JPH0542994Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a device that uses a diagonal roller device to perform side registration of paper within a paper conveyance path, and in particular, the present invention relates to a device that uses a diagonal roller device to perform side registration of paper in a paper conveyance path. The present invention relates to a device that can perform diagonal feeding and stably feed paper by using an assist roller device.

(Prior Art) In devices such as copying machines, when conveying paper or originals, the sides of the paper are positioned along a reference plane so that it can be easily handled in the next process. There is. Such a conveying device is, for example,
This is a means that has conventionally been commonly used in curved conveyance paths in automatic document feeders.

In the above-mentioned automatic document feeder, for example, as shown in Japanese Patent Laid-Open No. 60-208746, a curved document conveyance path is formed between the document tray provided at the top of the copying machine body and the platen, While the document taken out from the document tray is being transported through the curved document transport path, the diagonal roller mechanism performs a side registration operation on the document, and when feeding the document onto the platen, the front edge of the document is This allows accurate positioning of the parts and sides.

Therefore, by registering the original as described above, the original fed onto the platen is accurately stopped at the copying position provided on the platen, and when scanned by the image reading device. This makes it possible to prevent misalignment of the original, and to obtain copies in good condition.

The above-mentioned means for diagonally feeding the original within the original transport path is, for example,
As shown in Publication No. 20222, etc., a diagonal roller and a pinch roller are arranged vertically opposite to each other across the document transport path, and both rollers tilt the document diagonally toward the side guide. Then, the document is conveyed along a guide.

(Problem that the invention attempts to solve) However, if the manuscript is thick,
In the case of thin paper such as Japanese paper or tracing paper, if the feeding force of the diagonal roller device is the same, the side registration effect cannot be exerted in the same way.

For example, in the case of diagonal feeding in a curved document transport path as described above, the force of diagonal feeding by the diagonal roller device is effective against thick paper because the resistance due to the effect of curving the paper is large. Without this, the registration effect may not be fully exerted. On the other hand, in the case of thin paper, when the paper is pressed against the side guide, the sides of the paper buckle, causing problems such as the paper not being able to be conveyed accurately. do.

In addition, in order to accurately register the leading edge of a sheet of paper that has been fed diagonally when it hits a gate in front of the platen and is stopped, a transport roller is used to accurately register the leading edge of the sheet. Although the pressure is applied with a certain amount of strong force,
At this time, if the center of the document transport path is even slightly off, the paper's leading edge registration will not work properly, causing problems such as slanted feeding when feeding onto the platen. .

In addition, in conventional paper conveyance devices, when paper is conveyed diagonally by a diagonal roller device, a set of diagonal rollers installed on the side of the document conveyance path is used for large-sized documents. A problem with using only the roller device is that it may not be possible to stably transport the paper along the curved transport path.

(Purpose of the invention) The present invention is to eliminate the drawbacks of the conventionally used devices as described above.The assist roller device is placed next to the diagonal roller device to compensate for the lack of conveying force due to the diagonal roller device. To provide a device capable of accurately performing a registration action on a document by correcting errors in the design of a curved conveyance path by correcting a gate device. The purpose is to

(Means and effects for solving the problem) The paper alignment device of the present invention transports the paper along the paper conveyance path while aligning the paper with the reference surface, stops the paper using the stop gate, and moves on to the next process. The present invention relates to a paper conveying device provided with a diagonal roller device for conveying the paper toward the destination.

In the apparatus of the present invention, an assist roller device is provided following the diagonal roller device in the middle of the curved conveyance path, and a platen conveyance roller device is provided in the document conveyance path between the end of the curved conveyance path and the platen. A gate device is provided.

The assist roller device is provided with a plurality of rollers on the shaft to compensate for the lack of conveying force due to the diagonal rollers, and the gate device is
The structure is such that the position can be adjusted with respect to the main body frame through a long hole provided in the bracket.

By being configured as described above, the paper position correction device of the present invention can reliably transport the paper in the paper transport path and perform registration, and when the paper reaches the gate, teeth,
Since the stopping position of the front edge of the paper can be set reliably, the original can be positioned accurately when fed onto the platen, making it possible to obtain copies in good condition. Become something.

(Example) The configuration of the paper position correction device of the present invention will be explained according to the illustrated example.

The curved conveyance path 10 shown in FIG. 1 is provided between the document tray and the platen, and is composed of a pair of parallel guide plates 11 and 11a, and is located at the top of the copying machine main body. The original to be sent out from the original tray is positioned along the side guide, and can be fed in according to the operation of the copying machine main body.

In the curved conveyance path 10 shown in this embodiment, a diagonal roller device 20 is installed in the middle of the document conveyance path.
and an assist roller device 30 is provided,
A platen conveyance roller device 40 and a gate device 50 are arranged between the terminal end of the curved conveyance path 10 and the platen.

In the diagonal roller device 20 shown in the above embodiment, the pinch roller 22 is swingably supported via an arm 23, and a spring 24 is disposed between the end of the arm 23 and the main body frame. The configuration is such that the pinch roller 22 can be pressed toward the diagonal roller 21 with a constant pressing force by the spring 24.

The pressing force of the pinch roller 22 is adjusted by an adjustment member slidably provided on the main body frame.
This can be easily done by moving the position of the spring 24 and changing the length of the spring 24, etc.

In the apparatus of the present invention, as shown in the exploded view of FIG. A diagonal roller device 20 is provided.

Further, an assist roller device 30 is disposed downstream of the device 20, and the assist roller device 30 is provided with a pinch roller 32 facing a drive roller 31. This pinch roller consists of a narrow roller 32 provided at a predetermined distance from a shaft 33. It is possible to add conveyance force along the conveyance path.

In the apparatus of the present invention, by arranging the diagonal roller device 20 and the assist roller device 30 as described above, the document that is diagonally fed by the diagonal roller device receives the feeding action only at its edges. On the other hand, each roller of the assist roller device 30 moves along the curved conveyance path 10 over the entire width of the document.
Convey in the feeding direction.

Then, by the conveying operation by the assist roller device 30, the local diagonal feeding effect on the document by the diagonal roller device is alleviated, and the document is moved toward the side guide 13 without applying large pressure to the document. , it is possible to perform the side registration function.

Furthermore, in the apparatus of the present invention, between the end of the curved conveyance path 10 and the introduction part of the platen,
A platen conveyance roller device 40 and a gate device 50 are arranged. In each of these devices, the platen conveyance roller device 40 is the assist roller device 3.
As in case 0, a plurality of rollers are arranged facing each other in the width direction of the document transport path,
This makes it possible to perform a uniform feeding action over the entire width direction of the document.

In addition, in the gate device 50, the gate 51 arranged to close the document conveyance path has a plurality of finger-shaped gates 51 arranged at a predetermined interval with respect to the axis. In this case, there is no need to perform a local locking action on the front end of the document, and the gate engages with the entire width of the front end of the document to perform a stopping action on the document.

As shown in FIG. 3, this gate device 50 is attached to a main body frame 59 using bolts 56, and a gate 51 is provided on a shaft 52 supported by a bracket 53.
By rotating the gate 51, the gate 51 can close and open the document conveyance path.

In the gate device 50 of the present invention, a long hole 54 is provided in a bracket 53 that supports the gate, and a bolt 55 protruding from a main body frame 59 is engaged with the long hole 54. The bracket 53 of the device 50 is moved along the elongated hole 54, positioned, and then tightened to secure the device.

Adjustment of the gate device is performed when the document conveyance path constituted by the curved conveyance path 10 is not set accurately with respect to the introduction part of the platen. This is to prevent all ends from being locally strongly pressed against the gate and causing buckling or the like.

That is, if the surfaces of the pair of guide plates constituting the curved conveyance path 10 are not formed with a constant curve shape or a constant center line, the curved conveyance path 10
The document conveyed through the gate does not contact the gate in a uniform manner. Then, when the document is stopped by the gate and further pressed with a weak force by the conveyance roller device, an inconvenient situation occurs in which the front end of the document is locally pressed and may be bent.

In contrast, by using a configuration like the gate device of the present invention, the position of the gate can be adjusted with respect to the document transport path, and each gate can be brought into uniform contact with the entire front edge of the document. It becomes something that can be done.

The manuscript once stopped by the gate is
When being carried out onto the platen, after the gate is released, the paper is fed by the platen conveying roller device 40 and is fed toward the conveying belt device on the platen.

Note that the operation of adjusting the document conveyance path of the gate device 50 can also be performed through long holes provided in the brackets 53 on both sides of the device, but it is also possible to perform the adjustment operation by forming a long hole in only one bracket. , the other bracket may be provided on the main body frame in a state where it can swing slightly.

The automatic document feeder 1 shown in FIG. 4 shows one embodiment of the paper position correction device of the present invention.
A conveyance belt 7 is provided on a platen 5 provided on the top surface of the copying machine body, and a curved conveyance path 10 is provided between the conveyance belt and an upper document tray 2.

Further, the document tray 2 is provided with a paper feed roller 3 for feeding documents, a paper handling mechanism, and a conveyance roller mechanism, and further includes a curved conveyance path 10.
A diagonal roller device 20 is provided at a predetermined position in the middle.

In the curved conveyance path 10 of the present invention, a gate device 50 and a platen conveyance roller device 40 are provided at the end of the path in front of the platen 5, and the curved conveyance path 10 is short-circuited so that the reverse path 16 A branch claw 17 is arranged between the curved conveyance path and the end of the curved conveyance path.

This reversing path 16 is used when reversing the original and copying the back side thereof.A conveyance roller is arranged at a predetermined position, and the reversing path 16 is used to reverse the original. It is designed so that it can be returned to the curved conveyance path 10 via.

Automatic document feeder 1 configured as described above
In the above, side registration is performed by the diagonal roller device 20 on the document taken out from the document tray 2 by the paper feed roller 3 and conveyed through the curved conveyance path 10 by the conveyance roller 4. The document is conveyed toward the gate 51 while being pressed against the side guides.

As described above, the original that has been temporarily stopped by the gate 51 and is waiting at the standby position 15a is
In response to instructions from the image reading device, etc. in the copying machine,
When the gate 51 is opened and the drive of the conveyance belt device 7 and the platen conveyance roller 40 are started, the platen is conveyed from the curved conveyance path 10 toward the platen 5, stopped at the copying position 6, and then transferred to the platen. Scanning is performed by an image reading device provided on the underside of the image, and a copy is made.

When copying the back side of a document, the conveyor belt 7 is driven in the reverse direction to return the document and the branch claw 17 is switched to return the document to the curved conveyance path 10 via the reversing path 16. is sent out onto the platen 5 again while facing the platen, and the back surface is scanned. After the copying process has been completed, the original is transferred to a discharge tray 8 by the belt 7.
It will be discharged towards.

Furthermore, in the above-described embodiments of the present invention, the case where the document is transported is explained, but the combination of the diagonal roller device, the assist roller device, the platen transport roller device, the gate device, etc. of the present invention is suitable for transporting the document. The present invention is applicable not only to the paper conveyance path inside a copying machine, but also to the paper conveyance path inside a copying machine, so that the registration function can be performed well even in the case of relatively thin paper. It becomes something that can be done.

Furthermore, the device of the present invention can be applied not only to copying machines but also to printers and other devices that handle cut paper. It can also be applied to.

(Effects of the invention) The paper alignment device of the present invention has the above-described configuration, and can improve the alignment accuracy when feeding the paper, as well as improve the accuracy of paper transport within a curved transport path. This makes it possible to effectively exert the force and improve the reliability of the paper handling device.

In addition, in the device of the present invention, when the paper is stopped by the gate, the leading edge of the paper is uniformly pressed against each gate member, so a strong local pressing force is applied to the leading edge of the paper. Problems such as buckling due to bending do not occur, thereby preventing troubles in handling the paper.

[Brief explanation of the drawing]

Fig. 1 is a side view of the curved conveyance path of the present invention, Fig. 2 is a developed view of the curved conveyance path of Fig. 1, Fig. 3 is a side view of the gate device, and Fig. 4 is a side view of the curved conveyance path of the present invention. FIG. 2 is an explanatory diagram of an automatic document feeder. Symbols in the figure: 1... automatic document feeder, 10...
...Curved conveyance path, 13...Side guide, 15...
Registration sensor, 16... Reversing path, 20... Diagonal roller device, 21... Diagonal roller, 22... Pinch roller, 23... Arm, 30... Assist roller device, 31... Drive roller, 32... Pinch Roller, 40...Platen conveyance roller device, 50...
...Gate device, 51...Gate, 53...Bracket, 59...Body frame.

Claims (1)

[Claims for Utility Model Registration] A diagonal roller device is provided to convey the paper along the paper conveyance path while aligning it with a reference surface, stop it with a stop gate, and carry it out for the next process. In the paper conveyance device, an assist roller device is provided following the diagonal roller device in the middle of the curved conveyance path, and a platen conveyance roller device and a gate are provided in the document conveyance path between the terminal end of the curved conveyance path and the platen. a device, the assist roller device is configured to have a plurality of rollers on the shaft to compensate for the lack of conveying force due to the diagonal roller device, and the gate device is configured to support its bracket with respect to the main body frame. 1. A paper alignment device characterized in that the paper alignment device is configured such that the position can be adjusted through a long hole provided in the paper.