JP2007209958A - Air filter and method for manufacturing air filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air filter capable of maintaining high strength even if the air filter is enlarged. <P>SOLUTION: The air filter 10 comprises a filter frame 20 composed of a lower frame 11, an upper frame 12, a left side frame 13, and a right side frame 14. The left side frame 13 and the right side frame 14 are respectively formed while being divided into a first and a second divided left side frames 24 and 25 and a first and a second divided right side frames 26 and 27. A joining frame 15 bridges over both side frames 13 and 14 and at the same time is held in the respective side frames 13 and 14 by being sandwiched between the first and the second divided left side frames 24 and 25 and the first and the second divided right side frames 26 and 27. A filter medium 17 is set in the respective spaces 50 and 51 partitioned by the filter frame 20 and the joining frame 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air filter and an air filter manufacturing method, and more particularly to a large air filter and a large filter manufacturing method.

  In a building air conditioner, a clean room, a semiconductor manufacturing apparatus, etc., it is known to use an air filter to collect airborne particulate matter. The air filter is usually formed by fixing a filter medium inside a rectangular or rectangular filter frame, and suspended particulate matter in the air is captured by the filter medium.

  In recent years, in order to reduce the cost of clean rooms, large FFUs (3 feet x 3 feet) have been demanded for the purpose of reducing the number of fan filter units (FFU) used and reducing their installation work cost and product unit price. Along with this, each air filter constituting the FFU is being requested to have a large size. However, as the air filter grows larger, not only its dimensions, but also its own weight increases, so there is a greater possibility that the filter will be deformed when carrying or mounting it, and the filter medium may be damaged by such deformation. There is.

As described in Patent Document 1, a stacked forming filter formed by stacking unit filters each having a filter medium sandwiched between upper and lower flanges is mounted in a filter frame, and a connector between upper and lower adjacent flanges is a connector. Are joined to form a filter. Since each unit filter has upper and lower flanges, the stacked formation filter can secure a certain degree of strength and can be increased in size by stacking a plurality of unit filters.
Japanese Patent Laid-Open No. 10-192631

  However, in the filter of Patent Document 1, each flange that sandwiches the unit filter is spanned between both side frames of the filter frame, but is not fixed to each side frame, and the flange and the side frame are integrally formed. It has not been. Therefore, the strength of the filter frame is not sufficient, and when the filter is enlarged, there is a problem that the filter frame is deformed when the filter is transported and attached, and the filter medium is damaged due to the deformation.

  Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a high-strength air filter in order to prevent the filter medium from being damaged when the filter is enlarged. .

  An air filter according to the present invention includes an upper frame and a lower frame extending in parallel to each other, and a filter frame formed by both side frames including a plurality of divided side frames divided in the vertical direction by straight lines parallel to the upper frame and the lower frame. And passed between both side frames, sandwiched between the divided side frames in each side frame, and arranged in each space partitioned by the connection frame held by each side frame, the filter frame and the connection frame, A filter frame and a filter medium fixed to the connection frame.

  For example, a bent portion that bends by 90 ° toward the outside of the filter frame is provided at an end portion in the vertical direction of the divided side frame that sandwiches the connection frame. And it is preferable that a connection frame is hold | maintained at each side frame by being clamped by the bending part. Thereby, since a connection frame is clamped by the bent surface of each side frame, it can fix reliably between side frames. The bent portions provided at both end portions in the thickness direction and / or both end portions in the vertical direction are formed, for example, by bending each plate-like frame. For example, it is integrally formed in each frame by integral molding. The connecting frame is preferably fastened to each side frame by a fastening member such as a screw or a rivet.

  Each side frame is composed of, for example, two divided side frames, but of course may be composed of three or more divided side frames. In the present invention, the size of the air filter can be further increased by increasing the number of divided side frames.

  The plurality of divided side frames include first and second divided side frames that are adjacent to each other in the vertical direction. Each of the first and second divided side frames is provided with a lower screw receiver and an upper screw receiver extending in the vertical direction, and screws for fixing the connecting frame to each divided side frame. The lower screw receiver and the upper screw receiver preferably have different positions in the thickness direction of the filter. According to such a configuration, the connecting frame can be fixed to the first and second divided side frames without providing the above-described bent portion. Moreover, a division | segmentation side frame can be manufactured by extrusion molding, and a lower side screw receptacle and an upper side screw receptacle can also be comprised so that it may extend from the upper end to a lower end of a 1st and 2nd division | segmentation side frame, respectively.

  In this case, the first and second divided side frames may have different cross-sectional shapes, but may be the same. When the cross-sectional shape is the same, a plurality of lower screw receivers and upper screw receivers are provided asymmetrically in the thickness direction with respect to the center position in the thickness direction of the filter in each of the first and second divided side frames. It is preferred that The first divided side frame is disposed by rotating 180 ° about the connecting frame with respect to the second divided side frame, whereby the lower screw receiver and the upper screw receiver are positioned in the thickness direction of the filter. Are arranged differently.

  The plurality of divided side frames include a lower divided side frame fixed to the lower frame and an upper divided side frame fixed to the upper frame. The lower and upper divided side frames are preferably provided with first and second screw holders extending in the vertical direction to which screws for fixing the lower frame and the upper frame are screwed. The lower frame and the upper frame are respectively provided with third and fourth screw supports extending in the direction in which the lower frame and the upper frame extend, and the first and third screw supports are positioned in the thickness direction of the filter. However, it is preferable that the second and fourth screw receivers also have different positions in the thickness direction of the filter. In this case, the screws are not screwed into the third and fourth screw receivers, but the lower frame and the upper frame can have the same cross-sectional shape as the upper divided side frame and the lower divided side frame, respectively. When these frames are formed by extrusion molding, the lower frame and the upper divided side frame can be manufactured using the same mold. Similarly, the upper frame and the lower divided side frame can be manufactured using the same mold.

  For example, the lower divided side frame and the lower frame have different cross-sectional shapes, so that the positions of the first and third screw holders in the thickness direction of the filter are different, and the upper divided side frame and the upper frame are also mutually different. Due to the different cross-sectional shapes, the positions of the second and fourth screw receivers in the thickness direction of the filter are different.

  Of course, the lower frame may have the same cross-sectional shape as the lower divided side frame, and the upper frame may have the same cross-sectional shape as the upper divided side frame. In this case, in each of the lower divided side frame, the upper divided side frame, the lower frame, and the upper frame, the first to fourth screw supports are asymmetric in the thickness direction with respect to the center position in the thickness direction of the filter. It is better to have more than one. Then, the lower frame is inverted with respect to the center position in the thickness direction so that the third screw receiver is different from the first screw receiver in the thickness direction of the filter. It is attached. Similarly, the upper frame is attached to the upper divided side frame by being inverted with respect to the center position in the thickness direction so that the position of the filter in the thickness direction of the fourth screw receiver is different from that of the second screw receiver. .

  The method for manufacturing an air filter according to the present invention includes an upper frame, a lower frame, and a filter frame formed by both side frames each including at least a first and a second divided side frame divided in the vertical direction. This is a method of manufacturing an air filter in which a connection frame passed between the frames is provided, and a filter medium is disposed in each of the spaces defined by the filter frame and the connection frame. And this manufacturing method fixes the 1st division | segmentation side frame to each of the upper surface of the both ends of the right and left of a lower frame, and arrange | positions the filter medium in the space divided by the lower frame and the 1st division | segmentation side frame. And connecting the connecting frame to the upper ends of the two first divided side frames fixed to the lower frame, and further disposing second divided side frames on the upper surfaces of the left and right ends of the connecting frame, The second step of fixing the first and second divided side frames to the connecting frame, and the filter medium is disposed in the space defined by the connecting frame and the second divided side frame, and the two second divided frames. And a third step of spanning the connecting frame or the upper frame to the upper end of the side frame.

  According to the manufacturing method of the present invention, in the third step, when each side frame is composed of two divided side frames, the upper frame is arranged on the upper ends of the two second divided side frames, and the upper frame is 2 It is fixed to the upper ends of the two second divided side frames. On the other hand, when each side frame is composed of three or more divided side frames, a connecting frame is further arranged at the upper ends of the two second divided side frames, and the third divided side is placed on the connecting frame. A frame is arranged, and a space for arranging the third filter medium is formed. A connecting frame may be further arranged at the upper end of the third divided side frame, or an upper frame may be arranged.

  According to the present invention, the connecting frame passed to the both side frames is strongly held by the both side frames by being sandwiched between the divided side frames divided in the vertical direction, so that the strength of the air filter can be improved. In addition, even a large-sized air filter can provide a high-strength air filter with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the vertical and horizontal directions in FIG.

  FIG. 1 is a front view of the air filter according to the first embodiment. The air filter 10 according to this embodiment includes a lower frame 11, an upper frame 12, a left frame 13, and a right frame 14, and includes a filter frame 20 that has a substantially square shape. The lower frame 11 and the upper frame 12 extend in the left-right direction X in parallel with each other, and the left frame 13 and the right frame 14 extend in the vertical direction H in parallel with each other. The left frame 13 connects the left ends of the lower frame 11 and the upper frame 12, and the right frame 14 connects the lower ends of the lower frame 11 and the upper frame 12.

  The left frame 13 is divided into two equal parts vertically by a straight line L extending in the left-right direction X. From the first divided left frame 24 disposed on the lower side and the second divided left frame 25 disposed on the upper side. Composed. Similarly, the right frame 14 is divided into two equal parts in the vertical direction by a straight line L, and includes a first divided right frame 26 and a second divided right frame 27.

  A connecting frame 15 is passed between the left frame 13 and the right frame 14. The connecting frame 15 is sandwiched and fixed between the first and second divided side frames 24 and 25 in the left frame 13, and is thereby held by the left frame 13. Similarly, the connecting frame 15 is sandwiched and fixed between the first and second divided side frames 26 and 27 in the right frame 14, and is thereby held by the right frame 14. Each frame of the filter frame 20 (the lower frame 11, the upper frame 12, the left frame 13, and the right frame 14) and the connection frame 15 each have a plate shape.

  In the spaces 50 and 51 defined by the filter frame 20 and the connection frame 15, the filter medium 17 is disposed. The filter medium 17 is formed in a pleat shape by folding the filter medium on the sheet, and is disposed in each of the spaces 50 and 51 so that the fold extends in the vertical direction. In each of the spaces 50 and 51, face guards 18 are provided on the front and back surfaces (front and rear of the paper surface in FIG. 1) of the filter medium 17, and the filter medium 17 is protected by the face guard 18. The filter medium 17 and the face guard 18 are fixed to the inner surface of each frame of the filter frame 20 or the upper surface and the lower surface (fixed surface) of the connecting frame 15 with an adhesive.

  On the inner surface of each frame of the filter frame 20 or the upper and lower surfaces of the connecting frame 15 (that is, the fixing surfaces to which the filter medium 17 is fixed), both ends of the filter in the thickness direction D (see FIG. 2) A guard part 30 extending along the line is provided. The guard part 30 prevents the adhesive from flowing out from the fixing surface of each filter frame 20.

  In the present embodiment, for example, glass fiber, synthetic resin fiber, PTFE (polytetrafluoroethylene) or the like is used as the material of the filter medium 17. The filter frame 20 and the connection frame 15 are formed of a metal plate such as an aluminum plate, a galvanized steel plate, or a stainless steel plate, a synthetic resin, or the like. The face guard 18 is made of a metal such as an aluminum plate. Furthermore, as the adhesive, for example, urethane resin is used.

  FIG. 2 is a side view of the air filter. FIG. 3 is a bottom view of the lower frame 11. FIG. 4 is a side view of the first divided left side frame 24. The lower frame 11 has a plate shape as described above, and the first bent portion 11B is bent at both ends in the thickness direction D of the filter by 90 ° from both ends downward (that is, outside the filter), A second bent portion 11C that is bent by 90 ° from the first bent portion 11B toward the inside in the thickness direction D is formed, and has a U-shaped cross section. Similarly, the first and second bent portions 12B and 12C are formed at both ends in the thickness direction D of the upper frame 12 to exhibit a U-shaped cross section.

  As shown in FIG. 3, the first bent portion 11B is provided in the lower frame 11 from the left end portion 11L to the right end portion 11R, but the second bent portion 11C is notched at the left end portion 11L and the right end portion 11R. The left end portion 11L and the right end portion 11R are not provided. In addition, three through holes 38 penetrate through the left end portion 11L and the right end portion 11R of the lower frame 11 in the height direction H, respectively. In addition, since the 1st and 2nd bending parts 12B and 12C of the upper frame 12 have the same structure, the description is abbreviate | omitted. Similarly, through holes 36 (see FIG. 8) are provided in both end portions 12R and 12L of the upper frame 12.

  Similarly to the lower frame 11, the first and second divided left side frames 24 and 25 are also bent by 90 ° at both ends in the thickness direction D to the outside of the filter (front side in FIG. 2). The first bent portions 24B and 25B and the second bent portions 24C and 25C bent 90 ° further inward in the thickness direction D from the first bent portions 24B and 25B are formed, and the U-shaped cross section is formed. Presents.

  As shown in FIG. 4, the first bent portion 24B is provided from the upper end 24U to the lower end 24S along the end in the thickness direction D. The second bent portion 24C includes the upper end 24U and the lower end. The portion 24S is notched and is not provided at the upper end 24U and the lower end 24S. In addition, since the 1st and 2nd bending parts 25B and 25C of the 2nd division | segmentation left side frame 25 also have the same structure, the description is abbreviate | omitted.

  The upper end 24U of the first divided left frame 24 is provided with a third bent portion 24E that is bent by 90 ° to the outside of the filter (the front side in FIG. 2 and FIG. 4). Similarly, the lower end portion 25S is provided with a fourth bent portion 24F that is bent 90 ° outside the filter. Similarly, in the second divided left side frame 25, third and fourth bent portions 25E and 25F are provided at the upper and lower ends thereof.

  In the first divided left side frame 24, each of the third and fourth bent portions 24E and 24F has both ends in the thickness direction D and upper and lower ends in the height direction H of the first bent portion 24B. Are joined together. Thereby, the 1st division | segmentation left side frame 24 is formed in box shape (refer FIG. 8) by the outer surface 24G and 1st, 3rd, and 4th bending part 24B, 24E, 24F. Similarly, in the second divided left side frame 25, the bent portions 25E and 25F are joined to the bent portion 25B, thereby the outer surface 25G and the first, third, and fourth bent portions 25B, 25E, and 25F. , Formed in a box shape (see FIG. 8). The third and fourth bent portions 24E, 25E, 24F, and 25F are each provided with three through holes 31E, 32E, 31F, and 32F that penetrate in the height direction H (see FIG. 8). The first and second divided right frames 26 and 27 have the same configuration as the first and second divided left frames 24 and 25.

  FIG. 5 shows a cross-sectional view of the lower frame 11. As shown in FIG. 5, the guard portions 30 provided at both ends in the thickness direction D of the upper surface 11 </ b> U have an L-shaped cross section including a base surface 41 and a rising surface 42. The lower surface of the base surface 41 is fixed to the upper surface 11U, and the rising surface 42 is provided so as to rise from the outermost edge portion 11E of the upper surface 11U in the thickness direction D. As described above, the first and second bent portions 11B and 11C are provided at both end portions in the thickness direction D on the lower surface 11S side of the lower frame 11. The guard portion 30 is fixed to the lower frame 11 by welding, for example.

  As shown in FIG. 3, the guard portion 30 extends in the left-right direction X along each end portion in the thickness direction D, and the length in the left-right direction X is the length of the lower frame 11 in the left-right direction X. It is slightly shorter than that, and is not provided at the left end portion 11L and the right end portion 11R. Moreover, the guard part 30 which has the same shape is provided also in the lower surface 12S (refer FIG. 8) of the upper frame 12 in the both ends of the thickness direction D. As shown in FIG. Further, the same shape is formed at both end portions in the thickness direction D on the inner surfaces (fixed surfaces) of the first and second divided left frames 24 and 25 and the first and second divided right frames 26 and 27. A guard portion 30 is provided.

  FIG. 6 is a top view of the connecting frame 15, and FIG. 7 is a cross-sectional view of the connecting frame 15. Guard portions 30 are provided on both end portions in the thickness direction D on the upper surface 15U and the lower surface 15S of the connecting frame 15, respectively. Since the guard part 30 provided in the connection frame 15 is also the same structure as the guard part 30 provided in the lower frame 11 grade | etc., Description is abbreviate | omitted. Note that three through holes 34 that penetrate in the height direction H are provided in the left end portion 15L and the right end portion 15R of the connection frame 15, respectively.

  FIG. 8 is a partially exploded perspective view of the filter frame 20. However, in FIG. 8, the second bent portions 11C, 12C, 24C, and 25C are omitted for explanation. Hereinafter, the manufacturing method of the air filter in this embodiment is demonstrated using FIG.

  In the present embodiment, first, on the upper surface 11U of the left end portion 11L of the lower frame 11, the first divided left side so that the through hole 38 of the lower frame 11 matches the through hole 31F of the fourth bent portion 24F. A frame 24 is placed. Then, the bolts 39A (screws) are inserted into the matched through holes 38 and 31F, and the bolts 39A are screwed into the nuts 39B, whereby the first upper surface 11U of the left end portion 11L of the lower frame 11 is engaged with the first holes 11U. The divided left side frame 24 is fastened. Similarly, the first divided right frame 26 is fastened to the upper surface 11U of the right end portion 11R (see FIG. 3) of the lower frame 11 (see FIG. 1).

  Next, an adhesive is poured into the upper surface 11U of the lower frame 11. And the filter medium 17 and the face guard 18 (refer FIG. 1) are arrange | positioned in the space 50 (refer FIG. 1) divided by the lower frame 11, the 1st division | segmentation left side frame 24, and the 1st division | segmentation right side frame 26. FIG. At the same time, the lower side of the filter medium 17 and the face guard 18 is fixed to the lower frame 11 by an adhesive poured into the upper surface 11U. Note that the adhesive poured into the upper surface 11U is prevented from flowing out by the guard portion 30.

  Thereafter, the connecting frame 15 is arranged so as to span the upper ends of the first divided left frame 24 and the first divided right frame 26, and further on the upper surface 15U of the left end 15L of the connecting frame 15 A second divided left side frame 25 is arranged. Here, the connecting frame 15 and the second divided left side frame 25 are arranged such that the through hole 34 provided in the left end portion 15L of the connecting frame 15 is aligned with the through holes 31E and 32F.

  Bolts 35A (screws) are inserted into the matched through holes 31E, 34, and 32F, and the bolts 35A are screwed into the nuts 35B, whereby the left end portion 15L of the connecting frame 15 is the fourth bent portion. It is clamped and fastened by 25F and the 3rd bending part 24E. Similarly, the connection frame 15 is also clamped by being clamped by the first and second divided right frames 26 and 27.

  Next, an adhesive is poured onto the upper surface 15U of the connection frame 15. And the filter medium 17 and the face guard 18 are arrange | positioned in the space 51 (refer FIG. 1) divided by the connection frame 15, the 2nd division | segmentation left side frame 25, and the 2nd division | segmentation right side frame 27, and the filter medium 17 is the same. And the lower side of the face guard 18 is fixed to the connecting frame 15 by an adhesive poured into the upper surface 15U.

  Thereafter, the upper frame 12 is placed over the upper ends of the second divided left frame 25 and the second divided right frame 27 (see FIG. 1). Here, the left end portion 12L of the upper frame 12 is positioned above the third bent portion 25E so that the three through holes 36 provided therein coincide with the three through holes 32E of the third bent portion 25E. Placed. Then, the bolts 37A (screws) are inserted through the matched through holes 36 and 32E, and the bolts 37A are screwed into the nuts 37B, whereby the upper frame 12 is fastened on the second divided left frame 25. Is done. Similarly, the upper frame 12 is fastened to the upper end of the second divided right frame 27 (see FIG. 1).

  After confirming that the adhesive poured into the upper surfaces 11U and 15U has been sufficiently fixed, the filter frame 20 is turned upside down so that the upper frame 12 is disposed on the lower side. After the reversal, an adhesive is poured into the lower surface 12S of the upper frame 12 and the lower surface 15S of the connection frame 15, and the upper side of the filter media 17 and the face guard 18 disposed in the spaces 50 and 51 is moved to the lower surface by the adhesive. It is fixed to 12S and the lower surface 15S. At this time, since the guard portions 30 are provided at both ends of the lower surface 12S and the lower surface 15S in the thickness direction D, the adhesive does not flow out.

  After the adhesive poured into the lower surface 12S and the lower surface 15S is fixed, the filter frame 20 is then rotated 90 degrees so that the left frame 13 is disposed on the lower side. Next, an adhesive is poured onto the inner surfaces 24N, 25N of the first and second divided left frames 24, 25 of the left frame 13, and the left sides of the filter medium 17 and the face guard 18 are fixed to the left frame 13. Thereafter, the filter frame 20 is turned upside down so that the right frame 14 is disposed on the lower side, and similarly, the right side of the filter medium 17 and the face guard 18 is fixed to the right frame 14 (see FIG. 1). The adhesive not only fixes the filter medium 17 and the face guard 18 to the filter frame 20 and the connection frame 15 but also has a function as a seal material for the air filter 10.

  As described above, in the present embodiment, the connecting frame 15 is provided so as to pass the both side frames 13 and 14 of the filter frame 20, and the connecting frame 15 is divided vertically in the both side frames 13 and 14. Since it is sandwiched between the first and second divided side frames, the connecting frame 15 is firmly fixed to the side frames 13 and 14 of the filter frame 20. Therefore, the connecting frame 15 can sufficiently increase the rigidity of the filter frame 20. In the present embodiment, each frame of the filter frame 20 is provided with a bent portion that is bent to the outside of the filter. Therefore, the strength of each frame can be improved by the bent portion.

  In the left end portion 11L on the upper surface 11U of the lower frame 11, the guard portion 30 is not provided by the length in the left-right direction X of the fourth bent portion 24F of the first divided left frame 24. Therefore, when the first divided left frame 24 is placed on the upper surface 11U of the lower frame 11, the left end portion of the guard portion 30 on the upper surface 11U engages with the inner surface 24N of the first divided left frame 24. Similarly, the guard portion 30 provided on the lower surface 15S of the connecting frame 15 engages with the inner surface 24N. Furthermore, at the lower end portion and the upper end portion of the inner surface 24N of the first divided left frame 24, the guard portion is equal to the height of the guard portion 30 provided on the upper surface 11U of the lower frame 11 and the lower surface 15S of the connecting frame 15. 30 is not provided. Therefore, the upper and lower ends of the guard portion 30 provided on the inner surface 24N of the first divided left frame 24 are the upper surface of the guard portion 30 provided on the upper surface 11U and the guard provided on the lower surface 15S of the connecting frame 15. Engages with the lower surface of the portion 30. Thereby, the guard part 30 will be provided in the inner surface (namely, adhering surface) of the space 50 over the perimeter (refer FIG. 1).

  In addition, each frame of the filter frame 20 and the connection frame 15 in the present embodiment are each bent, for example, by bending each end portion of one metal plate, and joining the guard portion 30 by welding or the like. Further, unnecessary portions are formed by cutting away.

  FIG. 9 is a side view of an air filter according to the second embodiment of the present invention. 10 and 11 are cross-sectional views of the first and second divided left side frames, respectively. FIG. 12 is a cross-sectional view of the connection frame. In the second embodiment, the same members as those in the first embodiment are denoted by the same reference numerals.

  In the first embodiment, the first and second divided left side frames 24 and 25 and the first and second divided right side frames 26 and 27 are provided with bent portions at the upper end portion and the lower end portion, respectively. However, in the present embodiment, the bent portion is not provided. Hereinafter, the configuration of the air filter 10 in the second embodiment will be described focusing on the differences from the first embodiment.

  In the second embodiment, on the outer surface 24G of the first divided left frame 24, two first screw receivers (lower screw receivers) extending in the vertical direction H from the upper end to the lower end of the first divided left frame 24. ) 60 is provided, and a first groove 61 for screwing the screw from the upper end to the lower end is provided in the first screw receiver 60. The two first screw receivers 60 are provided symmetrically with respect to the center plane C of the filter frame 20 in the thickness direction D.

  Similarly, on the outer surface 25G of the second divided left frame 25, two second screw receivers (upper screw receivers) 62 extending in the vertical direction H from the upper end to the lower end of the second divided left frame 25 are provided. In the second screw receiver 62, a second groove 63 for screwing the screw from the upper end to the lower end is provided. The two second screw receivers 62 are provided symmetrically with respect to the center plane C.

  The two second screw receivers 62 are provided in positions different from the two first screw receivers 60 in the thickness direction D. Specifically, the two second screw receivers 62 are provided so as to sandwich the two first screw receivers 60 in the thickness direction D. Further, as shown in FIGS. 10 and 11, the outer surfaces 24G and 25G of the first and second divided left side frames 24 and 25 are arranged at both ends in the thickness direction D from the outermost edge portions 24E and 25E to the outside of the filter. Bending portions 24P and 25P that are bent toward the upper side in FIGS. 10 and 11 are provided. Further, also on the inner surfaces 24N and 25N of the first and second divided left side frames 24 and 25, at both ends in the thickness direction D, from the outermost edge portions 24E and 25E to the inner side of the filter (lower in FIGS. 10 and 11). The guard part 30 which bends to the side) is provided.

  The bent portions 24P and 25P extend from the upper end to the lower end of the first and second divided left side frames 24 and 25, respectively. The guard portions 30 of the first and second divided left side frames 24 and 25 extend from the upper end to the lower end, and the first and second divided left side frames 24 and 25 have a first implementation at the upper and lower end portions. Not cut out like the form. However, as will be described later, the left and right end portions of the lower frame 11, the upper frame 12, and the connecting frame 15 are notched, so that, as in the first embodiment, the inner surface of the space 50 (see FIG. 1). In other words, the guard portion 30 is provided over the entire circumference of the (fixed surface). Since the first and second divided right frames 26 and 27 have the same configuration as the first and second divided left frames 24 and 25, respectively, the description thereof is omitted.

  Also in the lower frame 11, the lower surface 11 </ b> S is provided with two third screw receivers 64 extending in the left-right direction X from the left end to the right end of the lower frame 11, and the third screw receiver 64 has a left end to a right end. A third groove 65 for screwing the screw is provided.

  The third screw receiver 64 is provided at the same position as the second screw receiver 62 in the thickness direction D, and the shape thereof is also the same. That is, the third screw receiver 64 is different from the first screw receiver 60 in the position in the thickness direction D. Further, at both end portions in the thickness direction D, a bent portion 11P having the same cross-sectional shape as the second divided left frame 25 and a guard portion 30 are provided.

  That is, the lower frame 11 has the same cross-sectional shape as the second divided left frame 25 and the second divided right frame 27. Further, the upper and lower ends of the second divided left frame 25 and the second divided right frame 27 are not provided with the bent portions 25E and 25F for inserting screws as in the first embodiment. Therefore, the lower frame 11, the second divided left frame 25, and the second divided right frame 27 can be molded by extrusion molding using the same mold. In addition, when forming each frame by extrusion molding, it is preferable that the filter frame 20 and the connection frame 15 are formed with aluminum and resin.

  Also in the upper frame 12, two fourth screw receivers 66 extending in the left-right direction X from the left end to the right end of the upper frame 12 are provided on the upper surface 12 </ b> U, and the left end from the left end to the right end is provided in the fourth screw receiver 66. A fourth groove 67 for screwing the screw is provided.

  Here, the fourth screw receiver 66 is provided in the same position as the first screw receiver 60 in the thickness direction D, and the shape thereof is also the same. That is, the fourth screw receiver 66 is different from the second screw receiver 62 in the position in the thickness direction D. Further, at both end portions in the thickness direction D, a bent portion 12P having the same cross-sectional shape as the first divided left frame 24 and a guard portion 30 are provided. That is, the upper frame 12 has the same cross-sectional shape as the first divided left frame 24 and the first divided right frame 26. Therefore, similarly to the lower frame 11, the upper frame 12, the first divided left frame 24, and the first divided right frame 26 can be molded by extrusion using the same mold.

  The connecting frame 15 is provided with guard portions 30 that bend upward and downward from the outermost edge portions 15E at both ends in the thickness direction of the upper surface 15U and the lower surface 15S. In addition, although the guard part 30 of the connection frame 15 is extended in the left-right direction respectively along the both ends of the thickness direction D, the left-right end part is notched.

  Two through holes (not shown) penetrate in the vertical direction H in the left end portion and the right end portion of the lower frame 11 respectively. On the upper surface 11U of the left end portion of the lower frame 11, the first divided left frame so that the first groove 61 of the first divided left frame 24 coincides with a through hole (not shown) of the lower frame 11. 24 is placed. The screw 39 passes through the through hole and is screwed into the first groove 61, whereby the first divided left frame 24 is fixed to the upper surface 11 U of the left end portion of the lower frame 11. Similarly, the first divided right frame 26 (see FIG. 1) is also fixed to the upper surface 11U at the right end of the lower frame 11.

  A connecting frame 15 that spans the upper ends of the first divided left side frame 24 and the first divided right side frame 26 is disposed. Here, four through holes (not shown) pass through the left end portion of the connecting frame 15 in the vertical direction H. Among the through holes, two through holes provided on the inner side are made to coincide with the two first grooves 61 of the first divided left side frame 24, and the screw 35A is inserted through the through hole and the first groove. Thus, the upper end portion of the first divided left side frame 24 and the left end portion of the connecting frame 15 are fixed. Similarly, the right end portion of the connecting frame 15 and the first divided right frame 26 (see FIG. 1) are fixed.

  A second divided left side frame 25 is further placed on the upper surface 15U of the left end portion of the connection frame 15, and at this time, the outer two of the through holes (not shown) provided in the left end portion of the connection frame 15 are placed. The through hole is matched with the second groove 63 of the second divided left side frame 25. The screw 35B is inserted through the through hole from the lower surface 15S side and screwed into the second groove 63, whereby the lower end portion of the second divided left frame 25 and the left end portion of the connecting frame 15 are fixed. Similarly, the lower end portion of the second divided right frame 27 and the right end portion of the connection frame 15 are fixed.

  Two through holes (not shown) are provided in the left end portion and the right end portion of the upper frame 12 respectively. The left end portion and the right end portion of the upper frame 12 are fixed to the upper end portions of the second divided left frame 25 and the second divided right frame 27 with screws 37. The first and second grooves 61 and 63 are not threaded in advance, but since the screws 35A, 35B, 37, and 39 are tapping screws, each groove is threaded when these screws are screwed together. The In the present embodiment, screws are not screwed into the third and fourth grooves 65 and 67.

  As described above, in the second embodiment, the filter frame 20 can be formed by extrusion molding using two molds by not providing the bent portions at the upper and lower end portions of each divided side frame. The filter frame 20 can be easily manufactured.

  13 and 14 are views for explaining a filter frame according to the third embodiment of the present invention. The third embodiment is different from the second embodiment only in the position in the thickness direction D where the screw receiver is provided. In the third embodiment, the same members as those in the second embodiment are denoted by the same reference numerals. Hereinafter, a difference between the third embodiment and the second embodiment will be described.

  In the second embodiment, the first and second divided left side frames 24 and 25 are provided with two first and second screw receivers 60 and 62, respectively, and two first screw receivers 60 ( Alternatively, the second screw receiver 62) is provided symmetrically with respect to the center plane C. In the present embodiment, the first screw receiver 60 is positioned with respect to the center plane C in the first divided left frame 24. Two are provided asymmetrically. Similarly, in the second divided left side frame 25, two second screw receivers 62 are provided asymmetrically with respect to the center plane C. Accordingly, in the present embodiment, in the thickness direction D, the first screw receiver 62 is provided. 60 is provided alternately with the second screw receiver 62.

  The first and second divided left side frames 24 and 25 have the same cross-sectional shape, and the second divided left side frame 25 has a shape in which the first divided left side frame 24 is rotated by 180 ° around the connecting frame 15. Presents. Of course, the same applies to the first and second divided right frames 26 and 27. The lower frame 11 has the same cross-sectional shape as the first divided left frame 24 (and the first divided right frame 26), and the third screw receiver 64 has a thickness direction D with respect to the first screw receiver 60. Are attached to the first divided left frame 24 (and the first divided right frame 26) so as to be reversed with respect to the center plane C. Similarly, the upper frame 12 has the same cross-sectional shape as the second divided left frame 25 (and the second divided right frame 27), and the fourth screw receiver 66 is thicker than the second screw receiver 62. It is attached to the second divided left frame 25 (and the second divided right frame 27) so as to be reversed with respect to the center plane C so that the positions in the direction D are different. That is, in this embodiment, all the frames of the filter frame (the lower frame 11, the upper frame 12, the left frame 13, and the right frame 14 (see FIG. 1)) have the same cross-sectional shape and the same mold. Can be manufactured by extrusion molding. Thereby, in this embodiment, the filter frame 20 can be manufactured still more easily.

  In the first to third embodiments, the side frames 13 and 14 are vertically divided into two and only one connection frame 15 is provided. It is divided and two or more connecting frames 15 may be provided. In this case, the air filter 10 can be further enlarged. In the second and third embodiments, the screw receiver is provided with a groove for screwing the screw, but may be a through hole.

It is a front view of the air filter concerning a 1st embodiment. It is a side view of the air filter concerning a 1st embodiment. It is a bottom view of the lower frame in a 1st embodiment. It is a side view of the 1st division | segmentation left side frame in 1st Embodiment. It is a cross-sectional view of the lower frame in the first embodiment. It is a top view of the connection frame in a 1st embodiment. It is a cross-sectional view of the connection frame in the first embodiment. It is a partial exploded perspective view of the filter frame in a 1st embodiment. It is a side view of the air filter which concerns on 2nd Embodiment. It is a cross-sectional view of the 1st division | segmentation left side frame which concerns on 2nd Embodiment. It is a cross-sectional view of the second divided left side frame according to the second embodiment. It is a cross-sectional view of the connection frame according to the second embodiment. It is a side view of the air filter which concerns on 3rd Embodiment. It is a cross-sectional view of the side frame according to the third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air filter 11 Lower frame 12 Upper frame 13 Left side frame 14 Right side frame 15 Connection frame 17 Filter medium 20 Filter frame 24 1st division | segmentation left side frame (lower division | segmentation side frame)
25 Second division left frame (upper division side frame)
26 First division right frame (lower division side frame)
27 Second division right frame (upper division side frame)
30 Guard portion 50, 51 Space 11B, 12B, 24B, 25B First bent portion 11C, 12C, 24C, 25C Second bent portion 24E, 25E Third bent portion 24F, 25F Fourth bent portion

Claims (10)

A filter frame formed by upper and lower frames extending in parallel to each other, and both side frames comprising a plurality of divided side frames divided in a vertical direction by straight lines parallel to the upper and lower frames;
A connecting frame that is passed between the both side frames and is sandwiched between the divided side frames in each side frame, and held by the side frames;
An air filter comprising: a filter medium disposed in each space partitioned by the filter frame and the connection frame, and fixed to the filter frame and the connection frame.   A bent portion that bends 90 ° toward the outside of the filter frame is provided at an end portion in the vertical direction of the divided side frame that holds the connecting frame, and the connecting frame is held by the bent portion. The air filter according to claim 1, wherein the air filter is held by the side frames.   The air filter according to claim 1, wherein the connection frame is fastened to the side frames by a fastening member. The plurality of divided side frames include first and second divided side frames that are adjacent to each other in the vertical direction,
Each of the first and second divided side frames is provided with a lower screw receiver and an upper screw receiver extending in the vertical direction, and screws for fixing the connection frame to the divided side frames are screwed together. ,
The air filter according to claim 3, wherein the lower screw receiver and the upper screw receiver have different positions in the thickness direction of the filter.   The air filter according to claim 4, wherein the first and second divided side frames have different cross-sectional shapes. In each of the first and second divided side frames, a plurality of the lower screw receivers and upper screw receivers are provided asymmetrically in the thickness direction with respect to the center position in the thickness direction of the filter,
The first and second divided side frames have the same cross-sectional shape, and the first divided side frame is rotated by 180 ° around the connecting frame with respect to the second divided side frame. The air filter according to claim 4, wherein the air filter is disposed. The plurality of divided side frames include a lower divided side frame fixed to the lower frame and an upper divided side frame fixed to the upper frame,
The lower and upper divided side frames are respectively provided with first and second screw receivers extending in the vertical direction to which screws for fixing the lower frame and the upper frame are screwed.
The lower frame and the upper frame are respectively provided with third and fourth screw supports extending in the extending direction of the lower frame and the upper frame,
The first and third screw receivers have different positions in the thickness direction of the filter,
The air filter according to any one of claims 1 to 3, wherein the second and fourth screw receivers also have different positions in the thickness direction of the filter. The lower divided side frame and the lower frame are different from each other in cross-sectional shape, so that the first and third screw receivers have different positions in the thickness direction of the filter,
The upper side divided side frame and the upper frame are different in cross-sectional shape from each other, so that the positions of the second and fourth screw receivers in the thickness direction of the filter are different. Air filter. In each of the lower divided side frame, the upper divided side frame, the lower frame, and the upper frame, the first to fourth screw supports are asymmetric in the thickness direction with respect to the center position in the thickness direction of the filter. There are several,
The lower frame has the same cross-sectional shape as the lower divided side frame, and the third screw receiver is different from the first screw receiver in the thickness direction. Inverted with respect to the center position in the thickness direction and attached to the lower divided side frame
The upper frame has the same cross-sectional shape as the upper divided side frame, and the thickness of the fourth screw receiver is different from that of the second screw receiver in the thickness direction. The air filter according to claim 7, wherein the air filter is attached to the upper divided side frame by being inverted with respect to a center position in the vertical direction. In the filter frame formed by the upper frame, the lower frame, and both side frames each composed of at least first and second divided side frames divided in the vertical direction, a connecting frame passed between the both side frames is provided, A method of manufacturing an air filter in which a filter medium is disposed in each space partitioned by the filter frame and the connection frame,
Fixing the first divided side frame to each of the upper surfaces of the left and right ends of the lower frame, and disposing the filter medium in a space defined by the lower frame and the first divided side frame;
The connection frame is stretched over the upper ends of the two first division side frames fixed to the lower frame, and the second division side frame is further arranged on the upper surfaces of the left and right ends of the connection frame. And fixing the connecting frame and the first and second divided side frames;
Arranging the filter medium in a space defined by the connection frame and the second divided side frame, and spanning the connection frame or the upper frame over the upper ends of the two second divided side frames; An air filter manufacturing method comprising:

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