JPH0367832A - Paper transfer device - Google Patents

Abstract

PURPOSE:To prevent a guide member from being left under the opened condition of a pivoted transfer path by providing on the inner surface of a front cover a stopper abutting against the guide member while the intermediate portion of the transfer path is opened by pivoting the guide member to disable the closing of an opening of the front cover. CONSTITUTION:After the completion of removal of a jammed blank, a movable part 30b1 is pulled up to engage an engaging mechanism 45 and close a front cover 48 under such a condition. Then, if the pulling-up of of the movable part 30b1 is forgotten to leave the intermediate portion of a transfer path 30 to be opened, when a front cover 48 is intended to be closed, a stopper 50 inside said cover abuts against a handle 44 of the movable part 30b1. The closing of the front cover 48 is disabled by such abutment, so that the oblivion of the pulling-up operation of the movable part 30b1 is noticed and thus the movable part 30b1 is always returned to the regular aligned condition without leaving the movable part 30b1 to be pivoted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a paper conveyance device provided in an electronic copying machine or the like.

(Prior Art) For example, in an electronic copying machine that performs double-sided copying or superimposed copying, a paper conveying device is installed on the bottom side thereof. This paper conveyance device has an opening in the front, a front cover is opened in this opening, and a conveyance path is provided inside the paper conveyance device, which is made up of a pair of guide members spaced apart from each other and facing each other. It is being After the image is transferred to the paper by the image forming unit in the electronic copying machine, the paper is accumulated in the stacking unit through the conveyance path in the paper conveying device, and the accumulated paper is conveyed to the image forming unit again. to transfer the image.

By the way, while conveying paper, the paper may jam and become jammed in the middle of the conveyance path. In such cases, the guide member that makes up the conveyance path can be rotated to remove the paper from the middle of the conveyance path. The paper is opened and the jammed paper is removed from the conveyance path by such an operation.

(Problem to be Solved by the Invention) However, after rotating the guide member to remove the jammed paper, the guide member is left in the rotated state without returning to its original normal state. There are cases where the front cover is closed, and in such a case, there is a problem in that the paper jams and becomes jammed in the conveyance path again the next time the paper is conveyed.

The present invention has been made with attention to these points, and its purpose is to provide a paper conveyance device that can reliably prevent inconveniences such as forgetting to return the guide member to its original state. It's about doing.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention has an opening in the front, a front cover is provided in the opening so that it can be opened and closed, and the inside is provided with a conveyance path composed of a pair of guide members spaced apart from each other and facing each other, the sheet is conveyed through this conveyance path, and one of the guide members forming the conveyance path is rotatably supported. , in which the middle part of the conveyance path can be opened by rotating the guide member, the inner surface of the front cover is in contact with the guide member when the guide member is rotated to open the middle part of the conveyance path. A stopper is provided to prevent the front cover from closing with respect to the opening.

(Function) In this configuration, when paper jams and becomes jammed in the conveyance path, the front cover is opened, the guide member of the conveyance path is rotated, the conveyance path is opened, and the jammed paper is cleared. Remove the paper.

After paper removal is completed, the guide member is returned to its original state and the front cover is closed. However, at this time, it is possible to forget to return the guide member to its original state and leave the transport path open. If the front cover is closed, the stopper inside the front cover will come into contact with the guide part, and this contact will make it impossible to close the front cover, making it difficult to return the guide member to its original position. There is no possibility that the user will realize that he/she has forgotten the guide member and therefore leave the guide member unrotated.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

3 to 5 show the overall external appearance of the electronic copying machine and the paper conveyance device. In the figure, 1 is the copying machine main body, and a document feeding device 2 that also serves as a document cover is provided on the top surface of the copying machine main body 1. Also, a paper conveying device 3 is provided on the bottom side of this copying machine main body 1.
is provided.

As shown in FIG. 2, inside the copying machine body 1, a photosensitive drum 4 constituting an image forming section is provided.The surface of the photosensitive drum 4 is charged by a charging device 5, and then the original is charged. An electrostatic latent image is formed on the surface of the image by slit exposure at the exposure section ph.

The electrostatic latent image formed on the surface of the photosensitive drum 4 is formed by toner being deposited by developing units 6a and 6b, each of which contains red or black toner, and which is selectively driven as necessary. Visualized.

On the other hand, sheets are taken out one by one from the selected upper paper feed cassette 10a or lower paper feed cassette 10b, guided through paper guide paths 11a and llb to a pair of registration rollers 12, and from this pair of registration rollers 12 to a photosensitive drum 4.
The image is sent to the transfer section on the outer periphery of the image.

The paper sent to the transfer section comes into close contact with the surface of the photosensitive drum 4 at the transfer charger 15, and the toner image on the photosensitive drum 4 is transferred by the action of the transfer charger 15. The transferred paper is electrostatically peeled off from the photosensitive drum 4 by the action of the peeling charger 16 and sent to the fixing section 18 via the conveyor belt 17, where it is transferred via the fixing roller 19. The toner image is fixed. The sheet after fixing is sent out from the fixing unit 18 through a pair of sending rollers 20, and after the transfer, the residual toner on the surface of the photosensitive drum 4 is removed by a cleaner 21, and the residual image is further erased by a static elimination lamp 22. It is set to return to the initial state.

A paper transport device 3 provided on the lower surface side of the copying machine main body 1 takes the paper sent out from the pair of delivery rollers 20 into the paper transport device 3 or discharges it to the outside of the paper transport device 3. For sorting, a gate 25 is provided, and a pair of sending rollers 26 is provided near the gate 25, and for sorting, the paper guided by the gate 25 to the pair of sending rollers 26 is transferred to the paper conveying device 3. The paper is ejected to a paper ejection tray 27 provided outside.

In addition, the paper taken into the inside of the paper conveyance device 3 by the gate 25 is guided to the conveyance path 30,
0, a plurality of roller pairs 31, 32, 33, 34 are provided at predetermined intervals along the longitudinal direction, and the paper guided to the conveying path 30 is sequentially conveyed by these roller pairs 31 to 34, and the leading edge of the sheet is conveyed sequentially by these roller pairs 31 to 34. The stacking section 35 is arranged below the transport path 30.

The stacking section 35 is provided with a take-out roller 37, and the paper stored in the stacking section 35 is taken out by the take-out roller 37.

Then, the sheets taken out from the stacking section 35 are sent to the guide section 39 via a separation roller 38 that separates and conveys the sheets one by one. This guide section 39 is composed of a pair of guide members 39a and 39b facing each other and spaced apart from each other, and above this guide section 39 is a pair of delivery rollers 40a.
40b is provided, the paper is sent to the guide section 39 via the separation roller 38, and further sent out from the guide section 39 into the copying machine main body 1 via the delivery roller 40, and the sent paper passes through the guide path 41. It is designed to be guided to a pair of registration rollers 12.

The conveyance path 30 is constituted by a pair of guide members 30a and 30b that face each other and are spaced apart from each other in the vertical direction. Of these guide members 30a and 30b, a section ρ in the middle of the guide member 30b disposed on the lower side is supported as a movable portion 30b so as to be rotatable downward via a hinge 43°43.

A handle 44 for operation is attached to the upper surface of the free end side of this movable portion 30b1, and normally this movable portion 30b1 is removably locked in a locking mechanism 45 as shown by the solid line in FIG. and held in a horizontal position.

An opening 47 is formed in the front surface of the paper conveying device 3, and a front cover 48 is rotatably attached to the opening 47 via hinges 49, 49. A stopper 50 is attached so as to protrude inside the opening 47.

During double-sided image formation, the gate 25 rotates upward, and the paper P on which the image of the first document is formed on one side is introduced into the conveyance path 30 through the gate 25. They are sequentially discharged through this conveyance path 30 into a stacking section 35 and stacked.

Then, the sheets P accumulated in the stacking section 35 are taken out via the take-out roller 37, separated one by one by the separation roller 38, and sent to three guide sections.
from the guide path 4 in the copying machine main body 1 through the delivery roller 40.
It is sent inverted to 1.

Thereafter, the paper P is aligned by the pair of registration rollers 12 and is again sent between the photosensitive drum 4 and the charging device 5, so that the image of the second document is formed on the other side. The paper P, on which images have been formed on both sides in this manner, passes through the conveyance belt 17, the fixing roller 19, the delivery roller 20, the gate 25 for sorting, and the delivery roller pair 26 in order, and then passes through the delivery tray 27.
0 is emitted.

By the way, if the paper P transported in this way jams and becomes jammed in the transport path 30, first open the front cover 48 and then move the guide member 30b as shown by the chain line in FIG. A handle 44 provided on the portion 30b+
is held with one hand and pulled down, and the movable part 30bl is rotated downward about the hinge 43. And movable part 30b1
The movable part 30 is moved by bringing the free edge of the
b1 is supported in an inclined state. By such an operation, the middle of the conveyance path 30 is largely opened, and since the movable part 30b1 is rotated downward, the open state is maintained even if the hand is removed from the handle 44, and therefore both hands can be used freely. Thus, the paper P stuck in the conveyance path 30 can be easily and efficiently removed. Furthermore, the movable section 30b+ can be rotated within a space previously secured as the stacking section 35 in the paper conveyance device 3, and therefore there is an advantage that there is no need to provide a dedicated space for it.

1. After the removal of the paper P is completed, the movable portion 30b1 is pulled up and locked by the locking mechanism 45, and the front cover 48 is closed in this state. At this time, if you forget to pull up the movable part 30b and leave the middle of the conveyance path 30 open,
When the front cover 48 is about to be closed, the stopper 50 inside it comes into contact with the handle 44 of the movable part 30b1, and this contact makes it impossible to close the front cover 48, which prevents the pulling operation of the movable part 30b1. The movable part 30b will not be left unturned due to realizing something has been forgotten, and the movable part 30b will always be turned.
1 is returned to its normal closed state.

In the above embodiment, the guide member on the lower side constituting the conveyance path is rotatable to open the conveyance path, but the guide member on the upper side may be configured to be rotatable. There is no problem.

In addition, the present invention can be implemented with various modifications without changing the gist thereof.

2 [Effects of the Invention] As explained above, according to the present invention, there is an opening in the front surface, a front cover is provided in the opening so as to be openable and closable, and a pair of guides facing each other and spaced apart are provided inside. A conveyance path made up of members is provided, the paper is conveyed through this conveyance path, and one of the guide members constituting the conveyance path is rotatably supported. In the case where the front cover is made openable, the inner surface of the front cover is abutted against the guide member when the guide member is rotated to open the middle of the conveyance path, thereby closing the front cover to the opening. Since a stopper is provided to disable the paper, after rotating the guide member to open the conveyance path to remove the paper, try closing the front cover without returning the guide member to its original normal state. However, this is not possible, and therefore there is an advantage that the guide member is not left in the rotated conveyance path in an open state.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a configuration diagram of the main parts, FIG. 2 is a configuration diagram showing the internal structure of an electronic copying machine and a paper conveyance device, and FIG. 3 is a configuration diagram of an electronic copying machine and a paper conveyance device. FIG. 4 is a perspective view showing the appearance of the apparatus, FIG. 4 is a perspective view of the paper transport device with the front cover open, and FIG. 5 is a perspective view of the paper transport device with the transport path opened. 30... Conveyance path, 30a, 30b... Guide member,
47...Opening, 48...Front cover 50...
・Stopper.

Claims (2)

[Claims] (1) It has an opening in the front, a front cover is provided in the opening so that it can be opened and closed, and a conveyance path is provided inside the opening, which is made up of a pair of guide members spaced apart from each other and facing each other.
The paper is conveyed through this conveyance path, and one of the guide members constituting the conveyance path is rotatably supported;
In the device in which the middle of the conveyance path can be opened by the rotation operation, the inner surface of the front cover is brought into contact with the guide member when the guide member is rotated to open the middle of the conveyance path. A paper conveyance device comprising a stopper that makes it impossible to close the opening of the front cover. (2) It is provided on the bottom side of the electronic copying machine and has an opening on the front side, a front cover is provided in this opening so that it can be opened and closed freely, and the inside is composed of a pair of guide members that face each other and are spaced apart from each other. The paper is conveyed to the electronic copying machine through this conveyance path, and one of the guide members constituting the conveyance path is rotatably supported, and the rotation operation causes the sheet to be conveyed. In the device in which the middle of the transport path can be opened, the opening of the front cover contacts the inner surface of the front cover when the guide member is rotated to open the middle of the transport path. 1. A paper conveyance device for an electronic copying machine, characterized in that it is provided with a stopper that makes it impossible to close the sheet.