JPH04102073A - Transporting mechanism of measuring equipment and the like in electric wave dark room - Google Patents

Abstract

PURPOSE:To eliminate shielding of a large-area opening for carrying in and out by supporting a suspension device along a slit which is formed on a ceiling of a connected electric wave dark room main body and that of a room for storing measuring equipment so that the suspension device can be moved and by providing a door for carrying in and out on a boundary wall. CONSTITUTION:A storage room 6 of a measuring equipment is connected to the outside of a one-side wall 3 of an electric wave dark room main body 1 where electric wave absorbing bodies 5 are applied to a ceiling 2, a side wall 3, and a floor 4 and a door 7 is provided on the boundary wall 3. The door 7 has a sufficient area for enabling the absorbing bodies 5 to be provided on an inner wall at a side of the main body 1 and a pedestal 11 etc. to be suspended and passed at a height exceeding the absorbing body 5 of the floor 4. A slit 12 is formed on both ceilings of the main body 1 and the storage room 6. A cable 13 and a hook 14 which are connected to a hoist 15 goes downward through the slit 12 and is suspended at the pedestal 11. Therefore, when the pedestal 11 with an equipment 10 etc., is move between the main body 1 and the storage room 6, the door 7 may be opened, the pedestal 11 is lifted by the hook 14, and the hoist 15 may be moved. The door 7 and the slit 12 do not require shielding owing to the absorbing body 5.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the improvement of an anechoic chamber, and more specifically, the transport of necessary equipment such as measuring instruments and objects to be measured for experiments in the anechoic chamber according to the purpose of use. The present invention relates to a mechanism for transporting measurement equipment, etc., into an anechoic chamber.

(Prior Art) A facility called a radio anechoic chamber or a radio anechoic chamber is a room whose inner walls are lined with radio wave absorbers, and when conducting various experiments in this room, it is necessary to conduct various experiments in this room due to weather, external radio waves, buildings, etc. It is used for antenna directivity experiments and evaluation tests of electromagnetic noise emitted by electronic devices because it is not affected by obstacles and the radio waves are absorbed by walls and does not produce reflected waves.

By the way, in an experiment using an anechoic chamber, measuring equipment and
When replacing the antenna or electronic device to be measured with another one, first remove the radio wave absorber blocks from the ceiling, side walls, etc. of the anechoic chamber to form a large-area opening, and then spread it on the floor. A part of the radio wave absorber is removed, and then a crane or the like is inserted into the darkroom through the opening to replace the measuring equipment, etc., and once the replacement is complete, the radio wave absorber block is returned to its original position. There was a need.

However, conventional anechoic chambers that require loading and unloading using large cranes, etc. not only have poor workability when loading and unloading, but also require complicated mechanisms to completely shield the large opening. Therefore, a considerable amount of cost was required, and this cost was approximately proportional to the opening area.

From this point, a rail is laid on a line connecting the loading/unloading entrance provided on the side wall and the equipment grounding point on the floor, and the multiple absorber blocks located on the line are unloaded along the rail. A device has been proposed that facilitates the loading and unloading of equipment by allowing loading and unloading from the entrance (Special Publications Publication No. 63).
-64080).

Furthermore, Japanese Utility Model Publication No. 58-12479 discloses a configuration in which an equipment loading and unloading path is provided below the floor of the anechoic chamber, and equipment is loaded and unloaded in an elevator style through an opening provided at the equipment grounding point on the floor. ing.

However, in any of the anechoic chambers described in the above publications, the opening formed in the side wall for loading and unloading must have a sufficient area for loading and unloading measuring instruments, etc., so when closing the opening, Shielding is not easy, and it has been impossible to avoid increased costs due to the complexity of the shielding mechanism.

Furthermore, it was clear that the structure of the transport path for dividing the radio wave absorber constituting the floor surface into several blocks and loading and unloading the blocks through the loading and unloading openings would also be complicated and large.

(Object of the Invention) The present invention was made in view of the defects of conventional anechoic chambers as mentioned above, and does not require a shield for the large opening for carrying in and out of the measuring equipment shade. An object of the present invention is to provide a mechanism for transporting measurement equipment, etc. in an anechoic chamber, which can reduce the costs associated with this.

(Summary of the Invention) In order to achieve the above object, the present invention connects a measuring equipment storage chamber made of a conductive material to the outside of one side wall of the anechoic chamber main body whose inner wall is coated with a radio wave absorber, A door for carrying in and out is provided, and a suspension device such as a measuring device is movably supported along the ceiling surface of a slit formed from the ceiling of the anechoic chamber main body to the ceiling of the measuring device storage chamber,
Further, a space including the slit and the transfer device is sealed with a conductive shield material.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view and an enlarged cross-sectional view taken along the line A-A, showing an example of the configuration of an anechoic chamber to which the transport mechanism for measuring instruments, etc. of the present invention is applied.

In this figure (a), reference numeral 1 denotes the main body of a radio wave anechoic chamber, in which radio wave absorbers 5 are pasted around the ceiling 2, side walls 3, and floor 4 of a box whose large surface is made of a conductor.

An electromagnetically shielded room (hereinafter referred to as a measuring equipment storage room) 6 for storing various measuring instruments used in the anechoic chamber main body I is connected to the outside of one side wall 3 of the anechoic chamber main body I, A part of the boundary wall 3 between these two chambers 1 and 6 is used as a door 7 having a required area.

The measurement equipment storage chamber 6 is a metal box.

An entrance/exit rR9 of the minimum necessary size for workers to enter and exit is provided at a proper position on the side wall 8 to provide sufficient shielding.

In addition, it goes without saying that the rR, 7 for carrying in and out of the measuring instruments, etc. is covered with radio wave absorbers 5 on the inner wall of the dark room main body side, and the measuring instruments, etc. 10 and the pedestal 11 on which they are placed are placed on the floor surface. The side wall 3 is provided with sufficient height and width at appropriate positions so that it can be passed through while being lifted up to a height exceeding the radio wave absorber 5 on the side wall 3.

In the anechoic chamber configured as described above, a slit 12 is formed extending from the darkroom main body 1 to the ceiling of the equipment storage room 6 via a portion of the side wall 3 corresponding to the upper edge of the door 7 for carrying in and out of measuring equipment, etc. Then, a cable 13 for suspending the pedestal 11 on which the measuring equipment, etc. is placed, and a hook 14 provided at its tip are allowed to hang down through the slit 12 into the anechoic chamber main body 1 and the measuring equipment storage 6. . The cable 13
The other end is connected to the cable winding mechanism of a hoist 15 (not shown in detail), and the hoist 15 is connected to the anechoic chamber main body]
It is constructed so that it can run on a rail 16 arranged along the slit 12 on the ceiling surface of the measuring equipment storage room 6.

Note that 17 is simply a roof for protecting the rail 16 and the hoist 15 running along it from wind and rain.

Furthermore, the radio wave absorbers 5 installed on the ceiling of the measuring equipment storage room 6 are arranged in required rows along both sides of the slit 12 in the ceiling of the room 6 in order to prevent electromagnetic waves from entering through the slit 12. be.

As is clear from the figure, in the anechoic chamber configured as described above, when moving the pedestal 11 on which the measuring instruments etc. 10 are placed between the anechoic chamber main body 1 and the measuring instrument etc. storage chamber 6, simply All that is required is to open the door 7 that forms the boundary between the two rooms, lift the pedestal 11 to a required height using the hook 14 hanging from the hoist 15, and then move the hoist 15 to a predetermined position. It will be understood that almost no human effort is required.

By the way, when considering the completeness of the electromagnetic shielding in such an anechoic chamber, first of all, a slit 1 is provided in the ceiling between the anechoic chamber main body 1 and the measurement equipment storage chamber 6.
There seems to be a risk of electromagnetic waves entering from 2.
Since the radio wave absorbers 5 are densely planted on both sides of the slit 12, the above-mentioned danger can be suppressed to the extent that it does not become a problem in practice, and a door about the size of a manhole installed in the storage room for the measuring equipment, etc. If the shielding in step 9 is done perfectly, the anechoic chamber itself
Since a special shield is not required for the large-area door 7 constituting the boundary wall between the building and the building, a huge cost is not required to ensure complete shielding.

Although the basic embodiment of the present invention has been described above, when even more strict electromagnetic shielding is required, as shown in FIG.
It should be sealed tightly.

In this case, it would be better to screw the conductor cover 18 on a part of the back surface of the ceiling of the measuring equipment storage room 6, for example, to facilitate maintenance of the hoist 15.

Although the present invention has been described above using one embodiment thereof, it is obvious that the present invention is not limited only to this embodiment.

That is, the illustrated radio wave absorber 5 has ferrite powder dispersed in the most common hollow cone-shaped resin, and a ferrite plate is provided at the base of the resin. It may also be an absorbent material.

It is also obvious that the term "measuring equipment, etc." in the above description includes a device to be measured such as an antenna whose characteristics are to be measured.

(Effects of the Invention) Since the transport mechanism for measuring instruments, etc. in the anechoic chamber according to the present invention is configured as described above, it is possible to use a large surface 8I for carrying in and out measuring instruments, etc., which needs to be provided in the anechoic chamber body! Not only is it possible to significantly reduce the construction cost of the entire anechoic chamber since there is no need to apply special electromagnetic shielding to R, but the hoist can be freely moved from the anechoic chamber itself to the measurement equipment storage room. Therefore, almost no human power is required to move measuring instruments, etc., and it is extremely efficient in improving work efficiency and safety.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a partial sectional view showing an embodiment with improved electromagnetic shielding. l... Anechoic chamber body, 2... Ceiling, 3... Side wall,
4... Floor, 5... Radio wave absorber, 6... Storage room for measuring equipment, etc., 7... Door, ]0.11... Measuring equipment, etc., 1
2...Slit, 13...Hanging device, 15...Transfer device, 18...Conductor force bar

Claims (1)

[Scope of Claims] 1) An anechoic chamber body whose ceiling, side walls, and floor are covered with a radio wave absorber, and a storage chamber for measuring instruments, etc., which is connected to the outside of one side wall of the anechoic chamber body and shielded with a conductor. A door for carrying in and out of measuring equipment is formed on one side wall forming a boundary between the anechoic chamber and a storage chamber for measuring instruments, etc., and a slit is formed from the ceiling of the anechoic chamber to the ceiling of the storage chamber for measuring instruments, etc. At the same time, a transfer device equipped with a hoist for suspending measurement equipment, etc. along the slit is movably arranged on the back of the ceiling of both rooms, and the suspension is suspended from the hoist into the both rooms through the slit. A mechanism for transporting measuring equipment, etc. in an anechoic chamber, characterized in that the measuring equipment, etc. can be suspended and moved using a hanging tool. (2) The measuring device in the anechoic chamber according to claim (1), characterized in that the slit and the transfer device that moves along the slit are shielded with a conductive cover that covers the entirety of the slit and the transfer device that moves along the slit. etc. transport mechanism.