JP2649960B2 - Medium guide mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding a medium guide mechanism for accurately setting roll-shaped photosensitive materials of various sizes used in a film printer or the like to a hopper, the photosensitive material is movable even if the width of the photosensitive material varies. Aiming at the appropriate setting of the sensible material while keeping the gap between the guides, provided with a locking surface for positioning one side end of roll-shaped media of various sizes set and used in the hopper. A fixed guide, a movable guide opposed to the fixed guide and movable in a direction perpendicular to the locking surface, and a first locking portion,
A lock member rotatably supported by the movable guide,
When the movable guide is brought into contact with the other side end of the various media set with one side end locked to the locking surface and the lock member is rotated, the first engagement portion is formed. And a fixed positioning member having a plurality of second engaging portions for engaging and positioning the movable guide at positions suitable for guiding various media, respectively, and each of the plurality of second engaging portions is And a groove having an inclined surface, and the first engaging portion has an inclined surface engaged with the inclined surface provided in the groove.

[Industrial applications]

The present invention relates to a medium guide mechanism for accurately setting roll-shaped photosensitive materials of various sizes used in a film printer or the like in a hopper.

In the printing industry and the newspaper industry, integrated printing systems have been commercialized by various companies, and conventional printing operations have been greatly streamlined.

As an output device of this integrated system, a device that connects a digital direct plate making machine with high print quality is demanded.

[Conventional technology]

Conventionally, a film printer has been used to satisfy this demand. The outline of the film printer is as follows.

The roll-shaped photosensitive material wound in the photosensitive material box set in the hopper is fed out from the set position, conveyed by a feed roller, and winds a part of the main drum. The portion of the photosensitive material around which the main drum is wound is brought into close contact with the main drum by suction using a pump or the like, and a latent image is formed at this portion. The latent image is formed by, for example, irradiating the laser light with a digital signal corresponding to information by an optical system using laser light. The photosensitive material on which the latent image has been formed is fed by a feed roller into a take-up magazine box mounted on a take-up unit and taken up. The take-up magazine box in which all the photosensitive materials have been wound is taken out of the winding section and transferred to a separately provided developing machine, where the photosensitive materials are developed and fixed.

When the photosensitive material is set in the hopper section, the movable guide for guiding the photosensitive material is located at a predetermined position with respect to various photosensitive material widths.

[Problems to be solved by the invention]

However, there is variation in the width of the photosensitive material, and in the above-described conventional photosensitive material setting method, it is not possible to set the position of the photosensitive material in response to this variation, so that the gap between the photosensitive material and the movable guide is too wide or too narrow. I often did. If the gap is too wide, the skew of the photosensitive material that is fed from the set position and conveyed during use increases, and if the gap is too narrow, the side end of the photosensitive material is bent.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a medium guide mechanism capable of appropriately setting a gap between a light-sensitive material and a movable guide so that a light-sensitive material can be set even if the width of the light-sensitive material varies.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, a fixed guide having a locking surface for positioning one side end of a roll-shaped medium of various sizes used by being set in a hopper portion, A movable guide that is movable in a direction perpendicular to the locking surface; a locking member that includes a first locking portion and is rotatably supported by the movable guide; and one side end of the locking surface. When the movable guide is brought into contact with the other side end of various media set by locking the lock member and the lock member is rotated, the movable guide is engaged with the first engagement portion, and A fixed positioning member having a plurality of second engaging portions for positioning the media at positions suitable for guiding the medium, respectively, and each of the plurality of second engaging portions is formed from a groove having an inclined surface. And a first engagement portion is provided in the groove portion. A structure having an inclined surface that engages the inclined surface.

[Action]

At the time of setting the photosensitive material, one side end of the leading end of the photosensitive material pulled out from the roll state is locked on the locking surface of the fixed guide, and the movable guide is brought into contact with the other side end of the photosensitive material. When the lock member is rotated in a predetermined direction in this state, the first engagement portion provided on the lock member engages with the second engagement portion corresponding to the light-sensitive material, and is movable with the light-sensitive material. The guide gap is set to an appropriate value.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view of the structure of a medium guide mechanism according to the present invention (FIG. 1 (a) is a perspective view, FIG. 1 (b) is a plan view), and FIG. 2 is a side view showing the structure of the medium guide mechanism. FIG. 3 is a front view showing the structure of the fixed positioning means, FIG. 4 is an explanatory view of the operation of the lock member, and FIG. 5 is an explanatory view of a positioning procedure of the feed roller. Prior to description of the medium guide mechanism with reference to the drawings, first, the structure and operation of a film printer to which the present invention is applied will be described with reference to FIG.

FIG. 6 is a schematic diagram for explaining the structure of the film printer. In the drawing, reference numeral 1 denotes a photosensitive material box, 2 denotes a transport system, 3 denotes an optical system using a laser, 4 denotes a take-up magazine box, and 5 denotes each of these members. Cases 6A and 6B that are stored in a light-shielded state are covers provided on the case 5. Sensitive material box 1
The photosensitive material 100 wound in a roll shape is stored so as to be able to be fed out, and is used by being mounted in the hopper 7 using the cover 6A. The transport system 2 includes feed rollers 8 and 9, a main drum 10, and nip rollers 11 and 1 that press against the main drum 10.
2 and feed rollers 8, 9 and main drum 10
Is synchronously driven by the same drive source (not shown) and rotates at the same peripheral speed in the direction of the arrow. Optical system 3
Is provided with a polygon mirror 13 for converting laser light emitted from a laser light source (not shown) into scanning light, an fθ lens 14, and reflection mirrors 15 and 16. The take-up magazine box 4 is detachably mounted on the winding unit 17.

The light-sensitive material (medium) 100 fed from the light-sensitive material box 1 of the hopper 7 is conveyed by the feed roller 8 and set so as to wind a part of the main drum 10.
The portion of the photosensitive material 100 around which the main drum 10 is wound is pressed by the pair of nip rollers 11 and 12 and is brought into close contact with the main drum 10, and a latent image is formed by the optical system 3 at the contact portion. The latent image is formed by a laser beam 1 reflected by the polygon mirror 13 and passing through the fθ lens 14 and reflected by the reflection mirrors 15 and 16.
It is performed by irradiation of 01. Sensitive material 100 with latent image formed
Is fed into the take-up magazine box 4 by the feed roller 9 and wound up. The take-up magazine box 4 whose winding has been completed is taken out of the winding section 17 by opening the cover 6B, and the developing and fixing of the photosensitive material are performed by a separately provided developing machine.

When mounting the photosensitive material 100 together with the photosensitive material box 1 on the hopper 7 of the film printer having such a configuration and operation, the gap between the photosensitive material and the movable guide is formed by the conventional setting method as described above. Could not keep it properly.
The medium guide mechanism of the present invention solves this problem, and the configuration and operation will be described in detail below.

In FIGS. 1 and 2, reference numeral 21 denotes a fixed guide, 22 denotes a movable guide, 23 denotes a lock member, and 24 denotes a fixed positioning member.

The fixed guide 21 includes a locking surface 21 a for positioning one side end of the roll-shaped medium 100 of various sizes used by being set on the hopper 7, and is fixed near the entrance of the transport system 2.

The movable guide 22 is provided to face the fixed guide 21,
It is guided by two guide shafts 25 and 26 provided in parallel and is movable in a direction perpendicular to the locking surface 21a.

The lock member 23 integrally includes a lock plate 28 having a first engagement portion (inclined surface) 27, and is rotatably supported by the distal end of the movable guide 22. Specifically, the lock member 23
Is fixed between the bifurcated portion 22a to the rotatable guide shaft 25 into which the bifurcated portion 22a at the tip of the movable guide 22 fits, and operates the guide shaft 25 by operating a grip 29 fixed to the guide shaft 25. It is designed to rotate by being rotated.

The fixed positioning member 24 is fixed to the position shown in FIGS. 1 and 2 and, as shown in detail in FIG.
Includes _1, 30 _2, 30 _3, 30 ₄ at a predetermined position. The second engagement portion 30 ₁ is for (details of the positioning procedure described later) of the movable guide 22 positioned to the time-sensitive material used in the 254 mm, groove
31 ₁ inclined surface 32 ₁ and the vertical surface 33 formed in _1, 34 ₁ and more constructed as. Similarly, the second engagement portions 30 ₂ , 30 ₃ and 30 ₄ are 279 mm
For positioning the movable guide 22 when using a photosensitive material having a width of 305 mm, 310 mm, and 31 ₂ , 31 ₃ , 31 ₄ are grooves, 32 ₂ , 3
2 _3, 32 ₄ inclined surface 33 _2, 33 _3, 33 ₄ and 34 _2, 34 _3, 34 ₄ is a vertical plane.

The setting of the photosensitive materials of various sizes by the photosensitive material guide mechanism having such a configuration is performed as follows.

At the time of setting the light-sensitive material, the left end of the front end of the light-sensitive material 100 drawn out of the light-sensitive material box attached to the hopper section 7 is set to the first position.
As shown in FIG. 7B, the movable guide 22 is lightly abutted on the right end of the photosensitive material 100 by being locked on the locking surface 21a of the fixed guide 21. At this time, the clip 29 is at the position indicated by the solid line in FIG. 2, and the first engaging portion 27 does not engage with the fixed positioning member 24. When the clip 29 is rotated to the position indicated by the chain line in FIG. 2 in this state, the guide shaft 25 is rotated by the same amount in the counterclockwise direction in FIG. (a) and (b) (FIG. 4 (a) is a side view, FIG. 4 (b) is a plan view), as shown in detail in FIG.
The lock member 23 moves downward in FIG. 4 (b) (to the right in FIG. 1). At the end of the rotation of the grip 29, the lock plate 28 moves to the position indicated by the dashed line and is held between the opposed vertical surfaces, and the movable guide 22 is positioned at the position indicated by the dashed line suitable for guiding the photosensitive material 100. Is positioned. Incidentally, FIG. 4 shows a case of photosensitive material set of width 254 mm, the first engagement portion 27 and the second engaging portion 30 ₁ and engages the lock plate 28 is a vertical plane 3
It is held between 3 ₁ and 34 ₁ . Similarly, when setting photosensitive materials of other widths, the first engaging portions 27 engage with the corresponding second engaging portions, and the movable guide 22 is positioned at a position suitable for guiding the photosensitive material. Is done. The gap between the movable member 22 positioned in this way and the right end of the photosensitive material is desirably about 2 mm, and the position of each second engagement portion of the fixed positioning member 24 is determined in consideration of the variation in the photosensitive material width. It is set so that the above gap is obtained.

Next, the movement of the feed roller 8 when setting the photosensitive material will be described with reference to FIG.

The feed roller 8 is supported by one end of a cam follower 41 that can move in the directions of arrows A and A ', and a locking pin 42 projects from the other end of the cam follower 41. A cam 44 having a cam surface 43 is fixed to the guide shaft 25 to which the grip 29 is fixed. When the clip 29 is at the position indicated by the solid line, the bottom of the cam surface 43 is engaged with the locking pin 42, the cam follower 41 is positioned at the position indicated by the solid line, and when the grip 29 is positioned at the position indicated by the chain line, By rotating the cam 44 in the clockwise direction together with the rotation of the grip 29, the high portion of the cam surface 43 is engaged with the locking pin 42, and the cam follower 41 is positioned in a chain line state. The solid line state and the chain line state of the grip 29 during this operation correspond to the chain line state and the solid line state in FIG. 2 (the solid line and the chain line are opposite). That is,
When the grip 9 is positioned at the position shown by the solid line in FIG. 2, the cam follower 41 is positioned at the state shown by the chain line in FIG. 5, and the feed roller 8 is separated from the opposing roller 8 'and is moved between the rollers 8, 8'. It is possible to insert the photosensitive material into the camera. When the grip 29 is positioned at the position indicated by the chain line in FIG. 2 (the positioning state of the movable guide 22), the cam follower 41 is positioned.
Are positioned in the state shown by the solid line in FIG. 5, and the feed roller 8 presses the photosensitive material inserted between the feed roller 8 and the opposing roller 8 '. In this state, the set photosensitive material can be transported, and the transported photosensitive material travels without skew because the movable guide 22 is appropriately positioned.
45 is a slot formed in the cam follower 41 to enable the movement of the cam follower 41 in the directions of arrows A and A ', and 46 is a cam.
This is a stopper for restricting the movement of arrow 44 in the direction of arrow A. Thereafter, when the exposure process is completed and the photosensitive material wound up by the winding section is taken out, the grip 29 is positioned at the position shown by the solid line in FIG. Wait for action.

〔The invention's effect〕

As described above, according to the present invention, even if the width of the photosensitive material varies, the photosensitive material can be set while appropriately maintaining a gap between the photosensitive material and the movable guide, and the skew of the photosensitive material is increased. It is possible to carry the paper. Further, the bending of the photosensitive material side end at the time of setting, which has conventionally been a problem, is eliminated.

[Brief description of the drawings]

1 (a) and 1 (b) are explanatory views of the structure of a medium guide mechanism according to an embodiment of the present invention, FIG. 2 is a side view showing the structure of the medium guide mechanism, and FIG. FIGS. 4 (a) and 4 (b) are views for explaining the operation of the lock member, FIG. 5 is a view for explaining the feedback positioning procedure, and FIG. 6 is an embodiment of the present invention. 7 is a side view showing the outline of the structure of the film printer, in which 7 is a hopper, 21 is a fixed guide, 21a is a locking surface, 22 is a movable guide, 23 is a lock member, 24 is a fixed positioning member, and 27 is a first positioning member. engaging portion, 30 _1, 30 _2, 30 _3, 30 ₄ and the second engagement portion, 100 is a photosensitive material (medium).

Claims (1)

(57) [Claims] 1. A fixed guide (21) having an engaging surface (21a) for positioning one side end of roll-shaped media of various sizes used by being set on a hopper section (7); A movable guide (22) that faces the locking surface (21a) and is movable in a direction perpendicular to the locking surface (21a); and a first locking portion (27). The movable guide (22) is brought into contact with the lock member (23) supported by the movable guide (22) by abutting the movable guide (22) against the other side end of various media set by locking one side end to the locking surface (21a). When the lock member (23) is rotated, the plurality of second guides engage with the first engagement portion (27) and position the movable guide (22) at a position suitable for guiding various media. A fixed positioning member (24) provided with an engaging portion (30 ₁ , 30 ₂ , 30 ₃ , 30 ₄ ), and the plurality of second engaging portions (30 ₁ , 30 ₂ , 30 ₃ , 30 ₄ ) each have a groove (31 ₁ , 3 3) having an inclined surface (32 ₁ , 32 ₂ , 32 ₃ , 32 ₄ ).
1 _2, 31 _3, 31 ₄₎ made of, and, the first engagement portion (27) said groove (31 _1, 31 _2, 31 _3, 31 ₄ inclined surface provided on) (32 _1, 3
22. A medium guide mechanism having an inclined surface that engages with ₂ , 32 ₃ , 32 ₄ ).