KR20010084222A - Paper cassette for printing device - Google Patents

Abstract

PURPOSE: A sheet cassette for a printer is provided to conveniently check remaining amount of sheet in the sheet cassette without withdrawing the cassette from the printer. CONSTITUTION: A perspective tube(231) is installed on a front wall of a sheet cassette(200). Then, a remaining amount displaying instrument is arranged for conveniently checking remaining amount of sheets in the sheet cassette through the perspective tube. Herein, the remaining amount displaying instrument is formed by a tube(234) connected to a lower end of the perspective tube; a wire(232) installed in the tube for being transferred; and a compressing spring(235) for elastically biasing a protruded end of the wire toward a contact direction of a rear surface of a knock-up plate(220). In case of the cassette full of the sheets, the knock-up plate is lowered by weight of the sheets to push the wire. An end of the wire is inserted to the tube for elevating the other end in the perspective tube. Thus, a user conveniently recognizes amount of sheets in the cassette. In case of empty state of the cassette, the knock-up plate is elevated for elevating the end of the wire. Thus, the other end of the wire in the perspective tube is lowered. Therefore, the user conveniently recognizes amount of the sheets in the cassette.

Description

Paper cassette for printing device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cassette for accommodating paper and coupled to a printer, and more particularly, to a paper cassette of a printing machine in which the remaining amount of paper can be visually checked from the outside.

For example, in the printer 10 such as a printer or a copying machine, as shown in Fig. 1, a paper cassette 20 containing a plurality of sheets is detachably coupled to supply paper. In this cassette 20, a knock-up plate 21 on which a sheet is seated is rotatably provided, and a compression spring 22 provided below is elastically lifting the knock-up plate 21. Therefore, when the cassette 20 is coupled to the printing press 10, the uppermost sheet of paper stored therein is in contact with the paper feed pickup roller 11 of the printing press 10. When the pickup roller 11 rotates in this state, the received paper is fed into the printer 10 one by one.

By the way, in the conventional paper cassette having such a structure, even if the stored paper is gradually consumed due to the printing operation, the paper cassette 20 knows how much paper remains in it unless the paper cassette 20 is removed from the printer 10 and checked. I can't. Therefore, the job is frequently interrupted due to lack of paper during the printing process, in order to check the remaining amount of paper before the print job in order to prevent this, the user has to take out the paper cassette 20 one by one.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a paper cassette of a printing press which allows the user to visually check the remaining amount of paper stored in the cassette without removing the cassette from the printer main body.

1 is a view showing a conventional paper cassette,

2 shows a paper cassette according to a first embodiment of the present invention;

3 is a cross-sectional view of FIG.

4 shows a paper cassette according to a second embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100 ... printer body 200 ... cassette

231,331 ... Hole tube 232,332 ... Wire

233 Indicator bar 333 Colored liquid

234,334 Tube 235,335 Compression springs

336 ... stopper member

The paper cassette of the present invention for achieving the above object is a knock-up, the cassette main body that accommodates the paper and detachably coupled to the printing press, and the inside of the main body is rotatably installed, the seated paper is seated thereon A paper cassette of a printing machine comprising a plate and a first elastic member for resiliently lifting the knock-up plate toward a paper feed pickup roller provided in the printing machine, wherein the main body includes: a see-through tube that can be seen from the outside; -The position visible through the see-through tube is variable by moving in conjunction with the rotation of the up-plate, from which the remaining amount of paper display means for determining the remaining amount of paper seated on the knock-up plate is provided .

Here, the paper remaining amount display means, a tube provided to connect the lower side of the see-through tube and the knock-up plate, and is installed to be movable in the tube, one end thereof to be in contact with the rear surface of the knock-up plate. It is preferable that the other end includes a wire protruding into the see-through tube so as to be seen from the outside, and the second elastic member for providing an elastic force in a direction in which one end of the wire is in contact with the back surface of the knock-up plate Do.

Or the paper remaining amount display means is installed so as to connect the sight tube and the knock-up plate below, and is movably installed in the tube, and one end thereof is in contact with the rear surface of the knock-up plate. And a plug member coupled to the other end of the wire to move while blocking the inner conduit of the tube, and filled so as to flow between the see-through tube and the plug member in the tube, and to move the plug member. It may be configured to include a colored liquid that is variable along the water level through the see-through tube while flowing along.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 show a paper cassette according to a first embodiment of the present invention.

As shown, a knock-up plate 210 is rotatably installed inside the paper cassette 200, and the knock-up plate 210 is a compression spring 220 (hereinafter referred to as a first elastic member). The elastic force in the direction rotated toward the pickup roller (110) by. Therefore, the paper seated on the knock-up plate 210 is always in close contact with the pickup roller 110 by the first elastic member 220 when the paper cassette 200 is coupled to the main body. As the paper is gradually consumed, the rotational position of the knock-up plate 210 is gradually raised toward the pickup roller 110.

On the other hand, the front wall of the paper cassette 200 is installed in the see-through tube 231 so that it can be peeked from the outside, through the see-through tube 231 the remaining amount of paper remaining in the cassette 200 to the naked eye Paper remaining amount display means for displaying in a predetermined manner so that it can be confirmed.

The paper remaining amount display means includes a tube 234 connected to the lower end of the see-through tube 231 and arranged to be bent in a “U” shape, a wire 232 movably installed in the tube 234, and A compression spring 235 (hereinafter referred to as a second elastic member) is provided to elastically bias the protruding end of the wire 232 in a direction in contact with the back side of the knock-up plate 220. The other end of the wire 232 protrudes into the see-through tube 231 so as to be visible from the outside.

In the above configuration, since the knock-up plate 220 is lowered by the paper weight and presses the wire 232 when the paper is filled in the cassette 200, one end of the wire 232 is connected to the tube 234. ), And the other end is raised in the see-through tube 231. If you look at it from the outside, the other end of the wire 232 can be seen that the high position is a lot of paper can be determined. On the contrary, when a lot of paper is consumed and the knock-up plate 220 is raised, one end of the wire 232 is also raised by the restoring force on the second elastic member 235, thereby protruding in the see-through tube 231. The other end is lowered. Therefore, it can be determined that the paper is almost exhausted by looking at this. Reference numeral 233 denotes an indicator bar attached to the other end of the wire 232 to make visual confirmation easier. Even if it is not attached thereto, there will be no difficulty in determining the remaining amount of paper. Therefore, by adopting such a configuration, it is possible to determine the remaining amount of paper without removing the cassette 200 from the printing press.

Next, Fig. 4 shows a second embodiment of the present invention in which the paper remaining amount display means is configured differently from the above.

In this embodiment, a stopper member 336 is provided at the other end of the wire 332 to move in a state of blocking the conduit of the tube 334, and a colored liquid is provided between the stopper member 336 and the see-through tube 331. (333) was charged. Reference numeral 335 denotes a compression spring that provides an elastic force so that one end of the wire 332 is in contact with the back side of the knock-up plate 210, and is the same as the second elastic member of the first embodiment described above. Therefore, when the wire 332 moves according to the rotation of the knock-up plate 210, the stopper member 336 moves together to push the colored liquid 333 into the see-through tube 331 or flow to the tube 334 on the contrary. To come out. That is, when the paper is filled in the cassette 200 and the knock-up plate 210 descends, the stopper member 336 of the wire 332 moves in the direction to push the colored liquid 333 into the see-through tube 331. On the contrary, since the wire 332 is restored by the second elastic member 335, the plug member 336 retreats so that the colored liquid 333 flows toward the tube 334. Therefore, the water level of the colored liquid 333 in the see-through tube 331 can always check how much paper remains.

On the other hand, in the above-described first and second embodiments, the tubes 234 and 334 are formed in a "U" shape, which is a sheet of paper visible to the viewing tubes 231 and 331 when the human emotion is full. This is because the remaining amount display means is also used to increase and gradually descend as the paper is consumed. If the paper remaining amount display means moves in the same direction as the knock-up plate 210, it is easy to be confused because it goes down when the paper is full and goes up when it is empty.

As described above, according to the paper feeding device of the printer, even if the cassette is coupled to the printer, the remaining amount of paper remaining can be easily checked to prepare for the print job.

It is to be understood that the invention is not limited to that described above and illustrated in the drawings, and that more modifications and variations are possible within the scope of the following claims.

Claims (3)

A cassette body for storing paper and detachably coupled to a printing press, a knock-up plate rotatably installed inside the body, and having the received paper seated thereon; and the knock-up plate installed in the printing press. A paper cassette of a printing press comprising a first elastic member elastically lifted to a paper pick-up roller side, In the main body, A viewing tube that can be seen from the outside, The position visible through the see-through tube is variable by moving in conjunction with the rotation of the knock-up plate, from which the remaining amount of paper display means is provided to determine the remaining amount of paper seated on the knock-up plate. Paper cassette of printing press. The method of claim 1, The paper remaining amount display means, A tube installed to connect the sight tube and the knock-up plate downward; A wire movably installed in the tube, one end of which protrudes downward to be in contact with the rear surface of the knock-up plate, and the other end of which is protruded into the see-through tube so as to be visible from the outside; And a second elastic member for providing an elastic force in a direction in which one end of the wire is in contact with the back surface of the knock-up plate. The method of claim 1, The paper remaining amount display means, A tube installed to connect the sight tube and the knock-up plate downward; A wire movably installed in the tube, one end of which is protruded downward to be in contact with the rear surface of the knock-up plate, A plug member coupled to the other end of the wire to move while blocking an inner conduit of the tube; A paper cassette of a printing machine, characterized in that it comprises a colored liquid which is filled so as to be flowable between the see-through tube and the stopper member in the tube, and which varies in water level as seen through the see-through tube while flowing in accordance with the movement of the stopper member.