JP2934786B2 - Image forming device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus provided with an automatic document feeder on an upper part.

[Conventional technology]

In one of the above-described image forming apparatuses, an automatic document feeder is provided at an upper portion of the image forming apparatus main body, and a document tray is pivotally attached to a discharge section of the automatic document feeder so that the document tray can be turned to the transport section side. On the other hand, the automatic document feeder opens a toner supply port for the developing device of the image forming means on the upper plate of the image forming apparatus main body below the document receiving tray, and attaches a lid for closing the toner supply port. Some are pivotally attached to the side lip.

[Problems to be solved by the invention]

To supply the toner to the toner supply port in such an image forming apparatus, the document receiving tray must be turned over toward the transport section, and the lid must be further opened, and then the lid is opened. It is necessary to close the document tray and switch the document tray to the document receiving position, which is troublesome and often leaves room for improvement in that it is easy to forget to close the lid.

SUMMARY OF THE INVENTION It is an object of the present invention to simplify a toner supply operation by a rational improvement technique of linking a cover with a document tray whose posture is changed.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, in the above-described image forming apparatus, an interlocking mechanism is provided between the document tray and the lid, and the lid is turned over as the document tray is turned to the transport unit side. It is characterized in that the lid is closed and the lid is closed when the original receiving tray is switched to the original receiving position.

[Action]

According to the above-mentioned characteristic configuration, the lid is opened by one operation of turning the original tray toward the transport unit side, and the lid is closed by one operation of switching the original tray to the original receiving position. You.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an electrostatographic copying machine as an example of an image forming apparatus, in which a paper feed deck 1 is provided on a paper feed unit side, and a paper discharge tray side is replaced with a paper discharge tray 2 as necessary. 3 and an automatic document feeder 4 is provided at the upper part.

Inside the image forming apparatus main body 5, a charging device 6, a developing device 7, a transfer device 8, a sheet separating device 9, a cleaning device
An image forming means 12 having the photoreceptor 11 arranged on the periphery of the photoreceptor 11, a sheet conveying means 13 to the transfer device 8, a sheet conveying means 15 to the fixing device 14, and a discharge tray 2 or a sorter 3. Paper output unit 16, an intermediate tray 17 for stocking paper after image formation for composite copying, and an optical system movable exposure device 18
Is equipped.

The automatic document feeder 4 includes a document feeder 19 that automatically feeds the document a, a transporter 21 that transports the document a from the document feeder 19 to a predetermined position on the contact glass 20, and The original a fed from the transport unit 21 is transferred to the first original tray 22 on the downstream side in the sheet discharging direction and the second original tray 23 on the upper surface of the transport unit 21.
As shown in FIGS. 2 and 3, the first document tray 22 includes a paper discharge section 24 for selectively discharging paper.
It is pivotally attached to the paper discharge port of the paper discharge unit 24 via the horizontal axis 25, and is configured to be switchable between a document receiving posture in which the document receiving surface is inclined and a posture in which the document receiving surface is turned to the conveying unit 21 side. Have been.

The free end of the first document receiving tray 22 is
The tray bracket 27 is brought into contact with the housing 26 of the paper discharge unit 24 immediately before the plunger enters the opening / closing locus P.
In the switching state to the transport unit 21 side, the transport unit
21 can be opened and closed safely.

On the other hand, the transport unit 21 is configured to be openable and closable about an axis perpendicular to the pivot axis of the first document tray 22, and to manually feed a document a such as a cut sheet or a book as needed. Is available.

A plate for opening a toner supply port 30 for the toner supply hopper 29 of the developing device 7 and a plate for closing the toner supply port 30 are provided on the upper surface plate 28 of the image forming apparatus main body 5 below the first document tray 22. A lid 31 is pivotally attached to an edge of the toner supply port 30 on the automatic document feeder 4 side via a horizontal axis 32 parallel to the horizontal axis 25 of the first document tray 22. .

A link 33 is pivotally mounted on the lower surface of the first document receiving tray 22 at the middle in the longitudinal direction so as to be swingable around a pin b parallel to the horizontal axis 32, and a long hole is formed in the free end of the link 33. c
On the other hand, a pin d is provided at the free end of the lid 31,
Further, the pin d is inserted through the elongated hole c, and the first
An interlocking mechanism A is configured to open the cover 31 when the document tray 22 is turned to the transport unit 21 side and close the cover 31 when the first document tray 22 is switched to the document receiving position. I have.

When the first document tray 22 is turned down toward the conveying section 21 and the lid 31 is opened, the automatic document feeder 4 and the toner replenishing device are opened by the lid 31 and the first document tray 22. The mouth 30 is configured to be isolated.

According to the above configuration, the first document receiving tray 22 is
The lid 31 is opened by one operation of turning the document tray to the side, and the free end of the first document tray 22 is moved by the open / close trajectory P Since it is located outside, the transport unit 21 can be opened and closed safely without damaging the first document tray 22.

In addition, since the lid 31 and the first document receiving tray 22 serve as partition walls and separate the automatic document feeder 4 from the toner supply port 30, even if toner scatters during toner supply, It is possible to effectively prevent the toner from adhering to the cover of the automatic document feeder 4 or entering the inside of the paper discharge unit 24 to stain the document a.

The lid 31 is closed in conjunction with switching the first document tray 22 to the document receiving position.
Forgetting to close 31 is reliably prevented.

〔The invention's effect〕

As described above, according to the image forming apparatus of the present invention,
By interlocking the lid with the document tray whose posture is changed, there is no need to open and close the lid with respect to the toner supply port. It was avoided.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional side view of an image forming apparatus equipped with an automatic document feeder, and FIGS. 2 and 3 are explanatory views showing an interlocking state of a lid with respect to a document tray. 4 ... automatic document feeder, 5 ... image forming apparatus main body, 7
... developing device, 12 ... image forming means, 21 ... transport section, 22 ...
Document receiving tray, 24 discharge section, 28 top plate, 30 toner supply port, 31 lid, A link mechanism, P opening / closing locus.

Continuation of the front page (56) References JP-A-54-96048 (JP, A) JP-A-54-102129 (JP, A) JP-A-57-118266 (JP, A) JP-A-58-100152 (JP) JP-A-62-81677 (JP, A) JP-A-62-283368 (JP, A) JP-A-2-113270 (JP, A) JP-A-3-110586 (JP, A) 4-128551 (JP, A) JP-A-63-174073 (JP, A) JP-A-62-1201774 (JP, A) JP-A-3-200173 (JP, A) JP-A-1-200380 (JP, A) A) Fully open 1979-167237 (JP, U) Fully open 60-59265 (JP, U) Fully open 1985-6040971 (JP, U) Fully open 1986-50969 (JP, U) Fully open -106945 (JP, U) Fully open 63-70568 (JP, U) Really open 63-101949 (JP, U) Really open 63-115149 (JP, U) Really open 64-1551 (JP, U) ) Hikaru Hei 2-41255 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G03G 15/08-15/095 G03G 15/00 1 07 G03G 15/00 550 G03G 21/16-21/18

Claims (3)

(57) [Claims] An automatic document feeder is provided at an upper portion of an image forming apparatus main body, and a document tray is pivotally mounted on a discharge portion of the automatic document feeder so that the document tray can be turned over to a transport portion side. A toner supply port for the developing device of the image forming means is opened in the upper surface plate of the image forming apparatus main body at a lower portion of
In an image forming apparatus in which a lid for closing the toner supply port is pivotally attached to an edge of the automatic document feeder, an interlocking mechanism is provided between the document tray and the lid, and the document tray is conveyed to the conveyance unit side. An image forming apparatus, wherein the cover is opened as the document is turned over and the cover is closed as the document tray is switched to the document receiving position. 2. The automatic document feeder according to claim 1, wherein the transport unit of the automatic document feeder is configured to be openable and closable about an axis perpendicular to a pivot axis of the document tray. The image forming apparatus according to claim 1, wherein the free end portion of the image forming apparatus is configured to be positioned outside the opening / closing locus of the transport unit. 3. The image according to claim 1, wherein the automatic document feeder and the toner supply port are separated by the cover and the document receiving tray when the cover is opened. Forming equipment.