KR100423464B1 - Paper width adjusting apparatus of paper feeding cassette for printer - Google Patents

Abstract

The paper sorting apparatus of the paper feed cassette for a printer according to the present invention comprises: a base plate having first and second guide rails disposed on a bottom plate of a paper cassette on which a plurality of sheets are loaded and arranged in parallel at regular intervals; And a paper alignment guide slidably installed in the width direction of the paper along the first and second guide rails of the base plate to push and align the side of the paper, wherein the paper alignment guide is in contact with the rear end of the paper side. A body having a paper alignment reference surface for pushing the paper, and an elastic pressing unit extending from the body and contacting the tip of the paper side to press the tip of the paper side when the paper alignment guide for the paper is aligned. It features. In addition, the paper alignment guides have bosses inserted into the first and second guide rails of the base plate at the lower part of the body, respectively, and the bosses have a guide ring in contact with the guide rails to smoothly move the paper alignment guides. These are each installed. According to this, since the sheet alignment guide pushes and aligns the side of the paper as a whole, the meandering or skew feeding of the paper can be suppressed, and the operation of the paper alignment guide can be smoothly performed for convenience in use.

Description

Paper width adjusting apparatus of paper feeding cassette for printer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sorting apparatus of a paper feed cassette for a printer, which is provided in a paper feed cassette of a printing machine and aligns the paper loaded on the paper feed cassette.

In general, a printing machine such as a copy machine or a printer includes a paper feed cassette for storing and storing a plurality of print sheets, and the paper feed cassette is usually provided with a paper sorting device for aligning a plurality of sheets of paper loaded therein. .

One example of a paper feed cassette for a general printer as described above is shown in FIG. In the drawing, reference numeral 100 denotes a cassette body, and the main body 100 has a receiving space 200 for loading a plurality of sheets of paper. The paper sorting device 300 is configured in the storage space 200 to closely align the side of the paper loaded in the storage space 200 with the sidewall of the cassette body so that the paper is constantly aligned.

As shown in FIG. 2, the paper sorting device 300 includes a base plate having first and second guide rails 311 and 312 disposed on a bottom plate of the paper feed cassette and formed in parallel at a predetermined interval ( 310 and a sheet alignment guide 320 installed to slide along the first and second guide rails 311 and 312 of the base plate 310.

One end of the paper alignment guide 320 is provided with a handle portion 321 for a user operation, the other end of the coupling protrusion 322 and the guide protrusion 323 at a predetermined interval, that is, the first of the base plate 310 And the same width as the width of the second guide rails 311 and 312. The coupling protrusion 322 and the guide protrusion 323 are respectively inserted into the first and second guide rails 311 and 312 of the base plate 310 to guide the movement of the paper alignment guide 320.

In addition, a guide support member 330 having a pair of contact pieces in elastic contact with the bottom surface of the base plate 310 is provided below the base plate 310. A coupling groove 331 is formed in the guide support member 330, and a coupling protrusion 322 of the paper alignment guide 320 is provided in the coupling groove 331 in the first guide rail 311 of the base plate 310. Combined through). Accordingly, when the paper alignment guide 320 is moved, the guide support member 330 is also moved together. At this time, a pair of contact pieces of the guide support member 330 are elastic on the bottom surface of the base plate 310. Since it is moved in the contacted state, the paper alignment guide 320 is not moved without the user's manipulation in the state where the position of the paper alignment guide 320 is moved.

A paper sorting method using a paper sorting device of a paper cassette for a general printer configured as described above is as follows. After stacking a plurality of sheets of paper in the paper feed cassette, the sheet sorting guide 320 is operated so that the sheet sorting guide 320 pushes the side of the sheet. Then, the paper is aligned neatly while the paper is totally pushed laterally by the paper alignment guide 320.

However, the conventional paper sorting device as described above, the paper sorting guide 320 for pushing and aligning the side of the paper loaded in the paper feed cassette, partially push the side of the paper, for example, push the rear end of the paper or add it to this part.推) Because the force is to work intensively, there is a problem that the paper curling occurs or the skew feeding phenomenon occurs because the paper is not uniformly aligned as a whole.

In addition, in the conventional paper sorting device, since the paper sorting guide 320 slides in a state of being in surface contact with the base plate 310, the paper sorting guide 320 has a large frictional resistance when the paper sorting guide 320 is moved, and both ends of the paper sorting guide 320. That is, there is also a problem in that the sliding movement of the coupling portions of the first and second guide rails 311 and 312 is uneven, so that it is difficult for the user to operate the paper alignment guide.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a paper sorting device for a paper cassette for a printing press capable of stably aligning paper by pushing the entire side of the paper loaded in the paper cassette with a constant force. There is this.

Another object of the present invention is to provide a paper sorting apparatus for a paper feed cassette for a printer, which is easy to operate with a paper sorting guide.

1 is a perspective view showing a paper feed cassette of a printer to which a conventional paper sorter is applied;

FIG. 2 is an exploded perspective view illustrating the paper sorting apparatus of the paper feeding cassette of FIG. 1; FIG.

3 is an exploded perspective view showing a paper sorting apparatus of a paper feed cassette for a printer according to an embodiment of the present invention;

4 is an assembled rear view of FIG. 3;

5 is a cross-sectional view taken along the line A-A of FIG.

6A and 6B are plan views showing the action of the paper sorting apparatus of the paper feed cassette for a printer according to an embodiment of the present invention.

<Explanation of Signs of Major Parts of Drawings>

100; paper cassette 400; paper sorter

410; base plate 411,412; first and second guide rails

Paper Alignment Guide 421 Paper Alignment Guide Body

422; grip part 423; elastic pressing part

426a, 426b; first and second boss portions 428a, 428b; first and second guide rings

430; guide support member 432; elastic contact piece

In order to achieve the above object, the paper sorting apparatus of the paper feed cassette for a printer according to the present invention includes a first guide rail and a second guide rail disposed on a bottom plate of a paper cassette on which a plurality of sheets are stacked and arranged in parallel at regular intervals. Equipped base plate; And a paper alignment guide slidably installed along the first and second guide rails of the base plate in a paper width direction to push and align the side of the paper, wherein the paper alignment guide includes a rear end portion of the side of the paper. A body having a paper alignment reference surface for pushing the paper in contact with the paper, and an elastic pressing portion extending from the body and contacting the leading end of the paper side to press the leading end of the paper side when the paper alignment guide for the paper alignment is moved. Characterized in that.

The elastic pressing portion has a structure in which its tip protrudes from the sheet alignment reference surface of the body, and has a space portion and a bent portion so that a small load is always constantly applied to the sheet.

The paper alignment guides have bosses inserted into the first and second guide rails of the base plate, respectively, in the lower part of the body, and the bosses which are in rolling contact with the guide rails to facilitate the movement of the paper alignment guides. Rings are installed respectively.

According to a preferred embodiment of the present invention, the paper sorting device of the paper feed cassette for a printing press includes a guide supporting member which is injection-molded with plastic for maintaining the paper adjusting position of the paper sorting guide so as to contact the bottom surface of the base plate. It is characterized in that the fastening is installed in any one of the screws.

The guide support member has a second fastening groove for fastening the screw to one side of the body, and a pair of elastic contact pieces for elastically contacting the bottom surface of the base plate on the other side thereof, the center of which is approximately the center of the body. The second fastening groove is formed is inserted into the guide projection formed in the paper alignment guide is configured.

The pressing force of the elastic contact piece of the guide support member is set larger than the pressing force of the elastic pressing portion of the sheet alignment guide.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will now be described based on the accompanying drawings.

3 is an exploded perspective view illustrating a paper sorting apparatus of a paper cassette for a printing press according to an embodiment of the present invention, FIG. 4 is an assembled rear view of FIG. 3, FIG. 5 is a sectional view taken along line AA of FIG. 3, and 6A and 6B are plan views showing the action of the paper sorting apparatus of the paper feed cassette for a printer according to an embodiment of the present invention.

As shown in Figures 3 to 5, the paper sorting device of the paper feed cassette for a printer according to an embodiment of the present invention, the first and second guide rails are installed on the bottom plate of the paper cassette and formed in parallel at a predetermined interval. A base plate 410 having 411 and 412, and a sheet alignment guide 420 installed to slide along the first and second guide rails 411 and 412 of the base plate 410. .

The paper alignment guide 420 has a body 421 having a paper alignment reference surface that pushes the paper in contact with an approximately rear end of the paper side, and extends from the body 421 and is in contact with an approximately front end of the paper side. It comprises an elastic pressing unit 423 for pressing the leading end portion of the side of the paper when the paper alignment guide for the paper alignment. In this case, the elastic pressing unit 423 has a structure in which the tip thereof protrudes from the paper alignment reference plane of the body 421, and the space 424 and the bent part to always constantly apply a small load on the paper to the paper. It is preferred to have 425.

In addition, one side of the upper surface of the paper alignment guide 420 is formed with a handle portion 422 for the user operation, the lower portion of the first and second guide rails (411, 412) are inserted into the first and second Boss portions 426a and 426b are formed. First and second guide rings which rotate along the first and second guide rails 411 and 412 on the outer circumference of the bosses 426a and 426b to allow the paper alignment guide 420 to move in a cloud. 428a and 428b are respectively installed. Here, the two guide rings 428a and 428b and the bosses 426a and 426b of the paper alignment guide 420 may be configured such that the two members can move while rolling in contact with each other, as shown in the example. Although not shown, gears are formed on one surface of the two guide rails 411 and 412 and the outer circumferential surfaces of the two guide rings 428a and 428b, respectively, so that the guide rings 428a and 428b are guide rails. 411 and 412 may be configured to move with a foreign body structure engaged with.

In addition, the paper sorting apparatus of the paper feed cassette for a printer according to an embodiment of the present invention includes a guide support member 430 injection-molded with plastic for maintaining the paper adjusting position of the paper sorting guide 410. The guide support member 430 is fastened to any one of the bosses so as to contact the bottom surface of the base plate 410 at the lower side of the base plate 410.

The guide support member 430 includes a body 431 having first and second fastening grooves 431a and 431b and an elastic contact piece 432 extending to one side of the body 431. A guide protrusion 427 protruding from the lower surface of the paper alignment guide 420 is inserted into the first fastening groove 431a of the body 421. The guide support member 430 is installed in the first boss portion 426a of the paper alignment guide 420 by a fastening means 433 such as a screw or a key fastened through the second fastening groove 431b. Thus, the guide support member 430 and the paper alignment guide 420 are fixed without flow.

On the other hand, the elastic contact piece 432 of the guide support member 430 by pressing the bottom surface of the base plate 410 to generate a friction force on the contact surface between the two members (410, 430) the guide support member ( 430 does not slip without the user's pressing force. The front end of the elastic contact piece 432 is preferably formed in a round shape with a gentle inclination to reduce the frictional resistance with the outer surface of the base plate 410 during the sliding movement. In addition, the friction force generated when the elastic contact piece 432 presses the base plate 410 is pushed by the paper alignment guide 420 to the opposite side of the pressing direction by the pressing force of the elastic pressing unit 423. In order to prevent that, it is preferable that the elastic pressing unit 423 is set larger than the paper pressing force.

As described above, in the paper sorting apparatus of the paper feed cassette for a printing press according to the present invention, the sheet aligning guide 420 is provided with an elastic pressing unit 423, and the entire side surface of the paper at the time of aligning the paper loaded in the paper cassette. Since the pressure is applied, it is possible to prevent the paper from twisting in the width direction even when an external force by the pick-up apparatus or the like is applied. In addition, since the paper sorting guide 420 moves in a cloud along the guide rails 411 and 412 by guide rings 428a and 428b, the paper alignment guide 420 moves smoothly and is easy for the user to operate.

6A and 6B, the operation of the paper sorting apparatus according to an embodiment of the present invention will be described.

As shown in Fig. 6A, in a state where a plurality of sheets of paper P are loaded in the paper cassette, the sheet alignment guide 420 is moved in the direction indicated by arrow A so that the sheet alignment guide 420 pushes the side of the sheet of paper. At this time, the rear end of the side of the paper (P) is pushed by the body 421 of the paper alignment guide 420 and the front end of the side of the paper (P) to the elastic pressing portion 423 of the paper alignment guide 420 It is pressed against the side wall of the paper feed cassette while being pushed. That is, since the paper alignment guide pushes the entire surface of the side surface of the paper, the paper P is aligned without distortion, as shown in FIG. 6B. In addition, since the elastic pressing portion 423 of the paper alignment guide 420 continuously elastically deforms the front end portion of the paper in the alignment direction while being elastically deformed, the paper P is twisted even when an external force is applied by a paper feeder or the like. It is possible to maintain the aligned state without this, thereby suppressing meandering or skewing of the paper P during feeding.

As described above, the paper sorting apparatus of the paper feed cassette for a printing press according to the present invention is formed by further extending an elastic pressing portion capable of pressing the paper to one end of the paper sorting guide to push the paper side as a whole to align it. It is possible to suppress meandering or skew feeding due to the distortion of the paper, which has been a problem in the above, and thus, it is possible to improve the reliability of the printing press.

In addition, since the paper sorting device of the paper feed cassette for a printing press according to the present invention is assembled so that the paper sorting guide moves in the guide rail under the interposition of the guide ring, the paper sorting guide can be moved smoothly without being twisted. There is an effect that it is easy to operate.

While the invention has been shown and described with respect to preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes, modifications, and equivalents should be considered to be within the scope of the present invention.

Claims (6)

A base plate provided on a bottom plate of a paper cassette on which a plurality of sheets of paper are stacked and having first and second guide rails arranged in parallel at regular intervals; And In the paper sorting apparatus of the paper feed cassette for a printing machine comprising: a paper alignment guide which is slidably installed in the width direction of the paper along the first and second guide rails of the base plate to push and align the side of the paper. The paper alignment guide has a body having a paper alignment reference plane which pushes the paper in contact with an approximately rear end of the paper side, and extends from the body and contacts the approximately front end of the paper side to move the paper alignment guide for paper alignment. A paper sorting device for a paper feed cassette for a printer, characterized in that it comprises an elastic pressing unit for pressing the leading end of the paper side. The method of claim 1, The elastic pressurizing portion has a structure in which its tip protrudes from the paper alignment reference surface of the body, and has a space portion and a bent portion so that a small load is constantly applied to the paper. . The method of claim 1, The paper alignment guides have bosses inserted into the first and second guide rails of the base plate, respectively, in the lower part of the body, and the bosses which are in rolling contact with the guide rails to facilitate the movement of the paper alignment guides. A paper sorting device for a paper cassette for a printing press, characterized in that rings are provided respectively. The method of claim 3, wherein The paper alignment device of the paper feed cassette for a printer, characterized in that the guide support member injection-molded with plastic for maintaining the paper adjustment position of the paper alignment guide is screwed to any one of the boss so as to contact the bottom surface of the base plate. . The method of claim 4, wherein The guide support member has a second fastening groove for fastening the screw to one side of the body, and a pair of elastic contact pieces for elastically contacting the bottom surface of the base plate on the other side thereof, the center of which is approximately the center of the body. And a first fastening groove into which the guide protrusion formed in the paper alignment guide is inserted. The method of claim 5, wherein The pressing force of the elastic contact piece of the guide supporting member is set larger than the pressing force of the elastic pressing portion of the sheet alignment guide.