JPH05313549A - Sheet body stripping device - Google Patents

Abstract

PURPOSE:To simply and effectively strip a film from its leading tip by rotating a drum forwardly in a state where a stripping claw is brought into contact with a peripheral surface of the drum and stripping the sheet body from the peripheral surface of the drum. CONSTITUTION:A leading tip pressing means 10 is disposed on the peripheral surface of the drum 1a. Furthermore, the stripping claw 45 driven by a solenoid 45 as the stripping claw driving means is disposed in a position faced to grooves 1c formed on the periphery surface of the drum 1a, its base part is fixed to a piece of an identical shaft 45a, this shaft 45a is supported to be freely rotated by a frame body of a squeezing unit 40 and a free edge part is oscillated by the action of the solenoid 45b around this shaft 45a as a fulcrum. Then, when this stripping claw 45 is oscillated to the side of the periphery surface of the drum 1a, the free end part is inserted to a multiple number of grooves 1c formed on the peripheral surface of the drum 1a and the film F wrapped around the peripheral surface 1a of the drum 1 is stripped by scooping up with a back surface of the stripping claw 45 due to the rotation of the drum 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet body peeling apparatus, and more particularly to a sheet body peeling apparatus for peeling a sheet body attached to a drum from the peripheral surface of the drum. It

[0002]

2. Description of the Related Art Generally, in a drum type image scanning recording apparatus such as a plate-making color scanner, a sheet-shaped photosensitive film is used as a photosensitive material for recording a duplicate image. The film is wound in a state of being pressed against the peripheral surface of the drum by a front end pressing means or the like, is attached to a predetermined position on the peripheral surface of the drum, and a duplicate image is recorded on the film by scanning exposure based on an image signal.

The recording-completed film is peeled off from the peripheral surface of the drum. In this case, in the conventional case, since the leading end pressing metal fitting, which presses the leading end of the film, obstructs (impedes) peeling of the film, it is inevitably peeled from the rear end of the film.

[0004]

However, when the film deposited on the drum is peeled from the rear end, the drum must be rotated in the reverse direction with respect to the winding direction of the film, and a reversing mechanism therefor is required. In addition, since the winding length is different depending on the type of film used, the position of the rear end of the film is not constant, and therefore the mechanism for setting the position for peeling from the rear end becomes complicated and cannot be said to be a practically appropriate method. ..

Therefore, there is a concept that the tip pressing metal member is retracted into the peripheral surface of the drum so as to be peeled from the tip of the film, but this method also complicates the structure and unnecessarily raises the manufacturing cost. There is a problem that becomes. The present invention is proposed in view of the above problems,
The purpose is to have a structure that does not select a practically inappropriate method such as peeling the film from the rear end, and also retracts the tip pressing metal fitting inside the drum peripheral surface to peel the film from the front end. Another object of the present invention is to provide a sheet body peeling device that can effectively peel the film from the leading end by simply releasing the holding operation of the leading end holding means of the film.

[0006]

In order to achieve the above-mentioned object, the present invention comprises a front end pressing means for pressing the front end of the sheet body against the peripheral surface of the drum, and a peeling claw for separating the sheet body from the peripheral surface of the drum.
When the drum is rotated up to the position where the tip pressing means reaches the sheet separating position, the pressing releasing means for releasing the pressing of the tip pressing means, and the tip pressing means in a state of being in contact with the sheet body near the tip pressing means A sheet body sliding means that is driven in synchronization with the pressing release operation to slide the leading end of the sheet body rearward from the leading end pressing means, and a drum circumference between the leading end pressing means and the sheet leading end when the sheet body is slid by the sliding means. A peeling pawl driving means for driving the peeling pawl so as to come into contact with the surface, and the drum is normally rotated with the peeling pawl in contact with the drum peripheral surface to separate the sheet body from the drum peripheral surface. It is a feature.

[0007]

According to the above construction, when the sheet member adhered to the drum is peeled off, at the sheet member peeling position, the pressing operation of the tip pressing unit is released by the pressing release unit, and the sheet unit is slid by the sliding unit. On the other hand, the peeling claw is brought into contact with the peripheral surface of the drum, and the sheet member attached to the peripheral surface of the drum by the normal rotation of the drum is peeled from the tip portion of the drum.

[0008]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a plate-making color scanner to which the sheet body peeling device of the invention is applied, and FIG. 2 is a plan view thereof. (Overall Structure) In the color scanner of this embodiment, a drum 1 on which a photosensitive film F as a sheet is adhered, and an upstream side in the rotation direction of the drum 1 (that is, the film F relative to the drum 1).
And the film supply unit 2 for supplying the unexposed film F, and the downstream side in the rotation direction of the drum 1 (that is, the advancing side of the film F wound on the drum 1), and the drum peripheral surface. Exposure means 3 in which the exposure head 3a is opposed to 1a
A tip pressing means 10 arranged on the drum peripheral surface 1a,
It is composed of the rear end pressing means 20 and the squeegee unit 40.

(Structure of Film Supply Unit 2) The film supply unit 2 has a magazine 2c for storing the roll film F therein.
A supply roller 2b is provided in the opening 2a, and the sensor 4 for detecting the leading end of the film F and the film F are cut to a predetermined length downstream of the supply roller 2b in the flow direction of the film F. The cutter 5 is provided and configured.

(Structure of Drum 1) The drum 1 is formed in a hollow cylindrical shape having a relatively large diameter, and a plurality of grooved grooves 1c (FIG. 2) are provided on a part of the peripheral surface 1a of the drum 1 with respect to the frame 9. Is rotatably supported, and both side ends of the drum 1 are closed by flange-shaped side plates 1b. Further, as shown in FIG. 2, one end of the shaft portion of the drum 1 is connected to the pulse motor 6 via a coupling, and the other end is provided with a notched disk 7 that rotates in synchronization with the drum 1. The sensor 8 reads the notch 7 so as to detect the origin A (reference position) of the drum 1 and use it to position and mount the film F on the drum 1.

Here, the origin A means a position where the tip pressing means 10 exists near the contact point between the flow direction of the film F and the drum peripheral surface 1a as shown in FIG. (Structure of Tip Holding Means 10) The tip holding means 10 is
As shown in FIG. 2, a swing arm 10b that swings up and down in conjunction with the rotation of a later-described first eccentric cam 30, and a plurality of tip pressing fittings fixed to a base shaft 10c of the swing arm 10b at intervals. 10d and the base shaft 10c of the swing arm 10b.
A bearing metal fitting 10e scattered on the drum peripheral surface 1a for rotatably supporting the base shaft 10b, and a spring 10 for pressing the tip pressing metal fitting 10d to the drum peripheral surface 1a.
As shown in FIG. 3, a locking body 10h such as a rubber sheet is attached to the surface of the tip pressing member 10d facing the drum peripheral surface 1a.

(Structure for Driving Tip Pressing Means) As shown in FIG. 4, the tip pressing metal fitting 10 shown in FIG. 3 is in close contact with the drum peripheral surface 1a.
As a mechanism for separating d from the drum peripheral surface 1a, the first and second eccentric cams 30 and 31 are provided on the frame 9 so as to be driven via the transmission mechanism 11a, and are released by the second eccentric cam 31. Constitutes a means.

As shown in FIG. 4, the first eccentric cam 30 is provided.
Is driven by the motor 11 via the transmission mechanism 11a when the tip pressing means 10 is at the origin A position of the drum 1, the high position peripheral surface of the eccentric cam 30 is engaged with the swing arm 10b, and the elasticity of the spring 10f is reached. The tip pressing member 10d is lifted against the force to open the entrance side 10g and sandwich the tip of the film F supplied.

The second eccentric cam 31 as the pressing release means is driven in conjunction with the motor 11 via the transmission mechanism 11a when the leading end pressing means 10 is in the position B for releasing the film F, and its high position circumference is maintained. The surface is engaged with the swing arm 10b to lift the tip pressing metal member 10d against the elastic force of the spring 10f to open the entrance side 10g and release the tip of the film F pressed. ..

The eccentric cams 30 and 31 are linked to the same drive source (motor) 11 via a transmission mechanism 11a having a one-way clutch 11b.
Both of the eccentric cams 30 and 31 are driven during the forward rotation of the motor 1, and only the eccentric cam 31 during the reverse rotation of the motor 11 is driven. Further, when both the eccentric cams 30 and 31 are in a stationary state, the stationary position is controlled by the operation of an attached sensor (not shown) so that the respective high position peripheral surfaces cannot engage with the swing arm 10b. It is made like this.

(Structure of Rear End Holding Means 20) The rear end holding means 20 is, as shown in FIGS. 1 and 2, a drum peripheral surface 1a.
A rear end pressing member of a rod-shaped body having a predetermined width parallel to the axial direction of the drum 1 and having a consistent axial length at a position downstream of the front end pressing means 10 in the drum rotation direction. 20a and a support plate 20c, one end of which is connected to both ends of the rear end pressing member 20a and the other end of which is swingably supported by the drum side plate 1b through a long hole. Further, as shown in FIG. 5, it comprises a tension spring 20e hanging on the supporting plate 20c and the drum side plate 1b, and a triangular cam 20d engaging with a square window hole 20b opened in the central portion of the supporting plate 20c. There is.

5 to 8 show the operating state of the trailing edge pressing means 20. The triangular cam 20d is configured such that when the drum 1 makes one rotation while winding the film F, it makes about one rotation in conjunction with the motor 11 via the coupling 20g based on a signal from the pulse motor 6. There is. First, the rear end pressing member 20a is always in pressure contact with the drum peripheral surface 1a by the elastic force of the tension spring 20e, and the rear end pressing member 20a is rotated by about 1/4 of the triangular cam 20d. Is separated from the drum peripheral surface 1a against the elastic force of the spring 20e (FIG. 5), and the film F is moved by the next rotation transition (about 1/4 rotation) of the triangular cam 20d.
The rear end pressing metal fitting 20a is moved onto the rear end of the triangular cam 20d (FIG. 6), and the next rotation transition of the triangular cam 20d (about 1/4 rotation)
Then, the rear end of the film F is pressed against the drum peripheral surface 1a by the rear end pressing fitting 20a (FIG. 7).

Then, the trailing edge of the film F is pressed against the drum peripheral surface 1a by the rear-end pressing metal member 20a by the subsequent rotational movement of the triangular cam 20d (about 1/4 rotation), and along the drum peripheral surface 1a. The pressing / moving means 35 is constituted by causing the film F to act in the direction in which the film F is tensioned (that is, by moving the rear end pressing means 20 from the position shown in FIG. 7 to the position shown in FIG. 8).

As described above, by operating the rear end pressing metal fitting 20a, the film F can be mounted on the drum 1 while being pulled. FIG. 9 shows the locus of movement of the rear end pressing member 20a in the operating state of FIGS. (Structure of squeegee unit 40) On the downstream side of the origin A position of the drum 1 in the rotational direction, as shown in FIGS. 1 and 2, a frame body having a concave cross section sandwiching the axial length of the drum 1 is formed. A squid unit 40 is provided.

The squeegee unit 40 has a base portion supported by the frame 9 so as to swing by the operation of the solenoid 40s, and includes a squeegee roller 40a and a peeling claw 45. The squeegee roller 40a is the drum 1
Is formed into a small-diameter columnar body having a length close to the axial length dimension of, and is rotatably supported by the free end of the squeegee unit 40 in parallel with the axial direction of the drum peripheral surface 1a. The squeegee roller 40 is configured to come into contact with and separate from the drum peripheral surface 1a by the swinging motion of the squeegee unit 40, and when the drum peripheral surface 1a comes into contact, the squeegee roller is driven by the rotation of the drum peripheral surface 1a. The film F is wound between the drum peripheral surface 1a and the drum peripheral surface 1a so as to suppress the floating of the film F wound around the drum peripheral surface 1a.

At one end of the shaft of the squeegee roller 40a, a disc-shaped roller 4 having a diameter larger than that of the squeegee roller 40a.
0b is integrally fixed. The peripheral surface of the roller 40b is engageable with the peripheral surface of the second eccentric cam 31 for releasing the pressing operation of the tip pressing means 10.
When the second eccentric cam 31 rotates in the arrow direction of FIG. 1,
The peripheral surface of the roller 40b engages with the high-position peripheral surface of the second eccentric cam 31 to rotate in the reverse direction with respect to the winding direction of the film F, and the peripheral surface of the squeegee roller 40a strokes the film F backward. Resistance is applied to slide the film F so as to alleviate the close contact with the drum peripheral surface 1a. The squeegee roller 40a corresponds to the sliding means.

The peeling claw 45 is driven by a solenoid 45b as a peeling claw driving means for operating it.
The peeling claw 45 has a groove 1c formed on the drum peripheral surface 1a.
Is arranged at a position facing the
The shaft 45a is rotatably supported on the frame body of the squeegee unit 40, and the free end portion swings by the operation of the solenoid 45b with the shaft 45a as a fulcrum. When the peeling claw 45 swings to the drum peripheral surface 1a side, a plurality of grooved grooves 1c having free ends formed on the drum peripheral surface 1a.
To the peripheral surface 1 of the drum 1 by rotating the drum 1.
The film F wound around a is peeled off by scooping up the back surface of the peeling claw 45.

(Film F Winding / Peeling Step) Next, the winding step for winding the film F on the drum 1 is performed in the order of FIGS. 10 to 16. Specifically, the notch position of the notch disk 7 shown in FIG. 2 is detected by the sensor 8, so that the drum 1 receives the signal from the pulse motor 6 and the tip pressing means 1 is pressed.
0 is positioned at the origin A (reference position) (see FIGS. 10 and 11), and then the first eccentric cam 30 rotates in the arrow direction as shown in FIG. 4 to swing the arm 10b of the tip pressing means 10.
Is swung upward and the tip pressing metal fitting 10b is lifted to open the inlet side 10g.

Then, the unexposed film F stored in the film supply section 2 is fed out by the supply roller 2b, the leading edge thereof is detected by the film detection sensor 4, and the detection is stopped after a predetermined time from the detection (see FIG. 12). Then, as the first eccentric cam 30 continues to rotate, the swing arm 10b moves away from the high position of the first eccentric cam 30 and moves downward, as shown in FIG. 3, and the tip pressing member 10d closes the inlet side 10g. The tip of the film F is sandwiched and the sandwiched tip of the film F is pressed and fixed to the drum peripheral surface 1a (see FIG. 13).

Thereafter, the drum 1 is rotated by the pulse motor 6 to wind the film F around the drum peripheral surface 1a. At this time, the squeegee roller 40a is retracted from the peripheral surface 1a of the drum 1 and does not hinder the passage of the tip pressing means 10. When the tip pressing means 10 passes the position of the squeegee roller 40a, the solenoid 40s is operated to lower the squeegee unit 40 by controlling the number of pulses supplied to the pulse motor 6, and the peripheral surface of the squeegee roller 40a is moved to the drum peripheral surface 1a.
It is brought into contact with the film F that is wound around to prevent the film F from floating (see FIG. 14).

When the drum 1 has made about one rotation to the origin A (reference position of the tip pressing means 10), the rotation of the drum 1 is temporarily stopped and the film F is cut by the cutter 5 to a predetermined amount. The trailing edge of the film F cut at this time is the squeegee roller 4
0a on the drum peripheral surface 1a, which is separated by a certain distance (see FIG. 15). After that, the coupling 20g is turned on (connected) by a signal from the pulse motor 6 due to one rotation of the drum 1, and the triangular cam 20d is rotated by the motor 11 via the power transmission mechanism 11a as shown in FIG. With this rotation operation, the rear end pressing metal member 20a is lifted together with the support plate 20c to sandwich the rear end of the film F, and the rear end pressing metal member 20a is tilted forward as shown in FIG.
As described above, the rear end of the film F is pressed against the drum peripheral surface 1a.

Further, the rotation of the triangular cam 20d causes the rear end pressing means 20 to shift to the state shown in FIG. At this time, the trailing edge pressing metal member 20a presses the trailing edge of the film F against the drum peripheral surface 1a by the action of the spring 20e, and tensions the film F against the leading edge pressing means 10 along the drum peripheral surface 1a (FIG. 16). Then, by the above operation, the film F
Is uniformly and tightly wound around the drum peripheral surface 1a.

After the film F having a desired length is wound around the drum peripheral surface 1a, the squeegee unit 40 is raised to move the squeegee roller 40a to the drum peripheral surface 1a as shown in FIG.
The scanning exposure recording based on the image signal is performed by the exposure head 3a on the film F, which is separated from a and is wound around the drum peripheral surface 1a. Next, the process of peeling the film F from the drum 1 is performed in the order of FIGS.

The film F for which scanning exposure recording has been completed is peeled off from the drum peripheral surface 1a. In this case, the drum 1 is stopped when the tip pressing means 10 reaches the film peeling position B (that is, the position of the second eccentric cam 31 forming the pressing releasing means K), and the squeegee roller 40 as a sliding means.
a is brought into close contact with the drum peripheral surface 1a (see FIG. 18).

Then, the second eccentric cam 31 as the pressing release means K is rotated in the direction of the arrow, the swinging arm 10b is moved upward again as shown in FIG. 4, and the tip pressing metal fitting 10d is lifted to open the inlet side 10g. The squeegee roller 40a reversely strokes the surface of the film F by releasing the pressing force on the front end of the film F and engaging the high position peripheral surface of the second eccentric cam 31 with the peripheral surface of the roller 40b.
The film F is slid with respect to to relax the close contact state of the film F (see FIG. 19).

As described above, the drum peripheral surface 1 is formed by releasing the tip.
The film F, which has lost the tension on a, is detached from the leading end pressing metal fitting 10a by the operation of the trailing end pressing means 20. The peeling claw 45 is inserted into the groove 1c of the drum peripheral surface 1a by the solenoid 45b to rotate the drum 1, so that the film F wound around the drum peripheral surface 1a is forced on the back surface of the peeling claw 45. Are peeled off (see FIG. 20).

The peeled film F is forcibly conveyed by the discharge roller 50 at the downstream position in the film flow direction and supplied to the developing device (not shown) (see FIG. 21).
In this embodiment, the squeegee unit 40 provided with the squeegee roller 40a is used as the sliding means. However, as another example, a brush body that slides on the upper surface of the film F or a resistance plate is used. The configuration of the slide means is not particularly limited without departing from the scope of the present invention.

[0033]

As described above, according to the present invention, when the sheet member attached to the drum is peeled off, an improper method such as reversing the motor for peeling from the rear end of the film is used. Without the need for a complicated structure for retracting the front end pressing metal fitting within the peripheral surface of the drum, the pressing release means and the sliding means cooperate with each other to smoothly and reliably move the seat from the front end of the sheet body. The present invention has the effect that the body can be peeled from the peripheral surface of the drum, and a peeling device for a sheet body that does not have a risk of contaminating the image of the copied and recorded sheet body can be manufactured inexpensively with an appropriate configuration.

[Brief description of drawings]

FIG. 1 is a schematic side view of a plate-making color scanner equipped with the present invention.

FIG. 2 is a schematic plan view of a plate-making color scanner equipped with the present invention.

FIG. 3 is a side view showing an operating state when the tip pressing means is pressed.

FIG. 4 is a side view showing an operating state when the tip pressing means is opened.

FIG. 5 is a side view showing an operating state of the rear end pressing means.

FIG. 6 is a side view showing an operating state of the rear end pressing means.

FIG. 7 is a side view showing an operating state of the rear end pressing means.

FIG. 8 is a side view showing an operating state of the rear end pressing means.

FIG. 9 is a view showing an operation locus of the trailing edge pressing means.

FIG. 10 is a side view of an essential part showing a film winding step.

FIG. 11 is a side view of an essential part showing a film winding step.

FIG. 12 is a side view of an essential part showing a film winding step.

FIG. 13 is a side view of an essential part showing a film winding step.

FIG. 14 is a side view of an essential part showing a film winding step.

FIG. 15 is a side view of an essential part showing a film winding step.

FIG. 16 is a side view of an essential part showing a film winding step.

FIG. 17 is a side view of an essential part showing a film winding step.

FIG. 18 is a side view of an essential part showing a film winding step.

FIG. 19 is a side view of an essential part showing the film winding step.

FIG. 20 is a side view of an essential part showing the film winding step.

FIG. 21 is a side view of an essential part showing the film winding step.

[Explanation of symbols]

 1 Drum 1a Drum peripheral surface 45 Peeling claw

Claims (1)

[Claims] 1. A front end pressing means for pressing the front end of the sheet body against the peripheral surface of the drum, a peeling claw for separating the sheet body from the peripheral surface of the drum, and a drum rotated to a position where the front end pressing means reaches a peeling position of the sheet body. At this time, a pressing release means for releasing the pressing of the tip pressing means and a pressing release operation of the tip pressing means in a state of being in contact with a sheet body in the vicinity of the tip pressing means are driven,
A sheet body sliding means for sliding the leading edge of the sheet body rearward from the leading edge pressing means; and when the sheet body is slid by the sliding means,
The peeling claw driving means for driving the peeling claw so as to come into contact with the drum peripheral surface between the front end pressing means and the sheet front end is provided, and the drum is normally rotated while the peeling claw is in contact with the drum peripheral surface,
A sheet body peeling device, characterized in that the sheet body is peeled from the peripheral surface of the drum.