JP6491064B2 - Laboratory - Google Patents

Description

  In the present invention, a sound absorber or a radio wave absorber is installed at least on the bottom wall, and floor materials are arranged in the internal space between the ceiling wall and the bottom wall with a space in the vertical direction from each of the ceiling wall and the bottom wall. Relates to the laboratory.

  An acoustic experiment, a radio wave experiment, or the like may be required to be performed in a laboratory that satisfies a predetermined environmental condition. An example of a laboratory used for an acoustic experiment is an anechoic chamber that can realize a free sound field space substantially free of sound reflection. Sound absorbers are attached to the ceiling wall, the bottom wall, and the side wall that surround the internal space of the anechoic chamber. Generally, the sound absorber is formed in a flat plate shape or has a wedge-shaped sound absorbing wedge or the like, and in particular, a sound absorber having a plurality of sound absorbing wedges is widely used. (For example, see Patent Document 1.)

  However, when a worker, a device, or the like of an acoustic experiment is placed on the sound absorber on the bottom wall, the worker, the device, or the like may not be stably supported. In particular, when the sound absorbing body is formed to have a sound absorbing wedge or the like, the bottom wall is formed in an uneven shape, so that an operator of an acoustic experiment moves the uneven wall in an uneven shape. It is difficult, and furthermore, it is difficult to stably support the apparatus for the acoustic experiment on the uneven bottom wall.

  Therefore, in an anechoic room, floor materials for supporting workers, devices, and the like may be provided at intervals in the vertical direction from the ceiling wall and the bottom wall. In such a flooring, in order to prevent reflection of sound by the flooring, the flooring main body arranged along the horizontal direction is formed in a lattice shape by combining a plurality of wires. In addition, in order to obtain sufficient strength (hereinafter referred to as “support strength”) that can stably support workers, devices, etc. on the floor material, the floor material body includes a plurality of mediums composed of plate materials. An actual frame is attached, and in many cases, a part of the plurality of solid frames is arranged along the periphery of the floor material body and attached to the periphery of the floor material body. Another part of the solid frame is arranged in parallel at the center of the flooring body surrounded by the peripheral edge and is attached to the center of the flooring body. In an anechoic chamber, instead of flooring, a net member having a plurality of wires laid between opposing side walls and arranging the plurality of wires in a lattice shape may be provided.

  As an example of the laboratory used for the radio wave experiment, there is an anechoic chamber configured so as not to be affected by the electromagnetic wave from the outside, to leak the electromagnetic wave to the outside, and to prevent the reflection of the electromagnetic wave in the internal space. A radio wave absorber is attached to the ceiling wall, the bottom wall, and the side wall surrounding the internal space of the anechoic chamber. Generally, the radio wave absorber is formed in a flat plate shape or has a radio wave absorption element such as a pyramid shape or a wedge shape.

  However, when a radio experiment worker, device, or the like is placed on the bottom wall wave absorber, the worker, device, or the like may not be stably supported. In particular, when the radio wave absorber is formed so as to have a radio wave absorption element such as a pyramid shape or a wedge shape, the bottom wall is formed in an uneven shape. In addition, it is difficult to stably support the radio wave experiment apparatus on the uneven bottom wall.

  Therefore, floor materials may be installed in an anechoic chamber in the same manner as in an anechoic chamber.

JP 2010-248756 A

  However, in the above-mentioned flooring material, the solid frame is increased in size in order to obtain support strength, and as a result, the surface area of the solid frame formed of a plate material or the like tends to increase. Such a solid frame body easily reflects sound or electromagnetic waves, and it is desired to reduce reflection of such sounds or electromagnetic waves. There is also a problem that the weight of the flooring increases due to the increase in the size of the solid frame. Moreover, since the above-mentioned net member is easy to move up and down, it is difficult to stably support an operator, an apparatus, etc. by this net member.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to enable stable support of workers, devices and the like in the internal space, and to generate sound or electromagnetic waves in the internal space. Therefore, it is possible to provide a laboratory that can reduce the weight of the installed flooring more than the weight of the conventional flooring.

  In order to solve the problem, according to the laboratory of one embodiment of the present invention, a ceiling wall and a bottom wall that are spaced apart from each other in the vertical direction, and at least a sound absorber or radio wave installed on the bottom wall. An absorbent body, a flooring disposed in the interior space between the ceiling wall and the bottom wall and spaced apart from each of the ceiling wall and the bottom wall in the vertical direction, and configured to support the flooring And a support member, wherein the flooring is disposed along the horizontal direction and has a flooring body formed in a skeleton shape, wherein the flooring is the floor A frame further comprising a reinforcing body extending along the material body, wherein the reinforcing body has an upper portion disposed along the longitudinal direction of the reinforcing body and a lower portion disposed with a space downward from the upper portion. An upper portion of the frame element while forming a space between the element and the frame element And a reinforcing element extending so as to connect the fine lower, upper portion of the frame element is connected to said floor member main body, wherein the support member supports the reinforcing member from below. Therefore, the flooring main body is formed in a framework shape, and the reinforcing body that reinforces the flooring main body is formed so as to have a space between the frame element and the reinforcing element that connects the upper and lower parts of the frame element. Thus, the surface area of the flooring can be reduced. As a result, reflection of sound or electromagnetic waves by the flooring can be reduced. Further, the reinforcing body can be configured to have sufficient strength (hereinafter referred to as “supporting strength”) to stably support an operator, a device, and the like by the frame element and the reinforcing element. As a result, the flooring main body can be efficiently reinforced by the reinforcing body having the supporting strength, and further, the flooring main body can be stably supported by the supporting member via the reinforcing body having the supporting strength. Can do. That is, an operator, an apparatus, etc. can be supported stably by a flooring material. Therefore, reflection of sound or electromagnetic waves in the internal space of the laboratory can be reduced while enabling stable support of workers, devices and the like in the internal space of the laboratory. In addition, the weight of the installed flooring can be reduced more than the weight of the conventional flooring in association with the reduction of the surface area of the flooring.

  According to the laboratory which concerns on 1 aspect of this invention, the said reinforcement body is formed in frame shape with the said frame element and the said reinforcement element. Therefore, in addition to the main body of the floor material, the reinforcing body is also formed in a frame shape, so that the surface area of the floor material can be efficiently reduced. As a result, the reflection of sound or electromagnetic waves by the flooring can be efficiently reduced. Incidentally, the weight of the installed flooring can be further reduced than the weight of the conventional flooring.

  According to the laboratory which concerns on 1 aspect of this invention, the said reinforcement element inclines in the longitudinal direction of the said reinforcement body between the upper part and the lower part of the said frame element. Therefore, the strength of the reinforcing body can be improved by the inclined reinforcing element, and the strength of the flooring can be improved. As a result, workers, devices, etc. can be stably supported by the floor material.

  According to the laboratory which concerns on 1 aspect of this invention, the said reinforcement body is an outer peripheral part reinforcement body extended along the outer peripheral part of the said flooring main body. Therefore, the flooring main body can be stably supported by the support member via the outer peripheral edge reinforcing body extending along the outer peripheral edge of the flooring main body. As a result, an operator, an apparatus, etc. can be supported stably by the floor material which has such a floor material main body and an outer periphery peripheral part reinforcement body.

  According to the laboratory which concerns on 1 aspect of this invention, the said flooring further has the center part reinforcement body extended along the center part of the said flooring main body enclosed by the said outer periphery part. Therefore, in addition to the outer peripheral edge reinforcing body extending along the outer peripheral edge of the flooring main body, the strength of the flooring can be further improved by the central reinforcing body extending along the central part of the flooring main body. As a result, workers, devices, and the like can be more stably supported by the floor material.

  According to the laboratory which concerns on 1 aspect of this invention, an operator, an apparatus, etc. can be supported stably in internal space, and reflection of the sound or electromagnetic waves in internal space can be reduced. Incidentally, the weight of the installed flooring can be reduced from the weight of the conventional flooring.

It is sectional drawing which shows schematically the anechoic chamber in 1st Embodiment of this invention. It is a perspective view which shows roughly a part of anechoic chamber in embodiment of this invention in the state which removed a part among several flooring materials. It is a perspective view which shows roughly a part of supporting member in 1st Embodiment of this invention, and the floor material of the circumference | surroundings. It is a top view which shows roughly the flooring in 1st Embodiment of this invention. It is a bottom view which shows roughly the flooring in a 1st embodiment of the present invention in the state where a flooring main part was partially omitted. It is a front view which shows roughly the flooring in 1st Embodiment of this invention. It is a side view which shows roughly the flooring material in 1st Embodiment of this invention in the state which partially abbreviate | omitted the 3rd center part reinforcement body located behind the 2nd outer periphery part reinforcement body. It is the sectional view on the AA line of FIG. It is a figure which shows roughly the BB line cross section of FIG. 4 in the state which abbreviate | omitted the 3rd center part reinforcement body located behind a 2nd center part reinforcement body. It is a figure which shows roughly the CC sectional view of FIG. 4 in the state which abbreviate | omitted the 2nd center part reinforcement body located behind a 3rd center part reinforcement body. It is a top view which shows roughly a part of bottom wall of the anechoic chamber in 1st Embodiment of this invention in the state which removed the flooring. (A) As a result of the measurement of Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 500 Hz to the microphone and the relative sound pressure level. (B) As a result of the measurement of Comparative Example 1, it is a distribution diagram showing the relationship between the distance from the sound source that emits a sine wave of about 500 Hz to the microphone and the relative sound pressure level. (A) As a result of the measurement of Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 1 kHz to the microphone and the relative sound pressure level. (B) As a result of the measurement of Comparative Example 1, it is a distribution diagram showing the relationship between the distance from the sound source that emits a sine wave of about 1 kHz to the microphone and the relative sound pressure level. (A) As a result of the measurement in Example 1, it is a distribution diagram showing the relationship between the distance from the sound source that emits a sine wave of about 2 kHz to the microphone and the relative sound pressure level. (B) As a result of the measurement of Comparative Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 2 kHz to the microphone and the relative sound pressure level. (A) As a result of the measurement of Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 4 kHz to the microphone and the relative sound pressure level. (B) As a result of the measurement of Comparative Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 4 kHz to the microphone and the relative sound pressure level. (A) As a result of the measurement of Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 8 kHz to the microphone and the relative sound pressure level. (B) As a result of the measurement of Comparative Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 8 kHz to the microphone and the relative sound pressure level. (A) As a result of the measurement of Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 16 kHz to the microphone and the relative sound pressure level. (B) As a result of the measurement of Comparative Example 1, it is a distribution diagram showing the relationship between the distance from the sound source emitting a sine wave of about 16 kHz to the microphone and the relative sound pressure level.

  The laboratories according to the first and second embodiments of the present invention will be described below. In the first embodiment, an acoustic laboratory used for acoustic experiments will be described. In the second embodiment, a radio wave laboratory used for radio wave experiments will be described.

[First Embodiment]
The acoustic laboratory according to the first embodiment of the present invention will be described below. In the description of the acoustic laboratory according to the present embodiment, an anechoic chamber is used as an example of the acoustic laboratory. However, the acoustic laboratory of the present invention is not limited to this, and may be an acoustic laboratory other than the anechoic chamber as long as it is used for acoustic experiments. For example, the acoustic laboratory can be a simple anechoic room, a soundproof room, or the like.

[Basic configuration of anechoic chamber]
First, the basic configuration of the anechoic chamber will be described. As shown in FIG. 1, the anechoic chamber includes a ceiling wall 1 and a bottom wall 2 that are spaced apart from each other in the vertical direction, and a side wall 3 that is disposed between the ceiling wall 1 and the bottom wall 2. The interior space of the anechoic chamber is surrounded by the ceiling wall 1, the bottom wall 2, and the side wall 3. A plurality of sound absorbers 4 are attached to the ceiling wall 1, the bottom wall 2, and the side wall 3 so that the interior space of such an anechoic chamber is a space substantially free of sound reflection. The sound absorber 4 is preferably detachably attached to the ceiling wall 1, the bottom wall 2, and the side wall 3.

  As shown in FIGS. 1 to 3, a plurality of flooring materials 5 are provided in the interior space of the anechoic chamber with a space in the vertical direction from each of the ceiling wall 1 and the bottom wall 2. The plurality of flooring materials 5 are exposed in the internal space of the anechoic chamber. Moreover, although the several flooring 5 is arrange | positioned along with the horizontal direction and is an example to the last, the several flooring 5 is good to be arranged along with the approximate matrix form in the horizontal direction. On the other hand, only one floor material may be arranged in the interior space of the anechoic chamber with a space in the vertical direction from each of the ceiling wall and the bottom wall. A plurality of support members 6 configured to support the flooring 5 are further provided in the internal space of the anechoic chamber.

[Configuration of sound absorber]
Here, the configuration of the sound absorber 4 will be described in detail. The sound absorber 4 is manufactured using a sound absorbing material. The plurality of sound absorbers 4 are arranged side by side on the surfaces of the ceiling wall 1, the bottom wall 2, and the side wall 3. Although it is an example to the last, the some sound absorber 4 is good to be arrange | positioned along with substantially matrix form on each surface of the ceiling wall 1, the bottom wall 2, and the side wall 3. FIG. 1 and 2, the sound absorbing body 4 has three sound absorbing wedges 4a protruding from the surface of the ceiling wall 1, the bottom wall 2, or the side wall 3, and the sound absorbing wedge 4a has a distal end from its base end. It is formed in a substantially wedge shape so as to taper toward.

[Other structure of sound absorber]
However, the sound absorber of the present invention is not limited to this, and may be configured as follows. In particular, when the acoustic laboratory is a simple anechoic chamber, a soundproof room, or the like, the sound absorber may be attached to at least the bottom wall. Moreover, the sound absorber may have one, two, or four or more sound absorbing wedges. The sound absorber may be formed in a substantially flat plate shape.

[Composition of flooring]
The configuration of the flooring 5 will be described in detail. As shown in FIG. 3, the flooring 5 has a flooring main body 7 disposed along a substantially horizontal direction. Moreover, the flooring 5 has a plurality of reinforcing bodies arranged along the flooring main body 7, specifically, a plurality of outer peripheral edge reinforcing bodies 8 and 9 and a plurality of central part reinforcing bodies 10. , 11 and 12. The outer peripheral edge reinforcing bodies 8 and 9 extend along the outer peripheral edge portion 7 a of the floor material body 7. In particular, it is preferable that the outer peripheral edge reinforcing bodies 8 and 9 are arranged below the outer peripheral edge portion 7a. The central reinforcement bodies 10 to 12 extend linearly along the central portion 7 b surrounded by the outer peripheral edge portion 7 a of the floor material body 7. In particular, the central reinforcements 10 to 12 are preferably disposed below the central part 7b.

[Configuration of flooring body]
The flooring main body 7 will be further described. As shown in FIG.4 and FIG.5, the outer peripheral edge part 7a of the flooring main body 7 is formed in the substantially square shape. The floor material body 7 is formed into a skeleton shape by combining a plurality of elongated materials extending in a slender shape, and the plurality of elongated materials are arranged in a substantially lattice shape. The elongated material forming the floor material main body 7 is a material that enables the strength of the floor material 5 to be sufficiently strong (hereinafter referred to as “support strength”) to stably support an operator, a device, and the like. However, it is preferable that such an elongated material is manufactured using a metal material, a reinforced plastic material, or the like. In addition, the elongate material which forms the flooring main body 7 can be made into a wire, a bar, an elongate board etc., for example. The floor material body 7 is formed with a plurality of meshes, the size of each mesh is smaller than the size of the operator's feet located on the floor material 5 and the reflection of sound by the floor material body 7 can be reduced. It is good to be determined to do.

[Another configuration of the flooring body]
However, the flooring main body of the present invention is not limited to this, and may be as follows. The outer peripheral edge of the flooring main body is not simply formed in a substantially rectangular shape, but may be formed in a shape including a substantially arc shape, a substantially polygonal shape, or the like. In addition, the plurality of elongated materials forming the flooring main body are not limited to being arranged in a substantially lattice shape, but may be arranged so that the flooring main body has a plurality of substantially polygonal meshes.

[Configuration of outer periphery reinforcement of flooring]
The outer peripheral edge reinforcements 8 and 9 of the flooring 5 will be further described. As shown in FIGS. 3, 6, and 7, each of the outer peripheral edge reinforcing bodies 8 and 9 has frame elements 8 a and 9 a arranged along the longitudinal direction thereof. The frame elements 8a and 9a have frame upper portions 8a1 and 9a1 extending along the outer peripheral edge portion 7a, and frame lower portions 8a2 and 9a2 arranged at intervals downward with respect to the frame upper portions 8a1 and 9a1. Yes. The frame upper portions 8 a 1 and 9 a 1 are joined to the outer peripheral edge portion 7 a of the floor material body 7. The frame elements 8a and 9a also have frame side portions 8a3 and 9a3 extending between both longitudinal ends of the frame upper portions 8a1 and 9a1 and both longitudinal ends of the frame lower portions 8a2 and 9a2. The frame side portions 8a3 and 9a3 of the adjacent outer peripheral reinforcement bodies 8 and 9 are joined to each other.

  Further, each of the outer peripheral edge reinforcing bodies 8 and 9 has a plurality of reinforcing elements 8b extending so as to connect the frame upper parts 8a1 and 9a1 and the frame lower parts 8a2 and 9a2 while forming a space between the frame elements 8a and 9a. , 9b. A part of the plurality of reinforcing elements 8b, 9b extends between the frame upper parts 8a1, 9a1 and the frame lower parts 8a2, 9a2 while being inclined in one of the longitudinal directions of the outer peripheral edge reinforcing bodies 8, 9, and a plurality of reinforcing elements Another part of the elements 8b and 9b extends between the frame upper portions 8a1 and 9a1 and the frame lower portions 8a2 and 9a2 while being inclined to the other in the longitudinal direction of the outer peripheral edge reinforcing bodies 8 and 9.

  In particular, one of the adjacent reinforcing elements 8b and 9b extends between the frame upper portions 8a1 and 9a1 and the frame lower portions 8a2 and 9a2 while inclining in one of the longitudinal directions of the outer peripheral edge reinforcing bodies 8 and 9, and adjacent reinforcements. The other of the elements 8b and 9b may extend while inclining to the other in the longitudinal direction of the outer peripheral edge reinforcing bodies 8 and 9 at the frame upper parts 8a1 and 9a1 and the frame lower parts 8a2 and 9a2. In this case, it is preferable that the adjacent reinforcing elements 8b and 9b are connected to each other, and it is preferable that the plurality of reinforcing elements 8b and 9b are arranged in a substantially zigzag shape.

  As shown in FIGS. 3 and 5, in such a plurality of outer peripheral edge reinforcing bodies 8 and 9, adjacent outer peripheral edge reinforcing bodies 8 and 9 are connected to each other in the longitudinal direction. Further, each of the frame elements 8a, 9a and the reinforcing elements 8b, 9b is formed of at least one elongated material that is elongated, and the outer peripheral edge reinforcing bodies 8, 9 are formed by the frame elements 8a, 9a and the reinforcing elements 8b, 9b. It is formed into a skeleton shape.

  The elongated material forming the frame elements 8a, 9a and the reinforcing elements 8b, 9b may be produced using a material that enables the strength of the flooring 5 to be the supporting strength, but this is only an example, Such an elongated material may be manufactured using a metal material, a reinforced plastic material, or the like. In particular, the thickness of the elongated material forming the frame elements 8a, 9a and the reinforcing elements 8b, 9b is preferably substantially equal to the thickness of the elongated material forming the floor material body 7. The elongated material forming the frame elements 8a and 9a and the reinforcing elements 8b and 9b can be, for example, a wire, a bar, an elongated plate, or the like. In addition, it is preferable that substantially the entire outer peripheral edge reinforcements 8 and 9 are formed in a skeleton shape. It is also possible to partially form a skeleton shape.

  Although it is only an example to the last, it is preferable that the outer peripheral edge reinforcing bodies 8 and 9 are further configured as follows. As shown in FIGS. 3 and 4, the outer peripheral edge portion 7 a of the substantially quadrangular flooring main body 7 crosses the first edge and the first edge opposite to each other. 3 and FIG. 5, the outer peripheral edge reinforcing body group composed of the plurality of outer peripheral edge reinforcing bodies 8 and 9 described above is the first outer peripheral edge portion 7a. The 1st outer periphery part reinforcement body 8 extended along the edge of this, and the 2nd outer periphery part reinforcement body 9 extended along the 2nd edge are included.

[Another configuration of the outer peripheral edge reinforcement of the flooring]
However, the outer peripheral edge reinforcing body of the present invention is not limited to this, and may be as follows. The number of outer peripheral edge reinforcing bodies provided on the flooring material may be one. The frame upper part of the frame element only needs to be connected to the outer peripheral edge of the flooring main body. For example, the frame upper part of the frame element may be integrated with the outer peripheral edge of the flooring main body.

  At least one of the plurality of outer peripheral edge reinforcing bodies may have only one reinforcing element. At least one of the plurality of reinforcing elements may extend along the vertical direction. In some or all of the plurality of reinforcing elements, adjacent reinforcing elements may extend between the upper part of the frame and the lower part of the frame while inclining only in one of the longitudinal directions of the outer peripheral edge reinforcing body. In some or all of the plurality of reinforcing elements, adjacent reinforcing elements may be arranged at intervals in the longitudinal direction of the outer peripheral edge reinforcing body without being connected to each other.

  The thickness of the elongated material forming the frame element and the reinforcing element may be different from the thickness of the elongated material forming the floor material body. In particular, in terms of securing the strength of the outer peripheral edge reinforcing body, the frame element and The thickness of the elongated material forming the reinforcing element is preferably larger than the thickness of the elongated material forming the floor material body. In at least one of the plurality of outer peripheral edge reinforcing bodies, the frame element and the reinforcing element may be formed by perforating a solid material such as a plate material. In some or all of the plurality of outer peripheral edge reinforcing bodies, the frame side parts of the adjacent outer peripheral edge reinforcing bodies may be connected to each other by other than joining, for example, the frame side parts of the adjacent outer peripheral edge reinforcing bodies may be connected to each other. It may be united. On the other hand, in some or all of the plurality of outer peripheral edge reinforcing bodies, the frame side portions of the adjacent outer peripheral edge reinforcing bodies may be arranged at intervals in the longitudinal direction.

[Configuration of the reinforcement at the center of the flooring]
The center part reinforcement bodies 10-12 of the flooring 5 are further demonstrated. As shown in FIGS. 3 and 8 to 10, each of the central reinforcing bodies 10 to 12 has frame elements 10 a, 11 a, and 12 a that are arranged along the longitudinal direction thereof. The frame elements 10a to 12a include frame upper portions 10a1, 11a1, and 12a1 extending along the central portion 7b, and frame lower portions 10a2, 11a2, and 12a2 that are arranged at a downward interval with respect to the frame upper portions 10a1 to 12a1. Have. The frame upper portions 10 a 1 to 12 a 1 are joined to the central portion 7 b of the floor material body 7.

  Each of the central reinforcements 10 to 12 has a plurality of reinforcement elements 10b and 11b extending so as to connect the frame upper parts 10a1 to 12a1 and the frame lower parts 10a2 to 12a2 while forming a space between the frame elements 10a to 12a. 12b. Some of the plurality of reinforcing elements 10b to 12b extend between the frame upper parts 10a1 to 12a1 and the frame lower parts 10a2 to 12a2 while inclining in one of the longitudinal directions of the central reinforcing bodies 10 to 12, and the plurality of reinforcing elements Another part of 10b to 12b extends between the frame upper portions 10a1 to 12a1 and the frame lower portions 10a2 to 12a2 while being inclined to the other in the longitudinal direction of the central reinforcements 10 to 12.

  In particular, one of the adjacent reinforcing elements 10b to 12b extends between the frame upper parts 10a1 to 12a1 and the frame lower parts 10a2 to 12a2 while being inclined in one of the longitudinal directions of the central reinforcing bodies 10 to 12, and the adjacent reinforcing elements. The other of 10b-12b is preferably extended between the frame upper parts 10a1-12a1 and the frame lower parts 10a2-12a2 while inclining to the other in the longitudinal direction of the central reinforcements 10-12. In this case, it is preferable that the adjacent reinforcing elements 10b to 12b are connected to each other, and it is further preferable that the plurality of reinforcing elements 10b to 12b are arranged in a substantially zigzag shape.

  As shown in FIG.3 and FIG.5, the some center part reinforcement bodies 10-12 are arrange | positioned at the substantially grid | lattice form. The frame element 10a in a part of the plurality of central part reinforcing bodies 10 to 12 and the frame elements 11a and 12a in another part of the plurality of central part reinforcing bodies 10 to 12 are arranged so as to cross each other. And may be connected at the intersection. Further, each of the frame elements 10a to 12a and the reinforcing elements 10b to 12b is formed of at least one elongated material that is elongated, and the central reinforcing bodies 10 to 12 are framed by the frame elements 10a to 12a and the reinforcing elements 10b to 12b. It is formed into a shape.

  The elongated material forming the frame elements 10a to 12a and the reinforcing elements 10b to 12b may be produced using a material that enables the strength of the flooring 5 to be the supporting strength, but this is only an example, Such an elongated material may be manufactured using a metal material, a reinforced plastic material, or the like. In particular, the thickness of the elongated material forming the frame elements 10 a to 12 a and the reinforcing elements 10 b to 12 b is preferably substantially equal to the thickness of the elongated material forming the floor material body 7. The elongated material forming the frame elements 10a to 12a and the reinforcing elements 10b to 12b can be, for example, a wire, a bar, an elongated plate, or the like. In addition, it is preferable that substantially the entire center portion reinforcing bodies 10 to 12 are formed in a skeleton shape. It is also possible to form a skeleton shape.

  Although it is only an example to the last, it is preferable that the center part reinforcement bodies 10-12 are further as follows. As shown in FIG. 3 and FIG. 5, the central part reinforcing body group composed of the plurality of central part reinforcing bodies 10 to 12 is the first center disposed substantially parallel to the first outer peripheral edge reinforcing body 8. A part reinforcing body 10 and second and third central part reinforcing bodies 11 and 12 arranged substantially parallel to the second outer peripheral edge reinforcing body 9 are included.

  As shown in FIGS. 3, 6, and 8, the reinforcing element 10 b of the first central reinforcement 10 is arranged in the same manner as the reinforcing element 8 b of the first outer peripheral reinforcement 8. As shown in FIGS. 3 and 5, when the second and third central reinforcements 11 and 12 are spaced apart from each other and arranged so as to face each other, FIGS. As shown, the reinforcing elements 11b, 12b facing each other in the second and third central reinforcing bodies 11, 12 are inclined in different directions, and the facing reinforcing elements 11b, 12b are viewed from the facing direction. Are arranged to cross each other. On the other hand, as shown in FIGS. 3, 7, and 9, the reinforcing element 11 b of the second central reinforcing member 11 is arranged in the same manner as the reinforcing element 9 b of the second outer peripheral reinforcing member 9. Yes.

  As shown in FIGS. 3 and 5, the first central reinforcement 10 is arranged along the direction intersecting with the second and third central reinforcements 11, 12. The crossing portions of the frame elements 10a and 11a in the central reinforcement bodies 10 and 11 are connected to each other, and the crossing portions of the frame elements 10a and 12a in the first and third central reinforcement bodies 10 and 12 are connected to each other. Yes.

[Another configuration of the reinforcement at the center of the flooring]
However, the center part reinforcement body of this invention is not limited to this, It may become as follows. One may be sufficient as the center part reinforcement body provided in a flooring. The central portion reinforcing body may extend while curving along the central portion of the flooring main body. The frame upper part of the frame element only needs to be connected to the central part of the flooring main body. For example, the frame upper part of the frame element may be integrated with the central part of the flooring main body.

  At least one of the plurality of central reinforcing bodies may have only one reinforcing element. At least one of the plurality of reinforcing elements may extend along the vertical direction. In some or all of the plurality of reinforcing elements, adjacent reinforcing elements may extend between the upper part of the frame and the lower part of the frame while being inclined only in one of the longitudinal directions of the outer peripheral edge reinforcing body. In some or all of the plurality of reinforcing elements, adjacent reinforcing elements may be arranged at intervals in the longitudinal direction of the outer peripheral edge reinforcing body without being connected to each other.

  The thickness of the elongated material forming the frame element and the reinforcing element may be different from the thickness of the elongated material forming the floor material body. In particular, in terms of ensuring the strength of the central reinforcement, the frame element and the reinforcing material The thickness of the elongated material forming the element is preferably larger than the thickness of the elongated material forming the floor material body. The frame element and the reinforcing element may be formed by perforating a solid material such as a plate material. Some or all of the plurality of central reinforcements are arranged substantially in parallel at the center of the flooring main body, or are substantially radial, substantially circular, or substantially polygonal at the central part of the flooring main body. And so on. In some or all of the plurality of central reinforcements, adjacent central reinforcements may be arranged with a space therebetween.

[Relationship between outer peripheral edge reinforcement and center reinforcement in flooring]
Here, the relationship between the outer peripheral edge reinforcing bodies 8 and 9 and the central reinforcing bodies 10 to 12 will be described. As shown in FIGS. 3 and 5, at least one of the plurality of outer peripheral edge reinforcements 8 and 9 and at least one of the plurality of center reinforcements 10 to 12 are arranged in a direction intersecting each other, and End portions in the longitudinal direction of the frame elements 10 a to 12 a in at least one of the part reinforcing bodies 10 to 12 are connected to the frame elements 8 a and 9 a in at least one of the outer peripheral edge reinforcing bodies 8 and 9.

  Although it is an example to the last, it is preferable that the relationship between the outer peripheral edge reinforcements 8 and 9 and the central reinforcements 10 to 12 is as follows. As shown in FIGS. 3 and 5, the first outer peripheral edge reinforcing body 8 is disposed along the direction intersecting with the second and third central reinforcing bodies 11, 12. Both end portions in the longitudinal direction of the frame elements 11a and 12a in the three central reinforcement bodies 11 and 12 are connected to the frame elements 8a of the first outer peripheral edge reinforcement bodies 8 facing each other. The second outer peripheral edge reinforcement 9 is disposed along the direction intersecting the first central reinforcement 10, and both longitudinal ends of the frame element 10 a in the first central reinforcement 10 are It is connected to the frame element 9a of the second outer peripheral edge reinforcing body 9 facing each other.

[Another relationship between the outer peripheral edge reinforcement and the central reinforcement in the flooring]
However, the relationship between the outer peripheral edge reinforcements 8 and 9 and the central reinforcements 10 to 12 in the present invention is not limited to this, and may be as follows. The flooring may have only one of the outer peripheral edge reinforcement and the central reinforcement. At least one of the plurality of outer peripheral edge reinforcing members and at least one of the plurality of central reinforcing members are arranged in a direction intersecting each other, and the longitudinal direction of the frame element in at least one of the plurality of central reinforcing members May be arranged at an interval from the frame element in at least one of the plurality of outer peripheral edge reinforcing bodies.

[Floor size and skeleton shape]
The size of the flooring 5 described above preferably corresponds to the size of at least one sound absorber 4 arranged on the bottom wall 2 in plan view. In particular, it is preferable that the size of the flooring 5 corresponds to the size of the plurality of sound absorbers 4 arranged in a matrix of M rows and N columns in plan view. Note that M and N are integers of 1 or more. However, the size of the flooring can be determined regardless of the size of the sound absorber 4 in plan view. Further, it is preferable that substantially the entire flooring 5 is formed in a skeleton shape, but the flooring is partially formed in a skeleton shape as long as it is within a range in which reflection of sound by the flooring can be reduced compared to the conventional case. It is also possible.

[Configuration of support member]
The configuration of the support member 6 will be described in detail. As shown in FIGS. 1 to 3, the support member 6 is formed to extend upward from the bottom wall 2. As shown in FIGS. 2 and 11, the support member 6 is disposed between adjacent sound absorbers 4. In particular, when the size of the flooring 5 corresponds to the size of the combination of the plurality of sound absorbers 4 arranged in a matrix of M rows and N columns in plan view, the support member 6 is And it is good to arrange | position at the corner | angular part of the combination which consists of such a sound absorber 4. As an example only, when the size of the flooring 5 corresponds to the size of a combination of six sound absorbers 4 arranged in a matrix of 2 rows and 3 columns in plan view, FIG. As shown, the support member 6 may be arranged at the corner of a combination of such six sound absorbers 4.

  Since the flooring 5 can be supported by at least three supporting members 6, the outer peripheral edge reinforcing bodies 8 and 9 and the intermediate portion reinforcing bodies 10 to 12 are respectively attached to the upper end portions 6 a of the at least three supporting members 6. It is preferable that the support member 6 supports the flooring 5 from below with at least three placed thereon. The support member 6 is good to support the edge part of the outer peripheral edge reinforcement bodies 8 and 9 in the longitudinal direction from the downward direction. In particular, it is preferable that the supporting member 6 supports the end portions in the longitudinal direction of the adjacent outer peripheral edge reinforcing bodies 8 and 9 from below. In this case, the ends of the outer peripheral edge reinforcements 8 and 9 supported by the support member 6 are connected to each other, and as shown in FIG. 3, the ends of the outer peripheral edge reinforcements 8 and 9 connected to each other are It is good to be located in the corner | angular part of the rectangular flooring main body 7.

[Other structure of support member]
However, the support member of the present invention is not limited to this, and may be as follows. A support member may be arrange | positioned so that a sound-absorbing body may be penetrated. The support member may support the floor material from below in a state where the longitudinal intermediate portion of the outer peripheral edge reinforcing body in the floor material is placed on the upper end portion of the support member. The support member may support the floor material from below in a state where the central reinforcement in the floor material is placed on the upper end portion of the support member. In addition, it is only necessary that the support member supports the floor material from below in a state where the outer peripheral edge reinforcement or the intermediate reinforcement is placed on the upper end of at least one support member. For example, one support member Alternatively, the outer peripheral edge reinforcing member or the intermediate reinforcing member is placed on the upper end of each of the two supporting members, and the floor material other than the outer peripheral reinforcing member and the central reinforcing member is placed on the upper end of the remaining supporting members. In this state, in particular, the flooring main body is placed, the support member may support the flooring from below.

[Action and effect]
The operation and effect of this embodiment will be described below. According to this embodiment, the flooring main body 7 is formed in a frame shape, and the outer peripheral edge reinforcing bodies 8 and 9 and the central reinforcing bodies 10 to 12 that reinforce the flooring main body 7 are frame elements 8a to 12a. And the reinforcing elements 8b to 12b connecting the frame upper parts 8a1 to 12a1 and the frame lower parts 8a2 to 12a2, the surface area of the flooring 5 can be reduced. As a result, reflection of sound by the flooring 5 can be reduced. Further, the outer peripheral edge reinforcing bodies 8 and 9 and the central reinforcing bodies 10 to 12 can be configured to have support strength by the frame elements 8a to 12a and the reinforcing elements 8b to 12b. As a result, it is possible to efficiently reinforce the flooring main body 7 by the outer peripheral edge reinforcing bodies 8 and 9 and the central part reinforcing bodies 10 to 12 having the supporting strength. It can be stably supported by the support member 6 via at least one of the outer peripheral edge reinforcements 8 and 9 and the central reinforcements 10 to 12. That is, the flooring 5 can stably support workers, devices, and the like. Therefore, it is possible to reduce the reflection of sound in the internal space of the anechoic chamber while stably supporting workers, devices, and the like in the internal space of the anechoic chamber. In addition, accompanying the reduction in the surface area of the flooring 5, the weight of the flooring 5 can be reduced more than the weight of the conventional flooring.

  According to this embodiment, in addition to the flooring main body 7, the outer peripheral edge reinforcing bodies 8 and 9 and the central reinforcing bodies 10 to 12 are also formed in a frame shape, so that the surface area of the flooring 5 is efficiently reduced. Can be made. As a result, sound reflection by the flooring 5 can be efficiently reduced. In addition, the weight of the flooring 5 can be further reduced than the weight of the conventional flooring.

  According to the present embodiment, the outer peripheral edge reinforcement bodies 8 and 9 and the central reinforcement bodies 10 to 12 are inclined by the inclined reinforcement elements 8 b to 12 b in the outer peripheral edge reinforcement bodies 8 and 9 and the central reinforcement bodies 10 to 12. The strength can be improved, and the strength of the flooring 5 can be improved. As a result, an operator, an apparatus, etc. can be stably supported by the flooring 5.

  According to the present embodiment, the floor material main body 7 can be stably supported by the support member 6 via the outer peripheral edge reinforcement bodies 8 and 9 extending along the outer peripheral edge portion 7 a of the floor material main body 7. As a result, workers, devices, and the like can be stably supported by the flooring 5 having the flooring main body 7 and the outer peripheral edge reinforcing bodies 8 and 9.

  According to the present embodiment, in addition to the outer peripheral edge reinforcements 8 and 9 extending along the outer peripheral edge portion 7 a of the floor material body 7, the central reinforcement bodies 10 to 10 extending along the central portion 7 b of the floor material body 7. 12, the strength of the flooring 5 can be further improved. As a result, the flooring 5 can more stably support workers, devices, and the like.

[Second Embodiment]
A radio wave laboratory according to the second embodiment of the present invention will be described below. In the description of the radio wave laboratory according to the present embodiment, an anechoic chamber is used as an example of the radio wave laboratory. However, the radio wave laboratory of the present invention is not limited to this, and any radio wave laboratory other than the radio wave anechoic chamber can be used as long as it is used for radio wave experiments. For example, the radio wave laboratory can be a simple anechoic chamber or the like.

  The radio wave laboratory according to this embodiment has the same configuration as that of the acoustic laboratory according to the first embodiment except for the points described below. The configuration will be described using the same reference numerals as in the first embodiment.

[Configuration of electromagnetic wave absorber]
Although not particularly illustrated, the anechoic chamber is not affected by electromagnetic waves from the outside, does not leak electromagnetic waves to the outside, and prevents reflection of electromagnetic waves in the internal space, the ceiling wall 1, the bottom wall 2, and the side walls 3. An electromagnetic wave absorber is attached. The radio wave absorber may be detachably attached to the ceiling wall 1, the bottom wall 2, and the side wall 3. The radio wave absorber is manufactured using a radio wave absorbing material. The plurality of radio wave absorbers are arranged side by side on the surfaces of the ceiling wall 1, the bottom wall 2, and the side wall 3. Although it is an example to the last, a several electromagnetic wave absorber is good to be arrange | positioned along with substantially matrix form on each surface of the ceiling wall 1, the bottom wall 2, and the side wall 3. FIG. The radio wave absorber has a plurality of radio wave absorption elements protruding from the surface of the ceiling wall 1, the bottom wall 2 or the side wall 3, and the radio wave absorption element is tapered so as to taper from the base end toward the tip. It is formed in a quadrangular pyramid shape.

[Another configuration of electromagnetic wave absorber]
However, the radio wave absorber of the present invention is not limited to this, and may be configured as follows. When the radio wave laboratory is a simple anechoic chamber or the like, the radio wave absorber may be attached to at least the bottom wall. The radio wave absorber may be formed in a substantially flat plate shape, or may have a plurality of radio wave absorption elements such as a substantially pyramid shape other than a substantially quadrangular pyramid shape, and a substantially wedge shape.

[Configuration of flooring body]
The elongated material forming the flooring main body 7 may be made using a material that makes the strength of the flooring 5 the supporting strength and is non-conductive (insulating). Although this is only an example, such an elongated material is preferably manufactured using a reinforced plastic material or the like, and in particular, such an elongated material is preferably manufactured using a fiber reinforced plastic (FRP) material. Moreover, the elongate material which forms the flooring main body 7 may be produced by applying a non-conductive material on the surface of a material that enables the strength of the flooring 5 to be the supporting strength.

[Configuration of outer periphery reinforcement of flooring]
The elongated material forming the frame elements 8a and 9a and the reinforcing elements 8b and 9b in the outer peripheral edge reinforcements 8 and 9 of the flooring 5 makes it possible to make the strength of the flooring 5 a supporting strength and is non-conductive. It is preferable to use a material that is (insulating). Although this is only an example, such an elongated material is preferably manufactured using a reinforced plastic material or the like, and in particular, such an elongated material is preferably manufactured using a fiber reinforced plastic (FRP) material. Further, the elongated material forming the frame elements 8a and 9a and the reinforcing elements 8b and 9b can be obtained by applying a non-conductive material to the surface of the material that enables the strength of the flooring 5 to be the supporting strength. It may be produced.

[Configuration of the reinforcement at the center of the flooring]
The elongated material forming the frame elements 10a to 12a and the reinforcing elements 10b to 12b in the central reinforcements 10 to 12 of the flooring 5 enables the strength of the flooring 5 to be a supporting strength and is non-conductive ( It is preferable to use a material that is insulating. Although this is only an example, such an elongated material is preferably manufactured using a reinforced plastic material or the like, and in particular, such an elongated material is preferably manufactured using a fiber reinforced plastic (FRP) material. Further, the elongated material forming the frame elements 10a to 12a and the reinforcing elements 10b to 12b is obtained by applying a non-conductive material to the surface of the material that enables the strength of the flooring 5 to be the supporting strength. It may be produced.

[Action and effect]
According to the present embodiment, the same operation and effect as in the first embodiment can be obtained except that the reflection of the sound of electromagnetic waves by the flooring 5 can be reduced instead of the reflection of the sound by the flooring 5. It is done.

  The first and second embodiments of the present invention have been described so far, but the present invention is not limited to the above-described embodiments, and the present invention can be modified and changed based on the technical idea thereof.

  For example, as a modification of the present invention, in at least one of the outer peripheral edge reinforcement and the central reinforcement supported by the support member, the frame element corresponds to the shape of the upper end portion of the support member and is upward from below. You may have the receiving part dented toward. In this case, since the support member can support the flooring with the upper end portion of the support member engaged with the receiving portion, the flooring can be more stably supported by the support member. Moreover, the vertical position of the flooring main body can be adjusted by adjusting the vertical depth of the receiving part without adjusting the height of the support member.

[Example 1]
Example 1 will be described. In Example 1, the flooring 5 described in the first embodiment was installed in an anechoic chamber. On the floor material 5 of the anechoic chamber, the sound source and the microphone are arranged at a predetermined distance in the horizontal direction and a sine wave having a predetermined frequency is emitted from the sound source. The pressure level was measured. This measurement is carried out when the frequency of the sine wave is about 500 Hz, about 1 kHz, about 2 kHz, about 4 kHz, about 8 kHz, and about 16 kHz. In the measurement of each frequency, the distance between the sound source and the microphone is measured. Was varied between about 0.1 m and about 10 m, and the relative sound pressure level at each of the varied distances was measured.

  As a result of the measurement in Example 1, the distribution of measured values when the frequency of the sine wave is about 500 Hz, about 1 kHz, about 2 kHz, about 4 kHz, about 8 kHz, and about 16 kHz is shown in FIG. 13 (a), 14 (a), 15 (a), 16 (a), and 17 (a). In these drawings, the vertical axis L indicates the relative sound pressure level (dB), the horizontal axis d indicates the distance (m) between the sound source and the microphone by logarithmic display, and the * mark indicates the measured value. A solid line P represents a distance attenuation characteristic in a free sound field. The solid line P decreases the relative sound pressure level by 6 dB each time the distance (m) between the sound source and the microphone is doubled. As shown.

[Comparative Example 1]
Comparative Example 1 will be described. In the first comparative example, the flooring has a flooring main body formed in a lattice shape by combining a plurality of wires arranged in the horizontal direction and a plurality of solid frames made of a plate material. And a part of the plurality of solid frames is arranged along the periphery of the flooring main body and attached to the periphery of the flooring main body, and another part of the plurality of solid frames is attached, The flooring that is arranged in parallel at the center of the flooring main body surrounded by the peripheral edge and is attached to the central part of the flooring main body is installed in the anechoic chamber. The same measurement as in Example 1 was performed on the floor material of the anechoic chamber.

  As a result of the measurement in Comparative Example 1, the distribution of measured values when the frequency of the sine wave is about 500 Hz, about 1 kHz, about 2 kHz, about 4 kHz, about 8 kHz, and about 16 kHz is shown in FIG. 13 (b), FIG. 14 (b), FIG. 15 (b), FIG. 16 (b), and FIG. 17 (b). In these figures, the vertical axis L indicates the relative sound pressure level (dB), the horizontal axis d indicates the distance (m) between the sound source and the microphone by logarithmic display, the cross mark indicates the measured value, and the solid line P Is a line representing the distance attenuation characteristic in the free sound field, and the solid line P is shown so that the relative sound pressure level decreases by 6 dB each time the distance (m) between the sound source and the microphone is doubled. ing.

  Here, the measurement results of Example 1 and Comparative Example 1 are compared. As shown in FIGS. 12 and 13, when the frequency of the sine wave is about 500 Hz and about 1 kHz, the distance between the sound source and the microphone is about 0.1 m and about 10 m in both Example 1 and Comparative Example 1. In the entire range, the relative sound pressure level was close to the relative sound pressure level indicated by the solid line P representing the distance attenuation characteristic in the free sound field.

  As shown in FIGS. 14 to 17, when the frequency of the sine wave is about 2 kHz, about 4 kHz, about 8 kHz, and about 16 kHz, in Example 1, the distance between the sound source and the microphone is about 0.1 m. The relative sound pressure level is close to the relative sound pressure level indicated by the solid line P representing the distance attenuation characteristic in the free sound field. On the other hand, in the first comparative example, the relative sound pressure of the solid line P representing the distance attenuation characteristic in the free sound field in the range where the distance between the sound source and the microphone is between about 2 m and about 10 m. Deviated from the pressure level.

  That is, for a sound having a frequency of at least about 2 kHz and at most about 16 kHz, the relative sound pressure level in Example 1 is within the range in which the distance between the sound source and the microphone is at least between about 2 m and about 10 m. It was closer to the relative sound pressure level based on the distance attenuation characteristics in the free sound field than the relative sound pressure level at. The relative sound pressure level in the measurement space differs from the relative sound pressure level based on the distance attenuation characteristics in the free sound field due to the reflection of sound by the object placed in the measurement space. According to this aspect, the relative sound pressure level in Comparative Example 1 is based on the distance attenuation characteristics in the free sound field, rather than the relative sound pressure level in Example 1, due to reflection of sound by the flooring material. It seems that the level was different. Therefore, it was confirmed that the sound reflection by the floor material 5 of Example 1 was reduced as compared with the sound reflection by the floor material of Comparative Example 1.

DESCRIPTION OF SYMBOLS 1 Ceiling wall 2 Bottom wall 4 Sound-absorbing body 5 Floor material 6 Support member 7 Floor material main body 7a Outer peripheral edge part 7b Center part 8 1st outer peripheral edge part reinforcement body 9 2nd outer peripheral edge part reinforcement body 8a, 9a Frame element 8a1 , 9a1 Frame upper part 8a2, 9a2 Frame lower part 8b, 9b Reinforcing element 10 First central part reinforcing body 11 Second central part reinforcing body 12 Third central part reinforcing body 10a, 11a, 12a Frame element 10a1, 11a1, 12a1 Upper frame part 10a2, 11a2, 12a2 Lower frame part 10b, 11b, 12b Reinforcing element L Vertical axis d Horizontal axis P Solid line

Claims (5)

A ceiling wall and a bottom wall that are spaced apart from each other in the vertical direction;
At least a sound absorber or radio wave absorber installed on the bottom wall;
A flooring disposed in the internal space between the ceiling wall and the bottom wall and spaced apart from each of the ceiling wall and the bottom wall;
A support member configured to support the flooring,
The flooring is a laboratory having a flooring body that is arranged along a horizontal direction and is formed into a skeleton shape,
The flooring further comprises a reinforcing body extending along the flooring main body,
The reinforcing body forms a space between the frame element having an upper part arranged along the longitudinal direction of the reinforcing body and a lower part arranged with a space below the upper part, and the lower part. A reinforcing element extending so as to connect the upper and lower parts of the frame element,
The upper part of the frame element is connected to the floor material body,
A laboratory in which the support member supports the reinforcing body from below.   The laboratory according to claim 1, wherein the reinforcing body is formed in a frame shape.   The laboratory according to claim 1 or 2, wherein the reinforcing element is inclined in a longitudinal direction of the reinforcing body between an upper part and a lower part of the frame element.   The laboratory according to any one of claims 1 to 3, wherein the reinforcing body is an outer peripheral edge reinforcing body extending along an outer peripheral edge of the flooring main body.   The laboratory according to claim 4, wherein the flooring further includes a central reinforcement that extends along a central part of the flooring main body surrounded by the outer peripheral edge.

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