JPH08204917A - Facsimile equipment - Google Patents

Abstract

PURPOSE: To shorten the time of about one hour required for ordinary stabilization to the humidity of a low humidity state into about ten minutes by blowing extremely dried compressed air from a semicylindrical drum for sucking and fixing a recording medium. CONSTITUTION: When a control part operates a solenoid valve 62 inside an ejector 61 at the time of sucking a film 5, the compressed air flows toward a nozzle 64 as shown by an arrow (c) and is discharged into the atmosphere. At this time, since the compressed air is passed through the nozzle 64, flowing speed is extremely accelerated and pressure is reduced. Thus, air is sucked out of a connected tube 42, the inside of a groove turns a vacuum state, and the film 5 is sucked and fixed along the inner surface of a drum 2. When the control part operates a solenoid valve 63 inside the ejector 61 at the time of canceling the adsorption of the film 5, the compressed air flows to the tube 42 as shown by an arrow (b) and is blown out of the groove on the inner surface of the drum 2 so that the suction and fixing of the film 5 can be canceled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine of a silver salt recording system which uses a film having an emulsion coated on the light-receiving side as a recording medium and has a function of rapidly stabilizing the humidity in the apparatus. Regarding

[0002]

2. Description of the Prior Art As a first example of the prior art
"Electronic device with dehumidification function" disclosed in Japanese Patent Publication No. 9811
For example, this electronic device has a dew condensation sensor installed in the vicinity of a conveyance mechanism that conveys a document, and has a control unit that controls on / off of a fan according to a change in output voltage from the dew condensation sensor. When the dew condensation sensor detects dew condensation, the fan is operated to blow the outside air into the facsimile apparatus to remove moisture inside the apparatus.

As a second example of the prior art, "paper drying device for facsimile / copier" described in Japanese Utility Model Laid-Open No. 1-117153, the paper drying device includes a humidity sensor and a fan. Equipped with a ventilation path and a control unit that calculates the output of the humidity sensor and controls the fan, monitors the output of the humidity sensor and determines that the internal humidity of the facsimile / copier has exceeded the preset humidity value. Then, the hot air in the heat generating portion inside the facsimile / copier is blown onto the sheet feeding cassette using the air passage and the fan to remove moisture from the sheets in the sheet feeding cassette. .

[0004]

In the first and second examples of the related art, a fan, in particular, hot air is blown to remove moisture of high humidity that causes dew condensation, which will be described below. There is a problem in that it is almost impossible to expect the effect of rapid stabilization of humidity in such a low humidity condition.

Now, the humidity condition inside the facsimile will be described.

Generally, in a facsimile apparatus adopting a silver salt recording system, an image is formed by switching whether or not a laser beam is emitted from a laser diode (LD) to a recording medium (a film having an emulsion coated on the light receiving surface side). Is forming.

Therefore, since the leakage of external light into the inside of the facsimile apparatus is strictly prohibited, the seams of each cover are sealed with a light-shielding sponge.

In such a facsimile machine, when the cover is opened by film exchange or the like, the humidity inside the machine becomes 50 to 5 in the room where the facsimile machine is installed.
The humidity is about the same as about 5% (hereinafter referred to as normal humidity).

When the cover is closed after the film is exchanged, since the inside of the facsimile apparatus is a substantially sealed space as described above, the humidity of about 6% which is constantly supplied to the high speed motor adopting the air spindle as the bearing. Since very dry compressed air is discharged to the mechanical part after passing through the inside of the high speed motor, the humidity inside the facsimile should gradually decrease until it stabilizes at about 20% about 1 hour after the cover is closed. become.

This low humidity state continues until the cover is opened by the next film exchange or the like, and when the cover is opened, it returns to normal humidity immediately.

As described above, the humidity inside the facsimile apparatus fluctuates in the range from normal humidity to 20%.

However, it is known that polyester, which is the base of a recording medium (film), expands and contracts as the humidity changes. Specifically, the rate of change with respect to 1% of humidity is 1.5 × 10 ⁻³ %.

Now, assuming that the humidity change is 30%, the change amount at the time of 1 m drawing which is the maximum drawing size is calculated. Change rate = 1.5 × 10 ⁻³ % × 30 = 0.045% Change amount = 1000 mm x 0.045% = 0.45 mm =
It becomes 450 μm.

That is, when a facsimile image is drawn on a film, the size of the film may differ by up to 450 μm.

Since this film is soaked in the processing liquid and returned to its original size in the course of being processed by the automatic processor, the size of the developed image is the same as the original image even if the same data is drawn. However, there is a serious problem that the image recording accuracy is significantly reduced.

Therefore, an object of the present invention is to blow a very dry compressed air from a semi-cylindrical drum for adsorbing and fixing a recording medium for a certain period of time, and usually it takes 1 hour to stabilize the humidity in a low humidity state. What is required is to provide a facsimile apparatus with a rapid humidity stabilizing function that is shortened and stabilized in about 10 minutes.

[0017]

According to the present invention, a drum having a semicircular cross section having at least one groove machined along the circumferential direction, and at least one drum for each groove are provided. A tube for compressed air piping, an ejector that is connected to this tube and has a built-in solenoid valve that switches the discharge of compressed air to the drum or the suction of air from the drum, and a control that controls the operation of this ejector And a facsimile machine.

Further, a drum having a semicircular cross section for adsorbing and fixing the recording medium along the circumferential direction, a tube for compressed air piping connected to the drum by a connecting component, and the drum through the tube A facsimile machine is provided, which comprises an electromagnetic valve for switching the discharge of compressed air or the suction of air from the drum, and a control unit for controlling the opening and closing of this electromagnetic valve.

[0019]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a mechanical portion including an optical system showing an embodiment of a facsimile apparatus of the present invention, FIG. 2 is a vertical sectional view of FIG. 1, and FIG. 3 is a view for explaining the operation of this embodiment. It is a figure which shows the flow of compressed air.

Referring to FIGS. 1, 2 and 3, in the facsimile apparatus of this embodiment, a high speed motor 3 having an air bearing at the center of a semicircle of a semicylindrical drum 2 is used.
The prism 32 is directly connected to the rotation shaft of the high speed motor 31.

Further, a tube 41 for compressed air piping is attached to the high speed motor 31, and it is very clean and humidity adjusted to a constant pressure by air devices such as a compressor, an air dryer, a regulator and an air filter (not shown). 40% of dry compressed air of about 6%
N liters / minute (N liters / minute: atmospheric pressure release flow rate) is being supplied.

Further, on the inner surface of the drum 2, several grooves having a width of 2 mm and a depth of 2 mm are machined along the circumferential direction. And, in this groove, a hole having a diameter of 3 mm is machined in two places per groove in the thickness direction of the drum 2.
The hole is connected to the tube 42 through a joint,
The tube 42 is connected to the ejector 61.

The pipe through which the compressed air is passed is branched inside the facsimile apparatus. One tube 41 is connected to the high speed motor 31, and the other tube 42 is connected to the ejector 61. Then, normally, the electromagnetic valves 62 and 63 built in the ejector 61 are not operated, so that the compressed air is discharged from the high speed motor 31 to the atmosphere as shown by the arrow a.

Next, the operation at the time of sucking and releasing the film in this embodiment will be described.

First, when a film is adsorbed, a control unit (not shown) (made up of a well-known microprocessor or the like) operates a solenoid valve 62 incorporated in the ejector 61, and compressed air is indicated by an arrow c. Nozzle 6 as shown
It flows in the direction of 4 and is released into the atmosphere.

Here, the compressed air passes through the nozzle 64 to have a very high flow velocity and a pressure drop.

Due to this pressure drop, air is sucked out from the connected tube 42, so that the inside of the groove is in a vacuum state and the film 5 is adsorbed and fixed along the inner surface of the drum 2.

Next, when the suction of the film is released, the control section operates the other electromagnetic valve 63 built in the ejector 61, and the compressed air flows into the tube 42 as indicated by the arrow b, and the drum 2 is moved. Since it is blown out from the groove on the inner surface of the film 5, the suction fixing of the film 5 is released.

In this embodiment, the ejector 61 is used to perform the adsorption and desorption operation of the film.
The same operation can be performed by using the vacuum pump and the solenoid valve without using the ejector.

Next, the operation after the cover is closed will be described.

When it is detected that the cover is closed by a switch (not shown), the leading end of the film 5 is conveyed to the normal standby position by the control unit.

When the sensor (not shown) detects that the film 5 has reached the standby position, the controller operates the solenoid valve 63 to eject the compressed air from each hole of the drum 2.

The compressed air jetted at this time has a flow rate of 120 N liters or more, and the humidity inside the facsimile apparatus rapidly decreases. Therefore, when the solenoid valve 63 is stopped, the humidity is partially reduced to 20%.

The operating time of the solenoid valve 63 is, for example, 4 minutes, and this time is controlled by the timer of the control section.

In this embodiment, the operation of the solenoid valve 63 is stopped 3 times.
After 4 minutes, the humidity inside the facsimile machine becomes 2
It stabilizes at around 0%, so including the time to control the transport of the film 5, the film 5 will be used 10 minutes after the cover is closed.
Can be recorded.

The operating time of the solenoid valve 63 can be changed by changing the value of the timer, but it has been confirmed by experiments that the optimum time is 4 minutes.

As described above, the facsimile apparatus of this embodiment can maintain the drawing performance without changing the existing control parts.

[0039]

As described above, according to the present invention, a drum having a semicircular cross section for adsorbing and fixing a recording medium along the circumferential direction, and a compressed air pipe connected to this drum by a connecting component. By including a tube of, a solenoid valve for switching the discharge of compressed air to the drum or the suction of air from the drum through the tube for compressed air piping, and a control unit for controlling the opening and closing of this solenoid valve,
It is possible to remarkably shorten the time until the inside of the facsimile apparatus is stabilized at a low humidity, and the image recording accuracy is greatly improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a mechanism section including an optical system showing an embodiment of a facsimile apparatus of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a diagram showing a flow of compressed air for explaining the operation of the present embodiment.

[Explanation of symbols]

 1 Optical system 2 Drum 31 High speed motor 32 Prism 41, 42 Tube 5 Film 61 Ejector 62, 63 Solenoid valve 64 Nozzle a Flow of compressed air during normal operation b Flow of compressed air during release of adsorption / air discharge c During adsorption Compressed air flow

Claims (2)

[Claims] 1. A drum having a semicircular cross section for adsorbing and fixing a recording medium along a circumferential direction, a tube for compressed air piping connected to the drum by a connecting component, and a tube for compressed air piping. A facsimile apparatus comprising: a solenoid valve for switching the discharge of compressed air to the drum or the suction of air from the drum through the tube and a control unit for controlling the opening and closing of the solenoid valve. 2. A drum having a semicircular cross section having at least one groove processed along the circumferential direction,
The tube for compressed air piping provided at least one for each said groove, and the ejector which built in the said electromagnetic valve are provided, The said control part controls the operation | movement of the said ejector. Fax machine.