JPH0328433Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an automatic document feeding device that feeds and sets a document on the document setting surface of an image processing device such as a copying machine.

[Prior Art] As an automatic document feeder, a conveyor belt stretched between a pair of belt pulleys is provided on the document setting surface of the main body of an image processing apparatus, and the document is fed by this conveyor belt to a predetermined position. There are known devices that set it at a reference position.

Conventionally, in this type of automatic document feeder, in order to ensure reliable sheet ejection, it is known that a sheet ejection roller is always pressed against the document ejection end side of the conveyor belt to sandwich and eject the document.

On the other hand, in the above-mentioned automatic document feeder, a swingable movable member is provided at the document ejection side end of the document setting surface, and a stopper portion is provided at the tip of this movable member to protrude and stop the document when the document is set. It is known that a paper ejection guide section is formed on the rear side of the movable member to guide ejection of the original (Japanese Patent Application Laid-open No.
55-17151).

[Problems to be solved by the invention] However, with the above-mentioned conventional paper ejection roller, the paper ejection roller is always in pressure contact with the conveyor belt, so there are inconveniences such as the paper ejection roller becoming an obstacle when extracting a jammed original. There is.

In order to eliminate this inconvenience, the paper ejection roller may be brought into contact with the conveyance belt only when the document is ejected.

However, if the paper ejection roller and the movable member including the stopper section and the paper ejection guide plate are separate members and respective control and driving means are provided, the structure becomes complicated and the operation becomes complicated and uncertain. There is a problem.

The object of this invention is to provide an automatic document feeder that has a simple structure and simple operation, and is capable of stopping the document when setting the document and reliably ejecting the document.

[Means for Achieving the Object] In order to achieve the above object, the features of this invention include: an ejection drive unit that is provided at the end of the document set surface on the document exit side and that discharges the document; A movable member is swingably provided at the side end portion, and a stopper portion is provided at the tip end of the movable member facing the end of the document setting surface, and protrudes above the document setting surface when the document is set to stop the advance of the document. and a paper ejection guide part provided on the rear side of the stopper part of the movable member and formed in a curved shape along the belt pulley on the document ejection side to guide the ejection of the original when ejecting the original, and a paper ejection guide of the movable member. installed on the downstream side of the
The apparatus includes an ejection holding means that abuts the ejection drive section and ejects the original only when ejecting the original.

[Operation] The movable member is swung, and when a document is set, the stopper portion at the tip of the movable member projects above the document setting surface to stop the document.

When discharging a document, the document is guided along the curved paper discharge guide section. Further, the ejection nipping means comes into contact with an ejection drive unit such as a conveyance belt or a drive roller to nip the original, thereby ensuring ejection of the original.

[Example] An example of this invention will be described below with reference to the drawings.

In Fig. 1, 1 is the main body of the copying machine, which has a built-in copying optical system (not shown), and 3 is the original setting surface.If the original is set at a predetermined position on this original setting surface 3, a copy can be obtained. ing.

Devices that automatically feed originals onto the original setting surface 3 of the copying machine body 1 include those that manually feed originals one by one onto the original table, and those that automatically separate and feed originals stored on the original table. There are also known types of conveyor belts, such as those with a single wide belt, or those with multiple belts, and the present invention can be applied to any combination of the above. However, the illustrated manual automatic document feeding device will be explained.

The automatic document feeder indicated by the general symbol 2 includes a document table 4, an entrance roller 6 and a feeding guide 8 that turn the document over, a pinch roller 5 that presses the document against the entrance roller, and a pair of pulleys 9 and 14. It is generally composed of a conveyor belt 13 stretched between them, a movable member 16 having a stopper means for stopping the document, and a discharge tray 21 for storing the discharged document.

Reference numerals 11 and 12 are press rollers for pressing the conveyor belt against the document set surface, 22 is a cover, and 7 and 15 are pulley shafts, respectively.

An example in which the present invention is applied to the above-mentioned apparatus as follows will be described with reference to FIG. 1 and FIG. 2. In FIG. 2, the same reference numerals as in FIG. 1 indicate the same configuration.

The movable member 16 is formed into a curved shape along the outlet pulley 14, and is swingably provided on a support shaft 17 fixed to the machine frame of the feeding device. A spring (not shown) is wound around the support shaft 17,
One side of this spring is fixed to the machine frame of the feeding device, and the other side is fixed to the movable member 16.
6a is always urged and brought into contact with the conveyor belt 13. The stopper portion 16a is made of a material having a coefficient of friction greater than that of the conveyor belt 13.

A pin 20 is provided protruding from the upper part of the movable member 16,
This pin 20 is connected to a lever 18a of a solenoid 18 fixed to the machine frame of the feeding device (see FIG. 1). When this solenoid 18 is energized,
The movable member 16 is rotated clockwise about the support 17 by a lever 18a, thereby forming a path as a paper discharge guide from the conveyor belt 13 to the paper discharge stacker 21. That is, the rear side of the stopper section of the movable member serves as a paper discharge guide section. The surface of the paper ejection guide portion 16b is made of a lubricating member to ensure ejection of the original.

When the operating solenoid 18 is de-energized, the movable member 16 is rotated counterclockwise by the spring so that the stopper portion 16a comes into contact with the conveyor belt 13 as a discharge drive means.

Further, a shaft 24 is provided through the movable member 16, and a paper discharge roller 23 serving as a discharge nipping means is attached to this shaft 24.
has been established. Due to the swinging of the movable member 16, the paper ejection roller 23 comes into contact with the conveyor belt 13 only when ejecting the original, and ejects the original.

The device configured as described above operates as follows.

A document D is conveyed on the document setting surface 3 by a conveyor belt 13. When approaching the document setting reference position, that is, the position where the stopper portion 16a of the movable member 16 and the document D engage, the drive of the conveyor belt 13 is cut off, but the conveyor belt 13 further moves due to inertia and advances the document D. try Then, the advance of the document D is stopped by the stopper portion 16a, which is already biased and in contact with the conveyor belt 13 by the spring, and is accurately set at the document setting reference position.

After that, the optical system of the copying machine main body 1 starts operating, and when copying is completed, the solenoid is energized.
As shown in the figure, the movable member 16 rotates clockwise about the support shaft 17 to form a document discharge path, and the paper discharge roller 23 urges and contacts the conveyor belt 13.

Next, the conveyor belt 13 is driven, and the document D is guided along the discharge guide portion 16b of the movable member 16, which is made of a slippery material having a coefficient of friction smaller than at least the conveyor belt 13.

Further, the document to be discharged is held between the paper discharge roller 23 and the conveyor belt 13 and is discharged to the paper discharge stacker.

When the rear end of the document D passes the paper discharge guide section 16b, the solenoid is de-energized, and the stopper section 16a comes into contact with the conveyor belt 13 due to the spring and waits for the document D at a position where it is biased.

The above embodiment has the following advantages.

Since the document is stopped by the stopper portion 16a made of a material having a coefficient of friction greater than that of the conveyor belt 13, the document is stopped reliably.

The document D is guided along the paper discharge guide section 16b formed of a slippery material having a smaller coefficient of friction than the conveyor belt 13 of the movable member 16, so that the document D is guided reliably.

Further, since the discharge roller 23 and the conveyance belt 13 sandwich the document and discharge it to the paper discharge stacker, the document can be surely discharged.

This can be realized by a simple structure in which the stopper and the ejection holding means are integrally provided on the swingable movable member 16, and by the simple operation of swinging the movable member 16, the stopper part 16a and the paper ejection roller 23 can be moved. appear and appear reciprocally, allowing the document to be stopped and ejected reliably.

Since the paper discharge roller 23 is separated from the conveyor belt 13 except when the document is being discharged, a jammed document, for example, can be immediately removed.

Since the paper ejection roller 23 is separated from the conveyor belt 13 except when the document is ejected, wear of the conveyor belt 13 can be reduced.

It goes without saying that the invention is not limited to the above embodiments.

For example, the ejection nipping means is not limited to a paper ejection roller, but may be a plate spring or the like.

Further, although the conveyance belt is used as the ejection driving means in the above embodiment, it may be any other device that drives a drive roller provided separately from the conveyance belt and ejects the document together with the ejection nipping means.

[Effects of the invention] In the invention described above, the stopper and the ejection holding means can be realized by a simple structure in which both are integrally provided on a swingable movable member, and a simple structure for swinging the movable member can be realized. Through the operation, the original stopper and the original ejecting and holding means reciprocally retract and reciprocate, thereby reliably stopping and ejecting the original. Further, since the ejection holding means is separated from the ejection driving section except when ejecting the original, it is possible to immediately remove a jammed original, for example.

[Brief explanation of the drawing]

Figure 1 is an overall explanatory diagram of the embodiment of this invention, Figure 2
The figure is an explanatory diagram of the main part. 1: copying machine main body, 3: document setting surface, 13: conveyance belt, 14: exit pulley, 16: movable member, 16a: stopper section, 16b: paper ejection guide section, 23: paper ejection roller, D: document.

Claims (1)

[Claim for Utility Model Registration] A conveyor belt stretched between a pair of belt pulleys is provided on the document setting surface of the main body of the image processing apparatus, and the document is fed by this conveyor belt to a predetermined reference position. The automatic document feeder to be set includes: an ejection drive unit provided at an end of the document setting surface on the document exit side and for ejecting the document; and a discharge drive section swingably provided at the document exit side end of the document setting surface. a movable member; a stopper portion provided at the distal end of the movable member facing the end of the document setting surface and protruding above the document setting surface when the document is set to stop the advance of the document; and a rear portion of the stopper portion of the movable member. a paper ejection guide section provided on the side and formed in a curved shape along the belt pulley on the document ejection side to guide ejection of the document when the document is ejected; and a paper ejection guide section provided on the downstream side of the paper ejection guide section of the movable member. 1. An automatic document feeder comprising: a discharge nipping means that comes into contact with the discharge drive section and discharges the document only when the document is being discharged.