JPWO2009050808A1 - Clean room dummy grating - Google Patents

Abstract

The present invention provides an apparatus capable of continuously performing work while preventing problems in safety and quality even when the grating at the bottom of an upper working space area of a clean room is opened. A dummy grating for attaching to the bottom of an upper layer work space area of a clean room, and the dummy grating closes an opening formed by opening the grating that forms the bottom of the upper layer work space area. The dummy grating has a hole formed in a side surface thereof, and further includes a hole lid for opening and closing the hole.

Description

  The present invention relates to a dummy grating in a clean room, and more particularly to a dummy grating for attaching to the bottom of an upper working space in a clean room.

  A clean room is a space in which contaminants are kept below a specified value, and work in this space prevents the work subject from being exposed to contaminants, or even if exposed to contaminants, damage is caused. It is a facility that can be minimized. On the other hand, for example, semiconductors are manufactured through many processes, and the quality and yield of semiconductor elements may be reduced by contaminants such as suspended dust, harmful gases, particles, and microorganisms that exist in the surrounding environment during the process. Generally, a semiconductor manufacturing process is performed in a clean room.

  In order to increase the integration density of semiconductors and improve the yield, it is necessary not only to increase the cleanliness of the clean room, but also to restrict the work performed in the clean room such as equipment repair. On the other hand, in addition to the semiconductor manufacturing process described above, the clean room is becoming an indispensable facility that can solve problems caused by pollutants in many fields such as medicine, precision machinery, bio industry, and new material industry.

  The structure of a clean room for semiconductor manufacturing conventionally used will be described with reference to FIG. FIG. 1 is a schematic diagram of a clean room for manufacturing a semiconductor, and a reference numeral 10 in the figure indicates the clean room.

  The clean room 10 includes an upper working space area 20, a lower utility section 30, and a circulation duct 40. In general, the airflow in the clean room 10 is downstream, and therefore air supplied from the air conditioning unit 70 disposed on the ceiling of the work space area flows through the work space area 20 and the utility section 30 and then the circulation duct. The air flows into the air conditioning unit 70 again through 40.

  The air conditioning unit 70 is generally composed of a circulation fan and a filter, and air is forcibly circulated by the air conditioning unit 70. In the work space 20, main equipment 21 for semiconductor manufacturing such as film forming equipment, etching equipment, plasma processing equipment, etc. is arranged, and a utility unit 30 includes a power supply device, a pump, a gas supply device, and a chiller. Auxiliary equipment 31 such as is provided.

  The bottom portion 50 of the work space area 20 has a steel structure, and a plurality of gratings are attached on the bottom portion 50 to cover the entire bottom portion 50. The grating is made of a metal having a strength capable of supporting the semiconductor manufacturing main equipment 21. On the other hand, by providing an auxiliary bottom 60 below the bottom 50, a space is formed between the bottom 50 and the auxiliary bottom 60 through which piping lines such as electricity and gas can pass. Perform piping work or repair work in the space.

  However, when performing piping and repair work in the conventional clean room configured as described above, there are the following problems. That is, at the time of piping work and repair work, the operator opens a part of the grating using a jig or the like, and then performs work between the bottom 50 and the auxiliary bottom 60. At this time, the grating is released. Accidents such as other workers falling or dropping work tools etc. from the opening formed by doing this may also lead to safety accidents and damage to equipment There is. Although measures such as installing a safety fence around the opening where work is done to prevent such an accident were taken, it could not be the fundamental solution. Further, the opening of the grating causes a change in the air flow between the work space area 20 and the utility unit 30. As a result, the cleanliness in the work space area 20 is reduced, or a semiconductor process requiring high accuracy. Cause a problem of adversely affecting

  For example, when an operation is performed by connecting an electric wire or a gas pipe or the like to the upper work space area 20, the grating that closes the opening of the bottom 50 becomes an obstacle in order to perform the operation continuously. As a result, there arises a problem that a part of the bottom 50 has to be opened.

  The present invention has been made in view of the above points, and can continuously work while preventing the safety and quality problems from occurring even when the grating at the bottom of the upper working space area of the clean room is opened. The object is to provide a device.

  In order to achieve the above object, the present invention provides a dummy grating for attaching to the bottom of an upper working space area of a clean room, wherein the dummy grating opens the grating forming the bottom of the upper working space area. The opening formed is closed, and the dummy grating is characterized in that a hole is formed in a side surface thereof and a hole lid for opening and closing the hole.

  According to the present invention, when opening the grating forming the bottom of the upper working space area of the clean room for a temporary reason, the opening formed in the bottom is closed with the dummy grating according to the present invention, It is possible to prevent the work tool from falling and prevent the air flow from being disturbed. Also, since holes are formed in the side surfaces of the dummy grating, electric wires, gas pipes, etc. can be connected through the holes of the dummy grating, and necessary operations can be continuously performed without opening the grating. . Furthermore, since the dummy grating has a hole lid that opens and closes the hole, if it is not necessary to open the hole, the hole is closed with the hole lid, so that work tools fall from the hole to the utility section. Accidents such as can be prevented.

  The dummy grating includes an upper portion including an upper surface portion and a lower portion formed integrally with a lower end of the upper portion, the upper surface portion is a regular square shape, and a step is provided at a boundary portion between the upper portion and the lower portion. It may be done. Thereby, the dummy grating can be easily mounted on the steel structure constituting the bottom of the work space area.

  The hole may have a semicircular shape positioned at the center of the side surface of the dummy grating.

  A storage portion that can store the hole lid may be formed on the upper surface of the dummy grating. The storage part may be a recess having the same shape and depth as the hole lid. Thereby, the hole lid can be easily accommodated.

  A handle may be provided on the upper surface of the dummy grating. This makes it easier to remove the dummy grating.

  The dummy grating may be made of a synthetic resin including polycarbonate. Thereby, a lightweight dummy grating having a sufficient strength can be obtained.

  The upper surface portion of the dummy grating may be the same height as the upper surface portion of the adjacent grating. As a result, the passage of the worker is not disturbed by the attachment of the dummy grating.

  According to the present invention, when opening the grating at the bottom of the upper working space area of the clean room, it is possible to continuously work while closing the opening with dummy grating so as not to cause a safety problem. Can do.

It is the schematic which shows the structure of a clean room. It is a perspective view of the dummy grating concerning this Embodiment. It is explanatory drawing which shows a mode that the dummy grating was installed in the bottom part of the upper layer work space area. It is a longitudinal cross-sectional view which shows a mode that the dummy grating was installed in the bottom part of the upper layer work space area. It is explanatory drawing which shows the mode of the dummy grating when a hole cover obstruct | occludes a hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Clean room 20 Work space area 30 Utility part 50 Bottom part 100 Dummy grating 101 Upper surface part 103 Side part 107 Storage part 110 Upper part 120 Lower part 121 Step 130 Hole 132 Hole cover body G Grating S Steel structure

  Hereinafter, preferred embodiments of the present invention will be described. FIG. 2 is a perspective view of the dummy grating 100 according to the present embodiment. Note that the dummy grating 100 according to the present embodiment has an opening in the bottom 50 as shown in FIG. 3 when a part of the bottom 50 of the upper working space 20 in the clean room 10 shown in FIG. 1 is opened. It is intended to be installed temporarily.

  As shown in FIG. 2, the dummy grating 100 includes an upper part 110 including an upper surface part 101 having a regular square shape and a lower part 120 formed integrally with a lower end of the upper part 110. The upper surface portion 101 of the upper portion 110 has substantially the same area and the same shape as the upper surface portion of the grating provided before opening the bottom portion 50 of the work space 20. As shown in FIG. 4, the upper surface portion 101 has a width that is longer than the length between the steel structures S, S provided in a lattice shape to lock the grating G of the bottom portion 50. The thickness of the upper portion 110 of the dummy grating 100 is such that the upper surface portion 101 has the same height as the upper surface portion of the adjacent grating G.

  The cross section of the lower portion 120 is a regular square shape and has a smaller cross sectional area than the cross section of the upper portion 110 as shown in FIG. 4, and a step 121 is formed at the boundary portion between the upper portion 110 and the lower portion 120 due to the difference in cross sectional area. Has been. The dummy grating 100 can be attached to the bottom 50 by hooking the step 121 to the steel structures S and S exposed at the opening of the bottom 50. The upper part 110 and the lower part 120 of the dummy grating 100 are made of, for example, polycarbonate or a synthetic resin of the same kind.

  A plurality of vent holes 105 are provided in the upper surface portion 101 of the dummy grating 100 as shown in FIG. The vent hole 105 preferably has the same diameter and the same pattern as the vent hole formed in the grating provided before the opening of the bottom portion 50, and has, for example, a hollow cylindrical shape. Air flows through the vent 105 in the vertical direction of the dummy grating 100. Note that the air holes 105 can have any number, shape, diameter, and distribution within a range that does not particularly cause a problem in the air flow.

  As shown in FIG. 2, a hole 130 that penetrates the upper portion 110 and the lower portion 120 is formed in the side surface portion 103 of the dummy grating 100. The hole 130 is located at the center or substantially the center of the side surface portion 103 of the dummy grating 100, and the cross-sectional shape thereof is a semicircular shape. In the hole 130, a step 131 protruding along the inner periphery of the hole 130 is formed on the inner periphery of the hole 130 so that a hole lid for opening and closing the hole 130 described later is accommodated. The step 131 is formed at a boundary portion between the upper part 110 and the lower part 120 of the dummy grating 100. Note that a plurality of holes 130 may be formed in one side surface portion 103, or may be formed in a plurality of side surface portions 103.

  As shown in FIG. 5, the dummy grating 100 further includes a hole lid 132 for opening and closing the hole 130. The hole lid 132 has a plate shape, and the upper surface thereof has substantially the same area as the hole 130 and has the same shape. A vent hole 133 that penetrates the hole lid 132 may be formed on the upper surface of the hole lid 132. When the hole 130 does not need to be opened, the hole lid 132 is locked by the step 131 to close the hole 130. The hole lid 132 is preferably made of the same material as the dummy grating 100, for example, polycarbonate or the same type of synthetic resin.

  On the upper surface portion 101 of the dummy grating 100, a storage portion 107 capable of temporarily storing the hole lid 132 is formed as shown in FIG. The storage portion 107 has the same area as the hole lid 132 and has the same shape. When the hole lid 132 is housed in the housing portion 107, the hole lid body 132 has a thickness such that the housed hole lid body 132 and the upper surface portion 101 of the dummy grating 100 have the same height. That is, the storage portion 107 is formed as a shallow hollow portion having the same shape as the hole lid 132. The storage portion 107 is provided on one side of the upper surface portion 101 in contact with the side surface portion 103 provided with the hole 130 (left side in FIG. 2).

  In addition, a handle portion (not shown) is preferably provided on the upper surface portion 101 of the dummy grating 100.

  The dummy grating 100 according to the present embodiment is configured as described above. For example, when a part of the grating G of the bottom 50 of the upper work space 20 is opened for work, the opening of the bottom 50 is opened. A dummy grating 100 is temporarily installed. When this work needs to be performed by connecting an electric wire or a gas pipe to the upper working space 20, for example, the hole lid 132 is housed in the housing portion 107 as shown in FIG. The pipe P is extended from the hole 130. Further, when the work does not require the provision of such an electric wire or gas pipe P, the work is performed by closing the hole 132 with the hole lid 132 as shown in FIG.

  According to the above embodiment, when opening the grating G constituting the bottom 50 of the upper working space 20 of the clean room 10, the opening formed in the bottom 50 is closed with the dummy grating 100, It is possible to prevent the work tool from dropping and prevent the air flow from being disturbed due to the opening.

  Since the hole 130 is formed in the side surface portion 103 of the dummy grating 100, the electric wire or the gas pipe P can be connected to the upper working space 20 through the hole 130 of the dummy grating 100. Thus, necessary work can be continuously performed without opening the grating G.

  Since the dummy grating 100 has a hole lid 132 that opens and closes the hole 130, when it is not necessary to open the hole 130, the hole 130 is closed by the hole lid 132, so that a work tool or the like is removed from the hole 130. Can be prevented from falling to the lower utility section 30 side. Furthermore, the disturbance of the air flow due to the opening of the hole 130 can be prevented.

  Since the storage portion 107 is formed on the upper surface portion 110 of the dummy grating 100, when the dummy grating 100 is attached and the hole 130 is opened, the hole cover 132 that is no longer needed is stored in the storage portion 107. can do.

  Since the dummy grating 100 is formed with a plurality of vent holes 105, the air flow in the vertical direction between the upper working space 20 and the lower utility section 30 can be more smoothly circulated through the dummy grating 100. Can do.

  Since the upper surface portion 110 of the dummy grating 100 has the same height as the upper surface portion of the adjacent grating G, the passage of the worker is not obstructed by the attachment of the dummy grating.

  Since the step 121 is formed at the boundary portion between the upper part 110 and the lower part 120 of the dummy grating 100, the dummy grating 100 can be easily mounted on the steel structure S exposed at the opening of the bottom part 50.

  Since the dummy grating 100 is made of polycarbonate or a synthetic resin of the same type, the dummy grating 100 has sufficient strength and will not be damaged even if an operator continues to travel on the dummy grating 100. Further, since the polycarbonate and the same type of synthetic resin are lightweight, the opening of the bottom 50 can be easily opened and closed by the dummy grating 100.

  Since the handle is provided on the upper surface portion 101 of the dummy grating 100, the dummy grating 100 can be removed more easily.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be made within the scope of the ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs. For example, the clean room of this embodiment is a clean room for semiconductor manufacturing, but it can also be used in clean rooms used in many fields such as medicine, precision machinery, bio industry, new material industry and the like.

  The present invention is particularly useful for preventing a safety accident caused by the opening of the grating, for example, a crash of an operator or a fall of a work tool when a part of the grating constituting the bottom of the upper working space area in the clean room is opened. Useful.

Claims (8)

A dummy grating for attaching to the bottom of the upper working space area of a clean room,
The dummy grating closes the opening formed by opening the grating that forms the bottom of the upper working space area,
The dummy grating has a hole formed in a side surface portion thereof, and has a hole lid for opening and closing the hole. The dummy grating is composed of an upper part including an upper surface part and a lower part formed integrally with a lower end of the upper part,
The upper surface portion is a regular square shape,
The dummy grating according to claim 1, wherein a step is provided at a boundary portion between the upper part and the lower part. The dummy grating according to claim 2, wherein the hole has a semicircular shape located at a center of a side surface portion of the dummy grating. 2. The dummy grating according to claim 1, wherein a storage portion that can store the hole lid is formed on an upper surface portion of the dummy grating. 3. 5. The dummy grating according to claim 4, wherein the storage portion includes a hollow portion having the same shape and depth as the hole lid. The dummy grating according to claim 1, wherein a handle is provided on an upper surface portion of the dummy grating. The dummy grating according to claim 1, wherein the dummy grating is made of a synthetic resin including polycarbonate. 2. The dummy grating according to claim 1, wherein an upper surface portion of the dummy grating is flush with an upper surface portion of an adjacent grating.

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