JPS6036237A - Automatic document feed device - Google Patents

Abstract

PURPOSE:To improve convenience of use and safety of the captioned device by enabling an open-close body to become stationary at an arbitrary open angle due to a chain energized by a spring in the one direction, in the captioned device provided with a document carrying belt provided in said open-close body hinged on a device body part. CONSTITUTION:In the captioned automatic document feed device wherein an open-close body 4 is rotatably connected to a device body part 1 mounted on the upper surface of a copying machine A and equipped with delivery belt 13 and handling rubber 14, etc., via a hinge bracket 2, and a carrying belt 3 is provided in said open-close body 4, a pair of mounting brackets 25, 26 facing to each other in the length direction are fixed on the machine frame 21 side surface of the open-close body 4. A sliding rod 27 is supported between these brackets 25, 26 and energized to the left by a compression spring 28. After guiding an intermediate portion of a chain 30, with its one end fixed on the end part of said sliding rod 27, by a guide member 34 provided for going around a direction converting sprocket 32 and a paper feed roller bearing 33, the other end of said chain 30 is fixed on a stay 31.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder used, for example, in an electrophotographic copying machine, and more particularly to a structure for safely and accurately handling "jams".

-Prior Art- As is well known, the automatic document feeder 9 is used, for example, to automatically feed a document onto the document table glass of an electrophotographic copying machine. The paper is collected in the paper output tray provided in the device.

By the way, in automatic document feeders used for such purposes, the original document feeder may become "jammed" internally, so the main body with the built-in paper feeder is installed in the copying machine and the paper feeder is An opening/closing body having a built-in conveyor belt for conveying the document sent out by the apparatus is hingedly connected to the main body,
Normally, when a "jam" occurs, the opening/closing body is opened to expose the original table glass to the outside, and the stuck original can be removed. However, such a block, c structure 1
According to 7 History, the weight of the opening/closing body is Kana 9, so it is necessary to hold the opening/closing body in the open state with one hand while handling the caught manuscript with the other hand, which may cause damage such as tearing the manuscript. There are many mistakes, and it can be difficult to properly "jam". If you accidentally remove your hand from the opening/closing body while it is opening,
Since the opening/closing body falls rapidly, there is a risk of getting your hand caught between the opening/closing body and the document table, and even the 1 m safety measure poses a problem.

1. Object and Structure of the Present Invention 1. In view of the above-mentioned problems of operability and safety of conventional automatic document feeders, the present invention has been developed to allow "jam" processing to be carried out properly with both hands. The purpose is to obtain a structure that does not pose any danger to the human body when operating the opening/closing body.The document is taken into the main body, and the document is transported by a conveyor belt inside the opening/closing body that is hinged to the main body. In an automatic document feeder that sends a JE+ document to a paper ejection tray of an opening/closing body, a sliding rod biased by a balance spring is provided on the side of the opening/closing body, and one end of the sliding rod has an opening/closing mechanism. By connecting one end of the chain hooked to the direction changing sprocket of the body base, hooking the same chain to the guide member of the body part that rotates the hinge, and fixing the other end to the body part, the opening/closing body can be opened and closed. It is proposed to stop at any opening/closing angle.

An embodiment of the present invention Embodiments of the invention will now be described in detail with reference to the drawings.

1 and 2 show the overall structure of an automatic document feeder according to the present invention. On the other hand, the opening/closing body arm includes a conveyor belt 8 that is rotatably connected via a hinge bracket 2 and faces the document table glass a of the copying machine A. Multiple originals 4'A
The paper sheets X are stacked on a paper feed tray 6 fixed to one end of the main body 1 facing the intake port 5, and the paper sheets X are placed on a paper tray 6 facing the intake port 5 and placed on a paper tray 6 fixed to one end of the main body 1. The paper is taken out onto a paper tray 8 and collected.

As shown in an enlarged view in FIG. 8, a spring plate 9 for receiving the front end of the original paper ti4x on the paper feed tray 6 is located inside the main body 1, and this spring plate 9 supports the support shaft 10. It is sprung up by the force of a spring 12 applied to a lever 11 (shown in the figure) provided at the end of the Φ. In addition, a paper feed tray 6 is provided in the main body 1.
A feeding device is positioned to take out the upper document X one by one. The feeding device is a flip-up plate 9 that is flipped up based on a command from the copying machine.
a feeding belt 1B that is driven in the direction of the arrow in tandem with the
It has a sorting rubber 14 that is pressed against the lower surface of the feeding belt 18, and by the action of the sorting rubber 14, documents or documents on the paper feed tray 6 are taken out one by one. Of course, the structure of the spring plate 9 and the feeding device are not the gist of the present invention, and are omitted in the case of a structure in which documents are placed one sheet at a time on the paper feed tray 6.

The document X fed out by the feeding device is placed in the machine frame 15.
The paper is taken up by a paper feed roller 16 which is rotatably wrapped around the paper.

The paper feed roller 16 is supported by the machine frame 15 in a concentric relationship with the hinge bracket 2 of the opening/closing body 4 described above.
A pressure roller 19 that rolls into contact with the circumferential surface of the paper feed roller 16 is rotatably supported on a pressure shaft 18 that is movably supported in a long hole (not shown) in the body frame 15 . Further, the pressing shaft 18 is pressed toward the paper feed roller 16 by a spring 20 shown in the eighth figure.

The conveyor belt 8 is stretched between a driving roller 22 and a driven roller 23 supported by the machine frame 21 of the opening/closing body 4 fixed to the hinge bracket 2, and is kept under tension by a plurality of idlers 24 arranged around the inner circumference thereof. is maintained. This conveyor belt 8 conveys the driving roller X of the drive roller 22 facing the main body 1 to a predetermined position on the document platen glass a, stops it, starts again after copying is completed, and conveys the document X to the left. do.

As shown in Figure 2, the machine frame? ■A pair of mounting brackets 25 are provided on the sides of the
, 26 are fixed, a sliding rod 27 is supported slidably in the length direction between both mounting brackets 25 and 26, and an opening/closing body is provided between the sliding rod 27 and the right mounting bracket 26. A balance spring 28 made of a compression spring is interposed to balance the weight moment of Φ. The balance spring 28, which is guided by the L-tube + J-fu 29 fixed to the mounting bracket 26, is supported by the weight f? of the opening/closing body Φ. tG, distance 1111L from the homo of the opening/closing body Φ to the center of the hinge bracket 2,
It bears the weight moment represented by the product of the opening angle θ of the opening/closing body Φ with respect to the horizontal plane, and one end of a chino 30 drawn from the main body 1 is tied to one end of the sliding rod 27. That is, the middle part of the chino 80, whose other end is fixed to the stay 81 shown in the fourth figure, is hooked on the direction changing sprocket 82 at the base of the machine frame z1, and is connected to the paper feed roller 1.
It is wound around the guide curved surface B5 of the guide member 3Φ provided on the opposite side of the direction changing sprocket 32, passing around the bearing 8B of No. 6. In other words, by setting the relative position between the direction conversion sprocket 82 and the hinge center of the hinge bracket 2 and the rate of change in the tangential direction of the guide curved surface 85 to appropriate values, the sliding force that stores the force of the balance spring 28 can be adjusted. Moving rod 2
? The problem is to set the amount of displacement to a value commensurate with the aforementioned weight loss. In addition, in order to adjust the initial stress of the balance spring 28, a sleeve 36 that can freely move with respect to the sliding rod 27 and the mounting bracket 25 is supported on the left mounting bracket 25, and a collar 36a of the sleeve 36 is supported. One end of the balance spring 28 is applied with force. Therefore, by simply adjusting the adjusting nut 88 screwed onto the left end thread a7 of the sliding rod 27, initial adjustment can be performed taking into account dimensional errors and frictional abrasion of each part.

Returning to FIG. 1, at the left end of the opening/closing body Φ is a circular guide plate 39.
A discharge roller Φ0 is incorporated, and the document X sent by the conveyor belt 8 is discharged onto the discharge goose tray 8. The base of the paper ejection tray 8 is attached to the opening/closing body Φ with a hinge pin hand 1, and the inside of the paper ejection tray 8 is connected by a chevron-shaped connecting rod Φ2 extending between the lower surface of the bar 1 and the upper part of the main body 1. Further, the connecting rod Φ2 maintains the inclination of the paper discharge tray 8 in the vertical plane when the opening/closing body Φ is opened like a virtual water drill.

Since the automatic document feeder according to the illustrated embodiment has the structure shown above, the opening/closing body can be opened at any opening angle from the training water position to the virtual mixing water position for 'jam' handling. Then, the displacement of the sliding rod z7 corresponding to this opening angle will be given by the chain 30. Therefore, the weight moment of the opening/closing body Φ is always balanced by the reaction force of the balance spring 280. The opening/closing body Φ will come to rest at a free opening angle position.

Note that the relationship between the sliding rod and the balance spring in the above embodiment is not limited to the structure shown in the drawings; for example, the balance spring may be constructed with a tension spring, and the balance spring blade may be replaced with another lever member. It may also be applied to the sliding rod via the like.

1. Effects of the present invention - As is clear from the above description, according to the present invention, the opening/closing body opened for "jam" handling is balanced by a balance spring and kept stationary at an arbitrary opening angle. ,
You can remove your hand from the opening/closing body and use both hands to handle "jams," and the opening/closing body will not drop quickly and get your hands caught, providing an automatic document feeder with excellent safety. can do.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the entire automatic document feeder according to the present invention, FIG. 2 is a sectional view of the entire #I document feeder according to the present invention, and FIG. 8 is a main part of the same automatic document feeder. Central sectional view of
Fig. Φ is a side sectional view of the main parts of the automatic document feeder. 1... Main body, 2... Hinge bracket, 8...
Conveyor belt, Φ... Opening/closing body, 8... Paper ejection tray, 2
7...Sliding rod, 28...Balance spring,
80...Cheno, 3Φ...Guiding member.

Claims (1)

[Claims] 1) Load the original into the main body, feed the original using a conveyor belt inside the opening/closing body that is hinged to the main body, and take out the raw material to the paper ejection tray of the opening/closing body f2! I In the document feeder, a sliding rod biased by a balance spring is provided on the side of the opening/closing body, and one end of the sliding rod is connected to one end of a check 7 hooked on a direction changing sprocket at the base of the opening/closing body. amnesty for making it possible to stop the opening/closing body at any opening/closing angle by hooking the chain to the guide member of the main body that is connected and rotated by the hinge and fixing the other end to the main body Automatic document feeder.