JPS621163Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper feeding device in a paper feeding mechanism of a copying machine or the like.

Recently, it has become necessary to use different colors, sizes, etc. of copies in order to streamline and rationalize office work in copying machines and the like. However, in most conventional copying machines, copies cannot be made unless copying paper is loaded one sheet at a time, which is very inconvenient. Therefore, a cassette was devised that allowed a certain number of sheets to be loaded into a copier or the like at once.

This has made it possible to make copies of the desired size, color, etc. by preparing a plurality of cassettes of the required sizes and replacing the cassettes as necessary.

However, this cassette method also requires a place to store unused cassettes, and when a cassette containing copy paper of the desired size is not installed in the copying machine, the unnecessary cassette is removed and a new one is inserted into the desired size. Since a cassette of the same size had to be installed in a copying machine, etc., great care had to be taken in its handling.

The present invention eliminates the above-mentioned inconveniences, and also relates to a paper feed switching device for copying machines, etc., which is equipped with a cassette switching device, and allows paper feeding from the inside of the cassette to be switched to any desired position using a lever or the like attached to this switching device. This allows paper to be selectively fed from the cassette.

Furthermore, in this method, anyone can easily select the copy paper they wish to use by simply operating the switching lever of the copying machine, for example, by moving the switching lever up or down.

In addition, in general, paper feeding devices for selecting paper feeding trays have complicated paper feeding mechanisms and mechanisms for selecting cassettes, tend to be large in size, and are expensive in terms of cost. There were many things that happened.

However, the present invention enables a paper feeding device with a simple mechanism in a copying machine etc. that has multiple paper feeding trays, making it convenient and quick to switch cassettes.
To provide a cassette switching device capable of accurately switching cassettes.

The present invention is applicable not only to copying machines as described above, but also to switching devices in thin material feeding devices.

Hereinafter, the present invention will be explained in detail by giving an example.

FIG. 1 is a sectional view of a feeding device according to the present invention adapted to a copying machine, and the portion surrounded by a dotted line is the feeding device according to the present invention. This feeding device section is provided with removably attached cassettes 1 and 11 for storing two different types of copy paper.

Further, details of the above-mentioned feeding device are shown in FIG. 2. At the bottom of the cassettes 1, 11, bottom plates 2, 12 are provided which are movable up and down.
Copy sheets P ₁ and P ₂ are stacked on the paper 2 . Further, when the cassettes 1 and 11 are respectively attached to the feeding device, push-up mechanisms 3 and 13 that push up the bottom plates 2 and 12 are provided.
is provided opposite the cassette insertion section.

Also, above the cassettes 1 and 11 are copy sheets P ₁ ,
Paper feed rollers 4 and 14 for sequentially feeding P ₂ are provided to rotate around shafts 5 and 15. These paper feed rollers 4, 14 only rotate when feeding paper, and otherwise remain stationary.The roller surfaces are formed in a substantially semicircular shape, and the chord surfaces 4a,
14a faces the copy sheets P ₁ and P ₂ , and when the chord surfaces 4 b and 14 b come into contact with the top copy sheets P ₁ and P ₂ during rotation, the top copy sheet is sent out. The rotation of the paper feed rollers 4, 14 is controlled by a sprocket (not shown) which is constantly rotated by transmitting rotational force from a drive source to one end of the shafts 5, 15 of the rollers via clutches 6, 16. ) is installed and executed. In other words, clutch 6, 16
is a transmission member that transmits the rotational force of the sprocket to the shafts 5 and 15, and when either clutch 6 or 16 acts, the paper feed roller 4 or 14 is rotated. Therefore, if the rotation of the clutches 6 and 16 is not restricted in any way, the rotation of the sprocket will be directly transmitted to the shaft.

As can be understood from the above explanation, in the present invention, when copy sheets stored in a cassette are selectively fed, either one of the paper feed rollers 4 and 14 can be selectively driven. The switching lever 20 implements this. The switching lever 20 is provided at one end so as to rotate about a shaft 21, and has a locking pin 20a fixed near its center for locking the lever in position A or B.
This locking is effected by interaction with a suitably contoured locking spring 23 mounted on a piece of a T-shaped latch mounting plate 22 secured to the feeder. That is, the switching lever 20 is in the state shown in FIG. 2, and when the switching lever 20 is moved upward, the lock spring 23 is deflected by the lock pin 20a, and the lock pin 20a passes over the convex portion of the lock spring 23, causing the spring 23 to move upward. tries to return to its original state. At this time, the recess on the A side of the lock spring 23 is engaged with the lock pin 20a, and the switching lever 20 is held in the state shown in FIG. 4, which will be explained later.

On the other hand, the center portion of one piece of the latch mounting plate 22 is pivotally supported at a symmetrical position, and one end of the latch mounting plate 22 is biased by a common spring 24, and this biasing force causes the other end of the clutch 6, 16 to be Selective latches 7, 17 are provided which selectively engage one or the other. The selection latches 7, 17 are selection regulating members for selecting the clutches 6, 16, which are transmission members, and regulating the transmission of rotational force to the paper feed rollers 4, 14. Moreover, this latch 7,1
Release pins 7a and 17 are provided at the mounting portion of the spring 24 at 7 to release the clutches 6 and 16 from close contact with each other when the switching lever 20 is switched up and down.
a is fixed.

Furthermore, a paper feeding latch 25 is rotatably provided on the latch mounting plate 22, and a spring 26 is attached which is always biased clockwise.
This paper feeding latch 25 has a spring 26 at each end, similar to the selection latches 7 and 17 described above.
It is designed to be in close contact with clutches 6 and 16 due to its auxiliary forces. That is, in contrast to the selection latches 7, 17, the feed latch 25 is normally in close contact with both clutches 6, 16, and by being in close contact with the clutches 6, 16, for example via a spring 26, This is a paper feeding regulating member that regulates the action of the roller 16 and the transmission of rotational force to the paper feeding rollers 4 and 14. On the other hand, the paper feeding latch 25 is connected to the clutches 6 and 16.
When the paper feed rollers 4 and 14 are further apart, rotational force can be transmitted to the paper feed rollers 4 and 14. Therefore, a solenoid 27 that operates based on a paper feed signal is connected to the paper feed latch 25.
is separated from each clutch 6,16. This solenoid 27 separates the paper feed latch 25, which is in a close contact state, from the clutches 6, 16 against a spring 26, which is a biasing means, and enables the transmission of rotational force to the paper feed rollers 4, 14. This is a release means.

The present invention is constructed as described above, and its operation will be explained below.

First, the case where the switching lever 20 is pushed down will be explained. In this case, the state shown in FIG. 2 will occur. Further details are shown in FIG. That is, by pushing down the switching lever 20, the selection latch 17 is released from the clutch 16, and the clutch 16 is released from the locked state. On the other hand, the upper selection latch 7 maintains the clutch 6 in a locked state by a spring 24. In this state, if a paper feed signal is input, the solenoid 27 is activated and the paper feed latch 25 enters the state shown by the dotted line in FIG. Therefore, the lower clutch 16 becomes unlocked and transmits the rotational force from the sprocket to the shaft 15. Accordingly, the paper feed roller 14 rotates to feed the uppermost copy sheet _P2 , and is transported to the copying process by the action of the next stage transport roller 18.

Conversely, move the switching lever 20 to the upper cassette 1.
Pull up to select. As a result, the switching lever 20 is held as shown in FIG. 4, and the selection latch 7 releases the lock of the clutch 6. On the other hand, the lower selection latch 17 locks the clutch 16 by the spring 24.
Therefore, when a paper feed signal is input, the paper feed latch is moved away from the clutch 7 by the operation of the solenoid. Therefore, the rotation is transmitted to the shaft 5 via the clutch 7, the upper paper feed roller 4 rotates, and the uppermost copy paper _P1 is fed and transported to the copying process by the action of the transport roller 8.

As will be explained later, the latches 7, 17 and 2 are provided on the circumferential surface of the clutches 6, 16.
5 is provided, and rotation of the clutches 6, 16 is regulated by the engagement between this engaging portion and the latch. Also, the solenoid 27 operates the paper feed latch 25 and the clutch 6 or 16 from the time when the paper feed signal is input.
operation until the point at which the engagement is released. Therefore, when the paper feed latch 25 slides on the circumferential surface of the clutch 6 or 16 and the engaging portion of the clutch 6 or Y16 faces the paper feed latch 25, its rotation is restricted. Therefore, the paper feed roller stops after one revolution.

As explained above, according to the present invention, a transmission mechanism is provided for transmitting rotational force to the paper feed rollers facing each other, and the latch selected by the switching lever is released by the transmission mechanism, and the desired feeding is performed. By making the paper roller rotatable and releasing the locking latch from each of the above transmission mechanisms based on a paper feed signal, the desired selected paper feed roller rotates and feeds the paper in the cassette. Therefore, it is possible to rotate a desired paper feed roller by a simple mechanism such as providing a transmission mechanism for each and releasing the locking latch, and a configuration for selectively driving the paper feed roller is provided. It is very simple, and the selection operation is simple and anyone can easily perform it.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the application of the present invention to a copying machine, Fig. 2 is a sectional view of main parts showing details of the invention, and Figs. 3 and 4 are for explaining the operation of the invention. FIG. 1, 11: Cassette, 4, 14: Paper feed roller,
6, 16: Clutch, 7, 17: Selection latch,
20: Switching lever, 25: Paper feed latch, 2
7: Solenoid.

Claims (1)

[Scope of claim for utility model registration] A plurality of cassettes 1 containing paper in the main body of the device,
11 and selectively feeds paper in each cassette, paper feed rollers 4 and 14 are provided facing each cassette and rotate to feed the paper.
a drive unit for rotationally driving the paper feed roller; respective transmission members 6 and 16 that transmit rotational force from the drive unit to each of the paper feed rollers; and a drive unit facing each of the transmission members. A paper feeding regulating member 25 for regulating the transmission of rotational force from the normal drive unit to the paper feeding roller via the biasing member 26
and a selection regulating member 7, 17 provided corresponding to each of the transmission members and for enabling the rotational force from the drive unit to be transmitted only to the selected one transmission member and regulating the other transmission members. a switching lever 20 that is connected to the selection restriction member and for selecting one of the selection restriction members; and a switching lever 20 that operates against the biasing member based on the sheet feed signal to switch the sheet feeding restriction member. a release means 27 for releasing the member from each transmission member and transmitting the rotational force of the drive unit to each of the paper feed rollers, and a release means 27 for releasing the member from each transmission member and transmitting the rotational force of the drive unit to each of the paper feed rollers, A paper selection and feeding device characterized by being able to drive a paper roller.