Ventilation booths and enclosures for ventilation booths

Abstract

To ensure high suction power and a wide working area without providing a plate extending obliquely inside a ventilation booth housing for sucking dust and odors. [Solution] The ventilation booth housing 1 has a rectangular opening 21, a back panel member 6 facing the opening, four side members 3, 4, 5 connecting the four sides of the opening surface to the four sides of the back panel member, and an intake fan main body 2 that exhausts air inside the ventilation booth housing to the outside, and exhausts air inside the ventilation booth housing to the outside through a back suction plate member 7 having multiple back side penetrations provided between the back panel member and the opening surface, and an upper penetration provided on the upper side of the back suction plate member.

Description

[Technical field]

[0001] This invention relates to a ventilation booth and a housing for a ventilation booth for sucking in dust and odors such as paint dust and odors generated during painting and dust and powder generated during sanding. [Background technology]

[0002] When paint is sprayed on a painting target, some of the paint scatters without adhering to the painting target. The scattered paint is made up of the resin and pigment that form the coating film, which are the paint components, and the organic solvent that dissolves the resin evaporates. This pigment-containing powder pollutes the painting environment, and the evaporated organic solvent emits an odor. A ventilation booth is known for sucking in the paint and its odor that scatters during painting and discharging it outside the painting environment. For example, Patent Document 1 describes a ventilation booth in which an inclined plate that approaches the bottom as it moves toward the rear is installed inside a box-shaped housing with an open front, with a gap between the inner surface of the housing and the air inside the housing in front of the inclined plate is sucked in through the gap. This ventilation booth has a problem in that the work area inside the housing is narrowed due to the inclined plate. [Prior art documents] [Patent documents]

[0003] Utility model registration No. 3219665 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to solve the above-mentioned problems, the present invention provides a ventilation booth and a housing for a ventilation booth that combine a large suction force and a large working area inside the housing. [Means for solving the problem]

[0005] The ventilation booth housing has a rectangular opening, a rectangular back panel member facing the opening, and four side panels connecting the four sides of the opening surface to the four sides of the back panel member, the side panels comprising an installation surface side panel member providing an installation surface portion, a ceiling side panel member positioned opposite the installation surface side panel member, and a left panel member and a right panel member connecting the installation surface side panel member and the ceiling side panel member, the ventilation booth housing having an intake fan mounting opening provided in the ceiling side panel member or the back panel member, the ventilation booth housing having an upper partition panel provided between the ceiling side panel member and the installation surface side panel member, a rear side suction panel member having multiple rear side through-portions provided between the rear panel member and the opening surface, and an opening surface upper shielding plate provided above the opening, the rear side chamber space surrounded by the rear panel member, the rear side suction panel member, and the opening surface upper shielding plate communicates with the upper side chamber space between the ceiling side panel member and the upper partition panel, and there is an upper through-portion on the upper side of the rear side suction panel member. Effect of the Invention

[0006] The object to be painted is placed in the housing and paint is sprayed on it. The powder and evaporated organic solvent scattered as the paint is sprayed are sucked in over a wide area by the rear suction plate member having multiple through-holes and discharged outside the housing. Since it can be sucked in over a wide area, it can be efficiently discharged outside the housing. Since the evaporated organic solvent diffuses and many of the components rise, it is also sucked in through the upper through-holes provided at the top of the rear suction plate member and discharged outside the housing. Therefore, the evaporated organic solvent can be more reliably discharged outside the housing, and odors remaining in the painting environment can be reduced. As described above, it is possible to exert a high suction force, and at the same time, since it is not necessary to tilt the rear suction plate member, most of the inside of the ventilation booth housing can be made into a space, and a large working area can be secured. In addition, when cutting an object using a cutting machine that requires a large working space, the object to be cut is placed in the housing and cut. The powder scattered as a result of cutting can be sucked in over a wide area by the rear suction plate member having multiple through-holes and discharged outside the housing. Since there is no need to tilt the rear suction plate member, most of the interior of the ventilation booth housing can be left as a gap, allowing cutting to be performed in a wide working area. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a ventilation booth according to a first embodiment of the present invention; [Diagram 2] FIG. 1 is a diagram showing the ventilation booth housing and the intake fan body of the ventilation booth according to the first embodiment of the present invention in a separated state. [Diagram 3] Exploded view of the ventilation booth housing according to the first embodiment of the present invention. [Figure 4] Cross section AA of Figure 2 [Diagram 5] FIG. 2 is a perspective view of a ventilation booth according to a second embodiment of the present invention; [Figure 6] FIG. 1 shows the ventilation booth housing and the intake fan body of the ventilation booth according to the second embodiment of the present invention in a separated state. [Figure 7] Exploded view of the ventilation booth housing of the second embodiment of the present invention [Figure 8] Cross section B-B of Figure 6 [Figure 9] FIG. 3 is a perspective view of a ventilation booth according to a third embodiment of the present invention; [Figure 10] FIG. 11 is a diagram showing the ventilation booth of the third embodiment according to the present invention in a separated state from the ventilation booth housing and the intake fan body. [Figure 11] Exploded view of the ventilation booth housing of the third embodiment of the present invention [Figure 12] Cross section CC of Figure 10 [Figure 13] FIG. 4 is a perspective view of a ventilation booth according to the fourth embodiment of the present invention; [Figure 14] FIG. 11 is a diagram showing the ventilation booth of the fourth embodiment according to the present invention in a separated state from the ventilation booth housing and the intake fan body. [Figure 15] Exploded view of the ventilation booth housing of the fourth embodiment of the present invention [Figure 16] DD cross section of Figure 14 [Figure 17] FIG. 5 is a perspective view of a ventilation booth according to the present invention; [Figure 18]FIG. 11 is a diagram showing the ventilation booth of the fifth embodiment according to the present invention in a separated state from the ventilation booth housing and the intake fan body. [Figure 19] An exploded view of the ventilation booth housing of the fifth embodiment of the present invention. [Figure 20] EE cross section of Figure 18 [Figure 21] FIG. 6 is a perspective view of a ventilation booth according to the sixth embodiment of the present invention; [Figure 22] FIG. 13 is a diagram showing the ventilation booth of the sixth embodiment according to the present invention in a separated state from the ventilation booth housing and the intake fan body. [Diagram 23] Exploded view of the ventilation booth housing of the sixth embodiment of the present invention [Figure 24] FF cross section of Figure 22 [Diagram 25] FIG. 7 is a perspective view of a ventilation booth according to the present invention; [Figure 26] FIG. 13 is a diagram showing the ventilation booth of the seventh embodiment of the present invention in a separated state from the ventilation booth housing and the intake fan body. [Figure 27] Exploded view of the ventilation booth housing of the seventh embodiment of the present invention [Figure 28] Cross section G of Figure 26 [Figure 29] FIG. 8 is a perspective view of a ventilation booth according to the present invention; [Diagram 30] FIG. 9 is a perspective view of a ventilation booth according to the present invention; [Diagram 31] FIG. 9 is a perspective view of a ventilation booth housing according to the present invention; [Diagram 32] Exploded view of the ventilation booth housing of the 9th embodiment of the present invention. [Diagram 33] Exploded view of the ventilation booth housing of the 9th embodiment of the present invention. [Diagram 34] Plan view of the ventilation booth of the 9th embodiment of the present invention. [Diagram 35] HH cross section of Figure 34 [Diagram 36] FIG. 13 shows the flow of suction air in the ventilation booth of the ninth embodiment of the present invention. [Figure 37]FIG. 13 is a diagram showing the shape of the openings of the rear suction plate member and the upper suction plate member of the ventilation booth housing of the ninth embodiment according to the present invention. [Figure 38] FIG. 13 is a diagram showing the relationship between the opening areas of the rear suction plate member and the upper suction plate member of the ventilation booth housing of the ninth embodiment according to the present invention. [Figure 39] The first storage position of the intake fan body of the ventilation booth according to the ninth embodiment of the present invention [Diagram 40] The second storage position of the intake fan body of the ventilation booth of the ninth embodiment of the present invention [Diagram 41] FIG. 10 is a perspective view of a ventilation booth according to the present invention; [Diagram 42] Plan view of the ventilation booth of the tenth embodiment of the present invention [Diagram 43] Section II of Figure 42 [Diagram 44] FIG. 11 is a perspective view of a ventilation booth according to the present invention; [Diagram 45] Plan view of the ventilation booth of the eleventh embodiment of the present invention [Figure 46] Cross section of JJ in Figure 45 [Figure 47] FIG. 12 is a perspective view of a ventilation booth according to the present invention; [Figure 48] Exploded view of the ventilation booth housing of the twelfth embodiment of the present invention. [Figure 49] Plan view of the ventilation booth of the twelfth embodiment of the present invention. [Figure 50] KK cross section of Figure 49 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The invention will be illustrated using several examples below. EXAMPLES

[0009] A first embodiment of the present invention will now be described with reference to the accompanying drawings. First, the configuration of this embodiment will be described.

[0010] As shown in FIG. 1 to FIG. 3, the ventilation booth 100 of this embodiment has a ventilation booth housing 1 and an intake fan body 2 attached thereto. The ventilation booth housing 1 has a rectangular opening 21, a rectangular back plate member 6 facing the opening 21, and four side members connecting the four sides of the opening 21 and the four sides of the back plate member 6. The four side members are an installation surface side plate member 3 that provides an installation surface portion, a ceiling side plate member 20-1 that faces the installation surface side plate member 3, and a left side plate member 4 and a right side plate member 5 that connect the installation surface side plate member 3 and the ceiling side plate member 20-1. An intake fan installation opening 22 is opened in the ceiling side plate member 20-1, and an intake fan body 2 is attached to the intake fan installation opening 22. An exhaust duct (not shown) for communicating the intake fan body 2 with the outdoors is connected to the intake fan body 2. The suction fan main body 2 draws in air outside the ventilation booth housing 1 through the opening 21, and generates an air flow that exhausts the air inside the ventilation booth housing 1 from the suction fan mounting opening 22 to the outdoors through an exhaust duct (not shown). Work such as painting and sanding is carried out inside the ventilation booth housing 1. Powder, dust, odors, etc. that are generated during work inside the ventilation booth housing 1 are exhausted to the outside of the ventilation booth housing 1 through the suction fan mounting opening 22 by the air flow generated by the suction fan main body 2. The ventilation booth housing 1 further includes an upper surface partition plate 25 provided between the ceiling side member 20-1 and the installation side plate member 3, a rear surface suction plate member 7 having a plurality of rear surface penetration portions provided between the rear surface plate member 6 and the opening 21, and an opening surface upper shielding plate 31 provided above the opening 21. A rear surface chamber space 23 surrounded by the rear surface plate member 6, the rear surface suction plate member 7, the left side plate member 4, and the right side plate member 5 communicates with an upper surface chamber space 24 surrounded by the ceiling side member 20-1, the upper surface partition plate 25, the opening surface upper shielding plate 31, the left side plate member 4, and the right side plate member 5, and opens a rear surface gap 7-1 (upper penetration portion) above the rear surface suction plate member 7.

[0011] The operation and effect of the first embodiment will be described with reference to FIG. 4. Use as a painting booth will be described as an example. When painting, the object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. The air flow generated by the suction fan main body 2 sucks the powder and evaporated organic solvent scattered inside the ventilation booth housing 1 as the paint is sprayed from the rear suction plate member 7 having multiple rear side through-holes into the rear chamber space 23. The powder and evaporated organic solvent sucked into the rear chamber space 23 are exhausted to the outside through the upper chamber space 24, the suction fan mounting opening 22, and the exhaust duct (not shown) connected to the suction fan main body 2. The evaporated organic solvent that is scattered inside the ventilation booth housing 1 as the paint is sprayed diffuses, and since much of the component rises, it is sucked in not only through the rear suction plate member 7 but also through the rear gap 7-1 (upper through-hole) provided at the top of the rear suction plate member 7, and sucked into the rear chamber space 23, and then passes through the upper chamber space 24, the suction fan mounting opening 22, and is discharged to the outdoors through an exhaust duct (not shown) connected to the suction fan main body 2. Powder and evaporated organic solvent scattered in the ventilation booth housing 1 due to the spraying of paint can be sucked in over a wide area by the multiple rear side through-holes provided in the rear side suction plate member 7, so that they can be efficiently discharged outside the ventilation booth housing 1. The evaporated organic solvent, which also contains components that diffuse and rise, is sucked in through the rear side gap 7-1 (upper through-hole) provided at the top of the rear side suction plate member 7 and discharged outside the ventilation booth housing 1, so that the evaporated organic solvent can be more reliably discharged outside the ventilation booth housing 1, and odors remaining in the painting environment can be reduced. As described above, a high suction force can be exerted, and at the same time, since there is no need to tilt the rear side suction plate member 7, most of the interior of the ventilation booth housing 1 can be made into a gap, and a wide work area can be secured. In addition, in this embodiment, the suction fan main body 2 is disposed at the top of the ventilation booth housing 1, so that the installation area of ​​the ventilation booth housing 1 can be reduced, making it possible to paint even in a narrow place. EXAMPLES

[0012] In Example 2, an opening-side gap 27 (upper through-portion) is provided instead of the back-side gap 7-1 (upper through-portion) of Example 1. The following describes Example 2, focusing on the differences from Example 1. The same numbers in the drawings are used for the same parts as in Example 1.

[0013] 5 to 7, the ventilation booth housing 1 of the ventilation booth 100 of this embodiment includes an upper side partition plate 25 provided between the ceiling side member 20-1 and the installation side plate member 3, a rear side suction plate member 7 having a plurality of rear side penetrations provided between the rear plate member 6 and the opening 21, and an opening surface upper shielding plate 31 provided above the opening 21. A rear side chamber space 23 surrounded by the rear plate member 6, the rear side suction plate member 7, the left side plate member 4, and the right side plate member 5 communicates with an upper side chamber space 24 surrounded by the ceiling side member 20-1, the upper side partition plate 25, the opening surface upper shielding plate 31, the left side plate member 4, and the right side plate member 5, and an opening side gap 27 (upper penetration portion) is opened between the opening surface upper shielding plate 31 and the upper side partition plate 25.

[0014] The operation and effect of the second embodiment will be described with reference to FIG. 8. Use as a painting booth will be described as an example. When painting, the object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. The air flow generated by the suction fan main body 2 sucks the powder and evaporated organic solvent scattered inside the ventilation booth housing 1 as the paint is sprayed from the rear suction plate member 7 having multiple rear side through-holes into the rear chamber space 23. The powder and evaporated organic solvent sucked into the rear chamber space 23 are exhausted to the outside through the upper chamber space 24, the suction fan mounting opening 22, and an exhaust duct (not shown) connected to the suction fan main body 2. The evaporated organic solvents that are scattered inside the ventilation booth housing 1 as the paint is sprayed diffuse, and since many of the components rise, they are sucked in not only through the rear suction plate member 7 but also through the opening side gap 27 (upper through-hole) that opens between the upper opening surface shielding plate 31 and the upper side partition plate 25, and are exhausted to the outdoors through the suction fan mounting opening 22 via the upper side chamber space 24 and an exhaust duct (not shown) connected to the suction fan main body 2. In this embodiment, at the opening 21 through which evaporated organic solvent inside the ventilation booth housing 1 leaks to the outside of the ventilation booth housing 1, the evaporated organic solvent is sucked in from the opening side gap 27 (upper through-hole) before leaking to the outside, and is discharged through the upper chamber space 24, the suction fan mounting opening 22, and an exhaust duct (not shown) to the outdoors. As in the first embodiment, the powder and evaporated organic solvent scattered in the ventilation booth housing 1 due to the spraying of the paint can be sucked in over a wide area by the multiple rear side through-holes provided in the rear side suction plate member 7, so that they can be efficiently discharged outside the ventilation booth housing 1. The evaporated organic solvent, which also contains components that diffuse and rise, is also sucked in through the opening side gap 27 (upper through-hole) opened between the upper opening surface shielding plate 31 and the upper side partition plate 25 and discharged outside the ventilation booth housing 1, so that the evaporated organic solvent can be more reliably discharged outside the ventilation booth housing 1, and odors remaining in the painting environment can be reduced. The evaporated organic solvent is sucked in at a position where it leaks out from the opening 21 of the ventilation booth housing 1, so that it can be efficiently sucked in. As described above, a high suction force can be exerted, and at the same time, since there is no need to tilt the rear side suction plate member 7, most of the inside of the ventilation booth housing 1 can be made into a space, and a wide work area can be secured. EXAMPLES

[0015] In Example 3, an upper suction plate member 8 (upper through-portion) is provided instead of the upper partition plate 25 (upper through-portion) of Example 1. The following describes Example 3, focusing on the differences from Example 1. The same numbers in the drawings are used for the same parts as in Example 1.

[0016] 9 to 11, the ventilation booth housing 1 of the ventilation booth 100 of this embodiment includes an upper suction plate member 8 (upper penetration portion) having a plurality of upper penetration portions provided between the ceiling side member 20-1 and the installation side plate member 3, a rear suction plate member 7 having a plurality of rear penetration portions provided between the rear plate member 6 and the opening 21, and an opening upper shielding plate 31 provided above the opening 21. A rear chamber space 23 surrounded by the rear plate member 6, the rear suction plate member 7, the left plate member 4, and the right plate member 5 communicates with an upper chamber space 24 surrounded by the ceiling side member 20-1, the upper suction plate member 8 (upper penetration portion), the opening upper shielding plate 31, the left plate member 4, and the right plate member 5.

[0017] The operation and effect of the third embodiment will be described with reference to FIG. 12. Use as a painting booth will be described as an example. When painting, the object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. The air flow generated by the suction fan main body 2 sucks the powder and evaporated organic solvent scattered inside the ventilation booth housing 1 as the paint is sprayed from the rear suction plate member 7 having multiple rear side through-holes into the rear chamber space 23. The powder and evaporated organic solvent sucked into the rear chamber space 23 are exhausted to the outside through the upper chamber space 24, the suction fan mounting opening 22, and the exhaust duct (not shown) connected to the suction fan main body 2. The evaporated organic solvents that are scattered inside the ventilation booth housing 1 as the paint is sprayed diffuse, and since many of the components rise, they are sucked in not only through the rear suction plate member 7 but also through the top suction plate member 8 (upper penetration portion) which has multiple top-side penetration portions, and are discharged to the outdoors through the suction fan mounting opening 22 via the top-side chamber space 24 and an exhaust duct (not shown) connected to the suction fan main body 2. In this embodiment, the evaporated organic solvent in the ventilation booth housing 1 can be sucked in over a wider area through the upper suction plate member 8 (upper through-hole) which has multiple upper through-holes, and therefore can be more efficiently exhausted to the outdoors through the upper chamber space 24, the suction fan mounting opening 22, and an exhaust duct not shown. As in the first embodiment, the powder and evaporated organic solvent scattered in the ventilation booth housing 1 due to the spraying of the paint can be sucked in over a wide area by the multiple rear side through-holes provided in the rear side suction plate member 7, so that they can be efficiently discharged outside the ventilation booth housing 1. The evaporated organic solvent, which also contains components that diffuse and rise, can also be sucked in over a wide area by the upper side suction plate member 8 (upper through-hole) having multiple upper side through-holes provided between the ceiling side member 20-1 and the installation side plate member 3, so that the evaporated organic solvent can be more reliably discharged outside the ventilation booth housing 1, and the odor remaining in the painting environment can be reduced. As described above, a high suction force can be exerted, and at the same time, since there is no need to tilt the rear side suction plate member 7, most of the interior of the ventilation booth housing 1 can be made into a space, and a wide work area can be secured. EXAMPLES

[0018] In Example 4, a rear side gap 7-1 (upper through-portion) and an opening side gap 27 (upper through-portion) are added to Example 3. The following describes Example 4, focusing on the differences from Example 3. The same numbers in the drawings are used for the same parts as in Example 3.

[0019] 13 to 15, the ventilation booth housing 1 of the ventilation booth 100 of this embodiment includes an upper suction plate member 8 (upper penetration portion) having a plurality of upper penetration portions provided between the ceiling side member 20-1 and the installation side plate member 3, a rear suction plate member 7 having a plurality of rear penetration portions provided between the rear plate member 6 and the opening 21, and an opening upper shielding plate 31 provided above the opening 21. A rear chamber space 23 surrounded by the rear plate member 6, the rear suction plate member 7, the left plate member 4, and the right plate member 5 communicates with an upper chamber space 24 surrounded by the ceiling side member 20-1, the upper suction plate member 8 (upper penetration portion), the opening upper shielding plate 31, the left plate member 4, and the right plate member 5. A rear side gap 7-1 (upper through portion) is opened on the upper side of the rear side suction plate member 7, and an opening side gap 27 (upper through portion) is opened between the opening surface upper shielding plate 31 and the upper side suction plate member 8 (upper through portion).

[0020] The operation and effect of the fourth embodiment will be described with reference to FIG. 16. Use as a painting booth will be described as an example. When painting, the object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. The air flow generated by the suction fan main body 2 sucks the powder and evaporated organic solvent scattered inside the ventilation booth housing 1 as the paint is sprayed from the rear suction plate member 7 having multiple rear side through-holes into the rear chamber space 23. The powder and evaporated organic solvent sucked into the rear chamber space 23 are exhausted to the outside through the upper chamber space 24, the suction fan mounting opening 22, and the exhaust duct (not shown) connected to the suction fan main body 2. The evaporated organic solvent that is scattered inside the ventilation booth housing 1 as the paint is sprayed diffuses, and since much of the component rises, it is sucked in not only through the rear side suction plate member 7, but also through the upper side suction plate member 8 (upper penetration portion) which has multiple upper side penetration portions, the opening side gap 27 (upper penetration portion), and the rear side gap 7-1 (upper penetration portion), and is discharged outdoors through the upper side chamber space 24, the suction fan mounting opening 22, and an exhaust duct (not shown) connected to the suction fan main body 2. In this embodiment, the evaporated organic solvent in the ventilation booth housing 1 can be sucked in over a wider area through the upper suction plate member 8 (upper penetration portion) which has multiple upper penetration portions, the opening side gap 27 (upper penetration portion), and the rear side gap 7-1 (upper penetration portion), so that it can be more efficiently exhausted to the outdoors through the upper chamber space 24, the suction fan mounting opening 22, and an exhaust duct not shown. As in the first embodiment, the powder and evaporated organic solvent scattered in the ventilation booth housing 1 due to the spraying of the paint can be sucked in over a wide area by the multiple rear side through-holes provided in the rear side suction plate member 7, so that they can be efficiently discharged outside the ventilation booth housing 1. The evaporated organic solvent, which also contains components that diffuse and rise, can be sucked in over a wide area from the upper side suction plate member 8 (upper through-hole) having multiple upper side through-holes provided between the ceiling side member 20-1 and the installation side plate member 3, the rear side gap 7-1 (upper through-hole) opening on the upper side of the rear side suction plate member 7, and the opening side gap 27 (upper through-hole) opening between the opening surface upper shielding plate 31 and the upper side suction plate member 8 (upper through-hole), so that the evaporated organic solvent can be more reliably discharged outside the ventilation booth housing 1, and the odor remaining in the painting environment can be reduced. As described above, it is possible to exert a high suction force, and at the same time, since there is no need to tilt the rear suction plate member 7, most of the interior of the ventilation booth housing 1 can be left as a space, ensuring a large working area. EXAMPLES

[0021] In Example 5, the left side plate member 4, the right side plate member 5, and the opening surface upper shielding plate 31 are made transparent, as compared to Example 4. The following describes Example 5, focusing on the differences from Example 4. The same numbers in the drawings are used for the same parts as in Example 4.

[0022] 17 to 19, the ventilation booth housing 1 of the ventilation booth 100 of this embodiment includes an upper suction plate member 8 (upper penetration portion) having a plurality of upper penetration portions provided between the ceiling side member 20-1 and the installation side plate member 3, a rear suction plate member 7 having a plurality of rear penetration portions provided between the rear plate member 6 and the opening 21, and an opening upper shielding plate 31 provided above the opening 21. A rear chamber space 23 surrounded by the rear plate member 6, the rear suction plate member 7, the left plate member 4, and the right plate member 5 communicates with an upper chamber space 24 surrounded by the ceiling side member 20-1, the upper suction plate member 8 (upper penetration portion), the opening upper shielding plate 31, the left plate member 4, and the right plate member 5. A rear side gap 7-1 (upper through-portion) is opened on the upper side of the rear side suction plate member 7, and an opening side gap 27 (upper through-portion) is opened between the opening side plate member 31 and the upper side partition plate 8 (upper through-portion). The left side plate member 4 and the right side plate member 5 and the opening upper shielding plate 31 are formed of transparent plate material.

[0023] The operation and effect of the fifth embodiment will be described with reference to Figs. 17 and 20. Use as a painting booth will be described as an example. When painting, an object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. Light from outside the ventilation booth housing 1, such as sunlight or indoor lighting, passes through the left side plate member 4 and the right side plate member 5 and the opening surface upper shielding plate 31, which are made of transparent plate material, and brightly illuminates the object to be painted placed inside the ventilation booth housing 1. As in Example 4, the powder scattered in the ventilation booth housing 1 and the evaporated organic solvent due to the spraying of the paint can be sucked in over a wide area by the multiple rear side penetrations provided in the rear side suction plate member 7, so that they can be efficiently discharged outside the ventilation booth housing 1. The evaporated organic solvent, which also contains components that diffuse and rise, can be sucked in over a wide area from the upper side suction plate member 8 (upper penetration portion) having multiple upper side penetrations provided between the ceiling side member 20-1 and the installation side plate member 3, the rear side gap 7-1 (upper penetration portion) opening on the upper side of the rear side suction plate member 7, and the opening side gap 27 (upper penetration portion) opening between the opening surface upper shielding plate 31 and the upper side suction plate member 8 (upper penetration portion), so that the evaporated organic solvent can be more reliably discharged outside the ventilation booth housing 1, and the odor remaining in the painting environment can be reduced. As described above, a high suction force can be exerted, and at the same time, since there is no need to tilt the rear suction plate member 7, most of the interior of the ventilation booth housing 1 can be left as a gap, ensuring a large work area. In this embodiment, light from outside the ventilation booth housing 1, such as sunlight or indoor lighting, passes through the left side plate member 4 and right side plate member 5 and the upper opening surface shielding plate 31, which are made of transparent plate material, and brightly illuminates the object to be painted placed inside the ventilation booth housing 1, improving the visibility of the painting state. In this embodiment, the left side plate member 4, the right side plate member 5, and the upper opening shielding plate 31 are made of transparent plate material, but any one of the left side plate member 4, the right side plate member 5, or the upper opening shielding plate 31 may be made of a transparent plate material. Alternatively, a transparent window may be provided in part of the left side plate member 4, the right side plate member 5, or the upper opening shielding plate 31. EXAMPLES

[0024] In the sixth embodiment, the intake fan mounting opening 22 is opened in the back panel member 6-1 with the intake fan mounting opening, instead of in the ceiling side member 20-1, as compared with the third embodiment. The sixth embodiment will be described below, focusing on the differences from the third embodiment. The same numbers in the drawings are used for the same parts as the third embodiment.

[0025] 21 to 23, the ventilation booth housing 1 of the ventilation booth 100 of this embodiment includes an upper suction plate member 8 (upper penetration portion) having a plurality of upper penetration portions provided between the ceiling side plate member 30-1 and the installation side plate member 3, a rear suction plate member 7 having a plurality of rear penetration portions provided between the rear plate member 6 and the opening 21, and an opening upper shielding plate 31 provided above the opening 21. A rear chamber space 23 surrounded by the rear plate member 6, the rear suction plate member 7, the left plate member 4, and the right plate member 5 communicates with an upper chamber space 24 surrounded by the ceiling side plate member 20-1, the upper suction plate member 8 (upper penetration portion), the opening upper shielding plate 31, the left plate member 4, and the right plate member 5. The back panel member 6-1 with the suction fan mounting opening has a suction fan mounting opening 22, and the suction fan body 2 is attached to the suction fan mounting opening 22. An exhaust duct (not shown) for communicating the suction fan body 2 with the outdoors is connected to the suction fan body 2. The suction fan body 2 draws in air from the opening 21 outside the ventilation booth housing 1, and generates an air flow that exhausts the air inside the ventilation booth housing 1 from the suction fan mounting opening 22 to the outdoors through the exhaust duct (not shown). Work such as painting and sanding is performed inside the ventilation booth housing 1. Powder, dust, odors, etc. generated during work inside the ventilation booth housing 1 are exhausted to the outside of the ventilation booth housing 1 from the suction fan mounting opening 22 by the air flow generated by the suction fan body 2.

[0026] The operation and effect of the sixth embodiment will be described with reference to FIG. 24. Use as a painting booth will be described as an example. When painting, the object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. The air flow generated by the suction fan main body 2 sucks the powder and evaporated organic solvent scattered inside the ventilation booth housing 1 as the paint is sprayed from the rear suction plate member 7 having multiple rear side through-holes into the rear chamber space 23. The powder and evaporated organic solvent sucked into the rear chamber space 23 are exhausted to the outside from the suction fan mounting opening 22 through an exhaust duct (not shown) connected to the suction fan main body 2. The evaporated organic solvents that are scattered inside the ventilation booth housing 1 as the paint is sprayed diffuse, and since many of the components rise, they are sucked in not only through the rear suction plate member 7 but also through the upper suction plate member 8 (upper penetration portion) which has multiple upper side penetration portions, and are discharged outside through the upper side chamber space 24 and the rear side chamber space 23, the suction fan mounting opening 22, and an exhaust duct (not shown) connected to the suction fan main body 2. As described above, a high suction force can be exerted, and at the same time, since there is no need to tilt the rear suction plate member 7, most of the interior of the ventilation booth housing 1 can be made an empty space, ensuring a wide work area. In this embodiment, air is sucked into the ventilation booth housing 1 from the suction fan mounting opening 22 opened in the rear plate member 6-1 with the suction fan mounting opening, so the direction of the flow of the sucked air becomes closer to the flow from the opening 21 toward the rear plate member 6-1 with the suction fan mounting opening, and the angle with the direction of the flow of the paint sprayed from the opening 21 can be reduced, so that the sprayed paint can be more efficiently attached to the object to be painted. EXAMPLES

[0027] Example 7 is different from Example 6 in that it has an upper side partition plate 25 and an opening side gap 27 (upper through-hole portion) instead of the upper side suction plate member 8. Example 7 will be described below, focusing on the differences from Example 6. The same numbers in the drawings are used for the same parts as Example 6.

[0028] As shown in Figures 25 to 27, the ventilation booth housing 1 of the ventilation booth 100 of this embodiment includes an upper partition plate 25 provided between the ceiling side plate member 30-1 and the installation side plate member 3, a rear suction plate member 7 having a plurality of rear penetrations provided between the rear plate member 6 and the opening 21, and an opening upper shield plate 31 provided above the opening 21. A rear chamber space 23 surrounded by the rear plate member 6, the rear suction plate member 7, the left plate member 4, and the right plate member 5 communicates with an upper chamber space 24 surrounded by the ceiling side plate member 30-1, the upper partition plate 25, the opening upper shield plate 31, the left plate member 4, and the right plate member 5, and an opening gap 27 (upper penetration) is opened between the opening upper shield plate 31 and the upper partition plate 25. The back panel member 6-1 with the suction fan mounting opening has a suction fan mounting opening 22, and the suction fan body 2 is attached to the suction fan mounting opening 22. An exhaust duct (not shown) for communicating the suction fan body 2 with the outdoors is connected to the suction fan body 2. The suction fan body 2 draws in air from the opening 21 outside the ventilation booth housing 1, and generates an air flow that exhausts the air inside the ventilation booth housing 1 from the suction fan mounting opening 22 to the outdoors through the exhaust duct (not shown). Work such as painting and sanding is performed inside the ventilation booth housing 1. Powder, dust, odors, etc. generated during work inside the ventilation booth housing 1 are exhausted to the outside of the ventilation booth housing 1 from the suction fan mounting opening 22 by the air flow generated by the suction fan body 2.

[0029] The operation and effect of the seventh embodiment will be described with reference to FIG. 28. Use as a painting booth will be described as an example. When painting, the object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. The air flow generated by the suction fan main body 2 sucks the powder and evaporated organic solvent scattered inside the ventilation booth housing 1 as the paint is sprayed from the rear suction plate member 7 having multiple rear side through-holes into the rear chamber space 23. The powder and evaporated organic solvent sucked into the rear chamber space 23 are exhausted to the outside from the suction fan mounting opening 22 through an exhaust duct (not shown) connected to the suction fan main body 2. The evaporated organic solvents that are scattered inside the ventilation booth housing 1 as the paint is sprayed diffuse, and since many of the components rise, they are sucked in not only through the rear suction plate member 7 but also through the opening side gap 27 (upper through-hole) opened between the upper opening surface shielding plate 31 and the upper side partition plate 25, and then pass through the upper side chamber space 24 and the rear side chamber space 23, through the suction fan mounting opening 22, and are discharged outdoors through an exhaust duct (not shown) connected to the suction fan main body 2. As described above, a high suction force can be exerted, and at the same time, since there is no need to tilt the rear suction plate member 7, most of the inside of the ventilation booth housing 1 can be made into a gap, and a wide work area can be secured. Since air inside the ventilation booth housing 1 is sucked in from the suction fan mounting opening 22 opened in the rear panel member 6-1 with the suction fan mounting opening, the direction of the flow of the sucked air becomes close to the flow from the opening 21 toward the rear panel member 6-1 with the suction fan mounting opening, and the angle with the direction of the flow of the paint sprayed from the opening 21 can be reduced, so that the sprayed paint can be more efficiently attached to the painting target. In this embodiment, the opening side gap 27 (upper penetration part) where the air intake port on the upper surface side opens at a position adjacent to the opening 21 efficiently sucks in the paint powder and evaporated organic solvent leaking from the opening 21 to the outside of the ventilation booth housing 1. In this way, the air intake on the top side draws in a concentrated area, so the direction of the intake air flow can be made closer to the flow from the opening 21 toward the back panel member 6-1 with the intake fan mounting opening, allowing the sprayed paint to adhere more efficiently to the object to be painted. EXAMPLES

[0030] In Example 8, the left side plate member 4, the right side plate member 5, the upper opening shielding plate 31, and the upper partition plate 25 are made transparent, in comparison with Example 7. The following describes Example 8, focusing on the differences from Example 4. The same numbers in the drawings are used for the same parts as in Example 7.

[0031] As shown in Fig. 29, the ventilation booth housing 1 of the ventilation booth 100 of this embodiment includes an upper surface side partition plate 25 provided between the ceiling side plate member 30-1 and the installation side plate member 3, a rear surface side suction plate member 7 having a plurality of rear surface side penetration parts provided between the rear surface plate member 6 and the opening 21, and an opening surface upper shielding plate 31 provided above the opening 21. A rear surface side chamber space 23 surrounded by the rear surface plate member 6, the rear surface side suction plate member 7, the left side plate member 4, and the right side plate member 5 communicates with an upper surface side chamber space 24 surrounded by the ceiling side plate member 30-1, the upper surface side partition plate 25, the opening surface upper shielding plate 31, the left side plate member 4, and the right side plate member 5, and an opening side gap 27 (upper penetration part) is opened between the opening surface upper shielding plate 31 and the upper surface side partition plate 25. The left side plate member 4, the right side plate member 5, the upper opening surface shielding plate 31 and the upper surface side partition plate 25 are formed of transparent plate materials.

[0032] The action and effect of the eighth embodiment will be described with reference to FIG. 29. Use as a painting booth will be described as an example. When painting, an object to be painted is placed inside the ventilation booth housing 1, and paint is sprayed from the opening 21. Light from outside the ventilation booth housing 1, such as sunlight or indoor lighting, passes through the left side plate member 4, right side plate member 5, opening surface upper shielding plate 31, and upper surface side partition plate 25, which are made of transparent plate materials, and brightly illuminates the object to be painted placed inside the ventilation booth housing 1. As in the seventh embodiment, the powder and evaporated organic solvent scattered in the ventilation booth housing 1 due to the spraying of the paint can be sucked in over a wide area by the multiple rear-side through-holes provided in the rear-side suction plate member 7, so that they can be efficiently discharged outside the ventilation booth housing 1. The evaporated organic solvent, which also contains components that diffuse and rise, can be sucked in through the opening-side gap 27 (upper through-hole) opened between the upper opening surface shielding plate 31 and the upper surface side partition plate 25, so that the evaporated organic solvent can be more reliably discharged outside the ventilation booth housing 1, and the odor remaining in the painting environment can be reduced. As described above, a high suction force can be exerted, and at the same time, since there is no need to tilt the rear-side suction plate member 7, most of the interior of the ventilation booth housing 1 can be made into a gap, and a wide work area can be secured. In this embodiment, the visibility of the coating state can be improved because light from outside the ventilation booth housing 1, such as sunlight or indoor lighting, passes through the left side plate member 4, right side plate member 5, upper opening shielding plate 31, and upper partition plate 25, which are made of transparent plate materials, to brightly illuminate the object to be coated placed inside the ventilation booth housing 1. Since light from outside the ventilation booth housing 1, such as sunlight or indoor lighting, passes through the four sides of the left side plate member 4, right side plate member 5, upper partition plate 25, and opening 21 to illuminate the inside of the ventilation booth housing 1, the visibility of the coating state can be improved more reliably. In this embodiment, the left side plate member 4, the right side plate member 5, the upper opening shielding plate 31, and the upper partition plate 25 are made of transparent plate materials, but any one of the left side plate member 4, the right side plate member 5, the upper opening shielding plate 31, or the upper partition plate 25 may be made of a transparent plate material. Alternatively, the left side plate member 4, the right side plate member 5, the upper opening shielding plate 31, or the upper partition plate 25 may be made of a transparent plate material with a transparent window provided in part thereof. EXAMPLES

[0033] A ninth embodiment of the present invention will be described with reference to the drawings. First, the configuration of this embodiment will be described.

[0034] As shown in Fig. 30 and Fig. 33, the ventilation booth 100 of this embodiment includes an opening surface 21, a back panel member 6 facing the opening surface 21, side members 3, 4, and 5 connecting the peripheral portion of the opening surface 21 and the peripheral portion of the back panel member 6, an installation surface portion 3 having a part of the side member as a flat surface, and an intake fan mounting opening 22 provided in a part of the side member or the back panel member 6, and an intake fan main body 2 is attached to the intake fan mounting opening 22 of the ventilation booth housing 1. An exhaust duct (not shown) for communicating the intake fan main body 2 with the outdoors is connected to the intake fan main body 2. The intake fan main body 2 draws in air outside the ventilation booth housing 1 through the opening 21, and generates an air flow that exhausts the air in the ventilation booth housing 1 from the intake fan mounting opening 22 through the exhaust duct (not shown) to the outdoors.

[0035] Specifically, as shown in Fig. 30 and Fig. 33, the ventilation booth housing 1 is composed of a frame member that is a hexahedron with 12 sides composed of rod-shaped members. The installation surface side plate member 3 is fixed to at least one of the first rod-shaped member 9, the second rod-shaped member 10, the third rod-shaped member 11, and the fourth rod-shaped member 12 that constitute a quadrangular frame on the installation surface side. The ninth rod-shaped member 17, the tenth rod-shaped member 18, the eleventh rod-shaped member 19, and the twelfth rod-shaped member 20 extend to the ceiling side from the four vertices of the quadrangular frame on the installation surface side formed by the first rod-shaped member 9, the second rod-shaped member 10, the third rod-shaped member 11, and the fourth rod-shaped member 12. The back plate member 6 is fixed to at least one of the third rod-shaped member 11, the tenth rod-shaped member 18, the seventh rod-shaped member 15, and the eleventh rod-shaped member 19 that constitute a quadrangular frame extending from the installation surface side plate member 3 to the ceiling side. The left side plate member 4 is fixed to at least one of the fourth rod-shaped member 12, the eleventh rod-shaped member 19, the eighth rod-shaped member 16, and the twelfth rod-shaped member 20, which extend from the installation surface side plate member 3 toward the ceiling and form a quadrangular frame adjacent to the back plate member at a position opposite the left side plate member 4, and the right side plate member 5 is fixed to at least one of the second rod-shaped member 10, the tenth rod-shaped member 18, the sixth rod-shaped member 14, and the ninth rod-shaped member 17, which extend from the installation surface side plate member 3 toward the ceiling and form a quadrangular frame adjacent to the back plate member at a position opposite the left side plate member 4. The inside surrounded by the first rod-shaped member 9, the ninth rod-shaped member 17, the fifth rod-shaped member 13, and the twelfth rod-shaped member 20, which extend from the installation surface side plate member 3 toward the ceiling and form a quadrangular frame at a position opposite the back plate member 6, is an opening surface 21. At the top of the opening surface 21, the opening surface upper shielding plate 31 is fixed to the ends of the sixth rod-shaped member 14 and the eighth rod-shaped member 16. The inside surrounded by the fifth rod-shaped member 13, the sixth rod-shaped member 14, the seventh rod-shaped member 15, and the eighth rod-shaped member 16 forming a rectangular frame at a position facing the installation surface side plate member 3 is the intake fan mounting opening 22. As shown in Figs. 5 and 6, the surface formed by the upper surfaces of the fifth rod-shaped member 13, the sixth rod-shaped member 14, the seventh rod-shaped member 15, and the eighth rod-shaped member 16, which have a rectangular cross section, is the ceiling side surface member. The intake fan main body 2 is fixed to the upper surfaces of the fifth rod-shaped member 13, the sixth rod-shaped member 14, the seventh rod-shaped member 15, and the eighth rod-shaped member 16 forming the ceiling side surface member.

[0036] As shown in Figs. 30 and 31, the upper surface suction plate member 8 (upper penetration portion) is rectangular and has multiple penetration portions, and is fixed to the lower surface of the sixth rod-shaped member 14 and the eighth rod-shaped member 16, which have a rectangular cross section. An upper opening shield plate 31 is provided at the top of the opening 21. The state in which multiple penetration portions are provided means that at least 10 penetration portions are distributed within the surface of the upper surface suction plate member 8 (upper penetration portion). As shown in Figs. 31 to 34, the space surrounded by the ceiling side member formed by the upper surfaces of the fifth rod-shaped member 13, the sixth rod-shaped member 14, the seventh rod-shaped member 15, and the eighth rod-shaped member 16, the upper surface suction plate member 8 (upper penetration portion), the upper opening shield plate 31, the left side plate member 4, and the right side plate member 5 is the upper surface chamber space 24. The ventilation booth housing 1 further includes an upper surface partition plate 25 provided between the ceiling side member 20-1 and the installation side plate member 3, a rear surface suction plate member 7 having a plurality of rear surface penetration portions provided between the rear surface plate member 6 and the opening 21, and an opening surface upper shielding plate 31 provided above the opening 21. A rear surface chamber space 23 surrounded by the rear surface plate member 6, the rear surface suction plate member 7, the left side plate member 4, and the right side plate member 5 communicates with an upper surface chamber space 24 surrounded by the ceiling side member 20-1, the upper surface partition plate 25, the opening surface upper shielding plate 31, the left side plate member 4, and the right side plate member 5, and opens a rear surface gap 7-1 (upper penetration portion) above the rear surface suction plate member 7.

[0037] As shown in Figures 32 and 33, inside the ventilation booth housing 1, a rectangular rear suction plate member 7 having a plurality of through-holes is fixed to the surfaces of the opening surface 21 side of the tenth rod-shaped member 18 and the eleventh rod-shaped member 19, each of which has a rectangular cross section. Specifically, the state in which a plurality of through-holes are provided means that at least ten through-holes are distributed within the surface of the rear suction plate member 7. As shown in Figures 31 to 35, the space formed between the rear plate member 6 and the rear suction plate member 7 is referred to as a rear chamber space 23.

[0038] One side of the rear suction plate member 7 and one side of the upper suction plate member 8 are in contact with each other, and the rear chamber space 23 communicates with the upper chamber space 24. The rear chamber space 23 communicates with the suction fan mounting opening 22 via the upper chamber space 24. The upper chamber space 24 also functions as a communication passage that communicates the rear chamber space 23 with the suction fan mounting opening 22. The ventilation booth housing 1 further includes an upper partition plate 25 provided between the ceiling side member 20-1 and the installation side plate member 3, a rear suction plate member 7 with multiple rear penetrations provided between the rear plate member 6 and the opening 21, and an opening upper shield plate 31 provided above the opening 21. A rear chamber space 23 surrounded by the rear plate member 6, the rear suction plate member 7, the left plate member 4, and the right plate member 5 is connected to an upper chamber space 24 surrounded by the ceiling side member 20-1, the upper partition plate 25, the opening surface upper shielding plate 31, the left plate member 4, and the right plate member 5, and opens a rear gap 7-1 (upper through portion) above the rear suction plate member 7.

[0039] Light from outside the ventilation booth housing 1, such as sunlight or indoor lighting, passes through the left side plate member 4, right side plate member 5, and upper opening surface shielding plate 31, which are made of transparent plate material, and brightly illuminates the object to be painted placed inside the ventilation booth housing 1. Because light from the outside can be brought into the interior of the ventilation booth housing 1, it becomes easier to visually check the condition of the object to be worked on inside the ventilation booth housing 1.

[0040] Next, the function of this embodiment will be described using an example of use as a paint booth. As shown in Fig. 36, the suction fan main body 2 draws air inside the ventilation booth housing 1 from the through-hole of the rear suction plate member 7 into the rear chamber space 23, and then draws the air through the suction fan mounting opening 22 via the upper chamber space 24 as a communication passage, and discharges it to the outside of the ventilation booth housing 1. The flow of the suction air inside the rear chamber space 23 and the upper chamber space 24 includes a flow toward the suction fan mounting opening 22 and a vortex generated in each chamber. When painting, the object to be painted is placed inside the ventilation booth housing 1. The object to be painted is placed on the installation side plate member 3 or supported by hand. Paint is sprayed onto the object to be painted from the opening surface 21. The sprayed paint that does not hit the object to be painted or the paint that bounces off the object to be painted is carried by the flow of the intake air shown in FIG. 34 and flows into the rear chamber space 23 from the through-hole of the rear suction plate member 7. The paint that has flowed into the rear chamber space 23 is discharged by the intake air toward the intake fan mounting opening 22 while being swirled by the suction air. In the process of the paint being swirled by the suction air, the moisture of the organic solvent of the dust contained in the intake air dries. Therefore, the paint dries and becomes dusty, which prevents the paint from adhering to the ventilation booth housing and makes maintenance work easier.

[0041] As shown in Fig. 36, the paint discharged from the rear chamber space 23 rides on the intake airflow and flows into the upper chamber space 24. The paint that flows into the rear chamber space 23 rides on the intake airflow toward the intake fan mounting opening 22 and is discharged toward the intake fan mounting opening 22. The rear chamber space 23 functions as a communication passage. In the rear chamber space 23, the paint is also swirled by the intake airflow, and the moisture of the organic solvents in the dust contained in the intake air dries. Therefore, the paint dries further and turns into dust, which prevents the paint from adhering to the ventilation booth housing and makes maintenance work easier. The paint that flows into the suction fan mounting opening 22 is sucked into the suction fan main body 2 and is discharged outside the suction fan main body 2 via a duct (not shown).

[0042] The shape of the through-holes in the rear suction plate member 7 and the upper suction plate member 8 is selected according to the size and shape of the dust contained in the air to be sucked in, such as a circle as shown in Fig. 37(a), a rectangle as shown in Fig. 37(b), a horizontal slit as shown in Fig. 37(c), a vertical slit as shown in Fig. 37(d), etc. For example, if an even flow of intake air is desired over the entire surface of the rear suction plate member 7 and the upper suction plate member 8 to suck in paint during painting, the circle as shown in Fig. 37(a) is selected.

[0043] In order to adjust the direction of the intake air flow inside the ventilation booth housing 1 according to the coating target, the relationship between the total area of ​​the through-holes in the rear suction plate member 7 and the total area of ​​the through-holes in the upper suction plate member 8 is changed. As shown in Case 1 of Figure 38, the explanation will be based on the case where the total area per unit area of ​​the opening area of ​​the through-holes is the same for the rear suction plate member 7 and the upper suction plate member 8. As shown in Case 2 of Figure 38, when the total area per unit area of ​​the opening area of ​​the penetration parts is made smaller than that of the rear suction plate member 7, the amount of intake from the rear suction plate member 7 increases, so the direction of the intake air flow is toward the rear suction plate member 7. This is used when the object to be coated is installed at the bottom inside the ventilation booth housing 1 or when the height of the object to be coated placed on the installation surface side plate member 3 is short. As shown in Case 3 of Figure 38, when the total area per unit area of ​​the opening area of ​​the penetration parts is made larger than that of the back suction plate member 7, the amount of intake from the top suction plate member 8 increases, so the direction of the intake air flow is toward the top suction plate member 8. This is used when the object to be coated is installed at the top inside the ventilation booth housing 1 or when the height of the object to be coated placed on the installation surface side plate member 3 is tall. As shown in Figure 38 Case 4, when the total area per unit area of ​​the opening area of ​​the through-hole is made smaller than that of Figure 38 Case 1 for both the rear suction plate member 7 and the top suction plate member 8, the direction of the suction air flow is the same as Figure 38 Case 1, but since the suction speed is faster, it is easier to prevent paint from leaking out from the opening surface 21 even when a large amount of paint is ejected.

[0044] A method for compactly storing the ventilation booth 100 will be described with reference to FIG. As shown in Fig. 39, the suction fan body 2 fixed to the upper surfaces of the fifth rod-shaped member 13, sixth rod-shaped member 14, seventh rod-shaped member 15, and eighth rod-shaped member 16 forming the ceiling side surface member is removed, and then the upper surface side suction plate member 8 is removed and placed on the installation surface side plate member 3. Thereafter, the suction fan body 2 is turned upside down and stored inside the ventilation booth housing 1 through the suction fan mounting opening 22, and then the suction fan body 2 is fixed to the upper surface of at least one of the fifth rod-shaped member 13, sixth rod-shaped member 14, seventh rod-shaped member 15, and eighth rod-shaped member 16 forming the ceiling side surface member. Since the suction fan body 2 can be stored inside the ventilation booth housing 1, the ventilation booth 100 can be stored in a state where the height of the entire ventilation booth 100 is reduced, and therefore the ventilation booth 100 can be stored in a smaller space.

[0045] Another method for compactly storing the ventilation booth 100 will be described with reference to FIG. As shown in FIG. 40, the intake fan body 2 fixed to the upper surfaces of the fifth rod-shaped member 13, the sixth rod-shaped member 14, the seventh rod-shaped member 15, and the eighth rod-shaped member 16 forming the ceiling side member is removed. After that, the intake fan body 2 is stored inside the ventilation booth housing 1 from the opening surface 21, and then the intake fan body 2 is fixed to at least one of the first rod-shaped member 9, the ninth rod-shaped member 17, the fifth rod-shaped member 13, and the twelfth rod-shaped member 20 forming the opening surface 21. As in the method described in FIG. 39, since the intake fan body 2 can be stored inside the ventilation booth housing 1, the height of the ventilation booth 100 as a whole can be reduced and the ventilation booth 100 can be accommodated in a narrower space. Light from outside the ventilation booth housing 1, such as sunlight and indoor lighting, passes through the left side plate member 4, the right side plate member 5, and the opening surface upper shielding plate 31 formed of transparent plate material, and brightly illuminates the painting object placed inside the ventilation booth housing 1. Since light from the outside can be received inside the ventilation booth housing 1, the state of the work target inside the ventilation booth housing 1 can be easily visually confirmed. In this embodiment, the left side plate member 4, the right side plate member 5, and the upper opening shielding plate 31 are made of transparent plate material, but any one of the left side plate member 4, the right side plate member 5, or the upper opening shielding plate 31 may be made of a transparent plate material. Alternatively, a transparent window may be provided in part of the left side plate member 4, the right side plate member 5, or the upper opening shielding plate 31. EXAMPLES

[0046] A tenth embodiment of the present invention will be described with reference to the drawings. Differences from the ninth embodiment will be described. As shown in Figs. 41 and 42, the opening adjustment upper side plate member 26, which is rectangular and has no through-hole and blocks the intake air, is fixed to the lower surface of the sixth rod-shaped member 14 and the eighth rod-shaped member 16, which have a rectangular cross section. The length of the side of the opening adjustment upper side plate member 26 that contacts the lower surface of the sixth rod-shaped member 14 and the eighth rod-shaped member 16 is shorter than the length of the lower surface of the sixth rod-shaped member 14 and the eighth rod-shaped member 16. An opening side gap 27 (upper through-hole) that is not blocked by the opening adjustment upper side plate member 26 is formed on the lower surface of the sixth rod-shaped member 14 and the eighth rod-shaped member 16. By changing the position of the opening adjustment upper side plate member 26 relative to the lower surface of the sixth rod-shaped member 14 and the eighth rod-shaped member 16, the position of this opening side gap 27 (upper through-hole) can be set to a position adjacent to the opening surface 21 or the rear side suction plate member 7. As shown in Figures 41 and 42, the space surrounded by the ceiling side member formed by the upper surfaces of the fifth rod-shaped member 13, the sixth rod-shaped member 14, the seventh rod-shaped member 15 and the eighth rod-shaped member 16, the upper side plate member 25, the upper opening surface shielding plate 31, the left side plate member 4 and the right side plate member 5 is the upper side chamber space 24.

[0047] In the flow of intake air in this embodiment, as shown in Fig. 43, air inside the ventilation booth housing 1 is sucked in through the rear suction plate member 7 and the opening side gap 27 (upper through-hole). Air that is not sucked in by the rear suction plate member 7 can be sucked in through the opening side gap 27 (upper through-hole), so air is less likely to leak from the opening surface 21. EXAMPLES

[0048] An eleventh embodiment of the present invention will be described with reference to the drawings. The differences from the above-mentioned ninth embodiment will be described. As shown in Figures 44, 45, and 46, a rear shielding plate 28 is fixed to the upper side of the rear suction plate member 7 of the ventilation booth housing 1 of the first embodiment, and an upper shielding plate 29 is fixed to the rear suction plate member 7 side of the upper suction plate member 8.

[0049] In this embodiment, as shown in Fig. 46, the flow of intake air is such that air inside the ventilation booth housing 1 is sucked into the rear chamber space 23 and the upper chamber space 24 from the area (upper through-hole) adjacent to the lower side of the rear suction plate member 7 and the opening surface 21 of the upper suction plate member 8. This is used when it is necessary to concentrate the suction force at a low position, such as when painting a low object to be painted. As a modification of this embodiment, the positions of rear side shielding plate 28 and upper side shielding plate 29 may be changed relative to rear side suction plate member 7 and upper side suction plate member 8, so that the area that takes in air without being shielded is located above rear side suction plate member 7 and in a position of upper side suction plate member 8 adjacent to rear side suction plate member 7. In this way, in this embodiment, the direction of the flow of intake air can be adjusted by changing the positions of rear side shielding plate 28 and upper side shielding plate 29. EXAMPLES

[0050] A twelfth embodiment of the present invention will be described with reference to the drawings. The differences from the above-mentioned ninth embodiment will be described. As shown in Fig. 52 and Fig. 53, the differences from the ventilation booth housing 1 of the first embodiment are that the ceiling side member is a ceiling side plate member 30-1 with an opening for mounting a suction fan, the back plate member is a back plate member 6-1 with an opening for mounting a suction fan, and the suction fan main body 2 is fixed to the back plate member 6-1 with an opening for mounting a suction fan.

[0051] In this embodiment, the intake fan main body 2 draws in air from the rear side. In this embodiment, as shown in Figs. 54 and 55, the air inside the ventilation booth housing 1 flows into the rear chamber space 23 through the through-hole of the rear intake plate member 7, is drawn into the rear intake fan main body 2, and is discharged to the outside of the ventilation booth housing 1. The air inside the ventilation booth housing 1 flows into the upper chamber space 24 through the through-hole of the upper intake plate member 8, is drawn into the rear intake fan main body 2 through the rear chamber space 23, and is discharged to the outside of the ventilation booth housing 1. Since the rear intake plate member 7, the rear chamber space 23, and the rear intake fan main body 2 are close to each other, the air drawn in from the rear intake plate member 7 is efficiently discharged to the outside of the ventilation booth housing 1.

[0052] The present invention is not limited to the above embodiment, and may be configured as follows. In Fig. 45, Fig. 46, and Fig. 47, the rear shielding plate 28 and the upper shielding plate 29 may be changed in position relative to the rear suction plate member 7 and the upper suction plate member 8, so that the area where air is sucked in without being shielded may be located at the top of the rear suction plate member 7 or at a position of the upper suction plate member 8 adjacent to the rear suction plate member 7. Also, the through-holes of the rear suction plate member 7 and the upper suction plate member 8 may be provided only in a part of the surface, for example, at the bottom of the rear suction plate member 7 and at a position adjacent to the opening surface 21 of the upper suction plate member 8, and the direction of the flow of the intake air may be adjusted by sucking in air from the part where the through-holes are provided. [Industrial Applicability]

[0053] The dust and odors in the ventilation booth are sucked in through the rear suction plate member with multiple penetrations that do not need to be tilted inside the ventilation booth, introduced into the rear chamber space, where the moisture is dried and then discharged outside the ventilation booth, making it suitable for applications such as painting large objects that require a large painting space and a large amount of paint to be sprayed.It can also be used for cutting objects using a cutting machine that requires a large working space. [Explanation of symbols]

[0054] 1. Enclosure for ventilation booth 2 Intake fan body 3 Installation surface side plate member (side member, installation surface portion) 4 Left side plate member (side member) 5 Right side plate member (side member) 6 Back plate member 6-1 Back panel member with intake fan mounting opening 7 Rear suction plate member 7-1 Back side gap 8 Upper suction plate member 9 First rod-shaped member (frame member) 10 Second rod-shaped member (frame member) 11 Third rod-shaped member (frame member) 12 Fourth rod-shaped member (frame member) 13 5th rod-shaped member (frame member, ceiling side member) 14 6th rod-shaped member (frame member, ceiling side member) 15 7th rod-shaped member (frame member, ceiling side member) 16 No. 8 rod-shaped member (frame member, ceiling side member) 17 9th rod-shaped member (frame member) 18 10th rod-shaped member (frame member) 19 11th rod-shaped member (frame member) 20 12th rod-shaped member (frame member) 20-1 Ceiling side members 21 Opening 22 Intake fan mounting opening 23 Rear chamber space 24 Upper chamber space 25 Top partition plate 26 Upper side plate member for adjusting opening (upper side partition plate) 27 Opening side gap 28 Rear side shielding plate 29 Top side shielding plate 30 Ceiling side members 30-1 Ceiling side panel member 31 Upper opening shield plate 100 Ventilation Booth

Claims

1. A ventilation booth housing comprising: a rectangular opening; a rectangular back panel member facing the opening; and four side panels connecting four sides of the opening surface to four sides of the back panel member, the side panels being an installation surface side panel member providing an installation surface portion, a ceiling side panel member positioned opposite the installation surface side panel member, and a left panel member and a right panel member connecting the installation surface side panel member and the ceiling side panel member, the ventilation booth housing comprising: an intake fan mounting opening provided in the ceiling side panel member or the back panel member; A top side partition plate is provided between the ceiling side member and the installation side plate member, a rear side suction plate member having a plurality of rear side through-holes provided between the rear plate member and the opening surface, and an opening surface upper shielding plate is provided above the opening, A ventilation booth housing characterized in that a rear chamber space surrounded by the rear panel member, the rear suction panel member, the left panel member, the right panel member and the upper opening shielding plate is connected to an upper chamber space surrounded by the ceiling side member, the upper partition panel, the left panel member and the right panel member, and an upper through-hole is provided above the rear suction panel member.

2. The ventilation booth housing according to claim 1, characterized in that the upper through-hole is a rear-side gap provided between one of the four sides of the rear-side suction plate member that faces the upper-side partition plate and the upper-side partition plate.

3. 3. The ventilation booth housing according to claim 1, wherein the upper penetration portion is an opening-side gap provided between the opening surface upper shielding plate and the upper surface side partition plate.

4. 4. The ventilation booth housing according to claim 1, wherein the upper penetration portion is an upper suction plate member having a plurality of upper penetration portions.

5. A ventilation booth enclosure as described in claim 4, characterized in that the total rear area, calculated by adding up the areas of the through-holes of the rear suction plate member, is the same as the total top area, calculated by adding up the areas of the through-holes of the top suction plate member.

6. A ventilation booth enclosure as described in claim 4, characterized in that the total rear side area, which is the sum of the areas of the through-holes of the rear side suction plate member, is larger than the total top side area, which is the sum of the areas of the through-holes of the top side suction plate member.

7. A ventilation booth housing as described in claim 4, characterized in that the total rear side area obtained by adding up the areas of the through-holes of the rear side suction plate member is smaller than the total top side area obtained by adding up the areas of the through-holes of the top side suction plate member.

8. 8. The ventilation booth housing according to claim 1, wherein the left side plate member, the right side plate member, or the upper opening shielding plate is transparent.

9. 9. The ventilation booth housing according to claim 1, wherein a transparent portion is provided in at least a part of the left side plate member, the right side plate member, or the upper opening surface shielding plate.

10. The ventilation booth housing according to any one of claims 1 to 9, characterized in that a fan body to be attached to the suction fan mounting opening can be inserted and placed inside the ventilation housing from the suction fan mounting opening or the opening surface.

11. 11. The ventilation booth housing according to claim 1, wherein the hexahedron of the ventilation housing is formed by a frame member having 12 sides formed by rod-shaped members, the installation surface side plate member is fixed to the four rod-shaped members that constitute the installation surface side of the hexahedron, the back plate member, the left side plate member and the right side plate member are fixed to the rod-shaped members that constitute three sides of the hexahedron extending from the installation surface side of the hexahedron toward the ceiling, the ceiling side member is the four rod-shaped members that constitute the ceiling side surface opposite the installation surface side of the hexahedron, the intake fan mounting opening is a space surrounded by the four rod-shaped members that constitute the remaining one surface to which the back plate member, the left side plate member and the right side plate member are not fixed, of the four surfaces of the hexahedron extending from the installation surface side of the hexahedron toward the ceiling.

12. A ventilation booth comprising the ventilation booth housing according to any one of claims 1 to 11 and a suction fan attached thereto.

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