JPS60257464A - Developing device - Google Patents

Abstract

PURPOSE:To perform the magnetic angle adjustment of a magnet body merely to eliminate a developer by providing the magnet body with a developer separating part where the force attracting the developer is weak and positioning the developer separating part in plural positions between a developer reservoir of a casing and an aperture part. CONSTITUTION:A magnet roll 3 consists of a rotating sleeve 31 rotated by a driving shaft 35 and a magnet body 32 which is provided in the rotating sleeve 31 and has a fixed shaft 36 fixed to a side plate 23 of a casing 2 by a magnetic angle adjusting mechanism 4. In the magnet body 32, plural magnets 33 are arranged to have a part 34 of a wide interval in one position. When the developer is discharged, a magnetic angle adjusting plate 42 is positioned to the position where its projecting part 423 is brought into contact with the second projecting part 412 of a magnetic angle adjusting substrate 41. Since the fixed shaft 36 and a fixed pin 37 are engaged with a groove 425 of a projecting part 424 of the magnetic angle adjusting plate 42, the magnet body 32 is turned and positioned together with the projecting part 424 of the magnetic angle adjusting plate 42 as one body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a developing device for developing using a developer containing a carrier and toner in a recording device such as an electrophotographic copying machine.

[Prior art]

Conventionally, in a developing device such as an electrophotographic copying machine that uses a developer containing carrier and toner, if the carrier becomes dusty or deteriorates, the toner conveyance performance of the carrier will not be fast enough and the development will be defective. Become. Therefore, it is necessary to replace the carrier periodically. In the conventional developing device as shown in FIG. 10.11, when replacing the carrier, since the plurality of magnets 33 of the magnet body 32 in the magnetic roller 3 are arranged at approximately equal intervals, they stick to the magnetic roller 3. It was difficult to take out the developer. That is, when taking out the developer containing carrier from the developing device 7, remove the upper lid 21 of the casing 2 and stand it up with the drive unit side facing up, and then rotate the drive unit to ensure that it does not adhere to the magnet roller 3. The developer was being discharged.

On the other hand, the developer stuck to the magnet roller 3 is removed by removing it with a scraping member. As described above, the conventional developing device has a problem in that the work required to replace the developer containing carrier is complicated.

[Object of the present invention]

The purpose of the present invention is to solve the above-mentioned conventional problems.
To provide a developing device in which developer can be removed simply by adjusting the angle of separation of the magnet of a magnet roller, without removing the top cover of the developing device or removing it with a scraping member. It is about providing.

[Configuration of the present invention]

In order to achieve the above object, the present invention provides a developer separation part such as a part where the magnetic field is weak or a part where magnetic flux is increased by arranging magnets of the same polarity in the magnet body of the magnet roller, Moreover, the structure is characterized in that the part is supported so as to be able to freely adjust the angle of separation so as to face the opening of the casing.

That is, the configuration of the present invention includes a magnetic roller including a rotating sleeve that conveys a developer containing carrier and toner, a plurality of magnet bodies provided inside the rotating sleeve, and an opening. and a casing that accommodates a magnetic roller so as to face the opening, and the developing device transports the developer to the space by rotating the rotating sleeve, wherein the magnetic body rotates the developer. The developer has a developer detachment portion that generates a magnetic field that acts to cause the developer to detach from the surface of the sleeve, and the developer detachment portion can be positioned at a plurality of locations between the developer reservoir and the opening of the casing. This is a single-image device characterized by being provided so that the angle of elongation can be adjusted.

When the developing device is in operation, the magnet body is positioned and fixed so that the above-mentioned, image-side detached portion of the magnet body extends into the image-side reservoir. Therefore, the developing action is carried out smoothly as in the conventional method. On the other hand, when removing the developer from the developing device, the magnet roller is positioned and fixed so that the developer removal part of the magnet body faces the opening of the casing, which is the equalizing part, after facing downward. be done. Thereafter, when the rotating sleeve is rotated, the developer attached to the rotating sleeve reaches the image side of the magnet body. Since the developer detachment portion has a weak ability to adsorb the developer, the developer attached to the rotating sleeve falls off from the rotating sleeve due to its own weight and is expelled to the outside.

As described above, the magnet body has a developer detachment portion where the force for attracting developer is weak, and can be positioned at multiple locations 1111 between the developer reservoir and the opening of the casing. Because of this, during normal operation, the separation angle is il [tq] so that the developer separation part is located in the developer reservoir of the casing, and this does not cause any trouble to the developing operation. 4 drugs discharged! :1, the L1 developing device is arranged so that the Macnet roller and the opening face downward, and the elongation angle of the magnet is adjusted so that the image-side separated part of the magnet faces the opening. Thereafter, the developer can be removed by a simple operation of rotating the rotating sleeve l+ii.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 9A.

FIG. 1 is an overall perspective view of an embodiment of the present invention, and FIG. 2 is a sectional view of the mounting portion of the magnet roller in FIG. 1.

Figure 3 is a partial view of the mounting part of the magnet roller in Figure 2;
Fig. 4 is an enlarged side view of Fig. 2 of the magnet roller picking up part during operational operation, and Fig. 5 is an enlarged side view of Fig. 2 of the magnet roller mounting part during developer discharge. , Fig. 6 is a sectional view taken along the X and -X lines in Fig. 4, and Fig. 7
The figure is Y-Y #i! in Figure 4. 8 is a sectional view showing the position of the magnet roller during normal operation, FIG. 9A is a sectional view showing the position of the magnet roller during developer discharge, and FIG. 10 is a schematic diagram of a conventional developing device. FIG. 11 is a sectional view of the mounting portion of the conventional magnetic roller.

JK image device, which has a casing 2 as shown in FIG.
．． Magnet roller 3. As in the conventional one shown in FIG. Stirring roller 6, spike control plate 7. It consists of a toner cleaner 8 and the like, and is provided facing the photoreceptor 9 so as to form an image section.

The casing 2 has an opening 25 and is used to house the magnetic cola bowl 3 facing the opening 25, and has an upper lid 21. Bottom plate 22, l1ill plate 23. It consists of a back plate 24, etc.

The magnet) o-ra 3 is provided with a rotating sleeve 31 rotated by a driving shaft (5) and within the rotating sleeve 31, and is fixed to the side plate 23 of the casing 2 by an angle adjustment mechanism 4. Magnet body 3 having a fixed shaft 36
It consists of 2. The magnet body 32 has a plurality of 11 magnets 33 arranged at a distance of 1° with one widely spaced portion 34.

The elongation adjustment mechanism 4 adjusts the elongation of the magnet body 32, and includes an elongation adjustment base plate 41 fixed to the side plate 23 of the casing 2 with screws 413, and the elongation adjustment base 4.
1, and a fine angle adjustment plate 42 rotationally positioned on top of the fine angle adjustment plate 42.

The angle adjustment board 41 has first and second positioning abutments 4
11, 412. The fine angle adjusting plate 42 consists of a flange portion 42 and a protruding portion 7124. The flange portion 421 is provided with an arcuate groove 422 and a protrusion 423. The arcuate groove 422 is engaged with a screw 414 provided on the angle of departure adjustment board 41, and the protrusion 423 is engaged with a screw 414 provided on the angle of departure adjustment board 41.
The fine angle adjustment plate 42 is positioned on the elongation adjustment board 41 by coming into contact with the positioning abutment portions 411 and 412.

The protrusion 424 is a storage groove 4 that accommodates the fixed shaft 36 of the magnet body 32 and the fixed bottle 37 that is engaged with the fixed shaft 36.
25, and has a long shape in the longitudinal direction of the fixed bin 37.

During normal operation, the fine angle adjustment plate 42 is positioned at a position where its protrusion 423 contacts the first abutment part 1 of the angle adjustment board 41, as shown in FIG. 414. As shown in FIG.
is located on the side of the peep 1 image agent reservoir 26. Accordingly, by the rotation of the rotary sleeve 31, the developer is conveyed to the opening 25 of the casing, which is the developing section, as in the conventional case.

When discharging the developer, the fine angle adjustment plate 42 has its protrusion 423 aligned with the angle adjustment board 41, as shown in FIG.
It is positioned at a position where it abuts on the second abutting portion 412 of the. The magnet body 32 has a fixed shaft 36 and a fixed bottle 37.
is engaged with the groove 425 of the protrusion 424 of the angle of separation n1^1 adjustment plate 42, and is rotationally positioned integrally with the protrusion 424 of the fine angle adjustment plate 42.

That is, when the protrusion 424 of the fine angle adjustment plate 42 is rotated and positioned from the position shown in FIG. 4 to the position shown in FIG. 5, the magnet body 32 is moved from the position shown in FIG.
It is rotated to the position shown in Figure A. In the position shown in FIG. 9A, the magnet body 32 has the widely spaced portion 34 between the plurality of magnets 33 positioned in the opening 25 of the casing 2. Therefore, when discharging the developer,
After the developing device 1 is set so that the magnet roller 3 and the opening 25 of the casing 2 face downward, the fine angle adjusting plate 42
When the protruding portion 424 of the magnet roller 3 is rotated to the position shown in FIG. It reaches the part 25, that is, the part 34 with wide spacing between the plurality of magnets 33, and falls off and is removed.

In addition, regardless of whether the number of magnets 33 provided in the magnet body 32 is an odd number or an even number, if a part with a weak magnetic field can be provided by providing a part with a wide interval between the magnets 33, It goes without saying that the magnet body produces the same effect as that of the previous embodiment.

Further, FIG. 9B is a sectional view of another embodiment, in which the magnet body 3 has a portion 34' in which magnets of the same polarity as the S pole are arranged in parallel.
2 is shown. Since the part 34' in which 32 magnets of the same polarity are arranged side by side has a weak ability to attract the developer with a magnetic flux, it has the same effect as a magnet having a part with wide spacing between the magnets. It is something that occurs.

Furthermore, when installing the elongation angle adjustment board 41 with the screws 413, the hole is made large enough to allow the screws to fit loosely, so that the angle or position can be finely adjusted when it is installed on the side plate 23 of the casing 2. can.

Furthermore, an auxiliary member can be provided that can be arranged so that the opening of the developing device faces downward when the developer is removed from the developing device. For example, when a developing device is disposed at the opening of a container that receives developer to be removed, a retractable member may be housed in a casing of the developing device.

[Effects of the present invention]

The magnetic body has a developer detachment portion which is a portion having a weak developer adsorption force, and the developer detachment portion is positioned at a plurality of locations between the developer reservoir and the opening of the casing. Therefore, when removing the developer, place the developing device so that the magnetic body and the opening face downward, and then the developer removing part of the magnetic body must be aligned with the opening of the casing. Adjust the elongation of the magnet so that it faces the area.

Thereafter, when the rotary sleeve is rotated, the developer in the developer reservoir is carried out by the rotary sleeve, falls off at the opening of the casing, that is, the developer detachment portion of the magnet, and is expelled from the casing. As described above, the angle of elongation of the magnet of the magnet roller is simply adjusted without the need to remove the top cover of the casing or remove the developer stuck to the rotating sleeve with a scraping member, as in the case of conventional systems. The developer can be removed with a simple operation.

In addition, during normal operation, the separation angle is adjusted so that the part of the magnet body that removes the developer is located in the developer reservoir of the casing, so there is no problem with the developing action, and it is the same as the conventional one. It can be done.

[Brief explanation of the drawing]

1 is an overall perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of the mounting portion of the magnet roller shown in FIG. 1, and FIG. 3 is a mounting portion of the magnet roller shown in FIG. 2. FIG. 4 is an enlarged side view of the mounting part of the magnet roller during normal operation, and a side view of FIG. 2 is an enlarged view of the mounting part of the magnet roller during developer discharge. FIG. 2 is a side view, and FIG. 6 is a sectional view taken along the line X--X in FIG. 4. FIG. 7 is a sectional view taken along the Y-X line in FIG. 4, and FIG.
FIG. 9A is a cross-sectional view showing the position of the magnet roller during normal operation, and FIG. 9A is a cross-sectional view showing the position of the magnet roller during developer discharge. FIG. 9B is a sectional view of another embodiment, FIG. 10 is a schematic diagram of a conventional developing device, and FIG. 11 is a sectional view of a conventional magnet roller mounting portion. 1: Developing device 2: Casing 3: Magnet roller 4: Elongation adjustment mechanism 21: Upper lid 23 of casing 2: Side plate 25 of casing 2: Opening 26 of casing 2: Developer reservoir 31 of casing 2: Rotating sleeve 32: Magnet body 33: Magnet 34: Part with wide spacing between magnets 34 Part where magnets of the same polarity are arranged side by side 36: Fixed shaft of magnet body 32: Fixed pin 41: Elongation adjustment board 4] 1: First positioning Abutment portion 412: Second positioning abutment portion 42: B1 angle adjustment plate 421: Flange portion 422: Arc groove 423: Projection portion 424: Projection portion 425: Storage groove. Patent applicant Konishiroku Photo Industry Co., Ltd. Figure 1 Figure 3 Figure 2 Figure 4 Figure 2. Fig. 7 t Fig. 8 Fig. 9A Fig. 10 q Fig. 11 Procedure oil stop, l: l'1'! rll (i Qzu18 monthλha1!!1
．． Director General of the License Agency Uga Michibu) 11゛n] Naka A'10 Table of Contents/1971; person, r+ If (-1'1 Shiya, Shinjuku-ku, Tokyo
1-26-2 Name (first name) (127) Konishi Roku Photo Industry Co., Ltd. 4th Representative Director 〒160 1!L
Story 356-6 (+90 Name (e+5ts) Patent Attorney Haru Yasushi θ 5”5 Date of amendment order I・j Voluntary '0 Amendment': Increasing number of inventions Sushi・Figure 4 corrected by attaching it F-ru.

Claims (2)

[Claims] (1) A magnetic roller consisting of a rotating sleeve that conveys developer containing carrier and toner, and a magnet body having a plurality of magnets provided in the rotating sleeve, and having an opening and facing the opening. In the developing device, the developing device includes a casing for housing a magnetic roller, and transports the developer to the opening by rotating the rotating sleeve, wherein the magnet body removes the developer from the surface of the rotating sleeve. It has a developer detachment portion that generates a magnetic field that acts to act as if it were a magnetic field, and is provided so that the separation angle can be adjusted so that the developer detachment portion can be positioned at a plurality of locations between the developer reservoir and the opening of the casing. A developing device characterized by: (2) Claim 1, in which the developer detachment portion is configured by widening the interval between adjacent magnets.
Developing device described in Section 1. (31m) The developing device according to claim 1, wherein the image side detached portion is constructed by making the magnetic poles of adjacent magnets the same.