JPH11231711A - Paper peeling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper peeling device capable of surely preventing, by a simple structure, a paper peeling claw-member from being pressed hard onto the peripheral face of a rotary body due to, for example, a paper jam and damaging the periphery as a result, and, further, capable of always maintaining a state of the contact of the peeling claw-member with the rotary body. SOLUTION: The device is provided with a turn restricting device 30 equipped with a restricting member 33 (situated in a restricting position L), which supports and fixes the state of the contact of the peeling claw 20 with the peripheral face of the rotary body by a pressing member 26 and prevents it from turning farther in the contact direction A from the state of the contact. Here, the restricting member 33 is made movable to a restriction releasing position as well from the restricting position L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus having a rotating body which requires peeling of a sheet from a rotating peripheral surface (for example, a copying machine equipped with a fixing roll, a pair of paper feeding rolls, a printer, Facsimile machines, image forming apparatuses such as multifunction machines, etc., etc.), and in particular, the paper peeling claw member gets into the peripheral surface of the rotating body and damages the peripheral surface due to paper jam or the like. The present invention relates to a paper peeling device capable of preventing the paper peeling.

[0002]

2. Description of the Related Art This type of paper peeling device is used, for example, as a fixing device in an image forming apparatus such as a copying machine and a printer using an electrophotographic system. FIG. 7 shows a main part of a fixing device provided with the sheet peeling device. In FIG. 7, reference numeral 100 denotes a heating roll which rotates in the direction of an arrow.
Reference numeral 01 denotes a pressure roll that is rotated by being pressed against the heating roll 100, 102 denotes an introduction-side paper guide that guides a sheet P introduced into a nip portion (pressure contact portion) N of the heating roll 100 and the pressure roll 101, and 103 denotes a fixing. This is a discharge-side paper guide that guides the paper P discharged from the nip portion N later.

The paper peeling device is provided at least for the heating roll 100 of the illustrated fixing device, and rotates around the support shaft 104 near the paper peeling area E of the heating roll 100. A paper peeling claw member 105 is provided. Further, the paper peeling claw member 105 is biased by a biasing member (not shown) to rotate in the direction of arrow A by a biasing member (not shown), so that the paper peeling claw member 105 gently hits the peripheral surface of the heating roll 100. It is kept in contact.

In a fixing device equipped with such a sheet peeling device, a sheet P carrying a toner image formed and transferred by an image forming unit of an image forming apparatus is heated by a heating roll 100 and a pressure roll. The toner image is discharged from the nip N after being introduced into the nip N of 101 and the toner image is fixed. At this time, if the paper P is still attached to the peripheral surface of the heating roll 100, Heating roll 100
Is separated from the roll peripheral surface by the claw portion 105a of the paper peeling claw member which comes into contact with the peripheral surface of the roll.

[0005]

However, in such a paper peeling apparatus, when a paper jam occurs on the downstream side of the nip portion N, the paper peeling claw member 105 is moved as shown by a two-dot chain line in FIG. Paper P complicatedly deformed by paper jam
And pressed against the heating roll 100 side,
As a result, there occurs a problem that the claw portion 105a enters the peripheral surface of the heating roll 100 and damages the peripheral surface.

[0006] The damage of the heating roll 100 due to the biting of the claw portion 105a may be caused by an external force in a direction in which the paper peeling claw member 105 is erroneously pressed against the heating roll 100 during the work of removing the jammed paper. It also occurred by applying. In addition, when an elastic surface layer such as silicon rubber is formed on the peripheral surface of the heating roll 100, there is a tendency that the claw portion 105a is easily damaged by the above-described biting, and when the damage is severe, This caused a situation in which the heating roll had to be replaced.

Incidentally, in order to solve such a problem, for example, Japanese Patent Application Laid-Open No. 63-58474 discloses that when an external force is applied to the fixing roll in a direction of strongly pressing the peeling claw in a paper jam or the like, the external force is used. A rotating member is provided for rotating and separating the peeling claw from the roll. The rotating member is supported in a state where the peeling claw is elastically urged in the contact direction, and the peeling claw is moved at a predetermined angle in the contact direction. The peeling device provided with the stopper for restricting the rotation is described above. Japanese Patent Application Laid-Open No. 8-272259 discloses that, when a paper jam occurs, a claw member is disposed perpendicularly to a sheet feeding direction along a slot-shaped receiving portion provided on a bearing member of a rotation support shaft. A paper peeling mechanism is shown in which the sheet is retracted in the direction and the movement at the time of the retraction is restricted by a stopper member so that the contact force of the claw member on the surface of the fixing roll is reduced or eliminated.

However, in any of the peeling devices, the contact of the peeling claw with the roll is ensured only by the urging force of the urging member or the like. (Contact pressure) depends on the dimensional accuracy and mounting accuracy of the claw member and the urging member, and has a problem of lack of stability.

Further, in the case of the former device, the stopper member is fixed to a fluctuating rotating member or the like and acts during rotation of the rotating member. When the paper is pressed so as to hit the claw portion of the claw member directly in the contact direction, the movement of the claw member in the contact direction by the stopper member is not restricted, and the claw portion is not restricted. Before leaving the roll, there is a possibility that the roll surface gets into the roll. On the other hand, in the case of the latter device, not only must a complicated mounting structure for moving the entire claw member upward around the support shaft be employed, but also such a retracting movement of the entire claw member is performed. For this reason, at the time of the evacuation, there is a possibility that the tip claw portion may be easily caught in the fixing roll before the claw member comes into contact with the stopper.

SUMMARY OF THE INVENTION It is an object of the present invention to more reliably prevent a paper peeling claw member from entering into a peripheral surface of a rotating body and damaging the peripheral surface due to the occurrence of paper jam or the like with a simple configuration. In addition, it is an object of the present invention to provide a sheet peeling device capable of always keeping the state of contact of the peeling claw member with the rotating body constant.

[0011]

According to a first aspect of the present invention, there is provided a sheet peeling apparatus which can achieve the above-mentioned object. A paper peeling claw member rotatably disposed around a support shaft in the vicinity of the peeling area, and applying a rotating force in a direction of lightly abutting the claw portion of the paper peeling claw member to the peripheral surface of the rotating body. A sheet peeling device having an urging member that contacts a part of the paper peeling claw member to support a state of contact of the claw member with the peripheral surface of the rotating body by the urging member and to make contact with the contact member. Between the restricting position that prevents further rotation of the claw member in the contact direction in the state, and the restriction release position that separates from contact with a part of the claw member and does not prevent the rotation. A rotation regulating device having a movable regulating member is provided.

According to such a paper peeling device, when the regulating member of the rotation regulating device is at the regulating position, the paper peeling claw member is controlled by the urging member by the regulating member abutting a part of the claw member. The state of contact with the peripheral surface of the rotating body is auxiliary supported and fixed, and further rotation from the contact state in the contact direction is prevented.
Thus, the (initial) contact state of the peeling claw member to the rotating body by the urging member is always kept constant. In addition, even when the claw member is pressed in the contact direction due to the occurrence of a paper jam or the like, the claw portion of the claw member is not pressed so as to fit into the peripheral surface of the rotating body.

On the other hand, since the rotation restricting device does not particularly prevent the rotation of the claw member in the direction opposite to the contact direction, the state of contact of the claw member with the peripheral surface of the rotating body fluctuates. (A gap may be formed between the claw portion and the peripheral surface of the rotating body).
However, in such a case, the regulation member is moved to the regulation release position. As a result, the claw member is returned to the (initial) state in which it comes into contact with the peripheral surface of the rotating body only by the urging member again. Then, by returning the restricting member to the restricting position, the pawl member returned to this state is again supported and fixed in the state of contact with the peripheral surface of the rotating body as described above, and unnecessary contact directions are provided. Is prevented from rotating.

In such a paper peeling device, the rotation restricting device may be, for example, a projection formed so as to project to the opposite side to the claw portion with the support shaft of the paper peeling claw member interposed therebetween. Part, a fixing member fixedly arranged at a distance from the support shaft on the opposite side to the rotating body, and enters the gap between the projection and the fixing member, intervenes and contacts the projection. A restricting member having a wedge shape having an inclined surface portion to be locked, a restricting position in which the restricting member is lowered and interposed in a gap between the protrusion and the fixing member, and a restricting release position in which the restricting member is raised from the gap and separated therefrom. And a moving device that moves between them (the invention according to claim 2).

Further, the rotation restricting device may be configured so as to temporarily move the restricting member to the restriction releasing position side after the sheet is separated from the rotating body and discharged. In this case, the discharge of the sheet may be configured to be detected by a sheet detecting unit that detects the sheet passing through the sheet discharge side of the rotating body. According to such a configuration, the state of contact of the sheet peeling claw member with the peripheral surface of the rotating body can be periodically returned to the initial state, and then kept constant.

Further, the rotation restricting device includes a measuring device for measuring the amount of change in the position of the sheet peeling claw member or the restricting member, and releases the restricting member in accordance with the measurement information from the measuring device. It is good to set it so that it may be moved to the position side once. According to such a configuration, it is possible to constantly monitor the state of contact of the sheet peeling claw member with the peripheral surface of the rotating body, return to the initial state when necessary, and then maintain the state again.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing a fixing device to which the paper peeling device of the present invention is applied. This fixing device is used for fixing a toner image formed in, for example, an electrophotographic copying machine, a printer, or the like to a sheet (paper, sheets, etc.) P, and is pressed vertically. The heating roll 1 and the pressure roll 2 are supported so as to rotate in a state of being rotated.

The heating roll 1 has a heating source such as a heater and a lamp disposed inside the roll, and an elastic surface layer is formed on the roll surface. This heating roll 1
Is heated to a predetermined heat fixing temperature by the heating source, and the temperature of the roll surface is maintained within a predetermined range by controlling the heating source based on detection information from the temperature detection sensor 3. Also, on the surface of the heating roll 1,
The roll type oil supply device 4 applies a release agent oil for preventing adhesion of toner and the like to the roll and improving the releasability of the paper from the roll. The pressure roll 2 is pressed against the heating roll 1 by an urging mechanism using a spring or the like, and forms a nip portion (pressure contact portion) N with the heating roll 1. In the drawing, reference numeral 5 denotes an introduction-side paper guide for guiding the paper P introduced into the nip portion N;
Is a discharge paper guide for guiding the paper P discharged from the nip N, and 7 is a discharge detection sensor for detecting that the rear end or the front end of the paper P discharged from the nip N has passed. is there.

Therefore, according to this fixing device, the paper P carrying the toner image transferred on the upstream side is introduced into the nip portion N between the heating roll 1 and the pressure roll 2 and passes therethrough. The toner image is thermally fixed on the paper. After the fixing is completed, the sheet P is sent out from the nip portion N, is separated from the heating roll 1 side, and is discharged to a subsequent process.

The heating roll 1 of this fixing device is provided with a paper peeling device 10 as shown in FIGS. 1 and 2 for the purpose of reliably peeling the paper P after fixing from the heating roll 1. The main part of the paper peeling device 10 is composed of a peeling claw 20 and a rotation restricting device 30.

The peeling claw 20 has a heating roll 1
And a projection 22 protruding in the shape of a pointed shape at the rear end thereof, and a support shaft disposed on the paper discharge side of the heating roll 1. 25 so as to be freely rotatable. The support shaft 25 is formed on a bracket 32 attached to a support frame 31 fixedly arranged at a distance from the heating roll 1, but is formed on a support material fixedly arranged separately from the support frame 31. There may be.

The peeling claw 20 has a direction in which the claw portion 21 comes into contact with the peripheral surface of the heating roll 1 by tension springs 26 each having one end attached to the protruding portion 22 and the other end attached to the support frame 31. A rotating power of (contact direction) A is applied, so that the claw portion 21 always lightly contacts the peripheral surface of the heating roll 1. Further, when the claw portion 21 comes into contact with the peripheral surface of the heating roll 1, a constant gap S is formed between the protrusion 22 and the support frame 31 facing the protrusion 22. It has become so. As a means for applying the turning power to the peeling claw 20, a coil spring or the like that is used by attaching a winding portion to the support shaft 25 may be used instead of the tension spring 26.

The rotation restricting device 30 includes such a peeling claw 2.
0 to regulate the predetermined rotation, and the protrusion 22 of the peeling claw 20, the support frame 31,
It is roughly composed of a regulating body 33 and a moving device 34.

The restricting body 33 is formed in a wedge shape having a tapered distal end. When the restricting body 33 enters the gap S between the protrusion 22 and the support frame 31 with its distal end facing downward. , At least the protrusion 2 of the peeling nail 20
2 has an inclined surface portion 33a which is locked by abutting on the second surface 2a. When the inclined surface portion 33a is locked by the protrusion 22, the gap S is interposed. The restricting body 33 is made of 6,6 nylon, polycarbonate (PC), polyethylene terephthalate (P).
ET) or the like, and is formed to have a predetermined weight.

The moving device 34 is for moving the restricting body 33 between a restricting position L and a restricting release position H, which will be described later, and includes an electromagnetic solenoid 35 having an arm 35a which moves forward and backward, and It is composed of a wire (a string, a soft wire, etc.) 36 connecting the arm 35 a of the electromagnetic solenoid 35 and the restricting body 33. In particular, in the moving device 34, the pulley 37 is fixedly disposed above the gap S between the protrusion 22 and the support frame 31, and the wire 36 having one end connected to the arm 35 a of the electromagnetic solenoid 35 is temporarily hooked on the pulley 37. After that, the regulating body 33 tied to the other end of the wire 36 is suspended from the pulley 37, and the regulating body 33 is moved (elevated or lowered) in the vertical direction C or D along the support frame 31. Like that.
That is, by moving the arm 35a of the electromagnetic solenoid 35 forward and backward, the regulating body 33 moves up and down along the support frame 31 (FIG. 1).
And FIG. 4).

In the moving device 34, the operation of the electromagnetic solenoid 35 is controlled by the control device 38. The control device 38 has an arithmetic processing function such as a microcomputer system, and is connected to the above-described sheet discharge detection sensor 7 and a position change detection sensor 39 for measuring the amount of change in the position of the regulating body 33 in the vertical direction. The electromagnetic solenoid 35 is operated in accordance with a preset control program based on each detection information from each of the sensors 7 and 39. In this example, during normal fixing, the regulating member 33 is lowered by advancing the arm 35a of the electromagnetic solenoid 35, and the passage of the sheet P discharged after fixing is detected by the sheet discharge detection sensor 7. The control body 33 is raised by retracting the arm 35a of the electromagnetic solenoid 35 only when the position change detection sensor 39 detects that the control body 33 has dropped by a predetermined amount (from the initial control position). Is set as follows.

As shown in FIG. 3, the position change detecting sensor 39 includes a light emitting portion 39a for emitting a plurality of light beams K and a light receiving portion 39 for receiving the light beam K emitted from the light emitting portion 39a.
b, the light emitting portion 39a and the light receiving portion 39b are arranged on both sides as reference portions of the regulating body 33, and the light path which is blocked by the reference portion of the regulating body 33 and does not enter the light receiving portion 39b side. The position of the regulating body 33 can be confirmed from information such as the number of _zeros and the position. Then, upper and lower regulating members 33 direction C, by varying the D, since the number and position of the light beam K ₀ that does not enter the light receiving portion 39b side changes, the amount of change of position of the regulating member 33 on the basis of this information It is to be measured.

Next, the operation of the paper separating apparatus 10 will be described.

First, the exfoliation claw 20 is constantly supplied with a rotational force in the contact direction C about the support shaft 25 as a pivot point by the tension spring 26. Thereby, the claw portion 21
Is always kept lightly in contact with the peripheral surface of the heating roll 1.

When the fixing is performed, the regulating body 33 of the rotation regulating device 30 is lowered in the direction of arrow D by the operation of the electromagnetic solenoid 35, and the tapered lower end portion is brought into the contact state as described above. In the state in which it has entered the gap S between the projection 22 of the peeling claw 20 and the support frame 31.
Specifically, when the lateral width of the portion of the regulating body 33 that has entered the gap S matches the width of the gap S, the inclined surface portion 33a is locked in contact with the projection 22, and beyond that, the descending direction D Is kept in a state where it does not fall. In this way, the regulating body 33 stops with the gap S interposed. The position of the regulating body 33 at this time is the “regulating position L”.

Accordingly, when the restricting body 33 is at the restricting position L, as shown by the solid line in FIG. The rotation in the direction of arrow A is completely prevented, particularly when the rotation is stopped in the direction of arrow A, and the rotation in the direction of arrow B is also prevented by the rotation force (biasing force) of the tension spring 26. For this reason, the claw portion 21 is moved further in the contact direction A.
And the contact direction A
Rotation in the opposite (retreat) direction B is also prevented.
That is, by the rotation regulation by the regulation body 33,
The peeling claw 20 is supported and fixed in a state where the tension spring 26 is in contact with the peripheral surface of the heating roll 1, and the contact direction A
Further pivoting of the motor is completely prevented.

As a result, the state in which the peeling claw 20 abuts on the peripheral surface of the heating roll 1 is kept constant. Is a peeling claw 20 (claw portion 2) which satisfactorily contacts the heating roll 1.
1) is surely peeled off. Moreover, even if an external force F is generated such that the peeling claw 20 presses against the peripheral surface of the heating roll 1 due to a paper jam or the like, the peeling claw 20 is kept in the contact direction A.
Therefore, the claw portion 21 is not strongly pressed against the peripheral surface of the heating roll 1 and does not damage the peripheral surface of the heating roll 1.

On the other hand, when the regulating body 33 is at the regulating position L,
When an external force that causes the peeling claw 20 to rotate in the retreating direction B is applied to the peeling claw 20, the rotation in the opposite direction B of the peeling claw 20 is not firmly regulated by the regulating body 33.
It may rotate. It is assumed that such an external force is generated when a paper jam occurs or when the paper is peeled by the peeling claw 20. Actually, when such an external force is applied to the peeling claw 20, as shown in FIG. 6, the peeling claw 20 momentarily rotates in the direction of arrow B, thereby causing the gap between the protrusion 22 of the peeling claw and the support frame 31 to move. the width of the S widens momentarily (down to the position L ₀ slightly lower than the regulating position L) of the expanded amount corresponding regulating body 33 is slightly lowered in the arrow B direction. As a result, a slight gap M occurs between the claw portion 21 of the peeling claw and the peripheral surface of the heating roll 1. If the fixing is continued in the state where the gap M exists, the sheet is not peeled off satisfactorily, and a paper jam is likely to occur.

Therefore, in the rotation restricting device 30, when the paper discharge detection sensor 7 detects the passage of the paper P (the rear end) safely discharged from the nip portion N after the fixing, the detected information becomes Based on the control device 38, the electromagnetic solenoid 3
5 is operated to raise the regulating body 33. At this time, the regulating body 33 rises so as to be separated from the gap S between the projection 22 of the claw member and the support frame 31 and is retracted to a position where the rotation of the claw member 20 is not prevented at all. The position of the regulating body 33 at this time is the “regulation release position H”.

When the restricting member 33 is at the restriction releasing position H, the rotation of the protrusion 22 of the peeling claw 20 is not prevented by the restricting member 33 as shown by a two-dot chain line in FIG. (Same as the contact direction A) and K direction (same as the B direction). As a result, the peeling claw 20 is rotated again in the contact direction A by the turning force of the tension spring 26, and the claw portion 21 reliably comes into contact with the peripheral surface of the heating roll 1. As a result,
The above-mentioned gap M is eliminated.

The restriction release position H of the restriction body 33
After the gap M is eliminated by the movement to
Is lowered again in preparation for the next fixing and returned to the regulation position L. As a result, the peeling claw 20 is again kept in a normal contact state with the peripheral surface of the heating roll 1 by the restricting body 33, and further rotation in the contact direction A is completely prevented. As a result, good sheet separation can be performed again, and occurrence of paper jam can be prevented.

Therefore, when the sheet P after fixing passes, the regulating member 33 is controlled based on the detection information from the sheet discharge detection sensor 7.
Is temporarily moved to the regulation release position H, since the peeling claw 20 returns to the normal state by the movement of the regulation body 33 to the regulation release position H as described above, continuous fixing is performed. However, the peeling claw is always kept in a normal state, and the sheet after fixing is always stably peeled.

In the rotation restricting device 30, even when the position change detecting sensor 39 detects that the restricting body 33 has dropped by a predetermined amount, the control device 38 operates the electromagnetic solenoid 35 based on the detection information. Then, the regulating body 33 is raised to move to the regulation release position H.

As a result, the gap M between the claw 21 and the peripheral surface of the heating roll 1 which is generated in accordance with the lowering of the regulating body 33 is eliminated. Thereafter, when the regulating body 33 is returned to the regulating position L again, the peeling claw 20 returns to a normal state. When the regulating body 33 moves down due to a paper jam and is detected by the position change detection sensor 39,
The regulating body 33 is set so as not to rise until the operation of removing and removing the jammed paper is completed. Accordingly, the rotation of the peeling claw 20 in the contact direction A due to the external force during the paper removing operation is prevented by the restricting body 33, and the occurrence of damage to the peripheral surface of the heating roll 1 can be reliably prevented. Become.

In the above-described embodiment, as the regulating body 33, the regulating position L and the regulation releasing position H are located on the side opposite to the heating roll 1 across the support shaft 25 of the peeling claw 20.
Although the configuration example in which the rotation between the peeling claws 20 is regulated so as to move between the two members has been described,
3 is arranged so as to move between the regulation position L and the regulation release position H between the support shaft 25 of the peeling claw 20 and the heating roll 1 so as to regulate the rotation of the peeling claw 20. You may.

The restricting body 33 is configured to operate the moving device 34 to move the restricting body 33 arbitrarily to one of the restriction position L and the restriction release position H in response to an instruction input by the operator. Is also good. In addition, the moving device 34
It is needless to say that the present invention is not limited to the above configuration.

Further, the paper peeling device 30 can be used in the same manner as the fixing device as described above, as long as the device has a rotating body which needs to peel the paper from the rotating peripheral surface. can do. Further, the rotating body is not limited to the roll type, and may be a belt type supported by a roll from the back surface.

[0044]

As described above, according to the present invention,
A rotating member provided with a regulating member for supporting and fixing a contact state of the sheet peeling claw member to the peripheral surface of the rotating body by the urging member, and for preventing further rotation in the contact direction from the contact state. Since the movement restricting device is provided, it is possible to more reliably prevent the paper peeling claw member from getting into the peripheral surface of the rotating body and damaging the peripheral surface by the occurrence of paper jam or the like with a simple configuration, and Thus, the contact state of the peeling claw member with the rotating body can be always kept constant.

Further, since the regulating member can be moved to the regulation releasing position, even if the state of contact of the claw member with the peripheral surface of the rotating body fluctuates, the regulating member can be moved as required. Is moved to the regulation release position, the pawl member is returned to a state in which the pawl member again comes into contact with the peripheral surface of the rotating body only by the urging member without being restricted by the restricting member. It can be easily returned to the contact state.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram showing an example of a fixing device to which a sheet peeling device of the present invention is applied.

FIG. 2 is a main part plan view showing the sheet peeling device of FIG. 1;

FIG. 3 is an explanatory diagram illustrating a configuration of a position change detection sensor.

FIG. 4 is an explanatory diagram showing a state in which a regulating body is moved to a regulation release position.

FIG. 5 is an explanatory diagram showing an operation state of the sheet peeling device.

FIG. 6 is an explanatory diagram showing a state when the position of the regulating body changes.

FIG. 7 is a schematic view showing a conventional paper peeling device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heating roll (rotary body), 7 ... Discharge sensor, 10
... Paper peeling device, 20 ... Peeling claw (paper peeling claw member), 2
DESCRIPTION OF SYMBOLS 1 ... claw part, 22 ... protrusion part, 25 ... support shaft, 26 ... tension spring (biasing member), 30 ... rotation restricting device, 31 ... support frame (fixing member), 33 ... regulating body (regulating member), 33
a: inclined surface portion, 34: moving device, 39: position change detection sensor (measuring device), A: contact direction, P: paper, S: gap, L: regulated position, H: regulated release position.

Claims (4)

[Claims] A sheet peeling claw member rotatably disposed around a support shaft near a sheet peeling area of a rotating body which needs to peel the sheet from a rotating peripheral surface; A sheet peeling device having a biasing member for applying a rotational force in a direction in which the claw portion of the claw member lightly abuts the peripheral surface of the rotating body; A regulating position for supporting a contact state of the member with the peripheral surface of the rotating body by the urging member and preventing a further rotation of the claw member in the contact state in the contact direction; A sheet peeling device, comprising: a rotation restricting device provided with a restricting member movable from a restriction releasing position in which the rotation restricting member is separated from contact with a part and does not prevent the rotation. 2. The rotation restricting device according to claim 1, wherein the rotation restricting device includes a protrusion formed so as to protrude to a side opposite to the claw portion across the support shaft of the paper peeling claw member; Is a fixed member fixedly arranged at an interval on the opposite side, and a wedge shape having an inclined surface portion which enters and intervenes in a gap between the protrusion and the fixed member and abuts on the protrusion to be locked. And a moving device for moving the regulating member between a regulating position in which the regulating member is lowered into the gap between the protrusion and the fixing member to be interposed and a regulation releasing position in which the regulating member is lifted up and separated from the gap. The sheet peeling device according to claim 1, wherein 3. The rotation restricting device is configured to temporarily move the restricting member to a restriction releasing position side after the sheet is separated from the rotating body and discharged.
Or the paper peeling device according to 2. 4. The rotation restricting device includes a measuring device for measuring a variation amount of the position of the sheet peeling claw member or the restricting member, and moves the restricting member to a restriction releasing position in accordance with measurement information from the measuring device. The sheet peeling device according to claim 1, wherein the sheet peeling device is set so as to be temporarily moved to the side.