JPH0728128A - Optical apparatus accommodating box for all-weather service - Google Patents

Abstract

PURPOSE:To maintain clean the window part of the facade of an accommodation box for optical apparatus even under environment with long time rain/snow precipitation and/or dust/fume existence by furnishing a wiper driving device in which a suction/exhaust device equipped with an automatic dust exhausting mechanism is connected with the end of a suction nozzle CONSTITUTION:With front window glass 3 of a camera case 2 enclosing an optical apparatus 1, a suction nozzle 5 having a wiper 4 is contacted in such a way as sliding on the surface of the window glass 3, and at the tail of this suction nozzle 5 a suction/exhaust device 6 having automatic dust exhaust mechanism and a nozzle driving device 7 are fixed being mounted on the bottom plate of the camera case 2. The rain, snow, sand, dust, and fumes attached to the window glass 3 are shoved outside of the suction nozzle 5 by a brush furnished at the peripheral edge of the wiper 4, while part of those which have eventually intruded into the nozzle 5 is sucked into a hollow arm 4a, and the portion attached to the window glass 3 is wiped away by the wiper 4, and if slipped off from the window glass 3, it is sucked into the hollow arm 4a. This ensures that the window glass 3 is with less contamination and/or flaws.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an all-weather optical device storage box for storing optical devices such as industrial television cameras and optoelectronic switches used in steelworks and chemical plants.

[0002]

2. Description of the Related Art As a conventional optical equipment storage box for all weather,
It is generally known that a box containing an optical device such as an industrial television camera has a wiper on the front window portion, and a wiper drive device is provided at the upper or lower part of the box. By the wiper drive device, the wiper having a rubber piece or the like is agitated and reciprocates to remove the dirt attached to the front window portion.

[0003]

In the case of the conventional optical equipment storage box, the rain, snow, sand dust, dust or the like adhering to the front window portion of the optical equipment storage box is removed only by driving the wiper, so that a long time is required. When exposed to heavy snowfall or a chronic dust environment, the snow and dust removed by the wiper adheres and accumulates on the side of the front window of the storage box, obstructing the view of the optical equipment and degrading the accuracy of the optical equipment. May lead to Further, when hard dust adheres, the agitator of the wiper may scratch the front window portion of the storage box, resulting in a decrease in accuracy of the optical device.

An object of the present invention is to improve the problems of the conventional optical equipment storage box as described above. For more details,
The purpose is to keep the front window part 3 of the storage box clean even in a long-time rainy snow or dust environment.

[0005]

An all-weather optical device storage box according to the present invention includes a wiper (4) on a front window plate (3) of a box (2) containing an optical device (1) such as an industrial television camera. ) Is provided, an intake / exhaust device (6) having an automatic dust discharge mechanism is connected to the end of the intake nozzle (5), and a wiper drive device (7) is provided.

[0006]

Operation: The wiper drive device (7) is used to wipe the wiper (4).
Is driven to clean the front window plate (3),
The suction nozzle (5) sucks dust and the like generated at this time.
The sucked dust and the like is sucked into the suction / exhaust device (6) and discharged to the outside by the automatic dust discharging mechanism.

[0007]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a cutaway view of the case 2 of the optical device storage box. Optical device 1
A camera case 2 that encloses (industrial TV camera shown in the figure)
Intake nozzle 5 having wiper 4 on front window glass 3
Is abutted so as to fan along the surface of the window glass 3, and the intake / exhaust device 6 and the nozzle drive device 7 having an automatic dust discharge mechanism at the rear end of the intake nozzle 5 are mounted on the bottom plate of the camera case 2. It is fixed.

FIG. 2 is an enlarged view of the intake nozzle 5 shown in FIG. FIG. 2A shows the appearance of the intake nozzle 5,
(B) is a 2B-2B line cross-sectional view shown in (a). The intake nozzle 5 has an outer peripheral brush 8 that surrounds the wiper 4.
And is fixed to the tip of the hollow arm 4a.

FIG. 3 shows the internal structure of the intake / exhaust device 6 and the nozzle drive device 7. The rear end of the hollow arm 4a is rotatably supported by the intake / exhaust device 6 and opens in the dust collection chamber in the intake / exhaust device 6 surrounded by the dust discharge door 15 and the dust removal filter 12. At the rear end of the intake nozzle 5,
A drive belt 11 is stretched between a pulley (not shown) fixed to the pulley and a pulley (not shown) fixed to the output shaft of the motor 9 with a reducer in the nozzle drive device 7. Has been done. When the output shaft of the motor 9 with reduction gear rotates forward, the hollow arm 4a rotates forward around the rear end of the belt 11 via the belt 11, and when the output shaft of the motor 9 with reduction gear rotates reversely, the hollow arm 4a rotates. 4a reversely rotates, and the intake nozzle 5 reciprocates by agitating by alternately switching between normal rotation and reverse rotation. Thereby, the wiper-4 cleans the front window glass 3.

The dust collection chamber surrounded by the dust discharge door 15 of the intake / exhaust device 6 and the dust removal filter 12 becomes a negative pressure through the dust removal filter 12 by the fan motor 14 rotating the fan 13 in the forward direction. This allows the dust discharge door 15
Is sucked in a direction to close the space between the dust collecting chamber and the outside air, and a negative pressure applied to the hollow arm 4a is applied to the intake nozzle 5,
The air in the intake nozzle 5 is sucked into the dust collection chamber, the dust that is mixed with the air is removed by the dust filter 12 and stays in the dust collection chamber, and the air thus dusted is sucked by the fan 13. -It is discharged to the outside of the space 2. When dust is placed on the dust discharge door 15 and becomes heavier, the dust discharge door 15 rotates clockwise in FIG. 3, whereby the loaded dust slides down and the dust discharge door 15 becomes lighter. It is sucked by negative pressure and rotates counterclockwise to close the dust collection chamber. It should be noted that when the fan 13 is stopped, its own weight is applied, and when the fan 13 is rotated in the reverse direction, a positive pressure due to this is also applied, and the dust discharge door 15 rotates clockwise even if the amount of dust on the dust discharge door 15 is small The dust on the dust discharge door 15 slides down to the outside.

The electric motor 9 with a reduction gear has a built-in limit switch for detecting the upper and lower limit angles for restricting the rotation angle of the output shaft. These limit switches are installed in the electric motor 9 and the fan motor 14. It is connected to an energization control circuit 10 which is composed of a circuit (motor driver) for conducting forward and reverse energization and a controller. In the energization control circuit 10, when the limit switch for detecting the upper limit angle is opened, the forward rotation energization circuit is opened, and the reverse rotation energization circuit energizes the electric motor 9 for reverse rotation. When the limit switch for detecting the lower limit angle is opened, the reverse rotation energization circuit is opened, and the forward rotation energization circuit energizes the electric motor 9 for forward rotation. This causes the intake nozzle 5 to reciprocate. During this reciprocating agitation, the energization control circuit 10 energizes the fan motor 14 for forward rotation.
Dust discharge door 15 of intake / exhaust device 6 and dust removal filter 1
Negative pressure is applied to the dust collection chamber surrounded by 2, the air is sucked by the intake nozzle 5, and the dust discharge door 15 closes the space between the dust collection chamber and the outside while the amount of dust loaded on it is small. ing.

Rain, snow, sand dust or dust adhering to the front window glass 3 of the camera case 2 is first pushed by the brush 8 to the outside of the intake nozzle 5, but a part of that which has entered the nozzle 5 is hollow. What has been sucked into the window 4a and adhered to the window glass 3 is wiped with the wiper 4, and when it falls off the glass 3, it is sucked into the hollow arm 4a. Therefore, when the window glass 3 is little dirty or scratched and the industrial TV camera used in bad weather or dust environment is housed in the case 2 of this embodiment, a captured image with high image quality can be obtained. You can

[0013]

According to the present invention, since the optical device 1 having the wiper portion 4 and the intake nozzle 5 is used, even if the optical device 1 equipped with the all-weather optical device storage box 2 is used in bad weather or dust environment It is possible to effectively prevent dust from adhering to the box front window portion 3, and improve the reliability of the optical device.

[Brief description of drawings]

FIG. 1 is a side view showing a case 2 according to an embodiment of the present invention in a cutaway manner.

2A is an enlarged perspective view showing the appearance of the intake nozzle 5 shown in FIG. 1, and FIG. 2B is an enlarged sectional view taken along line 2B-2B of FIG.

FIG. 3 is an enlarged vertical cross-sectional view showing the internal structures of the intake / exhaust device 6 and the nozzle drive device 7 shown in FIG.

[Explanation of symbols]

1: Optical device 9: Electric motor with reduction gear 2: Camera case 10: Energization control circuit 3: Front window glass 11: Driving belt 4: Wiper 12: Dust filter 5: Intake nozzle 13: Exhaust fan 6: Exhaust / exhaust device 14 : Fan motor 7: Wiper drive device 15: Dust discharge door 8: Brush

Claims (1)

[Claims] 1. An intake nozzle (5) having a wiper (4) is provided on a front window plate (3) of a box (2) accommodating an optical device (1) such as an industrial television camera, and the intake nozzle (5) is provided. 5) An all-weather optical device storage box in which an intake / exhaust device (6) having an automatic dust discharge mechanism is connected to the rear end portion and a wiper drive device (7) is provided.