JPS6278542A - Optical section supporting device - Google Patents

Abstract

PURPOSE:To improve the quality of a picture image by fitting a pair of sliding members to the lower faces of both ends of a supporting frame to which an optical section that moves back and forth to expose an original is attached. CONSTITUTION:A rotation energizing member that turns and energizes an end member 52 in the direction suppressing rotation caused by restoring force of a feeder line that applies voltage to a light source is provided, and driving wires 66 are provided to transmit driving force to the body of a supporting frame 51, a pair of sliding members are supported by corresponding sliders. The degree of parallelism of a supporting frame 5 can be adjusted by adjusting the state of fitting of the two driving wires 66, and relative positional relation of each pair of sliding members is adjusted by rotation of the end member 52 against the body of the supporting frame. Further, rising up of one sliding member of one side when restoring force of the feeder line acted can be checked by the 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 a method for stably moving an optical section consisting of a light source, a reflecting mirror, etc., which moves back and forth in order to scan and expose an original set on a contact glass. The present invention relates to an optical part support device.

<Prior Art> Conventionally, in order to reduce the size and increase the speed of the entire copying machine, contact glass has been developed by reciprocating an optical section consisting of a light source, a reflector, etc. below a fixed contact glass. 1- Many devices are available that scan and expose an original set on glass.

To move the optical part back and forth in this way, there are two methods: ■ A slide shaft is inserted through 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 is attached to a boob attached to one end of the W +1), and the drive force is transmitted only to one side of the support frame, and At the same time, pulleys are installed on both ends,
The slide member at each end is supported by the slider, and the drive wire is wound around each pulley,
Some devices are configured to transmit driving force to both sides of the support frame.

<Problems to be Solved by the Invention> If the configuration described in (■) above is used, the accuracy of mounting the support frame can be increased by increasing the length of the part through which the slide shaft is inserted. There is a problem that the 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, in the above configuration (■), there are 3
A device that ensures that all the slide members come into contact with the slider by installing several slide members,
By attaching four slide members to the ends of the support frame and imparting flexibility to the support frame itself, all the slide members abut on the slider. (See Publication No.).

In any of the above configurations, since the parallelism of the support frame can be adjusted by winding both drive wires, there is no need to increase the accuracy of the support frame itself. , smaller size, and lighter opening can be easily achieved.

However, in the above-mentioned curved structure, 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 weight balance of the support frame itself with the optical part attached is out of order, the inertia force etc. during movement may be affected. As a result, the support frame itself becomes distorted due to the imbalance of the above-mentioned gravity omega balance, etc., causing a shift in the optical axis, resulting in a problem that the quality of the obtained image deteriorates.

Furthermore, the radius of curvature of the feeder wire for supplying power to the light source becomes smaller in a predetermined range on the terminal end side in the starting direction, which is determined depending on the state of the feeder wire installation. There is a problem in that a force is applied in a direction that causes one of the slide members to lift up from the slider.

If the above-mentioned condition occurs, the quality of the obtained image will deteriorate due to blurring and the like.

This invention was made in view of the above problems,
To improve the quality of images obtained by ensuring that a 41I211 slide member attached to a support frame comes into contact with the upper surfaces of a pair of sliders, regardless of the precision of the support frame itself and the size of the radius of curvature of the feeder line. The purpose of the present invention is to provide an optical part support device that enables the following.

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 rotatably connected to the support frame main body within a plane including the slide that supports the slide members, A rotational biasing member () is attached to this end member to rotate and bias the end member in a direction that suppresses and controls rotation caused by the restoring force of the feeder wire that applies voltage to the light source, and a driving force is further applied to the main body of the support frame. A drive wire is attached to transmit the information, and each pair of slide members is supported by a corresponding slider.

<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, when the restoring force of the feeder line is applied, one slide member on one side can be prevented from floating up from the slider, 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) consisting of a light emitter (31), a main reflector (32), and a sub-reflector (33), a plane reflector (22N23) (24), and a lens. (25), and a plane reflecting mirror (26), and the light 1 (2
1) and the flat surface DI I (22N23N24) can be scanned and exposed by moving the original (D) on the contact glass (14) in the direction shown by arrow A (see also FIG. 3). and the light source (21),
The flat reflecting mirror (22) and the flat reflecting mirror (22) move into the unit, and the plane reflecting mirrors (23) and (24) also move into the unit, 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 anti-plane (
g) The mirrors (22) (23H24) are collectively referred to as the optical section (2').

In Fig. 3, (27) is a feeder line for supplying power to the light source (21), and in order to correspond to the reciprocating movement of the optical part (2'), it is connected at a predetermined position according to the movement state. It is designed to be curved in a folded shape.

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 transport/heat fixing roller (88), and an ejection roller (89). Single sheet copy paper (P) from paper cassette (16)
The toner image is taken out, guided to the copying processing section (4), where the toner image is transferred, the toner image is heated and fixed by the heat fixing roller (88), and then discharged onto the pedestal (18). However, it is not limited to this configuration,
It is also possible to use a copy paper conveyance section having another conventionally known configuration, such as a configuration in which the paper feed side and the discharge side are on the same side, for example. The copy processing section (4) includes a charger (42) installed around the photosensitive drum (41) rotating in the receiving direction at C in the figure.
), a blank lamp (B), a developing device (43), a transfer charger (44), a separating section U (45), and a cleaner (46) are arranged in this order.
2), the original image is formed on the outer surface of the photoreceptor drum (41) that has been uniformly charged to form an electrostatic latent image, and the static charge on the peripheral edge where the electrostatic latent image is not formed is removed by a blank lamp After being removed by step B), the toner m is developed into a toner image by a developing device (43), transferred onto copy paper (P) by a transfer charger (44), and the remaining toner is collected by a cleaner (46). However, the present invention is not limited to this configuration, and it is possible to use a copying processing section having another conventionally known configuration, such as one using a belt-shaped photoreceptor, for example.

Figure 1 shows the light source (21) and the reflecting mirror (22) (i).
FIG. 2 is an exploded perspective view of the main part showing the main part of the support frame (5).
1), a light source (21) and an anti-OA mirror (22
), and a pair of slide members (53) and a drive wire connection part (54) are attached to predetermined positions of the end member (52) rotatably connected to the support frame main body (51). It is installed.

To explain in more detail, the support frame main body (51) has a reflector mounting t which is made by bending both ends of a single flat plate at right angles.
The end member attachment portion (56) is formed by bending the lower end portion of the one flat plate member upward at a right angle.

Further, the end member (52) is attached to the end member mounting portion (52).
The hole (5) into which the shaft (57) attached to the predetermined position of (5) is loosely inserted
8), and the bearing (59) is handled by attaching a bolt (60) to the shaft (57) to close the drop. Further, the end member (52) and the end member mounting portion (57) are connected to each other.
) The above-mentioned shaft (
A hole (62) is formed into which the end member (57) is loosely inserted, and a spring member (63) is formed at the end on the home position side to press the end member (52) downward. ) is in contact with the lower surface of the engaging member (
64). That is, the rotation biasing member is constituted by the spring portion 0 (63) and the plate material (61) on which the engaging member (64) is formed.

Therefore, the slide member (53)
) will come into contact with the upper surface of the slider (65) attached to the slider (65). 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.

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, it is possible to suppress the deterioration of the quality of the copied image due to the blurring of the leading edge and the like.

To explain in more detail, the support frame main body (51) moves to a position close to the terminal end in the exposure direction and the feeder line (2
7) becomes smaller and a force due to the restoring force of the feeder line (27) is applied, the support frame main body (51)
A force is applied to the end member (52) in the direction of rotating it about the center of gravity, but the spring member (6)
3), the rotation biasing force acts on the slide member (5).
3) can be reliably held 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.

The above description has been about the case where the radius of curvature of the feeder line (27) becomes small near the exposure end position and a large restoring force acts. ), and curved to lead to the power feeding section, the restoring force of the feeder wire (27) acts in the opposite direction, so the end of the spring member (63) is separated from the home position. By forming it in the same manner as in the above embodiment, it is possible to reliably prevent the occurrence of blurring and obtain a high quality copy image.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, it is possible to attach a spring member having a shape different from that of the above-mentioned embodiments, or to attach the spring member at a position different from the attachment position G of the end member (52). Kototo (TJ Noh, that immortal,
Various design changes can be made without departing from the gist of the invention.

Effects> As described above, the present invention allows all 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 top surface of the slider, so that no wobbling occurs in the optical section. It has the unique effect of being able to obtain high-quality copied images by exposing the original to light.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main part of the support frame, FIG. 2 is a partially cutaway side view of the main part, FIG. 3 is an enlarged perspective view of the optical section, and FIG. 4 is a schematic diagram showing the internal mechanism of the copying machine. (5)...Support frame, (14)--Contact glass, (21)...Light source forming part of the optical section, (2
2) (23H24)...Reflector forming part of the optical section.

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. Then, apply a voltage to the light source using this end member. rotation caused by the restoring force of the feeder line. Rotation biasing part that biases rotation in the direction of suppression Attach the material and drive it to the main body of the support frame. Attach the drive wire to transmit the force, Each pair of slide members above Must be supported by the corresponding slider An optical part support device characterized by: