JPS6018682Y2 - Moving body drive mechanism - Google Patents

Description

[Detailed description of the invention] For example, in a copying machine that is capable of not only full-size copying but also reduction copying, when changing lenses to change the magnification, the present invention is designed to move the support that supports each lens to the fixed position. The present invention relates to a drive mechanism for a moving body to be moved.

Conventionally, as a drive mechanism for moving a moving body to a fixed position, both ends of a wire are directly fixed to the moving body, this wire is stretched between each pulley, and at least one is driven as a drive pulley. Moving a mobile object.

In this case, when starting the moving body, there are problems such as driving torque, but a considerable shock is transmitted to the moving body.

Moreover, even when the moving body is stopped, shocks occur in the moving body due to overrun, etc., which also causes noise.

This may cause problems in the mechanism for transmitting the driving force to the drive pulley, for example, the reduction gear from the motor or the like.

Therefore, in the past, a configuration has been adopted in which a clutch or the like is provided in the drive section to apply a delay to soften the shock at the time of starting and stopping.

Therefore, the mechanism becomes complicated and expensive.

Moreover, it is not suitable for miniaturization. In view of the above-mentioned drawbacks, the present invention provides a drive mechanism that alleviates the shock of a moving body by a simple means.

That is, in the present invention, when a wire to which a driving force from a driving source is transmitted as a driving mechanism is fixed to a moving body, the wire is fixed via an elastic body, particularly a coil spring.

In addition, when copying with different magnifications in a copying machine, the lens is replaced or moved to a fixed position, and by using the above-mentioned drive mechanism as the moving body at this time, the shock to the moving body can be alleviated. That has a big effect.

That is, if a shock is transmitted to the movable body when it starts or stops, the optical axis of the lens being held will shift, which will greatly disturb the copied image.

However, according to the present invention, in order to alleviate the shock, the movable body can be smoothly transported to a fixed position, and the optical axis of the lens does not shift, so that clear copies can always be made.

The drive mechanism of the present invention will be described in detail below with reference to the drawings.

The figure is a perspective view showing an embodiment of the drive mechanism of the present invention for a lens support in a copying machine.

In the figure, reference numeral 1 denotes a dark box that constitutes a part of the optical system of a copying machine, in which a reflection mirror fixed to one side 2 and an opposite side 3 is used to reflect the reflected light image from the document table on the negative side 2. A support member 6 holding an in-mirror lens 5 leading to the mirror lens 4 is movably provided.

In the lenses 5, 5-1 is, for example, an equal-magnification lens, and 5-2 is a reduction lens, and both are arranged horizontally on the support member 6.

Further, the lens 5-2 for reduction copying has the following functions depending on the reduction ratio:
The support member 6 is arranged so that the optical axis is inclined with respect to the optical axis of the lens 5-1.
is supported by

Both legs 7, 7 of the support member 6 are provided on a slide shaft 8, and a protrusion 9 at the center of the support member 6 is provided on a slide shaft 10.

That is, the support member 6 is provided movably along the slide shafts 8 and 10.

A fixing pin 11 is provided at the center of the lower part of the support member 6, and each end of the wire 12 for moving the support member 6 is connected to a coil spring 13.13.
It is fixed through.

In other words, as shown in the figure, the coil spring 13.13 is
It is fixed at a position symmetrical to the supporting material 6, and transmits the movement of the wire 12 to the supporting material 6.

The wire 12 is connected to a driving pulley 14 and a driven pulley 15.
, 16.

The driven boots IJ15 and 16 are rotatably attached to the side plates of the dark box 1.

The drive pulley 14 is fixed to a rotating shaft 18 of a motor 17 including a speed reduction mechanism.

Note that the drive pulley is stretched around the wire 12 by wrapping it around the wire 12 once in order to prevent the wire 12 from slipping.

On the other hand, on one side 3 of the dark box, if the equal-period lens 5-1 is positioned in the optical path as described above, a reflecting mirror 4 is fixed that reflects the light image directly toward the photosensitive drum surface. has been done.

A reducing reflecting mirror 19 rotatably held in the optical path between the reflecting mirror 4 and the photosensitive surface is provided in a dark box.

The reduction mirror 19 is fixed to a shaft 20 rotatably supported on each side plate of the dark box.

When the shaft 20 rotates, the reduction mirror 19 rises and is positioned facing the optical path.

That is, a wire 22, one end of which is fixed to a second driving pulley 21 integrally formed at the tip of the driving pulley 14 of the motor 17, is connected to the shaft 20 via each driven pulley 23, 24, 25 and a spring 26. It is attached to a lever 27 fixed to the end of the.

Therefore, when the motor 17 rotates, the wire 22 is wound around the pulley 21, causing the shaft 20 to rotate.

This causes the reflection mirror 19 to rise.

Note that a return spring 28 is attached to the lever 27.

In the structure described above, when making a copy at the same size, the equal-size lens 5-1 is located in the optical path as shown in the figure, and this lens converts the reflected light image from the original into the same-size copy. Aim at reflecting mirror 4.

On the other hand, when performing a reduced copy, a corresponding signal is applied to the motor 24.

This causes the drive pulley 14 to rotate counterclockwise, and the support member 6 to slide along the slide shafts 8 and 10.

Therefore, the reduction lens 5-2 is positioned in the optical path.

In conjunction with this, the wire 22 is wound around the pulley 21, so the shaft 20 is rotated, and the reduction mirror 19 is rotated.
gets up and faces the light path.

Here, the optical axis of the reduction lens 6-1 is inclined, and the reduction reflection mirror 19 is inclined in accordance with the inclination of the lens 5-2.

Here, when the support member 6 is moved along the slide shafts 8 and 10, the spring 13 is first pulled when the support member 6 is started, so the rotational force of the motor 17 acts as a delay effect. .

Thereafter, when the spring 13 (left side in the figure) is about to contract, the support body 6 is moved.

At this time, if the support body 6 tries to move suddenly, it will be pulled by the other spring 13 (on the right side in the figure), so the movement will be suppressed and shock etc. will be eliminated.

When the support body 6 moves, it is smoothly moved according to the rotational force of the motor 17.

Therefore, at the time of starting, the support body 6 has both springs 13
The shock of starting the engine is alleviated by this function, and vibrations are not transmitted to the lens.

Here, spring 13. ．． 13 is fixed to the support body 6, particularly in a symmetrical position, the above-mentioned effects become more pronounced.

Furthermore, when the support member 6 is stopped at a fixed position, if the rotation of the motor 17 is stopped, the support member 6 will overrun to some extent when moving from moving to stopping. The material 6 collided with the regulating part that defines the fixed position, causing vibrations, noise, etc.

However, according to the present invention, when stopped, the spring 13 acts as a brake, and the braking action acts on the movement of the support member 6, so that the support member 6 is quietly stopped at a fixed position.

As explained above, according to the drive mechanism of the moving object according to the present invention, shocks such as vibrations caused by collisions and noise generated when starting and stopping the moving object can be alleviated with a simple mechanism, and downsizing can be expected. .

Further, if the movable body is a lens support of a copying machine or the like, the shock applied to the lens can be alleviated, so that stable copying can always be performed without misalignment of the optical axis, etc.

[Brief explanation of drawings]

The figure is a perspective view showing an embodiment in which the movable body drive mechanism of the present invention is applied to a lens support of a copying machine. 5: Lens, 5-1: Equal trust lens, 5-2: Reduction lens, 6: Support material, 8.10 Nishlide shaft, 12: Wire, 13: Coil spring, 14: Drive pulley, 1
5, 16: Driven pulley, 17: Motor, 18: Rotating shaft.

Claims (1)

[Scope of utility model registration request] A drive mechanism that transports a movable body having both ends of a wire fixed to a specified position by driving the wire using a drive section, and has an elastic body such as a coil spring attached to each of both ends of the wire fixed to the movable body. A drive mechanism for a moving body, characterized in that one end of both elastic bodies is connected, and the other ends of both elastic bodies are directly fixed at a position symmetrical to the left and right sides of the moving body.