JPH06227696A - Document carrier device - Google Patents

Abstract

PURPOSE:To provide a document carrier device capable of blocking a part of a carrier passage to carry a document and easily and certainly decoding a document head end position in a document setting state without requiring a separate new starting member. CONSTITUTION:A document stopper is furnished with a motor 8 to drive a paper feeding plate 11 pressing a document 10 on a paper feeding roller 9, a gear 5 to rotate by the motor 8 and a member 4 to engage the document stopper 2 and the gear 5 with each other and has a guide 3 to slide in the inside of a document stop member 1 vertically. A drive shaft of the motor 8 is connected to a gear box 7, and in the gear box 7, a plural number of gears are built in so that when the motor 8 drives one cycle a gear 6 to engage with the paper feeding plate 11 and a gear 5 to engaged with the document stopper 2 rotate by 180 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document feeder used for a document feeder such as a facsimile and an electronic filing system.

[0002]

2. Description of the Related Art Conventionally, a document conveying apparatus used for a facsimile, a scanner, etc. has a general structure as shown in FIG. As shown in the figure, a document stop member 101 and a paper feed plate 102 for pressing the document 10 against a paper feed roller 9 are provided, and a motor 8 for driving the paper feed plate 102 is provided. In the original set state, the paper feed plate 102 is set to the paper feed roller 9.
The motor 8 is driven so as to incline in the direction of increasing the distance between
The original 10 is set by pressing the front end of the original 10 against the original stop member 101, and the original stop member 101 itself functions as an original stopper. Further, in the original transport state, the original 1 on the paper feed plate
The motor 8 is driven so that 0 is pressed by the paper feed roller 9, and then the paper feed roller 9 is driven, whereby the set originals 10 are transported one by one over the original stop member 101.

[0003]

In such a conventional document conveying apparatus, even when the document is set as shown in FIG. 4, there is a gap between the document stop member 101 and the conveyance path 106 for conveying the document 10. Original 10 as in the original transport state
Since there is a space where the tip of the
There is a possibility that the leading edge of the document may be set over the document stop member 101. Therefore, the leading end of the document is curled or bent, and the paper is fed and conveyed in that state, which may cause jamming or skew.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and an object of the present invention is to provide an original document feeding device capable of easily and accurately determining the leading edge position of an original document.

[0005]

In order to achieve the above object, the present invention comprises a motor, a gear rotated by the motor, a document stopper on which a part of a document stop member slides up and down, a document stopper and a gear. The document stopper is provided with a rib-shaped guide that guides the slide, and the document stop member has a groove that engages with the guide of the document stopper. The motor is configured to simultaneously drive the paper feed plate and the document stopper via the interlocking means.When the paper feed plate is raised, the document stopper is lowered, and when the paper feed plate is lowered, the document stopper is raised. The drive relationship among the motor, the document stopper, and the paper feed plate is configured.

[0006]

According to the present invention, according to the above-described structure, when the document is set, the motor is driven so that the paper feed plate tilts in the direction to widen the space between the paper feed roller and the document stopper, and the document stopper slides on the document stop member. It projects from the document stop member and a part of the conveyance path is blocked by the document stopper. In the original transport state, the motor is driven so that the original on the paper feed plate is pressed by the paper feed roller, and at the same time, the original stopper slides over the original stop member and is accommodated in the original stop member, and the protruding portion is Disappear.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A document feeder according to an embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3.
As shown in the figure, the original stopper 2 is engaged with the motor 8 that drives the paper feed plate 11 that presses the original 10 against the paper feed roller 9, the gear 5 that is rotated by the motor 8, and the original stopper 2 and the gear 5. The document stop member 1 including
It also has a guide 3 for sliding up and down inside.
The drive shaft of the motor 8 is coupled to a gear box 7 which is an interlocking device, and when the motor 8 is driven for one cycle, the gear box 7 engages with the cam 6 that engages with the paper feed plate 11 and the document stopper 2. So that the gear 5 rotates 180 °,
A plurality of gears 5 are incorporated. Further, the member 4 that engages the document stopper 2 and the gear 5 is coupled to a position away from the center of the gear 5, and the document stopper 2 that engages with the member 4 moves up and down as the gear 5 rotates. It is like this.

In the original set state, the cam 6 engaged with the paper feed plate 11 is tilted in the direction in which the paper feed plate 11 widens the space between the paper feed roller 9 and the original stopper 2. The mating gear 5 is in such a state that the document stopper 2 projects from the document stop member 1.
In this way, since the space between the paper feed plate 11 and the paper feed roller 9 is widened, and the document stopper 2 projects from the document stop member 1 and a part of the conveyance path 13 is blocked, the leading end portion of the document 10 is The document leading edge position is reliably determined without being set beyond the document leading edge position.

When the document is conveyed, the motor 8 is driven to rotate the cam 6 engaged with the sheet feeding plate 11 via the gear box 7 and the gear 5 engaged with the document stopper 2 by 180 °. At this time, the original 10 on the paper feed plate is pressed against the paper feed roller 9, and the original stopper 2 slides inside the original stop member 1 and is accommodated inside the original stop member 1 so that there is no protruding portion. Next, the paper feed roller 9 is driven to feed and convey the original 10.

As described above, according to the document feeder of the embodiment of the present invention, the leading edge position of the document can be easily and accurately determined.

[0011]

As is apparent from the above embodiments, according to the document feeder of the present invention, since the motor for driving the sheet feeding plate for pushing the document against the sheet feeding roller is used, another device is used. There is no need for new starting parts, and at the same time as the motor is driven in the document set state, the document stopper slides inside the document stop member to block a part of the transport path where the document is transported, so that the document leading edge position is secure. Is decided.

[Brief description of drawings]

FIG. 1 is an external perspective view of a document feeder according to an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view showing a document conveyance state in the present embodiment.

FIG. 3 is a plan sectional view showing a document set state in the present embodiment.

FIG. 4 is a plan cross-sectional view showing a member that determines a document leading end position in a conventional document conveying device.

[Explanation of symbols]

 1, 101 document stop member 2 document stopper 3 guide 4 member 5 gear 6 cam 7 gear box 8 motor 9 paper feed roller 10 document

Claims (1)

[Claims] 1. A document feeder for determining the position of the leading edge of a document provided in a paper feed port of a facsimile, a scanner, etc., wherein the document feeder is a motor, a gear rotated by the motor, and a part of a document stop member. Is configured by a document stopper that slides up and down, and a member that engages the document stopper and a gear. The document stopper is provided with a rib-shaped guide that guides the slide. It has a groove that engages with the guide, and the motor drives the paper feed plate and the document stopper at the same time via the interlocking means.When the paper feed plate is raised, the document stopper is lowered and the paper feed plate is lowered. A document conveying device characterized in that the driving relationship between the motor, the document stopper, and the paper feed plate is configured so that the document stopper is raised when the document is stopped.