JP2011005366A - Air filter, and method of producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a filter medium easily insertible into a filter frame, and to prevent damage of a filter medium from occurring upon its insertion thereinto.SOLUTION: The filter frame 11 is a rectangular frame that opens at the front and back ends thereof and includes a bottom plate 12 and a top plate 13. A filter medium unit 40 is disposed inside the filter frame 11 in a form of a "zigzag". A front crosspiece 31 and a back crosspiece 32 are each disposed in the openings 39F, 39B of the filter frame 11 respectively, to bridge the top plate 13 and the bottom plate 12. The crosspieces 31, 32 each include a groove into which the top parts 41F, 41B of the filter medium unit 40 are inserted respectively. Weirs 25, 27 are each disposed on either end part in the longitudinal direction of the bottom plate 12 and the top plate 13. The bottom plate 12 and the top plate 13 are each bisected into a front plate and a back plate.

Description

  The present invention relates to an air filter used for collecting particulates in the air, and more particularly to an air filter in which a filter medium is arranged in a V shape inside a filter frame.

  A so-called cell type air filter is known as an example of a high performance filter such as a medium performance filter, a HEPA filter, or a ULPA filter. The cell type air filter is composed of a square frame-shaped filter frame opened in the front and rear and a filter medium unit disposed therein, and the filter medium unit is formed by connecting a plurality of V shapes formed by two filter mediums. Is done. Each V-shaped top of the filter medium unit is normally arranged alternately in one opening and the other opening of the filter frame, and when viewed from above, the filter medium unit is arranged in a zigzag (see, for example, Patent Document 1). ).

  Since each filter medium is generally configured by folding a filter paper in a pleat shape, a gap is generally generated between the two filter media in the V-shaped top. For this reason, both openings of the filter frame are provided with a U-shaped crossing spanned between the top and bottom plates of the filter frame, and the V-shaped top is disposed inside the U-shaped, The filter medium is sealed with an adhesive filled in the filter.

  As shown in FIG. 8, when assembling a cell-type air filter, a pair of filter media 91 and 91 held in a V shape with a jig or the like are bonded and fixed using a U-shaped crosspiece 93 on one opening side. In general, a plurality of those fixed to the V shape are inserted into the air filter frame 90. In such a case, in order to fix the V-shaped filter media 91, 91 at a predetermined position inside the filter frame 90, the filter frame 90 is assembled into a square frame shape in advance, and It is necessary to hang the crosspiece 94 between the main plate 95 and the top plate 96.

JP 2008-221059 A

  By the way, generally, in order to prevent the adhesive injected into the inner surfaces of the base plate 95 and the top plate 96 from flowing out of the filter frame 90 at both ends in the front-rear direction of the base plate 95 and the top plate 96. Dam portions 98A and 98B raised toward the top plate 96 or the base plate 95 are provided.

  However, when the filter medium 91 is inserted into the square frame filter frame 90, the weir portions 98A and 98B may interfere with the insertion and further damage the filter medium 91. Further, since the filter frame 90 of the cell-type filter is generally long in depth (that is, the length in the front-rear direction), each filter medium 91 is inserted into the U-shape or bonded inside the U-shaped crosspiece 94. Filling with the agent may be inhibited by the filter frame 90.

  Therefore, the present invention has been made in view of the above problems, and an air filter that can easily insert a filter medium or the like into the filter frame without being obstructed by the weir portion or the top plate of the top plate. The purpose is to provide.

  The air filter according to the present invention is a square frame that is open at the front and rear, and is arranged so as to exhibit a V shape when viewed from the top plate side, inside the filter frame having a top plate and a ground plate facing each other. In the filter medium unit, both ends in the top-and-bottom direction are bonded to the top plate and the base plate with an adhesive, and the opening on the rear side of the filter frame is passed between the top plate and the main plate and toward the front A rear beam having an opening groove and a weir raised from both end portions of the top plate and the main plate in the front-rear direction to the main plate or the top plate. The top plate and the main plate are divided into at least two parts in the front-rear direction. The top plate and the main plate are both arranged in the front-rear direction.

  It is preferable that the air filter according to the present invention further includes a front crosspiece formed with a groove that is passed between the top plate and the main plate and opened toward the rear in the opening on the front side of the filter frame. . In this case, the filter medium unit is disposed so as to have a zigzag shape when viewed from the top plate side, and the top portion thereof is inserted into the groove of the rear beam portion and the groove of the front beam portion. And each top part is adhere | attached on a front crosspiece part or a back crosspiece part with the adhesive agent with which the inside of the groove | channel was filled.

  The adhesive filled in the groove of the front crosspiece preferably has thixotropic properties. Moreover, the adhesive with which the initial viscosity in the temperature of 25 degreeC is 500-2500 mPa * s is used for the adhesive agent filled into the groove | channel of a back crosspiece part, for example. Moreover, it is preferable that the initial viscosity at the temperature of 25 degreeC is 500-2500 mPa * s as for the adhesive agent which adhere | attaches a filter medium unit to a top plate and a ground plate.

  An air filter manufacturing method according to the present invention is a method for manufacturing the air filter, wherein the top plate and the base plate are each divided into at least two in the front-rear direction, and the front top plate And a rear top plate, a front base plate, and a rear base plate. In this method, a rear top plate and a rear base plate are attached to both side plates arranged so as to face each other, and a rear beam portion is spanned between the rear top plate and the rear base plate, and then the V-shaped top is rearward The filter medium unit is arranged in a V shape between both side plates so as to be inserted into the groove of the crosspiece, and then the front top plate and the front base plate are attached to the both side plates.

  It is preferable that the air filter further includes a front crosspiece in which a groove that is passed between the top plate and the base plate and that opens toward the rear of the filter frame is formed in the opening portion on the front side of the filter frame. And after attaching a back top plate and a back ground plate to the both side plates arranged so as to face each other, and spanning the back beam portion between the rear top plate and the rear ground plate, the top portion is inside the groove of the rear beam portion. In addition, the filter medium unit is disposed between the both side plates in a zigzag shape when viewed from the top plate side so that the top portion is disposed in the front opening portion, and the top portion disposed in the front opening portion is a groove in the front beam portion. It is preferable that the front crosspiece is covered on the top so as to be inserted inside, and then the front top plate and the front base plate are attached to both side plates, and the front crosspiece is spanned between the top plate and the base plate.

  At this time, while the groove of the rear beam part with the V-shaped top part arranged inside is directed upward, the groove of the front beam part with the V-shaped top part arranged inside is directed downward. It is preferable to adhere the V-shaped top portion to the rear beam portion or the front beam portion by disposing an adhesive inside the grooves of the rear beam portion and the front beam portion and curing the adhesive. More preferably, the adhesive disposed in the groove of the front crosspiece has thixotropic properties.

  In the present invention, since the top and bottom plates of the filter frame are divided into the front and rear, insertion of the filter medium and the like into the filter frame and the like can be made difficult to be hindered by the top and bottom plates and the weir part.

It is a perspective view of the air filter of a 1st embodiment. It is a disassembled perspective view of the air filter of 1st Embodiment. It is a perspective view for showing a manufacturing process of an air filter. It is a perspective view for showing a manufacturing process of an air filter. It is a perspective view for showing a manufacturing process of an air filter. It is a perspective view for showing a manufacturing process of an air filter. It is a perspective view of the air filter of 2nd Embodiment. It is a perspective view for showing the manufacturing process of the conventional air filter.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of the air filter of the first embodiment, and FIG. 2 is an exploded perspective view of the air filter of the first embodiment. The air filter 10 includes a square frame filter frame 11, a filter medium unit 16 disposed in the filter frame 11, and a plurality of front beam portions 31 and rear beam portions 32. The filter frame 11 is opened in the front-rear direction, and air is allowed to pass from the front opening 39F toward the rear opening 39B. However, the filter frame 11 may allow air to pass from the rear opening 39B toward the front opening 39F.

  The filter frame 11 connects the base plate 12 and the top plate 13 that are arranged in parallel to face each other, the left side plate 14 that connects the left ends of the base plate 12 and the top plate 13, and the right end of the base plate 12 and the top plate 13. The left side plate 14 and the right side plate 15 are also arranged opposite to each other in parallel. In the following description, the direction in which the base plate 12 and the top plate 13 are opposed to each other will be described as the top-to-bottom direction, and the direction in which the side plates 14 and 15 are opposed to each other will be described as the left-right direction. The plates 12 to 15 have substantially the same length in the front-rear direction.

  Each of the side plates 14 and 15 is formed of a single plate having a substantially rectangular or rectangular shape. Further, at the rear end portion 14B of the left side plate 14, an L-shaped portion 14A having an L-shaped cross section is connected to the inner surface 14N of the left side plate 14, and a left rear groove 35 is formed by the L-shaped portion 14A and the inner surface 14N. The Similarly, at the rear end portion 15B of the right side plate 15, an L-shaped portion 15A having an L-shaped cross section is connected to the inner surface 15N of the right side plate 15, and the right rear groove 36 is formed by the L-shaped portion 15A and the inner surface 15N. Is done. The L-shaped portions 14A and 15A, that is, the grooves 35 and 36 are provided from one end to the other end of the side plates 14 and 15 in the vertical direction. Further, the rear end portions 14B and 15B and the front end portions 14F and 15F of the side plates 14 and 15, respectively, are rising plates raised from the outer surfaces 14M and 15M of the side plates 14 and 15 toward the outside of the filter frame 11. 37 is continuously provided.

  The main plate 12 is divided into two substantially equally before and after the filter frame 11, and includes a front main plate 21 and a rear main plate 22. The front ground plate 21 and the rear ground plate 22 have a rectangular shape with substantially the same shape that is long on the left and right, and are connected to form a single rectangular or square ground plate 12. At the front end portion 21F of the front base plate 21 and the rear end portion 22B of the rear base plate 22, weir portions 25 and 26 raised toward the top plate 13 are formed.

  The top plate 13 is divided into two substantially equally before and after the filter frame 11, and includes a front top plate 23 and a rear top plate 24. The front top plate 23 and the rear top plate 24 have a rectangular shape with substantially the same shape that is long on the left and right, and are connected to form one rectangular or square top plate 13. At the front end portion 23F of the front top plate 23 and the rear end portion 24B of the rear top plate 24, weir portions 27 and 28 raised toward the main plate 12 are formed. The dam portions 25 to 28 are plate-like members that are vertically connected to the respective plates 21 to 24, and the plates 21 to 24 may be bent and formed, or the plate-like members are formed on the plates 21 to 24. It may be attached and molded by welding or the like.

  The dam portions 25 and 26 are provided over the entire length excluding both end portions in the left-right direction in the front end portion 21F of the front base plate 21 and the rear end portion 22B of the rear base plate 22, respectively. On the other hand, each of the side plates 14 and 15 is in contact with the inner surface 12N of the left end portion 12L and the right end portion 12R of the base plate 12 where the dam portions 25 and 26 are not provided.

  Then, both ends of the dam portion 25 in the left-right direction are in contact with the inner surfaces 14N and 15N of the left side plate 14 and the right side plate 15, respectively. Further, both ends of the dam portion 26 in the left-right direction are in contact with the L-shaped portions 14 </ b> A and 15 </ b> A of the side plates 14 and 15. Thereby, since the inner surface 12N of the base plate 12 is surrounded by the dam portions 25 and 26 and the side plates 14 and 15, even if the adhesive is injected onto the inner surface 12N of the base plate 12, the adhesive is not exposed to the outside of the filter frame 11. Leakage is prevented.

  The weir portions 27 and 28 are provided over the entire length excluding the left end portion and the right end portion in the front end portion 23F of the front top plate 23 and the rear end portion 24B of the rear top plate 24, respectively. Each of the side plates 14 and 15 abuts the inner surface 13N of the left end portion 13L and the right end portion 13R of the top plate 13 where the dam portions 27 and 28 are not provided.

  The both end portions of the dam portion 27 in the left-right direction are in contact with the inner surfaces 14N, 15N of the both side plates, and the both end portions of the dam portion 28 in the left-right direction are the L-shaped portions 14A, 15B of the side plates 14, 15 respectively. Abut each. As a result, the inner surface 13N of the top plate 13 is surrounded by the dam portions 27 and 28 and the side plates 14 and 15, and when the adhesive is injected onto the inner surface 13N of the top plate 13, the adhesive is removed from the filter frame 11. Leakage to the outside is prevented.

  The front opening 39F is provided with a plurality of front bars 31 that extend long in the vertical direction. The front crosspieces 31 are arranged at equal intervals on the left and right in the front opening 39F. Each front crosspiece 31 is formed in a U-shaped cross section by a base plate 31A and rising plates 31B and 31B rising from both left and right ends of the base plate 31A, and a front groove 33 that opens toward the rear of the filter frame 11. Is formed. In the rear opening 39B, a plurality of rear bars 32 extending in the vertical direction are disposed. The rear crosspieces 32 are arranged at equal intervals on the left and right in the rear opening 39B. Each of the rear bars 32 is formed in a U-shaped cross section by the base plate 32A and the rising plates 32B and 32B in the same manner as the front bar 31, and a rear groove 34 that opens toward the front of the filter frame 11 is formed. Is done. The front groove 33 and the rear groove 34 are provided over the entire length of the crosspieces 31 and 32.

  The base plate 31A of each front crosspiece 31 is arranged so that both ends in the top and bottom direction are along the inner surfaces of the dams 25 and 27 and are fixed to the dams 25 and 27 with rivets or the like. The part 31 is spanned between the main plate 12 and the top plate 13. Similarly, both ends of each rear beam portion 32 are fixed to the weir portions 26 and 28 and are spanned between the main plate 12 and the top plate 13. Each member of the filter frame 11 and the crosspieces 31 and 32 are formed of a metal such as aluminum, a galvanized steel plate or a galvalume steel plate, a resin such as ABS, or a wood such as veneer plywood.

  The filter medium unit 16 includes a plurality of filter media 40. Each filter medium 40 is configured by folding filter paper or nonwoven fabric formed from glass fiber or synthetic fiber. Each filter medium 40 is folded into a pleat shape so that folds 40A in the same filter medium are substantially parallel to each other, and a large number of pleats are formed. Each filter medium 40 folded in this way has a plate-like rectangular parallelepiped shape.

  Each filter medium 40 is arranged inside the filter frame 11 so that the fold line 40 </ b> A is substantially parallel to the top plate 13 and the main plate 12. One end portion (rear end portion) 40B in the fold direction of each filter medium 40 is disposed in the rear opening 39B, and the other end portion (front end portion) 40F in the fold direction is disposed in the front opening 39F. .

  In the rear opening 39B, the one end portions 40B and 40B of the two filter media 40 and 40 adjacent to the left and right are alternately separated and connected from the left side plate 14 to the right side plate 15. Further, in the front opening 39F, the other end portions 40F, 40F of the two filter media 40, 40 adjacent to the left and right are alternately connected and separated from the left side plate 14 toward the right side plate 15. Thereby, when viewed from the top plate 13 side, the two filter media 40 and 40 adjacent to the left and right form a V shape, and the filter media unit 16 has a zigzag shape in which a plurality of V shapes are connected. The V-shaped top portions 41F and 41B are disposed in the front opening 39F and the rear opening 39B, respectively.

  Among the plurality of filter media 40, the rear end portions 40B and 40B of the filter media 40 and 40 arranged on the leftmost plate 14 side and the rightmost plate 15 side are not connected to other filter media 40, and the left rear groove 35. And inserted into the right rear groove 36. These rear end portions 40B and 40B are bonded and fixed to the side plates 14 and 15 with an adhesive filled in the left rear groove 35 and the right rear groove 36, and the space between the side plates 14 and 15 and the filter medium unit 16 is fixed. Sealed.

  A V-shaped top portion 41F formed by the front end portions 40F and 40F of the two adjacent filter media 40 and 40 is inserted into the front groove 33. The V-shaped top portion 41F is bonded and fixed to the front crosspiece 31 by an adhesive filled in the front groove 33. Similarly, a V-shaped top portion 41 </ b> B formed by the rear end portions 40 </ b> B and 40 </ b> B of two adjacent filter media 40 and 40 is also inserted into the rear groove 34. The V-shaped top portion 41 </ b> B is bonded and fixed to the rear crosspiece 32 by an adhesive filled in the rear groove 34. The gap between the end portions 40B and 40B (or 40F and 40F) of the filter medium 40 is sealed by the adhesive inside the grooves 33 and 34.

  Both end portions 40C and 40D in the top-to-bottom direction of each filter medium 40 are bonded and fixed to the base plate 12 and the top plate 13 by an adhesive injected onto the inner surface 12N of the base plate 12 and the inner surface 13N of the top plate 13, respectively. Thereby, the space between the main plate 12, the top plate 13, and the filter medium unit 40 is sealed. The adhesive injected onto the inner surfaces 12N and 13N also enters the gaps between the front base plate 21 and the rear base plate 22 and between the front top plate 23 and the rear top plate 24, and seals between these. Also have.

  In the present embodiment, an adhesive having thixotropy is used as the adhesive filled in the front groove 33. Thixotropy refers to the property of exhibiting high fluidity while force is applied and deformation continues, but does not flow unless a large force is applied in a stationary state. By using an adhesive having thixotropic properties, the adhesive inside the groove 33 may flow down even if the front groove 33 is directed vertically downward with the adhesive inside the front groove 33. Absent. Therefore, as described later, the front V-shaped top 41F and the rear V-shaped top 41B can be bonded to the front beam 31 and the rear beam 32 substantially simultaneously. As an adhesive having thixotropic properties, for example, a known thixotropic agent is added to the adhesive in order to develop thixotropic properties.

  Adhesive filled outside the front groove 33 (that is, adhesive filled in the rear groove 34, the left rear groove 35, and the right rear groove 36, and an adhesive injected onto the inner surfaces 12N and 13N of the top and bottom plates) As an adhesive, an adhesive that does not have thixotropy and flows with a small force even from a stationary state is used. As the adhesive having no thixotropic properties, for example, a urethane adhesive containing a polyol and a curing agent having an isocyanate group is used, and its initial viscosity is preferably 50 to 2500 mPa · s. When the initial viscosity is in such a range, the adhesive can be spread over the entire inner surfaces of the base plate 12 and the top plate 13 relatively easily, and between the base plate 12 and the top plate 13 and the filter medium unit 16. Sealability can be improved. However, as the adhesive filled in the rear groove 34, the left rear groove 35, and the right rear groove 36, an adhesive having thixotropic properties may be used. This is because the adhesive filling the grooves 34 to 36 does not require high fluidity. The initial viscosity is obtained by uniformly mixing a material whose temperature is adjusted to 25 ± 0.5 ° C., and then reading the viscosity after 3 minutes with a B-type viscometer (No. 4 rotor, 60 rpm). is there.

  3-6 is a figure which shows the manufacturing process of the air filter of this embodiment in order. Hereinafter, the manufacturing method of this embodiment will be described with reference to these drawings. In the present embodiment, first, as shown in FIG. 3, the side plates 14 and 15 are arranged so as to face each other. Next, the rear top plate 24 is hung on the rear side of the one end surfaces 14U, 15U in the top and bottom direction of the both side plates 14, 15 and fixed to the both side plates 14, 15 by screwing or the like. Similarly, the rear ground plate 22 is spanned and fixed to the rear side of the other end surfaces 14D and 15D of the both side plates 14 and 15. Thereafter, a plurality of rear crosspieces 32 are stretched between the weir portions 26 and 28 of the rear base plate 22 and the rear top plate 24 and fixed by rivets or the like.

  Next, as shown in FIGS. 4 and 5, a plurality of filter media 40 are inserted between the side plates 14 and 15 from the front opening 39 </ b> F side. At this time, both end portions 40B, 40F of each filter medium 40 are arranged in the rear groove 34, the left rear groove 35, the right rear groove 36, and the opening 39F on the front side, and a plurality of filter media 40 are connected to form a zigzag. In addition, the grooves 34 to 36 are filled with an adhesive. Further, each of the V-shaped top portions 41F formed by the two other end portions 40F and 40F covers the front crosspiece 31 and inserts the V-shaped top portion 41F into the front groove 33, and inside the front groove 33. Fill with adhesive with thixotropic properties. At this time, as shown in FIG. 5, the rear groove 34, the left rear groove 35, and the right rear groove 36 are arranged vertically upward, while the front groove 33 is arranged vertically downward. The adhesive filled inside does not sag because it has thixotropic properties.

  Next, as shown in FIG. 6, the front top plate 23 is stretched over the front side of the one end surface 14U, 15U in the top-bottom direction of the both side plates 14, 15 and fixed to the both side plates 14, 15 by screwing or the like. Similarly, the front base plate 21 is spanned and fixed to the front side of the other end surfaces 14D and 15D of the both side plates 14 and 15. Moreover, both ends in the top-and-bottom direction of each front beam portion 31 are fixed to the weir portions 25 and 27 by rivets or the like, and each front beam portion 31 is spanned between the front ground plate 21 and the front top plate 23.

  Next, after the adhesive filled in the grooves 33 to 36 is cured, as shown in FIG. 1, the orientation of the filter frame is changed so that the inner surface 12N of the base plate 12 faces vertically upward. Thereafter, an adhesive is injected onto the inner surface 12N of the base plate 12 to bond the end portions 40C of the filter media to the base plate 12.

  After the adhesive on the inner surface 12N is cured, the air filter is inverted and disposed so that the inner surface 13N of the top plate 13 faces vertically upward. Next, an adhesive is injected onto the inner surface 13 </ b> N of the top plate 13, and the end 40 </ b> D of each filter medium 40 is adhered to the top plate 13. Note that the adhesive injected onto the inner surfaces 12N and 13N is an adhesive having no thixotropy as described above. Further, the order of injecting the adhesive onto the base plate 12 and the top plate 13 may be reversed.

  As described above, in this embodiment, when the filter media 40 are inserted into the filter frame, the front plates 21 and 23 of the top and bottom plates 12 and 13 are not attached to the side plates 14 and 15. Therefore, each filter medium 40 can be inserted into the filter frame 11 without being obstructed by the dam portions 25 and 27 and the top and bottom plates. Also, when filling the grooves 34 to 36 with the adhesive, the plates 21 and 23 are not attached to the both side plates, so that the grooves 34 to 36 can be filled with the adhesive relatively smoothly. .

  Furthermore, in this embodiment, since the adhesive with thixotropy is used for the adhesive filled in the front groove 33, the adhesive before curing is simultaneously disposed in the front groove 33 and the grooves 34 to 36. Can do. Therefore, since the filter medium 40 can be adhered to the front crosspiece 31, the rear crosspiece 32, and the side plates 14 and 15 almost simultaneously, the manufacturing time can be shortened. Further, the filter medium 40 can be fixed to the filter frame in a zigzag shape without using a special jig.

Next, a second embodiment of the present invention will be described with reference to FIG.
In the first embodiment, the main plate 12 and the top plate 13 are equally divided into two in the front and rear directions, and the two divided plates are equal in length in the front and rear direction and exhibit a substantially identical rectangular shape. In the present embodiment, the main plate 12 and the top plate 13 are not divided equally. Specifically, as shown in FIG. 7, the lengths of the rear base plate 22 and the rear top plate 24 in the front-rear direction are relatively short, and the lengths of the front base plate 21 and the front base plate 23 in the front-rear direction are combined. Long. In the present embodiment, when the filter medium 40 is inserted between the side plates 14 and 15, the length of the ground plate and the top plate attached to the side plates 14 and 15 in the front-rear direction is shortened. Makes it easier to insert. However, as in the first embodiment, the plates 21 to 24 can be manufactured in a simplified process by making the plates 21 to 24 the same shape.

  In each of the above-described embodiments, the end portions 40F and 40F of the two filter media 40 and 40 constituting the V-shaped top portion 41F are inserted into one groove of the front beam portion 31. Two grooves may be formed, and one end portion 40F of the filter medium may be inserted into each groove. Moreover, each front crosspiece 31 may be configured by adhering separate crosspieces each having one groove. The same applies to the rear crosspiece 32.

DESCRIPTION OF SYMBOLS 10 Air filter 11 Filter frame 12 Ground plate 13 Top plate 14 Left side plate 15 Right side plate 16 Filter medium unit 21 Front ground plate 22 Back ground plate 23 Front top plate 24 Rear top plate 25-28 Weir part 31 Front beam part 32 Rear beam part 33 Front groove | channel 34 Rear groove 40 Filter medium 41B, 41F Top

Claims (8)

A square frame that is open at the front and back, and a filter frame that includes a top plate and a ground plate that face each other;
Inside the filter frame, a filter medium unit arranged so as to exhibit a V shape when viewed from the top plate side, and both end portions in the top and bottom direction are bonded to the top plate and the base plate by an adhesive,
In the opening part on the rear side of the filter frame, a rear beam part formed between the top plate and the main plate, and formed with a groove opening forward,
From both ends in the front-rear direction of the top plate and the base plate, and a weir portion raised toward the base plate or the top plate,
The top of the V shape is disposed inside the groove of the rear beam part, and is adhered to the rear beam part by an adhesive filled in the groove,
The air filter according to claim 1, wherein the top plate and the base plate are divided into at least two in the front-rear direction. In the opening portion on the front side of the filter frame, the front frame portion that is passed between the top plate and the main plate and has a groove that opens toward the rear is further provided.
The filter medium unit is arranged so as to exhibit a zigzag shape when viewed from the top plate side, and the top portion is inserted into the groove of the rear beam portion and the groove of the front beam portion,
2. The air filter according to claim 1, wherein each of the top portions is bonded to the front beam portion or the rear beam portion with an adhesive filled in the groove.   The air filter according to claim 2, wherein the adhesive filled in the groove of the front crosspiece has thixotropic properties.   4. The air filter according to claim 1, wherein the adhesive filled in the groove of the rear crosspiece has an initial viscosity at a temperature of 25 ° C. of 500 to 2500 mPa · s. .   The adhesive for adhering the filter medium unit to the top plate and the base plate has an initial viscosity at a temperature of 25 ° C of 500 to 2500 mPa · s, according to any one of claims 1 to 4. Air filter. A square frame opened in the front-rear direction, both side plates facing each other, a filter frame composed of a top plate and a ground plate facing each other,
Inside the filter frame, a filter medium unit arranged so as to exhibit a V shape when viewed from the top plate side, and both end portions in the top and bottom direction are bonded to the top plate and the base plate by an adhesive,
In the opening part on the rear side of the filter frame, a rear beam part formed between the top plate and the main plate, and formed with a groove opening forward,
From both ends in the front-rear direction of the top plate and the base plate, and a weir portion raised toward the base plate or the top plate,
The top of the V shape is disposed inside the groove of the rear beam part, and is adhered to the rear beam part by an adhesive filled in the groove,
Each of the top plate and the base plate is divided into at least two in the front-rear direction, and is a method of manufacturing an air filter including a front top plate and a rear top plate, a front base plate and a rear base plate,
Attaching the rear top plate and the rear base plate to the both side plates arranged so as to face each other, and spanning the rear beam portion between the rear top plate and the rear base plate,
Next, after the filter medium unit is arranged in a V shape between the side plates so that the V-shaped top portion is inserted into the groove of the rear crosspiece, the front top plate and the front base plate are attached to the both side plates. An air filter manufacturing method characterized by the above. The air filter further includes a front beam portion in which a groove that is passed between the top plate and the base plate and opens toward the rear of the filter frame is formed in the opening portion on the front side of the filter frame,
After attaching the rear top plate and the rear base plate to the both side plates arranged to face each other, and spanning the rear beam portion between the rear top plate and the rear base plate,
The filter medium unit is disposed between the both side plates in a zigzag shape when viewed from the top plate side so that the top portion is disposed in the groove in the rear beam portion and in the opening on the front side, and on the front side Covering the top bar to the top so that the top arranged in the opening is inserted into the groove of the front beam,
The method for producing an air filter according to claim 6, wherein the front top plate and the front base plate are attached to the both side plates, and the front crosspiece is spanned between the front top plate and the front base plate. . In the state where the groove of the rear beam portion in which the V-shaped top portion is disposed is directed upward and the groove of the front beam portion in which the V-shaped top portion is disposed is directed downward, By placing an adhesive inside the groove of the crosspiece and the front crosspiece, and curing the adhesive, the top of the V shape is bonded to the rear crosspiece or the front crosspiece,
The method for manufacturing an air filter according to claim 7, wherein the adhesive disposed inside the groove of the front crosspiece has thixotropic properties.

Images