KR950001162Y1 - Sheet-size sensing device in a universal cassette - Google Patents

Abstract

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Description

Paper Size Detection Device of Universal Cassette

1 is a configuration diagram schematically showing a paper size detection device of a conventional cassette.

(A) and (b) of FIG. 2 are schematic diagrams of a conventional paper size detection sensor.

Figure 3 is a perspective view showing an embodiment configuration of a paper size detection device according to the present invention.

(A) and (b) of FIG. 4 are main components for explaining the working state of the present invention, (a) is a plan view, and (b) is a front view.

* Explanation of symbols for main parts of the drawings

1, 11: cassette 2, 12: side guide

3, 13: rear guide 4, 14: bottom plate

5, 15 detection part 6: detection sensor

7: rack 8: pinion

9: detection piece hole 10: wire

10a: linear moving part 10b: deflection moving part

11a: rear guide fixing groove 14a: incision

16a: first pulley 16b: second pulley

17: direction change pulley 18: rotation cam

19: moving piece 19a: connecting piece

20: spring 21: guide hole

22: guide piece 23: spring fixing piece

The present invention relates to a paper size detection device for a cassette used for feeding paper in office equipment such as a copy machine, a laser printer, and a plain paper fax machine. In particular, a universal cassette capable of detecting various sizes of paper loaded as a simple structure. It relates to a paper size detection device.

In general, paper used for office equipment is classified into various standards according to its size, and in actual use, the paper can be used by switching its structure as the paper is loaded in the cassette in the longitudinal direction or the width direction.

Therefore, it is very economical because a separate cassette is required to use each paper, and as a way to compensate for this, in recent years, the side guides and the rear guides can be moved according to the paper size to accommodate various paper sizes. A universal cassette configured to be present has been proposed and used.

However, when multiple sizes of paper are set in one cassette, the paper size detecting device for recognizing the size of the set paper should also be displaced according to the positions of the side guides and the rear guides.

To this end, as in the case of the front feed method configured to feed the paper from the front of the office equipment is configured to be linked together by connecting the pressing plate to the rear guide, the main body is provided with a plurality of sensors when the cassette is mounted the pressing plate By configuring to press a specific sensor, a method of recognizing the paper size according to the signal of the pressed sensor is widely used.

In the case of the side feed method for feeding paper from the side of the office equipment, since it is very difficult to displace the paper size detection device according to the change in the paper size, as shown in Korean Patent Publication No. 91-10250, A method of detecting a paper size by providing a sensor has been proposed, but there is a configuration problem that requires the use of a plurality of expensive sensors and a power supply for the operation of the sensor.

In addition, Utility Model Registration No. 92-28409 by the present applicant has proposed to detect only the change in the longitudinal direction in the fixed state of the paper in order to implement mechanically while minimizing the number of the sensor.

However, the above two methods do not use the existing ones even in the detection sensor for detecting the paper size located in the main body of the office equipment, and there is a problem that a detection sensor having a different configuration must be used.

That is, the conventional side feed type cassette detects the paper size by fixing the detection piece having a specified shape according to the paper size loaded on the cassette tip.

Hereinafter, an embodiment of a conventional paper size detection device will be described in detail with reference to FIGS. 1 and 2.

FIG. 1 is a schematic view showing a paper size detection device of a conventional cassette, and FIGS. 2A and 2B show a conventional paper size detection sensor, respectively.

In the drawings, 1 is a cassette, 2 is a side guide, 3 is a rear guide, 4 is a bottom plate, 5 is a detection piece, and 6 is a detection sensor.

The side guides 2 and the rear guides 3 are fixed at the designated positions according to the size of the paper set in the cassette 1, the corresponding detection piece 5 is fixed at the front end of the cassette 1, and then the paper is set. When attached to the main body of the device, the detection piece 5 is in contact with the detection sensor 6 fixed to the main body to generate a signal to detect the paper size by the arrangement or combination of these signals.

That is, as shown in FIG. 2, the detection sensor 6 includes a light receiving element of a plurality of light emitting elements, or a plurality of pressing pieces, and these are detected by the detection piece 5 of the cassette 1 to be mounted. Part or all of the detection sensor 6 is covered or pressed to generate a specific signal to detect the paper size. However, in order to use the conventional detection sensor 6 as described above, there is a problem that a separate cassette 1 must be used for each paper size.

Therefore, the present invention devised to solve the above problems, to provide a paper size detection device of the universal cassette that can detect a plurality of sizes of paper while using the existing detection sensor mounted on the main body as its purpose I put it.

In order to achieve the above object, the present invention has a side guide and a rear guide which can be moved according to the paper size, so that the paper size detection device of the universal cassette capable of loading various sizes of paper, one side of the rear guide A wire having a linear moving part and a deflecting moving part fixedly connected to the moving part according to the movement thereof; First and second pulleys respectively positioned at a rear end and a front end of the rear guide in a direction in which the rear guide is moved to guide the movement of the linear moving part of the wire; A direction switching pulley for guiding the movement of the deflection moving unit by switching by shifting the moving direction of the wire driven by a predetermined angle while driving by the wire; A rotating cam that receives power from the turning pulley and rotates; A moving piece which is connected to the rotating cam and moved to the left and right according to the rotation of the rotating cam, and a detection piece is formed at one front end thereof; A spring providing a restoring force so that the moving piece is always in close contact with the moving cam; And a detection piece hole formed at a front end of the cassette in a predetermined size to guide the detection piece to move left and right in a protruding state to the outside.

Hereinafter, the configuration of an embodiment of a paper size detecting apparatus according to the present invention will be described in detail with reference to FIGS. 3 and 4.

Figure 3 is a perspective view showing an embodiment configuration of a paper size detection device according to the present invention, Figure 4 is a principal configuration diagram for explaining the working state of the present invention, (a) is a plan view, (b) is a front view. to be.

In the drawing, 9 is a detection piece hole, 10 is a wire 10a is a linear moving part, 10b is a deflection moving part, 11 is a cassette, 11a is a rear guide fixing groove, 12 is a side guide, 13 is a rear guide, 14 is a bottom plate, 14a Is an incision, 15 is an index piece, 16a is a first pulley, 16b is a second pulley, 17 is a turning pulley, 18 is a rotating cam, 19 is a moving piece, 19a is a connecting piece, 20 is a spring, 21 is a guide hole, 22 is a guide piece, 23 is a spring fixing piece, respectively.

As shown in FIG. 3, the cassette 11 to which the present invention is applied has a cutout portion 14a of a predetermined size formed on both sides of the bottom plate 14 fixedly mounted at both sides thereof. Side guides 12 for aligning the width of the paper to be loaded are positioned and moved to the 14a, and the lower end of the side guide 12 is connected to the pinion 8 provided below the bottom plate 14, respectively. When the width of the paper loaded on the side guide 12 is adjusted, both sides are symmetrically moved to face each other according to the driving of the rack 7 and the pinion 8 provided at the bottom of the bottom plate 14. In addition, the rear guide fixing groove 11a formed on the rear guide moving rail of the bottom surface of the cassette 11 is easily moved after the rear guide 13 for adjusting the length of the paper is moved to the corresponding paper specification position. It is formed so as not to.

Now, with reference to Figure 4 (a) and (b) will be described in detail an embodiment configuration of the present invention.

The wire 10 fixedly connected to only one side of the rear guide 13 and moving together is a straight line connected between the first and second pulleys 16a and 16b positioned at the rear end of the rear guide 13 to move. And a deflection moving part 10b which is connected and moved between the moving part 10a and the second pulley 16b and the direction changing pulley 17 positioned at predetermined intervals on one side thereof to change the moving direction. have. In addition, an upper gear of the direction change pulley 17 is connected to a driven gear formed at the bottom of the rotation cam 18. Therefore, the wire 10 is moved in the forward or reverse rotation direction when the front and rear movements for setting the length of the rear guide 13 are rotated by transmitting rotational force to the rotation cam 18 through the direction change pulley 17. To make it possible.

As described above, the rotation cam 18 connected to the direction change pulley 17 rotates by receiving power from the direction change pulley 17, and from the rotation axis to the outer circumference according to the rotation position thereon. A cam of a specific shape having different distances is formed so that the connecting piece 19a can be moved left and right according to its rotational position. Therefore, according to the left and right movement of the moving piece 19, one side of which is connected to the connecting piece 19a which is moved left and right according to the rotation of the rotation cam 18, the detection piece 15 located at the tip is moved and stacked. The size of the device side detection sensor 6 is to be detected.

That is, by adjusting the power transmission ratio of the turning poly 17 and the rotation 18 cam so as to correspond to the moving range of the rear guide 13 and the outer circumference of the rotation cam 18, the rear When the guide 17 is in a predetermined position, the outer peripheral circumference of the pivoting cam 18 and the connecting piece 19a are in contact with each other. If necessary, a separate gear or the like may be used to adjust the power transmission ratio. In addition, it can be configured.

In addition, in order to ensure that the connecting piece 19a is always in close contact with the outer circumferential surface of the rotating cam 18, a spring fixing piece 23 is formed at the center of the rotating shaft of the rotating cam 18, and the connecting piece 19a and the spring are formed. A spring 20 is installed between the fixing pieces 23 so that the restoring force acts on the rotation cam 18 side.

In addition, the movable piece 19 is formed by forming a guide hole 21 having a predetermined size in the horizontal direction so that the guide piece 22 provided on the bottom surface of the cassette 11 is inserted. The guide piece 22 is supported by the guide piece 22 when moved left and right, and the detection piece 15 provided at the upper end of the moving piece 19 is moved to the outside through the detection piece hole 9 formed at the front end of the cassette 11. The left and right movements are guided in the protruding state, so that the left and right movements are sensed by the adjacent detection sensor 6.

Referring to the operating state of the present invention configured as described above, first, the user of the specific size of the paper to be set in the cassette (11). Then, the rear guide 13 mounted on the cassette 11 is brought into contact with the width of the paper through the side guide 12 which adjusts the width of the paper to the rear position of the loaded paper. Then, according to the longitudinal movement of the rear guide 13, the first and second pulleys 16a, 16b are driven by the wire 10 fixedly connected to one side of the rear guide 13, the driving force Is transmitted to the diverting pulley 17.

Thus, the rotating cam 18 which is connected to the turning pulley 17 and is driven by the driving force is rotated, and the connecting piece 19a connected to the rotating cam 18 moves the moving piece 19 to the left and right. The detection piece 15 formed at the upper end of the moving piece 19 is to be moved left and right. Therefore, the detection piece 15 is detected by the detection sensor 6 as the rear end guide 13 moves to detect various paper sizes.

The present invention is constructed and operated as described above can be applied to both the front and side feeding method of the paper, so that it can detect multiple sizes of paper while using the existing detection sensor mounted on the body as it is There is an effect of remarkably reducing the number of cassettes required and enhancing the convenience of use.

Claims (1)

The side guide 12 and the rear guide 13 which can be moved according to the paper size, the paper size detection device of the universal cassette which can load a variety of paper size, on one side of the rear guide (13) A wire 10 fixedly connected and having a linear movement portion 10a and a deflection movement portion 10b which are rotated according to the movement thereof; First and second pulleys 16a and 16b positioned at the rear end and the front end of the rear guide 13 to guide the movement of the linear moving part 10a of the wire 10; A direction change for guiding the movement of the deflection moving unit 10b by switching the moving direction of the wire 10 driven by a predetermined angle while driving the wire 10 according to the movement of the rear guide 13. Pulley 17; A rotating cam 18 that receives power from the turning pulley 17 and rotates; A moving piece (19) connected to the rotating cam (18) and moved left and right according to the rotation of the rotating cam (18), the detection piece (15) being formed at one front end thereof; A spring 20 which provides a restoring force so that the moving piece 19 always comes in close contact with the moving cam 18; And a detection piece hole (9) formed at a front end of the cassette (11) to a predetermined size to guide the detection piece (15) to move left and right while protruding to the outside. Paper size detection device.