JP7801730B2 - Connecting frame for ventilation booth and ventilation booth - Google Patents

Description

This 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 its main surface facing the front opening and a predetermined gap between at least one of the upper and lower end faces and the inner surface of the main body, and an exhaust unit is installed in an appropriate position on the main body to suck air out of the space behind the straightening plate inside the main body.

In a ventilation booth with the above configuration, when the exhaust unit is activated, the space behind the rectifying vane becomes a static pressure chamber with negative pressure, and air in front of the rectifying vane flows into the static pressure chamber through the gap between the rectifying vane and the main body, creating an air flow where it is exhausted from the exhaust unit, thereby exhausting odors and other fumes generated in the space in front of the rectifying vane of the main body.

One known form of ventilation booth of this type is one in which the main body is formed by attaching panel members large enough to close each frame to the outer surface of each frame, excluding the front portion, of a frame connecting body that forms a box-shaped framework (see Patent Document 1).

Patent Document 1 describes how, by connecting the left and right side edges of one or two straightening plates to the inner surface of the frame connecting body, the straightening plates are supported inside the main body with their main surfaces inclined so that they approach the bottom toward the rear; how, by including frames necessary for supporting the exhaust unit in the top and side frames of the frame connecting body, it is possible to select the surface on which the exhaust unit is attached; and how the panel members, straightening plates, and exhaust unit can be detachably attached to the main body.

Japanese Patent Application Laid-Open No. 2020-79669

In ventilation booths with the above configuration, the space in front of the straightening vane is used as a work space for tasks such as painting and cutting, making it difficult to use for work on items that cannot fit into this space. Furthermore, even if the item to be worked on can fit into the work space, depending on the type of work, there may not be enough free space around the item.

The above problems can be solved to some extent by stocking booths in multiple sizes. However, doing so requires manufacturing frame components, panel components, rectifier plates, and other components for each size, which increases costs. Furthermore, inventory management becomes complicated, and problems arise such as components of sizes with low demand becoming dead stock.

The present invention addresses the above problem and aims to provide a ventilation booth with an expanded work space without increasing the number of components.

In this invention, a ventilation booth comprising a unit frame that forms the skeleton of a box body, a plurality of rectangular panel members attached to the unit frame to close the frames on both sides, top and back of the unit frame, and a straightening plate supported on both sides of the unit frame so that its main surface faces the front of the main body of the front opening including the unit frame and the plurality of panel members and is positioned inside the box body at a predetermined distance from at least one of the top and bottom, is positioned as a single unit, and a connecting frame is provided for connecting and integrating multiple units side by side with the frame body and panel members that form the side that will be adjacent to other ventilation booth units removed .
This connecting frame will be referred to as the "connecting frame" hereinafter.

The connecting frame comprises a back frame that is wider than the unit frame and has the same height as the unit frame; a top frame and a bottom frame that are connected to both end edges of the back frame and extend forward, each with the same width as the back frame; and a support frame that is connected to at least one of the three frames and is positioned between the top frame and bottom frame.

The connecting frame of the above configuration is inserted between two unit frames arranged side by side. For each unit frame, the frame that forms the side on the side where the other unit frame is located, in other words the side adjacent to the connecting frame, is removed (including the frame that extends in the depth direction and forms one edge of the top and bottom).

At least the front and rear end portions on the top side and the rear end portion on the bottom side of the connecting frame are connected to the corresponding frames of the two unit frames. This connection forms a frame assembly in which the two unit frames are joined together with the connecting frame in between.

The sides, top, and back of each unit frame incorporated into the above-mentioned frame assembly can be fitted with the same panel members that are attached to each unit frame when it is used alone. By fitting one panel member to the corresponding area on the top and back of each unit frame, areas that can no longer be attached to the unit frame due to the removal of the side frame can also be attached to the top and back frames of the connecting frame. Therefore, any panel member can be attached to the frame assembly in the same condition as it would be on a single unit frame.

The connecting frame is sandwiched between two unit frames and connected to these unit frames at three points: the front and rear ends of the top section and the rear end of the bottom section. This means that the connecting frame can be kept upright and the top section can be kept horizontal without the need for a support frame on the front side. The space between the top and bottom frames can be left mostly open, with only a support frame installed to support one edge of the air straightening plate. Therefore, by attaching panel members to the top, back, and both sides of the frame link, the opening on the front is continuous without being partitioned by the connecting frame, and a work space free of obstructing elements can be created in the area from this opening to the front of the air straightening plate.

The straightening plates installed inside the main body can be the same type as those used in the basic units, and can be supported by the remaining side frames of each unit frame and the support frame of the connecting frame.

The exhaust unit is supported on the outer surface of at least one panel member, with its suction port communicating with the area behind the rectifying vane in the space inside the main body. One exhaust unit can be provided for each area corresponding to the unit frame, but only one exhaust unit may be used as long as it has sufficient power to generate the negative pressure required for ventilation in the space behind the rectifying vane.

When connecting three or more ventilation booth units, the connecting frame is sandwiched between the unit frames, and at least the front and rear end portions on the top side and the rear end portion on the bottom side of each connecting frame are connected to the corresponding frames of the two unit frames to the left and right. Then, the panel members that are attached to the corresponding locations of one unit's worth of unit frames are attached to the top and back of the frame connection formed by this connection, one for each unit, in the range corresponding to each unit frame, and one side panel member is attached to each side, forming a box-shaped main body.

Furthermore, in each space corresponding to each unit frame inside this main body, the same number of straightening plates as would fit in one unit can be supported by the support frames of the connecting frame on both sides of the space, or by the frame on the remaining side of the unit frame corresponding to the space and the support frame of the connecting frame facing this frame across the space.

The support frame of the connecting frame should preferably be constructed in accordance with the frame structure for supporting the air straightening plate of the unit frame. For example, if a support frame with a support surface whose width does not exceed the width of the top frame and the bottom or back frame of the frame bodies on both sides of the unit frame is connected between these frames with this support surface facing the front, it is recommended that a support frame of a similar configuration be connected between the top frame and the bottom or back frame of the connecting frame. The support surfaces of these support frames may be inclined so that they approach the bottom as they extend rearward, or the direction of each support surface may be aligned close to vertical.

To support the two straightening vanes, the frame bodies on both sides of the unit frame include intermediate frames that extend vertically and connect the top frame and the bottom frame. Support frames with support surfaces whose widths do not exceed the width of the frames are connected between the top frame and the intermediate frame, and between the intermediate frame and the bottom or back frame, with the support surfaces facing forward and tilted lengthwise so that they approach the bottom as they extend rearward. In this case, the connecting frame connected to the unit frame also has a similar intermediate frame in a position corresponding to the intermediate frame of the unit frame, and support frames of a similar shape to the support frames of the unit frame are provided between the top frame and the intermediate frame, and between the intermediate frame and the back or bottom frame.

In any of the above embodiments, by making the width of the support surface of the support frame on the connecting frame side wide enough to allow each of the straightening vanes placed in the spaces on the left and right of the connecting frame to be installed within the range from the side edge on that vane side to the center of the width, straightening vanes of the same specifications as those installed in a single ventilation booth unit can be supported in the spaces corresponding to each unit frame of the main body in the same manner as in that single unit.

If there are several types of unit frames whose length from the back of the main body to the front end of the area where the air straightening plate is supported is the same, but whose length from that area to the front opening is different, it is advisable to match the length of the top frame of the connecting frame to the shortest depth of those unit frames, and make it possible to removably connect a subframe to the front end of the top frame to eliminate the difference in depth. In this way, the same connecting frame can be used to connect multiple types of unit frames with different depths by attaching and detaching the subframe. The number of subframes attached is not limited to one, and multiple subframes can be connected in sequence. Alternatively, one of several subframes of different lengths can be attached to the top frame.

This invention allows the production of a ventilation booth with a width equivalent to that of multiple ventilation booth units connected together, using materials with the same specifications as those used to construct a single ventilation booth, except for the connecting frame, and with an undivided front and adjacent work space. This makes it easy to accommodate requests for changes to the size of the main body without incurring significant costs or effort. Furthermore, it is easy to provide ventilation booths with widths suited to the expected length of the items being worked on, for users whose primary purpose is to paint, cut, or otherwise work on long items.

FIG. 1 is a perspective view showing an example of the configuration of a composite booth having a size equivalent to two ventilation booth units arranged horizontally in a row. FIG. 2 is a perspective view showing the configuration of a frame connector of the main body of the above-mentioned composite booth. FIG. 2 is a plan view of the frame coupling body. FIG. 2 is an exploded perspective view showing the configuration and relationship between a main frame and a sub-frame of the connecting frame. FIG. 2 is a perspective view illustrating a connecting frame in a state in which the main frame and the sub frame are connected to each other. FIG. FIG. 4 is a left side view of the connecting frame. This is a front view showing an example of the configuration of a composite booth whose size is equivalent to three ventilation booth units lined up horizontally. FIG. 9 is a perspective view showing the configuration of a ventilation booth unit that forms the basis of the composite booths of FIGS. 1 and 8. FIG. 2 is an exploded perspective view showing the configuration of the main body of the ventilation booth unit. FIG. 2 is an explanatory diagram showing the air flow in the main body of the ventilation booth unit. FIG. 10 is a perspective view showing an example of the configuration of a frame connecting body for forming a composite booth based on a ventilation booth unit of the type in which one straightening plate is provided.

Figure 1 is a perspective view showing the exterior of a ventilation booth 101 to which the present invention is applied, and Figure 2 is a perspective view of a frame assembly 100 that forms the framework of the main body 101M of the ventilation booth 101, shown from the same angle as Figure 1. Figure 3 is a plan view of the frame assembly 100.

The ventilation booth 101 shown in Figure 1 is configured so that four rectifying vanes 3A, 3B, 3A, 3B are arranged two at a time, front to back and two at the left and right, with one main surface facing the front opening, inside a rectangular main body 101M with an open front, and an exhaust unit 4 is attached to a location on the top of the main body 101M. The exhaust unit 4 has a suction port (not shown) formed on the bottom of a case body that houses a fan and its drive unit, and a cylindrical duct section 40 on the top to which a duct hose is connected, and is supported with the suction port connected to the space behind the rectifying vanes 3A, 3B inside the main body 101M (a space that serves as a static pressure chamber).

The main body 101M of the ventilation booth 101 is formed by a frame assembly 100 shown in FIGS. 2 and 3 and a plurality of panel members 16, 17, and 18 attached to the frame assembly 100.
The frame connection body 100 is formed by two rectangular frames 11, 11 that form the frames on both sides of the main body portion 101M, a connecting frame 2 that has the same height as these rectangular frames 11 and is arranged in the center between each of the rectangular frames 11, and eight horizontal frames (distinguished by the symbols 12A, 12B, 12C, and 12D according to their respective positions) that connect each of the rectangular frames 11 and the connecting frame 2.

The ventilation booth 101 described above is equivalent to combining two basic booths 1 arranged side by side, with the basic form being the cubic ventilation booth 1 shown in Figure 9. The various components shown in Figures 1 to 3, except for the connecting frame 2, are of the same specifications as those used to manufacture the basic ventilation booth 1.
Hereinafter, this basic ventilation booth 1 will be referred to as a "ventilation booth unit 1," and a ventilation booth corresponding to a configuration in which multiple ventilation booth units 1 are connected will be referred to as a "composite booth."

Figure 10 is an exploded perspective view showing the assembly structure of the main body 1M of the ventilation booth unit 1 shown in Figure 9. First, the configuration of the ventilation booth unit 1 will be explained with reference to Figures 10 and 9.

The main body 1M of the ventilation booth unit 1 is formed by a basic frame assembly 10 (hereinafter referred to as the "unit frame 10") that forms the frame of each side of the cubic box, and multiple panel members 16, 17, and 18. The main body 1M is open on the front, with an exhaust unit 4 installed on the top and two straightening plates 3A and 3B installed inside.

The unit frame 10 is formed by a pair of rectangular frames 11, 11 that form the framework on both sides, and four horizontal frames 12A, 12B, 12C, and 12D that connect them. Each of these frames is an L-shaped frame bent at a right angle at the center of its width, i.e., a frame with a pair of connected pieces (numbers omitted) that are roughly perpendicular to each other. The width and length of each piece in all frames that make up the unit frame 10 are the same, and both the front and back surfaces of each piece are flat.

The rectangular frame 11 includes an intermediate frame 14 that connects the top and bottom sections at a position slightly rearward of the center of the frame body in the depth direction, and a pair of support frames 15A, 15B that are positioned in the area in front of and behind the intermediate frame 14, respectively. One of the pair of pieces in the frame body portion of the rectangular frame 11 forms the outer surface of the unit frame 10, and the other piece forms an edge that is continuous with the outer surface (corresponding to one end edge of each frame of the top, back, bottom, and front sections of the unit frame 10).

The intermediate frame 14 is connected between the top and bottom of the frame, with one of its paired pieces aligned with the outer surface of the frame, the other piece aligned along the width of the frame's edge, and its length aligned vertically. The support frames 15A and 15B are also connected with one of their paired pieces aligned with the outer surface of the frame, with the other piece facing the front and aligned along the width of the frame. One support frame 15A is connected between a predetermined position forward of the intermediate frame 14 on the top of the frame and a midpoint on the front of the intermediate frame 14 (slightly below the midpoint in this embodiment), while the other support frame 15B is connected between a midpoint on the back of the intermediate frame 14 (slightly higher than the connection position of support frame 15A to intermediate frame 14) and a position near the rear end of the bottom of the frame. The front surfaces of the widthwise pieces of each support frame 15A and 15B function as support surfaces for the straightening vanes 3A and 3B, and a pair of screw holes h1 and h1 are provided in these pieces.

The horizontal frames 12A, 12B, and 12C are joined at their respective joints, with their ends aligned with the front and rear edges of the top of each rectangular frame 11 and the intermediate frame 14, respectively. The remaining horizontal frame 12D is joined to the lower edge of the back of each rectangular frame 11.

Although detailed illustrations are omitted, the four horizontal frames 12A-12D are configured as L-shaped frames, with one of the paired pieces protruding at both ends so that it is longer than the other, and the thickness of the protruding parts is reduced with screw holes provided in the thin parts. Each of the horizontal frames 12A-12D is oriented so that the paired pieces form the outer surface of the unit frame 10, and the thin parts at both ends are screwed to the back surface of the rectangular frame 11 (the inner surface of the main body), thereby connecting it to the rectangular frame 11.

The middle frame 14 and rear frame 11b of the rectangular frame 11 are separated by a distance that allows the front and rear ends of the exhaust unit 4 to be placed between them. Two screw holes h2 for fastening the exhaust unit 4 are provided in each of these frames 14, 11b in the area above the center of their height. The distance between the horizontal frame 12C connected to the position corresponding to the middle frame 14 of each rectangular frame 11 and the horizontal frame 12B connected to the rear side is also the same as the distance between the two frames 14, 11b of the rectangular frame 11. Two screw holes h2 for fastening the exhaust unit 4 are also provided in the area to the right of the center of their width of each of these horizontal frames 12C, 12B.

A rectangular panel member 16 having approximately the same size as the outer edge of each frame is attached to each of the side, back, and bottom frames of the unit frame 10. A strip-shaped panel member 18 is attached only to the upper end of the frame on the front side of the unit frame 10.
A panel member 17, which has the same external shape and size as the panel member 16 but has a rectangular through-hole 19 and a screw hole h3 formed therein, is attached to the frame of the top portion of the unit frame 10. The through-hole 19 is sized to fit within the range between the horizontal frames 12C and 12B, and the screw hole h3 is provided at a position that communicates with the screw hole h2 when the through-hole 19 is aligned between the frames 12C and 12B.

The above panel members 16, 17, and 18 are lightweight boards made of resin such as plastic cardboard, and are all removably attached to the outer surface of the unit frame 10 using double-sided tape.

The two rectifying plates 3A and 3B that fit inside the main body 1M are also made from the same material as the panel members 16, 17, and 18. The rectifying plate 3A is a rectangular panel member with a width roughly equal to the width of the internal space of the main body 1M. The other rectifying plate, 3B, has a rectangular shape with the same width as the rectifying plate 3A, with two corners cut out on one long side.

A pair of screw holes h4, h4 corresponding to the screw holes h1, h1 in the support frame 15A are provided on both side edges (short sides) of the straightening vane 3A. These side edges are aligned with the front surface of the support frame 15A on the front side of the left and right rectangular frames 11, and thumb screws 30 are inserted into the pair of communicating screw holes h1, h4 and tightened, thereby supporting the straightening vane 3A in an inclined position along the support frame 15A (a position inclined so that the vane approaches the bottom as it extends rearward). Both side edges of the straightening vane 3A are set slightly shorter than the support frame 15A, which creates a predetermined gap between the front end surface of the straightening vane 3A and the top of the main body 1M (see Figure 11).

The length of both side edges of the straightening plate 3B, including the cutout portion, is set slightly longer than that of the rear support frame 15B. A pair of screw holes h4, h4 is also formed in the straightening plate 3B below the cutout portion. Each cutout portion faces upward, and the portion below the cutout is aligned with the front surface of the support frame 15B rearward of the intermediate frame 14 of each rectangular frame 11. The joints are connected by thumb screws 30 inserted into the pair of communicating screw holes h1, h4, so that the straightening plate 3B is supported in an inclined position along the support frame 15B (an inclined position approaching the bottom as it extends rearward). At this time, a predetermined gap is created between the rear end surface of the straightening plate 3B and the bottom of the main body portion 1M. Furthermore, the front end of the rectifying plate 3B (the area where the notch is provided) protrudes above the support frame 15B, so that the front end is positioned behind the rear end of the rectifying plate 3A with a predetermined gap between them (see Figures 1 and 11).

Note that the means for connecting the rectifying plates 3A, 3B to the support frames 15A, 15B is not limited to thumb screws 30; other screws or connecting members other than screws may also be used.

An exhaust unit 4 is placed on top of panel member 17 attached to the top of main body 1M, with its suction port aligned with through-hole 19. The front and rear ends of the bottom of the exhaust unit 4 are connected by screws (number omitted) inserted into sets of screw holes h2, h3 that connect the panel member 17 to horizontal frames 12C, 12B. As a result, the exhaust unit 4 is connected to the space behind the rectifying plates 3A, 3B of main body 1M and is supported on the top surface of main body 1M.

The exhaust unit 4 can also be attached to the side surface of the left or right rectangular frame 11 by attaching a panel member 17 with a through hole 19 between the middle frame 14 and the rear frame 11b of the left or right rectangular frame 11 so that the through hole 19 is inserted between the panel member 17. In this case, a panel member 16 without a through hole 19 is attached to the top of the main body 1M.

A tape-shaped LED board (not shown) is attached to the backside of one side of the horizontal frame 12A on the front side of the top section. The cable (not shown) for supplying power to this LED board is supported along the backside of the top section of the rectangular frame 11 and the backside of the central horizontal frame 12C, and is led to the exhaust unit 4 and connected to the power circuit within the exhaust unit 4. The exhaust unit 4 is connected to an external power source via a separate power cable.

Returning to the description of the complex booth 101.
The frame assembly 100 of the composite booth 101 shown in Figure 1 is composed of two rectangular frames 11, 11, the same number as the unit frames 10, two horizontal frames 12A, 12B, 12C, 12D (twice the number of unit frames 10), and one connecting frame 2 (see Figures 2 and 3).

The rectangular frames 11 are arranged on both sides of the frame assembly 100, just as in the unit frame 10, and one end of each of the four horizontal frames 12A, 12B, 12C, and 12D is connected to the top and bottom of each frame in the same relationship as to the unit frame 10. The other end of each horizontal frame 12A, 12B, 12C, and 12D is connected to the connecting frame 2 arranged between the rectangular frames 11.

4 and 5 are perspective views showing the configuration of the connecting frame 2, FIG. 6 is a right side view of the connecting frame 2, and FIG.
The connecting frame 2 of this embodiment is composed of a main frame 200 with an open front side, and a sub-frame 20 that is detachably connected to the front end portion of the main frame 200. These frames 200, 20 are also L-shaped frames, but one of the pair of pieces that form the L-shaped frame is approximately twice the frame width (width of one piece) of the unit frame 10. Hereinafter, the wider piece of these frames will be referred to as the "main piece" and the other piece will be referred to as the "sub-piece" (reference numerals will be omitted for both pieces).

The main frame 200 includes a back frame 21 of the same height as the rectangular frame 11, a top frame 22 and a bottom frame 23 that connect to both end edges of the back frame 21 and extend forward, an intermediate frame 24 that extends vertically at a midpoint in the depth direction and connects the top frame 22 and bottom frame 23, and a pair of support frames 25A, 25B that are positioned in the area in front of and behind the intermediate frame 24, respectively. The back, top, and bottom frames 21, 22, and 23 are connected in series so that one surface of the main piece forms the back, top, and bottom surface, respectively, and the secondary piece forms one side surface (in this example, the left side surface).

The length of the top frame 22 and bottom frame 23 is slightly longer than the distance from the back of the rectangular frame 11 to the front end of the front support frame 15A, but shorter than the overall depth of the rectangular frame 11. The front end of the top frame 22 is bent downward at a right angle, and the secondary pieces have been removed from the area from the bend to the connection point with the support frame 25A and from the hanging piece 22a created by the bend (see Figures 6 and 7). The portion of the bottom frame 23 forward of the intermediate frame also has a flat shape without secondary pieces (only the main piece).

The main piece of the intermediate frame 24 is parallel to the main piece of the back frame 21, and the secondary piece is connected to the secondary pieces of the top frame 22 and bottom frame 23. The distance between the intermediate frame 24 and the back frame 21 is set to a length equal to the distance between the intermediate frame 14 of the rectangular frame 11 and the back frame 11b.

Support frame 25A is connected between a position forward of the middle frame 24 on the top frame 22 and a central position on the front of the middle frame 24, while the other support frame 25B is connected between a central position on the back of the middle frame 24 and a position near the rear end of the bottom frame 23. The width direction of the main pieces of support frames 25A and 25B also matches the width direction of the main pieces of the other frames 21 to 24, and the secondary piece is aligned with the left side. The height range, orientation, and tilt direction of each support frame 25A and 25B are compatible with the support frames 15A and 15B on the rectangular frame 11 side. Two pairs of screw holes h6, h6 are provided side by side on the main piece of each support frame 25A and 25B. The height positions of these screw holes h6 also match the height position of screw holes h1 on the support frames 15A and 15B on the rectangular frame 11 side.

In the portion of the top frame 22 excluding the falling piece 22a (hereinafter referred to as the "main portion"), pairs of screw holes h5, h5 are provided side by side at three locations: the front and rear ends of the main piece forming the top surface, and a location corresponding to the intermediate frame 24. In addition, slits s1 extending in the front-to-rear direction are formed at the rear end of the upper edge of the secondary piece of the main portion and at a location corresponding to the intermediate frame 24 (see Figures 6 and 7). A pair of screw holes h7, h7 are formed diagonally side by side in the falling piece 22a (see Figure 4).
A pair of left and right screw holes h5, h5 is also formed in the bottom of the main piece of the back frame 21. In addition, an L-shaped slit s2 is formed in the lower corner of the secondary piece of the back frame 21 along its edge.

The subframe 20 is made from an L-shaped frame consisting of a main piece and a sub piece connected together, each with the same width and length as the main frame 200, and has vertically bent pieces 20a, 20b at both ends. One vertical piece 20a is the same length as the vertical piece 22a of the top frame 22, while the other vertical piece 20b is shorter than the other vertical pieces 20a, 22a. The sub pieces have also been removed from these vertical pieces 20a, 20b, and a pair of through holes h8, h8 are provided that fit the screw hole h7 in the vertical piece 22a of the main piece (see Figures 4 and 5 ).

The through holes h8, h8 of the falling piece 20b are aligned with the screw holes h7, h7 of the falling piece 22a of the top frame 22, and serve as the target screw fastening points. The through holes h8, h8 of the other falling piece 20a function as insertion holes for passing the shaft of a screwdriver that screws the falling pieces 20b, 22a.
In this embodiment, the falling piece 20b is shorter than the falling piece 20a, but this is not limitative, and both may be made the same length as the falling piece 22a of the top frame 22.

A pair of screw holes h5, h5 are provided side by side on the horizontal portion of the subframe 20 at the boundary with the descending piece 22a of the main piece, and a slit s1 of the same length as the one provided on the top frame 22 side is formed at the front end of the upper edge of the secondary piece (see Figures 6 and 7).

The subframe 20 configured as described above is connected to the main frame 200 by aligning the shorter downward-facing piece 20b with the downward-facing piece 22a of the top frame 22 and screwing it in place, aligning the orientation of the main and secondary pieces with those of the top frame 22 and positioning the screw hole h5 and slit s1 at the front end (see Figures 5-7). By connecting the subframe 20 in this way, the length of the top of the connecting frame 2 becomes approximately the same as the lengths of the top and bottom of the rectangular frame 11.

In the frame connection assembly 100 shown in Figure 2, of the three horizontal frames 12A, 12B, and 12C connected to the top sides of the left and right rectangular frames 11, 11, the rear and middle frames 12B and 12C are connected to corresponding locations on the top frame 22 of the connecting frame 2, and the front horizontal frame 12 is connected to the front end of the subframe 20A. Of these, the horizontal frame 12A, 12B, and 12C on the left side of the connecting frame 2 (the side with the secondary piece) has its thin-walled portion at the right end inserted through a slit s1 at the corresponding position on the subframe 20 or top frame 22 into the back surface (lower surface) of the main piece of that frame, and is aligned with the width of the main piece and screwed into a screw hole h5 located in that range, connecting the left rectangular frame 11 and the connecting frame 2. The thin-walled portions at the left ends of the horizontal frames 12A, 12B, and 12C on the right side, which do not have a secondary piece, are inserted into the back side of the main piece of the sub-frame 20 or top frame 22, aligned to the center of the width of the main piece, and screwed into the screw holes h5 in that range, connecting the rectangular frame 11 on the right side to the connecting frame 2.

The horizontal frame 12D connected to the lower end of the rear frame 11b of the left-hand rectangular frame 11 has its thin portion at the right end inserted through the slit s2 at the lower corner of the rear frame 21 of the connecting frame 2 onto the back (front) surface of the main piece of that frame 21, and is then aligned to the center of the width of the main piece and screwed into the screw holes h5 located within that area, thereby connecting the left-hand rectangular frame 11 and the connecting frame 2. The horizontal frame 12D connected to the lower end of the rear frame 11b of the right-hand rectangular frame 11 also has its thin portion at the left end inserted through the center of the width of the back of the main piece of the rear frame 21 and screwed into the screw holes h5 located within that area, thereby connecting the right-hand rectangular frame 11 and the connecting frame 2.

In this way, each of the rectangular frames 11 on both sides is connected to the connecting frame 2 via the three horizontal frames 12A, 12B, and 12C on the top side and the single horizontal frame 12D on the bottom side of the back. As a result, the unit frame 10R, with the frame body constituting the left side removed, is positioned on the right side, and the unit frame 10L, with the frame body constituting the right side removed, is positioned on the left side. This creates a frame assembly 100 equivalent to a configuration in which these two unit frames 10R, 10L are connected via the connecting frame 2 (see Figure 2). The spaces between each rectangular frame 11 and the connecting frame 2 of this frame assembly 100 correspond to the respective unit frames 10R and 10L.

One panel member 16 is attached to each of the rectangular frames 11, 11 on both sides of the frame assembly 100. Two panel members 16, 16 are attached to each of the back and bottom frames of the frame assembly 100, side by side with the width centers of the back frame 21 and bottom frame 23 as the boundary, thereby providing one panel member each in the range corresponding to the unit frames 10R, 10L. Panel members 16, 17 are also attached to the top frame, side by side with the width centers of the top frame 22 and subframe 20 as the boundary, thereby providing one panel member each in the range corresponding to the unit frames 10R, 10L.

Two rectangular panel members 18, 18 are attached to the upper end of the front face of the frame assembly 100, side-by-side with the center of the width of the descending piece 20a of the subframe 20 as the boundary. This attachment results in one panel member 18, 18 being deployed in the area corresponding to each of the unit frames 10R, 10L.

The various panel members 16, 17, and 18 described above are removably attached to the outer surface of the frame assembly 100 with double-sided tape, in the same way as they are to the unit frame 10. The front portions of the two bottom panel members that are not connected to the bottom frame 23 are also connected to each other with adhesive tape or the like. Once all the panel members are attached, the main body 101M of the composite booth 101 shown in Figure 1 is completed.

One side edge of the air straightening vanes 3A, 3B, the same type as in the ventilation booth unit 1, is aligned with the two support frames 15A, 15B of each rectangular frame 11 in the same manner as in the ventilation booth unit 1 and connected via thumb screws 30. The side edge of the air straightening vane 3A that is not connected to the support frame 15A is aligned to the center of the width of the support frame 25A of the connecting frame 2 and connected to the support frame 25A by thumb screws 30 inserted into the set of screw holes h6 and h4 that communicate with it within that range. The side edge of the air straightening vane 3B that is not connected to the support frame 15B is similarly aligned to the center of the width of the support frame 25B of the connecting frame 2 and connected to the support frame 25B by thumb screws 30 inserted into the set of screw holes h6, h4 that communicate with it.

Through these connections, the straightening plates 3A, 3B are also supported in the same position as in a normal unit frame 10 within the range corresponding to the unit frames 10R, 10L. Therefore, in the main body 101M, gaps (see Figure 11) similar to those in the ventilation booth unit 1 are formed between each straightening plate 3A and the ceiling, between each straightening plate 3B and the bottom of the main body 101M, and between the straightening plates 3A and 3B lined up front and back. The heights and orientations of the straightening plates 3A and 3A, and 3B and 3B lined up left and right, are also roughly aligned.

The panel member 17 having the through hole 19 is positioned between the horizontal frames 12B and 12C, similar to the unit frame 10, and is aligned so that the through hole 19 communicates with the screw hole h3 in the horizontal frames 12B and 12C. The exhaust unit 4 is also screwed to the panel member 17 and the horizontal frames 12B and 12C below it, similar to the ventilation booth unit 1.

The two horizontal frames 12A, 12A at the front end can each be fitted with a tape-shaped LED board similar to that in the ventilation booth unit 1. These LED boards are connected in a series or parallel relationship, and the LED board provided on the exhaust unit 4 side is electrically connected to the exhaust unit 4 via a power supply cable arranged in the same manner as in the ventilation booth unit 1.

The frame assembly 100 of the composite booth 101 described above can be assembled by connecting the various frame members 11, 12A-12D, and 2 one by one. Alternatively, it can be assembled by removing the left frame (rectangular frame 11) of one of two already assembled unit frames 10 (this becomes unit frame 10R) and the right frame (this becomes unit frame 10L) of the other. Then, inserting a connecting frame 2 between the removed sections of the unit frames 10R and 10L, and connecting the horizontal frames 12A-12D of each unit frame 10R and 10L to the connecting frame 2. In this case, the unit frames 10 to be connected can also be obtained by removing the panel members 16, 17, and 18, the rectifying plates 3A and 3B, the exhaust unit 4, etc. from the completed ventilation booth unit 1.

In the composite booth 101 configured as described above, the only frame other than the front edge is the descending piece 20a of the subframe 20 (the frame supporting the panel member 18), so the opening at the front is not blocked by the connecting frame 2. Even in the area forward of the straightening plates 3A and 3B inside the main body, this area only includes a portion of the intermediate frame 24 of the connecting frame 2 (the portion below the connection point with the support frame 25A) and the bottom frame 23, leaving the majority of the area open.

The section of the bottom frame 23 in front of the intermediate frame 24 is flat, consisting of only the main piece, so the only thing separating the area from the front to the intermediate frame 24 is the straightening plate 3A, and the bottom surface does not have any large steps. This allows items to be placed in this area in a stable position.

The space behind the straightening vanes 3A and 3B only includes the portion of the intermediate frame 24 of the connecting frame 2 above where it connects to the support frames 25A and 25B, and there are no components that would obstruct the air flow, so sufficient ventilation is possible. Furthermore, by attaching two panel members 17 with through holes 19 to the ceiling and attaching one exhaust unit 4 to each of these panel members 17, ventilation can be further enhanced.

When using two exhaust units 4, the exhaust unit 4 can be attached to the side by changing one or both of the left and right panel members 17 on the top to panel members 16 without through holes 19 and attaching a panel member 17 with through holes 19 to the rectangular frame 11 on that side. Also, if a vertical frame can be added to the rear frame, connecting the upper and lower horizontal frames 12B, 12D of the frame in the same positional relationship as the intermediate frame 14 to the rectangular frame 11, the panel member 17 with through holes 19 can be attached to the rear frame and the exhaust unit 4 can be attached to its outer surface.

Figure 8 shows a front view of a composite booth 102 with a width equivalent to three ventilation booth units 1, made using connecting panels 2 of the same configuration as above. The frame assembly 100X that forms the main body 102M of this composite booth 102 has two connecting frames 2 arranged between two rectangular frames 11, and the opposing rectangular frames 11 and connecting frames 2, or the connecting frames 2, 2, are connected via three horizontal frames 12A, 12B, 12C on the top side and one horizontal frame 12D on the bottom side, respectively. The connecting structure of each frame is the same as the example in Figure 2, so illustration and description are omitted.

The above-mentioned frame assembly 100X corresponds to a unit frame 10R from which the frame body constituting the left side has been removed, a unit frame 10C from which the frame bodies constituting both sides have been removed, and a unit frame 10L from which the frame body constituting the right side has been removed, which are arranged side by side with connecting frames 2 sandwiched between them, and each connecting frame 2 is connected to the unit frames on both sides to form an integrated unit.

The main body 102M of the composite booth 102 is formed by attaching one panel member 16 to each side (rectangular panel 11) of the frame assembly 100X configured as described above, three panel members 16 to each of the top, back, and bottom sections (however, two of the top sections are panel members 17), and three rectangular panel members 18 to the upper end of the front face of the frame assembly 100X. The three panel members attached to locations other than the side sections are attached side by side, with the center of the width of the connecting frame 2 as the boundary, so that one panel member is deployed in the range corresponding to each of the unit frames 10R, 10C, and 10L.

Two straightening vanes 3A, 3B are also provided inside the main body 102M, each in a range corresponding to the unit frames 10R, 10C, and 10L. The straightening vanes 3A, 3B provided between the rectangular frames 11 and the connecting frame 2 on both sides (in the range corresponding to the unit frames 10R, 10L) are connected to the support frame 15A or 15B of the rectangular frame 11 and the support frame 25A or 25B of the connecting frame 2, similar to the composite booth 101 of the embodiment shown in Figures 1-3, so that they are supported with their main surfaces facing the front opening and tilted toward the bottom toward the rear. The straightening vanes 3A, 3B provided between the two connecting frames 2, 2 (in the range corresponding to the unit frame 10C) are also supported with their side edges aligned to the width center of the support frame 25A, 25B in the corresponding height range of the connecting frame 2 on the corresponding side, and are connected to these ranges, so that they are supported in the same range and with the same tilt angle as the straightening vanes 3 on both sides.

8, two panel members 17 having through holes 19 are attached to the top of the main body 102M , sandwiching a panel member 16 of a type without through holes 19 in the middle, and exhaust units 4 are attached to the outer surfaces of these panel members 17. However, this is not limiting, and it is also possible to provide a panel member 17 having a through hole 19 in the center as well and attach an exhaust unit 4 onto it, thereby providing an exhaust unit 4 for each range corresponding to the unit frames 10R, 10C, 10L on the top surface.

When using three exhaust units 4, the exhaust units 4 can be attached to the center of the top surface and both side surfaces by attaching panel members 17 with through holes to the center of the top surface of the main body 102M and to the left and right rectangular panels 11. Even when the number of exhaust units 4 is limited to two, the location where each exhaust unit 4 is attached can be changed from the top surface to the side surfaces. Furthermore, as explained in the composite booth 101 of the example in Figures 1 to 3, the exhaust units 4 can also be attached to the rear side of the main body.

Composite booths that can be produced using the connecting frame 2 are not limited to the configurations shown in Figures 1 and 8; composite booths equivalent to connecting a greater number of ventilation booth units 1 can also be produced. In any composite booth, the required number of connecting frames 2 are placed between two rectangular frames 11, and the frame assembly that forms the skeleton of the main body can be formed by connecting opposing rectangular frames 11 and connecting frames 2, or two connecting frames 2, 2, via four horizontal frames 12A, 12B, 12C, 12D. Furthermore, the desired composite booth can be completed by attaching panel members 16, 17, 18 and straightening plates 3A, 3B to the areas corresponding to the individual unit frames of this frame assembly, and installing exhaust units 4 in the appropriate locations.

Therefore, by preparing a sufficient number of each type of component, it is possible to respond to requests for changes to the front opening or width of the work space in any way, and it is easy to provide a composite booth of a size suitable for tasks such as painting long items like fishing rods or cutting long plates and bars.

By removing the front sub-frame 20, the connecting frame 2 configured as shown in Figures 4 to 7 can connect the front horizontal frame 12A to the front end of the top frame 22 (the gap between the falling piece 22a and the support frame 25A), as shown by the dashed line in Figure 2. Therefore, if a rectangular frame that eliminates the section between the front support frame 15A and the front end face is available as a component for a ventilation booth with a narrow depth, this rectangular frame can be used with the main frame 20 of the connecting frame 2 and the horizontal frames 12A to 12D to create a frame assembly whose front end is located at the dashed line in Figure 2.

To create a ventilation booth with an expanded depth (hereinafter referred to as a "depth-expandable booth"), if a rectangular frame is prepared in which the distance between the front support frame 15A and the front end face is set approximately twice that of the example in Figure 10, another subframe 20 can be connected to the front end of the connecting frame 2 to which the subframe 20 is attached (by aligning the downward-facing piece 20a of the already-attached subframe 20 with the downward-facing piece 20b of another subframe 20 and connecting the two with bolts and nuts), and this connecting frame 2 and the rectangular frame for the depth-expandable booth can be used with horizontal frames 12A-12D to create a frame assembly corresponding to the connected unit frames of the depth-expandable booth.

Whether it's a narrow-depth or extended-depth type, a composite booth can be completed by attaching the panel members and straightening plates used to make the basic ventilation booth unit of that type to the frame connector described above and installing the exhaust unit 4 in the appropriate location.

FIG. 11 is a schematic diagram showing the air flow that occurs when the exhaust unit 4 is moved in the ventilation booth unit 1 shown in FIG.
When the fan 41 inside the exhaust unit 4 is rotated, the air in the space BS behind the rectifying vanes 3A and 3B lined up in front and behind is sucked out to the outside, and the space BS becomes a static pressure chamber due to negative pressure. Then, due to the pressure difference between the front and rear of the rectifying vanes 3A and 3B, air is sucked in through the opening on the front of the main body 1M. After hitting the front surfaces of the rectifying vanes 3A and 3B, the air is guided along the front surfaces into the gaps above and below the front surfaces and into the gaps between the rectifying vanes 3A and 3B, and then flows into the static pressure chamber BS from these gaps. The air that has newly entered the static pressure chamber BS is also exhausted to the outside via the exhaust unit 4, and the negative pressure in the static pressure chamber BS is maintained, so the above air flow can be maintained while the fan 41 is rotating.

Even in a composite booth made using the components of the ventilation booth unit 1 and the connecting frame 2, the only component that enters the space in front of and behind the straightening plates 3A and 3B is the intermediate frame 24 of the connecting frame 2, so there is no risk of the air flow being obstructed.
Therefore, if an appropriate number of exhaust units 4 according to the size of the booth are arranged in a location that communicates with the space behind the straightening plates 3A and 3B, an air flow similar to that shown in Figure 11 can be generated, and the space behind the straightening plates 3A and 3B can be made to function as a static pressure chamber.

So far, we have explained a composite booth based on a ventilation booth unit 1 (see Figure 9) that incorporates two straightening plates 3, and the connecting frame 2 used to manufacture it. However, a composite booth can also be manufactured using a similar mechanism for a ventilation booth unit that supports only one straightening plate.

Figure 12 shows an example of the configuration of a frame assembly 110 for a composite booth (neither booth is shown) based on a ventilation booth unit that supports only one straightening vane. Similar to the example in Figure 2, this frame assembly 110 corresponds to a unit frame 10'R with the left frame removed and a unit frame 10'L with the right frame removed, connected together via a connecting frame 210 placed between them.

The basic configuration is the same as the example in Figure 2, so here we will omit the explanation by assigning the same reference numerals to the common components as in Figure 2, and focus on the changes.

On both sides of the frame connector 110, a rectangular frame 111 is provided, including a single support frame 112 that connects a predetermined position forward of the center of the top width to a position near the rear end of the bottom without an intermediate frame. This support frame 112 also has a pair of perpendicularly connected pieces, one of which faces the front side and functions as a support for the rectifying plate. Three screw holes h10 are provided at approximately equal intervals in this support part.

The connecting frame 210 is an integrated frame without a sub-frame 20, i.e., it has a top frame 211 that is the same length as the depth of the rectangular frame 111. The front end of the top frame 211 is bent downward at a right angle, and the resulting downward-hanging piece 211a and the secondary piece have been removed from the front end of the horizontal section.

Four horizontal frames 12A, 12B, 12C, and 12D, each with the same configuration as in the example in Figure 2, are connected to the top and bottom of rectangular frame 111 in the same relationship as shown in Figure 2. Of these, horizontal frame 12A, which is connected to the front end of rectangular frame 111, has its edge on the connecting frame 210 side inserted into a notched section in the front end of the sub-piece of the top frame 211, and is connected up to the center of the width of that section. The connection structure between the other horizontal frames 12B, 12C, and 12D and connecting frame 200 is the same as in the example in Figure 2.

The connecting frame 210 also does not have an intermediate frame. Instead, a single support frame 212 is provided between the top frame 211 and the bottom frame 23, with a position and inclination angle that matches the support frame 112 on the rectangular frame 111 side. The main piece of this support frame 212 has a pair of left and right screw holes h20, h20 at three locations at heights corresponding to the screw holes h10 on the support frame 112 side.

The frame connector 110 configured as described above can be fitted with panel members 16, 17, and 18 of the same specifications as those shown in Figures 1 and 9. However, the panel member 17 with the through hole 19 can only be fitted to the top, and therefore the location where the exhaust unit 4 can be attached is limited to the top surface.

Between each rectangular frame 111 and connecting frame 210, a straightening vane (not shown) is provided. The width of the straightening vane matches the distance between the frames 111 and 210, and the length is slightly shorter than that of the support frames 112 and 212. Each of these straightening vanes has three screw holes on each side edge, one at each location that matches the screw holes h10 and h20 in the support frames 112 and 212. The side edge of each straightening vane on the rectangular panel 111 side is aligned with the front surface of the support frame 112, and the side edge of the connecting frame 210 side is aligned to the center of the width of the support frame 202. The straightening vanes are connected at the screw holes h10 and h20, allowing them to be supported in the same inclined position as the support frames 112 and 212. A predetermined gap is also formed between the front end surface of the straightening vane and the top of the main body, and between the rear end surface of the straightening vane and the bottom of the main body. However, this gap may also be present only on the top side or only on the bottom side.

Like the connecting frame 2 in the previous example, the connecting frame 210 described above can also be used to create a frame assembly with a width equivalent to three or more composite booths.

As in the example of Figure 12, when there is only one support frame 112, 212 attached to the rectangular frame 111 or the connecting frame 210, the inclination of the support frame 112, 212 can be made gentler, and the air rectifier can be supported in a nearly vertical position in the center of the depth direction. Conversely, by connecting the rear ends of the support frames 112, 212 to the back frame, the degree of inclination of the support frames 112, 212 and the air rectifier can be made greater than in the example of Figure 12. Even if the degree of inclination is not changed, the support range of the air rectifier 3 can be retracted by connecting the rear ends of the support frames 112, 212 to the back and shifting the support position on the ceiling further back.

In a composite booth constructed using the frame connector 110 shown in Figure 12, the exhaust unit 4 can only be attached to the top surface. However, if a vertical frame is installed between the top of the side rectangular frame 111 and the support frame 112, or if a reinforcing bracket with equivalent functionality is installed between the two frames, it will be possible to attach the exhaust unit 4 to the side as well.

When attaching the exhaust unit 4 to the side, the horizontal frame 12C at the middle position of the top can be removed from the frame connector 110, leaving only the front and rear ends of the top frame 211 and the lower end of the back frame connected to the rectangular frame 111.

Even with the frame connection unit 100 configured as shown in Figure 2, if panel members made of high-strength resin or wood are installed instead of lightweight resin panel members, the horizontal frame 12C in the middle of the top section can be removed, and the connecting frame 2 can be connected to the unit frames 10R and 10L on both sides at three points: the front and rear ends of the top frame 22 and the rear end of the bottom side. Furthermore, if the panel members are strong enough to screw the exhaust unit 4 directly, it will be possible to attach the exhaust unit 4 to the top section even if there is no horizontal frame 12 in the middle of the top section.

In the ventilation booth unit 1 and composite booth described so far, it is assumed that the openings on each side of the frame assembly 100, except for the front, are sealed with panel members, but it is not necessary to attach panel members to the bottom. If a protective sheet or plate is provided on the workbench on which the booth is placed, the bottom of the main body can also be open.

In the above embodiment, the width of the support surface for the panel members 16, 17, 18 and the rectifying plates 3A, 3B formed by the main pieces of the connecting frame 2 is described as approximately twice the frame width of the unit frame 10 (the width of one of the pair of pieces). However, the width of the main pieces may be narrower or wider than the above width as long as it does not interfere with support for the panel members 16, 17, 18 and the rectifying plates 3A, 3B. If the width of the main pieces of the connecting frame 2 is more than twice the frame width of the unit frame 10, slight gaps will form between the panel members and rectifying plates attached side by side to the connecting frame 2. However, since this gap is located above the main pieces of the connecting frame 2, there is no risk of a decrease in support strength. The width of the frame assembly can also be made slightly wider.

As explained in the various embodiments above, according to the present invention, a composite booth can be manufactured using the same components and connecting frames used to assemble ventilation booth units, with a width equivalent to two or more ventilation booth units lined up in a row, and with a front opening and adjacent work space connected together without any partitions.

The panel components, rectifier plates, and exhaust unit are all detachable, and the frame connector can also be disassembled, allowing the composite booth to be expanded or contracted freely after assembly. If any of the components are damaged or malfunction, only that part needs to be replaced. If dust or dirt accumulates inside the main body, it can be easily cleaned by removing the rectifier plates.

DESCRIPTION OF SYMBOLS 1 Ventilation booth unit 2, 210 Connecting frames 3A, 3B Straightening plate 4 Exhaust unit 10 Unit frame 14 Intermediate frames 15A, 15B Support frame 20 Subframe 21 Back frame 22, 211 Top frame 23 Bottom frame 24 Intermediate frames 25A, 25B, 212 Support frames 100, 100, 110 Frame connecting body

Claims (5)

a plurality of ventilation booth units each comprising a unit frame forming the framework of a box body, a plurality of rectangular panel members attached to the unit frame to close the frames of both sides, top and back of the unit frame, and a straightening plate supported on both sides of the unit frame so as to be disposed inside the box body with its main surface facing the front of a main body of a front opening including the unit frame and the plurality of panel members and spaced a predetermined gap from at least one of the top and bottom, the frame being for connecting a plurality of ventilation booth units side by side with the frame bodies and panel members constituting the side portions adjacent to other ventilation booth units removed,
The chair includes a back frame having a width wider than the frame width of the unit frame and a height equal to that of the unit frame, a top frame and a bottom frame which are connected to both end edges of the back frame and extend forward, each having a width equal to that of the back frame, and a support frame which is inserted between the top frame and the bottom frame and is connected to at least one of the three frames,
The first unit frame is disposed between the positions where the frame body constituting the left side has been removed and the second unit frame is disposed between the positions where the frame body constituting the right side has been removed, and at least the front end portion and rear end portion on the top side and the rear end portion on the bottom side are connected to the frames at the corresponding positions of each unit frame,
Among the panel members attached to the top and back of each of the first and second unit frames, those portions that can no longer be attached to the unit frames due to the removal of the frame body are attached to the top frame and back frame, and among those portions of the rectifying plate corresponding to each unit frame that are supported by the unit frame, those portions that can no longer be supported by the unit frame due to the removal are supported by the support frame.
A connecting frame for a ventilation booth. The support frame includes a support surface having a width not exceeding the width of the top frame and the bottom frame, and is connected between the top frame and the bottom frame or the back frame with the support surface facing forward,
The left edge of the flow plate corresponding to the first unit frame is connected within a range from the right edge to the width center of the support surface, and the right edge of the flow plate corresponding to the second unit frame is connected within a range from the left edge to the width center of the support surface.
A connecting frame for a ventilation booth according to claim 1. An intermediate frame is provided at a position a predetermined distance forward from the back frame, extending in the vertical direction and connecting the top frame and the bottom frame,
Between the top frame and the intermediate frame, and between the intermediate frame and the bottom frame or the back frame, respectively, support frames having support surfaces with widths not exceeding the widths of these frames are connected in a state in which the support surfaces face forward and are inclined so as to approach the bottom as they go rearward,
Two straightening plates are arranged in the spaces corresponding to the first and second unit frames, respectively, and the left edges of the two straightening plates corresponding to the first unit frame are connected within the range from the right edge to the width center of the support surfaces of the two support frames provided in front and behind the intermediate frame, and the right edges of the two straightening plates corresponding to the second unit frame are connected within the range from the left edge to the width center of the support surfaces of the two support frames, respectively.
A connecting frame for a ventilation booth according to claim 1. A subframe that is shorter than the top frame and has the same width as the top frame is detachably connected to the front end of the top frame.
A connecting frame for a ventilation booth according to any one of claims 1 to 3. A plurality of unit frames forming the framework of the box body are arranged side by side with the frame members constituting the sides on which the other unit frames are arranged removed, and a box-shaped main body with an open front is formed by a frame assembly formed by connecting the unit frames with connecting frames inserted one by one between the unit frames, and a plurality of panel members attached to the frame assembly to close the frames on both sides, the top, and the back of the frame assembly.
The connecting frame includes a back frame having a width wider than the frame width of the unit frame and a height equal to that of the unit frame, a top frame and a bottom frame connected to both end edges of the back frame and extending forward with a width equal to that of the back frame, and a support frame connected to at least one of the above three frames so as to be inserted between the top frame and the bottom frame, and at least the front end portion and rear end portion on the top side and the rear end portion on the bottom side of the connecting frame are connected to frames at corresponding positions of the two unit frames located adjacent to the left and right, respectively;
A rectangular panel member of a size corresponding to the top of one unit frame is attached to the top of the frame connecting body, and a rectangular panel member of a size corresponding to the back of one unit frame is attached to the back of the frame connecting body, with the number of panel members corresponding to the unit frames included in the frame connecting body being one panel member each in the range corresponding to each unit frame, and the parts of the panel members that can no longer be attached to the unit frames due to the removal of the frame bodies are attached to the top frame and back frame of the connecting frame at the position of the removed frame body,
A certain number of rectifying plates are supported in each space corresponding to each unit frame inside the main body by the support frames of the connecting frame on both sides of the space, or by the frame on the side of the unit frame corresponding to the space that is not removed and the support frame of the connecting frame that faces this frame across the space, with their main surfaces facing the opening on the front and at a predetermined distance from at least one of the top and bottom of the main body,
A ventilation booth in which an exhaust unit equipped with an intake port, an exhaust port, and a fan is supported on the outer surface of at least one of the panel members attached to the top, back, and both sides of the frame connecting body, with the intake port communicating with the area behind the straightening plate inside the main body.