Spray booth

Abstract

To provide a spray booth capable of quickly and easily replacing a filter 6 and avoiding the discharge of atomized particles generated in spray work to the outside.SOLUTION: A front lattice part 3 having a plurality of columnar parts 31 extending in the vertical direction is provided on the inner surface of an opening part 211 of a body 2. The cover 4 is provided with a rear lattice part 5 having a plurality of columnar parts 51 extending in the vertical direction which can be stored inside the body 2. In a state where the cover 4 is attached to the opening 211 of the main body 2, each of the columnar portions 51 of the rear lattice portion 5 is accommodated inside the main body 2 behind each of the columnar portions 31 of the front lattice portion 3. The columnar portions 31 of the front lattice portion 3 and the columnar portions 51 of the rear lattice portion 5 are alternately arranged. The filters 6 are arranged in a wave shape between the respective columnar portions 31 of the front lattice portion 3 and the respective columnar portions 51 of the rear lattice portion 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a spray booth, and more particularly to a portable spray booth that has a replaceable filter housed within its body. [Background technology]

[0002] Conventionally, Patent Document 1 describes a spray booth in which a flow passage is provided between an intake port and an exhaust fan, the flow passage is formed in a maze shape, multiple protrusions are provided alternately on both sides of the inner wall surface of the flow passage, an absorbent (filter) is provided on the inner wall surface of the flow passage, and multiple pleated convex portions are provided by the absorbent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-230856 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional spray booth described above, in a configuration in which pleated convex portions are provided by an adsorbent (corresponding to the filter of the present application), the adsorbent is bent and fixed by passing it sequentially through pins in a manner similar to threading, which makes it difficult to quickly replace the adsorbent.

[0005] Furthermore, in the conventional spray booths, there is a risk that some of the atomized particles of paint or the like generated during the spraying operation will not be adsorbed by the adsorbent, but will pass through the labyrinthine circulation passages and be directly discharged to the outside by the exhaust fan.

[0006] The present invention aims to solve the above-mentioned problems of the conventional spray booth by providing a spray booth in which the filter can be replaced quickly and easily and in which the mist particles generated during spraying operations can be prevented from being discharged to the outside. [Means for solving the problem]

[0007] A first aspect of the present invention is A box-shaped body and a cover that is detachable from the opening of the main body; a filter that is replaceably housed inside the rear of the opening of the main body; A spray booth comprising: a front lattice portion having a plurality of pillar portions extending in the vertical direction is provided on the inner surface of the opening of the main body; the cover includes a rear lattice portion having a plurality of pillar portions extending in the vertical direction and capable of being housed inside the main body, With the cover attached to the opening of the main body, Each pillar of the rear grid section is housed inside the main body behind each pillar of the front grid section, the columnar portions of the front grid section and the columnar portions of the rear grid section are alternately arranged, The spray booth is characterized in that the filter is arranged in a wave shape between each pillar portion of the front grid portion and each pillar portion of the rear grid portion.

[0008] According to the spray booth of the first aspect, the filter can be replaced quickly and easily, and moreover, it is possible to prevent atomized particles generated during spraying from being discharged to the outside.

[0009] A second aspect of the present invention is the spray booth of the first aspect, an upper wall is provided above the opening of the main body; A partition wall is provided at a position spaced apart from the lower surface of the upper wall of the main body, The partition wall defines an upper portion of the opening of the main body, an upper end of each pillar portion of the front lattice portion is fixed to a lower surface of the partition wall; The spray booth is characterized in that an air passage is formed between the upper surface of the partition wall and the lower surface of the upper wall, which air passage can communicate with the interior behind the opening of the main body.

[0010] According to the spray booth of the second aspect, the interior of the main body behind the opening where the filter is housed (filter housing section) and the air passage can be arranged one above the other, resulting in a simple structure and making the entire main body compact.

[0011] A third aspect of the present invention is a spray booth according to the second aspect, characterized in that, when the cover is attached to the opening of the main body, the rear ends of the rear grid sections are positioned forward of the rear ends of the partition walls.

[0012] The spray booth of the third aspect further prevents some of the mist particles of paint, etc., generated during spraying from being discharged to the outside through the exhaust fan. If the rear ends of the rear lattice sections of the cover are positioned rearward of the rear ends of the partition walls when the cover is attached to the opening of the main body, the filters may protrude rearward from the rear ends of the partition walls, causing some of the mist particles of paint, etc., generated during spraying to leak between the rear lattice sections and the filters and be discharged to the outside through the air passage.

[0013] A fourth aspect of the present invention is the spray booth of the third aspect, a rear wall is provided on the opposite side of the opening of the body; a support portion for supporting the main body with the opening facing upward when the main body is placed with the opening facing upward during replacement of the filter is provided on a rear surface of a rear wall of the main body; The spray booth is characterized in that a vent hole communicating with the air passage is formed through the upper wall, and an exhaust fan is provided at the vent hole.

[0014] According to the spray booth of the fourth aspect, the filter can be replaced quickly and easily, and the length of the main body can be set short, making it easy to secure a place to install the spray booth.

[0015] A fifth aspect of the present invention is the spray booth of any one of the first to fourth aspects, The filter is made of a single strip-shaped sheet, This spray booth is characterized in that, when the cover is attached to the opening of the main body, the filter has a deformed portion that is deformed into a wave shape and non-deformed portions formed on both sides of the deformed portion, and the non-deformed portions are sandwiched front and back between the main body and the cover.

[0016] According to the spray booth of the fifth aspect, filter replacement can be performed even more quickly and easily. [Effects of the Invention]

[0017] According to the spray booth of the present invention, the filter can be replaced quickly and easily, and furthermore, the mist particles generated during the spraying operation can be prevented from being discharged to the outside. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing an embodiment of a spray booth of the present invention. [Figure 2] FIG. 2 is a front view of FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] 2 is a perspective view of the main body of FIG. 1. The dashed double-dashed line represents the filter. [Figure 5] FIG. 2 is a front view of the main body of FIG. 1. [Figure 6] 6 is a cross-sectional view of the main body taken along line BB in FIG. 5. [Figure 7] 6 is a cross-sectional view of the main body taken along line CC in FIG. 5. [Figure 8] FIG. 2 is a view of the main body of FIG. 1 as seen from below. [Figure 9] FIG. 2 is a perspective view of the cover of FIG. 1 as seen from the front side. [Figure 10] FIG. 2 is a perspective view of the cover of FIG. 1 as seen from the rear side. [Figure 11] 1A and 1B are diagrams showing the filter used in the present embodiment before deformation, as viewed from the front or rear. [Figure 12]1A and 1B are diagrams showing a locking member in this embodiment, where (a) is a plan view, (b) is a front view and a rear view, (c) is a right side view and a left side view, (d) is a bottom view, and (e) is a perspective view. [Figure 13] 1A and 1B are diagrams showing the locking holes in this embodiment, where (a) is an oblique view of the locking holes in the main body and cover as seen from the front, (b) is an oblique view of the locking holes in the main body as seen from the rear, and (c) is a diagram of the rear of the locking holes in the main body explaining the rotational movement of the locking member. DETAILED DESCRIPTION OF THE INVENTION

[0019] A spray booth 1 according to an embodiment of the present invention is shown in FIGS. Figures 1 to 3 show the entire spray booth. Figures 4 to 8 show the main body 2. Figures 9 and 10 show the cover 4. Figure 11 shows the filter 6. Figure 12 shows the locking member 8. Figure 13 shows the locking holes 215, 46.

[0020] In this invention, "front" refers to the opening side of the main body and the opening side of the cover, and "rear" refers to the opposite side. In this invention, "up" refers to the direction away from the placement surface when the spray booth is placed on the placement surface and used, and "down" refers to the opposite side. In this invention, "left" refers to the "left" direction when the openings of the main body and the cover are viewed from the front, and "right" refers to the opposite side.

[0021] The spray booth 1 of this embodiment includes a box-shaped main body 2, a cover 4 that can be attached to and detached from an opening 211 of the main body 2, and a filter 6 that can be replaced and housed within the main body 2 (see FIGS. 1 to 11).

[0022] Main unit The main body 2 is a hollow box made of synthetic resin and includes a front wall 21, a rear wall 22, an upper wall 23, a lower wall 24, a left side wall 25, and a right side wall 26. The front wall 21 has an opening 211 (air intake). A replaceable filter 6 is housed in the interior (filter housing) of the main body 2 behind the opening 211 (see FIGS. 4 to 8). Handles 251 and 261 protrude from the outer upper surfaces of the right side wall 26 and the left side wall 25 of the main body 2. The handles 251 and 261 consist of ribs that extend in the front-rear direction and have an L-shaped cross section, and have a recessed groove that opens downward. The length of the front wall 21 in the left-right direction is set to 390 mm. The left side wall 25 and the right side wall 26 each have a vertical length of 240 mm and a front-rear length of 150 mm.

[0023] ·Front wall The front wall 21 has an opening 211 (see FIGS. 4 to 8). Around the opening 211 of the front wall 21, there are an inclined wall 212 that slopes forward as it goes upward, a flat frame-like wall 213 formed below the inclined wall 212, and a flat upper end wall 214 formed above the inclined wall 212.

[0024] The inclined wall 212 is provided above the opening 211. The planar frame-shaped wall 213 is formed in a U-shape to surround the opening 211. The planar frame-shaped wall 213 is formed at the front end of the left side wall 25, the front end of the right side wall 26, and the front end of the bottom wall 24. The left side of the planar frame-shaped wall 213 protrudes leftward from the front end of the left side wall 25 in a flange-like manner. The right side of the planar frame-shaped wall 213 protrudes rightward from the front end of the right side wall 26 in a flange-like manner. The lower side of the planar frame-shaped wall 213 protrudes downward from the front end of the bottom wall 24 in a flange-like manner. The planar frame-shaped wall 213 and the planar top wall 214 have surfaces perpendicular to the front-to-rear direction. Locking holes 215 are formed through the left side of the frame-shaped wall 213, the right side of the frame-shaped wall 213, and the top wall 214.

[0025] Partition walls A partition wall 27 is formed inside the main body 2 at a position spaced a certain distance below the lower surface (inner surface) of the top wall 23 of the main body 2 (see FIG. 7). The partition wall 27 has a shape that extends in the front-to-rear and left-to-right directions. The partition wall 27 extends rearward from the front end of the opening 211. The front end of the partition wall 27 is connected to the lower end of the inclined wall 212 of the front wall 21. The left end of the partition wall 27 is connected to the left side wall 25. The right end of the partition wall 27 is connected to the right side wall 26. The opening 211 of the main body 2 and the filter accommodating section (the part of the main body 2 behind the opening 211 where the filter 6 is accommodated) are formed by the partition wall 27, the left side wall 25, the right side wall 26, and the bottom wall 24.

[0026] Communication port, air passage The rear end of partition wall 27 is not connected to rear wall 22 of main body 2, and a certain distance is maintained between the rear end of partition wall 27 and the front surface (inner surface of rear wall 22) of rear wall 22 of main body 2 (see FIGS. 6 and 7). As a result, a communication opening 2a is formed between the rear end of partition wall 27 and the front surface of rear wall 22 of main body 2. An air passage 2b is formed between the upper surface of partition wall 27 and the lower surface of upper wall 23 of main body 2. Air passage 2b communicates with the filter accommodating section and opening 211 of main body 2 via communication opening 2a.

[0027] ·Front lattice part A front grid section 3 is provided on the inner surface of the opening 211 of the main body 2 (the inner surface near the open end of the main body 2 or the inner surface at the open end of the main body 2). The front grid section 3 has a plurality of columnar sections 31 extending in the vertical direction. The upper end of each columnar section 31 of the front grid section 3 is fixed to the lower surface near the front end of the partition wall 27. The lower end of each columnar section 31 of the front grid section 3 is fixed to the upper surface near the front end of the bottom wall 24. The columnar sections 31 of the front grid section 3 are arranged at equal intervals in the left-right direction. The front surface of each columnar section 31 of the front grid section 3 has a mountain shape (a cross-sectional shape that becomes wider toward the rear) (see FIG. 6). Specifically, the front surface of each columnar section 31 of the front grid section 3 has a peak (ridge line) with both inclined surfaces that are edge-shaped or convex-curved. This reduces the sliding resistance between the filter 6 and each of the columnar portions 31 when the filter is deformed, and allows the filter 6 to be easily deformed into a wave shape during the process of attaching the cover 4 to the main body 2.

[0028] Exhaust fan An air vent 231 is provided through the top wall 23 of the main body 2 (see Figure 7). The air vent 231 opens the air passage 2b. An exhaust fan 7 is attached to the air vent 231. Air inside the main body 2 is exhausted to the outside through an exhaust port 71 of the exhaust fan 7 (see Figure 1). The exhaust fan 7 is a sirocco fan unit consisting of a motor and a sirocco fan. It is also preferable that an operating unit for adjusting the rotation speed of the motor be provided on the exterior of the main body 2 or separately from the main body 2. By operating the operating unit, the user can adjust the motor rotation speed to any value, thereby enabling the appropriate exhaust volume to be set according to the spraying operation or enabling quieter spraying, such as at night.

[0029] Support for spraying A plurality of ribs 241 (supporting portions) extending in the front-rear direction are formed on the lower surface of the lower wall 24 of the main body 2 (see FIGS. 4 and 8). When the main body 2 is placed on a placement surface during spraying, the ribs 241 come into contact with the placement surface, and the main body 2 is stably supported by the ribs 241. A notch 241a is formed in the front end of each rib 241.

[0030] Support for filter replacement A flat support portion 221 is formed on the rear surface of the rear wall 22 of the main body 2 (see FIGS. 3, 6, and 7). When the main body 2 is placed on a placement surface with the opening 211 of the main body 2 facing upward during filter 6 replacement, the support portion 221 of the rear wall 22 supports the main body 2 with the opening 211 of the main body 2 facing upward (see FIG. 4). The support portion 221 of the rear wall 22 may be configured to support the main body 2 with the opening 211 of the main body 2 facing upward, and may be a plurality of protrusions such as ribs other than a flat surface.

[0031] ·cover The cover 4 has an opening 41 (see FIGS. 9 and 10). Similar to the front wall 21 of the main body 2, the cover 4 is provided around the opening 41 with an inclined wall 42 that slopes forward as it goes upward, a flat frame-like wall 43 formed below the inclined wall 42, and a flat upper end wall 44 formed above the inclined wall 42. The inclined wall 42 of the cover 4 is provided above the opening 41 of the cover 4.

[0032] ·Peripheral wall The cover 4 further includes a peripheral wall 45 that surrounds the inclined wall 42, the frame-shaped wall 43, and the top wall 44. The peripheral wall 45 includes an upper wall 451, a left side wall 452, a right side wall 453, and a lower wall 454. The upper wall 451 extends in an inclined plane that slopes forward as it extends upward, and the left side wall 452, the right side wall 453, and the lower wall 454 extend in the front-to-rear direction. The lower wall 454 of the peripheral wall 45 includes a plate-shaped lower edge portion 454a that protrudes rearward from the lower frame-shaped wall 43. When the cover 4 is attached to the opening 211 of the main body 2, the lower edge portion 454a of the peripheral wall 45 engages with the notches 241a at the front ends of the ribs 241 of the bottom wall 24 of the main body 2. The length of the front end of the peripheral wall 45 in the left-right direction is set to 390 mm, and the length of the front end of the peripheral wall 45 in the up-down direction is set to 300 mm.

[0033] Frame wall The flat frame wall 43 of the cover 4 is formed in a U-shape. When the cover 4 is attached to the opening 211 of the main body 2, the rear surface of the flat frame wall 43 of the cover 4 abuts against the front surface of the flat frame wall 213 of the main body 2. When the cover 4 is attached to the opening 211 of the main body 2, the rear surface of the inclined wall 42 of the cover 4 abuts against the front surface of the inclined wall 212 of the main body 2. When the cover 4 is attached to the opening 211 of the main body 2, the rear surface of the flat top wall 44 of the cover 4 abuts against the front surface of the flat top wall 214 of the main body 2. The flat frame wall 43 and the flat top wall 44 of the cover 4 are formed with surfaces perpendicular to the front-to-rear direction. Locking holes 46 are formed through the left side of the frame wall 43 of the cover 4, the right side of the frame wall 43 of the cover 4, and the top wall 44 of the cover 4.

[0034] ·Upper edge, lower edge A plate-shaped upper edge 411 that protrudes rearward is formed above the open end of the cover 4 (see FIG. 10). The upper edge 411 extends rearward from the rear end (lower end) of the inclined wall 42 that has an inclined surface shape. A plate-shaped lower edge 412 that protrudes rearward is formed below the open end of the cover 4 (see FIG. 10). The lower edge 412 extends rearward from the upper end of the lower frame-shaped wall 43.

[0035] ·Rear lattice part A rear lattice portion 5 protrudes from the rear of the frame wall 43 of the cover 4 (see FIG. 10). The rear lattice portion 5 is composed of a plurality of pillar portions 51 extending in the vertical direction, a plurality of upper guide pieces 52 protruding rearward, and a plurality of lower guide pieces 53 protruding rearward. The upper ends of the pillar portions 51 and the rear ends of the upper guide pieces 52 are fixed. The lower ends of the pillar portions 51 and the rear ends of the lower guide pieces 53 are fixed.

[0036] A plate-shaped upper guide piece 52 extends integrally behind the upper edge 411 of the opening end of the cover 4 (see FIG. 10). A plate-shaped lower guide piece 53 extends integrally behind the lower edge 412 of the opening end of the cover 4 (see FIG. 10).

[0037] The vertical length H1 of the rear lattice section 5 (i.e., the vertical distance between the upper surface of each upper guide piece 52 and the lower surface of each lower guide piece 53; see Figure 10) is set to be approximately equal to the vertical height H2 of the inner surface of the main body 2 behind the opening 211 of the main body 2 (i.e., the vertical distance between the lower surface of the partition wall 27 and the upper surface of the lower wall 24; see Figure 7). As a result, during the process of attaching the cover 4 to the opening 211 of the main body 2, the upper surface of each upper guide piece 52 slides against the lower surface of the partition wall 27, and the lower surface of each lower guide piece 53 slides against the upper surface of the lower wall 24 of the main body 2 without any vertical rattle. The vertical length H1 of the rear lattice section 5 and the vertical height H2 of the inner surface of the main body 2 are set to 183 mm.

[0038] The left-right width dimension W1 (maximum width dimension, see FIG. 10) of each guide piece (upper guide piece 52, lower guide piece 53) and the left-right width dimension W2 (maximum width dimension, see FIG. 10) of each pillar-shaped portion 51 of the rear lattice unit 5 are set smaller than the gap W3 (minimum gap value, see FIG. 5) between each pillar-shaped portion 31 of the front lattice unit 3 of the main body 2. This allows each guide piece (upper guide piece 52, lower guide piece 53) and each pillar-shaped portion 51 of the rear lattice unit 5 to be inserted into the gap between each pillar-shaped portion 31 of the front lattice unit 3. At the same time, the width W4 (maximum width dimension, see FIG. 5) of each pillar-shaped portion 31 of the front lattice unit 3 of the main body 2 is set smaller than the gap W5 (minimum gap value, see FIG. 10) between each rear lattice unit 5 of the cover 4. This allows the pillars 31 of the front lattice section 3 of the main body 2 to be inserted into the gaps between the rear lattice sections 5 of the cover 4. The width dimension W1 is set to 25 mm, the width dimension W2 is set to 14 mm, and the gap W3 is set to 30 mm. The width dimension W4 is set to 14 mm, and the gap W5 is set to 20 mm.

[0039] The pillar portions 51 of the rear lattice unit 5 are arranged at equal intervals in the left-right direction. The guide pieces (upper guide pieces 52, lower guide pieces 53) are also arranged at equal intervals in the left-right direction. The left-right spacing pitch of the pillar portions 51 of the rear lattice unit 5 is set to be equal to the left-right spacing pitch of the pillar portions 31 of the front lattice unit 3. The spacing pitch is set to 45 mm.

[0040] The rear surface of each of the columnar portions 51 of the rear grid portion 5 has a mountain shape (a cross-sectional shape that becomes wider toward the front). Specifically, the rear surface of each of the columnar portions 51 of the rear grid portion 5 has a top (ridge portion) with edge-shaped inclined surfaces on both sides or convexly curved inclined surfaces on both sides. This reduces the sliding resistance between the filter 6 and each columnar portion 51 when the filter is deformed, and allows the filter 6 to easily deform into a wave-like shape during the process of attaching the cover 4 to the main body 2.

[0041] Filters The filter 6 is made of a sheet-like porous material (e.g., nonwoven fabric, mesh material, paper, cotton, etc.) (Figure 11). The filter 6 is made of a single strip-shaped sheet, and its width is set to be approximately equal to the vertical length of the rear lattice section 5 or the vertical height inside the main body 2 behind the opening 211 of the main body 2, or slightly smaller than the vertical length of the rear lattice section 5 or the vertical height inside the main body 2 behind the opening 211 of the main body 2. The longitudinal dimension of the filter 6 is set to a length that allows it to be sandwiched between the front open end of the main body 2 and the rear open end of the cover 4 when it is set in the spray booth. The width of the filter 6 is set to 180 mm, and the longitudinal dimension is set to 1060 mm.

[0042] Filter transformation By attaching the cover 4 to the opening 211 of the main body 2, the pillars 51 and guide pieces of the rear lattice section 5 of the cover 4 are inserted into the gaps between the pillars 31 of the front lattice section 3 of the main body 2. At the same time, the pillars 51 of the rear lattice section 5 are arranged behind the pillars 31 of the front lattice section 3, and the pillars 31 of the front lattice section 3 and the pillars 51 of the rear lattice section 5 are arranged alternately in the front-rear and left-right directions. The filter 6 is arranged between the pillars 31 of the front lattice section 3 and the pillars 51 of the rear lattice section 5, deformed in a wavy (zigzag) shape (see FIG. 3 ). With the cover 4 attached to the opening 211 of the main body 2, the rear end of each rear lattice section 5 is located forward of the rear end of the partition wall 27. The length H3 in the front-rear direction of the partition wall 27 (the length from the front surface of the upper frame wall 213 to the rear end of the partition wall 27) is set to 90 mm (see FIG. 6). The length H4 in the front-rear direction of the rear lattice unit 6 (the length from the rear surface of the frame wall 43 to the rear end of the rear lattice unit 6) is set to 80 mm (see FIG. 3).

[0043] The filter 6 has a deformed portion 61 that is deformed into a wave shape and non-deformed portions 62 formed on both sides of the deformed portion 61. The non-deformed portion 62 of the filter 6 is sandwiched between the upper surface of the left frame-shaped wall 213 of the main body 2 and the lower surface of the left frame-shaped wall 43 of the cover 4, and is also sandwiched between the upper surface of the right frame-shaped wall 213 of the main body 2 and the lower surface of the right frame-shaped wall 43 of the cover 4 (see FIG. 3 ). In other words, the filter 6 is sandwiched from the front and rear between the flat wall portions of the cover 4 and the main body 2.

[0044] Locking hole The locking holes 215 of the main body 2 (locking holes 215 of the left frame-shaped wall 213 of the main body 2, locking holes 215 of the right frame-shaped wall 213 of the main body 2, and locking holes 215 of the top end wall 214 of the main body 2; see Figures 4 and 5) and the locking holes 46 of the cover 4 (locking holes 46 of the left frame-shaped wall 43 of the cover 4, locking holes 46 of the right frame-shaped wall 43 of the cover 4, and locking holes 46 of the top end wall 44 of the cover 4; see Figures 9 and 10) are aligned, and locking members 8 (e.g., screws, pins, etc.) are inserted into the locking holes 215 of the main body 2 and the locking holes 46 of the cover 4, thereby joining the main body 2 and the cover 4.

[0045] Each of the locking holes 215 of the main body 2 and each of the locking holes 46 of the cover 4 has a circular hole 215a-461 and a slit 215b-462 extending in the vertical direction on both the upper and lower sides of the circular hole 215a-461 (see FIG. 13). Each of the locking holes 215 of the main body 2 and each of the locking holes 46 of the cover 4 have the same shape. A restricting wall portion 215c is provided on the rear surface of the locking hole 215 of the main body 2 so as to protrude rearward. The restricting wall portion 215c comes into contact with the locking protrusion 84 (plate-shaped rib) of the locking member 8, thereby restricting the rotation of the locking member 8.

[0046] ·Locking member The locking member 8 includes a shaft portion 81 having a circular cross section, a disk-shaped flange portion 82 connected to the rear end of the shaft portion 81, and a knob portion 83 made of a plate piece protruding from the front of the flange portion 82 (see FIG. 12). The rear end of the shaft portion 81 is formed into a pointed shape. Locking protrusions 84 protrude from both radial sides of the outer surface of the middle portion of the shaft portion 81. The locking protrusions 84 can be inserted into the slits 215b·462 of the locking holes 215·46. After the shaft portion 81 of the locking member 8 is inserted into the circular holes 215a·461 of the locking holes 215·46 and the locking protrusions 84 are inserted into the slits 215b·462, the knob portion 83 is rotated 90 degrees, and the locking member 8 is locked in a state where it is prevented from slipping out of the engagement hole. When the knob portion 83 is rotated 90 degrees, the restricting wall portion 215c on the rear surface of the locking hole 215 of the main body 2 abuts against the locking protrusion 84 of the locking member 8, restricting the rotation of the locking member 8 and reliably maintaining the proper locking state between the locking member 8 and the locking hole 215.

[0047] When the locking members 8 are locked in the locking holes 215 and 46, the main body 2 and the cover 4 are sandwiched between the rear surface of the flange 82 and the locking projection 84. Specifically, the top end wall 214 of the main body 2 and the top end wall 44 of the cover 4 are sandwiched between the rear surface of the flange 82 and the locking projection 84, and the frame-shaped wall 213 of the main body 2 and the frame-shaped wall 43 of the cover 4 are also sandwiched between the rear surface of the flange 82 and the locking projection 84. Each locking member 8 has the same shape. Each locking member 8 can be locked in the respective locking holes 215 of the main body 2 and the respective locking holes 46 of the cover 4.

[0048] Filter installation The installation of the filter 6 after the main body 2, cover 4, and filter 6 are separated will be described below. First, the main body 2 is placed with the opening 211 facing upward. Next, a single strip-shaped filter 6 is placed on the front surface of the front grid section 3 of the main body 2 and on the front surface of the frame wall 213 (see FIG. 4). After that, the cover 4 is attached to the opening 211 of the main body 2, and each of the columnar sections 51 and each of the guide pieces 52 and 53 of the rear grid section 5 of the cover 4 is inserted into the gaps between each of the columnar sections 31 of the front grid section 3. This causes the filter 6 to be deformed into a wavy shape. At the same time, the remaining portions of the filter 6 on both sides that are not deformed into a wavy shape are clamped between the open ends of the main body 2 and the open ends of the cover 4. Specifically, both sides (non-deformed portions 62) of deformed portion 61 of filter 6, which is deformed into a wave shape, are sandwiched between frame-shaped wall 213 (flat wall portion having locking holes 215) of main body 2 and frame-shaped wall 43 (flat wall portion having locking holes 46) of cover 4. Thereafter, locking members 8 are inserted into locking holes 215 of main body 2 and locking holes 46 of cover 4, and main body 2 and cover 4 are joined together.

[0049] Filter replacement With the cover 4 attached to the opening 211 of the main body 2, the opening 211 of the main body 2 is placed with the opening 211 facing upward, and after removing each of the locking members 8 from each of the locking holes 215, the cover 4 is removed from the opening 211 of the main body 2. Thereafter, the filter 6 is removed from inside the main body 2 and replaced with a new filter 6.

[0050] The spray booth 1 of this embodiment is a spray booth comprising a box-shaped main body 2, a cover 4 that is detachable from an opening 211 of the main body 2, and a filter 6 that is replaceably housed inside the main body 2 at the rear of the opening 211. A front grid section 3 having a plurality of pillars 31 extending in the vertical direction is provided on the inner surface of the opening 211 of the main body 2, the cover 4 is provided with a rear grid section 5 having a plurality of pillars 51 extending in the vertical direction that can be housed inside the main body 2, and when the cover 4 is attached to the opening 211 of the main body 2, the pillars 51 of the rear grid section 5 are housed inside the main body 2 behind the pillars 31 of the front grid section 3, the pillars 31 of the front grid section 3 and the pillars 51 of the rear grid section 5 are arranged alternately, and the filter 6 is arranged in a wave pattern between the pillars 31 of the front grid section 3 and the pillars 51 of the rear grid section 5. As a result, in the spray booth 1 of this embodiment, the filter 6 can be replaced quickly and easily, and moreover, it is possible to prevent mist particles generated during spraying work from being discharged to the outside.

[0051] In the spray booth 1 of this embodiment, an upper wall 23 is provided above the opening 211 of the main body 2, and a partition wall 27 is provided at a position spaced a certain distance below the lower surface of the upper wall 23 of the main body 2, the upper part of the opening 211 of the main body 2 is formed by the partition wall 27, the upper ends of the columnar portions 31 of the front grid unit 3 are fixed to the lower surface of the partition wall 27, and an air passage 2b that can communicate with the interior behind the opening 211 of the main body 2 is formed between the upper surface of the partition wall 27 and the lower surface of the upper wall 23. As a result, the spray booth 1 of this embodiment can have a simple structure in which the interior of the main body 2 behind the opening 211 where the filter 6 is housed (filter housing section) and the air passage 2b are arranged one above the other, and the entire main body 2 can be made compact.

[0052] In the spray booth 1 of this embodiment, with the cover 4 attached to the opening 211 of the main body 2, the rear end of each of the rear grid sections 5 is positioned forward of the rear end of the partition wall 27. This makes it possible to further prevent some of the atomized particles of paint and the like generated during spraying from being discharged to the outside through the exhaust fan 7.

[0053] In the spray booth 1 of this embodiment, a rear wall 22 is provided on the side opposite the opening 211 of the main body 2, and a support part 221 is provided on the rear surface of the rear wall 22 of the main body 2 for supporting the main body 2 with the opening 211 of the main body 2 facing upward when the main body 2 is placed with the opening 211 of the main body 2 facing upward during replacement of the filter 6, and an air vent 231 communicating with the air passage 2b is formed through the top wall 23, and an exhaust fan 7 is provided in the air vent 231. As a result, the spray booth 1 of this embodiment allows for quick and easy filter replacement, and the length from front to back of the main body 2 can be set short, making it easy to secure a place to install the spray booth.

[0054] In the spray booth 1 of this embodiment, the filter 6 is made of a single strip-shaped sheet, and when the cover 4 is attached to the opening 211 of the main body 2, the filter 6 has a deformed portion 61 that is deformed into a wave shape and non-deformed portions 62 formed on both sides of the deformed portion 61, and the non-deformed portions 62 are sandwiched at the front and rear between the main body 2 (the flat wall portion having the locking hole 215) and the cover 4 (the flat wall portion having the locking hole 46). This makes it possible to replace the filter 6 more quickly and easily in the spray booth 1 of this embodiment. [Explanation of symbols]

[0055] 1 spray booth 2 Main unit 21 Front wall 211 Opening 212 Slanted wall 213 Frame Wall 214 Upper end wall 215 Locking hole 215a Circular hole 215b Slit 215c Restriction wall 22 Back wall 221 Support part 23 Upper Wall 231 Ventilation 24 Lower wall 241 Rib (support part) 241a Notch 25 Left side wall 251 Handle 26 Right side wall 261 Handle 27 Partition Wall 2a Communication port 2b Air passage 3 Front grid section 31 Columnar part 4 Cover 41 Opening 411 Upper edge 412 Lower edge 42 Slanted wall 43 Frame Wall 44 Top end wall 45 Peripheral wall 451 Upper wall 452 Left side wall 453 Right side wall 454 Lower wall 454a Lower edge 46 Locking hole 461 Circular hole 462 Slit 5 Rear grid section 51 Columnar part 52 Upper guide piece 53 Lower guide piece 6 Filters 61 Deformed part 62 Non-deformed part 7. Exhaust fan 71 Exhaust port 8 Locking member 81 Shaft 82 Tsuba 83 Knob 84 Locking protrusion H1 Vertical length of rear lattice section H2 Vertical height of the body interior H3 Length of partition wall in the front-to-back direction H4 Length of rear lattice section in the front-to-rear direction W1 Width of each guide piece W2 Width of each column of the rear lattice section W3: Gap between each pillar of the front lattice section W4 Width of each column of the front lattice W5: Gap between each pillar of the rear lattice section

Claims

1. A box-shaped body and a cover that is detachable from the opening of the main body; a filter that is replaceably housed inside the rear of the opening of the main body; A spray booth comprising: a front lattice portion having a plurality of pillar portions extending in the vertical direction is provided on the inner surface of the opening of the main body; the cover includes a rear lattice portion having a plurality of pillar portions extending in the vertical direction and capable of being housed inside the main body, With the cover attached to the opening of the main body, Each pillar of the rear grid section is housed inside the main body behind each pillar of the front grid section, the columnar portions of the front grid section and the columnar portions of the rear grid section are alternately arranged, A spray booth characterized in that the filter is arranged in a wave shape between each column portion of the front grid portion and each column portion of the rear grid portion.

2. an upper wall is provided above the opening of the main body; A partition wall is provided at a position spaced apart from the lower surface of the upper wall of the main body, The partition wall defines an upper portion of the opening of the main body, an upper end of each pillar portion of the front lattice portion is fixed to a lower surface of the partition wall; 2. The spray booth according to claim 1, wherein an air passage is formed between the upper surface of the partition wall and the lower surface of the upper wall, the air passage being capable of communicating with the interior of the main body behind the opening.

3. 3. The spray booth according to claim 2, wherein, when the cover is attached to the opening of the main body, the rear end of each of the rear grid sections is positioned forward of the rear end of the partition wall.

4. a rear wall is provided on the opposite side of the opening of the body; a support portion for supporting the main body with the opening facing upward when the main body is placed with the opening facing upward during replacement of the filter is provided on a rear surface of a rear wall of the main body; 4. The spray booth according to claim 3, wherein a vent hole communicating with the air passage is formed through the upper wall, and an exhaust fan is provided at the vent hole.

5. The filter is made of a single strip-shaped sheet, 5. A spray booth as described in any one of claims 1 to 4, characterized in that when the cover is attached to the opening of the main body, the filter has a deformed portion that is deformed into a wave shape and non-deformed portions formed on both sides of the deformed portion, and the non-deformed portions are sandwiched front and back between the main body and the cover.

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