JPH0238226A - Device for installing sheet - Google Patents

Abstract

PURPOSE:To prevent width regulating plates or a rear end regulating plate from being forgotten to be moved at the time of exchanging from a first size sheet to a second size sheet or vice versa by providing the rear end regulating plate and the width regulating plates interlockingly. CONSTITUTION:When width regulating plates 7, 9 are moved to a position where movement of a specified size sheet is regulated in a widthwise direction, a rear end regulating plate 13 is moved to a position where the movement of the first sized sheet toward the rear is regulated by an interlocking member 17 which interlocks with the movement of said width regulating plates 7, 9. When the width regulating plates 7, 9 are moved to a position where the movement of a second size sheet which is longer in the feeding direction and narrower than the first size sheet is regulated toward a widthwise direction, the interlocking member 17 makes the rear end regulating plate move to a position where the movement of the second size sheet toward the rear is regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a sheet storage device used in image forming apparatuses such as copying machines and laser beam printers. A seat storage device (
(hereinafter referred to as cassette).

(B) Prior Art Conventionally, cassettes equipped with a middle plate have been known.As shown in FIG. It has an intermediate plate 3' which is T-shaped in plan view and is supported by a T-shaped intermediate plate 3'. A width regulating plate 7.9 is disposed at a position sandwiching the middle plate 3', which regulates movement in the width direction of the sheet fixed to a pair of racks 6' meshing with the pinion gear 5. , these width regulating plates 7 and 9 are movable in six directions indicated by arrows. Further, the tip 7b of one of the width regulating plates 7 is bent approximately horizontally to regulate the amount of sheets loaded on the intermediate plate 3', and furthermore, the lower part of the width regulating plate 7 is bent approximately horizontally. A not-shown protrusion is provided, and the protrusion engages with a groove O carved in the main body 2 corresponding to various sheet sizes. A pressing plate 11 is supported by the other width regulating plate 9 via a plate spring 12, and the pressing plate 11 presses the sheet against the width regulating plate 7. Also,
At the rear of the middle plate 3, a rear end regulating plate 13 is supported to be slidable in the direction of arrow B with respect to the main body 2, and a projection (not shown) is provided at the lower part of the rear end regulating plate 13. Further, the protrusion is adapted to engage with a groove 15 carved in the main body 2 corresponding to various sheet sizes.

When feeding the sheet S from the cassette 1', the operator first places the sheet S on the middle plate 3' of the cassette 1', and then moves the width regulating plates 7 and 9 and the trailing edge regulating plate 13 to Move to a position corresponding to the size of the sheet S. Thereby, the sheet S is restricted from moving in the width direction and the rear direction. Then, when the cassette 1' is attached to the main body of the image forming apparatus (not shown), a lid (not shown) is inserted into an opening (not shown) provided at the bottom of the cassette 1', and the lifter Push up 3'.

As a result, the sheets S stacked on the intermediate plate 3' are pressed against a paper feed roller (not shown). Furthermore, when a start key (not shown) is pressed in this state, the paper feed roller starts rotating, and the sheets S stored in the cassette 1' are separated one by one by the roller and a separation pad (not shown). Then, only the topmost sheet S is fed.

(c) Problems to be Solved by the Invention However, in the above-mentioned cassette 1', when switching from letter size sheets to A4 size sheets, since the widths of the letter size sheets and A4 size sheets 1~ do not change much, Sometimes I forget to move the width regulating plates 7 and 9.
Also, when switching from A4 to letter, I sometimes forgot to move the rear end regulating plate 13. In such a state, the movement of the sheet in the width direction or conveyance direction is not restricted, so the sheet may be skewed when the cassette 1' is installed in the image forming apparatus main body or when it is fed. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sheet storage device in which the rear end regulating plate moves in conjunction with the width regulating plate, thereby solving the problems mentioned above.

(d) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, referring to FIG. .
An interlocking member (17) is provided that moves in conjunction with the movement of the width regulating plate (7, 9), and regulates movement of the width regulating plate (7, 9) in the width direction of the first predetermined size sheet. position, the rear end regulating plate (13) moves to a position where it regulates the rearward movement of the first predetermined size sheet, and also moves the width regulating plate (7, 9) to the first predetermined size sheet. When the second predetermined size sheet, which is longer in the feeding direction and narrower in width than the predetermined size sheet, is moved to a position that restricts movement in the width direction,
The present invention is characterized in that the rear end regulating plate (13) is configured to move to a position where it regulates the rearward movement of the second predetermined size sheet.

Further, when the width regulating plate (7, 9) is moved to a position where it regulates movement in the width direction of a sheet narrower than the second predetermined size sheet, the width regulating plate (7, 9) It may be configured such that the interlocking with the rear end regulating plate (13) is released.

(E) Operation Based on the above-described configuration, when the width regulating plate (7, 9) is moved to the position where the movement of the first predetermined size sheet in the width direction is restricted, the width regulating plate (7, 9) is prevented from moving. The interlocking member (17) that moves in conjunction moves the rear end regulating plate (13) to a position that regulates the rearward movement of the first predetermined size sheet, and also moves the width regulating plate (7, 9) When the second predetermined size sheet, which is longer in the feeding direction and narrower in width than the first predetermined size sheet, is moved to a position that restricts movement in the width direction,
The interlocking member (17) moves the rear end regulating plate (13) to a position where it regulates the rearward movement of the second predetermined size sheet.

b) Examples Examples of the present invention will be described below with reference to the drawings.

Note that the same parts as those described above are given the same reference numerals and the description thereof will be omitted.

Pins 16 are protruded from the main body 2, and these pins 16 are fitted into elongated holes 17b formed in a cam plate 17 having a cam surface 17a. The cam plate 17 can slide in the direction of the arrow. Also,
Springs 19.19 are disposed at the rear end of the main body 2, and these springs 19.19 bias the cam plate 17 in the sheet conveyance direction. Further, the rack 6 is formed with a cam portion 6b having a cam surface 6a.
a is in contact with the cam surface 17a of the cam plate 17.

Since this embodiment has the above-described configuration, when feeding an A4 size sheet, the operator must move the width regulating plate 7.9.
is moved in the direction of arrow C (see FIG. 2) and located at a position corresponding to A4 size. At this time, these width regulating plates 7.
The cam surfaces 6a of the cam portions 6b of these racks 6.6 move the cam plate 17 backward against the biasing force of the springs 19. As a result, the rear end regulating plate 13, which moves together with the cam plate 17,
Move to a position that restricts backward movement of the 4-size sheet.

Further, when feeding a letter-sized sheet, the width regulating plates 7 and 9 are moved in the direction of the arrow (see FIG. 1) to be located at a position corresponding to the letter-sized sheet.

At this time, as the distance between the cam surfaces 6a, 6a of the rack 6.6, which moves together with the width regulating plates 7.9, becomes wider, the cam plate 17 moves in the sheet conveying direction by the biasing force of the spring 19. A rear end regulating plate 1 that moves together with the cam plate 17
3 moves to a position that restricts the backward movement of the letter size sheet.

Furthermore, as another embodiment, a case where sheets narrower than letter-sized sheets are stacked in the cassette 1 will be described with reference to FIGS. 3 to 5. Note that the same parts as those described above are given the same reference numerals and the description thereof will be omitted.

The cam plate 17 has a plate spring 20 fixed at one end to the main body 2.
The cam surface 17a of the cam plate 17 is inclined in the vertical direction. Further, the rear end surface 17c of the cam plate 17 is also inclined in the vertical direction, so that the urging force of the spring 19 acts on the cam plate 17 from the rear end regulating plate 13 via the rear end surface 17c. .

When loading small size sheets such as B5 size sheets or envelopes in the cassette 1, when the width regulating plates 7 and 9 are moved in the C direction to restrict the movement of the small size sheets in the width direction, The moving rack 6.6 pushes the cam plate 17 down in the E direction to the position shown by the two-dot chain line (see FIG. 4), and the engagement between the rack 6.6 and the cam plate 17 is released. At this time, the rear end regulating plate 13 is located above the rear end surface 17c of the cam plate 17, and is urged in the sheet conveying direction by the springs 19 to release the engagement with the cam plate 17. Thereby, the operator restricts the movement of the small size sheet in the width direction using the width restriction plate 7.9, and also restricts the movement of the small size sheet in the rear direction using the rear end restriction plate 13.

(G) As described in detail of the invention (H) According to the present invention, the width regulating plate is
When the first predetermined size sheet is moved to a position where it restricts movement in the width direction, the trailing end regulation plate moves to a position where it restricts movement in the rear direction of the first predetermined size sheet, and the width regulation plate is When the second predetermined size sheet, which is longer in the feeding direction and narrower in width than the first predetermined size sheet, moves to a position where the movement in the width direction is restricted, the trailing edge regulating plate moves behind the second predetermined size sheet. Since the structure is configured to move to a position where movement in the direction is restricted, the rear end regulating plate and the width regulating plate are moved in conjunction with each other to move from the first predetermined size sheet to the second predetermined size sheet or from the second predetermined size sheet. When transferring the second predetermined size sheet to the first predetermined size sheet, it is possible to prevent forgetting to move the width regulating plate or the rear end regulating plate.

Furthermore, when the width regulating plate is moved to a position where it regulates movement in the width direction of a sheet narrower than the second predetermined size sheet, the width regulating plate and the rear end regulating plate are not interlocked. When configured to be released, a sheet narrower in width than the second predetermined size sheet can be stored, and the width and rearward movement of the sheet can be restricted.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a seat storage device according to the present invention, and FIG. 2 is a plan view showing the operation of the present invention. Also,
3 to 5 are diagrams showing embodiments of the pond of the present invention. Furthermore, FIG. 6 is a plan view showing a conventional example. 1.1'... Seat storage device 7.9... Regulating plate, 13... Rear end regulating plate 17
...Interlocking parts

Claims (1)

[Claims] 1. A seat storage device comprising: a width regulating plate that regulates the movement of the sheet in the width direction; and a rear end regulating plate that regulates the movement of the sheet in the rear direction; An interlocking member is provided that moves the end regulating plate in conjunction with the movement of the width regulating plate, and when the width regulating plate is moved to a position that regulates movement of the first predetermined size sheet in the width direction, the rear end The regulating plate moves to a position where it regulates the movement of the first predetermined size sheet in the rear direction, and the width regulating plate is moved to a position where the width regulating plate is moved to a second sheet having a longer length in the feeding direction and a narrower width than the first predetermined size sheet. When the second predetermined size sheet moves to a position where it restricts movement in the width direction, the rear end regulating plate moves to a position where it restricts movement of the second predetermined size sheet in the rear direction. A seat storage device featuring: 2. When the width regulating plate is moved to a position that regulates movement in the width direction of a sheet narrower than the second predetermined size sheet, the interlocking between the width regulating plate and the rear end regulating plate is released. 2. The seat storage device according to claim 1, wherein the seat storage device is configured to be