JP2007268449A - Filter unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter unit locally and readily adjusting air flow rate as well as forming a uniform air flow or a laminar flow, and applied to any of a smaller paint booth and a larger paint booth. <P>SOLUTION: The filter unit 100 includes a filter 20 for purifying air and a frame body 10 for supporting the filter 20, and is disposed in a room for the purpose of supplying or exhausting air. In the filter unit 100, at least two perforated plates 31 and 32 disposed so as to be overlapped with each other are provided at a part of the frame body 10 opposed to the filter 20 so as to be relatively moved, the perforated plates 31 and 32 are relatively moved along a face direction to change overlapping between openings 31a and 32a formed in the porous plates 31 and 32, and air passing through the filter 20 is adjusted in air flow rate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a filter unit arranged for supply or exhaust in a room, for example, a filter unit constituting a painting booth for painting automobiles and large structures as well as small structures such as furniture, and a clean room For filter units used in filter units that remove dust and pollutant gases in hospitals and hospitals, in particular, air volume adjustment can now be performed reliably while generating a uniform air flow and steady laminar flow. This relates to the filter unit.

The conventional painting booth is to apply paint on a regular “laminar flow” regardless of the size of the object to be painted, whether it is wet or dry. If the laminar flow is disturbed, a non-uniform coating film is formed. For example, in Patent Document 1, efforts are made for uniform laminar flow formation and air volume adjustment.
Japanese Patent Laid-Open No. 11-179255, representative diagram, FIG.

  The “push-pull type painting booth with a perforated plate” proposed in Patent Document 1 “is easy to generate a uniform laminar flow by providing an air supply chamber in the front of the dry painting booth, It was made for the purpose of shortening the adjustment time of the supply air laminar flow. As shown in FIG. 15, “the supply air chamber is provided at the back of the painting booth and the exhaust chamber is provided at the front of the painting booth. It is easy to generate a uniform laminar flow, shortens the adjustment time effective for preventing the diffusion and retention of contaminated air, and adjusts the balance between supply and exhaust, and shortens the wind speed adjustment time. '' Is.

  However, this “balance adjustment of air supply and exhaust, wind speed adjustment” is performed in accordance with the contents of paragraphs 0015 and 0020 of Patent Document 1 and FIG. 5 of FIG. Is a perforated plate comprising a filter 16a and an ex-band metal 16b drilled with a required diameter and a required interval. "," The first rectifying plate 16 is a partition plate 16c, 16c having a required area, and each partition plate is From the point that “16c is an openable filter door by hinges 16d”, it is considered that “stagnation part of air” is generated depending on the opening degree of the partition plates 16c and 16c having a required area.

  Further, in this Patent Document 1, it is unclear which mechanism is used to specifically adjust the air volume by “opening and closing filter doors by hinges 16d for each partition plate 16c”, but “opening and closing filter doors”. ", The air volume changes depending on the opening / closing amount. Therefore, the air volume adjustment must be performed by adjusting the opening degree of the" open / close filter door ", and it is considered that the air volume adjustment is very difficult. Moreover, since the door must be fixed at the adjustment position, such a means must also be adopted, but it is considered that nothing is shown in Patent Document 1.

  Furthermore, in the technique of Patent Document 1, since the air volume in the painting booth is adjusted by a damper provided in the air supply unit, the air volume cannot be adjusted by individual filters. For this reason, a portion with a large wind speed and a portion with a small wind speed are formed at the same time, and it is considered that uniform painting cannot be performed with the technique of Patent Document 1.

  In particular, when the technique of Patent Document 1 is applied to a large-scale painting booth (a booth for painting a large structure), it may become more difficult to adjust the uniform flow and air volume. Conceivable.

  Therefore, the inventors of the present invention can form a uniform flow and laminar flow for this type of filter unit, and can easily adjust the air volume locally and easily even in a small-scale coating booth. As a result of various studies on how to make it applicable to various painting booths, the present invention has been completed.

  That is, the object of the present invention is not only that a uniform flow or laminar flow can be formed, but also air volume adjustment can be performed locally and easily. Is to provide a filter unit applicable.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the best mode described below.
“A filter unit 100 that includes an air purification filter 20 and a frame 10 that supports the filter 20 and is disposed indoors for supply or exhaust,
At least two perforated plates 31 and 32 arranged to overlap each other are provided on the part of the frame 10 facing the filter 20 so as to be relatively movable,
By relatively moving these perforated plates 31 and 32 along the surface direction, the overlapping degree of the openings 31a and 32a formed in the perforated plates 31 and 32 is changed, and the air volume of the air passing through the filter 20 is changed. Filter unit 100 characterized in that adjustment can be performed "
It is.

  That is, as shown in FIGS. 3 to 5, the filter unit 100 according to claim 1 includes an air purification filter 20 and a frame body 10 that supports the filter 20. In this configuration, at least two perforated plates 31 and 32 arranged so as to overlap each other are provided in a portion facing the filter 20 so as to be relatively movable.

  In addition, the filter unit 100 may be used alone, but by connecting a plurality or many of them to each other on the outer peripheral surface of the frame body 10, the filter unit 100 has a large area as shown in FIGS. A wall of a painting booth 200 for painting a car or a large structure as shown in FIG. 1 as well as a small structure such as furniture can be configured. Furthermore, this filter unit can be used as a filter unit or the like that removes dust and pollutant gases in a clean room or a hospital alone or in combination.

  In the painting booth 200 shown in FIG. 1, as shown also in (2) of FIG. 2, the inside of the wall formed by the filter unit 100 is used as a painting chamber 210 for performing actual painting work, and the filter in the painting chamber 210 is used. On the side opposite to the unit 100, an intake or exhaust duct 220 for discharging or supplying air is formed. That is, when the filter unit 100 according to the present invention sucks the air containing the paint in the painting chamber 210 from the duct 220 side, the filter 20 in the filter unit 100 removes the paint by the filter 20 and ducts the air into the painting chamber 210. In the case of feeding from the 220 side, dust is removed by the filter 20 therein, and clean air is fed into the coating chamber 210.

  As shown in FIGS. 3 to 5, the filter unit 100 according to claim 1 includes a filter 20 and a frame body 10 that supports the filter 20, and the frame body 10 includes at least two perforated plates. 31 and 32 were provided so that relative movement was possible.

  As shown in FIGS. 3 to 5, each of the perforated plates 31 and 32 is literally plate-like having openings 31 a and 32 a for passing air passing through the filter, that is, air from the filter 20 or air toward the filter 20. As shown in FIGS. 4 to 6, they are assembled on the frame 10 side so as to be movable in the surface direction. When these perforated plates 31 and 32 are completely overlapped, as shown in FIG. 3 (1), the openings 31a and 32a are in a state of being coincident with each other, and they are slightly shifted from each other. Sometimes, as shown in (2) of FIG. 3, a part of each of the openings 31a and 32a is in a state of hiding the other.

  Of course, the perforated plates 31 and 32 move relative to each other along the plane direction, but they should not be separated from each other during the movement. This is because the air volume must be adjusted depending on the degree of overlap of these perforated plates 31 and 32. For this reason, in the best mode shown in FIG. 3, the pressing rail 12 is fixed to the surface of the frame 10 or the first porous plate 31 opposite to the filter 20, that is, the upstream side of the air. Thus, the second perforated plate 32 is placed close to the first perforated plate 31. In this embodiment, in order to fix the relative movement of the perforated plates 31 and 32 after manual adjustment, for example, a guide elongated hole 32b is formed on the second perforated plate 32 side. Further, a guide pin or the like fixed to the first perforated plate 31 side is engaged.

  Moreover, in the above description, the case where two sheets of the first porous plate 31 and the second porous plate 32 are used as the porous plate has been described. For example, in the two first porous plates 31 connected to each other, A configuration in which one second perforated plate 32 is inserted to ensure stability when the two are moved relative to each other, that is, three perforated plates may be used.

  By the way, the perforated plates 31 and 32 can be aligned or displaced by a simple manual operation of moving the perforated plate from the back side of the coating chamber or by using an operation mechanism 40 described later. May be. As shown in FIG. 3, when the relative movement of the second porous plate 32 with respect to the first porous plate 31 is performed manually, a knob (not shown) is provided on the second porous plate 32 side to facilitate the operation. It is also possible to provide such as.

  In the filter unit 100, it is also preferable that the perforated plates 31 and 32 be arranged on the part of the frame body 10 facing the filter 20 while being separated from the filter 20 by a predetermined dimension. By installing in this way, it is possible to replace the filter 20 with a large depth when replacing the filter 20.

  As a result of the above, the filter unit 100 according to claim 1 is exposed in the painting chamber 210 of the painting booth 200 in the state shown in FIG. 3, and the first porous plate 31 or the second porous plate 32 is exposed. Thus, the air flow sent through the filter 20 flows into the coating chamber 210 as a uniform flow or laminar flow from the openings 31a or 32a formed in large numbers. Of course, when the air flow is reversed, the air in the coating chamber 210 sucked from the respective openings 31a or 32a formed in the first porous plate 31 or the second porous plate 32 (this air is also uniform). The liquid flows toward the filter unit 100 as a flow or a laminar flow) and is sucked into the filter 20 as a uniform flow or a laminar flow.

  The air volume toward or from the filter unit 100 is adjusted by changing the relative positions of the first perforated plate 31 and the second perforated plate 32. For example, the adjustment is performed in the best mode. In some cases, this can be easily performed by moving the second porous plate 32 in the surface direction. Since the movement of the second porous plate 32 can be performed in the surface direction of the first porous plate 31, that is, on the same surface, it is very easy.

  Of course, since the filter unit 100 is used alone or in combination, if one of the same size is prepared, the filter unit 100 can be of any size with the above function. It can correspond to the painting booth 200.

  Therefore, the filter unit 100 according to the first aspect can form a uniform flow or a laminar flow and can easily adjust the air flow locally and easily. It can also be applied to rooms such as a large-scale painting booth 200.

In order to solve the above problems, the means taken by the invention according to claim 2 is about the filter unit 100 according to claim 1 above.
“The ratio of the total area of each opening 31a and 32a is 15% to 70% with respect to the area of each porous plate 31 and 32”
It is.

  That is, in the filter unit 100 according to the second aspect, the ratio of the total area of the openings 31a and 32a is 15 with respect to the area of the porous plates 31 and 32. % To 70%.

  This is because the air flow and laminar flow are formed through the perforated plates 31 and 32, and the air volume is adjusted. This is because it must be done efficiently.

  In that sense, if the ratio of the total area of the openings 31a and 32a to the porous plates 31 and 32 is less than 15% of the area of the porous plates 31 and 32, the openings 31a and 32a are fully opened. However, since the laminar flow and air flow formed are small, the efficiency is poor. On the contrary, when the ratio of the total area of the openings 31a and 32a to the porous plates 31 and 32 exceeds 70% of the area of the porous plates 31 and 32, the rigidity of the porous plates 31 and 32 is increased. It becomes low and the operativity at the time of making the relative movement of the 1st perforated panel 31 or the 2nd perforated panel 32 will become very bad. In that sense, as the ratio of the total area of the openings 31a and 32a to the porous plates 31 and 32, it is most effective to be in the state shown in FIG. It is 50%, and it is still more preferable that it is 25-40%.

  Therefore, the filter unit 100 according to the second aspect not only exhibits the same function as that of the first aspect, but also can effectively make the laminar flow and air flow formed therethrough.

In order to solve the above problems, the means taken by the invention according to claim 3 is the filter unit 100 according to claim 1 or 2,
"The shape and arrangement interval of the openings 31a and 32a formed in the perforated plates 31 and 32 are the same."
It is that.

  That is, the filter unit 100 according to claim 3 is configured such that the openings 31a and 32a formed in the perforated plates 31 and 32 have the same interval and the same shape. As a result, as shown in FIG. 3, when the air volume is adjusted by the relative movement of the first perforated plate 31 and the second perforated plate 32, the opening area of the overlapping portion of the holes can be changed gently. It can be done with very simple operations and efficiently.

  Therefore, the filter unit 100 according to claim 3 can perform the same function as that of claim 1 or claim 2, and can easily adjust the laminar flow and air flow formed therethrough. It is.

In order to solve the above-mentioned problems, the means taken by the invention according to claim 4 is the filter unit 100 according to any one of claims 1 to 3,
“The relative movement operation of each of the perforated plates 31 and 32 is performed from the filter 20 side by the operation mechanism 40 provided in the frame body 10”.
It is.

  That is, in the filter unit 100 according to the fourth aspect, the relative movement operation of the perforated plates 31 and 32 is performed from the filter 20 side by the operation mechanism 40 provided on the frame body 10. The opening / closing operation of the opening 31a or 32a can be performed efficiently and quantitatively while confirming the laminar flow state, the wind speed, and the air volume on the interior side of the working chamber such as painting.

  The operating mechanism 40 has the form as in claim 5 described below, as well as the modifications illustrated in FIGS. 8 and 9, and other modifications as illustrated in FIGS. 11, 12, 13, and 14. Can be used.

  As described above, the relative movement operation of the perforated plates 31 and 32 is performed from the filter 20 side by the operation mechanism 40 provided in the frame body 10, whereby the flow rate of each filter unit 100 is adjusted. The worker inside can check while checking the wind speed and air volume. This is because the filter 20 is normally exposed directly to the coating chamber 210 side, and the opening / closing operation of the opening 31a or 32a in each filter unit 100 can be performed efficiently and quantitatively in a wide space of the coating chamber 210. is there.

  In other words, according to the filter unit 100 of the fourth aspect, it is not necessary to perform the relative movement operation of the perforated plates 31 and 32 inside the exhaust duct 220 or outside the coating booth 200, for example, a narrow space. Therefore, there is no need to provide an extra space for operation in the exhaust duct 220.

  Therefore, the filter unit 100 according to the fourth aspect exhibits the same function as that according to any one of the first to third aspects, and the relative movement operation of the perforated plates 31 and 32 is performed in the coating chamber 210 or the like. It can be done in a wide space.

And in order to solve the above subject, the means which invention based on Claim 5 took about filter unit 100 of the above-mentioned Claim 4,
“The operation mechanism 40 has one end 41a connected to one of the perforated plates 31 and 32, an intermediate portion 41b extending near the outer periphery of the filter 20, and the other end 41c supported by the frame 10. It was constituted by an operating body 41 provided with a knob 42 protruding to the filter 20 side.
It is.

  That is, in the filter unit 100 according to the fifth aspect, as shown in FIGS. 6 to 14, one end 41 a is connected to one of the perforated plates 31 and 32, and the intermediate portion 41 b extends near the outer periphery of the filter 20. The other end 41c is provided by an operating mechanism 40 constituted by an operating body 41 provided with a knob 42 protruding toward the filter 20 supported by the frame body 10.

  Thereby, in the filter unit 100 of this claim 5, the relative movement operation of each of the perforated plates 31 and 32 is performed by moving the knob 42 exposed in the coating chamber 210 in the left-right direction, or putting it in and out, Or it can be done only by turning. For example, as shown in FIG. 7 (2) or FIG. 9, the knob 42 can be easily adjusted in opening degree only by moving in the adjustment hole 13 formed on the frame body 10 side.

  In the operation mechanism 40 shown in FIG. 6, when the knob 42 is moved, the entire plate-like operating body 41 moves in parallel outside the filter 20, and the second porous plate 32 connected to one end 41 a of the operating body 41 is provided. It is moved. Further, in the operation mechanism 40 shown in FIG. 8, when the knob 42 is moved, the other end 41c of the operation plate 41 is swung, and accordingly, the intermediate bar 41e is rotated as indicated by an arrow in FIG. . Then, since the intermediate plate 41g connected to the intermediate rod 41e swings around the intermediate rod 41e, the second porous plate 32 connected to the one end 41a of the operating body 41 moves. Of course, since a slot is formed in the connecting portion between the one end 41a and the second porous plate 32 as shown in FIG. 9, the swinging motion of the operation plate 41 becomes the reciprocating motion of the second porous plate 32. Converted.

  Therefore, the filter unit 100 according to the fifth aspect exhibits the same function as that according to the fourth aspect, and can reliably perform the relative movement operation of the perforated plates 31 and 32 in a wide space such as the coating chamber 210.

As described above, in the present invention,
“A filter unit 100 that includes an air purification filter 20 and a frame 10 that supports the filter 20 and is disposed indoors for supply or exhaust,
At least two perforated plates 31 and 32 arranged to overlap each other are provided on the part of the frame 10 facing the filter 20 so as to be relatively movable,
By relatively moving these perforated plates 31 and 32 along the surface direction, the overlapping degree of the openings 31a and 32a formed in the perforated plates 31 and 32 is changed, and the air volume of the air passing through the filter 20 is changed. It was possible to make adjustments. ''
This makes it possible to form a uniform air flow and laminar flow, as well as to adjust the air flow locally and easily, making it suitable for both small and large paint booths. Alternatively, it is possible to provide the filter unit 100 applicable to each room such as a clean room or a hospital.

  Next, the invention according to each claim configured as described above will be described based on the best mode shown in the drawings. FIG. 1 illustrates a painting booth 200 employing the filter unit 100 according to the present invention. It is. The painting booth 200 is, for example, a large one that paints an automobile or a large structure. However, by changing the assembly method of the filter unit 100 described below, the painting booth 200 is a small one suitable for small structures such as furniture. You can also

  Further, as shown in FIG. 2, a painting chamber 210 is formed in the painting booth 200. In the painting chamber 210, as shown in FIG. A wall formed by assembling a large number of such filter units 100 faces. The rear side of the wall made up of a large number of filter units 100 is an intake or exhaust duct 220 as shown in FIG.

  As shown in FIGS. 3 to 5, the filter unit 100 includes a filter 20 and a frame body 10 that supports the filter 20, and the frame body 10 includes at least two perforated plates 31 and 32. Are provided so as to be relatively movable.

  As described above, the filter unit 100 may be used alone, but a plurality of or many of the filter units 100 are connected to each other on the outer peripheral surface of the frame body 10, thereby having a large area as shown in FIG. Of course, it can also be configured to have a certain height as shown in FIG.

  As shown in FIGS. 3 to 5, the frame body 10 constituting the filter unit 100 has a square shape when viewed from the first porous plate 31 and the second porous plate 32 side, and connects a large number of them. In order to facilitate, it is formed in a so-called box shape. In the frame 10, as shown in FIG. 5, a door 11 is provided on the filter 20 side, and by opening and closing the door 11, the attachment and replacement of the filter 20 in the first perforated plate 31 and This can be performed independently of the second porous plate 32.

  Although the material of the said frame 10 is not specifically limited, If it is a metal, it is preferable and it is more preferable to manufacture from a steel plate. Further, the material of the first porous plate 31 and the second porous plate 32 is not particularly limited, and a metal (iron, aluminum, etc.) plate or a resin plate can be used. However, considering lightness and durability, it is manufactured from aluminum. More preferably. The outer dimensions of the first perforated plate 31 and the second perforated plate 32 are not particularly limited, but are 200 to 1300 mm in both the width direction and the lateral direction, and practically adopt dimensions such as 305 mm and 610 mm, for example. Can do.

  Further, the shape of the opening provided in the first porous plate 31 and the second porous plate 32, the arrangement interval of the openings, the ratio of the opening area, and the like are not particularly limited, but the shape of the hole is as shown in FIG. It is preferable that the hole is a long hole having a long diameter in the direction perpendicular to the moving direction of the porous plate. Moreover, it is preferable that the holes are equally spaced.

  The filter 20 is generally used in this kind of painting booth 200, and is not particularly limited. However, if the filter 20 is only a HEPA filter obtained by pleating a high-performance filter medium made of glass fiber or organic fiber. It is also possible to use a bulky flat dust filter in which relatively thick fibers are three-dimensionally oriented.

  Specifically, for example, for exhaust of a paint booth, a bulky flat medium performance filter made of a nonwoven fabric in which relatively thin fibers are three-dimensionally oriented is suitable. Alternatively, a filter element obtained by pleating a relatively thin medium performance filter made of the three-dimensionally oriented nonwoven fabric is suitable. Specific examples of such a nonwoven fabric include, for example, 5 to 50% by mass of ultrafine fibers having an average fiber diameter of 0.1 to 10 μm and a heat-fusible fiber having an average fiber diameter of 10 to 100 μm manufactured by a melt blow method. There is a filter medium made of a nonwoven fabric in which 50 to 95% by mass is mixed and the heat-fusible fiber is fused. By using such a filter medium, it is possible to obtain a medium performance filter having a JIS colorimetric efficiency of 40% or more. This efficiency is more preferably 55 to 75%. If it exceeds 75%, pressure loss may increase and energy loss may increase, and if it is less than 55%, removal of dust and mist of paint becomes insufficient. There is a case. The JIS colorimetric efficiency is a value obtained by a test prescribed in JIS B 9908.

  As shown in FIGS. 3 to 5, each of the perforated plates 31 and 32 is literally plate-shaped having openings 31 a and 32 a for passing air from the filter 20 or air toward the filter 20. As shown in FIGS. 4-6, it is assembled | attached to the frame 10 side so that a mutual movement is possible. When these perforated plates 31 and 32 are completely overlapped, as shown in FIG. 3 (1), the openings 31a and 32a are in a state of being coincident with each other, and they are slightly shifted from each other. In this case, as shown in (2) of FIG. 3, a part of each of the openings 31a and 32a hides the other.

  Further, in the best mode shown in FIG. 3, the perforated plates 31 and 32 have the holding rail 12 on the surface of the frame 10 or the first perforated plate 31 opposite to the filter 20, that is, on the upstream side of the air. The second perforated plate 32 is installed close to the first perforated plate 31 by the holding rail 12. In this example, a guide elongated hole 32b is formed on the second porous plate 32 side in order to fix the relative movement of the perforated plates 31 and 32 after manual adjustment, and the guide elongated hole 32b is formed in the guide elongated hole 32b. A guide pin or the like fixed on the first porous plate 31 side is engaged.

  Further, in the filter unit 100, the perforated plates 31 and 32 are arranged in a portion of the frame body 10 facing the filter 20 while being separated from the filter 20 by a predetermined dimension. In other words, the filter 20 is disposed in a state where it does not adhere to the first porous plate 31 or the second porous plate 32.

  This filter unit 100 can be used for both air supply and exhaust. As shown in FIG. 4, in the case of air supply into the booth room, the direction of air flow is indicated by an arrow. The two porous plates 32 (for movement), the first porous plate 31 (for fixing), and the main filter 20 (for coarse dust) are arranged so that air flows in this order. In the case of exhaust from the booth room, the pre-filter (for coarse dust), the main filter 20 (for fine dust), the second porous plate 32 (for movement), and the first porous plate 31 (for fixing) are arranged in this order. Is arranged to flow. That is, it is preferable that a pre-filter is disposed on the upstream side of the air flow, and that the second porous plate 32 (for movement) is disposed on the upstream side. By closely contacting the porous plate 31 (for fixing), the air flow can be stabilized.

  By the way, in order to match or shift the perforated plates 31 and 32, simple manual work may be used. However, in the best mode, if the filter side, the operation mechanism 40 is used by remote operation. The operating mechanism 40 includes a first embodiment shown in FIGS. 6 and 7, a second embodiment shown in FIGS. 8 and 9, a third embodiment shown in FIGS. Various forms such as the fourth embodiment and the fifth embodiment shown in FIG. 14 are conceivable.

(First embodiment of the operating mechanism 40)
6 and 7, the one end 41a is connected to one of the perforated plates 31 and 32, the intermediate part 41b extends near the outer periphery of the filter 20, and the other end 41c This is constituted by a plate-like operating body 41 provided with a knob 42 protruding toward the filter 20 supported by the frame body 10. In these drawings, the plate-like operating body 41 is formed by bending a flat plate.

  Thereby, in this operation mechanism 40, the relative movement operation of each of the perforated plates 31 and 32 can be performed only by moving the knob 42 exposed in the coating chamber 210 in the left-right direction. In this case, as shown in FIG. 7 (2), the knob 42 is simply moved in the adjustment hole 13 formed on the frame body 10 side, and the opening degree adjustment and the confirmation of the movement dimension can be easily performed. It can be done. That is, in the operation mechanism 40 shown in FIG. 6, when the knob 42 is moved, the entire operating body 41 is translated in parallel outside the filter 20, and the second perforated plate 32 connected to one end 41a of the operating body 41 is moved. It is. In addition, a long hole 41d is formed in the other end 41c of the operating body 41, and the movement in the illustrated horizontal direction is performed by a fixing screw 41f (attached to the frame body 10 side) that engages in the front hole 41d. It is stable and can be fixed.

(Second embodiment of the operation mechanism 40)
The operation mechanism 40 shown in FIGS. 8 and 9 is similar in structure to that of the first embodiment described above. However, when the knob 42 is moved, the other end 41c of the operating body 41 is swung. Accordingly, the intermediate bar 41e is rotated as indicated by an arrow in FIG. Then, the intermediate plate 41g connected to the intermediate rod 41e swings around the intermediate rod 41e, and the second porous plate 32 connected to the one end 41a of the operating body 41 moves. Of course, the connecting portion between the one end 41a and the second porous plate 32 is formed with a long hole as shown in FIG. 9, so that the swinging motion of the intermediate plate 41g is reciprocating with the second porous plate 32. Converted.

  In the operation mechanism 40 of the second embodiment, as shown in FIG. 8, the intermediate portion 41b of the operating body 41 is a rotating intermediate rod 41e. Must be pivotally supported. Therefore, in this example, a bracket 14 is erected in the frame body 10, and the intermediate rod 41e is rotatably supported by the bracket 14.

  As shown in FIG. 9, the other end 41c of the operating body 41 extends in the lateral direction to rotate the intermediate bar 41e, and the horizontal movement of the knob 42 is caused by the horizontal movement of the intermediate bar 41e. It turns into a rotational movement. An elongated hole 41d is formed in the other end 41c, and the movement in the illustrated horizontal direction is stabilized by a fixing screw 41f (attached to the frame body 10 side) that engages in the elongated hole 41d, and It can be fixed.

(Third embodiment of the operation mechanism 40)
The operation mechanism 40 shown in FIGS. 10 to 13 is also substantially the same as that of the first embodiment and the second embodiment, but the basic idea is as shown in FIG. The swinging rod 44 connected to the second porous plate 32 is swung by rotating the knob 42 and the operation rod 43 connected to the knob 42 about the axis of the operation rod. Of course, as shown in FIG. 12, a slot 44 a is formed in the connecting portion with the second perforated plate 32, so that the swinging motion of the swinging rod 44 is converted into the reciprocating motion of the second perforated plate 32. .

(Fourth embodiment of the operation mechanism 40)
The operating mechanism 40 according to the fourth embodiment shown in FIG. 13 is to rotate an “L-shaped” crank arm 45 that is rotatably fixed in the frame body 10. One end of the crank arm 45 is connected to the knob 42 via a wire or bar 45a, and the other end is connected to the second perforated plate 32 via a connecting rod 45b.

  As a result of the above, by pushing and pulling the knob 42, the "L-shaped" crank arm 45 is rotated as shown by the arrow in FIG. 13, and the connecting rod 45b is moved accordingly. Thus, the second perforated plate 32 is reciprocated.

(Fifth embodiment of the operation mechanism 40)
The operating mechanism 40 according to the fifth embodiment shown in FIG. 14 rotates a knob 42 provided at the other end of the operating body 41, thereby turning the swing arm 46a connected to the knob 42 and the swing arm. A first rod (provided in the air flow direction, not shown) connected to 46a, a second rod 46b connected to the first rod, and a second perforated plate 32 connected to the end of the first rod are sequentially provided. In operation, the second perforated plate 32 is reciprocated.

It is a partial side view of the painting booth to which the filter unit according to the present invention is applied. It shows the inside of the painting booth shown in FIG. 1, (1) is a front view of the wall seen from the painting chamber, (2) is a longitudinal sectional view of (1). The filter unit which concerns on this invention is shown, (1) is a front view of the state in which each opening corresponded, (2) is a front view in the state in which each opening shifted | deviated mutually. FIG. 4 is a side view of the filter unit shown in FIG. 3. FIG. 4 is a plan view of the filter unit shown in FIG. 3. It is a partial expanded side view which shows the operation mechanism which concerns on 1st Example. FIG. 2 shows an operation mechanism according to the first embodiment, wherein (1) is a partially enlarged plan view seen from the direction of the arrow 1 in FIG. 6, and (2) is seen from the direction of the arrow 2 in FIG. It is a front view of the part shown by. It is a partial expanded side view which shows the operation mechanism which concerns on 2nd Example. It is the partial expansion front schematic which shows the operation mechanism which concerns on 2nd Example. The thing which changed the assembly method of the filter unit which concerns on this invention is shown, (1) is a partial front view, (2) is sectional drawing. The cross section of the same filter unit is shown, (1) is a partially enlarged view of line 4-4 in FIG. 10, (2) is a partially enlarged view of line 5-5 in FIG. FIG. 12 is a partially enlarged perspective view showing an operation mechanism according to a third embodiment used in FIG. 11. It is a partial expanded side view which shows the operation mechanism which concerns on 4th Example. It is a front view which shows the operation mechanism which concerns on 5th Example. It is sectional drawing of the painting booth which shows the prior art. It is a partial enlarged plan view which shows the partition plate used in the prior art of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Filter unit 10 Frame 11 Door 12 Holding rail 13 Adjustment hole 14 Bracket 20 Filter 31 1st perforated plate 31a Opening 32 2nd perforated plate 32a Opening 32b Guide long hole 40 Operation mechanism 41 Actuator 41a One end 41b Middle part 41c Other end 41d long hole 41e intermediate rod 41f fixing screw 41g intermediate plate 42 knob 43 operation rod 44 swing rod 44a long hole 44b connecting pin 45 crank arm 45a wire or rod 45b connecting rod 200 painting booth 210 painting chamber 220 exhaust duct

Claims (5)

A filter unit that includes an air purification filter and a frame that supports the filter, and is arranged for air supply or exhaust in a room,
At least two perforated plates arranged on top of each other on the part of the frame facing the filter are provided so as to be relatively movable,
The amount of air passing through the filter can be adjusted by changing the degree of overlap of the openings formed in each porous plate by relatively moving these porous plates along the surface direction. Filter unit.   2. The filter unit according to claim 1, wherein the ratio of the total area of the openings is 15% to 70% with respect to the area of each porous plate.   The filter unit according to claim 1 or 2, wherein the shape and arrangement interval of each opening formed in each porous plate are the same.   The filter unit according to any one of claims 1 to 3, wherein a relative movement operation of each porous plate is performed from the filter side by an operation mechanism provided in the frame.   The operation mechanism has one end connected to one of the perforated plates, an intermediate portion extending near the outer periphery of the filter, and the other end protruding to the filter side supported by the frame. The filter unit according to claim 4, wherein the filter unit is configured by an operating body provided with a knob.

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