KR940008981B1 - Cabinet in an electrophotographic developer - Google Patents

Abstract

The cabinet of an electrophotographic developing device for easily removing paper in jam is formed integrally, with a covering plate for opening and closing an upper part of a fusing unit; a fusing unit having a paper ejecting roller; a fixing rack fixed to a lower cover to protect the upper part of the fusing unit; an upper cover body; a spring bracket being in contact with a double lock arm; a lock shaft; a lock rack; and a paper supplying unit.

Description

Cabinet of electrophotographic developer

1 is a schematic reference diagram of an electrophotographic developer according to the present invention.

Figure 2a is a structure of the main portion showing the upper cover locking portion used in more detail when opening and closing the upper cover in Figure 1, Figure b is a reference diagram when the upper cover is in the middle in Figure a, Figure c is a top cover in Figure a Note also in the fully released state.

3A is a reference diagram showing the fuser unit in more detail, and b is a reference diagram with the fuser cover deployed in FIG.

Figure 4a is an example showing the inclination angle variable means and expansion and contraction means in the tray unit according to the present invention, b is an example showing more specifically the degree a, c is a reference diagram of the operating state, such as variable inclination angle in the b degree .

* Explanation of symbols for main parts of the drawings

3: upper cover 3a: holder

3b: swivel 4: multi-cassette

5: paper feed unit 6: pickup roller

7: friction plate 9: lower body

19: spring hinge 20: slide opening and closing roll

21: spring bracket 22: lock shaft

23: double rock arm 24: folded hinge

25: cover 26: fuser unit

27: tray unit

The present invention relates to a cabinet of an electrophotographic developer, and in particular, protects the components such as the paper feeding unit, the optical system, the conveying unit, the developing system, the fixing unit, the discharge unit, and the like installed inside the electrophotographic developer, and facilitates the removal of paper during handling and jam occurrence. It relates to a cabinet structure of an electrophotographic developer.

Electrophotographic developing apparatuses are used for copying and printing various documents and the like, and such electrophotographic developing apparatuses are known in various types according to the method of copying.

Among them, the most widely used in the near term includes optically photosensitive processing of a paper feeder for inputting paper fed from a paper cassette to the main body, a feeder for transferring the fed paper to an optical system, and a paper to be copied. An optical system for developing, a developing system for processing the contents of the document with light emitted from the optical system, a fixing system for completely fixing the developed contents on the paper, and a discharge paper for discharging the fixed paper to the outside of the main body. It is known to include integrally.

In the conventional electrophotographic developing device, a so-called jam (JAM) phenomenon frequently occurs when the paper fed into the device is transported from the input to the output of the paper and is jammed in the device due to a malfunction of the device itself or a jam of the input paper.

In order to remove the jams generated in the paper conveying path, it is necessary to open the upper cover of the cabinet configured to check the protection and abnormality of the various devices installed in the main body. The locking state of the upper cover on the upper frame side was released with the locking release knob to open the inside of the electrophotographic developer to remove the jam.

After jam removal, the upper end of the raised upper cover is strongly pressed down to form a fastening to the lower body.

On the other hand, in the prior art, the discharge tray is installed so as to rotate in a range from a vertical position to a horizontal position with respect to one side of the main body of the device, it was formed to be variable in length in the longitudinal direction.

The paper feeding cassette used as a feeding means in the cavities of the conventional electrophotographic developing apparatus has a form that can be selectively utilized by receiving cassettes containing two or more different types of paper at the same time, but are combined in a horizontal state. It was difficult to avoid inconvenience and hassle according to the manual replacement when selecting different sized papers, and since it protruded from the machine to the side in the longitudinal direction, there was a disadvantageous problem of occupying a lot of the occupying space of the machine. .

In addition, when a jam occurs in the device, relatively heavy internal devices are fixedly disposed on the upper cover, so that it is difficult to guarantee the ease of jam removal due to the separation sound of the heavy upper cover, and when the heavy upper cover is closed. The impact caused by self-weight affects the peripheral parts, and it is difficult to exclude the damage and wear of the parts, and the accuracy of the optical system and the developing system is lost, resulting in the deterioration of print quality.

As described above, in the conventional electrophotographic developing apparatus, the structure of the cabinet is not preferable because the above problems still remain.

An object of the present invention was created to improve the problems of the prior art as described above, which is particularly possible to compact the overall size of the device by improving the electrophotographic developer cabinet structure and the convenience of use more To provide an electrophotographic developing device that can be pursued.

In order to facilitate the use of the electrophotographic developing device as described above, the present invention is capable of selectively feeding the necessary paper in the state where the heterogeneous paper is loaded at the same time by the multi-cassette and the paper feeding means for mounting various papers in multiple. It is to provide a cabinet of a convenient electrophotographic developer.

The present invention is to provide a cabinet of the electrophotographic developer to remove such a jam phenomenon immediately and easily when a jam occurs during use of the electrophotographic developer.

According to the present invention, the paper feed cassette of the paper feeding means installed through the cabinet of the electrophotographic developer can simultaneously feed a predetermined sheet of paper according to an optional act while simultaneously accommodating cassettes according to a plurality of paper standards. Fuser unit with a multi-cassette feeder, a top cover which is provided on the upper cover side without a normal fixing device, and which is opened and closed by a double-lock device, and an independent retractable means to facilitate jam removal. It is characterized by the cabinet structure of the electrophotographic developer having a unit configuration.

Hereinafter, the present invention will be understood in more detail with reference to the accompanying drawings.

That is, Figure 1 schematically shows the overall configuration in the present invention.

Here, two multi-cassettes 4, each containing a different size of paper, are mounted in a paper feeding unit 5 containing these multi-cassettes 4, and the paper feeding side of the multi-cassette side of this paper feeding unit 5 is loaded. Each of these is in contact with a friction plate 7 having independent pickup rollers 6 and guides 8 for feeding paper from these cassettes.

In addition, the paper feeding unit 5 is fixed to the rotary table 3b of the upper cover 3, which can be opened and closed by a spring hinge 19 of the lower cover 9, the upper cover (3) Except for fixing devices by ordinary apparatuses such as an optical system, a developing system, and the heating roller 29, and the pressing roller 30, etc., the heating roller 29, the pressing roller 30, The fixing device by the discharge roller 31 or the like forms a fixing unit unit 26 including a cover plate 251 having independent opening and closing means.

The upper cover 3 including the paper feeding unit 5 and the ordinary optical system, the developing system, etc., is provided with a lock stand 24 provided on the upper side of the developing unit 14 of the developing system, and the lock stand 24 is provided. The slide opening and closing knob 20 used to open and close the upper cover 3 as shown in FIG. 2, and the slide opening and closing knob 20 are pushed in parallel straight lines together with the coil spring fixed to the upper cover 3. It is installed on the rotating rock (3b) of the double rock arm 23, which is returned or returned, and a spring bracket 21 and a tension spring 32 for limiting the movement distance of the double rock arm 23 are provided. The lock shaft 22 hanging on the lock hook portion is provided on the fixing stand 3a on the upper cover 3 side.

In addition, the fuser unit 26 is made up of the folding hinges 24: 241-244, the cover plate 251, the fixing unit guard 253 and the guide plate 254 of FIGS. The inside of the apparatus includes a pressing roller 30, a heating roller 29, and the like, and an apparatus medium dispensing unit where the printed paper is discharged by the fixing roller 29 and the pressing roller 30. The discharge roller 31 is fixedly installed in the fourth cover 254 folded by the fourth folding hinge 244 so as to have a separate folding means from the heating roller 29 and the like. One end of the 254 is provided with a first folding hinge 241 to which one end of the first cover 251 is coupled.

In addition, the conventional tray device installed on the discharge side of the device is provided with a variable angle adjustment means that can be set to the variable angle of inclination at any angle relative to the conventional tray coupling shaft 28, on the other hand a rectangular case It is provided with a telescopic folding means that can be reduced in size or extended by sliding sideways from side.

The telescopic folding means may have a configuration of folding folding rather than the sliding type, wherein the sliding folding means includes a first rectangular case having open sides and a rectangular through hole, and a rectangular through hole of the first rectangular case. A second rectangular case having an external size that can be fitted inside the second rectangular case having a rectangular opening of another size, and a third rectangular case having an external size smaller than the rectangular rectangular opening of the second rectangular case; … The plurality of first to N-th rectangular case may be a conventional form that can be stretched while the other is slidingly interconnected with one of the other rectangular case.

In addition, the variable angle adjustment means that can be varied around the shaft 28 is integrally, the bad spring having a circular arc of a resilient material as shown in Fig. 4 near the hole of the shaft 28 of the discharge portion, and the band spring Correspondingly connected to the curved surface to achieve the configuration provided with an arc-shaped bracket for proceeding the clock movement (CLICK).

Reference numerals 10, 11, 15, and 16 denote transfer rollers, register rollers, transfer machines, and separators, and 12, 13, 17, and 18 refer to photosensitive drums, chargers, vacuum cleaners, and depletion lamps. Are the scanning unit and the reflection mirror, respectively.

In this configuration, the present invention has the following effects and effects.

That is, the electrophotographic developing device according to the present invention has a paper feeding unit 5 in which the paper feeding portion can accommodate the multi-cassette 4 as shown in Fig. 1, and simultaneously feeds cassettes having paper of different sizes. ) Can be used. At this time, each of the sheet feeders on the side of the plurality of cassettes is cut into the independent pickup roller 6 and the friction plate 7 side, and the user can select paper by simply pressing a cassette selection button provided outside the case. .

This selective action can be achieved by the servo control circuit of the system.

In addition, when jam occurs in the pick-up roller 6 or the feed roller for feeding, when the slide opening / closing knob 20 on the upper cover 3 side is pushed as shown in FIG. 2A, the double-rock arm 23 on the double-lock device side is pressed. The slide opening and closing knob 20 is pushed in the horizontal direction, and the double rock arm 23 is circularly rotated in the right direction in the drawing along with the tension spring 32 built in one point axis.

When the circular rotation of the double rock arm 23 is advanced to the position until the lock shaft 22 of the upper cover 2 axis is released, the upper cover 3 is normally hinged with the lower cover 9. The upper cover (3) is open from the stator, the upper cover (3) is released from the fixed stand, and the paper feed unit (5) is automatically lifted with the opening of the turntable (3b) of the upper cover (3). It is possible to remove the paper loaded on the pick-up roller (6), feed rollers and the like.

In addition, when the upper cover 3 is closed, the lock shaft is in the state of being returned to its original position by the spring bracket 21 after the double lock arm 23 releases the lock shaft on the upper cover 3 side. (22) enters while closing the upper cover (3) while pressing the arc surface of the head close to the head of the lock arm 23 side on the side of the holder (3a), located below the head of the double rock arm (23) When the lock shaft 22 is locked by the double rock arm (23).

Therefore, the opening and closing action of the upper cover 3 can remove the jam phenomenon occurring in the front part of the device, and the system device detached from the upper cover 3 is a device such as a fixing unit unit 26. It can be operated in the removed state, the volume is lighter than the conventional one can be assured of the soundness of the work with the reduction of the load according to the opening and closing.

In addition, when the opening and closing symbols of the upper cover 3 side are reduced as described above, the gravity transmitted to the internal device or the like may be minimized, thereby improving the reliability of the device.

On the other hand, when a jam phenomenon occurs in the vicinity of the fixing unit of the machine, the heating roller 29 and the pressing roller 30, etc., which form the fixing unit as shown in FIG. 3A in the cover plate 251 of the fixing unit unit 26 as shown in FIG. This is exposed to the front open to the outside, and at the same time the guide plate 254 on the discharge roller 31 side is rotated to the ground side around the fourth folding hinge 244 to open the front exposure is also made in this part. Can be.

Therefore, the user can easily and easily remove the jam phenomenon in this area.

In addition, the inclination angle adjusting means having the band spring and the arc bracket on the discharge side of the device can be set to the action by the click movement at various inclination angles around the discharge surface can be used to select the appropriate inclination angle for the quantity of paper At the same time, it can be handled by flipping it at an angle of 90 degrees to prevent damage and damage to the tray unit.

In addition, since the tray unit 27 has elastic folding means that can be used to vary depending on the size of the paper, it is possible to adjust the size of the tray unit 27 using the elastic folding means according to the size of the paper discharged. .

Therefore, this causes the paper to fall from the tray to the ground, such as when the size of the paper from the machine is relatively larger than the tray size, causing damage to the printed area, or requiring the user to worry about the paper falling off. It can be excluded.

In addition, the overall system of the present invention as described above has different opening and closing means for each necessary part, which is advantageous for the maintenance and repair of the internal device of such a device, and it is compactly integrated so that the compact and lightweight design of such a device In addition, a good advantage can be obtained, and the excellence of the handling and management can be guaranteed.

Since the present invention provides a cabinet of an electrophotographic developer, it is not only easy and easy to remove the jam phenomenon generated in such a device, but also obtains various conveniences and advantages of using the unit of each part. There are beneficial features such as being there.

Claims (1)

An upper part having a paper cassette insertion unit and a paper discharge guide tray on an upper end of a lower cover 9 having a conventional printed circuit board mounted thereon and including an optical part, a developing part, a fixing part, a paper feeding part, a discharge part, and the like. The cover 3 is installed so that the hinges 243 and 244 connecting the upper cover 3 and the lower cover 9 are points, and the other side of the upper cover 3 is configured to be opened and closed by the lower cover 9. In the cabinet structure of the photodeveloper, the upper and lower sides of the fixing unit guard 253 of the fixing unit 26 provided in the paper conveying path of the lower cover 9 can be folded by the central hinge 242. The cover plate 251 for opening and closing the upper part of the fixing unit in the state and the guide plate 254 for opening and closing the front of the fixing unit in the state having the discharge roller 31 of the fixing unit are connected to the hinges 243 and 244, respectively. The upper fixing unit unit 26 and the lower cover 9 and fixed to the lower cover 9 An upper cover 3 formed of a fixing table 3a protecting the upper portion of the fixing unit 26, a rotating table 3b hinged to the lower cover 9 to open and close the developing unit, the optical unit, and the feeding unit; In the fixing table 3a of the cover body 3, a double rock arm 23 for controlling the swivel table 3b and a spring bracket 21 which is in contact with the double rock arm 23 to give elasticity are installed. 3) Lock lock shaft 22 is installed on the bottom of the swivel opening / closing end, and on the upper surface of the swivel 3b, the lock shaft 24 for resiliently installing the slide nose 20 for releasing the lock shaft 22 is provided. And the feeding unit 5 for guiding the multi-cassette 4 inserted at a predetermined distance from the slide knob 20 so as to be inclined contact with the feeding roller 6 and the friction plate 7 of the feeding unit. The cabinet of the electrophotographic developer, which is integrally formed on the inner bottom of 3b).

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