JPS5835530A - photo printing equipment - Google Patents

Abstract

PURPOSE:To continue an exposure work after release of an abnormality, by storing the amount of exposure existing before the extinguishment of a lamp due to the occurrence of the abnormality. CONSTITUTION:When an exposure start signal is inputted to a port C, a transistor TR 5c is made conductive by the output from a port A, and a solenoid 4a is operated to operate a switch 4, and a lamp 1 is lit. The lighting time of the lamp 1 is counted in a CPU 5a. If an abnormality occurs to input an abnormality signal to a port B, the output of the port A is inverted, and the switch 4 is opened to extinguish the lamp 1. After the abnormal signal is released, the lamp 1 is lit again, and printing is continued on a basis of the stored exposure time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photoprinting apparatus, such as a photolithography apparatus or a bright room printer, which requires setting of a time limit for light irradiation to an eye or a lumen.

Conventionally, photo Xll! As a light source for plate devices, bright room printers, etc.■! D light sources are becoming more common, and ultraviolet light is being used more frequently.

However, the general KHID light @ starts up with 1 light on,
Since the relighting characteristics are poor, the irradiation time setting may be increased by opening and closing the shutter while the light source is on.
Alternatively, the light source has been devised to be water-cooled, and it has now been put into practical use. In addition, in recent years, a method of lighting a non-electrical rung using microwaves has been proposed, and this method has good luminous flux start-up characteristics and restart characteristics, and since there are no electrodes, there is no electrical contact consumption and the lamp life is long. It is beginning to be put into practical use by taking advantage of these features.

However, as far as we can see from the above example, even if the position is shifted, the device itself is considerably more complicated in terms of control and safety than a general HID lighting device IF.
In particular, the optical 11I rotation using microwaves'! : Magnetron temperature management, cooling control,! Various control 11IfM is required, including safety, such as microwave leakage.
In any abnormal state Kkn, it is preferable to turn off the electricity.
I can say that.

However, abnormalities during the printing operation result in wasted film due to insufficient printing time, and a solution has been desired.

This invention was made with the aim of eliminating the drawbacks of photographic printing equipment, such as the printing work being interrupted due to abnormalities as typified by the example of the microwave light source device mentioned above, and the resulting waste of film. .

In order to achieve the above objective sound, this invention.

As a control device for the lighting time of the light source, when the irradiation setting time or irradiation amount YrA is used, it is possible to detect abnormalities that occur at the irradiation amount B (A) B) for one hour that is equal to the set time or the irradiation amount B (A) B). Even if the irradiation is cut off by a method such as turning off the light source, there is a time period of "(A-B)". It is something to do.

An embodiment of this invention will be described below with reference to the drawings.

By the way, 111ti HID lamp %A is a light source such as an electrodeless discharge lamp, +21tlj is a lighting control device to turn on this light source, and when the light source (1) is an HID lamp, 11 is a current limiter such as a ballast. It is made up of elements, and in the case of an electrodeless discharge lamp, it is made up of a microwave oscillator. (3) is connected to this lighting control device via a normally open contact 14) which is a control contact;
t5) is the contact 14+? :The lighting time control device has the configuration shown in N211J. In the 29th step, (5a) is a timer counter PiM, for example, an Intel 8-48 series (8048, 8049) microcontroller, and when an abnormal signal from the BK tank is detected, the switch 8W is turned ON and OFF to B)C. A signal is inputted and outputted from port A, and it operates as shown by Rochiard in Figure 1M3. (5b) A resistor II'i whose one end is connected to the microcomputer (5a) O boat, (
5c) the pace is connected to the other end of this resistor (5b),
A transistor whose emitter is grounded, (5d) is connected in a differential column to the relay coil of contact (4), one end is a transistor (5d) cathode, the other end is a diode connected to the source.

In the photographic printing apparatus constructed in this manner.

First, set the film and turn on the switch SW.
The ON signal of the switch 8W is input to port B of the ff icon (5m), the timer built in the microcomputer (5m) starts operating, and output is output to port A. The transistor (5C) is made conductive by the outputs of A>b and the relay coil (4m) is excited, so its normally open contact +41 is closed and the light source 111 is turned on.
A power supply 13 is supplied to the lighting control device (2:). Then, the light from light #) is sealed on the film, and when the timer built in the microcomputer (5a) has elapsed for the set time required to irradiate the film, the light from light # is set to 7 (S-). ] Since there is no output from the output port, the transistor (5C) becomes non-conductive, the relay coil (4a) becomes de-energized, and the normally open contact (4) is opened, cutting off the radiation from the light source ill. It is something.

By the way, if some abnormality occurs before the timer built in the microcomputer (5a) has elapsed for the set time At''-9, for example, as shown in FIG. Since the signal is input, the microcomputer (5m) stops the timer and stops the output from the port.

In this case, the transistor (5c) becomes non-conductive and the relay coil (4m) becomes non-energized, so the normally open contact (4) is opened and the power supply 13) is cut off, ensuring safety. When the abnormality is cleared, the microcomputer (5m)
Boat BKt! Since the abnormal signal is no longer input, the restart outputs an output to the microcomputer (5) and closes the normally open contact (4).

When light is irradiated onto the film again from the light source, the tie i- built into the microcontroller (-) operates.

The remaining time (A-B) is output from the port.

The normally open contact 1) remains closed.

Therefore, there is no need to waste film during printing.

hP, in the above Wm example, the lighting of the light source 41) was controlled based on the irradiation time to the film.

It may be done based on the integral amount of light energy irradiated from the light source (and the connection points of the Fla contact +4) are not limited to those shown in Figure 1, but may be connected to the light source 11) and lighting control device
(2).Furthermore, if an HID lamp is used as the light source, the normally open contact 14) may be closed even after the set time A of the timer of the microcomputer (5a) has elapsed. Leave it alone.

It is also possible to open the normally open contact (41) only in the event of an abnormality.

In addition, when the lighting time control device IILt - normally opens the ri4 contact (4) in the event of an abnormality, the light tube control system and shutter of the light source mountain are stopped, and when the abnormality is cleared, the normally open contact is opened and the shutter is stopped. It is also good to have a shutter that operates.

As described above, the present invention has a light source connected to a power source through a control contact, and is used in a photographic printing apparatus that irradiates light from the light source onto a film. When an abnormality occurs, the control contact 1 is opened, and the LIj irradiation amount for the irradiation time before the abnormality is stored,
After the abnormality is cleared, the irradiation time is at the memorized time, i is the remaining irradiation time based on the irradiation amount, and %A is the remaining irradiation time based on the irradiation amount. This arrangement has the effect of ensuring safety in the event of an abnormality and eliminating waste of film during printing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control device centered on a light source of a photographic printing apparatus showing an embodiment of this invention. 275!0 is a circuit diagram showing the lighting time control device (5) in Fig. 1, - a flowchart showing the operation of the microcomputer (5) in Fig. 3, and the fourth part is the lighting time set to *xi. FIG. 3 is an explanatory diagram of the operation of the control device.

Claims (1)

[Claims] In a photographic printing apparatus that has a light source connected to a power supply through a control contact, and the film is irradiated with light from this light source, when some abnormality occurs in the apparatus while the film is irradiated with light from the light source, the control contact At the same time, the previous irradiation time is memorized and the remaining irradiation time is determined based on the memorized irradiation time or irradiation amount after the abnormality is cleared.
A photographic printing apparatus comprising a lighting time control device at which is adapted to a IIi irradiation device and closes the control contact at least during the period.