JPH02103164A - Automatic feeder - Google Patents

Abstract

PURPOSE:To obtain an automatic feeder also simple from a mechanistic aspect and requiring no special control by constituting one end of a delivery roller of a forward rotary clutch transmitting only the forward rotary deriving of a gear and the other end thereof of a reversal preventing clutch. CONSTITUTION:The recording paper 2 discharged from the discharge port of a recording apparatus after the finish of recording obtains feed force between a delivery roller 11 and a delivery press roller 12 to be received in a stacker 13. A delivery gear 19 performing driving transmission from a drive source is mounted to the delivery roller 11 on the left-hand side thereof through a forward rotary clutch 20 and the one hook of the forward rotary clutch 20 is provided to the slit part of the delivery gear 19 to transmit only rotation in n E-direction. The one hook of a reversal preventing clutch 21 is hooked with the fixing member 22 provided to the case of an automatic feeder to prevent rotation in an F-direction. That is, the delivery roller 11 transmits only the rotation in the E-direction of the delivery gear 19 to deliver the recording paper in a delivery direction and prevents the involution of the recording paper in the recording apparatus at the time of the rotation in a D-direcetion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic paper feeder that feeds recording paper one sheet at a time to a recording apparatus.

[Conventional technology 1] As shown in FIGS. 5(a) and 5(b), a conventional automatic paper feeder has a main drive gear in order to prevent the paper ejection roller 24 fixed to the driven gear 23 from rotating in both directions. 24 to driven gear 23
A swing gear 26 was used to transmit the drive to. As shown in FIG. 5(a), when the main gear 25 rotates counterclockwise, the swing gear 26 swings in the direction B in the figure, and the paper discharge roller 24 is driven to rotate counterclockwise via the driven gear 23. 5(b), that is, when the main gear 25 rotates clockwise, the oscillating gear 26 oscillates in the C direction and does not transmit drive to the driven gear 23. Ta.

Problems to be Solved by the Invention However, in the prior art described above, it is necessary to install the swing gear 26, and 4! ! This becomes horizontally complicated and leads to increased costs, and special control is also required.

Therefore, an object of the present invention is to obtain an automatic paper feeder that is mechanically simple and does not require any special control. li%! Means for Solving Problem I] The automatic paper feeder of the present invention has one end of the paper ejection roller for ejecting the recording paper, a normal rotation clutch that transmits only the normal rotation drive of the gear, and the other end of the paper ejection roller. It is characterized by comprising an anti-reverse clutch that prevents reverse rotation.

[Examples] Examples of the present invention will be described below based on the drawings. In FIG. 2 showing the configuration of an automatic paper feeder, recording paper 2 stored in a paper magazine 1 is rotated by a motor (not shown) that is pressed against a paper feed belt 5 by a load spring 4 via a bottom plate 3. The paper feed belt 5, which rotates clockwise following the driven paper feed shaft 6, starts conveying the recording paper 2. A plurality of sheets of recording paper 2 are conveyed at the same time due to various conditions during conveyance, and the recording paper 2 is fixed on the paper feed belt 5 by the barerator spring 7, and the recording paper 2 that has finished recording in the recording device and is ejected from the recording device ejection opening is ejected. A paper ejection roller 11 made of a rubber material that is guided by a paper cover 10 and rotates clockwise in synchronization with the paper conveying means of the recorder, and a paper ejection presser roller that is rotatably supported at the tip of the paper ejection cover 10. 12 and is stored in the stacker 13. The paper ejection cover 11 is rotatable around a fulcrum A, and the paper ejection presser roller 12 has an appropriate weight and generates a pressing force using its own weight, so that the paper ejection cover 11 is able to rotate freely around a fulcrum A, and the paper ejection pressing roller 12 has an appropriate weight and generates a pressing force using its own weight. It is possible to respond to various needs such as stiffness and rigidity. Also, depending on the type of recording paper 2, the paper ejection roller 1
1 and the discharge presser roller 12 may be in contact with each other or may be fixed with a certain gap between them.

Further, as shown in FIG.
When the paper is pulled out from the main body, it is pressed by the Frixion Seven Palator 8 and pinches the recording paper that comes out, but it is separated into one sheet on the Frixion Seven Palator 8 which is pressed by the Paper Clamper 14 and recorded from the opening of the case 9. The paper feeding process is explained in Fig. 3, where the friction coefficient between the paper feed belt 5 and the front side of the recording paper 2 is μl, ゛a+friction coefficient between the front and back sides of the recording paper 2 is μl,゛If the coefficient of friction between the back side of the recording paper 2 and the seventh pallet 8 is μ3, the pressing force of the seventh pallet 8 is N, and the paper feeding direction is positive, then the conveyance force of the topmost recording paper 2 is .

The resistance force that stops the second sheet of recording paper 2 is (μm-μ
l )xN>O, -(μ3-μ2)XN<O. In addition, when only one sheet of recording paper 2 is conveyed from the paper magazine 1 to the friction seventh pallet 8,
Paper can be fed on the friction 7 pallet 8 (μl-
μ3) From 0 or more requiring the relationship XN>0, μm>μ
By maintaining the relationship 3>μl, it is possible to separate and feed one sheet of recording paper. Here, the paper feed belt 5 and the FRIXILON 7 pallet 8 are made of a rubber material that maintains the relationship μl>μ3>μl, with the former having a higher coefficient of friction than the latter. Press line a to remove the recording paper. Remove the recording paper 2 remaining inside the paper magazine 1 by lifting it from below the recording paper exchange hole 17.
This will be confirmed by

Next, FIG. 1 shows a partial detailed view of the paper ejection roller 1, which is a feature of the present invention. On the left side of the paper ejection roller 1 in the figure, there is a paper ejection gear 19 that transmits drive from a drive source. Drive is transmitted from 19 to the paper discharge roller 1, and the forward rotation clutch 2
Attached via 0. One hook of the normal rotation clutch 20 is hooked to the slit portion of the paper ejection gear 19, as seen in the E direction in the figure.

It only conveys the rotation. Further, one hook of the anti-reverse clutch 21 is hooked to a fixing member 22 provided on the case of the automatic paper feeder to prevent rotation in the direction shown in the figure. In other words, this paper ejection roller 1 transmits only the rotation of the paper ejection gear 19 in the E direction in the figure, and discharges the recording paper from the recording device in the ejection direction in the figure. This prevents paper from getting caught in the recording device.

Effects of the Invention As described above, according to the present invention, it is possible to control the rotational direction of the paper ejection roller with a simple structure in which clutches are provided on both sides of the paper ejection roller. In addition, there is no need for a complicated mechanism such as a swing gear or control as in the past, making it advantageous in terms of cost.

[Brief explanation of drawings]

Fig. i is a partial detailed view of the automatic paper feeder according to the present invention;
3 is an explanatory diagram of the paper feeding process of the automatic paper feeder according to the present invention, FIG. 4 is a partial detailed diagram of the automatic paper feeder according to the present invention, and FIG. The figure is a schematic diagram of the prior art. 1...Paper magazine 2...Recording paper 5...Paper feed belt 17F bag roller, 22Orchid book V000D figure Frixi day 7 Palator Paper ejection roller Forward rotation clutch Reverse rotation prevention clutch Applicant: Seiko Epson Co., Ltd. Agent Patent attorney Kizobe Suzuki and one other person Feeper 7 engine θf 2nzeno ζ 74 Go to 2C-Clan 1 to Figure 2- Iguichima h"'jin 75 Fu-nhu snake 7 paperman n' nozo 2 otsurei Zhu policeman 5 bell/huan belt 3 figure 4 figure 23 capture ■ I (al (b) figure 5

Claims (1)

[Scope of Claims] An automatic paper feeder for feeding recording paper one sheet at a time to a recording device, characterized in that a paper ejection roller for ejecting the recording paper has the following configuration. a) One end of the paper ejection roller is a forward rotation clutch that transmits only rotation of a gear in the paper ejection direction (hereinafter referred to as normal rotation); b) One end of the paper ejection roller is a gear that rotates in a direction opposite to the paper ejection direction of the paper ejection roller. A reverse rotation prevention clutch that prevents directional rotation (hereinafter referred to as reverse rotation).