JPH0333615B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a paper feeding device that can automatically set the paper feeding state when a box containing paper is inserted into the paper feeding device of a copying machine. It is something.

BACKGROUND OF THE INVENTION Conventional paper feeding devices in copying machines require a handle to be operated each time a paper storage box is loaded or unloaded.

For example, as shown in FIG. 1, when a paper push-up lever b is pivotally mounted on a frame a so as to be able to rise and fall freely, a locking arm c is integrally attached to the lever b.
is attached, and a tension coil spring d is stretched between the locking arm c and the frame a so that the paper push-up lever b is always erected upward;
When the paper push-up lever b is lowered in the horizontal direction against the tension of the tension coil spring d, the locking arm c is moved to maintain this state.
A pin e is formed which can be locked to the frame a, and an operation and release handle f for swinging the pin e is pivotally attached to the frame a, and on the bottom surface of the outer box of the double-bottomed paper storage box g, A hole (not shown) into which the push-up lever b can fit is provided.

Problem to be Solved In order to escape from the paper storage box g, the actuation/release handle f is swung clockwise, the locking lever o is swung clockwise by the pin e, and
It goes without saying that the paper push-up lever b in the upright state must be lowered, but also when loading the paper storage box g in the direction Y perpendicular to the paper feeding direction x, the activation and release handles must be Rotate f counterclockwise and remove the locking pin e that is integrated with the handle f.
had to be removed from the locking arm c, making attachment and detachment of the paper storage box g complicated.

Means and Effects for Solving the Problems The present invention relates to an improvement of a paper feeding device for a copying machine that eliminates such drawbacks, and includes a release handle and a holding lever that are integrated with a paper push-up lever, and a release handle and a holding lever that are integrated with a paper push-up lever. A biasing means for biasing the raising lever in the pushing up direction; a first holding claw for locking the holding lever; a transmission piece that retracts the holding claw to release the locking of the holding lever; a second holding claw that locks the holding lever; a protrusion provided integrally with the second holding claw; a protrusion provided on the paper storage box corresponding to the paper storage box, the protrusion contacts the protrusion immediately after the paper storage box is removed, and temporarily retracts the second holding claw to release the locking of the holding lever. , a locking position between the first holding claw and the holding lever and a locking position between the second holding claw and the holding lever are different.

Since the present invention is configured as described above,
When the paper storage box is loaded into the paper feeding device, the first holding claw is retracted via the transmission piece just before the loading is completed;
Since the holding lever is unlocked, the paper pushing up lever integrated with the holding lever can push up the paper in the paper storage box by the urging means.

That is, when setting the paper feeding state, there is no need to operate a lever and it is sufficient to simply insert the paper storage box.

Also, when pulling out the paper storage box, operate the release handle to lock the holding lever to the second holding claw, and when the paper storage box is pulled out, the protrusion on the paper storage box side will engage the second holding claw immediately after the paper storage box is pulled out. The second holding claw comes into contact with the protrusion on the side and retracts to release the holding lever, and the first holding claw, which can be locked by pulling out the paper storage box, locks the holding lever. This allows you to prepare for loading the paper storage box again.

Therefore, in the present invention, when loading the paper storage box, there is no need for any preliminary operation at all, and the paper feeding state can be automatically set by pushing the paper storage box. .

As described above, in the present invention, when attaching and detaching the paper storage box, it is sufficient to operate the release handle only once, so the operation is extremely simple.

Embodiment An embodiment of the present invention shown in FIGS. 2 to 6 will be explained below. 1 is a box having a hole (not shown) in the bottom of the outer box into which a paper pushing lever 10 described later can be inserted. This is a paper storage box. Paper 2 of a predetermined size is stored in a stacked state in the paper storage box 1, and the paper storage box 1 is guided by the guide rail 6 from the opening 4 of the front side frame 3 to the back side frame. 5, and conversely, it is carried out from the back side frame 5 via the guide rail 6 to the outside of the front side frame 3.

In addition, the front side frame 3 and the back side frame 5
A transmission shaft 7 extends parallel to the guide rail 6.
is rotatably supported, a release handle 8 is integrally fixed to the front end of the transmission shaft 7, and a holding lever 9 is integrally fixed to the rear side of the transmission shaft 7. A paper push-up lever 10 and a guide rail 6 are integrally fixed to the center of the transmission shaft 7, and the depth-side frame 5 and the holding lever 9 are fixed so that they can be swung counterclockwise (paper push-up direction) in FIG. In addition, a tension coil spring 11 is used as a biasing means.
is installed.

Further, a shaft 12 is mounted on the depth side frame 5 adjacent to the holding lever 9 and perpendicular to the transmission shaft 7, and a first holding claw 1 serving as a first holding means is mounted on the same shaft 12.
3 and a second holding claw 14 serving as a second holding means are swingably supported, and both ends of a torsion coil spring 15 wound around the shaft 12 are attached to the both holding claws 13,
The fourteen claws 13a, 14a are engaged with both the holding claws 13, 14 so that they approach each other.

Therefore, the first holding claw 13 has a transmission piece 1, which is a first releasing means, that can collide with the rear wall 1a of the paper storage box 1 when the paper storage box 1 is inserted into the copying machine.
6 are integrally attached. The second holding claw 14 is formed in an L-shape, and the tip 14c of the horizontal piece 14b projects upward so that it can fit into the horizontal hole 1b near the rear end of the paper storage box 1. The second release means is formed in a shape such that the second release means is formed.

Further, a feed roller 17 is arranged above the push-up lever 10 at a position higher than the opening 4,
By rotating the feed roller 17 in the counterclockwise direction, the paper 2 in the paper storage box 1 is sent out in the x direction perpendicular to the loading direction Y of the paper storage box 1.

Note that the claw portion 13a of the first holding claw 13 is set to be located slightly above the claw portion 14a of the second holding claw 14.

Since the embodiment shown in FIGS. 2 to 6 is constructed as described above, the embodiment shown in FIGS.
As shown in the figure, when the paper storage box 1 is pulled out of the copying machine main body, the holding lever 9 is hooked on the claw portion 13a of the first holding claw 13, and the release lever 8 and the paper push-up lever 10 are It is held approximately horizontally.

In this state, by pushing the paper storage box 1 into the copying machine main body through the opening 4 via the guide rail 6, when the paper storage box 1 reaches a predetermined position, the rear wall 1a of the paper storage box 1 The transmission piece 16 collides with the tip of the transmission piece 16, and the transmission piece 16 is pushed, and the first holding claw 1 resists the spring force of the torsion coil spring 15.
3 is swung clockwise in FIG.
The holding lever 9 hooked on the claw part 13a of the holding claw 13 is released from the claw part 13a, and the spring force of the tension coil spring 11 causes the holding lever 9, paper push-up lever 10 and release handle 8 to move to the second position. In the figure, it is swung in the α direction, which is counterclockwise.
By upward swinging of the paper push-up lever 10, the paper 2 in the paper storage box 1 is pressed against the delivery roll 17, and the paper feed state is set.

Next, when pulling out the paper storage box 1 from the copying machine main body, turn the release lever 8 in the clockwise direction β in FIG.
When turned in the direction, the holding lever 9 descends from above,
As a result of this descent, the second holding claw 14 is moved back to the position 14' indicated by the dotted line in FIG. The second holding claw 14 is hooked onto the holding lever 9.

As the release lever 8 swings in the β direction, the paper push-up lever 10 swings downward and is removed from the hole in the paper storage box 1, so that the paper storage box 1 can be pulled out.

When the paper storage box 1 is pulled out in the direction opposite to Y in such a state where it can be pulled out, the first holding claw 13 is rotated by the spring force of the torsion coil spring 15 to move the holding lever 9. The tip protrusion 1 of the second holding claw 14 is located directly above the
4c is pushed down by the rear end projection 1c of the paper storage box 1, and the second holding claw 14 is swung in the γ direction, which is counterclockwise in FIG. 6, about the shaft 12, and the claw portion 14a is It is removed from the holding lever 9. At this time, the claw portion 13a of the first holding claw 13 is already attached to the holding lever 9.
As shown in FIG. 2 and FIG.
is replaced, and preparations are made for loading the next paper storage box 1.

In this way, in the embodiment described above, only when attempting to pull out the paper storage box 1 from the paper feeding state,
It is sufficient to simply turn the release handle 8 in the β direction, and when the paper storage box 1 is inserted, the paper feeding state can be automatically set without requiring any operation. Therefore, the operation for loading and unloading the paper storage box 1 becomes much easier.

In the embodiment shown in FIGS. 2 to 6, the paper storage box 1 is configured to be inserted into the copying machine main body through the opening 4, but as shown in FIG. The paper storage box 1 may be configured to be inserted into the main body of the copying machine along the direction X.

In the embodiment shown in FIG. 7, the holding lever 9' is further bent in a direction parallel to the transmission shaft 7, and the shaft 12'
is oriented in a direction parallel to the rotation axis of the feed roller 17, and a first holding claw 13' and a second holding claw 14' are pivotally mounted on the same axis 12', and these holding claws 13', 14'
By setting the height of the storage box 1 to be lower than the height of the paper storage box 1, substantially the same effects as those of the embodiments shown in FIGS. 2 to 6 can be obtained.

Although the present invention has been described above in detail with respect to the embodiments shown in the drawings and the embodiments not shown in the drawings, the present invention is not limited to such embodiments and can be modified without departing from the spirit of the invention. The design can be freely modified as necessary.

Effects of the Invention The present invention does not require any preliminary operation when loading a paper storage box into a paper feeding device, and can automatically set the paper feeding state by pushing the paper storage box. In addition, when pulling out the paper storage box, the paper storage box can be set to a drawable state by simply moving the paper push lever to the second non-pushing position, making the operation extremely simple and convenient.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically illustrating a conventional copying machine paper feeding device, FIG. 2 is a perspective view illustrating an embodiment of a copying machine paper feeding device according to the present invention, and FIGS. 3 to 6 3 is an enlarged side view of the main part illustrating the operation of the embodiment, FIG. 3 shows the state before loading the paper storage box, FIG. 4 shows the state after the loading is completed, and FIG. 5 shows the state after the paper storage box is removed. FIG. 6 shows a state in which the paper storage box is pulled out, and FIG. 7 shows a perspective view of another embodiment. 1...paper storage box, 2...paper, 3...front side frame, 4...opening, 5...back side frame, 6...guide rail, 7...transmission shaft, 8...release handle, 9,
9'...Holding lever, 10...Paper push-up lever, 1
1... tension coil spring, 12, 12'... shaft,
13, 13'...first holding claw, 14,14'...second holding claw, 15,15'...torsion coil spring, 1
6, 16'...transmission piece, 17...feeding roller.

Claims (1)

[Claims] 1. A release handle and a holding lever that are integrated with a paper push-up lever, a biasing means that urges the paper push-up lever in the push-up direction, a first holding claw that locks the hold lever, and a paper push-up lever. a transmission piece that comes into contact with the paper storage box immediately before the storage box is loaded and retracts the first holding claw to release the holding lever; and a second holding claw that locks the holding lever. and a protrusion provided integrally with the second holding pawl, and a protrusion provided on the paper storage box corresponding to the protrusion, which contacts the protrusion immediately after the paper storage box is pulled out and temporarily holds the second holding claw. a projection for retracting the second holding claw and releasing the locking of the holding lever, and a locking position of the first holding claw and the holding lever and a locking position of the second holding claw and the holding lever. A paper feed device for a copying machine characterized by different positions.