JPH06100775B2 - Wire drive optical system device - Google Patents

Description

The present invention relates to an optical system device mainly used in a copying machine and driven by a wire.

(B) Conventional Technology In this type of optical system device, a first optical system having a wire fixed end and a second optical system having a movable pulley are driven by wires stretched through the wire fixed end and the movable pulley, respectively. (See, for example, JP-A-58-95762).

(C) Problems to be Solved by the Invention In such an optical system device, the first and second optical systems are parallel to each other and are always held at a right angle to the moving direction, and a predetermined distance relationship is maintained. It is essential that the image be driven while being kept at a high temperature, so that the focus and magnification of the image can be well maintained, and an image without distortion can be obtained. Therefore, conventionally, the first
As for the positional relationship between the second optical system and the second optical system, a dedicated jig for assembly is used to position the optical system and the main body fixing portion when assembling the optical system device, and then the optical system and the wire are fixed. It is set by adjusting the position and tension of each wire.

Therefore, if the positional relationship of the optical system is misaligned due to shock during transportation of the optical system device after assembly or extension of the wire during use, readjustment work should be performed when the adjustment jig is not prepared. It wasn't easy and was very laborious.

The present invention has been made in consideration of such circumstances, and when the positional relationship does not shift due to shock or vibration during transportation, and when the positional relationship of the optical system needs to be readjusted after assembly. Provides a wire drive optical system device that can be easily adjusted in a short time.

(D) Means for Solving the Problems The present invention relates to a first moving frame having a wire fixed end and a first optical system, and a second moving frame having a movable pulley and a second optical system.
A wire drive optical system in which a movable frame is driven by wires stretched through respective wire fixed ends and a movable pulley, moves along a guide member, scans a document, and forms a document image on a light receiving portion. The apparatus includes a storage box that removably fits and accommodates the first moving frame and the second moving frame at a predetermined distance from each other, and a positioning member that positions the storage box at a predetermined position of the main body fixing portion. , The predetermined interval and the predetermined position are the first when the storage box is fitted and positioned in the first and second moving frames.
And a wire driving optical system device in which the focus of the second optical system is set so as to match the light receiving portion.

The storage box is manufactured mainly by integrally molding resin as a material.

(E) Action Since a jig for positioning each optical system, that is, a storage box is provided, when the position of each optical system is adjusted, the storage box is used as the first moving frame and the second moving frame. After fitting and fixing the storage box at a predetermined position of the main body fixing portion by the positioning member, the fixing position of the optical system and the wire and the wire tension are adjusted.

If the storage box is carried while the storage box is fitted in the first and second moving frames at the time of transportation, it is possible to prevent the positional relationship from being misaligned due to impact or vibration. When using, remove the storage box before use.

(C) Examples Hereinafter, the present invention will be described in detail based on Examples shown in the drawings. The present invention is not limited to this.

FIG. 1 is an explanatory view mainly showing the arrangement of optical systems of a copying machine equipped with a wire drive optical system device according to the present invention.
Is a manuscript, (2) is a glass plate on which the manuscript is placed, (3) is a first optical system including an exposure lamp (3a), a reflector (3b), and a mirror (3c), and (4) is a mirror (4a) Second consisting of (4b)
Optical system, (5) lens, (6) fixed mirror, (7)
Is a photosensitive drum, and (8) is a copier case.

In such a configuration, the document is exposed by the illumination light of the exposure lamp (3a), and the light is reflected by the mirrors (3c) (4a).
(4b), the imaging lens (5), the mirror (6), and the photoconductor are reached to form a document image. Then, the first optical system (3) and the second optical system (4) move in the direction of arrow (A) at a speed ratio of 2: 1 to expose and scan the entire document (1).

FIG. 2 is a perspective view mainly showing the drive device of the wire drive optical system device according to the present invention. (3A) shows the first moving frame provided with the first optical system, and (4A) shows the second optical system. The second moving frame provided, (9) and (9a) are wire fixed ends provided on both sides of the first moving frame, (10) and (10a) are movable pulleys provided on both sides of the second moving frame, and (11). ) (11a) is a drive pulley connected to a gear (11b) and a shaft (11c) and driven by a drive source (not shown), (12) (12a) and (13) (13).
a) is a fixed pulley, (14) (14a) is a wire, (15) (15
a) is a rail that slides the first and second moving frames (3A) and (4A) in the moving direction, and (16) and (16a) are wires (14) and (14a) fixed by pins (17) and (17a). A spring that gives a predetermined tension to the wire, (18) is an adjusting screw part that adjusts the tension of the wire (14) by fixing the screw side to the end of the wire (14) and the nut side to the body, and (19) is the wire (14a). Is a stopper that fixes the end of the to the main body.

FIG. 3 is an explanatory view showing a tensioned state of the wires (14) and (14a) of FIG. 2, and the tips of the wires (14) and (14a) are attached to the adjusting screw portion (18) and the stopper (19), respectively. Fixed and movable pulleys (10) (10a) and fixed pulleys (12) (1) at the winding parts (20) (20a) and (21) (21a)
2a) is wound by half a turn each, then the winding part (22)
In (22a), the first and second drive pulleys (11) and (11a)
It is wound by the length corresponding to the moving distance of the moving frame.
Further, in the winding parts (23) (23a) and (20) (20a), the fixed pulleys (13) (13a) and the movable pulley (1
After being wound around 0 (10a) by half a turn, the ends are locked by the springs (16) (16a). Then, the wire fixing ends (9) and (9a) are fixed at the fixing portions (24) and (24a), and the tension balance between the wires (14) and (14a) is adjusted by the adjusting screw portion (18).

FIG. 4 is an explanatory view of the essential parts of an embodiment of the present invention.
In Fig. (A), (25) is a storage box in which the first moving frame (3A) and the second moving frame (4A) are detachably fitted and stored in a state where they are separated from each other by a predetermined distance, (26). Is a positioning pin provided in the storage box, (27) is a pin hole provided in the main body fixing part, that is, the rails (15) and (15a) and fitted into the pin (26), and (29) is an upper part of the storage box (25). Is a cushioning material provided in the. The pin hole (27) installation position and the distance D between the first moving frame (3A) and the second moving frame (4A)
(See FIG. 4 (b)) shows the first and second moving frames (3A).
When the storage box (25) is fitted in (4A), the focus of the optical system is good and the original image with a predetermined magnification is formed on the photosensitive drum (7) (see FIG. 1). Is set.

Therefore, in assembling the optical system device shown in FIG.
First, as shown in FIG. 2, first and second moving frames (3A)
While mounting (4A) on the rails (15) (15a),
The storage box (25) is fitted into them, and the pin (26) is fitted into the pin hole (27). Next, while maintaining this state, as shown in FIGS. 2 and 3, the wires (14) (14a)
The wire fixed end (9) (9a) with the wire (14)
After fixing each to the (14a), the adjustment screw portion (18) is operated to adjust the tension balance of the wires (14) and (14a).

Further, the first and second moving frames are stored in the storage box (25) in advance when the optical system device is assembled, and the wires (14) and (14a) are attached to the wire fixed ends (9) and (9a) of the first moving frame. Fix the rails (15) (15
If it is mounted on a), not only the positioning of each moving frame is easy, but also the lengths of the wires (14, 14a) can be easily distributed, and the work of tensioning the wires is simplified.

In the optical system device assembled in this way, the first and second moving frames (3A) and (4A) are positioned in a predetermined positional relationship, so that there is no need to adjust the focus or magnification after assembly.

1st and 2nd moving frame (3A) by long time use
If the positional relationship of (4A) is incorrect, after positioning using the storage box (25) as in the case of the above-mentioned assembly, their positional relationship and the tension of the wires (14) (14a), etc. Should be corrected.

Further, at the time of transportation, as shown in FIG. 4 (b), the glass plate is inserted through the cushioning material (29) with the storage box (25) fitted to the first and second moving frames (3A) and (4A). If they are pressed and fixed by (2), they are firmly fixed and the positional relationship does not change due to shock or vibration during transportation.

(G) Effect of the Invention According to the present invention, the positioning of each moving optical system is performed by the storage box provided in the optical system device.
Not only is it easy to adjust focus and magnification during assembly,
The positional relationship caused by the elongation of the wire during use after assembly can be adjusted extremely easily.

Further, since it is possible to carry the optical system device in a state where the optical systems are fixed by the storage box, it is possible to prevent the positional relationship between the optical systems from being deviated due to shock or vibration during transportation.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the construction of a copying machine equipped with a wire drive optical system device according to the present invention, FIG. 2 is a perspective view showing a drive device of the wire drive optical system device according to the present invention, and FIG. Explanatory drawing showing the tensioning state of the wire in FIG. 2, FIG. 4 (a)
(B) is an explanatory view showing a configuration and an operation of a main part of an embodiment of the present invention. (3A) …… first moving frame, (4A) …… second moving frame, (25) …… storage box, (26) …… positioning pin, (27) …… pin hole.

Claims (3)

[Claims] 1. A first moving frame having a wire fixing end and having a first optical system, and a second moving frame having a movable pulley and having a second optical system.
A wire drive optical system in which a movable frame is driven by wires stretched through respective wire fixed ends and a movable pulley, moves along a guide member, scans a document, and forms a document image on a light receiving portion. The apparatus includes a storage box that removably fits and accommodates the first moving frame and the second moving frame at a predetermined distance from each other, and a positioning member that positions the storage box at a predetermined position of the main body fixing portion. , The predetermined interval and the predetermined position are the first when the storage box is fitted and positioned in the first and second moving frames.
And a wire drive optical system device in which the focus of the second optical system is set to be on the light receiving portion. 2. The wire drive optical device according to claim 1, wherein the storage box is a resin integrally molded product. 3. The wire drive optical system device according to claim 1, wherein the storage box is provided with a cushioning material on the outside.