U.S. patent application number 17/076984 was filed with the patent office on 2021-02-11 for surface adhering mobile coating apparatus.
The applicant listed for this patent is URAKAMI LLC. Invention is credited to Fukashi URAKAMI.
Application Number | 20210039125 17/076984 |
Document ID | / |
Family ID | 1000005164452 |
Filed Date | 2021-02-11 |
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United States Patent
Application |
20210039125 |
Kind Code |
A1 |
URAKAMI; Fukashi |
February 11, 2021 |
SURFACE ADHERING MOBILE COATING APPARATUS
Abstract
A surface adhering mobile coating apparatus includes a surface
adhering and traveling device, a spray nozzle, and a spray nozzle
X-axis drive device, and a spray nozzle Y-axis drive device. An
operation procedure of the coating includes, regarding the timing
at which the spray command of the coating material is triggered to
the spray nozzle when the spray nozzle is moved from the start
point to the end point in the forward or return direction on the
X-axis, the timing is the trigger timing at which the spray nozzle
leaves the start point in the forward or return direction on the
X-axis, therefore, the timing at which the spray is actually
started is slightly delayed from the time when the spray nozzle
leaves the start point; regarding the timing at which the spray
stop command of the coating material is triggered to the spray
nozzle when the spray nozzle is moved from the start point to the
end point in the forward or return direction on the X-axis, the
timing is the trigger timing at which the spray nozzle reaches the
part just before the end point in the forward or return direction
on the X-axis, therefore, the timing at which the spray is actually
stopped is slightly delayed from the time when the spray nozzle
reaches the part just before the end point.
Inventors: |
URAKAMI; Fukashi; (Kanagawa,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
URAKAMI LLC |
Kanagawa |
|
JP |
|
|
Family ID: |
1000005164452 |
Appl. No.: |
17/076984 |
Filed: |
October 22, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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16414845 |
May 17, 2019 |
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17076984 |
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PCT/JP2017/039841 |
Nov 4, 2017 |
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16414845 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B25J 5/00 20130101; B62D
57/024 20130101; B05B 13/0405 20130101; B05B 12/02 20130101; B05B
13/04 20130101; B05B 12/00 20130101; B62D 57/02 20130101 |
International
Class: |
B05B 12/02 20060101
B05B012/02; B05B 13/04 20060101 B05B013/04; B25J 5/00 20060101
B25J005/00; B62D 57/024 20060101 B62D057/024; B05B 12/00 20060101
B05B012/00; B62D 57/02 20060101 B62D057/02 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 30, 2016 |
JP |
2016-233391 |
Claims
1. A surface adhering mobile coating apparatus, comprising; a
surface adhering and traveling device which adheres to the surface
of the structure by the action of negative pressure or by the other
actions to adhere to the surface and which travels along the
surface, a spray nozzle for spraying the coating material toward
the surface of the structure, and a spray nozzle X-axis drive
device for reciprocating the spray nozzle on the X-axis orthogonal
to the Y-axis which is a main moving axis line of the surface
adhering and traveling device, and a spray nozzle Y-axis drive
device for reciprocating the spray nozzle on the Y-axis; further
comprising; the spray width of the spray nozzle is wide in the
Y-axis direction and the spray width of the spray nozzle is narrow
in the X-axis direction; and the spray width on the Y-axis of the
spray nozzle is wider than one working distance on the Y-axis of
the spray nozzle Y-axis drive device; and an operation procedure of
the coating by the surface adhering mobile coating apparatus is
configured; first, the spray nozzle sprays a coating material, and
moves from the start point to the end point in the forward
direction on the X-axis; next, the spray nozzle moves from the
start point to the end point in the forward direction on the Y-axis
while stopping the spraying of the coating material; next, the
spray nozzle moves from the start point to the end point in the
return direction on the X-axis while spraying of the coating
material; next, the whole of the surface adhering mobile coating
apparatus travels on the Y-axis the same distance as the
approximate distance of the spray width of the spray nozzle; next,
the spray nozzle moves from the start point to the end point in the
return direction on the Y-axis while stopping the spraying of the
coating material; next, repeating the above-described operation
procedure; further comprising; regarding the timing at which the
spray command of the coating material is triggered to the spray
nozzle when the spray nozzle is moved from the start point to the
end point in the forward direction on the X-axis, the timing is the
trigger timing at which the spray nozzle leaves the start point in
the forward direction on the X-axis, therefore, the timing at which
the spray is actually started is slightly delayed from the time
when the spray nozzle leaves the start point; regarding the timing
at which the spray stop command of the coating material is
triggered to the spray nozzle when the spray nozzle is moved from
the start point to the end point in the forward direction on the
X-axis, the timing is the trigger timing at which the spray nozzle
reaches the part just before the end point in the forward direction
on the X-axis, therefore, the timing at which the spray is actually
stopped is slightly delayed from the time when the spray nozzle
reaches the part just before the end point; regarding the timing at
which the spray command of the coating material is triggered to the
spray nozzle when the spray nozzle is moved from the start point to
the end point in the return direction on the X-axis, the timing is
the trigger timing at which the spray nozzle leaves the start point
in the return direction on the X-axis, therefore, the timing at
which the spray is actually started is slightly delayed from the
time when the spray nozzle leaves the start point; regarding the
timing at which the spray stop command of the coating material is
triggered to the spray nozzle when the spray nozzle is moved from
the start point to the end point in the return direction on the
X-axis, the timing is the trigger timing at which the spray nozzle
reaches the part just before the end point in the return direction
on the X-axis, therefore, the timing at which the spray is actually
stopped is slightly delayed from the time when the spray nozzle
reaches the part just before the end point.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a divisional application of a prior application Ser.
No. 16/414,845, filed on May 17, 2019, pending, which is a
continuation application of a prior PCT application No.
PCT/JP/2017/039841 filed on Nov. 4, 2017.
TECHNICAL FIELD
[0002] The present invention relates to a surface adhering mobile
coating apparatus; which performs adhering to by an adhering unit
such as vacuum or magnet, and travelling on a wall surface or a
floor surface or a ceiling surface of the steel structures such as
ship hull or various kinds of tanks or bridges or pipes; or which
performs adhering to by an adhering unit such as vacuum or magnet,
and travelling on a wall surface or a floor surface or a ceiling
surface of the concrete structures such as various kinds of tanks
or buildings or water tanks or bridges or pipes; which further
performs spraying a coating material such as painting material or
thermal spraying material onto the surface of the structures.
BACKGROUND ART
[0003] As this kind of well-known technology, the "Device capable
of suction-adhering to a surface and moving therealong" disclosed
in the Japanese patent No. 2689127 and the "Device capable of
suction-adhering to a surface and moving therealong" disclosed in
the Japanese patent No. 2805614 are known. These patents were
invented by the inventor of the present invention.
The device comprises the main casing, the wheels secured to the
main casing as a means for mobility, the negative-pressure suction
seal connected to the main casing having the peripheral end portion
which is caused to contact the surface of an object, the negative
pressure forming means to discharge externally the liquid contained
in the negative pressure area defined by the main casing, the
surface and the negative-pressure suction seal, and the vacuum
breaker which makes envelopment fluid flow into the inside of the
negative pressure area and maintains the pressure of the area to
the predetermined vacuum pressure. That is, the vacuum breaker is a
kind of the relief valve for maintaining vacuum pressure to a fixed
degree of vacuum. The main casing must not necessarily be directly
equipped with the relief valve. In the suction hose which connects
the main casing, and a negative pressure generation means, the
portion close to the main casing of the suction hose may be
equipped with the relief valve. In such a device, the energization
of the negative pressure forming means causes the liquid inside the
said area to be discharged externally, and the pressure of the
liquid that acts on the main casing because of the liquid pressure
difference between the inside and the outside of the said area is
transmitted to the surface of an object via the wheels, such liquid
pressure allowing the device to adhere to the surface.
Additionally, the rotation of the wheels by way of a driving means,
such as an electric motor, during such adhesion state allows the
device to move along the surface by the action of the wheels. In
this device, various works on the surface of the structures can be
performed safely and efficiently by remote control.
[Patent Reference 1] Japan Patent No. 2689127
[Patent Reference 2] Japan Patent No. 2805614
[0004] In order to mount a spray unit for spraying a coating
material such as a coating material or a thermal spraying material
toward the surface of the structure on the "Device capable of
suction-adhering to a surface and moving therealong" disclosed in
Japan Patent No.2689127 and Japan Patent No.2805614, the device
need to be configured and operated as follows:
That is, the device must be configured and operated to ensure that
the film thickness of the coating material sprayed onto the surface
of the structure is uniform. In recent years, with the emergence of
large-scale marine structures, it is difficult to increase
maintenance and management costs and secure maintenance personnel.
Therefore, there are increasing applications of ultra-thick film
coating systems that have long-term durability even in harsh
corrosive environments, and that can apply the ultra-thick films
onto the surface of the structure by once application. These
ultra-thick film type coating systems include epoxy resin type,
polyurethane resin type and glass flake type. These ultra-thick
film type coating systems are solvent-free or high solid type, and
therefore are expected from the viewpoint of the improvement of the
global environment by reducing VOC (volatile organic compounds). As
described above, in recent years, the demand for ultra-thick
film-type painting has increased, a problem to be solved by the
present invention, a film thickness of, for example, 300 .mu.m is
secured by one-time spray coating, and to provide a device for
securing an uniform final film thickness of 600 .mu.m by
superposing them, and to provide a method for operating the
apparatus.
SUMMARY OF THE INVENTION
[0005] In order to solve the technical problems described above,
provided is the device according to an aspect of the invention,
comprising:
A surface adhering mobile coating apparatus, comprising; a surface
adhering and traveling device which adheres to the surface of the
structure by the action of negative pressure or by the other
actions to adhere to the surface and which travels along the
surface, a spray nozzle for spraying the coating material toward
the surface of the structure, and a spray nozzle X-axis drive
device for reciprocating the spray nozzle on the X-axis orthogonal
to the Y-axis which is a main moving axis line of the surface
adhering and traveling device, and a spray nozzle Y-axis drive
device for reciprocating the spray nozzle on the Y-axis; further
comprising; the spray width of the spray nozzle is wide in the
Y-axis direction and the spray width of the spray nozzle is narrow
in the X-axis direction; and the spray width on the Y-axis of the
spray nozzle is wider than one working distance on the Y-axis of
the spray nozzle Y-axis drive device; and an operation procedure of
the coating by the surface adhering mobile coating apparatus is
configured; First, the spray nozzle sprays a coating material, and
moves from the start point to the end point in the forward
direction on the X-axis; Next, the spray nozzle moves from the
start point to the end point in the forward direction on the Y-axis
while stopping the spraying of the coating material; Next, the
spray nozzle moves from the start point to the end point in the
return direction on the X-axis while spraying of the coating
material; Next, the spray nozzle moves from the start point to the
end point in the return direction on the Y-axis while stopping the
spraying of the coating material; After or at the same time as the
operation that the spray nozzle moves from the start point to the
end point in the return direction on the Y-axis while stopping the
spraying of the coating material, the whole of the surface adhering
mobile coating apparatus travels on the Y-axis the same distance as
the approximate distance of the spray width of the spray nozzle;
Next, repeating the above-described operation procedure; further
comprising; Regarding the timing at which the spray command of the
coating material is triggered to the spray nozzle when the spray
nozzle is moved from the start point to the end point in the
forward direction on the X-axis, the timing is the trigger timing
at which the spray nozzle leaves the start point in the forward
direction on the X-axis, therefore, the timing at which the spray
is actually started is slightly delayed from the time when the
spray nozzle leaves the start point; Regarding the timing at which
the spray stop command of the coating material is triggered to the
spray nozzle when the spray nozzle is moved from the start point to
the end point in the forward direction on the X-axis, the timing is
the trigger timing at which the spray nozzle reaches the part just
before the end point in the forward direction on the X-axis,
therefore, the timing at which the spray is actually stopped is
slightly delayed from the time when the spray nozzle reaches the
part just before the end point; Regarding the timing at which the
spray command of the coating material is triggered to the spray
nozzle when the spray nozzle is moved from the start point to the
end point in the return direction on the X-axis, the timing is the
trigger timing at which the spray nozzle leaves the start point in
the return direction on the X-axis, therefore, the timing at which
the spray is actually started is slightly delayed from the time
when the spray nozzle leaves the start point; Regarding the timing
at which the spray stop command of the coating material is
triggered to the spray nozzle when the spray nozzle is moved from
the start point to the end point in the return direction on the
X-axis, the timing is the trigger timing at which the spray nozzle
reaches the part just before the end point in the return direction
on the X-axis, therefore, the timing at which the spray is actually
stopped is slightly delayed from the time when the spray nozzle
reaches the part just before the end point.
[0006] The present invention provides the following effects.
That is, in the present invention, a remote control operation is
performed, a film thickness of, for example, 300 .mu.m can be
secured by one-time spray coating of the ultra-thick film type
coating material, further, it is superposed on each other to ensure
an uniform final film thickness of 600 .mu.m. In the present
invention, the scaffold is not required to be temporary, the risk
of falling of the worker from the scaffold is reduced, the cost can
be greatly reduced as compared with a conventional coating system
in which a thin film type coating is applied many times, the
construction period can be remarkably shortened
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a front view illustrating the first preferred
embodiment of the apparatus configured in accordance with the
present invention.
[0008] FIG. 2 is a right side view of the apparatus shown in FIG.
1.
[0009] FIG. 3 is a top view of the apparatus shown in FIG. 1.
[0010] FIG. 4 is a cross-sectional view of A-A in the apparatus
shown in FIG. 1.
[0011] FIG. 5 is a front view illustrating the operational
procedure of the coating 1 of the first preferred embodiment that
procedure is described in detail with reference to the
coordinates.
[0012] FIG. 6 is a right side view of the apparatus shown in FIG.
5.
[0013] FIG. 7 is a front view illustrating the operational
procedure of the coating 3 of the first preferred embodiment that
procedure is described in detail with reference to the
coordinates.
[0014] FIG. 8 is a right side view of the apparatus shown in FIG.
7.
[0015] FIG. 9 is a front view illustrating the trajectory of the
operational procedure of the coating of the first preferred
embodiment that procedure is described in detail with reference to
the coordinates.
[0016] FIG. 10 is a figure illustrating specifically the aspect of
device for each process of the operational procedure of the coating
of the first preferred embodiment that aspect is described in
detail with reference to the concrete coordinates.
[0017] FIG. 11 is a front view illustrating the operational
procedure of the coating 1 of the second preferred embodiment that
procedure is described in detail with reference to the
coordinates.
[0018] FIG. 12 is a front view illustrating the operational
procedure of the coating 3 of the second preferred embodiment that
procedure is described in detail with reference to the
coordinates.
[0019] FIG. 13 is a right side view of the apparatus shown in FIG.
11-12.
[0020] FIG. 14 is a front view illustrating the trajectory of the
operational procedure of the coating of the second preferred
embodiment that procedure is described in detail with reference to
the coordinates.
[0021] FIG. 15 is a figure illustrating specifically the aspect of
device for each process of the operational procedure of the coating
of the first preferred embodiment that aspect is described in
detail with reference to the concrete coordinates.
DETAILED DESCRIPTIONS OF THE PREFERRED EMBODIMENTS
[0022] Preferred embodiments of the device configured according to
the present invention will be described in detail below, referring
to the figures attached hereto.
[0023] FIG. 1 illustrates a front view of the device of the first
preferred embodiment of the present invention of that view is the
view from the direction away from the structure surface 1.
FIG. 1 shows the device is adhering to the structure surface 1 by
the action of negative pressure. In FIG. 1, the surface adhering
mobile coating apparatus of the first preferred embodiment is
comprised a surface adhering and traveling device which adheres to
the surface of the structure by the action of negative pressure,
and which travels up, down, rightward or leftward along the
structure surface 1. The surface adhering and traveling device is
comprised the spray nozzle 17, the rod-less cylinder 16 as the
X-axis drive device for a spray nozzle 17 and the rod-less cylinder
25 as the Y-axis drive device for a spray nozzle 17. In FIG. 1, the
axis in the vertical direction is referred to as the Y-axis, and
the axis in the horizontal direction is referred to as the
X-axis.
[0024] The surface adhering mobile coating apparatus is described
below with reference to FIGS. 1 to 10.
The surface adhering and traveling apparatus includes a main frame
4 and four geared motors 21. Each of the geared motors 21 is
attached to each of four corners of the main frame 4. In FIG. 1,
each angle at which the axes line of the output shaft of each
geared motor 21 intersects with the Y-axis is as follows. It is set
to a position rotated clockwise by 45 degrees, a position rotated
clockwise by 135 degrees, a position rotated clockwise by 225
degrees and a position rotated clockwise by 315 degrees. The output
shaft of each of the four geared motors 21 is mounted with a
commercially available omni-directional movable omni-wheel. The
device is arbitrarily moved in any one of four directions of
upward, downward, leftward and rightward in FIG. 1. Since the
control method of the movement direction by the omni wheel which is
a commercial item is publicly known, the description is omitted.
The negative pressure suction seal 2 is attached to the central
portion of the main frame 4. The negative pressure suction seal 2
is annularly formed of polyurethane as a raw material, and has a
shape that spreads like a trumpet as it approaches the structure
surface 1. The upstream end of the suction hose 45 is connected to
the suction hose joint 10 provided on the main frame 4, and the
downstream end of the suction hose 45 is connected to a negative
pressure generating means (not shown) such as a vacuum pump. The
cylinder case of rod-less cylinder 16 for driving the spray nozzle
in the X-axis is fixed to the main frame 4 of the surface adhering
and traveling apparatus, and the moving member 1601 of the rod-less
cylinder 16 can reciprocate in the X-axis direction. The moving
member 2501 of the rod-less cylinder 25 for driving the spray
nozzle in the Y-axis is fixed to the moving member 1601 of the
rod-less cylinder 16, and the cylinder case of rod-less cylinder 25
can reciprocate in the Y-axis direction. A spray nozzle 17 is fixed
to the upper end portion of the cylinder case of the rod-less
cylinder 25. The spray width of the spray nozzle 17 is wide in the
Y-axis direction and narrow in the X-axis direction. From the spray
nozzle 17, a coating material such as a paint is jetted toward the
structure surface 1 as shown by the imaginary line 101 in FIG. 1.
The spray width on the Y-axis of the spray nozzle 17 is wider than
the operation distance on the Y-axis of the rod-less cylinder 25
for driving the spray nozzle 17 on the Y-axis.
[0025] The action and effect of the above-described device is
described below. When the negative pressure generating means (not
shown) is energized, a fluid such as the air inside of the negative
pressure suction seal 2 is discharged to the outside through the
suction hose (not shown), and as a result, the inside of the
negative pressure suction seal 2 is reduced in pressure as
desired.
Once the inside of the negative pressure suction seal 2 is thus
reduced in pressure, the device adheres to the structure surface 1
by the pressure of the surrounding fluid such as the air acting on
the negative pressure suction seal 2, owing to the difference in
the fluid pressure between the inside and outside. When the
pressure inside the negative pressure suction seal 2 is maintained
at the desired pressure, the negative pressure suction seal 2 is
brought into strong contact with the structure surface 1 due to the
pressure difference between the inside and the outside of the
negative pressure suction seal 2. Thus, the fluid outside of the
negative pressure suction seal 2 is prevented as much as possible
from flowing into the inside of the negative pressure suction seal
2. The coating material such as a paint is sprayed from the spray
nozzle 17 toward the structure surface 1. The spray nozzle 17
reciprocates in the direction intersecting with the traveling
direction of the apparatus by the action of the rod-less cylinder
16 for driving the spray nozzle 17 on the X-axis. The area to be
coated in one forward pass or return pass of the spray nozzle 17 is
indicated by the spray pattern 101.
[0026] The operation procedure of the coating by the surface
adhering mobile coating apparatus is described below.
Note that the white arrows indicate the direction in which the
spray nozzle 17 moves immediately after the illustration, and the
black arrows indicate the direction in which the illustrated device
has moved immediately before the illustration. First, in FIG. 5,
the spray nozzle 17 moves from the starting point (X1, Y2) in the
forward direction on the X-axis to the end point (X4, Y2); Next,
the spray nozzle 17 moves from the starting point (X4, Y2) in the
forward direction to the end point (X4, Y5) on the Y-axis while
stopping the spraying of the coating material; Next, in FIG. 7, the
spray nozzle 17 moves from the starting point (X4, Y5) in the
backward direction on the X-axis to the end point (X1, Y5); Next,
the spray nozzle 17 moves from the starting point (X1, Y5) in the
backward direction to the end point (X1, Y2) on the Y-axis while
stopping the spraying of the coating material; Next, or
simultaneously with the movement from the starting point (X1, Y5)
in the backward direction to the end point (X1, Y2) on the Y axis
of the spray nozzle, the surface adhering mobile coating apparatus
travels on the Y-axis line the distance between the spray width
(|Y4-Y1|) and the approximate value on the Y-axis line of the spray
nozzle 17; Next, the above operation procedure is repeated. In the
surface adhering mobile coating apparatus configured as described
above; In FIG. 5, as for the activation timing that the spray
command of the coating material is issued to the spray nozzle 17
while the spray nozzle 17 is moving from the starting point (X1,
Y2) in the forward direction to the end point (X4, Y2) on the
X-axis, it is as follows; The activation timing of the timing is
the time when the spray nozzle 17 separates the starting point (X1,
Y2) in the forward direction (the time when the position sensor PS1
is turned off), therefore, the timing at which the spraying is
actually started is slightly delayed from the timing at which the
spraying starts (X2, Y2). Next, as for the activation timing that
the spray stop command of the coating material is issued to the
spray nozzle 17, it is as follows; The activation timing of the
timing is the time when the spray nozzle 17 reaches a portion just
before the end point (X4, Y2) in the forward direction (when the
position sensor PS3 is turned on), therefore, the timing at which
the spraying is actually stopped is the point (X4, Y2) slightly
delayed from the point (X3, Y2) at which the previous portion is
reached. In FIG. 7, as for the activation timing that the spray
command of the coating material is issued to the spray nozzle 17
while the spray nozzle 17 is moving from the starting point (X4,
Y5) in the backward direction to the end point (X1, Y5) on the
X-axis, it is as follows; The activation timing of the timing is
the time when the spray nozzle 17 separates the starting point (X4,
Y5) in the return direction (when the position sensor PS4 is turned
off), therefore, the timing at which the spray is actually started
is slightly delayed (X3, Y5) from the time (X4, Y5) at which the
separation occurs. Next, as for the activation timing that the
spray stop command of the coating material is issued to the spray
nozzle 17, it is as follows; The activation timing of the timing is
the time when the spray nozzle 17 reaches a portion immediately
before the end point (X1, Y5) in the return direction (when the
position sensor PS2 is turned on), therefore, the timing at which
the spraying is actually stopped is a point (X1, Y5) slightly
delayed from the point (X2, Y5) at which the previous portion is
reached.
[0027] FIG. 9 illustrates the details of the coating trajectory in
the operating procedure of the coating in the first preferred
embodiment with coordinates.
In the figure, a single diagonal hatching indicates a portion
coated with a single spray (for example, the film thickness is 300
.mu.m) by the spray nozzle, and a double grid hatching is twice
coated by the spray nozzle (for example, the film thickness is 600
.mu.m) is shown. The surface adhering mobile coating apparatus of
the present invention makes it possible to perform the coating
while repeating traveling up, left, down and right along the
structure surface while spraying the coating material onto the
structure surface, and makes it possible to perform the coating
with the uniform film thickness (for example, the total film
thickness is 600 .mu.m by twice coatings) excluding the structure
surface of the upper end and the lower end.
[0028] FIG. 10 illustrates the aspect of the apparatus for each
coating process by showing the concrete example of the coordinates
of each coating process in the first preferred embodiment.
[0029] The second preferred embodiment of the surface adhering
mobile coating apparatus of the present invention is described
below with reference to FIGS. 11 to 15.
Regarding the differences between the first preferred embodiment
and the second preferred embodiment, the spray nozzle driven unit
on the Y-axis is not provided in the second preferred embodiment
though the spray nozzle driven unit on the Y-axis is provided in
the first preferred embodiment. The second preferred embodiment
uses the traveling function of the surface adhering mobile coating
apparatus as the means to drive the spray nozzle 17 in the Y-axis
direction instead of the rod-less cylinder 25. The difference
between the first preferred embodiment and the second preferred
embodiment is the same except for the above, and the other
configuration is the same. Therefore, the description of the
overlapping parts is omitted. The configuration of the second
preferred embodiment is described below. The second preferred
embodiment of the surface adhering mobile coating apparatus,
comprising; a surface adhering and traveling device which adheres
to the surface of the structure by the action of negative pressure
or by the other actions to adhere to the surface and which travels
along the surface, a spray nozzle for spraying the coating material
toward the surface of the structure, and a spray nozzle X-axis
drive device for reciprocating the spray nozzle on the X-axis
orthogonal to the Y-axis which is a main moving axis line of the
surface adhering and traveling device; further comprising; The
spray width of the spray nozzle is wide in the Y-axis direction and
the spray width of the spray nozzle is narrow in the X-axis
direction; and an operation procedure of the coating by the surface
adhering mobile coating apparatus is configured; First, the spray
nozzle sprays a coating material, and moves from the start point to
the end point in the forward direction on the X-axis; next, the
whole of the surface adhering mobile coating apparatus travels on
the Y-axis the same distance as the approximate distance of 1/n of
the spray width of the spray nozzle; Next, the spray nozzle moves
from the start point to the end point in the return direction on
the X-axis while spraying of the coating material; Next, the whole
of the surface adhering mobile coating apparatus travels on the
Y-axis the same distance as the approximate distance of (n-1)/n of
the spray width of the spray nozzle; Next, repeating the
above-described operation procedure; further comprising; Regarding
the timing at which the spray command of the coating material is
triggered to the spray nozzle when the spray nozzle is moved from
the start point to the end point in the forward direction on the
X-axis, the timing is the trigger timing at which the spray nozzle
leaves the start point in the forward direction on the X-axis,
therefore, the timing at which the spray is actually started is
slightly delayed from the time when the spray nozzle leaves the
start point; Regarding the timing at which the spray stop command
of the coating material is triggered to the spray nozzle when the
spray nozzle is moved from the start point to the end point in the
forward direction on the X-axis, the timing is the trigger timing
at which the spray nozzle reaches the part just before the end
point in the forward direction on the X-axis, therefore, the timing
at which the spray is actually stopped is slightly delayed from the
time when the spray nozzle reaches the part just before the end
point; Regarding the timing at which the spray command of the
coating material is triggered to the spray nozzle when the spray
nozzle is moved from the start point to the end point in the return
direction on the X-axis, the timing is the trigger timing at which
the spray nozzle leaves the start point in the return direction on
the X-axis, therefore, the timing at which the spray is actually
started is slightly delayed from the time when the spray nozzle
leaves the start point; Regarding the timing at which the spray
stop command of the coating material is triggered to the spray
nozzle when the spray nozzle is moved from the start point to the
end point in the return direction on the X-axis, the timing is the
trigger timing at which the spray nozzle reaches the part just
before the end point in the return direction on the X-axis,
therefore, the timing at which the spray is actually stopped is
slightly delayed from the time when the spray nozzle reaches the
part just before the end point.
[0030] The apparatus of the preferred embodiment of the present
invention and the apparatus of the second preferred embodiment
described above have the following effects.
That is, in the present invention, a remote control operation is
performed, a film thickness of, for example, 300 .mu.m can be
secured by one-time spray coating of the ultra-thick film type
coating material, further, it is superposed on each other to ensure
the uniform final film thickness of 600 .mu.m. In the present
invention, the scaffold is not required to be temporary, the risk
of falling of the worker from the scaffold is reduced, the cost can
be greatly reduced as compared with the conventional coating system
in which the thin film type coating is applied many times, the
construction period can be remarkably shortened.
[0031] The preferred embodiments of the apparatus of the present
invention have been described above, in addition to the preferred
embodiment, various embodiments can be considered in accordance
with the claims.
[0032] The surface adhering mobile coating apparatus as described
above can be advantageously applied to a wide range of applications
as the device that performs adhering to by an adhering unit such as
vacuum or magnet, and travelling on a wall surface or a floor
surface or a ceiling surface of the steel structures such as ship
hull or various kinds of tanks or bridges or pipes; or that
performs adhering to by an adhering unit such as vacuum or magnet,
and travelling on a wall surface or a floor surface or a ceiling
surface of the concrete structures such as various kinds of tanks
or buildings or water tanks or bridges or pipes; that further
performs spraying a coating material such as painting material or
thermal spraying material onto the surface of the structures.
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