JPH09207396A - Manual paper-feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manual paper-feeding device capable of speedily feeding large-width paper onto a platen by an external operation without impairing an automatic line feed operation for the paper. SOLUTION: This device comprises a knob shaft 4 held on a case main body 3 in such a way as to be parallel to a platen shaft 2 and freely rotatable, a turning-force transmission means 11 for transmitting the turning force of the knob shaft 4 to the platen shaft 2, and a platen knob 4A mounted on the external end of the knob shaft 4, and it has the structure in which the plateut shaft 2 is manually operated by controlling the turning of the platen knob 4A. The turning-force transmission means 11 comprises a switch gear mechanism 12 for variably setting a large speed ratio from a small one by pressing the platen knob 4A along the knob shaft 4 from outside, and an original-position return mechanism 15 for returning the engagement condition of the switch gear mechanism 12 to an engagement condition that the switch gear mechanism 12 is in before switched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper manual feeding device, and more particularly to a paper manual feeding device equipped in a dot serial printer or the like for line feed.

[0002]

2. Description of the Related Art Paper feeding of a dot serial printer includes a method of pushing a paper handling-related switch on a printer operation panel or manually rotating a platen knob to feed the paper. Then, when the paper is fed using the latter platen knob, when the paper feed amount is large, the platen knob must be rotated a lot with the current gear setting.

A conventional example is shown in FIGS. The conventional example shown in FIGS. 3 to 4 is mounted on a dot serial printer or the like, and reference numeral 50 indicates a platen and reference numeral 52 indicates a platen shaft. Further, a knob shaft 54 is provided in parallel with the platen shaft 52. Symbol 60
Shows a case body that holds the platen shaft 52 and the knob shaft 54 rotatably.

The knob shaft 54 is equipped with a drive gear 58 driven by a drive motor and a drive gear (not shown). The rotational force of the drive gear 58 is transmitted to the platen shaft 52 via the first and second transmission gears 61 and 62. A platen knob 54A for manually feeding the sheet on the platen 50 (feeding a minute line on the sheet) from the outside is provided at the tip end portion (right end portion in FIG. 3) of the knob shaft 54 described above. FIG. 5 shows an external view of the dot serial printer 100 equipped with the conventional example shown in FIG. 3 (or FIG. 4).

[0005]

However, in the above-mentioned conventional example, in order to operate the platen knob 54A from the outside to significantly feed the paper on the platen 50, the platen knob 54A must be rotated many times. In addition, the inconvenience of poor operability and poor workability has always occurred.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet manual feeding device which can improve the disadvantages of the conventional example and can rapidly perform a large sheet feeding on the platen 50 by an external operation.

[0007]

In order to achieve the above object, in the invention according to claim 1, a knob shaft mounted parallel to the platen shaft and rotatably held by the case body, and a rotating force of the knob shaft. And a platen knob mounted on the outer end of the knob shaft, and a structure for manually rotating the platen shaft from the outside by rotating the platen knob. . A switching gear mechanism that variably sets the rotational force transmitting means from a smaller speed ratio to a larger speed ratio by externally pressing the platen knob along the knob shaft, and the gear meshing state of the switching gear mechanism are switched according to the switching. A method is used in which it is configured by an original position returning mechanism that returns the gear mechanism to the state before switching.

For this reason, in the invention according to claim 1,
First, when the platen knob is rotated in the state shown by the solid line in FIG. 1, the switching gear mechanism with a small speed ratio functions and the sheet on the platen is fed by a fine line feed as in the case of print output.

Next, the platen knob is moved to the arrow A in FIG.
When it is pressed in the direction of, the switching gear mechanism with a large speed ratio is switched. When the platen knob is rotated in this state, the rotation of the platen shaft is expanded and the amount of paper feed on the platen is increased.

As soon as the pressing force on the platen knob is released, the original-position returning mechanism is actuated to move the knob shaft to the right in FIG. 1, and again the state shown by the solid line in FIG. Can be switched.

According to a second aspect of the present invention, the above-mentioned switching gear mechanism includes a pair of switching gear mechanism parts for setting a small speed ratio and a pair of other switching gear mechanism parts for setting a large speed ratio. And the method is adopted. Therefore, also in the invention described in claim 2, it is possible to obtain the same function as that of the invention described in claim 1.

According to a third aspect of the invention, a knob shaft holding member, which is provided in the case body, holds the knob shaft rotatably and reciprocally along the axis thereof, and the knob shaft. The fixing member for the spring fixed to the coil spring, the coil spring that is provided between the fixing member for the spring and the above-mentioned knob shaft holding member, and constantly presses the knob shaft toward the platen knob side, and the end portion of the knob shaft. The knob shaft is formed of a pin that prevents the knob shaft from jumping out of the case body. Therefore, the invention according to claim 3 can also obtain the same function as the invention according to claim 1 described above.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIG. In FIG. 1, reference numeral 1 indicates a platen, and reference numeral 2 indicates a platen shaft mounted on the central axis of the platen 1. The platen shaft 2 is rotatably held by the case body 3. This platen shaft 2
A knob shaft 4 is provided in parallel with. The knob shaft 4 is rotatably and reciprocally held along the axis of the case body 3 described above.
The left end of the knob shaft 4 in FIG. 1 is equipped with a pin 4a, which prevents the knob shaft 4 from jumping to the right in FIG. A platen knob 4A is attached to the outer end of the knob shaft 4.

Reference numeral 11 indicates a rotational force transmitting means for transmitting the rotational force of the knob shaft 4 described above to the platen shaft 2.
This rotational force transmission means 11 variably sets the speed ratio from a smaller speed ratio to a larger speed ratio by pressing the platen knob 4A from the outside along the knob shaft 4 to change the gear ratio.
2 and an original position returning mechanism 13 for returning the meshing state of each gear of the switching gear mechanism 12 to the state before the switching of the switching gear mechanism 12.

As shown in FIG. 1, the switching gear mechanism 12 includes a pair of switching gears 12A for setting a small speed ratio.
One switching gear mechanism section 12A consisting of a and 12Ab
And a pair of switching gears 12B for setting a large speed ratio
The other switching gear mechanism portion 12B composed of a and 12Bb is provided. Of these, the switching gears 12Aa and 12Ba
Is fixedly mounted on the knob shaft 4 at a predetermined interval,
Further, the switching gears 12Ab and 12Bb are fixedly mounted on the platen shaft 2 with a predetermined space therebetween.

1 and 2, 12Bb and 12Ab are provided on the platen shaft 2 from the right to the left at predetermined intervals, and on the knob shaft 4, from the right to the left. 12a and 12A are installed at a predetermined interval.

In the state shown in FIGS. 1 and 2, the pair of switching gears 12Aa, 12A for setting a small speed ratio.
When Ab is meshed and the platen knob 4A is pushed in the direction of arrow A, the meshing of the switching gears 12Aa, 12Ab is released and the pair of other switching gears 12Ba, 12Bb for setting a large speed ratio are meshed. It is like this.

On the knob shaft 4, a drive gear 13 driven by a drive motor and a drive gear 5 (not shown).
However, the switching gear 12Aa and the switching gear 12Ba described above are
Equipped with fixed between and. In the present embodiment, the drive gear 13 is integrated with the switching gear 12Aa and incorporated as a double gear.

Reference numeral 15 indicates an original position returning mechanism. The home position return mechanism 15 is used for the case body 3 of the knob shaft 4.
It is equipped on the side and has a function of returning the gear meshing state of the switching gear mechanism 12 to the state before the switching gear mechanism 12 is switched.

The home position return mechanism 15 is provided in the case body 3 described above and is provided with a knob shaft holding member 16 for holding the knob shaft 4 rotatably and reciprocally along its axis, and a knob. A spring fixing member 1 fixedly mounted on the platen knob 4A side of the shaft 4 described above.
7, a coil spring 18 that is provided between the spring fixing member 17 and the knob shaft holding member 16 and that constantly pushes the knob shaft 4 toward the platen knob 4A side.
The knob shaft 4 includes a pin 4a that is provided at the end of the knob shaft 4 and that prevents the knob shaft 4 from jumping out of the case body 3.

Next, the operation of the above embodiment will be described.

First, in the state shown by the solid line in FIG.
When A is rotated, a pair of switching gears 12Aa and 12Ab for setting a small speed ratio are meshed with each other, so that the rotation of the platen shaft 2 is in a fine line feed state as in the case of the conventional example described above, and the platen 1 is rotated. The upper paper is fed by a small line feed.

Next, when the platen knob 4A is pressed in the direction of arrow A, the coil spring 18 is compressed, and at the same time, the switching gears 12Aa and 12Ab having a small speed ratio are disengaged to set a large speed ratio. 12B
b is meshed. When the platen knob 4A is rotated in this state, the rotation of the platen shaft 2 is expanded by the switching gears 12Ba and 12Bb, and the shift amount of the paper on the platen 1 is increased. That is, it is possible to easily rotate many platen knobs 4A to easily feed many sheets.

When the pressing force in the A direction on the platen knob 4A is released, the coil spring 18 of the original position returning mechanism 15 immediately acts to move the knob shaft 4 to the right in FIG. As a result, the state shown by the solid line in FIG. 1 is restored again, and the switching gears 12Aa, 12Ab having a small speed ratio are provided.
Are meshed with each other to enter the minute shift state.

[0025]

As described above, according to the present invention, it is possible to greatly and quickly feed the sheet on the platen by a continuous operation with one touch, which is an unprecedented excellent sheet manual feeding device. can do.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a partially omitted perspective view showing an example in which the embodiment of FIG. 1 is installed in a dot serial printer.

FIG. 3 is a configuration diagram showing a conventional example.

FIG. 4 is a partially omitted perspective view showing a case where the conventional example of FIG. 3 is installed in a dot serial printer.

FIG. 5 is a partial perspective view showing an example of a dot serial printer with some parts omitted.

[Explanation of symbols]

 1 Platen 2 Platen Shaft 4 Knob Shaft 4A Platen Knob 4a Pin 11 Rotational Force Transmission Means 12 Switching Gear Mechanism 12A, 12B Switching Gear Mechanism 15 Home Position Return Mechanism 16 Knob Shaft Holding Member 17 Spring Fixing Member

Claims (3)

[Claims] 1. A knob shaft mounted parallel to a platen shaft and rotatably held by a case body, a torque transmitting means for transmitting a torque of the knob shaft to the platen shaft, and an outer end of the knob shaft. A platen knob attached to a section, and a sheet manual feeder having a structure in which the platen shaft is manually rotated from the outside by rotating the platen knob, wherein the rotational force transmitting means is the platen knob from the outside to the knob shaft. A switching gear mechanism that variably sets the speed ratio from a small speed ratio to a large speed ratio by pressing it along, and an original position return mechanism that returns the gear meshing state of the switching gear mechanism to the state before the switching of the switching gear mechanism. The paper manual feeder characterized by the above. 2. The switching gear mechanism is configured to include a pair of switching gear mechanism parts for setting a small speed ratio and another pair of switching gear mechanism parts for setting a large speed ratio. The sheet manual feeder according to claim 1. 3. A knob shaft holding member, which is mounted on the case main body, holds the knob shaft rotatably and reciprocally along the axis thereof.
A spring fixing member fixedly mounted on the knob shaft;
A coil spring that is provided between the spring fixing member and the knob shaft holding member and that constantly pushes the knob shaft toward the platen knob, and the knob shaft that is provided at the end of the knob shaft projects from the case body. The sheet manual feeding device according to claim 1 or 2, wherein the sheet manual feeding device is configured by a pin for preventing the occurrence of the above.