Coating device and coating method

Abstract

To provide a coating device and a coating method capable of coating high places without setting up temporary scaffolding.SOLUTION: A coating device 1 for coating an inner wall surface 11 (inside a structure) includes a base portion 2 installed on a floor portion 12 of a structure, a column portion 3 provided on the base portion 2 and capable of extending and contracting in the vertical direction, a pressing portion 4 provided at an upper end portion 3a of the column portion 3 and pressed against a ceiling 13 by extending the column portion 3 toward the ceiling 13 of the structure, a coating portion 5 that elevates and lowers along the column portion 3 and discharges the coating material onto the inner wall surface 11, and an elevating portion 6 that elevates and lowers the coating portion 5.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a coating device and a coating method.

Background Art

[0002] Normally, in painting work at high places such as the outer wall or inner wall of a structure, a temporary scaffold is installed for the work (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When performing painting at high places, if the painting location is provided in a narrow area or there are interfering objects near the painting location, it may be impossible to secure space for installing a temporary scaffold, making the painting work difficult.

[0005] Therefore, an object of the present invention is to provide a coating device and a coating method capable of performing high-place painting without providing a temporary scaffold.

Means for Solving the Problems

[0006] To achieve the above object, a coating device according to the present invention is a coating device for coating the inside of a structure, and includes a base installed on the floor of the structure, a support column provided on the base and capable of expanding and contracting in the vertical direction, a pressing portion provided at the upper end of the support column and pressed against the ceiling when the support column is extended toward the ceiling of the structure, a coating portion that moves up and down along the support column and coats the inside of the structure at a predetermined height, and a lifting portion that lifts and lowers the coating portion.

[0007] In order to achieve the above object, the painting method according to the present invention is a painting method for painting the interior of the structure using the above painting apparatus. In the painting method, the pressing portion is pressed against the ceiling by extending the support column portion, and a painting apparatus installation step of installing the painting apparatus in a stretched state between the floor portion and the ceiling is provided. A lifting step of lifting and lowering the painting portion to a predetermined height, and a painting step of painting the interior of the structure with the painting portion disposed at the predetermined height.

[0008] In the present invention, by extending the support column portion, the pressing portion is pressed against the upper ceiling, and by installing the painting apparatus in a stretched state between the floor portion and the ceiling, the painting apparatus can be fixed between the floor portion and the ceiling. Since the painting portion for performing painting in this state can be lifted and lowered, the painting portion can be lifted and lowered from the height of the floor portion to the height of the ceiling to paint the interior of the structure. Thereby, painting at a high place can be performed without providing a temporary scaffold. As a result, even when the painting location is provided in a narrow portion or there is an interfering object near the painting location and it is difficult to install a temporary scaffold, the painting of the painting location (the interior of the structure) can be performed. In addition, the cost and construction period required for installing the temporary scaffold can be reduced.

[0009] Further, in the painting apparatus according to the present invention, the elevating portion may include a pulley provided at an upper end portion of the support column portion, a reel provided at the base portion, a wire having one end connected to the reel, wound around the pulley, and wound out and wound up by the reel, and a painting support portion that is fixed to the other end of the wire and supports the painting portion and is lifted and lowered by winding out and winding up the wire.

[0010] With such a configuration, the painting portion can be lifted and lowered with a simple structure, and even when the height of the support column portion is different, the painting portion can be lifted and lowered in the same manner.

[0011] In addition, in the painting apparatus according to the present invention, the painting support portion has a restricting portion that restricts movement of the column portion. The restricting portion includes a cylindrical portion through which the column portion is inserted so as to be relatively movable in the vertical direction, and a bag body that is attached to the inner peripheral surface of the cylindrical portion and expands when air is injected. When the bag body expands and contacts the outer peripheral surface of the column portion, the relative movement of the column portion in the vertical direction may be restricted.

[0012] With such a configuration, the painting portion can be fixed at a desired height by expanding the bag body.

Effect of the Invention

[0013] According to the present invention, painting at a high place can be performed without providing a temporary scaffold.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0015] Hereinafter, a painting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1-5. As shown in FIGS. 1 and 2, the painting apparatus 1 according to the present embodiment is an apparatus for painting the inner wall surface 11 (inside of the structure) of a structure. In the present embodiment, it is assumed that waterproof painting is performed on the inner surface (inner wall surface 11) of the outer wall of the basement floor of a nuclear power plant reactor building. The height from the floor portion 12 to the ceiling 13 of the basement floor of the nuclear power plant reactor building is about 11000 mm. The coating device 1 is installed on the floor portion 12 and faces the inner wall surface 11 in the horizontal direction. In the following description of the coating device 1, when installed, the side where the inner wall surface 11 is located with respect to the coating device 1 is the front side, the side where the coating device 1 is located with respect to the inner wall surface 11 is the rear side, and the horizontal direction connecting the coating device 1 and the inner wall surface 11, that is, the direction orthogonal to the inner wall surface 11, is the front-rear direction (the direction of the arrow Y in the figure). The horizontal direction orthogonal to the front-rear direction, that is, the horizontal direction along the inner wall surface 11, is the width direction (the direction of the arrow X in the figure).

[0016] The coating device 1 includes a base portion 2 installed on the floor portion 12, a support column portion 3 provided on the base portion 2 and capable of expanding and contracting in the vertical direction, a pressing portion 4 provided at the upper end portion of the support column portion 3 and pressed against the ceiling 13 by extending the support column portion 3 toward the ceiling 13, a coating portion 5 that moves up and down along the support column portion 3 to perform coating, and a lifting portion 6 that lifts and lowers the coating portion 5.

[0017] As shown in FIGS. 1 - 3, the base portion 2 includes a main body portion 21 that supports the support column portion 3, casters 22 (see FIGS. 1 and 2) attached to the lower portion of the main body portion 21 and capable of traveling on the floor surface 121, and outriggers 23 (see FIG. 3) fixed to both sides in the width direction of the main body portion 21. The base portion 2 of the present embodiment assumes, for example, that the dimension in the front-rear direction is about 2000 mm, the dimension in the width direction is about 1500 mm with the outriggers 23 folded, and about 3000 mm with the outriggers 23 extended. The coating device 1 is movable on the floor surface 121 by running the casters 22. A stopper or the like for regulating the running of the casters 22 may be provided as appropriate.

[0018] The support column portion 3 has a lower end portion 3b fixed to the base portion 2 and extends upward from the base portion 2. The support column portion 3 has a plurality of column members 31 arranged in a nested manner in a cylindrical shape with different diameters. The support column portion 3 is in an extended state where the column member 31 arranged inside is arranged above the column member 31 arranged outside, and is in a contracted state where all the column members 31 are arranged overlapping at the same height.

[0019] As shown in FIGS. 1 and 2, a pulley support portion 61 of the elevating portion 6 is provided at the upper end portion 3a of the support column portion 3, and a pressing portion 4 is provided on the pulley support portion 61. In the present embodiment, by expanding and contracting the support column portion 3, the height of the pressing portion 4 from the floor surface 121 can be arranged to be about 3700 mm to 11400 mm. That is, when the support column portion 3 of the painting apparatus 1 is extended toward the ceiling 13, the pressing portion 4 (the upper end portion 3a of the support column portion 3) reaches the ceiling 13, and the pressing portion 4 can be pressed against the ceiling 13. The pulley support portion 61 is a member to which a pulley 62 of the elevating portion 6 is attached. Details of the pulley support portion 61 will be described later. The pressing portion 4 has a spring portion 41 that can be elastically deformed in the vertical direction. For this reason, when the support column portion 3 is extended and pressed against the ceiling 13, the spring portion 41 of the pressing portion 4 is elastically deformed, and it is in a state of being stretched in the vertical direction between the ceiling 13 and the pulley support portion 61 by its restoring force. When the support column portion 3 of the painting apparatus 1 is in a state of being stretched in the vertical direction between the ceiling 13 and the pulley support portion 61 as described above, it is fixed to the floor portion 12 and the ceiling 13.

[0020] As shown in FIGS. 4 and 5, the painting portion 5 has a paint storage portion 51 that stores the paint 53, and a spray gun 52 that discharges the paint 53 supplied from the paint storage portion 51. The painting portion 5 may be provided with a painting direction adjusting mechanism for adjusting the painting direction of the spray gun 52. The painting portion 5 may be provided with a position fine adjustment mechanism capable of finely adjusting the positions of the spray gun 52 in the vertical direction, width direction, and front-rear direction.

[0021] As shown in FIGS. 1 and 2, the elevating portion 6 includes a pulley support portion 61 provided at the upper end portion 3a of the support column portion 3, a pulley 62 attached to the pulley support portion 61, a first reel 63 and a second reel 64 provided at the base portion 2, a first wire 65 having one end 65a connected to the first reel 63 and wound around the pulley 62, a second wire 67 having one end 67a connected to the second reel 64, and a painting support portion 66 fixed to the other end 65b of the first wire 65 and the other end 67b of the second wire 67 respectively to support the painting portion 5. The pulley 62 is arranged such that its axis extends in the width direction in front of the support column 3.

[0022] The first wire 65 is wound around the pulley 62 from above, and the portion 65c wound around the pulley 62 is at the highest position, extending downward below the pulley 62 before and after the pulley 62. The first wire 65 extends downward behind the pulley 62 to the height of the base and then bends backward, and the end (one end 65a) on the side behind the pulley 62 is connected to the first reel 63. The first wire 65 extends downward in front of the pulley 62, and the end (the other end 65b) on the side in front of the pulley 62 is fixed to the painting support portion 66 from above.

[0023] The second wire 67 is fixed to the painting support portion 66 fixed to the first wire 65 from below. The end (the other end 67b) of the second wire 67 fixed to the painting support portion 66 is at the highest position, and the one end 67a side extends downward to the height of the base 2 and then bends backward, and the one end 67a is connected to the second reel 64.

[0024] When the first reel 63 pays out the first wire 65, the second reel 64 takes up the second wire 67, and the other end 65b of the first wire 65 and the other end 67b of the second wire 67 descend, the painting support portion 66 also descends. When the first reel 63 takes up the first wire 65, the second reel 64 pays out the second wire 67, and the other end 65b of the first wire 65 and the other end 67b of the second wire 67 rise and fall, the painting support portion 66 also rises.

[0025] As shown in FIGS. 4 and 5, the painting support portion 66 includes an upper plate portion 661, a lower plate portion 662, a painting fixing portion 663, a regulating portion 7, and a counterweight 664. The upper plate portion 661 and the lower plate portion 662 are each a long flat plate-shaped plate material, and the plate surfaces are horizontal and in the front-rear direction, and the upper plate portion 661 is arranged at an interval above the lower plate portion 662.

[0026] On the upper plate portion 661, a first wire 65 fixing portion 661a to which the other end 65b of the first wire 65 is fixed is provided at the front portion. On the lower plate portion 662, a second wire 67 fixing portion 662a to which the other end 67b of the second wire 67 is fixed is provided at the front portion. The first wire 65 fixing portion 661a and the second wire 67 fixing portion are arranged at positions overlapping in the vertical direction. In FIGS. 1, 2, and 4, the first wire 65 and the second wire 67 are continuous, but they do not have to be continuous. The portion provided between the first reel 63 and the painting support portion 66 is the first wire 65, and the portion provided between the second reel 64 and the painting support portion 66 is the second wire 67.

[0027] In the upper plate portion 661, a long hole portion 661b penetrating in the vertical direction is formed at a position behind the first wire 65 fixing portion 661a. In the lower plate portion 662, a long hole portion 662b penetrating in the vertical direction is formed at a position behind the second wire 67 fixing portion 662a. The long hole portions 661b and 662b extend in the front-rear direction, respectively. The long hole portion 661b of the upper plate portion 661 and the long hole portion 662b of the lower plate portion 662 are arranged at positions overlapping in the vertical direction. A portion behind the pulley 62 of the first wire 65 is inserted into the long hole portions 661b and 662b.

[0028] The restricting portion 7 has a cylindrical cylindrical portion 71 and a plurality of bag bodies 72 attached to the inner peripheral surface 71a of the cylindrical portion 71. The cylindrical portion 71 is arranged to extend in the vertical direction between the upper plate portion 661 and the lower plate portion 662. The cylindrical portion 71 is arranged at a position behind the long hole portions 661b and 662b. The upper end portion of the cylindrical portion 71 is joined to the upper plate portion 661, and the lower end portion is joined to the lower plate portion 662. In the upper plate portion 661 and the lower plate portion 662, round hole portions 661c and 662c having the same diameter as the cylindrical portion 71 are formed at positions overlapping the cylindrical portion 71. The inner diameters of the round hole portions 661c and 662c of the upper plate portion 661 and the lower plate portion 662 and the inner diameter of the cylindrical portion 71 are set to be larger than the outer diameter of the support portion 3. The support portion 3 is inserted into the cylindrical portion 71. In the present embodiment, the cylindrical portion 71 has a circular cylindrical shape, but is not limited thereto, and may have a rectangular cylindrical shape.

[0029] The bag body 72 is, for example, a rubber bag-shaped member into which air can be injected. The bag body 72 is elastically deformable, and when air is injected into it, its outer shape expands, and when the internal air is discharged, it contracts. The bag body 72 can repeat expansion and contraction by injecting and discharging air. The injection and discharge of air into the bag body 72 are performed, for example, by a compressor.

[0030] The painting fixing part 663 is joined to the front end parts of the upper plate part 661 and the lower plate part 662 respectively. The painting part 5 is fixed to the front side of the painting fixing part 663. That is, the painting part 5 is fixed to the front side of the painting support part 66. The counterweight 664 is joined to the rear end parts of the upper plate part 661 and the lower plate part 662 respectively. That is, the counterweight 664 is provided on the rear side of the painting support part 66. The weight of the counterweight 664 can be adjusted. For this reason, when the painting support part 66 tilts forward, the weight of the counterweight 664 is increased to correct the tilt of the painting support part 66, and when the painting support part 66 tilts backward, it is assumed that the weight of the counterweight 664 is reduced to correct the tilt of the painting support part 66.

[0031] As described above, in the painting support part 66, the support column part 3 is inserted into the cylindrical part 71, the part of the first wire 65 behind the pulley 62 is inserted into the long hole parts 661b, 662b, the other end 65b of the first wire 65 is fixed to the first wire 65 fixing part 661a, and the other end 67b of the second wire 67 is fixed to the second wire 67 fixing part 662a. The painting support part 66 is arranged between the base part 2 and the pulley 62. The cross-sectional shape of the first wire 65 is set to be smaller than the shape of the long hole parts 661b, 662b. For this reason, the first wire 65 can pass through the long hole parts 661b, 662b of the upper plate part 661 and the lower plate part 662 respectively. Even if the position of the first wire 65 passing through the long hole parts 661b, 662b deviates from that of the painting support part 66, it is possible to prevent the first wire 65 from contacting either or both of the upper plate part 661 and the lower plate part 662 within the range of the length dimension of the long hole parts 661b, 662b.

[0032] The support column portion 3 is disposed inside (on the central side of the cylindrical body) the bag body 72 attached to the inner peripheral surface 71a of the cylindrical portion 71. The cylindrical portion 71 and the support column portion 3 are relatively displaceable in the vertical direction in a state where the bag body 72 is contracted and does not press the support column portion 3, and the relative displacement in the vertical direction is restricted in a state where the bag body 72 is inflated and presses the support column portion 3. By preventing the bag body 72 from moving in the vertical direction with respect to the support column portion 3, the position of the painting support portion 66 is fixed.

[0033] When the painting support portion 66 is not fixed to the support column portion 3 and is in a state of being relatively movable in the vertical direction with respect to the support column portion 3, when the first reel 63 unwinds the first wire 65 and the second reel 64 winds up the second wire 67, it descends, and when the first reel 63 winds up the first wire 65 and the second reel 64 unwinds the second wire 67, it ascends. The restricting portion 7 can fix the painting support portion 66 at an arbitrary height by inflating the bag body 72 and fixing it to the support column portion 3 in a state where the painting support portion 66 is disposed at an arbitrary height. Thereby, the painting portion 5 supported by the painting support portion 66 can be fixed at an arbitrary height.

[0034] The painting method according to this embodiment will be described. First, the painting apparatus 1 is installed (painting apparatus installation step). The painting apparatus 1 is installed at a position facing the inner wall surface 11 to be painted in the front-rear direction. By extending the support column portion 3, the pressing portion 4 at the upper end is pressed against the upper ceiling 13. The painting apparatus 1 is placed in a state of being stretched between the floor portion 12 and the ceiling 13.

[0035] Subsequently, the first reel 63 and the second reel 64 are driven to unwind and wind up the first wire 65 and the second wire 67, and the painting support portion 66 is raised and lowered to be disposed at a predetermined height (lifting step). The bag body 72 of the restricting portion 7 is inflated to fix the position of the painting support portion 66. Thereby, the position of the painting portion 5 is fixed.

[0036] Subsequently, the painting unit 5 is driven to paint the inner wall surface 11 (painting process). At this time, when the painting direction adjustment mechanism and the position fine adjustment mechanism described above are provided in the painting unit 5, the painting direction of the spray gun 52 is adjusted and the position of the spray gun 52 is finely adjusted to paint the inner wall surface 11. When the painting at a predetermined height is completed, the air in the bag body 72 of the restricting unit 7 is exhausted to release the fixation between the painting support portion 66 and the support column portion 3, the painting support portion 66 is moved up and down to change the height of the painting unit 5, and painting is performed at that height. Further, when painting is performed by moving the painting unit 5 in the width direction, the support column portion 3 is contracted, the painting apparatus 1 is moved in the width direction, the support column portion 3 is extended again so that the painting apparatus 1 is stretched between the floor portion 12 and the ceiling 13, and then painting is performed at a predetermined height.

[0037] Next, the operation and effects of the painting apparatus 1 and the painting method according to the present embodiment will be described. In the painting apparatus 1 and the painting method according to the present embodiment, by extending the support column portion 3, the pressing portion 4 is pressed against the ceiling 13, and by installing the painting apparatus 1 in a stretched state between the floor portion 12 and the ceiling 13, the painting apparatus 1 can be fixed between the floor portion 12 and the ceiling 13. Since the painting unit 5 for performing painting in this state can be moved up and down, the inner wall surface 11 can be painted by moving the painting unit 5 from the height of the floor portion 12 to the height of the ceiling 13. As a result, painting of the high place of the inner wall surface 11 can be performed without providing a temporary scaffold. As a result, even when the inner wall surface 11 is the inner wall surface 11 of a narrow portion or there is an interfering object near the inner wall surface 11 and it is difficult to install a temporary scaffold, the inner wall surface 11 can be painted. Further, the cost and construction period required for installing the temporary scaffold can be reduced.

[0038] In addition, in the coating device 1 according to the present embodiment, the elevating unit 6 includes a pulley 62 provided at the upper end 3a of the column portion 3, a first reel 63 and a second reel 64 provided at the base portion 2, a first wire 65 having one end 65a connected to the first reel 63 and wound around the pulley 62, a second wire 67 having one end 67a connected to the second reel 64, and a coating support portion 66 that supports the coating portion 5 fixed to the other end 65b of the first wire 65 and the other end 67b of the second wire 67. Then, the coating support portion 66 moves up and down by unwinding and winding the first wire 65 and the second wire 67. By doing so, it is possible to move the coating support portion 66 that supports the coating portion 5 up and down with a simple structure, and it is also possible to move the coating portion 5 up and down even when the height of the column portion 3 is different.

[0039] In addition, in the coating device 1 according to the present embodiment, the coating support portion 66 has a restricting portion 7 that can be fixed to the column portion 3. The restricting portion 7 includes a cylindrical portion 71 through which the column portion 3 is inserted so as to be relatively movable in the vertical direction, and a bag body 72 attached to the inner peripheral surface 71a of the cylindrical portion 71 and inflated when air is injected. When the bag body 72 expands and contacts the outer peripheral surface of the column portion 3, the relative movement in the vertical direction between the column portion 3 is restricted. With such a configuration, the coating portion 5 can be fixed at a desired height.

[0040] As described above, the embodiments of the coating device and the coating method according to the present invention have been described. However, the present invention is not limited to the above embodiments, and can be appropriately changed without departing from the spirit thereof. For example, in the above embodiment, waterproof coating is performed on the inner side (inner wall surface 11) of the outer wall of the basement floor of the reactor building of the power plant. However, as long as the location where the waterproof coating is performed is provided between the floor portion 12 and the ceiling 13 where the coating device 1 can be installed, it may be other than the above. Also, if there is a floor portion where the coating device 1 can be installed and a ceiling that can press against the upper end 3a of the column portion 3, the location where the waterproof coating is performed may be provided outdoors.

[0041] In the above-described embodiment, the elevating unit 6 for elevating the painting unit 5 is configured to use the first wire 65 and the second wire 67 that are elevated by unwinding and winding the first reel 63 and the second reel 64. However, the configuration of the elevating unit 6 may be other than the above. Also, the configuration in which the painting support unit 66 that supports the painting unit 5 is fixed to the support column 3 may be other than the above. The painting support unit 66 does not necessarily have to be fixed to the support column 3.

Explanation of Signs

[0042] 1 Painting apparatus 2 Base 3 Support column 3a Upper end 4 Pressing part 5 Painting unit 6 Elevating unit 7 Regulation unit 11 Inner wall surface (inside of structure) 12 Floor 13 Ceiling 62 Pulley 63 First reel (reel) 64 Second reel (reel) 65 First wire (wire) 65a One end 65b The other end 66 Painting support unit 67 Second wire (wire) 67a One end 67b The other end 71 Cylindrical part 71a Inner peripheral surface 72 Bag body

Claims

1. In a painting apparatus for painting the interior of a structure, a base installed on the floor of the structure, a support column provided on the base and capable of expanding and contracting in the vertical direction, a pressing portion provided at the upper end of the support column, which is pressed against the ceiling when the support column is extended toward the ceiling of the structure, a painting portion that moves up and down along the support column and paints the interior of the structure at a predetermined height, and a lifting portion for lifting and lowering the painting portion, wherein the lifting portion includes a pulley provided at the upper end of the support column, a reel provided on the base, a wire having one end connected to the reel, wound around the pulley, and wound out and wound up by the reel, and a painting support portion fixed to the other end of the wire and supporting the painting portion, which moves up and down by the winding out and winding up of the wire, the painting support portion having a restricting portion for restricting movement on the support column, the restricting portion including a cylindrical portion into which the support column is inserted so as to be relatively movable in the vertical direction, and a bag body attached to the inner peripheral surface of the cylindrical portion and inflated when air is injected, the bag body restricting relative vertical movement with the support column when inflated and contacting the outer peripheral surface of the support column. A painting apparatus.

2. In a painting method for painting the interior of the structure using the painting apparatus according to Claim 1, a painting apparatus installation step of pressing the pressing portion against the ceiling by extending the support column and installing the painting apparatus in a taut state between the floor and the ceiling; a lifting step of lifting and lowering the painting portion and arranging it at a predetermined height; and a painting step of painting the interior of the structure with the painting portion arranged at the predetermined height. A painting method.

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