JPS59203022A - Paper feed cassette - Google Patents

Abstract

PURPOSE:To replenish the paper supply very easily by providing an upper cover of a paper feed cassette detachably overlaid on a paper feed cassette body with paper handling corner snubbers in a paper feeder of a copying machine. CONSTITUTION:In case of supplying paper P to a paper feed tray 1, first paper P is put in a paper feed cassette body. At this time, the paper P is guided by a rib projected on the side wall, so that paper is set only by bringing the trailing end of paper into contact with the rear wall. Secondly, when a paper cassette upper cover 8 with corner snubbers 10 is placed over the paper feed cassette upper cover 8, a pair of corner snubbers 10 are engaged with both corner portions of the leading end of the paper P. In this arrangement, when the paper feed cassette 1 is installed on a copying machine, a bottom plate 5 is urged upward by a spring 7, so that the uppermost surface of the paper 9 is brought into contact with a transport roll 11 in a copying machine. When the transport roll 11 is rotated, the uppermost paper P gets over the corner snubbers 10 to be discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feed cassette in a paper feed device of a copying machine.

Warehouse” C deposit? 11-1- When an automatic paper feeding device such as a photocopying machine uses a paper feeding cassette, it is necessary to reliably feed the stacked sheets of paper in the paper feeding cassette one by one into the paper feeding machine.

As a means to meet this need, a corner nut for paper flapping that engages the laminated paper was provided in the paper feed cassette, and the same corner nut was used (v = majority). The corner Natsuba method is inexpensive and has stable and reliable paper-spreading performance.
It is equal σ] T-.

Conventional paper feed cassette 01 illustrated in FIGS. 1 and 2
G'i, a tiltable bottom plate 03%' is placed inside the paper feed cassette main body (2), and the bottom plate 03 compression coil springs 04
The upper part is biased upward with a leaf spring, etc. Laminated paper P on the bottom plate 03. Abut against the k1 transport roll 06 with a predetermined pressure at <t, and use a pair of corner nut 05 pivoted on the side wall of the paper feed cassette main body 020 at a tilting mark.
:, is locked to both corners of the front end of Po. Then, when the storage roll ( ) 6 rotates by 1 t, the top layer paper Pa passes over the corner nut 052 which is the paper handling means and is carried out from the paper feeding power cent main body 02 2! However, the top layer paper P. rr+ IIJ paper P below the next layer trying to move along with. Since it is regulated by Cornus Natsuba 05, there is no need to carry it out.

However, in such paper feeding force CERA) 01,
Corner Natsuba 055: j, the control surface on the inner side of the paper feed cassette body 02 Paper had to be loaded into the feeder, making the operation complicated.Also, in some cases, diagonal feeding or double feeding may occur, such as when the leading edge of the paper is protruding from the claw part Q5α of Corner Natsuba 05 on one or both sides. It was causing this.

The present invention relates to an improvement on the paper feed capacity of a copying machine that overcomes these difficulties, and its purpose is to provide a paper feed cassette that allows easy paper replenishment. The point is that it serves 2 servings.

The present invention provides a paper feed cassette in which a paper-separating corner nut is engaged with both front corners of the sheets stacked in a paper feed cassette, and a sheet carrying means is used to carry out the paper Y one by one. In the paper feeding device of Just cover the paper cassette body and you can create laminated paper σ) +f? Both corners of the J end can be engaged with the corner corners.

Embodiment Embodiment (f) of the present invention illustrated in FIGS. 3 to 8 will be described below.

The paper feed cassette l includes a paper feed cassette main body 2, a bottom plate 5 that is tiltably disposed inside the paper feed cassette main body 2, a compression coil spring 7 that urges the bottom plate 5 upward, and a paper feed force sensor).
It consists of a paper feed cassette top cover 8 which is removably attached to the main body 2, a pair of corner snaps 10 attached to the paper feed cassette top cover 8, and the like.

The paper feed cassette main body 2 has a substantially box-shaped σ] shape, and is configured to store a predetermined number of sheets P, and inside the paper feed cassette book 20 on both sides H2a,
The rib 3 protrudes from both sides of the paper P.
rules are becoming regulated. Further, in the vicinity of the rear wall 2h of the paper feed cassette main body 2, an engagement hole 4 is bored inside the both side walls 2α, into which a bottom plate shaft portion 5α is inserted and pivotally supported so that the bottom plate 5 can be tilted freely. .

In addition, the bottom plate 5 is formed from a thin plate having a substantially rectangular shape, and its tip 5h is curved slightly downward, and a bottom plate shaft portion 5α (noted below) is protruded from the side of the gM section. , the bottom plate shaft portion 5α is fitted into the fitting hole 4 by force. Furthermore, a friction member 6 made of, for example, cork is attached to the upper surface of the tip m5h of the bottom plate 5, and the friction member 6 is used to adjust the weight of the paper when there are only a few sheets to one sheet remaining. Its role is to prevent begging.

Therefore, the friction member 6 is made of a material such as cork whose coefficient of friction with respect to the paper is approximately the same as the coefficient of friction between the sheets.

On the other hand, a compression coil spring jig 7 is interposed between the tip 5h of the bottom plate 5 and the paper feeding force center main body 2, and the bottom plate 5 is constantly urged upward by the compression coil spring 7.
The laminated paper P on the bottom plate 5 is brought into contact with a conveyance roll 11 (to be described later) with a predetermined pressure.

As shown in FIGS. 3 to 6, the upper cover 8 of the paper cassette, which is detachably covered with the paper cassette main body 2, has a paper cassette book (both walls 2α in 4-2). Both side walls 8a and rear wall Bb are formed so as to fit into rear wall 2/I, and these side walls 8a, sb
This prevents the paper feed cassette top cover 8 from shifting. Further, a notch 8c is formed in the front part of the upper cover 8 of the paper feed cassette.
1 is inserted.

On the inner surface of the front part of the top cover 8 of the paper feed cassette, a thin plate-like corner nut attachment part 9 is integrally provided and protrudes from the front inner surface of the top cover 8 of the paper feed cassette. QIj414C, there is a gap of the shape 1+5, which is large enough to accommodate both side walls 2α of the paper feed cassette main body 20.

In addition, the pair of corner nuts 10 have a rhinoceros (a flat plate-shaped substrate 10 C1σ as shown in 71).
11 part bending piece 10b and base paper regulating piece 10c and 'l
In addition, a rocking restriction member is provided above the rear end of the board 10α, and a lifting prevention piece 106 is provided above the substantially middle portion of the board 10 (L).

As shown in FIGS. 3 to 6, the corner nut 10 is attached to the corner nut attachment portion 9 on the paper feed cassette M8 with a stopper pin 13. It is supported in a tiltable manner at the center.

Front bending piece 10 in Cornus Natsuba 10
b, the paper regulating piece 10 is brought into contact with the corner of the scraped edge of the paper P.
C is slidable 5 to follow both corners of the upper surface of the uppermost paper P, and the swing regulating piece lOd is brought into contact with the inner surface of the paper feed cassette top cover 8, and a predetermined angle of the corner nut 10 is formed. The above-mentioned downward swinging is regulated, and the lifting prevention piece toe comes into contact with the inner surface of the paper feed cassette top cover 8 in the same manner as the swinging regulating piece lOd, and moves upwards to the corner nut bar 10. lifting is prevented.

Since the embodiments shown in FIGS. 3 to 8 have the grooves as described above, when replenishing paper P to the paper feed cassette 1, first the paper feed Insert paper into the cassette main body 2. At this time, since the image side edge of the paper P is guided by the ribs 3 protruding from both side walls 2a of the paper feed cassette main body 20, the paper P is set only at the rear edge of the paper feed cassette main body 2. This can be done simply by touching 2b.

Next, if the corner nut 10' and the attached paper feed force cellar (upper lid 8 are placed over the paper feed cassette main body 2 in which paper P has already been set, the pair of corner nuts 10 will be used for each paper PL7) @ both ends can be engaged with the part.

At this time, the corner nut 100 is prevented from swinging downward more than necessary by the swing regulating piece 10d, and the corner nut 100 is prevented from floating upward by the floating prevention piece t.
oc prevents J 1t7) Paper feeding power The paper feeding cassette height difference 8σ] can be easily mounted on the main body 2. '
fT:, laminated paper laminated paper force cent main body 2 both 1III
H! ! Since a space is formed between C and 2α by the 11b 3, the corner nut attachment portion 9 and the corner nut 1O are placed in the same space W71, and the device n of the paper feed cassette top cover 8 can be disconnected without any problem.

In this way, when the supply of paper P to the paper feeder cassette 1 is completed, if the paper cassette 1 is installed in the copying machine (not shown), the bottom plate 5 will open as shown in FIG. is biased upward by the compression coil spring 7, so that the top surface of the stacked paper P is transferred to the conveyor roll 1 disposed in the double tile machine.
1 at a predetermined pressure. Therefore, the conveyance roll 11 and the feed roll shaft 12 are set so as not to come into contact with the paper feed cassette 1, and the conveyance roll 11 is inserted into the paper feed cassette l through the notch 8c in the paper feed cassette top cover 8. Ru. Then, when the conveyance roll 11 rotates, the uppermost layer paper P is removed by the corner picker 107, which is a paper separating means.
Paper P in the next layer or below that attempts to move along with the uppermost layer fa P is not carried out because it is regulated by Cornus Natsuba 1o. .At this time, the front bent piece ta at the corner nut 1o is placed in the direction in which the top layer of paper P is conveyed.
To prevent the paper feed cassette top cover 80 from sliding on the paper feed cassette main body 2 even if b is pressed,
σ] Rear IJ 8 b KaiQ All; It is attached to the rear wall 2b of the cassette body 2.

In this way, in this embodiment, paper Pσ] replenishment edge 1
．． : There is no need to lift the ff-1-snat Q and engage the corner snaps on both front corners of +4LAtP.
By simply replenishing the paper feed cassette main body 2 with paper P and placing the paper feed cassette top lid 8 on, the corner snap bar 10 attached to the paper feed cassette top lid 8 can be engaged with the edges 11 of the paper P on both ends. Therefore, the operation when replenishing paper becomes extremely easy.

In the embodiments shown in FIGS. 3 to 8, the upper lid 8 of the paper cassette is provided with a corner nut + (1'< fil), but as shown in FIGS. In the @ part of 8, -1 corner Natsuba 1
0 may be formed. That is, the front bent piece 10 b and the paper regulating piece to cy of the corner nut 1o are integrally attached to the upper lid 8 of the paper feed cassette. Paper P by Oc
It may be engaged with.

Also in this embodiment, as shown in FIGS. 3 to 8,
- It is possible to obtain the same effects as in the embodiment, and since it can be integrally molded with the upper cover 8 of the paper feed cassette, it is possible to reduce the manufacturing cost of the entire paper feed cassette.

1. As is clear from the above description of the embodiments, the present invention has a corner nut for handling paper attached to the top cover of the paper cassette, which can be freely covered over the main body of the paper cassette. Just by storing paper in the paper cassette body and covering the top cover of the paper feed cassette, the corner tabs can be engaged with both corners of the paper, making paper replenishment extremely easy. .

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional paper feed cassette, Fig. 2 is a vertical cross-sectional view thereof, and Fig. 3 is a paper feed cassette according to the present invention.
' ] A perspective view illustrating one embodiment, FIG. 4 is a perspective view of the same embodiment with the top cover of the paper feed cassette opened, FIG. 5 is an enlarged vertical sectional side view of the main parts of the same embodiment, and FIG. An enlarged cross-sectional side view of the main part thereof, No.7 A perspective view illustrating another embodiment, FIG. 10 is an enlarged perspective view showing the inner surface of the upper cover of the paper feed cassette in the same embodiment. 01... paper feed cassette, 2... paper feed cassette Main body, 3... Rib, 4... Engagement hole, 5... Bottom plate, 6
...Friction member, 7...Compression coil spring, 8.
...Paper feed cassette top lid, 9...Corner nutbar attachment part, 10...Corner nutbar, 11...Transportation roll,
12... Conveyance roll shaft, 1:3... Stopping pin. Proxy attorney r+: +! :t Bougai 1 Meikai 1 Zuhen 3z IUD 10 Sha 5 Diagram 1 2 / 7th Eye 8th Figure

Claims (1)

[Claims] Paper stacked in the paper feed cassette σ) Engage the paper cutting corner nuts at both corners of the front end, and use the paper ejecting means to
In the paper feeding device of a photocopier that outputs PI, there is a paper feeding cassette top cover that is removably attached to the main body of the paper feeding cassette. paper cassette