JPS59167A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To improve the operability at the time of maintenance and the reliability of an electrophotographic device, by installing an engaging section which engages with a transporting device held by the 1st unit at the 2nd unit and by automatically returning the transporting device to the transporting condition when the engaging section is closed. CONSTITUTION:A toner image is formed on a photoreceptor in the upper mechanism 28a and transfer paper 30 is fixed by a fixing roll 37 in the lower mechanism 28b. When jamming is generated in transferring, the upper mechanism 28a is opened and jamming is removed by turning each lever in the direction of an arrow (x). Since projected parts 57, 58, and 60 press down each lever when the upper mechanism 28a is closed, a guide plate 42a is returned to the horizontal position, a roll 46 is contacted with a belt 43, and a fixing roll 34 is pressure- contacted with a roll 36, and, therefore, a transporting device 38 returns to a condition where the paper 30 is automatically transported. Therefore, even when the upper transporting element is not returned to the original position forgetfully, the element is not damaged because the upper and lower mechanisms contact with each other. Thus the operability at the time of maintenance, etc., and the reliability of the device are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in an electrophotographic apparatus in which a main body is separated into a first unit and a second unit, and the second unit can be opened for maintenance or the like.

[Technical background of the invention and its problems]

In electrophotographic apparatuses, a device as shown in FIG. 1 is used to remove paper jams during copying or to improve operability during maintenance.

This device includes a main body (II is a photoreceptor drum + II, which is an image bearing member), a charging device (1" IJ, g optical device (1, 1, The upper mechanism (] Oa) which is the second unit having the developing device (1), cleaning device (161, etc.), and the transfer device (high speed and heat fixing roller (211)
After that, it was published in U-To Paper H, CI! The f section mechanism (1
0b) and are separated by ft. When performing maintenance, etc., rotate the upper mechanism (H) a) in the direction of arrow S.
Perform maintenance by opening the upper part of the il. In addition, if a paper jam occurs in the conveyance device (c), transfer paper (two conveyance paths (2)
3a) the upper guide plate, which is the upper conveying element of the upper part;
Alternatively, the upper conveying roller (20) and further the upper fixing roller (5) are rotated as shown by solid lines in FIG. 1 to remove paper jams.

However, in this device, after maintenance of the conveyance device or paper jam removal is completed, it is forgotten to return the upper conveyance elements such as the upper guide plate to the conveyable state shown by the dotted line in Figure 1, and the upper mechanism (10a ) is often closed in the direction opposite to the arrow S direction. As a result, each device housed in the E section mechanism (+Oa) comes into contact with the upper conveyance element above the conveyance path (23a) in the upper mechanism (1011), and one of them is damaged and must be replaced. This is causing a problem.

[Purpose of the invention]

This invention was made based on the above circumstances, and when a paper jam occurs, the conveyance path is opened and the paper jam is easily removed, while the second one is used after the paper jam is removed or maintenance is completed. When the unit is closed, the conveying device can be easily and reliably returned to the conveying state, and each device of the second unit and the conveying device are in contact with each other as in the conventional case.
: An object of the present invention is to provide an electrophotographic device that can improve operability and reliability without causing P loss.

[Summary of the invention]

This invention provides the second unit with an engaging part for the conveying device held in the first unit, and automatically returns the conveying device to the conveying state when the second unit is closed, so that it can be easily used during maintenance, etc. There is a method that aims to improve the operability of the device and the reliability of the device.

[Embodiments of the invention]

Please refer to FIGS. 2 and 3 for an embodiment of this invention.
I will explain. The main body (2) is an image carrier C (not shown).
It is separated into an upper mechanism (2sa) which is a second unit having a certain photoreceptor drum, an image forming device, etc., and an upper mechanism (2B)+) which is a 7-unit unit.

At -4 of the upper mechanism (28b), there is provided a paper feed cassette C3] which houses the transfer paper and supplies the photosensitive drum (not shown) with the VC transfer paper. , and the other end is provided with a paper ejecting device (3) for receiving the transfer sheet (to) on which the copied image has been completed. Also, a paper feeding cassette)
The distance from the OD to the paper ejection device [, Ctl K] is the transfer device CL column that comes into contact with the photosensitive drum (r in the figure) through the transfer paper (to) during copying, and the upper side that houses the heater (34a). A pair of heating fixing rollers 07 consisting of a fixing roller (3 rollers and a measuring roller (7) with two rollers that are pressed against it during cleaning)
) is provided with a conveyance device C1l that conveys the transfer paper through the transfer device W (
3 (and the heat fixing roller 207), the first guide plate (41), the first conveyance roller (4I), the second guide plate (4 sides), and the conveyance belt (41). 1
¥1 upper conveyance r1-ra (JPY 1, 42 Lihi-related conveyance roller (
4[a] and a third conveyance roller (47). Furthermore, the conveyance path (38a) of these conveyance devices (to)
), the upper guide plate (42a) of the second guide plate 116, the +82 upper sub-transport roller (4e), and the upper fixing roller C(4),
When it is formed into a shape that can be rotated in the L direction, Ic,
There are 41 levers 611 at the center of rotation of these h, etc.
The second lever 6a and the third lever ←e are connected 11
ing. Also, on the side wall of the upper mechanism C28a), there is a first lever ci, 42 (1) L/haF (4, and h<).
(', 3 +7) I/bar +, [9 to 'f, -7t
, f is the engaging part that comes into contact with 7y +7)'・1st
A protrusion C, a second protrusion Oil, and a third protrusion (Lif) are formed. Note that G is a paper feed roller.Next, the operation will be described. As shown in Figure 2-1, the conveyance device during copying is placed in a state where it can convey the transfer paper (311), and when copying starts, the upper part (sensed in the groove tank (28a)) also moves to the body drum. (r shown in the figure) 1 image forming device (1
While a toner image is formed by '(destruction j'), a transfer paper (g) is conveyed within the upper mechanism (28b), and after the toner image is transferred from the photoreceptor drum by the third transfer device, The transfer paper (total) is fixed by a heat fixing roller 07) to complete a copy image, and is discharged to a paper discharge device O.

However, if a paper jam occurs during copying, the operator should rotate the negative section mechanism (28a) in the direction of arrow W as shown in Figure 4, and then rotate the released descendant lever in the direction of arrow ['I]X. The upper guide plate (42a), the second upper njtl transport roller t4G, or the upper fixing roller (
34) in the same direction to remove the paper jam.

You may return this descendant lever by hand, but even if you do not return it, if you close the upper mechanism (28a) in the direction opposite to the arrow W direction, the first protrusion K and Part 6'O1 second protrusion e old and third protrusion 1i are L-hi part guide plate (42, I) and second upper IH
11 conveyance roller (4fLh) comes into contact with each lever of the measuring roller C141 and presses down each lever upon closing.Therefore, the upper guide plate (42a) is returned to the horizontal position, and the second
The upper conveyance roller Oe is in rolling contact with the conveyance belt (43,
The upper fixing roller 0 is pressed against the measurement fixing roller 2,
The conveying device Q is automatically returned to a state in which it can convey the transfer paper (A).

This 1. With the tlIC configuration, even if you forget to return each upper conveyance element after paper jam removal or maintenance, etc., each upper conveyance element will automatically be returned to the conveyable state when the upper mechanism (28a) is closed. Like trap, upper mechanism (
28a) Accidents in which the devices in the closing mechanism (28a) come into contact with the upper conveying element and are damaged are prevented.

This invention is not limited to the above embodiments and can be modified in various ways.
For example, there is a large f, as shown in Fig. 4, the first unit is the 7t. (),
;@3t/) l//(-FIK northward biasing device, 4th spring, 5th spring; 2nd unit, 6th spring) At the same time as the upper mechanism (28a) is opened, each of the two transport elements is automatically rotated upward, and the upper mechanism (28a) is rotated upward.
With the closure of each protrusion e'i7), Q, l.

- the upper conveying element will not return automatically. Therefore, there is no need to open and close the upper conveyance element separately from the upper mechanism (28a) during maintenance, etc., and operability is further improved.

Furthermore, there is an optional mechanism for automatically opening and closing one part of the transport element by opening and closing the second unit.
A recess (60) into which the tip of each I/bar such as the first lever 6 can be inserted is formed at the tip of the protrusion formed on the side wall of the upper mechanism (283) as shown in Fig. 5 ( b) Push up the tip of the bar as shown in K, recess 0'=e 'F bottom (2+/
Rotate the upper conveying element upward, and when the upper mechanism (28a) is closed, push up the tip of the lever at the top of the four parts (6 (9) and return the upper conveying element as shown in FIG. 5(A).
Also good.

〔Effect of the invention〕

As explained above, according to the present invention, when removing paper jams or performing maintenance, by opening the second unit and the transport device, the transport path can be opened and paper jams can be removed. After the removal etc., the 21st
By simply closing the unit, the conveying device is automatically returned to the conveying state by the engaging portion of the second unit, so the operator does not have to return the conveying device to its original state before closing the second unit. It is possible to improve the operability of 't. With EK, when the second unit is closed, the conveyance device is reliably returned to its original state, so when the second unit is closed, the conveyance device and the conveyance device in the second-j-knit are not connected to each other when the second unit is closed. The reliability Pt is also improved because there is no chance of a splash caused by a part of the device coming into contact and damaging one of C1. If configured as in the first modified example or the second modified example71, the operator can automatically open and close the conveying path of the conveying device by simply opening and closing the second unit. You can improve your sexual performance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional device, Figs. 2 and 3 show an embodiment f911 of the present invention, and Fig. 2 is a sectional view showing the closed upper mechanism of t. Fig. 3 is a cross-sectional view showing the two-part mechanism and the two-part conveying element opened/concave I river, Fig. 4 is a cross-sectional view showing the upper mechanism of a modified example of the IGL of the present invention, and Fig. 5 The figure is a side view C showing a protrusion of a modification of α2 according to the present invention. 28a upper mechanism, 28b upper mechanism, 30 transfer paper, 31 paper feed cassette, 32 paper discharge device, 3:+transfer device, :34 H measurement, n roller, 37 heat fixing 1-ra, 38 conveyance device, 42a upper guide plate,
4G-i': l(2+7) upper 11111 conveyance roller,
53 first lever, 54 second lever, 56/third lever, 57 first projection, 58 second projection, 6
0 third protrusion, 64 - protrusion, 66 recess. Agent Patent Attorney Mr. Inoue Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A device that forms an image on an image carrier and transfers the formed image to a sheet of paper is used to direct the sheet paper toward the image carrier.
a supply section that supplies the image 4, and a supply section that supplies the image 4
A pair of rollers grips and conveys the sheet after the image formed on the first supporter is transferred, and a second unit holds the pair of rollers, and one end of the first unit is pivotally supported to the first unit. and a second unit whose curved end is openable and closable and holds the image carrier, and an engaging portion provided on the second unit that presses the pair of rollers together with a closing button of the second unit. ``SeiF photographic device'' characterized by the following features: