WO2014106902A1 - Turntable device - Google Patents

Abstract

The turntable device pertaining to this invention is provided with a floor surface part (1), a turntable part (2), and an electroconductive element (8, 8A). The floor surface (1) and the turntable part (2) have an electromagnetic-wave-shielding function. The turntable part (2) is arranged so that a gap is formed between the turntable part (2) and the floor surface part, and the turntable part (2) rotates relative to the floor surface part (1). The electroconductive element (8, 8A) touches both the floor surface part (1) and the turntable part (2), and rolls relative to both these components (1, 2) when the turntable part (2) rotates.

Description

Turntable device

The present invention relates to a turntable device including a turntable unit used in an anechoic chamber or the like.

In general, a turntable device is provided in the anechoic chamber. The turntable device includes a floor surface portion that is a fixed portion and a turntable portion that is rotatable with respect to the floor surface portion. A test body such as an electronic component and an electric appliance is placed on the turntable portion, and the electromagnetic wave characteristics of the test body are tested while rotating the turntable portion.

Here, a gap is formed between the turntable portion and the floor surface portion in order to avoid contact between the turntable portion and the floor surface portion when the turntable portion rotates. That is, the turntable portion and the floor surface portion are separated by a small distance. Further, both the turntable portion and the floor surface portion have an electromagnetic wave shielding function.

On the other hand, in the electromagnetic wave test of the specimen, it is necessary that the turntable part and the floor part have the same potential. Therefore, there is a demand for a mechanism (hereinafter referred to as a conduction mechanism) that electrically connects the turntable portion and the floor surface portion arranged with a gap therebetween. As a conventional technique related to the conduction mechanism, for example, Patent Document 1 exists.

In the turntable device according to Patent Document 1, the turntable portion and the floor portion are electrically connected via an earth roller. In the technique according to Patent Document 1, the earth roller is fixed on the shaft. When the turntable portion rotates, the earth roller rotates around the shaft while being in contact with the turntable.

JP 2000-187052 A

When the turntable device is continuously used, wear may occur in the conduction mechanism (for example, in the technique according to Patent Document 1, wear on the fixed shaft (rotary shaft) of the earth roller occurs).

摩 耗 Wear of the conduction mechanism causes a hindrance to stable equipotentialization between the turntable portion and the floor surface portion. Also, from the viewpoint of maintenance of the conduction mechanism, there is a demand for simplification of the configuration of the conduction mechanism, and there is also a demand for cost reduction of the conduction mechanism (for example, in the technology according to Patent Document 1, the fixed shaft of the earth roller). If the (rotating shaft) is damaged, its structure makes maintenance very difficult). On the other hand, improvement of electromagnetic shielding in the turntable device is also demanded.

Therefore, an object of the present invention is to provide a turntable device that can suppress wear of a conduction mechanism. More preferably, it is an object of the present invention to provide a turntable device that can realize simplification of the structure of the conduction mechanism and cost reduction. Alternatively, more preferably, an object is to provide a turntable device capable of improving the electromagnetic wave shielding effect.

In order to achieve the above object, a turntable device according to the present invention has an electromagnetic wave shielding function, an opening, a floor surface portion fixedly installed, an electromagnetic wave shielding function, and a horizontal direction. A turntable portion disposed in the opening of the floor surface portion and rotating with respect to the floor surface portion so that a gap is formed between the floor surface portion and the end portion of the floor surface portion, and the floor surface portion and the turntable. A conductor that is arranged so as to come into contact with both of the parts and rolls with respect to the floor surface part and also with respect to the turntable part, while maintaining the contact when the turntable part rotates. It has.

A turntable device according to the present invention has an electromagnetic wave shielding function, has an opening, has a floor surface portion fixedly installed, and has an electromagnetic wave shielding function, and in the horizontal direction, an end of the floor surface portion. A turntable portion disposed in the opening of the floor surface portion and rotating with respect to the floor surface portion so as to form a gap therebetween, and so as to contact both the floor surface portion and the turntable portion. And a conductor that rolls with respect to the floor surface portion and also rolls with respect to the turntable portion while maintaining the contact when the turntable portion rotates.

Thus, in the turntable device, the conduction mechanism according to the present invention is constituted by a conductor that can roll with respect to both the floor portion and the turntable portion. Since it is a conductor that simply rolls and there is no fixed portion, the wear is very low. Therefore, in the present invention, wear of the conduction mechanism can be suppressed. Therefore, in the present invention, stable equipotentialization between the floor portion and the turntable portion can be maintained over a long period.

The objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

It is a top view which shows schematic structure at the time of seeing the anechoic chamber 100 from upper direction. 2 is a cross-sectional view showing a schematic configuration of a cross section of an anechoic chamber 100. FIG. FIG. 3 is an enlarged plan view showing the main configuration of the turntable device according to Embodiment 1. It is an expanded sectional view which shows the principal part structure of the turntable apparatus which concerns on Embodiment 1. FIG. It is an enlarged plan view which shows the principal part structure of the turntable apparatus which concerns on Embodiment 2. FIG. It is an expanded sectional view which shows the principal part structure of the turntable apparatus which concerns on Embodiment 2. FIG. It is an expanded sectional view which shows the principal part structure of the turntable apparatus which concerns on Embodiment 3. FIG. It is an expanded sectional view which shows the principal part structure of the turntable apparatus which concerns on Embodiment 4. FIG. 10 is an enlarged view showing a configuration of a truncated cone-shaped conductor 8A according to Embodiment 4. FIG. It is an expanded sectional view which shows the principal part structure of the turntable apparatus which concerns on Embodiment 5. FIG. It is an expanded sectional view which shows the other structural example of the turntable apparatus which has the collar part 15. FIG.

As described above, an anechoic chamber is used in order to perform tests and measurements related to electromagnetic waves on devices (test bodies) such as electronic devices and electrical devices. FIG. 1 is a plan view showing a schematic configuration when the anechoic chamber 100 is viewed from above. FIG. 2 is a cross-sectional view showing a schematic configuration of a cross section of the anechoic chamber 100.

In this specification, the ceiling side (upper side in FIG. 2) of the anechoic chamber 100 is referred to as “upper” or “upper”, and the floor side (lower side in FIG. 2) of the anechoic chamber 100 is referred to as “lower” or “upper”. Sometimes referred to as “below”.

In the anechoic chamber 100, the entire room 50 in which the test and measurement of the specimen is performed is covered with an electromagnetic shielding material. Further, in the anechoic chamber 100, a radio wave absorber is disposed on the wall or ceiling surface of the room 50 in order to prevent reflection of radio waves.

Further, a turntable is disposed on the floor surface of the room 50 of the anechoic chamber 100. That is, as shown in FIGS. 1 and 2, the floor surface of the room 50 of the anechoic chamber 100 is composed of the floor surface portion 1 and the turntable portion 2.

Here, the floor 1 is fixedly installed in the anechoic chamber 100 (that is, it is immobile in the anechoic chamber 100). On the other hand, the turntable part 2 is rotatable with respect to the floor part 1 which is a fixed state. Note that the floor surface portion 1 and the turntable portion 2 are also covered with an electromagnetic wave shielding material, and a radio wave absorber is provided.

As shown in FIG. 1, the floor surface portion 1 is provided with an opening having a circular shape in plan view. And the turntable part 2 whose planar view shape is circular is arrange | positioned in the said opening part. As shown in FIG. 2, in the state where the turntable portion 2 is disposed in the opening, the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2 are aligned in the horizontal direction (that is, as described later). Although the gap 3 exists, the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2 are flush with each other).

Here, the diameter of the turntable 2 is slightly smaller than the diameter of the opening. Accordingly, as shown in FIGS. 1 and 2, in a state where the turntable portion 2 is disposed in the opening portion, in the horizontal direction, between the end portion of the floor surface portion 1 and the end portion of the turntable portion 2. A gap 3 is formed.

The presence of the gap 3 prevents the turntable portion 2 from contacting the floor surface portion 3 when the turntable portion 2 rotates. As an example, when the diameter of the turntable 2 is about 10 m, the width of the gap 3 is several mm (for example, about 5 to 7 mm).

As shown in FIG. 2, a space 5 is formed under the floor of the anechoic chamber 100, and various devices (not shown) including the motor 4 are disposed in the space 5. The turntable portion 2 is rotated by the motor 4. More specifically, the turntable unit 2 is rotated by a driving force of the motor 4 about a virtual rotation axis AX passing through the center of the turntable unit 2 (in FIG. 1, clockwise or counterclockwise). The turntable unit 2 rotates).

The test specimen is placed on the turntable 2. And in the anechoic chamber 100, the test and measurement regarding the electromagnetic wave with respect to the said test body are implemented, rotating the said turntable part 2. FIG.

In addition, although electromagnetic waves are generated from the motor 4 or the like disposed in the space 5, the generated electromagnetic waves enter the indoor 50 side by the electromagnetic wave shielding function of the floor surface portion 1 and the electromagnetic wave shielding function of the turntable portion 2. This is suppressed / prevented.

The turntable device according to the present invention is constituted by a conduction mechanism in which the floor surface portion 1 and the turntable portion 2 have the same potential in addition to the floor surface portion 1, the turntable portion 2 and the motor 4 described above. Hereinafter, the conduction mechanism according to the present invention will be specifically described with reference to the drawings illustrating the embodiments.

<Embodiment 1>
FIG. 3 is a plan view showing a configuration of a conduction mechanism provided in the turntable device according to the present embodiment. Furthermore, FIG. 4 is a cross-sectional view showing the configuration of the conduction mechanism. Here, FIGS. 3 and 4 are enlarged views showing a part of the gap 3 shown in FIGS. 1 and 2 (including a part of the peripheral configuration).

As shown in FIGS. 3 and 4, a conductor 8 is provided as a conduction mechanism. The conductor 8 is disposed so as to contact both the floor surface portion 1 and the turntable portion 2. And when the turntable part 2 rotates, the conductor 8 rolls with respect to the floor surface part 1, and also rolls with respect to the turntable part 2, maintaining the said contact. That is, the conductor 8 is not fixed anywhere and can freely roll in the gap 3. The specific configuration of the present embodiment is as follows.

In the present embodiment, the floor portion 1 has a flat plate shape having a predetermined thickness, and the turntable portion 2 has a disk shape having a predetermined thickness. Here, in the configuration illustrated in FIG. 4, the thickness of the floor surface portion 1 and the thickness of the turntable portion 2 are the same, but the height of the main surface (upper surface) of the floor surface portion 1 that becomes the floor surface of the room 50. If the main surface (upper surface) height of the turntable portion 2 matches (if it is flush), it is not necessary to make the thicknesses of both members 1 and 2 particularly the same.

As shown in FIG. 4, the peripheral end portion (peripheral end portion on the opening side) facing the turntable portion 2 of the floor surface portion 1 is an inclined surface that expands as it proceeds upward. Similarly, the peripheral edge part which faces the floor surface part 1 of the turntable part 2 becomes an inclined surface which spreads as it progresses upward. With this configuration, that is, with the shape of the peripheral end portion of the floor surface portion 1 and the shape of the peripheral end portion of the turntable portion 2, the gap having a tapered cross section that becomes narrower as it goes downward 3 is formed (see FIGS. 3 and 4).

In the present embodiment, the conductor 8 is disposed in the gap 3 having the tapered shape. Here, in the configuration illustrated in FIGS. 3 and 4, the conductor 8 is a sphere. In the gap 3, the conductor 8 is in contact with the peripheral end portion of the floor surface portion 1 and the peripheral end portion of the turntable portion 2. By the contact, the floor portion 1 and the turntable portion 2 are electrically connected via the conductor 8.

Here, the conductor 8 is made of a conductive material such as copper, brass or iron. Moreover, the diameter of the conductor 8 which is a sphere is about several mm. The conductor 8 is large enough to fit within the gap 3. That is, the conductor 8 is smaller than the widest portion of the gap 3 and larger than the narrowest portion of the gap 3. As shown in FIG. 4, the upper portion of the conductor 8 is preferably located at a position lower than the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2. That is, it is desirable that the conductor 8 does not protrude upward from the gap 3.

As described above, the conductor 8 is disposed so as to be in contact with both the peripheral end portion of the floor surface portion 1 and the peripheral end portion of the turntable portion 2. And when the turntable part 2 rotates, while the said contact is maintained, the conductor 8 rolls also with respect to the peripheral end part of the floor surface part 1, and also with respect to the peripheral end part of the turntable part 2. FIG.

Further, as shown in FIG. 3, the conductors 8 are plural, and the conductors 8 are arranged side by side along the circumferential direction in the annular gap 3 shown in the plan view of FIG. (See enlarged view of FIG. 3). Here, the adjacent conductors 8 may be in contact with each other, or the adjacent conductors 8 may be spaced apart.

Note that it is desirable to increase the number of the conductors 8 and arrange the conductors 8 in a dense state in the annular gap 3. Thereby, even if the turntable part 2 is rotated and the conductor 8 rolls and moves in the gap 3, it is possible to prevent the conductor 8 from being biased and arranged in a limited area in the entire gap 3.

Further, as shown in FIG. 5, a plurality of partition portions 9 may be evenly arranged in the annular gap 3. In the configuration illustrated in FIG. 5, the partition portion 9 is connected to the floor surface portion 1 side and is not connected to the turntable portion 2 side. Unlike the configuration of FIG. 5, the partition portion 9 may be connected to the turntable portion 2 side and may not be connected to the floor surface portion 1 side. The partition portion 9 divides the annular gap 3 into at least two annular pieces in plan view. And the conductor 8 is each arrange | positioned in the clearance gap 3 of the said each divided annular piece.

By adopting the configuration of FIG. 5, even if the turntable portion 2 is rotated and the conductor 8 rolls and moves in the gap 3, it is possible to completely dispose the conductor 8 in the entire gap 3. Can be prevented. In other words, each conductor 8 freely rolls and moves within the gap 3 between the annular pieces in which the conductors 8 are disposed.

It should be noted that one conductor 8 may be disposed in the gap 3 between each divided annular piece, or two or more conductors 8 may be disposed.

As described above, in the turntable device according to the present embodiment, the turntable device is disposed so as to come into contact with both the floor surface portion 1 and the turntable portion 2 and maintains the contact when the turntable portion 2 rotates. The electric conductor 8 which rolls with respect to the floor surface part 1 and also rolls with respect to the turntable part 2 is provided.

As described above, the conduction mechanism according to the present embodiment is configured by the conductor 8 that rolls in the gap 3, and does not have a fixed shaft or the like, and wear of the conductor 8 that simply rolls is very small. Therefore, in the present embodiment, wear of the conduction mechanism can be suppressed, and stable equipotentialization between the floor portion 1 and the turntable portion 2 can be maintained over a long period.

Further, the conductor 8 is not fixed in any of the floor portion 1 and the turntable portion 2 and rolls with respect to both 1 and 2. Therefore, there is no wear on the fixing portion for fixing the conductor 8 (for example, a roller on which the conductor 8 rotates, a rotating shaft for rotating the roller, etc.), and maintenance of the fixing portion is not required. . That is, it contributes to simplification of configuration, ease of maintenance, and cost reduction.

In this embodiment, a plurality of conductors 8 are arranged in the gap 3. Accordingly, the floor surface portion 1 and the turntable portion 2 can be electrically connected to each other at a plurality of locations, and the same electric potential between the floor surface portion 1 and the turntable portion 2 can be improved. Moreover, the electromagnetic wave shielding effect in the gap 3 is also improved.

Further, in the present embodiment, as shown in FIGS. 3 and 4, the conductor 8 is arranged in the tapered gap 3 whose width becomes narrower as it goes downward.

Thus, in the configuration illustrated in FIGS. 3 and 4, the configuration of the conduction mechanism is extremely simple. As a result, the cost of the conduction mechanism can be reduced, and since the configuration is simple, maintenance is also facilitated.

Further, since the conductor 8 is a sphere, the conductor 8 can smoothly roll in the gap 3, the influence of electromagnetic wave measurement / test on the test body can be reduced, and wear of the conduction mechanism can be further reduced. Reduction is possible.

Further, as shown in FIG. 4, the upper portion of the conductor 8 that is a sphere is located lower than the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2.

Therefore, even if the test body is dragged (or rolled) between the floor surface portion 1 and the turntable portion 2, the contact between the conductor 8 arranged in the gap 3 and the contact is suppressed / prevented. it can. Further, since the conductor 8 does not protrude from the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2, it is possible to prevent an external force from being applied to the conductor 8 from above. Therefore, the conductor 8 can also be prevented from sinking into the gap 3 due to the external force.

Further, as shown in FIG. 5, at least a plurality of partition portions 9 connected to only one side of the floor surface portion 1 and the turntable portion 2 are disposed in the annular gap 3. The annular gap 3 is partitioned into a plurality of annular pieces by the arrangement of the partition portion 9.

By arranging the conductor 8 in each of the divided gaps 3, even if the turntable portion 2 is rotated and the conductor 8 rolls and moves in the gap 3, the conductor 8 is biased in the entire gap 3. Can be completely prevented.

<Embodiment 2>
FIG. 6 is a cross-sectional view illustrating a configuration of a conduction mechanism included in the turntable device according to the present embodiment. Here, FIG. 6 is an enlarged view showing a part of the gap 3 shown in FIGS. 1 and 2 (including a part of the peripheral configuration).

As shown in FIG. 6, a conductor 8 is provided as a conduction mechanism. The conductor 8 is disposed so as to contact both the floor surface portion 1 and the turntable portion 2. And when the turntable part 2 rotates, the conductor 8 rolls with respect to the floor surface part 1, and also rolls with respect to the turntable part 2, maintaining the said contact. That is, the conductor 8 is not fixed anywhere, and can freely roll in the gap 3 (more specifically, in the conductor mounting portion 12 described later). The specific configuration of the present embodiment is as follows.

In the present embodiment, the floor portion 1 is composed of a main body portion 1A and a first member 1B, and the turntable portion 2 is composed of a main body portion 2A and a second member 2B.

The main body 1A has a flat plate shape having a predetermined thickness, and the main body 2A has a disk shape having a predetermined thickness. In the plan view of FIG. 1, the entire portion that can be viewed from above the floor portion 1 is the main body portion 1A, and the entire portion that can be viewed from above the turntable portion 2 is the main body portion 2A. Note that a part of the first member 1 </ b> B and a part of the second member 2 </ b> B are visible from above in the lower part of the gap 3.

Here, in the configuration illustrated in FIG. 6, the thickness of the main body 1A and the thickness of the main body 2A are the same. The main body 1A and the main body 2A are both conductive, and the first member 1B and the second member 2B are both conductive.

In the configuration example of FIG. 6, the first member 1B is composed of an overhang portion 1Ba, an extended portion 1Bb, and a fixed portion 1Bc. Consists of.

The fixed portion 1Bc is connected and fixed to the lower surface side of the main body 1A near the gap 3. By the connection and fixation, the main body 1A and the first member 1B are electrically connected. A fixed portion 2Bc is connected and fixed to the lower surface side of the main body 2A near the gap 3. The main body 2A and the second member 2B are electrically connected by the connection fixing.

The first member 1B has an extending portion 1Bb extending downward, one end of the extending portion 1Bb is connected to the fixed portion 1Bc, and the other end of the extending portion 1Bb is , Connected to the overhang portion 1Ba.

The second member 2B has an extending portion 2Bb extending downward, one end of the extending portion 2Bb is connected to the fixed portion 2Bc, and the other end of the extending portion 2Bb is , Connected to the overhang portion 2Ba.

Both the overhang portion 1Ba and the overhang portion 2Ba protrude toward the gap 3 side. Here, the end portion of the overhang portion 1Ba and the end portion of the overhang portion 2Ba face each other with the small slit 11 therebetween.

In the configuration example of FIG. 7, the dimension protruding to the gap 3 side of the overhang portion 1Ba is the same as the dimension protruding to the gap 3 side of the overhang portion 2Ba. Further, as apparent from the above configuration and as shown in FIG. 6, the width of the small slit 11 in the left-right direction in FIG. 6 is smaller than the width of the gap 3 in the left-right direction in FIG.

Here, as shown in FIG. 1, the gap 3 is annular, and the first member 1 </ b> B and the second member 2 </ b> B having the cross-sectional configuration of FIG. 6 are arranged in a circular shape along the annular shape. ing.

The conductor mounting portion 12 having a concave cross-sectional shape is formed below the gap 3 by the first member 1B having the above configuration and the second member 2B having the above configuration (see FIG. 6). That is, the conductor placing portion 12 formed by the first member 1B and the second member 2B is disposed below the gap 3 (the space 5 side below the floor surface).

Here, as described above, a small slit 11 having a width smaller than the width of the gap 3 is formed at the bottom of the concave conductor mounting portion 12 (see FIG. 6). In other words, due to the presence of the small slit 11, the first member 1B and the second member 2B are not in direct contact.

Further, in the present embodiment, the conductor 8 is arranged so as to close the small slit 11 in the conductor mounting portion 12. That is, the conductor 8 is completely contained in the conductor placing portion 12 formed below the floor surface. Here, in the configuration illustrated in FIG. 6, the conductor 8 is a sphere. The conductor 8 is in contact with the first member 1B and the second member 2B in the conductor mounting portion 12. By the contact, the floor portion 1 and the turntable portion 2 are electrically connected via the conductor 8.

Here, the conductor 8 is made of a conductive material such as copper, brass or iron. The diameter of the conductor 8 that is a sphere is, for example, about several mm. The conductor 8 has a size that can be accommodated in the conductor mounting portion 12. That is, the conductor 8 is smaller than the width of the conductor placement portion 12 in the horizontal direction in FIG. 6 and larger than the width of the small slit 11.

The conductor 8 is in contact with both the vicinity of the small slit 11 of the first member 1B constituting the floor surface portion 1 and the vicinity of the small slit 11 of the second member 2B constituting the turntable portion 2. Has been placed. And when the turntable part 2 rotates, while the said contact is maintained, while the conductor 8 rolls with respect to the floor surface part 1 (more specifically, 1st member 1B), the turntable part 2 (more concretely). Thus, it also rolls against the second member 2B).

Also in this embodiment, there are a plurality of conductors 8, and the conductors 8 are arranged side by side along the circumferential direction in the annular gap 3 shown in the plan view of FIG. . Here, the adjacent conductors 8 may be in contact with each other, or the adjacent conductors 8 may be spaced apart.

In addition, it is desirable to increase the number of the conductors 8 and arrange the conductors 8 in a dense state in the annular conductor mounting portion 12. Thereby, even if the turntable part 2 is rotated and the conductor 8 rolls and moves in the conductor placing part 12, the conductor 8 is biased to a limited area in the entire conductor placing part 12. Arrangement can be suppressed.

Further, similarly to FIG. 5, a plurality of partition portions may be evenly arranged in the annular conductor mounting portion 12. The partition portion is connected to the floor surface portion 1 side (more specifically, the first member 1B side), and the turntable portion 2 side (more specifically, the second member 2B side). Not connected. Alternatively, the partition portion is connected to the turntable portion 2 side (more specifically, the second member 2B side), and the floor surface portion 1 side (more specifically, the first member 1B side) and Is not connected. The partition part partitions the conductor mounting part 12 which is annular in plan view into at least two or more annular pieces. And the conductor 8 is arrange | positioned in each conductor mounting part 12 of the said annular piece divided | segmented, respectively.

Even if the turntable portion 2 is rotated and the conductor 8 rolls and moves in the conductor placing portion 12 by arranging the partition portion, the conductor 8 is biased in the entire conductor placing portion 12. It can be completely prevented from being arranged. That is, each conductor 8 freely rolls and moves within the conductor mounting portion 12 of the annular piece in which the conductor 8 is disposed.

It should be noted that one conductor 8 may be disposed in the conductor mounting portion 12 of each divided annular piece, or two or more conductors 8 may be disposed.

As described above, the turntable device according to the present embodiment is also arranged so as to be in contact with both the floor surface portion 1 and the turntable portion 2, and maintains the contact when the turntable portion 2 rotates. However, the conductor 8 which rolls with respect to both 1 and 2 is provided.

Therefore, similarly to the turntable device according to the first embodiment, wear can be suppressed also in the conduction mechanism according to the present embodiment. Therefore, stable equipotentialization of the floor surface portion 1 and the turntable portion 2 can be maintained in the long term.

Further, the conductor 8 is not fixed in any of the floor portion 1 and the turntable portion 2 and rolls with respect to both 1 and 2. Therefore, wear of the fixing part for fixing the conductor 8 does not occur, and maintenance of the fixing part becomes unnecessary. That is, it contributes to simplification of configuration, ease of maintenance, and cost reduction.

Also in the present embodiment, a plurality of conductors 8 are arranged in the conductor mounting portion 12. Accordingly, the floor surface portion 1 and the turntable portion 2 can be electrically connected to each other at a plurality of locations, and the same electric potential between the floor surface portion 1 and the turntable portion 2 can be improved. Moreover, the electromagnetic wave shielding effect in the gap 3 is also improved.

Also in the present embodiment, since the conductor 8 is a sphere, the conductor 8 can be smoothly rolled in the conductor mounting portion 12, and the influence of electromagnetic wave measurement / test on the specimen can be reduced. it can. Further, the wear of the conduction mechanism can be further reduced.

Moreover, in this Embodiment, as shown in FIG. 6, the floor surface part 1 has the 1st member 1B which has electroconductivity, and the turntable part 2 has 2nd member 2B which has electroconductivity. have. And the conductor mounting part 12 is formed under the gap 3 by the first member 1B and the second member 2B. Here, a small slit 11 having a width smaller than the width of the gap 3 is formed at the bottom of the conductor mounting portion 12 so that the first member 1B and the second member 2B do not directly contact each other. Yes.

By arranging the conductor 8 so as to block a part of the small slit 11 in the conductor mounting portion 12, a conduction mechanism with a simple configuration can be realized. As a result, the cost of the conduction mechanism can be reduced, and since the configuration is simple, maintenance is also facilitated.

Further, as shown in FIG. 6, the conduction mechanism (the spherical conductor 8 and the first and second members 1B and 2B) are disposed below the gap 3 (that is, on the space 5 side). Therefore, even if the specimen is dragged (or rolled) between the floor 1 and the turntable 2, contact between the conductive mechanisms 1B, 2B, 8 and the specimen is completely prevented. can do.

Also in the present embodiment, a plurality of partition portions connected to only one side of the floor portion 1 and the turntable portion 2 are disposed in the annular conductor mounting portion 12, The annular conductor mounting portion 12 is partitioned into a plurality of annular pieces by arranging the partition portion.

Even if the conductor 8 is arranged in each of the partitioned conductor placement parts 12, the turntable part 2 is rotated and the conductor 8 rolls and moves in the conductor placement part 12, the conductors. In the whole mounting part 12, it can prevent completely that the conductor 8 is biased.

<Embodiment 3>
In the present embodiment, a collar 15 is added to the turntable device according to the second embodiment. FIG. 7 is a cross-sectional view illustrating a configuration of a conduction mechanism included in the turntable device according to the present embodiment. FIG. 7 is an enlarged view showing a part of the gap 3 shown in FIGS. 1 and 2 (including a part of the peripheral configuration).

As can be seen from a comparison between FIG. 6 and FIG. 7, the turntable device according to the present embodiment is additionally provided with a flange 15. As shown in FIG. 7, the flange portion 15 covers the conductor mounting portion 12 from above. In addition, the collar part 15 is comprised from resin etc. which do not have electroconductivity, for example.

Here, in the configuration example of FIG. 7, the flange portion 15 is connected to the floor surface portion 1 side and is not connected to the turntable portion 2 side. In addition, unlike the structure of FIG. 7, the collar part 15 is connected to the turntable part 2 side, and does not need to be connected to the floor surface part 1 side.

Further, in the configuration example of FIG. 7, the flange portion 15 is connected to the external 1A side, but unlike the configuration of FIG. 7, the flange portion 15 may be connected to the first member 1B side. Also, in the case where the flange portion 15 is connected to the turntable portion 2 side, the flange portion 15 may be connected to the main exterior 2A side, or the flange portion 15 is connected to the second member 2B side. It may be connected.

Here, as shown in FIG. 1, the gap 3 has an annular shape, and the first member 1 </ b> B, the second member 2 </ b> B, and the flange portion 15 having the cross-sectional configuration of FIG. It is arranged.

As described above, the turntable device according to the present embodiment includes the flange portion 15 that covers the conductor placement portion 12 from above.

Therefore, it is possible to prevent / suppress dust and the like from entering the conductor mounting portion 12. Therefore, dust accumulates on the bottom of the conductor placing portion 12, and the electrical connection between the first member 1B and the conductor 8 and the electrical connection between the second member 2B and the conductor 8 are hindered. However, it can be prevented / suppressed. Furthermore, complicated and difficult maintenance for removing dust adhering to the bottom of the conductor placing portion 12 is not required.

Moreover, by making the collar part 15 made of resin, it is possible to prevent the collar part 15 from functioning as an antenna for receiving electromagnetic waves.

<Embodiment 4>
FIG. 8 is a cross-sectional view showing a configuration of a conduction mechanism provided in the turntable device according to the present embodiment. Here, FIG. 8 is an enlarged view showing a part of the gap 3 shown in FIGS. 1 and 2 (including the peripheral structure of the part).

As shown in FIG. 8, a conductor 8A is provided as a conduction mechanism. The conductor 8A is disposed so as to contact both the floor surface portion 1 and the turntable portion 2. And when the turntable part 2 rotates, the conductor 8A rolls with respect to the floor surface part 1, and also rolls with respect to the turntable part 2, maintaining the said contact. That is, the conductor 8A is not fixed anywhere and can freely roll in the gap 3. Here, in the present embodiment, the conductor 8A has a truncated cone shape.

The frustoconical shape is a trapezoid whose section is symmetrical, and is composed of a circular top surface and a circular bottom surface. (In general, in the truncated cone shape, a circular shape having a large diameter out of two circular portions is referred to as a “bottom surface” and a circular shape having a small diameter is referred to as an “upper surface”. In, the same treatment is performed). A more specific configuration of the conduction mechanism according to the present embodiment is as follows.

In the present embodiment, the floor portion 1 is composed of a main body portion 1L and a first member 1N, and the turntable portion 2 is composed of a main body portion 2L and a second member 2N.

The main body 1L has a flat plate shape having a predetermined thickness, and the main body 2L has a disk shape having a predetermined thickness. In the plan view of FIG. 1, the entire portion visible from above the floor surface portion 1 is the main body portion 1L, and the entire portion visible from above the turntable portion 2 is the main body portion 2L. In the gap 3, a part of the first member 1N and a part of the second member 2N are visible from above. Here, in the configuration illustrated in FIG. 8, the thickness of the main body 1L and the thickness of the main body 2L are the same.

Further, the first member 1N has a flat plate shape having a predetermined thickness, and the second member 2B also has a flat plate shape having a predetermined thickness. Here, in the configuration illustrated in FIG. 8, the thickness of the first member 1N and the thickness of the second member 2N are the same.

Further, both the main body 1L and the main body 2L have conductivity, and both the first member 1N and the second member 2N have conductivity.

The first member 1N is connected and fixed to the lower surface side of the main body 1L near the gap 3. By the connection fixing, the main body 1L and the first member 1N are electrically connected. A second member 2N is connected and fixed to the lower surface side of the main body 2L near the gap 3. By the connection fixing, the main body 2L and the second member 2N are electrically connected.

In the configuration example of FIG. 8, the end of the first member 1N projects to the gap 3 side from the end of the main body 1L, and the end of the second member 2N is the end of the main body 2L. Rather than the gap 3 side. Here, in the configuration example of FIG. 8, the dimension protruding to the gap 3 side of the first member 1N and the dimension protruding to the gap 3 side of the second member 2N are the same.

As shown in FIG. 8, since there is a gap 3 between the floor portion 1 and the turntable portion 2, the main body portion 1L and the main body portion 2L are not connected, and the first member 1N and the first member 1 The second member 2N is not connected.

Here, as shown in FIG. 1, the gap 3 has an annular shape, and the first member 1N and the second member 2N having the cross-sectional configuration of FIG. 8 are arranged in a circular shape along the annular shape. ing.

With this configuration, that is, the peripheral end portion configuration of the floor surface portion 1 and the peripheral end portion configuration of the turntable portion 2, a step-shaped gap 3 is formed such that the width becomes narrower in the downward direction ( (See FIG. 8).

In the present embodiment, the conductor 8A is disposed in the gap 3 having the step shape. Here, as shown in the enlarged view of FIG. 9, in the present embodiment, the conductor 8A has a truncated cone shape. In the gap 3, the conductor 8 </ b> A is in contact with the peripheral end portion of the floor surface portion 1 and the peripheral end portion of the turntable portion 2. By the contact, the floor surface portion 1 and the turntable portion 2 are electrically connected via the conductor 8A.

8, the upper surface 8a of the truncated cone-shaped conductor 8A is on the lower side in the gap 3, and the bottom surface 8d of the truncated cone-shaped conductor 8A is on the upper side in the gap 3. Here, the bottom surface 8 d of the conductor 8 </ b> A is located at a position lower than the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2.

Here, the conductor 8A is made of a conductive material such as copper, brass or iron. Further, the conductor 8A has a size that fits in the gap 3. For example, the diameter of the upper surface 8a and the bottom surface 8d of the conductor 8A is about several mm. Here, as shown in FIG. 9, the diameter of the upper surface 8a of the conductor 8A is smaller than the diameter of the bottom surface 8d of the conductor 8A.

8, the diameter of the bottom surface 8d is smaller than the distance between the main body 1L and the main body 2L and larger than the distance between the first member 1N and the second member 2N. The diameter of the upper surface 8a is smaller than the distance between the first member 1N and the second member 2N.

The conductor 8A is disposed so as to come into contact with both the peripheral end portion of the floor surface portion 1 and the peripheral end portion of the turntable portion 2. And when the turntable part 2 rotates, the conductor 8A is the peripheral end part of the floor surface part 1 (more specifically, the periphery of the first member 1N constituting the floor surface part 1 while maintaining the contact). It rolls with respect to the peripheral end portion of the turntable portion 2 (more specifically, the peripheral end portion of the second member 2N constituting the turntable portion 2).

Also in the present embodiment, there are a plurality of conductors 8A, and the conductors 8A are arranged side by side along the circumferential direction in the annular gap 3 shown in the plan view of FIG. . Here, the adjacent conductors 8A may be in contact with each other, or the adjacent conductors 8A may be spaced apart.

Note that it is desirable to increase the number of conductors 8A and arrange the conductors 8A in a dense state in the annular gap 3. Thereby, even if the turntable 2 is rotated and the conductor 8A rolls and moves in the gap 3, the conductor 8A can be prevented from being biasedly arranged in a limited region in the entire gap 3.

Further, similarly to FIG. 5, a plurality of partition portions may be evenly arranged in the annular gap 3. The partition portion is connected to the floor surface portion 1 side and is not connected to the turntable portion 2 side. Or the partition part is connected to the turntable part 2 side, and is not connected with the floor surface part 1 side. The partition section partitions the annular gap 3 into at least two or more annular pieces in plan view. Then, conductors 8A are arranged in the gaps 3 of the partitioned annular pieces.

By disposing the partition portion, even if the turntable portion 2 is rotated and the conductor 8A rolls and moves in the gap 3, the conductor 8A is completely prevented from being biased in the entire gap 3. it can. In other words, each conductor 8A freely rolls and moves within the gap 3 between the annular pieces on which the conductors 8A are disposed.

It should be noted that one conductor 8A may be arranged in the gap 3 of each divided annular piece, or two or more conductors 8A may be arranged.

8, when the turntable portion 2 rotates, the side surface portion of the conductive portion 8A rolls at the side surface portion while being connected to the floor surface portion 1 and the turntable portion 2.

As described above, the turntable device according to the present embodiment is also arranged so as to be in contact with both the floor surface portion 1 and the turntable portion 2, and maintains the contact when the turntable portion 2 rotates. However, the electric conductor 8A which rolls with respect to both 1 and 2 is provided.

Therefore, similarly to the turntable device according to the first embodiment, wear can be suppressed also in the conduction mechanism according to the present embodiment. Therefore, stable equipotentialization of the floor surface portion 1 and the turntable portion 2 can be maintained in the long term.

Further, the conductor 8A is not fixed in any of the floor portion 1 and the turntable portion 2, and rolls with respect to both 1 and 2. Therefore, wear of the fixing part for fixing the conductor 8A does not occur, and maintenance of the fixing part becomes unnecessary. That is, it contributes to simplification of configuration, ease of maintenance, and cost reduction.

Also in the present embodiment, a plurality of conductors 8A are arranged in the gap 3. Accordingly, the floor surface portion 1 and the turntable portion 2 can be electrically connected to each other at a plurality of locations, and the same electric potential between the floor surface portion 1 and the turntable portion 2 can be improved. Moreover, the electromagnetic wave shielding effect in the gap 3 is also improved.

In this embodiment, the conductor 8A has a truncated cone shape and is disposed in the gap 3.

Therefore, also in this embodiment, the configuration of the conduction mechanism is extremely simple. As a result, the cost of the conduction mechanism can be reduced, and since the configuration is simple, maintenance is also facilitated. Further, since the conductor 8A has a truncated cone shape, the conductor 8A can smoothly roll in the gap 3. Therefore, the influence of the electromagnetic wave measurement / test on the specimen can be reduced. Further, the wear of the conduction mechanism can be further reduced.

Further, in the present embodiment, a staircase-shaped gap 3 is formed by the peripheral end portion of the floor surface portion 1 and the peripheral end portion of the turntable portion 2 so that the width becomes narrower as it goes downward. . The upper surface 8a of the conductor 8A is on the lower side of the gap 3, and the bottom surface 8d of the conductor 8A is at a position lower than the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2.

Therefore, even if the test body is dragged (or rolled) between the floor surface portion 1 and the turntable portion 2, contact between the conductor 8A disposed in the gap 3 and the test body is suppressed.・ Can be prevented. Moreover, since the conductor 8A does not protrude from the upper surface of the floor surface portion 1 and the upper surface of the turntable portion 2, it is possible to prevent external force from being applied to the conductor 8A from above. Therefore, the conductor 8A can also be prevented from sinking into the gap 3 due to the external force.

Also in the present embodiment, a plurality of partition portions connected to only one of the floor surface portion 1 and the turntable portion 2 are disposed in the annular gap 3, and the partition portions are arranged. Accordingly, the annular gap 3 is partitioned into at least two or more annular pieces.

Even if the conductor 8A is disposed in each of the divided gaps 3 and the turntable portion 2 is rotated and the conductor 8A rolls and moves in the gap 3, the conductor 8A is biased in the gap 3 as a whole. Can be completely prevented.

Moreover, even if the conductor 8A rolls due to the presence of the partition portion, it is possible to prevent the conductor 8A from tilting in the gap 3 that hinders the rolling. That is, the partition portion can prevent an unintended inclination of the truncated conical conductor 8A.

<Embodiment 5>
FIG. 10 is a cross-sectional view illustrating a configuration of a conduction mechanism included in the turntable device according to the present embodiment. Here, FIG. 10 is an enlarged view showing a part of the gap 3 shown in FIGS. 1 and 2 (including a part of the peripheral configuration).

As shown in FIG. 10, a conductor 8 is provided as a conduction mechanism. The conductor 8 is disposed so as to contact both the floor surface portion 1 and the turntable portion 2. And when the turntable part 2 rotates, the said conductor 8 rolls also with respect to the floor table part 1 and also with respect to the turntable part 2, maintaining the said contact. That is, although the conductor 8 is gripped, the conductor 8 can freely roll in the space formed by the depressions 25 and 26 described later. A more specific configuration of the present embodiment is as follows.

In the present embodiment, the floor portion 1 is composed of a main body portion 1P and a first member 1Q, and the turntable portion 2 is composed of a main body portion 2P and a second member 2Q.

The main body 1P has a flat plate shape having a predetermined thickness, and the main body 2P has a disk shape having a predetermined thickness. In the plan view of FIG. 1, the entire portion visible from above the floor portion 1 is the main body portion 1P, and the entire portion visible from above the turntable portion 2 is the main body portion 2P. Here, below the gap 3, a part of the second member 2Q is visible from above.

In the configuration illustrated in FIG. 10, the thickness of the main body 1P and the thickness of the main body 2P are the same. Moreover, both the main-body part 1P and the main-body part 2P have electroconductivity, and both the 1st member 1Q and the 2nd member 2Q have electroconductivity.

In the configuration example of FIG. 10, the first member 1 </ b> Q has a flat portion and a first recess 25. Here, the cross-sectional shape of the first depression 25 is an arc shape (that is, rounded). The flat surface portion of the first member 1Q is fixed to the lower surface of the main body portion 1P in the vicinity of the gap 3. In addition, the 1st hollow 25 is formed in the side facing a plane part.

In the configuration example of FIG. 10, the second member 2 </ b> Q includes an extending portion 20 having an L-shaped cross section, an elastic member 21, and a grip portion 22.

One end of the extended portion 20 is fixed to the lower surface of the main body portion 2P near the gap 3. Further, as illustrated in FIG. 10, the extending portion 20 extends from the main body portion 2 </ b> P to the lower portion of the main body portion 1 </ b> P so as to exist below the gap 3. Near one end of the extended portion 20, one end of the elastic member 21 is connected.

Here, the elastic member 21 biases the gripping force of the conductor 8 by the first member 1Q and the gripping portion 22. In addition, a grip portion 22 is connected to the other end of the elastic member 21. A second recess 26 is provided on the side of the grip portion 22 that faces the first member 1Q. Here, the cross-sectional shape of the second depression 26 is an arc shape (that is, rounded).

The main body 1P and the first member 1Q are electrically connected, and the main body 2P and the second member 2Q are electrically connected. In the second member 2Q, the extending portion 20, the elastic member 21, and the grip portion 22 are electrically connected. Therefore, the floor surface portion 1 and the turntable portion 2 are electrically connected by the state in which the conductor 8 is gripped by the first member 1Q and the second member 2Q (more specifically, the grip portion 22). (That is, the floor portion 1 and the turntable portion 2 are electrically connected via the conductor 8).

Further, as can be seen from the above description and FIG. 10, the structure composed of the first member 1 </ b> Q and the second member 2 </ b> Q that holds the conductor 8 has the gap 3 from below (space 5). Covering from the side).

The conductor 8 is a sphere, and the conductor 8 is formed by the first depression 25 of the first member 1Q and the second depression 26 of the second member 2Q (more specifically, the grip portion 22). It is gripped (see FIG. 10). As described above, the second member 2Q includes the elastic member 21 that biases the grip of the conductor 8.

Here, as shown in FIG. 1, the gap 3 has an annular shape, and the structure composed of the first member 1 </ b> Q and the second member 2 </ b> Q having the sectional configuration of FIG. It is arranged in a circular shape. Therefore, the space formed by the first recess 25 and the second recess 26 facing each other is naturally annular.

The conductor 8 is made of a conductive material such as copper, brass or iron. The diameter of the conductor 8 that is a sphere is, for example, about several mm. An annular space is formed in a state where the first depression 25 and the second depression 26 are joined together, but the conductor 8 is slightly larger than the dimension in the holding direction of the space. Therefore, in the state where the conductor 8 is gripped by the first member 1Q and the second member 2Q, the first member 1Q and the second member 2Q (more specifically, the grip portion 22) are On the facing side, a small gap exists between the members 1Q and 2Q (see FIG. 10).

The conductor 8 is disposed so as to be in contact with both the first member 1Q constituting the floor surface portion 1 and the second member 2Q constituting the turntable portion 2. And when the turntable part 2 rotates, the conductor 8 is the floor surface part 1 (more specifically, the 1st hollow 25 of the 1st member 1Q which comprises the floor surface part 1), maintaining the said contact. ) With respect to the turntable portion 2 (more specifically, the second depression 26 of the gripping portion 22 which is a component of the second member 2Q constituting the turntable portion 2). Also rolls.

Also in the present embodiment, there are a plurality of conductors 8, and along the circumferential direction in an annular space formed in a state where the first recess 25 and the second recess 26 are combined. Thus, the conductors 8 are arranged side by side. Here, the adjacent conductors 8 may be in contact with each other, or the adjacent conductors 8 may be spaced apart.

As can be seen from the configuration, when the turntable portion 2 rotates, the plurality of conductors 8 roll like bearings in the annular space.

In addition, it is desirable to increase the number of the conductors 8 and arrange the conductors 8 in a dense state in the annular space. Thereby, even if the turntable part 2 is rotated and the conductor 8 rolls and moves in the annular space, the conductor 8 is biased and arranged in a limited region in the entire annular space. Can be suppressed.

Moreover, a partition portion may be disposed in the annular space. The partition portion is connected to the floor surface portion 1 side (more specifically, the first member 1Q side), and is connected to the turntable portion 2 side (more specifically, the grip portion 22 side). Not. Alternatively, the partition portion is connected to the turntable portion 2 side (more specifically, the holding portion 22 side) and connected to the floor surface portion 1 side (more specifically, the first member 1Q side). It has not been. The partition section divides the annular space into at least two or more annular pieces in plan view. Then, the conductor 8 is arranged in each of the divided areas.

By disposing the partition portion, even if the turntable portion 2 is rotated and the conductor 8 rolls and moves in the annular space, the conductor 8 is unevenly arranged in the entire annular space. Can be completely prevented. That is, each conductor 8 can freely roll and move within the region of the annular piece in which it is disposed.

It should be noted that one conductor 8 may be arranged in the region of each divided annular piece, or two or more conductors 8 may be arranged.

Further, the annular space has a bead shape, and the spherical conductors 8 may be disposed in each of the bead-shaped regions.

As described above, the turntable device according to the present embodiment is also arranged so as to be in contact with both the floor surface portion 1 and the turntable portion 2, and maintains the contact when the turntable portion 2 rotates. However, the conductor 8 which rolls with respect to both 1 and 2 is provided.

Therefore, similarly to the turntable device according to the first embodiment, wear can be suppressed also in the conduction mechanism according to the present embodiment. Therefore, stable equipotentialization of the floor surface portion 1 and the turntable portion 2 can be maintained in the long term.

The conductor 8 is gripped in an annular space formed by the first recess 25 and the second recess 26 facing each other, but freely rolls in the annular space. Can do. Thus, also in this Embodiment, it does not have the member (namely, rotation fixed shaft) which the rolling of the conductor 8 supports. Therefore, the rotating fixed shaft does not wear and maintenance of the rotating fixed shaft becomes unnecessary. That is, it contributes to simplification of configuration, ease of maintenance, and cost reduction.

Also in the present embodiment, a plurality of conductors 8 are arranged in the annular space. Accordingly, the floor surface portion 1 and the turntable portion 2 can be electrically connected to each other at a plurality of locations, and the same electric potential between the floor surface portion 1 and the turntable portion 2 can be improved.

Also in the present embodiment, since the conductor 8 is a sphere, the conductor 8 can smoothly roll in the annular space, and the influence on the electromagnetic wave measurement / test is reduced and the conduction mechanism is further worn. Reduction is possible.

Further, in the present embodiment, the structure constituted by the first member 1Q and the second member 2Q that holds the conductor 8 covers the gap 3 from below.

Therefore, electromagnetic waves generated by the motor 4 or the like can be prevented from entering the room 50 from the space 5 through the gap 3. That is, in the invention according to the present embodiment, the electromagnetic wave shielding effect in the gap 3 is significantly improved.

In the case of the configuration shown in FIG. 10, the first member 1Q and the second member 2Q (more specifically, in a state where the conductor 8 is gripped by the first member 1Q and the second member 2Q). In addition, the gap with the gripping part 22) can be designed extremely small. This is different from the turntable portion 2 and the floor surface portion 1 of 10 m or more, and the dimensions of the first member 1Q and the second member 2Q are several mm to several cm, and the diameter of the conductor 8 is also several. This is because the processing accuracy is easily improved with these small members, and the gap can be reduced to about 1 mm or less (that is, the conductor 8 or the like is larger than the large member such as the main body portion 2P of the turntable portion 2). Smaller members are easier to improve processing accuracy).

For example, in order to prevent contact between the floor surface portion 1 and the turntable portion 2 (main body portion 2P) when the turntable portion 2 having a diameter of about 10 m is rotated, the above-described turntable portion 2 (main body portion 2P) Considering the ease of improving the processing accuracy in terms of dimensions, the width of the gap 3 is about 6 to 7 mm. On the other hand, when processing the conductor 8 that is a sphere of about several millimeters and a member (about several millimeters) that grips the conductor 8, the processing accuracy is greatly improved, and the gap is 1 mm or less. It becomes possible to do.

Therefore, in the configuration of FIG. 10, since the gap can be reduced, electromagnetic wave intrusion from the space 5 to the room 50 through the gap can be considerably suppressed. Note that the minimum gap is not enlarged by the biasing force of the elastic member 21.

Further, as shown in FIG. 10, the conductor 8 that is a sphere and the structure that holds the conductor 8 are disposed below the main body portions 1P and 2P. Therefore, even if the test body is dragged (or rolled) between the floor surface section 1 and the turntable section 2, contact between the above-described structure and the test body can be completely prevented.

Further, in the turntable device according to the present embodiment, the conductor 8 is gripped by the first member 1Q and the grip portion 22 by the urging force of the elastic member 21. Therefore, contact between the conductor 8 and the floor portion 1 (more specifically, the first member 1Q) and contact between the conductor 8 and the turntable portion 2 (more specifically, the second member 2Q) Thus, even if the turntable unit 2 is rotated, the same potential can be reliably maintained in the floor surface unit 1 and the turntable unit 2 continuously.

Further, in the configuration example shown in FIG. 10, a configuration in which the conductor 8 is gripped by the first recess 25 and the second recess 26 is employed, and the gripping force of the conductor 8 is increased by the urging force of the elastic member 21. It is strengthening. Therefore, in the present embodiment, due to the configuration and shape shown in FIG. 10, dust or the like does not enter the portion that grips the conductor 8, and inhibition of the same potential due to the dust or the like can be prevented.

Also in the present embodiment, a plurality of partition portions connected to only one side of the floor portion 1 and the turntable portion 2 are disposed in an annular space composed of the depressions 25 and 26, By the arrangement of the partition part, the annular space is partitioned into at least two or more annular pieces.

Even if the conductor 8 is arranged in the space of each partitioned annular piece, the turntable portion 2 is rotated and the conductor 8 rolls and moves in the space of the annular piece, the annular space described above. As a whole, it is possible to completely prevent the conductors 8 from being biased.

In the present embodiment, the conductive portion 8 is gripped by using the biasing force of the elastic member 21 below the floor portion 1 (see FIG. 10). However, a configuration in which the conductor 8 is gripped using the biasing of the elastic member below the turntable portion 2 may be employed. In the case of the configuration, a member similar to the first member 1Q is connected to the lower surface of the main body portion 2P near the gap 3, and a member similar to the second member 2Q is connected to the lower surface of the main body portion 1P near the gap 3. Connected. And the member similar to the 2nd member 2Q is extended over the main-body part 2P from the main-body part 1P, and the elastic member and holding part which the same member as the 2nd member 2Q has are the main-body-part 2P side. It is arranged.

Although the present invention has been described in detail, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

For example, instead of the flange 15 shown in FIG. 7, a resin flange 15 shown in FIG. 11 may be adopted. In the configuration example shown in FIG. 11, the flange portion 15 has an L-shaped cross-sectional shape, and the flange portion 15 is connected to the upper surface of the main body portion 1A and extends over the upper surface of the main body portion 2A. In other words, in the configuration example of FIG. 11, the flange portion 15 completely covers the gap 3 from above. Here, in the configuration example shown in FIG. 11, the flange portion 15 is not connected to the turntable portion 2 side. In addition, the collar part 15 of the form shown in FIG. 11 may be connected to the main body part 2A side. In this case, the flange 15 is not connected to the main body 1A.

DESCRIPTION OF SYMBOLS 1 Floor part 1A, 1L, 1P Main body part 1B, 1N, 1Q 1st member 2 Turntable part 2A, 2L, 2P Main body part 2B, 2N, 2Q 2nd member 3 Crevice 4 Motor 5 Space 8, 8A Conductor DESCRIPTION OF SYMBOLS 9 Partition part 11 Small slit 12 Conductor mounting part 15 Eaves part 20 Extension part 21 Elastic member 22 Grasping part 25 1st hollow 26 2nd hollow 50 Indoor 100 Anechoic chamber

Claims (11)

A floor portion (1) having an electromagnetic wave shielding function, having an opening, and fixedly installed;
It has an electromagnetic wave shielding function and is arranged in the opening of the floor surface portion so as to form a gap (3) between the end of the floor surface portion in the horizontal direction and rotates with respect to the floor surface portion. Turntable (2),
It is arranged so as to contact both the floor surface portion and the turntable portion, and when the turntable portion rotates, it rolls with respect to the floor surface portion while maintaining the contact, and with respect to the turntable portion. It has a conductor (8, 8A) that rolls,
A turntable device characterized by that. The conductor is
Multiple,
The turntable device according to claim 1. By the peripheral end portion of the floor surface portion and the peripheral end portion of the turntable portion,
The taper-shaped gap is formed so that the width becomes narrower as it goes downward,
The conductor is
It is arranged in the gap which is the taper shape,
The turntable device according to claim 2. The conductor is
A sphere,
The turntable device according to claim 3. The upper part of the conductor, which is the sphere,
Located at a position lower than the upper surface of the floor surface portion and the upper surface of the turntable portion,
The turntable device according to claim 4, wherein The conductor is
A frustoconical shape, disposed within the gap,
The turntable device according to claim 2. By the peripheral end portion of the floor surface portion and the peripheral end portion of the turntable portion,
The step-shaped gap is formed so that the width becomes narrower as it goes downward,
An upper surface (8a) of the conductor having the truncated cone shape is
The lower side,
The bottom surface (8d) of the conductor having the truncated cone shape is
It exists in a position lower than the upper surface side of the floor surface portion and the upper surface side of the turntable portion,
The turntable device according to claim 6. The floor portion is
A first member (1B) having electrical conductivity;
The turntable section is
A second member (2B) having electrical conductivity;
By the first member and the second member,
A conductor placement portion (12) having a concave cross-sectional shape is formed below the gap,
By not directly contacting the first member and the second member,
A small slit (11) having a width smaller than the width of the gap is formed at the bottom of the conductor mounting portion having the concave shape,
The conductor is
In the conductor placement part, arranged to block a part of the small slit,
The turntable device according to claim 2. Further comprising a flange (15) that covers the conductor placement portion from above.
The turntable device according to claim 8. The conductor is
A sphere,
The floor portion is
A first member (1Q) having electrical conductivity and having a first depression (25);
The turntable section is
A second member (2Q) having electrical conductivity and having a second depression (26);
The conductor is
Gripped by the first recess of the first member and the second recess of the second member;
The second member is
An elastic member (21) for urging the holding of the conductor;
A structure constituted by the first member and the second member, which holds the conductor,
Covering the gap from below,
The turntable device according to claim 2. The space in which the conductor is disposed is
It is formed in an annular shape in plan view,
A partition part (9) connected to only one of the floor surface part and the turntable part;
The partition is
In plan view, the space in which the annular conductor is disposed is partitioned into at least two annular pieces,
The turntable device according to claim 2.

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