JPH05313548A - Sheet body loading device - Google Patents

Abstract

PURPOSE:To provide the loading device of the sheet body which can surely bring the film into an even and close contact with over peripheral surface of a drum utilizing a mechanical constitution with a simple procedure without any expensive working or contribution to enlargement of the device when the film is loaded against the drum. CONSTITUTION:This device is provided with the drum 1 loaded with the sheet body, a leading tip pressing means 10 pressurizing the leading tip of the sheet body to the peripheral surface of the drum 1a, an end tip pressing means 20 pressurizing the end tip of the sheet body to the peripheral surface of the drum 1a, a pressing part moving means 30 to have the sheet body moved in the direction of tension along the peripheral surface of the drum 1a in a state where at least one of the two means 10 and 20 is pressurized to the sheet body and a squeezy unit 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet body mounting apparatus, for example, a sheet body mounting apparatus for mounting a sheet recording photosensitive film mainly on a recording side drum in a plate-making color scanner.

[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. At this time, when the film is mounted on the drum, it is required as a condition that both sides of the start end and the end of the film are mounted at predetermined positions on the peripheral surface of the drum, and a duplicate image is recorded on the film.

Therefore, conventionally, at least two positioning pins are provided upright on the outer peripheral surface of the recording side drum, and a pin hole engageable with the pin is formed near the leading end of the film, and the pin hole is formed as described above. The film is mounted at a desired position on the peripheral surface of the drum by engaging with the pin. Also, a suction method has been used as another example of means for stably holding the film on the peripheral surface of the drum.

According to this method, the drum has a hollow structure, one of which is connected to a vacuum source, and a suction hole is provided on the peripheral surface of the drum so that a film wound around the peripheral surface of the drum is sucked and held by a vacuum action. It was done to do. In order to carry out this adsorption action more effectively, the vacuum region of the drum is divided into a plurality of zone zones, each of which is provided with a switching valve, and the valve is used to selectively control the zone of use.

[0005]

In the former case, however, it is difficult to align the pin holes with the pins in the dark room work for handling the photosensitive film, and it is structurally complicated to automate it. There are problems in cost and operability. In the latter case, a large number of suction holes must be formed on the drum peripheral surface, and in order to prioritize efficiency, the suction area of the drum is divided, which not only directly affects the cost increase of the drum itself. In addition, since a separate vacuum source is required, the size of the entire apparatus becomes large, and it becomes a source of noise such as a pump, and the cost of the recording apparatus rises sharply.

The present invention is proposed in view of the above problems, and an object thereof is expensive such as a pin standing on a drum, a suction hole is provided to divide the drum, and a vacuum source is separately provided. To provide a device for mounting a sheet body, which is capable of uniformly adhering a film uniformly to a drum peripheral surface by a simple operation using a mechanical structure without encouraging various processings and an increase in size of the device. It is in.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a drum to which a sheet body is attached, a front end pressing means for pressing the front end of the sheet body against the peripheral surface of the drum, and a rear end of the sheet body. Rear end pressing means for pressing on the peripheral surface,
At least one of the front end pressing means and the rear end pressing means is provided with a pressing movement means for moving the sheet body in a tensioning direction along the peripheral surface of the drum while pressing the sheet body. To do.

[0008]

With the above construction, when the sheet body is attached to the drum peripheral surface, the tip of the sheet body is pressed against the drum peripheral surface by the tip pressing means, and the drum is rotated in this state to rotate the sheet body to the drum peripheral surface. While the film is being wound around, the rear end portion of the film is pressed against the drum peripheral surface by the rear end pressing means, and at least one of the both means is moved by the pressing movement means in a direction in which the sheet body is tensioned along the drum peripheral surface. Thus, the sheet body wound around the drum peripheral surface can be reliably attached to a predetermined position of the drum without floating from the drum peripheral surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a plate-making color scanner to which a sheet mounting apparatus of the present 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 a rear end pressing means 20 and a squeegee unit 40.

(Structure of Film Supply Unit 2) The film supply unit 2 is provided with a film magazine 2c for accommodating the roll film F, a supply roller 2b in its opening 2a, and a film magazine 2c for the supply roller 2b. A sensor 4 for detecting the tip of the film F and a cutter 5 for cutting the film F into a predetermined length are provided on the downstream side in the flow direction.

(Construction of Drum 1) The drum 1 is formed in a hollow cylindrical shape having a relatively large diameter, and a part of the peripheral surface 1a thereof is provided with a plurality of grooved grooves 1c (FIG. 2) 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 the tip pressing means 10) From the state where the tip pressing metal fitting 10 shown in FIG. 3 is in close contact with the drum peripheral surface 1a, as shown in FIG. 4, the tip pressing metal fitting 10d.
The first and second eccentric cams 30 and 31 are provided on the frame 9 as a mechanism for separating the drum from the drum peripheral surface 1a so as to be driven via the transmission mechanism 11a.

As shown in FIG. 4, the first eccentric cam 30 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, and the eccentric cam 30 has a high-position peripheral surface. To the swing arm 10b,
Tip pressing metal fitting 10 against the elastic force of the spring 10f
It is configured to lift d and open the inlet side 10 g so as to sandwich the leading end of the film F supplied.

The second eccentric cam 31 is driven in conjunction with the motor 11 via the transmission mechanism 11a when the leading end pressing means 10 is in the B position for releasing the film F, and the high position peripheral surface of the second eccentric cam 31 swings the swing arm 10b. Engage with spring 10f
The tip pressing member 10d is lifted up against the elastic force of the above to open the entrance side 10g and release the pressing tip of the film F.

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.

(Construction of the rear end pressing means 20) The rear end pressing 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 action of the tension spring 20e, and the rear end pressing member 20a is rotated by about 1/4 rotation 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 trailing edge of the triangular cam 20d is moved to the rear edge of the film F by the next rotation transition (about 1/4 rotation). The pressing metal fitting 20a is moved (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 1a by the trailing edge pressing metal 20a by the subsequent rotational movement of the triangular cam 20d (about 1/4 rotation), and the drum peripheral surface 1
The pressing / moving means 35 is configured by causing the film F to act in the tensioning direction along a, that is, by moving the trailing end pressing means 20 from the position shown in FIG. 7 to the position shown in FIG.

By operating the rear end pressing member 20a as described above, the film F can be mounted on the drum 1 while pulling. 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. Squeegee roller 40a
Is a cylindrical body having a length close to the axial length of the drum 1 and having a small diameter, and is rotatably attached to the free end of the squeegee unit 40 in parallel with the axial direction of the drum peripheral surface 1a. The squeegee unit 40 is supported by the squeegee unit 40 so as to come into contact with and separate from the drum peripheral surface 1a.
Driven by the rotation of the squeegee roller 40a and the drum peripheral surface 1
It is configured to suppress the floating of the film F wound around the drum peripheral surface 1a by being interposed between the film F and a.

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 peeling claw 45 is driven by the solenoid 45b.

The peeling claw 45 is arranged at a position facing the groove 1c formed on the drum peripheral surface 1a, the base is fixed to one same shaft 45a, and the shaft 45a of the squeegee unit 40 is fixed. The frame 45 is rotatably rotatably supported, and the free end is oscillated about the shaft 45a by the operation of the solenoid 45b. The peeling claw 45 oscillates toward the drum peripheral surface 1a. At this time, the free end portion is caused to enter the plurality of grooved grooves 1c formed on the drum peripheral surface 1a, and the drum 1 is rotated to rotate the drum 1.
The film F wound around the peripheral surface 1a is peeled off by scooping up the back surface of the peeling claw 45.

(Film F winding and peeling process) Next, the winding process for winding the film F on the drum 1 will be described with reference to FIG.
Through the order shown in FIG. Specifically, by detecting the notch position of the notch disc 7 shown in FIG. 2 with the sensor 8,
The drum 1 positions the tip pressing means 10 at the origin A (reference position) by the signal of the pulse motor 6 (see FIGS.
1) Then, as shown in FIG. 4, the eccentric cam 30 rotates in the direction of the arrow 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 (see FIG. 12). afterwards,
By further continuing the rotation of the first eccentric cam 30, as shown in FIG. 3, the swinging arm 10b moves away from the high position of the first eccentric cam 30 and moves downward, and the tip pressing metal fitting 10d closes the inlet side 10g and the film. The front end of F is sandwiched, and the front end of the sandwiched 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 (the reference position of the tip pressing means 10), the rotation of the drum 1 is temporarily stopped and the film F is cut into a predetermined amount by the cutter 5. 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, by rotating the triangular cam 20d, the rear end pressing means 20 shifts 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 the 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, and the squeegee roller 40a is brought into close contact with the peripheral surface 1a of the drum 1 (see FIG. 18). ). Then, the second eccentric cam 31 is rotated in the arrow direction,
As shown in FIG. 4 again, the swinging arm 10b is moved upward to lift the tip pressing member 10d to open the entrance side 10g to release the pressing of the tip of the film F and the second eccentric cam 31.
The squeegee roller 40a reversely strokes the surface of the film F by the engagement of the high position peripheral surface of the roller 40b with the peripheral surface of the roller 40b, and the film F is slid with respect to the drum peripheral surface 1a.
The close contact state of is relaxed (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. Then, the peeling claw 45 is inserted into the groove 1c of the drum peripheral surface 1a and the drum 1 is rotated, so that the film F wound around the drum peripheral surface 1a is forcibly peeled on the back surface of the peeling claw 45. (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 the present embodiment, the trailing edge pressing means 20 is moved in order to tension the film F. However, the structure of the trailing edge pressing means 20 is used as the leading edge pressing means 10 to move the leading edge pressing means 10. Alternatively, both means 10, 20 may be moved simultaneously.

[0033]

As described above, according to the present invention, the engaging pin is erected on the drum as in the conventional case, or the vacuum source is separately provided by forming the suction hole on the peripheral surface of the drum which is difficult to process. There is no need to increase the size and cost of the device, and there is no need to consider the noise of the vacuum pump, etc., and the mechanical structure makes the sheet uniform on the drum with a simple operation. In addition to the effect of being able to apply the film reliably and reliably, the film that has been applied once is securely held on the drum because of the mechanical structure even if an unexpected electrical trouble such as a power failure occurs suddenly. It also has an effect that can be achieved.

[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]

 DESCRIPTION OF SYMBOLS 1 drum 1a drum peripheral surface 10 front end pressing means 20 rear end pressing means 35 pressing moving means

Claims (1)

[Claims] 1. A drum to which a sheet body is attached, a front end pressing means for pressing the front end of the sheet body against the peripheral surface of the drum, and a rear end pressing means for pressing the rear end of the sheet body against the peripheral surface of the drum. And a pressing movement means for moving at least one of the front end pressing means and the rear end pressing means in a direction in which the sheet body is tensioned along the peripheral surface of the drum while the sheet body is being pressed. Seat body mounting device.