JPS62205329A - Original platen driving device for recorder - Google Patents

Abstract

PURPOSE:To integrate constituent members, and to decrease the number of members and to facilitate their assembly by forming a rack which engages the pinion of a driving source integrally on the reverse surface of an original platen. CONSTITUTION:The original platen 31 is provided with platen glass 2 successively and the rack 37 which engages the pinion 30 of the driving source is formed integrally on the reverse surface. The other end of the platen glass 2 is supported by a cantilever piece 35 and a guide member 51 is provided between the original platen 31 and a main body through bearings 33 and 34. In this constitution, when the pinion 30 rotates, the original platen 31 is moved between the front side and inner side. Consequently, the constituent members are integrated, so the number of parts is decreased, the assembly is facilitated, and the operation efficiency is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a document table drive device used in a recording device such as a moving document table type electrophotographic copying device, and particularly to a document table drive device that can be easily assembled. The present invention relates to a document table driving device.

[Prior art]

Generally, in an image recording device using an electrophotographic process, such as an electrophotographic copying device, an original image is read and exposed to light by an optical system on the surface of a photoreceptor drum, which is an image carrier, and a static image is thereby formed. A toner image is formed from the electrolytic latent image by a developing device, this toner image is transferred onto a sheet of paper, and the toner image is fixed on the sheet by a fixing device and then discharged.

There are two ways to read an original: one is to fix the original and move the optical system, and the other is to fix the optical system and move the original.In order to make the electrophotographic copying device itself more compact, it is possible to move the original. A movable document table type is often used.

FIG. 3 is a schematic diagram of a document plate driving device used in a document plate movable type recording device, in which a document glass table 48 on which a document is placed is shown.
The original glass table 48 is connected to the negative side thereof, and the other side of the document glass table 48 is provided with a support piece 4 on the upper part of the main body of the recording apparatus.
9, and a guide member is located between the document table 44 and the main body. , a guide member 50 that covers the rail 47;
It is composed of steel balls 45 and 46 located between the rail 47 and the guide member 50, and the document glass table 48 and the document table 44 integrated therewith move only toward the front or back in FIG. It is possible.

A rack 41 is attached to the document table 44 by a support member 43 and a clip 42 provided on the rack 41, and a pinion 40 meshingly engages with the rank 41.
During rotation, the document table 44 and the document glass table 48 can move together with the rack 4I toward the front or back in FIG. 3.

[Problem that the invention seeks to solve]

However, the rack 4 of the document platen drive device shown in FIG.
1. Metal materials are generally used for pinions 40 and the like due to their durability, and since the individual parts are manufactured separately and then assembled, there is a problem that there are many parts and the assembly process takes a lot of time and effort. .

This invention solves the above-mentioned problems of the conventional devices, and reduces the number of components by integrating the components, and provides a document table drive device in a recording device that can be easily assembled. The purpose is to provide.

[Means for solving problems]

In order to solve the above problems, the present invention has a structure in which a rank provided for moving the document table and the document table are integrated.

[Effect]

By employing the above-mentioned means, the present invention can greatly improve work efficiency because the number of members is reduced and the assembly does not require much effort.

〔Example〕

Embodiments of the invention shown in the drawings will be described below.

FIG. 1 shows an overall schematic diagram of an electrophotographic copying apparatus in which the apparatus according to the present invention is installed, in which a document glass stand 2 is mounted on the top surface of a main body 1 so as to be reciprocatable in the horizontal direction (left and right directions in the figure). is installed, and its upper surface is opened/
A coverable platen cover 3 is provided.

A paper feed cassette 4 storing a bundle of paper is removably disposed at the lower part of one side of the main body 1, and a paper ejection tray 5 is provided at the lower part of the other side.

On the other hand, a photoreceptor drum 6 serving as an image carrier is rotatably disposed in the center of the interior of the main body 1.
A convergent light transmitting body 7 is located above, and a charging device 8 is located on the front side of the convergent light transmitting body 7 in the rotational direction of the photosensitive drum 6. A developing device 9, a transfer pole 10, and a cleaning device 11 are arranged in this order on the front side.

An exposure lamp 12 for irradiating light onto the original glass table 2 is provided on the side of the convergent light transmitting body 7, and an exposure lamp 12 is provided above the convergent light transmitting body 7 and from the exposure lamp 12. A support roller 13 supporting the lower surface of the original glass table 2 is disposed at a position that does not obstruct the optical path leading to the convergent light transmitter 7.

A half-moon roller 14 is provided above the paper feed cassette 4 located in the lower part of the main body 1, and a paper feed cassette 4 is provided in front of the paper feed cassette 4 in the paper transport area.
An actuator 16 of a detection member 15 is provided to detect when the paper is ejected from the paper, and a pair of upper and lower paper refeed rollers 17a, 17 is provided in the transport area in front of the detection member 15 in the transport direction of the paper.
A locking member 18 that locks with the leading edge of the paper to stop conveyance of the paper is located in front of the paper refeed rollers 17a and 17b.

The lower surface of the conveyance path in front of the paper refeed rollers 17a and 17b in the paper conveyance direction is connected to a toner collection box 19 located below the developing device 9, the photosensitive drum 6, and the cleaning device 1. The transfer pole 10 is formed on the upper surface and is located within the recess 20 of the toner collection box 19 .

A toner collection box 19 located below the developing device 9, the photosensitive drum 6, and the cleaning device 11 collects collected toner that falls from a drop opening located on the back side of the cleaning device 11 in FIG. The receiver has a collection port.

A fixing device 21 is provided adjacent to the toner collection box 19 on the opposite side of the paper feed cassette 4.

Note that 22 is a separation claw provided at the lower part of the cleaning device 11 and located in the conveyance path, 23 is a drive source, and 24 is an attachment for lifting the middle plate inside the paper feed cassette 4. A force member 25 is a hopper located in the second part of the developing device 9.

The electrophotographic copying apparatus configured as described above can raise the front side upward using the lower edge of the rear side as a fulcrum, and in the raised state, the toner collection box 19 can be moved to the bottom of the rear side. By pushing down the front side using the edge as a fulcrum, the lower portions of the developing device, photosensitive drum, and cleaning device 11 can be opened.

When operating the apparatus configured as described above, first place the original on the upper surface of the original glass table 2, cover it with the platen cover 3, perform operations on the operation panel, and then perform the copying operation. When the image of the original is irradiated by the exposure lamp 12, the original glass table 2 starts to move back and forth in the horizontal direction with the original covered by the platen cover 3 placed on its upper surface. The original image irradiated at step 12 reaches the upper surface of the photoreceptor drum 6 via the convergent light transmitter 7, while the photoreceptor drum 6 is charged by the charging device 8 before reaching the lower part of the convergent light transmitter 7. As a result, an electrostatic latent image corresponding to the original image is formed on the surface of the photoreceptor drum 6.

Thereafter, as the photoreceptor drum 6 rotates, it is developed into a toner image by a developing device 9, while the uppermost sheet of paper in the paper feed cassette 4 is sent out sequentially by a half-moon roller 14 and is driven by an actuator 16 of a detection member 15. Then, it passes through a pair of upper and lower paper refeed rollers 17a and 17b, and is stopped by a locking member 18 located in the conveyance path, and is temporarily on standby.

Thereafter, the paper is fed again at a predetermined timing, and the toner image on the surface of the photosensitive drum 6 is transferred to the recess 2 of the toner collection box 19.
After being positioned on the upper surface of the paper by the action of the transfer pole 10 located within 0, the paper on which the toner image has been transferred is separated from the photosensitive drum 6 by a separation claw 22 and conveyed to the fixing device 21.

The fixing device 21 fixes the paper using pressure and heat, and the paper is discharged onto the upper surface of the paper discharge tray 5.

On the other hand, after the paper has been separated, the photosensitive drum 6 is cleaned by the cleaning device 11 in preparation for the next copying, and the toner scraped off during cleaning by the cleaning device 11 is collected from the drop opening of the cleaning device 11. It falls into the collection box 19 and is stored there.

FIG. 2 shows a schematic diagram of the document table driving device used in the electrophotographic copying apparatus constructed as described above.

The document table 31 of this document table drive device has a document glass table 2 on which a document is placed connected to one end thereof, and a rack 37 is integrally formed on the lower surface side of the other end. 37 meshingly engages with a pinion 30 rotated by a drive source (not shown). When the pinion 30 is rotated by a drive source (not shown), this rotational force is transmitted to the document table 31, and the document table 31 is moved toward the front or back in FIG. 2.

In this case, a guide member 51 is provided between the document table 31 and the main body of the recording apparatus, as in the conventional case. is fixed.

For this reason, when the pinion 30 is rotated by the drive source, the rack 37 meshingly engages with the pinion 30.
moves, and the document table 31 and document glass table 2 that are integrated with it move, but there is a support piece 3 between them and the main body of the recording device.
5 and a guide member 51 are provided between it and the main body.
Pinion 3 is positioned vertically and horizontally.
0, the rack 37 is maintained in an optimal meshing state.

Incidentally, even if the document table 31 connected to the document glass table 2 and the rack 37 that meshes with the pinion 30 are integrally formed of resin as described above, the mesh between the pinion 30 and the rack 37 is The engagement state can be maintained in an optimal state,
Also, in terms of durability, various resins can be selected and used as appropriate.

〔Effect of the invention〕

By configuring this invention as described above, the number of constituent members can be reduced and it can be easily assembled.
Therefore, it has excellent effects such as being able to provide a document table driving device at a low cost.

[Brief explanation of drawings]

Figures 1 and 2 show embodiments of this invention.
2 is a schematic diagram of the entire electrophotographic copying apparatus, FIG. 2 is a schematic diagram of a document table drive device, and FIG. 3 is a schematic diagram showing a conventional document table drive device. ■・・・・・・Main unit 2.48・・・Original glass stand 3・・・Platen cover 4・・・Paper feeding power Cent 5・・・Exit tray 6... Photosensitive drum 7... Convergence light transmission body 8... Charging device 9... Development device 10... Transfer pole 11 ...Cleaning device 12 ...Exposure lamp 13 ...Support roller 14 ...Half-moon roller 15 ...Detection member 16 ...・Actuators 17a, 17b... Paper refeed roller 18...
... Locking member 19 ... Toner collection box 20 ... Concavity 21 ... Fixing device 22 ... Separation claw 23 ... Drive source 24...Biasing member 25...Bosopa 30.40...Pinion 31.44...Document table 32.47...Rail 33 .34.45.46... Bearing 35.
49...Support piece 36.50...Guide member 37.41...Rack 42...Clip 43...Support member 45. 46...Steel ball 51...Guide member procedure amendment document Published September 16, 1986

Claims (1)

[Claims] What is claimed is: 1. A document table drive device for a recording apparatus, characterized in that a rack is integrally formed on the lower surface of the document table and engages with a pinion of a drive source.