JPH0447725Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a transfer conveyance device that makes it possible to reduce the size and weight of a copying device.

[Background of the idea]

In general, a copying device develops a latent image formed on a photoreceptor drum into a toner image, transfers the toner image onto transfer paper that is fed at a certain timing from a paper feeder, and then fixes it and exits the device. It is now being discharged. This transfer section is provided with a discharge wire facing the photoreceptor drum, and the toner image on the photoreceptor drum is transferred by the electric discharge of the wire to the transfer paper that is conveyed in close contact with the transfer paper. It is important that the material is conveyed correctly in close contact with the body drum surface. For this purpose, transport guide plates are provided before and after the back plate of the discharge wire, and the front transport guide plate (on the upstream side in the paper feeding direction) is made oblique toward the photoreceptor drum, and the rear transport guide is used to transfer images immediately after transfer. A transfer conveyance unit was installed, which included a transfer guide plate that received the paper at a position close to the photoreceptor drum. In order to easily handle jamming of the transfer paper during the conveyance process, this transfer paper conveyance unit needs to be able to be separated from the photoreceptor drum integrally. However, in the past, the transfer paper conveying unit was separated by being pulled out in the axial direction of the photoreceptor drum or by lifting the photoreceptor drum side, which caused the problem that the mechanism became extremely complicated.

[Purpose of invention]

This invention is intended to solve the above-mentioned problems, and aims to provide a transfer and conveyance device with a simple structure that allows the transfer and conveyance unit to be easily and integrally separated from the photoreceptor drum.

[Structure of the idea]

In order to achieve the above object, this invention provides a support means to raise the main body of the copying apparatus obliquely from the front side to the back side, and is configured so that the transfer conveyance unit can be locked so that it can be dropped using the back side as a fulcrum. It is.

〔Example〕

Next, this invention will be explained based on embodiments shown in the accompanying drawings.

FIG. 1 shows a sectional view of a copying machine to which the present invention is applied. In the figure, reference numeral 1 denotes a copying machine main body, and the copying machine main body 1 has a photoreceptor drum 2 at its center, and a charging section 3, an exposure lens section 4, a developing section 5, a transfer section 6, and a cleaning section 7 are arranged around it. It also includes a paper feed section 8, a fixing section 9, and a paper discharge section 10.

The paper feed section 8 includes a paper feed roller 16 that feeds out the transfer paper 15 that has been pushed up by lifting the paper receiving plate 14 in the cassette 11 by a push-up lever 13 disposed at the bottom of the cassette mounting section 12, and the paper feed roller 16. A second paper feed roller 17 is provided to sandwich the transfer paper 15 sent from the printer and feed the transfer paper 15 to the transfer section 6 at the appropriate timing.

As shown in the figure, the paper feed roller 16 has a half-moon shape by cutting out a part of its circumference, and when not feeding paper, the circular part is positioned upward, and is pushed up by the downwardly extending notch and the lever 13. A passage 18 for the manual paper 15' can be formed between the paper 15 and the transfer paper 15. Reference numeral 19 denotes a leading edge regulating shutter for manually fed paper, and the leading edge regulating shutter 19 is operated when the paper feeding roller 16 starts rotating as shown by the arrow due to the action of a half-moon shaped cam 20 that faces in the opposite direction to the paper feeding roller 16. The manual paper 15' or the transfer paper 15 in the cassette can be fed to the second paper feed roller 17.

The transfer section 6 is provided with a discharge wire 21 facing the photoreceptor drum 2, and by the discharge of the discharge wire 21, the toner image on the photoreceptor drum 2 is transferred to a transfer paper that is being conveyed in close contact therewith. In order to ensure that the transfer paper is conveyed correctly while adhering to the surface of the photoreceptor drum, a transfer conveyance unit 24 equipped with a conveyance guide plate 23 for the transfer paper is provided before and after the back plate 22 of the discharge wire 21. It is being The transfer conveyance unit 24 includes a container 25 for storing toner scraped off the photosensitive drum 2 by the cleaning section 7. Reference numeral 26 denotes a toner storage opening provided at a position away from the transfer paper transport path of the transport guide plate 23, and the toner storage opening 26
communicates with a discharge port 7a provided at the bottom of the housing of the cleaning section 7.

The copying apparatus main body 1 is provided on its lower surface with support means 27 for keeping the main body in an inclined state from the front side to the back side, as shown by the two-dot chain line in FIG.
The support means 27 is formed of a filament having a thickness that can withstand the weight of the aircraft body, and is housed on the underside of the main body 1 during normal times. Therefore, the transfer conveyance unit 2
4, when the main body 1 of the copying apparatus is raised obliquely by the supporting means 27, it can be dropped by holding the handle 24' with its rear side as a fulcrum P, as shown by the solid line in the figure. The locking and releasing means 28 of the transfer conveyance unit 24 is
As shown in Fig. 4. The locking means 28 shown in this figure is a spiral spring 33 fitted to pins 31 and 32 that are horizontally protruded into punched holes 29' and 30' formed in the main frame frames 29 and 30 that are installed upright at the front and rear of the transfer conveyance unit 24, respectively. The shoulder portion 34a of the inverted trapezoidal block 34 provided on both sides (front and rear in the paper feeding direction) of the transfer conveyance unit 24 and the bottom portion 34 are connected by both end portions 33a and 33b of
It is configured to accommodate b. That is, when the transfer conveyance unit 24 in the locked state as shown in FIG. 3A is pushed downward, the bottom part 3 of the block 34
The lower end 33b of the spiral spring 33 that supported the
deforms against its elasticity and is released as shown in Figure B. This spiral spring 33 is loose with respect to the pins 31 and 32, and is always provided with a weak spring force by an auxiliary spring 35. In the released state as shown in the fourth figure, the upper end 33a of the spiral spring 33 is almost horizontal, and the lower end 33b is The position is maintained so as to be retracted to the outside of the passage area of the block 34. Therefore, when the transfer conveyance unit 24 in the released state shown in FIG. Push against each other. When the transfer conveyance unit 24 is lifted up even more forcefully, the upper end 33a of the spiral spring 33 deforms and presses against the shoulder 34a of the block 34, and the lower end 33b slides into the bottom 34b of the block 34, causing the transfer conveyance unit to be lifted up. 24 will be locked. The above operation can be performed by simply holding the handle portion 24' of the transfer conveyance unit 24 and moving it up and down, and the operation is extremely simple.

Reference numeral 36 indicates a transfer guide plate that receives the transfer paper immediately after transfer at a position close to the photosensitive drum 2; 37 indicates a flap portion provided at the center of the conveyance guide plate on the upstream side of the back frame 22; the flap portion 37 is normally is kept on the same surface as other parts by a light spring 33, but when a thick postcard or the like is fed as transfer paper, it can sink downward against the spring 38.

[Effect of idea]

As explained above, this invention is characterized by providing support means for tilting the main body of the copying apparatus from the front side to the back side, and locking the transfer conveyance unit so that it can fall using the back side as a fulcrum. The paper conveyance unit can be easily and integrally separated from the photoreceptor drum. Therefore, there is no need for a conventional complicated mechanism such as pulling out the transfer paper conveying unit in the axial direction of the photoreceptor drum or lifting the photoreceptor drum side.

Further, when a spiral spring is used as the locking means, various excellent effects such as locking and releasing operations can be performed more easily and reliably are achieved.

[Brief explanation of the drawing]

The figures show an embodiment of this invention, in which Fig. 1 is a sectional view of the main body of the copying machine, Fig. 2 is a side view showing the fallen state of the transfer conveyance unit with the main body of the copying machine tilted, and Figs. B is a sectional view showing the action of the locking means, and FIG. 4 is an enlarged perspective view of the locking means. 1...Copying device main body, 6...Transfer section, 21...
Discharge wire, 22... Back plate, 23...
...Conveyance guide plate, 24...Transfer conveyance unit, 2
7... Supporting means, 28... Locking means, 33...
Spiral springs, 33a, 33b...both ends of the spiral spring, 34...inverted trapezoidal block, 34a...shoulder, 34b...bottom.

Claims (1)

[Claims for Utility Model Registration] (1) A supporting means is provided to raise the main body of the copying apparatus obliquely from the front side to the rear side, and the transfer conveyance unit is locked so that it can be dropped using the rear side as a fulcrum. Transfer paper conveyance device. (2) Utility model registration claim 1, wherein the locking means is a spiral spring with both ends protruding so as to hold the shoulder and bottom of an inverted trapezoidal block provided in the transfer conveyance unit. The transfer conveyance device described in Section 1.