JPS5926775A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To know the secure maintenance time of a long-life body to be detected by transmitting the rotation of an image carrier in an speed reduction state and detecting the rotation, and display-playing the state that the number of revolution attains a value corresponding to the maintenance time of the body to be detected. CONSTITUTION:The rotation of a photosensitive drum 1 are transmitted to the input shaft 13 of a switch operating mechanism 10 and the output shaft 15 makes a nearly one rotation when the drum 1 rotates specified times. Then, the eccentric projecting part 9a of an eccentric cam 9 fitted to the output shaft 15 through a unidirectional rotation clutch 16 presses the operating lever 11a of a detection switch 11, which is operated. Consequently, a display part 12 turns on to indicate that the cleaning time of the developer recovery box 7 of, for example, a cleaning device 2 comes, and following copying operation is stopped. Then, an operator draws out and cleans the developer recovery box 7. Thus, the maintenace time of the long-life body to be detected is known securely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a liquid crystal display device that can notify when it is time for maintenance, for example, when it is time to clean a developer collection box of a cleaning device.
Concerning improvement of electrophotographic equipment.

Conventionally, methods for knowing when it is time for maintenance in electrophotographic devices such as electronic e-machines have been based on optical detection, for example, to detect when the collection box for the current agent in a cleaning device is full, and detection. there were. However, in the case of optical use of the former, there may be malfunctions due to variations in the accumulation of collected developer and dirt on the light emitting part and the light receiving part.
The latter method, which relies on detection of heavy use, has drawbacks such as difficulty in adjustment and malfunction due to the light weight of the developer.

The present invention has been made based on the above circumstances, and an object of the present invention is to transmit the rotation of one image carrier rotating at the time of image formation in a decelerated state, detect this, and increase the number of image carriers. An electronic photograph that makes it possible to know when it is time for maintenance even for long-lived objects by displaying a message when the number of objects to be detected related to the human body reaches the time corresponding to the time for maintenance. The aim is to provide equipment.

The following is an illustration of the present invention! This will be explained based on a sequential example. FIG. 1 shows the configuration of a cleaning surface section of an electronic bonding machine, in which a photoconductor drum is placed on the side of a photoconductor drum 1 as an image carrier, that is, on the rotation direction side of an image transfer section (not shown). Untransferred developer a remaining on the surface of 1...
A cleaning device (cleaner) 2 is provided for removing.

This cleaning device 2 uses a cleaning blade 3 to scrape off untransferred developer a... from the surface of the photoreceptor drum 10, and uses a collection roll 4 to scrape off the scraped developer agent a... from the surface of the photoreceptor drum 1. lii+eye 111
The collected developer a' adsorbed on the surface of the collection roll 4 is further scraped off by a scraping blade 5. Further, the recovered developer a' .

Further, the developer recovery box 7 has a guide fdt portion 7a formed on the edge of the opening -ft1ll of the cleaning device 2.
It is mounted by engaging with a guide rail portion 6a formed at the edge of the lower end opening -11IlI of the casing, so that the developer collection box 7 can be pulled out to the front 1fal as necessary. Then, the collected developer a'... is periodically removed.

Furthermore, when the developer collection box 7 is full of the collected developer a' and it is safe to clean it, the maintenance time detection device 8 detects and displays that line.

As shown in FIG. 2, this maintenance time detection device 8 detects the continuous copying operation of an electronic copying machine using a developer collection box 7 as an object to be detected.
is performed the number of times that it becomes full, the tomoe-shaped eccentric cam 9 as an actuator moves to t'! Detecting means 12a consisting of a switch actuating mechanism 10 that rotates at regular intervals and a pull-out switch 1 operated by the eccentric cam 9 of this switch actuating mechanism 10; and a signal from this detecting means 12a, the developer is collected The display section 12b serves as a display means for indicating that it is time to clean the box 7.

The switch actuation groove 10 is located at 411 of the photosensitive drum I as a rotating part that rotates with the continuous copying operation of the electronic copying machine.
1a, the input shaft 13 is coupled to the input shaft 13, and the rotational force of the input shaft 13 is transmitted to the output @15 via the deceleration mechanism 14 as a deceleration means, and the one-way rotation clutch 16 is connected to the output shaft 15. The configuration is such that a single-core cam 9 as the actuator is attached via the actuator. Also, -
Hiki reduction @ structure 14 is a worm 17 integrated with the input shaft 13,
A gear box 1975 containing a worm output wheel 18 that meshes with the worm 17 and a group of output wheels (not shown) that decelerates and transmits the rotation of the worm tooth width 18 to the output shaft 15. ing.

The detection switch 1 and the eccentric cam 9 of the switch actuator 11 for operating the same are disposed near the bottom surface of the dust collection box 7, and The reset section (2nd θ 4)
The eccentric protrusion 9a of the eccentric cam 9 can be interposed in the first path. And the 31st;! As shown in 14, when the bow 1 is pulled out from the image agent collection box 7, the reset member 2 is removed.
0 hits the eccentric protrusion 9a of the eccentric cam 9, and rotates the eccentric cam 9 to the reset position in a circular motion. Summer! It's possible to get excited.

1. As shown in FIG. 4, the reset member 20 is a temporary spring bent into a substantially horizontal () shape, and when the developer collection box 7 is pulled out, the vertical piece at its tip does not deform elastically. 20 & follows the eccentric part 9a of the eccentric cam (:'i
nIt is actually designed to be pushed away. Further, in a state where the eccentric protrusion 9a of the eccentric cam 9 protrudes into the vk flow path of the reset member 20 due to some reason such as immediately after assembly, the development ^11
A reset member 2 is placed on the platform where the collection box 7 has arrived.
The structure is such that the 00 inclined portion 20F) is elastically deformed and rides the one-strand protrusion 9a, thereby avoiding low acid collision.

Note that 2I is formed on the bottom surface of the developer collection box 7]
, the vertical piece 20 when the reset member 20 is elastically deformed.
This is a relief groove for the tongue to avoid contact with a.

In addition, the display section I2 that indicates that the cleaning time has come is the "Cleaner Cleaning" fd distributed on the operation panel (not shown).
It consists of a colored display board 22 with characters such as
When iA23 is turned on, the words "Cleaner Cleaning" appear.

Next, the operation of the above embodiment will be explained. Untransferred developer a remaining on the surface of the upper body drum l during copying operation
... are collected in the casing 6 by the cleaning device 2, and the collected developer a'... is collected in the developer collection box 7. This I number increases in proportion to the number of copying operations.

On the other hand, the rotation of the photoreceptor drum 1, which rotates once per one copying operation, is transmitted to the input shaft 13 of the switch operating mechanism 10, and the photoreceptor drum 1 rotates a predetermined number of times, that is, the developer collection box 7 collects the image. When filled with agent a', the output shaft 15 rotates approximately once after rotating a predetermined number of times. Then, the eccentric protrusion 9a of the eccentric cam 9 as an actuator attached to this output @jHs via the one-way rotation clutch l6fc pushes the operating lever 11a of the detection switch 1 to operate the detection switch 11, and the cleaning device HH
,? When the 'I'7f sweeper of the developer collection box 7 lights up on the display 12 to indicate that the sweeper has arrived, the next copy can be made! Production stops.

When the display part 2 lights up, the operator must pull out the developer collection box 7 and clean it. The eccentric cam 9 is forcibly rotated to the reset position, and the detection switch 11 returns to the 1) OFF state.

Then, by cleaning and installing the developer recovery box 7, it becomes possible to make copies again.

In the above-mentioned practical example, a pigeon coop was described in which the detection of maintenance time was used for detecting the cleaning time of the developer collection box of the cleaning device W, but the present invention is not limited to this. Of course, the present invention may also be used to detect the time to replenish the developer, the lifespan of the photoreceptor drum, the lifespan of the heat roller, etc.

Further, although the configuration uses a gear box that accommodates a worm, a worm gear, and a gear group as the deceleration mechanism 14 of the switch actuation mechanism 10, the configuration is not limited to this, and for example, a configuration in which a number of Geneva mechanisms are combined may be used. In short, any method may be used as long as it can detect that the photosensitive drum has rotated a number of times corresponding to the maintenance time of the object to be detected.

In addition, non-invention is f, 1 within the scope of not changing the gist of the present invention.
Of course, various modifications are possible.

As explained above, according to the present invention, the [(]I1 of the rotating image carrier during image formation is transmitted and detected in a decelerated state, and the number of Since the display is displayed when the number reaches the appropriate number, you can definitely know when it is time to maintain the object, even if the object has a long life. Atsu-C, L is a light recovery J,, 17
This is useful for detecting whether a developer recovery box of a cleaning device containing developer is full or the like.

[Brief explanation of drawings]

The drawings show one example of the present invention. Figure 1 is a vertical cross-sectional view of an unboiled cleaning device section, and Figure 2 is an omitted diagram showing the configuration of the main part of the present invention. Nail') 3(
・〈1 is Hirata 1lV1 of the war section, Figure 4 is 1i11 of the main part
It is a front view. 1... Image carrier (photosensitive drum), ? ...Object to be detected (currently 1 dust scraping collection box), 8...Maintenance time detection c,
12a...Ide means, 12b...Display means (display section), 14...Deceleration means (deceleration effect). 1F Inasa Caucasian Agent Patent Attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] In a photographic apparatus that forms an image on a rotatably supported image carrier, a deceleration means is provided which is linked to the rotation of the image carrier and decelerates the rotation, and the image carrier is What is claimed is: 1. An electrophotographic apparatus comprising: a detecting means for detecting a maintenance time for a detected object related to the detection means; and a display means for displaying that the detected object is in need of maintenance in accordance with the detecting means.