JPS6159375A - Attaching and detaching mechanism for developing device of electrostatic copying machine - Google Patents

Abstract

PURPOSE:To facilitate the attachment and detachment of a developing device by sliding the developing device to a rotary drum side by a spring while detaching member which is rotated up to a reference position is engaged with an engagement pin. CONSTITUTION:A support frame 5 mounted in the lower chamber of the copying machine body 1 so that it can be drawn out through a vertical front surface plate 18 is supported while a rotary drum 41, developing device 43, and cleaner are held at accurate positions. The rotary drum 41 is set on the support frame 5 and projecting flat plate parts of the developing device 43 are engaged with respective guide grooves and the developing device is moved toward the rotary drum 41; and the detaching member 509 is rotated upward around a shaft 513 while the engagement pin 421 is stood right on the recessed part 511 of the detaching member 509 to engage the engagement pin 421 with the recessed part 511, so that the detaching member 509 and developing device 43 are moved toward the rotary drum 41 by the spring 515.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a developing device attachment/detachment mechanism for an electrostatic copying machine.

<Seishu and prior art> Electrostatic copying machines typically have a rotating drum in the center of the copying machine body that rotates a predetermined number of times for each copying operation. , a charging chamber, an exposure section, a developing device, a transfer chamber, a peeling chamber, and a chrysalis are arranged in this order around this rotating drum. . and,
These components, the rotating drum, and the developing device each include consumables that have a certain lifespan, and therefore must be replaced one after another in order to maintain a certain copy quality.

In order to avoid such requirements, conventionally, ■ The main body of the copying machine was divided into -F2 parts, and the -
h is pivotably supported, the other is separated from the lower half, and each of the above component fortresses is removable with the copy paper conveyance path divided; There was a drawer that could be pulled out from the front.

Regarding the former, C pivots one of the upper halves of the copying machine main body, separates the other 7j from the lower half J:, divides the copy paper conveyance path, and removes each component. 11: It has the advantage of being relatively easy to remove from JR, but
Accurate positioning between the rotating drum and the developing device requires quite complicated work, and it is especially difficult for people to place one of the lower halves of the Support,
It takes a lot of effort to separate the other half from the lower half and divide the copy paper conveyance path, making it difficult to replace each constituent fortress.

On the other hand, regarding the latter, one of the lower halves is pivoted and the other is spaced apart from the lower half, and there is no disadvantage associated with dividing the copy paper transport path, and it is possible to use large electrostatic copying machines. machine use C
It is applicable.

The applicant of this patent has already filed a patent application for the latter electrostatic copying machine (see Japanese Unexamined Patent Publication No. 181058/1983), and its configuration number is as shown in FIGS. 15 and 16.

That is, the rotating drum (41') and developing device (43') can be removed through an opening (55') formed at a predetermined central position of the vertical front plate (18') of the copying machine body (1'). The attached support frame (5') can be pulled out. Then, a rotating drum (41') and a developing device (
43') is connected between a pair of support walls (51') and (52') which are connected by a horizontal member (53') and constitute a support frame (5'), as detailed below. This is J, the sea urchin, and the sea urchin.

The rotating drum (41') has a photoreceptor layer (400') on its outer peripheral surface.
) is placed on the right side of the cylindrical body (422), and a disk (
423), a boss part (not shown) extending outward from the disk (423) and a shaft support member (415') attached to the boss part are provided, and the support member (415') is attached to the boss part. Wall (5
The shaft supporting member (501') is fixed to the supporting member (501')
The rotating drum (415') is supported by the rotating drum (415').
') is positioned. In addition, the developing device (43')
It has a plate 'vJ (424) on the front and back sides, and a horizontal abutting lower edge (426) that comes into contact with the shaft support member (415') at the tip of the plate (424) on the rotating drum (41') side. A protrusion (425) is provided, and a protrusion (425) is provided.
The leading edge (427) located below the supporting member (501') is provided with a heavy abutting leading edge (419') that comes into contact with the vertical abutting surface (507') of the support member (501'), Ir1 by the abutting lower edge (426) and the abutting leading edge (419')
The relative positional relationship between the single rotation drum (41') and the developing device (43') can be regulated.

The mounting body (520) whose position with respect to the rotating drum (41') can be adjusted by means of a long hole (521) and a screw (not shown) with respect to the support wall (51') is attached to a protrusion receiver (pull). (522), and the plate material (424)
The attachment protrusion (421') protruding from a predetermined position of the protrusion receiver [1 part (522)] is brought into contact with the ζ edge (4
26) and the abutting edge (419') to accurately position the developing device (43') relative to the rotating drum (41'), and tighten the screw (not shown) to fix the mounting body (520). can be installed accurately.

Therefore, the abutting edge (426) is connected to the rotating drum (41').
) and the attached projection (415').
21') in a state where the protrusion receiver is engaged with the part (522),
When the abutting edge (419') comes into contact with the abutted surface (50?'), move the developing device I (43') and remove it with a screw (not shown) (=1 main body). By fixing (520), the developing device (43') can be accurately moved from cellar 1 to cellar 1.

After the photosensitive drum has been properly loaded, replace the protrusion holder (1 part (522
) to remove the attached protrusion (421') by lifting the developing device (43') upward.
This has the advantage that the developing device (43') can be easily taken out.

However, the mounting body (520) is attached by screws (not shown).
During this time, it is necessary to prevent the position of the developing device (43') from shifting, so there is a problem with the work f1.
3'), the shaft support member (415') and the lower edge (42B), the support member (!i01') and the abutment tip edge (419'), and the protrusion receiver part (522). It is necessary to bring the developing device (43') close to the rotating drum (41') while confirming the position of the mounting protrusion (421') and the mounting protrusion (421'). 4
For the photoreceptor layer (400') of 1'), the developing device @ (43
There is also a problem in that an unforeseen situation may occur in which the end of the holder, for example, the protrusion (425), causes an undesirable adverse effect.

Also, with the support frame (5') pulled out, the developing device (4)
3'), so it is not possible to attach or detach it.
With the developing device (43') removed, remove the support frame (
5') may be pushed in, in which case the copying operation may be performed without changing 1! In this case, there is a problem that no copy image is formed on the protective paper, which is a cause of so-called mistakes.

<Purpose> The present invention has been made in view of the above points, and it is possible to improve the work v1 by eliminating the need for screw tightening work, and the accompanying work to prevent positional deviation of the developing device. 11- To prevent unforeseen situations by regulating the mounting direction of the developing device in a certain direction, and to ensure that the image of the work is correct. To provide a method for attaching and detaching a developing device that can reliably prevent the inconvenience of letting a supporting frame body equipped with a rotary drum into a copying machine main body in a deaf manner.

<Configuration> The electrostatic copying machine of this invention for achieving the above purpose has the following features:
The H pull developing unit WnI1 side of the loading machine guides the document surface through a lens to a photoreceptor disposed on a rotating drum to form an electrostatic latent image on the photoreceptor. J3 is an electrostatic copying machine that uses a developing device to visualize images into tonneau images.
A support frame that can be pulled out from the vertical front plate of the copying machine body includes a support part that rotatably supports the rotating drum, a contact surface that regulates the horizontal position of the developing device, and a guide that regulates the top position. A support member having a portion is provided, and
These supporting members can be independently rotated in one direction from the base position, and can be moved toward the rotating drum at the reference position.
7. The removing member is always urged toward the rotating drum and has a set number, and by engaging the engaging portion provided at a predetermined position of the developing device at a predetermined position of the removing member, the developing device is removed from the rotating drum. An engaging portion is provided at a predetermined position of the above-mentioned detachable member, and engages with a predetermined position of the copying machine body when rotated from the reference position to perform a predetermined pushing operation. It is characterized by forming a push-in control section that prevents

<Example> The above is explained in detail with reference to the appendix +1 drawing showing the example.
Ru.

FIG. 1 is a schematic diagram showing the internal mechanism of an electrostatic copying machine.

(1) has a copying machine main body C, which is equipped with a document tray (11) with a document holding plate on the first side, and two paper feeding cassettes (1) at the bottom of the right side. 12') (13)
Remove the paper and install the tray (14) to receive the copy paper (P) that has been copied completely at the specified position on the side surface of the i side. Then, a partition plate (1!) is installed at a predetermined position inside the interior to form a J, S, -1 part chamber opening 6) and a G part chamber (11). A reciprocating optical system (2) is installed in the 4ζ (16), and a copy processing unit (1) is installed in the lower chamber (17).
A copy paper transport section f31 is also provided.

The optical system (2) includes a light source (21), a first reflecting mirror (22) having a curved reflecting surface, a second copper mirror (23), and a third mirror.
Ashakyo (24), 4th bronze mirror (2!+), 1 Nons (2
6), and a fifth reflecting mirror (27),
In addition, the 15th light #1 (21) and the first reflecting mirror (22) t
J, one copy! It is possible to sequentially scan and expose 10 originals on the original table (11) from L (-), and the reflected light from the originals is reflected by the light gi (21) and the first The second mirror moves following the movement of the bronze mirror (22).
Projection mirror (23) to fourth reflection mirror (25), lens (26
), the surface of a rotating drum (41) to be covered later is irradiated through a slit (28) formed at a predetermined position of the fifth reflecting mirror (27) and the partition plate (1!i).

The copy paper transport unit (3) includes paper feed rollers (31) and (32) that take out copy paper ([)) one by one from each cassette (12H13) and feed it to the registration roller (34) in one stroke. , a conveyance roller (35) that feeds the copy paper (P) from the resist roller (34) to the copy processing section (4), and a transport roller (35) that feeds the copy paper (P) from the copy processing section (4), and the copy paper (P) that has been peeled off from the copy processing section (4). )), a heating and fixing roller (37) that heats and fixes the copy paper (P)-l:, and a heat-fixing roller (37) that heats and fixes the copy paper (P) after heating and fixing. υ1 sent toward the saucer (14)
It consists of a paper feed roller (38) and a paper feed roller (38).
31H32), it is possible to feed one sheet of copy paper (P) in the desired cassette (12) or (13).

Copy processing unit r4) j, i, provided approximately in the center of the lower chamber (17), and rotates in one direction (arrow A1 in the figure) for each copying operation.
A rotating drum (41) that rotates a predetermined number of times in one direction (13) is installed, and around the rotating drum (41) are a charging roller (42), a developing device (43), and a transfer charger (4).
4), Stripping It Buyaja (45), and Creep (4)
6) are provided in this order. Therefore, after the photoreceptor layer of the rotating drum (41) is uniformly charged by the charger (42), an electrostatic latent image corresponding to the original is formed by light irradiated through the slit (28), and then developed. Device (4
3), the toner is adsorbed to form a toner image, and then the transfer charger (44) transfers the toner to the transport rl-ra (35).
) The toner image is transferred onto the copy paper (1) fed from ), and the copy 1 (P) is peeled off from the rotating drum (41) by a peeling charger (45).Finally, the copy 1 (P) is rotated by a cleaner (46). One copy process can be performed by collecting the toner remaining on the drum (41).

To explain in more detail with reference to FIG. 2, TJi! The image device (43) includes a magnetic brush machine 1ii (402), a developer guide member (406),
A developer stirring mechanism (407) is provided, and a toner particle replenisher (/108) is provided in series with the upper part of the developer housing (401).

The magnetic brush mechanism (4021) is located close to the surface photoreceptor layer (400) of the rotating drum (41), and is composed of a cylindrical sleeve that is rotated in the direction of the arrow A2. A stationary permanent magnet (404) in the shape of a ring is disposed within the portion (403).
), and forms a trap setting member (405) for setting the thickness of the developer layer magnetically held on the outer surface of the sleeve member (/103) to an appropriate value. Further, the developer guide section 0 (406) transports the developer peeled off from the sleeve member (403) by the spike length setting member (405) to the rear h (in FIG. 2) from the magnetic brush mechanism (402). The developer agitation mechanism (407) located on the right side) is one that drops down to the top.
08) is a toner particle ill +J+
r+ (411), and this toner particle replenishment roller (411) whose surface is formed of porous sponge or other material.
2) is rotatably mounted, and when the toner particle replenishment 1-1-ra (412) is rotated in the direction of arrow △3 by a driving means (not shown), the toner particles are moved to the developer stirring mechanism (407). You can fall down to ten. The developer agitator I (407) also handles the developer dropped from the developer guide member (406) and the developer replenisher (408).
] - The toner particles are mixed and stirred to uniformly mix the carrier particles and toner particles in the developer, and the particles 1 to 1 are transferred to the triboelectrification zone 11 magnetic brush mechanism (40
2) It is something that is sent to the side.

In addition, (5) is the copier water K (in the t section room (17) of 11),
A support frame removably mounted through a vertical front plate (18) (see Figure 3), and a rotating drum (41).
, the developing device (43), and the cleaner (46) are supported while maintaining accurate relative positions at h.

To explain in more detail with reference to FIG. 3, the support frame (5
) has a front support wall (51) and a rear support wall (52),
A horizontal member (53) (5) is installed between both supporting walls (51) (!+2).
3) J: is formed by connecting with J:,
A guide rail (54) (!i4) slidably engaged with a guide rail (not shown) installed in the lower chamber (17) of the copying machine main body (1) and a horizontal member (53) ( 53
) can be pulled out and installed by slidably engaging the two. From the vertical front plate (18)
An opening (55) having the same shape as the front support wall (51) is formed in the front support wall (51), and the front support wall (51) and the vertical front plate (18) are supported up to the point where they meet. The frame body (5) can be pushed in.

Note that (56) is a grip provided on the front support wall (51).

The mounting structure of the rotary drum (41) and the developing device (43) to the support frame (5) will be described in detail with reference to FIGS. 4 to 8.

The front support 1 (5, 1) and the rear support wall (
52), supporting members (
501) (!+02) is attached by screwing or the like, and extends in the axial direction of the rotating drum (41) to the support portions (503) (504) that form the approximately semicircular shape of each support member (501) (502). Attached to the boss part (413) (414)
The rotary drum (41) is positioned in a rotating position by supporting the shaft support members (415) and (416). Further, guides N are provided at predetermined positions of the support members (501) (502) in close proximity to the support portions (503) (504).
(50h) At (506), a protruding flattened portion (417) (
418), the upper and lower parts 4 of the developing device (43) are accurately controlled, and the developing device (43) is moved close to the rotating drum (41) along the guide grooves (505) and (506). You can move it closer or further away.

Then, abutting surfaces (507) and (508) are formed at predetermined positions of the support members (501) and (502), and abutment leading edges are formed on the front wall and the rear wall of the developing housing (/101), respectively. (4190420) and the developing device (43) moves toward the rotating drum (41) in 11.
I'm trying to RL.

In addition, the guide grooves (!1
0!1) (506) On one side, a sharp neck member (!109) is attached (pullable) so that it can slide and rotate downward.

Particularly, the side attached to the rear support wall (52) will be explained below.

That is, the detachable member (509) attaches the developing device (4
3) A recess (511) is formed to engage with an engagement pin (421) protruding from the rear wall. And the support frame (
5) A substantially hook-shaped window hole (51) formed in the rear support wall (52).
2) Attach the shaft (513) of the detachable part +J (!109) to the slide and rotation IIT function, and also attach the regulating shaft (!
! 114) is slidably installed. Here, we will make the bent side of the hook-shaped window hole (512) engageable with the regulating shaft (514), and the other side will be engaged with the shaft (513).
While the detachable member (!109) is rotated upward by °C about the shaft (513), it can be moved toward the rotating drum (41) by the spring (Fi15), and the spring (!i 1
! e-axis (513) when slid against i)
It is constructed so that it can be rotated downwards around the center. Of course, the positional relationship between the support member (501) and the detachable member (500) is such that the protruding flat plate portion (417) is in the guide groove (50!i).
), by rotating the detachable member (509) upward, the recess (511) and the engagement pin (421)
It is set so that they are engaged.

In addition, the -1- regulation shaft (!114) has a
A grip part (514'a) extending on the side opposite to the shaft (513) is formed = 19-, and the grip part (514a) on the rear support wall (52) side also serves as a push-in control part, and the A hole (19a) extending horizontally is formed in the middle rear face plate (19). Soshi-
(The shape of the hole (19a) is that of the detachable member (509).
The grip part (!
114a) and is formed so that the grip portion (514a) can be inserted through it.
5), then insert the protruding flat plate portions (417) (418) of the developing device (43) into the guide grooves (!105) (
506) and moved to the rotating drum (41) side 1
i- (see Figure 9), the engagement pin (421) is attached to the detachable member (
509) located directly in the recess (511) (10th
(see figure), rotate the detachable member (509) upward about the shaft (513) and place the engagement pin (421) in the recess (511).
), and the spring (515) connects the detachable member (!+09J) and the developing device (43) to the rotating drum (
41) can be moved to the side (see Figure 11).

Then, the movement G of the current digit j (43); 1, the contact surface (!
107) (508) and the abutment leading edges (419) (420), the relative position between the developing device (43) and the rotating drum (41) can be accurately maintained.

On the other hand, when removing the developing station G (43), the detachable member (
509) against the spring (515), and then rotated downward about the C-axis (513) to disengage the engagement pin (421) from the recess (511).
All you have to do is pull out the developing device (43).

Furthermore, when the developing device (43) is in the closed state, the IB2B2 material member 09) rotates downward, and the gripping portion (51) rotates downward.
4a) as a whole faces directly to the hole (19a),
By pushing the support frame (5), the grip part (514
a) can be inserted into the hole (19a) and positioned at a predetermined set position, and when the 7J developing device (43) is removed, the detachable member (509) rotates downward and the grip part (
514a) is rotated by a predetermined angle with respect to the hole (19a), so when the support frame (5) is pushed in, the grip portion (514a) is not inserted into the hole (19a), Since the rear face is in contact with the vertical number (19), it is possible to reliably prevent it from being pushed into the predetermined position.

As is clear from the above description, in the case of this embodiment, there is no need for operations such as screwing and holding the developing device in place during the screwing operation, and moreover, the gripping portion is attached to the support frame. It is easy to grasp because it protrudes from the front and rear, and it is extremely easy to attach and detach.It also prevents the rotating drum from being damaged by restricting the mounting direction of the developing device to one direction.
This means that there is no possibility of any leakage or the like.

In addition, only when the developing device is set, the support frame can be pushed to a predetermined set position, and the fact that it has been pushed to the predetermined set position can be detected by a limit switch, etc. J: It is possible to reliably prevent the execution of a copying operation when the developing device is not set.

Figures 12 to 14 show the mounting operation of the developing device according to other embodiments, and Figure e is shown. A lever (516) that engages with the pin (421) and rotates is provided, and an operating shaft (!109) is provided at a predetermined position of the lever (516) that rotates the detachable member (!109) upward as the lever (516) rotates. The only difference is that 517) is provided.

With the above configuration, the rotating drum (41) is connected to the support frame (
5), move the protruding flat plate part f417) (/118) of the developing device (43) to the guide part (505) (
506) engaged with 1! , the engagement pin (421) moves toward the rotating drum (41), causing the engagement pin (421) to move toward the lever (51).
If it comes into contact with B) and moves further (see Figure 12),
When the lever (516) is rotated in the opposite direction of the engagement pin (421), the operation shaft (517) moves the detachable member (509) around the axis (513). direction (see Fig. 13), and remove the detachable member (509).
) rotates to the top layer, the detachable member (509) and the developing device (43) are moved toward the rotating drum (41) by being pulled by the spring (51!l) (see Figure 14). ). In this case, the relative positions of the developing device (43) and the rotating drum (41) are the same as in the above embodiment. Edge (419
) (420).

On the other hand, when removing the developing device (43), the detachable member (
! i 09 ) against the spring (515) and then rotated downward to disengage the engagement pin (421) from the recess (511), and then pull out the developing device (43). good.

Therefore, in the case of this embodiment, the developing device (43)
-Ll stop on the way +l t L, 11th movement (' lt
The developing device (43) can be installed without performing the operation of rotating the tube member (509) downward.
You can further improve your bamboo control.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, as shown by the imaginary line in FIG. lJ, sea urchin, by forming the grip part (514a) to extend toward the axis (!113), contrary to the above embodiment, the grip part (514a)
514a) can be engaged with the same diameter part of the opening (51i) of the front vertical plate (18), and the hole (19a) of the rear vertical plate (19) can be omitted. In this case, the developing device When it is not set, the support frame (5) can hardly be pushed in, and it can be immediately determined that the developing device is in the non-let state.
) can effectively prevent the knob from being damaged by strong impact. Also, 162 months (,'+04])
It is possible to use a spring to force the lever to rotate at all times, or to provide this configuration with a lever (!116) that engages with the engagement pin and rotates, etc. Various changes can be made within the scope without changing the gist of the invention.

Effects> As described above, in the present invention, the vertical position of the developing device is determined by the guide portion that regulates the vertical position with respect to the rotating drum, and then the engaging pin is engaged with the llR1 member that has rotated to the reference position. In this state, the developing device can be moved by the spring (i) by sliding the developing device toward the rotating drum. In addition to simplifying the attachment/detachment operation, the mounting direction of the developing device can be restricted to one direction, eliminating the risk of damaging the rotating drum, and moreover, when the developing device is not set, the supporting frame body can be moved to its normal position. It has the unique effect of being able to reliably prevent copy errors by preventing filler 1~.

In addition, if the detachable member is configured to rotate following the setting of the developing device, there is no need to take the trouble of rotating the detachable member, which further simplifies the mounting operation of the developing device. to play.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the internal mechanism of the electrostatic copying machine, Fig. 2 is an enlarged vertical sectional view of the copying processing section, and Fig. 3 is a perspective view showing the support frame in the pulled out state. Fig. 4 shows the state in which the rotating drum and the developing unit H are attached to the support frame. Fig. 5 is a partially cutaway plan view of the same as above. Fig. 6 is a perspective view of the support member. Fig. 7 is 12 is an exploded perspective view showing the relationship between the rear support wall of the support frame and the detachable portion l; FIG. 8 is a partially cross-sectional plan view; FIGS. 14 are explanatory diagrams showing the mounting operation of the developing device in other embodiments, FIG. 15 is a perspective view showing a conventional example, and FIG. 16 is a front view of the same. (1)... Copying machine body, (2)... Optical system, (18
)... Vertical front plate as the front side, (19)... Vertical rear plate as the rear side plate, f19a)... Hole, (41
)...rotating drum, (42)...electrostatic charger,
(43)...Developing device, (44)...Transfer charger, (45)...Peeling N1 charger, (46)...
Cleaner, (4191 (420)... Contact green, (4
21)...Engagement pin as an engagement part, (5)...Support frame, (52)...Rear support wall, (55)...Opening, (!101) (502) ...Support Department Month, (503
)(!+04)...Bearing part, (!105)(506)
...Guide groove as a guide part, (507) (508)
... Abutted surface, (509) ... Detachable member, (511)
... recess as an engaging part, (512) ... window hole, (
513)...Axis, (U)14)...Regulation axis, 1i1
4a)...Gripping part as a push-in control part, (!116)
···lever. -27~

Claims (1)

[Claims] 1. The original image is passed through the lens onto the rotating drum. onto the photoreceptor disposed on the photoreceptor. to form an electrostatic latent image, and It is visualized into a toner image by a developing device. In electrostatic copying machines, the copying machine Support that can be pulled out from the vertical front plate of the main unit The frame body rotatably supports the rotating drum. to regulate the horizontal position of the supporting part and the developing device. Regulates the contact surface and vertical position. A support member having a guide portion is provided. Both have a reference position separately from this support member. Can be rotated from one position to the other, and can be rotated from one position to the other. Attachment/detachment that can be moved to the rotating drum side The component is always biased toward the rotating drum. at a predetermined position of the removable member, The engaging part provided at a predetermined position of the developing device The developing device is rotated by rotating the drum. The engaging part that moves inward toward the A predetermined location for the above-mentioned detachable member is provided. position, the copier when rotating from the reference position Engages with a predetermined position on the main body and presses in a predetermined position. A push-in control section is formed to prevent the operation. In an electrostatic copying machine characterized by Development device attachment/detachment mechanism. 2. The push control section is located on the rear support wall side of the support frame. The main body of the copying machine is Insert the push control part in the standard position on the rear plate. The above patent claim in which a common hole is formed In the electrostatic copying machine described in item 1, Development device attachment/detachment mechanism. 3. The push control section is located on the rear support wall side of the support frame. rotation from the reference position. When the copy machine is operated, the Engages with the periphery of the opening for inserting the support frame. The support frame is shaped to prevent the support frame from being pushed in. Claim 1 above: The developing device in the electrostatic copying machine described above is removed. Attachment mechanism. 4. The push control part is behind the support frame and behind the support wall. Claim no. For the electrostatic copying machine described in paragraph 2 or 3. Development device attachment/detachment mechanism. 5. The push-in control section is for rotating the detachable member. The scope of the above patent claim that also serves as a handle part Development in the electrostatic copying machine described in item 4 Device attachment/detachment mechanism. 6. The detachable member is moved to the reference position by manual operation. The above patent is one that is rotated in the direction of An electrostatic copying machine according to claim 1 Developing device attachment/detachment mechanism. 7. The detachable member follows the setting operation of the developing device. Therefore, although it is rotated toward the reference position, As stated in claim 1 above, Developing device attachment/detachment machine in electrostatic copying machines Structure. 8. The detachable member is made by the engaging part of the developing device. Move the lever toward the reference position. The above patent claim is rotated by In the electrostatic copying machine described in scope item 7 Developing device attachment/detachment mechanism. 9. Direction of movement guidance of the developing device by the guide section and the rotation drive of the detachable member at the reference position. The directions of movement toward the ram side are parallel to each other. Claims 1, 6 and 6 above In the electrostatic copying machine described in paragraph 7 or paragraph 8, Development device attachment/detachment mechanism.