Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2002-04-16
2004-12-14
Shrivastav, Brij B (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S324000, C324S322000
Reexamination Certificate
active
06831462
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of Japanese Application No. 2001-118163 filed Apr. 17, 2001.
BACKGROUND OF THE INVENTION
The present invention relates to a floor cover, which covers a front face of a lower part of an open type MR (Magnetic Resonance) system and in which a cradle where an object is provided moves swiftly thereon, and an MR system.
Explanation is given with reference to
FIG. 6
which is a perspective view of an open type MR system.
An open type MR system includes, in general, a lower part
1
, an upper part
3
, and two supporters
5
and
7
for supporting the upper part
3
by way of a space A on the lower part
1
.
Inside the lower part
1
and the upper part
3
, there are provided a magnet for causing an even static magnetic field in the space A and a receiving coil for receiving an MR signal from an object P.
The object P is placed in a cradle
13
provided in a table
11
, and the object P is carried in and carried out of the space A of the MR system by the cradle
13
moving back and forth in the direction of an arrow I.
Here, the cradle
13
moves back and forth in the direction of the arrow I by sliding on the front face of the lower part
1
.
Further, in order for the object to step on and off the cradle
13
, a table
11
is capable of rising and falling in the direction of an arrow II.
Further, in order to make possible to carry the object P in the space A from an arbitrary direction to the MR system, the table
11
is capable of moving in the direction of an arrow III along the MR system.
The front face (floor) of the lower part
1
is a cover (a floor cover
21
is used hereinafter) which is capable of being attached and detached through the whole area of the floor in order to make it possible to check easily a magnet and a receiving coil of the inside. The cradle
13
moves swiftly on the floor cover
21
.
Further, in the front edge portion of the floor cover
21
, a touch sensor
31
to detect the collision of the cradle
13
and the like is provided.
In this touch sensor
31
, a sensor body
33
is provided as shown in
FIG. 7
as a sectional view taken along the cutting line A—A of
FIG. 6
, which includes a long bar type base
35
provided in an angle part of a front edge part of the floor cover
21
and a sensor cover
37
made of rubber covering the base
35
which is fixed to the floor cover
21
with a double-faced tape.
Since the floor cover
21
of the MR system structured in the aforementioned way has a wide area, it is not possible for one operator to attach and detach but two operators are required.
Here, as shown in
FIG. 8
, it is also possible to provide a floor cover
23
having the size in which it comes to be possible for one operator to attach and detach.
However, in such a case that this kind of floor cover
23
is provided, a channel G is made between the floor cover
23
and a peripheral floor, and thus an insanitary condition is caused since dust and the like go into this channel G.
Further, at the time that the cradle
13
passes above this channel G, another problem in which discomfort is caused.
SUMMARY OF THE INVENTION
Therefore the object the present invention is to provide the MR system and the floor cover capable of being attached and detached by one operator.
The invention according to the first aspect to solve the aforementioned problem is characterized in that a floor cover which is provided in an attaching and detaching way on a front face, on which a cradle moves swiftly, of a lower part of an open type MR system, includes a slide capable of moving on the lower part.
By providing the slide capable of moving on the lower part, it is possible to attach and detach the floor cover without help.
The invention according to the second aspect is the floor cover according to the first aspect, which is characterized in that the slide is fixed to a back face.
By fixing the slide to the back face, it is omitted to take a time for fixing and removing the slide, and thus the operability is improved.
The invention according to the third aspect is the floor cover according to the first or second aspect, which is characterized in that the slide is capable of being stored in the lower part.
Since the slide is capable of being stored in the lower part, it is possible to prevent the system from becoming large in size.
The invention according to the fourth aspect is the floor cover according to any one of the first to third aspects, which is characterized in that a table is capable of being attached to and detached from a front part of an MR system in which the table is provided.
By attaching to and detaching from a front part of the MR system in which the table having a space is provided, the operability is improved.
The invention according to the fifth aspect is the floor cover according to the fourth aspect, which is characterized in that the slide is provided in an end portion side of the MR system.
By providing the slide in the end portion side of the MR system, it is possible to attach and detach the floor cover in a stable condition at the time of attaching to and detaching from the front portion of the MR system.
The invention according to the sixth aspect is the floor cover of the MR system according to any one of the first to fourth aspects, which is characterized in that a plurality of the slides are provided.
By providing a plurality of the slides, a three-point supporting condition is attained in any event among a human being and plural slides, and thus it is possible to attach and detach in a stable condition.
The invention according to the seventh aspect is the floor cover according to any one of the first to sixth aspects, which is characterized in that the slide moves on a resin plate covering an-upper portion of an internal instrument of the upper part.
Since the slide moves on the resin plate covering the upper part of the internal instruments in the upper part, it is possible to move smoothly.
The invention according to the eighth aspect is the floor cover according to anyone of the first to seventh aspects; which is characterized in that the slide includes a base provided in the back face of the floor cover and a slider provided in a rotatable way to the base, engaged with a space formed in the lower part at a time of storing, and capable of moving on the resin plate by rotating at a time of using.
Since the structure includes only the base and the slider, the cost becomes low.
Further, the slider engages with the space formed in the lower part at the time of storing, it cannot be supposed that the size of the MR system becomes large.
As the slider, it is possible to use an element, which slides on the resin plate in the same way as the invention according to the ninth aspect, or an element, which rolls and moves on the resin plate, such as a roller and a ball in the same way as the invention according to the twelfth aspect.
The invention according to the tenth aspect is the floor cover according to the ninth aspect, which is characterized in that the slider is made of low friction resin.
Since the slider is made of low friction resin, sliding resistance comes to be small and thus it is possible to move smoothly.
The invention according to the claim
11
is the floor cover according to the ninth or tenth aspect, which is characterized in that an angle between a top end face of the slider and the resin plate and an angle between an endmost face of the slider and the resin plate are obtuse respectively.
Since an angle between a top end face of the slider and the resin plate and an angle between an endmost face of the slider and the resin plate are obtuse respectively, it is possible to move smoothly even if there are a few concaves and projections on the resin plate.
Here, as the slider provided in a rotatable way to the base, an element, which rotates on the surface perpendicular to the floor face, may be possible in the same way as the invention according to the thirteenth aspect or an element, which rotates on the surface parallel to the floor face, may be possible
Ikebe Yusuke
Kitagawa Seiichi
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