JPH023990B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a copying machine having an automatic document feeder, and more particularly to an improvement in a stopper portion for positioning and stopping a document at a predetermined position.

In a copying machine equipped with an automatic document feeder,
If a copying machine, etc., in which originals are loaded manually or by an automatic feeder, is equipped with a positioning ruler that protrudes above the glass platen, it may be difficult to transport the exposed original. Therefore, no protrusions can be provided on or around the document table glass. For this reason, in conventional copying machines equipped with an automatic document feeder, a stopper that can be lowered onto the document table glass is built into the automatic document feeder. Alternatively, a structure is adopted in which a retractable stopper is located in the main body of the copying machine and the stopper is retreated under the document table glass after exposure.

However, with the former structure, when manually setting the original on the platen glass, the stopper cannot be used, so positioning the original often takes time. There was a problem in that the original got stuck between the side of the stopper and the original table glass, making it impossible to accurately position the original. In addition, although the latter structure has the advantage that the stopper can be used even when setting the document manually, when the stopper can be retracted under the platen glass after exposure, the edge of the document that was in contact with the side of the stopper Frictional force is applied to the surface, and the leading edge of the document sometimes slips into the gap between the stopper and the document table glass, making it difficult to eject the document.

In view of the problems of conventional copying machines as described above, the present invention provides a positioning reference even when the original is set manually, and there is no problem when the original is automatically ejected after exposure. The present invention proposes a stopper part with a structure that allows the liquid to be discharged.

The invention will be explained in detail below by means of embodiments shown in the drawings.

In FIGS. 1 and 2, an original platen glass 2 is installed on the upper surface of the copying machine main body, which is indicated by the reference numeral 1 as a whole, and an original placed on this original platen glass 2 is exposed and copied. be done. A document insertion table 3 and a document ejection tray 4 are fixed to the upper left and right sides of the copying machine main body 1, and are positioned opposite to each other with the document table glass 2 in between. The original is taken onto the original platen glass 2 by an original supply device 5, which will be described later, and is discharged onto the original discharge tray 4 by the original supply device 5 after exposure.

The document feeding device 5 can be stopped at any opening angle by a pair of supporting means 6A and 6B installed on the rear side of the upper surface of the copying machine main body 1, and as shown in FIG. It has a built-in supply section 7, conveyance section 8, and discharge section 9 that are adjacent to each other. The supply unit 7 includes a supply roller 1 operated by a detection signal from a detector 10.
1 and 12 and a gate member 13, the conveyance unit 8 includes an endless conveyance belt 16 stretched between a drive pulley 14 and a driven pulley 15, and the drive pulley 14 The container 17 is the manuscript P
The copier body 1 is stopped when the tip of the copier body 1 is detected.
It is rotated again by the exposure completion signal from . Further, the paper ejection section 9 includes a paper ejection roller 19 that is in rolling contact with a roller 18 that is coaxial with the driven pulley 15.
The document is taken out onto the document discharge tray 4 by rotational movement with the document document 9. Furthermore, on the paper ejection side of the document platen glass 2,
A rotatable stopper member 20 for positioning the leading edge of the conveyed document P is located therein.

Details of the stopper member 20 whose ends are rotatably supported by the bearing members 21A and 21B shown in the first figure are shown in FIGS. 3 and 4. The stopper member 20 is formed with a locking surface 22 facing perpendicularly to the feeding direction of the document P and a flank surface 23 forming an angle with respect to the locking surface 22. A pinion 24 is integrated into one end of the circular stopper member 20, and this pinion 24 is connected to the control mechanism 25 shown in FIG.
The rack 26 is engaged with the rack 26. That is, the control mechanism 25
comprises a sliding member 27 to which a rack 26 is fixed,
A tension spring 28 and an electromagnetic solenoid 29 are connected to both ends of the sliding member 27. Therefore,
When the electromagnetic solenoid 29 is energized, the tension spring 28
The sliding member 27 is urged in the direction of arrow X against the force of Can be stopped. The electromagnetic solenoid 29 may be of the magnetic holding type (after being energized and activated, it is attracted and held by a permanent magnet, and when it is opened, a reverse current is applied). Also, manuscript P
When the electromagnetic solenoid 29 is demagnetized by a signal transmitted from the copying machine main body 1 after exposure, the stopper member 20 is rotated to the imaginary line position in FIG. As the conveyance path of the document P is retreated, the corner a of the flank 23 is pushed into the conveyance path, thereby regulating the position of the leading edge of the document P.

In particular, a stopper member 2 constructed according to the present invention
0, the upper part of the retaining surface 22 of the document P is formed as a curved surface, so even if the lower surface of the conveyor belt 16 comes into contact with it, it is not formed with a plate-shaped stopper like in the past, so the conveyor belt 16 There will be no significant resistance and no damage will occur. Therefore, in order to convey and stop the document P according to the present invention, the conveyor belt 1 is used.
6, the document P may be sent to the document platen glass 2 and operated in the document stopping direction as shown in FIG. 4 before the end of the document P reaches the stopper member 20. Even after reaching the stopper member 20 and being locked, it is possible to feed the conveyor belt 16 a little further, so there is no need to stop the conveyor belt at the same time as the stopper member is activated as in the conventional case. Since the end surface of the original P can be accurately applied, the original P will not be copied while being bent on the original table glass 2. Also, when ejecting the document P, the stopper member 20 is not immediately removed, but the conveyor belt 16 is first moved in the ejection direction, and if the document P is bent, it is corrected in the correct ejection direction with the stopper member 20, and then the stopper member 20 is moved. It is only necessary to operate the member 20 as shown by the chain line in FIG. 3, and the original P is always ejected in the normal position and no jam occurs.

As is clear from the above description, the stopper member 20 according to the present invention can not only be used as a ruler when manually setting a document, but also can reliably stop the leading edge of the document when automatically feeding the document.
Moreover, when the document is ejected after exposure, the locking surface 22 of the stopper member 20 functions as a guide for the leading edge of the document, and the lower surface of the leading edge of the document is pushed up by the corner a of the relief surface 23. Unlike conventional methods, it is not difficult to eject thick originals or especially thin originals, and the original can always be ejected smoothly, making copying operations smooth and without damaging the leading edge of the original. .

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a copying machine according to the present invention, and FIG. 2 is a partially cutaway side view of the same copying machine.
FIG. 3 is an enlarged sectional view of the main parts of the copying machine, and FIG. 4 is an exploded perspective view of the control mechanism for the stopper member. DESCRIPTION OF SYMBOLS 1... Copying machine main body, 2... Original table glass, 5... Original supply device, 20... Stopper member, 22... Locking surface,
23...Running surface, P...Manuscript.

Claims (1)

[Claims] 1. A copying machine equipped with a copying machine body having a document table surface on which a document can be placed, and an automatic document feeder that supplies the document onto the document table surface and automatically removes the document after the document is exposed. Rotation mechanism located along the side edge of the output side of the stand in a direction perpendicular to the document ejection direction, and having a locking surface oriented perpendicular to the document ejection direction and a relief surface at an angle to the locking surface. When a document is to be stopped, the leading edge of the document is locked to the locking surface of the stopper member, and when the document is automatically ejected, the stopper member is rotated in the transport direction. The locking surface is retracted from the document conveyance path toward the lower side of the document table surface, and the corner of the relief surface is advanced into the conveyance path to push up the leading edge of the document and prevent the document from slipping in. and a drive mechanism for the stopper member.