both ends of the support frame are securely abutted and supported on the slider by two slide members, thereby reliably preventing the occurrence of shaking as in the former configuration. However, since the support frame itself is flexible, if the mold balance of the support frame itself with the optical part attached is out of order, the inertia force during movement may be affected. etc. will be different, and the support frame itself will be distorted due to the above-mentioned imbalance of weight, etc., causing a shift of the optical axis, resulting in a problem that the quality of the obtained image will deteriorate.

Furthermore, when the forward movement for exposure is performed after the backward movement from the exposure end position to the home position, at the exposure start position close to the home position,
There is a problem in that a force acts in a direction that causes the slide member to lift up from the slider, causing deterioration in image quality such as tip wobbling. In particular, the above-mentioned problem becomes noticeable in the case where the return movement speed from the exposure end position to the home position is increased in order to satisfy the demand for higher speed.

This invention was made in view of the above problems,
To provide an optical part support device that can surely bring four slide members attached to a support frame into contact with the upper surfaces of a pair of sliders, regardless of the accuracy of the support frame itself, and can improve the quality of images obtained. It is intended to.

Means for Solving the Problems> In order to achieve the above object, an optical part support device of the present invention provides a support frame that supports both ends of a support frame to which an optical part that moves back and forth in order to expose an original on a contact glass is mounted. Each pair of slide members is attached to the lower surface, and the end member to which one pair of slide members is attached is connected to the main body of the support frame so as to be rotatable within a plane including the slide that supports the slide members. Attach a rotational biasing member to rotate and bias the end member so that the home position side is pressed against the slider, and also set a drive wire to transmit the driving force to the support frame main body, and connect each pair of the above. The slide members are supported by respective sliders.

<Function> With the above configuration, the parallelism of the support frame can be adjusted by adjusting the mounting condition of both drive wires.
Moreover, by rotating the end member relative to the support frame body, the relative positional relationship between each pair of slide members can be adjusted,
Moreover, the rotation urging member prevents one slide member on one side from lifting off the slider when a driving force is applied by the drive wire, and all the slide members can be brought into contact with the upper surface of the slider. The quality of the image obtained can be improved.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 4 is a schematic diagram showing the internal structure of a copying machine to which the present invention is applied.

(1) is a copy-like main body, the interior of which is divided into an upper chamber (12) and a lower chamber (13) by a partition plate (11), and an optical system for scanning and exposing the original (D) in the upper chamber (12). In the lower chamber (13), there is a copy processing unit (4) that forms a copy image on copy paper (P), and a copy paper transport unit (
8) is provided.

Here, the optical system (2) includes a light source (21) composed of a light emitter (31), a main reflector (32), and a sub-reflector (33), and a plane reflector (221 (23) (24). ), a lens (25), J'3 and a plane reflecting mirror (26),
The light source (21) and 1 are connected to the surface reflector (22N23) (24
) in the direction shown by arrow A, the document (D) on the contact glass (14) can be scanned and exposed (see also FIG. 3). Then, the light source (2
1), and the plane reflecting mirror (22) move together, and the plane reflecting mirrors (23) and (24) also move together, and the moving speed of the former is set to be twice that of the latter. In the following description, the light source (21) and the plane reflecting mirrors (22, 23, and 24) are collectively referred to as the optical section (2').

In addition, the copy paper conveyance section (8) includes a paper feed roller (81
), a paper feed path (83), a transport roller (85), a registration roller (86), a heat fixing roller (88), and an ejection roller (89), and by driving the paper feed roller, the paper feed cassette Take out a single sheet of copy paper (P) from (16), guide it to the copy processing section (4), transfer the toner image,
Although the configuration is such that the toner image is heated by the heat fixing roller (88), the fixed toner image is discharged onto the pedestal (18), but the configuration is not limited to this, and for example, It is also possible to use a copy paper conveyance section having other conventionally known configurations, such as a configuration in which the ejection sides are on the same side. The copy processing section (4) includes a photosensitive drum (41) that rotates in the direction shown by C in the figure, a charger (42), a blank lamp (B), a developing device (43), and a transfer charger (44). ), separation member (45), and cleaner (46)
are arranged in this order, and an electrostatic latent image is formed by forming an original image on the outer surface of the photoreceptor drum (41), which is uniformly charged by a charging charger (42). After removing the static charge on the peripheral edge that has not been printed using the blank lamp (B), the developing device (43) develops the toner image into a 1-toner image, and the transfer charge +7 (44) transfers the toner image onto copy paper (P). Transfer the toner to the cleaner (
46), but the configuration is not limited to this configuration; for example, it is also possible to use a copying processing unit with other conventionally known configurations, such as b using a belt-shaped photoreceptor. can.

FIG. 1 is an exploded perspective view of the main parts of the support frame (5) to which the light source (21) and the reflector (22) are attached, and FIG. 2 is a partially cutaway side view of the main parts, including the main body of the support frame. A light source (21) and a reflector 83F (22) are attached to a predetermined position of the part (51), and a predetermined position of an end member (52) rotatably connected to the support frame main body part (51). a pair of slide members (53), and a drive wire A7 connecting portion (5
4) is installed.

To explain in more detail, the support frame main body (51) has a reflector mounting part (55) which is formed by bending both ends of one flat plate at right angles, and a lower end of the one flat plate. The end member attachment section (56) is formed by bending upward at a right angle. Further, the end member (52) has a portion (56) where the end member is attached.
) into which the shaft (57) is loosely inserted.
), and poles 1 to (60) that prevent the bearings (5) from falling out are attached to the shaft (57). Further, the end member (52) and the end member mounting portion (57) are connected to each other.
) The above-mentioned shaft (
57) is formed into a hole (62) into which the end member (57) is loosely inserted, and a spring member (63) for pressing the end member (52) downward is formed at the end on the home position side. An engaging member (6
4). That is, the entire plate material (61) on which the spring member (63) and the engagement member (64) are formed constitutes a rotation biasing member. Therefore, the slide member (5
3) is the slider (6) attached to the copying machine body (1).
5) will come into contact with the top surface. Further, the drive wire connecting portion (54) is immovably connected to a predetermined position of the drive wire (66) by being compressed with a screw. Further, the pair of slide members (67) used are at the same height as the slide member (53), and the multiple pairs of slide members (53) (67) are in a relative relationship perpendicular to the exposure direction. installed on.

The optical part support device having the above configuration includes a support frame main body (51)
Since the end member (52) is rotatably attached to the slider (52), it is possible to ensure that the slide member (53) is in reliable contact with the upper surface of the slider (65).

Therefore, when the exposure operation is performed immediately after returning to the home position, blurring of the tip can be reliably prevented and a high quality copy image can be obtained.

To explain in more detail, when the force from the drive wire (66) is applied, a force is applied in the direction of rotating the support frame main body (51) around the center of gravity. Since a rotation biasing force is applied to the member (52) by the spring member (63), the slide member (53) can be reliably held in a state in which it is in contact with the upper surface of the slider (65).

Therefore, even when the optical section (2') is moved forward to form a copy image, blurring can be reliably prevented and a high quality copy image can be obtained.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the spring member may be attached in a shape different from that of the above-mentioned embodiments, or the end member (52) may be attached at a different position. etc., and it is also possible to make various other design changes without changing the gist of the invention.

<Effects> As described above, the present invention allows all the pairs of slide members attached to both ends of the support frame to which the optical section is attached to come into contact with the upper surface of the slider, so that no blurring occurs in the optical section. The unique effect is that a high-quality copy image can be obtained by exposing a document to light in the absence of U.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of the main parts of the support frame. Figure 2 is a partially cutaway side view of the main part. Figure 3 is an enlarged perspective view of the optical section. FIG. 4 is a schematic diagram showing the internal mechanism of the copying machine.

Claims (1)

[Claims] 1. Expose the original on the contact glass A support with an optical part that moves back and forth for A pair of slide parts on the bottom surface of both ends of the holding frame. Attach the slide members and remove one pair of slide members. The attached end member supports the slide member. Rotatable in the plane containing the slider It is said that it is connected to the main body of the support frame. , place this end member on the home position side. is rotated so that it is pressed against the slider. Attach the rotation biasing member, and then attach the support frame. The drive wire transmits the drive force to the main body. and each pair of slide members above. are supported by their respective sliders. An optical part support device characterized by the fact that Place.