JPS60114869A - Image forming device - Google Patents

Abstract

PURPOSE:To facilitate processing of jam, maintenance, etc. by rendering a conveyance unit releasable from the conveyance position through interlocking with movement of a door. CONSTITUTION:The shaft 37 of an arm 32 is moved from the point of the long hole 38a of an arm stand 38 toward 38b, and a shaft 34 is moved from one end side 31b of the long hole of the arm stand 31 toward the other end side 31c by manual operation for closing a front door 30, and a joint lever 33 idly fitted to a shaft 34 is also moved in the same direction as the arm 32. A lever 24 located below a conveyance unit 11 in the inside of the main body of an apparatus begins to be turned around a shaft 25 by these movements, but the unit 11 is automatically pushed up to the standard position 50 or 51 of the side plate of the main body by installing a tensile spring 27, and the front door 30 is held in a normal state capable of forming an image by engaging the door catch 45 of the side plate of the main body with the door catch 46 of the door 30. The door 30 is turned open, and operations reverse to said operations are carried out to enable jam processing and maintenance. As a result, in releasing the conveyance unit from the conveyance position through interlocking with the opening of the door, jam processing, etc., are made very easy and safe by providing the door 30 with the elastic means for swinging the conveyance unit and the elastic means for balancing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an I1m image forming apparatus in which a transport unit and the like move toward and away from an image carrier in conjunction with opening and closing of an opening/closing door of a main body.

Conventionally, this coffin's Il! II image forming apparatus, among others:
In a copying machine, a copy sheet is transported from a cassette or other storage unit until it is ejected from the copying machine after being fixed, by a paper feed roller, a conveyance guide member usually consisting of a pair of plates, a conveyance roller, It is made to run while being restrained by a fixing roller or the like.

On the other hand, as is well known, the characteristics of the sheet itself are constantly changing due to changes in the environmental temperature, so it is not always possible to reliably transport the copy sheet over its entire travel under any circumstances. It is not easy to jam (paper jam 11)
)) It was possible to completely prevent this from occurring.Moreover, this jam did not simply make mosquito photography impossible, but was caused by manipulating each FLR in the device. This method has disadvantages such as wasting the time required for complicated photocopying such as removing paper. Therefore, it is extremely important to configure a copying apparatus so that when a jam occurs, a means for detecting the jam occurs and a means for easily and quickly removing the jammed paper.

Conventionally, for this reason, the sheet conveying part near the transfer area where the toner image on the photoreceptor is transferred to the copying sheet, which is the most difficult part to remove the jammed sheet, was integrated with an L% transfer charger. Containing unit L1 The whole unit can be freely swung.L1 A swing mechanism and an operating handle are provided at the bottom of the unit, and the handle can be manually operated. Even when a jam occurred L7'h, a space was created to remove the jammed paper and the paper was removed.

It was a difficult task for the L or L1 operator.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a new image forming apparatus that is improved in view of these drawbacks.

Another object of the present invention is, first, to greatly reduce the amount of jam removal operations that should not be necessary and the time required for such operations.

In addition, the photoconductive layer of the photoreceptor, which is the image carrier, has a weak strength, so great care must be taken not to damage it during maintenance, and there is a risk that the photoconductive layer may deteriorate due to exposure to light. There is.

Therefore, the first and second thing is to prevent the photoreceptor from being damaged during jam removal or maintenance, or from being exposed to light. II The image forming means is integrated into a unit, and a photoreceptor protection cover is provided, and when the opening door of the apparatus main body is opened for maintenance, the transfer conveyance unit is automatically swung to remove the unit from the photoreceptor. This is to ensure sufficient space for the photoreceptor protection cover to enter to protect the transfer section.

As mentioned above, by automating manual operations during jam removal and maintenance, it is possible to shorten operation time and greatly improve operability, and it is also possible to protect the photoconductor.The basic purpose is to Accordingly, it is possible to provide an image forming apparatus that is almost maintenance-free.

First, an embodiment of a copying machine to which the present invention can be applied will be described in detail with reference to the drawings.

Fig. 1 is a cross-sectional view 7b showing the side surface of a copying machine to which the present invention is applied, with a side lid provided on the copying machine body that can be opened freely tilted down towards the front of the paper, and a part cut away. be. Inside the copying machine main body 100, there is a cylindrical photoreceptor 2 having a central axis extending perpendicular to the plane of the paper, and a photoreceptor L f disposed near the periphery thereof.
c The developer 3, the cleaner 4 and the charger 5 are connected to the frame 1.
These members are integrally attached to a and constitute the unit 1 as a whole. And unit)l
are placed on the support guide parts Sa and Sb, which are made of support members SK and Sb, which are fixed in the copying machine main body, and are opened after opening the opening door (not shown) arranged on the front side of the copying machine main body. ,
It can be pulled out towards the front of the page.

Below the unit 1 including the photoreceptor, there are arranged a transfer arm 8a, a separation roller 8b, etc., which are mounted on the right end of the unit 11 in the figure and will be described below. A lens system LE fixed to the support member S is disposed above the photoreceptor 2, and a transparent lens system LE is mounted on the top surface of the photoconductor 2 and moves back and forth from side to side as shown in the figure. Glass plate G has been removed.

To briefly describe the copying process, the document table t1t including the glass plate G on which the document M is placed moves to one side, and at this time, when a light source rays jK1 onto the document surface, the reflected light from the document surface is reflected by the lens system LE. After that, an electrostatic latent image is formed by forming an image on the surface of the photoreceptor which has been uniformly charged by the charger 5,
Then, the latent image is placed on a photoreceptor that rotates in the direction of arrow A, reaches the position of the developing device 3, and forms a toner image.

On the other hand, the transfer materials in the cassette c engaged with the main body of the copying machine are sequentially fed into the machine by paper feed rollers 6 starting from the top, and are aligned with the toner image on the surface of the photoreceptor by the registration roller rough. The toner image is transferred to the transfer material when it reaches the transfer site where the Wm device 8a is located, and the transfer material carrying the toner image is further separated from the photoreceptor by the separation means of the separation loaf sb, and then transferred to the fixing device 10 via the conveyance path 9. It is fixed and fixed by the machine and then ejected from the machine.

On the other hand, after the transfer is completed, the developer that did not contribute to the U m L s transfer is further removed from the photoreceptor by the cleaner 14, and then the photoreceptor again enters the same copying process as before.

Next, a conventional example of the present invention will be explained.

A copy sheet conveyance path 9 is provided below the unit 1 including the photoreceptor 2.
, and upstream thereof there is a transfer conveyance unit 11 which has a separation roller 8b and further a transfer charger 8a and is rotatable about a support shaft 12.

Below the transfer unit 11, there is a shaft support plate 13, which is similar to the bottom of the main body of the copying machine, and a lever 15, which is rotatable about a shaft 14 supported by this, is attached to the lower part of the transfer and conveyance unit 11. It holds a roller 16 that presses a temporary spring 17 attached to the roller.

For this reason, the lever 15 is normally in a position where image formation (1) is possible as shown in the figure, but it can be rotated counterclockwise by manual operation using an operation handle (not shown). The transfer/conveyance unit 11 located at the lower part of the photoconductor 2 is lowered to secure a space with the photoreceptor 2, thereby making it possible to perform jam removal and maintenance.

In such a copying apparatus, the second embodiment of the present invention will be described next.
The configuration will be explained with reference to the perspective view shown in the figure.

The photoconductor 2 is polished by a copying device located at a lower position. The bottom plate 20 of the main body is machined into a concave shape in the dead space with the rubber feet 21, and a plywood 22 for unitizing the mechanical parts is provided on the bottom surface. A support fitting 23 is attached to this, and a lever 24 is swingably suspended thereon by a foot shaft 25.The lever 24 includes the above-mentioned copy sheet conveyance path 9, separation roller 8b, A roller 26 that rotates the conveying unit 11 to which the transfer charger 8a is attached about the axis 12 of the support plate 13 and side plate 52 (see Fig. 3) attached to the paper board of the main body of the apparatus is attached to the axis 28. It is rotatably attached to.

The lever 24 has the weight of the transfer/transport unit 11 and a biasing force capable of constantly pressing the unit 11 to a predetermined position t near the photoreceptor 2 (portions 50 and 51 shown in FIG. 3). The tension spring 27 is tensioned. Therefore, when the lever 24 is given a rotation release action, it is rotated clockwise about the shaft 25, and under normal conditions, the upper surface of the conveyance unit 11 is moved to the main body of the copying machine, as shown in FIG. It can come into contact with the reference positions t50 and t51 of the side plates and become a position where image formation is possible.

At the bottom of the main body of the copying machine and on the side of the front door 30, there is an arm support stand 31 of the same type equipped with a pivot hinge 30a for the front door 30, and on this support stand 31, an arm 32 swings about a shaft 36. It is attached freely.

The arm support base 31 is formed with an elongated arc 31b centered at the 36th position of the axis, and its displacement range is the same as that of the arm 3.
2 is in front as shown in Figure 2! ! The position where 30 yen is opened simultaneously and the position is regulated, and the door catch 45 and front door side door catch where the front door 30 is closed and attached to the side plate 53 of the device body as shown in Figure 3. 46 is the angle until the two reach a specified position where they engage.

Further, the arm 32 has a shaft 34 of the same type, and a part of this shaft (on the back side of the figure) is connected to the elongated hole part 3 of the arm support base 31.
It penetrates 1b and fits loosely, and from the penetrating plane there is a long rI
A larger flat washer (not shown) than J and Ei restrict the axial direction of the misstop ring.

Roughly in front of the shaft 34, a joint lever 33 rotatable via a shaft 35 is fitted loosely into the lever 24 that raises and lowers the aforementioned transport unit 11.
The axial direction is regulated and installed using a larger diameter flat washer and an E-shaped stop ring.

The shaft 34, which is the same type as the arm 32 described above, connects the elongated hole 31b of the arm support base 31 with the arm support base S.
The reason why the axial direction is controlled by a flat washer and an E-shaped stop ring (not shown) on the back side of the conveyor unit 11 is that the joint rack 33 is connected to the conveyor unit 11 via the lever 24.
The traction force of the tension spring 27 that pushes up the shaft 54
And in order to strongly pull the arm 32 in the direction shown (Figure 2),
A moment is generated around the fulcrum 36 of the arm 32 in the direction of tilting the arm 32 in the direction C in the figure, but this is intended to suppress this force.

A shaft 37 is fixedly fixed to the other end of the arm 32, and this shaft passes through an elongated hole 38a of an arm stand 38 fixed to the front door 30 and is loosely fitted therein. It is something that exists,
Furthermore, a flat washer with a larger diameter than the width of the elongated hole (not shown) is fixed with a screw from the rear side of the figure while maintaining an appropriate gap in the axial direction that allows the elongated hole to slide.

This screw can be easily installed and removed, for example, by removing the screw and manually lifting the arm 32 in the direction of the front plate 53 of the device main body (see Figure 3). The unit is automatically transported by the traction force of the two tension springs)
11 is raised and its position is regulated at a predetermined position.

Next, to explain the operation procedure, in Figure wJ2, the front door 30 is attached to the hinge of the arm support stand 31, 1J31a.
At the end of the movement of the arm 32, which is rotated around , is fixed to the front door 30, and is loosely fitted into the elongated hole 38a of the arm stand 38 with a shaft 37 and a screw (not shown). When manually operated to move the elongated hole 38aill from the open end point in the direction of arrow C to close it, the arm 32 described above
The shaft 3 moves from the point 38a of the arm stand 38 toward the other end of the elongated hole 38b. At the same time, the arm 32 is also centered around the axis 36 of the arm support 31, and the axis 34, which is also covered by the arm 32, is centered on the axis 36 of the arm support 31.
1 from one long end side 31b to the other end side 3, lc hair arm 3
Move while regulating the position in the C direction of 2.

Further, along with the above movement, the joint lever 33 loosely fitted to the shaft 34 having an area φ of the arm 32 also moves in the same direction as the arm 32.

As a result of this movement, the lever 24 at the bottom of the carpet feeding unit (11) inside the main body of the apparatus begins to rotate clockwise about the shaft 25. A tension spring 2γ is tensioned in this direction of rotation, and automatically pushes up the aforementioned transport unit 11 to the reference position 5o or 51 of the side plate of the apparatus main body. At this point, the opening σJTh30ti The door catch 45 attached to the side plate of the main body of the apparatus meshes with the door catch 46 attached to the front Qso itself to maintain a normal state in which image formation is possible.

In order to return the front door 30- to the open position, the door 11h is opened and the door 11h is opened, and through the above-mentioned reverse operation, the state becomes ready for jam removal and maintenance.

Also, since the transport unit ll't- can be moved in and out of the photoreceptor 2, 1jiJ d 30 is released by 1;1'', and rmBt
When the tM feed z=y ) 11 is separated from the photoconductor 2, the photoconductor holding cover 18 (
It is possible to protect the transfer area of the photoreceptor 2 by moving the conveyance unit in the direction of F in the space obtained by the movement of the conveyance unit.
In the case of the copying apparatus of this embodiment, the transport unit 1 is pulled out toward the front in the figure when collecting developer, so that
In these cases, it is possible to automatically protect the front door from damage caused by outside light or handling.

As explained above, according to the configuration of the present invention, the conveyance unit is interlocked with the commercial closing door in a well-balanced manner so that it can approach and separate from the image forming section, so that handling of jams, etc. becomes very easy and safe.

Furthermore, opening the protective cover, etc. Since it can be linked with four doors, it is also possible to prevent damage and deterioration of the photoreceptor, etc.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of a copying apparatus according to the present invention, Fig. 2 is a perspective view showing the transport unit in an open state, and Fig. 3 is a cutaway view showing the stratification with the door open. It is. In the figure, ll is a transport unit, 24 is a lever, and 30
is the front door, 32 is the arm, 33 is the 1 intre/<-13
8 is an arm stand, and 39 is a tension spring.

Claims (2)

[Claims] (1) In an image forming apparatus in which a transport unit that transports sheets is opened in a direction away from a transport position, the transport unit is moved away from the transport position in conjunction with the movement of an opening/closing door that opens and closes the transport unit. Featured image forming device. (2) The image forming apparatus according to claim 1, wherein the transport unit has a transfer means.