JPS592035Y2 - Mechanism for holding documents to be sent in facsimile machines, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sending mechanism for a transmission original in a facsimile machine or the like, and particularly relates to a grip structure for inserting a transmission original.

When placing a transmission document on a facsimile machine, it is necessary to set the leading edge of the document immediately in front of the reading position and maintain this state until the document begins to be fed after communication with the receiving side.

For this purpose, there is a method shown in FIG. 1 or 2 as a conventionally commonly used gripping mechanism.

In FIG. 1, light from a light source lamp 2 is illuminated on a transmission original 1 at a reading position A, and the reflected light containing image information is sent to a lens 3.
The main parts of the device which forms an image on the light receiving surface of the image sensor 4 and transmits the output of the image sensing element 4 to the receiving side are shown.

The document is inserted in the direction of the arrow, and the document setting is completed when the leading edge of the document 1 is fed to point A.

This feeding to point A is performed by driving the first feed reroller 5.

That is, when the insertion of a document is detected by a photodetector made of a combination of a light emitting diode 6 and a phototransistor 7,
The first feed roller 5 and the second feed roller 8, which are driven by a motor (not shown), start rotating and reach point B or B.
Depending on the distance from point A to point A and the predetermined feed rate, the timer can be set by a timer or the like, or point B or
The distance from point ' to point A is determined by the specified scanning line (feed pitch)
Count the number and send it to point A.

The first feed roller 5 and the second feed reroller 8 are coupled to rotate synchronously by a timing belt or the like.

This method has disadvantages in that it requires two highly accurate feed rollers and is expensive because it requires a timer or counter circuit.

FIG. 2 is an explanatory diagram of a conventional structure, which is simplified because the method shown in FIG. 1 is expensive.

That is, this is a method of directly inserting the original document 1 to the reading position A, which requires only one feed roller and does not require the feeding and setting operation up to point A, so the price is low. Since the leading edge of the document is not fully held, the leading edge of the document will not be gripped by the feeding roller 12 unless it is held firmly by hand until the feeding roller 12 rotates. It had the disadvantage of causing inconvenience.

The present invention eliminates the above-mentioned drawbacks by providing an auxiliary roller in front of the sending roller and giving the auxiliary roller the ability to rotate in one direction, thereby providing an inexpensive and easy-to-operate mechanism that makes it possible to hold the sent document in its mouth. It is something.

Next, the present invention will be explained in detail with reference to the drawings.

3 and 4 are a cross-sectional structural view and a perspective view showing an embodiment of the present invention, in which the transmission document feed roller 21 is rotated by receiving the rotational force of a synchronous motor 22 via a timing belt 23. FIG.

On the other hand, the rotation of the roller 21 that feeds the transmission document is transmitted to the auxiliary roller shaft 25 by the timing belt 24, and the auxiliary roller shaft 25 rotates.

An auxiliary roller 27 is fitted onto the auxiliary roller shaft 25 via a clutch spring 26.

Now, the synchronous motor 22 is stopped, that is, the transmission document feed roller 21 is stopped.
When the auxiliary roller shaft 25 is stopped, the auxiliary roller 27 is rotatable in the direction of the arrow a in FIGS. 3 and 4, and is stopped in the direction of the arrow b.

When the synchronous motor 22 is driven, that is, when the transmission document feeding roller 21 and the auxiliary roller shaft 25 are driven (rotating in the direction of arrow a in FIGS. 3 and 4), the auxiliary roller 2
7 is driven at the same time.

This is because the auxiliary roller shaft 25 and the auxiliary roller 27 are connected by the clutch spring 26.
In this embodiment, by utilizing the one-way clutch engagement provided by the clutch spring 26, the auxiliary roller is rotated in the direction in which the auxiliary roller shaft 25 rotates in the a direction in FIGS. 3 and 4, and the auxiliary roller 27 rotates in the b direction. This is because the coupling direction of the clutch spring 26 is determined so that the shaft 25 and the auxiliary roller 27 are coupled together.

Further, a reading point A directly below the transmission document feed roller 21 is set, and the light reflected from the transmission document 29 by the light source lamp 28 is imaged by the lens 30 on the light receiving surface 32 of the image sensing element 31.

Reference numeral 33 designates a glass document reading surface, which is pressed by a spring (not shown) against the roller 21 that feeds the transmitted document.

The light emitting diode 34 and the phototransistor 35 are photodetectors for detecting the presence or absence of the transmission document 29.

The auxiliary roller 27 is an extremely soft roller made of sponge, and is located close to the document guide plate 36.

3 and 4, when the transmission document 29 is inserted in the direction of the arrow in FIGS. 3 and 4, the transmission document 29 passes between the auxiliary roller 27 and the document guide plate 36, and the transmission document feed roller 2 Stop just before.

At this time, the auxiliary roller 27 is rotatable in the direction a, and rotates in the direction a as the transmission document 29 is inserted, so that it does not interfere with the passage of the transmission document 29.

Furthermore, the auxiliary roller 27 lightly presses the transmission original 29 due to the insertion of the transmission original 29.
In the return direction of 9, since the auxiliary roller 27 does not rotate, it is difficult for the transmitted original 29 to return.
maintains a standby state where it remains stopped just in front of the roller 21 that feeds the transmission document.

As explained above, the present invention provides an auxiliary roller that lightly presses the original to be sent in front of the original to be sent roller, and also adds rotation control to the auxiliary roller using a one-way clutch to prevent insertion of the original to be sent. The original can be reliably held by rotating easily and acting as a load when returning.

Furthermore, as with the conventional method shown in Fig. 2, it is possible to insert the original to be sent directly to the reading position, which has the advantage of reducing costs by eliminating the need for expensive accessories as shown in Fig. 1. be.

As another embodiment of the present invention, as shown in FIG. 5, a lever (not shown) is operated between the auxiliary roller 27 and the document guide 36.
The structure is such that a gap t is provided to facilitate the insertion and holding of particularly thin originals.

In addition, in FIG. 5, 21 is a roller for feeding the transmission document, 33
is the glass reading surface.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of the prior art, FIGS. 3 and 4 are cross-sectional structural diagrams and perspective views showing an embodiment of the present invention, and FIG.
The figure is a partial sectional view of another embodiment of the present invention. 21... Transmission document feed roller, 25...
- Auxiliary roller shaft, 26...Clutch spring, 27...Auxiliary loaf.

Claims (1)

[Scope of utility model registration request] A synchronous motor, a transmission document feed roller driven by the synchronous motor, an auxiliary roller shaft driven by the transmission document feed roller, a one-way clutch attached to the auxiliary roller shaft, and a one-way clutch fitted to the auxiliary roller shaft. and an auxiliary roller that engages with the one-way clutch, the auxiliary roller and the auxiliary roller shaft are uncoupled with respect to the rotation of the auxiliary roller in the sending document feeding direction, and the auxiliary roller is rotated in the sending document returning direction. A transmission original gripping mechanism in a facsimile machine or the like, characterized in that the one-way clutch is set so as to be in a coupled state with respect to the transmission document.