JPS6032861B2 - Copy number control device for copying machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine, and more particularly to a small copying machine in which a document table moves back and forth to control the number of copies.

In a type 4 copying machine in which the slave and document table move back and forth,
Since the circumferential length of the photoreceptor is small relative to the length of the paper used, it is necessary to rotate the photoreceptor multiple times for one copying process.

For this reason, if the signal for controlling the number of copies is taken from the rotation of the photoreceptor, the signal is issued multiple times for one copying process, making the control cumbersome and causing the activation of the signal generating means, such as the cam and mitt switch. Since the number of copies is increased and there are problems such as poor durability, the signal for the number of copies is taken from the movement of the document table.

However, when a signal is obtained from the movement of the document table, noise and vibration are generated when the signal generating means, for example, the docking mitt switch is activated, resulting in various defects in copy quality.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a copy number control device for a copying machine that can take out a copy number control signal from a photoreceptor once every multiple rotations of the photoreceptor. It is to be.

Embodiments of the present invention will be described below with reference to the drawings.

A shaft 2 is rotatably supported horizontally between the frames 1 and 1', and a first lever 3 is mounted on one end of the shaft 2, and a second lever 4 is mounted on the other end. 1 lever 3 is spring 9
It is biased to swing clockwise.

Reference numeral 5 denotes a swinging pestle provided on the frame 1' so as to be able to swing up and down with a spindle 6, one end 5a of which is attached to a pin 7 protruding from the first lever 3.
A cam follower 8 is provided at the other end 5b, which is in contact with the lower part of the cam follower 8.

A cam 10 is rotatably supported on a main shaft 11 which is rotatably supported between frames 1' and 1', and one portion of the cam is in contact with the cam follower 8.

On the main shaft 11, a drum gear 30 for driving the photoreceptor, a pulley 31 transmitted to a power source, and a continental drive gear 32 are fixed at intervals in the axial direction, and a large diameter drive gear 32
A small-diameter drive gear 34 is engaged with the intermediate shaft 33 which is rotatably supported structurally between the frames 1' and 1' and which is fixedly circumscribed.

A large-diameter driven gear 35 is fixed to the intermediate shaft 33 by outer iron, and the large-diameter driven gear 35 is rotatably mounted on the main shaft 11 and meshes with a small-diameter driven gear 36 fixed to the cam 10'. Here, the gear ratio of each gear 32, 34, 35, 36 is the main shaft 1
It is set so that when cam 1 rotates twice, cam 10 rotates once.

Further, one end of a link arm 13 is pivotally connected to the second lever 4, and the other end of the link arm 13 is pivotally connected to one end of an arm 15 rotatably supported on a base plate 19 via a shaft 14.

Reference numeral 16 denotes a ratchet provided on the base plate 19. A pawl 17 that engages with the ratchet teeth 16a is swingably attached to the arm 15, and the pawl 17 is attached to the ratchet teeth 16 by a spring 18.
It is biased to swing in the direction of meshing with a.

20 is a spring for preventing reverse rotation of the ratchet 16, 21 is a micro switch, and 22 is a dial, which is the ratchet 1.
The structure is such that when 6 rotates by one tooth, the scale increases by one.

23 is a pin that restricts the swinging of the arm 15.

Next, the operation will be explained.

When the copying process begins, the main shaft 11 rotates and rotates a photoreceptor (not shown) via the drum gear 30.

At the same time, the large-diameter drive gear 32 is rotated, and the cam 10 is rotated via the small-diameter drive gear 34, the middle borrowed shaft 33, the large-diameter driven gear 35, and the small-diameter driven gear 36, but the cam 10 is decelerated by each gear. , the main shaft 11 is rotated at a rotational speed of 1'2.

This is very important in the present invention. cam 1
0 rotates and the small diameter portion 10a comes into contact with the cam follower 8. Since the first lever 3 is swung clockwise by the spring 9, the oscillating punch 5 is rotated by the spring 9, the first lever 3, and the pin 7. It is swung counterclockwise.

When the swinging punch 5 swings counterclockwise, the first lever 3 also swings clockwise, the second lever 4 swings via the rotating shaft 2, and the link arm 13 is moved upward.

As a result, the arm 15 swings until it hits the pin 23, and the pawl 17 rotates the ratchet 16 by one tooth.

When the photoreceptor further rotates and the cam 10 rotates, the large diameter portion 10
The cam follower 8 contacts b, the swing village 5 swings clockwise against the spring 9, the first and second levers 3 and 4 swing in the opposite direction to the above, and the link arm 13 descends. . This causes the pawl 17 to move away from the ratchet 16 along with the force of the spring 18, thereby increasing the dial 22 attached to the ratchet 16 by one scale (the number of copies).
At this time, the ratchet 16 can be prevented from being reversed by the two springs. The above operations are performed while the photoreceptor rotates twice, and the swinging punch 5 swings only once for each two rotations of the photoreceptor. That is, the copy number control signal is generated only once for one copying process.

Therefore, the dial 22 that displays the number of copies increases by only one scale for every two revolutions of the photoreceptor, even though the number of copies control signal is derived from the rotation of the photoreceptor. The present invention is as described above, and when the cam 10 rotates once, the ratchet 16 rotates by a predetermined angle, and since the cam 10 is connected to the photoreceptor, a copy number control signal is generated from the rotation of the photoreceptor based on the rotation. Moreover, since the cam 10 is connected to the photoreceptor through a reduction gear mechanism, the cam 10 can be rotated once by multiple rotations of the photoreceptor, and the number of copies control signal is generated for each multiple rotation of the photoreceptor. can be taken out once.

Therefore, in a type of copying machine in which the document table moves back and forth and the photoconductor rotates multiple times for one copying process, a copy number control signal is extracted from the rotation of the photoconductor once for each multiple rotation of the photoconductor. The number of copies can be accurately and easily controlled without applying vibration to the document table or generating noise.

Further, the rotation of the cam 10, which rotates at a reduced speed together with the photoreceptor, is mechanically transmitted to the ratchet 16 via the swinging punch 5, the first lever 3, the shaft 2, the second lever 4, the link arm 13, the arm 15, etc. Since the copy number control signal is obtained purely mechanically by the rotation of the ratchet 16, there is no need for malfunctions or electrical control circuits, resulting in excellent reliability.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view;
2 is a right front view, FIG. 3 is a left front view, and FIG. 4 is a sectional view taken along the line N-W in FIG. 3. Figure 1 Figure 4 Figure 2 Figure 3

Claims (1)

[Claims] 1. In a copying machine of the type in which the document table reciprocates and the photoreceptor rotates multiple times for one copying process, a shaft 2 is rotatably supported in the frame, and first levers 3 are provided at each end of the shaft 2. , a second lever 4 is fixedly installed, a swinging rod 5 is swingably supported on the frame, one end 5a of which is linked to the first lever 3, and a cam follower 8 is provided at the other end 5b, and this cam follower 8 is brought into contact with the cam 10, and this cam 10 is connected to the photoconductor via a reduction gear mechanism, one end of the link arm 13 is pivotally connected to the second lever 4, and the other end is connected to the substrate 19 by the shaft 14. A pawl 17 is pivotally attached to one end of an arm 15 which is rotatably supported on the arm 15, and engages teeth 16a of a ratchet 16 provided on the base plate 19. The ratchet 16 is oscillated and biased in the direction of engagement with the base plate 19.
1. A copy number control device for a copying machine, characterized in that a reverse rotation prevention spring 20 is provided.