JP2009297592A

JP2009297592A - Filter device

Info

Publication number: JP2009297592A
Application number: JP2008151440A
Authority: JP
Inventors: Satoru Shimada; 哲島田
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2008-06-10
Filing date: 2008-06-10
Publication date: 2009-12-24
Anticipated expiration: 2028-06-10
Also published as: JP5284690B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter device that allows easy replacement of its filter. <P>SOLUTION: The filter device 1 includes a case member 2 to which a filter 3 can detachably be attached, and press members 8, 9 rotatably attached to the case member 2 around their rotation axes. The press members 8, 9 are turnable between a locked position of the filter 3 and an unlocked position of the filter 3, and are deformable between the locked state of rotation and the unlocked state of rotation. The press members 8, 9 are put into the locked state of rotation at the locked position of the filter 3, and made turnable from the locked position of the filter 3 to the unlocked position of the filter 3 by changing the locked state of rotation to the unlocked state of rotation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、フィルター交換の作業性を向上したフィルター装置に関するものである。 The present invention relates to a filter device with improved filter replacement workability.

従来、フィルター装置の構造として、振動やファンの風圧等でフィルターが外れるのを防止するために、押え具でフィルターを押さえる構造が知られている（例えば特許文献１参照）。従来のフィルター装置では、取付ケースの側面に押え具を挿入する取付孔が設けられている。そして、取付けの作業を行うときには、フィルターを押さえながら取付孔に押え具を挿入し、取付ケースのフランジと押え具とによって吸込開口部を挟み込み、取付ケースがフィルターとともに取り付けられる。
特開平９−１４２１４０号公報 2. Description of the Related Art Conventionally, as a structure of a filter device, a structure in which a filter is pressed with a presser is known in order to prevent the filter from being detached due to vibration or fan wind pressure (see, for example, Patent Document 1). In the conventional filter device, a mounting hole for inserting a presser is provided on the side surface of the mounting case. When performing the mounting operation, the presser is inserted into the mounting hole while holding the filter, the suction opening is sandwiched between the flange of the mounting case and the presser, and the mounting case is mounted together with the filter.
JP-A-9-142140

しかしながら、従来のフィルター装置においては、フィルター交換の作業を行う際、押え具を取付ケースから取り外したときに、押え具などの部品が落下したり紛失したりするおそれがあるという問題があった。また、従来のフィルター装置では、フィルター交換の作業を片手で行うのは容易でないという問題があった。特に、脚立などを用いた高所での作業の場合には、フィルター交換の作業を両手で行うことは、作業者の安全性の観点からも好ましくない。 However, the conventional filter device has a problem that parts such as the presser may be dropped or lost when the presser is removed from the mounting case when the filter is exchanged. Further, the conventional filter device has a problem that it is not easy to perform filter replacement work with one hand. In particular, in the case of work at a high place using a stepladder or the like, it is not preferable from the viewpoint of operator safety to perform the filter replacement work with both hands.

本発明は、上記従来の問題を解決するためになされたもので、フィルター交換の作業を容易に行うことのできるフィルター装置を提供することを目的とする。 The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a filter device that can easily perform filter replacement work.

本発明のフィルター装置は、フィルターが着脱可能に装着されるケース部材と、前記ケース部材に回転軸を中心に回転可能に取り付けられ、装着された前記フィルターを押える押さえ部材と、を備えたフィルター装置において、前記押さえ部材は、装着された前記フィルターを固定するフィルター固定位置と前記フィルターの固定を解除するフィルター固定解除位置との間で回動可能であり、かつ、前記ケース部材に対する回転がロックされる回転ロック状態と前記回転のロックが解除される回転アンロック状態との間で変形可能であり、前記フィルター固定位置において、前記押さえ部材は前記回転ロック状態となり、前記回転ロック状態を前記回転アンロック状態にすることにより、前記押さえ部材は前記フィルター固定位置から前記フィルター固定解除位置へ回動可能になる構成を有している。 The filter device of the present invention comprises a case member to which a filter is detachably attached, and a pressing member that is attached to the case member so as to be rotatable about a rotation shaft and presses the attached filter. The pressing member is rotatable between a filter fixing position for fixing the mounted filter and a filter fixing releasing position for releasing the filter fixing, and rotation with respect to the case member is locked. Between the rotation locked state and the rotation unlocked state in which the rotation lock is released. At the filter fixing position, the pressing member is in the rotation locked state, and the rotation locked state is changed to the rotation unlocked state. By setting the locked state, the pressing member is moved from the filter fixing position to the filter. Has a structure obtained can rotate to Luther unlocking position.

この構成により、押さえ部材はフィルター固定位置で回転ロック状態となっているので、この押さえ部材によってフィルターはしっかりと押さえられている。フィルター交換の作業を行うときには、まず、フィルター固定位置で回転ロック状態となっている押さえ部材を回転アンロック状態にし、フィルター固定位置からフィルター固定解除位置まで回動させる。押さえ部材をフィルター固定解除位置にした状態で、フィルターの交換を行い、その後、押さえ部材をフィルター固定解除位置からフィルター固定位置まで回動させると、押さえ部材は回転ロック状態となる。このようにして、フィルター交換の作業を容易に行うことができる。したがって、フィルター交換の作業を片手でも容易に行うことができ、高所におけるフィルター交換作業の安全性が向上する。 With this configuration, since the pressing member is in a rotation locked state at the filter fixing position, the filter is firmly pressed by the pressing member. When performing the filter replacement work, first, the pressing member that is in the rotation locked state at the filter fixing position is set in the rotation unlocked state and rotated from the filter fixing position to the filter fixing releasing position. When the filter is exchanged in a state where the pressing member is in the filter fixing release position, and then the pressing member is rotated from the filter fixing releasing position to the filter fixing position, the pressing member is in a rotation locked state. In this way, the filter replacement operation can be easily performed. Therefore, the filter replacement work can be easily performed with one hand, and the safety of the filter replacement work at a high place is improved.

また、本発明のフィルター装置では、前記押さえ部材は、前記フィルターの形状に対応した屈曲形状を有し、前記押さえ部材の両端部には、前記押さえ部材を弾性力に抗して変形させるつまみ操作を行うためのつまみ部が突出して設けられており、前記フィルター固定位置において、前記つまみ操作を行なっていない状態では、前記つまみ部が前記ケース部材に係止して、前記押さえ部材が前記回転ロック状態となり、前記フィルター固定位置において、前記つまみ操作を行った状態では、前記つまみ部の係止が解除されて、前記押さえ部材が前記回転アンロック状態となる構成を有している。 In the filter device of the present invention, the pressing member has a bent shape corresponding to the shape of the filter, and a knob operation that deforms the pressing member against elastic force at both ends of the pressing member. In the state where the knob operation is not performed at the filter fixing position, the knob portion is locked to the case member, and the pressing member is locked to the rotation lock. When the knob operation is performed at the filter fixing position, the knob portion is unlocked and the pressing member is in the rotation unlocked state.

この構成により、フィルター交換の作業を行うときには、まず、フィルター固定位置でつまみ操作を行って、つまみ部の係止を解除し、押さえ部材を回転アンロック状態にする。そして、押さえ部材をフィルター固定位置からフィルター固定解除位置まで回動させて、フィルターの交換を行い、その後、押さえ部材をフィルター固定解除位置からフィルター固定位置まで回動させる。このとき、フィルター固定位置でつまみ操作を行っていなければ、押さえ部材は回転ロック状態となる。このようにして、フィルター交換の作業を容易に行うことができる。 With this configuration, when the filter replacement operation is performed, first, a knob operation is performed at the filter fixing position, the locking of the knob portion is released, and the pressing member is brought into the rotation unlocked state. Then, the pressing member is rotated from the filter fixing position to the filter fixing release position to replace the filter, and then the pressing member is rotated from the filter fixing release position to the filter fixing position. At this time, if the knob operation is not performed at the filter fixing position, the pressing member is in a rotation locked state. In this way, the filter replacement operation can be easily performed.

また、本発明のフィルター装置では、前記押さえ部材は、前記フィルターの少なくとも半分の周縁部を押える第１押さえ部材と、前記フィルターの残り半分の周縁部を押える第２押さえ部材とを含み、前記第１押さえ部材および前記第２押さえ部材は、前記フィルター固定位置において、前記ケース部材に対して前記回転ロック状態となるとともに互いの相対回転がロックされた相対回転ロック状態となり、前記回転ロック状態を前記回転アンロック状態にすることにより、互いの相対回転のロックが解除された相対回転アンロック状態となって、前記フィルター固定位置から前記フィルター固定解除位置へ回動可能になり、前記フィルター固定解除位置において、前記ケース部材に対して前記回転アンロック状態となるとともに互いの相対回転がロックされた相対回転ロック状態になる構成を有している。 In the filter device of the present invention, the pressing member includes a first pressing member that presses at least a half edge of the filter, and a second pressing member that presses the other half edge of the filter. The first pressing member and the second pressing member are in the rotation locked state with respect to the case member and in the relative rotation locked state in which the relative rotation is locked in the filter fixing position, and the rotation locked state is By setting the rotation unlocked state, the relative rotation unlocked state where the relative rotation of each other is unlocked can be rotated from the filter fixing position to the filter fixing releasing position, and the filter fixing releasing position. In the rotation unlocked state with respect to the case member and relative to each other Rolling has a structure obtained in relative rotation locked state of being locked.

この構成により、第１押さえ部材と第２押さえ部材はフィルター固定位置で回転ロック状態かつ相対回転ロック状態となっているので、第１押さえ部材および第２押さえ部材によってフィルターはしっかり押さえられている。フィルター交換の作業を行うときには、まず、フィルター固定位置で回転ロック状態となっている第１押さえ部材と第２押さえ部材を回転アンロック状態にすることにより、相対回転ロック状態を相対回転アンロック状態にし、第１押さえ部材と第２押さえ部材をフィルター固定位置からフィルター固定解除位置まで相対的に回動させる。フィルター固定解除位置では、第１押さえ部材と第２押さえ部材は回転アンロック状態かつ相対回転ロック状態になる。この状態で、フィルターの交換を行い、その後、第１押さえ部材と第２押さえ部材を相対回転アンロック状態にして、フィルター固定解除位置からフィルター固定位置まで回動させ、押さえ部材は回転ロック状態かつ相対回転ロック状態となる。このようにして、フィルター交換の作業を容易に行うことができる。 With this configuration, the first pressing member and the second pressing member are in the rotation locked state and the relative rotation locked state at the filter fixing position, so that the filter is firmly pressed by the first pressing member and the second pressing member. When performing the filter replacement operation, first, the relative rotation locked state is changed to the relative rotation unlocked state by setting the first pressing member and the second pressing member that are in the rotation locked state at the filter fixing position to the rotation unlocked state. The first pressing member and the second pressing member are relatively rotated from the filter fixing position to the filter fixing release position. At the filter fixing release position, the first pressing member and the second pressing member are in the rotation unlocked state and the relative rotation locked state. In this state, the filter is replaced, and thereafter, the first pressing member and the second pressing member are brought into the relative rotation unlocked state and rotated from the filter fixing release position to the filter fixing position. The relative rotation lock state is set. In this way, the filter replacement operation can be easily performed.

また、本発明のフィルター装置では、前記第１押さえ部材は、前記フィルターの少なくとも半分の周縁部に対応した屈曲形状を有し、両端部の上部から突出する係止片と、両端部の下部に形成された第１テーパ部とを備え、前記第２押さえ部材は、前記フィルターの残り半分の周縁部に対応した屈曲形状を有し、両端部の上部に設けられた第１係止部と、前記第１係止部との間に段差部を介して設けられた第２係止部と、両端部の下部に形成された第２テーパ部とを備え、前記第１押さえ部材および前記第２押さえ部材は、前記フィルター固定位置において、前記第１押さえ部材および前記第２押さえ部材の下面が前記フィルターの上面に当接して前記回転ロック状態となるとともに、前記係止片が前記第１係止部に係止して前記相対回転ロック状態となり、前記回転ロック状態を前記回転アンロック状態にすることにより、前記係止片の前記第１係止部への係止が解除されて、前記相対回転ロック状態が前記相対回転アンロック状態となり、前記フィルター固定位置から前記フィルター固定解除位置まで回動させたときに、前記係止片が前記段差部を乗り越えて前記第２係止部に係止して、前記相対アンロック状態が前記相対回転ロック状態となり、前記フィルター固定解除位置において、前記第１テーパ部および前記第２テーパ部の下面と前記フィルターの上面との間に隙間が形成されている構成を有している。 In the filter device of the present invention, the first pressing member has a bent shape corresponding to at least a half of the peripheral edge of the filter, and has a locking piece protruding from the upper part of both end parts and a lower part of both end parts. A first taper portion formed, and the second pressing member has a bent shape corresponding to the peripheral edge of the remaining half of the filter, and a first locking portion provided at the top of both end portions, A second locking portion provided between the first locking portion via a stepped portion and a second taper portion formed at a lower portion of both end portions; the first pressing member and the second pressing member; In the filter fixing position, the lower surface of the first pressing member and the second pressing member comes into contact with the upper surface of the filter to enter the rotation locked state, and the locking piece is in the first locking state. The relative rotation rod When the rotation lock state is changed to the rotation unlock state, the engagement of the engagement piece with the first engagement portion is released, and the relative rotation lock state becomes the relative rotation unlock. When the filter is rotated from the filter fixing position to the filter fixing release position, the locking piece gets over the stepped portion and locks to the second locking portion, and the relative unlocked state is In the relative rotation locked state, a gap is formed between the lower surface of the first taper portion and the second taper portion and the upper surface of the filter at the filter fixing release position.

この構成により、フィルター固定位置で第１押さえ部材と第２押さえ部材の下面がフィルターの上面に当接し、かつ、係止片が第１係止部に係止しているので、第１押さえ部材および第２押さえ部材によってフィルターはしっかり押さえられている。回転ロック状態を回転アンロック状態にすることにより、係止片の第１係止部への係止が解除され、第１押さえ部材と第２押さえ部材が相対回転アンロック状態になる。第１押さえ部材と第２押さえ部材をフィルター固定解除位置まで相対的に回動させると、係止片が段差部を乗り越えて前記第２係止部に係止して、第１押さえ部材と第２押さえ部材が相対回転ロック状態になる。フィルター固定解除位置では、第１テーパ部と第２テーパ部の下面とフィルターの上面との間に隙間が形成されており、その隙間を用いてフィルターの交換を行うことができる。このようにして、フィルター交換の作業を容易に行うことができる。 With this configuration, the lower surfaces of the first pressing member and the second pressing member are in contact with the upper surface of the filter at the filter fixing position, and the locking piece is locked to the first locking portion. The filter is firmly pressed by the second pressing member. By setting the rotation lock state to the rotation unlock state, the engagement of the engagement piece with the first engagement portion is released, and the first pressing member and the second pressing member are in the relative rotation unlocked state. When the first pressing member and the second pressing member are relatively rotated to the filter fixing release position, the locking piece gets over the stepped portion and is locked to the second locking portion. 2 The pressing member is in a relative rotation locked state. At the filter fixing release position, a gap is formed between the lower surface of the first taper portion and the second taper portion and the upper surface of the filter, and the filter can be replaced using the gap. In this way, the filter replacement operation can be easily performed.

また、本発明のフィルター装置では、前記回転軸は、落下防止用または紛失防止用のチェーンが取り付けられるチェーン取付け部を兼ねている構成を有している。 Further, in the filter device of the present invention, the rotating shaft has a configuration also serving as a chain attachment portion to which a fall prevention chain or a loss prevention chain is attached.

この構成により、回転軸が、押さえ部材を回転させるときの中心軸としての役割だけでなく、チェーン取付け部としての役割を有している。この回転軸にチェーンが取り付けられていることにより、フィルター交換の作業中に部品の落下や紛失を防止することができる。 With this configuration, the rotating shaft has not only a role as a central axis when rotating the pressing member but also a role as a chain attachment portion. By attaching the chain to the rotating shaft, it is possible to prevent parts from being dropped or lost during filter replacement work.

本発明は、フィルター固定位置とフィルター固定解除位置との間で回動可能であり、かつ、回転ロック状態と回転アンロック状態との間で変形可能である押さえ部材を設けることにより、フィルター交換の作業を容易に行うことができるという効果を有するフィルター装置を提供することができるものである。 The present invention provides a pressing member that can be rotated between a filter fixing position and a filter fixing release position, and that can be deformed between a rotation locked state and a rotation unlocked state. It is possible to provide a filter device having an effect that work can be easily performed.

以下、本発明の実施の形態のフィルター装置について、図面を用いて説明する。本実施の形態では、エアコン装置や空気清浄装置などに用いられる防塵用フィルター装置の場合を例示する。 Hereinafter, a filter device according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a case of a dustproof filter device used in an air conditioner device, an air cleaning device, or the like is illustrated.

本発明の実施の形態のフィルター装置の構成を、図１〜図３を用いて説明する。図１は、本実施の形態のフィルター装置の斜視図であり、図２は、フィルター装置の機器本体への取付けの様子を示す説明図である。また、図３は、フィルター装置の分解斜視図である。 The configuration of the filter device according to the embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the filter device according to the present embodiment, and FIG. 2 is an explanatory view showing a state of attachment of the filter device to the device main body. FIG. 3 is an exploded perspective view of the filter device.

図１〜図３に示すように、フィルター装置１のケース部材２には、略円形のフィルター３が装着される略円形の凹部４が設けられている。このフィルター３には、一対の切欠き５が設けられており、ケース部材の凹部４には、フィルター３の切欠き５に対応する位置に一対のリブ６が内側に向けて突出して設けられている（図３参照）。フィルター３を凹部４に装着するときに、フィルター３の切欠き５と凹部４のリブ６を嵌め合せることにより、フィルター３の位置決めをすることができる。また、ケース部材２の底面には、複数の通気孔７が設けられている。 As shown in FIGS. 1 to 3, the case member 2 of the filter device 1 is provided with a substantially circular recess 4 in which a substantially circular filter 3 is mounted. The filter 3 is provided with a pair of notches 5, and the recess 4 of the case member is provided with a pair of ribs 6 projecting inward at positions corresponding to the notches 5 of the filter 3. (See FIG. 3). When the filter 3 is mounted in the recess 4, the filter 3 can be positioned by fitting the notch 5 of the filter 3 with the rib 6 of the recess 4. A plurality of air holes 7 are provided on the bottom surface of the case member 2.

ケース部材２には、凹部４に装着されたフィルター３を押さえる二つの押さえ部材（第１押さえ部材８および第２押さえ部材９）が取り付けられている。この場合、第１押さえ部材８と第２押さえ部材９に軸挿通孔１０が設けられており、ケース部材２のリブ６に軸孔１１が設けられている。そして、回転軸部材１２を軸挿通孔１０を通して軸孔１１に差し込むことにより、第１押さえ部材８と第２押さえ部材９がケース部材２に対して回転可能に取り付けられている。 Two pressing members (a first pressing member 8 and a second pressing member 9) that hold the filter 3 mounted in the recess 4 are attached to the case member 2. In this case, the shaft pressing hole 10 is provided in the first pressing member 8 and the second pressing member 9, and the shaft hole 11 is provided in the rib 6 of the case member 2. The first pressing member 8 and the second pressing member 9 are rotatably attached to the case member 2 by inserting the rotating shaft member 12 into the shaft hole 11 through the shaft insertion hole 10.

ケース部材２に取り付けられた押さえ部材（第１押さえ部材８と第２押さえ部材９）は、凹部４に装着されたフィルター３を固定するフィルター固定位置（図７参照）と、フィルター３の固定を解除するフィルター固定解除位置（図８参照）との間で回動可能である。また、この押さえ部材（第１押さえ部材８と第２押さえ部材９）は、ケース部材２に対する回転がロックされる回転ロック状態と、回転のロックが解除される回転アンロック状態との間で変形可能である。 The holding members (the first holding member 8 and the second holding member 9) attached to the case member 2 are provided with a filter fixing position (see FIG. 7) for fixing the filter 3 attached to the recess 4 and fixing the filter 3. It can be rotated between the filter fixing release position (see FIG. 8) to be released. The pressing members (the first pressing member 8 and the second pressing member 9) are deformed between a rotation lock state in which the rotation with respect to the case member 2 is locked and a rotation unlock state in which the rotation lock is released. Is possible.

第１押さえ部材８は、略円形のフィルター３の略半分の周縁部に対応した形状（略半円の円弧形状）を有している。第１押さえ部材８の両端部には、それぞれ上部に突出する一対の係止片１３が設けられている。この係止片１３の先端部には、つまみ部１４が屈曲して形成されている。このつまみ部１４は、後述するように第１押さえ部材８を弾性力に抗して変形させるつまみ操作を行うときに取手の役割を果たす。また、第１押さえ部材８の両端部の下部には、それぞれ第１テーパ部１５が形成されている。 The first pressing member 8 has a shape (substantially semicircular arc shape) corresponding to a substantially half periphery of the substantially circular filter 3. A pair of locking pieces 13 projecting upward are provided at both ends of the first pressing member 8. A knob portion 14 is bent at the distal end portion of the locking piece 13. As will be described later, the knob portion 14 serves as a handle when a knob operation is performed to deform the first pressing member 8 against an elastic force. Moreover, the 1st taper part 15 is formed in the lower part of the both ends of the 1st pressing member 8, respectively.

第２押さえ部材９は、略円形のフィルター３の略残り半分の周縁部に対応した形状（略半円の円弧形状）を有している。第２押さえ部材９の両端部の上部には、第１押さえ部材８の係止片１３が係止可能な二つの係止部（第１係止部１６および第２係止部１７）が設けられており、第１係止部１６と第２係止部１７との間には、段差部１８が設けられている（図７および図８参照）。また、第２押さえ部材９の両端部の下部には、それぞれ第２テーパ部１９が形成されている。 The second pressing member 9 has a shape (substantially semicircular arc shape) corresponding to the substantially half of the peripheral edge of the substantially circular filter 3. Two locking portions (a first locking portion 16 and a second locking portion 17) capable of locking the locking piece 13 of the first pressing member 8 are provided on the upper portions of both end portions of the second pressing member 9. A step 18 is provided between the first locking portion 16 and the second locking portion 17 (see FIGS. 7 and 8). In addition, second tapered portions 19 are formed at the lower portions of both end portions of the second pressing member 9.

回転軸部材１２は、中央部が屈曲した棒状の形状を有している。この回転軸部材１２には、落下防止用または紛失防止用のチェーン２０が取り付けられている。つまり、この回転軸部材１２は、チェーン取付け部を兼ねているともいえる。このフィルター装置１は、エアコン装置や空気清浄装置などの機器本体２１に着脱可能に取り付けられている（図２参照）。落下防止用または紛失防止用のチェーン２０は、この機器本体２１に接続されている。 The rotating shaft member 12 has a rod-like shape with a bent central portion. A chain 20 for preventing fall or for preventing loss is attached to the rotary shaft member 12. That is, it can be said that the rotating shaft member 12 also serves as a chain attachment portion. The filter device 1 is detachably attached to a device main body 21 such as an air conditioner device or an air cleaning device (see FIG. 2). The drop prevention or loss prevention chain 20 is connected to the device main body 21.

以上のように構成されたフィルター装置１について、図４〜図８を用いてその動作を説明する。ここでは、本発明の特徴であるフィルター交換時の動作を中心に説明する。 About the filter apparatus 1 comprised as mentioned above, the operation | movement is demonstrated using FIGS. Here, the operation at the time of filter replacement, which is a feature of the present invention, will be mainly described.

本実施の形態のフィルター装置１においてフィルター交換作業を行うときには、まず、エアコン装置や空気清浄装置などの機器本体２１からフィルター装置１を取り外す。そして、図４において矢印で示すように、第１押さえ部材８のつまみ部１４を両側からつまんで、第１押さえ部材８を弾性力に抗して変形させる（内側に向けて撓ませる）つまみ操作を行う。このつまみ操作は、作業者が片手で行うことができる。 When the filter replacement operation is performed in the filter device 1 of the present embodiment, first, the filter device 1 is removed from the device main body 21 such as an air conditioner device or an air cleaning device. Then, as indicated by an arrow in FIG. 4, a knob operation for pinching the knob portion 14 of the first pressing member 8 from both sides to deform the first pressing member 8 against the elastic force (bend inward). I do. This knob operation can be performed by an operator with one hand.

機器本体２１からフィルター装置１を取り外した状態では、押さえ部材（第１押さえ部材８と第２押さえ部材９）はフィルター固定位置にある（図７参照）。フィルター固定位置では、第１押さえ部材８と第２押さえ部材９の下面がフィルター３の上面に当接しており、つまみ操作を行っていない状態では、第１押さえ部材８の係止片１３は第２押さえ部材９の第１係止部１６に係止している。 In a state where the filter device 1 is detached from the device main body 21, the pressing members (the first pressing member 8 and the second pressing member 9) are in the filter fixing position (see FIG. 7). In the filter fixing position, the lower surfaces of the first pressing member 8 and the second pressing member 9 are in contact with the upper surface of the filter 3, and when the knob operation is not performed, the locking piece 13 of the first pressing member 8 is The second holding member 9 is locked to the first locking portion 16.

したがって、この状態（フィルター固定位置において、つまみ操作を行っていない状態）では、押さえ部材（第１押さえ部材８と第２押さえ部材９）のケース部材２に対する回転はロックされている。つまり、押さえ部材（第１押さえ部材８と第２押さえ部材９）は、回転ロック状態となっている。また、このとき、第１押さえ部材８と第２押さえ部材９は互いに相対回転がロックされている。つまり、押さえ部材（第１押さえ部材８と第２押さえ部材９）は、相対回転ロック状態となっている。なお、この場合、第１押さえ部材８のつまみ部１４は、第２押え部材の第１係止部１６を介して、ケース部材２に係止しているともいえる。 Therefore, in this state (the state where the knob operation is not performed at the filter fixing position), the rotation of the pressing members (the first pressing member 8 and the second pressing member 9) with respect to the case member 2 is locked. That is, the pressing members (the first pressing member 8 and the second pressing member 9) are in a rotation locked state. At this time, relative rotation of the first pressing member 8 and the second pressing member 9 is locked. That is, the pressing members (the first pressing member 8 and the second pressing member 9) are in a relative rotation locked state. In this case, it can be said that the knob portion 14 of the first pressing member 8 is locked to the case member 2 via the first locking portion 16 of the second pressing member.

このような状態で、つまみ操作を行うと、図５において破線で示すように第１押さえ部材８は弾性力に抗して内側に移動し、第１押さえ部材８の係止片１３と第２押さえ部材９の第１係止部１６との係止が解除される。その結果、第１押さえ部材８と第２押さえ部材９の相対回転のロックが解除される。つまり、押さえ部材（第１押さえ部材８と第２押さえ部材９）は、相対回転アンロック状態となる。また、このとき、押さえ部材（第１押さえ部材８と第２押さえ部材９）のケース部材２に対する回転のロックが解除される。つまり、押さえ部材（第１押さえ部材８と第２押さえ部材９）は、回転アンロック状態になる。このように、つまみ操作を行うことによって、押さえ部材（第１押さえ部材８と第２押さえ部材９）は、フィルター固定位置からフィルター固定解除位置へ回動可能になる。 When the knob operation is performed in such a state, the first pressing member 8 moves inward against the elastic force as shown by a broken line in FIG. Locking of the pressing member 9 with the first locking portion 16 is released. As a result, the relative rotation lock between the first pressing member 8 and the second pressing member 9 is released. That is, the pressing members (the first pressing member 8 and the second pressing member 9) are in the relative rotation unlocked state. At this time, the rotation lock of the pressing members (the first pressing member 8 and the second pressing member 9) with respect to the case member 2 is released. That is, the pressing members (the first pressing member 8 and the second pressing member 9) are in a rotation unlocked state. Thus, by performing the knob operation, the pressing members (the first pressing member 8 and the second pressing member 9) can be rotated from the filter fixing position to the filter fixing releasing position.

そして、つまみ操作を行った状態で、図６において矢印で示すように、第１押さえ部材８をフィルター固定解除位置まで回動させる。このとき、つまみ操作を行っているので、第１押さえ部材８は内側に撓んだ状態となっており、第１押さえ部材８の係止片１３は第２押さえ部材９の段差部１８を乗り越える。その後、つまみ操作を終了すると、第１押さえ部材８は弾性力によって元の形状に復元し、第１押さえ部材８の係止片１３は第２係止部１７に係止する（図８参照）。この第１押さえ部材８の回動操作も、作業者が片手で行うことができる。 And in the state which performed knob operation, as shown by the arrow in FIG. 6, the 1st press member 8 is rotated to a filter fixed release position. At this time, since the knob operation is performed, the first pressing member 8 is bent inward, and the locking piece 13 of the first pressing member 8 gets over the stepped portion 18 of the second pressing member 9. . Thereafter, when the knob operation is finished, the first pressing member 8 is restored to its original shape by the elastic force, and the locking piece 13 of the first pressing member 8 is locked to the second locking portion 17 (see FIG. 8). . The operator can also perform the rotation operation of the first pressing member 8 with one hand.

フィルター固定解除位置では、押さえ部材（第１押さえ部材８と第２押さえ部材９）が、ケース部材２に対して回転アンロック状態になるとともに、互いの相対回転がロックされた相対回転ロック状態となる。また、図８に示すように、フィルター固定解除位置では、第１押さえ部材８の第１テーパ部１５と第２押さえ部材９の第２テーパ部１９の下面とフィルター３の上面との間に隙間が形成される。そして、この隙間を用いてフィルター３の交換が行われる。 At the filter fixing release position, the pressing members (the first pressing member 8 and the second pressing member 9) are in the rotation unlocked state with respect to the case member 2, and the relative rotation locked state in which the relative rotation is locked. Become. Further, as shown in FIG. 8, at the filter fixing release position, there is a gap between the lower surface of the first taper portion 15 of the first pressing member 8 and the second taper portion 19 of the second pressing member 9 and the upper surface of the filter 3. Is formed. Then, the filter 3 is exchanged using this gap.

フィルター３の交換を行った後、これまでと逆の手順を行って、押さえ部材（第１押さえ部材８と第２押さえ部材９）をフィルター固定解除位置からフィルター固定位置へ回動させる。 After replacing the filter 3, the reverse procedure is performed to rotate the pressing members (the first pressing member 8 and the second pressing member 9) from the filter fixing release position to the filter fixing position.

具体的には、フィルター固定解除位置において、つまみ操作を行うことにより、第１押さえ部材８の係止片１３と第２押さえ部材９の第２係止部１７との係止を解除する。そして、つまみ操作を行った状態で、第１押さえ部材８をフィルター固定位置まで回動させる。このときも、つまみ操作を行っているので、第１押さえ部材８の係止片１３は第２押さえ部材９の段差部１８を乗り越える。その後、つまみ操作を終了すると、第１押さえ部材８の係止片１３は第１係止部１６に係止する。このようにして、押さえ部材（第１押さえ部材８と第２押さえ部材９）をフィルター固定にする。この操作も、作業者が片手で行うことができる。 Specifically, by performing a knob operation at the filter fixing release position, the locking between the locking piece 13 of the first pressing member 8 and the second locking portion 17 of the second pressing member 9 is released. Then, in a state where the knob operation is performed, the first pressing member 8 is rotated to the filter fixing position. Also at this time, since the knob operation is performed, the locking piece 13 of the first pressing member 8 gets over the stepped portion 18 of the second pressing member 9. Thereafter, when the knob operation is finished, the locking piece 13 of the first pressing member 8 is locked to the first locking portion 16. In this way, the pressing members (first pressing member 8 and second pressing member 9) are fixed to the filter. This operation can also be performed by the operator with one hand.

そして最後に、このように押さえ部材（第１押さえ部材８と第２押さえ部材９）をフィルター固定位置にしたフィルター装置１を、機器本体２１に取り付ける（図２参照）。 Finally, the filter device 1 having the pressing members (the first pressing member 8 and the second pressing member 9) in the filter fixing position is attached to the device main body 21 (see FIG. 2).

このような本発明の実施の形態のフィルター装置１によれば、フィルター固定位置とフィルター固定解除位置との間で回動可能であり、かつ、回転ロック状態と回転アンロック状態との間で変形可能である押さえ部材（第１押さえ部材８と第２押さえ部材９）を設けることにより、フィルター交換の作業を容易に行うことができる。 According to the filter device 1 of the embodiment of the present invention as described above, the filter device 1 can be rotated between the filter fixing position and the filter fixing release position, and is deformed between the rotation locked state and the rotation unlocked state. By providing the pressing members that can be used (the first pressing member 8 and the second pressing member 9), it is possible to easily replace the filter.

すなわち本実施の形態では、押さえ部材（第１押さえ部材８と第２押さえ部材９）はフィルター固定位置で回転ロック状態となっているので、この押さえ部材（第１押さえ部材８と第２押さえ部材９）によってフィルター３はしっかりと押さえられている。フィルター交換の作業を行うときには、まず、フィルター固定位置で回転ロック状態となっている押さえ部材（第１押さえ部材８と第２押さえ部材９）を回転アンロック状態にし、フィルター固定位置からフィルター固定解除位置まで回動させる。押さえ部材（第１押さえ部材８と第２押さえ部材９）をフィルター固定解除位置にした状態で、フィルター３の交換を行い、その後、押さえ部材（第１押さえ部材８と第２押さえ部材９）をフィルター固定解除位置からフィルター固定位置まで回動させると、押さえ部材（第１押さえ部材８と第２押さえ部材９）は回転ロック状態となる。このようにして、フィルター交換の作業を容易に行うことができる。したがって、フィルター交換の作業を片手でも容易に行うことができ、高所におけるフィルター交換作業の安全性が向上する。 That is, in this embodiment, since the pressing members (the first pressing member 8 and the second pressing member 9) are rotationally locked at the filter fixing position, the pressing members (the first pressing member 8 and the second pressing member). The filter 3 is firmly pressed by 9). When performing the filter replacement work, first, the holding members (the first holding member 8 and the second holding member 9) that are in the rotation locked state at the filter fixing position are set in the rotation unlocked state, and the filter fixing is released from the filter fixing position. Rotate to position. The filter 3 is replaced in a state where the pressing members (the first pressing member 8 and the second pressing member 9) are in the filter fixing release position, and then the pressing members (the first pressing member 8 and the second pressing member 9) are moved. When the filter is released from the filter fixing release position to the filter fixing position, the pressing members (the first pressing member 8 and the second pressing member 9) are in a rotation locked state. In this way, the filter replacement operation can be easily performed. Therefore, the filter replacement work can be easily performed with one hand, and the safety of the filter replacement work at a high place is improved.

具体的には、フィルター交換の作業を行うときには、まず、フィルター固定位置でつまみ操作を行って、つまみ部１４（係止片１３）の係止を解除し、押さえ部材（第１押さえ部材８と第２押さえ部材９）を回転アンロック状態にする。そして、押さえ部材（第１押さえ部材８と第２押さえ部材９）をフィルター固定位置からフィルター固定解除位置まで回動させて、フィルター３の交換を行い、その後、押さえ部材（第１押さえ部材８と第２押さえ部材９）をフィルター固定解除位置からフィルター固定位置まで回動させる。このとき、フィルター固定位置でつまみ操作を行っていなければ、押さえ部材（第１押さえ部材８と第２押さえ部材９）は回転ロック状態となる。このようにして、フィルター交換の作業を容易に行うことができる。 Specifically, when the filter replacement operation is performed, first, a knob operation is performed at the filter fixing position to unlock the knob portion 14 (locking piece 13), and the pressing member (first pressing member 8 and The second pressing member 9) is brought into the rotation unlocked state. Then, the holding members (the first holding member 8 and the second holding member 9) are rotated from the filter fixing position to the filter fixing releasing position to replace the filter 3, and then the holding members (the first holding member 8 and the first holding member 8). The second pressing member 9) is rotated from the filter fixing release position to the filter fixing position. At this time, if the knob operation is not performed at the filter fixing position, the pressing members (the first pressing member 8 and the second pressing member 9) are in the rotation locked state. In this way, the filter replacement operation can be easily performed.

本実施の形態では、第１押さえ部材８と第２押さえ部材９はフィルター固定位置で回転ロック状態かつ相対回転ロック状態となっているので、第１押さえ部材８および第２押さえ部材９によってフィルター３はしっかり押さえられている。フィルター交換の作業を行うときには、まず、フィルター固定位置で回転ロック状態となっている第１押さえ部材８と第２押さえ部材９を回転アンロック状態にすることにより、相対回転ロック状態を相対回転アンロック状態にし、第１押さえ部材８と第２押さえ部材９をフィルター固定位置からフィルター固定解除位置まで相対的に回動させる。フィルター固定解除位置では、第１押さえ部材８と第２押さえ部材９は回転アンロック状態かつ相対回転ロック状態になる。この状態で、フィルター３の交換を行い、その後、第１押さえ部材８と第２押さえ部材９を相対回転アンロック状態にして、フィルター固定解除位置からフィルター固定位置まで回動させ、押さえ部材は回転ロック状態かつ相対回転ロック状態となる。このようにして、フィルター交換の作業を容易に行うことができる。 In the present embodiment, since the first pressing member 8 and the second pressing member 9 are in the rotation locked state and the relative rotation locked state at the filter fixing position, the filter 3 is filtered by the first pressing member 8 and the second pressing member 9. Is firmly held. When performing the filter replacement work, first, the first pressing member 8 and the second pressing member 9 that are in the rotation locked state at the filter fixing position are set in the rotation unlocked state, so that the relative rotation locked state is changed to the relative rotation unlocked state. In the locked state, the first pressing member 8 and the second pressing member 9 are relatively rotated from the filter fixing position to the filter fixing release position. At the filter fixing release position, the first pressing member 8 and the second pressing member 9 are in the rotation unlocked state and the relative rotation locked state. In this state, the filter 3 is replaced, and then the first pressing member 8 and the second pressing member 9 are in the relative rotation unlocked state, rotated from the filter fixing release position to the filter fixing position, and the pressing member rotates. It will be in a locked state and a relative rotation locked state. In this way, the filter replacement operation can be easily performed.

具体的には、フィルター固定位置で第１押さえ部材８と第２押さえ部材９の下面がフィルター３の上面に当接し、かつ、係止片１３が第１係止部１６に係止しているので、第１押さえ部材８および第２押さえ部材９によってフィルター３はしっかり押さえられている。回転ロック状態を回転アンロック状態にすることにより、係止片１３の第１係止部１６への係止が解除され、第１押さえ部材８と第２押さえ部材９が相対回転アンロック状態になる。第１押さえ部材８と第２押さえ部材９をフィルター固定解除位置まで相対的に回動させると、係止片１３が段差部１８を乗り越えて前記第２係止部１７に係止して、第１押さえ部材８と第２押さえ部材９が相対回転ロック状態になる。フィルター固定解除位置では、第１テーパ部１５と第２テーパ部１９の下面とフィルター３の上面との間に隙間が形成されており、その隙間を用いてフィルター３の交換を行うことができる。このようにして、フィルター交換の作業を容易に行うことができる。 Specifically, the lower surfaces of the first pressing member 8 and the second pressing member 9 are in contact with the upper surface of the filter 3 at the filter fixing position, and the locking piece 13 is locked to the first locking portion 16. Therefore, the filter 3 is firmly pressed by the first pressing member 8 and the second pressing member 9. By setting the rotation lock state to the rotation unlock state, the engagement of the engagement piece 13 with the first engagement portion 16 is released, and the first pressing member 8 and the second pressing member 9 are brought into the relative rotation unlocked state. Become. When the first pressing member 8 and the second pressing member 9 are relatively rotated to the filter fixing release position, the locking piece 13 gets over the step portion 18 and is locked to the second locking portion 17, The 1 pressing member 8 and the 2nd pressing member 9 will be in a relative rotation locked state. In the filter fixing release position, a gap is formed between the lower surfaces of the first taper portion 15 and the second taper portion 19 and the upper surface of the filter 3, and the filter 3 can be replaced using the gap. In this way, the filter replacement operation can be easily performed.

さらに本実施の形態では、回転軸部材１２が、押さえ部材（第１押さえ部材８と第２押さえ部材９）を回動させるときの中心軸としての役割だけでなく、チェーン取付け部としての役割を有している。この回転軸にチェーン２０が取り付けられていることにより、フィルター交換の作業中に部品の落下や紛失を防止することができる。 Further, in the present embodiment, the rotating shaft member 12 serves not only as a central axis when rotating the pressing members (the first pressing member 8 and the second pressing member 9) but also as a chain attachment portion. Have. By attaching the chain 20 to the rotating shaft, it is possible to prevent the parts from being dropped or lost during the filter replacement operation.

以上、本発明の実施の形態を例示により説明したが、本発明の範囲はこれらに限定されるものではなく、請求項に記載された範囲内において目的に応じて変更・変形することが可能である。 The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

例えば、以上の説明では、押さえ部材が二つの押さえ部材（第１押さえ部材８と第２押さえ部材９）である場合について説明したが、本発明の範囲はこれに限定されるものではなく、押さえ部材は一つであってもよい。 For example, in the above description, the case where the pressing member is two pressing members (the first pressing member 8 and the second pressing member 9) has been described, but the scope of the present invention is not limited to this, and the pressing member There may be one member.

以下、図９および図１０を用いて、押さえ部材が一つのフィルター装置２２の例（変形例）について説明する。なお、ここでは、この変形例が、図１〜図８のフィルター装置１と相違する点を中心に説明する。つまり、ここで特に言及しない限り、変形例の構成および動作は、図１〜図８のフィルター装置１と同様である。 Hereinafter, an example (modified example) of the filter device 22 having one pressing member will be described with reference to FIGS. 9 and 10. Here, this modification will be described with a focus on differences from the filter device 1 of FIGS. That is, unless specifically mentioned here, the configuration and operation of the modification are the same as those of the filter device 1 of FIGS.

図９は、フィルター装置の変形例の斜視図であり、図１０は、フィルター装置の変形例の分解斜視図である。図９および図１０に示すように、この変形例のフィルター装置２２には、押さえ部材として、第１押さえ部材８のみが備えられており、第２押さえ部材が備えられていない。その代わりに、ケース部材２の凹部４に、フィルター３が差し込まれるフィルター差込部２３が設けられている。このフィルター差込部２３は、差し込まれたフィルター３を押さえる機能を有しており、第２押さえ部材としての役割を果たしている。また、この変形例では、図１〜図８のフィルター装置１の第２押さえ部９と同様の第１係止部２４と第２係止部２５と段差部２６が、ケース部材２のリブ６に設けられている。これらの第１係止部２４と第２係止部２５と段差部２６は、図１〜図８のフィルター装置１の第２押え部材９の第１係止部１６と第２係止部１７と段差部１８と同様の機能を有している。このような変形例のフィルター装置２２によっても、図１〜図８のフィルター装置１と同様の作用効果が奏される。 FIG. 9 is a perspective view of a modified example of the filter device, and FIG. 10 is an exploded perspective view of the modified example of the filter device. As shown in FIGS. 9 and 10, the filter device 22 of this modified example includes only the first pressing member 8 as the pressing member, and does not include the second pressing member. Instead, a filter insertion portion 23 into which the filter 3 is inserted is provided in the recess 4 of the case member 2. The filter insertion portion 23 has a function of pressing the inserted filter 3 and plays a role as a second pressing member. Moreover, in this modification, the 1st latching | locking part 24, the 2nd latching | locking part 25, and the level | step-difference part 26 similar to the 2nd holding | suppressing part 9 of the filter apparatus 1 of FIGS. Is provided. The first locking portion 24, the second locking portion 25, and the stepped portion 26 are formed by the first locking portion 16 and the second locking portion 17 of the second pressing member 9 of the filter device 1 of FIGS. And has the same function as the step 18. Also by the filter device 22 of such a modification, the effect similar to the filter device 1 of FIGS. 1-8 is show | played.

以上のように、本発明にかかるフィルター装置は、フィルター交換の作業を容易に行うことができるという効果を有し、エアコン装置や空気清浄装置などに用いられる防塵用フィルター装置等として有用である。 As described above, the filter device according to the present invention has an effect that filter replacement work can be easily performed, and is useful as a dust-proof filter device used in an air conditioner device, an air cleaning device, or the like.

本実施の形態におけるフィルター装置の斜視図The perspective view of the filter apparatus in this Embodiment フィルター装置の機器本体への取付けの様子を示す説明図Explanatory drawing showing how the filter device is mounted on the device body フィルター装置の分解斜視図Exploded perspective view of filter device フィルター交換の動作（つまみ操作）を説明するための斜視図Perspective view for explaining filter replacement operation (knob operation) フィルター交換の動作（つまみ操作）を説明するための側面図Side view for explaining the filter replacement operation (knob operation) フィルター交換の動作（第１押さえ部材の回動）を説明するための斜視図The perspective view for demonstrating operation | movement (rotation of a 1st pressing member) of filter replacement | exchange フィルター固定位置の説明をするための側面図Side view for explaining the filter fixing position フィルター固定解除位置の説明をするための側面図Side view for explaining the filter fixing release position フィルター装置の変形例の斜視図A perspective view of a modification of the filter device フィルター装置の変形例の分解斜視図Exploded perspective view of a modification of the filter device

Explanation of symbols

１フィルター装置
２ケース部材
３フィルター
６リブ
８第１押さえ部材
９第２押さえ部材
１０軸挿通孔
１１軸孔
１２回転軸部材
１３係止片
１４つまみ部
１５第１テーパ部
１６第１係止部
１７第２係止部
１８段差部
１９第２テーパ部
２０チェーン
２１機器本体
２２フィルター装置
２３フィルター差込部
２４第１係止部
２５第２係止部
２６段差部 DESCRIPTION OF SYMBOLS 1 Filter apparatus 2 Case member 3 Filter 6 Rib 8 1st pressing member 9 2nd pressing member 10 Shaft insertion hole 11 Shaft hole 12 Rotating shaft member 13 Locking piece 14 Knob part 15 1st taper part 16 1st locking part 17 Second locking portion 18 Step portion 19 Second taper portion 20 Chain 21 Device body 22 Filter device 23 Filter insertion portion 24 First locking portion 25 Second locking portion 26 Step portion

Claims

A case member to which the filter is detachably mounted;
A holding member that is attached to the case member so as to be rotatable about a rotation axis, and that holds the mounted filter,
In the filter device with
The pressing member is rotatable between a filter fixing position for fixing the mounted filter and a filter fixing releasing position for releasing the fixing of the filter, and the rotation with respect to the case member being locked. Deformable between a locked state and a rotation unlocked state where the rotation lock is released,
At the filter fixing position, the pressing member is in the rotation locked state, and the pressing member can be rotated from the filter fixing position to the filter fixing releasing position by setting the rotation locking state to the rotation unlocking state. A filter device characterized by comprising:

The pressing member has a bent shape corresponding to the shape of the filter, and a knob portion for performing a knob operation for deforming the pressing member against an elastic force protrudes from both ends of the pressing member. Provided,
In a state where the knob operation is not performed at the filter fixing position, the knob portion is locked to the case member, and the pressing member is in the rotation locked state,
2. The filter device according to claim 1, wherein when the knob operation is performed at the filter fixing position, the knob portion is unlocked and the pressing member is in the rotation unlocked state. .

The pressing member includes a first pressing member that presses the peripheral edge of at least half of the filter, and a second pressing member that presses the peripheral edge of the remaining half of the filter,
The first pressing member and the second pressing member are
In the filter fixing position, the rotation relative to the case member and the relative rotation locked state in which the relative rotation is locked.
By setting the rotation locked state to the rotation unlocked state, the relative rotation unlocked state in which the relative rotation is unlocked can be rotated from the filter fixing position to the filter fixing releasing position. ,
3. The relative rotation lock state in which the rotation is unlocked with respect to the case member and the relative rotation of the case member is locked at the filter fixing release position. Filter device.

The first pressing member has a bent shape corresponding to the peripheral edge of at least half of the filter, and includes a locking piece protruding from the upper part of both ends, and a first tapered part formed at the lower part of both ends. Prepared,
The second pressing member has a bent shape corresponding to the peripheral edge of the remaining half of the filter, and a step between the first locking portion provided at the upper part of both end portions and the first locking portion. A second locking part provided via the part, and a second taper part formed at the lower part of both ends,
The first pressing member and the second pressing member are
In the filter fixing position, the lower surfaces of the first pressing member and the second pressing member come into contact with the upper surface of the filter to be in the rotation locked state, and the locking piece is locked to the first locking portion. And the relative rotation lock state,
By making the rotation lock state into the rotation unlock state, the engagement of the engagement piece to the first engagement portion is released, and the relative rotation lock state becomes the relative rotation unlock state,
When the filter is rotated from the filter fixing position to the filter fixing release position, the locking piece gets over the stepped portion and locks to the second locking portion, and the relative unlocked state is the relative rotation. Become locked,
4. The filter device according to claim 3, wherein a gap is formed between a lower surface of the first taper portion and the second taper portion and an upper surface of the filter at the filter fixing release position.

The filter device according to any one of claims 1 to 4, wherein the rotating shaft also serves as a chain attaching portion to which a chain for preventing fall or for preventing loss is attached.