JP3437981B2 - Dewar support structure for squid mount - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewar part support structure for a squid mount device for supporting a dewar part in a squid mount device, and a dewar part and a dewar part support frame used in this structure.

[0002]

2. Description of the Related Art Recently, in the medical field, it has been attempted to detect weak brain magnetic waves generated from the brain to clarify diseases such as stroke and epilepsy. In order to detect, a patient is housed in a magnetically shielded room, and for example, a superconducting quantum interference device (hereinafter referred to as a SQUID device) sensor using liquid helium is used to detect weak brain magnetic waves generated from the brain. Is being done.

Conventionally, a squid mount device has been used to support a measuring unit (hereinafter referred to as a dewar unit) in which a probe, a squid element, a detection coil and the like are housed so as to be movable in a space within a magnetic shield room. ing.

On the other hand, in general, the dewar section is filled with liquid helium in order to bring the inside of the dewar section into a superconducting state, and since this liquid helium evaporates over time, the liquid helium is regularly filled. There is a need to.

Conventionally, in such a liquid helium filling operation, the dewar portion is removed from the squid mount device in the magnetic shield room, the dewar portion is transported to the outside of the magnetic shield room, the liquid helium is filled, and then the dewar portion is filled. It is carried in a magnetically shielded room, and the dewar section is attached to the squid mount device.

When performing the filling work in the magnetically shielded room, there is a possibility that oxygen deficiency may occur due to leakage of liquid helium. Further, it is necessary to replace the dewar section for the purpose of measurement or diagnosis, and at that time, it is necessary to attach or detach the dewar section.

[0007]

However, in the conventional squid mount device, since the heavy dewar part is directly fixed to the pair of vertical members of the squid mount device, the dewar part is attached to and detached from the squid mount device. However, there is a problem that it is not easy and requires a lot of time to attach and detach.

Since the dewar section is filled with liquid helium, tilting the dewar section causes the liquid surface of the liquid helium to sway or tilt, which adversely affects the squid element and the like arranged in the dewar section. There is a fear of giving.

The present invention has been made to solve such a conventional problem, and a dewar part support structure for a squid mount device capable of quickly and reliably attaching and detaching the dewar part to and from the squid mount device. It is an object to provide a dewar part and a dewar part support frame used in a structure.

[0010]

A dewar section support structure for a squid mount apparatus according to the present invention has a pair of vertical members opposed to each other at a predetermined interval, and a through hole supported between the pair of vertical members. A support plate to be formed, a pair of half plate receiving portions fixed to the support plate and projecting toward the through hole, and a semicircular arc that is detachably mounted on the pair of half plate receiving portions. A pair of half-divided plates in which holes are formed, and a support member disposed in the middle of the dewar portion main body, and resin balls arranged along the lower surface of the support member are the semi-circular arc portions of the pair of half-divided plates. And a dewar portion placed on the upper surface of the edge portion of the.

The dewar portion of the present invention comprises an annular support member fixed to the middle portion of the dewar body and resin balls arranged along the lower surface of the support member. In the dewar part support frame of the present invention, a resin ball is arranged along the lower surface of an annular support member arranged in the middle part of the dewar part, and a mounting is provided for mounting the lower end of the dewar part on the support member. The members are connected by a connecting member.

[0012]

In the dewar part support structure of the squid mount device of the present invention, the dewar part is mounted on the squid mount device by inserting the dewar part from below into the through hole formed in the support plate and fixing it to the dewar part. When the supporting member is located above the supporting plate, the semi-circular arc holes of the pair of half-divided plates are inserted below the supporting member from both sides of the dewar portion, and in this state, the dewar portion is moved downward, The half plate is placed on the half plate receiving portion fixed to the support plate, and the resin balls arranged on the lower surface of the support member are placed on the upper surfaces of the edges of the half arc holes of the pair of half plates. It is done by placing.

On the other hand, to remove the dewar part from the squid mount device, after releasing the fixing of the pair of half plates to the half plate receiving part, the dewar part is lifted upward and in this state from both sides of the dewar part. This is done by removing the pair of half plates, moving the dewar portion downward, and completely removing the dewar portion from the through hole of the support plate.

In the dewar section of the present invention, the resin balls arranged along the lower surface of the support member are placed on the upper surfaces of the edges of the semi-circular arc holes of the pair of half plates of the squid mount device, whereby the dewar section is formed. Is rotatably supported on the half plate.

In the dewar portion support frame of the present invention, the outer periphery of the lower end of the dewar portion is placed on the placing member, whereby the load of the dewar portion is supported. Then, the resin balls arranged along the lower surface of the partition member are placed on the upper surfaces of the edge portions of the semi-circular arc holes of the pair of half-divided plates of the squid mount device, whereby the dewar portion is rotated on the half-divided plate. Freely supported.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 and FIG. 2 show an embodiment of the dewar part supporting structure of the squid mount device of the present invention. In the drawings, reference numeral 11 denotes a pair of vertical members facing each other at a predetermined interval. .

As shown in FIG. 2, these vertical members 11 are vertically movably guided by vertical columns 13 arranged at predetermined intervals, and the upper ends of the vertical columns 13 are connected to the horizontal portion 15. There is.

A support plate 17 is arranged between the pair of vertical members 11. Brackets 19 are fixed to both sides of the support plate 17 in the vertical direction, and the bracket 19 is rotatable about a rotary shaft 21 that is inserted through the vertical member 11 and the bracket 19 in the horizontal direction. .

An air cylinder 23 is arranged at the lower end of the vertical member 11, a piston rod 25 of the air cylinder 23 is horizontally inserted into the vertical member 11 and the bracket 19, and a lock plate 27 is fixed to the tip thereof. There is.

Therefore, by operating the air cylinder 23 and pulling the lock plate 27, the bracket 19 is pressed against the vertical member 11, and the bracket 19 is pushed by the vertical member 1.
Locked to 1.

A through hole 31 having an inner diameter sufficiently larger than the outer diameter of the dewar portion 29 is formed in the support plate 17. Then, a pair of half plate receiving portions 33 are projected toward the through holes 31 at positions on both sides of the support plate 17 where the vertical members 11 are not arranged.

The pair of half plate receiving portions 33 are
As shown in FIG. 3, the rotary member 35 is fixed by bolts 37. On the outer side of the rotating member 35, a bracket 39 is disposed so as to project upward from the support plate 17.

A rotating shaft 41 is horizontally inserted into the bracket 39 and the rotating member 35, and the rotating member 35 is inserted into the rotating shaft 4.
It is rotatable about 1. Bracket 39
An air cylinder 43 is arranged at the upper end of the air cylinder 43, a piston rod 45 of the air cylinder 43 is horizontally inserted through the bracket 39 and the rotating member 35, and a lock plate 47 is fixed to the tip thereof.

Therefore, by operating the air cylinder 43 and pulling the lock plate 47, the rotating member 35 is pressed against the bracket 39, and the rotating member 35 is moved.
Locked at 9.

The pair of half plate receiving portions 33 have a structure shown in FIG.
As shown in FIG. 5, both sides of the pair of half plates 49 are placed. Fixing pins 51 are provided on both sides of the half plate 49.
Thus, it is detachably fixed to the half plate receiving portion 33.

As shown in FIG. 4, a half arc hole 53 is formed in the half plate 49, and a grip 55 is fixed to the outside of the half arc hole 53. In this embodiment, as shown in FIG. 3, an annular member 59 is fixed in the middle of the dewar section main body 57.

The annular member 59 is fixed to the dewar body 57 by, for example, driving a pin or welding. An annular support member 61 is fixed to the lower surface of the annular member 59.

The support member 61 is fixed by a bolt 65 to a mounting member 63 fitted on the outer periphery of the annular member 59, and the mounting member 63 is supported on the upper surface of the annular member 59 via a bracket 67. .

An annular groove 69 is formed on the lower surface of the support member 61, and a resin ball 71 is housed in the annular groove 69 at a predetermined angle. These resin balls 71
Is prevented from coming off from the annular groove 69 by an annular spacer 73 having a hole formed at a predetermined angle.

The resin balls 71 are placed on the upper surfaces of the edges of the semi-circular arc portions 53 of the pair of half-split plates 49. All the components of the squid mount device described above are made of a non-magnetic material such as aluminum or resin.

In the above-mentioned dewar part support structure for the squid mount device, the dewar part 29 for the squid mount device is used.
Is mounted as described below. First, as shown in FIGS. 5 and 6, with the half plate 49 removed from the support plate 17, the dewar portion 29 is inserted from below into the through hole 31 formed in the support plate 17.

An elevating device made of a non-magnetic material is used for inserting the dewar part 29, and the dewar part 29 is attached to the upper end of the placing part 79 formed on the elevating part 77 of the elevating device 75. This is performed by moving the elevating part 77 upward by a drive device such as an air cylinder (not shown) while the lower surface of the support member 61 inside the resin ball 71 is placed.

Thereafter, as shown in FIG. 7, the dewar section 2
When the support member 61 fixed to 9 is positioned above the support plate 17, as shown in FIGS. 7 and 8, the pair of half plates 49 are placed under the support member 61 from both sides of the dewar portion 29. The arc hole 53 is inserted.

In this state, the dewar part 29 is moved downward by lowering the elevating part 77, as shown in FIGS.
As shown in FIG. 3, the pair of half plates 49 are placed on the half plate receiving portion 33 fixed to the support plate 17, and at the same time, the resin balls 71 arranged on the lower surface of the support member 61 are formed into the pair of half plates. The split plate 49 is placed on the upper surface of the edge of the semicircular arc hole 53.

Then, after that, both sides of the half plate 49 are fixed to the half plate receiving portion 33 by the fixing pins 51.
It is detachably fixed. On the other hand, to remove the dewar part 29 from the squid mount device, the fixing pin 51 is removed and the half plate receiving part 33 of the pair of half plates 49 is removed.
After releasing the fixing to the dewar part 29, the dewar part 29 is lifted upward, and in this state, the pair of half plates 49 are removed from both sides of the dewar part 29, and the dewar part 29 is moved downward to penetrate the support plate 17. This is done by completely removing the dewar portion 29 from the hole 31.

In the above-mentioned dewar part support structure for the squid mount device, the dewar part 29 for the squid mount device is
Can be installed by inserting the semi-circular arc holes 53 of the pair of half-divided plates 49 below the support member 61 from both sides of the dewar part 29, while the dewar part 29 can be removed from the squid mount device. This is possible by removing the pair of half plates 49 from both sides of the portion 29, so that the dewar portion 29 can be quickly and reliably attached to and detached from the squid mount device.

Further, in the above-mentioned dewar section 29, the resin balls 71 arranged along the lower surface of the support member 61 are
Since it is placed on the upper surface of the edge of the semi-circular arc hole 53 of the pair of half-split plates 49 of the squid mount device, it is possible to easily rotatably support the dewar portion 29 on the half-split plate 49.

10 and 11 show one embodiment of the dewar part support frame of the present invention. In the figures, reference numeral 81 denotes an annular support member 81 arranged in the middle part of the dewar part 29. There is.

Below the supporting member 81, an annular mounting member 83 for mounting the lower end of the dewar portion 29 is arranged at a predetermined interval so as to face each other. The support member 81 and the mounting member 83 are connected by a plurality of connecting members 85.

Mounting portions 87 are formed at both ends of the connecting member 85, and these mounting portions 87 are inserted into the supporting member 81 and the mounting member 83. A screw portion is formed at the tip of the mounting portion 87, and a nut member 89 is screwed into this screw portion.

An annular collar 91 is fixed to the upper surface of the support member 81 with bolts 93, as shown in FIG. An annular groove 95 is formed on the lower surface of the support member 81, and the resin balls 97 are housed in the annular groove 95 at a predetermined angle.

These resin balls 97 are prevented from coming off from the annular groove 95 by an annular spacer 99 having a hole formed at a predetermined angle. All the above-mentioned dewar part support frames are made of a non-magnetic material such as aluminum or resin.

The above-mentioned dewar supporting frame is shown in FIG.
As shown in FIG. 3, the dewar portion 101 is used by being fitted onto the lower portion thereof. In this state, the outer periphery of the lower end of the dewar portion 29 is placed on the placing member 83, and thus the load of the dewar portion 29 is supported.

Then, in the same manner as in the above-described embodiment, the dewar portion 101 is inserted from below into the through hole 31 formed in the support plate 17 with the half plate 49 removed from the support plate 17. After that, when the support member 81 is located above the support plate 17, the semi-circular arc holes 53 of the pair of half-divided plates 49 are inserted below the support member 81 from both sides of the dewar portion 29, and finally, As shown in FIG. 14, the resin balls 91 arranged on the lower surface of the support member 81 are formed by a pair of half plates 49.
It is placed on the upper surface of the edge of the semicircular arc hole 53.

Incidentally, when inserting the dewar section 101,
As in the above-described embodiment, a lifting device made of a non-magnetic material is used. In the dewar part support frame described above,
It is possible to easily rotatably support the dewar section 101 on the half-divided plate 49, and since the load of the dewar section 101 is supported by the dewar section support frame, the dewar section 101 can be easily moved. It can be carried out.

[0046]

As described above, in the dewar part support structure of the squid mount device of the present invention, the dewar part is attached to the squid mount device by a pair of half plates below the supporting member from both sides of the dewar part. It becomes possible by inserting the semi-circular hole of the, while the dewar part can be removed from the squid mount device by removing the pair of half plates from both sides of the dewar part.
The dewar part can be attached to and detached from the squid mount device quickly and reliably.

In the dewar part of the present invention, the resin balls arranged along the lower surface of the support member are placed on the upper surfaces of the edges of the semi-circular arc holes of the pair of half plates of the squid mount device. It becomes possible to easily rotatably support the halves on the half plate.

In the dewar part support frame of the present invention, it is possible to easily rotatably support the dewar part on the half-divided plate, and the load of the dewar part is supported by the dewar part support frame. The advantage is that the dewar section can be easily moved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a dewar part support structure of a squid mount device of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a sectional view taken along the line III-III in FIG.

4 is a top view showing the half plate of FIG. 1. FIG.

FIG. 5 is a cross-sectional view showing a state in which a dewar portion is located below a support plate.

FIG. 6 is a top view showing the state of FIG.

FIG. 7 is a cross-sectional view showing a state in which the dewar portion is located above the support plate.

FIG. 8 is a top view showing the state of FIG.

FIG. 9 is a top view showing a state in which the dewar section is supported on a support plate.

FIG. 10 is a cross-sectional view showing an embodiment of the dewar section support frame of the present invention.

11 is a top view of FIG.

12 is a cross-sectional view showing details of the support member of FIG.

FIG. 13 is a cross-sectional view showing a state in which the dewar portion on which the dewar portion support frame is arranged is located below the support plate.

FIG. 14 is a cross-sectional view showing a state in which the dewar section is supported on a support plate.

[Explanation of symbols]

11 Vertical member 17 Support plate 29 Dewar Department 31 through hole 33 Half plate receiving part 49 half plate 53 Half-arc hole 61, 81 support member 71,97 resin balls 83 Placement member 85 Connection member

Front page continuation (72) Inventor Kazuyuki Higashiyama 8-21-1, Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Main Store (72) Inventor Shinya Kuriki 4-11, 7-Sumikawa, Minami-ku, Sapporo-shi, Hokkaido 17 (72) Inventor Mitsuo Hori No. 25 Ohama-cho, Negami-cho, Nomi-gun, Ishikawa Prefecture Fuji Seiko Honsha Co., Ltd. (72) Inventor Hironobu Yamamura No. 25 Ohama-cho, Negami-cho, Nomi-gun Ishikawa Prefecture Fuji Seiko Co., Ltd. In-house (72) Inventor Yukio Kurata Shimizu, Yamada-mura, Nyogun-gun, Toyama 1979 (56) Reference JP-A-63-263707 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01L 39 / 04 ZAA A61B 5/05 H01F 7/22 F25B 9/00

Claims (3)

(57) [Claims] 1. A pair of vertical members, which are opposed to each other at a predetermined interval, a support plate which is supported between the pair of vertical members and has a through hole, and a through hole which is fixed to the support plate. A pair of half plate receiving portions projecting toward each other; a pair of half plate plates that are detachably mounted on the pair of half plate receiving portions and have semicircular arc holes formed inside; A support member is disposed on the support member, and the resin ball disposed along a lower surface of the support member has a dewar portion mounted on an upper surface of an edge portion of the semi-circular arc portion of the pair of half plates. Dewar part support structure of the characteristic squid mount device. 2. A dewar part, characterized in that an annular support member is fixed to an intermediate part of the dewar part main body, and resin balls are arranged along the lower surface of the support member. 3. A resin ball is arranged along the lower surface of an annular support member arranged in the middle of the dewar section, and a mounting member for mounting the lower end of the dewar section is connected to the support member. A dewar part support frame characterized by being connected by members.