JPH0613152Y2 - Paper cassette - Google Patents

Description

TECHNICAL FIELD The present invention relates to a paper feed cassette used in an office machine such as a printer or a copying machine.

2. Description of the Related Art First, a conventional example is shown in FIGS. Reference numeral 1 denotes a cassette case having an upper surface opening, and the cassette case 1 is spaced apart from a front edge thereof by a predetermined distance, and both front sides of a cover 2 which covers the upper surface opening of the cassette case 1 have a pivot axis 3 as a fulcrum. It is attached so that it can rotate up and down. This cover 2
A guide member 7 having a U-shaped cross section is provided on the upper surface of the guide member 4 having a guide piece 4 orthogonal to the upper surface and bent surfaces 5 and 6 that are bent inward from the upper and lower edges of the guide piece 4. These guide members 7 are held in a groove 9 formed in the upper surface of the cover 2 so that the left and right positions thereof can be adjusted. Further, as shown in FIGS. 5 and 6, a pressing plate 11 for holding a large number of sheets 10 in a loaded state is held in the cassette case 1 so as to be capable of undulating about a spindle 12. Together with this pressing plate 1
An opening 8 is formed so as to face the front center of 1. Further, on both sides of the cover 2, there are integrally formed projections 13 that project forward from the rotation axis 3 and face the upper surface of the pressing plate 11.

Therefore, as shown in FIG. 6, when the cassette case 1 is mounted on a printer or a copying machine, the upper front edge of the cassette case 1 faces the paper feed roller 14, and the pressing plate 11 projects from the opening 8. Then, the sheet 10 on the pressing plate 11 is pressed against the sheet feeding roller 14 by being pressed by a pressing body (not shown). Then, the paper 10 is fed by driving the paper feed roller 14 and the feed roller 15 located in front of the paper feed roller 14.

Further, when the paper 10 in the cassette case 1 is exhausted, it is necessary to push down the pressing plate 11. In this case, as shown by the phantom line in FIG. By rotating the cover 2 in the vertical direction, the pressing plate 11 can be pushed down by the protrusion 13 of the cover 2,
Therefore, the sheet 10 can be replenished without removing the cassette case 1 from the printer or the copying machine.

On the other hand, when the paper 10 is manually fed, the upper surface of the cover 2 is used as a guide surface for the paper 10. At this time, both side edges of the paper 10 are guided by the guide pieces 4 of the guide member 7.
It is guided by.

Problems to be Solved by the Invention Since the cover 2 is opened outside the housing with the cassette case 1 attached to the housing of the printer or the copying machine, the feed roller 14 inside the housing and the pipe of the front edge of the cover 2 can be connected to each other. Is the sixth
As shown in the figure, a certain length A is required, and the position of the guide piece 4 is also separated from the paper feed roller 14. The length of the sheet 10 differs depending on the type. For a short sheet, a length obtained by adding the length A from the front part of the guide piece 4 to the paper feed roller 14 and the length B from the paper feed roller 14 to the feed roller 15 is used. There is less than that. In this case, when the paper 10 is inserted by sliding the top surface of the cover 2, the rear edge of the paper 10 is guided by the guide piece 4.
Thus, the leading edge does not reach the feed roller 15 even after passing through. As a result, the position of the sheet 10 in the left-right direction is displaced,
There is a problem that the paper 10 meanders and the print line is inclined.

Means for Solving the Problems An upper front edge is urged upward to a cassette case having an upper surface opening facing a paper feed roller, and a pressing plate on which a large number of sheets are stacked is provided undulatingly, and the front edge is A cover that covers the upper surface opening of the cassette case at a position separated from the paper feed roller by a predetermined distance is attached to the cassette case so as to be rotatable up and down with a rotation axis located on both sides of the front portion thereof. A pair of left and right guide pieces contacting both side edges of the paper located on the upper surface of the cover are provided on both sides of the upper surface of the cover, and a pair of left and right guide pieces extending from the upper surface of the cover to the paper feed roller side on the extension surface of the guide piece. The movable guide piece is provided so as to be vertically rotatable.

When the paper is manually inserted with the upper surface of the cover as the sliding surface, both side edges of the paper can be guided by the guide piece on the upper surface of the cover and the movable guide piece located in front of the guide piece. Even when using paper, it is possible to prevent the paper from meandering, and the movable guide piece approaches from the upper surface of the cover toward the paper feed roller, but the pivotal movement of the movable guide piece opens and closes the cover. You can do it freely.

Embodiment An embodiment of the present invention will be described with reference to FIGS. The same parts as those described in FIGS. 4 to 6 are designated by the same reference numerals, and the description thereof will be omitted. On the paper feed roller 14 side of the cover 2, a pair of left and right having a movable guide piece 16 arranged on an extension surface of the guide piece 4 and a bent surface 17 bent inward from the lower edge of the movable guide piece 16. Guide member 18
Is attached to the outside of the guide piece 4 by a support shaft 19 so as to be vertically rotatable. Further, the guide member 7 is formed with a projecting piece 20 that extends outward from the bending surface 5 and then bends upward. Therefore, the guide piece 4 of the guide member 7 and the projecting piece 20 form a U-shape, and the movable guide piece 16 has the guide piece 4
It is sandwiched by the projecting piece 20 and the horizontal deflection is prevented.

In such a structure, as shown in FIG. 3, when the paper 10 is inserted into the paper feed roller 14 from the upper surface of the closed cover 2, the both side edges of the paper 10 have the guide piece 4 and the movable guide piece 16. Will be guided by. Since the movable guide piece 16 is close to the paper feed roller 14, even if the leading edge of the paper 10 reaches the feed roller 15, it still guides both side edges of the paper 10. This makes it possible to prevent the sheet 10 from meandering even when the short sheet 10 is used. Also, cassette case 1
When replenishing the paper 10 with paper, the cover 2 is vertically rotated about the rotation axis 3 as shown by the phantom line in FIGS. 2 and 3, and the pressing plate 11 is rotated by the protrusion 13 thereof. However, at this time, the contact force between the guide member 18 and the cassette case 1 causes the guide member 18 to rotate about the support shaft 19, so that the opening operation of the cover 2 is not hindered.

A spring may be provided between the pressing plate 11 and the bottom surface of the cassette case in order to urge the pressing plate 11 upward.

Effect of the Invention Since the present invention is configured as described above, when the paper is manually inserted with the upper surface of the cover as the sliding surface, the guide pieces on the upper surface of the cover and the movable guide piece located in front of the paper guide the side edges of the paper. By this, it is possible to prevent the meandering of the sheet even when using a sheet of short length, and the movable guide piece approaches from the upper surface of the cover toward the feed roller, With the pivotal movement of the movable guide piece, the cover can be freely opened and closed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 3 show an embodiment of the present invention.
1 is a perspective view showing a state in which the cover is closed, FIG. 2 is a perspective view showing a state in which the cover is open, FIG. 3 is a vertical side view, and FIGS. 4 to 6 show conventional examples. 4 is a perspective view showing a state in which the cover is closed, FIG. 5 is a perspective view showing a state in which the cover is open, and FIG. 6 is a vertical side view. 1 ... Cassette case, 2 ... Cover, 3 ... Cover rotation axis, 4 ... Guide piece, 10 ... Paper, 11 ... Press plate, 13 ... Projection, 14 ... Paper feed roller , 16 …… Movable guide piece

Claims (1)

[Scope of utility model registration request] 1. A pressing plate, on which an upper front edge is biased upward and a large number of sheets are stacked, is erected on a cassette case having an upper surface opening facing a sheet feeding roller, and the front edge has the front edge. A cover for covering the upper surface opening of the cassette case at a position separated from the roller by a predetermined distance is mounted on the cassette case so as to be vertically rotatable with rotation axes located on both sides of the front portion thereof, and the upper surface of the cover is covered. A pair of left and right guide pieces that come into contact with both side edges of the paper located on the upper surface of the cover are provided on both sides, and a pair of left and right movable pieces that extend from the upper surface of the cover to the paper feed roller side on the extension surface of the guide pieces. A paper feed cassette characterized in that a guide piece is provided so as to be rotatable up and down.