JPS60247268A - Electrostatic recording device - Google Patents

Abstract

PURPOSE:To balance the life of a photosensitive body with a toner feed amt. by detachably fixing a photosensitive body and a developing device with a common holder to the main body of a recording device, and fixing a toner-contg. vessel freely attachably detachably to the developing device. CONSTITUTION:The photosensitive drum 4, the developing device 14, and a cleaning device 49 are fixed to a common chassis 58 to form one body, and mounded on the main body of the copying machine, and the toner hopper 18 as the toner container is fixed freely attachably and detachably to the upper part of the developing device 14. This hopper 18 can be attached or released upward through the opening 59 of the upper side of the main body in a state of the developing device 14 fixed to the main body. As a result, when the life of the photosensitive body is longer, the running coat can be markedly cut down by exchanging only toner hopper 18 without releasing the drum 4 and the devices 14, 49.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electrostatic recording device to which a developing device is detachably attached.

(b) Prior art Conventionally, a cartridge-shaped toner hopper was used.
As described in Japanese Unexamined Patent Publication No. 58-152263, toner is supplied to electrostatic recording devices by placing a toner hopper into a toner supply port provided in the main body. This is a replenishment method from the I side, and a feeding mechanism is required to send the toner to the back of the developing device.

In addition, for those in which the developing unit is detachable from the main body, the opening of the cylindrical cassette is sealed with a sheet-shaped sealing member, and the seal is opened and the cassette is inserted when supplying. There are also methods. In the case of this method, the disadvantages are when opening the seal member,
When inserting it into the developing unit, there is a risk of 1-ner scattering.
Careful work is required. In addition, it is necessary to insert and remove the cassette opening, which was originally located upward, and turn it half a turn to align the toner opening with the supply port of the developing device, making the work cumbersome.

In addition, some photoconductors and toner hoppers are integrally formed, but if the photoconductor has a long lifespan, even if the photoconductor is in a usable condition, the toner may be dispensed. The photoreceptor was discarded along with the toner dropper, resulting in inefficiency.

Purpose of the Invention The present invention has been made in view of the drawbacks of the prior art described above, and it is possible to shorten the life of the photoreceptor and the supply of 1-ners, and to eliminate the need for a tossor feeding mechanism. The purpose of this invention is to realize an electrostatic recording device that has a strawberry structure and can prevent scattering of particles.

(d) Structure of the Invention The present invention provides an electrostatic recording device in which an electrostatic latent image formed on a photoreceptor is developed with toner by a developing device, and this toner image is transferred to recording paper, in which the photoreceptor and the developing device are connected to each other. This electrostatic recording device is characterized in that it is removably attached to the recording device main body by a common holding member, and that a container containing toner is detachably attached to the developing device.

(E) Embodiment FIG. 1 is a sectional view showing an electronic copying machine as an embodiment of the present invention. (1) is the copying machine main body; this copying machine main body (
1) A document table (2) made of a transparent glass plate is attached to the upper surface of the document plate (2) so as to be slidable in the left and right directions. (3) is a cover attached to the upper surface of the document table (2) so as to be openable and closable;
During the copying operation, the original is placed between the document table (2) and the cover (3).
) and scan in the left and right direction. A photoreceptor drum (4) whose peripheral surface is coated with a polyvinyl carbazole photoreceptor is rotatably mounted on the copying body (1). On the top of the photosensitive drum (4), a short focus lens array (5 ) are vertically arranged.The short focus lens row (5)
An exposure lamp (halogen lamp) (6) for illuminating the document surface is provided on the right side of the
5) and the exposure lamp (6) are fixedly installed in the same chassis (7). (8) is a reflector of the exposure lamp (6). Further, on the upstream side of the short focus lens row (5), a site erase run is provided for removing (site erase) the electric charge on the portion of the photoreceptor drum (4) corresponding to the side edge of the copy paper (9). 3-pu (10) is provided. To erase the site in this way, use the separating claw (11) in this area as described later.
This is to peel the copy paper (9) from the photoreceptor drum (4) by contacting the photoreceptor drum (4). This site toilet - slump (10>
A charging corotron (12) for uniformly positively charging (approximately 600 V) the photoreceptor (4) is fixedly installed on the upstream side of the photoreceptor (4).

On the downstream side of the short focus lens row (5), there is a developer for developing the electrostatic latent image formed by the charging corotron (12) and the short focus lens row (5) with toner (13). The developing device (14) is equipped with a developer (15) consisting of a mixture of toner and carrier.
A magnet roller (16) for conveying the toner toward the surface of the photoreceptor drum (4) and a screw (17) for mixing the toner and carrier are rotatably built in. (18) is a toner hopper as a toner storage container detachably attached to the upper part of the developing device (14);
A sponge roller (19) is provided below the toner hopper (18) to supply the toner (13) contained therein little by little to the developing device (14). In addition, this Toner Hora”
A cylindrical shutter (56) is provided at the inner bottom of the toner hopper (18) to prevent the toner (13) from leaking during transportation of the toner hopper (18). is attached to the developing device (14) so that the shutter (56) is pushed by the sponge roller (19) and automatically opens. (57) is configured to open the toner hopper (18) for developing. Equipment (1
4) is a spring that is fixed to (20) is a counter that operates every time the toner hopper (18) is replaced, and counts the number of times the toner is replaced. Thus, for example, the count value of this counter (20) is r5. If this occurs, a message indicating that the photosensitive drum (4) should be replaced is displayed on the copying machine main body (1). In addition, when the count value of the counter (20) reaches a certain value, in the above example, "If the count value reaches 5.
Mechanism for preventing the sixth replacement of the toner hopper (18) (
(not shown) is provided. At the downstream edge of the developing device (14), there is a magnet (14) that catches the leaked carrier.
21) is permanently installed.

FIG. 2 is a perspective view showing the developing device (14) and the like.

In this figure, (58) is a chassis as a holding member that is removably attached to the copying machine main body (1), and in addition to the developing device (14), the photosensitive drum (4) and the cleaning device to be described later. (49) is installed.

Further, FIG. 3 is a perspective view showing a state in which the toner hopper (18) is about to be installed. In this figure, (59
＞ is an opening provided on the top surface of the copying machine main body (1), and the toner hopper (18) is attached to the developing device (14) through this opening (59). (60) is a cover that seals the opening (59).

<22> is a manual paper feed tray installed inside the copying machine body (1). On the downstream side of this paper feed tray (22), there is a start switch (23) which also serves as a jam sensor. ) is provided.

(24) is a paper feed cassette that is detachably attached to the inner bottom of the copying machine main body (1). This paper cassette (
24> is mounted from the right side to the left side of the copying machine main body (1). A support plate (25> on which the copy paper C9) is placed is swingably installed at the inner bottom of the paper feed cassette (24). teeth,
The base end is provided with an opening (24a) through which the free end of a push-up lever (26) can be inserted, the push-up lever (26) being swingably attached to the inner bottom of the copying machine main body (1). Shihe-(2
6) is equipped with a j·-swing spring (27) that urges it to rotate in a clockwise direction, and the support plate (25>) is pushed upward and urged upward by this torsion spring (27). Further, a paper feed roller (28) for feeding copy paper (9) one sheet at a time is provided near the downstream end of the paper feed cassette (24), and the paper feed roller (28) presses the uppermost copy paper (9) with its own weight.Therefore, the copy paper (9) is pushed by the weight of the paper feed loaf (28) and the torsion spring attached to the push-up lever (26). (
27). (29) is copy paper (
This is a corner separator that separates 9) one by one.

On the downstream side of the paper feed cassette (24), the paper feed roller (
A guide (30) is provided for making an upward U-turn on the copy paper <9) fed at step 28). This guide (30) is integrally molded with the paper feed table (22) and is configured to be able to rotate counterclockwise about a support shaft (31) inserted through the lower end thereof as a fulcrum.

A paper feed cassette (24) is located downstream of the guide (30).
A pair of register rollers ( 32) (33)
is provided. This register roller pair (32) (3
3>, the lower roller (33) is not connected to the drive source, and this lower roller (33) is continuously rotating. The lower roller (33) and paper feed roller (28) are connected via pulleys (34), (35) and a belt (36). Note that the paper feed roller (28) and pulley (3
5) It is assumed that a clutch is disposed between the two.

The upper roller (32) of the register roller pair (32) (33) is connected to a lever (38) fixed to a holding shaft (37) rotatably provided on the copying machine main body (1).
) is rotatably attached to one end of the The lever (
38) The other end is bent into an L shape, and the paper feed cassette (24
> or copy paper 8 fed from the paper feed table (22)
- The downstream edge of (9) is formed so as to be able to be stopped. Note that the lever (38) has balanced left and right moments around the holding shaft (37), and the copy paper (9)
Until the arrival of the register roller pair (32) (
33) cannot be pressure-welded. Therefore, even if the lower roller (33) is continuously rotating, the upper roller (32) is not urged to rotate, and the copy paper (9) is rotated by this pair of register rollers (32) (
33), it will not be possible to supply the amount of water that has arrived during the period 33). However, if the downstream edge of the copy paper (9) fed manually or by the paper feed roller (28) fl is stopped by the L-shaped portion of the lever (38), this lever (38) is given a counterclockwise moment about the holding shaft (37), and the pair of register rollers (32, 33) knee t-copy paper (9) is held between them, and the feeding force is increased. However, in this state, it is not yet possible to apply enough feeding force to allow the copy paper (9) to pass under the lever (38>). ■ in (3B), it continues to stop while in contact with the character-shaped part, but when the timing with the operation of the document table (2) is taken, the plunger (not shown) attached to the lever (38) ), a further counterclockwise moment is applied to this lever (38). Then, the copy paper (9) is sufficiently clamped by the pair of register rollers (32) (3g), and sufficient feeding force is applied to pass through the L-shaped portion of the lever (38), and the copy paper (9) is ) is fed toward the photoreceptor drum (4).

The developing device (
A transfer corotron (39) is provided for transferring the toner image developed in step 14> onto copy paper (9). Also,
On the downstream side of the transfer corotron (39), the separating claw (11) for separating the copy paper (9) from the photosensitive drum (4) is disposed adjacently. This separation claw (11)
is rotatably attached to the spindle (42) of the upper roller (40) of the pair of conveyor rollers (40, 41), and is directed toward the surface of the photoreceptor drum (4) with a spring (see Fig. (not shown).

On the downstream side of the conveyance roller (40) (at), there is a heat roller (43) into which a halogen lamp of about 800 W is inserted, and a pressure roller (44) that is pressed against the heat roller (43). A fixing device (45) is provided. The heat roller (43)
An oil supply vibrator (46) for supplying silicone oil to the heat roller (43) is lightly pressed onto the upper part of the heat roller (43). Fine open cells are formed on the tube wall of this oil supply vibrator (46), and the inside is filled with silicone oil. Therefore, this oil supply vibe (4
The silicone oil in 6) permeates the tube wall of this vibrator (46) and is gradually supplied onto the heat roller (43). Further, a torsion spring (47) is provided on the left side of the pressure roller (44) to press the roller (44) in a counterclockwise direction, that is, in the direction of the heat roller (43).

The copy paper (9) on which the toner image has been fixed by the fixing device (45) is discharged onto the 111 paper tray (48) provided at the top of the paper feed cassette (24). It turns out. The paper discharge tray (48) is configured to be able to come out and go in and out of the copying machine body (1), and is inserted into the copying machine body (1) when not needed.

The rotation of the photosensitive drum (4) of the separating claw (11) 1
A cleaning device (49) for removing toner that has not been completely transferred to the copy paper (9) and remains on the photoreceptor drum (4) is provided on the downstream side (upper side in the figure) along the 1- direction. This cleaning device (49) includes a rubber blade (50) for scraping off residual toner on the photoreceptor drum (4), and a rubber blade (50) for discharging the toner scraped off by this blade (50). Screw-con hair for (51
) is built-in. In addition, the blade (50) is rotated in a counterclockwise direction, that is, the leading edge is attached to the photoreceptor drum (4).
A spring (not shown) is provided for biasing in the direction of .

Downstream side (upper side in the figure) of the cleaning device (49)
is equipped with an eraser lamp (52) for removing all residual charges on the photoreceptor drum (4). (53) is a filter of this eraser lamp (52).

Also, the right side of the copying machine main body (1), that is, the paper output tray (4)
8) and the paper feed cassette (24) are installed, there is a handle (54) for lifting the copying machine main body (1).
) is permanently installed.

Furthermore, the handle (54) of the copying machine main body (1) is fixedly mounted 1.
2- A prismatic rubber cushion (55) is fixed on the side (left side) opposite to the side where the copying machine is lifted. It serves to protect the copying machine main body (1) when it is placed on the ground or the like in an upright position.

After placing the original on the original platen (2), when the copy start switch (not shown) is turned on,
The document table (2) once moves forward to the left and then back to the right. During this backward movement, the document image is transferred to the photoreceptor drum (4).
), and an electrostatic latent image corresponding to the original image is formed on the photoreceptor drum (4). This electrostatic latent image is developed with toner in the developing device (14), and this toner image is transferred to the copy paper (9) fed from the paper feed cassette (24) using a corotron (39) for transfer. Transcribed by.

The copy paper (9) on which the toner image has been transferred in this manner is peeled off from the photosensitive drum (4) by the separating claw (11), and is fixed by heating and pressure in the fixing device (45). Then, the fixed copy paper (9) is placed in the paper output tray (48).
) is placed on top.

Note that residual charges and toner that has not been completely transferred to the copy paper (9) and remains on the photosensitive drum <4> is removed by the cleaning device (49) and the eraser lamp (52).

(F) Effects of the Invention In the present invention, the photoreceptor and the developing device are removably attached to the recording device body using a common holding member, and the container containing toner is detachably attached to the developing device. Therefore, if the life of the photoreceptor is long, only the toner storage container needs to be replaced. Therefore, running costs can be significantly reduced.

Note that if the toner storage container is configured so that it can be detachably attached to the developing device from above while the developing device is attached to the recording apparatus main body, a toner feeding mechanism is not required and the structure is simple. This is easy and can prevent toner from scattering.

[Brief explanation of drawings]

Each of the drawings shows an embodiment of the present invention.
The figure is a sectional view showing the internal structure of the electronic copying machine, FIG. 2 is a perspective view of the main parts, and FIG. 3 is an external perspective view. (1)・Copier main body (electrostatic recording device main body), (4)・・
... Photoreceptor drum, <14) ... Developing device, (18
) ・Toner hopper (toner storage container), (58)・
...Chassis (holding member). Applicant: Sanyo Electric Co., Ltd. Agent: Patent Attorney: Shizuo Sano

Claims (1)

[Scope of Claims] 1. In an electrostatic recording device in which an electrostatic latent image completely formed on a photoconductor is subjected to toner development by a developing device, and this toner image is transferred to recording paper, the photoconductor and the developing device are common. An electrostatic recording device, characterized in that it is detachably attached to a recording device main body by a holding member, and a container containing toner is detachably attached to the developing device. 2. The electrostatic recording device according to claim 1, wherein the container containing the toner is configured to be detachable from the developing device when the developing device is fully attached to the main body of the recording device. Device.