JP2009240945A

JP2009240945A - Air filter

Info

Publication number: JP2009240945A
Application number: JP2008091308A
Authority: JP
Inventors: Nobuyuki Tono; 伸幸東野; Takashi Niki; 隆志仁木; Keizo Okui; 敬造奥井
Original assignee: Nitta Corp
Current assignee: Nitta Corp
Priority date: 2008-03-31
Filing date: 2008-03-31
Publication date: 2009-10-22
Anticipated expiration: 2028-03-31
Also published as: JP5044468B2

Abstract

PROBLEM TO BE SOLVED: To facilitate the replacement of a filter medium by making it easier to detach a top plate with a filter frame remaining attached to a casing. SOLUTION: The filter frame 12 includes the top plate 21, a base plate 22, and both side plates 23 and 24, and is formed into a square frame shape. A top outer frame part 31, a base outer frame part 32, and both side outer frame parts 33 and 34 of a casing 13 are respectively provided to the outer sides of the top plate 21, the base plate 22, and the both side plates 23 and 24. Projection parts 48 and 49 are projected toward an inner surface 31N of the top outer frame part 31 from a rear end part 21B of the top plate 21. Tip ends 48T and 49T of the projection parts 48 and 49 come into contact with the inner surface 31N. The top plate 21 is upward revolved using the contact parts of the tip ends 48T and 49T with the inner surface 31N as fulcrums so that a front end part 21F of the top plate 21 is separated from the both side plates 23 and 24, and also moved forward to be detached from the both side plates 23 and 24. COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明はビル空調、産業空調等で使用し、フィルタ枠の内部に配置された濾材を、フィルタ枠の天板を取り外して交換することが可能なエアフィルタに関する。 The present invention relates to an air filter that can be used in a building air conditioner, an industrial air conditioner, etc., and that can replace a filter medium disposed inside a filter frame by removing a top plate of the filter frame.

従来、空気中の塵埃や汚染物質が除去されるために、ガラス繊維から成る濾紙やポリエステル等の不織布である濾材がひだ状に折り畳まれて濾材パックが形成され、その濾材パックが四角枠形のフィルタ枠内部に配置されて構成されるエアフィルタが知られている。この種のフィルタとしては、環境保全の観点から、耐用年数が経過した使用済みの濾材パックだけを交換して、フィルタ枠を繰り返し使用する濾材交換型のものが近年多く用いられつつある。 Conventionally, in order to remove dust and pollutants in the air, filter media made of glass fiber or non-woven fabric such as polyester is folded into a pleated shape to form a filter media pack, and the filter media pack has a square frame shape. An air filter is known that is arranged inside a filter frame. As this type of filter, from the viewpoint of environmental conservation, a filter medium replacement type in which only a used filter medium pack whose service life has passed is replaced and the filter frame is repeatedly used has been frequently used in recent years.

上記エアフィルタにおける濾材交換は、例えば、フィルタ枠の天板が取り外され、その開口された天面から濾材パックが抜き出された後、新たな濾材パックが挿入されて行われることが知られている（例えば特許文献１参照）。しかし、エアフィルタは、通常、空調設備等に設けられたケーシング内に取り付けられて使用されている。そのため、上記構成では、天板を取り外し、又は天面から濾材パックの交換を行うときのスペース的な制約から、一旦エアフィルタ全体をケーシングから取り外した後、濾材パックの交換を行わなければならず交換作業が煩雑になる。 It is known that the filter medium exchange in the air filter is performed, for example, by removing the filter plate top plate, extracting the filter medium pack from the opened top surface, and inserting a new filter medium pack. (For example, refer to Patent Document 1). However, the air filter is usually used by being attached in a casing provided in an air conditioning facility or the like. Therefore, in the above configuration, due to space limitations when removing the top plate or replacing the filter medium pack from the top surface, the filter medium pack must be replaced after removing the entire air filter from the casing. Replacement work becomes complicated.

また、フィルタ枠のエア流入側の開口部から濾材パックを出し入れして、濾材交換が行われることも知られている。しかし、フィルタ枠の天地板と濾材パックとの間のシール性確保のために、濾材パックの天地面には、弾性マット等から形成されたシール材が装着されていると共に、濾材パックの高さは、枠内部の高さに対してやや大きく設定されている。したがって、開口部から濾材パックを出し入れして濾材交換を行う場合、相当な力で濾材パックを枠内部に押し込め、或いは引き出す必要がある。 It is also known that the filter medium is exchanged by inserting and removing the filter medium pack from the air inlet side opening of the filter frame. However, in order to ensure the sealing property between the top plate of the filter frame and the filter medium pack, the top surface of the filter medium pack is fitted with a seal material formed from an elastic mat or the like, and the height of the filter medium pack. Is set slightly larger than the height inside the frame. Therefore, when exchanging the filter medium by inserting / removing the filter medium pack through the opening, it is necessary to push the filter medium pack into the frame or draw it out with a considerable force.

一方、特許文献２には、側板上端のエア下流側の端部に、天板が揺動自在に取り付けられ、天板を上方に揺動させた後、フィルタ枠の前面から濾材パックを出し入れすることが可能な濾材交換型エアフィルタが開示されている。このエアフィルタでは、濾材パックをフィルタ枠内に出し入れする際、濾材パックを押し込め或いは引き出す力が小さくて良いので、濾材パックの交換を比較的容易に行うことができる。
特許第３４６００３２号公報特許第３２７３３３３号公報 On the other hand, in Patent Document 2, a top plate is swingably attached to an end of the upper side plate on the air downstream side, and after swinging the top plate upward, a filter medium pack is taken in and out from the front surface of the filter frame. A filter medium exchangeable air filter that can be used is disclosed. In this air filter, when the filter medium pack is put in and out of the filter frame, the force to push in or pull out the filter medium pack may be small, so that the filter medium pack can be replaced relatively easily.
Japanese Patent No. 3460032 Japanese Patent No. 3273333

しかし、特許文献２に記載されるフィルタ枠では、スペース的な制約からフィルタ枠とケーシングとの間の間隔は狭いため、エアフィルタ枠をケーシングに取り付けたままでは、エアフィルタ枠の天板を十分に上方に揺動させることができない。また上記フィルタ枠では、天板をフィルタ枠から取り外すこともできず、したがって、エアフィルタ枠をケーシングに取り付けたまま濾材交換を行うと、上方に揺動された天板が邪魔になり、濾材交換の作業が煩雑になるという問題がある。さらに、特許文献２のフィルタ枠の構成では天板が側板の上端に揺動自在に取り付けられているためその揺動構造も複雑である。 However, in the filter frame described in Patent Document 2, the space between the filter frame and the casing is narrow due to space limitations, so that the top plate of the air filter frame is sufficient with the air filter frame attached to the casing. Cannot be swung upward. In the above filter frame, the top plate cannot be removed from the filter frame. Therefore, if the filter medium is replaced while the air filter frame is attached to the casing, the top plate that is swung upward will become an obstacle, and the filter medium must be replaced. There is a problem that the work is complicated. Furthermore, in the configuration of the filter frame of Patent Document 2, the top plate is swingably attached to the upper end of the side plate, and the swing structure is also complicated.

そこで、本発明は以上の問題点に鑑みて成されたものであり、エアフィルタ枠をケーシングに取り付けたままでも、濾材パック交換を容易に行うことができるエアフィルタを提供することを目的とする。 Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an air filter that can easily perform filter medium pack replacement even with the air filter frame attached to the casing. .

本発明に係るエアフィルタは、互いに対向する両側板と、両側板の一端部を接続する地板と、地板に対向しかつ両側板の他端部を接続するように、これらに着脱自在に取り付けられる天板とによって構成され、前後に開口された四角枠形のエアフィルタ枠と、エアフィルタ枠の内部に配置される濾材パックと、天板の外側に天板から離間して配置される天外枠部と、天板の後端部近傍又は後端部から天外枠部に向って突出し、先端部が天外枠部の内面に当接する突起部とを備える。そして、上記天板は、突起部の先端部と天外枠部との当接部分を支点に、天板の前端部が両側板から離れるように回動させられ、かつ前方に移動させられて、両側板から取り外されることが可能である。 The air filter according to the present invention is detachably attached to both side plates facing each other, a ground plate connecting one end portions of both side plates, and facing the ground plate and connecting the other end portions of both side plates. A square frame-shaped air filter frame that is configured by a top plate and is open at the front and rear, a filter medium pack that is disposed inside the air filter frame, and an outer frame that is disposed outside the top plate and spaced from the top plate And a projecting portion that protrudes from the vicinity of the rear end portion of the top plate or from the rear end portion toward the outer frame portion, and the tip portion abuts against the inner surface of the outer frame portion. Then, the top plate is pivoted so that the front end of the top plate is separated from the both side plates, with the contact portion between the tip of the protrusion and the outer frame portion as a fulcrum, and moved forward, It can be removed from the side plates.

天板の両側板に接続される両側端部それぞれには、側板の外面に沿って、地板に向けて立ち上げられた立上片が設けられることが好ましい。立上片には、穴又は凸部が設けられると共に、各側板の他端部近傍には穴又は凸部に一致する位置に、嵌合凸部又は嵌合穴が設けられることが好ましい。天板が両側板に取り付けられるとき、穴又は凸部が嵌合凸部又は嵌合穴に嵌合する。この場合、天板は例えば、穴又は凸部の嵌合凸部又は嵌合穴との嵌合状態が外され、かつ天板の前端部が両側板から離れるように、当接部分を支点に回動させられる。また、凸部又は穴は、天板の前後方向における中心位置よりも前方側に設けられていたほうが良い。 It is preferable that each of the side end portions connected to the both side plates of the top plate is provided with a rising piece raised toward the ground plate along the outer surface of the side plate. It is preferable that the rising piece is provided with a hole or a convex portion, and a fitting convex portion or a fitting hole is provided near the other end of each side plate at a position corresponding to the hole or the convex portion. When the top plate is attached to both side plates, the hole or the convex portion is fitted into the fitting convex portion or the fitting hole. In this case, for example, the top plate is removed from the fitting state of the hole or convex portion with the fitting convex portion or the fitting hole, and the front end portion of the top plate is separated from the both side plates. It can be rotated. Moreover, the convex part or the hole should be provided in the front side rather than the center position in the front-back direction of the top plate.

突起部は、エアフィルタ枠の前後方向に対して垂直な平板状を呈していても良い。また、突起部は、母線がエアフィルタ枠の前後方向に直交し、かつ曲面が天外枠部に向けられた半円柱状を呈していても良い。 The protrusion may have a flat plate shape perpendicular to the front-rear direction of the air filter frame. Further, the protrusion may have a semi-cylindrical shape in which the bus line is orthogonal to the front-rear direction of the air filter frame and the curved surface is directed to the outer frame portion.

両側板それぞれの外側に配置される両側外枠部と、地板の外側に配置され、両側外枠部の一端部を接続する地外枠部と、両側外枠部の他端部を接続する上述した天外枠部とを有し四角枠形を呈し、エアフィルタ枠が内部に配置されて取り付けられるケーシングを備えることが好ましい。天板の前端部は、天外枠部の前端部より前方側に配置されることが好ましい。 Both side outer frame portions arranged on the outer sides of both side plates, the outer frame portion arranged on the outer side of the ground plate and connecting one end portions of both side outer frame portions, and the above-mentioned connecting the other end portions of both side outer frame portions. It is preferable to provide a casing that has a square frame shape and has an air filter frame disposed and attached inside. It is preferable that the front end portion of the top plate is disposed on the front side of the front end portion of the ceiling outer frame portion.

エアフィルタ枠の前方側の開口部において、両側板の前端部を連結するように、これらに着脱自在に取り付けられる補強部を備えていたほうが良い。補強部は例えば、両前方側枠部と、両前方側枠部の一端部を接続する前方天枠部と、両前方側枠部の他端部を接続する前方地枠部とから構成される四角枠形の枠部材である。この場合、前方地枠部がフィルタ枠の地板の上に載せられると共に、両前方側枠部それぞれにフィルタ枠の両側板の前端部それぞれが嵌合されることにより、枠部材が両側板の前端部を連結する。枠部材の内部には、プレフィルタ濾材が装着されることが好ましい。 It is preferable to provide a reinforcing portion that is detachably attached to the front end portions of both side plates at the opening portion on the front side of the air filter frame so as to connect the front end portions of both side plates. The reinforcing portion is composed of, for example, both front side frame portions, a front top frame portion that connects one end portions of both front side frame portions, and a front ground frame portion that connects the other end portions of both front side frame portions. This is a square frame-shaped frame member. In this case, the front ground frame portion is placed on the ground plate of the filter frame, and the front end portions of the both side plates of the filter frame are respectively fitted to the two front side frame portions, whereby the frame member is moved to the front end of the both side plates. Connect the parts. It is preferable that a pre-filter medium is attached inside the frame member.

また、前方両側枠部それぞれには、後方に向けて開口する溝が設けられ、両側板の前端部それぞれは、それら溝に嵌合することが好ましい。上記溝は例えば、前方両側枠部それぞれの外周面に設けられた断面Ｌ字部材によって形成される。 Moreover, it is preferable that each of the front both side frame portions is provided with a groove that opens rearward, and each of the front end portions of the both side plates is fitted into these grooves. The groove is formed by, for example, an L-shaped member provided on the outer peripheral surface of each of the front side frame portions.

天板の両側板に接続される両側端部それぞれに、側板の外周面に沿って、地板に向けて立ち上げられた立上片が設けられる場合、各立上片の前方には凹部が設けられ、その凹部それぞれに前方側枠部と前方天枠部の接続部分が嵌合することが好ましい。 When each of the side ends connected to the both side plates of the top plate is provided with a rising piece raised toward the ground plate along the outer peripheral surface of the side plate, a recess is provided in front of each rising piece. It is preferable that a connecting portion between the front side frame portion and the front top frame portion is fitted in each of the recesses.

天板の前端部には、地板に向けて立ち上げられた第１の前方立上片が設けられ、第１の前方立上片が凹部の一部を構成し、枠部材は両側板の前端部と第１の前方立上片に挟持されることが好ましい。地板の前端部には、天板に向けて立ち上げられた第２の前方立上片が設けられると共に、枠部材は、両側板の前端部と第２の前方立上片に挟持されていることが好ましい。 The front end of the top plate is provided with a first front rising piece raised toward the ground plate, the first front rising piece forms part of a recess, and the frame member is the front end of both side plates. It is preferable to be sandwiched between the portion and the first front rising piece. The front end portion of the main plate is provided with a second front rising piece raised toward the top plate, and the frame member is sandwiched between the front end portions of the both side plates and the second front rising piece. It is preferable.

本発明では、フィルタ枠をケーシングに取り付けたまま簡単な構成でフィルタ枠の天板のみを取り外すことができるので、濾材パックの交換を容易に行うことが可能になる。 In the present invention, since only the top plate of the filter frame can be removed with a simple configuration while the filter frame is attached to the casing, the filter pack can be easily replaced.

以下本発明について、図面を参照しつつ説明する。
図１は、本発明の一実施形態に係るエアフィルタの全体を示す分解斜視図である。なお、以下の説明では、水平方向における一方向を左右方向Ｌ、鉛直方向を上下方向Ｖ、上下方向Ｖ及び左右方向Ｌに直交する方向を前後方向Ｄとする。また、以下の説明では特に言及がない限り、フィルタ枠において天板が両側板に取り付けられると共に、濾材パック、プレフィルタがフィルタ枠に取り付けられたときの構成を説明する。 The present invention will be described below with reference to the drawings.
FIG. 1 is an exploded perspective view showing an entire air filter according to an embodiment of the present invention. In the following description, one direction in the horizontal direction is the left-right direction L, the vertical direction is the up-down direction V, and the direction perpendicular to the up-down direction V and the left-right direction L is the front-rear direction D. Further, in the following description, unless otherwise specified, a configuration when the top plate is attached to both side plates in the filter frame and the filter medium pack and the prefilter are attached to the filter frame will be described.

本実施形態に係るエアフィルタ１０は、濾材パック１１と、フィルタ枠１２と、ケーシング１３と、プレフィルタ１４とを備える。フィルタ枠１２は、天板２１、地板２２、左側板２３、及び右側板２４を備える。左側板２３及び右側板２４は、上下方向Ｖが長手方向となる略矩形の平板状を呈し、上下方向Ｖ及び前後方向Ｄに平行に、かつ互いに対向して配置される。 The air filter 10 according to the present embodiment includes a filter medium pack 11, a filter frame 12, a casing 13, and a prefilter 14. The filter frame 12 includes a top plate 21, a ground plate 22, a left side plate 23, and a right side plate 24. The left side plate 23 and the right side plate 24 have a substantially rectangular flat plate shape in which the vertical direction V is the longitudinal direction, and are arranged in parallel with the vertical direction V and the front-rear direction D and facing each other.

天板２１及び地板２２は、左右方向Ｌが長手方向となる略矩形の平板状を呈し、左右方向Ｌ及び前後方向Ｄに平行に配置される。地板２２は、両側板２３、２４の下端部を接続する。天板２１は、地板２２に対向しかつ両側板２３、２４の上端部を接続するように、両側板２３、２４の上に着脱自在に取り付けられる。フィルタ枠１２は、前後に開口された四角枠形を呈し、フィルタ枠１２の前方側の開口部５０Ｆから後方側の開口部５０Ｂに向けてエアが流入される。 The top plate 21 and the base plate 22 have a substantially rectangular flat plate shape in which the left-right direction L is the longitudinal direction, and are arranged in parallel to the left-right direction L and the front-rear direction D. The base plate 22 connects the lower ends of the side plates 23 and 24. The top plate 21 is detachably mounted on the side plates 23 and 24 so as to face the base plate 22 and connect the upper ends of the side plates 23 and 24. The filter frame 12 has a square frame shape opened in the front-rear direction, and air flows from the opening 50F on the front side of the filter frame 12 toward the opening 50B on the rear side.

ケーシング１３は、フィルタ枠１２を内部に収納するための外枠１７と、フィルタ枠１２が取り付けられるための取付枠１８とを備える。外枠１７は、略矩形の平板状の天外枠部３１、地外枠部３２、左外枠部３３、及び右外枠部３４を備える。天外枠部３１、地外枠部３２それぞれは、左右方向Ｌ及び前後方向Ｄに平行に配置され、フィルタ枠１２の天板２１、地板２２それぞれの外側に配置される。左外枠部３３、右外枠部３４それぞれは、上下方向Ｖ及び前後方向Ｄに平行に配置され、フィルタ枠１２の左側板２３、右側板２４それぞれの外側に配置される。 The casing 13 includes an outer frame 17 for housing the filter frame 12 therein, and an attachment frame 18 for mounting the filter frame 12. The outer frame 17 includes a substantially rectangular flat outer frame portion 31, an outer frame portion 32, a left outer frame portion 33, and a right outer frame portion 34. The outer frame portion 31 and the outer frame portion 32 are arranged in parallel in the left-right direction L and the front-rear direction D, respectively, and are arranged outside the top plate 21 and the ground plate 22 of the filter frame 12. Each of the left outer frame portion 33 and the right outer frame portion 34 is disposed in parallel with the vertical direction V and the front-rear direction D, and is disposed outside the left side plate 23 and the right side plate 24 of the filter frame 12.

外地枠部３２は、左右の外枠部３３、３４の下端部を接続すると共に、天外枠部３１は左右の外枠部３３、３４の上端部を接続し、取付枠１８は四角枠形を呈する。外枠１７は、左右方向Ｌ及び上下方向Ｖにおいてフィルタ枠１２よりも大きく、外枠部３１、３２、３３、３４の内面それぞれは、天板２１、地板２２、両側板２３、２４の外面それぞれから離間している。外枠部３１〜３４それぞれの前後方向Ｄの長さは、フィルタ枠の各板２１〜２４それぞれの前後方向Ｄの長さより短く、フィルタ枠１２の各板２１〜２４の前端部２１Ｆ〜２４Ｆそれぞれは、外枠部３１〜３４の前端部３１Ｆ〜３４Ｆそれぞれより前方に配置される。 The outer frame portion 32 connects the lower end portions of the left and right outer frame portions 33, 34, the ceiling outer frame portion 31 connects the upper end portions of the left and right outer frame portions 33, 34, and the mounting frame 18 has a rectangular frame shape. Present. The outer frame 17 is larger than the filter frame 12 in the left-right direction L and the up-down direction V, and the inner surfaces of the outer frame portions 31, 32, 33, 34 are the outer surfaces of the top plate 21, the base plate 22, and the side plates 23, 24, respectively. It is away from. The length of each of the outer frame portions 31 to 34 in the front-rear direction D is shorter than the length of each plate 21 to 24 of the filter frame in the front-rear direction D, and the front end portions 21F to 24F of the plates 21 to 24 of the filter frame 12 respectively. Are arranged in front of the front end portions 31F to 34F of the outer frame portions 31 to 34, respectively.

取付枠１８は、外枠１７の後方の開口部の一部を覆うように設けられている。取付枠１８は、板状のフラットな四角枠形に形成され、左右方向Ｌに延び、互いに平行に配置される略矩形の後方天板部１８Ａ及び後方地板部１８Ｂと、上下方向Ｈに延び互いに平行に配置される略矩形の後方左側板部１８Ｃ及び後方右側板部１８Ｄとによって構成される。後方板部１８Ａ〜１８Ｄそれぞれは、外枠部３１〜３４それぞれの後端部３１Ｂ〜３４Ｂに連設されており、取付枠１８は外枠１７と一体に形成される。 The attachment frame 18 is provided so as to cover a part of the opening behind the outer frame 17. The mounting frame 18 is formed in a plate-like flat square frame shape, extends in the left-right direction L, and extends substantially in the vertical direction H to the substantially rectangular rear top plate portion 18A and rear base plate portion 18B arranged in parallel to each other. It is comprised by the substantially rectangular back left board part 18C and back right board part 18D which are arrange | positioned in parallel. Each of the rear plate portions 18 A to 18 D is connected to the rear end portions 31 B to 34 B of each of the outer frame portions 31 to 34, and the mounting frame 18 is formed integrally with the outer frame 17.

濾材パック１１は、ガラス繊維、合成繊維、不織布等から成るシート状濾材が、折り目に沿ってジグザグにひだ折りされて構成され、略直方体形に形成される。濾材パック１１は、その折り目が上下方向Ｖに平行に配置され、かつ濾材パック１１の背面１１Ｂが取付枠１８の前面１８Ｆに当接するように、フィルタ枠１２の内部に配置される。 The filter medium pack 11 is formed by a sheet-like filter medium made of glass fiber, synthetic fiber, non-woven fabric, and the like folded in a zigzag manner along a fold, and is formed in a substantially rectangular parallelepiped shape. The filter media pack 11 is arranged inside the filter frame 12 so that the folds are arranged in parallel in the vertical direction V, and the back surface 11B of the filter media pack 11 is in contact with the front surface 18F of the mounting frame 18.

濾材パック１１の上下の端面１１Ｕ、１１Ｄそれぞれと天板２１及び地板２２の内面それぞれの間には、クッション性を有するシート性の第１のシール材１５が設けられ、これらの間は第１のシール材１５によってシールされる。また、各端面１１Ｕ、１１Ｄは、シール材１５を介して、天板２１及び地板２２の内面に押圧支持されている。濾材パック１１の端面１１Ｕ、１１Ｄは、多数のひだ山の端面によって形成されており、ひだ山とひだ山との間からのエア漏れをなくすために、第１のシール材１５は、端面１１Ｕ、１１Ｄの全面を覆うように設けられる。 Between each of the upper and lower end faces 11U, 11D of the filter media pack 11 and the inner surfaces of the top plate 21 and the base plate 22, a sheet-like first sealing material 15 having cushioning properties is provided, and between these, the first sealing material 15 is provided. Sealed by the sealing material 15. Further, the end surfaces 11U and 11D are pressed and supported by the inner surfaces of the top plate 21 and the base plate 22 through the sealing material 15. The end faces 11U and 11D of the filter medium pack 11 are formed by end faces of a large number of pleats. In order to eliminate air leakage between the pleats and the pleats, the first sealing material 15 includes end faces 11U and 11D. It is provided so as to cover the entire surface.

濾材パック１１の左右の端面１１Ｌ、１１Ｒそれぞれには、第２シール材１６が取り付けられる。両側板２３、２４の内周面と、左右の端面１１Ｌ、１１Ｒそれぞれの間は、第２シール材１６によってシールされると共に、左右の端面１１Ｌ、１１Ｒは、第２のシール材１６を介して両側板２３、２４に押圧支持される。但し、左右の端面１１Ｌ、１１Ｒは、１つのひだ山の１枚の折り壁で構成されるため、第２のシール材１６は、端面１１Ｌ、１１Ｒにおいて上端から下端まで延在するが、前後方向Ｄにおいては一部分に取り付けられる。第１及び第２のシール材１５，１６は、例えば繊維材料、発泡体、スポンジ等のシート状の弾性材料で構成される。なお、第２のシール材１６は省略されていても良い。 A second sealing material 16 is attached to each of the left and right end faces 11L, 11R of the filter media pack 11. The space between the inner peripheral surfaces of the side plates 23 and 24 and the left and right end surfaces 11L and 11R is sealed by the second sealing material 16, and the left and right end surfaces 11L and 11R are interposed via the second sealing material 16. The two side plates 23 and 24 are pressed and supported. However, since the left and right end surfaces 11L and 11R are configured by a single folded wall of one pleat mountain, the second sealing material 16 extends from the upper end to the lower end on the end surfaces 11L and 11R. In D, it is attached to a part. The first and second sealing materials 15 and 16 are made of a sheet-like elastic material such as a fiber material, a foam, or a sponge, for example. Note that the second sealing material 16 may be omitted.

プレフィルタ１４は、濾材パック１１の前方に設けられ、フィルタ枠１２の前方側の開口部５０Ｆを覆うように配置される。本実施形態におけるエアフィルタ１０は、濾材交換型のエアフィルタであって、天板２１及びプレフィルタ１４が取り外された後、濾材パック１１を前方から取り出し又は挿入することが可能なフィルタである。なお、フィルタ枠１２、ケーシング１３、及び後述するプレフィルタ枠３９は、例えば、アルミ、亜鉛鋼板等の金属から形成される。 The prefilter 14 is provided in front of the filter media pack 11 and is disposed so as to cover the opening 50 F on the front side of the filter frame 12. The air filter 10 in the present embodiment is a filter medium exchange type air filter, and is a filter capable of removing or inserting the filter medium pack 11 from the front after the top plate 21 and the pre-filter 14 are removed. In addition, the filter frame 12, the casing 13, and the pre-filter frame 39 which will be described later are made of metal such as aluminum or galvanized steel.

図２は、フィルタ枠及びケーシングの拡大斜視図である。図３は、フィルタ枠の正面図である。図４は天板の側面図である。以下、図２〜４を用いて本実施形態に係るフィルタ枠及びケーシングの構成をさらに詳細に説明する。 FIG. 2 is an enlarged perspective view of the filter frame and the casing. FIG. 3 is a front view of the filter frame. FIG. 4 is a side view of the top plate. Hereinafter, the configuration of the filter frame and the casing according to the present embodiment will be described in more detail with reference to FIGS.

図２、３に示すように、フィルタ枠１２の地板２２及び両側板２３、２４の後端部２２Ｂ〜２４Ｂには、これら板がフィルタ枠１２の外側に向かって垂直に折り曲げられて成形された、折り曲げ部２２Ｓ〜２４Ｓが設けられる。各折り曲げ部２２Ｓ〜２４Ｓそれぞれは、後方地板部１８Ｂ、及び左右の後方側板部１８Ｃ、１８Ｄそれぞれの前面１８Ｆに当接し、これらにボルト２７等によって固定されている。 As shown in FIGS. 2 and 3, the base plate 22 of the filter frame 12 and the rear end portions 22 B to 24 B of the side plates 23 and 24 are formed by bending these plates vertically toward the outside of the filter frame 12. The bent portions 22S to 24S are provided. Each of the bent portions 22S to 24S abuts on the rear base plate portion 18B and the front surfaces 18F of the left and right rear side plate portions 18C and 18D, and is fixed to these by bolts 27 or the like.

図２、４に示すように、天板２１の前端部２１Ｆには、天板２１が垂直に折り曲げられて成形され、下方（すなわち、地板２２）に向かって立ち上げられる板状の第１の前方立上片２８が設けられる。第１の前方立上片２８は、天板２１の左端部２１Ｌから右端部２１Ｒまで設けられる。両側板２３、２４に接続される、天板２１の左端部２１Ｌ及び右端部２１Ｒには、天板２１が垂直に折り曲げられて成形され、下方に向かって立ち上げられる板状の立上片３５Ｌ、３５Ｒが設けられる。立上片３５Ｌ、３５Ｒの前方は切り取られており、天板２１には、天板２１の内面（下面）２１Ｎと、第１の前方立上片２８の背面と、立上片３５Ｌ、３５Ｒの前端面によって凹部３８Ｌ、３８Ｒが形成される。 As shown in FIGS. 2 and 4, the top plate 21 is formed by bending the top plate 21 vertically at the front end portion 21 F of the top plate 21, and rising upward (that is, the ground plate 22). A front rising piece 28 is provided. The first front rising piece 28 is provided from the left end portion 21L to the right end portion 21R of the top plate 21. The top plate 21 is formed by bending the top plate 21 vertically at the left end 21L and the right end 21R of the top plate 21 connected to the side plates 23, 24, and rising upward. , 35R are provided. The front of the rising pieces 35L and 35R is cut off, and the top plate 21 includes an inner surface (lower surface) 21N of the top plate 21, a back surface of the first front rising piece 28, and the rising pieces 35L and 35R. Concave portions 38L and 38R are formed by the front end surface.

地板２２の前端部２２Ｆには、地板２２が垂直に折り曲げられ成形され、上方に向かって立ち上げられる板状の第２の前方立上片２９が設けられる。第２の前方立上片２９は、地板２２の左端部２２Ｌから右端部２２Ｒまで設けられる。両側板２３、２４の前端部２３Ｆ、２４Ｆは、天板２１、地板２２の前端部２１Ｆ、２２Ｆより後方側に配置され、前方立上片２８、２９と左右の側板２３、２４の前端部２３Ｆ、２４Ｆとの間には、隙間４７が形成される。そして、両側板２３、２４の前端部２３Ｆ、２４Ｆは、立上片３５Ｌ、３５Ｒの前端面より前方側に配置され、側方から見ると、前端部２３Ｆ、２４Ｆは凹部３８Ｌ、３８Ｒの内部に配置される。なお、隙間４７は、後述するプレフィルタ枠４７が、前方立上片２８、２９と前端部２３Ｆ、２４Ｆの間に配置されるためのスペースとなる。 The front end 22F of the main plate 22 is provided with a plate-shaped second front rising piece 29 that is formed by bending the main plate 22 vertically and rising upward. The second front rising piece 29 is provided from the left end 22L to the right end 22R of the main plate 22. The front end portions 23F, 24F of the side plates 23, 24 are arranged on the rear side from the front end portions 21F, 22F of the top plate 21 and the base plate 22, and the front rising portions 28, 29 and the front end portions 23F of the left and right side plates 23, 24 are provided. , 24F, a gap 47 is formed. The front end portions 23F, 24F of the side plates 23, 24 are arranged in front of the front end surfaces of the rising pieces 35L, 35R. When viewed from the side, the front end portions 23F, 24F are located inside the recesses 38L, 38R. Be placed. The gap 47 is a space for a pre-filter frame 47 described later to be disposed between the front rising pieces 28 and 29 and the front end portions 23F and 24F.

天板２１の第１の前方立上片２８の先端部は、図４に示すように、内側に垂直に折り曲げられた後、さらに上方に垂直に折り曲げられて二度折りされているが、もちろん二度折りされていなくても良い。また、地板２２の第２の前方立上片２９の先端部は、さらに内側に向けてムダ折りされて、そのムダ折りされた部分は、第２の前方立上片２９の背面に密着するように形成されるが、もちろんムダ折りされていなくても良い。 As shown in FIG. 4, the front end portion of the first front rising piece 28 of the top plate 21 is bent vertically inward and then further vertically upward and is folded twice. It does not have to be folded twice. Further, the tip of the second front rising piece 29 of the base plate 22 is further folded inward so that the portion that is folded is in close contact with the back surface of the second front rising piece 29. Of course, it does not have to be folded.

側板２３、２４の前端部２３Ｆ、２４Ｆは、外側に向けてムダ折りされており、そのムダ折りされた部分５１は、側板２３、２４の外面に密着するように形成されるが、もちろんこれらはムダ折りされていなくても良い。側板２３、２４は、内側に向って折り曲げられておらず、側板２３、２４の内面はフラットな平面に形成される。 The front end portions 23F, 24F of the side plates 23, 24 are folded toward the outside, and the folded portions 51 are formed so as to be in close contact with the outer surfaces of the side plates 23, 24. It doesn't have to be folded. The side plates 23 and 24 are not bent inward, and the inner surfaces of the side plates 23 and 24 are formed in a flat plane.

次に、天板２１が両側板２３、２４に取り付けられるための構造について、図２〜４を用いてさらに詳細に説明する。天板２１は、立上片３５Ｌ、３５Ｒそれぞれが左側板２３、右側板２４の外面に沿うようにして、左側板２３、右側板２４の上端部２３Ｕ、２４Ｕの上に載置され、これらに取り付けられる。 Next, the structure for attaching the top plate 21 to the side plates 23 and 24 will be described in more detail with reference to FIGS. The top plate 21 is placed on the upper end portions 23U and 24U of the left side plate 23 and the right side plate 24 so that the rising pieces 35L and 35R are along the outer surfaces of the left side plate 23 and the right side plate 24, respectively. It is attached.

立上片３５Ｌ、３５Ｒそれぞれには、穴３６Ｌ、３６Ｒが穿設される。穴３６Ｌ、３６Ｒは、天板２１（すなわち、フィルタ枠１２）の前後方向Ｄにおける中心位置Ｃ２よりも前方側であって、天板２１の前端部２１Ｆ近傍に配置される。一方、左側板２３、右側板２４それぞれの上端部２３Ｕ、２４Ｕ近傍の外面には、穴３６Ｌ、３６Ｒに一致する位置に嵌合凸部３７Ｌ、３７Ｒが設けられる。 Holes 36L and 36R are formed in the rising pieces 35L and 35R, respectively. The holes 36L and 36R are disposed in front of the center position C2 in the front-rear direction D of the top plate 21 (that is, the filter frame 12) and in the vicinity of the front end portion 21F of the top plate 21. On the other hand, fitting convex portions 37L and 37R are provided on the outer surfaces near the upper end portions 23U and 24U of the left side plate 23 and the right side plate 24 at positions corresponding to the holes 36L and 36R, respectively.

嵌合凸部３７Ｌ、３７Ｒは穴３６Ｌ、３６Ｒに嵌合させられている。天板２１は、この嵌合により、両側板２３、２４に対して相対的に移動することが規制されることとなる。なお、立上片３５Ｌ、３６Ｒは、両側板２３、２４を内側に向けて押圧するように配置されていることが好ましい。この場合、押圧に反発して両側板２３、２４が外側に向けて復元されるので、嵌合凸部３７Ｌ、３７Ｒの穴３６Ｌ、３６Ｒへの嵌合状態は安定する。 The fitting convex portions 37L and 37R are fitted in the holes 36L and 36R. The top plate 21 is restricted from moving relative to the side plates 23 and 24 by this fitting. The rising pieces 35L and 36R are preferably arranged so as to press the side plates 23 and 24 inward. In this case, both side plates 23 and 24 are restored to the outside by repelling the pressing, so that the fitting state of the fitting convex portions 37L and 37R into the holes 36L and 36R is stabilized.

天板２１の後端部２１Ｂには、天板２１の外面（上面）２１Ｇから上方に向けて突出する突起部４８、４９が設けられる。突起部４８、４９は、後端部２１Ｂにおいて、左右方向Ｈにおける中心位置Ｃ１を中心に対称に配置され、本実施形態では左右の端部に配置される。突起部４８、４９は、それぞれ後端部２１Ｂに連設された凸部が上方に折り曲げられて成形されており、前後方向Ｄに対して垂直な平板状を呈する。突起部４８、４９の背面と天板２１の後端部２１Ｂは、同一平面上に配置される。天板２１の後端部２１Ｂ及び突起部４８、４９の背面は後方天板部１８Ａの前面１８Ｆに当接している。 The rear end portion 21B of the top plate 21 is provided with projections 48 and 49 protruding upward from the outer surface (upper surface) 21G of the top plate 21. The protrusions 48 and 49 are arranged symmetrically around the center position C1 in the left-right direction H at the rear end 21B, and are arranged at the left and right ends in this embodiment. The projecting portions 48 and 49 are each formed by bending a convex portion connected to the rear end portion 21 B upward, and have a flat plate shape perpendicular to the front-rear direction D. The back surfaces of the protrusions 48 and 49 and the rear end portion 21B of the top plate 21 are arranged on the same plane. The rear end portion 21B of the top plate 21 and the rear surfaces of the projections 48 and 49 are in contact with the front surface 18F of the rear top plate portion 18A.

突起部４８、４９の高さは、天板２１の外面２１Ｇと天外枠部３１の内面３１Ｎとの離間距離に略等しく、突起部４８、４９の先端部４８Ｔ、４９Ｔは、天外枠部の内面３１Ｎに当接している。これにより、天板２１は、天外枠部３１と両側板２３、２４の上端部２３Ｕ、２４Ｕによって挟み込まれ、上下方向Ｖに移動することが規制される。なお、天板２１は好ましくは突起部４８、４９を介して天外枠部３１に押圧されている。以上のように、本実施形態では、天板２１は、立上片３５Ｒ、３５Ｌ及び天外枠部３１によってその移動が規制され、両側板２３、２４の上に取り付けられている。 The heights of the projections 48 and 49 are substantially equal to the separation distance between the outer surface 21G of the top plate 21 and the inner surface 31N of the ceiling outer frame portion 31, and the tips 48T and 49T of the projections 48 and 49 are the inner surfaces of the ceiling outer frame portion. It is in contact with 31N. Accordingly, the top plate 21 is sandwiched between the top frame portion 31 and the upper end portions 23U and 24U of the side plates 23 and 24, and is restricted from moving in the vertical direction V. The top plate 21 is preferably pressed against the top frame 31 via the projections 48 and 49. As described above, in the present embodiment, the movement of the top plate 21 is restricted by the rising pieces 35R and 35L and the top frame 31 and is mounted on the side plates 23 and 24.

次に図１、５を参照して本実施形態に係るプレフィルタの構成を説明する。プレフィルタ１４は、図１に示すように、プレフィルタ枠３９と、プレフィルタ濾材４０とを有する。プレフィルタ枠３９は、上下方向Ｖに延びて互いに平行に配置される左右の前方側枠部４３、４４、並びに左右方向Ｌに延びて互いに平行に配置される前方天枠部４１及び前方地枠部４２を備える。前方天枠部４１及び前方地枠部４２は、前方側枠部４３、４４の上下の端部それぞれを接続し、プレフィルタ枠３９は四角枠形に形成される。 Next, the configuration of the prefilter according to the present embodiment will be described with reference to FIGS. As shown in FIG. 1, the prefilter 14 includes a prefilter frame 39 and a prefilter medium 40. The pre-filter frame 39 includes left and right front side frame portions 43 and 44 that extend in the vertical direction V and are arranged in parallel with each other, and a front ceiling frame portion 41 and a front ground frame that extend in the left and right direction L and are arranged in parallel with each other. The unit 42 is provided. The front top frame portion 41 and the front ground frame portion 42 connect the upper and lower ends of the front side frame portions 43 and 44, respectively, and the prefilter frame 39 is formed in a square frame shape.

プレフィルタ濾材４０は、濾材パック１１よりメッシュが粗い濾材であって、空気中の粗い塵埃や汚染物質を除去し、これらが濾材パック１１に付着することを防止する。プレフィルタ濾材４０は、その左右上下の端面が、左右の前方側枠部４３、４４、前方天枠部４１、及び前方地枠部４２に接着又は固定され、プレフィルタ枠３９の内部に装着される。 The pre-filter medium 40 is a filter medium having a coarser mesh than the filter medium pack 11 and removes coarse dust and contaminants in the air and prevents them from adhering to the filter medium pack 11. The left and right and upper and lower end surfaces of the prefilter medium 40 are attached or fixed to the left and right front side frame portions 43 and 44, the front top frame portion 41, and the front ground frame portion 42, and are mounted inside the prefilter frame 39. The

プレフィルタ枠３９の前方側枠部４３、４４の外周面４３Ｓ、４４Ｓには、上下方向に延びる断面Ｌ字部材４５Ｌ、４５Ｒが連設されている。断面Ｌ字部材４５Ｌ、４５Ｒは、例えば、両側枠部４３、４４に一体に形成され、その上端から下端まで設けられている。断面Ｌ字部材４５Ｌ、４５Ｒそれぞれは、図５に示すように、外周面４３Ｓ、４４Ｓから外側に向かって突出する第１の突出部４５Ａと、第１の突出部４５Ａの先端部から後方に向かって突出する第２の突出部４５Ｂから成る。断面Ｌ字部材４５Ｌ、４５Ｒは、第１の突出部４５Ａを溝底面とすると共に、外周面４３Ｓ又は４４Ｓ及び第２の突出部４５Ｂを溝側壁とする溝４６Ｌ、４６Ｒを形成する。これら溝４６Ｌ、４６Ｒは、上下方向Ｖに延在し、かつ後方に向けて開口する。 Cross-section L-shaped members 45L and 45R extending in the vertical direction are connected to the outer peripheral surfaces 43S and 44S of the front side frame portions 43 and 44 of the pre-filter frame 39, respectively. The cross-section L-shaped members 45L and 45R are formed integrally with the side frame portions 43 and 44, for example, and are provided from the upper end to the lower end. As shown in FIG. 5, each of the L-shaped members 45L and 45R has a first protrusion 45A that protrudes outward from the outer peripheral surfaces 43S and 44S, and a rearward direction from the tip of the first protrusion 45A. And a second projecting portion 45B projecting. The cross-section L-shaped members 45L and 45R form grooves 46L and 46R having the first protrusion 45A as the groove bottom surface and the outer peripheral surface 43S or 44S and the second protrusion 45B as the groove side walls. These grooves 46L and 46R extend in the vertical direction V and open toward the rear.

溝４６Ｌ、４６Ｒの内部に、左側板２３、右側板２４の前端部２３Ｆ、２４Ｆが嵌合されると共に、前方地枠部４２がフィルタ枠１２の地板２２の上面に載せられて、プレフィルタ枠３９は濾材パック１１の前方に配置される。これにより、両側板２３、２４の前端部２３Ｆ、２４Ｆは、プレフィルタ枠３９によって連結される。そして、プレフィルタ枠３９の両前方側枠部４３、４４それぞれと前方天枠部４１との接続部分５３Ｌ、５３Ｒは、天板２１の凹部３８Ｌ、３８Ｒ（図３参照）に嵌合される。 The front end portions 23F, 24F of the left side plate 23 and the right side plate 24 are fitted inside the grooves 46L, 46R, and the front ground frame portion 42 is placed on the upper surface of the ground plate 22 of the filter frame 12, so that the pre-filter frame 39 is arranged in front of the filter pack 11. Accordingly, the front end portions 23F and 24F of the side plates 23 and 24 are connected by the pre-filter frame 39. And the connection parts 53L and 53R of both the front side frame parts 43 and 44 of the pre-filter frame 39 and the front top frame part 41 are fitted in the recessed parts 38L and 38R (refer FIG. 3) of the top plate 21, respectively.

プレフィルタ枠３９の前方地枠部４２の前面は、第２の前方立上片２９の背面に圧接されると共に、前方天枠部４１の前面は、第１の前方立上片２８の背面に圧接されている。したがって、プレフィルタ枠３９は、前方立上片２８、２９と両側板２３、２４の前端部２３Ｆ、２４Ｆとによって挟持され、フィルタ枠１２に固定されることとなる。このような状態では、フィルタ枠１２の両側板２３、２４の前方側が、プレフィルタ枠３９によって保持され、フィルタ枠１２の両側板２３、２４は、左右に撓みにくくなる。 The front surface of the front ground frame portion 42 of the pre-filter frame 39 is pressed against the back surface of the second front rising piece 29, and the front surface of the front top frame portion 41 is connected to the back surface of the first front rising piece 28. It is in pressure contact. Therefore, the pre-filter frame 39 is sandwiched between the front rising pieces 28 and 29 and the front end portions 23F and 24F of the side plates 23 and 24, and is fixed to the filter frame 12. In such a state, the front sides of the side plates 23 and 24 of the filter frame 12 are held by the pre-filter frame 39, and the side plates 23 and 24 of the filter frame 12 are less likely to bend to the left and right.

本実施形態では、天板２１は、フィルタ枠１２に取り付け、或いはフィルタ枠１２から取り外すことが可能である。天板２１が取り外されるときには、まず、天板２１の前端部２１Ｆ側が上方に強く引っ張られて凸部３７Ｌ、３７Ｒが嵌合穴３６Ｌ、３６Ｒから抜き取られる。このとき、天板２１は、突起部４８、４９の先端部４８Ｔ、４９Ｔと天外枠部の内面３１Ｎとの当接部分を支点に、天板２１の前端部２１Ｆが両側板２３、２４から離れるように上方に回動する。 In the present embodiment, the top plate 21 can be attached to or removed from the filter frame 12. When the top plate 21 is removed, first, the front end portion 21F side of the top plate 21 is strongly pulled upward, and the convex portions 37L and 37R are extracted from the fitting holes 36L and 36R. At this time, the top plate 21 has the front end portion 21F of the top plate 21 separated from the side plates 23 and 24 with the contact portion between the tip portions 48T and 49T of the projections 48 and 49 and the inner surface 31N of the top frame portion as a fulcrum. So as to rotate upward.

次いで、天板２１は、上記当接部分を支点に、天板２１の前端部２１Ｆが両側板２３、２４からさらに離れるように上方に回動させられると共に、前方に向けて引っ張られる。これにより、天板２１は、前端部２１Ｆ側が斜め上方を向くように傾けられた状態で、突起部４８、４９を天外枠部３１の内面３１Ｎに当接させつつ、前方に移動して両側板２３、２４から取り外される。 Next, the top plate 21 is rotated upward so that the front end portion 21F of the top plate 21 is further away from the both side plates 23 and 24 with the contact portion as a fulcrum, and is pulled forward. Accordingly, the top plate 21 is moved forward while the projections 48 and 49 are brought into contact with the inner surface 31N of the top frame 31 in a state where the front end portion 21F is inclined obliquely upward. 23, 24.

一方、天板２１が取り付けられるときには、まず取り外された天板２１が、前端部２１Ｆ側が斜め上方を向くように傾けられた状態で、両側板２３、２４の上端部２３Ｕ、２４Ｕと天外枠部３１の内面３１Ｎとの間に挿入される。そして、天板２１は、後方に押されることにより、突起部４８、４９を天外枠部３１の内面３１Ｎに当接させつつ、後方に移動する。これと共に、天板２１は、突起部４８、４９と天外枠部３１の内面３１Ｎとの当接部分を支点に、前端部２１Ｆが両側板２３、２４に近づくように下方に向けて回動させられ、嵌合凸部３７Ｌ、３７Ｒの上に立上片３５Ｌ、３５Ｒが載せられた状態となる。 On the other hand, when the top plate 21 is attached, first the removed top plate 21 is tilted so that the front end portion 21F side faces obliquely upward, and the upper end portions 23U, 24U of the side plates 23, 24 and the ceiling frame portion It is inserted between the inner surface 31N of 31. Then, the top plate 21 is moved rearward by being pushed rearward while bringing the projections 48 and 49 into contact with the inner surface 31N of the outer frame 31. At the same time, the top plate 21 is rotated downward so that the front end portion 21F approaches both side plates 23 and 24, with the contact portion between the projections 48 and 49 and the inner surface 31N of the outer frame portion 31 as a fulcrum. Thus, the rising pieces 35L and 35R are placed on the fitting convex portions 37L and 37R.

その後、天板２１は下方に押圧されて、天板２１の立上片３５Ｌ、３５Ｒが嵌合凸部３７Ｌ、３７Ｒによって僅かに外側に広げられつつ下方に移動させられる。なお、このときも、天板２１は上記当接部分を支点に下方に向けて回動することとなる。これにより、嵌合凸部３７Ｌ、３７Ｒは穴３６Ｌ、３６Ｒに嵌合させられると共に、凹部３８Ｌ、３８Ｒにプレフィルタ枠３９の接続部分５３Ｌ、５３Ｒが嵌め入れられ、天板２１が両側板２３、２４の上に取り付けられる。 Thereafter, the top plate 21 is pressed downward, and the rising pieces 35L, 35R of the top plate 21 are moved downward while being slightly spread outward by the fitting convex portions 37L, 37R. Also at this time, the top plate 21 rotates downward with the contact portion as a fulcrum. Thereby, the fitting convex portions 37L and 37R are fitted into the holes 36L and 36R, and the connection portions 53L and 53R of the prefilter frame 39 are fitted into the concave portions 38L and 38R, and the top plate 21 is attached to both side plates 23, 24 is mounted on.

なお、本実施形態では、天板２１の前端部２１Ｆが天外枠部３１の前端部３１Ｆより前方に配置されるので、両側板２３、２４と天外枠部３１との間に挿入された天板２１は、上方に回動しやすい。また、天板２１が両側板２３、２４と天外枠部３１との間で前後に移動するとき、天板２１と共に突起部４８、４９は傾けられており、突起部４８、４９の上下方向Ｖにおける長さが短くなっている。したがって、天板２１の前後の移動を突起部４８、４９が阻害することが防止される。 In the present embodiment, since the front end portion 21F of the top plate 21 is disposed in front of the front end portion 31F of the top outer frame portion 31, the top plate inserted between the side plates 23 and 24 and the top frame portion 31. 21 is easy to turn upward. Further, when the top plate 21 moves back and forth between the side plates 23 and 24 and the outer frame portion 31, the projections 48 and 49 are inclined together with the top plate 21, and the vertical direction V of the projections 48 and 49 is increased. The length at is shorter. Therefore, the protrusions 48 and 49 are prevented from obstructing the front and rear movement of the top plate 21.

次に、本実施形態において、濾材パック１１が交換されるときの態様を説明する。濾材パック１１が交換されるときには、まず、天板２１が上述したように両側板２３、２４から取り外される。天板２１が取り外されると、次にプレフィルタ１４がフィルタ枠１２から取り外される。具体的には、プレフィルタ１４が上方に持ち上げられると共に前方に引っ張られることにより、溝４６Ｌ、４６Ｒから前端部２３Ｆ、２４Ｆが抜き取られ、プレフィルタ１４がフィルタ枠１２から取り外される。 Next, in the present embodiment, a mode when the filter medium pack 11 is replaced will be described. When the filter medium pack 11 is replaced, first, the top plate 21 is removed from the side plates 23 and 24 as described above. When the top plate 21 is removed, the prefilter 14 is then removed from the filter frame 12. Specifically, when the prefilter 14 is lifted upward and pulled forward, the front end portions 23F and 24F are extracted from the grooves 46L and 46R, and the prefilter 14 is removed from the filter frame 12.

プレフィルタ１４がフィルタ枠１２から取り外されると、フィルタ枠１２は、その前面及び天面が開口されるので、それら開口された前面ないし天面からフィルタ枠１２の内部に濾材パック１１が出し入れされ、濾材パック１１が交換される。本実施形態では、天板２１及びプレフィルタ１４が取り外された両側板２３、２４は、天板２１及びプレフィルタ１４によって左右の変位が規制されず左右に撓みやすくなる。さらに、両側板２３、２４の内面はフラットな平面に形成されており、したがって、濾材パック１１の出し入れは容易になる。なお、第１及び第２のシール材１５、１６は濾材パック１１と共に交換されても良いし、交換されなくても良い。 When the pre-filter 14 is removed from the filter frame 12, the front and top surfaces of the filter frame 12 are opened, so that the filter media pack 11 is taken in and out of the filter frame 12 from the opened front surface or top surface. The filter pack 11 is replaced. In the present embodiment, the side plates 23 and 24 from which the top plate 21 and the pre-filter 14 are removed are not restricted from being displaced left and right by the top plate 21 and the pre-filter 14 and are easily bent to the left and right. Furthermore, the inner surfaces of the side plates 23 and 24 are formed in a flat plane, so that the filter medium pack 11 can be easily put in and out. In addition, the 1st and 2nd sealing materials 15 and 16 may be replaced | exchanged with the filter media pack 11, and do not need to be replaced | exchanged.

濾材パック１１が交換されると、次にプレフィルタ１４がフィルタ枠１２に取り付けられる。このとき、プレフィルタ枠３９の溝４６Ｌ、４６Ｒの内部に、左側板２３、右側板２４の前端部２３Ｆ、２４Ｆが嵌合されると共に、前方地枠部４２が地板２２の上面に置かれて、プレフィルタ１４がフィルタ枠１２に取り付けられる。プレフィルタ枠１４が取り付けられた後、上述したように両側板２３、２４に天板２１が取り付けられ、濾材パック１１の交換作業が終了する。 When the filter media pack 11 is replaced, the prefilter 14 is then attached to the filter frame 12. At this time, the front end portions 23F and 24F of the left side plate 23 and the right side plate 24 are fitted into the grooves 46L and 46R of the prefilter frame 39, and the front ground frame portion 42 is placed on the upper surface of the ground plate 22. The prefilter 14 is attached to the filter frame 12. After the prefilter frame 14 is attached, the top plate 21 is attached to the side plates 23 and 24 as described above, and the replacement work of the filter media pack 11 is completed.

以上のように、本実施形態においては、フィルタ枠１２をケーシング１３に取り付けたまま、簡単な構成で天板２１のみを取り外すことができるので、濾材パック１１の交換を容易に行うことが可能になる。 As described above, in the present embodiment, only the top plate 21 can be removed with a simple configuration while the filter frame 12 is attached to the casing 13, so that the filter pack 11 can be easily replaced. Become.

図６は、本発明の第２の実施形態に係る天板を示す斜視図である。第２の実施形態において、第１の実施形態と相違する点は、突起部の構成である。第１の実施形態では、突起部は、天板２１が折り曲げられて成形され、天板２１の後端部２１Ｂから上方に突出していたが、本実施形態における突起部は、天板とは別部材のＬ字部材６０によって構成されると共に、後端部２１Ｂより前方の位置である、後端部２１Ｂ近傍から突出している。 FIG. 6 is a perspective view showing a top plate according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in the configuration of the protrusions. In the first embodiment, the protrusion is formed by bending the top plate 21 and protrudes upward from the rear end portion 21B of the top plate 21, but the protrusion in the present embodiment is different from the top plate. It is comprised by the L-shaped member 60 of a member, and protrudes from the rear-end part 21B vicinity which is a position ahead of the rear-end part 21B.

本実施形態におけるＬ字部材６０は、天板２１の外面２１Ｇに当接されて固定される基底片６１と、基底片６１の後端部から基底部６１に対して垂直に立ち上げられた立上片６２とから成り、立上片６２が突起部となる。立上片６２は、第１の実施形態の突起部と同様に、前後方向に対して垂直な平板状を呈するが、後端部２１Ｂより前方に配置され、天板２１の後端部２１Ｂ近傍から上方に向けて突出することとなる。以上のように本実施形態では、天板２１の後端部２１Ｂに突起部が設けられないので、後端部２１Ｂにおける突起部を含めた天板２１の高さは低くなり、天板２１の後端部２１Ｂを天外枠部３１と両側板２３、２４（図２参照）の間に挿入しやすくなる。 The L-shaped member 60 in the present embodiment includes a base piece 61 that is fixed in contact with the outer surface 21G of the top plate 21 and a standup that is vertically raised from the rear end portion of the base piece 61 to the base portion 61. It consists of an upper piece 62, and the rising piece 62 becomes a protrusion. The rising piece 62 has a flat plate shape that is perpendicular to the front-rear direction, similar to the protruding portion of the first embodiment, but is disposed in front of the rear end portion 21B and in the vicinity of the rear end portion 21B of the top plate 21. It will protrude upwards from. As described above, in the present embodiment, no projection is provided on the rear end portion 21B of the top plate 21, so that the height of the top plate 21 including the projection portion at the rear end portion 21B is reduced. It becomes easy to insert the rear end portion 21B between the outer frame portion 31 and the side plates 23 and 24 (see FIG. 2).

図７は、本発明の第３の実施形態に係る天板を示す斜視図である。第３の実施形態において、第１及び第２の実施形態と相違する点は、突起部の構成である。本実施形態における突起部７１、７２は、円柱をその軸方向に２分割した半円柱状を呈し、分割平面７３が天板２１の外面２１Ｇに固定される。半円柱の突起部７１、７２は、その母線が前後方向Ｄに直交する左右方向Ｌに沿って延び、かつ曲面７４が天外枠部３１（図２参照）に向けられている。 FIG. 7 is a perspective view showing a top plate according to the third embodiment of the present invention. The third embodiment is different from the first and second embodiments in the configuration of the protrusions. The protrusions 71 and 72 in the present embodiment have a semi-cylindrical shape obtained by dividing the cylinder into two in the axial direction, and the division plane 73 is fixed to the outer surface 21 G of the top plate 21. The semi-cylindrical protrusions 71 and 72 have their generatrix extending along the left-right direction L perpendicular to the front-rear direction D, and the curved surface 74 is directed to the outer frame 31 (see FIG. 2).

本実施形態における突起部７１、７２は、第１の実施形態と同様に、天板２１の後端部２１Ｂに設けられ、突起部７１、７２の後端部の前後方向Ｄにおける位置は、天板２１の後端部２１Ｂに一致している。しかし、突起部７１、７２は半円柱状を成すため、後端部２１Ｂにおける突起部７１、７２を含めた天板２１の高さは低くなり、天板２１の後端部２１Ｂを天外枠部３１と両側板２３、２４の間に挿入しやすくなる。また、本実施形態では、突起部７１、７２の天外枠部３１との当接部分は曲面７４で形成される。したがって、突起部７１、７２を天側枠部３１の内面３１に当接させつつ、天板２１を前後に移動させても、突起部７１、７２によって内面３１Ｎが傷つけられることが防止される。 Similar to the first embodiment, the protrusions 71 and 72 in the present embodiment are provided on the rear end 21B of the top plate 21, and the positions of the rear ends of the protrusions 71 and 72 in the front-rear direction D are It corresponds to the rear end 21B of the plate 21. However, since the projections 71 and 72 have a semi-cylindrical shape, the height of the top plate 21 including the projections 71 and 72 in the rear end portion 21B is reduced, and the rear end portion 21B of the top plate 21 is made to be the outer frame portion. It becomes easy to insert between 31 and both side plates 23 and 24. In the present embodiment, the contact portions of the protrusions 71 and 72 with the outer frame portion 31 are formed by a curved surface 74. Therefore, even when the top plate 21 is moved back and forth while the protrusions 71 and 72 are in contact with the inner surface 31 of the top frame 31, the inner surface 31N is prevented from being damaged by the protrusions 71 and 72.

上記各実施形態においては、濾材パック１１の前方にプレフィルタ１４が設けられるが、プレフィルタ１４は設けられていなくても良い。但しこの場合も、両側板２３、２４の前端部２３Ｆ、２４Ｆを連結するように、これらに着脱自在に取り付けられ、両側板２３、２４の左右方向Ｌへの撓みを規制するための補強部が設けられることが好ましい。補強部としては、例えば、前端部２３Ｆ、２４Ｆを連結するように配置される柱状又は板状の部材であっても良いが、プレフィルタ枠３９と同様の構成を有する四角枠形の枠部材であっても良い。 In each of the above embodiments, the prefilter 14 is provided in front of the filter medium pack 11, but the prefilter 14 may not be provided. However, in this case as well, the front end portions 23F and 24F of the side plates 23 and 24 are detachably attached to the front end portions 23F and 24F, and a reinforcing portion for restricting the bending of the side plates 23 and 24 in the left-right direction L is provided. It is preferable to be provided. The reinforcing portion may be, for example, a columnar or plate-like member arranged so as to connect the front end portions 23F and 24F, but is a square frame-shaped frame member having the same configuration as the pre-filter frame 39. There may be.

また、上記各実施形態では、天板２１の立上片３５Ｌ、３５Ｒに穴が、両側板２３、２４に嵌合凸部が設けられたが、立上片３５Ｌ、３５Ｒそれぞれの内周面に凸部が、両側板２３、２４に各凸部が嵌合するための嵌合穴が穿設されていても良い。 Moreover, in each said embodiment, although the hole was provided in the standing pieces 35L and 35R of the top plate 21, and the fitting convex part was provided in the both-sides plates 23 and 24, it is in the inner peripheral surface of each standing piece 35L, 35R. The protrusions may be provided with fitting holes for fitting the protrusions to the side plates 23 and 24.

また、上記各実施形態では、天板２１の突起部は、天板２１が両側板２３、２４に取り付けられた状態において、天外枠部３１の内面３１Ｎに当接していたが、当接していなくても良く、天板２１が回動するときに当接していれば良い。さらに、天板２１は、両側板２３、２４から取り外されるとき、突起部を天外枠部３１の内面３１Ｎに当接させつつ前後に移動していたが、当接させないで前後に移動しても良い。 In each of the above embodiments, the projection of the top plate 21 is in contact with the inner surface 31N of the top frame 31 in a state where the top plate 21 is attached to the side plates 23 and 24, but is not in contact. It does not matter as long as the top plate 21 is rotated. Further, when the top plate 21 is removed from the side plates 23 and 24, the projection 21 moves back and forth while contacting the inner surface 31N of the outer frame 31. good.

本発明の第１の実施形態に係るエアフィルタの分解斜視図である。It is a disassembled perspective view of the air filter which concerns on the 1st Embodiment of this invention. 第１の実施形態において、天板が取り外されたときのエアフィルタ枠及びケーシングを示す斜視図である。In 1st Embodiment, it is a perspective view which shows an air filter frame and a casing when a top plate is removed. 天板を除くエアフィルタ枠を示す正面図である。It is a front view which shows the air filter frame except a top plate. 第１の実施形態における天板を示す側面図である。It is a side view which shows the top plate in 1st Embodiment. プレフィルタ枠の一部を示すための上面図である。It is a top view for showing a part of pre-filter frame. 第２の実施形態における天板を示す斜視図である。It is a perspective view which shows the top plate in 2nd Embodiment. 第３の実施形態における天板を示す斜視図である。It is a perspective view which shows the top plate in 3rd Embodiment.

Explanation of symbols

１０エアフィルタ
１１濾材パック
１２フィルタ枠
１３ケーシング
１４プレフィルタ
１７外枠
１８取付枠
２１天板
２２地板
２３左側板（側板）
２４右側板（側板）
３１天外枠部
３２地外枠部
３３左外枠部（側外枠部）
３４右外枠部（側外枠部）
４８、４９、７１、７２突起部
３６Ｌ、３６Ｒ穴
３７Ｌ、３７Ｒ嵌合凸部
４１前方天枠部
４２前方地枠部
４３前方左枠部（前方側枠部）
４４前方右枠部（前方側枠部）
６２立上片（突起部） DESCRIPTION OF SYMBOLS 10 Air filter 11 Filter medium pack 12 Filter frame 13 Casing 14 Pre filter 17 Outer frame 18 Mounting frame 21 Top plate 22 Base plate 23 Left side plate (side plate)
24 Right side plate (side plate)
31 Outer frame part 32 Outer frame part 33 Left outer frame part (side outer frame part)
34 Right outer frame (side outer frame)
48, 49, 71, 72 Protrusion part 36L, 36R Hole 37L, 37R Fitting convex part 41 Front top frame part 42 Front ground frame part 43 Front left frame part (front side frame part)
44 Front right frame (front frame)
62 Standing piece (projection)

Claims

Consists of side plates facing each other, a base plate that connects one end portions of the both side plates, and a top plate that is detachably attached to the base plates so as to face the base plate and connect the other end portions of the both side plates. A square frame-shaped air filter frame opened in front and rear,
A filter medium pack disposed inside the air filter frame;
An outer frame portion arranged on the outside of the top plate and spaced from the top plate;
Protruding from the vicinity of the rear end portion of the top plate or from the rear end portion toward the outer frame portion, and a tip portion contacting the inner surface of the outer frame portion,
The top plate is rotated so that the front end of the top plate is separated from the both side plates with the contact portion between the tip of the protrusion and the outer frame portion as a fulcrum, and is moved forward. An air filter that can be removed from the both side plates.

Each of both end portions connected to the both side plates of the top plate is provided with a rising piece raised toward the base plate along the outer surface of the side plate,
The rising piece is provided with a hole or a convex portion, and a fitting convex portion or a fitting hole is provided in the vicinity of the other end portion of each side plate at a position matching the hole or the convex portion,
The air filter according to claim 1, wherein when the top plate is attached to the both side plates, the hole or the convex portion is fitted into the fitting convex portion or the fitting hole.

The top plate has the contact portion as a fulcrum so that the fitting state of the hole or convex portion with the fitting convex portion or the fitting hole is removed and the front end portion of the top plate is separated from the both side plates. The air filter according to claim 2, wherein the air filter is rotated.

The air filter according to claim 2, wherein the convex portion or the hole is provided on the front side of a center position in the front-rear direction of the top plate.

The air filter according to claim 1, wherein the protrusion has a flat plate shape perpendicular to the front-rear direction of the air filter frame.

2. The air filter according to claim 1, wherein the protrusion has a semi-cylindrical shape in which a generatrix is orthogonal to the front-rear direction of the air filter frame and a curved surface is directed to the ceiling frame.

Both side outer frame portions arranged on the outer sides of the both side plates, an outer frame portion arranged on the outer side of the base plate and connecting one end portions of the both side outer frame portions, and the other end portions of the both side outer frame portions 2. The air filter according to claim 1, further comprising a casing that has a square frame shape and has a ceiling frame portion that connects the air filter frame, and the air filter frame is disposed and attached inside.

The air filter according to claim 1, wherein a front end portion of the top plate is disposed in front of a front end portion of the ceiling outer frame portion.

2. The air filter frame according to claim 1, further comprising a reinforcing portion that is detachably attached to the front end portion of the both side plates at the opening portion on the front side of the air filter frame so as to connect the front end portions thereof.

The reinforcing portion is composed of both front side frame portions, a front top frame portion connecting one end portions of the both front side frame portions, and a front ground frame portion connecting the other end portions of the both front side frame portions. A rectangular frame-shaped frame member,
The front ground frame portion is placed on the ground plate of the filter frame, and the front end portions of the both side plates of the filter frame are fitted into the both front side frame portions, whereby the frame member The air filter according to claim 9, wherein front ends of the plates are connected.

The air filter according to claim 10, wherein a pre-filter medium is attached to the inside of the frame member.

11. The air filter according to claim 10, wherein each of the front side frame portions is provided with a groove that opens rearward, and each front end portion of the side plates is fitted into the groove.

13. The air filter according to claim 12, wherein the groove is formed by a cross-sectional L-shaped member provided on an outer peripheral surface of each of the front side frame portions.

Each of both end portions connected to the both side plates of the top plate is provided with rising pieces raised toward the ground plate along the outer peripheral surface of the side plate,
11. The air filter according to claim 10, wherein a concave portion is provided in front of each of the rising pieces, and a connecting portion between the front side frame portion and the front top frame portion is fitted in each of the concave portions.

The front end portion of the top plate is provided with a first front rising piece raised toward the base plate, and the first front rising piece constitutes a part of the recess, and the frame member The air filter according to claim 14, wherein the air filter is sandwiched between a front end portion of the both side plates and the first front rising piece.

The front end portion of the base plate is provided with a second front rising piece raised toward the top plate, and the frame member includes the front end portions of the both side plates and the second front rising piece. The air filter according to claim 10, wherein the air filter is sandwiched between the air filter and the air filter.