JP3346649B2 - 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 for accommodating a squid element.

[0002]

2. Description of the Related Art In recent years, in the medical field, weak brain magnetic waves generated from the brain have been detected 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.

Heretofore, as such a squid mount device, there has been known a device in which a dewar portion is supported by a vertical member hanging from a ceiling, and the dewar portion is rotatable in the front-rear direction.

[0005]

However, in the conventional squid gantry, the dewar can be rotated only in one direction in the front-rear direction, so that the tip of the dewar can be quickly and reliably moved to a predetermined position. There was a problem that it was difficult to move.

In general, in biomagnetism measurement, as shown in FIG. 12, for example, when a model of a head is a sphere B, a magnetic field in the radius r direction of the sphere B is centered on the center O of the sphere B. It is necessary to measure in a spherical shape, and in order to correctly measure the magnetic field in the radius r direction, spherical coordinates r, θ,
Although it is necessary to set φ accurately, in the conventional squid mount apparatus, the tip of the dewar part D is positioned at the spherical coordinates r, θ,
It was difficult to move quickly and reliably to the position of φ.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has as its object to provide a squid gantry capable of moving the tip of a dewar to a predetermined position quickly and reliably.

[0008]

According to a first aspect of the present invention, there is provided a squid gantry comprising a support plate having a through hole formed in the center between a pair of vertical members opposed to each other at a predetermined interval. Both side portions of the support plate located on the vertical member side are rotatably supported by the vertical member via an outer rotation mechanism, and the support plate has
A pair of receiving portions are protruded from the positions on both sides where the vertical member is not provided and toward the through hole, and the receiving portions are rotatably supported on the support plate via an inner rotation mechanism. A plate member for supporting the dewar portion is detachably mounted on the receiving portion.

According to a second aspect of the present invention, in the squid mount apparatus according to the first aspect, a brake mechanism for fixing the support plate at a predetermined rotation angle is disposed in the outer rotation mechanism.

According to a third aspect of the present invention, in the squid mount apparatus according to the first or second aspect, a brake mechanism for fixing the receiving portion at a predetermined rotation angle is disposed in the inner rotation mechanism. is there.

[0011]

In the squid gantry device of the first aspect, the support plate is rotatable, for example, in the front-rear direction by the outer rotation mechanism, and the receiving portion is rotatable, for example, in the left-right direction by the inner rotation mechanism. As a result, the dewar unit can rotate in the front-rear and left-right directions.

According to the second aspect of the present invention, the support plate is fixed at a predetermined rotation angle by the brake mechanism of the outer rotation mechanism. According to the third aspect of the present invention, the receiving portion is fixed at a predetermined rotation angle by the brake mechanism of the inner rotation mechanism.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an embodiment of a squid mount apparatus according to the present invention.
Indicates a pair of vertical members opposed to each other at a predetermined interval.

As shown in FIG. 2, the 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. I have.

A support plate 17 is disposed between the pair of vertical members 11. The support plate 17 is rotatably supported on both sides of the support plate 17 located on the vertical member 11 side by the vertical member 11 via an outer rotation mechanism 18.

That is, a bracket 19 is fixed to the support plate 17 in the vertical direction, and the bracket 19 is rotatable about a rotation shaft 21 inserted in the horizontal direction between the vertical member 11 and the bracket 19. Have been.

Further, a brake mechanism 22 for fixing the support plate 17 at a predetermined rotation angle is disposed on the outer rotation mechanism 18. That is, the vertical member 11
An air cylinder 23 is arranged at the lower end of the air cylinder 23, and a piston rod 25 of the air cylinder 23 is inserted through the vertical member 11 and the bracket 19 in a horizontal direction, and a lock plate 27 is fixed to the end thereof.

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

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

These half plate receiving portions 33 are shown in FIG.
As shown in (1), it is rotatably supported by the support plate 17 via the inner rotation mechanism 34. That is, the half plate receiving portion 33 is fixed to the rotating member 35 by the bolt 37.

The support plate 1 is provided outside the rotating member 35.
A bracket 39 projecting upward from 7 is arranged. A rotation shaft 41 is inserted in the bracket 39 and the rotation member 35 in the horizontal direction, and the rotation member 35 is rotatable about the rotation shaft 41.

A brake mechanism 42 for fixing the half plate receiving portion 33 at a predetermined rotation angle is disposed in the inner rotation mechanism 34. That is, the air cylinder 43 is disposed at the upper end of the bracket 39, the piston rod 45 of the air cylinder 43 is inserted horizontally through the bracket 39 and the rotating member 35, and the lock plate 47 is fixed to the end thereof. I have.

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

FIG. 1 shows a pair of half plate receiving portions 33.
As shown in FIG. 7, both sides of the pair of half plates 49 are placed. Both sides of the half plate 49 are fixed pins 51
As a result, 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 handle 55 is fixed outside 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 fixing of the annular member 59 to the dewar section main body 57 is performed 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 to a mounting member 63 fitted on the outer periphery of the annular member 59 by bolts 65, 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 accommodated in the annular groove 69 at a predetermined angle. These resin balls 71
Is prevented from falling out of the annular groove 69 by an annular spacer 73 having a hole formed at a predetermined angle.

These resin balls 71 are mounted on the upper surfaces of the edges of the semicircular portions 53 of the pair of half plates 49. Note that all the components of the above-described squid mount apparatus are all formed of a non-magnetic material such as aluminum or resin.

In the above-described squid gantry, the mounting of the dewar unit 29 to the squid gantry is performed 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.

The dewar unit 29 is inserted with a lifting device made of a non-magnetic material, and is mounted on the upper end of a mounting unit 79 formed above the lifting unit 77 of the lifting device 75. This is performed by moving the elevating unit 77 upward by a driving device such as an air cylinder (not shown) with the lower surface inside the resin ball 71 of the support member 61 placed thereon.

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

In this state, the dewar unit 29 is moved downward by lowering the elevating unit 77.
As shown in FIG. 5, a pair of half plates 49 is 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 The split plate 49 is placed on the upper surface of the edge of the semicircular hole 53.

Thereafter, both sides of the half plate 49 are fixed to the half plate receiving portion 33 by the fixing pins 51.
It is fixed detachably. On the other hand, when removing the dewar unit 29 from the squid mount device, the fixing pin 51 is removed and the half plate receiving portions 33 of the pair of half plates 49 are removed.
After the fixing to the dewar portion 29 is lifted, the dewar portion 29 is lifted upward, and in this state, the pair of half plates 49 is removed from both sides of the dewar portion 29, and the dewar portion 29 is moved downward to allow the support plate 17 to penetrate. This is performed by completely removing the dewar section 29 from the hole 31.

In the above-described squid stand device, when the lower end of the dewar portion 29 is pressed in the front-rear direction with the brake mechanism 22 of the outer rotating mechanism 18 released, as shown in FIG. The support plate 17 is rotated around the rotation shaft 21 of the
Is rotated in the front-rear direction.

On the other hand, the brake mechanism 4 of the inner rotation mechanism 34
When the lower end of the dewar unit 29 is pressed in the left and right direction as shown in FIG.
The half plate receiving portion 33 is rotated about the rotating shaft 41 of the center, and the dewar portion 29 is rotated left and right.

Thus, in the above-described squid mount apparatus, the support plate 17 is rotatable in the front-rear direction by the outer rotation mechanism 18, while the half plate receiving portion 33 is rotated by the inner rotation mechanism 34 in the left and right directions. In this case, the dewar unit 29 can be easily rotated in the front-rear and left-right directions. As a result, the operations of the vertical movement mechanism (not shown), the front-rear movement mechanism, the left-right movement mechanism, and the like are combined. The tip of the dewar unit 29 can be quickly and reliably moved to, for example, the positions of the spherical coordinates r, θ, and φ shown in FIG.

The brake mechanism 2 of the outer rotating mechanism 18
2, the support plate 17 can be securely fixed at a predetermined rotation angle. Further, by operating the brake mechanism 42 of the inner rotation mechanism 34, the half plate receiving portion 33 is set at a predetermined rotation angle. , The tip of the dewar unit 29 can be reliably fixed at the positions of the spherical coordinates r, θ, and φ.

Further, in the above-described squid mount device, the mounting of the dewar unit 29 to the squid mount device is
It becomes possible by inserting the semicircular holes 53 of the pair of half plates 49 below the support member 61 from both sides of the dewar unit 29, while the dewar unit 29 can be removed from the squid mount device on both sides of the dewar unit 29. By removing the pair of half plates 49 from the squid frame device, the dewar unit 29 can be quickly and reliably attached to and detached from the squid mount device.

In the above-described dewar portion 29, the resin ball 71 disposed along the lower surface of the support member 61
Since the dewar unit 29 is mounted on the upper surface of the edge of the semicircular hole 53 of the pair of half plates 49 of the squid gantry, the dewar unit 29 can be easily supported on the half plate 49 so as to be freely rotatable.

[0041]

As described above, in the squid gantry according to the first aspect, the support plate is formed by the outer rotating mechanism.
Since the receiving portion can be rotated in the left-right direction by the inner rotation mechanism, the dewar can be easily rotated in the front-rear and left-right directions. As a result, The tip of the dewar can be quickly and reliably moved to a predetermined position.

In the squid mount apparatus according to the second aspect, the support plate can be securely fixed at a predetermined rotation angle by operating the brake mechanism of the outer rotation mechanism. In the squid mount device according to the third aspect, there is an advantage that the receiving portion can be reliably fixed at a predetermined rotation angle by operating the brake mechanism of the inner rotation mechanism.

[Brief description of the drawings]

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

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

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

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

FIG. 5 is a cross-sectional view illustrating a state in which the dewar unit is positioned below a support plate.

FIG. 6 is a top view showing the state of FIG. 5;

FIG. 7 is a cross-sectional view showing a state where the dewar unit is positioned above a support plate.

FIG. 8 is a top view showing the state of FIG. 7;

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

FIG. 10 is an explanatory view showing a state where the dewar section is inclined in the front-rear direction.

FIG. 11 is an explanatory diagram showing a state where the dewar unit is inclined in the left-right direction.

FIG. 12 is an explanatory diagram showing a method of biomagnetism measurement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Vertical member 17 Support plate 18 Outer rotation mechanism 22 Brake mechanism 29 Dewar part 31 Through hole 33 Half plate receiving part 34 Inner rotation mechanism 42 Brake mechanism 49 Half plate

Continuation of the front page (72) Inventor Gen Tominaga 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Shinya Kuriki 4-11, 7-17 Minami-ku, Sapporo, Hokkaido (72) Inventor Mitsuo Hori 25, Ohama-cho, Negami-cho, Nomi-gun, Ishikawa Pref. (72) Inventor, Isao Kurata, 1979, Shimizu, Yamadamura, Onuma-gun, Toyama Prefecture, Japan (56) References JP-A-5-212008 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 5/05 G01R 33/02 G01R 33/035 H01L 39/04

Claims (3)

(57) [Claims] 1. A support plate having a through-hole formed in the center is disposed between a pair of vertical members opposed to each other at a predetermined interval, and both side portions of the support plate located on the vertical member side are disposed. while rotatably supported on the outside of times through said moving mechanism vertical members, in the supporting plate
A pair of receiving portions are protruded and arranged toward the through hole from positions on both sides where the vertical member is not disposed, and the receiving portions are rotatably supported on the support plate via an inner rotation mechanism, And a plate member for supporting the dewar portion is detachably mounted on the receiving portion. 2. The squid gantry according to claim 1, wherein a brake mechanism for fixing the support plate at a predetermined rotation angle is disposed on the outer rotation mechanism. 3. The squid gantry device according to claim 1, wherein a brake mechanism for fixing the receiving portion at a predetermined rotation angle is arranged on the inner rotation mechanism.