JPH0264562A - Image forming device - Google Patents

Abstract

PURPOSE:To house a knob for transporting a unit in interlocking with the attaching/detaching actions of the unit by providing a guide for housing the knob pulled out from the unit in the unit. CONSTITUTION:When the unit such as a developing unit is placed on an opening/closing door 40 and attached to or detached from an image forming device main body, the knob 39 for transporting the unit 13 is housed in the unit 13 by the guide 42 provided in the main body. Even if the knob 39 is pulled out in the main body, the knob 39 is housed in the unit 13, in the same way, when the unit 13 is detached from the main body. Therefore, the knob is housed in the unit while interlocking with the attaching/detaching actions of the unit. Then, the knob need not be housed in the unit with a manual operation and the unit can be attached to and detached from the image forming device main body without troubles.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image forming apparatus in which an image forming unit is detachable.

[Conventional technology]

In recent years, image forming apparatuses have become smaller and smaller, and even for units that can be detached from the main body of the image forming apparatus, it is possible to use a retractable unit carrying handle that can be pulled out when transporting the unit and stored at other times. Efforts have been made to save space by reducing the protrusions from the unit when it is installed in an image forming apparatus.

The handle for carrying the unit may be made of an elastic material, or the end of the handle for carrying the unit may be pulled with a spring or the like.
-There are some items that automatically retract into the unit after being pulled out, but the device is becoming more complicated.
It becomes large.

In addition, in the case where the above-mentioned device is not attached, in order to store the image forming apparatus/unit, it is necessary to store the handle for transporting the unit into the unit after it has been pulled out.

[Problems to be Solved by the Invention] As described above, in the above conventional example, each time the unit carrying handle is pulled out to carry the unit and is attached to the image forming apparatus, the unit carrying handle is retracted into the unit. If not, the handle will get caught on the image forming apparatus body, making it impossible to install it smoothly.In addition, if the handle for transporting the unit is not stored inside the unit and it is installed inside the image forming apparatus, in the worst case, the main body and unit will be damaged. There were drawbacks.

[Means for solving problems]

According to the present invention, by providing a guide member for storing the unit carrying handle pulled out from the unit into the unit main body, when the unit is attached to and removed from the image forming apparatus main body, the unit does not have to be retracted. It is designed to be stored in conjunction with the attachment/detachment operation.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples.

FIG. 1 shows an example of an image forming apparatus to which the present invention can be applied.

The original 2 placed on the original placing glass 1 is illuminated by a lamp 3, and its light image is captured by an optical system consisting of scanning mirrors 4, 5° 6, fixed mirrors 7, 8.9, and a zoom lens lO. It is guided onto the electrophotographic photosensitive drum 11. On the other hand, the photosensitive drum 11 is also rotated in the direction of the arrow after its surface is uniformly charged by the primary charger 12.
Electrostatic latent images corresponding to the original image are sequentially formed on the surface of the photosensitive drum 11 . Developing units 13 and 14 containing toner are arranged around the photosensitive drum 11. Developing device 13.
14 visualizes the electrostatic latent image on the photosensitive drum 11. This image is transferred to a transfer paper 17 as a transfer material by a transfer charger 15.
transcribed to. After that, the photosensitive drum 11 is cleaned by a cleaner 16.
At this point, residual toner on the drum surface is removed, and the next copying process is started again.

The transfer paper 17 is fed as follows, and the original image is copied.

There are the following three methods for feeding the transfer paper 17 into the copying apparatus. In the first method, sheets are loaded in a cassette 18 and fed to a pair of rollers 20 by a feed roller 19. After passing through the pair of rollers 20, the transfer paper 17 passes through the guide plates 21, 22.
It reaches the registration roller 24 via the feeding roller pair 23.

In the second method, the paper is loaded in the cassette 25 and the paper is loaded on the feed roller 26.
It is sent to the roller pair 27 by this. The roller pair 27 has the same function as the previous roller pair 20, and after the transfer paper 17 passes through the roller pair 27, it passes through the guide plate 28. Feeding roller pair 23
It reaches the registration roller 24 via. The third method is a so-called manual paper feeding method. Bypass tray 2
Transfer paper of any size stacked on
Similar to the method described above, the sheet is fed by a feed roller 30 to a pair of rollers 31 and fed into the apparatus. The registration roller 24 starts rotating at a timing such that the visible image on the photosensitive drum II and the transfer paper 17 coincide, and the upper transfer guide 32. The transfer paper is sent to the surface of the photosensitive drum 11 via the lower transfer guide 33. As described above, the image on the surface of the photosensitive drum 11 is transferred to the transfer paper by the transfer charger 15, and the transfer paper is separated from the drum surface by the separation charger 34 and transferred to the heating roller 36a and the pressure roller 36b via the conveyance section 35. The image is sent to a fixing device 36 having a. The image on the transfer paper is fixed as a permanent image by heating and pressure in the fixing device 36, and the transfer paper 17 is sent to the first discharge roller 37, reaches the second discharge roller 38, and is then discharged from the copying apparatus. .

Next, a developing device (unit) that can be attached to and detached from the main body of the image forming apparatus.
13 and the developing device carrying handle 39, which can be retracted and accommodated in the developing device 13, will be explained.

Reference numeral 40 denotes an opening/closing door which is fixed to the main body of the image forming apparatus so as to be openable/closable and serves as a stand for the developing unit 13 when the developing unit 13 is installed in the main body of the image forming apparatus; 41 is a door placed on the opening/closing door 40; When the developing device 13 is attached to and removed from the main body of the image forming apparatus, the pressure lever is positioned so as not to disturb the attachment and detachment of the developing device 13 by escaping downward and pressurizing the developing device 13 against the photosensitive drum 11. The portion within the circle 42 is a guide for storing the developing device carrying handle 39 in the developing device 13.

Figure 4 shows the guide 42, the developing device 13, and the developing device carrying handle 3.
9 is a diagram showing the positional relationship with 9. FIG. The guide 42 is the handle 39
The conditions for storing the image in the developing device 13 are as follows. The positional relationship between the guide 42 and the developer transport handle 39 is when the developer transport handle 39 is pulled out the most (when marked ■).
The position where the guide 42 starts to taper and the handle 39
There is a condition that l>O at the position.

In addition, the tip of the guide 42 and the container 2 handle 39 of the developing device 13 are connected to each other.
The positional relationship with the state where is pushed back the most (when it is ■) must be mho and neo.

FIG. 2 is a sectional view of the developing device 13.

FIG. 3 is a top view of the developing device 13, and 43 is a pin (1) for fixing the developing device carrying handle 39 (hereinafter referred to as handle 9).
), 44 is an expansion/contraction restriction hole, which is a hole drilled in the handle 39 to determine the expansion/contraction length of the handle 39, and 45 is an expansion/contraction restriction hole that protrudes from the first developing device 13 into the expansion/contraction restriction hole 43; The pin (2) for restricting the expansion and contraction of the handle 39, and the hatched portion of the pin (46) are protrusions serving as guides to prevent the handle 39 from coming off the pin (1) 43 and the pin (2) 45.

By pulling out the handle 39 of the developing device 13 as shown by the dotted line in FIG.
It can be extended until it hits 4.

When the stretched handle 39 is held and placed on the opening/closing door 40 and inserted into the main body of the image forming apparatus, the handle 39 comes into contact with the guide 42. Here, the shape of the guide 42 is
Since the handle 39 is angled in the direction in which it is housed in the developing device 13, if the developing device 13 is still inserted into the image forming apparatus main body even after the handle 39 contacts the guide 42, the handle 39 will be placed in the second position. It is housed in the first developing device 13 as shown by the solid line in the figure. Furthermore, even if the handle 39 becomes stuck inside the image forming apparatus main body for some reason as shown by the dotted line in FIG. Since the guide 42 is angled, the developer 13 can be smoothly attached to and detached from the main body of the image forming apparatus.

[Other Examples]

In this embodiment, the guide 42 in the above embodiment is replaced with a roller guide 47.

The roller guide 47 in FIG.
It has the function of pushing down the handle 39 from the pulled out state.

The positional relationship between the roller guide 47, the developing device 13, and the handle 39 is as follows.
The condition for storing the roller in 3 is that Y>, where Y is the difference in height between the rotation center 48 of the roller of the roller guide and the height when the handle 39 is in the fully extended state (■).

If the difference in height between the lowest end of the roller guide and the top surface of the developing device 13 when the handle 39 is pushed down the most (when ■) is x and z, then X>O.

2>0 must be satisfied.

This embodiment differs from the previous embodiment only in the roller guide 47, so the function of the roller guide 47 will be explained.

In FIG. 5, when the developing device 13 is installed into the main body (toward the left side in the figure), the handle 39 and the roller guide 47 first come into contact.

When the developing device 13 is further advanced in the mounting direction, the handle 39 receives a force that pushes it downward along the circumference of the roller guide 47, and finally it reaches the state shown in ■ (the handle 39 is pushed down). state).

Conversely, even when the developing device 13 is pulled out of the main body, it is easy to see that the handle 39 is pushed down by the roller guide 47.

〔Effect of the invention〕

According to the present invention, by providing a guide member that stores the handle provided in the unit into the unit simply by attaching and detaching the unit from within the image forming apparatus, the handle can be retracted into the unit when the unit is attached and detached. Eliminate the hassle of storing it. Also, if you forget to store the handle in the unit and attach it to the main unit, the handle of the unit will only get caught on the main unit (in the worst case, the unit and main unit may be damaged). can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main body of the image forming apparatus. FIG. 2 is a sectional view of the developing device. FIG. 3 is a top view of the developing device. FIG. 4 is an enlarged view of the guide 42 and the developing device 13. FIG. 5 is an enlarged view of the roller guide 47 and the developing device 13. 13 Developing device Handle for carrying the developer guide Coro guide

Claims (4)

[Claims] (1) A unit transporting handle provided on a unit that is detachable from an image forming apparatus has a first position when transporting the unit and a second position at other times, and the unit is connected to the image forming apparatus. An image forming apparatus characterized by having a guide member that moves the unit carrying handle from a first position to a second position by being attached to the image forming apparatus. (2) The image forming apparatus according to claim 1, wherein the guide member is provided in the image forming apparatus main body. (3) The image forming apparatus according to claim 1, wherein the guide member is a part of an exterior cover of the image forming apparatus. (4) Any one of claims 1, 2, and 3 further comprising a guide member that moves the unit carrying handle from the first position to the second position when the unit is taken out from the image forming apparatus. The image forming apparatus according to claim 1.