JPH03236981A - Paper pressing apparatus - Google Patents

Abstract

PURPOSE:To automatically open and close a bail roller only by rotating a platen by providing specific gear constitution. CONSTITUTION:When a bail roller 6 is closed, a platen 7 is rotated and a drive gear 3 is rotated through a platen gear 1 and LF gears 2a, 2b. Whereupon, a sector pinion 8 is also rotated and a bail open gear 5 is rotated through an idle gear 4 and the bail arm 11 fixed to the gear 5 is revolved and the bail roller 6 is separated from the platen 7. When the bail roller 6 is opened and the platen 7 is rotated, the drive gear 3 is rotated and a sector gear 9 is meshed with a bail closed gear 10 to close the bail arm 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper holding device for a printer device, and more particularly to a paper holding device that automatically opens and closes a bail roller serving as a paper holding device when sucking paper. .

[Conventional technology]

Conventional paper holding devices for printers include those in which an electromagnet is attached to the bail arm that supports the bail roller that holds the paper, and the bell roller is opened and closed by the operation of the electromagnet, or the paper holding device uses power from a gear in the paper feeding system. A configuration is used in which the information is transmitted to a cam, and the opening and closing operations of the bail air are performed by the operation of the cam.

[Problem to be solved by the invention]

The paper holding device of the conventional printer device as described above is
The former method, in which the bail roller is operated by an electromagnet, has the disadvantage that it cannot be used in low-cost printers because of its high cost. Furthermore, the latter mechanism that transmits the power of the gears of the sheet feeding system to the heil roller via a cam has a drawback in that the operator cannot arbitrarily hold the bale roller with his/her hand to perform opening/closing operations.

[Means to solve the problem]

The paper holding device of the printer device of the present invention includes a drive gear to which driving force is transmitted from a gear of a paper feeding system, a sector gear having a partial tooth profile fixed to a rotation shaft of the drive gear, and a rotation shaft of the drive gear. a sector pinion fixed to the sector pinion, the sector pinion having a partial tooth profile shifted in phase with respect to the sector gear, and mounted at a position shifted in the axial direction with respect to the sector gear; and an idle gear to which power is transmitted from the sector pinion. , a bail open gear to which rotational motion is transmitted from the sector gear, a bail open gear to which rotational motion is transmitted from the idle gear and fixed to the rotating shaft of the bail closed gear, the hail closed gear and the bail. It includes a bell arm that moves integrally with an open gear, and a hail roller supported at the tip of the bail arm.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a stop view showing a closed state of the bail roller according to an embodiment of the present invention.

As shown in FIG. 1, when the platen 7 rotates, the LF carrier 2a is moved from the platen gear 1 fixed on the shaft of the platen 7.
and 2N), power is transmitted to the drive gear 3 and rotates. As a result, the sector pinion 8 fixed to the rotating shaft of the drive gear 3 also rotates together with the drive gear 3, and this rotation is transmitted to the bail open gear 5 via the idle gear 4.

When the bail open gear 5 rotates, the bail arm 1 fixed thereto is rotated, and the bail roller 6 supported at its tip is separated from the platen 7.

FIG. 2 is a front view showing the embodiment of FIG. 1 when the veil is open.

In FIG. 2, the rotation of the platen gear 1 transmits power to the drive gear 3 via the LP gears 2a and 2b. A sector gear 9 fixed to the rotating shaft of the drive gear 3 meshes with the bail closed gear 1o, and closes the bail arm 11 fixed to the bail closed gear 1o.

〔Effect of the invention〕

As described above, the paper holding device of the printer device of the present invention has the advantage that there is no need to use expensive parts such as electromagnets, and paper holding can be performed automatically using only a combination of gears. Furthermore, by transmitting power only by gears without using a cam, the operator can open and close the bale roller manually.

FIG.

1...Platen gear, 2a/2b...L
F gear, 3... Drive gear, 4... Idle gear, 5... Bale open gear, 6...
... Bale roller, 7... Platen, 8...
...Sector pinion, 9...Sector gear, 10
・・・・・・Hale closed gear, 11・・・・・・
veil arm.

Claims (1)

[Claims] A drive gear to which driving force is transmitted from the paper feed system gear,
a sector gear having a partial tooth profile fixed to the rotation shaft of the drive gear; a sector gear fixed to the rotation shaft of the drive gear and having a partial tooth profile shifted in phase with respect to the sector gear; a sector pinion installed at a position shifted in the direction; an idle gear to which power is transmitted from the sector pinion; a veil closed gear to which rotational motion is transmitted from the sector gear; and a bail closed gear to which rotational motion is transmitted from the idle gear to the A bail open gear fixed to a rotating shaft of the bail closed gear, a bail arm that moves integrally with the bail closed gear and the bail open gear, and a bail roller supported at the tip of the bail arm. A paper holding device for a printer device, comprising: a paper holding device for a printer device.