JPH0213938A - Clamshell copying machine - Google Patents

Abstract

PURPOSE:To dispense with the interchange of a gas balancer by providing slidably an automatic document feeder over some range on the rail of the upper part of the copying machine, and dislocating the automatic document feeder from the upper part of the copying machine at the time of opening the upper part of the copying machine. CONSTITUTION:A document feeding part 12 and a document turning over part 13 are provided slidably over the range of sliding acceptability limit on the slide rail 4. The position of this sliding acceptability limit is fixed so that the document feeding part 12 is dislocated from the upper part of a document placing plate 31 when the document feeding part 12 is slided up to the sliding acceptability limit. When the upper part of the copying machine 30 is opened, the automatic document feeder 10 is dislocated from the upper part of the copying machine 30 in the distant direction away from the gas balancer 17. Thus, the less power of the gas balancer is needed so that the interchange of the gas balancer is made unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamshell copying machine equipped with an automatic document feeder.

2. Description of the Related Art The clamshell copying machine described above has conventionally been constructed as shown in FIG. That is, a lower part 20 of the copying machine having a recording paper transport section, an upper part 30 of the copying machine located above this and containing an image forming part, and a document placement surface 3 of the upper part 30 of the copying machine.
1, an automatic document feeder 100 is fixed in a state where the front side can be opened, and the upper part 30 of the copying machine can be opened and closed around the horizontal axis 18 at one end with respect to the lower part 20 of the copying machine, and It can be maintained in an open state by a gas balancer 17 at the other end.

By the way, the automatic document feeder 100 can be attached to a copying machine as an option, and in a copying machine with this installation, the upper part 30 of the copying machine Due to the increased weight of the gas balancer, it was necessary to replace it with one that had stronger elasticity than the gas balancer that was originally installed, which made the gas balancer that was originally installed useless and took time to replace.

Further, as described above, since the automatic document feeder 100 is provided on the upper part 30 of the copying machine, if the document placed on the document placement surface 31 is, for example, a thick book, the automatic document feeder 100
There was a problem that even when the front side of the 00 was opened, it got in the way and was difficult to handle.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a clamshell copying machine that does not require replacing the gas balancer and is easy to handle even when the original placed on the original placing surface is thick. do.

The clamshell copying machine according to the present invention includes an upper part of the copying machine containing an image forming section and a lower part of the copying machine having a recording paper conveying section, which can be freely opened and closed around a horizontal axis. In a clamshell copying machine in which an automatic document feeder is provided on a document placement surface on an upper part of the copying machine, a rail is disposed on the upper part of the copying machine in a direction perpendicular to the axis of the horizontal axis. On this rail, the automatic document feeder is placed in a fixed position on the document placement surface when the document is automatically fed, and in a fixed position on the document placement surface when the top of the copying machine is opened from the bottom of the copying machine. It is characterized in that it is provided so as to be slidable along the rail between the retracted position and the retracted position.

Raw-U In the present invention, the automatic document feeder is provided so as to be able to slide within a range on a rail provided above the top of the copying machine, and when the top of the copying machine is opened, By shifting the document feeder in the direction away from the gas balancer with respect to the top of the copying machine, the force required for the gas balancer is reduced.Also, by shifting the position of the automatic document feeder, it is possible to handle thick documents. Easy to handle even in the case of

Fruit - Honesty The present invention will be explained based on FIGS. 1 to 9.

[Clamshell copier]

FIG. 8 is a longitudinal sectional view showing a clamshell copying machine according to the present invention. This copying machine has a clam shell in which an upper part 30 containing an image forming section is provided so as to be openable and closable around a horizontal axis 18, as shown in FIG. An automatic document feeder 10 is provided on the upper part 30 of the copying machine.

[Configuration of the upper part of the copier]

A transparent original plate 31 is provided on the upper surface of the upper part 30 of the copying machine, and a light source 32 is arranged below this plate. Light from this light source 32 is irradiated onto the original via the original placing plate 31, and this reflected light passes through a reflecting mirror 33, a condensing lens 34, and a reflecting mirror 35, and is exposed to a slit on the surface of the photosensitive drum 36. .

Around the photosensitive drum 36, a charging charger 37, a developing device 38, a transfer charger 39, a separation charger 40,
A cleaning device 41 and an erase lamp 42 are provided. Prior to exposure, the surface of the photosensitive drum 36 is charged by a charging charger 37, and the photosensitive drum 36 is rotated in the direction of the arrow to expose the exposure area to form an electrostatic latent image corresponding to the original. Furthermore, the photosensitive drum 3
6 is rotationally driven and when the electrostatic latent image reaches a position facing the developing device 38, toner is adhered to the surface of the photosensitive drum 36 by the developing device 38 by electrostatic force. As a result, a toner image corresponding to the electrostatic latent image is formed on the surface of the photosensitive drum 36. Thereafter, the toner remaining on the photosensitive drum 36 after the transfer to be described later is removed by the cleaning device 4.
1 and erased by the erase lamp 42. Such image formation is performed in the upper part 30 of the copying machine.

[Configuration of the lower part of the copier]

On the other hand, a paper feed cassette 21 is provided in the lower part 20 of the copying machine, and a transfer material 22 in this cassette is fed by a paper feed roller 23, passes between conveyance rollers 24, and has its leading end positioned at a registration roller 25. guess and wait. This transfer material 22 is supplied between the transfer charger 39 and the photosensitive drum 36 in synchronization with the rotation of the photosensitive drum 36, and comes into contact with the toner image on the photosensitive drum 36. At this position, the transfer charger 39 applies a charge of opposite polarity to the toner to the back surface of the transfer material 22, and the toner image on the photosensitive drum 36 is transferred to the transfer material 22.

At this time, the transfer material 22 adheres to the surface of the photosensitive drum 36 by magnetic attraction, so the separation charger 40 applies a charge of opposite polarity to that of the transfer charger 39 to eliminate the previous charge, thereby increasing the stiffness of the transfer material 22 itself. It is separated from the photosensitive drum 36 by force and further by a separation claw (not shown). The separated transfer material 22 is conveyed by an endless conveyor belt 27, fixed by a heat fixing roller 28, and discharged onto a paper discharge tray 29. Such conveyance is carried out at the lower part 20 of the copying machine.
If a jam occurs in the transfer material 22, as shown in FIG. The upper part 30 of the copying machine can be opened on the right side with respect to the lower part 20 of the copying machine.

(Configuration of automatic document feeder) Automatic document feeder 10 provided above the upper part 30 of the copying machine
is for automatically feeding the original for copying onto the original placing plate 31, and as shown in FIG.
It is divided into three parts: a document conveying section 12 and a document reversing section 13, and the document carrying section 11 is fixedly installed on the upper right side of the upper part 30 of the copying machine.

As shown in FIG. 1, on the upper surface of the upper part 30 of the copying machine, slide rails 4° 4 are arranged in a direction perpendicular to the axis of the horizontal shaft 18, in front and behind the document placement plate 31. There is. As shown in FIG. 5 (right side view) and FIG. 6 (left side view), the slide rail 4 has a lower rail 4a fixed to the upper surface of the upper part 30 of the copying machine, and an upper rail 4b above this. On the upper surface of the upper rail 4b, the document transport section 12 and the document reversing section 13 are attached in this order from the document carrying section 11 side, and as shown in FIG. 13 is slidable within the slide tolerance of the slide rail 4.

The position of this slide permissible limit is determined so that when the document transport section 12 is slid to the slide permissible limit, the document transport section 12 comes off the top of the document placement plate 31.

The slide rail 4 also includes the document reversing section 13.
The bottom surface of is fixed. In addition, 9 is the upper rail 4b.
This connector is connected to the original transport unit 12 by a cord (not shown), and when the original transport unit 12 is opened, it remains on the upper rail 4b as shown in FIG. 5 and the original is transported. 11 remains connected to its counterpart.

The document conveyance unit 12 is provided with hinges 5.5 on both sides of the rear end of the lower surface so as to open the front side (see FIG. 1), and these hinges 5, 5 slide the rear side of the document placement plate 31. Magnets 6.6 are attached to the rail 4, and magnets 6.6 attached to both sides of the front end of the lower surface when the document transport section 12 is closed.
is located on the front slide rail 4 and can be fixed.

Further, as shown in FIG. 3 (rear view), the document transport unit 12 is slid between the regular position A on the document placement plate 31 when automatically feeding the document and the position B at the slide tolerance limit. Also, so that the document transport section 12 is stopped by an appropriate force,
At the two positions A and B, the upper surface portions of the copying machine upper part 30 located below the hinge 5, ie, a, b, and c, are provided with rollers 7 whose upper parts are moved from the slide rail 4, as shown in FIG. The hinge 5 is attached via a temporary spring 8 in a state where it is exposed upward, and a roller retaining hole 5a is formed in the hinge 5, into which the upper part of the roller 7 enters. Note that 30a is an opening for allowing the leaf spring 8 to move up and down.

Therefore, when copying a thick book, it is recommended to open the document transport section 12 as shown in FIG. 1, or to slide the document transport section 12 and document reversing section 13 as shown in FIG. Bye.

In addition, if a paper jam or the like occurs and the upper part 30 of the copying machine is to be opened, the upper part 30 of the copying machine can be opened after sliding the document transport section 12 and the document reversing section 13 as shown in FIG. , the force applied to the gas balancer 17 can be reduced, and there is no need to replace it.

In the above embodiment, the document transport section 1 of the automatic document feeder is
2 and the document reversing section 13, however, the present invention is not limited to this, and the document carrying section 11 may also be slid together.

Furthermore, although a slide rail is used in the above embodiment,
It goes without saying that the present invention is not limited to this, and can also be implemented in a structure in which a simple rail is laid on the upper part of the copying machine, and wheels running on the rail are provided on the automatic document feeder side.

Further, in the embodiment described above, the sliding amount is limited using the slide rail, but the present invention is not limited to this, and the automatic document feeder may be stopped using another stopper mechanism.

As described in detail above, in the case of the present invention, the automatic document feeder is provided so as to be able to slide over a range on a rail above the top of the copying machine, so that when the top of the copying machine is opened, By shifting the automatic document feeder to the top of the copier, the force required for the gas balancer can be reduced.
This eliminates the need to replace the gas balancer, and provides excellent effects such as allowing thick originals to be easily placed on the original placement surface.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the document transport section, which is the main part of the apparatus of the present invention, in an open state, FIG. 2 is a perspective view showing the document transport section in a slid state, and FIG. 3 is a perspective view of the document transport section. Fixed position A
FIG. 4 is a view showing the vicinity of the slide rail, FIG. 5 is a view of the document transport section as seen from the right side, and FIG. 6 is a view of the document transport section as seen from the left side. , 7th
The figure is a perspective view when the document conveying section is in the normal position, FIG. 8 is a vertical cross-sectional view showing the entire clamshell copying machine according to the present invention, and FIG. 9 is a front view showing the state in which the top of the copying machine is opened. , FIG. 10 is a front view showing a state in which the top of the copying machine is opened in a conventional apparatus. 4...Slide rail, 7...Roller, 10...Automatic document feeder, 11...Document loading section, 12...Document transport section, 13...Document reversing section, 17... Gas balancer, 18...horizontal axis, 20...bottom of copying machine, 3
0...Top of copying machine. Patent applicant: Minolta Camera Co., Ltd. Figure 1 Figure 7

Claims (1)

[Claims] (1) The upper part of the copying machine containing the image forming section is installed in the lower part of the copying machine having the recording paper conveying part so that it can be opened and closed around a horizontal axis, and the automatic document feeder is mounted on the document placement surface of the upper part of the copying machine. In a clamshell copying machine, a rail is disposed above the top of the copying machine in a direction perpendicular to the axis of the horizontal axis, and the automatic document feeder is arranged to feed the original on this rail. It is provided so that it can slide along the rail between a fixed position on the document placement surface during automatic feeding and a retracted position off the document placement surface when the top of the copying machine is opened from the bottom of the copying machine. A clamshell copying machine characterized by: