JPH0457511B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an automatic paper feeder, and more particularly to an automatic paper feeder that can be extremely easily attached to and removed from a recording apparatus.

Prior Art For example, word processors, printers, typewriters, etc. have become electronic, recording devices have become faster in general, and the paper used in these devices has become automatically supplied. There is a demand for a structure in which an automatic paper feeder can be attached and detached.

FIG. 1 shows a removable automatic paper feeder that meets these demands.

In FIG. 1, the reference numeral 1 denotes a recording apparatus, and an automatic paper feeder 3 is detachably attached to the recording apparatus 1 using a platen shaft 2. As shown in FIG.

The automatic paper feeder 3 is configured separately from the recording apparatus 1 and has an arm 4 extending toward the platen axis 2.

The tip of the arm 4 is bifurcated so that the platen shaft 2 can be held therebetween.

Further, a rotary lever 5 is rotatably supported by a shaft 6 on the outer side of the arm 4 in the middle thereof.

The rotating lever 5 is formed almost in a U-shape,
A pawl 7 located below the platen shaft 2 is formed at the tip thereof, and a stopper 8 that contacts the outer edge of the arm 4 is formed in the middle.

Moreover, the rotating lever 5 and the arm 4 are located on the lower side of the shaft 6.
A spring 9 is stretched between the lever 5 and the pivot lever 5, giving the pivoting lever 5 a tendency to pivot counterclockwise in FIG.

An operation button 10 is provided at the upper end of the rotating lever 5 at a position beyond the shaft 6.

With the above-described structure, when the automatic paper feeder 3 is attached to the recording device 1 side, the rotating lever 5 is rotated counterclockwise in the figure by the tensile force of the spring 9, and the claw 7 is rotated. It is located below the platen shaft 2, surrounding the platen shaft 2 between the forked tip of the arm 4, and locking the platen shaft 2.

On the other hand, when removing the automatic paper feeder 3, press the operation button 10 with your finger, rotate the rotating lever 5 clockwise about the shaft 6, and apply the tension force of the spring 9 from the lower side of the platen shaft 2 to the claw 7. The platen shaft 2 is released from being restrained by the claws 7.

As a result, the automatic paper feeder 3 becomes free and can be removed from the recording apparatus 1.

By the way, in order to attach the automatic paper feeder 3 that has been removed, it is necessary to lift the automatic paper feeder 3, press the operation button 10 in the opposite manner to that described above, open the pawl 7, and mount the automatic paper feeder.

However, the automatic paper feeding device 3 itself is quite heavy, and the device must be attached and detached while supporting this weight and operating the operation button 10 with a handicapped fingertip, making the operation extremely complicated. .

Sometimes, one person could not attach or detach the device and two people had to operate it.

Purpose The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional paper feeder, and it is an object of the present invention to provide an automatic paper feeding device configured so that it can be attached and detached extremely easily by a person who can lift the device itself. It is an object.

Embodiment FIGS. 2 and 3 illustrate an embodiment of the present invention, in which reference numeral 11 indicates a recording device;
2 shows an automatic paper feeding device separate from this.

A platen 14 rotatably supported via a platen shaft 13 is provided on the recording device 11 side, and a recording head 15 is provided facing the platen 14.

On the other hand, a cassette 16 containing recording paper is removably attached to the automatic paper feeder 12 side.
Further provided are a paper feed roller 17 for feeding the recording paper in the cassette, and a guide plate 18 for the fed recording paper. The tip of the guide plate 18 reaches close to the platen 14.

Furthermore, a paper discharge tray 20 is provided on the automatic paper feeder 12 side to accommodate the recorded recording paper 19.

Furthermore, paper ejection rollers 24 and 25 are attached to rotary shafts 22 and 23, which are horizontally suspended between arms 21 and 21 extending from both sides of the automatic paper feeder 12 in the direction of the platen shaft 13. Temata recording paper 19
is delivered to the paper output tray 20 side.

By the way, the tip of the arm 21 has a U-shaped notch 21a into which the platen shaft 13 fits, as shown in FIG.
are formed, and a rotary lever 26 is rotatably supported in the middle of each arm 21 via the shaft 22.

A pawl 27 for locking the lower side of the platen shaft 13 is formed at the tip of the rotary lever 26 .

An arcuate guiding long hole 28 is formed at the upper end of the rotation lever 26, and when both ends of the long hole 28 are fitted into each long hole 28, a shaft 29 is connected to the left and right arms 2.
It is suspended horizontally between 1 and 21.

Further, torsion coil springs 3 are attached to both ends of the shaft 29.
0 is wound, one end 30a of which is locked to the automatic paper feeder 12 side, and the other end 30b locked to the rotation lever 26 side.

Therefore, the rotating lever 26 is connected to the torsion coil spring 30.
The torsional force gives the pawl 27 the ability to rotate in the direction away from the platen shaft 13.

Further, a bending member 31 is formed at the upper end of the rotating lever 26 and below the elongated hole 28 . This bending portion 31 is located at a position outside the area where the automatic paper feeder 12 is held by hand (for example, when the platen shaft 13
(close to).

Next, the operation of this embodiment configured as above will be explained.

First, when the automatic paper feeder 12 is removed, the rotating lever 26 is rotated clockwise in FIG. 3 by the force of the torsion coil spring 30, and the claw 27 is separated from the notch 21a. It is in.

In this state, lift the automatic paper feeder 12 while considering its center of gravity, align the notches 21a at the tips of the left and right arms 21 with the platen shaft 13, and gently lower it. fitted inside.

Next, the bending member 31 on the upper end side of the rotating lever 26
is in contact engagement with a protrusion of the recording device 11, indicated by reference numeral 11a in FIG. As a result, the rotating lever 26 is rotated counterclockwise in FIG. 3 against the force of the torsion coil spring 30, so that the pawl 27 locks the lower side of the platen shaft 13 fitted into the notch 21a. is rotated.

As a result, the platen shaft 13 is securely held by the periphery of the notch 21a and the claw 27, and the automatic paper feeder 12 is locked.

On the other hand, when removing the automatic paper feeder 12, it is only necessary to lift the device in the opposite manner as described above, but at this time, the platen shaft 13 is still restrained by the claws 27, so the automatic paper feeder 12 is removed from the platen shaft. 13 in the counterclockwise direction in FIG.

However, if the automatic paper feeder 12 is slightly rotated and the bending member 31 of the rotary lever 26 is slightly separated from the protrusion 11a of the recording device and disengaged, the force of the torsion coil spring 30 will cause the rotary lever 26 to is the third
The claw 27 is rotated clockwise in the figure and the platen shaft 13
away from the bottom side.

Therefore, the restraint of the platen shaft 13 by the claw 27 is released, and the automatic paper feeder 12 can be easily removed.

Since this embodiment is configured as described above, there is no need to operate any operation buttons in addition to the operation of lifting the device as in the conventional case, and there is no need for any extra parts.Furthermore, the operation is automatic with only the operation of attaching and detaching. It can be locked and unlocked at any time.

Effects As is clear from the above explanation, according to the present invention, a rotary lever is provided on the automatic paper feeder side, which can be moved to the locked position and unlocked depending on whether it is placed on the recording device side or not placed on the recording device side. Because it adopts this feature, the automatic paper feeder can be attached and detached without any need for external operation buttons, making attachment and detachment work extremely easy.

[Brief explanation of the drawing]

FIG. 1 is a side view illustrating a conventional structure, FIGS. 2 and 3 are illustrative of an embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is a perspective view of essential parts. 11...Recording device, 12...Automatic paper feeder, 13...
Platen shaft, 21...arm, 21a...notch, 26...
Rotating lever, 27...claw, 30...torsion coil spring, 31...bending member.

Claims (1)

[Scope of Claims] 1. An automatic paper feeder that can be attached to and detached from a recording device, comprising a lever that can be rotated between a locked position and an unlocked position with respect to the recording device, and a lever that can be rotated in the unlocking direction. It includes a spring member that provides movement and a member that interlocks with the lever and engages with the recording device side, and when the member engages with the recording device side, the lever moves against the force of the spring member. is rotated in the direction of the lock position to achieve locking with the recording device, and when the member is not engaged with the recording device side, the lever is moved to the unlocked position by the force of the spring member. An automatic paper feeding device that is characterized by rotating toward the direction. 2. The automatic paper feeder according to claim 1, wherein the member is installed outside an area where it can be held by hand.