JPS6234914Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a feeding original that stops the original at a reference position when the original is automatically fed and set using a conveyor belt disposed on the original setting surface. The present invention relates to a document feeding device equipped with a positioning stopper.

[Conventional technology]

Generally, in this type of device, it is necessary to feed the document onto the loading surface using a conveyor belt and at the same time stop it at a reference position. It is broadly divided into those that stop when they hit the.

Among these, the one that stops the original by hitting the stopper member, the one that stops the original by hitting the stopper member waiting forward in the feeding direction, and the one that stops the original by hitting the stopper member waiting in front of the feeding direction, and the one that stops the original by hitting the stopper member that is waiting in front of the feeding direction, and the one that stops the original by hitting the stopper member that is waiting in front of the feeding direction, and the one that stops the original by hitting the stopper member that is waiting in front of the feeding direction, and the one that stops the original by hitting the stopper member waiting in front of the feeding direction, and the one that stops the original by hitting the stopper member that is waiting in front of the feeding direction, and the one that stops the original by hitting the stopper member that is waiting in front of the feeding direction, and the one that stops the original by hitting the stopper member that is waiting in front of the feeding direction. It is known that the rear end is stopped by hitting a stopper member.

The present invention relates to a method in which the document is reversed and its rear end is brought into contact with a stopper member to stop and set it at a reference position.In such a case, a stopper stepped portion forming a step at the reference position on the document setting surface is provided, When a document is fed between the stopper stepped portion and the conveyor belt, conditions must be met so that the document is likely to enter the gap, and when the document backs up and hits the belt, it is difficult for the document to enter and cross over.

[Problem that the invention attempts to solve]

Conventionally, a roller is simply installed inside the belt to press the conveyor belt against the set surface near the step of the stopper, but this may occur due to conditions such as the conveyor belt being made of a soft rubber material, or the paper quality, thickness, or curl of the document. If they overlap, the leading edge of the document may not enter during feeding, or
Otherwise, even if the document enters the document, sufficient conveying force of the belt is not transmitted, or when the document backs up and hits the step part of the stopper, the trailing edge of the document climbs over the stopper step, and this often results in erroneous copying.

[Purpose of invention]

In view of this point, the present invention has been designed so that the engagement relationship between the stopper stepped portion provided at the entrance end of the document setting surface and the conveyor belt is such that it is easy for the document to enter when the document is being fed, and it is difficult for the document to be pushed back against the conveyor belt. To provide a document feeding device which is capable of reliably feeding and reliably stopping at a reference position without the risk of the document being crossed over.

[Example of idea]

The configuration will be described in detail below based on one embodiment shown in the drawings.

First, the overall structure of a copying machine document feeding device employing the present invention will be explained.

The general symbol A in FIG. 1 is a copying machine, and 1 is its original setting surface. This original setting surface 1 is usually made of a transparent glass material, and has a copying optical system, a transfer mechanism, a printing mechanism, etc. built into it, and is designed to scan the original on the setting surface 1, transfer it to copy paper, and print it. It's getting old.

The document feeding device, indicated by the general symbol B, sequentially feeds the document manually inserted by the user onto the document setting surface 1, or a series of documents stored in a stacker, stops at the copy reference position, sets the document, and finishes copying. After that, this original is ejected and the next original is fed.

For this purpose, on the document setting surface 1, an endless belt is stretched between a pair of left and right pulleys 2 and 3, and a conveyor belt 4 is arranged so as to be in sliding contact with the document setting surface 1.

The conveyor belt 4 is made of urethane rubber or other rubber-based high friction material, and normally has extremely soft characteristics.

Of the pulleys 2 and 3 supporting the conveyor belt 4, a drive motor is connected to the entrance pulley 2 through which the original is fed. When rotating clockwise in Figure 1 to feed the original onto the setting surface 1, the conveyor belt 4
The side facing the set surface 1 becomes the loose side and fits onto the set surface 1, and when rotating in the opposite direction, becomes the tension side and tends to float from the set surface 1.

Reference numeral 5 denotes a document stacker, which faces the 2 ends of the pulleys on the entrance side of the conveyor belt 4, 6 a separating means for the document, and 7 a pair of registration rollers for temporarily stopping and waiting for the document fed out from the separating means 6. be.

Reference numeral 9 denotes a paper ejection stacker disposed on the opposite side of the document stacker 5, facing the exit side pulley 3 of the conveyor belt 4, and 10 is a pair of paper ejection rollers thereof. S
1 and S2 are document detection sensors provided at the positions shown in the figure.

A stopper stepped portion 11 is provided at the document feeding entrance end 1a of the document setting surface 1 in a configuration to be described later, and this stepped portion 11 is set at a copying reference position on the document setting surface 1.

Then, one of the series of originals stored on the original stacker 5 is first separated by the separating means 6, hits the pair of registration rollers 7, and is curved into a loop shape. At this time, the separation means 6 is stopped after an estimated time (timer setting) for forming this loop after the sensor S1 detects the leading edge of the document.

Next, in response to a document feeding instruction signal from the copying machine A, the registration roller pair 7 is rotated, and at the same time, the conveyor belt 4 is rotated clockwise in FIG.

The separation means 6 has a built-in one-way clutch that allows the document to be pulled out by the pair of registration rollers 7, and the first document is gradually pulled out by the registration rollers 7.
from there to the conveyor belt 4.

When the trailing edge of this document passes the sensor S1, the pair of registration rollers 7 is stopped with a slight delay, and the separating means 6 is driven to feed the next document to the position of the pair of registration rollers 7.

On the other hand, the document fed into the entrance pulley 2 of the conveyor belt 4 is fed along the document set surface 1 together with the belt 4, and after its rear end passes the stopper step 11, the conveyor belt 4 is stopped via a timer in response to a document rear end passing signal from the sensor S1.

Then, the original is placed on the original setting surface 1, and the original is stopped at a different position each time depending on the inertia of the conveyor belt 4, the paper quality of the original, and the static electricity between the belt 4 and the original setting surface 1.

Next, the conveyor belt 4 is rotated in the opposite direction to the previous feeding direction, and the document on the set surface 1 is pushed back toward the entrance end 1a. Then, the trailing edge of the document abuts against the stopper stepped portion 11 and is stopped. The driving of the conveyor belt 4 is cut off at the same time as this stopping of the document, and after the document has stopped, the conveyor belt is stopped with a slight delay.

Then, the scanning operation of the copying machine A is started to perform copying, and when the copying process end signal is received, the pair of registration rollers 7 and the conveyor belt 4 rotate clockwise in FIG. At the same time as the document is sent out from the exit pulley 3 portion to the pair of discharge rollers 10, the next document waiting on the pair of registration rollers 7 is sent out toward the document set surface 1.

By repeating the above operations, it becomes possible to continuously feed and set documents on the document setting surface 1 and discharge the documents after copying.

As shown in FIGS. 2 and 3, the present invention has an abutment surface 11a that forms a step between the stopper stepped portion 11 and the document set surface 1, and a guide surface 11b that faces the conveyor belt 4. It is composed of a plate-like piece, and a conveyor belt 4 is constantly placed on this guide surface 11b.
Movable stopper piece 1 biased by a spring 12 on the side
3.

As shown in FIG. 2, at the copy reference position of the document setting surface 1, a plate-shaped abutting surface 11a in a direction perpendicular to the setting surface 1 and a guide surface 11b in a direction along the conveyor belt 4 are formed. Yes, this guide surface 11
A movable stopper piece 13 is provided on b, and is biased by a coil spring 12 so as to be in constant pressure contact with the conveyor belt 4.

3, the conveyor belt 4 is supported by a leaf spring 12 on a guide surface 11b similar to that shown in FIG.
A movable stopper piece 13 is always biased so as to be in pressure contact with the
is provided.

This movable stopper piece 13 can be provided so as to be in pressure contact with the belt over the entire length in the width direction of the document to be conveyed, as shown in FIG. It may be attached to one or more concave portions 15 of the plate-like piece 11 formed at appropriate locations in the direction.

If the movable stopper piece 13 is made of a material whose coefficient of friction against the original is smaller than that of the conveyor belt 4, the biasing force of the spring 12 may be increased to create a small gap between the stopper piece 13 and the conveyor belt 4. Although it is preferable to prevent this from occurring, the belt shown in Fig. 2 is made of the same material as the conveyor belt 4 and has an equal coefficient of friction against the document, while the belt shown in Figure 3 is made of the same material as the conveyor belt 4 and has a coefficient of friction greater than that of the conveyor belt 4. be.

This is because the belt shown in FIG. 2 has a structure in which the stopper piece 13 partially contacts the conveyor belt 4 in the width direction, so the pressure force of the spring 12 causes the part of the belt that the stopper piece 13 contacts to dent locally. Since the conveyor belt 4 waves unevenly in the document width direction, there is little risk of the document hitting the stopper piece 13 during back conveyance and overrunning, and the belt shown in FIG. 3 cannot be expected to have such an effect. This is to increase the coefficient of friction on the stopper piece 13 side to reliably stop the document that is trying to climb over the stopper step 11 together with the conveyor belt 4.

Therefore, even with the structure shown in FIG. 2, the stopper piece 1
If the friction coefficient of the third side is made larger than that of the conveyor belt 4, the accuracy of stopping the document will be improved.

〔effect〕

In summary, in the present invention, when the conveyor belt 4 feeds a document to the setting surface 1, the moving direction of the conveyor belt 4 pushes down the spring-biased movable stopper piece 13 provided on the stopper step 11 facing the conveyor belt 4. By applying a force in the direction, a gap is formed between the movable stopper piece 13 and the conveyor belt 4 as shown in FIGS. Even if there is a problem, the document can be reliably fed into the document setting surface 1.

Conversely, when the conveyor belt 4 is reversely conveyed to abut the rear end of the document conveyed backwards against the stopper stepped portion 11, the conveyor belt 4 moves the movable stopper piece 13 in the same direction as shown in FIGS. 2 and 3 D. It moves upward in the figure, and together with the elastic force of the spring 12, prevents the leading edge of the document from entering between the conveyor belt 4 and the stopper piece 13, and securely stops and sets the document on the abutment surface 11a. can do.

Therefore, the document feeding device of the present invention can smoothly feed a document to the document set surface 1 without interfering with the advance of the document, and can also back-feed the document carried to the document set surface 1. Stopper stepped portion 11
When the document hits the stopper, it is possible to prevent the document attached to the belt from climbing over the stopper and to ensure that the document is stopped and set.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory diagram showing an example of a document feeding device in which the present invention is adopted, FIG. 2 is an explanatory diagram of a preferred embodiment of the present invention, and FIG.
2B is a plane explanatory diagram of the main part, FIGS. 2C and 2 are explanatory diagrams of its operating state, FIG. 3 shows different embodiments, FIG. FIG. 3B is an explanatory plan view of the main part, and FIGS. 3C and 3 are explanatory diagrams of its operating state. 1...Original set surface, 4...Transport belt, 11
...Stopper step, 12...Spring, 13...
...Movable stopper piece.

Claims (1)

[Scope of utility model registration request] A conveyor belt stretched over the document set surface feeds the document from the entrance end of the document set surface, and the edge of the document is transported back to the document set by back conveying in the opposite direction to the feeding direction of the conveyor belt. In a document feeding device that abuts against and aligns with a stopper stepped portion provided at an entrance end of a surface, the stopper stepped portion is arranged between an abutting surface forming a step between the document setting surface and the conveying belt. The present invention is characterized by comprising a member having a guide surface forming a gap between the conveyor belt and the document through which the document enters, and a movable stopper piece that is always biased by a spring toward the conveyor belt on the guide surface. document feeding device.