JP3739132B2 - Dust intrusion prevention device for automatic guided vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust intrusion prevention device in an automatic guided vehicle that maintains a cleanness level below a set value in a clean room in which the automatic guided vehicle travels.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, automatic guided vehicles traveling in a clean room generate dust from the floor surface due to the contact between the wheel and the floor surface when the traveling wheel rolls and travels in contact with the floor surface. In order to prevent the transported goods and other clean rooms from being contaminated by this dust, clean air is jetted from the ceiling in the clean room toward the floor and exhausted from the exhaust port provided on the floor, especially the road surface of the road. A flow is formed. However, since it is difficult to maintain high cleanliness only with this downflow, the downflow and the transported material storage chamber of the automatic guided vehicle are separated from the transport vehicle lower chamber provided with traveling wheels, etc. A countermeasure is taken to prevent dust from entering the transported material storage chamber by making the material storage chamber an airtight chamber and increasing the internal pressure of the upper airtight chamber.
[0003]
[Problems to be solved by the invention]
In the conventional dust intrusion prevention method in the conventional automatic guided vehicle, airtightness of the airtight chamber is maintained when the transported object is transported, so that a predetermined cleanliness can be maintained. However, if the airtight door of the upper airtight chamber is opened for the transfer work of the transported material, the pressure inside the airtight chamber decreases, and the dust that rises from the floor is generated by the upper airtight chamber. There was a problem that the effect of preventing dust from entering the room was reduced.
[0004]
The present invention solves the problems of the conventional dust intrusion prevention device of the automatic guided vehicle, and an exhaust fan is provided at the lower part of the vehicle body of the automatic guided vehicle to suck the dust generated from the floor surface into the lower airtight chamber so that the traveling path To provide a dust intrusion prevention device for an automatic guided vehicle capable of preventing intrusion into a transported material storage chamber of an upper airtight chamber in which dust is discharged together with a down flow from an exhaust port provided in the vicinity of the air and the dust is positive pressure. With the goal.
[0005]
[Means for Solving the Problems]
To achieve the above object, the dust intrusion preventing device in the automatic guided vehicle of the present invention is to divide the AGV, so that air is not circulated between the two airtight chambers above and below the upper airtight chamber and a lower airtight chamber, upper The airtight chamber is a transported material storage chamber, a fan with a filter is provided on the side wall or ceiling, an openable door is provided on the side, and clean air from a position where dust generated from the floor does not rise by the fan with the filter. Supplying the inside of the upper airtight chamber to keep the inside at a positive pressure, and when the door is open, clean air sucked by the fan with filter is discharged out of the upper airtight chamber from the opening of the door. The drive control device is housed in the lower hermetic chamber, an inflow port is opened in the upper part of the lower hermetic chamber, an exhaust port is formed in the floor of the lower hermetic chamber, an exhaust fan is provided inside, and the exhaust F The dust rising from the floor at emission from the inlet, characterized in that the exhausted toward the exhaust port of the down-flow is formed in the vicinity of the traveling path floor underfloor exhaust port by suction to the lower airtight chamber .
[0006]
In the dust intrusion prevention device in the automatic guided vehicle of the present invention having the above-described configuration, the upper hermetic chamber is always maintained at a positive pressure regardless of opening / closing of the door for storing the transported object, so that generated dust is kept in the upper hermetic chamber. Is not invaded and the cleanliness of the conveyed product is maintained, and there is a drive control device and wheels that easily generate dust in the lower airtight chamber, and the lower airtight chamber has a negative pressure. Since it is sucked to the negative pressure side in the lower hermetic chamber, it does not reach the upper hermetic chamber and does not enter the upper hermetic chamber, so that the cleanliness of the conveyed product is maintained.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a dust intrusion prevention device in an automatic guided vehicle according to the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a plan view showing an automatic guided vehicle during transfer of a conveyed product in the present invention, and FIG. 2 is a front view thereof. In the figure, reference numeral 1 denotes a main body of the automatic guided vehicle. The main body 1 of the automatic guided vehicle is divided into an upper airtight chamber 3 and a lower airtight chamber 10. The upper airtight chamber 3 serves as a transported material storage chamber, has a predetermined volume, accommodates the cassette 2 therein, is provided with a fan 4 with a filter on the side wall or ceiling, and an openable door 6 on the side surface. , 7 so that clean air from a position where dust generated from the floor surface does not rise by driving the fan 4 with filter is supplied into the upper hermetic chamber to keep the inside at a positive pressure.
[0009]
Further, in the lower hermetic chamber 10 of the automatic guided vehicle 1, a drive control device that easily generates dust, such as the traveling wheel W, the drive device D, and the control device C, is housed. While maintaining airtightness, inflow ports 14 and 15 are opened at the upper part of the lower hermetic chamber, an exhaust port 16 is formed on the floor surface of the lower hermetic chamber, and an exhaust fan 11 is provided inside. The exhaust fan 11 is exhausted toward a downflow exhaust port formed in the vicinity of the traveling path of the floor surface 8. As a result, the lower hermetic chamber inside the lower part of the vehicle body has a negative pressure, and dust rising from the floor is sucked into the lower hermetic chamber from the inlets 14 and 15 and discharged from the exhaust port 16 under the floor. For this reason, it is possible to prevent dust from entering the hermetic chamber.
[0010]
Therefore, in the dust intrusion prevention device in the automatic guided vehicle configured as described above, when the doors 6 and 7 of the upper hermetic chamber of the automatic guided vehicle are opened in order to transfer the cassette 2, suction is performed by a fan with a filter that is always driven. The clean air thus discharged is discharged out of the hermetic chamber through the opening where the door is opened. Even when the cassette is transferred, the exhaust fan constantly driven in the lower hermetic chamber keeps the negative pressure in the chamber, so that the dust generated is sucked from the inlet located below the fan with the filter, and goes down the floor. Since it is exhausted, dust is exhausted below the floor without scattering and does not flow into the upper airtight chamber.
[0011]
【The invention's effect】
According to the dust intrusion prevention device in the automatic guided vehicle of the present invention, since the upper hermetic chamber is at a positive pressure even during the transfer operation in the automatic guided vehicle, the effect of preventing dust from entering the chamber is obtained. is there.
In addition, the lower airtight chamber sucks dust from the drive unit at the bottom of the carriage and exhausts it under the floor so that it is exhausted to the bottom of the floor without being scattered. can do.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a dust intrusion prevention device in an automatic guided vehicle according to the present invention.
FIG. 2 is a front view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Automatic guided vehicle 2 Cassette 3 Upper airtight chamber 4 Fan with filter 5 Clean air 6 Door 7 Door 8 Traveling floor 9 Dust 10 Lower airtight chamber 11 Exhaust fan 12 Cover 13 Cover 14 Inlet 15 Inlet 16 Underfloor exhaust

Claims (1)

The automatic guided vehicle is divided above and below the upper and lower hermetic chambers so that air does not flow between the two hermetic chambers , the upper hermetic chamber is used as a transported material storage chamber, and a fan with a filter is provided on the side wall or ceiling. Is provided with an openable / closable door, and clean air from a position where dust generated from the floor by the fan with the filter does not rise is supplied to the upper hermetic chamber to keep the inside at a positive pressure, and the door Clean air sucked by the fan with filter is discharged outside the upper hermetic chamber from the opening where the door is opened, and the drive control device is housed in the lower hermetic chamber, and the upper part of the lower hermetic chamber The air inlet is opened, an exhaust port is formed in the floor of the lower hermetic chamber, an exhaust fan is provided inside, and dust rising from the floor is sucked into the lower hermetic chamber from the inlet by the exhaust fan. Exhaust Dust intrusion preventing device in the automatic guided vehicle, characterized in that the exhausted toward the exhaust port of the down-flow is formed in the vicinity of the traveling path floor surface from.

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