JPS6056735A - Sheet feeding guide mechanism - Google Patents

Abstract

PURPOSE:To prevent stagnating of a sheet fed along a guide path by automatically restraining bending of a sheet during feeding by downward pressure of a sheet pressing member disposed on a sheet feed guide. CONSTITUTION:One guide 13 out of sheet feeding guides 13, 14 comprises the first inclined portion 13a gently declined, ant the second inclined portion 13b having a steep inclined surface descending therefrom, wherein a sheet pressing member 15 is disposed opposite thereto on the passage side of a corner portion 13c position through a shaft 16. The member 15 has the forward end thereof always brought into slight contact with a guide surface 13 by the dead load or a spring. Though a hopper 3 is positioned behind a hopper 2 so that the distance from a feed roller 7 to a platen 9 is made longer, the roller 7 is rotated clockwise interlocking with the rotation of the platen 9 to feed a sheet 12a along a guide 13a, so that the sheet is advanced under a pressing member 15 and led to the inclined portion 13b by downward pressure resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a paper feed guide that prevents paper being fed into a platen from floating up in an automatic paper feeder used by being attached to an office machine (for example, a printer) having a platen. Regarding the mechanism.

1. An automatic paper feeder is usually attached to a paper supply port on the top of an office machine in order to supply paper (cut paper) to a platen.

On the other hand, in the case of a 2-BIN automatic paper feeder, the distance from the platen to the paper feed hopper, which is located further away from the platen for feeding paper, becomes longer, and the distance from the paper feed hopper to the platen becomes longer. In the device, the paper feeding direction becomes longer in the front and back.

Therefore, in such a case, the paper being fed is likely to be curved and floated, and paper feeding problems are likely to occur as described later.

Purpose In view of the above, the present invention provides a guide path in which the paper feeding distance increases in length in the front and back and descends from the middle, but it is possible to prevent the paper fed along the guide path from stagnation. An object of the present invention is to provide a paper feed guide mechanism.

Configuration Next, the present invention will be explained based on an embodiment shown in the drawings.

FIG. 1 shows, in cross section, the essential parts of an automatic paper feeder 1Effi (B) equipped with a paper feed guide mechanism (A) of the present invention. Note that this automatic paper feeder (B) has a frame between the frame (1) that can be seen on the opposite side and the frame on the front side that is omitted in the cross section.
Paper feed hoppers (2) and (3) and paper output stacker (4)
・The hoppers (2) and (3) have paper feed rollers (6) and
(7) In addition, claw-equipped paper ejection rollers (8) are installed in opposition to each other between the stackers (4) and (5).

The frame (1) has an arm portion (1a) located on the front side (left side in the figure) and extending downward, which is attached to the shaft (10) of the platen (9) of an office machine (for example, a printer) (C). It is configured so that it can be pivoted, and the automatic paper feeder i&(B)
It is designed so that it can be removably placed on the cover (11) of the office machine (C). In addition, (1b) shows a stay installed between both frames, and (1c) is a cover that is placed on the outside of the frame A (] ).

In the above, when the office machine cc) starts operating, the platen (
In conjunction with the forward rotation (clockwise direction in the figure) of 9), one of the paper feed rollers, for example (6), rotates clockwise in the figure, and the paper (
]2) is fed out from the hopper (2) and placed on the platen (
9). (13) and (14) are paper feeding guides, which are attached to the frame (1).

The paper feeding guides (13) and (14) are plate-shaped in this embodiment, and one guide (13) can be gently inclined toward the paper feeding position to the platen (1). It consists of a first sloped part (13a) and a second sloped part (], 3b) which has a steep slope that descends from the first sloped part (13a), and there is a paper restraining member on the path side at a part of the corner (13c) position. (1
5) are arranged opposite to each other via a support shaft (16).

The paper holding member (15) is disposed opposite to the paper feeding guide (13) in the manner shown in FIG.
The tip of 5) lightly touches the guide (13) surface when sliding. In the illustration, the paper holding member (15) is shown in a fork-like configuration, but it may also be in the form of a plate, for example.

The paper feed guide (14) is configured to guide the paper manually fed from the slot 1-shaped manual feed port (5a) provided on the bottom of the stacker (5) to the platen (9). It is provided opposite to the guide (13), and in this embodiment, the paper feeding guide (14) has a substantially vertical shape.

Therefore, when the paper (12) is fed out via the paper feed roller (6), the platen (9) is pulled out from between the friction pad (6a) pressed by the paper feed roller (6).
The paper is sent out as shown by the dashed line in the figure. In this case, the paper feed roller (6) feeds the paper (
12) is in a state where it is fed to the platen (9) in its natural state, and the paper is in a correspondence relationship that allows the paper to be fed without difficulty without going through the paper holding member (15). However, the hopper installed for 2BIN (3) is "1 hopper (2)
), the distance from the paper feed roller (7) position to the platen (9) is longer, and the paper feed guide (13) is placed in the paper feed path. You will need it. (7a) is a friction pad.

The paper feed roller (7) will be rotated in conjunction with the rotation of the platen (9), but in this case, the paper feed roller (6)
The link between the two sides will be canceled. Therefore, the platen (9
) When the paper feed roller (7) rotates clockwise in the illustration, a sheet of paper (12a) can be fed out from between it and the friction pad (7a), and the paper feed roller (12a) can be fed out along the paper feed guide (13). Then, it is sent to the platen (9) as shown by the two-dot chain line in the figure.

In this way, the paper (12a) fed along the paper feed guide (13) first passes along the first slope (], 3a) and passes under the paper holding member (15) while being under pressure from this holding member. Due to the resistance, it is guided toward the second inclined portion (13b).

By the way, in the case of the conventional example in which the paper holding member (work 5) is not provided, as shown in FIG.
12a) moves forward along the first slope (13a), and the leading edge of the paper hits the opposing paper feed guide (14) as shown by reference numeral (1). Next, the paper feed roller (
When the paper (12a) is further fed out by the rotation in step 7),
The paper increases the distortion of upward curvature (18) as shown by the symbol (n), and the leading edge of the paper changes direction downward, and then the leading edge of the paper falls toward the platen (9). For this reason, the leading edge of the paper must be aligned with the paper feed guide (14
) and is difficult to fall downward, resulting in a problem that stable paper feeding cannot be obtained.

Along with this, according to the present invention, a paper feeding guide (13)
is provided with a paper holding member (15) that can appropriately change the direction of the leading edge of the paper being fed downward, and this paper holding member (15)
) If the paper being fed attempts to curve (18) due to the lower pressure of the paper, this curve is automatically suppressed by the lower pressure of the paper holding member (15) as shown in Figure 4. I can do it,
Paper feeding to the platen (9) can be forcibly regulated downward.

Note that the sheets (12) and (12) sent to the platen (9)
a) is printed here and is sent between the paper ejection guides (19) and between the claw-equipped paper ejection rollers (8), and the rotation of the claw-equipped paper ejection rollers (8) and the paper ejection direction selection member. (20) and manually select one of the stackers (4) and (5).
) is discharged within. In the illustrated case, the paper is discharged to the stacker (5) side.

EFFECTS Since the paper feed guide mechanism of the present invention is as described above, when sheets to be fed to the platen are loaded in each hopper at the front and rear positions, and these sheets are sequentially fed to the platen, Even if the paper stocked at a position away from the platen has a mechanism in which it is transferred downward from the middle via a guide with a gently sloped surface, the leading edge of the paper does not receive the downward pressure from the paper holding member. It can be received and transferred accurately to the platen.

Further, according to the present invention, when the leading edge of the paper that has been fed to the position of the paper wrapping around the platen is rolled up by the platen, even if a slip occurs in which the leading edge of the paper is pushed back in the backward direction with respect to the wrapping, This can be accurately prevented by preventing the paper feed from retreating using the paper holding member. Therefore, it is greatly helpful in eliminating misalignment of the paper winding position with respect to the platen.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional explanatory view showing an embodiment of an automatic paper feeder having a paper feed guide mechanism of the present invention, Fig. 2 is a perspective view of the main part, and Fig. 3 is an explanatory view of paper feed of a conventional example. , FIG. 4 is an explanatory diagram of paper feeding according to the present invention. (A)・・・・・・Paper feed guide mechanism (6)・(7)
...Paper feed roller (9) ...Platen (12) (], 2a) ...Paper (]3
)... Paper feed guide (13a)...
...First inclined part (13b) ...Second
Inclined part (13c)... Part of corner (15
)...Paper holding member patent applicant Rico Co., Ltd. - Agent Patent attorney Shunsuke Nakao 11 2nd V! 1 12a Figure 3

Claims (1)

[Claims] The above-mentioned paper feed guide has a first slope portion that guides the paper sent from the paper feed roller toward the platen, and a second slope portion that descends from the first slope portion toward the platen. In a part of the corner of the first slope part and the second slope part,
A paper feed guide mechanism consisting of vertically movable opposing paper holding members that prevent the paper from floating up.