JP3328068B2 - 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 squid gantry for supporting a dewar and a squid gantry.
To a method of mounting a dewar unit to a vehicle .

[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.

On the other hand, in general, the dewar section is filled with liquid helium in order to make the inside of the dewar section superconductive, and since this liquid helium evaporates with the passage of time, it is periodically filled with liquid helium. There is a need to.

Further, since the dewar used depends on the measuring point of the human body, it is necessary to replace the dewar according to the measuring point. And, conventionally, for example, the filling work of liquid helium removes the dewar unit from the squid mount device in the magnetic shield room, transports the dewar unit out of the magnetic shield room, and after filling the liquid helium,
This is done by transporting the dewar into a magnetically shielded room and attaching the dewar to a squid mount.

[0006]

However, the dewar having several tens of channels has a very heavy weight of, for example, about 80 kg, and has a large diameter. There is a problem that it becomes very difficult to attach and detach to and from the gantry.

SUMMARY OF THE INVENTION The invention of claim 1 is provided to solve such a conventional problem, and provides a dewar support structure for a squid gantry in which the dewar can be easily attached to and detached from the squid gantry. The purpose is to:

Another object of the present invention is to provide a method for mounting a dewar unit on a squid gantry, which can safely and easily mount the dewar on the squid gantry.

[0009]

[0010]

Means for Solving the Problems] Dewar unit support structure of the SQUIDs gantry device according to claim 1 is suspended from the ceiling of water
A pair of vertical members opposed to each other at predetermined intervals in the horizontal direction, an outer holder formed between the pair of vertical members and having a spherical hole narrowing toward a lower end opening, and a spherical hole of the outer holder. An inner holder having a through hole formed at the center and slidably fitted on the inner holder; a pair of half rings inserted into support holes formed along an upper edge of the through hole of the inner holder; A support member inserted into the through hole of the holder and fixed to the outer periphery has a dewar portion supported by the pair of half rings.

According to a second aspect of the present invention, there is provided a method for mounting a dewar section on a squid gantry apparatus, wherein the squid gantry apparatus has a dewar section supporting structure for a squid gantry apparatus. In the dewar mounting method, after the dewar placed on the elevating member of the elevating device is positioned below the through hole of the inner holder, the elevating member is moved upward, and the dewar of the dewar is moved. A support member is positioned above the through-hole, and in this state, the pair of half rings are fixed to the support member of the dewar unit. Are fitted into the support holes of the inner holder, and the dewar portion is supported by the inner holder.

[0012]

[0013]

[0014]

According to the dewar support structure of the squid gantry device of the first aspect, the outer periphery of the inner holder is slidably fitted in the spherical hole of the outer holder supported between the pair of vertical members. The inner holder is inclined at an arbitrary angle with respect to the holder, whereby the dewar part inserted and supported in the through hole of the inner holder is supported at an arbitrary angle, and the tip of the dewar part is positioned at a predetermined position. .

[0015] In this supporting structure, after the dewar portion placed on the elevating member of the elevating device is positioned below the through hole of the inner holder, the elevating member is moved upward.
With the support member of the dewar part positioned above the through hole, in this state, a pair of half rings are fixed to the support member of the dewar part, and thereafter, the elevating member is moved downward, and the half ring is attached to the inner holder. The dewar unit is mounted on the squid gantry device by fitting the dewar unit into the support hole and supporting the dewar unit on the inner holder.

On the other hand, when the dewar unit is removed from the squid stand device, the elevating device is positioned below the dewar unit supported by the inner holder, the dewar unit is placed on the elevating member of the elevating device, and the elevating member is removed. The dewar part is moved upward by the upward movement, and in this state, a pair of half rings are removed from the support member of the dewar part, and thereafter, the elevating member is moved downward, and the dewar part is pulled out of the inner holder. This is done by:

According to the method of attaching the dewar unit to the squid stand apparatus according to the second aspect, the dewar unit can pass through the through hole of the inner holder when the pair of half rings are not fixed to the support member of the dewar unit. By moving the elevating member of the apparatus upward, the support member of the dewar unit is positioned above the through hole.

In this state, a pair of half rings are fixed to the support member of the dewar section, and thereafter, the lifting member is moved downward, and the half ring is fitted into the support hole of the inner holder. The dewar is supported by the inner holder.

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a dewar support structure of a squid gantry device according to the present invention. In the drawing, reference numeral 11 denotes a pair of vertical columns which are suspended from a ceiling 13 and are arranged opposite to each other at a predetermined interval. ing.

A vertical member 15 is disposed on the vertical column 11 so as to be movable up and down. These vertical members 1
Between 5, the outer holder 17 is supported. The outer holder 17 has a spherical hole 19 narrowing toward the lower end opening.
Are formed.

An inner holder 23 having a spherical surface 21 corresponding to the spherical hole 19 formed on the outer periphery is slidably fitted in the spherical hole 19 of the outer holder 17. In addition, as shown in FIG.
The outer bolt 17 is screwed into the outer holder 17.
Can be fixed at an arbitrary angle with respect to.

At the center of the inner holder 23, a through hole 27 is provided.
Are formed. A support hole 29 is formed along the upper edge of the through hole 27 of the inner holder 23.

A pair of half-rings 31 are inserted into the support holes 29. The dewar part 33 is inserted through the through hole 27 of the inner holder 23. A support member 35 fixed to the outer periphery of the dewar section 33 is supported by the pair of half rings 31.

In the drawing, reference numeral 37 denotes a decorative cover divided into two parts. In this embodiment, each member constituting the support structure is formed of a non-magnetic material such as aluminum or resin.

In the dewar support structure of the squid mount apparatus described above, the outer periphery of the inner holder 23 is slidably fitted into the spherical hole 19 of the outer holder 17 supported between the pair of vertical members 15. The inner holder 23 is inclined at an arbitrary angle with respect to the outer holder 17, whereby the dewar 33 inserted and supported in the through-hole 27 of the inner holder 23 is supported at an arbitrary angle. Is located at a predetermined position.

In this support structure, the mounting of the dewar unit 33 to the squid mount apparatus is performed as described below. That is, first, as shown in FIG. 3, the dewar unit 33 placed on the elevating device 39 is positioned below the through hole 27 of the inner holder 23.

A cylindrical member 43 is fixed on the elevating member 41 of the elevating device 39.
A support member 35 fixed to the dewar section 33 is placed on the upper end of the support member 35.

Thereafter, the lifting member 41 is moved upward,
As shown in FIG. 4, the support member 35 of the dewar unit 33 is located above the through hole 27. Then, in this state, the pair of half rings 31 are fixed to the support member 35 of the dewar unit 33.

This fixing is performed by fitting a pair of half rings 31 from both sides of the support member 35 and fixing the mounting bracket 45 to the upper surface of the half ring 31 with screws 47 as shown in FIG. It is performed by

Thereafter, the elevating member 41 is moved downward,
By fitting the half ring 31 into the support hole 29 of the inner holder 23 and supporting the dewar section 33 on the inner holder 23, the mounting of the dewar section 33 to the squid gantry is completed.

On the other hand, when removing the dewar unit 33 from the squid stand device, the elevating device 39 is positioned below the dewar unit 33 supported by the inner holder 23, and the dewar unit 33 is placed on the elevating member 41 of the elevating device 39. The dewar 33 is moved upward by moving the elevating member 41 upward, and in this state, the supporting member 3 of the dewar 33 is moved.
This is performed by removing the pair of half rings 31 from 5 and then moving the elevating member 41 downward to remove the dewar unit 33 from the inner holder 23.

FIGS. 5 to 7 show the lifting device 39 described above.
In these figures, reference numeral 51 denotes
Indicates a base made of a plate material. As shown in FIG. 7, vertical supports 53 are provided on the base 51 at predetermined intervals.
Are arranged facing each other.

In this embodiment, the base 51 has a rectangular shape, and vertical columns 53 are erected at four corners thereof. The upper and lower portions of the vertical support 53 are connected by a reinforcing frame 54 having a U-shaped cross section.

The vertical support 53 has a U-shaped cross section that opens outward, and a gap 55 is formed between the vertical support 53 and an adjacent vertical support 53. Between the gaps 55 formed between the vertical columns 53, the dewar 3 which is an object to be raised and lowered is provided.
3 is placed horizontally.

In this embodiment, the elevating member 41 has a U-shaped cross section that opens downward. Then, as shown in FIG. 6, on the upper surface of the elevating member 41, the dewar section 33 is provided.
Cylindrical member 43 for placing and supporting the support member 35 of FIG.
Has been fixed.

Both sides of the elevating member 41, that is, the gap 5
5, rodless cylinders 57 are vertically arranged. These rodless cylinders 57
It is fixed by a screw 61 to a mounting member 59 fixed to the vertical support 53.

As shown in FIG. 6, a moving base 63 which moves up and down along the rodless cylinder 57 by supplying and discharging a pressure fluid, for example, air to the rodless cylinder 57, is provided in the rodless cylinder 57. Are located.

The end of the lifting member 41 is connected to the moving base 63 via a connecting plate 65. As shown in FIG. 8, a pair of rotating shafts 67 are arranged below the elevating member 41 at predetermined intervals in the horizontal direction.

As shown in FIG. 9, these rotating shafts 67 are rotatably supported by receiving members 71 fixed to the lower surface of the elevating member 41 by bolts 69. Rotating shaft 67
Pinions 73 are fixed to both sides of the
As shown in FIG. 5, the adjacent pinions 73 are meshed with each other.

On the other hand, a rack 75 is vertically fixed to the inner side surface of the vertical support 53 by bolts 77. A pinion 73 is meshed with the rack 75.

In this embodiment, the lifting device 39
Are all made of non-magnetic materials such as aluminum and resin. Elevating device 39 described above
Then, when the pair of rodless cylinders 57 is operated with the dewar unit 33 placed on the elevating member 41, the moving base 63 of the pair of rodless cylinders 57 moves upward or downward along the rodless cylinder 57. Then, with the movement of the moving base 63, the elevating member 41 connected on both sides to the moving base 63 via the connecting plate 65 is moved.

At this time, a pair of pinions 73 fixed on both sides of the rotating shaft 67 supported below the elevating member 41 mesh with racks 75 vertically arranged on both sides of the elevating member 41. However, since the pair of pinions 73 are fixed to both sides of the same rotating shaft 67, the rotation speeds of the pair of pinions 73 become the same, and the flow of the pressure fluid into the pair of rodless cylinders 57. Even if the pressure or the outflow pressure is different, the pair of pinions 73 is always located at the same height with respect to the rack 75.

Therefore, the elevating member 41 is moved up and down while the positions on both sides of the elevating member 41 always have the same height,
The lifting member 41 does not tilt toward one rodless cylinder 57 or the other rodless cylinder 57.

In the lifting device 39, the rotating shaft 67
Are arranged at predetermined intervals in the horizontal direction, and pinions 73 fixed to both sides of the rotating shaft 67 are meshed with each other, and racks 75 are arranged on both sides of these pinions 73. Therefore, the pair of pinions 73 arranged on one side of the pair of rotating shafts 67 and the pair of pinions 73 arranged on the other side of the pair of rotating shafts 67 are always in the rack 75.
At the same height.

Therefore, the pair of rotating shafts 67 arranged at a predetermined interval in the horizontal direction are always located on the same horizontal plane, whereby the lifting member 41 located above the pair of rotating shafts 67 is located. However, there is no inclination to one rotating shaft 67 side or the other rotating shaft 67 side.

In the dewar support structure of the squid gantry described above, the support member 3 of the dewar 33
5 is positioned above the through hole 27 of the inner holder 23,
In this state, the pair of half rings 31 is fixed to the support member 35 of the dewar unit 33, and thereafter, the dewar unit 33 is moved downward to fit the half ring 31 into the support hole 29 of the inner holder 23. This makes it possible to mount the dewar unit 33 on the squid gantry device, while moving the dewar unit 33 upward, and in this state, removing the pair of half rings 31 from the support member 35 of the dewar unit 33. Later, by moving the dewar unit 33 downward,
Since the dewar unit 33 can be removed from the inner holder 23, the dewar unit 3 can be attached to the squid stand device.
3 can be easily attached and detached.

By adjusting the width and the like of the half ring 31, a plurality of types of dewar sections 33 can be easily mounted. In the above-described method of mounting the dewar unit on the squid mount device, the lifting member 4 of the lifting device 39 is used.
By moving 1 upward, the support member 35 of the dewar unit 33 is positioned above the through hole 27, and in this state,
A pair of half-rings 31 is attached to the support member 35 of the dewar unit 33.
Then, the elevating member 41 is moved downward, and the half ring 31 is fitted into the support hole 29 of the inner holder 23, so that the dewar portion 33 can be supported by the inner holder 23. Therefore, by using the elevating device 39, the dewar unit 33 can be safely and easily attached to the squid mount device.

Further, the dewar unit 3 is moved by the elevating device 39.
Since the support ring 3 is securely supported, the half ring 31 can be securely mounted on the support member 35 of the dewar section 33 with sufficient time.

Further, by attaching a cart or the like to the elevating device 39, the dewar unit 33 can be easily transported. Further, in the above-described lifting device 39, the pinion 7
3 and the rack 75, the raising and lowering member 41 is moved up and down while the positions on both sides of the raising and lowering member 41 always have the same height.
It does not incline toward the 7th or the other rodless cylinder 57 side, so that the dewar section 33 can be ascended and descended without inclining.

Further, in the above-described lifting device 39, the pair of rotating shafts 67 arranged at predetermined intervals in the horizontal direction by the pinion 73 and the rack 75 are always located on the same horizontal plane. The elevating member 41 positioned above the rotating shaft 67 is not inclined to the one rotating shaft 67 side or the other rotating shaft 67 side, so that the dewar unit 33 can be reliably moved up and down without being inclined. it can.

In the elevating device 39 described above, the dewar unit 33 having a weight of, for example, 80 kg or more can be reliably moved up and down over a length of, for example, 500 mm or more without tilting. Liquid helium does not sway, and can be prevented from adversely affecting the squid element and the like, and the dewar 33 can be reliably prevented from falling due to the inclination.

Further, by changing the diameter of the cylindrical member 43, a plurality of types of dewar sections 33 can be easily mounted. In the embodiment described above, the lifting device 39
Has been described for raising and lowering the dewar unit 33, but the present invention is not limited to such an embodiment.
The present invention can be widely applied to ascending and descending of an ascending and descending object which does not want to be inclined when ascending or descending.

[0058]

As described above, in the dewar support structure of the squid gantry according to the first aspect, the support member of the dewar is positioned above the through-hole of the inner holder. A pair of half rings are fixed to the member, after which the dewar is moved downward and the half ring is fitted into the support hole of the inner holder, so that the dewar can be mounted on the squid mounting device. On the other hand, the dewar portion is moved upward, and in this state, a pair of half rings are removed from the support member of the dewar portion, and thereafter, the dewar portion is removed from the inner holder by moving the dewar portion downward. Therefore, the dewar unit can be easily attached to and detached from the squid mount device.

In the method for mounting the dewar unit on the squid mount apparatus according to the second aspect, the supporting member of the dewar unit is positioned above the through hole by moving the elevating member of the elevating device upward. Fixing the pair of half rings to the support member of the part, and thereafter moving the elevating member downward and fitting the half ring into the support hole of the inner holder, thereby supporting the dewar part on the inner holder. Therefore, the dewar unit can be safely and easily attached to the squid mount device.

[0060]

[0061]

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view showing a main part of the support structure of FIG.

FIG. 3 is a cross-sectional view showing a state in which an elevating device is positioned below the squid gantry device of FIG. 1;

FIG. 4 is a cross-sectional view showing a state where a support member of a dewar unit is positioned above a through hole of an inner holder of the squid gantry device of FIG. 1;

5 is a longitudinal sectional view showing an example of the temperature descending device.

FIG. 6 is a longitudinal sectional view of FIG.

FIG. 7 is a cross-sectional view of the upper part of FIG.

FIG. 8 is a cross-sectional view of the lower part of FIG.

FIG. 9 is a cross-sectional view showing a structure for supporting a rotating shaft on a lifting member.

[Explanation of symbols]

 Reference Signs List 15 Vertical member 17 Outer holder 19 Spherical hole 23 Inner holder 27 Through hole 29 Support hole 31 Half ring 33 Dewar section 35 Support member 39 Lifting device 41 Lifting member 51 Base 53 Vertical support 57 Rodless cylinder 63 Moving base 65 Connection plate 67 Rotating shaft 73 Pinion 75 Rack

Continuation of the front page (72) Inventor, Isao Kurata, 1979, Shimizu, Yamadamura, Tokugi-gun, Toyama Prefecture (56) References JP-A-4-164271 (JP, A) JP-A-7-283446 (JP, A) 297456 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01R 33/035 A61B 5/05 H01L 39/04

Claims (2)

(57) [Claims] 1. A pair of vertical members which are suspended from a ceiling and are disposed facing each other at a predetermined interval in a horizontal direction, and a spherical hole which is supported between the pair of vertical members and narrows toward a lower end opening is formed. An outer holder, an inner holder slidably fitted into the spherical hole of the outer holder and having a through hole formed at the center, and a support hole formed along an upper edge of the through hole of the inner holder. A pair of half rings, and a dewar portion in which a support member inserted into the through hole of the inner holder and fixed to the outer periphery is supported by the pair of half rings. Dewar support structure. 2. A method for mounting a dewar unit on a squid gantry device for mounting the dewar unit on a squid gantry device having a dewar unit support structure for a squid gantry device according to claim 1, wherein After the dewar to be placed is positioned below the through-hole of the inner holder, the elevating member is moved upward, and the support member of the dewar is positioned above the through-hole. In, the pair of half rings are fixed to the support member of the dewar section,
Thereafter, the elevating member is moved downward, the half ring is fitted into the support hole of the inner holder, and the dewar portion is supported by the inner holder. Mounting method.