JPS58200274A - Attaching and detaching device of member such as photoreceptor or the like in copying machine - Google Patents

Abstract

PURPOSE:To prevent the damage of members A and B when a member C is attached or detached, by providing a connection/separation switching member which regulates the member B such as a separating pawl so as to separate from the member A in accordance with detachment of the member C. CONSTITUTION:A stopper 27 is slided by a compression spring 26 until the stopper 27 is brought into contact with a body front plate 7, and a conical cam 24 is brought into contact with a back part 5a of a separating pawl 5 and is pressed to it, and the separating pawl 5 is turned counterclockwise so as to be separated from a photoreceptor 1. Since the photoreceptor 1 is detached in this state where the separated state of the separating pawl 5 is secured, the photoreceptor 1 and the separating pawl 5 are not damaged. Because of this separation, a driving source such as a solenoid is unnecesary, and the constitution is inexpensive and simple, and only ordinary attaching and detaching operations are required but a special operation is not required. The quantity of release of the separating pawl 5 from the photoreceptor 1 is set properly on a basis of the positional relation between a shaft 20 and a conical shaft 23, shapes of the separating pawl 5 and the conical cam 24, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching and detaching members such as a photoreceptor of a copying machine.

Generally, in a copying machine, a photoreceptor is detachably set, and a separation claw is provided in contact with the photoreceptor to prevent the transfer paper from wrapping after transfer. In this case, some separation claws use a solenoid to switch between approaching and separating from the photoreceptor, but the use of a solenoid increases mechanical complexity and costs. In addition, there are some models that keep the separation claw in constant contact with the photoconductor and do not have a separation release mechanism, and although this poses no particular problem in terms of cost, there is a high possibility that the tip of the separation claw may damage the surface of the photoconductor when the photoconductor is attached or removed. Conversely, the separation claw may also be damaged. moreover,
Some models are designed to manually release the separation claw from the photoconductor, but if you forget to release the separation claw and attach/detach the photoconductor, the same problem as the above-mentioned permanent contact type will occur, and the problem is that the separation claw does not come into contact with the photoconductor when it is set. If you forget, it may cause a jam at the separation claw.

The present invention has been made in view of the above points, and in the case where a member such as a separating claw is brought into contact with a detachable member such as a photoreceptor, the member such as the photoreceptor can be removed with a simple and inexpensive structure. It is an object of the present invention to provide a device for attaching and detaching members such as a photoreceptor of a copying machine, which can separate members such as a separation claw and prevent damage to both parts without requiring special operations when attaching and detaching the photoreceptor.

The present invention focuses on a member C that is removed before removing a member A such as a photoreceptor, and in conjunction with the removal of this member C, a member Bt such as a separating claw is regulated to be separated from the member A. By providing the contact/separation switching member, it is possible to maintain the separated state of member B by simply performing the normal removal operation of removing member C and then removing member A, thereby preventing damage to both members A and B during attachment/detachment. It is designed to prevent this.

An embodiment of the present invention will be described based on the drawings.

This embodiment is applied to an attachment/detachment device for a photoconductor (1) as member A, and as shown in FIG. , a separation charger (3), a conveyor belt (4), and a separation claw (5) which is member B are arranged in this order. Furthermore, (6)
is transfer paper. Here, as shown in FIG. 2, the photoreceptor (1) has a bearing αQα on the periphery of a shaft (9) supported between the front side plate (7) and the rear side plate (8) of the main body, and a front flange (
6) It is rotatably attached via the rear flange (2) and rotates according to the rotation of the drive gear α◆ fixed to the rear flange (to). In addition, the front side plate of the main body (7
) is formed with an opening (G) large enough to allow the photoreceptor (1) to be inserted through it, and outside of this opening (to) is a reference pin 0 → positioned by the front end of the shaft (9). A drum support plate αη serving as a receiving member C is provided. This drum support plate αη is integrated with the knob α and is attached to the front end of the shaft (9) with a screw (6). On the other hand, the separation claw (5
) is set so that it rotates around a shaft supported between the front side plate (7) and rear side plate (8) of the main body, and its tip comes into contact with the photoconductor (1) due to its own weight. , separation claw (
5) may be integral with the shaft, or only the separating claw (5) may be rotatable. ) Therefore, in the contact/separation switching member which is slidably supported through the hole (C) between the front side plate (7) and the rear side plate (8) of the main body, a contact/separation switching member) is provided on the back of the separation claw (5). There is. In other words, the contact/separation switching member (A) has a conical cam shaft whose front end is regulated by the force of the drum support plate α, and a conical cam (C) integrated at a predetermined position on the conical cam shaft (E). It consists of a compression spring (c) that urges the conical camshaft (and the conical camshaft) forward via a receiving piece (c), and a stopper (b) that restricts the sliding of the conical camshaft (to). Here, the position of the conical cam (c) is such that when the conical cam shaft (to) is regulated by the drum support plate α, it does not contact the separation claw (5), and the conical cam shaft (■) is at the stopper (b). It is set so that it presses into contact with the back part (5a) of the separation claw (5) in the state where it is regulated by.

In such a configuration, under normal conditions, the drum support plate α force is attached to a predetermined position, and the conical camshaft (to) resists the biasing force of the compression spring (c). As shown in FIGS. 3 and 4, the conical cam (C) takes a position apart from the separating claw (5). Therefore, the separation claw (5) is connected to the contact/separation switching member (a).
The tip of the photoreceptor (1) comes into contact with the photoreceptor (1) due to its own weight and exerts a separating action.

To remove the photoreceptor (1), turn the knob (to) that is integrated with the drum support plate αη, and then remove the shaft (9) and knob 0.
Release the screw connection with the drum, remove the drum support plate αη,
This is done by further removing the front 7 langes (6) and then removing the photoreceptor (1) forward from the opening (G). Installation is done in reverse order. In this kind of removal algae cultivation,
Looking at the state of the separation claw (5), the restriction on the conical camshaft () is released due to the removal of the drum support plate a'1) prior to the removal of the photoreceptor (1), as shown in Figures 5 and 6. The stopper (goods) is slid by the compression spring (t) until it comes into contact with the front side plate (7) of the main body, and the conical cam (goods) presses against the back part (5a) of the separation claw (5) and separates. Claws (5)
is rotated counterclockwise so as to move away from the photoreceptor (1). Since the photoreceptor (1) is removed while the separating claw (5) is kept separated, the photoreceptor (1) and the separating claw (5) are not damaged. The installation is sometimes the same. For this kind of separation, there is no need to use a drive source such as a solenoid, and the structure is simple and inexpensive, and only requires normal attachment/detachment, and no special operations are required. It is something.

Note that the release amount of the separation claw (5) with respect to the photoreceptor (1) is as follows:
The positional relationship between the shaft (a) and the conical cam shaft (to), the separation claw (5)
), is set appropriately depending on the shape of the conical cam, etc.

Furthermore, the present invention is not limited to the attachment and detachment of the photoreceptor as in the embodiments, but is also applicable to any method in which members that are in contact with each other are brought into contact with and separated from each other in conjunction with a member to be removed at equal pressure during maintenance so as to retain each other. can. For example, it can be applied to the relationship between a fixing roller and a thermistor, the relationship between a fixing roller and a separating claw, etc.

As described above, the present invention provides a removable member A such as a photoreceptor.
Focusing on the member C that is removed prior to the removal of the member C, we provided a contact/separation switching member that controls the member Bt, such as a separation claw, to be in a separated state with respect to member A in conjunction with the removal of this member C. Therefore, it is possible to maintain the separated state of member B by simply performing the normal removal operation of removing member C and then removing member A, by creating an inexpensive and simple structure without using a drive source or the like. , it is possible to prevent damage to both members A and B during attachment and detachment.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a plan view showing main parts, Fig. 4 is a side view thereof, and Fig. 5 is a side view. 6 is a plan view showing the operation, and FIG. 6 is a side view thereof. l... Photoreceptor (member A), 5... Separation claw (member B)
, 17...Drum support plate (member C), 22...Contact/separation switching member 483- ] U figure 15 figure □ 5 Use paper E 711 Ichito, 3 figure] 0 figure, l

Claims (1)

[Claims] A member B such as a separating claw is provided in contact with a detachable member A such as a photoconductor, and a member C is provided to be removed prior to the removal of the member A. A device for attaching and detaching a member such as a photoreceptor of a copying machine, characterized in that a contact/separation switching member is provided for interlockingly regulating the member B to be separated from the member A.