JPH0220529B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper feeding device used in a copying machine, etc.
Especially easy to load recording sheets of different sizes.
The present invention relates to an improvement of a paper feeding device capable of feeding paper.

[Background of the invention]

Recently, in order to streamline office work, copying machines have come to use paper feeding devices called universal cassettes, which allow recording sheets of various sizes to be loaded and fed in one cassette. . In the universal cassette, in order to load and feed recording sheets of different sizes, the guide member that restricts the left and right position of the recording sheet and the holding member that restricts the rear edge of the recording sheet are movable. It is designed to be set according to the size of the sheet.

However, when changing the size of conventional universal cassettes, especially recording sheets, it is necessary to move the left and right guide members together for paper feeders that are structured to change the size based on the center line of the sheet. However, the operation was time-consuming, and it was inconvenient to replace the recording sheet.

However, conventional paper feeding devices, for example,
No. 18259, (Jitko No. 53-26983, Jitko No. 53-44446
As shown in No. 1, since there was no guide plate on both sides at the rear end of the sheet, the rear end of the sheet was unsteady when feeding the recording sheet, which worsened the sheet feeding condition. Furthermore, in JP-A No. 54-47659, a sheet guide plate is also provided at the rear end, but the side guide plates and the rear guide plate are configured to be operated separately, and the recording paper The operation of the guide plate after it was attached to the paper feeder was complicated, and there were drawbacks such as forgetting to operate one side.

[Purpose of the invention]

An object of the present invention is to provide a paper feeding device that is newly equipped with a recording sheet size indicating mechanism in the above-mentioned paper feeding device, and can easily change the size along with changing the indicating section by one operation. .

[Structure of the invention]

The above purpose is to provide a paper feed tray and an intermediate plate 1 which is arranged at a position in front of the paper feed tray in the paper feeding direction, whose rear part is pivoted with respect to the paper feed direction, and whose front part is movable up and down.
And, on both sides of the middle plate 1, with respect to the paper feeding direction of the recording paper,
Guide members 2 and 3 that guide the recording paper from the sides, and a holding member 1 that is disposed at a rear position of the paper feed table in the recording paper feeding direction and holds the rear end and side of the recording paper.
7, 18, a slider 9 slidably provided on the paper feed table, an actuating member 11, 55 for sliding the slider 9, and a protrusion 8 provided on the slider 9 with one end attached. The other end is loosely inserted into the guide members 2 and 3, and the protrusion portions 6,
In order to move the guide members 2, 3 by swinging the levers 25, 26 by sliding the slider 9 and the levers 25, 26 to which the slider 9 is pivotally connected, the guide members 2, 3 are moved in the paper feeding direction. One end is loosely inserted into the protrusion 12 provided on the slider 9, and the other end is inserted into the holding member 1.
7, 18, and the projection part 1 is placed on the bottom surface of the paper feed table.
In order to move the holding members 17 and 18 by swinging the levers 15 and 16 by the sliding of the slider 9 and the levers 15 and 16 to which the holding members 3 and 14 are pivoted, the holding members are moved according to the size of the recording paper. This is achieved by a paper feeding device characterized in that it is equipped with a guide means for guiding the recording paper diagonally, and a display means for displaying the recording paper size on the outside of the paper feeding table in conjunction with the sliding of the slider 9.

〔Example〕 Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a perspective view showing the structural arrangement of a first embodiment of the present invention. The recording sheet is fed in the direction of arrow A. In the figure, the paper feed table 0 is indicated by a chain line and has a box shape, and many parts are attached to this as a board.

Reference numerals 2 and 3 indicate guide members that regulate the left and right positions of the leading edge of the recording sheet, and 17 and 18 indicate holding members that regulate both sides of the rear end and the rear end in the longitudinal direction of the recording sheet. The guide members 2 and 3 and the holding members 17 and 18 regulate the storage position of the recording sheet.

Buffer members 23, 24 made of sponge, felt, etc. are attached to the inside of the guide members 2, 3 in order to reduce the contact pressure with the recording sheet.

Both side ear portions 101 and 102 of the middle plate 1 fit into fixed protrusion portions 21 and 22 on both side plates of the paper feed table 0, and are swung up and down about the protrusion portions 21 and 22 as the center of swing. It is configured as follows. A leaf spring 30 biased between the lower surface of the intermediate plate 1 and the bottom surface of the paper feed tray 0 is placed, and has a rear end positioning function when a relatively small size sheet of paper is fed laterally.

The levers 25 and 26 are L-shaped levers that swing around protrusions 6 and 7 fixed on the bottom of the paper feed table 0, and have two elongated holes at their ends. The fixed protrusion 8 on the slider 9 located approximately at the center in the width direction is loosely inserted into one of the elongated holes, and the fixed protrusions 4 and 5 provided on the guide members 2 and 3 are loosely inserted into the other elongated hole.

The levers 15 and 16 are also L-shaped levers that swing around protrusions 13 and 14 fixed on the bottom surface of the paper feed table 0, and have two elongated holes at their ends. The fixed protrusion 12 on the slider 9 is loosely inserted into one of the elongated holes,
Fixed protrusions 19 and 20 provided on L-shaped holding members 17 and 18 are loosely inserted into the other elongated hole.

The slider 9 with the fixed projections 8, 12 has a rack 27a on its side. On the other hand, on the outside of paper feed tray 0,
There is a display section 41 for recording sheets such as A4, B4, A3, etc., and there is an instruction lever 11 that swings around a protrusion 10 fixed on the bottom of the paper feed tray 0, and the instruction section 11a at one end is for display. There is a sector gear 27b at the other end, and a rack 27 on the side of the slider 9.
meshes with a.

Next, a case will be described in which the size of a recording sheet is changed with respect to the paper feeding device having the structure described above. The figure shows a state in which the recording sheet size is adjusted to A3 size, but we will now exemplify a case where the sheet size is changed to B4 size, which is a smaller sheet size.

The instruction section 11a is moved from display A3 to display B4. The instruction lever 11 swings clockwise in the figure with the protrusion 10 as the center of swing. Instruction lever 11
The upper sector 27b is the rack 2 on the side of the slide 9.
7a, so the slider 9 is moved to the right in the figure. A groove corresponding to sheet sizes A4, B4, A3, etc. is cut on the side of the slider, so when the slider 9 moves to the right and reaches a position corresponding to the B4 size, the stop pawl 40 jumps into the groove. Then the slider 9 stops.

When the slider 9 moves to the right, the levers 25 and 26 loosely inserted into the fixed protrusions 8 and 12 on the slider 9
and the levers 15 and 16 have protrusion portions 6 and 7, respectively.
and oscillates with 13 and 14 as the oscillation centers. By swinging the levers 25, 26, the levers 25, 26
The guide members 2 and 3 are moved symmetrically along the groove formed on the paper feed table 0 via the fixed protrusions 4 and 5 that are loosely inserted into the elongated holes, and the inner dimensions of the guide members 2 and 3 are The width is B4 size. Similarly, due to the swinging of the levers 15 and 16, the holding members 17 and 18 are inserted into the grooves provided on the paper feed tray 0 via the fixed protrusions 19 and 20 that are loosely inserted into the elongated holes of the levers 15 and 16. L-shaped holding member 1 that moves symmetrically along the
The opposing inner dimensions of 7 and 18 are the width dimension of B4 size, and the other side is a position that restricts the rear end of B4 size.

As described above, by one operation of aligning the indicating part 11a with the display A4, the B4 size periphery is regulated,
You can easily switch from an A3 size cassette to a B4 size cassette.

FIG. 2 shows the differences between the second embodiment and the first embodiment. In the first embodiment, the size can be changed all at once by moving the instruction section 11a, but in the second embodiment, the size instruction can be changed by turning the dial 55. Guide members 2, 3 and holding members 17, 1
This is an example in which 8 movements are performed simultaneously.

A rack 51 is provided on the upper surface of the slider 9, and a pinion 53 and a dial 55 are fixed to both ends of a shaft 54 fitted with a fixed bearing 52 on the paper feed tray 0. They mesh together.

When the dial 55 is now turned counterclockwise, the slider 9 is rotated through the rack 51 that engages with the pinion 53.
move to the right. on the side of slider 9
At the position where the stop pawl 40 is inserted into the groove corresponding to the B4 size, the indicator 11a indicates the display B4, and the guide members 2, 3 and the holding member 1
7 and 18 are moved to regulate the B4 size periphery.

〔Effect of the invention〕

As described above, in the present invention, guide members 2 and 3 are provided on both sides of the finger feed table 0 to guide both sides of the recording paper according to the recording paper size, and furthermore, the guide members 2 and 3 are provided on both sides of the finger feed table 0 to guide the recording paper on both sides according to the recording paper size. Holding members 17 and 18 are provided for regulating the rear end and both sides, respectively, and members 11 and 55 are operated in accordance with a display section that displays the size of the recording paper.
By operating the guide members 2, 3 and the holding members 17, 18 to a position corresponding to the size of the recording paper, the guide members 2, 3 and the holding members 17, 18 are simultaneously moved to a position corresponding to the size of the recording paper. Therefore, there is no possibility of paper feeding failure due to forgetting to operate the guide members 2, 3 or the holding members 17, 18, and it is possible to easily and reliably perform a switching operation when the size of the recording paper is changed.

[Brief explanation of drawings]

FIG. 1 shows a first embodiment of the invention, and FIG. 2 is a perspective view of the second embodiment. 0... Paper feed tray, 1... Middle plate, 2, 3... Guide member, 11... Instruction lever, 11a... Instruction section, 1
7, 18... Holding member, 41... Display section.

Claims (1)

[Claims] 1 a paper feed tray, disposed at a front position in the paper feed direction with respect to the paper feed tray, and whose rear portion is pivotally connected with respect to the paper feed direction;
An intermediate plate 1 whose front part is movable up and down, guide members 2 and 3 that guide the recording paper from the side in the feeding direction of the recording paper on both sides of the intermediate plate 1, and the paper feed tray. a slider 9 that is disposed at a rear position in the recording paper feeding direction and has holding members 17 and 18 that hold the rear end and sides of the recording paper, and is slidably provided on the paper feed tray; Actuating member 1 that slides 9
1, 55, one end was loosely inserted into the protrusion 8 provided on the slider 9, the other end was loosely inserted into the guide members 2, 3, and the protrusion parts 6, 7 were pivotally mounted on the bottom surface of the paper feed table. When the levers 25, 26 and the slider 9 slide to swing the levers 25, 26 and move the guide members 2, 3, the guide members 2, 3 are guided in a direction perpendicular to the paper feeding direction. one end is loosely inserted into the protrusion 12 provided on the slider 9, the other end is loosely inserted into the holding members 17, 18, and the protrusion parts 13, 14 are pivotally mounted on the bottom surface of the paper feed table. A guide means for guiding the holding members obliquely according to the recording paper size when the holding members 17, 18 are moved by swinging the levers 15, 16 by sliding of the levers 15, 16 and the slider 9. and display means for displaying the recording paper size on the outside of the paper feed tray in conjunction with the sliding of the slider 9.