JPS6038183A - automatic paper feeder - Google Patents

Abstract

PURPOSE:To facilitate attachment and detachment work by simply attaching and detaching the title paper feed apparatus only by raising the same, by providing a revolving lever displaced to a lock position and a release position corresponding to a placed and non-placed states with a recording apparatus side. CONSTITUTION:U-shaped notch parts 21a inlaid with a platen shaft 13 are formed to the leading ends of arms 21, 21 extending from both sides of a paper feed apparatus toward the platen shaft 13 and the halfway part of a revoling lever 26 is pivotally supported on the way of each arm through a shaft 22 in a freely revolvable manner. The lever 26 receives a revolving habit toward such a direction that the pawl 27 thereof is separated from the shaft 23 by the torsion force of a torsion coil spring 30. When the paper feed apparatus is raised and fallen so as to allow the notch parts 21a and the shaft 13 to correspond with each other, both of them are inlaid and a bent member 31 brought into contact and engagement with a projection 11a while the pawl 27 engages the under side the shaft 13 (a lock state). When the paper feed apparatus is raised and the bent member 31 is slightly separated from the projection 11a, the lever 26 is revolved by the force of the spring 30 and the pawl 27 is separated and detached from the under side of the shaft 13.

Description

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, and recording devices in general have become faster.
As the paper used in these devices is automatically supplied, there is a need for a structure in which an automatic paper feeder can be attached to and detached from the recording apparatus.

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

In FIG. 1, the reference numeral 1 denotes a recording device, and an automatic sheet feeding device 3 is detachably attached to the recording device 1 using a platen shaft 2 thereof.

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

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

Further, a spring 9 is stretched between the rotary lever 5 and the arm 4 on the lower side of the shaft 6, giving the rotary lever 5 a counterclockwise rotation behavior in FIG. ing.

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

When the automatic paper feeder 3 is installed on the recording device 1 side based on the structure described above, the rotating lever 5 is rotated counterclockwise in the figure by the tensile force of the spring 9, and the claw is rotated. 7
is located below the platen shaft 2, and is arranged to surround the platen shaft 2 between it and the forked tip of the arm 4,
The platen shaft 2 is locked.

On the other hand, when removing the automatic paper feeder 3, the operation button 10
Press with your finger and rotate the rotating lever 5 clockwise about the shaft 6 to release the claw 7 from the underside of the platen shaft 2 against the tension of the spring 9 to release the platen shaft 2 from being restrained by the claw 7. solve.

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

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 feeder 3 itself is quite heavy.
The device must be attached and detached while supporting this weight and operating the operation button 10 with the tip of a handicapped finger, 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 following drawbacks of the conventional paper feeder, and provides an automatic paper feeder configured so that it can be attached and detached extremely easily by a person who can lift the device itself. The purpose is to

Embodiment FIGS. 2 and 3 illustrate an embodiment of the present invention. In the figures, reference numeral 11 indicates a recording device, and 12 indicates a separate automatic paper feeding device.

A platen I4 rotatably supported via a platen shaft I3 is provided on the recording apparatus II side, and a recording head 15 is provided facing the platen I4.

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

Further, a paper discharge tray 20 for storing the recorded recording paper 19 is provided on the automatic paper feeder I2 side.

Further, rotating shafts 22 and 23 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.
Paper discharge rollers 24 and 25 are attached to the rollers 24 and 25, and the recording paper 19 is guided between them and sent to the paper discharge tray 20 side.

By the way, as shown in FIG. 3, a U-shaped notch 21a into which the platen shaft 13 is fitted is formed at the tip of the arm 21, and a portion of the rotating lever 26 is inserted into the shaft at the middle of the arm 2j. It is rotatably supported via a 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 arc-shaped guide slot 28 is formed at the upper end of the rotating lever 26, and when both ends of the shaft 29 are fitted into each slot 28, the shaft 29 is moved between the left and right arms 21°. It is suspended horizontally.

Further, a torsion coil spring 30 is wound around both ends of the shaft 29, one end 30a of which is locked to the automatic paper feeder 12 side, and the other end 30b is locked to the rotating lever 26 side. ing.

Therefore, the rotating lever 26 is given a tendency to move the pawl 27 in the direction away from the platen shaft 13 by the torsional force of the torsion coil spring 3°.

Also, at the second end of the rotary lever 26 and through the long hole 28,
A bent side 31 is formed on the lower side. This bending portion 31 is installed at a position outside the area where the automatic paper feeder 12 is held by hand (for example, at a position close to the platen shaft 13).

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

First, when the automatic paper feeding device 12 is removed, the rotary lever 26 is moved to the third position by the force of the torsion coil spring 3o.
It is rotated clockwise in the figure, and the pawl 27 is in the notch 21a.
It is in a state far away from.

In this state, lift the automatic paper feeder 12 taking into account its center of gravity, align the notches 2]a at the ends of the left and right arms 2I with the platen shaft 13, and gently lower it.
3 is fitted into the notch 2Ia.

Subsequently, the bending member 31 at the upper end of the rotary lever 26 comes into contact with and engages with the protrusion of the recording device +1, indicated by the reference numeral 11a in FIG. As a result, the rotating lever 26 is rotated by the torsion coil spring 30.
The claw 27 is rotated Q so as to lock the lower side of the platen shaft 13 fitted in the notch 2Ia.

As a result, the platen shaft 13 is connected to the periphery of the notch 2]a and the claw 27.
The paper feeder 1 is securely held by the automatic paper feeder 1.
2 is locked.

On the other hand, when removing the automatic paper feeder 12, it is sufficient to hold the device in the opposite direction as described above, but at this time, the claw 2H is still attached.
Since the platen shaft 13 is restrained, the automatic paper feeder 12 is rotated counterclockwise in FIG. 2 about the platen shaft 13.

However, if the automatic sheet feeder 12 is rotated slightly and the bent portion 31 of the rotary lever 26 is slightly separated from the protruding portion 11a of the recording device and is not engaged, it will become stuck under the force of the torsion coil spring 30. The movable lever 26 is rotated clockwise in FIG.
7 is separated from the lower side of the platen shaft I3.

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

Since this embodiment is constructed as described above, there is no need to operate any operation buttons in addition to the conventional operation of holding and removing the device, and there is no need for any extra parts. Can lock and unlock automatically.

Effects As is clear from the above explanation, according to the present invention, a structure is adopted in which the automatic paper feeder side is provided with a rotary lever that 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. Therefore, the automatic paper feeder can be attached and detached without any need for external operation buttons, and the attachment and detachment work is extremely easy.

[Brief explanation of the drawing]

Figure 1 is a side view explaining the conventional structure, Figures 2 and 3
The drawings are for explaining one embodiment of the present invention, with FIG. 2 being a side view and FIG. 3 being a perspective view of the main parts. 11...Recording device 12...Automatic paper feeder 13...
・Platen shaft 21... Arm 21 a - Notch 26... Rotating lever 27...
Claw 30...Torsion coil spring 31...Bending member

Claims (1)

[Claims] l) An automatic paper feeder that is detachable from the recording device and includes an odor material and a member that is interlocked with the lever and engages with the recording device, and when the member engages with the recording device, the spring member Achieving locking with the recording device by rotating the lever in the direction of the locking position against the force of
The automatic paper feeder is further characterized in that the lever is rotated toward the unlocked position by the force of the member.