FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
& The Patent Rules, 2003
COMPLETE SPECIFICATION
1. TITLE OF THE INVENTION:
SEISMIC ISOLATION DRIVE DEVICEWITH ROLLING PART WITH FRICTION
FORCE REINFORCEMENT COATED ROLLING SURFACE
2. APPLICANT:
Name: JANG, Seong Cheol
Nationality: A Korean National
Address: 112 Dong 1601 Ho(Gajwa-dong, Gajwa Hansin Huplus), 402, Geonji-ro
Seo-gu Incheon 22810, Republic of Korea.
3. PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the invention and the manner in
which it is to be performed:
2
DESCRIPTION
TECHNICAL FIELD
[0001] The present invention relates to a seismic isolation
drive device having a rolling part with a friction forcereinforcement
coating on a rolling surface thereof, and more
particularly, to a seismic isolation apparatus including a
seismic isolation drive device according to the present
invention provided with a rolling part which is formed of a
hard material and on which balls (bearings) roll, the seismic
isolation drive device performing a seismic isolation
function. To prevent balls from moving out of the rolling
part due to a relatively great ball moving displacement
compared to the seismic intensity when a major earthquake
occurs, the hard rolling surfaces of the rolling part are
coated with a material having a great friction force such
that the friction force is remarkably increased without
causing a problem even under a heavy load and the balls have
a small displacement compared to the seismic intensity,
thereby exhibiting an effect in that the balls do not move
out of the rolling part even under a major earthquake.
BACKGROUND ART
[0002] As generally known, when a seismic isolation
apparatus including a seismic isolation drive device provided
with a rolling part formed of a hard material (to support a
heavy load) on which balls (bearings) roll is tested by using
3
a vibration table, since the hard balls (metal or engineering
plastic) and the hard rolling part (metal or engineering
plastic) meet, the balls roll too well in such a degree felt
like being rolled on an ice plate, and thus, a ball
displacement width is large compared to a seismic intensity.
[0003] That is, the related art disclosed in Korean Patent
No. 10-1410025, “Plastic bearing block assembly and seismic
isolation apparatus using same”, could not solve the problem
of movement of balls out of a friction surface due to a large
moving displacement of a plastic bearing block assembly when
the plastic bearing block assembly rolls on the friction
surface formed in an arc shape when an earthquake occurs.
[0004] Besides, the seismic isolation drive device which is
disclosed in Korean Patent No. 10-2015-0053866, “Seismic
drive device provided with ribs”, and includes an upper plate
and a lower plate on which ball bearings roll also could not
prevent, when an earthquake occurs, the ball bearing from
moving outside when operated along a rolling surface between
the upper plate and the lower plate.
[0005] In the configuration described above, since the size
of a seismic isolation drive device cannot be increased
infinitely, research has been continued to develop a seismic
isolation drive device which can withstand the great seismic
intensity within a limited size of the rolling part.
DISCLOSURE OF THE INVENTION
TECHNICAL PROBLEM
[0006] The present invention has been devised to solve the
above problems, and the purpose thereof is to solve a
limitation in that a ball moving displacement is increased
4
compared to a seismic intensity when using balls formed of a
hard material and a rolling part, which is formed of a hard
material and on which the balls roll, to withstand a heavy
load.
[0007] That is, the purpose of the present invention is to
make balls not to move out of a rolling part even under a
major earthquake by allowing the balls rolling on a rolling
surface of the rolling part, which constitutes a seismic
isolation drive device when an earthquake occurs, to have a
remarkably great friction force without a problem even under
a heavy load and thereby have a small moving displacement
compared to a seismic intensity.
[0008] In addition, a seismic isolation drive device
provided with a seismic isolation double floor to effectively
cope with an earthquake is proposed.
TECHNICAL SOLUTION
[0009] According to an embodiment of a seismic isolation
drive device or a seismic isolation apparatus having a
friction force reinforcement coating on rolling surface 112
of a rolling part 111 according to the present invention, a
seismic isolation apparatuses 100 is installed on equipment
including a communication apparatus, a server and disk
apparatus, an electrical power apparatus, a mechanical
apparatus or production apparatus, or on an object 140 for
protection provided with the equipment; and a space 113 which
is for providing an electricity or signal transmitting means
is provided between the respective seismic isolation
apparatuses 100,
[0010] wherein the rolling surfaces 112 of the rolling part
5
111 on which a ball 120 rolls between an upper plate 110a and
a lower plate 110b of the seismic isolation drive device
constituting the seismic isolation apparatus are formed in an
arc shape, and are formed of a material comprising metal or
engineering plastic which may withstand a load, an adhesive
for the coating 130 is applied on the rolling surfaces 112 of
the rolling part 111, a friction force reinforcing material
comprising urethane is coated on the adhesive by pressing the
material with a die while heating the material.
[0011] In addition, the present invention may improve a
seismic isolation effect by providing a double floor under
the seismic isolation apparatus.
[0012] In addition, the present includes: seismic isolation
drive devices 110 each comprising a rolling part 111 having a
rolling surface 112 formed in an arc shape and on which a
ball 120 and another ball roll between an upper plate 110a
and a lower plate 110b; and seismic isolation apparatuses 100
including the seismic isolation drive devices,
[0013] wherein: the rolling surfaces 112 of the rolling
parts 111 on which the balls 120 roll between the upper plate
110a and the lower plate 110b of the seismic isolation drive
device constituting the seismic isolation apparatus, are
formed in an arc shape, and are formed of a material
including metal which withstands a load; and
[0014] the rolling surfaces 112 of the rolling parts 111 are
coated with a friction force reinforcing material comprising
urethane.
[0015] In an embodiment, the coating may include: applying
an adhesive for the coating 130 on a surface of the rolling
surface 112; disposing and placing a friction force
6
reinforcing material comprising rubber, urethane, or a
composite resin on the adhesive; and pressing the resultant
by using a die having the same angle as the rolling surface
112 from above the rolling surface 112.
[0016] In another embodiment, the coating may include: a
sanding step of generating a bumpy shape on a surface of a
rolling surface by using a material including sand, silica,
or emery and thereby increasing an adhesive force; a cleaning
step of removing foreign substances including sand after the
sanding step; a step of adding a liquid or solid coating
material providing a friction force on to the rolling
surface; a step of pressing the coating material with a die
heated to a predetermined temperature; and
[0017] a step of performing heat treatment at a
predetermined temperature and for a predetermined time to
improve a coupling force.
[0018] The present invention having above-mentioned features
may be effectively used particularly in the case in which: a
displacement width and the width of the seismic isolation
apparatus have limits and should withstand a major earthquake
because the size of the displacement width in which the balls
move inside the rolling part including the upper plate and
the lower plate may not be expended infinitely when an
earthquake occurs; and since the load of the object for
protection is relatively heavy, a rolling part formed of a
hard material (metal or engineering plastic) which withstands
a heavy load should be used.
[0019] Representative seismic isolation apparatuses having
usages like the above may include a seismic isolation
apparatus for protecting servers or disks, a seismic
7
isolation apparatus for electrical power, a seismic isolation
apparatus for production apparatuses, a seismic isolation
double floor provided with a seismic isolation drive
apparatus to provide a seismic isolation function to the
double floor, and the like.
[0020] Thus, according to the present invention, a seismic
isolation apparatus, which has a rolling part having a small
width due to small movements of balls relative to a seismic
intensity while maintaining load withstanding power, may be
manufactured.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 is a perspective view illustrating an example
of a seismic isolation apparatus having a seismic isolation
drive device applied to protection target equipment in which
ball-bearing-type cables are used.
[0022] FIG. 2a is a perspective view illustrating the
importance of securing a cable insertion space when a seismic
isolation apparatus is applied in an individual case.
[0023] FIG. 2b is a perspective view illustrating the
importance of securing a cable survival space when an
individual case is used.
[0024] FIG. 3 is a perspective view illustrating an
embodiment of a seismic isolation drive device and a seismic
isolation apparatus using the seismic isolation drive device.
[0025] FIG. 4 is a perspective view illustrating a
comparison result of a rolling part according to the present
invention and a rolling part of an existing seismic isolation
apparatus.
[0026] FIG. 5 is a perspective view illustrating an
8
embodiment of a seismic isolation double floor formed by
using a seismic isolation drive device according to the
present invention.
[0027] FIG. 6 is a view of an embodiment illustrating the
installation of a coating and a seismic isolation drive
device.
[0028] FIG. 7 is a view of an embodiment illustrating a
method of installing an upper plate and a lower plate of a
seismic isolation apparatus and assembling a seismic
isolation apparatus.
MODE FOR CARRYING OUT THE INVENTION
[0029] Hereinafter, exemplary embodiments of the present
invention will be described in detail with reference to the
accompanying drawings.
[0030] First, when reference numerals are attached to the
components in each of the drawings, it should be noted that
the same components, although illustrated in different
drawings, have the same reference numerals as much as
possible. Further, when the embodiment of the present
invention is described, for the same substance, the detailed
description thereof is omitted.
[0031] Further, when a component is described as "connected
to", "coupled to" or "contacting" another component, the
component may be directly connected or contact the another
component, but a case in which a still another component is
"connected", "coupled" or "contacts" between each of the
components should also be understood as the same technical
idea.
[0032] Further, when a component is described as being
9
provided, formed or configured, the description should be
interpreted as having substantially the same meaning, unless
there is a specific definition thereof.
[0033] Also, in the present invention, the meaning of
"comprise" is an open-type meaning that means “may further
comprise other features.”
[0034] In the present invention, a communication apparatus,
a server and a disk apparatus, an electrical power apparatus,
a mechanical apparatus, or a production apparatus is an
example of equipment, and the equipment includes apparatuses.
[0035] In addition, in the present invention, there is a
description that a preferred shape of a rolling surface is an
arc shape, but the shape may be changed into other shapes
such as a recessed shape, a diamond shape or a pentagonal
shape in which a ball may move.
[0036] In the present invention, a rolling part includes a
ball, a rolling surface formed in an arc shape, and a space
portion therebetween. A seismic isolation device is a single
seismic isolation device including a rolling part and other
components (for example, a frame for fixing the rolling part
and a rolling part support), and a seismic isolation
apparatus includes two or more isolation drive devices.
[0037] According to the present invention, the seismic
isolation drive device having a friction force reinforcement
coating on the rolling surface of the rolling part, is
characterized by being configured such that: a strong
material that may well withstand a load is used for the
rolling part 111, in which inner rolling surfaces 112 of an
upper plate 110a and a lower plate 110b are formed in an arc
shape (arc type, etc.) so that a ball (ball bearing or ball
10
transfer) may roll thereon; and a friction-providing material
is coated on the rolling surface 112 of the rolling part 111.
[0038] In the present invention, the description is given to
the seismic isolation drive device 110 in which balls 120
(ball bearing, ball transfer, etc.) formed of a hard material
are used, and which is formed of a hard material while the
rolling part 111 is configured to have a space where the
balls 120 roll. In addition, for convenience of description,
the description is made based on a seismic isolation
apparatus 100 which is used to protect apparatuses or devices
such as a communication apparatus, a server and disk
apparatus, an electrical power apparatus, a mechanical
apparatus or a production apparatus, and the description is
made based on the seismic isolation apparatus 100 applied to
one apparatus (case) 140 for protection. However, the
present invention is not limited thereto, but may be applied
in all devices or structures which need protection from an
earthquake.
[0039] Hereinafter, the present invention having the above
configuration will be more specifically described with
reference to the accompanying drawings.
[0040] FIG. 1 is a perspective view illustrating an example
of a seismic isolation apparatus having seismic isolation
drive devices applied to protection target equipment in which
a ball-bearing-type cable is used.
[0041] FIG. 2a is a perspective view illustrating the
importance of securing a cable insertion space when a seismic
isolation apparatus is applied in an individual case.
[0042] FIG. 2b is a perspective view illustrating the
importance of securing a cable survival space when an
11
individual case is used.
[0043] When the seismic isolation drive device 110 of the
seismic isolation apparatus 100 according to FIG. 1 is mainly
used to protect equipment, the equipment is mainly installed
in a case or has a box shape. Accordingly, in the present
description, descriptions will be made based on an object 140
for protection which is a case.
[0044] The seismic isolation apparatus 100 including one or
more seismic isolation drive devices 110 of FIG. 1 is
installed under the object 140 for protection. At this point,
the width of the object 140 for protection which is a case is
mostly 600 mm, and the seismic isolation apparatus 100 which
is configured by providing the seismic isolation drive
devices 110 on both sides under the object 140 for protection,
is installed in a supporting form. In this case, two or more
seismic isolation drive devices 110 are coupled to constitute
the seismic isolation apparatus 100.
[0045] As shown in FIGS. 2a and 2b, since a cable, which is
an example of a means for transferring/transmitting
electricity or signals, is drawn out between the seismic
isolation apparatuses 100 and then enters the object 140 for
protection to thereby be connected to apparatuses, when a
displacement width of the seismic isolation apparatus 100 is
completely consumed by an earthquake, the problem of securing
a cable insertion space 113 is important. When examining
seismic isolation apparatuses 100 used worldwide in the
computer field, the width (breadth) of the narrowest seismic
isolation apparatus 100 is 273 mm, and the market share
thereof is also in the first place.
[0046] That is, considering that two seismic isolation
12
apparatuses should be used, the width (breadth) of the
seismic isolation apparatus 100 only is 546 mm. When the
displacement width of the seismic isolation apparatus 100 is
200mm, and a rack having the width of 600 mm is mounted on
the seismic isolation apparatus 100, there remains no or only
a few minimum cable survival space (which is a remaining
space after subtracting the displacement width from the cable
insertion space 113 and indicates a diameter of a cable
bundle) after consuming the cable insertion space 113 and the
displacement width.
[0047] Thus, when installed, the seismic isolation
apparatuses 100 are installed such that 250 mm or more of the
cable insertion space is secured between the seismic
isolation apparatuses 100. If the seismic isolation
apparatuses 100 are installed while further widening the
cable insertion space, the balance of the object 140 for
protection becomes unstable, a problem may occur in
exhibiting the best performance when an earthquake occurs,
waste of space occurs, the appearance becomes poor, and
operators step on the seismic isolation apparatuses 100.
[0048] The product having the width of 400 mm has a
displacement width of 140 mm to 200mm, which becomes rather
smaller than that of the product having the width of 273 mm.
Moreover, since the products have a greater width, the cable
insertion space 113 is small, and thus, the usage thereof is
remarkably limited. Due to the relationship between securing
of the cable insertion space 113 and the displacement width,
securing the displacement width becomes difficult as much.
[0049] Actually, the displacement width (the maximum
displacement to which the ball 120 included in the rolling
13
part 111 moves) of the product having the width of 273 mm is
200 mm, which is a large displacement width in this field.
That is, since the width of the rolling part 111 of the
seismic isolation apparatus 100 is restricted, the size of
the rolling surface 112 thereby becomes very restricted.
[0050] Since the displacement width of 200mm is the best
grade, operators cannot help saving the displacement of only
10mm, and cannot help feel the displacement of only 10mm
precious. In the case of an earthquake, the object 140 for
protection may become stable or may be damaged by the
displacement of only 1 mm.
[0051] The above description is provided to explain that the
displacement width cannot be infinitely widened so as to
manufacture the seismic isolation apparatuses. In addition,
since technical problems as well as cost problems and space
problems overlap, there may be a limitation in the
displacement width.
[0052] In the present invention, instead of increasing the
displacement width, the lack of displacement width is to be
solved by increasing the friction force of the rolling
surface 112 and thereby allowing the ball 120 to have a small
moving displacement even under the same seismic intensity.
When a test was performed under the same seismic intensity,
it can be understood that there is a substantial difference
between the moving distances of the balls 120 on the rolling
surface 112 of a general metal surface and on the rolling
surface with a coating 130, and that there is a substantial
effect of saving the displacement width due to the friction
of the rolling surface with the coating 130.
[0053] As shown in the above, there is required a technique
14
to narrow the width of the seismic isolation apparatus 100
while allowing the rolling surface 112 to have a diameter
(displacement width) which may cope with a major earthquake.
Recently, newly built data center buildings are designed on
the basis of an earthquake-resistant design of Richter scale
magnitude of 7.0 or more, and the displacement widths of
worldwide seismic isolation apparatuses 100 in the data
center field mostly have a reference of 200mm to get ready
for a major earthquake.
[0054] In addition, since computer equipment is
substantially heavy, a hard material (metal such as steel or
stainless steel, or engineering plastic) is used as the
material for the rolling part 111, and steel balls are used
for the ball 120. A soft material may increase friction and
further enhance the effect against an earthquake, but
unfortunately, in light of characteristics of the seismic
isolation apparatus 100 which should continuously withstand a
heavy load, a hard material is inevitably used because it is
difficult to withstand a load by using a soft material.
[0055] As shown in the above, when the rolling part 111
formed of a hard material and the ball 120 formed of a hard
material meet, the balls roll in a feeling like rolling on an
ice plate. That is, since the rolling surface 112 has small
friction, a greater moving displacement is consumed compared
to the seismic intensity. Accordingly, since the seismic
isolation apparatus 100 formed of the conventional material
even under such a seismic intensity consumes a greater
displacement width compared to the seismic intensity, it is
impossible to cope with a major earthquake.
[0056] As shown in FIG. 2a, a double floor 150 is provided
15
under the seismic isolation apparatus 100 and thus increasing
of seismic isolation performance, cable treatment, and the
like may be effectively carried out.
[0057] FIG. 3 is a perspective view illustrating an
embodiment of a seismic isolation drive device and a seismic
isolation apparatus using the seismic isolation drive device,
FIG. 4 is a perspective view illustrating a comparison result
of a rolling part according to the present invention and a
rolling part of an existing seismic isolation apparatus, and
FIG. 5 is a perspective view illustrating an embodiment of a
seismic isolation double floor formed by using a seismic
isolation drive device according to the present invention.
[0058] As shown in FIG. 3, a coating 130 with a material
(raw material) having a great friction force is provided on a
hard rolling surface 112 to minimize a moving displacement
compared to the seismic intensity through an increase in
friction force.
[0059] In the meantime, although many tests had been
performed by attaching a great friction force material
through a double adhesive sticker, it was found that when a
great friction force material attached through an adhesive
method was applied to an object 140 for protection having a
heavy load, the seismic isolation function could not be
smoothly performed due to a phenomenon in which balls 120
pressed the great friction force material due to the load and
the sticker was pushed and torn or was folded by being pushed.
[0060] That is, the method in which a material having a
friction force is attached to the rolling surface 112 in a
form of a double adhesive sticker may not be used in the
seismic isolation field.
16
[0061] Also in performing the coating 130, the selection of
the material of the coating 130 and the thickness of the
coating 130 are very important, and an example of a method
for performing the coating 130, which is integrally formed on
the rolling part 111 with the rolling surface 112, will be
described with reference to FIG. 6.
[0062] Since the material of the coating 130 should have a
great friction force, a coating material such as rubber or
urethane having a great friction coefficient is selected, an
adhesive for the coating 130 is applied on a surface of the
rolling surface 112, the material with a great friction force
is disposed and placed on the adhesive, and then the
resultant object is pressed by using a die having the same
angle as the rolling surface 112 from above the rolling
surface 112.
[0063] In this case, the thickness of the coating 130 should
be considered for the die, and if necessary, the die is
heated to increase a coating effect.
[0064] An important point in providing the coating 130 is
that the rolling surface 112 and the coating material should
be integrated like one body. Otherwise, due to a load, a
portion of the coating 130 is torn by the balls 120 or folded
by a push, and thus, rolling of the balls 120 is rather
interrupted.
[0065] Various materials may be used as the material for the
coating 130. However, when a friction force is too strong,
the balls may not roll, and when the friction force is too
weak, there is no coating effect. Therefore, an appropriate
material having a substantially greater friction force than
metal should be used, and as a representative example, using
17
(synthetic) rubber, urethane, or chemically synthesized
materials may be easy to handle the material, achieve a great
friction force, and may be cheap from the cost aspect.
Accordingly, a material which is strong against a load and
which may be coated may be used for the rolling part 111.
[0066] In addition, another embodiment of a coating method
will be described.
[0067] A bumpy shape is generated on a surface of a rolling
surface by using a material including sand, silica, or emery,
and a sanding step for increasing an adhesive force is
performed.
[0068] After the sanding step, a cleaning step of removing
foreign substances such as sand or dusts is performed.
[0069] A step of adding a coating material is performed, the
step including applying, inputting or attaching a liquid or
solid coating material having a friction force on the rolling
surface.
[0070] A step of pressing the coating material by using a
die heated to a predetermined temperature;
[0071] a step of heat treating at a predetermined
temperature for a predetermined time to improve an adhesive
force; and a step of maturing the heat-treated or matured
rolling surface at room temperature for a predetermined
period are performed.
[0072] In the above, it is preferable to press for 20-30
minutes by a die heated to 100-120 degrees (Celsius), and
through a step in which a raw material is input on to the
rolling surface, is pressed by using the die so as to make
the raw material to finely adhere to everywhere on the
surface of the rolling surface, the shape of the coating is
18
achieved.
[0073] In the above-mentioned step, when the temperature is
lower than 100 degrees, it is inefficient because curing is
delayed, and thus, the pressing takes a long time, and when
the temperature exceeds 120 degrees, curing is too fast, and
thus, characteristics of the coating become poor.
[0074] In addition, in another example, heat treating is
performed by using a type of heating means such as an oven at
100-120 degrees (Celsius) for at least 12-16 hours, but the
longer the better.
[0075] In the above step, the shaped and coated rolling part
is input to an oven, and a coupling force is improved, and
the rolling part is cured to be hard up to the inside thereof.
Without passing through this step, a product becomes to have
defective characteristics and thereby have decreased quality.
Through the step, a tissue coupling force is improved.
[0076] In the above, the coating thickness is 0.3-0.9 mm.
When the coating is too thick, friction becomes so strong
that the ball bearings hardly move, and when the coating is
too thin, the balls roll so well that the seismic isolation
performance is decreased. The most optimal thickness is 0.5-
0.7 mm.
[0077] As described above, the coating 130 with a material
having a friction force is formed on the rolling part 111,
and thus, the seismic isolation apparatus 100 having a small
moving displacement compared to the seismic intensity may be
manufactured. In addition, the seismic isolation apparatus
100 may be manufactured by disposing the rolling part 111 to
adapt to a usage.
[0078] For example, as shown in FIG. 3, the seismic
19
isolation apparatus 100 may also be manufactured by coupling
the rolling part 111, and as shown in FIG. 5, a seismic
isolation double floor 200 may also be manufactured, and
various types of seismic isolation apparatuses 100 may be
developed by using the rolling part 111 according to the
present invention.
[0079] Equipment including a communication apparatus, a
server and disk apparatus, an electrical power apparatus, a
mechanical apparatus or a production apparatus, or an object
140for protection provided with the equipment;
[0080] an access floor provided directly on the equipment or
under the object for protection; and a seismic isolation
drive device or a seismic isolation apparatus provided
directly on the access floor or under a support frame for
supporting the access floor are provided, wherein: a rolling
surface 112 of a rolling part 111 which includes a ball 120
and the rolling surface 112 on which the ball 120 rolls
between an upper plate 110a and a lower plate 110b of the
seismic isolation drive device which constitutes the seismic
isolation apparatus, is formed in an arc shape , is formed of
a material including metal which may withstand a load; and
[0081] the rolling surface 112 of the rolling part 111 is
coated with a friction force-reinforcing material including
urethane.
[0082]
[0083] In the present invention, as an example, in FIG. 3,
in order to more quickly and accurately return the ball which
has been moving to the left or to the right on the arc-shaped
rolling surface, to the center which is an original position,
a shallow groove (for example, having a horizontal diameter
20
of 5 mm or less and a vertical diameter of 2 mm or less)(not
shown) may be formed on the center of the rolling surface
itself. This may allow for a quick return to the original
position after performing the seismic isolation function.
[0084]
[0085] FIG. 4 is a view illustrating an operation example of
a general metal rolling part (upper drawing) and a seismic
isolation apparatus (lower drawing) provided with a coated
rolling part according to the present invention, when
earthquakes having the same intensity occur.
[0086] FIG. 6 is a view of an embodiment illustrating
installation of a coating and a seismic isolation drive
device.
[0087] FIG. 7 is a view of an embodiment illustrating a
method of installing an upper plate and a lower plate of a
seismic isolation apparatus and assembling the seismic
isolation apparatus.
[0088]
[0089] So far, although technical idea of the present
invention has been described with the accompanying drawings,
this does not limit the present invention but merely
describes exemplary embodiments of the present invention.
Furthermore, it is obvious that any person skilled in the art
obviously could carry out various modification and imitation
without departing from the scope of technical idea of the
present invention.
[0090] The present invention may be directly applied in
equipment which needs protection or may be applied not only
in a structure provided with the equipment or the like which
needs protection but also in general buildings, or facilities,
21
and the like.
[0091] Furthermore, other materials having substantial
strength, no brittleness, and durability may also be used as
a material which constitutes a rolling surface, and a
material coated on the rolling surface may be a solid, liquid,
or the like.
INDUSTRIAL APPLICABILITY
[0092] The present invention may be applied in all equipment,
facilities, structures, and the like which need protection
when an earthquake occurs.
22
I CLAIM:
1. A seismic isolation drive device constituting a
seismic isolation apparatus and having a friction
reinforcement coating on rolling surfaces (112) of a rolling
part (111),
wherein the seismic isolation apparatus is installed on
equipment including a communication apparatus, a server and
disk apparatus, an electrical power apparatus, a mechanical
apparatus, a production apparatus, or on an object for
protection provided with the equipment,
a space (113) for providing an electricity or signal
transmitting means is provided between the respective seismic
isolation apparatuses,
the rolling surfaces (112) formed in arc shape and on
which a ball rolls between an upper plate and a lower plate
of the seismic isolation drive device, are formed of a
material comprising metal or engineering plastic which
withstands a load;
an adhesive for the coating is applied on the rolling
surfaces (112) of the rolling part (111); and
a friction force reinforcement material comprising
urethane is coated on the adhesive by pressing the material
with a die while heating the material.
2. The seismic isolation drive device having a
friction force reinforcement coating on a rolling surface of
a rolling part of claim 1, wherein a double floor is provided
under the seismic isolation apparatus.
23
3. A seismic isolation drive device constituting a
seismic isolation apparatus and having a friction
reinforcement coating on a rolling surface of a rolling part,
the seismic isolation drive device comprising a rolling part
having rolling surfaces formed in an arc shape and on which a
ball rolls between an upper plate and a lower plate; and
the seismic isolation apparatus performing a seismic
isolation function,
wherein a space for providing an electricity or signal
transmitting means is provided between the seismic isolation
apparatuses;
the rolling surfaces formed in the arc shape and on
which the ball rolls between the upper and lower plates of
the seismic isolation drive device constituting the seismic
isolation apparatus, are formed of a material comprising
metal which withstands a load;
and the rolling surface of each rolling part is coated
with a friction force reinforcing material comprising
urethane.
4. A seismic isolation drive device constituting a
seismic isolation apparatus and having a friction
reinforcement coating on rolling surfaces (112) of a rolling
part, the seismic isolation drive device comprising the
rolling part having the rolling surfaces (112) formed in an
arc shape and on which a ball rolls between an upper plate
and a lower plate;
wherein:
the rolling surfaces (112) of the rolling part on which
the ball rolls between the upper plate and the lower plate of
24
the seismic isolation drive device, is formed of a material
comprising metal which withstands a load; and
the rolling surfaces of the rolling part are coated
with a friction force reinforcing material comprising
urethane.
5. The seismic isolation drive device having a
friction reinforcement coating on a rolling surface of a
rolling part of claim 4, wherein
a groove is formed at a center of the rolling surface
itself.
6. The seismic isolation drive device having a
friction reinforcement coating on a rolling surface of a
rolling part of claim 3 or 4, wherein the coating comprises:
applying an adhesive for the coating on a surface of
the rolling surface;
disposing and placing a material which comprises
urethane or a composite resin and reinforces a friction force
on the adhesive; and
pressing the resultant by using a die having the same
angle as the rolling surface from above the rolling surface.
7. The seismic isolation drive device having a
friction reinforcement coating on a rolling surface of a
rolling part of claim 3 or 4, wherein the coating comprises:
a sanding step of generating a bumpy shape on a surface
of a rolling surface by using a material including sand,
silica, or emery and thereby increasing an adhesive force;
a cleaning step of removing foreign substances
25
including sand after the sanding step;
a step of adding a liquid or solid coating material
providing a friction force on to the rolling surface;
a step of pressing the coating material with a die
heated to a predetermined temperature; and
a step of performing heat treatment at a predetermined
temperature and for a predetermined time to improve a
coupling force .
8. The seismic isolation drive device having a
friction reinforcement coating on a rolling surface of a
rolling part of claim 7, wherein
the pressing is performed by the die heated to 100-120
degrees (Celsius) for 20-30 minutes.
9. The seismic isolation drive device having a
friction reinforcement coating on a rolling surface of a
rolling part of claim 7, wherein
the heat treatment is performed at 100-120 degrees
(Celsius) for at least 12-16 hours.
10. The seismic isolation drive device having a
friction reinforcement coating on a rolling surface of a
rolling part of claim 7, wherein
a thickness of the coating is 0.3-0.9 mm.
11. A seismic isolation drive device constituting a
seismic isolation apparatus and having a friction
reinforcement coating on rolling surfaces of a rolling part,
wherein the seismic isolation drive device or the
26
seismic isolation apparatus is provided under an access floor
or under a support for supporting the access floor,
the access floor corresponds to a double floor provided
under equipment or an object for protection, wherein the
equipment comprises a communication apparatus, a server and
disk apparatus, an electrical power apparatus, a mechanical
apparatus, or a production apparatus, and the object for
protection is provided with the equipment,
wherein the rolling surfaces of the rolling part which
are formed in an arc shape and on which a ball rolls between
an upper plate and a lower plate of the seismic isolation
drive device, are formed of a material including metal which
withstands a load; and
the rolling surfaces of the rolling part are coated
with a friction force reinforcing material comprising
urethane.