JPH02275978A - Paper peeling device - Google Patents

Abstract

PURPOSE:To accurately perform the actions of a separation pawl and a paper guide by reciprocatively moving the shaft of a peeling device along an axis in parallel with a photosensitive drum and moving the peeling pawl and the paper guide along the photosensitive drum. CONSTITUTION:The driving shaft 31 of the peeling device is reciprocatively moved along the axis in parallel with the photosensitive drum 1 and the peeling pawl 20 and the paper guide 30 are moved along the photosensitive drum 1 within a specified range. Therefore, the rigidity of the supporting means of the paper guide 30 is enhanced and the vibration of the separation pawl 20 is prevented from being transmitted to the paper guide 30 even when the vibration, etc., is caused in the separation pawl 20. Then, a space between the paper guide 30 and the photosensitive drum 1 is not changed and the pressing state of the separation pawl 20 to the photosensitive drum 1 is not varied. Thus, the moving action of the paper guide 30 and the separation pawl 20 is accurately performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an image forming apparatus using an electrostatic transfer process such as an electrophotographic copying machine, a printer, etc.
The present invention relates to a paper separation device for separating paper onto which a toner image has been transferred from an image carrier such as a photosensitive drum.

(Prior Art) In an image forming apparatus such as an electrophotographic copying machine, a photoconductive layer provided on the surface of a photoreceptor drum serving as an image carrier is irradiated with light from an image reading device to create a static image. After forming an electrostatic latent image, the static latent image is visualized as one henna image by supplying toner from a developing device, and each henna image is transferred to paper or other paper. It is supposed to be done.

After the transfer process, the C paper is peeled off from the image holder and sent to a fixing device via a conveyance device, where heat and pressure are applied to melt the doves and fix them to the paper. You can get a copy.

In the conventional image forming apparatus described above, when the toner image formed on the surface of the image carrier is transferred to paper, the electric charge of the toner image is neutralized by electric discharge such as transfer rotor. Then, an electrostatic transfer method is used to avoid the dirt adhering to the surface of the image holder from being transferred to the paper (
There is.

However, due to the discharge caused by the transfer "1"1~F],
Therefore, a phenomenon occurs in which the paper is electrostatically attached to the image bearing member, so that after the transfer of the toner image as described above, a discharge of opposite polarity to the transfer=]r]l-ron occurs. The sheet is peeled off using a 11-II al-ron, and a means for peeling the paper from the image carrier is used.

However, the paper peeling effect was good due to discharge from rollers 1 to 1 and 1q.
In many cases, the paper is not peeled off from the image carrier.
For this purpose, a separation claw is often used in combination with devices such as general copying machines.

Then, by using a combination of the peeling 111[]nl~ron and the separating claw, the surface of the image 1q holder (Sl
m L-, the paper is peeled off, and the paper peeled off from the image carrier is transported toward the fixing device.

As the above-mentioned separation claw, for example, the one shown in Japanese Patent Application Laid-Open No. 60476 is used. The separation claw shown in this conventional example is arranged so that the tip of the claw lightly contacts the surface of the photoreceptor drum of the image ID holder, and is moved along the surface of the photoreceptor drum in its axial direction. It is about to be moved. By constantly changing the contact position of the tip of the separation claw, it is possible to prevent any damage to the surface of the photoreceptor drum.

The paper peeling device shown in the conventional example has a structure as shown in FIG.
The holder 38 is supported so as to be movable along the
is wound around the pulley 71 of the motor 70, and movement is performed by means of subrings 33 and 33a provided on the guide shaft.

Further, a paper guide 30 is provided on the holder 38 so as to protrude in the 11n direction, and a -C separation claw 20 is supported with respect to the paper guide via a claw holding shaft 24. Then, by driving the motor 70, the boulder is moved via the pulley 71.71a, and the separation claw 20 is reciprocated in the axial direction of the photoreceptor drum, so that the tip of the separation claw The paper can be peeled off without changing the contact position of the paper.

In addition to moving the separation claw along the axial direction of the photoreceptor drum as described above, there is also a case in which the separation claw is arranged so as to be able to move toward and away from the photoreceptor drum to separate the paper. In some cases, the tips of the claws are brought into contact with the surface of the photoreceptor drum.

For example, in the conventional example shown in Japanese Unexamined Patent Publication No. 60-95/169, etc., in a5, the separation (claw is moved 1q. The photoreceptor drum is configured such that one female part is in contact with the photoreceptor drum.

Then, only when the paper is to be peeled off from the photoreceptor drum, the separation claw contacts the photoreceptor drum, and the position where the tip of the separation claw contacts is constantly changed, so that the tip of the separation claw comes into contact with the photoreceptor drum. The surface of the photoreceptor drum may be damaged by
It is made possible to "prevent" 1.

The moving mechanism of the minute-1 claw of the device shown in the conventional example is configured as shown in FIG.
In the conventional example shown in the figure, one claw 20 is attached to the claw holding shaft 24 (=JU, and a cam 41 is attached to the end of the claw holding shaft 24).
A claw moving device 40 is arranged.

Further, the claw holding shaft 2/I is provided on the 7 lems 48.4.8 a on both sides of the '3A neck.
The cam 41, which is slidably supported and is in contact with the end of the shaft 24, is capable of reciprocating movement.

In the conventional cam-based separating claw movement mechanism configured as described above, each time a sheet is separated from a photoreceptor drum, a motor rotates the cam at a certain angle, thereby moving the shaft 24 at a certain interval. (-) It is made possible to move.

Further, an example in which a means for moving the separating claw toward and away from the photosensitive drum is provided is disclosed in, for example, Japanese Patent Application Laid-Open No. 58106581. In this kind of conventional device, a means for swinging the separation claw as shown in FIG. 17 is often used.

In the separation claw swinging mechanism shown in FIG. 17,
The separation claw 20 is supported by the claw holder @24, and the claw holding shaft is mounted on the main body frame (provided at the front end of the bracket T-60! The separation claw 20 is in a swingable state.

Further, a protruding member 22 is provided at the rear of the separating claw 20, and a driving means for pushing the rear member 22 upwardly is provided. This driving means consists of a link 52 connected to the 7-m 51 of the solenoid 50, a pawl swinging arm 53 connected to the link 52, etc.
The claw swing arm 1853 is composed of a substantially V-shaped member, and the tip of one arm member is supported by +11+57, and a tip pin 5' is attached to the tip of the other arm member.
l (!-setting) C is there.

Then, the claw swinging arm 5 is operated by the solenoid 50.
3, the tip pin 5/I is moved up and down, and by pushing up the rear part 22 of the separation claw 20, the tip @21 of the -1 claw is separated from the photoreceptor drum 1. 1 (Problems that the invention attempts to solve) However, when using the above-mentioned conventional paper stripping device, for example, the mechanism shown in FIG. Since the paper guide 30 is moved together along the guide shaft, it is difficult to accurately position the paper guide with respect to the guide shaft.
The state of contact of the tip of the claw with the photoreceptor drum changes. Therefore, if the tip of the nail is strongly pressed Ff, there is a problem that it may scratch the surface of the photoreceptor drum.

Furthermore, as mentioned above, if the separating claw and the paper guide are provided so that they move toward each other, the sliding resistance between the paper and the paper when it is peeled off from the photoreceptor drum will be reduced. As a result, the separation claw 20 vibrates, and the vibration tends to cause an inconvenient situation, such as changing the distance between the paper guide and the photosensitive drum.

When the paper guide vibrates, a change occurs in the pressing force of the tip of the separation claw against the photoreceptor drum, causing scratches on the surface of the photoreceptor drum, and making it difficult to achieve good peeling performance. Problems such as disappearing may occur.

In addition, as shown in FIG. 16, when the claw holding shaft provided with the separating claw is moved back and forth against the cam, the end of the claw holding shaft is pressed against the cam. When the spring exerts a suppressing action on the claw holding shaft, the amount of compression of the spring changes. Therefore, when rotating the cam, the pressure [J] of the pawl holding shaft changes, so that the negative force of the motor that drives the cam changes. 1? There are problems such as large fluctuations in +.

Furthermore, in the one-claw drive device of the mechanism described above, in order to properly move the separating claw, a component that controls the ability of the cam drive source to exceed the maximum load is required. This increases the size of the claw moving device and increases the manufacturing cost of the device.

Since the swinging mechanism of the separating claw shown in FIG. 17 is constructed separately from the means for moving the separating claw, it is necessary to provide two drive means for the separating claw. , there are problems such as the configuration of the drive mechanism becoming complicated.

In addition, a swing mechanism with one separation claw and a lateral movement mechanism, etc.
If the paper guide and the minute 111 claw are constructed so that they can be linked together, the direction and amount of movement of the paper guide and the minute 111 claw must be set to be the same, so that the movement functions of both of them must be set the same. There are problems such as not being able to do the work in advance.

In addition to the above-mentioned problems, in the conventional paper peeling device C1, in order to fix the separating claw to the guide shaft, the shape of the shaft hole of the separating claw is designed to be easy to attach and detach. Measures such as doing this are used.

However, depending on the type of guide shaft,
Changing the shape of the shaft hole of the separating claw not only affects the manufacturing cost of each separating claw, but also, in the case of a device that uses multiple separating claws, it is necessary to change the shape of the shaft hole of each separating claw. Problems arise, such as the need for additional work and time-consuming maintenance.

(January of the invention) The present invention solves the above-mentioned drawbacks of the conventionally used devices, and it
It is possible to swing the I11 claw and simplify the drive mechanism for moving the separation claw and paper guide.
It is an object of the present invention to provide a device that allows each part of the shrine to operate accurately.

(Means and operations for solving the problems) The paper peeling device of the present invention transfers a [-toner image formed on the surface of an image carrier to a sheet of paper by electric discharge such as [1] to a transfer roller 1, The present invention relates to a peeling device configured to peel the paper onto which the toner image and the like have been transferred from the image carrier and transport it to the next process.

In the paper peeling device of the present invention, the Moeki peeling device is composed of a peeling claw whose tip part contacts the surface of the photoreceptor drum, and a paper guide provided separately from the peeling claw,
The peeling device is configured to reciprocate in parallel to the axial direction of the photoreceptor drum, and the peeling device is fixed to the driving shirt 1 so that the shaft is parallel to the photoreceptor drum. By reciprocating along the support, the peeling claw and the paper guide can be moved within a predetermined range along the photosensitive drum.

Further, in the paper peeling device of the present invention, nFf recording m
The peeling claw of the Sobo is set so as to be movable in the axial direction along the surface of the photoreceptor drum, and a balance shaft is arranged relative to the cam device that drives the claw, and the balance shaft drives the claw. Si1
Installed at a position 180° out of phase with respect to 7 no 1~,
The cam device can be configured to prevent variations in load when rotating the cam device.

Furthermore, in the apparatus of the present invention, in A3, the peeling device is provided with a C peeling claw in which the tip of the claw can be brought into contact with the surface of the photoreceptor drum, and a paper guide provided separately from the peeling claw. The paper guide is configured to be moved backward in parallel to the axial direction of the photosensitive drum, and the swinging operation of the peeling claw of the peeling device and the reciprocating movement of the peeling device are It is possible to perform this by a single driving means, and to perform the swinging operation of the peeling claw and the movement of the paper guide independently. .

Further, in the paper peeling device of the present invention, the peeling device is constituted by a peeling claw provided with a tip of the claw capable of contacting and separating from the surface of the photoreceptor drum and movable in parallel to the axial direction of the photoreceptor drum, The peeling claws 1771 to 1771 are supported on the main body frame by a pivot block, and the 1111 support block is removed by removing the block holding part installed on the main body frame.
In addition, the /l-1 hook can be configured to be detachable from the holding portion.

In addition, in the paper separating device of the present invention, in addition to using each of the above-mentioned mechanisms individually, various technical means are used in combination to ensure the movement and swing of the separating claw and the paper guide. This makes it possible to perform the following operations, simplify the configuration of the device, and so on.

Since the paper separating device of the present invention has the above-described structure, the contact position of the minute 1111 claw with respect to the photoreceptor drum is changed, and the separating claw is moved from the photoreceptor only when peeling the paper. Since it is possible to set any mode of operation such as contacting the drum, it is possible to shorten the period between l+ and 'i which suppresses the photoreceptor drum.

As described above, by setting the location where the separation claw contacts the photoreceptor drum and the distance between ff and f, the separation claw is attached to the photoreceptor drum by 1+11/J-.
It is possible to reduce problems such as scratches caused by scratches, and it is possible to remove copies in good condition.

(Example) The configuration of the paper peeling 111[f device of the present invention will be described according to the illustrated example.

In the embodiment shown in FIG. 1, like the conventional example shown in FIG. This shows the case of a device configured as follows.

In the embodiment shown in FIG. On the other hand, a separate paper guide 19 (paper guide 30 to be pulled) is provided to be guided.

The paper guide 30 is configured such that the fixing member 34 provided on the holding arm 32 is held against the guide Qql+ 31, so that 1;
A protruding portion 36 of the bracket 1 is slid into a slit 36 formed in the bracket 1 to guide the 1-1° return movement of the paper guide.

Then, the guide 1ll131 is the photoconductor Drano\1.
By being moved parallel to the axis of the paper blade 3
When 0.30a is moved, the separation claw 2o located between the two paper guides is reciprocated with respect to the photosensitive drum 1.

Further, in the separation claw 2o, the claw holding shaft 1111124 is supported at both ends by bearings 37.37a provided at the tips of the plugs 1 to 35 on the photosensitive drum side. On the other hand, it is not installed so that it can slide,
The separation claw 2o can be moved along the claw holding axis.

Therefore, the minute 1i1+ claw and paper guide of the present invention,
As mentioned above, by configuring the paper guide to avoid movement via the guide shaft, the rigidity of the support means for the paper guide can be increased. The vibration of the separating claw is transmitted to the id.

Even if the temperature separation claw vibrates when the paper is peeled, the distance between the paper blade and the photosensitive drum will not change, and the state of suppression of the photosensitive drum by the claw will not change. do not have.

(Embodiment 2) The embodiment of the present invention shown in FIG. 2 does not show a case where only the separating claw 20 is moved along the photosensitive drum.
It attempts to demonstrate the shortcomings of the conventional device shown in FIG. In the embodiment shown in FIG. 2, a plurality of minute-1 claws 20, 20...
/l, so that reciprocating movement can be performed with the separating claws simultaneously in contact with the surface of the photosensitive drum.

In the embodiment shown in FIG. 2, in the same manner as in FIG. It consists of Ic and rotates the cam 4'1 provided integrally with the gear/1.4C. Furthermore, when the claw holding shaft 24 that supports the separation claw 20 is arranged with respect to the cam 41,
The claw holding 1lIll12/'l and the 180 part phase were changed and the balance 1lt45 was changed to 93 of the respective issue 1.
One portion is pressed against the cam surface 42.

A spring 46, /16a is arranged between each of the two 111 and the bearing /19a, and when the two axes of the tongue are moved alternately, the two springs alternately extend and contract. Repeat Tsu゛J, sea urchin.

Therefore, when the separation claw moving mechanism is configured as described above, the claw holding shaft 24 moves in response to the rotation of the cam.
The separating claw is fixed on the surface of the photoreceptor drum and moved back and forth. When the separating claw is moved, a balance ill/1.
5 serves as a lever that is reciprocated in the opposite direction to the claw holding tlNl+.

Then, as the J is rotated, the springs installed on the two parallel shafts 24 and 45 expand and contract in the opposite direction and in the one direction, respectively. 1, that is, when the spring on the horn is compressed, the other spring is stretched.
When the claw I^J,'IQll 24 is moved to the right side of the figure, it compresses the spring 46, but the spring 468 installed at the balance 1+lIA 5 is
It acts in a direction that cancels out the compressive force of the spring 46.

As described above, by arranging and covering the shaft with two springs in a symmetrical position with respect to the rotation center of the cam, it is possible to prevent fluctuations in the load on the cam drive system. As much as possible, even if a relatively small motor or the like is used, the action of moving the separating claw can be performed accurately without having to adjust the capacity of the drive device such as a motor to correspond to the maximum load. 11. Those who do so yell.

(Embodiment 3) The embodiment of the present invention shown in FIG. 3 is a device that allows the swinging operation of the separating claw 20 and the backward movement of the paper guide 11 to be performed by one driving means. The case is -C. The embodiment shown in FIG.
The purpose is to demonstrate the drawbacks of the conventional example shown in the figure.

In the embodiment shown in FIG. 3, the separation claw 20 is supported in a fixed position by a claw holding shaft 24, and the claw 20 is supported by a claw holding shaft 24 so that the claw can be swung in the evening and January. It is set up in Also, apart from the above-mentioned minute-1 claw 20, a paper guide 30 is movably provided via a holding arm 32.32a, and a spring 33.33a is arranged on the holding arm 32.32a. The holder 38 supporting the paper guide is biased toward the separating claw by these springs.

As means for swinging the separation claw 20, a solenoid 50 and a claw swinging arm 53 that is swung by the solenoid are disposed. As will be described later, it is also used as the second driving means for moving the paper guide.

The claw swinging arm 53 is configured in a substantially V shape and has a shape of d3.
A tip pin 54 is provided at the tip of the arm protruding toward one of the separation claws, and the tip pin 5/4 is connected to the separation claw 2.
It is configured to be engaged with the protrusion 22 at the rear of the 0.

In addition, the externally applied arm member is attached to the body frame by a shaft 57 at its central portion, and the tip of the arm member is an extension arm 55. A suppression arm 58 is provided that protrudes from the portion. Roughly speaking, a spring 56 is installed at a predetermined position J of the extension arm 55, and the spring 56 urges the pawl swinging arm 53 in the counterclockwise direction.

A link 52 is connected between the arm 51 of the solenoid 50 at λ1 to the pawl swinging arm 53 of the present invention constructed as described above, and the pawl is turned on and off by turning on and off the power to the solenoid 50. The swinging arm 53 is the shaft 57
oscillates around the center. Then, when the solenoid 50 is turned off and the bottle 54 is pushed up by the force of the spring 56, the separating claw 20 is swung in the clockwise direction with the lever 24 as the center, so that the tip of the claw is attached to the photoreceptor. One hour has passed since the drums.

In addition to this movement of the separation claw, in the embodiment of the present invention, when the claw swinging arm 53 is swung as described above, the pressing arm 58 provided on the extension arm 55
Tsukuda) It is swung around 57. Since the tip of the bottle 58 is in contact with the cam surface 39 provided on the side of the holder 38, the holder 38 is moved to the holding arm 32.32a by the swinging of the arm I8 mentioned above. In the embodiment shown in FIG. 3, the solenoid 5
0 and the spring 56, the claw swinging arm 53 is moved by one stroke, the movement of moving the claw 20 toward and away from the surface of the photoreceptor drum, and the paper guide 30.
The operation of moving the photoreceptor drum 11 backward along the axis of the photoreceptor drum can be performed at the same time.

Then, turn on the solenoid 50, and turn on the claw swinging arm 5.
3 in the direction 61 about the shaft 57, the pushing up of the separation claw 20 against the rear part is released, but the suppression arm 58 pushes against the cam surface 39, so the holder 38 is moved by the spring 33. It is assumed that it is moved to the right side of the figure against the pressing force of 33a.

Furthermore, when the solenoid is turned off, the claw swinging arm 53 is swung in the counterclockwise direction by the force of the spring 56.
The tip bin 57'l pushes the rear part 22 of the separating claw 20 and covers the tip of the claw so as to be spaced from the photosensitive drum, and the holder 38 that supports the paper guide 30 is moved by the spring 33. It is moved to the left side in the figure by the force of 33a and returns to its original position. .

In addition, in the above-described embodiment, the claw holding shaft 24 supporting the separation claw 20 is moved in the tkl+''j-j direction by a drive mechanism (not shown). In that case, the paper guide and the separation claw can be moved in conjunction with each other, or each member can be moved in the longitudinal direction of the surface of the photoreceptor drum 11 as desired. It is possible to cover it so that it can be moved with a soil board.

By configuring J as described above, in the embodiment shown in FIG. Therefore, these drive mechanisms can be simplified. Furthermore, the setting of the movement range of the holder that holds the paper guide can be easily changed by changing the shape of the cam surface provided on the holder.

Embodiment 4 In the embodiment of the present invention shown in FIGS. 4 and 5, the claw holding shaft 24 that supports the separating claw 20 can be easily removed from the brackets 1 to 00. An example of the case of J, sea urchin J is shown. In the illustrated example, in J3, there is a tab [1] at the tip of the photoreceptor driver
A lock holding portion +A62.62a is provided c) and d3, so that the shaft support block 61 is locked to the block holding member. .

Further, in the above-mentioned Brauns 1 to 60, branch members 63 and 63a are removed in accordance with the positions in which the separation claws are removed. It can be fixed in a predetermined position using means such as a stopper.

Then, as described above, by using the supporting member, the separation claws 20, 20a can be easily positioned and repositioned when the claw holding shaft is moved several times relative to the bracket 60. -ru.

In the above embodiment of the present invention, at a5, there is a support block 6161a for supporting the pawl holding shaft 24.
The 4 axes are slid and oscillated and held in a 1-way state.
The block holding member 62.6
Any fixing means can be provided for 2a.

If the separation claws are not removed from the retainers 1 to 60, simply pull out the shaft support block 61 downward in the figure relative to the block retainers Δ62 to release the engagement relationship between the two. 3. After that, when the shaft support block is pulled out from the claw holding shaft, the separating claw can be easily removed along the axis of the claw holding shaft.

Therefore, in this embodiment, the first separation claw is only provided with a shaft hole through which the claw holding shaft passes, and there is no need to provide any other shape of shaft locking means.

In other words, for example, it is not necessary to provide a compound-shaped glue-II engaging member as a means for attaching the claw holding shaft, as shown in Japanese Utility Model Application Publication No. 60184071. , the shape of one female claw can be simplified.

As shown above, fix the claw holder +111 that holds the separation claw together to the bracket. Support 1]
By positioning and fixing the nail on the block holding portion H, it is possible to easily remove the separation nail that is attached to the C1 photosensitive drum.

Furthermore, since the supporting member 63 for positioning the separating claw with respect to the retaining Braun 1-60 is simply screwed into the Braun 1, its installation (=j lJ position can be easily changed). (Example 5) In the paper peeling device 1 of the present invention, as described above, each of the separating claws, paper guides, etc. However, in order to combine the above mechanisms and achieve good peeling performance, it is necessary to refine the device as shown in Figure 6. You can.

The paper peeling device shown in FIG. 6 is shown in a perspective view from the back, so the holding bracket 6
0 is installed on the main body frame, and the pawl moving device and each means are supported by the holding Braun 1-60, respectively. The tip 21 of the pawl 20 is in rigid contact with the photoconductor drum 1. At the same time, the paper guide 30 and the photoconductor drum 1
It is fixed on the axis of the body and is made movable.

In the above embodiment, the claw holder 'l that holds the separation claw 20 is
! II2 /l is IIi+ that passes through the paper guide 30
It is supported in the hole, and is also supported in the tip of the retaining Brown 1-60 (J) or in the sacral branch 66.

Further, the paper guide 30 has a guide shaft 31 a at its base.
When the guide shaft 31Fl is moved in the axial direction by the cam 41, the paper guide 3
0 is moved back and forth two steps along the axis of the photoreceptor l\1. Following the movement of the paper guide, in this embodiment, the separation claw 20 also reciprocates along the axis of the photosensitive drum 1.

In order to cause the separating claw and the paper guide to swing and move back and forth, the paper pricking device shown in FIG. 6 is provided with one solenoid 50. As shown in the figure, a spring 51a is provided to prevent the arm 551 from reciprocating depending on whether the solenoid is turned on or off.
3. A link 52 is connected to the tip of the solenoid arm 51, and the other end of the link is connected to a rod 94. At both ends of this rod 94, 1 liter
f Connect the V-shaped swinging arm 96, and
96 has two arm portions +A 96 a and 96 C formed in a 1t8V shape.

Of these two arm members, the arm 96a is provided with a pressing pin 96b at its tip (13).
6b is engaged with the rear protrusion 22 of the separation claw 20, and the corresponding portion 1
The ilIl pawl 20 is made to be able to swing relative to the I-bit 2/l.

Moreover, the end of the other arm part +496c is attached to the fixed part 9
The cam 41 installed at the end of the cam shaft 95 is rotated by the swinging of the swing arm 96, avoiding rotation of the cam shaft 95. .

The cam 711 is provided with a one-way clutch 90 consisting of a gear 91 and a leaf spring 92, and the one-way clutch 90 is configured to be able to rotate in the same direction only in one direction with respect to the cam shaft 95. can be set up. In addition, the clutch 90 has teeth formed on the surface of the gear A791, and when the gear is rotated in another direction, the tip of the leaf spring 92 is caught by the teeth of the gear Al, and the gear A791 is rotated in the other direction. It is possible to regulate the rotation of.

Note that the clutch 90 is attached to the holding bracket 60 = 11
．． 1 supported by the bragut 1-93, and the cam 41 has a non-nominal surface 7' as shown in FIG.
I2 is set up, and the force is 1195 to the east.
Two axes 3Ia, /
I5 is provided so that it can be pressed.

The other of the two shafts mentioned above (1-'), the guide shaft 31'a
As described above, the end portion of the holding member of the paper guide 30 is fixedly held, and when the guide q11 is moved by the cam, the paper guide 30 is aligned with the axis of the photosensitive drum. It acts to avoid movement.

Further, the balance shaft 45 is arranged to balance the load when the cam 41 rotates, similar to the balance shaft shown in FIG. A spring/I6.46a is disposed at each of the shafts, and acts to press the respective shaft portion toward the cam. The back of each shaft, the camshaft 95, the guide shaft 31a, etc. are formed on a holding bracket or
The guide shaft is supported by the bearing member 98, and a guide shaft is provided so as to be slidable in the axial direction with respect to the bearing member 98.

In the paper peeling device of the present invention configured as described above, by turning on and Δfree the solenoid 50,
The swinging arm 96 rotates the cam @95, and at the same time swings the separating claw 2o with respect to the claw holding shaft to move the separation claw 2o toward and away from the photoreceptor drum.

Further, due to the swinging of the swinging arm 96 described above, the end of the arm portion)tt96c is fixed.[When the camshaft 95 is rotated in the counterclockwise direction, the cam/41 is rotated in that direction. However, when +111 is rotated in the opposite direction, the clutch between the shaft 95 and the cam slips, and the tip of the leaf spring is locked to the gear provided on the outside of gear A7, causing the cam to rotate. This will stop the rotation in the opposite direction.

Therefore, in the paper separating device of the present invention, each time the solenoid 50 is activated, the separation claw is brought into contact with and separated from the photoreceptor drum, and the paper guide is integrated with the separation claw so as to be aligned with the axis of the photoreceptor drum 1. It can be cured and moved.

As mentioned above, the claw moving device and the paper guide driving member are operated by one solenoid.
The drive mechanism can be simplified, and the space required for installation in the image forming apparatus can be reduced.

In addition, in the above embodiment, the am part for the separation claw +A9
The pin 96b provided at the tip of 6a can be engaged with the rear protrusion 22 even when the separation claw 20 is moved laterally.
The swinging motion with respect to the distribution claw can be performed at any position of the separation claw.

'', In the embodiment of the present invention, i3 has a separating claw 2.
As shown in FIG. 4, the claw holding shaft 24 that supports 0 can be attached to a bearing member via a shaft support block, and other changes in the holding means can be made as desired. I can do it.

(Embodiment 6) The embodiment of the present invention shown in FIGS. 7 to 9 is a device that can move laterally on the surface of a photoreceptor drum by interlocking the separating claw 20 and the paper guide 30. , a mechanism for driving the paper peeling device is explained.

3/I For example, in the example shown in FIG. 7, in d3, the minute V claw 20
The paper guide 30 is provided so as to be movable via the claw holding shaft 2/'1, and the shaft support 73 is connected to the end of the claw holding shaft 2/'l. Then, the shaft support member 73 is attached to the drive bells 1 to 72 (the belt 72 is driven by the Saturday and evening drive 70 via the pulley 71).

d3, the motor 70 uses a DC motor to perform forward and reverse rotation. -C Performs back-and-forth movement and paper peeling operations.

In the embodiment shown in FIG. 8, the claw holding shaft 2
A moving part 77 is installed at the end of 4.

Then, by avoiding rotating the DC-shield starter 70 in the iE reverse direction, the screw 76 is driven forward and backward via the bevel gear A775.75a, and the claw holding 111 is driven via the moving member 77.
11 is moved backwards, and the separating claw and the paper guide can be moved along the surface of the photosensitive drum. .

Roughly speaking, in the example shown in FIG. 9, as shown in FIG. 8, a gear mechanism is installed in the DC rotor 70. As described above, in the paper peeling device #1 of the present invention, the drive means for the separating claw and the paper guide are configured to be directly driven by the motor. It can be constructed as something. Then, each time a command to create a copy is given to a copying machine, etc., or by applying a constant driving pulse to a part of the machine in an arbitrary mode, the tip of the separating claw is By changing the position in contact with the photosensitive drum, it is possible to prevent scratches or the like from being formed on the photosensitive drum due to the separation claw.

In addition, the mote t5 of the movement of the separation claw as described in rIir.
This can be performed at any timing, and some of these drives can be used as driving means for the separating claws and paper guides in the above-mentioned apparatus.

G (Embodiment 7) The embodiments of the present invention shown in FIGS. 10 to 12a are not related to the paper peeling device described above, but are suitable for peeling paper from a photoreceptor drum. , b shows the means used to prevent the paper from being adhered to the photosensitive drum via 1 to 2, making it difficult to peel it off.

For example, in a target 4J copying machine, if J3 () is present at the rear end of the image area of the photosensitive drum 1, as shown in FIG. ] After transferring the toner image to the paper, there is a lot of toner (
Sometimes I wear one. In this example, a transfer 2L:1 tron 7 is provided at the image transfer portion of the photosensitive drum 1, and a lower guide plate 1 is provided on the paper transport path for guiding the paper P.
0 transfer guide 11, etc. 3゜and-C1 As mentioned above, there is a large amount of
When the paper P is introduced into the fixing device in a state in which the paper P is attached, as shown in FIG. Then, the toners 1 to 1 are melted and fixed on the paper 1].

However, if a large amount of toner is deposited on the rear part of the paper P, some of the toner will be absorbed from the first part of the paper, as shown in Figure (b). It may overflow and be transferred to the pressure roller 82.

As mentioned above, the sea urchin, which is still attached to the sea urchin and the sea urchin 82, is rotated by the rotation of the sea urchin, the heating eye, and the sea urchin shown in the same figure (C) IJ Ishik e). Therefore, when the paper is moved and the fixing operation is applied to the next paper, some problems arise in that it stains the back side of the paper and contaminates the back side of the bee.

In addition to forming a toner image on the trailing edge of the paper, even when forming a dark toner image on the leading edge of the paper, the leading edge of the paper is brought into close contact with the photoreceptor drum by the 1-toner. 1, the peeling operation by a device such as a separation claw may occur normally and the paper is not covered. In order to prevent adhesion, there are 4F double layers inside the membrane.
In the device of -G, it is formed on the photoreceptor drum and 3ε
3. At the leading edge of the image, a portion of a fixed length where no image is formed is formed, and the leading edge of the paper can be easily peeled off.

However, in conventional apparatuses, the leading edge of the image area formed on the photoreceptor drum forms a part to which the tree does not adhere, but the part corresponding to the trailing edge of the paper forms a part corresponding to the size of the paper. Currently, there is no setting of an area where numbers 1 to 3 do not fall.

Therefore, in the image forming apparatus of the present invention, in the image forming apparatus as shown in FIG.
By using a part of the toner image forming means disposed around the toner image forming means, it is possible to form a non-printing area at the rear end of the image area.

First, as shown in FIG. 10, the device to which this embodiment is applied includes a static elimination lamp 2 around the photoreceptor 1ζ ram 1.
, charging 2] [11 to Ron 3, exposure section 4, static elimination lamp 5,
developing device 6, transfer] rotron 7, separation claw 20, and
The cleaning device's 48 tongues are arranged in the order in which toner images are formed and arranged in -C.

3, and the surface of the photoreceptor drum 1 is charged with 2" and 11 to [1
Discharge is performed by the 3-channel, and it is charged in a negative manner.'t! , I: Later, an electrostatic latent image is formed by irradiating image light from the exposure unit 4, and toner images 1 to 1 are supplied from the developing device 〇 to the electrostatic latent image to form a toner image. The image is visualized and transferred onto the paper P by the transfer unit 101 through the electric discharge.

Further, the paper P is sent out from a paper feeder (not shown), is guided by the F guide plate 10 of the paper conveyance path, and is guided by the transfer guide 11, reaches the transfer section, and is guided by the separation claw 20. It is peeled off and conveyed toward the -C fixing device.

In the image forming apparatus having the above-mentioned configuration, as shown in FIG. This is to prevent a large number of 1 to Boo (+1) from landing on the rear end.

In this embodiment of the present invention, the point of action of the static elimination lamp 2 is
,') Set the light position i as ii, the point of action of the rotary a l to d as d, the both ends of the irradiation area by the static elimination lamp 5 as A and c, respectively, and set the position at a predetermined position on the paper transport path. The points of action of A-1 of CENTRY-12 set in are set as e and f, respectively.

In the apparatus of the present invention, a lens 12 provided on the paper conveyance path detects the trailing edge of the paper, and the detected information is input to a CP LJ provided in a control device for eight image forming apparatuses. This information is input as shown in Figure 12)[-1-
Steps Δ to B are performed in the order shown in chip pt, and the signal is input to the timer of scavenger block C and is output to signal processor 1!11 of the drive system device in step D. . .

Then, at the time and timing set in step D, the static elimination lamp 5 is turned on to irradiate the surface of the photoreceptor drum to perform processing to prevent the formation of an image at the rear of the image area. 4.

In step J3 of the signal processing operation shown in flowchart 1 of FIG. 12, the following interval control is performed with respect to FIG. However, during time processing, the distance between the end f of the Renly arm 13/11 and the transfer point hd, and the swing of the arm ``1''
"e-f, which distance between the static elimination lamps a and C to the exposure point 1
It is used depending on the conditions such as 1-stroke image formation, 8-head control speed, etc.

(d f −ad + a b ten b c ) / z
(a) Howl.

Here, d'f - a d = ag.

υ' In other words, according to the above formula (Fl), when the trailing edge of the paper is at the position of the sensor 4 no arm f, from points 1 to g on the surface of the photoreceptor drum corresponding to that position,
The light that shines on the static elimination lamp 5j! J1 Take the time it takes for the photosensitive drum to rotate to point C.

Therefore, J shown in the above calculation formula (a): sea urchin,
After the trailing edge of the paper passes the sensor arm position,
After the period set by the above formula (a) has elapsed, the C1 static elimination lamp 55 is turned on to prevent the formation of a toner image at the rear end of the image area.
In addition, the non-image area to be formed on the paper can be carefully set within the static elimination interval bh, and the range is as follows:
(It is possible to set it as desired depending on the type of bag to be placed.1) It should be noted that the above-mentioned device of the present invention has a combination of detection by the sensor and lighting of the static elimination lamp. The relationship is calculated as shown in timing 1 to 3 in FIG. After the elapse of time, the static elimination lamp is turned on so that a non-image area can be set at the rear end of the image area of the photoreceptor drum.

41 Each of the above-mentioned mechanisms of the present invention uses a dry method, such as an electrophotographic copying machine or a Rayleigh printer, to form one to one image on the surface of a photoreceptor drum, and transfer the toner image to the surface of the photoreceptor drum. It is possible to apply it to a general image forming apparatus that transfers images onto paper, and it is possible to use any combination of the mechanisms shown in each embodiment, or to replace one mechanism with a conventional image forming apparatus. It is possible for customers to incorporate it into

(Effects of the Invention) Since the paper separating device of the present invention has the above-described configuration/13, it is possible to control the swinging and other movement of the separating claw,
3. The movement of the paper guide can be controlled easily and reliably. 3. The paper guide, which has been peeled off from the photoreceptor drum, etc., can be guided in good condition. It can be done.

In addition, it is possible to avoid changing the contact position of the N1 claw with respect to the photoreceptor drum, and to allow the separation claw to contact the photoreceptor drum only on the platform where the paper is peeled and pHed. , it is possible to shorten the time it takes to press a photoreceptor drum by one hour. .

Furthermore, as mentioned above, when setting the location where the minute-1 claw contacts the photoreceptor drum, such as the intercostal space, there may be scratches caused by the separation claw being pressed against the photoreceptor drum. problems can be reduced and copies in good condition can be obtained.

[Brief explanation of drawings]

Figure 1 shows the paper peeling 1ll11 of the present invention from the back side.
This is a perspective view, FIG. 2 is a plan view of the separating claw moving device, FIG. 3 is a perspective view of another embodiment of the present invention, and FIG. 4 is a perspective view of the separating claw fixing means from the back side. 5 is a side view thereof, FIG. 6 is a perspective view of the paper separation device incorporating the mechanisms of the present invention as seen from the back, and FIGS. 7 to 9 are views of the separating claws. FIG. 10 is an explanatory diagram of an embodiment of the driving means, FIG. 10 is an explanatory diagram of a typical image forming apparatus, and FIG. An explanatory diagram of means for forming an image portion, FIG. 12 is a flowchart of operations 1 to 1 for setting an unimaged area
Figure 12a shows the relationship between the operation of the sensor and the operation of the static elimination lamp. The figure shows the effect of the redundant 1 to Boo arriving at f1, and Figures (a) to 1e) do not show the state of transfer of 1 to 1 to the fixing device in order. Explanatory diagram,
Figures 15 to 17 respectively show the conventional separating claw moving mechanism and the minute 11! +Explanatory diagram C showing the configuration of the claw swing mechanism
be. Notes in the figure 1...Photosensitive drum, 20...Separation claw, 24...Claw holding shaft, 30...Paper guide, 32... ...Holding arm, 40...
Claw moving device, 41...cam, 43...
Motor, 'l'...Balance II! 11, ε
jO...Solenoid, 53...Claw swinging arm, 60...To holding bracket 1, 61...
・・・・il'llll "2<bu[]tsuku, 62...
... block holding member, 73 ... shaft support member,
77...Moving member, 90...One-way clutch, 93...Holding bracket 1-. 95...
...Camshaft, 96...Arm. Male j /IO 9■-

Claims (4)

[Claims] (1) The toner image formed on the surface of the image carrier is transferred to paper by electric discharge from a transfer corotron, etc., and the paper on which the toner image has been transferred is peeled off from the image carrier and transported to the next process. In the peeling device configured to The device is configured to reciprocate in parallel to the axial direction of the photoreceptor drum, and the members constituting the peeling device are fixed to a drive shaft, and the shaft moves along an axis parallel to the photoreceptor drum. 1. A paper peeling device characterized in that the paper peeling device is configured to be able to move a peeling claw and a paper guide within a predetermined range along a photosensitive drum by reciprocating the paper peeling device. (2) The toner image formed on the surface of the image carrier is transferred to paper by electric discharge from a transfer corotron, etc., and the paper to which the toner image has been transferred is peeled off from the image carrier and transported to the next process. In the peeling device configured to do so, the peeling claw of the peeling device is provided so as to be movable in the axial direction along the surface of the photoreceptor drum, and a balance shaft is arranged with respect to a cam device that drives the claw. and the balance shaft is provided at a position 180° out of phase with respect to the drive shaft of the claw,
A paper peeling device characterized in that the paper peeling device is configured to prevent load fluctuations when the cam device rotates. (3) The toner image formed on the surface of the image carrier is transferred to paper by electric discharge from a transfer corotron, etc., and the paper to which the toner image has been transferred is peeled off from the image carrier and transported to the next process. In the peeling device configured to The paper guide is configured to reciprocate in parallel to the axial direction of the photosensitive drum, and the swinging operation of the peeling claw of the peeling device and the reciprocating movement of the peeling device are performed by a single driving means. A paper peeling device characterized in that the swinging operation of the peeling claw and the movement of the paper guide can be performed independently of each other. (4) The toner image formed on the surface of the image carrier is transferred to paper by electric discharge from a transfer corotron, etc., and the paper to which the toner image has been transferred is peeled off from the image carrier and transported to the next process. In a peeling device configured to The shaft of the peeling claw is supported on the main body frame by a pivot block, the pivot block is attached by a block holding member provided on the main body frame, and the block is configured to be detachable from the holding member. Characteristic paper peeling device.