JP2755228B2 - Negative carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a negative carrier removably mounted on a mask table of a printer.

[0002]

2. Description of the Related Art In a printer for printing a negative image of a negative film on a photosensitive sheet, a negative carrier is mounted on a mask base, and the negative film is inserted into a film guide groove formed in a negative mask of the negative carrier. The step of performing the exposure operation by elastically pressing the negative film with the negative holding frame and the step of deflecting the negative holding frame after exposure and feeding the negative film by frame after releasing the negative film are repeated. .

Here, since there are several types of negative films having different sizes in the negative film to be baked, a plurality of negative masks corresponding to the film size are prepared in the negative carrier, and the negative film to be baked is prepared. When a negative film of another size is changed, a negative mask is replaced so that a negative film of each size can be printed.

[0004]

In the conventional negative carrier device, a mask case for supporting the negative mask is provided with an openable and closable cover, and the negative mask is replaced by opening the cover. There was an inconvenience that it took time and effort to exchange the.

[0005] It is an object of the present invention to provide a negative carrier in which a negative mask can be easily replaced.

[0006]

In order to solve the above-mentioned problems, the present invention provides a mask case detachably mounted on a mask table and an exposure hole, which is detachably mounted in the mask case. A film insertion hole is formed at a position facing the outer periphery of the mask case, windows for light transmission are provided above and below the mask case, and the upper window is sized so that the negative mask can be attached and detached. A protruding portion is formed at an inner circumferential opposing position, and a guide groove through which the protruding portion can pass is formed on one of the two opposing surfaces on the outer periphery of the negative mask, and a guide groove is formed on one of the other opposing surfaces. A positioning recess is provided, and a positioning groove is formed on the other side, and a tapered surface is provided at a lower portion of the side surface having the positioning groove. First that fits the positioning groove of the negative mask
A positioning projection, and a second positioning projection that fits into the positioning recess when the negative mask moves in a direction in which the position of the guide groove deviates from the projection, and is movably supported toward the second positioning projection, and When the negative mask is inserted, a configuration is adopted in which a pressing member that is pushed back by the tapered surface and retreats and moves forward by the elastic force of the elastic member is provided adjacent to the first positioning projection.

[0007]

In the negative carrier having the above structure, when the negative mask is inserted through the window at the top of the mask case, the first positioning projections are fitted into the positioning grooves of the negative mask, and at the same time, the pushing claws are pushed by the tapered surface of the negative mask and retreated. I do. When the negative mask is completely inserted into the mask case and the release is released, the negative mask is pushed by the pushing claws that advance due to the elasticity of the spring, and the negative mask moves in the moving direction of the pushing claws. The position of the groove is displaced, and at the same time, the positioning recess is fitted into the second positioning projection, so that the negative mask can be attached.

Contrary to the above, it is possible to remove the negative mask from the mask case by placing a finger on the inner periphery of the exposure hole of the negative mask, moving the negative mask in a direction in which the guide groove coincides with the projecting portion, and pulling the negative mask upward. it can.

[0009]

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

As shown in FIGS. 1 to 3, a negative carrier 1 according to the present invention includes a mask case 2 detachably mounted on a mask table 40 and a negative mask 9 detachably mounted in the mask case 2. And

At a position facing the outer periphery of the mask case 2, a film insertion hole 3 for inserting a negative film is formed.
Further, windows 6 and 7 for exposure are formed in the upper plate 4 and the lower plate 5 of the mask case 2. The window 6 of the upper plate 4 has a rectangular shape, and a pair of protruding portions 8 is provided at opposing positions on the inner periphery.

The negative mask 9 is sized so that it can be inserted into and removed from the window 6 of the upper plate 4. Of the two sets of opposing surfaces on the outer periphery, one of the opposing surfaces allows the projection 8 to pass therethrough. Guide grooves 10 and 10 are provided. A positioning groove 11 is formed on one side of the other facing surface, and a positioning recess 12 having a required depth is provided on the other side.
The positioning recess 12 is formed in a V-shape, and its inner surface is inclined outward with respect to the vertical plane.
The shape of 2 is not limited to the illustrated example. Further, a tapered surface 13 is provided below the side surface of the negative mask 9 having the positioning groove 11.

Inside the mask case 2, when the negative mask 9 is inserted through the window 6, a first positioning projection 14 which fits into the positioning groove 11 of the negative mask 9 is provided below the upper plate 4. ing. Also, the positioning protrusion 14
When the negative mask 9 is slid in the horizontal direction in a direction in which the guide groove 10 and the protruding portion 8 are displaced in a state where is fitted in the positioning groove 11, a second positioning protrusion 15 is provided which fits into the positioning recess 12. ing. The second positioning projection 15 is formed of a conical pin. When the second positioning projection 15 is fitted in the positioning recess 12, the first positioning projection 14 is in a state fitted in the positioning groove 11.

A push claw 16 is provided near the mounting position of the first positioning protrusion 14, and a groove 17 into which the protrusion 14 fits is provided at the tip of the push claw 16. A tapered surface 18 is provided on the upper surface of the tip of the push claw 16, and the tapered surface 18 engages with the tapered surface 13 of the negative mask 9 when the negative mask 9 is inserted into the window 6.

The pushing claw 16 is provided on the second positioning projection 1.
A spring 19, which is slidably supported toward 5 and moves the pressing claw 16 toward the second positioning projection 15, is provided on its back.

A film guide groove 20 is formed on the lower surface of the negative mask 9, and an exposure hole 21 is provided above the film guide groove 20. Several types of the negative mask 9 having different sizes of the film guide groove 20 and the exposure hole 21 are prepared, and are used properly according to the size of the negative film.

The negative film F inserted into the film guide groove 20 of the negative mask 9 from the film insertion hole 3 of the mask case 2 is pressed and released from the upper surface of the film guide groove 20 by the pressing mechanism 22.

As shown in FIGS. 3 and 5, the holding mechanism 2
Reference numeral 2 denotes a plurality of pins 23 provided on the lower surface of the negative mask 9, and the support plate 24 supported movably along the pins 23 and prevented from falling off is pressed down by a spring 25 fitted outside the pins 23. . A pin 26 protruding from the upper surface of the support plate 24 movably supports a rectangular holding frame 27 that can be fitted into the film guide groove 20, and a spring 28 fitted outside the pin 26 pushes down the holding frame 27. ing. Further, the lower surface of the support plate 24 is supported in the middle of the arm 29, one end of the arm 29 is swingably supported by a pin 30, and the other end of the arm 29 is moved up and down by a solenoid 31.

With the above configuration, the solenoid 3
When the arm 29 is swung upward by exciting 1, the holding frame 27 rises to press the negative film F against the upper surface of the film guide groove 20, and when the excitation of the solenoid 31 is released,
The support plate 24 is lowered by the elasticity of the spring 25, and at the same time, the presser frame 27 is lowered to release the pressing of the negative film F.

Reference numeral 32 shown in FIG. 4 denotes an exposure hole formed in the support plate 24.

As shown in FIG. 2, a feed roller 33 is provided in a film passage extending from the film insertion hole 3 of the mask case 2 to the film guide groove 20 of the negative mask 9. The feed rollers 33 are arranged vertically and driven by a motor 34 provided at a corner of the mask case 2 to feed the negative film F by frames. The motor 34 has a knob 3
5, the feed roller 33 can be rotated by the rotation of the knob 35.

A flange 36 is provided at the lower part of the outer periphery of the mask case 2, and the dimension between the opposite sides of the flange 36 is equal. A tapered surface 37 is formed on the outer periphery of the upper surface of the flange 36. In addition, a V-shaped projection 38 is provided on each of two opposite sides of the flange 36.

The mask table 4 for supporting the negative carrier 1
A window 41 for a through hole is formed at 0. A pair of guide portions 4 slidably supporting both side portions of the flange 36 in the mask case 2 are provided on the upper surface of the mask base 40.
2 and a positioning member 43 extending between the tips of the guide portions 42
Are provided.

The guide section 42 is provided with a pair of protrusions 44 on both sides of the upper surface of the mask table 40, the upper surface of each protrusion 44 is inclined inward, and the flange 36 is formed on the inclined surface 45. Rollers 46 and 47 that can contact the tapered surface 37
Is installed. Rollers 46, 4 provided at opposing positions
7, one of the rollers 47 is supported at the tip of an arm 48, and the arm 48 is supported swingably about a pin 49 projecting from the upper surface of the protrusion 44. For this reason, the roller 47 is connected to the flange 3 inserted into the guide portion 42.
6 are free to move in the cross direction with respect to the tapered surfaces 37 on both sides, and are deflected inward by the elastic force of the spring 50 applied to the arm 48.

A rail 51 is provided inside each of the projections 44,44.

At one end of the inner surface of the positioning member 43,
Stopper portion 52 for limiting the insertion amount of negative carrier 1
When the negative carrier 1 is inserted to a position where it comes into contact with the stopper portion 52, the projection 38 engages with the roller 47, and the engagement prevents the negative mask main body 1 from coming off.

A male connector 53 is attached to the other end of the inner surface of the positioning member 43, and female connectors 54 that are detachable from the male connector 53 are attached to two locations on the outer periphery of the mask case 2. And female connector 54
Is connected, the solenoid 31 and the motor 34 in the mask case 2 are energized.

The mask table 40 having the above configuration is attached to the printer main body such that the upper surface of the rail 51 is located higher than the upper surface of the outer case 60 of the printer.

The negative carrier device shown in the embodiment has the above-described structure. FIG. 2 shows a state in which the negative film F is fed horizontally. From this state, the negative film F is fed vertically in the right side of FIG. In a state where the negative carrier 1 is pulled out and the negative carrier 1 is removed from the mask table 40, the direction of the negative carrier 1 is changed by 90 °, and the negative carrier 1 is inserted into the guide portions 42 from the side of the pair of guide portions 42. To At this time, the negative carrier 1 is inserted so that the projection 38 faces the roller 47 supported by the arm 48 and the lower surface is supported by the pair of rails 51.

By inserting the negative carrier 1,
The tapered surface 37 is guided by rollers 46 and 47. When the projection 38 faces the roller 47, the arm 48 swings outward, and when the negative carrier 1 is inserted to a position where the negative carrier 1 hits the stopper 52, the arm 48 is moved inward. The roller 47 engages with the projection 38 by swinging in the direction, and the engagement prevents the negative carrier 1 from coming off. The female connector 54 is connected to the male connector 53.

In the above state, the printing operation of the negative film is performed. When the negative film is changed to a negative film having a different size, the negative mask 9 is replaced.

When exchanging the negative mask 9, the exposure holes 2
5, the negative mask 9 is slid in the direction of the pressing claw 16, and the negative mask 9 is pulled up with the projection 8 and the guide groove 10 aligned as shown in FIG. Pass through 6. And a negative mask 9 for replacement
Into the window 6. At this time, as shown in FIG. 5I, the guide groove 10 of the negative mask 9 is aligned with the projecting portion 8 and inserted into the window 6.

When the negative mask 9 is inserted to a position below the upper plate 4 as shown in FIG.
Are fitted to the outside of the first positioning projections 14, and the pressing claws 16 are retracted by the pressing of the tapered surface 18. When the depression is released in this state, the pushing claw 16 advances due to the elasticity of the spring 19, and the negative mask 9 is pushed by the pushing claw 16, and as shown in FIG. 15 and the negative mask 9 is positioned.

[0034]

As described above, according to the present invention, a negative mask is inserted through a window provided at the top of a mask case.
When the negative mask is inserted to a position where it passes through the window, the negative mask is pushed by the push claw that moves by the elasticity of the elastic member, the positioning recess fits into the second positioning projection, and a finger is placed on the inner periphery of the exposure hole of the negative mask. The negative mask can be pulled out of the window by moving the negative mask in the direction in which the push nail retreats and aligning the guide groove with the protruding portion, so that the negative mask can be easily replaced and one-handed. Can be replaced at

When the negative mask is mounted, the projection prevents the negative mask from floating, the first positioning projection engages with the positioning groove, and the positioning recess fits into the second positioning projection. Does not move back and forth, right and left, and a very stable mounting state on the negative mask can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view in a set state of the above.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is an exploded perspective view showing a part of the mask case and a negative mask.

FIGS. 5 (I), (II), and (III) are cross-sectional views showing stepwise mounting states of a negative mask.

[Explanation of symbols]

 Reference Signs List 2 Mask case 3 Film insertion hole 6, 7 Window 8 Projection 9 Negative mask 10 Guide groove 11 Positioning groove 12 Positioning recess 13 Tapered surface 14 First positioning protrusion 15 Second positioning protrusion 16 Push claw 19 Spring 21 Exposure hole 22 Press Mechanism 40 Mask base 42 Guide

Claims (1)

(57) [Claims] 1. A mask case removably mounted on a mask base, and a negative mask having an exposure hole and removably mounted in the mask case, and a film insertion hole at a position facing the outer periphery of the mask case. A window for light transmission is provided above and below the mask case, the upper window is made large enough to allow the negative mask to be attached and detached, and a projection is formed at a position facing the inner periphery of the window, and two sets of the outer periphery of the negative mask are formed. Of the opposing surfaces, one of the opposing surfaces is formed with a guide groove through which the protruding portion can pass, the other opposing surface is provided with a positioning recess on one side, and the other is formed with a positioning groove, A first positioning projection that fits into a positioning groove of the negative mask when the negative mask is inserted through the window into the mask case; A second positioning projection that fits into the positioning recess when the negative mask moves in a direction in which the position of the part shifts, is movably supported toward the second positioning projection, and is pressed by a tapered surface when the negative mask is inserted into the window. A negative carrier, wherein a pressing member which is retracted and advances by elastic force of an elastic member is provided adjacent to the first positioning projection.