JPS5820602Y2 - Paper feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device included in, for example, an electronic copying machine, and particularly relates to an improvement in a paper replenishment structure.

For example, an electronic copying machine is provided with a paper feeding device that accommodates copy paper, and is capable of feeding copy paper one by one onto a conveyance path in response to a paper feed command.

A conventional paper feeding device of this type is shown in FIG.

That is, a is a box body, b is an intermediate plate that supports the copy paper p in a stacked manner, C is a spring body that elastically supports this intermediate plate (b), and d is hooked by its own weight to both ends of the uppermost copy paper p. separation claws (only one shown).

Furthermore, a feed roller (not shown) is brought into rolling contact with the uppermost copy sheet p.

Then, when the paper feed roller rotates, the topmost copy paper p is fed out, and at this time, the separation claw d curves both sides of the leading edge of the copy paper p to form a gap with the next copy paper p, thereby preventing double copying. It is supposed to be done.

By the way, once all the copy sheets p on the intermediate plate b have been fed, it is necessary to replenish the copy sheets p.

At this time, the separating claw d is displaced so as to come into contact with the intermediate plate b due to its own weight, as shown by the two-dot chain line in the figure.

When replenishing the copy paper p, the separation claw d naturally gets in the way, so it is artificially lifted and held, and the separation claw d and the intermediate play)
Copy paper p must be inserted between paper and b.

However, if the person replenishing the copy paper p holds it with one hand,
The separation claws d on both sides of the box body a cannot be lifted and held at the same time, but only one of them will be lifted.

For this reason, the copy paper p must be forcibly bent before being inserted, which is very troublesome, and there are also disadvantages such as the stacking alignment of the copy paper p being disrupted during this insertion, which is likely to cause a jam.

The present invention was made with attention to the above circumstances, and its purpose is to have a relatively simple structure, but to
It is an object of the present invention to provide a paper feeding device that can be easily replenished without disrupting the stacked state of paper.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

FIG. 2 shows a state in which the paper feeding device is attached to the main body A of the electronic copying machine, which is a predetermined paper feeding site.

That is, numeral 1 in the figure is a box whose top surface is open and a paper feeding notch 2 is provided at the upper end of one side, which is the feeding side.

At the bottom of this box body 1, there are guide recesses 3 on the supply side and the non-supply side.
, 4 are integrally provided.

Coiled compression springs 5, 5, which are spring bodies, are inserted into the respective guide recesses 3, 4, and their upper ends protrude from the bottom to elastically support the intermediate plate 6.

A freely rotatable paper feed roller γ connected to a drive source (not shown) rolls into contact with the uppermost layer of the copy paper p.

In other words, the compression springs 5, 5 urge the copy paper p to roll against the paper feed roller 7 via the intermediate plate 6.

One end portion of an arm-shaped separating claw 8 (only one of which is shown) is rotatably supported on both sides of the box body 1.

A claw portion 8a formed at the other end of the separating claw 8, that is, on the paper feeding side, engages with the corner of the uppermost copy sheet p on the feeding side, by using its own weight.

On the other hand, a guide tube 9 that projects into the inner diameter of the compression spring 5 is integrally provided within the guide recess 3 on the feed side.

This guide cylinder 9 has a shaft 10 which is a holding body.
are fitted to be slidable in the vertical direction.

The total length of the shaft 10 is longer than the guide tube 9,
A pin 11 provided near the upper end of the guide tube 9 engages with the upper edge of the guide tube 9 .

Therefore, the upper and lower ends of the shaft 10 protrude from the upper and lower edges of the guide tube 9, respectively.

Note that there is a through hole 1 in the intermediate plate 6 at a position facing the shaft 10.
2 is bored, and although the shaft 10 does not come into contact with the intermediate plate 6, there is a gap between them in this paper feeding state.

The paper feeding device configured in this manner is detachably attached to the electronic copying machine main body A.

The copying machine main body A includes a gripping tool 20 bent into a substantially U-shape for holding both sides of the box 1, and a gripping tool 20 for positioning the end surface of the feeding side of the box 1 and for escaping the shaft 10. It consists of a stopper metal fitting 22 which has a notch 21 and is bent into an abbreviated shape that supports the guide recess 3.

The end of the box 1 on the side opposite to the paper feed side protrudes from the main body A of the copying machine.

By setting a document in the main body A of the electronic copying machine and pressing a copy button (not shown), a predetermined copying operation is performed and the paper feed row 27 is rotated at the appropriate timing.

The uppermost copy sheet p is fed in the direction of the arrow in the figure and sent into a conveyance path (not shown).

As the copy paper p is fed, the weight applied to the intermediate plate 6 is reduced, so that the uppermost copy paper p is pushed up by the compression springs 5, 5 and can always be brought into contact with the paper feed roller T with a constant pressure.

When all the copy sheets p have been fed, the claw portion 8a side of the separation claw 8 comes into contact with the intermediate plate 6, and a detector (not shown) detects this, and the paper replenishment lamp lights up.

Therefore, it is necessary to replenish copy paper p.

That is, the box 1 is pulled out from the copying machine main body A, and as shown in FIG.
Place it on desk B with (.

At this time, the lower end of the shaft 10 protruding from the box 1 comes into contact with the mounting surface C of the desk B, and the guide tube 9 is fitted onto the shaft 10.

The upper end of the shaft 10 is inserted into the through hole 12 of the intermediate plate 6.

When the box 1 is completely placed on the placement surface C, that is, when the bottom surfaces of the guide recesses 3 and 4 come into contact with the placement surface C,
The upper end of the shaft 10 projects onto the intermediate plate 6 through the through hole 12 and pushes up the separating claw 8.

Therefore, a sufficient gap is formed between the claw portion 8a of the separation claw 8 and the intermediate plate 6.

The person replenishing the stack of copy sheets P to be replenished can place both hands on the stack of copy sheets P and insert one end thereof between the claw portion 8a and the intermediate plate 6 while maintaining the stacked alignment state, and place the stack on the intermediate plate 6. can.

After replenishing the copy paper p, lift the box 1 and the shaft 10
falls under its own weight, and the pin 11 catches on the upper edge of the guide tube 9.

Therefore, the upward biasing force of the shaft 10 against the separation claw 8 is removed, and the claw portion 8a engages the uppermost copy sheet p with its own weight.

Although the above embodiment has been described as a device that feeds copy sheets, it goes without saying that the present invention is not limited to this and can be applied to any device that sequentially feeds other paper sheets.

Further, although a shaft is used as the holding body 10, the present invention is not limited to this. For example, a cam or the like may be used to push up the separation claw 8, as long as it can perform the specified operation reliably. good.

As explained above, according to the present invention, there is a box body which is detachably attached to a predetermined paper feeding area and which accommodates stacked papers and which can sequentially feed paper from the topmost one, and a paper feeding side of the box body. There is an arm-shaped separation claw that is swingable and has a claw on the paper feed side, and the claw engages the topmost sheet of paper with its own weight to prevent the paper from taking two sheets. It is movable and can be protruded and retracted from the bottom of the box, and when the box is set in a designated paper feeding area, it hangs from the box by its own weight, and the box is moved to a non-paper feeding area to replenish paper. Since the holder is provided with a holder that comes into contact with the non-paper feeding area when placed and projects into the box body to push up the separating claw, when replenishing paper, the separating claw can be pushed up simply by placing the box in the non-paper feeding area. It can be held and a sufficient gap is formed between it and the bottom of the box so that paper can be inserted.

Therefore, the sheets can be easily replenished without disturbing the stacked alignment of the sheets, and jamming can be reliably prevented.

Moreover, when the box body is set at a predetermined paper feeding position, the holding body automatically separates from the separating claws and the biasing force can be removed.Although the structure is extremely simple, handling and operability can be improved and the present invention can be provided at a low price.

Furthermore, since the arm-shaped separating claw is made swingable, the positioning of the claw part can be performed accurately and the separation claw will not fall due to its own weight.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a paper feeding device showing a conventional example of the present invention, FIGS. 2 and 3 are paper feeding devices showing an embodiment of the present invention, and FIG. FIG. 3 is a vertical cross-sectional view showing the sheet feeding device placed in a non-paper feeding portion. p...Paper (copy paper), 1...Box body, 8...Separation claw, 8a...Claw part, A...Paper feeding part (electronic copying machine main body), C...Non Paper feeding part (desk), 10... holding body (shaft).

Claims (1)

[Scope of utility model registration request] A box body that is detachably attached to a predetermined paper feeding area and accommodates stacked papers and can feed the stacked papers sequentially from the topmost paper; a paper feeding side is swingably provided on the box body; an arm-shaped separation claw for preventing double-sheet removal, which has a claw part, and the claw part engages the uppermost paper by its own weight; It is freely installed, and when the box is set in a designated paper feeding area, it hangs from the box due to its own weight, and when the box is placed in a non-paper feeding area to replenish paper, it comes into contact with the non-paper feeding area. and a holder that protrudes into the box body and pushes up the separating claw.