JP3098136B2 - Squid mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squid gantry for supporting a dewar unit accommodating a squid element, and more particularly, to a support mechanism for supporting a dewar unit to be inclined with respect to a vertical member. .

[0002]

2. Description of the Related Art In recent years, in the medical field, detection of weak brain magnetic waves generated from the brain has been promoted to elucidate diseases such as stroke and epilepsy. For detection, a patient is accommodated in a magnetically shielded room, and a weak electroencephalogram generated from the brain is detected by, for example, a superconducting quantum interference device (hereinafter, referred to as a SQUID) device using liquid helium. Has been done.

[0003] Conventionally, a squid gantry is used to support a measuring unit (hereinafter referred to as a dewar unit) accommodating a probe, a squid element, a detection coil and the like so as to be movable in a space in a magnetically shielded room. ing.

[0004] As such a squid mount device,
BACKGROUND ART A vertical member hanging from a ceiling supports a dewar portion.

[0005]

However, in such a conventional squid gantry, it is necessary to use a non-magnetic material such as aluminum or resin, which is relatively low in rigidity, as a constituent member. When trying to support the dewar so that it can be tilted at any angle, it is difficult to secure sufficient rigidity to support the dewar, and in the worst case, the dewar is supported by a vertical member. There was a risk that the support mechanism would be damaged and the dewar would fall from the vertical member.

The present invention has been made to solve such a conventional problem, and even when a support mechanism for supporting a dewar portion on a vertical member is broken, it is possible to reliably prevent the dewar portion from dropping. An object of the present invention is to provide a squid mount device.

[0007]

According to the present invention, there is provided a squid gantry for supporting a dewar unit for accommodating a squid element, wherein the squid gantry comprises a pair of vertical members arranged vertically at a predetermined interval. On the inside, a rotating member that rotates together with a support shaft that is supported by a vertical member is arranged, and a circular plate is fixed inside the rotating member, and a supporting plate that supports the dewar unit is mounted on the circular plate. Fixed, and further, a plurality of balls are arranged along the lower side of the circular plate, the balls are supported by a ball receiving plate fixed to the vertical member, and each of the constituent members is formed of a non-magnetic material. It becomes.

[0008]

In the squid mount apparatus of the present invention, when the rotating member is rotated, the support plate is rotated via the circular plate, and the Dewar part supported by the support plate is rotated by the vertical member. It is inclined at a predetermined angle with respect to it.

In the case where the rotating member is damaged, for example, the circular plate is supported by the ball receiving plate via the ball.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; Each component used in the squid mount device of this embodiment is formed of a non-magnetic material such as aluminum or resin.

FIG. 1 shows an embodiment of a squid gantry according to the present invention. In this embodiment, the squid gantry is housed in a magnetic shield room 13 formed by a magnetic shield panel 11. .

That is, the squid stand 1 for supporting the dewar unit 15 is provided in the magnetic shield room 13.
7 are arranged. The squid mount 17 has a base 25 which connects the vertical column 19 and the horizontal column 21 and is reinforced by a reinforcing member 23, and the lower end of the vertical column 19 is fixed to a concrete floor by an anchor bolt 27. 29
It is fixed to.

A pair of guide rails 31 are arranged on the upper horizontal column 21 at a predetermined interval.
The horizontal moving member 33 is disposed between the two. A rotating member 35 is rotatably arranged on the upper surface of the horizontal moving member 33, and a pair of vertical support members 37 are supported at predetermined intervals on the rotating member 35 via brackets 39 and 41. I have.

A vertical moving member 43 is supported on the vertical supporting member 37 so as to be able to move up and down in a vertical direction. The vertical moving member 43 has a dewar section supporting section 45 for supporting the dewar section 15. ing.

In this embodiment, the dewar 15 is supported by a dewar support frame 47, and a support member 49 of the dewar support frame 47 is supported on a support plate 51.

FIGS. 2 to 4 show details of the dewar support 45 for supporting the dewar 15. FIG.
A support plate 51 is arranged between the pair of vertical movement members 43.

On the support plate 51, a plate 5
3 is mounted, and a dewar support frame 47 is placed on a resin bearing 55 disposed on the plate 53.
Are rotatably mounted.

As shown in FIG. 3, a pinion 49a is formed on the outer periphery of the support member 49. On the other hand, a tip rotation air cylinder 57 is disposed on the support plate 51, and a pinion 4 of a support member 49 is attached to a tip of a piston rod 57 a of the tip rotation air cylinder 57.
A rack 59 meshing with 9a is fixed.

Therefore, by operating the tip rotating air cylinder 57, the support member 49 is rotated, and only the dewar unit 15 is rotated. In FIGS. 2 to 4, reference numeral 61 indicates a rotating member disposed inside the vertical moving member 43.

As shown in FIG. 3, the rotating member 61
The vertical movement member 43 is rotatable together with a support shaft 67 that is supported via brackets 63 and 65. A circular plate 71 is fixed to the inside of the rotating member 61 by a bolt 69, and the circular plate 71 and the rotating member 61 are fixed to a support shaft 67 by a bolt 73.

The circular plate 71 includes a reinforcing plate 75.
Are fixed by bolts, and the outside of the support plate 51 is fixed to the upper surface of the reinforcing plate 75 by bolts 77.

In this embodiment, as shown in FIG. 2, a receiving plate 79 made of, for example, MC nylon is disposed below the rotating member 61, and is formed on the upper surface of the receiving plate 79. A pinion 61a formed outside the rotating member 61 is in contact with an arc-shaped concave portion (not shown).

Inside the receiving plate 79, a ball receiving plate 81 is arranged.
A ball 83 made of resin is arranged in an arc-shaped concave portion 81a formed on the upper surface of the substrate.

The receiving plate 79 and the ball receiving plate 81 are fixed to the vertical moving member 43 by bolts 85. On the other hand, a tilting air cylinder 87 is disposed on the vertical moving member 43 as shown in FIG.
A rack 89 meshing with the pinion 61a of the rotating member 61 is fixed to the tip of 7a.

Therefore, the rotation member 61 is rotated by operating the tilting air cylinder 87, and the support plate 51 is rotated via the circular plate 71 and the reinforcing plate 75.
Is rotated, and the dewar part 15 supported by the support plate 51 is inclined by a predetermined angle with respect to the vertical moving member 43 by this rotation.

In this embodiment, as shown in FIG. 4, above and below the circular plate 71 and the rotating member 61,
An arc-shaped long hole 91 is formed.
Fixing bolt 9 for fixing the rotating member 61 at a predetermined position
3 is inserted, and the tip of the fixing bolt 93 is
3 screwed.

In the above-described squid mount apparatus, however, the rotation pivoting together with the support shaft 67 pivotally supported by the vertical moving member 43 is provided inside the pair of vertical moving members 43 vertically arranged at a predetermined interval. A moving member 61 is arranged, a circular plate 71 is fixed inside the rotating member 61, and a support plate 51 for supporting the dewar unit 15 is fixed to the circular plate 71.
A plurality of balls 83 are arranged along the lower side, and the balls 83 are supported by a ball receiving plate 81 fixed to the vertical moving member 43. For example, when the rotating member 61 is broken, Since the 71 is supported by the ball receiving plate 81 via the ball 83, even if the support mechanism for supporting the dewar unit 15 on the vertical moving member 43 is broken, the dewar unit 15 can be reliably prevented from dropping. .

In this embodiment, a receiving plate 79 is arranged below the rotating member 61, and the receiving plate 7
Since the pinion 61a on the outer periphery of the rotation member 61 is brought into contact with the rotation member 9, the rotation member 61 is prevented from easily rotating due to frictional force between the receiving plate 79 and the pinion 61a, and the rotation is prevented. The positional accuracy of the member 61 can be improved.

[0029]

As described above, in the squid gantry according to the present invention, the squid gantry rotates inside the pair of vertical members arranged vertically at a predetermined interval together with the support shaft supported by the vertical members. A rotating member is arranged, a circular plate is fixed inside the rotating member, and a support plate supporting the dewar portion is fixed to the circular plate, and further,
A plurality of balls were arranged along the lower side of the circular plate, and the balls were supported by a ball receiving plate fixed to a vertical member.For example, when the rotating member was damaged, the circular plate was Therefore, even if the support mechanism for supporting the dewar section on the vertical member is broken, there is an advantage that the fall of the dewar section can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a squid gantry device of the present invention.

FIG. 2 is a side view showing details of a dewar support portion of FIG. 1;

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

[Explanation of symbols]

 15 Dewar part 43 Vertical moving member 51 Support plate 61 Rotating member 67 Support shaft 71 Circular plate 81 Ball receiving plate 83 Ball

Continued on the front page (72) Inventor Kazuki Higashiyama 8-2-1-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Office (72) Inventor Yoshinori Uchikawa 2-31-31 Minami-Oizumi, Nerima-ku, Tokyo ( 72) Inventor Makoto Kotani 821-24 Minamiotani, Machida City (56) References JP-A-6-197879 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 5/05

Claims (1)

(57) [Claims] 1. A squid gantry for supporting a dewar unit in which a squid element is accommodated, wherein a pair of vertical members vertically arranged at predetermined intervals are provided inside a pair of vertical members.
A rotation member that rotates together with a support shaft that is supported by a vertical member is arranged, and a circular plate is fixed inside the rotation member, and a support plate that supports the dewar unit is fixed to the circular plate. Further, a plurality of balls are arranged along the lower side of the circular plate, the balls are supported by a ball receiving plate fixed to the vertical member, and each of the constituent members is formed of a non-magnetic material. Characterized squid mount device.