JPS6067933A - Storage cassette for original film for automatic exposing machine - Google Patents

Abstract

PURPOSE:To move automatically an optional original film to a take-out position by performing elevation driving control over an original film holder which has the locking part for an original film hanger vertically at equal intervals, along a guide rod. CONSTITUTION:A storage cassette 6 for original films which is provided in front of an exposure part has the original film holder 31 elevated and lowered along a couple of guide rods 29 and 30 provided vertically to a base 28. Plural limit switches 44 are provided near the guide rod 30 along the guide rod 30, and their vertical intervals are equal to the vertical intervals of locking parts 38 for the original film hanger provided to the original film holder 31. Those limit switches 44 are turned on and off with an operating piece 45 fitted to the bracket 31b of the original film holer 31 to move automatically an optical original film to the take-out position.

Description

Detailed Description of the Invention The present invention relates to a document film storage cassette attached to an automatic exposure machine used in the plate-making process of photosensitive printing plates for offset printing or letterpress printing. Conventionally, in order to obtain images by photolithography, a printing plate is placed on a printing plate, an original film is placed on top of the photosensitive layer formed on the upper surface of the printing plate, and exposure is carried out from above in this state. When a negative photosensitive material is used for the photosensitive layer, light is applied only to the photosensitive layer that overlaps with the image area of the original, and this area is cured, and the non-image area that was not exposed to the light is cured. By elution in the post-process, a printing plate with a convex image area and a concave non-image area is obtained. It is necessary to stack the original film on the plate mounting plate, and especially in automatic exposure machines, it is necessary to continuously stack the original film on the plate material on the plate mounting plate.

However, in conventional exposure machines, the work of selecting the original film to be placed on the printing plate is done exclusively by hand. For this reason, the exposure process was extremely inefficient and time consuming, and it was difficult to overlay them at accurate positions.

The present invention was made to improve the problems in the conventional exposure process described above, and by automatically selecting a predetermined original film from among a large number of original films, the process from positioning of the plate material to exposure is performed. To provide a cassette for storing original film for an automatic exposure machine, which allows the process to be carried out without any manual work.

In order to achieve the above object, the original film storage cassette according to the present invention is provided with a vertical guide rod on a base placed near the exposure section of an automatic exposure machine, and the original film holder can be moved up and down on this guide rod. In addition, the document film holder is formed with locking portions for hangers that hold the document film fixed at equal intervals in the vertical direction, and further spaced vertically along the guide rod at intervals equal to the spacing between the locking portions. The gist is that a plurality of spaced-apart limit switches are provided, and the actuation of these limit switches stops the drive device that raises and lowers the holder, thereby positioning the hanger of any document film at a constant height. .

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

FIG. 1 is a front view of an automatic exposure machine that performs exposure using a document film taken out from a document film storage cassette according to the present invention, and FIG. 2 is a plan view of the same automatic exposure machine.

The automatic exposure machine 1 consists of a plate material supply section 2, a plate material transport section 3, and an exposure section 4, and a paper receiving box 5 is provided on the side of the plate material supply section 2.
In addition, in front of the exposure section 4 (see FIG. 2), there are provided storage compartments 6 for storing original film according to the present invention.

The frame 7 of the automatic exposure machine 1 constituting the plate supply section 2
A plate supply lifter 8 is disposed inside the plate supply lifter 8, and a cart 9 can move in and out of the plate supply unit 2 so as to straddle the plate supply lifter 8. A large number of plate materials 10 are stacked on the cart 9 with interleaf sheets interposed therebetween. When the motor 11 fixed to the plate supply lifter 8 is driven, the plate 13 is moved up and down via the gear box 12. And plate 1
3 rises, the plate material 10 gradually rises.

Further, a support plate 1 is provided opposite to the upper side end of the plate material supply section 2.
4.14 are erected, gold paper discharge rollers 15, 15 are installed between these support plates 14.14, and a pair of arms 16.16 are installed at the base of the support plate 14, which are rotated by a cylinder unit (not shown). The lower ends of the arms 16, 16 are pivotally connected, and the upper ends of these arms 16, 16 support a suction device 17. Then, as the arm 16.16 rotates clockwise in FIG. 1, the vacuum pad of the suction device 17 is positioned on the paper, and the arm '16.16 that sucks the gold paper is rotated counterclockwise. The interleaving paper attracted by the movement is inserted between the discharge rollers 15 and 15, and by rotating the discharge rollers 15, 15, the interleaving paper is dropped into the paper receiving box 5.

On the other hand, as shown in FIG. 2, on the upper surface of the frame 7 at the front and back of the automatic exposure section 1 at the upper part of the plate supply section 2, a pair of support plates 17 are provided upright, spaced apart from each other on the left and right. A left-right guide rod 18.18 is installed between the pair of support plates 17.17, and moving members 19.19 are attached to each of the front and rear guide rods 18.18.
19 to guide rod 18.1 by motor 20, 20
8 in the left and right direction. Moving part 19, 19 has a cylinder unit) 21.21
A support plate 22.22 that moves up and down is attached to the support plate 22.22, and a bracket 23 of the support plate 22.22 extending toward the center of the automatic exposure machine 1 is equipped with a vacuum hat 24. ... is installed. Then, the support plate 22 is lowered by the cylinder unit 21, and the plate material 10 from which the interleaf paper has been removed is moved to the vacuum pad 24...
Next, the support plate 22 is raised by the cylinder unit 21, and the motor 20 is driven to move the movable member 19 to the right in FIG. The plate is moved on the conveyor belt 25, and here the suction state is released and the entire plate material 1° is transferred onto the conveyor belt 25. The conveyor belt 25 is caused to run by a motor 26, and the motor 26 stops driving when the plate material 1o comes into contact with a limit switch 27.

As shown in FIG. 3, the details of the original film storage cassette 6 attached to the front of the exposure section 4 are as shown in FIG. An original film holder 31 is attached to. This original film holder 31 has left and right side plates 32
, 32 is passed between the supporting plates 33 to make the whole into a frame shape, and the brackets 34 provided on the side plates 32, 32 are fitted onto the guide rods 29 and 30, and these brackets 34...
- A pipe 35 with a female thread carved on the inner circumferential surface is fixed to one of the containers 34a, and a threaded rod 37 rotated by a motor 36 fixed to the base 28 is screwed into this pipe 35, and the motor 36 By driving the document film holder 31, the original film holder 31 moves up and down along the guide rods 29 and 30.

In addition, left and right side plates 3 constituting the original film holder 31 are provided.
A plurality of locking portions 38 . . . are formed at equal intervals in the vertical direction on each of the locking portions 2 and 32 .

The document film 39 is attached to these locking portions 38...
...is locked. As shown in FIGS. 4 and 5, the original film 39 is constructed by attaching a negative original film 42 to a bar-shaped hanger 4o via a fixing plate 41, and both ends of the hanger 4o are formed into small diameter portions 40a. This small diameter portion 40
a is locked to the locking portion 38. Small diameter portions 40b are also formed at portions slightly inward from both ends of the hanger 4o, and these small diameter portions 40b are gripped by some fingers of a chucking device to be described later.

On the other hand, a support plate 43 is provided in the vicinity of the guide rod 30 in the vertical direction relative to the base 28, and a multi-barrel limit switch 44 is attached to this support plate 43. The spacing between these limit switches 44 is made equal to the spacing between the locking portions 38 .
It can be turned on and off using an operating piece 45 attached to 34b.

That is, in the state shown in FIG.
1, the uppermost original film 39a is taken out by the chucking device, and when exposure is completed in the exposure section 4, the motor 36
is driven to raise the holding body 31. Then, the operating piece 45 attached to the platen 34b separates from the limit switch 44a and rises. When the holder 31 rises further, the operation piece 45 hits the limit switch 44b, stopping the driving of the shimotor 36, and the holding body 31 stops rising. here,
The distance between the limit switch 44... and the locking part 38...
- Since the distance between the original film 3 and the
The second original film 39b is placed in the position where 9a was located.
It reminds me of where it is located. Then, as described above, the document film 39b is taken out from the cassette 6 using the chucking device and exposed.

Next, the structure of the exposure section 4 will be explained. As shown in FIG. The installed pillar 47...
A case 49 containing a built-in light source is attached via guide rods 48 so that it can be raised and lowered freely, and the raising and lowering of the case 49 can be done with a small force by way 49a.

A chucking device 51 for taking out the original film 39 from the cassette 6 is disposed between the vacuum gauge 46 and the case 49, and cylinders on both sides of the vacuum platen 46 are used to raise and lower the chucking device 50. 51, 51
Further, guide plates 52 and 53 are extended from the vacuum surface plate 46 to the upstream and downstream sides, and the upstream guide plate 5
2, a plate material supply roller 54 is provided upstream of the guide plate 5 on the downstream side.
Plate material ejection rollers 55 are provided downstream of the printing plates 3 and 3, respectively. .

As shown in FIGS. 6 to 8, the chucking device 50 is raised and lowered by cylinder units 51 and 51 in front and behind the vacuum surface plate 46 (left and right in FIG. 6). Support plates 56.56 are provided, guide rods 57.57 are installed between both ends of these support plates 56.56, and a moving plate 58 is installed between the guide rods 57.57.
A threaded rod 59 is screwed onto the moving plate 58, and a motor 60 is driven to rotate the threaded rod 59, thereby moving the moving plate 58 back and forth. Further, a chuck portion 61 and a lock piece 62 are attached to the movable plate 58. The chuck portion 61 serves to clamp the small diameter portion 40b of the bunker 40 of the original film 39, and the lock piece 62 has the role of supporting the hanger 40 gripped by the chuck portion 61 from below.

The details of the chuck part 61 are as shown in FIG.
A pair of support plates 63 and 63 are provided protruding forward from the movable plate 58, and a solenoid 64 is fixed to the back surface of the movable plate 58.
．． 63, a pair of fingers 66.66 are slidably fitted onto these rondros 5.65, and a solenoid 64 protrudes in front of the movable plate 58.
The shaft 67 and the finger 66.66 are connected by a link piece 68.
It has a structure that is connected by... When the solenoid 64 is activated to move the shaft 67 in a protruding manner from the state shown in FIG. .66 tip expands. Then, the fingers 66,66 in the expanded state are positioned above and below the hanger small diameter portion 40b of the document film 39, and then the shaft 6γ of the solenoid 64 is caused to perform a retracting motion. Then, the fingers 66.66 close, and the small diameter portion 40 of the hanger 40 is inserted into the hole 69 formed at the tip of the finger 66.66.
Grasp b.

FIG. 10 shows an elevating device To for the original film 39. This elevating device 7o receives the original film 39 pulled out to above the vacuum surface plate 46 by the chucking device 50, and the receiver holds the taken original film 39 in a vacuum position. The original film 39 is held above the plate 46, and once the plate 10 is positioned on the vacuum surface plate 46, the original film 39 is lowered and the plate 10 is
0 and the original film 39 are superimposed. The structure is such that a support plate 7 is placed below the frame 7 of the automatic exposure machine.
1 is fixed, and a movable plate 72 is provided below the support plate 71, and the rod 74 of the Purin Dani Knit 73 fixed to this movable plate 72 is connected to the support plate 71, so that the movable plate 72 is fixed to the support plate 71. The support plate 71 has holes 7.
5 is formed, and a shaft member 76 fixed to the movable plate 72 passes through this hole 75 and projects upward, and this shaft member 76 is held by a bearing 7γ provided on the support plate γ1, and the shaft member 76 is A suction device 78 is attached to the tip, and a vacuum pad 79 for sucking the original film is provided at the tip of the suction device 78.

Next, the overall operation of the automatic exposure machine 1 constructed as described above will be explained below.

First, the cart 9 carrying the plate material 10 is placed into the plate material supply section 2. Next, the arms 16, 16 are rotated to suck the interleaving paper placed on the surface of the plate material 10 by the suction device 17, and the paper is discharged into the gold paper receiving box 5 via the paper discharge row 215. Then, the cylinder unit 21 is actuated to lower the vacuum pad 24, the plate material 10 is adsorbed by the vacuum pad 24, and the moving member 19 is moved to the right (downstream side) in FIG. 2 by driving the motor 20. Move and vacuum pad 24 here
The adsorption state is released and the plate material 10 is transferred to the conveyor belt 2.
5 Move to the top. Plate material 10 transferred onto conveyor belt 25
is conveyed to the downstream side and is carried onto the vacuum surface plate 46 via the supply roller 54.Meanwhile, the following operations are performed in parallel with the above operations. Drive,
With the movable plate 58 moving forward and the fingers 66, 66 of the chuck portion 61 attached to the movable plate 58 being expanded,
Facing the small diameter portion 40b of the hanger 40 of the uppermost original film 39a held by the original film holder 31, the solenoid 64 is actuated to grip the small diameter portions 40b with the fingers 66, 66. Next, the motor 60 rotates in the opposite direction to move the moving plate 58 backward with the chuck section 61 holding the original film 39a.As a result, the original film 39a is pulled out to the vacuum surface plate 46.

Next, the chucking device 50
The document film 39 is lowered by the operation of the vacuum surface plate 46 and the original film 39 is
a is placed, and this original film 39a is moved to the lifting device 70.
It is sucked from below by the vacuum pad 79.

Thereafter, the cylinder unit 73 of the elevating device 70 is operated to move the shaft member 76 and the vacuum pad 7 attached thereto.
At the same time, the cylinder unit 51 is raised.
The chucking device 50 is raised by this operation, and the original film 39a is held at a position above the vacuum surface plate 46.

In such a state, the plate material 10 is transported onto the vacuum surface plate 46 as described above, and after the positioning of the plate material 10 on the vacuum surface plate 46 is completed, the cylinder units 51 and 73 are moved again.
is activated to lower the original film 39a onto the plate material 10, and the plate material 10 and the original film 39a are superimposed. Exposure is performed in this state, and when the exposure is completed, the original film 39a is lifted up by the lifting device 70, and the plate material 10 is sent to the next process by the discharge roller 55. Note that the original film 39a is removed from the original film 39a as described above. It is discharged from the exposure section 4 by means opposite to the above. On the other hand, when the used original film is stored in the storage cassette 6, the second stage original film 39b in the cassette 6 rises to a position where it is gripped by the chuck part 61 in preparation for the next exposure. stand by.

In this way, the exposure process in the plate-making work is performed continuously and automatically.

The above is an example of the implementation of the present invention, and various configurations other than those shown in the drawings may be applied to the configuration other than the original film storage cassette 6. In the embodiment, a case has been described in which the original film 39a held at the top of the original film holder 31 is taken out in order, but the original film can be taken out at any position according to the exposure order, etc. . In short, it is only necessary that the vertical distance between the locking portions of the document film and the vertical distance between the limit switches correspond to each other.

As described above, according to the present invention, the document film holder of the cassette that stores the document film is movable up and down, and the holder is provided with a plurality of locking portions spaced apart at equal intervals in the vertical direction. On the other hand, a plurality of limit switches are provided on the base side of the cassette at intervals equal to the vertical distance of the locking portion, and any one of the original films locked in the locking portion is automatically moved. Since the original film is moved to the take-out position, the conventional method of manually selecting the original film can be eliminated, and the process from supplying the printing plate to exposure can be performed completely automatically. Therefore, the plate-making work is greatly shortened, work efficiency is improved, and many other effects are achieved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an automatic exposure machine that performs exposure using an original film taken out from an original film storage cassette according to the present invention, FIG. 2 is a plan view of the automatic exposure machine, and FIG. 3 is a front view of the automatic exposure machine according to the present invention. A front view of the document film storage cassette, FIG. 4 is an enlarged front and front view of the main parts of the document film, FIG. 5 is a side view of the document film, FIG. 6 is a side view of the chucking device, and FIG.
The figure is a front view of the chucking device, FIG. 8 is a plan view of the chucking device, FIG. 9 is an enlarged side view of the chuck part,
FIG. 0 is a front view of the original film lifting device. In the drawings, 1 is an automatic exposure machine, 2 is a plate supply section, 3 is a plate conveyance section, 4 is an exposure section, 6 is a document film storage cassette,
8 is a plate material lifter, 9 is a trolley, 10 is a plate material, 17 is a suction device for adsorbing slip sheets, 18 is a guide rod, 19 is a moving member, 24 is a vacuum pad for adsorbing plate materials, 25 is a conveyor belt, 28 is a base, 29.30 is a guide rod attached to the base, 31 is a document film holder 34 is a bracket, 38 is a locking portion, 39, 39a, 39b are document films, 44, 44a, 44b are limits switch,
45 is a limit switch operation piece, 46 is a vacuum surface plate, 49
is a case with a built-in light source, 50 is a chucking device, 6
Reference numeral 1 indicates a chuck unit, and 70 indicates an unloading device for original film. Patent Applicant Photopoly Ohka Co., Ltd. Agent Patent Attorney Part 2 1) Reply Part 1 Patent Attorney Kuni Ohashi Guan Patent Attorney Mei Koyama Figure 6 111FvjGO-67933 (8) Procedural Amendment (Own Ship 1. Indication of Incident) Patent Application No. 58-175675 2, Title of the invention: Document film storage cassette for automatic exposure machine 3, Relationship with the case of the person making the amendment Patent: Applicant Photopoly Ohka Co., Ltd. 5, Date of amendment order: Voluntary 6. Subject of amendment Description 7, Contents of amendment

Claims (1)

[Claims] A base installed near the exposure section of an automatic exposure machine, a vertical guide rod attached to this base, and a document film that is attached to this guide rod and moved up and down along the guide rod by a drive device. a holding body; a locking portion of a document film hanger formed to apply force to the holding body at equal intervals in the vertical direction; and a plurality of locking portions of the document film hanger arranged along the guide rod, the locking portions being spaced apart in the vertical direction from each other; 1. A document film storage cassette for an automatic exposure machine, comprising a limit switch for stopping the drive device, the limit switch being equal to the vertical distance between the parts.