JPS59155657A - Wire rope gearing - Google Patents

Abstract

PURPOSE:To make wire setting easily performable in a state of removing such parts that hinder the wire setting, by temporarily supporting a wire pulley required for a driving wire setting. CONSTITUTION:In time of wrapping a wire rope in proper tension, a driving pulley 14 is externally fitted in a temporary support shaft 20A before setting a motor 13, and when both holes 14A and 20C are adjusted right and a jig pin 22 is inserted into this congruous hole through, the driving pulley 14 can be unrotatably held. Under this condition, tension wrapping for the wire rope takes place and, after wire setting is over, a shaft 13A of the motor 13 is fitted in a hole of the driving pulley 14, locked by a worm screw 13c, and when the jig pin 22 is removed, the driving pulley 14 can be freely and rotatively driven by the driving motor 13.

Description

Detailed Description of the Invention Technical Field The present invention relates to (1) a wire rope drive device that drives a moving member by a wire rope moved by a drive pulley that is rotationally driven by a drive source, particularly an exposure optical system of an electrophotographic copying machine; The present invention relates to a wire rope drive device for driving a scanning member, etc.

A driving device for a scanning member of an exposure optical system of a conventional electrophotographic copying machine,
In drive devices that frequently drive movable members back and forth, such as drive devices for the carriage of a printer's print head, rotational drive by a drive source is preferred due to the small inertial mass and ease of machining and adjustment of the members. Wire rope drive devices are widely used in which a moving member is driven by a wire rope that is moved by a drive pulley.

However, in some cases, wire rope drive devices require only the tensioning of the drive wire to be extremely complicated, and it may be difficult or impossible to set the wire when the drive motor or moving member is connected to the pulley that winds the wire. do. Also, when replacing the drive motor or moving parts, 1. There was a problem in that when the pulleys connected to the cages were removed, the pulleys connected to the cages were removed from their predetermined positions, and the wire ropes that had been strung around were removed, requiring a great deal of effort and time to reset them.

Examples of such a wire rope drive device include a wire rope and a drive device for driving a scanner (scanning member) of an exposure optical system of an electrophotographic copying machine that is driven on both sides.

The first example is a representative example of the configuration of an exposure device using a moving slit exposure system that is widely adopted in electrophotographic copying machines.
As shown in the figure. The contact glass installed on the top of the copier
The original placed on the top f' is irradiated with a slit by the illumination unit 8, and the reflected light passes through the first mirror 2, the second mirror 3, the third mirror 4, the lens 6, and the fourth mirror 5, and then reaches the photoreceptor. An image is formed on the drum 7. The illumination unit 8 and the first mirror 2 are carried by the first scanner 9, and the second mirror 3 and the third mirror are carried by the first scanner 9.
The mirror 4 is supported by a second scanner lO, and the first scanner 9 moves at a speed of ■, and the second scanner lO moves in the same direction on the guide rod 11 in synchronization at a speed of V/2, and moves the photoreceptor drum at a speed of V/2. By rotating at the circumferential speed V, exposure scanning is performed while keeping the object side optical path length constant. Also, when changing the magnification, the second and third mirrors 3, 4 and the lens 6 are adjusted according to the magnification m.
For example, 3/, 4/, and 6 are respectively indicated by broken lines in the figure.
/, the first scanner 9 is moved at a speed of W, and the second scanner 10 is moved at a speed of V/2 m to perform scanning.

The scanning drive and variable magnification movement of the exposure scanning system described above are performed by a wire rope drive device shown in FIG. A drive motor 13 is used as a drive source for exposure scanning, and a variable magnification motor 1 is used to displace the lens and second scanner 10 for variable magnification.
6A is used, wire ropes 12A and 12B are used as drive transmission members.

For example, high speed copying of 50 A4 size copies per minute is possible, and the maximum copy size is 432 mm (A4 size).
Copying machines that can make wide-width copies (3 widths)
The exposure scanning system must be made as light as possible to drive the camera and the camera with low power. In order to compensate for the lack of strength of the scanner due to this weight reduction, a single drive system on both sides is adopted. In addition, in order to miniaturize the device, we also
The wire system is arranged so that the drive wire is the shortest. In other words, the optical path width between the first and second mirrors is wide, so the first
A wire system is arranged below the second mirrors 2 and 3. The other reason for the above-mentioned weight reduction and shortest wire length is to improve the image quality by increasing the natural frequency of the system (C).

The drive motor 13 and the variable magnification motor 16A are arranged outside the wire loose due to layout constraints, and the 1 drive pulley 14 and the mirror shift pulley 16 are fixed to the morph axis.

, the drive wires are 12B for the rear drive and i for the front 1 drive.
As shown in FIG. 5, two wires of 2A are used, and the ends of each wire 12A and 12B have a hole 14B with a caulked steel ball provided on both end faces of the drive pulley, as shown in FIG.
14c and is fixed. The front driving wire 12A connects to the rear driving boo IJ with the guide pulley 15A.
12B and 90 degrees to the guide pulley 15 facing forward
bending, then the second scanner drive movable pulley 18, mirror shift pulley 16, and guide pulley 15B.

After being wrapped around the tension pulley 17, guide pulley 15C1 and moving pulley 18, it is fixed to the first scanner 9.The n1 guide pulley 15rf bends 90°0.The guide pulley 15D joins the rear wire 12B and is fixed to the drive pulley. . The arrangement of the pulleys between the pulleys 15A and 15D of the rear wire 12B is similar to that of the pulley 15 of the front wire 12A described above.
The arrangement is the same as that between A' and 15 pieces.

The above-mentioned mirror shifter 6 displaces the second and third mirrors 3 and 4 fixed to the second scanner when changing the magnification by rotating the variable magnification motor 16A with the drive motor 13 stopped. It plays the role of changing the optical path length.

'Since the first scanner 9 is fixed to the wire ropes 12A and 12B, it moves at the same speed as the wire ropes,
The second scanner is connected to the moving pulley L8 and therefore moves at a speed of % of the wire rope.

As described above, in this wire rope drive device, only the wire tensioning is very complicated, so setting the wires during assembly is not only difficult and time-consuming, but also the motors 13, 16
Since A is placed outside the wire loop, the wire cannot be set with the motor attached. Also, the second
The axis of the dynamic pulley I8 that drives the scanner 10 is supported by the second scanner IO, so in order to set the wire in this state, the entire second scanner 11 and 11 must be installed, and the mirror If you remove the second scanner for replacement, the movable boolean IJ 18 will also come off, and the wire rope that has been set will come off. Placing the motor inside the wire loop saves space and also makes it easier to replace the motor.
I can't do it because there are some drawbacks. Furthermore, driving the drive motor and the drive pulley via gears or the like has the disadvantage that the number of drive transmission members increases, accuracy decreases, and cost increases.

Purpose: In view of the above-mentioned drawbacks of conventional wire rope drive devices, the present invention provides a method for easily setting a drive wire, and for positioning a pulley around which the wire is wound at a predetermined position even when replacing a drive motor or a moving member. It is an object of the present invention to provide a wire rope and a driving device that can be held at a constant angle, and that are free from inconvenience caused by wire multiplication and are free from the possibility of deterioration in accuracy or cost increase.

Structure The purpose of this is to temporarily hold a pulley connected to a member that becomes an obstacle to the tensioning of a wire rope or a member that may be removed for replacement etc. in a predetermined position without being connected to the member. This is achieved by providing a temporary holding means that allows the pulleys to be held in a state where they do not interfere with the operation of the pulleys when they are connected.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 3 shows a temporary holding device for the drive boob IJ 14 according to the present invention. A temporary support shaft bracket 20B is attached to the main machine frame 21 in parallel with the drive motor bracket 13B, and a drive boot IJ is attached to the bracket 20B.
"0" where the temporary support shaft 2OA that temporarily holds I4 is fixed.
．． A through hole into which the motor shaft 13A fits is provided on the motor side in the axial direction on the center line of the drive boot 4, and a hole into which the temporary support shaft fits loosely is provided on the temporary support shaft side. ing. In the range where the temporary support shaft fits loosely, there is one driving force in the direction perpendicular to the shaft.
Holes 14A and 20 pass through JI4 and temporary support shaft 2OA.
C is drilled 'i''15, and a jig pin 22 shown in broken lines in FIG. 3 can be inserted through both holes.

When tensioning the wire rope, before installing the motor 13, fit the drive boob IJ 14 onto the temporary support shaft 2OA,
1. Align the holes 14A and 20C and insert the jig pin 22. The drive boob IJ14 can be held unrotatably. In this state, the wire rope is stretched, and after completing the wire setting, the shaft 13A of the motor 13 is fitted into the hole of the drive boob IJ14, and fixed with the caterpillar screw 13c.
If the jig pin 22 is removed, the drive IJ 14 can be rotated freely by the drive motor 13. By using this drive pulley temporary support shaft 20, the drive pulley IJ 14 can be rotated freely by the drive motor 13.
can be easily replaced without having to remove the wires.

FIG. 4 is a diagram showing a temporary holding device for the driving rotary pulley 8 of the second scanner 10, and the movable pulley IJ 18 is attached to the bearing 18.
It is pivotally supported on the support shaft 18A via C. Support shaft 18
A is the screw I attached to the moving pulley mounting part 10A of the second scanner IQ.
It is removably fixed with OB. A temporary support member 23 is fixed to the machine frame adjacent to the outer peripheral surface of the support shaft 18A and perpendicular to the axis, and the support shaft 18A and the temporary support member 23 are completely passed through.
A square hole 18B is coaxial with the temporary support member.

23A, so that a jig pin 24 having a rectangular cross section shown by a broken line in FIG. 4 can be inserted through both holes.

Therefore, when setting the wire rope, without attaching the second scanner IO, by passing the jig pin 24 through the square hole 18B of the dynamic pulley support shaft 18A and the square hole 23A of the temporary support member 23, the dynamic pulley I8 can be moved around its axis. Since the wire can be held in a fixed position without rotating around the square hole or around the axis of the square hole, the wire can be easily set. After completing the wire setting, fix the moving pulley 18 to the moving pulley attachment part 10A of the second scanner 10 with a screw 1.0B, and remove the jig pin 24, and the moving pulley 8 will rotate freely by the wire. In addition, it is possible to carry out scanning movement accompanied by the second scanner lO.

Furthermore, since the shaft of the front and rear shift gear 16 is supported by the machine frame, the shaft will not be damaged even if the variable power motor 16A is removed.

FIG. 6 shows another embodiment of the temporary holding device for the drive pulley 14, in which the support shaft 2OA is provided with an enlarged head 20D, and the loose fitting hole provided at the center of the drive pulley 14 also corresponds to this. By providing a necessary clearance between the stepped portions and the corresponding surfaces, falling off is prevented without using jig pins, and the drive boob IJ14 is always freely rotatable.

FIG. 7 shows yet another embodiment of the temporary holding device for the drive boob IJ14, in which a tilter is attached to the outer periphery of the temporary support shaft 2OA so that the diameter becomes smaller toward the end on the side of the bracket 20B. In addition, from the side on which the drive pulley 14 is externally fitted, a sling 20E is provided on the shaft, forming a bifurcated shape. A ring part having an inner diameter equal to the outer diameter of the thin part of the tapered outer surface is fitted into the temporary support shaft 20AK, and by moving this ring from the position 25A to the position 25B in the figure, the support shaft 2OA is fixed. Slit 20F
The two prongs on both sides of the drive pulley 14 approach each other, and the outer diameter becomes smaller as shown by broken lines in the figure, creating a gap with the center hole of the drive pulley 14. Therefore, ring 5 is 2
At position 5A, the drive pulley is fixed, so the drive motor can be removed, and after wiring is completed,
The drive motor is coupled to the drive pulley 14, and the ring 25 is connected to the drive pulley 14.
When moved to the position 5E, the drive pulley 14 can be rotated freely by the drive motor.

FIG. 8 shows another embodiment of the temporary support device for the second scanner movable IJ18. In fact, in the FfA example, the support shaft 18A of the second scanner movable boot IJ 18 is
A groove 18B is provided on the outer periphery of the temporary support member 26.
(b) As shown in the figure, it is formed as an L-shaped member that rotates around a pin/26B provided on the machine frame, and its free end is fitted with a shaft in the groove 18B on the outer periphery of the support shaft. A clamp 26A made of a plate spring that can elastically clamp the support shaft 18'A is attached, and a temporary support member is installed between the position where the clamp 26A holds the support shaft 18'A and the state where the support shaft 18A is detached. An arcuate slit 26C is provided in which a guide pin for guiding and fixing 2G is engaged.

Therefore, when setting the wire, the temporary support member 26
Hold the working pulley shaft 18A with the clamp 26A, and tighten and fix the guide pin that engages with the sulin h 26C at a predetermined position. After wire setting is completed, the second scanner 10 is installed, and then the temporary Clamp 26 of support member 26
It is sufficient to remove it from the A i-axis 18A, rotate it around the fulcrum 26B to a position that does not interfere with the operation of the pulley 18, and fix it.

Effects As described above, according to the present invention, by temporarily supporting the wire pulley required for drive wire setting, wire setting can be easily performed with parts that obstruct wire setting removed. Also, parts can be removed during service without wires coming off.

Although a wire rope drive device for an exposure scanning system of an electrophotographic copying machine has been described as an example, the present invention can also be applied to a wire rope drive device for a print head carriage of a printer, etc. A similar effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a typical configuration of an exposure optical system of a copying machine, and FIG. 2 is a perspective view showing its scanning magnification, and the arrangement of wires, pulleys, etc. of a driving wire rope drive device. Third
The figure is a cross-sectional view showing an embodiment of the temporary support device according to the present invention for the drive pulley, FIG. 4 is a cross-sectional view showing an example of the temporary support device according to the present invention for the second scanner pulley, and FIG. A perspective view showing a method of fixing the 1st drive wire rope to the 1st drive pulley, FIGS. 6 and 7 are sectional views showing other embodiments of the drive pulley temporary support device, and FIG. 8 is a perspective view of the second scanner dynamic pulley. Figures illustrating another embodiment of the temporary support device for the present invention, in which (a) is a side view of the movable pulley, and (b) is a front view of the temporary support member. 10... Second scanner (moving member) 12A, 12B... Wire rope 13... Drive motor (1 drive source) 14... Drive pulley 18... Moving pulleys 20, 23, 26... Wire boot temporary holding means□−) Agent Patent attorney Takehisa Ito 2−□□−−−
Figure 1 Figure 2 Figure 3 Figure 4. Flash

Claims (1)

[Scope of Claims] (4) A wire rope 7 that is stretched around a plurality of pulleys and is moved by a drive pulley that is rotationally driven by a drive source to drive a movable member.
In the drive device, when the pulley is connected to the wire rope without connecting any of the members connected to each of the pulleys mentioned above that may obstruct the tensioning of the wire rope or which may be removed from the pulley for replacement, etc. , holding the drive device in the predetermined position it should occupy in the assembled state;
1. A wire rope 1 drive device, characterized in that a wire pulley temporary holding means is provided, which allows the pulleys to operate without interfering with the operation of the pulleys when the member is connected to the pulleys. (2) The above-mentioned wire rope drive device is a scanning member and drive device of an exposure system of an electrophotographic apparatus, and includes a drive pulley connected to one drive source and a moving pulley attached to one part of the scanning member. The wire rope drive device according to claim 1, wherein the wire rope drive device is capable of being held by the temporary holding means.