JPH02256B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conveying device for conveying a sheet-like material such as an original picture or a photosensitive material in an image duplicating device such as a contact printing device.

In conventional image duplicating devices, the photosensitive material is transported by suctioning one end of the photosensitive material with a suction device and moving the suction device forward along the conveyance path while lifting it slightly above the conveyance path. Ta.

However, according to such conventional conveying equipment,
While the photosensitive material is being conveyed, the lower surface of the photosensitive material may be rubbed against the upper surface of the conveyance path and may be damaged.

Furthermore, according to such conventional devices, the direction of conveyance of the photosensitive material is limited to the forward direction with one end of the photosensitive material adsorbed by the suction device being forward, and the photosensitive material is conveyed backward in a hatchback manner. The disadvantage is that it cannot be done.

The present invention aims to eliminate these drawbacks of conventional devices, and involves jetting air between a sheet-like material and its conveying path, and using the ejected air to float the sheet-like material away from the conveying path surface. A conveying device for sheet-like materials in an image duplicating device that eliminates the risk of damage to the sheet-like materials due to friction between the sheet-like materials and the conveyance path, and also makes it possible to reverse feed the sheet-like materials. The purpose is to provide the following.

The explanation will be given below based on the drawings.

The drawings show an embodiment of a contact printing apparatus equipped with the apparatus of the present invention. Fig. 1 is a partially cutaway perspective view of the whole view, and Fig. 2 is a sectional view along the film transport direction. is shown with details omitted to show the overall schematic configuration.

The frame 1 forms a light-tight box-like body, and is divided into two chambers, right and left, by a partition wall 1a, as shown in the second figure.
An opening for attaching and removing the original film is provided on the upper surface of the left chamber, and a lid 3 slides along guide rails 2, 2 provided on the upper and front surfaces of the frame 1 to open and close the opening. When the lid 3 is closed, the frame 1 forms a completely light-tight dark box. 4 is a handle.

A glass frame 5 is installed horizontally in the middle of the left chamber, and a transparent glass plate 6 is placed and fixed on this frame.
An airtight packing 7 is adhered to the peripheral edge of the glass plate 6 all around the circumference, and 1
A pair of register pins 8, 8 are provided upright, and an exhaust pipe 9 is provided at one corner. The exhaust pipe 9 penetrates the glass plate 6 and protrudes from the bottom surface, and is connected to a vacuum pump (not shown) using a rubber tube or the like.

One end of an airtight sheet 11 is fixed to the left edge of the glass frame 5 via a spacer 10, and the other end is wound around a spring roller 12 that reciprocates along the top surface of the glass frame 5. Spring roller 12
and a presser roller 13 arranged parallel to this.
is mounted on a pair of sliding stands 14 that move along a pair of front and rear rails 15, and a spring roller 1
The airtight sheet 11 is tightened with an appropriate tension by the elasticity of a spring built in 2, and the sheet 11 is pressed onto the surface of the glass plate 6 using a presser roller 13.

The sliding table 14 is connected to the sprocket 1 in the frame 1.
6 and 17, and by driving a sprocket 19 provided on the shaft of one sprocket 16 via an endless chain 21 with a motor 20, the two rollers 12, 13 is moved along the surface of the glass plate 6.

On the other hand, in the right chamber of the frame 1, there are disposed devices for feeding the roll film, cutting it, transporting it to the exposure position, and ejecting the exposed film. The film magazine 22 is a light-tight case removably installed in the right chamber, houses a roll film 23 therein, and is provided with a film feed roller 24.

When the magazine 22 is mounted on the frame 1, the feed roller 24 engages with a drive device (not shown) and rotates so as to feed the leading end of the film 23 out of the magazine 22.

The film sent out from the magazine 22 passes through a cutting section guide 25 and a conveyance roller 27,
It is sent along the guide plate 28 to a punching section provided at the right end of the glass frame 5.

The cutting section guide 25 forms cross-shaped slits as shown in the figure, and cuts the film by passing the film through the horizontal slits and passing a cutter 26 driven by a chain through the vertical slits. do.

FIG. 3 is a perspective view showing details of the film feeding and punching section, and FIG. 4 is a plan view of the punching section.

A pair of punching rods 30 are inserted through a punch stand 29 fixed to the right end of the glass frame 5 and urged downward by a spring 31. At the lower end of the punching rod 30, a lever 33 is pivotably supported on a fulcrum 32. The lever 33 is supported by a tip wheel 34, and a solenoid 35 (shown in the second figure)
Rotate the lever 33 to raise the rod 30.

Note that the distance between the pair of punching rods 30 is
The distance between the pair of register pins 8 set up on the glass plate 6 corresponds to the distance between the rods and the register pins, and the corresponding rods and register pins are arranged at positions that are aligned with each other in the film transport direction.

Above the punch stand 29 is a punching rod 3.
A die plate 36 is provided with a pair of dies 37 that engage with the die.

The die plate 36 is provided with notches 38 at a plurality of positions corresponding to the suction cups of a film conveying device 42, which will be described later, and a plurality of flaps 3 made of leaf springs.
9 is installed. Two of the plurality of flaps 39 are installed directly above the die 37, and the remaining flaps are installed in the middle of the notch 38.

Glass frame 5 between punch table 29 and glass plate 6
A spacer 40 is installed on the upper surface of the flap 39, and the tip of the flap 39 is accommodated in a plurality of recesses 41 provided in the spacer 40.

42 in Figures 1 and 2 on the top of frame 1.
A film suction and conveyance device shown as is disposed and is driven back and forth between the punching section and the register pin 8.

FIG. 5 is a front view of the conveying device, and FIGS. 6 to 9 are sectional views of each essential part of the device.

Both ends of the beam 43 are attached to a pair of sliding stands 44 and move along the rails 15. This movement is
Roller 12 for spreading the airtight sheet 11 described above,
13, the sprocket 4 shown in the first diagram
5, 46, endless chain 47, sprocket 48,
It is equipped with a motor 49 and an endless chain 50.

FIG. 6 is a cross-sectional view of the lifting guide provided at two locations on the beam 43. Brackets 51 are protruded from two locations on each of the upper and lower edges of the beam 43, and a guide shaft 52 is vertically fixed thereto. A beam 53 is fitted along the guide shaft 52 so as to be movable up and down.

FIG. 7 is a sectional view of the central part of the beam 43, and the lifting beam 5
A nut 54 is fixedly attached to the beam 43, and is screwed into a screw 55 which is vertically supported on the beam 43. A belt 58 is attached to a pulley 56 fixed to the upper end of the screw 55 and a pulley of a motor 57 installed on the back side of the beam 43, and the motor 57 is driven to rotate the screw 55 and lift the lifting beam 5.
Raise and lower 3.

A pair of presser rods 59 and a plurality of (eight in this embodiment) suction cup rods 63 are inserted into the lifting beam 53 so as to be able to move up and down.

FIG. 8 is a cross-sectional view of the presser bar, in which a spring 61 is disposed between the flange provided near the lower end of the presser bar 59 and the lifting beam 53 to urge the presser bar 59 downward; A restraining pin 60 is inserted into the upper end. A recessed hole 62 is provided at the lower end of the presser bar 59, and this hole has a diameter and depth larger than the dimensions of the register pin 8 so that the register pin 8 can be loosely inserted therein.

FIG. 9 is a cross-sectional view of the suction cup rod. A suction cup rod 63 is urged downward by a spring 64, and a suction cup 65 made of a soft material such as rubber is attached to the lower end, and an intake pipe socket 66 is attached to the upper end.

The devices shown at 67 to 69 in FIG. 9 are air blowing devices for conveying a film to be conveyed, which is a sheet-like material, by floating it away from the upper surface of the glass frame 5 forming the conveyance path, and as shown in FIG. A pipe 68 provided with an appropriate number of nozzles 69 for jetting air between the film to be transported and the glass frame 5 is installed on brackets 67 protruding from both ends of the film.

An air supply pipe 70 is connected to the pipe 68, and air is sent from an air supply source such as a fan (not shown) to the nozzle 6.
The fumes from 9 are blown onto the lower surface of the film adsorbed by the suction cup 65.

Further, a pair of support arms 71 are attached to the upper surface of the beam 43, and are used to open and close a light shielding plate 72 when the transport device 42 moves. As shown in the second figure, the light shielding plate 72 is pivotally attached to the upper cover of the frame 1, and is normally in a hanging position, shielding the right ventricle from external light when the lid 3 is opened.

When the transport device 42 moves above the glass frame 5, the support arm 70 pushes the light shielding plate 71 open.

The right chamber of the frame 1 is further provided with a device for ejecting the exposed film. This includes guide plates 73, 74, conveyance rollers 75, 7
6, guide 77, belt conveyor 78, 79, 8
It is composed of 0 etc.

Reference numeral 81 denotes a light-shielding cover (bellows) that connects the developing processing device (not shown) and the main printing device.

Next, the operation of each of the above-mentioned devices when performing contact printing of a film using the device of this embodiment will be explained in order with reference to FIGS. 10 to 15.

First, the film magazine 22 loaded with the roll film 23 having the required width is attached to a predetermined position in the right interior of the frame 1. On the other hand, a pair of pin holes that fit the register pins 8 erected on the glass plate 6 are machined at required locations on the original film 82 .

As shown in FIG. 10, the lid 3 is opened, the original film 82 is placed on the glass plate 6, the register pin 8 is fitted into the pin hole to position it, and the lid 3 is closed.

When the apparatus is started in this state, the feed roller 24 and the transport roller 27 inside the film magazine 22 rotate, and the leading edge of the roll film 23 is sent out of the magazine 22 and guided along the guide plate 28 to the position of the punch table 29. It is conveyed and stopped using an appropriate means such as a limit switch.

Next, the solenoid 35 is actuated to push up the punching rod 30 via the swing lever 33, thereby punching a pair of holes in the leading end of the film.

Next, the motor 57 of the film transport device 42 rotates to lower the lifting beam 53 to a position where the suction cup 65 contacts the film. At this time, presser bar 5
9 also descends at the same time. Moreover, the presser bar 59 is a flat spring flap 39 disposed directly above the die 37.
Even if the elevating beam 53 is further lowered, it remains in the position where it abuts against the flap 39.

When the suction cup 65 comes into contact with the film, the socket 6
The vacuum pump connected to 6 is activated to adsorb and hold the film, and the conveying device 42 moves to the left to pass the film under the flap 39 and pull it out. Since the flap 39 is made of a thin leaf spring, it is easily pushed up when the film passes through it, and there is no problem in conveying the film.

Further, the presser bar 59 slides on the upper surface of the flap 39 that it is in contact with, and when it passes the tip of the flap 39, it comes into contact with the punch hole of the film.
Move together.

The conveyance device 42 holds the leading end of the film, moves a required distance, and then stops temporarily. Figure 11 shows
The state at this time is shown.

The temporary stopping position of the conveying device 42 is selected so that the length of the film from the tip of the film being sucked and held to the point where it is cut by the cutter 26 matches the desired size of the film to be printed.

That is, the desired film dimension is "L",
If the distance from the cutting section by the cutter 26 to the leading edge of the film when it is set in the punching section is "l", the conveying device 42 only needs to move by "L-l" and then stop temporarily.

Various means can be applied to move the transport device 42 by "L-l" and temporarily stop it.

For example, if the driving speed of the transport device 42 is constant, a timer may be used to drive the transport device 42 for a time proportional to the amount of "L-l";
During this conveyance, the conveyance roller 27 of the feeding section
Since the rollers 27 also rotate synchronously, the amount of rotation of the rollers 27 may be detected and controlled.

As the latter means, following the roller 27,
A variable resistor whose resistance value changes in proportion to the amount of rotation is installed, while a second variable resistor whose resistance value can be set in accordance with the desired amount of "L-l" is installed separately,
A means for driving the conveying device 42 until the resistance values of the two match each other can be applied.

Needless to say, the timer for setting the amount of movement or the second variable resistor in these means should be installed on an operation panel attached to an appropriate location on the outer surface of the frame 1.

By means such as those described above, the conveyance device 42
If you move by "l" and pause, the cutter 26
is driven along the vertical slit of the cutting section guide 25 to cut the film in the width direction.

After cutting the film, the conveying device 42 moves to the left again and stops at a position where the punched holes in the cut film 83 are aligned directly above the register pins 8.

Then, the motor 57 is started and the lifting beam 53
is lowered, the film 83 is superimposed on the original film 82 mounted on the upper surface of the glass plate 6, and the film 83 is fitted onto the register pin 8. FIG. 12 shows this state.

At this time, since a hole 62 larger than the register pin 8 is provided at the lower end of the presser bar 59, the film 83 is reliably attached to and positioned on the register pin 8. Note that, in order to easily attach the film 83, it is desirable that the upper end of the register pin 8 be chamfered as appropriate.

When the film 83 has been attached, the conveying device 42 stops adsorbing the film, releases the film 83, raises the lifting beam 53 by the motor 57, and retreats toward the right ventricle. At the same time, the spring is released from the left end of the left ventricle. The roller 12 and the presser roller 13 move rightward to spread the airtight sheet 11 on the upper surface of the glass plate 6.

At the same time, the air between the glass plate 6 and the airtight sheet 11 is evacuated from the exhaust pipe 9 by the vacuum pump, and the airtight sheet 11 is successively brought into close contact with the glass plate 6. FIG. 13 shows this state.

By simultaneously stretching and evacuation of the airtight sheet 11, the two films 82 and 83 superimposed on the glass plate 6 are sequentially squeezed by the presser roller 13 from the register pin 8 side. They will be brought into close contact by vacuum pressure,
Reliable adhesion can be quickly achieved.

When the transport device 42 is retracted into the right chamber, the light shielding plate 72 is closed, and the airtight sheet 11 is brought into close contact with the entire area surrounded by the airtight packing 7 of the glass plate 6 under vacuum pressure, the condenser lens installed at the bottom of the frame 1 is removed. A light source 84 equipped with a numeral 85 is turned on and exposes light through the glass plate 6 to print the image on the original film 82 onto the film 83.

In order to ensure the close contact between the two films, if necessary, an appropriate time lag may be set between the end of stretching the airtight sheet 11 and the start of exposure. FIG. 14 shows the state during exposure.

When the exposure for the required time is completed, the vacuum pump stops, the rollers 12 and 13 move to the left while winding up the airtight sheet 11, and at the same time, the conveying device 42 opens the light shielding plate 72 and moves in the same direction. Start. The conveying device 42 moves to a position directly above the register pin 8 and stops, and the motor 57 lowers the lifting beam 53, and the suction cup 65 holds the film 83 by suction.

Next, the motor 57 is reversely rotated to raise the lifting beam 53 and remove the film 83 from the register pin 8. At this time, air is sent from the air pipe 70 and ejected from the nozzle 69 through the pipe 68, and is blown onto the lower surface of the film 83.
3 is floated away from the glass plate 6 and the original film 82. FIG. 15 shows this state.

In this state, when the conveying device 42 is moved to the right, the film 83 is floated and supported by the airflow, so the airtight packing 7 and the spacer 4
0 etc., and is conveyed along the upper surface of the flap 39 whose tip is sunk into the recessed hole 41 of the spacer 40, beyond the die plate 36, and between the guide plates 73 and 74 in the right chamber. sent to.

On the other hand, the roll film is fed out from the film magazine 22 to the punching section in preparation for the next printing, as shown in Figure 15. However, this feeding may be performed at the stage shown in FIG. 12 or 13.

When the conveyance device 42 returns to the starting position, the suction by the suction cup 65 stops and the film 83 is released.

At this time, if the nozzle 69 continues to blow air for a little while, an air bearing is formed between the film 83 and the guide plate 73, and the film 83
slides down smoothly along the inclined guide plate 37 and is held between a pair of transport rollers 75 and 76.

At this stage, after opening the lid 3 and replacing the original film 82, or when performing multiple printings using the same original film, immediately start the apparatus and repeat the above-mentioned steps. Expose the first piece of film.

On the other hand, the exposed film held between conveyor rollers 75 and 76 is conveyed downward by the rollers and placed on a conveyor belt 78 along a guide 77.

As shown in the second diagram, two short conveyor belts 79 and 80 are installed opposite to the belt 78, and first convey the exposed film to the lower left so that the exposed film is sandwiched between the belts 78 and 79. .

Even in the case of the maximum length of film that can be printed with this device, each belt will stop when the end of the film passes through the transport rollers 75 and 76 and is transported downward to the left until the entire film is placed on the belt 78. , the exposed film is then transferred to belts 78 and 8.
0 and ejected out of the aircraft. Needless to say, this discharge section is connected with means for conveying the exposed film to a developing processing device (not shown).

In this example, care was taken to use a model with a structure in which the film is fed with the film surface facing upward (for example, the "Log-E-Screen Automatic Processing Machine" manufactured by the present applicant) as the subsequent processing device. Therefore, a film conveying means having the structure shown in the figure is shown.

That is, in the apparatus of this embodiment, the light source is placed on the bottom of the frame and the film is exposed from below, so the film is loaded with the surface facing downward during exposure.
It is equipped with a switchback type conveyance device as shown in the figure.

Therefore, if the subsequent developing processing device is of a type that feeds the film with the film surface facing downward, it goes without saying that it is sufficient to send the film out of the machine from the guide plate 73 in that position.

Furthermore, in the above embodiment, air is ejected from the nozzle 69 only when the film is being fed backwards, and air is not ejected from the nozzle 69 when the film is being moved forward. In this case, air is ejected from the nozzle 69,
By floating the film, it is possible to reduce friction with the transport path and reduce the risk of damage to the film.

As described in detail above, according to the present invention, air is ejected between the sheet-like material and its conveying path, and the ejected air floats the sheet-like material away from the conveying path surface and conveys the sheet-like material. This has the advantage that it is possible to eliminate the risk of damage to the sheet-like material due to rubbing between the material and the conveyance path, and also to enable reverse feeding of the sheet-like material.

Note that the present invention is applicable not only to the transportation of photosensitive materials as described above, but also to the transportation of original images and other sheet-like materials.

[Brief explanation of drawings]

1 is a partially cutaway perspective view showing one embodiment of the present invention, FIG. 2 is a sectional view taken along the film feeding direction, FIG. 3 is a broken perspective view of the film feeding and punching section, and FIG. The figure is a plan view of the punching unit, FIG. 5 is a front view of the film suction conveyance device, FIGS. 6 to 9 are sectional views showing each part of the film conveyance device, and FIGS. 10 to 15 are FIG. 3 is a diagram sequentially showing the operation steps of the embodiment of the present invention. 1... Frame, 1a... Partition wall, 5... Glass frame, 6
...Glass plate, 7...Airtight packing strip, 8...Resistor pin, 9...Exhaust pipe, 10...Spacer, 1
1... Airtight sheet, 12... Spring roller, 1
3... Presser roller, 14... Sliding base, 15... Guide rail, 16, 17... Sprocket, 18... Endless chain, 19... Sprocket, 20... Motor,
21... Endless chain, 22... Film magazine, 2
3...roll film, 24...feeding roller,
25... Cutting section guide, 26... Cutter, 27... Conveyance roller, 28... Guide plate, 29... Punch stand,
30... Punching rod, 31... Spring, 3
3... Swinging lever, 34... Wheel, 35... Solenoid, 36... Die plate, 37... Dice, 39...
Flap, 40... Spacer, 42... Conveyance device,
43... Beam, 44... Sliding base, 45, 46... Sprocket, 47... Endless chain, 48... Sprocket,
49... Motor, 50... Endless chain, 52... Guide, 53... Lifting beam, 54... Nut, 55... Screw,
56... pulley, 57... motor, 59... presser bar,
60...pin, 61...spring, 62...hole, 63
...Sucker rod, 64...Spring, 65...Sucker, 66
...Vacuum pipe socket, 67...Bracket, 68
...Pipe, 69...Nozzle, 70...Air pipe, 71...
Support arm, 72... Light shielding plate, 73, 74... Guide plate, 7
5, 76...Conveyance roller, 77...Guide plate, 7
8, 79, 80... Conveyor belt, 81... Light shielding cover, 82... Original film, 83... Film, 8
4...Light source, 85...Condenser lens.

Claims (1)

[Claims] 1. A suction device that suctions and grips one end of the sheet-like material in a timely manner is provided so as to be movable back and forth along the conveyance path of the sheet-like material, and air is blown between the lower surface of the sheet-like material and the conveyance path. a nozzle is provided so as to be movable together with the suction device, and at least during the period when the suction device moves, air is jetted from the nozzle to the lower surface side of the sheet-like material to float the sheet-like material away from the conveying path surface; 1. A conveying device for sheet-like material in an image duplicating apparatus, characterized in that the sheet-like material can be conveyed in both directions.