JPS63246264A - Paper feeder - Google Patents

Abstract

PURPOSE:To make it possible to cope with both a slip paper and a continuous form paper by use of a simple construction, by providing an arm mechanism which is turned so that a rotary support shaft for supporting pinch rollers in a body therewith can be moved toward and away from a platen, and providing a rotating force-transmitting mechanism and a clutch mechanism in connection between a rotation driving shaft provided for the platen and the rotary support shaft. CONSTITUTION:When a switching operation member 11B of a clutch mechanism 11 is drawn out in the direction of an arrow C, a driven gear 10B and a driving gear 10A are disengaged from, each other, and an arm mechanism 4 is turned in the direction of an arrow A. Then, a rotating force is not transmitted from the gear 10A to the gear 10B, and pinch rollers 2, 2 are driven by the surface of a platen 1 through a slip paper 20 disposed therebetween, so that the slip paper 20 is fed by rotating the platen. When the switching operation member 11B is pressed in the direction of an arrow D, the arm mechanism 4 is slightly turned in the direction of an arrow B, whereby the pinch rollers 2, 2 are separated from the platen 1. Therefore, sprockets 5, 5 are rotated through the functions of a rotating force-transmitting mechanism 10 and the clutch mechanism 11 simultaneously with rotation of the platen 1, whereby a continuous form paper is fed out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device, and more particularly to a paper feeding device equipped with a pinch roller that contacts a platen.

[Conventional technology]

The paper feed device of a printer has a different configuration depending on whether the paper is a single sheet or continuous paper.

A paper feeding device for cut sheets includes one or more pinch rollers that come into contact with a platen and are rotated by being biased by the platen, a rotating shaft that integrally supports the pinch rollers, and this rotating shaft. and an arm mechanism that allows the pinch roller to rotate freely up and down relative to the platen.

On the other hand, in the case of continuous paper, the paper feed device includes a sprocket wheel that engages paper feed holes provided at equal intervals on both sides of the paper;
It is equipped with a sprocket drive mechanism to drive this sprocket car.

Each of these paper feeding devices is fully functional as a dedicated machine depending on the purpose.

[Problem that the invention seeks to solve]

With the recent diversification of office processes, the need to print out the same information on multiple different types of paper (continuous paper and cut paper) is rapidly increasing.

However, installing a plurality of printers depending on the type of paper requires an unnecessary economic investment and also has the drawback of poor efficiency in office processing. .

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feed device for a printer that can handle both cut-sheet paper and continuous paper with a simple configuration and improves the disadvantages of the conventional example. .

[Means for solving problems]

In the present invention, there is provided a pinch roller or two or more pinch rollers that are rotated by being biased by the platen, a rotating shaft that integrally supports the pinch roller, and a rotating shaft that can be freely rotated with respect to the platen. It is equipped with an arm mechanism that allows it to move. A sprocket for holding continuous paper is fixed to both ends of the rotation support shaft, and a concave groove for storing the sprocket is formed around the part of the platen corresponding to the sprocket, and the rotation drive shaft installed on the platen is A configuration is adopted in which a rotational force transmission mechanism and a clutch mechanism are connected and equipped between the rotary support shaft and the rotary support shaft.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

The embodiment shown in FIG. 1 includes two pinch rollers 2.2 that rotate in contact with the platen 1, a rotating support shaft 3 that integrally supports each pinch roller, and a rotating support shaft 3 that supports the platen 1. The arm mechanism 4 is provided with an arm mechanism 4 that can freely rotate up and down as shown by arrows A and B. This constitutes a ticket feeding means.

Sprockets 5.5 for holding continuous paper are fixedly attached to both ends of the rotating support shaft 3, respectively. Grooves IA and LA for housing sprockets are formed around portions of the platen 1 corresponding to the respective sprockets 5.

A rotational force transmission mechanism 10 and a clutch mechanism 1 are provided between the rotational drive shaft IB installed on the platen 1 and the rotational support shaft 3 for the sprocket 5.5 and the pinch roller 2.2 described above.
1 is equipped. This constitutes a continuous paper feeding means and a switching means.

The rotational force transmission mechanism 10 includes a rotational drive shaft IB for the platen l.
It is composed of a driving gear IOA mounted on the sprocket 5, and a driven gear IOB mounted on the rotation support shaft 3 on the side of the sprockets 5, 5. As a result, the rotational force of the platen 1 is directly transmitted to the sprocket 5.5. In this case, each gear ratio of the driving gear IOA and the driven gear IOB is adjusted in advance so that the rotational circumferential speed of the sprockets 5, 5 and the rotational circumferential speed of the platen 1 are approximately the same.

The clutch mechanism 11 reciprocates the driven gear IOB described above along the rotational support shaft 3, thereby connecting the driving gear IOB to the driving gear IOB.
It engages with and disengages from A, and IIB indicates a switching operation member. This switching operation member 11B is formed of a cylindrical member with a knob portion, and is fitted into the end of the rotational support shaft 3, and by pulling it out in the direction of arrow C, the driven gear IOB is connected to the rotational support shaft. 3 in the direction of arrow C to disengage the driven gear IOB from the meshing state with the driving gear IOA.

Next, the overall operation of the above embodiment will be explained.

Figures 1 and 2 show the case where a cut sheet is sent out.

In the case of FIG. 1, the switching operation member 11B of the clutch mechanism 11 is pulled out all at once in the direction of arrow C, and thereby the driven gear IOB and the driving gear IOA are disengaged. . For this reason, the arm mechanism 4
is in a state where it is fully rotated in the direction of arrow A in FIG. In this state, first pinch roller 2,
2 is brought into contact with the platen 1 via a cut sheet 20.

Further, the sprockets 5, 5 are connected to the concave groove LA of the platen 1,
They are respectively arranged within the IA. Therefore, since no rotational force is transmitted from the driving gear IOA to the driven gear 10B, the pinch rollers 2, 2 are driven from the surface of the platen 1 via the cut paper 20, and therefore the cut paper 20 While being held down by the pinch rollers 2, 2, the platen is rotated so that it is smoothly sent out in a predetermined direction.

FIGS. 3 and 4 show the case where continuous paper is sent out.

In the case of FIG. 3, the switching operation member 11B of the clutch mechanism 11 is pushed in all the way in the direction of the arrow (arrow C is the opposite direction), so that the driven gear IOB
and the driving gear IOA are in mesh with each other. Therefore, the chi 11 mechanism 4 is in a state where it has rotated somewhat in the direction of arrow B in FIG. 4 (compared to FIG. 2). In this state, the pinch rollers 2, 2 are first placed on the platen 1.
It is in a state of being separated from. On the other hand, the sprockets 5, 5 are set at positions where they can lock the continuous paper 21 placed on the platen 1.

Therefore, as the platen 1 rotates, the sprockets 5.5 and 5.
rotates, so that the continuous paper 21 is smoothly fed out in a predetermined direction as the platen 1 rotates.

〔Effect of the invention〕

As described above, according to the present invention, although it is a single device, it is not only possible to smoothly feed cut sheets as in the past, but also it is possible to feed out the rotational force even when continuous paper is used. It is possible to provide a paper feeding device with unprecedented multi-functions that allows continuous paper to be smoothly fed by the actions of the transmission mechanism 10 and the clutch mechanism 11.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIGS. 2 to 4 are explanatory views of the operation of FIG. 1. 1...Platen, IA...Concave groove, I
B...Rotation drive shaft, 2...Pinch roller, 3...Rotation support shaft, 4...Arm mechanism, 5...Sprocket , 10... Rotational force transmission mechanism, 11... Clutch mechanism. Patent applicant NEC Corporation Figure 2 Figure 3, a Figure 4

Claims (1)

[Claims] (1) one or more pinch rollers that are urged by the platen to rotate, a rotating support shaft that integrally supports the pinch rollers, and this rotating support shaft that can be freely rotated with respect to the platen; In a paper feeding device for a printer equipped with a movable arm mechanism, a sprocket for engaging continuous paper is fixed to both ends of the rotating shaft, and the sprocket is stored around the platen in a portion corresponding to the sprocket. What is claimed is: 1. A paper feeding device, characterized in that a concave groove portion is formed for use in the platen, and a rotational force transmission mechanism and a clutch mechanism are coupled and equipped between a rotational drive shaft installed on the platen and the rotational support shaft.