JPH089731Y2 - Detaching device for photoconductor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field The present invention relates to a device for attaching and detaching a photoconductor mounted on a copying machine or the like.

(2) Prior Art In the conventional attachment / detachment device of this type shown in FIG. 6, when the photoconductor 51 is removed from the mounted support member 61, the pressure bracket 73 is moved in the direction indicated by the arrow A to move the photoconductor shaft. The first and second bearings (not shown) that support 52 are unsupported to release the support. However, prior to releasing the support, the operator must manually support the photoconductor 51 from below.
May fall downward as indicated by arrow B, and may be damaged by hitting a metal object or the like. In addition, when setting, the worker must support it by hand until the end of setting, which is a drawback that the setting property is poor.

(3) Purpose The present invention eliminates the above-mentioned conventional drawbacks, and provides a photosensitive member attaching / detaching device capable of protecting the photosensitive member at the time of attaching / detaching the photosensitive member and improving workability of attaching / detaching the photosensitive member. And

(4) Structure In order to achieve the above-mentioned object, the present invention relates to a photoconductor in which a photoconductor shaft is integrally attached by front and rear flanges,
A first one in which one photoconductor shaft end is fixed to one support member
While being supported by a bearing, the other end of the photoreceptor shaft is axially moved into a case holding member attached to the other supporting member at a position facing the first bearing of the one supporting member. When the photoconductor is detached from both the supporting members, the photoconductor is supported by a second bearing which is provided so that
After moving the second bearing to disengage from the other photoconductor shaft end, the photoconductor is moved to disengage one photoconductor shaft end from the first bearing, and the photosensing by the first and second bearings is performed. The support members for both shaft ends of the body are opened, and the support members near the lower outer periphery of the photoconductor in a state where both shaft ends of the photoconductor are supported by the first and second bearings. Is provided with a holding pin capable of mounting and holding the outer peripheral surface of the photoconductor, and the distance a between the outer surface of the photoconductor shaft and the inner surface of the case holding member is equal to the outer surface of the photoconductor and the outer surface of the holding pin. It is characterized in that it is larger than the distance b of.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a hollow cylindrical photoreceptor, which comprises a rear flange 3 fixed to a photoreceptor shaft 2 and a front flange 4 slidably attached to the photoreceptor shaft 2. Each of them is assembled in a state of being pressed from both end sides by the tapered surface formed on the outer periphery. 5 is the front flange 4
, 6 is a spring compression member for compressing the spring 5 to a predetermined length so as to adjust the biasing force, and is attached to the male screw formed on the photoreceptor shaft 2. It is screwed. Then, these photoconductor 1, photoconductor shaft 2, front and rear flanges 3, 4, springs 5,
The photoconductor drum unit 7 is formed by the spring compression member 6.
Is configured.

A drive shaft 10 is coaxially connected to one end of the photoconductor shaft 2 through a pin 8 by a pin 8. The drive shaft 10 is screwed and fixed to a side plate 11 serving as a support member of the copying machine body. It is supported by a bearing 13 in a bearing case 12. A pulley 15 is attached to an outer end portion of the drive shaft 10 protruding from the bearing 13, and a torque is transmitted from the drive source (not shown) to the drive shaft 10 via the pulley 15.

A front bearing case holding member 17 is screwed and fixed to the other side plate 16 as a supporting member of the main body of the copying machine which opposes the rear bearing case 12, and the other end portion of the photoconductor shaft 2 is held in the holding member 17. A front bearing case 20 having a bearing 18 for supporting is slidably accommodated and retained. A connecting shaft 21 is fixed to the front bearing case 20 so as to be co-axial with the photoconductor shaft 2, and a center hole of a pressure bracket 23 is provided at the connecting shaft 21 at a stopper 24 provided at the shaft end of the connecting shaft 21. Is inserted so that it can be engaged with. Between the pressure bracket 23 and the front bearing case 20, the pressure bracket 23 is screwed onto the male screw formed on the outer peripheral surface of the holding member 17 in the state shown in FIG.
A pressure spring 25 for urging and pressing 20 in the direction of the photoconductor shaft 2 is interposed. The distance a between the outer surface of the photoconductor shaft and the inner surface of the case holding member is larger than the distance b between the outer surface of the photoconductor and the outer surface of the holding pin.

As shown in FIGS. 1 and 2, the photoconductor 1 has side plates 11 and 16 of the main body of the copying machine.
In the state where the photoconductor 1 is mounted between them, the photoconductor 1 is held on the inner surfaces of the side plates 11 and 16 facing each other near the outer periphery of the lower part of the photoconductor 1 when the photoconductor 1 is attached or detached. pin
27 and 28 are paired and fixed by caulking or the like at a predetermined interval that is equal to a perpendicular line passing through the center of the photoconductor 1. The holding pins 27, 28 have their outer surfaces in contact with each other dipping-processed so as not to damage the photosensitive member 1 when holding it.

In the above, in order to remove the photoconductor 1 from the side plates 11 and 16 of the main body of the copying machine, from the male screw of the holding member 17 to the pressure bracket 23.
After unfastening the
Move away from. As a result, the front bearing case 20 fixed to the connecting shaft 21 that engages with the pressure bracket 23 and the stopper 24 slides in the holding member 17 in the direction away from the other end of the photoconductor shaft 2, and the bearing 18 Deviates from the photoconductor shaft 2 (FIG. 3). Next, the pin 8 connecting one end of the photoconductor shaft 2 and the drive shaft 10 is pulled out, and the photoconductor drum unit 7 is moved in the direction of the holding member 17. As a result, one end of the photoconductor shaft 2 is disengaged from the hole of the drive shaft 10, and the photoconductor 1 whose both ends are released is placed on the holding pins 27 and 28 arranged near the outer periphery of the lower portion. Then, the state becomes removable from the side plates 11 and 16 of the mounted copying machine main body. At the time of this removal, since the holding pins 27 and 28 are provided near the outer periphery of the lower portion of the photoconductor 1, there is no fear that the photoconductor 1 will fall, and smooth removal is possible.

On the other hand, in order to set the photoconductor 1,
As shown in FIG. 3, the front bearing case 20 is slid to the end position away from the other end of the photoconductor shaft 2 in the holding member 17, and then the photoconductor shaft 2 of the photoconductor 1 is lifted horizontally. One end of is inserted into the hole of the drive shaft 10 and is connected by the pin 8. Next, after aligning the other end of the photoconductor shaft 2 with the axis of the connecting shaft 21, the front bearing case 20 is moved toward the other end of the photoconductor shaft 2 in the holding member 17 via the pressure bracket 23. While sliding, the pressure bracket 23 is screwed onto the male screw of the holding member 17. By this screwing, the bearing in the front bearing case 20
When 18 is inserted into the other end of the photoconductor shaft 2 and is supported by the pressure spring 25 under pressure, the setting is completed. At the time of this setting, since the photoconductor 1 on the other end side of the photoconductor shaft 2 can be held by the holding pin 28, one end of the photoconductor shaft 2 is inserted into the hole of the drive shaft 10 and the pin 8 is It is extremely easy to install and has good setability.

(5) Effects Since the present invention has the above-mentioned structure, when the photoconductor is attached or detached, it is only necessary to move the bearing from the support position of the photoconductor, and it is necessary to perform the same operation to the holding member as the conventional one. The operation of attaching and detaching the photoconductor is not troublesome, and the holding surface of the outer periphery of the photoconductor is supported by the holding member at that time, so that the photoconductor does not drop and get scratched. It is also possible to prevent the outer surface of the shaft from colliding with and damaging the inner surface of the case holding member. In this way, it is possible to sufficiently protect the outer surface of the photoconductor and the photoconductor shaft. Can be largely omitted, and the workability can be significantly improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical front view showing an embodiment of the present invention, FIG. 2 is a transverse plan view of the same as above, FIG. 3 is a partial transverse plan view for explaining the operation, and FIG. FIG. 3 is a front view, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a vertical sectional front view showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Photoconductor, 2 ... Photoconductor shaft 8 ... Pin, 10 ... Drive shaft 11,16 ... Side plate, 12 ... Rear bearing case 13,18 ... Bearing, 17 ... Holding member 20 ... Front bearing case, 21 ... Connection shaft 23 ... Pressure bracket, 24 ... Stopper 25 ... Pressure spring, 27,28 ... Holding pin

Claims (1)

[Scope of utility model registration request] 1. A photosensitive member having a photosensitive member shaft integrally attached thereto by front and rear flanges, wherein one photosensitive member shaft end is supported by a first bearing fixed to one supporting member, and the other is supported. A second bearing provided axially movably in a case holding member attached to the other supporting member at a position where the shaft end of the photosensitive member faces the first bearing of the one supporting member. When detaching the supported photoconductor from both of the support members, the second bearing is moved to disengage from the other photoconductor shaft end, and then the photoconductor is moved to move one photoconductor shaft end to the first end. By detaching from the first bearing, support of both shaft ends of the photoconductor by the first and second bearings is opened, and both shaft ends of the photoconductor are supported by the first and second bearings. In the state, on the supporting member near the lower outer periphery of the photoconductor,
A holding pin capable of mounting and holding the outer peripheral surface of the photosensitive member is provided, and the distance a between the outer surface of the photosensitive member shaft and the inner peripheral surface of the case holding member is equal to the outer peripheral surface of the photosensitive member and the outer circumference of the holding pin. A device for attaching and detaching a photoconductor, wherein the distance is larger than a distance b from the surface.