Ventilation booth

Abstract

To provide a ventilation booth which enables spreading of an opening normally provided only on a front surface to a top part to allow a user to take articles thereinto or out therefrom easily.SOLUTION: In a body part 100 having a structure in which panel members 21 to 25 are respectively attached to frames excluding a front surface of a frame connection body forming a framework of a box body, a straightening plate 31 inclined so that each main surface is gradually located closer to a bottom part toward the rear is supported with its upper end surface directed to a position at a predetermined distance away from a front end edge of the top part of the body part 100. A range, which is located at the front relative to a predetermined position near the upper end surface of the straightening plate 31, of the panel member 21 attached to the top part serves as movable pieces 21a, 21b which may separate from both side parts of the body part 100. A top part side opening formed by separating these movable pieces 21a, 21b from both side parts of the body part continues into a front surface side opening 20.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a ventilation booth configured so that a straightening plate member (referred to in this specification as a "straightening plate") is supported inside a box-shaped main body with an open front, with one main surface facing the front opening and so as not to completely divide the space inside the main body, and an exhaust unit is provided at an appropriate position on the outer surface of the main body for sucking air out from the space inside the main body on the other main surface side of the straightening plate. [Background technology]

[0002] Conventional examples of ventilation booths to which the above-mentioned configuration is applied include a booth whose main body is made of metal (see Patent Document 1), and a booth whose main body is configured with a resin panel member attached to a frame connector that forms the skeleton of a box (see Patent Document 2). Both booths are tabletop-sized ventilation booths whose main purpose is to provide ventilation when performing manual work such as painting or cutting.

[0003] In these booths, by operating the exhaust unit, the space connected to the exhaust unit among the spaces separated by the baffle vanes becomes a static pressure chamber due to negative pressure, and an air flow is generated in which the air in the space connected to the opening flows into the static pressure chamber from the places not blocked by the baffle vanes and is exhausted from the exhaust unit. Due to this characteristic, the space from the front where the opening of the main body is located to the baffle vanes can be used as a space for work such as painting and cutting (hereinafter referred to as the "work space"), and odors and dust generated by such work can be exhausted.

[0004] In the ventilation booth described in Patent Document 1, one baffle plate is supported with its main surface inclined so that it approaches the bottom toward the rear. In the ventilation booth described in Patent Document 2, two baffles in a similar inclined position are supported lined up in front and behind with a specified gap between them.

[0005] Furthermore, Patent Document 2 discloses the main body of a ventilation booth whose main materials are a frame connector (referred to as a "frame frame" in the document) consisting of a pair of rectangular frames arranged on the left and right and connected by a number of rod-shaped frames (referred to as "horizontal frames" in the document), and a number of panel members that cover the frames on each side of the frame connector except for the front side. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility Model Registration No. 3219665 [Patent Document 2] JP 2020-79669 A Summary of the Invention [Problem to be solved by the invention]

[0007] The main body of the ventilation booth described in the above Patent Documents 1 and 2 is shaped like a cube, but if the main body were expanded in height, it would be possible to place a 3D printer or equipment for post-processing in the 3D printer modeling process in the work space and expel odors and harmful substances generated while the equipment is operating to the outside.

[0008] However, many of these devices currently on the market are designed so that a cover is placed on the device body from above. This cover is attached to the device body while the device is operating, and is removed when the device stops and the model is removed. For this reason, even if the device with the cover attached can be placed in a ventilation booth, it is highly likely that it will be impossible to remove the cover from the device body inside the booth because the top of the booth will get in the way. Similarly, it is highly likely that it will be impossible to place a cover on a device body that is placed in the booth with the cover removed.

[0009] Therefore, when an apparatus covered with the above cover is operated in a ventilation booth, the apparatus body must be taken out of the booth every time the cover needs to be removed or reinstalled. However, frequent movement of the apparatus, including precision machinery, should be avoided.

[0010] Even when the ventilation booth is used for painting or cutting operations, depending on the size and shape of the items being treated, it may be difficult to load and unload the items through the front opening.

[0011] The present invention has been made with attention to the above-mentioned problems, and its objective is to provide a ventilation booth that makes it easy to take items in and out by configuring the opening, which is usually only located on the front, to be able to be expanded to the top side as well if necessary. [Means for solving the problem]

[0012] The present invention is applied to a ventilation booth comprising a box-shaped main body with an open front, a straightening vane supported inside the main body with one main surface facing the opening on the front side of the main body, and an exhaust unit attached to the outer surface of the main body with a suction port connected to the space inside the main body on the side of the other main surface of the straightening vane.

[0013] The straightening vane of the ventilation booth according to the present invention is supported with its upper end surface facing a location a predetermined distance away from the front end edge of the top of the main body, with each main surface tilted toward the bottom toward the rear or aligned vertically. Furthermore, in the present invention, at least the range from a predetermined position near the location where the upper end surface of the straightening vane faces to the front end edge of the top of the main body can be separated from both sides of the main body, and the opening on the top side formed by this separation is connected to the opening on the front side. In addition, if there is a portion on the upper front surface of the main body that is not open, that portion is also included as a component of the top portion and can be separated from both side portions of the main body.

[0014] According to the above configuration, by separating the portion of the top of the main body that can be separated from both side portions of the main body, the upper part of the work space is opened, and this opening allows the opening that was previously only on the front side to be expanded to near the upper end surface of the straightening plate of the top part. Therefore, by adjusting the position of the upper end surface of the straightening plate or the support range of the straightening plate so that the opening is expanded to a width suitable for passing items of a specified size that are intended to be placed in the work space, it is possible to easily remove items from the work space or place items in the work space.

[0015] The main body according to one embodiment of the ventilation booth described above includes a frame assembly forming the framework of the box body, and a plurality of panel members attached to the frames of the frame assembly to close the side, top, and back of the frame assembly. In this frame assembly, the frontmost frame among the frames connecting the side sides at the top is disposed at or near the location to which the upper end surface of the air straightening plate faces. In addition, the range of the panel members attached to the top of the frame assembly that are attached to the portions forward of the frontmost frames on both sides of the top are separably connected to the portions.

[0016] According to the above embodiment, by removably connecting both sides of the area of ​​the panel member attached to the top of the frame connector that is positioned in front of the foremost frame to the frame connector via magnets, hook-and-loop fasteners, etc., it becomes possible to easily separate this area from the frame connector to expand the opening.

[0017] The frame connector of the above embodiment may include a pair of rectangular frames forming the frames on both sides, and a plurality of rod-shaped frames for connecting these rectangular frames on the ceiling side. In this case, a screw hole or a connecting member for connecting the frontmost frame of the plurality of rod-shaped frames may be provided at the front end of the portion of the pair of rectangular frames facing the ceiling side, and at a location where the upper end face of the air straightening plate in the portion faces or at a predetermined position in the vicinity thereof.

[0018] According to the above-mentioned configuration, the frontmost rod-shaped frame can be attached not only near the location where the upper end face of the air straightening plate faces, but also at the location corresponding to the front end of the frame connecting body. When attached in the former location, the main body can be in a form in which the opening can be expanded toward the top, and when attached in the latter location, the main body can be in a conventional form in which the opening is limited to the front face only. In this way, the configuration of the main body can be easily changed simply by changing the connection location of the rod-shaped frame. Effect of the Invention

[0019] According to the ventilation booth of the present invention, by separating the portions of the top of the main body that can be separated from both sides of the main body, the opening that was previously only on the front side can be expanded to the upper part of the work space, making it possible to easily remove and insert items that are difficult to take in and out through the front opening before and after ventilation processing.

[0020] Furthermore, by adjusting the size of the main body and the support range of the baffle so that the work space formed in the main body is large enough to accommodate a machine with a cover that is attached from above, the opening that was only on the front side can be expanded to the upper range of the work space while the machine is placed in the work space, making it easy to attach and remove the cover to the machine body. Thus, a highly convenient ventilation booth can be provided that can be used for purposes other than painting and cutting. [Brief description of the drawings]

[0021] [Figure 1] 1 is a perspective view showing the appearance of a ventilation booth to which the present invention is applied; [Diagram 2] 2 is an oblique view showing the configuration of a frame connector that forms the skeleton of the main body of the above-mentioned ventilation booth. FIG. [Diagram 3] FIG. 2 is a cross-sectional view showing the internal configuration of the ventilation booth. [Figure 4]A diagram (partially cut away side view) of the ventilation booth with a 3D printer placed in the workspace. [Diagram 5] This is a diagram (partially broken away side view) showing the state in which the cover is being removed from the 3D printer in the above-mentioned work space. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Fig. 1 is a perspective view showing the exterior of a ventilation booth according to one embodiment of the present invention, and Fig. 2 is a perspective view showing a frame assembly forming the framework of the main body of the ventilation booth from the same angle as Fig. 1. Fig. 3 is a cross-sectional view taken along the center of the ventilation booth in the width direction. The configuration of the ventilation booth will be described in detail below with reference to these figures.

[0023] The ventilation booth of this embodiment is configured such that, inside a main body 100 having an opening at the front and a long rectangular parallelepiped shape in the vertical direction, two baffles 31 and 32 are arranged side by side in the front-rear direction with one main surface facing the opening 20 at the front, and an exhaust unit 4 is attached to one place on the top of the main body 100. The exhaust unit 4 is configured such that a suction port (not shown) is formed on the bottom surface of a case body 41 in which a fan and its drive unit (neither shown) are built in, and a cylindrical duct unit 42 is provided on the top surface, and the suction port is supported in a state in which it communicates with a space (a space that becomes a static pressure chamber) behind the baffles 31 and 32 inside the main body 100. As shown by the two-dot chain line in FIG. 1, a duct hose 43 is connected to the duct unit 42 when the ventilation booth is in use.

[0024] The main body 100 of the ventilation booth is formed by a frame assembly 1 shown in FIG. The frame connection body 1 is formed by two rectangular frame members 10L, 10R (hereinafter referred to as "rectangular frames 10L, 10R") that form both sides of the main body 100, and four rod-shaped frames 14, 15, 16, 17 (hereinafter referred to as "horizontal frames 14, 15, 16, 17") that connect the rectangular frames 10L, 10R with their length direction aligned with the width direction of the main body 100. All of these are iron frame members.

[0025] The rectangular frames 10L, 10R include a main frame (symbol omitted) that forms a rectangular frame that is long in the vertical direction, a vertical frame 13 that connects the top and bottom of the main frame at a position slightly rearward of the center in the depth direction, and a pair of front and rear support frames 11, 12.

[0026] The main frame has edge pieces 10a, 10b, 10c, and 10d of the same width as the rectangular frame 10 connected in a substantially perpendicular relationship to each side of a rectangular frame 10 that forms the side surface. The vertical frame 13 is an L-shaped frame having an outer piece 13a that extends vertically and is connected to the rectangular frame 10, and an inner piece 13b that is connected to the outer piece 13a in a substantially perpendicular relationship and faces the front and back edge pieces 10b, 10c.

[0027] The support frames 11, 12 are also L-shaped frames having strips 11a, 11b or 12a, 12b of equal width. The front support frame 11 has one strip 11a fitted to the outer surface of the rectangular frame 10 as an outer piece and the other strip 11b facing the front side as an inner piece, with one end connected to a predetermined position on the top of the back surface of the rectangular frame 10 (the intermediate position between the front end face of the rectangular frame 10 and the vertical frame 13) as shown in Fig. 3, and the other end connected to the intermediate position on the back surface of the outer piece 13a of the vertical frame 13. The rear support frame 12 has strips 12a, 12b facing in the same direction as the support frame 11 as the outer and inner pieces, respectively, with one end connected to the intermediate position of the inner piece 13b of the vertical frame 13 (a position slightly above the connecting position between the vertical frame 13 and the support frame 11) and the other end connected to a position slightly below the center of the side 10e on the back side of the rectangular frame 10. By these connections, the support frames 11, 12 are assembled into the rectangular frames 10L, 10R as oblique frames that are inclined in a direction approaching the bottom as they move rearward.

[0028] In this embodiment, the rectangular frames 10L, 10R are manufactured by manufacturing the main frame and the vertical frame 13 as one unit by punching, casting, forging, cutting, or other processing methods, and then connecting the support frames 11, 12 to them by welding or fixing screws, but this is not limiting, and the above four types of frames may be manufactured separately and then integrated by welding, etc. The main frame, which serves as a framework, may also be formed by connecting four L-shaped frames. Conversely, a frame member in which four types of frames are connected in series may also be manufactured.

[0029] The horizontal frames 14 to 17 are also L-shaped frames similar to the vertical frame 13 and the support frames 11 and 12. The horizontal frame 14 is aligned to a position on the edge piece 10a on the top side of each of the rectangular frames 10L and 10R slightly forward of the position to which the front end face of the support frame 11 faces, and is connected to that position by screws (reference numerals omitted). The horizontal frame 15 is aligned to the rear end edge of the edge piece 10a of each of the rectangular frames 10L and 10R, and the horizontal frame 16 is aligned to a position on the edge piece 10a of each of the rectangular frames 10L and 10R that is horizontal to the vertical frame 13, and is similarly connected to the aligned positions by screws (reference numerals omitted). The remaining horizontal frame 17 is connected to the bottom of the edge piece 10c on the back of each of the rectangular frames 10L and 10R by screws (reference numerals omitted). These connections form the frame connection body 1 that forms the framework of the main body 100.

[0030] Screw holes (not shown) for connecting these frames are formed in advance at the locations of the edge piece 10a on the top side of each of the rectangular frames 10L, 10R where the horizontal frames 14, 15, 16 are connected and at the location of the edge piece 10c where the horizontal frame 17 is connected. Furthermore, in the rectangular frames 10L, 10R of this embodiment, a screw hole h13 is also formed in the front end portion of the edge piece 10a so that the horizontal frame 14 can be connected to the front end portion.

[0031] The means for connecting the rectangular frames 10L, 10R to the horizontal frames 14-17 is not limited to screws. For example, connecting members into which the ends of the horizontal frames 14-18 can be fitted may be provided integrally at the connecting points of the edge pieces 10a, 10c of the rectangular frames 10L, 10R to the horizontal frames 14-17, and the horizontal frames 14-18 may be connected to these members. The screw hole h13 at the front end of the edge piece 10a can also be changed to a similar connecting member.

[0032] The horizontal frame 15 connecting the rear end edges of the top parts of the rectangular frames 10L, 10R and the horizontal frame 16 disposed in front of it are spaced apart by a distance that allows the front and rear end portions of the exhaust unit 4 to be placed on each of them. Furthermore, two screw holes h10 for fastening the exhaust unit 4 are provided on each of the horizontal frames 15, 16 in the range to the right of the width center (see FIG. 2). Two screw holes (not shown) corresponding to these screw holes h10 are also provided on the front and rear edges of the exhaust unit 4.

[0033] The side 10e on the rear side of the rectangular frame 10 of the main frame and the vertical frame 13 are spaced apart by a distance equal to the length between the horizontal frames 15, 16. Two screw holes h11 for fastening the exhaust unit 4 are provided in each of the side 10e and the outer piece 13a of the vertical frame 13 in the range above the center in the height direction.

[0034] Two screw holes h1 and h2 are also provided in the inner pieces 11b and 12b of the support frames 11 and 12. These screw holes h1 and h2 are used to connect the current plates 31 and 32.

[0035] Rectangular panel members 22, 23, 24, and 25 having the same size as the outer edges of the frames are attached to the left, right, back, and bottom frames of the frame assembly 1. These panel members 22 to 25 are lightweight resin boards (e.g., plastic cardboard), and are all connected to the outer surface of the frame assembly 1 with double-sided tape, low-hardening adhesive, or the like.

[0036] The panel members 22 to 25 can be removed from the frame assembly 1 for replacement when they become dirty or damaged, but are connected with a strength that does not allow them to come off easily during normal use. When they are removed, they are reconnected using new double-sided tape or adhesive.

[0037] A panel member 21 made of the same resin material as the panel members 22-25 is also attached to the frame of the top part of the frame connection body 1. The width of this panel member 21 is approximately the same as that of the frame of the top part, but its length in the depth direction is longer than that of the frame. The rear end face of the panel member 21 is aligned with the rear face (horizontal frame 15 and edge piece 10c) of the frame connection body 1, and the portion (indicated by reference symbol 21b) that protrudes forward from the top part of the frame connection body 1 is folded toward the front side and connected to the upper end of the edge piece 10b on the front side.

[0038] Although not shown in the drawings, the panel member 21 of the top portion has four screw holes formed therein that correspond to the screw holes h10 of the horizontal frames 15, 16 when the panel member 21 is in the above-mentioned connected state, and a through hole of a predetermined size is provided in the right half of the area of ​​the portion disposed between the horizontal frames 15, 16. The exhaust unit 4 is disposed on the panel member 21, aligned so that the screw holes at the front and rear ends of the unit 4 communicate with the screw holes of the panel member 21 and the horizontal frames 15, 16, and is further connected to the panel member 21 and the horizontal frames 15, 16 via the screws 5 passed through the screw holes that communicate at four locations. With this connection, the suction port of the exhaust unit 4 is connected to the internal space of the main body 100 via the above-mentioned through holes.

[0039] The top panel member 21, like the other panel members 22-25, is connected to the horizontal frames 14, 15, 16 and the area rearward of the connection points of the top edge pieces 10a of the rectangular frames 10L, 10R to the horizontal frame 14 using double-sided tape or adhesive, etc., with enough strength to prevent it from easily coming loose.

[0040] A plurality of neodymium magnets (not shown) are embedded in the thickness of both side edges of a portion (indicated by reference symbol 21a) of panel member 21 that is forward of the front end face of horizontal frame 14. Similarly, one or more neodymium magnets (not shown) are embedded in the thickness of both side edges of portion 21b of panel member 21 that is disposed on the front side of frame connection body 1. These portions 21a, 21b are connected to edge pieces 10a, 10b of frame connection body 1 only by the neodymium magnets, and can be easily detached from each edge piece 10a, 10b by pulling them outward from main body 100, and can be reconnected to them by placing them on edge pieces 10a, 10b.

[0041] Hereinafter, the above-mentioned portions 21a, 21b will be referred to as "movable pieces 21a, 21b." As shown by the two-dot chain lines in Fig. 3, the movable pieces 21a, 21b separated from the edge pieces 10a, 10b can be in a position that stands up on the top of the main body 100, and can also be in a position that tilts backward. Due to the movement of these movable pieces 21a, 21b, the range from the upper part of the front surface of the main body 100 (the part that was blocked by the movable piece 21b) to a position forward of the horizontal frame 14 of the top surface is opened, and this opening portion is connected to the original opening 20 on the front side, and the range forward of the straightening plate 32 of the main body 100 is largely opened.

[0042] On the back side of the boundary position between the part of the panel member 21 rear of the movable piece 21a and the movable piece 21a (a position along the front edge of the horizontal frame 14) and the boundary position between the movable pieces 21a and 21b (a position corresponding to the front edge of the edge piece 10a of the rectangular frames 10L and 10R), cuts (symbol omitted) are made along the width direction to a depth of about half the thickness to make bending easier.

[0043] However, it is not essential that the movable pieces 21a, 21b and the portion behind the movable piece 21a are formed from one panel member 21, and the movable pieces 21a, 21b may each be an independent panel member, and the three may be integrated by connecting the movable piece 21a to the portion behind it or to the movable piece 21b with tape or the like. Alternatively, the movable pieces 21a, 21b formed from independent panel members may not be connected to each other, and may not be connected to the rear portion either, so that the movable pieces 21a, 21b can be completely detached from the edge pieces 10a, 10b. Only the movable piece 21a may be connected to the rear portion, and the movable piece 21b may be completely detached from the edge piece 10b. The movable piece 21b is also not an essential element, and the opening 20 on the front side may be normally open up to the vicinity of the inner top surface without providing the movable piece 21b.

[0044] The means for releasably connecting the movable pieces 21a, 21b to the edge pieces 10a, 10b is not limited to neodymium magnets, but magnetic tape or hook-and-loop fasteners may also be used.

[0045] A tape-shaped LED board (not shown) is attached to the back surface of the horizontal frame 14 on the front side of the top section. A cable (not shown) for supplying power to this LED board is supported along the back surface of the top side of the rectangular frame 10R and the back surface of the central horizontal frame 16, led to the exhaust unit 4, and connected to the power supply circuit in the exhaust unit 4. The exhaust unit 4 is connected to an external power supply via another power cable (not shown).

[0046] The current plates 31 and 32 inserted into the main body 100 are both rectangular panel members having a width substantially equal to the width of the internal space of the main body 100. These current plates 31 and 32 are also made of a resin material.

[0047] The vertical width of the straightening plate 31 is set to be slightly shorter than that of the support frame 11, and a pair of screw holes (not shown) corresponding to the screw holes h1, h1 of the inner piece 11b of the support frame 11 are provided on both side edges. The straightening plate 31 is aligned with the front surface of the inner piece 11b so that the screw holes on both side edges communicate with the screw holes h1, h1 of the corresponding inner piece 11b, and is detachably connected to the inner piece 11b by thumb screws 3 inserted into the pair of communicating screw holes (see FIG. 3). With this connection, the straightening plate 31 is supported inside the main body 100 with one main surface facing the opening on the front surface of the main body 100 and with an attitude that is inclined so as to approach the bottom as it goes rearward. Due to this support, the front end face of the straightening plate 31 is directed toward a position slightly rearward of the horizontal frame 14 on the top of the main body 100, creating a predetermined amount of gap between the front end face and the inner top surface of the main body 100.

[0048] The straightening plate 32 has a vertical width that is slightly shorter than that of the rear support frame 12, and has cutouts (shown without symbols in Figure 1) on both side edges in the range from one long side to a predetermined position in the vertical width direction, and a pair of screw holes (not shown) corresponding to the screw holes h2, h2 of the inner piece 12b of the support frame 12 are provided in the area without the cutouts.

[0049] The straightening plate 32 is aligned with the front surface of the inner piece 12b with the notched portion facing upward and the screw holes on both sides communicating with the screw holes h2, h2 of the corresponding inner piece 12b, and is detachably connected to the inner piece 12b by the thumb screws 3 inserted into the pair of communicating screw holes (see FIG. 3). With this connection, the straightening plate 32 is also supported at a predetermined height range inside the main body 100 with one main surface facing the opening on the front surface of the main body 100 and with an attitude that is inclined so as to approach the bottom toward the rear. With this support, a predetermined amount of gap is created between the front end surface of the straightening plate 32 and the rear end surface of the straightening plate 31, and between the rear end surface of the straightening plate 32 and the inner back surface of the main body 100.

[0050] Instead of the thumb screws 3, neodymium magnets, magnetic tape, or hook-and-loop fasteners may be used to connect the rectifying plates 31, 32 to the support frames 11, 12. In either case of the connecting means, the rectifying plates 31, 32 are detachably connected to the frames 11, 12 that support them, so that the rectifying plates 31, 32 can be easily replaced if they become dirty or damaged. Also, when it is desired to clean the inner part of the main body 100, the rectifying plates 31, 32, 33 can be removed to easily perform the cleaning work.

[0051] The main body 100 of the ventilation booth configured as above is opened only at the front by connecting the movable pieces 21a, 21b to the edge pieces 10a, 10b of the rectangular frames 10L, 10R. At this time, the internal space of the main body 100 is divided into a space including the main surfaces (hereinafter referred to as the "front surfaces") of the straightening vanes 31, 32 facing the opening 20, and a part of each of the inner top and back surfaces (hereinafter referred to as the "front space" and indicated by the symbol FS), and a space including the back surfaces of the straightening vanes 31, 32 and the communication opening to the exhaust unit 4 (hereinafter referred to as the "rear space" and indicated by the symbol BS).

[0052] However, since there are gaps between the straightening plate 31 and the inner top surface of the main body 100, between the straightening plate 32 and the inner back surface of the main body 100, and between each of the straightening plates 31, 32, the front space FS and the rear space BS are not completely separated, and air can flow between the two spaces through these gaps.

[0053] With the above configuration, when the fan inside the exhaust unit 4 is rotated, the air in the rear space BS is sucked out to the outside, and the rear space BS becomes a static pressure chamber due to negative pressure. Then, due to the pressure difference between the rear space BS and the front space FS, the air in the front space FS flows through each gap into the rear space BS, and a pressure difference is also generated between the front space FS and the outside of the main body part 100, and air is sucked into the front space FS from the opening on the front surface. After hitting the front surface of the straightening plates 31 and 32, the sucked air is guided along the front surface to the gaps on the top and bottom sides and the gap between the straightening plates 31 and 32, and further flows into the rear space BS from these gaps. The air that has newly entered the rear space BS is also exhausted to the outside through the exhaust unit 4, and the negative pressure in the rear space BS is maintained, so that the above air flow can be sustained while the fan is rotating.

[0054] In this embodiment, each of the straightening plates 31, 32 is connected to the rectangular frames 10L, 10R with both side edges supported by the front faces of the inner pieces 11b, 12b of the support frames 11, 12, so that even when the air in the front space FS is sucked into the rear space BS by the rotation of the fan of the exhaust unit 4, each of the straightening plates 31, 32 is pressed against the inner pieces 11b, 12b and their respective postures and supported states are maintained. Similarly, the movable pieces 21a, 21b of the panel member 21 are pressed against the edge pieces 10a, 10b of the frame connecting body 1 and maintained connected to the edge pieces 10a, 10b while the fan of the exhaust unit 4 is rotating.

[0055] With the above-mentioned configuration and the action resulting from that configuration, the forward space FS can be used as a work space for carrying out work such as painting and cutting, and odors, dust, etc. generated by these work can be carried by the above-mentioned airflow to the exhaust unit 4 and discharged to the outside.

[0056] In addition, the main body 100 of the ventilation booth in this embodiment has a forward space FS that extends to the inner back surface and has sufficient height throughout the entire depth direction, so it can also be used to operate equipment that generates odors or harmful substances during operation (such as a desktop 3D printer) in an environment with ventilation functions.

[0057] 4 and 5 are side views of the ventilation booth with the right panel member 23 removed, limited to the area forward from the support frame 13, showing an example in which a stereolithography 3D printer 200 is placed in the front space FS. In addition, in Fig. 5, the model S produced by the modeling process is diagrammatically shown by a two-dot chain line.

[0058] The 3D printer 200 in the illustrated example has a resin tank 202, an elevating mechanism 204 that supports and moves up and down a platform 203 for a molded object, and other components arranged on the upper surface of a base 201 that houses an ultraviolet laser light source, and a cover 210 large enough to cover these components 202, 203, and 204 is attached to the base 201. In the example in Figures 4 and 5, the device body and the cover 210 are contained inside the front space FS.

[0059] The cover 210 is a translucent cover made mainly of ultraviolet-blocking resin, and is always attached to the base 201 while the 3D printer 200 is in operation in order to prevent the liquid resin in the resin tank 202 from solidifying due to ultraviolet light from the outside. This allows the components 201, 203, and 204 on the base 201 to be contained inside the cover 210, and also suppresses the diffusion of odors and gases containing harmful substances generated from the resin. Nevertheless, odors and gases leaking from the gap between the cover 210 and the base 201 may fill the room while the device is in operation for a long time, and may have adverse effects on the human body.

[0060] However, as shown in Figure 4, if the 3D printer 200 covered with the case 210 is placed in the front space FS of the ventilation booth, and the movable pieces 21a, 21b are attached to the edge pieces 10a, 10b of the frame connecting body 1 so that only the front of the main body 100 is open, and the exhaust unit 4 is moved while the 3D printer 200 is operating, odors and harmful substances that have leaked into the front space FS can be made to pass through the rear space BS and the exhaust unit 4 and be quickly exhausted to the outside, preventing the odors and harmful substances from diffusing throughout the room.

[0061] When the modeling process is completed and the model S is to be removed, the movable pieces 21a, 21b are removed from the edge pieces 10a, 10b to open the top section up to the front edge of the horizontal frame 14, as shown in Fig. 5, and the cover 210 can be lifted up and removed from the base 201, and then moved upward to be removed from the opening in the top section. The model S can also be easily removed from the wide-open front.

[0062] When reattaching the cover 210 to the 3D printer 200 from which the cover 210 has been removed, the installation work can be completed by lowering the cover 210 through the opening in the top part and attaching it to the base part 201 while leaving the 3D printer 200 housed in the forward space FS.

[0063] Therefore, the modeling process can be repeated while the 3D printer 200, which is a precision machine, is placed in a fixed location inside the front space FS of the main body 100 of the ventilation booth, and ventilation during this process can be ensured perfectly.

[0064] The cleaning machine for cleaning the model created by the 3D printer 200 and the hardening machine for secondary hardening also generate odors and harmful substances during operation, so it is desirable to place them in the ventilation booth configured as described above and operate them while ventilating. The main body of these devices is also attached with a cover-type case similar to the example in Figures 4 and 5, but the removal and installation of these cases can be easily performed in the same manner as in the example of the 3D printer 200.

[0065] In order to use the ventilation booth for ventilation while operating mechanical devices such as the 3D printer 200, cleaning machine, and hardener, the size of the ventilation booth must be such that these devices can fit into the front space FS. However, the entire device body does not necessarily need to fit into the space, and the ventilation effect can be ensured even if about half of the device protrudes from the front opening 20. As described above, while the fan of the exhaust unit 4 is rotating and air continues to flow from the front space FS to the rear space BS, which is a static pressure chamber, the air in front of the main body 100 also moves from the opening 20 toward the front space FS, and odors and harmful substances leaking from the part protruding in front of the opening 20 are sucked into the main body 100 together with the air and discharged to the outside.

[0066] Even FDM-type 3D printers, which are rarely covered with a case, can be placed in the front space FS of the ventilation booth configured as described above and operated while ventilating, preventing the odor generated when the resin filament melts from diffusing into the room. Even if this type of 3D printer can fit into the front space FS but cannot pass through the opening 20 because it is higher than the front opening 20, the device can be easily placed in the front space FS by removing the movable pieces 21a, 21b from the edge pieces 10a, 10b and expanding the opening 20 to the middle position of the ceiling.

[0067] Even in conventional painting and cutting work, if the item to be worked on occupies a large proportion of the front space FS in the height direction, it may be difficult to put the item into or take it out of the main body 100. Even in such a case, the ventilation booth configured as described above can easily take the target item in and out by moving the movable pieces 21a, 21b away from the frame connecting body 1 and expanding the opening 20 to the middle position of the ceiling. Therefore, it is meaningful to provide the movable pieces 21a, 21b similar to those in the above embodiment even in a ventilation booth that does not have the height to accommodate a machine such as a 3D printer.

[0068] In either case, the direction in which an article (case) is removed from the front space FS is not limited to the straight upward direction as shown in Fig. 5, and the article can also be pulled out diagonally upward. Similarly, when putting an article into the front space FS, the article can be lowered from above the front surface of the main body 100 diagonally downward.

[0069] The ventilation booth of the above embodiment can be provided to an end user by the end user performing the assembly work by using an assembly kit including various frame members 10L, 10R, 14-17, panel members 21-25, baffle plates 31, 32, exhaust unit 4, connecting screws, etc. that constitute the frame connection body 1. In this assembly work, the frontmost frame 14 of the three horizontal frames 14, 15, 16 that connect the rectangular frames 10L, 10R on the top side is connected to the position shown in Fig. 2, and the panel member 21 attached to the top is cut and a neodymium magnet is embedded in it so that the part of the panel member 21 in front of the horizontal frame 14 functions as the movable pieces 21a, 21b, thereby obtaining a main body 100 in a form in which the top can be opened and the opening is connected to the opening 20 on the front side, thereby widely opening the front space FS.

[0070] When there is no need to open the top of the main body 100, the forwardmost horizontal frame 14 can be aligned with the screw holes h13 at the front ends of the edge pieces 10a of each rectangular frame 10L, 10R and connected to the edge pieces 10a at that position, and the panel member 21 can be connected to the edge pieces 10a, 10b by double-sided tape, adhesive, or the like, without making any cuts or other processing.

[0071] As described above, it is possible to manufacture a ventilation booth with an open top or a conventional ventilation booth with a closed top by changing the connecting position of the horizontal frame 14. Even after assembling either type of ventilation booth, it is possible to change it to the other type by changing the connecting position of the horizontal frame 14 and replacing the panel member 21.

[0072] Other possible modifications will be briefly described below. In the above embodiment, the movable piece 21a is attached in the range from a position forward of the position of the top edge piece 10a toward which the upper end face of the straightening plate 32 faces to the front edge, but the range of the movable piece 21a is not limited to this. For example, the connection position of the horizontal frame 14 to the edge piece 10a can be changed to a position above the upper end face of the straightening plate 31 or to a position slightly rearward from that, and the range of the movable piece 21a can be expanded further rearward accordingly.

[0073] In the above embodiment, the location where the exhaust unit 4 is attached is not limited to the top surface of the main body 100. The panel member 21 of the top of the frame connection body 1 may be changed to one without through holes or screw holes, and the panel member attached to one of the rectangular frames 10L, 10R on both sides may be changed to one with through holes communicating with the suction port of the exhaust unit 4 and screw holes for connection, and the panel member may be attached to the rectangular frame 10L or 10R by aligning each screw hole with the vertical frame 13 and the screw hole h11 of the side portion 10e. In that case, the range of the movable piece 21a of the top may be further expanded, and for example, the range from the front edge to the vicinity of the horizontal frame 16 may be made the movable piece 21a. Also, the entire frame member 21 may be detachably connected to the edge pieces 10a, 10b by a neodymium magnet or the like, so that the entire inside of the frame of the top surface of the main body 100 can be opened.

[0074] If a frame of the same shape as the vertical frame 13 is connected to the frame on the rear side of the frame connection body 1 so as to be spaced from the left or right edge piece 10c by a length equivalent to the distance between the horizontal frames 15, 16, it becomes possible to support the exhaust unit 4 on the rear side of the main body 100. In this case, too, it is possible to make the range from the front edge of the main body 100 to the vicinity of the horizontal frame 16 openable, or to make the entire inside of the top frame openable and connect the opening to the opening 20 on the front side.

[0075] Only one straightening vane may be supported inside the main body of the ventilation booth. In addition, it is not essential that the main surface of the straightening vane is inclined so as to approach the bottom toward the rear, and the straightening vane with its main surface aligned vertically may be disposed at the middle position in the depth direction of the main body.

[0076] The main body of the ventilation booth is not limited to the above embodiment, and may be a box made entirely of metal material or a box made of multiple wooden panels. For these types of main body, the area from a predetermined position near the top of the ceiling where the top of the baffle plate faces to the front edge can be rotatably connected to the rear part via a hinge mechanism or detachably connected to both sides of the main body via fasteners, so that the area can be opened as needed and connected to the opening on the front side. [Explanation of symbols]

[0077] 1 Frame connection 4 Exhaust unit 10L, 10R Rectangular frame 10a,10b edge piece 20 Opening 21~25 Panel parts 21a,21b Movable piece 31,32 rectifier plate 100 Main body

Claims

1. A ventilation booth comprising: a box-shaped main body with an opening on the front side; a straightening plate supported inside the main body with one main surface facing the opening on the front side of the main body; and an exhaust unit attached to an outer surface of the main body with a suction port connected to a space inside the main body on the other main surface side of the straightening plate, The straightening plate is supported such that its upper end surface faces a position that is a predetermined distance away from the front end edge of the top portion of the main body, and each of its main surfaces is inclined so as to approach the bottom portion toward the rear, or each of its main surfaces is aligned in a vertical direction, The top of the main body is movable from a predetermined position near the position where the upper end surface of the straightening plate faces to the front edge of the top of the main body, and the opening on the top side formed by the movement is connected to the opening on the front side. A ventilation booth characterized by:

2. The main body includes a frame connector that forms a skeleton of the box body, and a plurality of panel members that are attached to the frames of both sides, a top part, and a back part of the frame connector to close these parts, The frontmost frame among the frames connecting both side portions of the frame connecting body at the top side is disposed at a position where the upper end surface of the straightening plate faces or in the vicinity thereof, The panel member attached to the top of the frame connecting body is connected to the front of the frontmost frame on both sides of the top of the frame connecting body in a region that is detachably connected to the front of the frame.

2. The ventilation booth according to claim 1.

3. The frame connector includes a pair of rectangular frames forming the frames on both sides, and a plurality of rod-shaped frames for connecting the rectangular frames on the top side, A ventilation booth as described in claim 2, wherein a screw hole or connecting member for connecting the forwardmost frame of the plurality of rod-shaped frames is provided at the front end of the portion of the pair of rectangular frames facing the ceiling and at a predetermined position near the location within said portion toward which the upper end surface of the air straightening plate faces.

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