JP7645143B2 - Spraying work booth - Google Patents

Description

The present invention relates to a spray booth.

The following Patent Document 1 describes a device for preventing mist from scattering that enables spraying of a urethane waterproofing material or other such material without the mist adhering to objects or the like that are in the vicinity of the spray area.

In this mist dispersion prevention device, the spray nozzle is inserted into the box-shaped case through an opening for spray operation provided in the ceiling. The ceiling is also provided with a ventilation fan and filter to remove the mist generated inside the box-shaped case and release it into the atmosphere.

JP 2005-144218 A

In the mist dispersion prevention device of Patent Document 1, the spray operation opening is open to the outside of the box-shaped case, so there is a risk that the mist will be released into the atmosphere from the spray operation opening. In addition, there is a risk that the ventilation fan will suck in the air introduced into the box-shaped case from the spray operation opening, making it impossible to efficiently remove the mist inside the box-shaped case.

In consideration of the above, the present invention aims to provide a spray booth that can efficiently remove mist from within the booth and prevent the mist from leaking into the atmosphere.

The spraying work booth of claim 1 comprises a pipe house constructed by covering the upper surface and end surfaces in the beam direction of a three-dimensional frame composed of pipe-made pillars, beams, and girders with sheet material; an air supply plate provided at an opening on one end surface of the pipe house in the girder direction and equipped with an air supply fan that introduces outside air into the pipe house; a breathable sheet attached to the air supply plate and closing the opening on the one end surface; an exhaust box provided at an opening on the other end surface of the pipe house in the girder direction and equipped with an intake port that draws in air from inside the pipe house, an exhaust fan that exhausts the air taken in from the intake port, and a filter that filters the air; and a non-breathable sheet attached to the exhaust box and closing the opening on the other end surface.

In the spraying work booth of claim 1, the top surface and the end surface in the inter-beam direction of the pipe house are covered with sheet material. In addition, the opening on one end surface in the girder direction of the pipe house is closed with an air supply plate and a breathable sheet, and the opening on the other end surface in the girder direction of the pipe house is closed with an exhaust box and a non-breathable sheet.

The spray booth is equipped with an air supply fan and an exhaust fan. These fans create an air flow from the air supply plate to the exhaust box, and the air in the booth is filtered by a filter in the exhaust box before being exhausted to the outside.

Therefore, even if mist is generated when a spraying work booth is set up to cover the surface to be sprayed and spraying work is carried out, this mist is removed from within the spraying work booth, and the working environment within the spraying work booth is unlikely to deteriorate. In addition, since the mist is filtered, it is unlikely to leak into the atmosphere and is unlikely to deteriorate the surrounding environment.

Furthermore, the opening on the air supply plate side is closed with a breathable sheet, and outside air is also introduced into the pipe house through the breathable sheet. Therefore, even if the intake air volume of the intake air fan is small compared to the exhaust volume of the exhaust fan, the intake air can be supplemented and an airflow can be generated. This makes it possible to efficiently remove mist from inside the spraying booth.

The spray booth of claim 2 is the spray booth of claim 1, in which the legs of the three-dimensional frame are provided with anti-slip rubber or a locking member that can be locked to a building.

In the spraying booth of claim 2, the legs of the three-dimensional frame are provided with anti-slip rubber or a locking member that can be locked to a building. If the legs of the three-dimensional frame are provided with anti-slip rubber, the three-dimensional frame can be installed on a sloped surface such as a roof. Also, if the legs of the three-dimensional frame are provided with a locking member that can be locked to a building, the three-dimensional frame can be installed on a balcony or outdoor corridor handrail, for example.

The spray booth of claim 3 is the spray booth of claim 1 or 2, in which at least one of the air supply fan and the exhaust fan is driven by a power supply facility equipped with at least one of a storage battery and a solar panel supported by the three-dimensional frame.

In the spray booth of claim 3, at least one of the air supply fan and the exhaust fan is driven by power supplied from at least one of a storage battery and a solar panel supported by a three-dimensional frame. This eliminates the need to use a power source from the building, etc. This means that there are fewer restrictions on where the spray booth can be installed.

The spraying booth of claim 4 is the spraying booth of claim 3, in which the length of the pipe house in the girder direction is 5000 mm or more, and the total weight of the pipe house, the air supply plate, the air supply fan, the breathable sheet, the exhaust fan, the filter, the exhaust box, the non-breathable sheet, and the power supply equipment is 30 kg or less.

In the spraying work booth of claim 4, the length of the pipe house in the girder direction is set to 5000 mm or more. Therefore, spraying work can be carried out over an area with a width of about 5000 mm without moving the pipe house.

In addition, the total weight of the spray booth is set at 30 kg or less. This means that the entire spray booth can be carried manually by around two workers.

The spray booth of the present invention can efficiently remove mist from within the booth and prevent the mist from leaking into the atmosphere.

FIG. 1 is a perspective view showing a spraying work booth according to an embodiment and the roof of a building on which the spraying work booth is installed. FIG. 2A is a front view showing a pipe house of a spraying work booth according to an embodiment of the present invention, and FIG. 2B is a side view. FIG. 2A is a perspective view showing an example of a joint member according to an embodiment, FIG. 2B is a perspective view showing another example, and FIG. 2C is a perspective view showing yet another example. 1A is a perspective view showing an anti-slip rubber provided on a leg of a pillar according to an embodiment, and FIG. 1B is a perspective view showing a locking member. 1A is a cross-sectional view showing an air supply plate according to an embodiment, and FIG. 1B is a view taken along line BB in FIG. 1A is a cross-sectional view showing an exhaust box according to an embodiment of the present invention, and FIG. 1B is a view taken along line BB in FIG. FIG. 2 is a top view showing the power supply facility according to the embodiment. FIG. 1A is a cross-sectional view showing an example of a spraying work booth according to an embodiment installed on a balcony, and FIG. 1B is a partially enlarged cross-sectional view showing a modified example in which the pillar material is placed on the outside of the handrail. FIG. 1A is a perspective view showing a square pipe, which is a modified example of the material for forming the three-dimensional frame, and FIG. 1B is a perspective view showing a plunger that connects the square pipes together.

The spray booth according to an embodiment of the present invention will be described below with reference to the drawings. Components indicated with the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and there may be multiple components.

In addition, explanations of configurations and symbols that are duplicated in each drawing may be omitted. Note that the present invention is not limited to the following embodiments, and may be implemented with appropriate modifications, such as omitting configurations or replacing them with different configurations, within the scope of the purpose of the present invention.

In each figure, the directions indicated by the arrows X and Y are directions along a horizontal plane and are perpendicular to each other. The direction indicated by the arrow Z is a direction along the vertical direction (up and down direction). The directions indicated by the arrows X, Y, and Z in each figure are assumed to be consistent with each other.

<Spraying work booth>
FIG. 1 shows a spray booth 20 (hereinafter referred to as “booth 20 ”) according to an embodiment of the present invention, together with a building 10 .

The building 10 is spanned by a roof 12 that slopes from the ridge (not shown) to the eaves. If the girder direction of the building 10 is the X direction and the beam direction is the Y direction, the roof 12 slopes diagonally downward along the Y direction from the ridge to the eaves. In addition, the roof 12 has a groove 14 formed along the X direction.

The booth 20 is a portable anti-scattering chamber that is installed to cover the upper part of the groove 14 when forming a waterproof coating on the groove wall of the groove 14, for example, by spraying with a spray gun. The booth 20 is used to prevent the mist of paint (hereinafter referred to as "mist") sprayed onto the groove 14 from leaking into the atmosphere outside the booth 20.

The booth 20 is formed with a pipe house 30, an air supply plate 40, and an exhaust box 50.

(Pipe house)
The pipe house 30 is configured to include a sheet material 32 and a three-dimensional frame 34. The three-dimensional frame 34 is a prefabricated structure that forms the framework of the booth 20, and is formed to include pillars 34A, 34B, beams 34C, and girders 34D and 34E. The pillars 34A, 34B, beams 34C, and girders 34D, 34E are formed using aluminum round pipes with a diameter of about 19 mm.

In the following explanation, the direction along which the axial direction of beam 34C in the pipe house 30 runs may be referred to as the inter-beam direction of the booth 20 and the pipe house 30, and the direction along which the axial direction of beams 34D and 34E runs may be referred to as the longitudinal direction of the booth 20 and the pipe house 30.

The pipe house 30 is installed on the roof 12 so that its span direction and girder length direction approximately coincide with the girder length direction (X direction) and span direction (Y direction) of the building 10. In other words, the pipe house 30 is installed on the roof 12 so that its girder length direction approximately coincides with the extension direction of the grooves 14 formed in the roof 12.

(Sheet material for pipe houses)
The sheet material 32 is a breathable sheet that covers the upper surface of the three-dimensional frame 34 and the end surfaces of the three-dimensional frame 34 in the inter-beam direction. The "upper surface of the three-dimensional frame 34" and the "end surfaces of the three-dimensional frame 34 in the inter-beam direction" will be described in detail later. The sheet material 32 is fixed to the pillar members 34A, 34B, the beam members 34C, and the girder members 34D, 34E using cable ties or the like.

As an example of the breathable sheet that constitutes the sheet material 32, a mesh sheet with two layers of openings with an opening size of about 1 mm is used. A two-layer mesh sheet ensures breathability, but does not allow mist to pass through easily.

When the pipe house 30 is installed on the roof 12, the lower end 32A of the sheet material 32 on the side of the pillar material 34B is positioned lower than the lower end of the pillar material 34B. In addition, a weight 32B is fixed to this lower end 32A. This prevents the sheet material 32 from being blown up by the wind.

(Pipe house three-dimensional frame 34)
2A and 2B show the three-dimensional frame 34 in a state in which the sheet material 32 is not fixed. As shown in Fig. 2B, the upper end of the pillar material 34A and the upper end of the pillar material 34B are connected by the beam material 34C. As a result, a gate-shaped frame 36 is formed by the pillar materials 34A, 34B and the beam material 34C.

The length of pillar 34A is shorter than the length of pillar 34B. Therefore, by placing pillar 34A on the ridge side of roof 12 and placing pillar 34B on the eaves side of roof 12, beam 34C is positioned along the Y direction and approximately horizontally. Also, frame 36 is positioned along the Y direction.

As shown in FIG. 2(A), four frames 36 are arranged at a predetermined interval in the X direction. The number of frames 36 can be changed as appropriate depending on the desired size of the booth 20, but at least two are required.

Beams 34D and 34E are respectively provided between adjacent frames 36. Specifically, the upper ends of adjacent pillars 34B in the X direction are connected by beams 34D. In addition, the remaining portions of adjacent pillars 34B in the X direction other than the upper ends are connected by beams 34E.

Here, "portion other than the upper end of pillar 34B" refers to, for example, the center of pillar 34B. It also refers to, for example, the lower end of pillar 34B (in this embodiment). By connecting the upper ends and portions other than the upper ends of adjacent pillars 34B with beams 34D and 34E, respectively, a closed rectangular frame (frame along the vertical plane) is formed by the two pillars 34B and beams 34D and 34E, and rigidity along the vertical plane of three-dimensional frame 34 is ensured.

As shown in FIG. 1, the upper ends of the pillars 34A adjacent to each other in the X direction are also connected by beams 34D. And, the portions other than the upper ends of the pillars 34A adjacent to each other in the X direction are also connected by beams 34E.

The upper ends of adjacent pillars 34A are connected to the remaining portions by beams 34D and 34E, respectively, to form a closed rectangular frame (a frame along a vertical plane) using two pillars 34A and beams 34D and 34E.

The "beam-direction end face of the three-dimensional frame 34" mentioned above refers to the surface formed in the area sandwiched between two pillars 34B arranged at the "end" in the X direction. This end face also includes the surface formed in the area sandwiched between two pillars 34A arranged at the "end" in the X direction.

Furthermore, as described above, beam 34C is connected to the upper end of column 34A. Similarly, beam 34C is connected to the upper end of column 34B. Therefore, both ends of adjacent beams 34C in the X direction are also connected by girder 34D.

As a result, a closed rectangular frame (a frame along the horizontal plane) is formed by two beams 34C and two girders 34D, ensuring the rigidity of the three-dimensional frame 34 along the horizontal plane.

The "top surface of the three-dimensional frame 34" mentioned above refers to the surface formed in the area sandwiched between two beams 34C arranged at the "endmost" positions in the X-direction.

(3D frame joint)
In the three-dimensional frame 34, joint members are used at the connecting portions where the pillars 34A, 34B, the beams 34C, and the girder members 34D and 34E are connected to each other.

The joint member J1 shown in FIG. 3(A) is a joint that connects three members arranged along three mutually intersecting directions. As an example, the joint member J1 is used to connect a column member 34B, a beam member 34C, and a girder member 34D.

The joint member J2 shown in FIG. 3(B) is a joint that connects four or three members arranged along three mutually intersecting directions. As an example, the joint member J2 is used to connect a column member 34B, a beam member 34C, and two girder members 34D. Note that the girder members 34D may be replaced with a single member that serves as a through member inside the joint member J2.

The joint member J3 shown in FIG. 3(C) is a joint that connects three or four members arranged along two intersecting directions. As an example, the joint member J3 is used to connect a pillar member 34B and two beam members 34E that are used as a through member inside the joint member J3. Note that the pillar member 34B may be replaced with two separate members inside the joint member J3.

(Legs of the three-dimensional frame)
In the three-dimensional frame 34, anti-slip rubber 60 is provided on the legs, i.e., the lower ends, of the pillars 34A, as shown in Fig. 4(A). The anti-slip rubber 60 is formed in a bag shape and covers the lower ends of the pillars 34A. The anti-slip rubber 60 is made of rubber with a higher friction coefficient than surfaces such as metal. This prevents the three-dimensional frame 34 from slipping off the inclined surface even if the pillars 34A are installed on the inclined surface.

In addition to the anti-slip rubber 60, a locking member 62 is provided on the leg portion, i.e., the lower end portion, of the pillar material 34B, as shown in FIG. 4(B). The locking member 62 includes a fixed portion 62A fixed to the pillar material 34B, an arm portion 62B fixed to the fixed portion 62A and extending substantially horizontally from the fixed portion 62A, and a locking portion 62C fixed to the arm portion 62B.

The fixing portion 62A can be fixed to any position in the vertical direction of the pillar material 34B. The locking portion 62C is an angle member with a flange 62CF that protrudes downward. The horizontal distance H between the locking portion 62C and the fixing portion 62A (i.e., the horizontal distance from the pillar material 34B) can be changed as appropriate in various ways, such as by changing the length of the arm portion 62B or by changing the fixed position of the locking portion 62C relative to the arm portion 62B.

When the three-dimensional frame 34 is installed on the roof 12, the locking portion 62C is locked to the open end of the groove 14, as shown in FIG. 2(B). This prevents the three-dimensional frame 34 from sliding downward.

In addition, the position of the pillar 34B relative to the groove 14 can be adjusted by adjusting the horizontal distance H between the engaging portion 62C and the pillar 34B. This allows the Y-direction dimension of the work space in the booth 20 to be adjusted. For example, by increasing the horizontal distance H and positioning the pillar 34B away from the groove 14, the degree of freedom in the position of tools such as spray guns used in spraying work can be increased.

(Air supply plate)
1, an air supply plate 40 is provided at an opening on one end face in the girder direction of the pipe house 30. The "opening" refers to a surface in the space surrounded by the three-dimensional frame 34 and the building 10 that is not surrounded by the sheet material 32 or the building 10, i.e., a surface that is open to the outside air.

The air supply plate 40 is a plate material made of aluminum or resin. From the viewpoint of reducing weight, the air supply plate 40 may also be made of a sheet material such as a PVC sheet or rubber.

As shown in Figures 5(A) and (B), the air supply plate 40 is arranged along the columns 34A and 34B installed at one end of the three-dimensional frame 34 in the girder direction, and is fixed to the columns 34A and 34B.

The air supply plate 40 has multiple through holes, and an air supply fan 42 is attached to each of the through holes. The air supply fan 42 is a blower that introduces outside air into the pipe house 30, as shown by the arrow A1 in Figure 5 (A).

In this embodiment, two intake air fans 42 are provided, but the number of intake air fans 42 can be increased or decreased as appropriate depending on the air blowing capacity of the intake air fans 42. Also, the number can be increased or decreased as appropriate depending on the required amount of intake air.

A breathable sheet 44 is removably attached to the lower end of the air supply plate 40 using hook-and-loop fasteners or the like. The breathable sheet 44 is formed by stacking two mesh sheets with openings of approximately 1 mm in size, similar to the sheet material 32 described above.

The breathable sheet 44 is a curtain that closes the opening at one end of the pipe house 30 in the girder direction. The breathable sheet 44 is long enough to reach the bottom 14A of the groove 14 when the pipe house 30 is installed on the roof 12 (see Figure 2 (B)).

The air supply plate of the present invention may be formed with a width smaller than that of the air supply plate 40 shown in FIG. 5(B). In this case, the air supply plate is fixed to the beam material 34C. The gap between the air supply plate and the pillar material 34A and the gap between the air supply plate and the pillar material 34B are filled with a breathable sheet 44.

By driving the exhaust fan 56 (see FIG. 6) described later, outside air is introduced into the pipe house 30 through the breathable sheet 44, as shown by the arrow A2 in FIG. 5(A).

However, there are cases where outside air is not introduced into the pipe house 30 through the breathable sheet 44, such as when the exhaust volume per unit time of the exhaust fan 56 is equal to or less than the intake volume per unit time of the intake fan 42.

(Exhaust box)
1, an exhaust box 50 is provided at an opening in the other end face in the girder direction of the pipe house 30 (the end face opposite to the end face on which the air supply plate 40 is provided). The exhaust box 50 is a triangular prism-shaped box made of aluminum or resin.

As shown in Figures 6(A) and (B), the exhaust box 50 is disposed along the columns 34A and 34B installed at the other end of the three-dimensional frame 34 in the girder direction, and is fixed to the columns 34A and 34B.

The exhaust box 50 includes a main body 52 and an openable/closable lid 54 having an intake port 54A for drawing in air from inside the booth 20. An exhaust fan 56 and a filter 58 are arranged inside the main body 52.

The main body 52 is a hollow triangular prism with one side open, and is formed by two bottom members 52A, 52B and two side members 52C, 52D. The side members 52C, 52D are arranged so as to be substantially perpendicular to each other.

Of these, the side member 52C is fixed to the pillar members 34A and 34B of the three-dimensional frame 34. A through hole (not shown) is formed in the side member 52C. Furthermore, an exhaust fan 56 and a filter 58 that move air through this through hole are fixed to the side member 52C.

The opening/closing lid 54 forms one side of the triangular prism. The opening/closing lid 54 has a plurality of through holes, i.e., suction ports 54A. The suction ports 54A are vents that take in air from inside the pipe house 30 (in other words, inside the booth 20) into the exhaust box 50. The opening/closing lid 54 is rotatably fixed to the lower end of the side member 52C, and can be opened and closed as appropriate.

The exhaust fan 56 is a blower that exhausts the air taken into the exhaust box 50 further outside the pipe house 30 (in other words, outside the booth 20).

A filter 58 is provided inside the exhaust fan 56. The filter 58 is a member that filters the air taken into the exhaust box 50.

A non-breathable sheet 59 is removably attached to the lower end of the side member 52C using hook-and-loop fasteners or the like. The non-breathable sheet 59 is made of rubber.

The non-breathable sheet 59 is a curtain that closes the opening at the other end face in the girder direction of the pipe house 30 described above. The non-breathable sheet 59 is long enough to reach the bottom 14A of the groove 14 when the pipe house 30 is installed on the roof 12 (see Figure 2 (B)).

The opening on one or the other end face of the pipe house 30 in the girder direction also serves as an entrance to the pipe house 30. When entering or exiting, the breathable sheet 44 or non-breathable sheet 59 is removed, or the bottom part is lifted up while still installed.

The exhaust box of the present invention may be formed with a width smaller than that of exhaust box 50 shown in FIG. 6(B). In this case, the exhaust box is fixed to beam material 34C. Furthermore, the gap between the exhaust box and pillar material 34A and the gap between the exhaust box and pillar material 34B are blocked with non-breathable sheet 59.

When the exhaust fan 56 is driven, the air inside the pipe house 30 is drawn into the exhaust box 50 through the suction port 54A, as shown by the arrow A3 in Figures 6 (A) and (B). At this time, some of the mist released when spraying work is carried out inside the pipe house 30 is drawn into the exhaust box 50 together with the air, and the rest adheres to the surface of the opening and closing lid 54.

The air taken into the exhaust box 50 is then introduced into the exhaust fan 56 via the filter 58, as shown by the arrow A4 in FIG. 6(B). At this time, mist is captured by the filter 58. The air that has passed through the filter 58 is then exhausted outside the pipe house 30, as shown by the arrow A5 in FIG. 6(A).

It is preferable to place the filter 58 inside the exhaust fan 56, in front of the rotor blades (not on the outside air side, but on the inside side of the pipe house 30). This can prevent the motor of the exhaust fan 56 from deteriorating due to mist. The filter 58 may also be provided on the back side of the opening and closing lid 54, for example.

(Electricity supply equipment)
Although not shown in Fig. 1, the booth 20 further includes a power supply facility 70 shown in Fig. 7. The power supply facility 70 includes an installation stand 72, a solar panel 74, and a storage battery 76.

The installation base 72 is a plate material made of aluminum or resin, and is fixed above the pipe house 30 at one end in the longitudinal direction of the pipe house 30 and supported by the three-dimensional frame 34. The solar panel 74 and the storage battery 76 are fixed to the installation base 72 and connected to each other by conductive cables. This allows the electricity generated by the solar panel 74 to be stored in the storage battery 76. The storage battery 76 can also store electricity supplied from a power source (not shown).

The power stored in the storage battery 76 drives the exhaust fan 56 (see FIG. 6) via a conductive cable. The storage battery 76 and the air supply fan 42 may also be connected by a conductive cable, and the air supply fan 42 (see FIG. 5) may be driven by the power supplied from the storage battery 76.

(Booth weight)
In this embodiment, the length of the beams 34D and 34E forming the three-dimensional frame 34 is approximately 1800 mm, the length of the beam 34C is approximately 1000 mm, and the length of the pillars 34B is approximately 1120 mm. Therefore, the external dimensions of the booth 20 are approximately 5400 mm in width, approximately 1000 mm in depth, and approximately 1120 mm in height.

The total weight of the pipe house 30 (sheet material 32 and three-dimensional frame 34), air supply plate 40 (including air supply fan 42), breathable sheet 44, exhaust box 50 (including exhaust fan 56 and filter 58), non-breathable sheet 59 and power supply equipment 70 is set to 30 kg or less. Furthermore, it is preferable that the weight including the non-slip rubber 60 and the locking member 62 in addition to this total weight is also set to 30 kg or less.

<Action and Effects>
1, in the booth 20 according to the embodiment of the present invention, the upper surface and the end surface in the span direction (Y direction) of the pipe house 30 are covered with a sheet material 32. Also, an opening on one end surface in the girder direction of the pipe house 30 is closed by an air supply plate 40 and an air-permeable sheet 44, and an opening on the other end surface in the girder direction of the pipe house 30 is closed by an exhaust box 50 and an air-impermeable sheet 59.

The booth 20 is provided with an air supply fan 42 (see FIG. 5) and an exhaust fan 56 (see FIG. 6). The air supply fan 42 and the exhaust fan 56 create an airflow from the air supply plate 40 toward the exhaust box 50, and the air inside the booth 20 is filtered by a filter 58 (see FIG. 6(B)) provided in the exhaust box 50 and exhausted to the outside.

For this reason, even if mist is generated when spraying work is performed by installing the booth 20 so that it covers the groove 14, which is the surface to be sprayed, the mist is removed from within the booth 20 and the working environment within the booth 20 is unlikely to deteriorate. In addition, the mist is filtered by the filter 58, so it is unlikely to leak into the atmosphere and is unlikely to deteriorate the surrounding environment.

Furthermore, the opening on the air supply plate 40 side is closed with a breathable sheet 44, and outside air is also introduced into the pipe house 30 through the breathable sheet 44. Therefore, even if the suction volume of the air supply fan 42 is small compared to the exhaust volume of the exhaust fan 56, the air supply can be supplemented and an airflow can be generated. This allows the mist in the booth 20 to be efficiently removed.

As shown in FIG. 4, in the booth 20, anti-slip rubber 60 is provided on the legs of the pillars 34A and 34B of the three-dimensional frame 34. Furthermore, a locking member 62 that is locked to the building 10 (the open end of the groove 14) is provided on the leg of the pillar 34B.

The provision of anti-slip rubber 60 on the legs of the three-dimensional frame 34 prevents the three-dimensional frame 34 from sliding downward when the three-dimensional frame 34 is installed on a sloping surface such as a roof 12 as shown in FIG. 1. In addition, the provision of a locking member 62 on the legs of the three-dimensional frame 34 further prevents the three-dimensional frame 34 from sliding downward.

In addition, in the booth 20, the exhaust fan 56 shown in FIG. 6 is driven by power supplied from a storage battery 76 supported by the three-dimensional frame 34. Power is supplied to the storage battery 76 from a solar panel 74. This means that there is no need to use a power source such as the building 10. As a result, the booth 20 is not affected by the length of the power lines when moving, and there are few restrictions on where the booth 20 can be installed.

The storage battery 76 can also supply power to the air supply fan 42 as well as the exhaust fan 56. A storage battery other than the storage battery 76 may be used to supply power to the air supply fan 42, but by using the storage battery 76, the booth 20 can be made lighter.

The storage battery 76 may be omitted from the power supply facility 70. In this case, the power generated by the solar panel 74 may be directly transmitted to the exhaust fan 56. The solar panel 74 may also be omitted. In this case, the storage battery 76 may store the power obtained from a power source such as the building 10.

Furthermore, the power supply equipment 70 itself may be omitted. If the power supply equipment 70 is omitted, power is supplied from the building 10, but if the length of the power line is sufficiently secured, the booth 20 can be moved without changing the position of the power source.

In addition, in the booth 20, the length of the pipe house 30 in the girder direction is 5000 mm or more (approximately 5400 mm). This allows spraying work to be done over an area with a width of approximately 5000 mm without moving the pipe house 30.

The total weight of the pipe house 30 (sheet material 32 and three-dimensional frame 34), air supply plate 40 (including air supply fan 42), breathable sheet 44, exhaust box 50 (including exhaust fan 56 and filter 58), non-breathable sheet 59, and power supply equipment 70 is set to 30 kg or less. Therefore, the entire spraying booth can be carried manually by about two workers.

<Other embodiments>
In the above embodiment, the booth 20 is installed so as to cover an upper portion of the groove 14 formed in the roof 12 installed on the building 10, but the embodiment of the present invention is not limited to this.

For example, the spraying booth 80 (hereinafter referred to as "booth 80") shown in Figure 8 (A) can be installed in various locations, such as the balcony 16 of a building, according to the present invention.

In the booth 80, for example, a column 34B, which is longer than the column 34A, is placed on the slab 16A of the balcony 16, and the shorter column 34A is placed on the upper end of the handrail 16B. It is preferable to provide a locking member 62 on the foot of the column 34A to prevent it from falling. The length of the columns 34A and 34B can be adjusted as appropriate according to the distance between the upper and lower slabs 16A and the height of the handrail 16B.

Although not shown in the figures, the booth 80, like the booth 20, is equipped with an air supply plate 40, an air supply fan 42, a breathable sheet 44, an exhaust box 50, an exhaust fan 56, a filter 58, a non-breathable sheet 59, and a power supply facility 70. The configuration of the booth 80 in the row direction (X direction) is also the same as that of the booth 20, and a description thereof will be omitted.

As shown in FIG. 8B, the pillar 34A may be positioned outside the handrail 16B with the locking portion 62C of the locking member 62 locked to the handrail 16B. The load of the booth 80 is supported by the handrail 16B via the locking member 62.

In addition, in the above embodiment, the pillars 34A, 34B, the beams 34C, and the girders 34D, 34E are made of round pipes, but the embodiment of the present invention is not limited to this. For example, instead of the round pipes, square pipes 90 as shown in FIG. 9(A) may be used.

The square pipes 90 may be connected to each other using an insert-type joint material such as the joint members J1 to J3 shown in FIG. 3, or may be connected to each other using a plunger 92 as shown in FIG. 9 (B).

The plunger 92 is a protrusion that protrudes from the side of the end of the square pipe 90A, and is biased in a direction out of the plane of the side by a biasing means such as a spring (not shown).

An angle bar 94 is fixed to the end of the square pipe 90B that is connected to the square pipe 90A. The angle bar 94 has a flange 94B that is perpendicular to the flange 94A fixed to the square pipe 90B, and is arranged with a gap V1 between the flange 94B and the end face of the square pipe 90B. Furthermore, a through hole 94C whose inner diameter is approximately the same as the outer diameter of the plunger 92 is formed in the flange 94B.

The tip of the square pipe 90A is inserted into the gap V1 to connect to the square pipe 90B. At this time, the square pipe 90A is inserted while pushing the plunger 92 with a finger or the like. When the plunger 92 is positioned so that it overlaps with the through hole 94C, the plunger 92 is inserted into the through hole 94C by the biasing force of the biasing means. This connects the square pipes 90A and 90B.

Although booths 20 and 80 use two types of pillars 34A and 34B with different lengths, the embodiment of the present invention is not limited to this. For example, when spraying the top surface of a flat roof on a building, the pillars may be of one length.

The spray booth of the present invention can also be used indoors, regardless of whether it is used outdoors, such as on a roof or balcony. By using the spray booth indoors, it is possible to prevent the mist from scattering outside the work area.

In addition, in the above embodiment, at least one of the anti-slip rubber 60 and the locking member 62 is disposed on the legs of the pillars 34A and 34B, but the embodiment of the present invention is not limited to this. For example, if the spraying booth is installed in a location that is not easily slippery, it is not necessarily necessary to use the anti-slip rubber 60 or the locking member 62.

In addition, when installing pillar material 34A on the floor finishing surface of the indoor space of building 10, sponges to prevent scratches may be attached to the legs. In this way, the present invention can be implemented in various ways.

20 Spraying work booth 30 Pipe house 32 Sheet material 34 Three-dimensional frame 34A Pillar material 34B Pillar material 34C Beam material 34D Girder material 40 Air supply plate 42 Air supply fan 44 Breathable sheet 50 Exhaust box 56 Exhaust fan 58 Filter 59 Non-breathable sheet 60 Anti-slip rubber 62 Locking member 70 Power supply equipment 74 Solar panel 76 Storage battery 80 Spraying work booth

Claims (4)

a pipe house constructed by covering the upper surface and the end surface of a three-dimensional frame formed of pipe-made pillars, beams, and girders with a sheet material;
An air supply plate provided at an opening on one end surface in the girder direction of the pipe house and equipped with an air supply fan that introduces outside air into the pipe house;
an air permeable sheet attached to the air supply plate and closing the opening on the one end surface;
an exhaust box provided at an opening on the other end surface in the girder direction of the pipe house, the exhaust box including an intake port for sucking in air from inside the pipe house, an exhaust fan for exhausting the air taken in from the intake port, and a filter for filtering the air;
a non-breathable sheet attached to the exhaust box and closing the opening on the other end surface;
A spraying work booth having: The spray booth according to claim 1, wherein the legs of the three-dimensional frame are provided with anti-slip rubber or a locking member that can be locked to a building. The spray booth according to claim 1 or 2, wherein at least one of the air supply fan and the exhaust fan is driven by a power supply facility equipped with at least one of a storage battery and a solar panel supported by the three-dimensional frame. The length of the pipe house in the girder direction is 5000 mm or more,
4. The spraying work booth according to claim 3, wherein a total weight of the pipe house, the air supply plate, the air supply fan, the breathable sheet, the exhaust fan, the filter, the exhaust box, the non-breathable sheet and the power supply equipment is 30 kg or less.