JPS6259017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to devices such as electrophotographic copying machines and facsimile machines, which are used to produce sheets of paper cut into various sizes and stacked together, or stacked sheets of different types of manuscripts. In a sheet feeding device that can selectively feed sheets, it relates to a device that can selectively pull out a specific storage means from among a large number of storage means such as trays that store the same sheets. It is.

Prior Art For example, in a conventional electrophotographic copying machine,
Since paper storage trays are installed inside the aircraft, it was only possible to store two or three of the same paper storage trays.

In addition, there are many sizes of originals such as B4, B5, A4, and A5, and in order not to waste paper, it is necessary to prepare many types of paper corresponding to the original size, so it is necessary to prepare various types of paper corresponding to the original size, so it is necessary to prepare various types of paper corresponding to the original size. If the paper size of the paper does not match the document size, the paper storage tray must be replaced, and the replacement work is complicated.

In particular, recently, electrophotographic copying machines capable of multi-step variable magnification copying have become widespread, and the frequency of replacing the paper storage tray described above has increased, making it impossible to ignore from the standpoint of copying work efficiency. In order to reduce the work as much as possible, if the number of paper storage trays stored in one copying machine is increased, the number of conveyance means such as paper feed rolls in the area where each tray is installed will correspondingly increase. The cost of the entire paper device increases significantly.

Purpose of the Invention The present invention relates to an improvement of a sheet feeding device that overcomes the above-mentioned difficulties.The purpose of the present invention is to improve a sheet feeding device that overcomes the above-mentioned drawbacks. The object of the present invention is to provide a device from which the sheet storage means can be pulled out.

Structure of the Invention In the present invention, a plurality of support means are arranged at required intervals in the vertical direction, and each of the support means supports a plurality of sheet storage means so as to be movable back and forth. In a sheet feeding device, the conveying means for contacting the uppermost layer of sheets in the means and conveying them to the sheet discharge side is moved up and down along the sheet discharge side of the sheet storage means. , a cam member oriented in the vertical direction is attached to each of the sheet storing means, a lever means whose tip abuts against the cam member is pivotably pivoted to the conveying means or other elevating means, and the lever means A restraining means for restraining tilting in one direction is provided, and by raising and lowering the conveying means or other elevating means upward or downward, the lever means restrained by the restraining means collides with the cam member. , the required sheet storage means can be pulled out.

Embodiment An embodiment of the present invention illustrated in the drawings will be described below.

Reference numeral 1 denotes copy paper, which is a laminated sheet cut and stacked in various sizes such as A3, A4, A5, B4, B5, etc. The copy paper 1 is divided into paper trays 2 according to size, or arranged in the vertical and horizontal directions. It is stored in a layered manner with different layers.

Reference numeral 4 denotes shelf supports oriented vertically, and on the front and rear shelf supports 4, at regular intervals in the vertical direction, there are shelves facing diagonally upward in the paper feeding direction (to the right in Figure 1). Six stages of shelf support members 5 are installed facing each other, and a paper tray 2 is attached to the shelf support member 5 via a guide roll 3.
The paper tray 2 is supported by the shelf support member 5 and can be moved back and forth along its longitudinal direction.

Further, the paper tray 2 is located closer to the paper feed position (first
A total of four guide rails 6 (two pairs, two pairs) are vertically oriented on both the left and right sides (the front and rear sides perpendicular to the plane of the paper in Figure 1), and the guide rails 6 have one A pair of first elevating members 7 are fitted so as to be able to move up and down.

Furthermore, a screw rod 8 oriented parallel to the two guide rails 6 is pivotally supported via a bearing 9, and a bevel gear 10 is fitted to the lower end of the screw rod 8. Rotating shaft 12 of step motor 13 via bevel gear 11
A transport means lifting clutch C ₁ is interposed on the rotary shaft 12, and the first lifting member 7 is screwed to the screw rod 8. By forward and reverse rotation of the step motor 13, the first lifting member 7 is adapted to be driven up and down.

Moreover, in the first elevating member 7, a bracket 14 is provided protrudingly on the side facing the paper tray 2,
The base end of a swinging lever 16 is pivoted to the bracket 14 via a pivot shaft 15 so as to be able to swing up and down, and a paper feed roll shaft 17 is pivotally attached to the tip of the swinging lever 16. Pulley 19 integrated with paper roll shaft 17
A belt 20 is stretched over a driving pulley 21 which is supported on the same axis as the pivot shaft 15 of the swing lever 16, and a transmission means (not shown) and a paper feed clutch C ₃ are attached to the transport roll 29 described later. (See FIG. 7) The drive pulley 21 is connected to
When rotated in conjunction with the rotation of the transport roll 29, the paper feed roll 18, which is integrated with the roll shaft 17 via the belt 20, pulley 19 and paper feed roll shaft 17, moves counterclockwise in FIG. It is designed to be rotationally driven.

Further, a paper guide 22 is integrally attached to the lower part of the first elevating member 7 near the paper tray 2 so as to be directed diagonally downward. It is designed to be guided between a pair of upper and lower transport rolls 29.

Further, on the bottom surface of the paper guide 22, a paper 1
A reflective paper feed completion detector RS is installed so as not to interfere with the paper transport. It is now possible to detect whether or not the process has been completed.

Furthermore, the first elevating member 7 and the paper receiving section 3 of the dry type electrophotographic copying machine 34 capable of multi-step variable magnification copying.
5 is connected by a connecting means 24 formed by three pairs of connecting links 25, 26, 27 pivotably connected to each other, and a pair of upper and lower flexible guide chute 28, from which the inner Four upper and lower pairs of transport rolls 29, 30, 31, 32 are pivoted to the joints and ends of the connecting means 24 so as to protrude in the direction and come into contact with each other. , 31, 32, a paper feed motor 33
(See Fig. 7) are appropriately connected by belts (not shown), etc., and the transport rolls 29, 30, 31, and 32 are rotated all at once by the operation of the paper feed motor 33, and the paper is taken out by the paper feed roll 18. Copy paper 1 is fed to a paper receiving section 35 of a copying machine 34.

Further, two pairs of guide rails 36 are vertically oriented on both left and right sides at the rear of the paper tray 2 (on the left side in FIG. 1), and screw rods 37 oriented parallel to these are installed via bearings 38 A second elevating member 39 is fitted into the guide rail 36 so as to be able to rise and fall freely up and down, and is also screwed into the threaded rod 37.
A bevel gear 40 is fitted to the lower end of the screw rod 37,
A tray drawer clutch _C2 is interposed on the other rotating shaft 42 of the step motor 13, and a bevel gear 41 that meshes with the bevel gear 40 is attached to the rotating shaft 42.
When the step motor 13 is rotated in the forward or reverse direction with the tray drawer clutch _C2 connected, the second elevating member 3
9 is adapted to be driven up and down.

Further, a lever 43 is pivotally supported on the second elevating member 39 so as to be tiltable up and down, a roll 44 is pivotally attached to the tip of the lever 43, and is located above the rear end of the lever 43, and is mounted on the second elevating member 39. 39 has a restraining protrusion 45
is provided in a protruding manner, and the tip of the lever 43 can pivot from the horizontal direction to the vertically upward direction.

Furthermore, a cam 46 is provided protruding from the rear surface of the paper tray 2 (left side in FIG. 1) opposite to the lever 43, and the cam 46 is formed with a cam surface 47 that faces rearward and slopes upward. , when the second elevating member 39 descends from above to below, the fifth
As shown by the two-dot chain line in the figure, the lever 43 tilts obliquely upward and the paper tray 2 is held as it is, and conversely, when the second elevating member 39 rises from below to above, As shown in FIG. 4, the lever 43 remains restrained in the horizontal direction by the restraining protrusion 45, and the paper tray 2 is pulled out forward.

Moreover, in the first elevating member 7, a limit switch LS is disposed above and adjacent to the base protrusion 23 integrated with the swing lever 16, and when the limit switch LS is turned off and on, the paper feed roll 18 is moved to the paper tray. It is detected whether or not the copy paper 1 in the paper 2 is in contact with the copy paper 1.

The operation panel (not shown) of the copying machine also has a paper feed ready indicator PD and a tray selection switch that allows you to select one of the six paper trays 2.
SE, a copy number setting switch group NE that can set the number of copies by specifying a number from 0 to 9, a copy start switch ST, and other switch groups are provided.

Furthermore, a microcomputer 50 is installed in the copying machine 34.
The microcomputer 50 has an input interface 51, a ROM 52, and a RAM 5.
3, a CPU 54, and an output interface 55.

Furthermore, the input interface 51 includes a tray selection switch SE, a copy number setting switch group NE,
Copy start switch ST, reflective paper feed completion detector
Signals from input means such as RS, limit switch LS, other switches, and various counters in the copying machine 34 are appropriately adjusted and input to the CPU 54.

The ROM 52 also stores sequence programs necessary for normal copying operations, programs necessary for executing the flowcharts shown in FIGS. 8 through 10, and the like.

Further, the RAM 53 can read and write the input data, data obtained by the operation of the CPU 54 described later, and other data.

Furthermore, the CPU 54 executes programs and instructions stored in the ROM 52 in accordance with input signals from the input interface 51, and sends signals to the step motor 13, the paper feed motor 33, the conveying means lifting clutch C ₁ , Control signals are output to the tray drawer clutch C ₂ , the paper feed clutch C ₃ , the paper feed ready indicator PD, and each operating part of the copying machine 34 .

Since the illustrated embodiment is configured as described above, as shown in FIG.
When the user presses , and inputs the selection of the tray 2 to be pulled out and the number of copies to be made (step), the program enters the paper feeding preparation subroutine (step).

In the paper feed preparation subroutine, as shown in FIG. 9, the steps of the program are to determine whether the previously selected tray 2i and the currently selected tray 2j are equal (step 〓), and if they are equal, the tray Connect drawer clutch _C2 (Step 〓) and proceed to Step 〓. If they are not equal, i.e., i≠j, then the conveying means lifting clutch
_C1 and tray drawer clutch _C2 are connected (step), and aj-ai is calculated as the value of S in step.

Here, ai is the standby position of the first elevating member 7 for the i-th paper tray (a position slightly higher than the highest paper level in the paper tray 2i) when the step motor 1
The number of steps is 3, and the standby position a ₁ of the first elevating member 7 for the first paper tray ₂₁ from the top is taken as the reference position (a ₁ =0) (the 11th
(see figure). Similarly, for aj, the standby position of the first elevating member 7 with respect to the paper tray 2j is shown.

This standby position is also the position to which the first elevating member 7 returns when a series of copying operations is completed.

Furthermore, the second elevating member 3 corresponds to each a above.
Each of the standby positions 9 is located a predetermined number of steps d lower than the tip of the cam 46 at the normal storage position of the paper tray 2, and maintains a predetermined relative positional relationship with a. When the tray is changed and the paper tray 2j is selected, the first elevating member 7 is moved to the standby position aj with respect to the paper tray 2j as described below. At this time, the second elevating member 39
The second elevating member 39 also moves at the same time and reaches the standby position of the second elevating member 39.

Note that bj will also be explained here with reference to FIG.

At the position of the first elevating member 7, there is a position range (ⓓ part) in which paper can be fed, corresponding to each paper tray and spaced apart from each other, and the lowest position of this position range is position b. , which is also expressed by the number of steps of the step motor 13 based on _a1 .

The above values for each paper tray a and b are stored in the ROM 52 of the computer 50.

In the paper feed preparation subroutine, the program proceeds to step after calculating the value of S in the step, where it is determined whether S is positive or negative, and if it is positive, the step motor 13 is reversed to move the first lifting member 7 and the second lifting member 39. is lowered by S (step 〓), and if S is negative, both lifting members 7, 39 are raised by |S| by normal rotation of step motor 13 (step 〓).

Here, both the elevating members 7 and 39 are located at the standby position aj for the newly selected paper tray 2j.

Next, at step 〓, the conveying means lifting clutch C ₁ is once shut off, and the step motor 13 is rotated in the normal direction to raise only the second lifting member 39 by a fixed number of steps d (step 〓), and the paper tray 2j is moved forward. It is pushed out and stopped at the position shown in FIG.

At this point, the tray drawer clutch _C2 is shut off, and the conveyance means lifting/lowering clutch _C1 is connected (Step 〓).
By reversing the step motor 13, the first elevating member 7
(Step 〓).

Simultaneously with this driving of the step motor 13, the number of steps m of the step motor 13 begins to be counted at step . Then, until the paper feed roll 18 comes into contact with the copy paper 1 in the tray 2j, the steps 〓,
〓 and 〓 are repeated and the sheet continues to descend, and when the paper feed roll 18 contacts the copy paper 1 in the tray 2j and the limit switch LS is turned off, the value of m is entered in l (step〓), and the position correction subroutine is started. Enter (step).

However, the limit switch LS is not turned off and the number of steps m being counted at step 〓 is bj-
If the value is equal to or exceeds the value of aj (when the first elevating member 7 has passed the paper feeding position and there is no copy paper 1 in the paper tray 2j), the step motor 13 is stopped at step 〓, and then step After being rotated in the forward direction by several meters, the first elevating member 7 is returned to the standby position aj.

Then, at step 〓, the conveying means lifting/lowering clutch _C1
and connect the tray drawer clutch C ₂ ,
In step 〓, only the second elevating member 39 is lowered by a distance d and returned to the standby position for the paper tray 2j of the second elevating member 39, and the paper tray 2j is returned to the storage position, and the tray drawer clutch _C2 is closed ( Step 〓), the value of j is entered into i (Step 〓), the program stops progressing, and waits until preparations for replenishing the copy paper 1 to the paper tray 2j are made.

Next, when the program proceeds to the position correction subroutine, the number of steps n of the step motor 13 that is lowering the first elevating member 7 is counted again as shown in FIG. 10 (step 〓).

This number of steps n is counted to further lower the first elevating member 7 by a predetermined number of steps _n0 after the paper feed roll 18 contacts the copy paper 1 in the paper tray 2j and the limit switch LS is turned off. A sheet of paper having a thickness corresponding to the number of steps n ₀ can be easily fed at the stop position of the first elevating member 7.

Therefore, compare the number of steps n during counting with n ₀ (step 〓), and if n exceeds n ₀ ,
The value of n added to the value of l is again l
(step =), and the step motor 13
is stopped (step 〓), and the position correction subroutine is ended.

Also, before n reaches n ₀ , the value of l+n changes to bj−
When compared with the value of aj (step〓), when the value is equal to or larger, the step motor 13 is stopped (step〓), and the step motor 13 is rotated forward again by the amount l+n that the first elevating member 7 has descended from aj. be raised (step).

Then, at step 〓, the conveying means lifting/lowering clutch _C1
and connect the tray drawer clutch C ₂ ,
In step 〓, only the second elevating member 39 is lowered by d and returned to the standby position, and the paper tray 2j is returned to the predetermined storage position, and the tray drawer clutch is closed.
C Cut off ₂ (step 〓) and change to i at step 〓
The value is entered, the progress of the program is stopped, and preparations are made for replenishing the copy paper 1 to the same paper tray 2j.

When the position correction subroutine shown in FIG. 10 is completed, the paper feed preparation completion indicator PD is operated in the step of FIG. 8 to display the completion of paper feed preparation, and the copy start switch ST is turned on ( In step 1, it is determined whether the number of copies Z is 1 or not, and if it is 2 or more, the paper feed motor 33 is driven in step 3, and the paper feed clutch _C3 is connected in step 3, and thus the paper feed roll is 18,
With the rotation of the transport rolls 29, 30, 31, 32, j
The copy paper 1 in the th paper tray 2j is conveyed to the dry type electrophotographic copying machine 34. After copying is performed in step, the number of copies Z is subtracted by one (step), and if the limit switch LS remains off in step, the program step returns from step to step 7,
The steps , , , , are repeated. During this time, if the number of copy sheets 1 in the paper tray 2j decreases and the paper feed roll 18 cannot contact the copy sheets 1 with the required contact force, the limit switch LS
is turned on, and the first elevating member 7 is lowered by reversing the step motor 13 in step, and then the step of the program is a position correction subroutine 14
Return to step via . When the number of copies Z becomes 1 in step, the program advances to step.

On the other hand, if the number of copies Z is 1 from the beginning, the program progresses from step to step, and after the paper feed motor 33 is operated, the paper feed clutch _C3 is connected in step, and the program step continues. You can move on to the next step.

Then, in step, when the copy paper 1 passes the paper feed roll 18 by the reflection type paper feed completion detector RS, the paper feed clutch _C3 is shut off in step, and the guide chute 2
8, copy paper 1 is placed in the paper receiving section 35 of the copying machine 34.
After the paper has been completely conveyed to the next step, the paper feed motor 33 is stopped in step, and the final copy is made in step.

After copying is completed, the first elevating member 7 is
Then, the conveying means lifting clutch _C1 is disconnected, the tray drawer clutch _C2 is connected (step), and the second lifting member 39 is lowered by d (step 〓). At the same time as the paper tray 2j is returned to the standby position, the paper tray 2j is also returned to the predetermined storage position.

Then, the tray drawer clutch _C2 is disconnected (step), and the value of j is put into i at step 〓, and the progress of the program is stopped.

In this way, the required paper feeding and copying are accomplished.

In addition, when changing the type of copy paper 1 to be supplied, if the tray selection clutch Sj is appropriately selected and pressed, the same operation as described above is performed, and the first elevating member 7 and the paper feed roll 18 are moved to the selected position. paper tray 2
At the same time, the paper tray 2j is pulled forward and the required copy paper 1 is supplied.

Furthermore, by appropriately changing the spacing between the paper trays 2 and the height of the shelf supports 4, and changing the number of steps a and b stored in the ROM 52 to appropriate values, a wide variety of types can be produced regardless of the size of the copying machine 34. It is possible to quickly and easily select and supply copy sheets 1 of different paper sizes and orientations.

Furthermore, since the desired paper tray 2j can be pulled out or pushed forward in conjunction with the raising and lowering of the first elevating member 7, a motor for pulling out and pushing the paper tray 2 is not required, simplifying the structure and reducing costs. is cheap.

In the embodiment described above, the second elevating member 39 was provided behind the paper tray 2, and the desired paper tray 2 was pulled out by vertical movement of the second elevating member 39. An embodiment in which a desired paper tray 2 is pulled out using the vertical movement of the elevating member 7 will be described based on FIGS. 12 and 13.

Front of paper tray 2 (right side in Figure 12)
A pair of cams 60 are fixed to the outer surface of the cam 6.
The top surface of 0 is a cam surface 61 that faces forward and slopes upward.
is formed.

Furthermore, a tray pull-out lever 62 is pivotally supported on the outer surface of the pair of left and right first elevating members 7 on a shaft 63 that projects from the first elevating members 7 .

A roll 64 is pivoted inward to the tip of the paper tray side (left side in FIG. 12) of the lever 62, and a weight 65 is fixed to the tip of the opposite side (right side in FIG. 12). The shaft 63 and the weight 6 move the right end of the lever 62 downward due to the weight 65.
A restraining protrusion 66 protrudes from and supports the lever 5 so as to keep it horizontal.

Therefore, the lever 62 can swing counterclockwise from the horizontal position, and the tip of the lever (the position of the roll 64) can swing from the horizontal direction to the vertical downward direction as long as the vertical position is not exceeded. It's becoming like that.

Therefore, when the first elevating member 7 descends, the roll 64 at the tip of the lever 62 grips the upper part of the cam surface 61 of the cam 60, as shown by the solid line in FIG. At the same time, the roll 64 rolls on the cam surface 61 and pulls out the paper tray 2 forward (see FIG. 12), and the paper feed roll 18 at the tip of the swing lever 16 feeds the top layer of copy paper in the paper tray 2. contact and make copies possible.

Note that the position of the first elevating member 7 changes depending on the number of copy sheets prepared in the paper tray 2, but it can be placed in any position within the paper feeding range (see Figure 11). In order to maintain the extended state, the rear surface 67 of the cam 60 is flat in the vertical direction over a certain distance.

As the first elevating member 7 further descends, the tip of the swing lever 16 is rotated upward by the copy paper, and the roll 64 at the tip of the tray pull-out lever 62 is rotated upward by the copy paper.
reaches the lower end of the cam rear surface 67 and comes off the cam rear surface 67, and the paper tray 2 returns to the rear due to gravity.

When the first elevating member 7 ascends, the tip of the tray pull-out lever 62 collides with the cam 60 as shown by the two-dot chain line in FIG. It is possible to continue.

By adopting such a mechanism, it is possible to pull out the required paper tray and feed the copy paper without using the second elevating member, which is advantageous in terms of cost.

Further, in the above embodiment, there is the trouble of pushing out the paper trays in between before the second elevating member rises and reaches the desired paper tray. The side with 44 is slightly raised and maintained in the horizontal direction by a spring or the like, and when the second elevating member 39 moves up and down, the drag caused by the cam 46 is avoided by swinging the lever 43, thereby eliminating and stopping the paper tray from being pushed out. The projecting piece 45 is made to be able to protrude and retract with respect to the second elevating member 39, and the second elevating member 39
The stop protrusion is depressed until the second elevating member 39 reaches the standby position for the selected paper tray, and when it reaches the standby position, it is projected and the lever 43 is swung when the second elevating member 39 is raised by a certain number of steps d. It is also possible to push out only the required paper tray by restricting the paper tray.

In addition, although the first elevating member 7 was raised and lowered by rotating the screw rod 8, it can be freely inserted and retracted by supplying and discharging fluid to a multistage cylindrical body such as a cylindrical cam mechanism, a pantograph mechanism, or a telescope barrel. The first elevating member 7 may be moved up and down using a fluid expansion/contraction means, a belt mechanism, or the like.

Furthermore, instead of the copy paper 1, a manuscript may be processed as a sheet.

Effects of the Invention In the present invention, only the required sheet storage means can be selectively pulled out or pushed in by simply raising and lowering the conveyance means, so that sheets can be immediately removed from the required sheet storage means. It can transport and feed paper, and does not require a special motor to push and pull out the drawer of the sheet storage means.
Cost reduction can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a side view illustrating an embodiment of a drawer device for sheet storage means according to the present invention, Fig. 2 is a perspective view of its main parts, Fig. 3 is a plan view thereof, and Fig. 4 is a paper tray. A side view of the main parts illustrating the state before pulling out the
FIG. 5 is a side view of the main part with the paper tray pulled out, FIG. 6 is a longitudinal side view of the main part, FIG. 7 is a block diagram of the control system of the embodiment, and FIG. 8 is a flowchart thereof. FIG. 9 is a flowchart of the paper feed preparation subroutine in the same flowchart.
Figure 0 is a flowchart of the position correction subroutine in the flowcharts of Figures 8 and 9;
The figure is a 12th explanatory diagram illustrating the operation of the above embodiment.
The figure is a side view of a main part showing a state in which the paper tray is pulled out in another embodiment, and FIG. 13 is an explanatory diagram of the main part showing just before and after the paper tray is pulled out in the same embodiment. 1... Copy paper, 2... Paper tray, 3... Guide roll, 4... Shelf support, 5... Shelf support member, 6
... Guide rail, 7 ... First elevating member, 8 ...
Screw rod, 9... bearing, 10, 11... bevel gear,
12...Rotating shaft, 13...Step motor, 14
... Bracket, 15 ... Pivot shaft, 16 ... Swing lever, 17 ... Paper feed roll shaft, 18 ... Paper feed roll, 19 ... Pulley, 20 ... Belt, 21 ...
... Drive pulley, 22 ... Paper guide, 23 ... Base protrusion, 24 ... Connection means, 25, 26, 27 ...
...Connection link, 28...Guide chute, 29,
30, 31, 32... Conveyance roll, 33... Paper feed motor, 34... Dry electrophotographic copying machine, 35...
Paper receiving section, 36... Guide rail, 37... Screw rod, 38... Bearing, 39... Second elevating member, 4
0,41...Bevel gear, 42...Rotating shaft, 43
... Lever, 44 ... Roll, 45 ... Stopping piece, 46 ... Cam, 47 ... Cam surface, 50 ... Microcomputer, 51 ... Input interface, 52 ... ROM, 53 ... RAM, 54...
CPU, 55... Output interface, 60...
Cam, 61...cam surface, 62...tray pull-out lever, 63...shaft, 64...roll, 65...weight, 66...stopping protrusion, 67...cam rear surface, C ₁
...Transportation means lift clutch, C ₂ ...Tray drawer clutch, C ₃ ...Paper feed clutch, PD...Paper feed ready indicator, RS...Reflective paper feed completion detector, LS...Limit switch, SE ...Tray selection switch, NE...Copy number setting switch group,
ST... Copy start switch.

Claims (1)

[Scope of Claims] 1. A plurality of support means 5 arranged at required intervals in the vertical direction, a plurality of sheet storage means 2 each supported by the support means so as to be movable back and forth,
A sheet conveying means 18 that moves up and down along the sheet ejection side of the sheet storage means and conveys the uppermost layer of sheets to the sheet ejection side by contacting the sheet storage means. In the paper feeding device, vertically inclined cam members 46 and 60 are attached to each of the sheet storage means, respectively, and a lever means 43 whose tip abuts against the cam member;
62 is pivotally mounted to the conveying means or other elevating means so as to be tiltable, and is provided with restraining means 45 and 66 for restraining the lever means from tilting in one direction. Device.