JP2012202148A - Enclosure for floor opening work in clean room - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an enclosure for floor opening work in a clean room with which safety of work can be ensured by preventing objects from falling into a floor opening and cleanness of a clean room can be maintained.SOLUTION: An enclosure body 11 comprises frame-shaped frame members 21 constituting sides of a rectangular parallelepiped, and five panel members 22 and 23 fixed to the frame members 21 so as to constitute four side faces and a ceiling face of that rectangular parallelepiped. The panel member 23 of a side face is provided while boring an entrance/exit 24 at an upper side. Casters 12 are provided in lower ends of the frame members 21 so as to be moved on a floor surface. A sheet-like opening/closing member 13 is provided in the enclosure body 11 so as to open/close the entrance/exit 24. A lower sheet member 14 is provided in the enclosure body 11 so as to cover a gap between the enclosure body 11 and the floor surface.

Description

  The present invention relates to a floor opening work enclosure for use in a clean room that is used when under floor work is performed from a floor opening in a clean room.

  In general, a clean room that employs an air flow method using a downflow includes a free access floor having a double floor structure in which a floor surface is formed by laying a plurality of floor boards (see, for example, Patent Document 1 or 2). Some floor boards are provided with a plurality of vent holes provided penetrating in the thickness direction. The air that has passed through the filter provided on the ceiling is blown out toward the floor, which is desirable for maintaining cleanliness of the clean room. It is like that. Under the floor, various utility pipes, wiring, ducts, etc. are installed, and their inspection and repair work are frequently performed.

  Conventionally, when performing work such as inspection of piping under the floor, one or more floor boards are removed while taking measures against dust generation so that the operator can move back and forth between the floor and the floor. At this time, as shown in FIG. 4, a barricade is applied around the floor opening 53 using a color cone 51, a cone bar 52, or the like to take measures to prevent the fall from the floor opening 53. It is also conceivable to cover the periphery of the floor opening with a frame or a fence (for example, see Patent Document 3).

Japanese Utility Model Publication No. 1-168843 Japanese Utility Model Publication No. 1-168845 JP-A-8-326330

  In the method of performing barricade with a color cone or the like, or covering with a frame or fence as described in Patent Document 3, there is no cover at the top, so you can drop the tool while working nearby, If there was a load collapse, there was a problem that it was dangerous for an operator working at the floor opening. In addition, when barricade is applied with a color cone or the like, it is not possible to prevent a material rolling on the floor from falling from the floor opening, and there is a similar danger.

  Furthermore, there is a problem that dust accumulated in the underfloor may be rolled up by the underfloor operation and enter the clean room, and the cleanliness of the clean room is lowered. Further, since the downflow airflow concentrates on the floor opening, the downflow airflow substantially perpendicular to the floor surface which is originally desirable for maintaining the cleanliness of the cleanroom may be disturbed, and the cleanroom cleanliness may be reduced.

  The present invention has been made paying attention to such a problem, and it is possible to secure the safety of the work by preventing falling objects to the floor opening, and to maintain the cleanliness of the clean room. Its purpose is to provide an enclosure.

  In order to achieve the above object, a floor opening work enclosure in a clean room according to the present invention is a floor opening work enclosure used in a clean room when working under the floor from the floor opening. An enclosure main body having an entrance and exit on the side surface, and an opening and closing member capable of opening and closing the entrance and exit, and is installed on the floor so as to cover the floor opening with a gap between the floor of the clean room and And a lower sheet material provided to cover the gap in the enclosure body.

  Since the enclosure for floor opening work in the clean room according to the present invention covers the floor opening by the enclosure main body, it can prevent the rolling of the floor surface from falling to the floor opening and can safely perform the underfloor work. . Further, even when dust is rolled up by underfloor work, it is possible to prevent the dust from scattering into the clean room and to maintain cleanliness of the clean room.

  In the clean room inner floor opening work enclosure according to the present invention, a display for alerting may be provided on a side surface or an upper surface of the enclosure main body. The opening / closing member may be composed of a curtain-like sheet or a door. The enclosure main body, the opening / closing member and the lower sheet material are preferably made of an antistatic material so that dust is not brought into or scattered in the clean room. The enclosure body and the opening / closing member are preferably transparent or translucent so that the working state inside the enclosure body can be visually confirmed from the outside.

  In the clean room inner floor opening work enclosure according to the present invention, the enclosure main body is fixed to each frame material so as to constitute a frame-like frame material that constitutes a side of the rectangular parallelepiped, and four side surfaces and a ceiling surface of the rectangular parallelepiped. The panel material that constitutes one of the side surfaces of the panel material is provided with the doorway opened on the upper side, the opening and closing member is in the form of a sheet, and is formed above the doorway. It is preferable that it is attached.

  In this case, the enclosure body can be assembled by fixing the panel material to each frame material, and can be disassembled by removing the panel material from each frame material, so that the enclosure body can be easily assembled and disassembled. . For this reason, it can be assembled when it is used, and disassembled when it is not used to save storage space. When a general-purpose material is used as each frame material or each panel material, the material cost can be reduced. Each frame material and each panel material is preferably made of resin or metal that does not generate dust when assembled. In this case, the enclosure body can be assembled while maintaining the cleanliness even in the clean room. The sheet-like opening / closing member can be easily attached and can easily enter and exit from the entrance. The sheet-like opening / closing member and the lower sheet material are preferably made of a transparent antistatic vinyl sheet.

The clean room floor opening work enclosure according to the present invention has a plurality of casters movable on the floor surface at the lower end of the frame material, and the floor surface has a plurality of ventilation holes for forming an air flow in the clean room. Preferably, the lower sheet material covers the gap by forming a gap for ventilation having an area equivalent to the total area of the vent holes of the floor covered by the enclosure main body with the floor.
In this case, it can be easily moved by each caster. Each caster is preferably provided with a stopper so as not to move during the operation.

  Since the lower sheet material forms a ventilation gap between the floor surface and the floor surface, which is equivalent to the total area of the floor ventilation holes covered by the enclosure body, it passes through the ventilation holes on the floor surface before opening the floor opening. The amount of air is equal to the amount of air flowing into the floor opening. For this reason, the disturbance of the airflow of the downflow in a clean room can be suppressed, and the cleanliness of a clean room can be maintained.

  In the clean room inner floor opening work enclosure according to the present invention, the lower sheet material may be provided so that the width of the ventilation gap can be adjusted by moving the enclosure main body up and down. In this case, the lower sheet material is moved up and down to adjust the width of the ventilation gap, and the amount of air passing through the floor vent before opening the floor opening is equal to the amount of air flowing into the floor opening. It can be set easily. For this reason, the disturbance of the downflow airflow in the clean room can be suppressed, and the cleanliness of the clean room can be easily maintained.

  ADVANTAGE OF THE INVENTION According to this invention, the safety | security of work can be ensured by preventing the fallen object to a floor opening, and the clean room floor opening work enclosure which can maintain the cleanliness of a clean room can be provided.

It is the perspective view which notched a part which shows the enclosure for clean floor inner floor opening work | work of embodiment of this invention. It is a perspective view from the angle different from FIG. 1 of the enclosure for floor opening work | work in a clean room shown in FIG. It is the side view which notched a part which shows the use condition of the floor opening work enclosure shown in FIG. It is a perspective view which shows the conventional barricade for fall prevention of the floor opening in a clean room.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a clean room inner floor opening work enclosure according to an embodiment of the present invention.
As shown in FIG. 1 to FIG. 3, the floor opening work enclosure 10 in the clean room is a clean room having a floor surface in which a plurality of floor boards 1 are laid, and the floor board 1 is removed and the work under the floor 2 is performed through the floor opening 3. The enclosure body 11, the four casters 12, the opening / closing member 13, and the lower sheet material 14 are used.

  As shown in FIGS. 1 and 2, the enclosure body 11 includes 15 frame members 21, a plurality of panel members 22, and an opening panel member 23. Each frame member 21 is made of a light-weight steel runner member having a U-shaped cross section, and is assembled in a frame shape that forms a side of a horizontally long rectangular parallelepiped. In each frame member 21, 12 pieces constitute each side of the rectangular parallelepiped, and three pieces are arranged so as to connect intermediate positions of adjacent long sides, and are screwed at respective connection positions.

  Each panel material 22 is made of translucent plastic corrugated cardboard, and is adhered to the frame material 21 with an adhesive tape so as to constitute two side surfaces along the longitudinal direction of the rectangular parallelepiped by each frame material 21, a ceiling surface, and one end surface It is attached. As shown in FIG. 2, the opening panel member 23 is made of translucent plastic corrugated cardboard, and is fixed to the frame member 21 at the lower edge of the other end surface of the rectangular parallelepiped by each frame member 21 with an adhesive tape. The opening panel member 23 is spaced from the frame member 21a at the upper edge so that an operator can go in and out. The enclosure main body 11 has an entrance / exit 24 on the inner side surrounded by the frame material 21 a at the upper edge and the frame materials 21 b at both side edges and the upper edge of the opening panel material 23.

  As shown in FIGS. 1 and 2, each caster 12 is provided at the lower end of each frame material 21. Each caster 12 has a stopper, and is fixed to the frame material 21 so as to support the enclosure main body 11 and to be movable on the floor surface of the clean room. As a result, the enclosure main body 11 surrounds the floor opening 3 formed by removing the floor plate 1 of the clean room with a gap generated by each caster 12 between the floor surface of the clean room and above the floor opening 3. It is configured to cover.

  As shown in FIG. 2, the opening / closing member 13 is made of a transparent antistatic vinyl sheet, and is fixed to the frame material 21 a at the upper edge of the entrance / exit 24 or the panel material 22 constituting the ceiling surface. The opening / closing member 13 hangs down in front of the entrance / exit 24 and is provided so as to cover the entrance / exit 24 so that it can be opened / closed. The opening / closing member 13 can hermetically close the doorway 24 with an adhesive tape.

  As shown in FIGS. 1 and 2, the lower sheet material 14 is made of a transparent antistatic vinyl sheet, and the lower edge portions of the panel materials 22 and the opening panel material 23 that form the side surfaces of the rectangular parallelepiped by the frame materials 21. It is fixed with adhesive tape. The lower sheet material 14 is provided by each caster 12 so as to hang down in front of the gap formed between the surrounding main body 11 and the floor surface and cover the gap. The lower sheet material 14 is preferably fixed with an adhesive tape by adjusting the distance between the lower sheet material 14 and the floor surface. As shown in FIG. 2, a display 25 for alerting can be attached to the outer surface of the panel member 22 of the enclosure body 11.

  The floor board 1 has a plurality of air holes that form an air flow in the clean room. The lower sheet material 14 is formed on the floor surface so as to cover the gap with the floor surface by forming a ventilation gap with the floor plate 1 having an area equivalent to the total area of the ventilation holes of the floor plate 1 covered by the enclosure body 11. It is fixed by adjusting the interval.

  In the specific example shown in FIGS. 1 and 2, the enclosure body 11 has a length of 1820 mm, a width of 910 mm, and a height of 910 mm. Moreover, each floor board 1 is 600 mm square, and can work by entering under the floor 2 by removing three sheets. The underfloor 2 has a height of 80 to 130 cm. However, the numerical value is an illustration and is not limited.

Next, the operation will be described.
As shown in FIG. 3, the floor opening work enclosure 10 in the clean room is used to perform the underfloor work by covering the floor opening 3 with the enclosure body 11. Since the floor opening 3 is covered by the enclosure main body 11, it is possible to prevent an object that has rolled down the floor from falling to the floor opening 3 and to perform the underfloor operation safely. Further, even when dust is rolled up by underfloor work, it is possible to prevent the dust from scattering into the clean room and to maintain cleanliness of the clean room. After the underfloor operation is completed, the dust in the clean suit is removed, and the dust enters the clean room from the entrance / exit 24, thereby preventing the dust from scattering into the clean room. Thus, the clean room inner floor opening work enclosure 10 can maintain the cleanliness of the clean room.

  Since the lower sheet material 14 forms a ventilation gap between the floor surface and an area equivalent to the total area of the ventilation holes of the floor board 1 covered by the enclosure body 11, the ventilation holes on the floor surface before the floor opening 3 is opened. The amount of air passing through the floor is equal to the amount of air flowing into the floor opening 3. For this reason, the disturbance of the airflow of the downflow in a clean room can be suppressed, and the cleanliness of a clean room can be maintained.

  In the clean room floor opening work enclosure 10, the enclosure body 11 is composed of the frame material 21, the panel material 22, and the opening panel material 23. It can be assembled by fixing the panel material 23, and can be disassembled by removing the panel material 22 and the opening panel material 23 from each frame material 21. Each frame member 21 can be assembled and disassembled with screws. For this reason, the enclosure body 11 can be easily assembled and disassembled. For this reason, it can be assembled when it is used, and disassembled when it is not used to save storage space. By using commercially available general-purpose materials as the frame materials 21, the panel materials 22, and the opening panel material 23, the material cost can be reduced.

  Since each frame material 21 is made of iron and each panel material 22 is made of resin, dust is not generated during assembly, unlike paper and wood that generate paper powder and wood powder during assembly. For this reason, the enclosure main body 11 can be assembled while maintaining the cleanliness in the clean room. Further, since the opening / closing member 13 and the lower sheet material 14 are made of an antistatic vinyl sheet, it is possible to prevent dust from being brought into the clean room and scattered without being adsorbed.

  The clean room inner floor opening work enclosure 10 can be easily moved by each caster 12. During operation, the casters 12 can be fixed with stoppers so that they do not move. Moreover, since the enclosure main body 11 is translucent and the opening / closing member 13 is transparent, the working state inside the enclosure main body 11 can be visually confirmed from the outside. Furthermore, since the opening / closing member 13 is transparent, the inside and outside states of the enclosure main body 11 can be visually confirmed, and a person can safely enter and exit.

  The lower sheet material 14 may be provided such that the width of the ventilation gap can be adjusted by moving the enclosure body 11 up and down. The structure which enables the lower sheet material 14 to move up and down is, for example, a rail member fixed to the enclosure body 11 along the vertical direction, and moved to the lower sheet material 14 along the rail member and stopped at an arbitrary position. Possible sliders with stoppers can be fixed.

  In this case, the lower sheet material 14 is moved up and down to adjust the width of the ventilation gap, and the amount of air passing through the ventilation holes on the floor surface before opening the floor opening 3 and the amount of air flowing into the floor opening 3 Can be easily set to be equivalent. For this reason, the disturbance of the downflow airflow in the clean room can be suppressed, and the cleanliness of the clean room can be easily maintained.

DESCRIPTION OF SYMBOLS 1 Floor board 2 Under floor 3 Floor opening 10 Enclosure for floor opening work in clean room 11 Enclosure main body 21 Frame material 22 Panel material 23 Panel material for opening 24 Entrance 12 Caster 13 Opening / closing member 14 Lower sheet material

Claims (4)

A clean room floor opening work enclosure used when working under the floor from the floor opening in the clean room,
An enclosure body having a side surface and a ceiling surface, installed on the floor surface so as to cover the floor opening with a gap between the floor surface of the clean room, and having an entrance on the side surface;
An opening and closing member capable of opening and closing the doorway;
A lower sheet material provided to cover the gap in the enclosure body,
A clean room floor opening work enclosure characterized by comprising: The enclosure main body includes a frame-shaped frame member that forms a side of a rectangular parallelepiped, and five panel members fixed to each frame member so as to form four side surfaces and a ceiling surface of the rectangular parallelepiped, The panel material constituting one of the side surfaces of the material is provided with the opening / closing opening on the upper side, and the opening / closing member is in the form of a sheet and attached to the upper part of the opening / closing port,
The clean room inner floor opening work enclosure according to claim 1 characterized by the above-mentioned. A plurality of casters movable on the floor surface at the lower end of the frame material;
The floor has a plurality of air holes that form an air flow in a clean room,
The lower sheet material covers the gap by forming a gap for ventilation with the floor surface having an area equivalent to the total area of the vent holes on the floor surface covered by the enclosure body,
The enclosure for opening a floor in a clean room according to claim 2 characterized by the above-mentioned. The lower sheet material is provided so that the width of the ventilation gap can be adjusted by moving the enclosure body up and down.
4. The clean room inner floor opening work enclosure according to claim 3 characterized by the above.

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