JP5161531B2

JP5161531B2 - Filter media exchange type air filter

Info

Publication number: JP5161531B2
Application number: JP2007267826A
Authority: JP
Inventors: 敬造奥井
Original assignee: Nitta Corp
Current assignee: Nitta Corp
Priority date: 2007-10-15
Filing date: 2007-10-15
Publication date: 2013-03-13
Anticipated expiration: 2027-10-15
Also published as: JP2009095719A

Description

本発明はビル空調、産業空調等で使用され、フィルタ枠の内部に配置された濾材を、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 is used in building air-conditioning, industrial air-conditioning, and the like, and that can replace a filter medium disposed inside a filter frame by removing a top plate.

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、上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）。 It is known that the filter medium replacement in the air filter is performed, for example, by removing the filter plate top and extracting the filter medium pack from the upper surface, and then inserting a new filter medium pack (for example, Patent Documents). 1).

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、特許文献１の構成では、天板を取り外し、又はフィルタ枠の上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。 However, the air filter is usually used by being attached in a casing provided in an air conditioning facility or the like. For this reason, in the configuration of Patent Document 1, due to space limitations when the top plate is removed or the filter medium pack is replaced from the upper surface of the filter frame, the entire air filter is once removed from the casing, and then the filter medium pack is replaced. The replacement work must be 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る必要がある。 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 and removing the filter medium pack from the opening, it is necessary to push the filter medium pack into the frame 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ることにより、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、前面から濾材パックを取り出すことが可能であるため、エアフィルタ全体をケーシングから取り外さなくて良く、また、濾材パックを大きな力で押し込んでフィルタ枠の内部に挿入させる必要もなくなる。
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 the filter medium pack is put in and out from the front surface of the filter frame by swinging the top plate upward. A filter medium exchangeable air filter that can be used is disclosed. In this air filter, it is possible to take out the filter medium pack from the front surface. Therefore, it is not necessary to remove the entire air filter from the casing, and it is not necessary to push the filter medium pack with a large force and insert it into the filter frame.
Japanese Patent No. 3460032 Japanese Patent No. 3273333

しかし、特許文献２の濾材交換型エアフィルタでは、天板を取り外すことができないため、濾材交換を行うとき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。さらに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、揺動構造が複雑になる。また、天板は両側板に固定されていないので、両側板の上側部分を連結する部材がなく、側板の上側部分は撓みやすくなり、エアフィルタ枠の側板の強度が低下するという問題もある。 However, in the filter medium exchange type air filter of Patent Document 2, the top plate cannot be removed. Therefore, when the filter medium is exchanged, the top plate swung upward becomes an obstacle, and the work of exchanging the filter medium becomes complicated. Furthermore, since the top plate is swingably attached to the upper end of the side plate, the swing structure is complicated. Further, since the top plate is not fixed to the both side plates, there is no member connecting the upper portions of the both side plates, and the upper portions of the side plates are easily bent, and there is a problem that the strength of the side plates of the air filter frame is lowered.

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、天板を簡単な構造で取り外すことできると共に、側板の強度を十分に維持することができるエアフィルタ枠を提供することを目的とする。 Accordingly, the present invention has been made in view of the above problems, and provides an air filter frame that can remove the top plate with a simple structure and can sufficiently maintain the strength of the side plate. Objective.

本実施形態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ように配置される地板と、地板に対向し、かつ両側板の他端部を接続するように配置される天板とによって構成される四角枠形のエアフィルタ枠と、エアフィルタ枠の後方側の開口部において、両側板間を連結し、かつ少なくとも一部が天板の後端部に対向して設けられる連結部材と、連結部材において前方に向けて開口し、天板の後端部に沿って延びるスリットと、天板の後端部から後方に向けて突出し、スリットに嵌入する凸部とを備え、天板は、スリットが凸部に嵌入した状態で、天板の前端部が両側板から離れるように、凸部を中心に回動した後、凸部がスリットから抜き取られて、両側板から取り外されることを特徴とする。 The air filter according to the present embodiment is arranged so that both side plates facing each other, a ground plate arranged so as to connect 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 constituted by the top plate to be connected to each other at the rear side opening of the air filter frame, and at least a part thereof faces the rear end of the top plate. A connecting member provided in the connecting member, a slit that opens forward in the connecting member and extends along the rear end of the top plate, and a convex portion that protrudes rearward from the rear end of the top plate and fits into the slit. The top plate is pivoted around the convex portion so that the front end of the top plate is separated from the both side plates with the slit fitted into the convex portion. It is characterized by being removed from the plate.

天板の両側板に接続される両側端部それぞれには、側板の外周面に沿って、地板に向けて立ち上げられた立上片が連設され、立上片には、穴又は突起が設けられる一方、各側板の他端部近傍には穴又は突起に一致する位置に、嵌合突起又は嵌合穴が設けられることが好ましい。そして、穴又は突起が嵌合突起又は嵌合穴に嵌合することによって、天板の両側端部が両側板に固定される。なお、本発明においては、例えば、穴又は突起の嵌合突起又は嵌合穴との嵌合状態が外された後、天板はその前端部が両側板から離れるように回動させられる。突起又は穴は、各立上片において、前方側に設けられることが好ましい。 Each side end connected to the both side plates of the top plate is provided with a rising piece that is raised toward the ground plate along the outer peripheral surface of the side plate, and the rising piece has a hole or a protrusion. On the other hand, it is preferable that a fitting protrusion or a fitting hole is provided in the vicinity of the other end of each side plate at a position corresponding to the hole or the protrusion. And a hole or a protrusion fits into a fitting protrusion or a fitting hole, whereby both end portions of the top plate are fixed to the both side plates. In the present invention, for example, after the fitting state of the hole or protrusion with the fitting protrusion or the fitting hole is removed, the top plate is rotated so that the front end portion thereof is separated from the both side plates. The protrusion or hole is preferably provided on the front side of each rising piece.

連結部材は、両側板、天板及び地板それぞれの後端部に対向するように設けられた両後方側枠部、後方天枠部、及び後方地枠部から構成されて四角枠形に形成されることが好ましい。この場合、両側板それぞれの後端部は両後方側枠部に固定され、地板の後端部が後方地枠部に固定されると共に、スリットが後方天枠部に設けられる。 The connecting member is composed of both rear side frame portions, rear top frame portions, and rear ground frame portions provided to face the rear end portions of both side plates, the top plate, and the ground plate, and is formed in a square frame shape. It is preferable. In this case, the rear end portions of the both side plates are fixed to both rear side frame portions, the rear end portion of the base plate is fixed to the rear base frame portion, and a slit is provided in the rear top 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ることが好ましい。これにより側板は、その前方側及び後方側から補強されることとなる。 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. Thereby, a side plate will be reinforced from the front side and back side.

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。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。 The reinforcing part is composed of, for example, both front side frame parts, a front top frame part that connects one end parts of both front side frame parts, and a front ground frame part that connects the other end parts of both front side frame parts. This is a rectangular frame-shaped frame member. The front ground frame portion is placed on the base plate of the filter frame, and the front ends of the both side plates of the filter frame are fitted into the two front side frame portions, whereby the frame member connects the front end portions of the both side plates. .

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。前方両側枠部それぞれには、両側板の前端部に沿って延びる溝が設けられ、両側板の前端部それぞれは溝に嵌合することが好ましい。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。 It is preferable that a pre-filter medium is attached inside the frame member. Each of the front side frame portions is preferably provided with a groove extending along the front end portion of each side plate, and each front end portion of each side plate is preferably fitted into the groove. 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は、側板の他端部の外周面に沿って、地板に向けて立ち上げられた立上片が連設され、各立上片の前方側には凹部が設けられ、その凹部それぞれに前方側枠部と天枠部の接続部分が嵌合することが好ましい。 Each side end connected to the both side plates of the top plate is provided with a standing piece raised toward the ground plate along the outer peripheral surface of the other end portion of the side plate. It is preferable that a concave portion is provided on the side, and a connecting portion between the front side frame portion and the top frame portion is fitted in each of the concave portions.

天板の前端部には、例えば、地板に向けて立ち上げられた第１の前方立上片が連設され、第１の前方立上片は上記凹部の一部を構成する。そして、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ていることが好ましい。また、地板の前端部には、例えば天板に向けて立ち上げられた第２の前方立上片が連設される。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。 For example, a first front rising piece raised toward the main plate is connected to the front end of the top plate, and the first front rising piece constitutes a part of the recess. And it is preferable that the frame member is clamped by the front-end part of a both-sides board, and the 1st front standing piece. Moreover, the 2nd front standing piece raised toward the top plate, for example is connected with the front-end part of a ground plane. The frame member is preferably sandwiched between the front end portions of the side plates and the second front rising piece.

本発明では、天板を回動した後前方に引き抜くことにより、容易に取り外すことが可能であるので、濾材パックの交換が容易になる。また連結部材によって、両側板間が連結されているので、両側板が補強されて変形しにくくなる。 In the present invention, the filter plate can be easily replaced because it can be easily removed by rotating the top plate and pulling it forward. Moreover, since both the side plates are connected by the connecting member, the side plates are reinforced and are not easily deformed.

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を示す分解斜視図である。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、連結部材１３と、プレフィルタ１４とを備える。 The present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an air filter according to an embodiment of the present invention. The air filter 10 according to the present embodiment includes a filter medium pack 11, a filter frame 12, a connecting member 13, and a prefilter 14.

フィルタ枠１２は、互いに対向して配置される略矩形の天板２１、地板２２と、互いに対向して配置される略矩形の左側板２３、右側板２４とを備え、これらが組み立てられると四角枠形を呈する。組み立てられたフィルタ枠１２において、天板２１、地板２２は上下方向Ｈ（例えば鉛直方向）に垂直に配置される共に、左側板２３、右側板２４は左右方向Ｌ（例えば水平方向）に垂直に配置される。連結部材１３は、フィルタ枠１２の後方に配置され、フィルタ枠１２の背面に取り付けられている。フィルタ枠１２、連結部材１３、後述するプレフィルタ枠３９は、例えば、アルミ、亜鉛鋼板から形成される。 The filter frame 12 includes a substantially rectangular top plate 21 and a ground plate 22 that are arranged to face each other, and a substantially rectangular left side plate 23 and a right side plate 24 that are arranged to face each other. Presents a frame shape. In the assembled filter frame 12, the top plate 21 and the base plate 22 are arranged perpendicular to the vertical direction H (for example, vertical direction), and the left side plate 23 and the right side plate 24 are perpendicular to the horizontal direction L (for example, horizontal direction). Be placed. The connecting member 13 is disposed behind the filter frame 12 and attached to the back surface of the filter frame 12. The filter frame 12, the connecting member 13, and the prefilter frame 39 described later are formed from, for example, aluminum or galvanized steel.

濾材パック１１は、フィルタ枠１２の内部に配置されている。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。本実施形態においては、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 filter medium pack 11 is disposed inside the filter frame 12. 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. In the present embodiment, air flows from the opening 50F on the front side of the filter frame 12 toward the opening 50B on the rear side.

図２は、フィルタ枠及び連結部材の拡大斜視図である。図３は、天板を取り外したときのフィルタ枠を示す正面図である。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連結部材の構成を説明する。 FIG. 2 is an enlarged perspective view of the filter frame and the connecting member. FIG. 3 is a front view showing the filter frame when the top plate is removed. FIG. 4 is a side view of the top plate. Hereinafter, the configuration of the filter frame and the connecting member according to the present embodiment will be described with reference to FIGS.

連結部材１３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天枠部１３Ａ及び地枠部１３Ｂと、上下方向Ｈに延び、互いに平行に配置される両側枠部１３Ｃ、１３Ｄとによって形成される。 The connecting member 13 is formed in a plate-like flat rectangular frame shape, extends in the left-right direction L, and is arranged in parallel with each other, with the top frame portion 13A and the ground frame portion 13B arranged in parallel with each other. Formed by both side frame portions 13C and 13D.

フィルタ枠１２の地板２２及び両側板２３、２４の後端部２２Ｂ〜２４Ｂは、フィルタ枠１２の外側に向かって垂直に折り曲げられて、折り曲げ部２２Ｓ〜２４Ｓとして形成される。各折り曲げ部２２Ｓ〜２４Ｓそれぞれは、地枠部１３Ｂ、及び両側枠部１３Ｃ、１３Ｄそれぞれの前面１３Ｆに対向して当接しており、地枠部１３Ｂ、及び両側枠部１３Ｃ、１３Ｄそれぞれにボルト２７等によって固定されている。これにより、地板２２は、両側板２３、２４の下端部２３Ｄ、２４Ｄを接続するように配置され、地板２２及び両側板２３、２４は、図３に示すように前方から見るとコの字を呈する。また、連結部材１３は、後方側の開口部５０Ｂにおいて、両側板２３、２４間を連結し、両側板２３、２４の後方側が左右に撓むのを規制する補強部となる。 The base plate 22 of the filter frame 12 and the rear end portions 22B to 24B of the side plates 23 and 24 are bent vertically toward the outside of the filter frame 12 to form bent portions 22S to 24S. Each of the bent portions 22S to 24S is in contact with and opposed to the front surface 13F of the ground frame portion 13B and the side frame portions 13C and 13D, and the bolt 27 is applied to the ground frame portion 13B and the side frame portions 13C and 13D, respectively. It is fixed by etc. As a result, the base plate 22 is disposed so as to connect the lower end portions 23D and 24D of the side plates 23 and 24, and the base plate 22 and the side plates 23 and 24 have a U-shape when viewed from the front as shown in FIG. Present. In addition, the connecting member 13 serves as a reinforcing portion that connects the side plates 23 and 24 in the opening 50B on the rear side and restricts the rear side of the side plates 23 and 24 from bending to the left and right.

天板２１は、その下面が左側板２３、右側板２４の上端部２３Ｕ、２４Ｕに当接してこれらの上に載置されている。これにより、天板２１は、両側板２３、２４を接続しフィルタ枠１２は四角枠形に形成される。天板２１が左側板２３、右側板２４の上に載置された状態では、天板２１の後端部２１Ｂは天枠部１３Ａの前面１３Ｆに対向し、好ましくは当接している。 The lower surface of the top plate 21 is placed on the left side plate 23 and the upper end portions 23U and 24U of the right side plate 24 so as to be in contact therewith. Thereby, the top plate 21 connects the side plates 23 and 24, and the filter frame 12 is formed in a square frame shape. In a state where the top plate 21 is placed on the left side plate 23 and the right side plate 24, the rear end portion 21B of the top plate 21 faces the front surface 13F of the top frame portion 13A, and preferably abuts.

天枠部１３Ａには、天板２１の後端部２１Ｂが対向又は当接する位置において、前面１３Ｆから背面１３Ｇに向けて貫通する第１及び第２のスリット３１、３２が設けられる。第１及び第２のスリット３１、３２は、フィルタ枠１２の左右方向Ｌにおける中心位置Ｃ１を中心に対称的に配置され、それぞれ左右方向Ｌに沿って延び、すなわち、天板２１の後端部２１Ｂに沿って延びている。 The top frame portion 13A is provided with first and second slits 31 and 32 penetrating from the front surface 13F toward the back surface 13G at a position where the rear end portion 21B of the top plate 21 faces or abuts. The first and second slits 31 and 32 are symmetrically arranged with respect to the center position C1 in the left-right direction L of the filter frame 12 and extend along the left-right direction L, that is, the rear end portion of the top plate 21. It extends along 21B.

天板２１には、中心位置Ｃ１を中心に対称的に配置され、後端部２１Ｂから後方に向かって突出する第１及び第２の凸部３３、３４が形成される。第１及び第２の凸部３３、３４は、第１及び第２のスリット３１、３２に一致した位置に配置されて横長の略矩形に形成され、その横長さ（左右方向Ｌにおける長さ）は、第１及び第２のスリット３１、３２の長さより僅かに小さい。なお、第１及び第２の凸部３３、３４は、天板２１と同一の板から形成され、天板２１と同一平面上に配置されている。 The top plate 21 is formed with first and second convex portions 33 and 34 that are arranged symmetrically around the center position C1 and project rearward from the rear end portion 21B. The 1st and 2nd convex parts 33 and 34 are arrange | positioned in the position corresponding to the 1st and 2nd slits 31 and 32, are formed in a horizontally long substantially rectangular shape, The horizontal length (length in the left-right direction L) Is slightly smaller than the length of the first and second slits 31, 32. The first and second convex portions 33 and 34 are formed from the same plate as the top plate 21 and are arranged on the same plane as the top plate 21.

天板２１が両側板２３、２４の上端部２３Ｕ、２４Ｕの上に載置させられると、第１及び第２の凸部３３、３４が第１及び第２のスリット３１、３２に嵌入される。第１及び第２のスリット３１、３２のスリット幅は、天板２１（すなわち、第１及び第２の凸部３３、３４）の厚さよりも大きく、第１及び第２の凸部３３、３４は、第１及び第２のスリット３１、３２に嵌入した状態でも、僅かに上下方向に移動することが可能である。これにより、天板２１は、第１及び第２の凸部３３、３４を通る左右方向Ｌに延びる軸を中心に、その前端部２１Ｆが、両側板２３、２４から離れるように、上方に回動することが可能である。 When the top plate 21 is placed on the upper end portions 23U and 24U of the side plates 23 and 24, the first and second convex portions 33 and 34 are fitted into the first and second slits 31 and 32, respectively. . The slit widths of the first and second slits 31 and 32 are larger than the thickness of the top plate 21 (that is, the first and second convex portions 33 and 34), and the first and second convex portions 33 and 34 are formed. Can move slightly in the vertical direction even in the state of being fitted into the first and second slits 31 and 32. Accordingly, the top plate 21 is rotated upward so that the front end portion 21F is separated from the side plates 23 and 24 around the axis extending in the left-right direction L passing through the first and second convex portions 33 and 34. It is possible to move.

天板２１の左右方向における両端部（左端部２１Ｌ及び右端部２１Ｒ）は、下方に垂直に折り曲げられて、下方に向かって立ち上げられた板状の立上片３５Ｌ、３５Ｒに形成される。立上片３５Ｌ、３５Ｒそれぞれは、左側板２３、右側板２４の外周面に沿うように配置されている。 Both end portions (left end portion 21L and right end portion 21R) in the left-right direction of the top plate 21 are formed into plate-like rising pieces 35L, 35R that are bent vertically downward and raised downward. The rising pieces 35L and 35R are arranged along the outer peripheral surfaces of the left side plate 23 and the right side plate 24, respectively.

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における中央位置Ｃ２よりも前方側に配置される。一方、左側板２３、右側板２４それぞれの上端部２３Ｕ、２４Ｕ近傍の外周面には、穴３６Ｌ、３６Ｒに一致する位置に嵌合突起３７Ｌ、３７Ｒが設けられる。嵌合突起３７Ｌ、３７Ｒは穴３６Ｌ、３６Ｒに嵌合させられる。 Holes 36L and 36R are formed in the rising pieces 35L and 35R, respectively. The holes 36L and 36R are disposed on the front side of the center position C2 in the front-rear direction D of the top plate 21 (that is, the filter frame 12). On the other hand, fitting protrusions 37L and 37R are provided on the outer peripheral 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. The fitting protrusions 37L and 37R are fitted into the holes 36L and 36R.

嵌合突起３７Ｌ、３７Ｒが穴３６Ｌ、３６Ｒに嵌合させられた状態では、天板２１は両側板２３、２４の上に載置されている。また、この嵌合により天板２１は、両側板２３、２４に対して相対的に移動することが規制され、両側板２３、２４に固定されて取り付けられる。すなわち、突起３７Ｌ、３７Ｒが嵌合穴３６Ｌ、３６Ｒに嵌合すると、天板２１は上方に回動できなくなる。なお、立上片３５Ｌ、３６Ｒは、好ましくは両側板２３、２４を内側に向けて押圧するように配置されている。これにより、上記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、嵌合突起３７Ｌ、３７Ｒの穴３６Ｌ、３６Ｒへの嵌合状態は安定する。 In a state where the fitting protrusions 37L and 37R are fitted in the holes 36L and 36R, the top plate 21 is placed on the side plates 23 and 24. Further, the top plate 21 is restricted from moving relative to the side plates 23 and 24 by this fitting, and is fixedly attached to the side plates 23 and 24. That is, when the projections 37L and 37R are fitted in the fitting holes 36L and 36R, the top plate 21 cannot be rotated upward. The rising pieces 35L and 36R are preferably arranged so as to press both side plates 23 and 24 inward. As a result, both side plates 23 and 24 are restored to the outside by repelling the above pressing, so that the fitting state of the fitting protrusions 37L and 37R into the holes 36L and 36R is stabilized.

本実施形態では、天板２１の前端部２１Ｆ側が上方に強く引っ張られて突起３７Ｌ、３７Ｒが嵌合穴３６Ｌ、３６Ｒから抜き取られると、天板２１は上方に向けて回動可能になる。そして、天板２１が上方に回動された後、上斜め前方に向けて引っ張られることにより、第１及び第２の凸部３３、３４が第１及び第２のスリット３１、３２から抜き取られ、天板２１が両側板２３、２４の上から取り外されることとなる。 In the present embodiment, when the front end portion 21F side of the top plate 21 is strongly pulled upward and the projections 37L and 37R are extracted from the fitting holes 36L and 36R, the top plate 21 can be rotated upward. Then, after the top plate 21 is rotated upward, the first and second convex portions 33 and 34 are pulled out from the first and second slits 31 and 32 by being pulled upward and obliquely forward. The top plate 21 is removed from above the side plates 23 and 24.

また、取り外された天板２１は、天枠部１３Ａの前方に配置され、かつ前端部２１Ｆ側が僅かに斜め上を向くように傾けられた状態で、後方に押されることにより、第１及び第２の凸部３３、３４それぞれが第１及び第２のスリット３１、３２に挿入される。その後、天板２１が、第１及び第２の凸部３３、３４を中心に前端部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ると、嵌合突起３７Ｌ、３７Ｒの上に立上片３５Ｌ、３５Ｒが載せられた状態となる。次いで、天板２１が下方に向けて押圧されると、天板２１の両立上片３５Ｌ、３５Ｒが嵌合突起３７Ｌ、３７Ｒによって僅かに外側に広げられつつ、嵌合突起３７Ｌ、３７Ｒが穴３６Ｌ、３６Ｒに嵌合するまで天板２１が下方にさらに移動する。嵌合突起３７Ｌ、３７Ｒが穴３６Ｌ、３６Ｒに嵌合されると、天板２１が両側板２３、２４の上に載置され、天板２１が両側板２３、２４の上に取り付けられることとなる。このように、本実施形態では、天板２１は両側板２３、２４の上に着脱自在に取り付け可能である。 Further, the removed top plate 21 is disposed in front of the top frame portion 13A and is pushed rearward in a state where the front end portion 21F side is inclined slightly upward. The two convex portions 33 and 34 are inserted into the first and second slits 31 and 32, respectively. Thereafter, when the top plate 21 is rotated downward about the first and second convex portions 33, 34 so that the front end portion 21F approaches the side plates 23, 24, the fitting protrusions 37L, 37R The rising pieces 35L and 35R are placed on the top. Next, when the top plate 21 is pressed downward, the compatible pieces 35L and 35R of the top plate 21 are slightly spread outward by the fitting projections 37L and 37R, while the fitting projections 37L and 37R are formed in the holes 36L. The top plate 21 further moves downward until it is fitted to 36R. When the fitting protrusions 37L and 37R are fitted in the holes 36L and 36R, the top plate 21 is placed on the side plates 23 and 24, and the top plate 21 is attached on the side plates 23 and 24. Become. Thus, in this embodiment, the top plate 21 can be detachably mounted on the side plates 23 and 24.

図２、４に示すように、天板２１の前端部２１Ｆは、下方に向かって垂直に折り曲げられており、下方に向かって立ち上げられた板状の第１の前方立上片２８に形成される。第１の前方立上片２８は、天板２１の左端部２１Ｌから右端部２１Ｒにわたって設けられる。また、立上片３５Ｌ、３５Ｒの前方側は切り取られており、天板２１には、天板２１の下面と、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 front end portion 21 F of the top plate 21 is bent vertically downward, and is formed in a plate-like first front rising piece 28 raised downward. Is done. The first front rising piece 28 is provided from the left end portion 21L of the top plate 21 to the right end portion 21R. The front sides of the rising pieces 35L and 35R are cut off, and the top plate 21 includes a lower surface of the top plate 21, a back surface of the first front rising piece 28, and front ends of the rising pieces 35L and 35R. Concave portions 38L and 38R are formed by the surface.

図２に示すように、地板２２の前端部２２Ｆは、上方に向かって垂直に折り曲げられており、上方に向かって立ち上げられた板状の第２の前方立上片２９に形成される。第２の前方立上片２９は、地板２２の左端部２２Ｌから右端部２２Ｒにわたって設けられる。前後方向Ｄにおける両側板２３、２４の長さは、前後方向Ｄにおける天板２１、地板２２の長さより短く、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が形成されている。なお、天板２１が取り付けられた状態では、両側板２３、２４の前端部２３Ｆ、２４Ｆは、立上片３５Ｌ、３５Ｒの前端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。 As shown in FIG. 2, the front end portion 22 F of the base plate 22 is bent vertically upward, and is formed in a plate-like second front rising piece 29 raised 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 lengths of the side plates 23 and 24 in the front-rear direction D are shorter than the lengths of the top plate 21 and the base plate 22 in the front-rear direction D, and the front rising portions 28 and 29 and the front end portions 23F and 24F of the left and right side plates 23 and 24 A gap 47 is formed between them. In the state where the top plate 21 is attached, the front end portions 23F, 24F of the side plates 23, 24 are arranged on the front side from the front ends of the rising pieces 35L, 35R. 24F is disposed inside the recesses 38L and 38R.

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、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、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 inwardly and then vertically upward and is bent twice. It does not have to be folded. 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. However, it does not need to be folded.

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の内周面はフラットな平面に形成される。側板２３、２４の前端部２３Ｆ、２４Ｆは、外側に向けてムダ折りされて、そのムダ折りされた部分５１は、側板２３、２４の外周面に密着するように形成されるが、ムダ折りされていなくても良い。 The side plates 23 and 24 are not bent inward, and the inner peripheral surfaces of the side plates 23 and 24 are formed in a flat plane. The front end portions 23F, 24F of the side plates 23, 24 are waste-folded outward, and the waste-folded portion 51 is formed so as to be in close contact with the outer peripheral surfaces of the side plates 23, 24. It does not have to be.

再び図１を参照して本実施形態に係る濾材パック及びプレフィルタの構成を説明する。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に平行にされ、かつその背面１１Ｂが連結部材１３の前面１３Ｆに当接するように、フィルタ枠１２の内部に配置される。 With reference to FIG. 1 again, the configurations of the filter medium pack and the prefilter according to this embodiment will be described. 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 medium pack 11 is disposed inside the filter frame 12 such that the folds are parallel to the vertical direction and the back surface 11B is in contact with the front surface 13F of the connecting member 13.

濾材パック１１の上下の端面１１Ｕ、１１Ｄそれぞれには、例えばクッション性を有するシート性の第１のシール材１５が取り付けられており、各端面１１Ｕ、１１Ｄは、シール材１５を介して、天板２１及び地板２２の内周面に圧接されている。これにより、天板２１及び地板２２の内周面と、濾材パック１１の各端面１１Ｕ、１１Ｄそれぞれの間は、各第１のシール材１５によってシールされると共に、濾材パック１１の端面１１Ｕ、１１Ｄは、第１のシール材１５を介して天板２１及び地板２２に支持される。 For example, a sheet-like first sealing material 15 having cushioning properties is attached to each of the upper and lower end surfaces 11U and 11D of the filter medium pack 11, and the end surfaces 11U and 11D are connected to the top plate via the sealing material 15. 21 and the inner peripheral surface of the main plate 22 are pressed against each other. As a result, the space between the inner peripheral surfaces of the top plate 21 and the base plate 22 and the respective end surfaces 11U, 11D of the filter media pack 11 is sealed by the respective first sealing materials 15, and the end surfaces 11U, 11D of the filter media pack 11 are sealed. Is supported by the top plate 21 and the main plate 22 through the first sealing material 15.

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の全面に取り付けられている。 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 attached to the entire surface.

同様に、濾材パック１１の左右の端面１１Ｌ、１１Ｒそれぞれにも、第２シール材１６が取り付けられる。これにより、両側板２３、２４の内周面と、左右の端面１１Ｌ、１１Ｒそれぞれの間が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、左右の端面１１Ｌ、１１Ｒの一部分に取り付けられる。なお、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。 Similarly, the second sealing material 16 is attached to each of the left and right end faces 11L, 11R of the filter media pack 11. Thereby, 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, and the left and right end surfaces 11L and 11R are connected to the side plates 23 and 24 via the second sealing material 16, respectively. 24. However, since the left and right end surfaces 11L and 11R are configured by one folded wall of one pleat mountain, the second sealing material 16 is attached to a part of the left and right end surfaces 11L and 11R. In addition, the 1st and 2nd sealing materials 15 and 16 are comprised with sheet-like elastic materials, such as a fiber material, a foam, and sponge, for example. Note that the second sealing material 16 may be omitted.

プレフィルタ１４は、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、左右方向Ｌに延びて互いに平行に配置される天枠部４１及び地枠部４２と、上下方向Ｈに延びて互いに平行に配置され、天枠部４１、地枠部４２の左右の端部それぞれを接続する左右の側枠部４３、４４とによって構成され、四角枠形に形成される。 The prefilter 14 includes a prefilter frame 39 and a prefilter medium 40. The pre-filter frame 39 extends in the left-right direction L and is arranged parallel to each other, and the pre-filter frame 39 extends in the vertical direction H and is arranged parallel to each other. And left and right side frame portions 43 and 44 connecting the left and right end portions, respectively, and 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、左右の側枠部４３、４４、天枠部４１、及び地枠部４２に接着又は固定されることにより、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 pre-filter medium 40 is mounted inside the pre-filter frame 39 by bonding or fixing the left and right and upper and lower end faces thereof to the left and right side frame parts 43 and 44, the top frame part 41, and the ground frame part 42. The

図１、５に示すように、プレフィルタ枠３９の側枠部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、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、４４Ｓ及び第２の突出部４５Ｂを溝側壁とする溝４６Ｌ、４６Ｒを形成し、これら溝４６Ｌ、４６Ｒは後方に向けて開口している。 As shown in FIGS. 1 and 5, L-shaped members 45 L and 45 R extending in the vertical direction are connected to the outer peripheral surfaces 43 S and 44 S of the side frame portions 43 and 44 of the pre-filter frame 39. 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. Each of the cross-section L-shaped members 45L and 45R includes a first protrusion 45A that protrudes outward from the outer peripheral surfaces 43S and 44S, and a second protrusion that protrudes rearward from the tip of the first protrusion 45A. Part 45B. 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 surfaces 43S and 44S and the second protrusion 45B as the groove side walls. 46R are 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、地枠部４２の下面が地板２２の上面に置かれることにより、プレフィルタ枠３９はフィルタ枠１２に取り付けられ、濾材パック１１の前方に配置される。そして、天板２１が左右の側板２３、２４の上に載置させられ、突起３７Ｌ、３７Ｒが嵌合穴３６Ｌ、３６Ｒに嵌合した状態では、プレフィルタ枠３９の左側枠部４３、右側枠部４４それぞれと天枠部４１との接続部分５３Ｌ、５３Ｒは天板２１の凹部３８Ｌ、３８Ｒ（図２参照）に嵌合される。 The front end portions 23F and 24F of the left side plate 23 and the right side plate 24 are fitted inside the grooves 46L and 46R, and the lower surface of the ground frame portion 42 is placed on the upper surface of the ground plate 22, whereby the prefilter frame 39 is It is attached to the filter frame 12 and disposed in front of the filter medium pack 11. When the top plate 21 is placed on the left and right side plates 23 and 24 and the projections 37L and 37R are fitted in the fitting holes 36L and 36R, the left frame portion 43 and the right frame of the prefilter frame 39 are mounted. Connection portions 53L and 53R between each of the portions 44 and the top frame portion 41 are fitted into the recesses 38L and 38R (see FIG. 2) of the top plate 21.

天板２１が取り外された後、プレフィルタ枠３９は、上方に持ち上げられると共に、前方に引っ張られて、溝４６Ｌ、４６Ｒから前端部２３Ｆ、２４Ｆが抜き取られることにより、フィルタ枠１２から取り外される。一方、プレフィルタ枠３９は、上述したように、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、地枠部４２の下面が地板２２の上面に置かれることにより、フィルタ枠１２に取り付けられる。すなわち、プレフィルタ枠３９はフィルタ枠１２に着脱自在に取り付け可能である。 After the top plate 21 is removed, the pre-filter frame 39 is lifted upward and pulled forward, and the front end portions 23F and 24F are removed from the grooves 46L and 46R, thereby being removed from the filter frame 12. On the other hand, as described above, in the pre-filter frame 39, the front end portions 23F and 24F of the left side plate 23 and the right side plate 24 are fitted in the grooves 46L and 46R, and the bottom surface of the ground frame portion 42 is the bottom plate 22. It is attached to the filter frame 12 by being placed on the upper surface of the filter frame 12. That is, the pre-filter frame 39 can be detachably attached to the filter frame 12.

プレフィルタ枠３９の地枠部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、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 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 top frame portion 41 is pressed against the back surface of the first front rising piece 28. ing. Therefore, the pre-filter frame 39 is sandwiched between the front rising pieces 28 and 29 and 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.

本実施形態のエアフィルタ１０は、天板２１、プレフィルタ枠３９が順に取り外された後、使用済みの濾材パック１１がシール材１５、１６と共に、フィルタ枠１２から取り出される。次いで、新たな濾材パック１１がシール材１５、１６と共に、フィルタ枠１２の内部に装着され、濾材パック１１が交換される。濾材パック１１交換後、プレフィルタ枠３９、天板２１が順にフィルタ枠１２に取り付けられて、再度エアフィルタ１０が組み立てられる。 In the air filter 10 of this embodiment, after the top plate 21 and the pre-filter frame 39 are removed in order, the used filter media pack 11 is taken out from the filter frame 12 together with the seal materials 15 and 16. Next, a new filter media pack 11 is mounted inside the filter frame 12 together with the seal materials 15 and 16, and the filter media pack 11 is replaced. After the filter medium pack 11 is replaced, the pre-filter frame 39 and the top plate 21 are attached to the filter frame 12 in order, and the air filter 10 is assembled again.

以上のように、本実施形態においては、天板２１を簡単な方法で回動して取り外すことできるので、濾材パック１１の交換を前方側から容易に行うことができる。また、天板２１は、上方へ僅かに回動した後に前方に引っ張っても取り外すことができるので、天板２１の上方に十分なスペースがなくても天板２１を取り外すことができる。したがって、本実施形態では、例えば、エアフィルタ１０をケーシングから取り出さなくても、濾材パック１１の交換を行うことが可能になる。なお、両側板２３、２４の前端部２３Ｆ、２４Ｆは内側に向けて折り曲げられていないので、本実施形態では、濾材パック１１は僅かに上方に持ち上げた状態で、前面側から出し入れすることができる。 As mentioned above, in this embodiment, since the top plate 21 can be rotated and removed by a simple method, the filter medium pack 11 can be easily replaced from the front side. Moreover, since the top plate 21 can be removed even if the top plate 21 is slightly rotated upward and pulled forward, the top plate 21 can be removed even if there is not enough space above the top plate 21. Therefore, in this embodiment, for example, the filter pack 11 can be replaced without removing the air filter 10 from the casing. In addition, since the front end portions 23F and 24F of the side plates 23 and 24 are not bent inward, in this embodiment, the filter media pack 11 can be taken in and out from the front side while being slightly lifted upward. .

なお、本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が配設されるが、プレフィルタ１４は配設さ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 the present embodiment, the prefilter 14 is disposed in front of the filter pack 11, but the prefilter 14 may not be disposed. 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、本実施形態では、連結部材１３が四角枠形であったが、四角枠形でなくても良く、例えば、両側板２３、２４の後端部２３Ｂ、２４Ｂを連結する板状の連結部材であっても良い。 In the present embodiment, the connecting member 13 has a rectangular frame shape. However, the connecting member 13 does not have to be a rectangular frame shape. For example, the connecting member 13 is a plate-like connecting member that connects the rear end portions 23B and 24B of the side plates 23 and 24. It may be.

さらに、本実施形態では、天板２１の立上片３５Ｌ、３５Ｒに穴が、両側板２３、２４に嵌合突起が設けられたが、立上片３５Ｌ、３５Ｒそれぞれの内周面に突起が、両側板２３、２４に各突起が嵌合するための嵌合穴が穿設されていても良い。 Further, in the present embodiment, the rising pieces 35L and 35R of the top plate 21 are provided with holes and the both side plates 23 and 24 are provided with fitting protrusions. However, the protrusions are provided on the inner peripheral surfaces of the rising pieces 35L and 35R. The both side plates 23 and 24 may be provided with fitting holes for fitting the respective projections.

なお、連結部材１３はその厚さが薄い板状部材であり、第１及び第２のスリット３１、３２は連結部材１３を貫通して設けられるが、連結部材１３が肉厚な場合、スリット３１、３２は連結部材を貫通していなくても良い。但しこの場合も、第１及び第２のスリット３１、３２は、前方に向けて開口している。 The connecting member 13 is a thin plate-like member, and the first and second slits 31 and 32 are provided through the connecting member 13, but when the connecting member 13 is thick, the slit 31 is provided. , 32 may not penetrate through the connecting member. However, also in this case, the first and second slits 31 and 32 are opened forward.

本発明の一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 one Embodiment of this invention. 天板が取り外されたときのエアフィルタ枠及び連結部材を示す斜視図である。It is a perspective view which shows an air filter frame and a connection member when a top plate is removed. 天板を除くエアフィルタ枠を示す斜視図である。It is a perspective view which shows the air filter frame except a top plate. 天板を示す側面図である。It is a side view which shows a top plate. 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.

Explanation of symbols

１０エアフィルタ
１１濾材パック
１２フィルタ枠
１３連結部材
１３Ａ天枠部（後方天枠部）
１３Ｂ地枠部（後方地枠部）
１３Ｃ、１３Ｄ側枠部（後方側枠部）
１４プレフィルタ
２１天板
２２地板
２３左側板
２４右側板
３１、３２第１及び第２のスリット
３３、３４第１及び第２の凸部
３６Ｌ、３６Ｒ穴
３７Ｌ、３７Ｒ嵌合突起
４１天枠部（前方天枠部）
４２地枠部（前方地枠部）
４３、４４側枠部（前方側枠部） DESCRIPTION OF SYMBOLS 10 Air filter 11 Filter medium pack 12 Filter frame 13 Connecting member 13A Top frame part (rear ceiling frame part)
13B Ground frame part (rear ground frame part)
13C, 13D Side frame (rear frame)
14 Pre-filter 21 Top plate 22 Base plate 23 Left side plate 24 Right side plate 31, 32 First and second slits 33, 34 First and second convex portions 36L, 36R Holes 37L, 37R Fitting projection 41 Top frame portion ( Front ceiling frame)
42 Ground frame (front frame)
43, 44 Side frame (front frame)

Claims

By both side plates facing each other, a ground plate disposed so as to connect one end portions of the both side plates, and a top plate disposed so as to face the ground plate and connect the other end portions of the both side plates. A square frame-shaped air filter frame,
A connecting member that connects the two side plates at an opening on the rear side of the air filter frame, and at least a part of the connecting member is opposed to the rear end of the top plate;
A slit that opens forward in the connecting member and extends along a rear end of the top plate;
A rearward projecting portion from the rear end of the top plate, and a convex portion that fits into the slit,
The top plate is rotated around the convex portion so that the front end portion of the top plate is separated from the both side plates in a state where the slit is fitted into the convex portion, and then the convex portion is separated from the slit. An air filter that is extracted and 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 peripheral surface of the side plate,
While the upright piece is provided with a hole or a protrusion, a fitting protrusion or a fitting hole is provided near the other end of each side plate at a position that matches the hole or protrusion,
The air filter according to claim 1, wherein the top plate is fixed to the both side plates by fitting the holes or projections into the fitting projections or fitting holes.

The top plate is rotated so that the front end portion thereof is separated from the both side plates after the fitting state of the hole or projection with the fitting projection or fitting hole is removed. 2. The air filter according to 2.

The air filter according to claim 2, wherein the protrusion or the hole is provided on the front side of each of the rising pieces.

The connecting member is composed of both rear side frame portions, rear top frame portions, and rear ground frame portions provided to face rear end portions of the both side plates, the top plate, and the ground plate, and is a square frame shape. Formed into
The rear end portions of the both side plates are fixed to the rear frame portions, the rear end portion of the base plate is fixed to the rear frame portion, and the slit is provided in the rear ceiling frame portion. The air filter according to claim 1.

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 so as to connect the front end portions of the two side plates at the opening portion on the front side of the air filter frame.

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 ends of the both side plates of the filter frame are fitted into the front frame portions, respectively, so that the frame member becomes the both side plates. The air filter according to claim 6, wherein front ends of the air filters are connected.

The air filter according to claim 7, wherein a pre-filter medium is attached inside the frame member.

The air according to claim 7, wherein each of the front side frame portions is provided with a groove extending along a front end portion of the both side plates, and each front end portion of the both side plates is fitted into the groove. filter.

10. The air filter according to claim 9, 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 a rising piece raised toward the base plate along the outer peripheral surface of the side plate,
The air filter according to claim 7, wherein a concave portion is provided on a front side of each of the rising pieces, and a connection portion between the front side frame portion and the front top frame portion is fitted in each of the concave portions. .

At the front end of the top plate, a first front rising piece raised toward the main plate is connected, and the first front rising piece constitutes a part of the recess, and the frame The air filter according to claim 11, wherein the member 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 side plates and the second front standing portion. The air filter according to claim 7, wherein the air filter is sandwiched between upper pieces.