JPH05186059A - Paper sheet feeding cassette - Google Patents

Abstract

PURPOSE:To facilitate positioning of a paper sheet of each size by providing a slide plate and a slider with an end guide free to slide in the direction orthogonal with the side guide and forming a cam surface and a projection to engage with each other on the facing surface of the side guide and the slide plate. CONSTITUTION:In a cassette case 1 in which one of a pair of right and left side guides 2, 3 to guide forms is energized inside and held free to slide in the cross direction of the forms, a slide plate 8 and a slider 7 with an end guide 9 to be made contact with the end edge of the forms are provided free to slide. Thereafter, a cam surface 14 and a projection 15 to engage with each other on the facing surface of the side guide 3 and the slide plate 8 are formed. By changing the engagement position of the projection 15 against the cam surface 14, position of the side guide 3 is automatically changed in accordance with cross measurement of the forms. Consequently, it is possible to simplify handling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed cassette mounted in a printer.

[0002]

2. Description of the Related Art Since there are various sizes of paper to be printed by a printing apparatus, and it is necessary to make the paper feed position constant, as shown in FIG. A side guide 21 for guiding the edge is fixedly provided, and a side guide 22 for guiding the other side edge of the sheet is provided on the other side of the cassette case 20 slidably in the width direction of the sheet,
Further, the cassette case 20 is provided with a rib 24 for detachably holding an end guide that supports the edge of the sheet, and one side guide 22 is moved according to the width dimension of the sheet and fixed with a screw 26. There is a paper feed cassette in which the end guide 23 is removed and the edge of the paper is supported by the end surface 25 of the cassette case 20 when it is long. Also,
There is also a paper feed cassette in which the position of the end guide 23 can be changed according to the length of the paper by providing the ribs 24 at a plurality of positions.

[0003]

In the conventional paper feeding cassette, the mounting position of the side guide 22 is changed according to the width dimension of the sheet, and the end guide 23 is attached or detached according to the length dimension of the sheet. Alternatively, since the mounting position of the end guide 23 has to be changed, the handling is troublesome when frequently changing the size of paper.
Also, if multiple types of paper feed cassettes are prepared according to the paper size, the paper feed cassette must be reattached to the printing device every time the size of the paper used is changed, which is also troublesome to handle. is there.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a pair of left and right side guides that are in contact with both side edges of a sheet, and at least one of these side guides is urged inward so that the sheet width direction. A cassette case slidably held in the cassette case, and a slider having a slide plate positioned between the side guides and an end guide abutting against the edge of the sheet is attached to the cassette case. It is provided slidably in a direction orthogonal to the facing direction, and a cam surface and a protrusion that engage with each other are formed on the facing surfaces of the side guide and the sliding plate held slidably.

[0005]

[Operation] When the position of the end guide is changed according to the length of the paper, the position of engagement of the projection with the cam surface changes, so the position of the side guide is automatically changed according to the width of the selected paper. Therefore, the handling can be simplified.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a flat cassette case 1 having an open top is provided. A side guide 2 that guides one side edge of the sheet is integrally formed on one side of the cassette case 1, and a side guide 3 that guides the other side edge of the sheet is inside the other side of the cassette case 1 by a spring 4. It is biased by and is held slidably in the width direction of the paper. The side guide 3 has a flat surface 5 that supports a part of the lower surface of the paper. A groove 6 is formed at the center of the bottom of the cassette case 1. Reference numeral 7 is a slider. The slider 7 has a sliding plate 8 slidably held in the groove 6.
And an end guide 9 that is in contact with the edge of the sheet.
Then, the side guide 3 slidably held is formed with a cam surface 14 formed by connecting reference surfaces 10, 11, 12 arranged at three places by a slope 13.
A protrusion 15 that abuts on the sliding plate 8 is formed on the side surface of the sliding plate 8. The dimensions of the reference surface 10 correspond to B5 size paper, the dimensions of the reference surface 11 correspond to letter size paper, and the dimensions of the reference surface 12 correspond to A4 size paper. Further, a stepped recess 16 is formed on the edge of the opening surface of the cassette case 1.
A protrusion 17 corresponding to the above is formed on the edge of the bottom surface of the cassette case 1.

In such a configuration, when using a letter size sheet, as shown in FIG. 3A, the slider 7 is arranged so that the edge of the sheet and the inner surface of the end guide 9 are aligned with each other. At this time, the protrusion 15 of the slider 7 and the reference surface 11 of the cam surface 14 are brought into contact with each other so that the position of the side guide 3 can be automatically changed according to the width dimension of the letter size paper. it can.

Similarly, when using A4 size paper, the slider 7 is slid so that the edge of the paper and the inner surface of the end guide 9 are aligned, as shown in FIG. 3B. However, at this time, the protrusion 15 of the slider 7 and the cam surface 1
By making contact with the reference surface 12 of No. 4, the position of the side guide 3 can be automatically changed according to the width dimension of the A4 size sheet.

When B5 size paper is used, the slider 7 is slid so that the edge of the paper and the inner surface of the end guide 9 are aligned, as shown in FIG. 3 (c). However, at this time, the protrusion 15 of the slider 7 and the cam surface 14
The position of the side guide 3 can be automatically changed according to the width dimension of the B5 size sheet by contacting with the reference surface 10.

The above-described operation can be obtained by forming the cam surface 14 on the side surface of the sliding plate 8 of the slider 7 and forming the projection 15 on the side guide 3.

Further, since the cassette case 1 is formed with the recess 16 located at the edge of the opening surface and the projection 17 located at the edge of the bottom surface, another cassette case 1 of the same kind is stored in a stack. be able to. That is, as shown in FIG. 2, by fitting the projection 17 of the cassette case 1 in the upper stage into the recess 16 of the cassette case 1 in the lower stage, both can be stacked in a stable state.
Therefore, as shown in FIG. 4, in addition to the cassette case 1 attached to the printing apparatus P, an unused cassette case 1
When there are a plurality of cassette cases, the opening surface of the lower cassette case 1 can be closed by the upper cassette case 1. As a result, even when the sheets are still stored in the lower cassette case 1, it is possible to prevent the internal sheets from being moistened. The same purpose can be achieved by closing the opening surface of the uppermost cassette case 1 with the cover 18. In this case, it is desirable to fit the edge of the cover 18 into the recess 16 of the cassette case 1.

Although the side guides 2 are fixedly provided on the cassette case 1 in the above embodiment, the side guides on the left and right sides may be moved in the width direction of the sheet. In this case, the cam surfaces and the protrusions are formed on the opposing surfaces of the left and right side guides and both sides of the slider.

[0013]

The present invention is provided with a pair of left and right side guides that come into contact with both side edges of a sheet, and at least one of these side guides is biased inward to be slidable in the width direction of the sheet. And a slider having a slide plate positioned between the side guides and an end guide abutting against the edge of the sheet is provided in the cassette case held at a right angle to the side guide facing direction. It is provided slidably in the direction in which the side surface and the sliding plate that are slidably held are provided with cam surfaces and protrusions that engage with each other, so that they can be adjusted to the length of the paper. When the position of the end guide is changed by changing the position of the end guide, the position of the side guide can be automatically changed according to the width of the selected paper.
Therefore, there is an effect that the handling can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a plurality of cassette cases are stacked with the internal structure omitted.

FIG. 3 is a plan view showing a relative relationship between a slider and a side guide corresponding to a size of paper.

FIG. 4 is a perspective view showing a handling state of a cassette case.

FIG. 5 is a perspective view showing a conventional paper feed cassette.

[Explanation of symbols]

 1 Cassette Case 2, 3 Side Guide 7 Slider 8 Sliding Plate 9 End Guide 14 Cam Surface 15 Projection

Claims (1)

[Claims] 1. A pair of left and right side guides that are in contact with both side edges of the sheet are provided, and at least one of the side guides is biased inward and slidably held in the width direction of the sheet. A cassette case is provided, and a slider having a sliding plate located between the side guides and an end guide abutting against the edge of the sheet is slid in the cassette case in a direction orthogonal to the facing direction of the side guides. A sheet feeding cassette, characterized in that a cam surface and a protrusion which are engaged with each other are formed on the facing surfaces of the side guide and the sliding plate, which are movably provided and are held slidably.