JPH08183216A - Cylinder inside-scanning recorder - Google Patents

Abstract

PURPOSE: To hold a photosensitive material closely on the inside of a cylindrical drum by simple constitution by installing a pair of claw members etc., which fit both ends protruding from an opening among the ends of a photosensitive material placed on the inside of the drum. CONSTITUTION: A photosensitive material W has rigidity in some degree and is placed on the inside 1a of a cylindrical drum 1 keeping a space between it and the inside 1a. The first press members 21, 41 are moved from side positions toward the lower periphery of the drum, and the second press members 22, 42 are moved from side positions toward the outside of the radial direction of the drum. The first press member 21 presses the rear end of the material W toward the lower periphery of the drum, while the first press member 41 presses the front end of the material W in the same way. In this way, force is applied to the outside of the radial direction to contact the material W closely with the inside 1a. Since the members 22, 42 press the vicinities of both ends of the material W toward the inside 1a in this process, the whole surface of the material W can be contacted closely and surely with the inside 1a with the vicinities of both ends of the material W prevented from being warped inside by buckling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical inner surface scanning recording device for drawing a desired image on a photosensitive material by holding the photosensitive material on the inner surface of a cylindrical drum and scanning a light beam from the center of the cylinder onto the photosensitive material. And more particularly to a mechanism for holding a photosensitive material on the inner surface of a cylindrical drum.

[0002]

2. Description of the Related Art Conventionally, as a cylindrical inner surface scanning recording apparatus of this type, as shown in FIGS.
Of the scanning mirror 101, which holds the photosensitive material W by suction on the inner surface 100a of the drum 00, and is inserted into the cylindrical central axis of the cylindrical drum 100.
By rotating the light beam L from the light source 102 around the cylinder central axis via the and moving along the cylinder central axis,
A desired image is drawn on the photosensitive material W.

The cylindrical drum 100 is formed in the shape of a hollow cylinder, and a part of its upper portion in the circumferential direction is opened. The photosensitive material W is loaded and unloaded through the opening 103. When the distance between the photosensitive material W and the scanning mirror 101 is displaced, a defocus occurs and the image drawn on the photosensitive material W is blurred. Therefore, the photosensitive material W must be firmly attached to the inner surface 100a of the cylindrical drum 100. . Therefore, in the cylindrical drum 100, the inner surface 100a of the cylindrical drum 100 adsorbs and holds the photosensitive material W, and the inner chamber 105 communicating with the adsorbing portion 104.
And a decompression mechanism such as a blower (not shown) for decompressing the inner chamber 105, and the inner chamber 1 is operated by operating the decompression mechanism.
05 is depressurized to adsorb and hold the photosensitive material W on the adsorbing section 104.

[0004]

However, the prior art having such a structure has the following problems.

That is, the adsorption portion 10 is attached to the cylindrical drum 100.
4 and the inner chamber 105 have to be formed, the structure of the cylindrical drum 100 is complicated, and the manufacturing cost is high. In particular, in the suction portion 104, it is necessary to process the lattice-shaped grooves 106 and the holes 107 communicating with the inner chamber 105 on the inner surface 100a, which is troublesome.

Further, in order to correspond to the size of the photosensitive material W, a plurality of suction areas 104a and 104b are formed on the inner surface 100a.
Is provided, and the suction area has to be switched according to the size of the photosensitive material W, which is troublesome.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cylindrical inner surface scanning recording apparatus capable of closely holding a photosensitive material on the inner surface of a cylindrical drum with a simple structure.

[0008]

The present invention has the following constitution in order to achieve such an object. That is, the cylindrical inner surface scanning recording apparatus according to claim 1 holds a sheet-shaped photosensitive material on the inner surface of a cylindrical drum, and scans a light beam from the center of the cylinder onto the photosensitive material to form an image on the photosensitive material. In a cylindrical inner surface scanning recording apparatus for recording, the cylindrical drum has an opening for loading and unloading the photosensitive material, a part of which in the circumferential direction is opened along the axial direction, and is loaded on the inner surface of the cylindrical drum. A pair of claw members that engage with both ends of the photosensitive material that protrude from the opening, and at least one claw member of the pair of claw members in the circumferential direction of the inner surface of the cylindrical drum. And pressing means for urging them in a direction facing each other.

According to a second aspect of the present invention, there is provided the apparatus according to the first aspect.
In the device according to, the pair of claw members,
It is divided into a plurality along the axial direction of the cylindrical drum.

According to a third aspect of the present invention, there is provided the apparatus according to the first aspect.
The apparatus described in (1) above is provided with a second pressing unit that acts on both ends of the photosensitive member that engages with the claw member and urges the cylindrical drum outward in the radial direction.

According to a fourth aspect of the present invention, there is provided the apparatus according to the first aspect.
In the apparatus described in the item (1), the at least one claw member swings outward in the radial direction of the cylindrical drum.

The apparatus according to claim 5 is the device according to claim 1.
The apparatus described in (1) is provided with a retracting mechanism that retracts the claw member on the carry-in side of the opening from the transport path.

According to a sixth aspect of the present invention, there is provided an apparatus according to the first aspect.
In the apparatus described in the item (1), the engaging portions of the pair of claw members are formed in a tapered shape that expands toward the front.

[0014]

The operation of the present invention is as follows. That is,
According to the invention of claim 1, when the photosensitive material is brought into close contact with the inner surface of the cylindrical drum, the photosensitive material is carried into the inner surface of the cylindrical drum, and then the both ends of the photosensitive material are engaged by the pair of claw members to hold down the pressing means. Since at least one of the claw members is urged in a direction in which the claw members face each other along the circumferential direction of the inner surface of the cylindrical drum, the photosensitive material is pressed against the inner surface of the cylindrical drum and brought into close contact therewith.

According to the second aspect of the present invention, since the claw member is divided into a plurality of parts along the axial direction, even if the lengths of both ends of the photosensitive material are different in the axial direction, the plurality of claw members are used to expose the photosensitive material. Both ends of the material can be engaged independently and can be uniformly urged by each holding means. Therefore, the photosensitive material is evenly adhered to the inner surface of the cylindrical drum without a gap.

According to the third aspect of the present invention, the photosensitive material is applied to the inner surface of the cylindrical drum by the pressing means while the vicinity of both ends of the photosensitive material is urged outward in the radial direction of the cylindrical drum by the second pressing means. It is urged and closely attached. Therefore,
The vicinity of both end portions of the photosensitive material does not float up from the inner surface, and the photosensitive material is securely adhered to the inner surface of the cylindrical drum.

According to the fourth aspect of the present invention, since the claw member swings outward in the radial direction of the cylindrical drum, the vicinity of both ends of the photosensitive material floats up from the inner surface when the pressing means urges the photosensitive material. And the photosensitive material is securely attached to the inner surface of the cylindrical drum.

According to the fifth aspect of the present invention, the pressing mechanism is retracted from the conveying path by the retracting mechanism, and in this state, the photosensitive material is carried in along the inner surface of the cylindrical drum. After that, the pressing means presses both ends of the photosensitive material to bring them into close contact with each other. After the image is recorded, the pressing means is again retracted from the transport path by the retracting mechanism, and the photosensitive material is unloaded.

According to the sixth aspect of the present invention, since the engaging portion of the claw member is formed in a taper shape that spreads in the forward direction, even if both ends of the photosensitive material are wavy, the claw member is engaged. The mating portion securely engages both ends of the photosensitive material.

[0020]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a cylindrical inner surface scanning recording apparatus according to an embodiment of the present invention.

In the figure, reference numeral 1 is a cylindrical drum formed in a cylindrical shape, and a part of its circumferential direction is opened along the axial direction. The photosensitive material W is loaded and unloaded through the opening 2. Above the opening portion 2, the first conveying roller 3 that conveys the photosensitive material W conveyed from outside the figure to the inner surface 1a of the cylindrical drum 1, and the photosensitive material W that is conveyed from the first conveying roller 3 into the cylindrical drum 1 Second guide for guiding the guide 4 to the mouth 1b and the photosensitive material W on which the image is drawn out through the guide 5
A conveyance roller 6 is provided. Also, the cylindrical drum 1
A scanning mirror 7 is provided at the center of the cylinder so as to be rotatable about its central axis and movable along the central axis.
A desired image is drawn on the photosensitive material W held on the inner surface 1 a of the cylindrical drum 1 by scanning the light beam L emitted from a light source (not shown) through the scanning mirror 7.

A guide 4 is provided on the side of the carry-in port 1b of the cylindrical drum 1.
A carrying-in mechanism 10 for carrying in the photosensitive material W guided through the inner surface 1a of the cylindrical drum 1 and a rear pressing mechanism 20 for pressing the rear end of the photosensitive material W carried to a predetermined position of the inner surface 1a are provided. Has been done. Outlet 1 facing these
A front pressing mechanism 4 for pressing the front end portion of the photosensitive material W toward the c side.
0 and a carry-out mechanism 50 for carrying out the photosensitive material W on which an image is drawn from the cylindrical drum 1. Carrying port 1b
The respective mechanisms on the side of the carry-out port 1c and the side of the carry-out port 1c are substantially the same, and the configuration of each mechanism on the side of the carry-in port 1b will be described in detail below with reference to FIGS.

In the carry-in mechanism 10, as shown in FIG. 2, a carry-in roller 11 is rotatably supported between side frames 8 arranged opposite to each other on both sides of the cylindrical drum 1. A driven pulley 12 is attached to one end of the carry-in roller 11, and a drive pulley 14 is attached to an output shaft of a first motor 13 provided on one frame 8. The transmission belt 15 is wound around the main driving pulley 14 and the driven pulley 12, and the first motor 13 is driven, whereby the carry-in roller 11 is rotationally driven in the clockwise direction via the transmission belt 15.

The rear pressing mechanism 20 engages with the rear end portion of the photosensitive material W and moves downward along the circumferential direction, that is, in the direction facing the front pressing mechanism 40 side along the circumferential direction of the inner surface of the cylindrical drum. A first pressing member 21 for urging and a second pressing member 22 for urging the vicinity of the rear end portion of the photosensitive material W toward the outer side in the drum radial direction are provided. The first holding member 21 corresponds to the holding means of the present invention, and as shown in FIG. 4, a support member 23 and a plurality of divided claw members 24.
And a spring 25 for urging the claw member 24,
The plurality of claw members 24 engage with the rear end of the photosensitive material W so that the entire surface of the photosensitive material W is uniformly pressed. Further, as shown in FIG. 6, the claw member 24 is formed in a taper shape that spreads toward the front so that it can be reliably engaged even when the end portion of the photosensitive material W is wavy.

Further, a first guide pin 26 and a second guide pin 27 are provided on both side surfaces of the support member 23, and each guide pin 26, 27 is formed in the frame 8 with a guide hole as shown in FIG. It is penetrated by 8a. One end of a spring 28 is connected to the tip of the first guide pin 26 protruding from the frame 8, and the other end of the spring 28 is connected to a pin 8b attached to the frame 8. By the bias of the spring 28, as shown in FIG. 2, the first pressing member 21 is guided by the guide hole 8a and retracted to the upper position.

The second holding member 22 corresponds to the second holding means of the present invention, and acts on the vicinity of the rear end of the photosensitive material W to hold the holding member 31 to the outside in the radial direction of the drum, and a support for supporting the holding member 31. And a member 32. In addition,
In order to make the biasing force of the second pressing member 22 strong enough to cause slippage between the inner surface 1a and the photosensitive material W when the biasing force of the first pressing member 21 is applied, the pressing member 31 is an elastic body. It is configured.

Slide bars 33 are connected to both ends of the support member 32, and the slide bars 33 are inserted into a pair of guides 8c attached to the frame 8 so as to be slidable in the radial direction of the drum. The rack 34 is fixed to the central portion of the slide bar 33, and as shown in FIG.
A pinion 36 and a driving pulley 37 are interlockingly connected to an output shaft of a second motor 35 provided in the above. Rack 34
The pinion 36 is screwed onto the drive pulley 3
One end of the wire Y is attached to 7. The other end of the wire Y is connected to the second guide pin 2 of the support member 23 via an idler roller 38 rotatably supported by the frame 8.
It is connected to 7. By driving the second motor 35, the slide bar 33 moves via the rack 34 with the rotation of the pinion 36, and the second pressing member 22 moves from the retracted position to the outside in the radial direction of the drum, as shown in FIG. Be moved to. On the other hand, the wire Y is wound with the rotation of the driving pulley 37, and the first pressing member 21 is moved downward from the retracted position in the circumferential direction of the drum while being guided by the guide hole 8a via the idle roller 38.

The cylindrical inner surface scanning recording apparatus of this embodiment is constructed as described above, and the operation of the embodiment apparatus will be described below with reference to FIG. (1) First, as shown in FIG. 7A, each pressing member 2
The photosensitive material W conveyed above the cylindrical drum 1 is transferred to the inner surface 1 of the cylindrical drum 1 by driving the first conveying roller 3 in a state where the 1, 2, 41, 42 are retracted.
Carry it into a. Then, the first motor 13 of the carry-in mechanism 10
Is driven to rotate the carry-in roller 11 clockwise, so that the photosensitive material W is carried to a predetermined position as shown in FIG. 7B. Since the photosensitive material W has a certain degree of rigidity, the photosensitive material W carried into the inner surface 1a tries to return to a flat plate shape, and as shown in FIG. 7B, a gap is formed between the photosensitive material W and the inner surface 1a. Will be retained.

(2) Next, in order to bring the photosensitive material W into close contact with the inner surface 1a, the following operation is performed. The second motors 35 on the carry-in side and the carry-out side are synchronously driven to move the first pressing members 21 and 41 downward from the retracted position in the drum circumferential direction, and the second pressing members 22 and 42 from the retracted position. Move the drum radially outward. That is, the first
By pressing the rear end portion of the photosensitive material W by the pressing member 21 and the front end portion of the photosensitive material W by the first pressing member 41, respectively, as shown in FIG. As indicated by the arrow F, a force acts radially outward, and the photosensitive material W is brought into close contact with the inner surface 1a. At this time, the photosensitive material W is pressed by the second pressing members 22 and 42.
Since the vicinity of both ends of the photosensitive material W is pressed toward the inner surface 1a, the vicinity of both ends of the photosensitive material W does not warp inward due to buckling, and the entire surface of the photosensitive material W can be reliably adhered to the inner surface 1a. Further, as described above, since both ends of the photosensitive material W are pressed by the first pressing members 21 and 41, it is possible to deal with the case where the width size of the photosensitive material W in the axial direction changes.

In this state, the light beam emitted from the light source is scanned on the photosensitive material W via the scanning mirror 7, and a desired image is recorded on the photosensitive material W. Thus, since the photosensitive material W is held in close contact with the inner surface 1a of the cylindrical drum 1, an image without distortion can be recorded on the photosensitive material.

(3) After the desired image is recorded on the photosensitive material W, as shown in FIG.
The photosensitive material W is unloaded from the cylindrical drum 1 by retracting 2, 41 and 42 and driving the unloading mechanism 50.

As described above, each pressing member 21, 22,
The inner surface 1a of the cylindrical drum 1 is covered with the photosensitive material W by 41 and 42.
Since it can be held in close contact with the
The cylindrical drum does not need to have a complicated structure such as a suction unit or a mechanism for sucking, and can have a simple structure. Therefore, the cost required for manufacturing can be reduced.

In the above embodiment, the photosensitive material W is carried in from the carry-in port 1b of the cylindrical drum 1 and carried out from the carry-out port 1c, but the present invention is not limited to this, and for example, As shown in FIG. 8, a path switching mechanism 62 is provided between the carry-in guide rail 60 and the carry-out guide rail 61, and the path switching mechanism 62 is switched to carry in the photosensitive material W from the carry-in port 1b. You may carry it out. Thereby, the retracting mechanism of the first pressing member 41 on the carry-out exit 1c side and the carry-out mechanism 50 can be eliminated, and the configuration can be made simpler.

In the above embodiment, the second pressing member 2
2, 32 urges the vicinity of both ends of the photosensitive material W outward in the radial direction of the drum, but the present invention is not limited to this, and for example, as shown in FIG. The claw shapes of the pressing members 21 and 41 may be changed so that the photosensitive material W is urged outward in the radial direction while being urged downward in the drum circumferential direction only by the first pressing members 21 and 41. Further, as shown in FIG. 9B, the first pressing member 2
You may make it rock | fluctuate 1 and 41 to a drum radial direction outer side. Thereby, the second pressing members 22 and 32 can be eliminated, and the configuration can be further simplified.

[0035]

As is apparent from the above description, according to the first aspect of the present invention, the pressing means holds the photosensitive material in close contact with the inner surface of the cylindrical drum. It can be configured and the cost can be reduced.

According to the second aspect of the present invention, since the end portion of the photosensitive material is engaged with and biased by the plurality of divided claw members, the photosensitive material is brought into close uniform contact with the inner surface of the cylindrical drum without a gap. be able to.

According to the third aspect of the present invention, the photosensitive material is applied to the inner surface of the cylindrical drum by the pressing means while the vicinity of both ends of the photosensitive material is urged outward in the radial direction of the cylindrical drum by the second pressing means. Since it is pressed and adhered,
Both ends of the photosensitive material do not float up from the inner surface of the cylindrical drum, and the photosensitive material can be reliably brought into close contact with the inner surface of the cylindrical drum.

According to the fourth aspect of the present invention, the pressing means presses the photosensitive material against the inner surface of the cylindrical drum, and the claw members swing outward in the radial direction, so that both ends of the photosensitive material do not float up from the inner surface. The photosensitive material can be surely brought into close contact with the inner surface of the cylindrical drum.

According to the fifth aspect of the present invention, since the pressing means is retracted from the conveying path by the retracting mechanism, the photosensitive material can be easily carried into the inner surface of the cylindrical drum.

According to the sixth aspect of the present invention, since the engaging portion of the claw member is formed in a taper shape which is widened toward the front, the claw member can be reliably secured even if both ends of the photosensitive material are wavy. To securely bring the photosensitive material into close contact with the inner surface of the cylindrical drum.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a cylindrical inner surface scanning recording apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a front pressing mechanism.

3 is a view on arrow A in FIG. 2. FIG.

FIG. 4 is a perspective view of a first pressing member.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a diagram showing an operation of a front pressing mechanism.

FIG. 7 is an operation diagram of the apparatus according to the embodiment.

FIG. 8 is a diagram showing another embodiment.

FIG. 9 is a diagram showing another embodiment.

FIG. 10 is a perspective view showing a schematic configuration of a conventional cylindrical inner surface scanning recording apparatus.

11 is a vertical cross-sectional view of FIG.

[Explanation of symbols]

 1 ... Cylindrical drum 1a ... Inner surface 10 ... Carrying-in mechanism 20 ... Front pressing mechanism 40 ... Rear pressing mechanism 21, 41 ... First pressing member 22, 42 ... Second pressing member 50 ... Unloading mechanism W ... Photosensitive material

Claims (6)

[Claims] 1. A cylindrical inner surface scanning recording apparatus for recording an image on the photosensitive material by holding a sheet-shaped photosensitive material on the inner surface of a cylindrical drum and scanning a light beam from the center of the cylinder onto the photosensitive material. The cylindrical drum has an opening for loading and unloading the photosensitive material, a portion of which in the circumferential direction is opened along the axial direction, and among the end portions of the photosensitive material loaded into the inner surface of the cylindrical drum. , A pair of claw members engaging with both ends protruding from the opening, and at least one claw member of the pair of claw members are urged in a direction facing each other along the circumferential direction of the inner surface of the cylindrical drum. A cylindrical inner surface scanning recording apparatus comprising: a pressing unit; 2. The cylindrical inner surface scanning recording apparatus according to claim 1, wherein each of the pair of claw members is separated into a plurality along the axial direction of the cylindrical drum. 3. The apparatus according to claim 1, further comprising a second pressing unit which acts on both ends of the photosensitive member engaging with the claw member and urges the cylindrical drum outward in the radial direction. A cylindrical inner surface scanning recording device provided. 4. The cylindrical inner surface scanning recording apparatus according to claim 1, wherein the at least one claw member swings outward in a radial direction of the cylindrical drum. 5. The cylindrical inner surface scanning recording apparatus according to claim 1, further comprising a retracting mechanism that retracts the claw member on the carry-in side of the opening from the transport path. 6. The cylindrical inner surface scanning recording apparatus according to claim 1, wherein the engaging portions of the pair of claw members are formed in a taper shape that is widened toward the front.