JPH0358313B2 - - Google Patents

Description

Detailed Description of the Invention - Field of Industrial Application - The present invention relates to a stacking device for media paper in input/output devices that use paper as an information recording medium, such as printers and card readers of information processing systems. The present invention relates to a drive mechanism for the paper ejection roller and the switching guide in a stacking device having a paper ejection roller that ejects processed sheets to a stacker and a switching guide that changes the ejection direction of the paper.

-Prior art- Fig. 6 shows an example of a conventional stacking device for a stand-alone printer having an automatic feeding function for paper sheets. 2 completed cut sheets 8
The stackers 3 and 4 are distributed and discharged. Here, 41 and 42 are paper ejection rollers that are pivoted to a machine frame (not shown), 9 is a switching guide that is pivotally supported on the shaft of the paper ejection roller 41, 43 is a solenoid that swings and drives the switching guide 9, and 44 is a solenoid that swings and drives the switching guide 9. A rod 7 pivotally connects the switching guide 9 and the solenoid 43; 7 is an electric motor that rotationally drives the paper ejection rollers 41 and 42;
5, 16, 17a, and 18a are gears that transmit the rotation of the electric motor 7 to the paper discharge rollers 41 and 42.

The paper ejection rollers 41 and 42 are rotationally driven in the direction of arrow A in the figure, and the cut sheet that has fallen between the guides 5 and 6 is guided by the switching guide 9 into contact with the upper paper ejection roller 41, and is guided to the upper paper ejection roller 41. The frictional driving force of the roller 41 sends it out to the stacker 3 above. When the switching guide 9 is swung by the solenoid 43 as shown by the imaginary line 9a in FIG. The sheet is guided between the paper ejection roller 42 and sent out to the stacker 4 below by the frictional driving force of the paper ejection roller 42 .

-Problems to be Solved by the Invention- In such a conventional stack device, the solenoid 43 is used to swing the switching guide 9.
3 generates a large impact sound, and even if a sound absorbing material is provided to absorb the noise, there is a problem in that the noise cannot be avoided from leaking to the outside from the paper ejection port. Furthermore, in the conventional stacking device, the paper is stacked on the paper ejection roller 4 by the guides 9 and 10.
1 and 42, it was difficult for the falling paper to be caught by the paper ejection rollers 41 and 42, and there was also a drawback that the paper was not fed smoothly.

- Means for Solving the Problems - The present invention has been made to solve the above problems, and the switching guide 9 is switched using the reversing operation of the electric motor 7 for driving the paper ejection roller. It is something. Further using the reference numerals of the illustrated embodiment, the media sheet stacking device of the present invention has a sheet discharge roller 1 and/or 2 that rotates in one direction and a switching guide 9 that changes the sheet path by a swinging motion. In the media sheet stacking device, the rotational drive system of the paper ejection roller and the switching guide are connected via a one-way clutch 21 and a rotation-swinging mechanism 19, and the reversal rotation of the paper ejection roller driving electric motor 7 It is characterized by switching the switching guide 9.

-Function- With the above configuration, the switching guide 9 that changes the ejection route of the medium paper can be switched by the paper ejection roller drive electric motor 7, so there is no need to separately provide a drive source for switching the switching guide 9.
Furthermore, since the switching of the switching guide 9 is performed by the electric motor 7, the operation is smooth and no impact noise is generated, and the device can be operated quietly.

-Embodiment- Figures 1 to 3 show the first embodiment of the present invention.
FIGS. 4 and 5 show a second embodiment.

In the figure, 1 and 2 are paper discharge rollers, 3 and 4 are stackers fixed or detachably attached to a machine frame (not shown), 5 and 6 are guides fixed to the machine frame, and 7 is a paper discharge roller drive It is an electric motor for Paper ejection rollers 1 and 2 are a pair of rollers 1 that are driven into contact with each other.
a, 1b and 2a, 2b, guides 5, 6
The paper 8 falling from above is moved to rollers 1a and 1.
It is provided to guide the user between 9 is a switching guide; 10 is a fixed guide; the switching guide 9 is pivotally connected to the shaft 12a of the roller 1a by a bracket 11, and is provided to guide the paper sent out from the paper discharge roller 1 to the stacker 3; The fixed guide 10 is provided so as to guide the paper 8 to the paper ejection roller 2 and guide the paper sent out from the paper ejection roller 2 to the stacker 4 when the switching guide 9 is retracted. 14 is a through hole provided in the fixed guide 10 to ensure contact between the rollers 2a and 2b.

As the electric motor 7, an AC or DC motor is used, and a gear 15 is fixed to the output shaft of the electric motor 7.
The gear 15 meshes with an intermediate gear 16 that is pivoted to a machine frame (not shown), and the intermediate gear 16 is connected to the roller 1.
It meshes with gears 17a and 18a fixed to the shaft 12a of roller 2a and the shaft 13a of roller 2a, respectively. Further, the gear 17a meshes with a gear 17b fixed to the shaft 12b of the roller 1b, and the gear 18a meshes with a gear 18b fixed to the shaft 13b of the roller 2b.
The structure is such that both 2a and 2b are driven.

1 to 3 show an embodiment using a cam mechanism as the rotation-swing mechanism 19, in which a cam 22 is installed on the shaft 20 of the intermediate gear 16 via a one-way clutch 21. . one way clutch 2
1 is when the electric motor 7 rotates in the opposite direction, that is,
The intermediate gear 16 is mounted so as to transmit the rotation B to the cam 22 when the intermediate gear 16 rotates in the second and third directions B shown in the figure, and when the paper ejection rollers 1 and 2 are rotationally driven in the normal rotation direction, That is, the intermediate gear 16 is
When rotating in the direction A shown in the figure, the rotation A is not transmitted to the cam 22. Both operating end portions of the cam 22, ie, a portion a with the largest diameter and a portion b with the smallest diameter, are arcuate surfaces.

23 is a cam follower pivotally connected to the machine frame (not shown) by a pin 24, 25 is a crank lever pivotally connected to the machine frame by a pin 26, and 27 is a tension spring stretched between the crank lever 25 and the machine frame. , one end 28 of the cam follower 23 is in contact with the cam 22 by the biasing force of the spring 27, and the cam follower 23
The elongated hole 29 provided at the other end is loosely connected to a pin 30 installed at one end of the crank lever 25, and the pin 31 installed at the other end of the crank lever 25 is inserted into the tip of the lever extending from the bracket 11 of the switching guide. It is loosely connected to the fork 32. The cam 22 is
Both operating end portions of the cam 22, that is, a portion 22a where the diameter is the largest and a portion 22b where the diameter is the smallest
is a circular arc surface, so that even if an error occurs in the rotation angle of the cam 22, the cam follower 23 and the switching guide 9 linked thereto remain at a constant position.

Next, the operation of the switching guide 9 in the above configuration will be explained with reference to FIGS. 2 and 3.

When the electric motor 7 is rotating in the normal direction, the rotation A of the intermediate gear is not transmitted to the cam 22, and therefore the switching guide 9 is held in the state shown in FIG. 2 or 3, and the falling paper 8 is is guided to the stacker 3 via the paper discharge roller 1 (FIG. 2) or to the stacker 4 via the paper discharge rollers 1 and 2 (FIG. 3).

From the state shown in FIG. 2 or 3, when the electric motor 7 is reversed and the intermediate gear 16 is rotated half a turn in the direction of arrow B, the rotation is transmitted to the cam 22 and switched via the cam follower 23 and the crank lever 25. By swinging the guide 9 from the state shown in FIG. 2 to the state shown in FIG. 3, or from the state shown in FIG. 3 to the state shown in FIG. 2, the ejection path of the paper 8 is changed. In order to quickly change the discharge route, it is preferable to use an AC or DC motor as the electric motor 7.
By forming the cam 22 into an arcuate surface, the angular error of the cam 22 can be prevented from affecting the operating position of the switching guide 9, and the control system for the electric motor 7 can also be simplified.

The second embodiment shown in FIGS. 4 and 5 uses a crank mechanism as the rotation-swing mechanism 19. In FIGS. 4 and 5, 21 is a one-way clutch mounted in the same manner as in the first embodiment, 33 is a crank mounted on the output side of the clutch 21, and 34 is a pin 35 implanted at the tip of the crank 33. This is a link that pivotally connects the pin 36 installed at the tip of the lever extending from the bracket 11 of the switching guide.

With the above configuration, the electric motor 7
The switching guide 9 swings via the one-way clutch 21, the crank 33, and the link 34 due to the reverse drive, and the ejection path of the paper 8 is switched. In the second embodiment, it is necessary to control the rotation angle of the cam 22 more accurately than in the first embodiment, so it takes more time to convert the discharge path than in the first embodiment. The control system for the electric motor 7 is also more complicated than that of the first embodiment.

- Effects of the invention - As explained above, according to the apparatus of the present invention,
The paper ejection route can be changed by the electric motor for driving the paper ejection roller. Therefore, there is no need for a special drive source to swing the switching guide, which not only simplifies the structure of the device. Since the switching guide is smoothly oscillated by the electric motor, there is no impact noise that occurs when switching using a solenoid or the like, and the device can be operated smoothly and quietly. Furthermore, as shown in the illustrated embodiment, if the paper ejection roller is configured with a pair of rollers that are driven into contact with each other, it is ensured that the paper is caught firmly in the paper ejection roller, and the paper can be ejected more smoothly. You will be able to do things.

[Brief explanation of drawings]

1 to 3 are views showing a first embodiment of the present invention, with FIG. 1 being a perspective view, and FIGS. 2 and 3 being side views showing the operation. Figures 4 and 5 are
FIG. 6 is a side view showing the operation of the embodiment, and FIG. 6 is a perspective view showing the conventional device. In the figure, 1 and 2 are paper ejection rollers, 3 and 4 are stackers, 7 is an electric motor, 8 is paper, 9 is a switching guide, 1
0 is a fixed guide, 11 is a bracket, 16 is an intermediate gear, 19 is a rotation-swing mechanism, 21 is a one-way clutch, 22 is a cam, 23 is a cam follower, 25 is a crank lever, 27 is a tension spring, 33 is a crank, 34 is a link.

Claims (1)

[Scope of Claims] 1. In a media sheet stacking device having a paper ejection roller that rotates in one direction and a switching guide that changes the paper path by a swinging motion, the rotational drive system of the paper ejection roller and the switching guide are integrated. A stacking device for media sheets, which is connected through a directional clutch and a rotation-swing mechanism, and is characterized in that the switching guide is switched by reverse rotation of an electric motor for driving a discharge roller. 2. The media stacking device according to claim 1, wherein the rotation-swinging mechanism is a cam mechanism having a cam having both working end portions having arcuate surfaces.