U.S. patent application number 09/927499 was filed with the patent office on 2002-03-07 for magnetic secured container closure with release by movement of magnetic member.
Invention is credited to Hyobu, Yukihiro.
Application Number | 20020027138 09/927499 |
Document ID | / |
Family ID | 22866461 |
Filed Date | 2002-03-07 |
United States Patent
Application |
20020027138 |
Kind Code |
A1 |
Hyobu, Yukihiro |
March 7, 2002 |
Magnetic secured container closure with release by movement of
magnetic member
Abstract
A container for a plurality of thin plates has a driving unit
for moving one of a pair of magnetic members, at least one of which
is a magnet, embedded in a container body and contained in a
chamber in a lid, respectively, to selectively produce attractive
and non-attractive magnetic conditions between the first and second
magnetic members. In one embodiment, the driving unit includes a
rotatable plate, and an arm having one end attached to the
rotatable plate and the second end attached to the movable magnetic
member to move the movable magnetic member in response to rotation
of the rotatable plate. In a second embodiment a parallel movement
link has a long groove for engaging a pin provided on the rotatable
plate; a magnetic member supporting link has a first end attached
to one end of the parallel movement link and has its second end
attached to the movable magnetic member. In a third embodiment the
rotatable plate has a first bevel gear meshing with a second bevel
gear on a shaft supporting the movable magnetic member.
Inventors: |
Hyobu, Yukihiro; (Tokyo,
JP) |
Correspondence
Address: |
LORUSSO & LOUD
3137 Mount Vernon Avenue
Alexandria
VA
22305
US
|
Family ID: |
22866461 |
Appl. No.: |
09/927499 |
Filed: |
August 13, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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09927499 |
Aug 13, 2001 |
|
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09230760 |
Feb 1, 1999 |
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Current U.S.
Class: |
220/230 ;
220/315; G9B/33.012 |
Current CPC
Class: |
G11B 33/0433 20130101;
H01L 21/67373 20130101; H01L 21/67376 20130101 |
Class at
Publication: |
220/230 ;
220/315 |
International
Class: |
B65D 051/00 |
Claims
1. A container for a plurality of thin plates comprising: a
container body having an interior for receiving and supporting the
plurality of thin plates; a lid for being detachably mounted on the
container body for sealing the interior of the container body; a
first magnetic member provided in the container body; a second
magnetic member provided in the lid; one of said first and second
magnetic members being a magnet; and driving means for moving a
movable magnetic member of said first and second magnetic members
to selectively produce first and second magnetic conditions between
said first and second members, said first magnetic condition being
to generate a magnetic attractive force between the first and
second magnetic members sufficient to secure the lid to the
container body, and said second magnetic condition being to release
said attractive magnetic force between the first and second
magnetic members sufficient to allow the lid to be freely removed
from the container body.
2. A container for a plurality of thin plates according to claim 1
wherein said first magnetic member is embedded in said container
body, said second magnetic member is the movable magnetic member,
and said lid has a substantially enclosed chamber containing the
second magnetic member.
3. A container for a plurality of thin plates according to claim 1
wherein the driving means comprises: a rotatable plate provided
with engagement means; a parallel movement link which has a long
groove for engaging with the engagement means provided on the
rotatable plate and which is adapted to have its ends move in
parallel in response to rotation of the rotatable plate; a magnetic
member supporting link having a first end attached to one end of
the parallel movement link and having its second end attached to
the movable magnetic member to move the movable magnetic member in
response to rotation of the rotatable plate between first and
second positions producing the first and second magnetic
conditions.
4. A container for a plurality of thin plates according to claim 2
wherein the driving means is contained in the chamber in the lid
and comprises: a rotatable plate provided with engagement means; a
parallel movement link which has a long groove for engaging with
the engagement means provided on the rotatable plate and which is
adapted to have its ends move in parallel in response to rotation
of the rotatable plate; a magnetic member supporting link having a
first end attached to one end of the parallel movement link and
having its second end attached to the movable magnetic member to
move the movable magnetic member in response to rotation of the
rotatable plate between first and second positions producing the
first and second magnetic conditions.
5. A container for a plurality of thin plates according to claim 1
wherein the driving means comprises: a rotatable plate having a
first bevel gear provided on one surface thereof; and a rotatable
shaft having one end provided with a second bevel gear meshing with
the first bevel gear and having its other end supporting the
movable magnetic member so that the movable magnetic member is
moved between first and second positions producing the first and
second magnetic conditions by rotation of the shaft in response to
rotation of the rotatable plate.
6. A container for a plurality of thin plates according to claim 2
wherein the driving means is contained within the chamber in the
lid and comprises: a rotatable plate having a first bevel gear
provided on one surface thereof; and a rotatable shaft having one
end provided with a second bevel gear meshing with the first bevel
gear and having its other end supporting the movable magnetic
member so that the movable magnetic member is moved between first
and second positions producing the first and second magnetic
conditions by rotation of the shaft in response to rotation of the
rotatable plate.
7. A container for a plurality of thin plates comprising: a
container body having an interior for receiving and supporting the
plurality of thin plates; a lid for being detachably mounted on the
container body for sealing the interior of the container body; said
lid having a substantially enclosed chamber formed therein; a first
magnetic member embedded in the container body; a second magnetic
member contained in the chamber in the lid; and driving means
provided in said lid for operating one of said first and second
magnetic members to selectively produce first and second magnetic
conditions between said first and second members, said first
magnetic condition being to generate a magnetic attractive force
between the first and second magnetic members sufficient to secure
the lid to the container body, and said second magnetic condition
being to release attractive magnetic force between the first and
second magnetic members sufficient to allow the lid to be freely
removed from the container body.
8. A container for a plurality of thin plates according to claim 7
wherein said one magnetic member includes a coil, and said driving
means selectively applies an electric current to said coil to
produce the first and second magnetic conditions.
9. A container for a plurality of thin plates according to claim 8
wherein said driving means includes a built-in power supply for
providing the electric current to the coil.
10. A container for a plurality of thin plates according to claim 8
wherein said driving means is contained in the chamber in the lid
and said one magnetic member is said second magnetic member
contained in the chamber in the lid.
11. A container for a plurality of thin plates according to claim 9
wherein said driving means is contained in the chamber in the lid
and said one magnetic member is said second magnetic member
contained in the chamber in the lid.
12. A container for a plurality of thin plates comprising: a
container body having an interior with an open end for receiving
and supporting the plurality of thin plates; and a lid for being
detachably mounted on the container body for sealing the interior
of the container body; said lid including a lid body for being
received in the open end of the container body, a lid plate
covering a side of the lid body and extending outward from the body
to engage the container body around the open end of the container
body; and a seal between the lid plate and lid body; said seal
having a tongue portion extending outwardly from said lid body
around the lid body for engaging the container body to seal the
interior of the container body.
13. A container of a plurality of thin plates according to claim 12
wherein the tongue portion of the seal engages between the outer
surface of the lid body and the container body.
14. A container for a plurality of thin plates according to claim
12 wherein the tongue portion of the seal engages between the lid
plate and the container body.
15. A container for a plurality of thin plates according to claim
12 wherein said lid has an enclosed chamber formed by the lid body
and the lid plate; and wherein the container further comprises: a
first magnetic member embedded in the container body; a second
magnetic member contained in the chamber in the lid; and driving
means for operating one of said first and second magnetic members
to selectively produce first and second magnetic conditions between
said first and second members, said first magnetic condition being
to generate a magnetic attractive force between the first and
second magnetic members sufficient to secure the lid to the
container body, and said second magnetic condition being to release
attractive magnetic force between the first and second magnetic
members sufficient to allow the lid to be freely removed from the
container body.
Description
TECHNICAL FIELD
[0001] The present invention relates to a lid-mounted thin-plate
housing container for housing and supporting a plurality of thin
plates, such as silicon wafers used for producing semiconductors,
hard memory disks (magnetic disks) substrates of compact disks (CD)
or the like, glass substrates of LCD and so on at one time for
transfer, storage and the like purposes.
BACKGROUND ART
[0002] Generally speaking, when thin plates, such as silicon wafers
or the like, are handled, they are housed in a thin-plate housing
container (for example, a wafer carrier or the like) In such a
thin-plate housing container, a plurality of thin plates are
supported in such a manner as to be disposed in parallel with one
another and spaced at predetermined intervals, and they are handled
at the same time.
[0003] Among such thin-plate containers, there is a type in which
an easily detachable lid is mounted. The lid is provided to prevent
an event that dusts or the like enter the container from outside
and adhere on the surfaces of the thin plates housed in the
container. For this purpose, the lid is adapted to be secured to
the thin-plate housing container so as to tightly seal the interior
of the container, body. Securing means for securing the lid is
usually constituted by an engagement claw and an engagement hole
which engage with each other so as to secure the lid to the
container body.
[0004] However, when the securing means is constituted by the
engagement claw and the engagement hole, the following problem
arises. Specifically, when the engagement claw fits into the
engagement hole, friction is caused therebetween. The friction thus
caused generates dusts or the like which adhere on the surfaces of
the thin plates.
[0005] The present invention is accomplished in view of the
above-mentioned problem. An object of the present invention is to
provide a lid-mounted thin-plate housing container in which a lid
can be steadfastly mounted while preventing generation of dusts or
the like.
DISCLOSURE OF INVENTION
[0006] According to the present invention, there is provided a
lid-mounted thin-plate housing container having a container body
for housing and supporting a plurality of thin plates, and a lid
detachably mounted to the container body for sealing the interior
of the container body, the container comprising a magnetic force
operating unit for operating magnetic force generated between the
container body and the lid, wherein the lid having been mounted on
the container body is secured to the container body by means of the
magnetic force.
[0007] Owing to this configuration, when the magnetic force
operating unit generates attractive magnetic force which causes the
lid and the container body to attract each other, the lid is
secured to the container body. In contrast, when the magnetic force
operating unit eliminates the attractive magnetic force, or when
the magnetic force operating unit generates repulsive magnetic
force, the lid is released from the container body. Thereby, the
lid can be easily removed.
[0008] Also, according to the present invention, the
above-mentioned magnetic force operating unit includes: magnets, or
a magnet and a magnetic member, which are provided at positions
corresponding to each other, one of the positions lying in the
container body, and the other one of the positions lying in the
lid; and driving means for moving one of the magnets, or one of the
magnet and the magnetic member, whereby magnetic force is
controlled by moving one of the magnets, or one of the magnet and
the magnetic member, by means of the driving means so that the lid
is secured to or released from the container body.
[0009] Owing this configuration, when one of the magnets, or one of
the magnet or the magnetic member, is moved by means of the driving
means, the magnetic force generated between the container body and
the lid changes. Specifically, when the magnets are aligned with
each other, or when the magnet is aligned with the magnetic member,
attractive magnetic force is generated between the lid and the
container body, whereby the lid is secured to the container body.
In contrast, when the magnets are displaced from each other, or
when the magnet is displaced from the magnetic member, the
attractive magnetic force generated therebetween is eliminated,
whereby the lid is released from the container body. Thereby, the
lid can be easily removed.
[0010] Further, according to the present invention, the
above-mentioned magnetic force operating unit includes a coil and a
magnetic member provided at positions corresponding to each other,
one of the positions lying in one of the container body and the
lid, and the other one of the positions lying in the other one of
the container body and the lid; and a control unit for controlling
electric current to flow through the coil.
[0011] Owing to this configuration, when the electric current to
flow through the coil is controlled by means of the control unit,
the magnetic force generated between the coil and the magnetic
member changes. When the coil generates attractive magnetic force
between the coil and the magnetic member, the lid is secured to the
container body. In contrast, when the electric current is stopped
so as to eliminate the magnetic force, or when the electric current
is caused to flow in the reverse direction so as to generate
repulsive magnetic force, the lid having been secured to the
container body is released therefrom. Thereby, the lid can be
easily removed.
[0012] Furthermore, according to the present invention, there is
provided a lid-mounted thin-plate housing container having a
container body for housing and supporting a plurality of thin
plates, and a lid detachably mounted to the container body for
sealing the interior of the container body, wherein the lid
includes a lid body, a lid plate, and a seal provided along the
entire of an abutting end portion of the lid body, the abutting end
portion of the lid body being adapted to abutting contact with the
lid plate. Also, the seal has a tongue portion which greatly
protrudes outwardly beyond the abutting end portion. The tongue
portion seals a gap formed between the lid plate of the lid and an
abutting end portion of the container body, the abutting end
portion of the container body being adapted to abutting contact
with the lid plate, or a gap formed between an outside wall of the
abutting end portion of the lid body and the inside wall of the
abutting end portion of the container body.
[0013] Thereby, the internal atmospheric pressure in the container
body is prevented from rising, whereby the interior of the
container body is reliably sealed.
BRIEF DESCRIPTION OF DRAWINGS
[0014] FIG. 1 is a perspective view showing a lid-mounted
thin-plate housing container 1 according to the present invention
(in a state in which the lid plate 13 is removed);
[0015] FIG. 2 is a perspective view showing the lid-mounted
thin-plate housing container 1 in a state in which the lid plate 13
of the lid 3 is removed;
[0016] FIG. 3 is an elevational view showing a lid-mounted
thin-plate housing container 1 according to the present
invention;
[0017] FIG. 4 is a plan view of a magnetic force operating unit
11;
[0018] FIG. 5 is a sectional view showing a main portion of a
container body 2 in a state in which the lid 3 is housed in the lid
housing portion of the container body 2;
[0019] FIG. 6 is a perspective view showing the lid-mounted
thin-plate container 1 in a state in which the lid 3 is attached to
the container body 2;
[0020] FIG. 7 is a perspective view showing the lid-mounted
thin-plate container 1 in a state in which the lid 3 is removed
from the container body 2;
[0021] FIG. 8 is a plan view showing a first modification;
[0022] FIG. 9 is an elevational view showing a second
modification;
[0023] FIG. 10 is a plan view showing a third modification; and
[0024] FIG. 11 is a sectional view showing a main portion of a
fourth embodiment.
BEST MODE FOR CARRYING OUT THE INVENTION
[0025] The best mode for carrying out the present invention will be
described referring to the attached drawings.
[0026] Referring to FIGS. 2 and 3, a lid-mounted thin-plate housing
container 1 according to an embodiment of the present invention
generally includes a container body 2 for housing and supporting a
plurality of silicon wafers 4 serving as thin plates, and lid 3
detachably mounted on the container body 2 for sealing the interior
of the container body 2.
[0027] The container body 2 is constituted by side walls 2A and 2B,
a front end wall 2C, and a rear end wall 20. Each of the walls 2A,
2B, 2C and 2D is made of transparent synthetic resin so that the
silicon wafers 4 housed in the container body 2 can be observed
from outside. Each of the end walls 2C and 2D is provided with an
engagement claw (not shown), which is gripped by a robot arm (not
shown) when the container 1 is transferred by a robot, and with
positioning means (not shown) for positioning the container 1 at a
predetermined place so as to set the container 1 thereat. In the
interior of the container body 2, there are provided side portion
supporting teeths 5A and 5B and bottom portion supporting teeths 6A
and 6B. Each of the teeths 5A, 5B, 6A and 6B is adapted to support
the plurality of silicon wafers 4 housed in the container body 2
one by one while spacing out the silicon wafers 4 by a
predetermined distance from neighboring wafers. Each of the teeths
5A, 5B, 6A and 6B has a plurality of notches which receive the
silicon wafers 4 one by one. The side portion supporting teeths 5A
and 5B are provided on the upper portions of the inside surfaces of
the side walls 2A and 2B, respectively, in the container body 2,
while the bottom portion supporting teeths 6A and 6B are provided
on the lower portions of the inside surfaces of the side walls 2A
and 2B, respectively, in the container body 2. Thereby, the side
portion supporting teeths 5A and 5B are adapted to support the side
portions of the silicon wafers 4 while the bottom portion
supporting teeths 6A and 6B are adapted to support the bottom
portions of the silicon wafers 4. The supporting teeths 5A, 5B, 6A
and 6B can be detached from the container 1 so that they can be
washed efficiently.
[0028] A lid housing portion 7 is formed in the upper portion of
the container body 2. The lid housing portion 7 is adapted to
receive the lid 3 to fit thereinto and house the lid 3 therein. The
lid housing portion 7 is formed by broadening the upper portion of
the container body 2 in such a shape as to match with that of the
lid 3. Magnets 8 are embedded at four corners of an enlarged stage
portion 7A of the lid housing portion 7, as shown in FIG. 5.
[0029] The lid 3 is constituted, as shown in FIGS. 1 and 5, by a
lid body 12 for housing therein a magnetic force operating unit 11,
a lid plate 13 for covering the lid body 12, and a seal 14 which is
provided along the entire abutting end portion 12A formed in the
lid body 12 (upper end portion of the lid body 12 (see FIG. 5), the
abutting end portion 12A serving to abutting contact with the lid
plate 13.
[0030] The lid body 12 is formed in the shape of a rectangular
shallow basin so that the lid body 12 can fit into the lid housing
portion 7 of the container body 2. The bottom of the lid body 12 is
formed with a raised portion whose cross section is in the shape of
a circular arc, as shown in FIGS. 1 and 3. The raised portion is
adapted to cover the upper portions of the silicon wafers 4 housed
in the container body 2 and to support the silicon wafers 4. At the
center portion of the raised portion 15, there is formed a long
groove 15A whose bottom is open and which houses therein a
resilient supporting member 16 made of rubber or the like. The
resilient supporting member 16 is adapted to abutting contact with
the upper end portions of the plurality of silicon wafers 4 housed
in the container body 2 so as to steadfastly support the silicon
wafers 4. At the four corners of the lid body 12, there are
provided supporting poles 17 for securing the lid plate 13 to the
lid body 12.
[0031] The size of the lid plate 13 is slightly larger than that of
the lid body 12, as shown in FIG. 5. The lid plate 13 has eaves 13A
which protrudes outwardly beyond the circumference of the lid body
12. The seal 14 is attached on the inside surface of the abutting
end portion 12A of the lid body 12. The cross section of the seal
14 is L-shaped, and the fore end portion of the seal 14 forms a
tongue portion 14A. The seal 14 is provided in such a manner that
the base end portion thereof is adhered on the inside surface of
the abutting end portion 12A while the fore end portion thereof,
serving as the tongue portion 14A, greatly protrudes outwardly
beyond the abutting end portion 12A and is adhered on the lower
surface of the eaves 13A of the lid plate 13. Owing to this
configuration, even when the lid body 12 of the lid 3 does not
match with the lid housing portion 7 of the container body 2 (that
is, even when the lid body 12 is smaller than the lid housing
portion 7 so that the lid body 12 is displaced transversely or
longitudinally), the tongue portion 14A is clamped between the
abutting end portion 7B of the lid housing portion 7 and the eaves
13A, the abutting end portion 7B serving to abutting contact with
the eaves 13A. Thereby, the interior of the container body 2 is
reliably sealed. Further, owing to the position where the seal 14
is provided, the container body 2 is kept unsealed till the moment
immediately before the lid 3 is completely housed in the lid
housing portion 7, so that the inner atmospheric pressure within
the container body 2 can be prevented from rising. It should be
noted that examples of the material of the seal 14 include
polyester series elastomers, silicon series elastomers, plyolefin
series elastomers, plystyrene/plyolefin block polymer series
elastomers, synthetic rubbers, and so on.
[0032] On the upper surface of the lid plate 13, there are formed
two long holes 13B, as shown in FIG. 1. Each of the two long holes
13B is adapted to allow fore end portion A of a robot arm
(hereinafter referred to as "robot-arm fore-end portion A") to be
inserted therethrough (see FIG. 6). When the robot-arm fore-end
portion A is inserted through the long holes 13B, the robot-arm
fore-end portion A fits into the magnetic force operating unit 11.
Thereby, when the robot-arm fore-end portion A is rotated by 45
degrees, the robot-arm fore-end portion A engages with the long
hole 13B and causes the magnetic force operating unit 11 to
operate.
[0033] At an upper portion of the container body 2 and a portion of
the lid 3, there are provided two magnetic force operating units
11. The magnetic force operating units 11 are adapted to operate
the magnetic force produced between the container body 2 and the
lid 3 so as to secure the lid 3 to the lid housing portion 7 of the
container body 2. Each of the magnetic force operating units 11 is
composed of two magnets 8 and two magnets 22, and one driving means
22 for moving either ones of the magnets 8 and 22.
[0034] The magnets 8, whose number is four in total, are embedded
respectively at the four corners of the extended stage portion 7A
of the lid housing portion 7, as descried above. The magnets 22 are
provided in the lid body 12 of the lid 3 in such a manner as to be
fixedly attached on the driving means 23.
[0035] The driving means 23 are provided at two positions in the
lid body 12 of the lid 3, and each of the driving means 23 is
adapted to support two magnets 22. A specific configuration of the
driving means 23 is as shown in FIG. 4. In FIG. 4, reference
numeral 25 denotes a rotational plate. At the center of the
rotational plate 25, there is formed a long hole 25A with which the
robot-arm fore-end portion A engages. The rotational plate 25 is
provided at such a position as to enable the long hole 25A to be
aligned with the long hole 13B of the lid plate 13. The rotational
plate 25 is composed of a pair of two disks which oppose to each
other and are spaced by a predetermined distance from each other.
Reference numeral 26 denotes arms attached to the rotational plate
25. Each of the magnets 22 is provided in the fore end of each arm
26 while the base end portion of each of the arms 26 is rotatably
supported by the rotational plate 25. Thereby, when the rotational
plate 25 is rotated by 45 degrees by the robot-arm fore-end portion
A, each magnet 22 moves by a distance a as shown by the imaginary
lines in FIGS. 4 and 5, whereby the magnetic force is controlled.
Specifically, when the respective magnets 22 are aligned with their
corresponding magnets 8, the corresponding magnets 22 and 8 attract
each other, whereby the lid 3 is secured to the container body 2.
In contrast, when the respective magnets 22 are displaced from
their corresponding magnets 8 by a distance a, the attractive
magnetic force having been established between the corresponding
magnets 8 and 22 disappears, whereby the lid 3 having been secured
on the container body 2 is released therefrom.
[0036] In the lid-mounted thin-plate housing container 1 having the
above-mentioned configuration, the lid 3 is automatically attached
and detached in such a manner as shown in FIGS. 6 and 7.
[0037] Specifically, when the lid 3 is detached, the robot-arm
fore-end portion A is oriented vertically and inserted into the
long hole 13B of the lid plate 13. Subsequently, the robot-arm
fore-end portion A is rotated by 45 degrees and engages with the
long hole 13B. Concurrently, the rotational plate 25 is also
rotated by 45 degrees, whereby each of the magnets 22 provided at
the fore end portion of the arm 26 is moved by a distance a.
Thereby, the magnets 22 are displaced by a distance a from the
position where the magnets 22 have been aligned with the
corresponding magnets 8 provided in the container body 2.
Accordingly, the attractive magnetic force having been established
therebetween disappears, whereby the lid 3, having been secured to
the container body 2, is released therefrom. Subsequently, the
robot-arm fore-end portion A is drawn by the robot whereby the lid
3 is removed from the container body 2.
[0038] When the lid 3 is attached, the lid 3 supported by the
robot-arm fore-end portion A is inserted into the lid housing
portion 7 of the container body 2 contrary to the above-mentioned
operations, and the robot-arm fore-end portion A is rotated by 45
degrees. Thereby, the respective magnets 22 are aligned with their
corresponding magnets 8 so that the magnets 22 and 8 attract each
other, whereby the lid 3 is secured to the container body 2.
[0039] At this occasion, the seal 14 functions at the last stage of
the operation of housing the lid 3 into the lid housing portion 7
of the container body 2. Specifically, at the moment when the
operation of housing the lid 3 into the lid housing portion 7 is
completed, the tongue portion 14A of the seal 14 is clamped between
the eaves 13A of the lid plate 13 and the abutting end portion 7B
of the lid housing portion 7, whereby the interior of the container
body 2 is sealed.
[0040] As described above, owing to the configuration in which the
lid 3 is secured to the container body 2 by means of the magnetic
force, no slidably contacting portion is formed when the lid 3 is
secured to the container body 2, so that generation of dusts or the
like caused by friction can be reliably prevented. Further, when
the user attaches or detaches the lid 3, he has only to operate the
magnetic force, for example, by displacing the magnets 22, so that
he can easily attach or detach the lid 3, and also secure the lid 3
steadfastly.
[0041] Further, when the interior of the container body 2 is
sealed, the tongue portion 14A of the seal 14 is clamped between
the eaves 13A and the abutting end portion 7B at the last stage of
the operation of housing the lid 3 into the lid housing portion 7
so as to seal the interior of the container body 2. Accordingly,
after the sealing, the lid 3 hardly moves. Therefore, the internal
atmospheric pressure within the container body 2 hardly rises when
the lid 3 is attached.
[0042] Further, owing to the configuration in which the interior of
the container body 2 is sealed by clamping the tongue portion 14A
between the eaves 13A and the abutting end portion 7B, the sealing
is reliably performed even when the lid body 12 of the lid 3 is
smaller than the lid housing portion 7 and accordingly the lid 3 is
displaced longitudinally or transversely within the lid housing
portion 7.
[0043] It should be noted that, while in the above-mentioned
embodiment, the driving means 23 is so configured as to be
constituted by the two arms 26, the driving means 23 may be
constituted as a link mechanism as shown in FIG. 8. The driving
means 23 of this configuration includes a rotational plate 32
having a long hole 31 at the center thereof, a upward-and-downward
movement link 34 which is moved in parallel up and down by rotating
the engagement pin 32A of the rotational plate 32 while keeping the
engagement pin 32A engaged with the long groove 34A, and magnet
supporting links 35, each of which has a base end connected to one
end of the upward-and-downward movement link 34 and a fore end
attached with one of the magnets 22. This configuration also
exhibits the same operations and advantageous effects as in the
above-mentioned embodiments.
[0044] Further, the magnetic force operating portion 11 may be
configured as shown in FIG. 9. Specifically, the magnetic force
operating portion 11 of the configuration shown in FIG. 9 includes
a rotational plate 42 having a bevel gear 41 at the bottom surface
thereof, bevel gears 43 each of which engages with the bevel gear
of the rotational plate 42 from left or right, rotational shafts 44
each extending from each of the bevel gears 43, and magnets 45
provided at the fore end portion of each of the rotational shafts
44. In this configuration, when the rotational plate 42 is rotated
by 45 degrees by the robot-arm fore-end portion A, each of the
magnets 45 is rotated by 180 degrees via the bevel gear 43 and the
rotational shaft 44 so that the N and S magnetic poles of the
magnet 45 are reversed. Thereby, the lid 3 is secured on the
container body 2, or the lid 3 having been secured to the container
body 2 is released therefrom. This configuration also exhibits the
same operations and advantageous effects as in the above-mentioned
embodiment.
[0045] Further, in the above-mentioned embodiment and its
modifications, magnets 8 and 22 are employed as means for operating
the magnetic force provided in the magnetic force operating portion
11. Alternatively, a coil may be employed, in place of the magnets
8 and 22, as means for operating the magnetic force, as shown in
FIG. 10. Specifically, a magnetic force operating unit 51 may be
constituted by members made of magnetic substance (not shown) (a
member made of magnetic substance is referred to "magnetic member"
throughout the specification and the appended claims and abstract)
provided at the four corners of the container body 2, coils 52
provided respectively at the four corners of the lid 3 (at the
positions lying in the lid body 12 and corresponding to the
magnetic members), a control unit 53 which is connected to the
coils 52 and has a built-in power supply for supplying electric
current so as to control electric current to be supplied to the
coil 52, and two sensors 54 provided in the vicinity of the
circumference of the rotational plate 25. In this configuration,
when the sensors 54 detect that the rotational plate 25 is rotated
in a direction in which the lid 3 is secured, the control unit 53
controls electric current to be supplied to the coil 52 according
to the detected result obtained by the sensors 54 so as to operate
the magnetic force. Specifically, the lid 3 is secured to the
container body 2 by causing electric current to flow in the
direction in which the coil 52 and the magnetic member attract each
other. In contrast, by stopping or reversing flow of the electric
current, fixation of the lid 3 is eliminated, and then the lid 3 is
removed by the robot. Note that, while in this configuration the
coil 52 and its related members are provided on the lid 3, the coil
52 and its related members maybe provided on the container body 2
if there is enough room to spare for attaching them.
[0046] Further, in the above-mentioned embodiment and its
modifications, explanation is made by way of the configuration in
which the electric force operating unit 11 is operated by a robot,
and the lid 3 is attached and detached by the robot-arm fore-end
portion A. Alternatively, a configuration in which the magnetic
force operating unit 11 is operated by the user with his hand and
the lid is manually attached and detached may be employed. This
configuration also exhibits the same operations and advantageous
effects as in the above-mentioned embodiment.
[0047] In the above-mentioned embodiment, the tongue portion 14A of
the seal 14 is provided in such a manner as to be clamped between
the eaves 13A and the abutting end portion 7B. Alternatively, the
tongue portion 14A may be provided between the lid body 12 of the
lid 3 and the lid housing portion 7. Specifically, in the case
where the lid body 12 is smaller than the lid housing portion 7 and
accordingly a gap in which the tongue portion 14A is interposed is
formed, the tongue portion 14A is adhered on the outer surface of
the abutting end portion 12A. Thereby, the tongue portion 14A is
brought into contact with the inner surface of the abutting end
portion 7B in a state that the tongue portion 14A is in contact
with the outer surface of the abutting contact portion 12A, so that
the tongue portion 14A seals the gap formed between the abutting
end portion 12A and the abutting end portion 7B. This configuration
also exhibits the same operations and advantageous effects as in
the above-mentioned embodiment.
[0048] Further, in the configuration according to the
above-mentioned embodiment, the four magnets 8 and 22 are
respectively provided at the four corners. Alternatively, the
numbers of magnets 8 and 22 may be 2, 3 or 5, respectively, in view
of the size of the lid-mounted thin-plate housing container 1 and
the attractive magnetic force needed. Further, the disposed
direction of the magnets 8 and 22 is not limited to the up-and-down
direction (the up-and-down direction in FIG. 2), but may be in the
left-and-right direction. Specifically, the magnets 8 may be
embedded in the side walls of the lid housing portion 7 so that the
direction of the magnetic force may be oriented in the
left-and-right direction.
[0049] Further, in the above-mentioned embodiment, on both of the
container body 2 and the lid 3, the magnets 8 and 22 are provided.
Alternatively, either of the magnets 8 and 22 may be replaced by
members made of magnetic substance, such as iron or the like. This
configuration also exhibits the above-mentioned operations and
advantageous effects.
[0050] Industrial Applicability
[0051] As described above, the lid-mounted thin-plate container 1
according to the present invention are useful when the container 1
is used for a carrier which needs to completely prevent dusts or
the like from entering, and which houses hard memory disks
(magnetic disks), substrates of compact disks (CD), silicon wafers
used for producing semiconductors, glass substrates for LCD, and
the like. Further, in addition to this use, the container 1 of the
present invention can be used as a container in which the lid 3 is
easily attached and detached, articles can be easily taken in and
out, dusts or the like is prevented from generating, and the
interior of the container body needs to be tightly sealed
reliably.
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