JP2004272389A

JP2004272389A - Tool for mounting and removing sensor

Info

Publication number: JP2004272389A
Application number: JP2003059100A
Authority: JP
Inventors: Koji Sakamoto; 浩司阪本; Shoichi Oka; 昭一岡
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2003-03-05
Filing date: 2003-03-05
Publication date: 2004-09-30
Anticipated expiration: 2023-03-05
Also published as: JP4066854B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for mounting and removing a sensor which mounts and removes the main bodies of plural kinds of sensors having bottom plates of different external diameters, engages easily with the sensors, generates sufficient transmission torque when the mounting and removing work is done, and hardly falls during the work. <P>SOLUTION: The tool for mounting and removing a sensor is provided with an elastic body having an aperture part at the tip of its pole body, and the bottom plate provided at the lower end of the main body of the sensor firmly mounted on a ceiling via a base part is inserted into the aperture part to mount and remove the main body of the sensor. In this case, a plurality of hitching steps hitching on the bottom plate are provided on the inner circumference of the aperture part, and the hitching steps are provided with hitching steps hitching on the bottom plate having a larger diameter on the front side against the insertion direction to the aperture part, and projecting pressing parts pressing the outer peripheral end surface of the bottom plate are provided at a position opposite to the side face of each of the hitching steps, and projecting engagement parts which engage with the outer circumference side of the bottom plate are provided on the side faces of the hitching steps between the pressing parts, and the outer peripheral end surface of the bottom plate is sandwiched by the pressing parts. Thus, the main body of the sensor is mounted and removed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、天井に固着する感知器本体の取り付け・取り外しを行うための感知器着脱工具に関するものである。
【０００２】
【従来の技術】
天井に取り付けられて熱や煙等をセンシングする感知器に関して、この感知器の外部カバーや感知器本体を着脱する感知器着脱工具の構造は、実開平３−０３０１９５号公報や特開平８−３３９４８６号公報に開示されている。これらの感知器着脱工具は、棒体の先端にゴム又は軟質樹脂製で開口部を有する支持体が取り付けられている構造をしている。作業者は、感知器の下部に立って棒体を握り、感知器本体に支持部の開口部を嵌入し、棒体を回動することで、感知器本体又は外部カバーの着脱を行うものである。
【０００３】
実開平３−０３０１９５号公報に開示されている感知器用の外部カバー着脱工具を図９に示す。図９（ａ）は感知器の側面図で、図９（ｂ）は外部カバー着脱工具の斜視図である。この外部カバー着脱工具は、支持部１２の開口部１３の内周面に弧状係合爪６１と係合用の係合溝６２を有している。このものは、係合溝溝６２が感知器着用カバーの縦枠材（リブ）３４に嵌合することで、棒体の回動のトルクを伝達している。また、弧状係合爪６１が底面板（鍔部）３３を嵌合係止することで、この外部カバー着脱工具の落下防止の機能を果たしている。また、この外部カバー着脱工具の開口部１３には、複数の係合段が形成されているので、複数の種類の外部カバーに対応することができるようになっている。
【０００４】
また、特開平８−３３９４８６号公報に開示されている感知器着脱工具の構造を図１０に示す。図１０（ａ）は感知器のベース部、感知器本体、感知器着脱工具の側面図で、図１０（ｂ）は感知器本体のＸ−Ｘ面の断面図で、図１０（ｃ）は感知器着脱工具のＹ−Ｙ面の断面図である。このものは、感知器本体３２及び感知器着脱工具の開口部１３を非円形としたものである。開口部１３を、感知器本体３２に嵌入させて棒体１１を回動させれば、空回りすることなく、トルクが伝達して、感知器本体３２をベース部３１に着脱させることができる。
【０００５】
【特許文献１】
実開平３−０３０１９５号公報（第６−９頁、図７、８）
【０００６】
【特許文献２】
特開平８−３３９４８６号公報（第４−５頁、図１）
【０００７】
【発明が解決しようとする課題】
前述の図９に示した感知器用の外部カバー着脱工具では、確実に落下防止させるために、弧状係合爪６１の形状を大きくすると、底面板３３を嵌合係止させるときの抵抗が大きくなっていた。逆に、底面板３３を容易に嵌合係止にするために、弧状係合爪６１の形状を小さくすると、作業者が手を離した時に、外部カバー着脱工具のバランスがよくないと、落下するおそれが大きくなっていた。
【０００８】
また、図１０に示した感知器着脱工具では、支持体１２の断面形状が大きい場合には、支持体１２と感知器本体３２との間の摩擦力が弱くなり、棒体を回動しても、空回りするおそれがあった。また、逆に、支持体１２の断面形状が小さい場合には、支持体１２を感知器本体３２に嵌入させるときの抵抗が大きくなっていた。
【０００９】
本発明は、かかる事由に鑑みてなしたもので、その目的とするところは、外径の異なる底面板を有する複数種類の前記感知器本体を着脱することができ、かつ、感知器着との係合が容易で、着脱作業時に十分な伝達トルクを生じることができ、作業時に落下しにくい感知器着脱工具を提供することにある。
【００１０】
【課題を解決するための手段】
請求項１に係る発明の感知器着脱工具は、棒体と、棒体の先端に略円柱形の開口部を有する弾性体の支持体を備え、天井にベース部を介して固着される感知器本体の下端に具備された略円形の底面板を前記開口部に嵌入して回動することにより、感知器本体を着脱する感知器着脱工具において、前記開口部の内周面に前記底面板と係合する複数の係合段を設け、前記係合段は前記開口部の嵌入方向に対して手前側に径が大きい底面板と係合する係合段を設け、各々の係合段の側面の対向位置に前記底面板の外周端面に圧接する圧接部を突設し、前記圧接部の間の前記係合段の側面に前記底面板の外周上側に引っ掛ける係止部を突設し、前記圧接部で前記底面板の外周端面を挟持することにより、前記感知器本体を着脱するものであることを特徴としている。
【００１１】
請求項２に係る発明の感知器着脱工具は、請求項１の構成において、前記支持体の上側周辺部に半径方向に対して溝又は切込みを設けることにより前記上側周辺部を周方向に分割して分割周辺部を形成し、前記分割周辺部の各々の係合段の側面に圧接部又は係止部を設けてなることを特徴としている。
【００１２】
請求項３に係る発明の感知器着脱工具は、請求項２の構成において、前記分割周辺部について各々の係合段の側面には圧接部又は係止部のいずれかのみを設けてなることを特徴としている。
【００１３】
請求項４に係る発明の感知器着脱工具は、請求項３の構成において前記係合段が２段であって、上方係合段の側面に圧接部を設けた分割周辺部の下方係合段の側面には係止部を設けてなり、上方係合段の側面に係止部を設けた分割周辺部の下方係合段の側面には圧接部を設けてなることを特徴としている。
【００１４】
【発明の実施の形態】
本実施の形態に係る感知器着脱工具を、図１〜８に基づいて説明する。図１は本実施形態の感知器着脱工具の斜視図で、図２は、同じ物の上面図で、図３は同じ物の縦断面図で、図４（ａ）、（ｂ）は圧接部及び係止部の縦断面図の拡大図で、図５は外径の小さい前記底面板と係合した状態を示す縦断面図で、図６は外径の大きい前記底面板と係合した状態を示す縦断面図で、図７は本実施形態の感知器本体の取り付け状態を示す斜視図で、図８は本実施の形態の感知器本体の他の取り付け構造部分を示す斜視図である。
【００１５】
感知器着脱工具１は、図１乃至図４に示すように、硬質樹脂又は木製の棒体１１と弾性変形可能なゴム又は軟質樹脂製の支持体１２とからなっている。支持体１２の上部に略円柱形の開口部１３を有し、この開口部１３の内周面には、上方係合段１４の下方係合段１５の２段の係合段が設けられていて、上方係合段１４の側面の直径は、下方係合段１５の側面の直径よりも大きい。また、支持体１２の上側周辺部に半径方向に対して８個の溝１６ａ〜ｈを設けて、上側周辺部を周方向に等分割することで、８個の分割周辺部１７ａ〜ｈを形成している。また、各々の分割周辺部１７ａ〜ｈの上方係合段１４には圧接部２１と係合部２２が、下方係合段１５の側面には圧接部２３と係合部２４が設けられていて、それぞれの係合段１４、１５には、外径の異なる別々の感知器の底面板が嵌入する構造になっている。ここで、各々の係合段１４、１５には、各々の分割周辺部１７ａ〜ｈについて圧接部２１、２３と係止部２２、２４とが交互に隣接するように設けられている。また、図２の上面図に示すように、各々の分割周辺部１７ａ〜ｈについては、上方係合段１４の側面に圧接部２１を設けた分割周辺部１７ａ、ｃ、ｅ、ｇの下方係合段１５の側面には係止部２２が突設され、上方係合段１４の側面に係止部２３を設けた分割周辺部１７ｂ、ｄ、ｆ、ｈの下方係合段１５の側面には圧接部２４が突設されている。例えば、図４（ａ）に示すＣ−Ｏの断面図のように、分割周辺部１７ａの下方係合段１５の側面には、円弧形状の厚さ約２ｍｍの板で、先端側面が平面視で嵌入する底面板の外周端面よりも僅かに内側に配設されるように係止部２４が形成されている。また、上方係合段１４の側面には、嵌入する底面板の外周端面に外接する圧接部２１が形成されている。ここで、係止部２４の上側外縁部は、面取りがなされている。また、図４（ｂ）に示すＤ−Ｏの断面図のように、分割周辺部１７ａに隣接する分割周辺部１７ｂ、１７ｈには、それぞれ、下方係合段１４の側面には圧接部２３が設けられ、上方係合段１４の側面には係止部２２が突設されている。なお、圧接部２３と係止部２２の形状は、圧接部２１と係止部２４と略同じである。
【００１６】
感知器は、図７に示すように、ベース部３１と感知器本体３２とからなっている。ベース部３１は、ビス等により天井５に固定されるものであり、感知器本体３２はベース部３１に固定されている。両者を固定する構成としては、図７に示すように、ベース部３１の外周面に雄螺子４１を形成し、感知器本体３２の上部の内周面に、雌螺子４２を形成して、両者を螺合する構成がある。他の構成としては、図８に示すように、ベース部３１に支持体１１の取り付け時の回転方向に長孔４３と、この長孔４３の一端にこれよりも大きな挿入孔４４とを併せて穿設したものを複数設け、この挿入孔４４に対応する感知器本体３２の場所に係止金具４５を設け、係止金具４５を挿入孔４４に挿入して、回転させることにより、感知器本体３２をベース部３１に取り付ける構成がある。
【００１７】
感知器本体３２の内部には、熱や煙をセンシングするセンサー（図示せず）が組み込まれている。さらに、感知器本体３２には、センサーに外部から塵等が侵入することを防止するための外部カバー３４が取り付けられている。外部カバー３４は、円筒形であり、下端には円形の底面板３３が設けられていて、側面には、底面板に一体成形されて垂直方向に底面板３３を保持する縦枠材３５と、これに接合して水平方向に補強する環状の横枠強材とが設けられている。また、この外部カバー３４の内側には防塵網３６が設けられている。
【００１８】
以下に、感知器本体３２をベース部３１から取り外す作業について説明する。まず、作業者は、感知器着脱工具１の棒体１１を握って、感知器本体３２の下方の床上に立つ。次に、支持体１２の開口部１３が、係合する感知器本体３２の底面板３３を覆うように、感知器着脱工具１を感知器本体３２の直下に配置する。この状態で、作業者が、棒体１１を垂直方向に押し上げる。直径の小さい底面板３３の場合には、図５に示す図２のＥ−Ｏ−Ｆの断面図のように、下方係合段１５の係止部２４が、弾性変形によって底面板３３を乗り越えて、底面板３３上に引っ掛けられた状態となる。また、下方係合段１５の側面の対向位置に形成されている対の圧接部２３の先端側面は、底面板３３の外周端面に接触して、底面板３３を両側から挟持した状態となる。一方、直径の大きい底面板３３の場合には、図６に示す図２のＥ−Ｏ−Ｆの断面図のように、上方係合段１４の係止部２２が、弾性変形によって、底面板３３を乗り越えて、底面板３３上に引っ掛けられた状態となる。また、上方係合段１４の側面の対向位置に突設されている対の圧接部２１の先端側面は、底面板３３の外周端面に接触して、底面板３３を両側から挟持した状態となる。このように支持部１２と感知器本体３２とが係合した状態で、作業者が棒体１１を回動させると、圧接部２１、２３の先端側面と底面板３３の外周端面との摩擦力によって、棒体１１のトルクが伝達して、感知器本体３２も空回りすることなく回動する。ここで、感知器本体３２とベース部３１との係合構造が、図７に示すような雌螺子４１と雄螺子４２との螺合であっても、図８に示すような係止金具４５の挿入孔４４への挿入であっても、感知器本体３２を感知器着脱工具１によって回動させることにより、感知器本体３２は、ベース部３１から取り外される。そして、作業者が、感知器本体３２を手で把持しておいて、作業者が棒体１１を引っ張ることにより、支持部１２と感知器本体３２との係合が外れる。
【００１９】
逆に、感知器本体３２をベース部３１に取り付ける作業は、以下のようになる。あらかじめ、感知器本体３２を支持体１２を径に合う係合段に嵌入させた状態で、作業者は棒体１１を握って、感知器本体３２を天井５に取り付けたベース部３１の直下に配置させる。ここで、感知器本体３２とベース部３１との係合構造が、図７に示すようなものであれば、両螺子を螺合させるように、感知器本体３２を感知器着脱工具１によって回動させる。また、図８に示すようなものであれば、係止金具４５を挿入孔４４に挿入した後に感知器本体３２を回動させる。このようにして、前述した方向と逆方向に回動させることで、感知器本体３２がベース部３１に取り付けられる。そして、作業者が棒体１１を引っ張ることにより、感知器着脱工具１は感知器本体３２から開放される。
【００２０】
ここで、支持部１２の開口部１３の内周面には、上方係合段１４と下方係合段１５の２段の直径の異なる係合段が設けられて、外径の異なる別々の感知器本体が嵌入する構造になっている。このために、１個の感知器着脱工具１によって、外径の異なる２種類の感知器の着脱が可能となっている。
【００２１】
また、各々の分割周辺部１７ａ〜ｈの圧接部２１、２３の先端側面は、底面板３３の外周端面に外接する形状であり、上側外縁部の上部は面取りがなされている。したがって、感知器着脱工具１を押し上げる時の底面板３３の外周端面と圧接部１５による接触摩擦は小さい。また、係止部２２、２４の先端側面は、底面板３３の外周端面よりも僅かに内側になるように形成されている。このため、係止部２２、２４が弾性変形によって、底面板３３を容易に乗り越えて、底面板３３上に引っ掛けられる状態となる。さらに、支持体１２の上側周辺部は、溝１６ａ〜ｈによって分割周辺部１７ａ〜ｈは分割された状態になっている。この分割周辺部１７ａ〜ｈについて各々の係合段１４、１５の側面には圧接部２１、２３または、係止部２２、２４のいずれかのみが設けられている。したがって、支持体１２と感知器本体３２とを係合させるときに、分割周辺部１７ａ〜ｈは、相互の影響をあまり受けることなく、独立して弾性変形することができる。以上の構成により、感知器着脱工具１の支持部１２と感知器本体３２とを小さな抵抗で係合させることができる。逆に、小さい抵抗で両者の係合を外すことができる。
【００２２】
また、支持部１２と感知器本体３２とが係合しているときには、圧接部２１、２３は係合段１４、１５の側面の対向位置から底面板３３を挟持している状態となっているので、支持体１２が回動したときに、両者の間に確実に摩擦力が働き、トルクが伝達される。さらに、支持体１２が回動すると、弾性体である圧接部２１、２３は、底面板３３の外周端面との摩擦力によって変形することで両者の密着性が増加し、さらに摩擦力は増大して、トルクが伝達しやすくなる。
【００２３】
さらに、支持部１２と感知器本体３２とが係合しているときには、作業者が手を離しても、係止部２２、２４が、底面板３３の上面に引っ掛かるので、感知器着脱工具１が落下することはない。特に、４個の係止部２２、２４と圧接部２１、２３とは、交互に隣接する構造となっているので、作業者が手を離した状態でのバランスが良好で落下しにくい。
【００２４】
また、上方係合段１４の側面に圧接部２１を設けた分割周辺部１７の下方係合段１５の側面には係止部２を設けて、上方係合段１４の側面に係止部２２を設けた分割周辺部１７の下方係合段１５の側面には圧接部２３を設けている。つまり、１個の分割周辺部１７にあって、上方係合段１４と下方係合段１５との両段に係止部が存在することはない。このために、支持体１２を金型により製造する場合に、金型の抜き工程が容易になり、生産性が向上する。
【００２５】
なお、各係合段の係止部と圧接部を有する分割周辺部の個数は、本実施形態のように合計で８個でなくてもよい。これらの数が少なくても、多くても、感知器着脱工具を回動することによって、トルクを伝達して感知器本体を着脱できる。また、係止部と圧接部の個数は一致していなくてもかまわない。例えば、突設する係止部の数を圧接部の数よりも多くすれば、発生する伝達トルクは小さくなるが、作業者が手を離したときのバランスが良好で落下しにくい感知器着脱工具を製造できる。また、個々の係合段において、係止部も圧接部も設けられていない分割周辺部が付設されていても、本感知器着脱工具の機能を著しく低下させることはない。さらに、３段以上の係合段を設ければ、段数に合わせた外径を有する多種類の感知器の着脱が可能となる。
【００２６】
【発明の効果】
請求項１に係る発明の感知器着脱工具は、棒体と、棒体の先端に略円柱形の開口部を有する弾性体の支持体を備え、天井にベース部を介して固着される感知器本体の下端に具備された略円形の底面板を前記開口部に嵌入して回動することにより、感知器本体を着脱する感知器着脱工具において、前記開口部の内周面に前記底面板と係合する複数の係合段を設け、前記係合段は前記開口部の嵌入方向に対して手前側に径が大きい底面板と係合する係合段を設け、各々の係合段の側面の対向位置に前記底面板の外周端面に圧接する圧接部を突設し、前記圧接部の間の前記係合段の側面に前記底面板の外周上側に引っ掛ける係止部を突設し、前記圧接部で前記底面板の外周端面を挟持することにより、前記感知器本体を着脱するものであることを特徴としているので、外径の異なる複数の感知器本体を着脱することが可能であり、感知器着脱工具の支持部と感知器本体とを小さな抵抗で係合させることができ、さらに、着脱時に作業者が手を離しても感知器着脱工具が落下しにくくなっている。
【００２７】
請求項２に係る発明の感知器着脱工具は、請求項１の構成において、前記支持体の上側周辺部に半径方向に対して溝又は切込みを設けることにより前記上側周辺部を周方向に分割して分割周辺部を形成し、前記分割周辺部の各々の係合段の側面に圧接部又は係止部を設けてなることを特徴としているので、請求項１記載の効果に加えて、前記開口部を前記感知器本体に嵌入するときに前記分割周辺部が相互の影響をあまり受けることなく、独立して弾性変形することができることになり、感知器着脱工具の支持部と感知器本体とをさらに小さな抵抗で係合させることができる。
【００２８】
請求項３に係る発明の感知器着脱工具は、請求項２の構成において、前記分割周辺部について各々の係合段の側面には圧接部又は係止部のいずれかのみを設けてなることを特徴としているので、請求項２記載の効果に加えて、前記開口部を前記感知器本体に嵌入するときに前記圧設部と係止部とが相互の影響をあまり受けることなく、独立して弾性変形することができることになり、感知器着脱工具の支持部と感知器本体とをさらに小さな抵抗で係合させることができる。
【００２９】
請求項４に係る発明の感知器着脱工具は、請求項３の構成において前記係合段が２段であって、上方係合段の側面に圧接部を設けた分割周辺部の下方係合段の側面には係止部を設けてなり、上方係合段の側面に係止部を設けた分割周辺部の下方係合段の側面には圧接部を設けてなることを特徴としているので、請求項３記載の効果に加えて、支持体を金型により製造する場合に、金型の抜き工程が容易になり、生産性が向上する。
【図面の簡単な説明】
【図１】本実施の形態の感知器着脱工具の斜視図である。
【図２】本実施の形態の感知器着脱工具の上面図である。
【図３】本実施の形態の感知器着脱工具の断面図である。
【図４】本実施の形態の感知器着脱工具の係止部の断面図である。
【図５】本実施の形態の感知器着脱工具が感知器に係合した状態を示す断面図である。
【図６】本実施の形態の他の感知器着脱工具が感知器に係合した状態を示す断面図である。
【図７】本実施の形態の感知器本体の取り付け構造用を示す斜視図である。
【図８】本実施の形態の感知器本体の取り付け構造用の金具を示す斜視図である。
【図９】従来の感知器と感知器着脱工具の側面図である。
【図１０】従来の他の感知器と感知器着脱工具の斜視図である。
【符号の説明】
１感知器着脱工具
１１棒体
１２支持体
１３開口部
１４上方係止段
１５下方係止段
１６ａ〜ｈ溝
１７ａ〜ｈ分割周辺部
２１、２３圧接部
２２、２４係止部
３１ベース部
３２感知器本体
３３底面板
３４外部カバー
３５縦枠材
３６防塵網
５天井[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sensor attachment / detachment tool for attaching / detaching a sensor body fixed to a ceiling.
[0002]
[Prior art]
Regarding a sensor attached to a ceiling for sensing heat, smoke, etc., the structure of a sensor attaching / detaching tool for attaching / detaching an external cover and a sensor main body of the sensor is disclosed in Japanese Utility Model Laid-Open Publication No. 3-030195 and Japanese Unexamined Patent Publication No. Hei 8-339486. No. 5,009,045. These detector attachment / detachment tools have a structure in which a support made of rubber or soft resin and having an opening is attached to the tip of a rod. The operator stands at the lower part of the sensor, grasps the rod, fits the opening of the support into the sensor main body, and rotates the rod to attach or detach the sensor main body or the external cover. is there.
[0003]
FIG. 9 shows an external cover attaching / detaching tool for a sensor disclosed in Japanese Utility Model Laid-Open No. 3-030195. FIG. 9A is a side view of the sensor, and FIG. 9B is a perspective view of an outer cover attaching / detaching tool. The outer cover attaching / detaching tool has an arc-shaped engaging claw 61 and an engaging groove 62 for engagement on the inner peripheral surface of the opening 13 of the support portion 12. In this case, the torque of the rotation of the rod is transmitted by the engagement groove 62 being fitted into the vertical frame member (rib) 34 of the sensor wearing cover. Further, the arc-shaped engaging claw 61 engages and locks the bottom plate (flange) 33, thereby fulfilling the function of preventing the external cover attaching / detaching tool from dropping. Further, since a plurality of engagement steps are formed in the opening 13 of the external cover attaching / detaching tool, it is possible to cope with a plurality of types of external covers.
[0004]
FIG. 10 shows the structure of a sensor attaching / detaching tool disclosed in Japanese Patent Application Laid-Open No. 8-339486. FIG. 10A is a side view of the base portion of the sensor, the sensor main body, and the sensor attaching / detaching tool. FIG. 10B is a cross-sectional view of the sensor main body taken along the line XX, and FIG. It is sectional drawing of the YY surface of a sensor attachment / detachment tool. In this device, the sensor body 32 and the opening 13 of the sensor attaching / detaching tool are non-circular. If the rod 13 is rotated by fitting the opening 13 into the sensor main body 32, torque is transmitted without idling and the sensor main body 32 can be attached to and detached from the base 31.
[0005]
[Patent Document 1]
JP-A-3-030195 (Pages 6-9, FIGS. 7, 8)
[0006]
[Patent Document 2]
JP-A-8-339486 (page 4-5, FIG. 1)
[0007]
[Problems to be solved by the invention]
In the external tool attaching / detaching tool for the sensor shown in FIG. 9 described above, if the shape of the arc-shaped engaging claw 61 is increased to reliably prevent the falling, the resistance when the bottom plate 33 is fitted and locked increases. I was Conversely, if the shape of the arc-shaped engaging claw 61 is reduced in order to easily engage and lock the bottom plate 33, when the operator removes his hand, if the balance of the outer cover attaching / detaching tool is not well-balanced, the fall will occur. There was a greater risk of doing so.
[0008]
In the sensor attachment / detachment tool shown in FIG. 10, when the cross-sectional shape of the support 12 is large, the frictional force between the support 12 and the sensor main body 32 is weakened, and the rod is rotated. Also, there was a risk of idling. Conversely, when the cross-sectional shape of the support 12 is small, the resistance when the support 12 is fitted into the sensor main body 32 is large.
[0009]
The present invention has been made in view of the above circumstances, and an object thereof is to be able to attach and detach a plurality of types of the sensor main bodies having bottom plates having different outer diameters, and to attach to the sensor. It is an object of the present invention to provide a detector attaching / detaching tool which can be easily engaged, can generate a sufficient transmission torque at the time of attaching / detaching work, and is hardly dropped during the operation.
[0010]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a sensor attaching / detaching tool including a rod, an elastic support having a substantially cylindrical opening at a tip of the rod, and a sensor fixed to a ceiling via a base. By inserting and rotating a substantially circular bottom plate provided at the lower end of the main body into the opening and attaching and detaching the sensor main body, the bottom plate is attached to the inner peripheral surface of the opening. A plurality of engaging steps for engaging are provided, and the engaging steps are provided with engaging steps for engaging with a large-diameter bottom plate on a front side with respect to the fitting direction of the opening, and a side surface of each engaging step. At the opposing position, a press contact portion that presses against the outer peripheral end surface of the bottom plate protrudes, and a locking portion that hooks on the outer peripheral upper side of the bottom plate protrudes from a side surface of the engagement step between the press contact portions, The sensor body is attached and detached by clamping the outer peripheral end surface of the bottom plate with the press contact portion. It is set to.
[0011]
According to a second aspect of the present invention, in the configuration of the first aspect, the upper peripheral portion is circumferentially divided by providing a groove or a cut in the upper peripheral portion of the support in the radial direction. And a press-contact portion or a locking portion is provided on a side surface of each engagement step of the split peripheral portion.
[0012]
According to a third aspect of the present invention, in the configuration of the second aspect, only one of a press-contact portion and a locking portion is provided on a side surface of each of the engagement steps with respect to the divided peripheral portion. Features.
[0013]
According to a fourth aspect of the present invention, there is provided the sensor mounting / removing tool according to the third aspect, wherein the number of the engagement stages is two, and the lower engagement stage of the divided peripheral portion provided with a press-contact portion on a side surface of the upper engagement stage. Is characterized in that a locking portion is provided on a side surface of the upper engaging step, and a press contact portion is provided on a side surface of the lower engaging step of the divided peripheral portion where the locking portion is provided on the side surface of the upper engaging step.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
A sensor attachment / detachment tool according to the present embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of a sensor attaching / detaching tool according to the present embodiment, FIG. 2 is a top view of the same object, FIG. 3 is a vertical sectional view of the same object, and FIGS. FIG. 5 is an enlarged view of a vertical cross-sectional view of the locking portion, and FIG. 5 is a vertical cross-sectional view showing a state of engagement with the bottom plate having a small outer diameter, and FIG. 7 is a perspective view showing a mounting state of the sensor main body of the present embodiment, and FIG. 8 is a perspective view showing another mounting structure of the sensor main body of the present embodiment.
[0015]
As shown in FIGS. 1 to 4, the sensor attaching / detaching tool 1 includes a hard resin or wooden rod 11 and a support 12 made of elastically deformable rubber or soft resin. A substantially cylindrical opening 13 is provided in the upper part of the support body 12, and two engagement steps of a lower engagement step 15 of an upper engagement step 14 are provided on an inner peripheral surface of the opening 13. Thus, the diameter of the side surface of the upper engaging step 14 is larger than the diameter of the side surface of the lower engaging step 15. Also, eight grooves 16a to 16h are provided in the upper peripheral portion of the support 12 in the radial direction, and the upper peripheral portion is equally divided in the circumferential direction, thereby forming eight divided peripheral portions 17a to 17h. are doing. The upper engaging step 14 of each of the divided peripheral portions 17a to 17h is provided with a press contact portion 21 and an engaging portion 22 on the upper engaging step 14, and the lower engaging step 15 is provided with a press contact portion 23 and an engaging portion 24 on a side surface thereof. Each of the engaging steps 14 and 15 has a structure in which bottom plates of different sensors having different outer diameters are fitted. Here, in each of the engaging steps 14 and 15, the press contact portions 21, 23 and the engaging portions 22, 24 are provided so as to be alternately adjacent to each other in the divided peripheral portions 17a to 17h. Further, as shown in the top view of FIG. 2, each of the divided peripheral portions 17a to 17h has a lower engagement with the divided peripheral portions 17a, 17c, 17e and 17g in which the press contact portion 21 is provided on the side surface of the upper engagement step 14. A locking portion 22 protrudes from a side surface of the joint 15, and a locking portion 23 is provided on a side surface of the upper engaging stage 14. Has a pressure contact portion 24 protruding therefrom. For example, as shown in the cross-sectional view of C-O shown in FIG. 4A, the side surface of the lower engaging step 15 of the divided peripheral portion 17a is a circular arc-shaped plate having a thickness of about 2 mm, and the front end side surface is viewed in plan. The locking portion 24 is formed so as to be disposed slightly inside from the outer peripheral end surface of the bottom plate to be fitted with. Further, a press contact portion 21 circumscribing the outer peripheral end surface of the bottom plate to be fitted is formed on the side surface of the upper engagement step 14. Here, the upper outer edge of the locking portion 24 is chamfered. Further, as shown in the cross-sectional view of DO in FIG. 4B, the press-contact portions 23 are provided on the side surfaces of the lower engaging step 14 at the divided peripheral portions 17b and 17h adjacent to the divided peripheral portion 17a. The engaging portion 22 is provided on the side surface of the upper engaging step 14 so as to protrude therefrom. The shapes of the press contact portion 23 and the engaging portion 22 are substantially the same as those of the press contact portion 21 and the engaging portion 24.
[0016]
The sensor comprises a base part 31 and a sensor main body 32 as shown in FIG. The base portion 31 is fixed to the ceiling 5 with screws or the like, and the sensor main body 32 is fixed to the base portion 31. As a configuration for fixing the both, as shown in FIG. 7, a male screw 41 is formed on the outer peripheral surface of the base portion 31 and a female screw 42 is formed on the inner peripheral surface of the upper part of the sensor main body 32. Is screwed. As another configuration, as shown in FIG. 8, a long hole 43 in the rotation direction when the support 11 is attached to the base portion 31, and an insertion hole 44 larger than this at one end of the long hole 43. A plurality of perforations are provided, a locking member 45 is provided at a position of the sensor main body 32 corresponding to the insertion hole 44, and the locking metal member 45 is inserted into the insertion hole 44 and rotated, whereby the sensor main body is rotated. There is a configuration in which 32 is attached to the base portion 31.
[0017]
A sensor (not shown) for sensing heat or smoke is incorporated in the sensor main body 32. Further, the sensor main body 32 is provided with an external cover 34 for preventing dust and the like from entering the sensor from the outside. The outer cover 34 has a cylindrical shape, a circular bottom plate 33 is provided at the lower end, and a vertical frame member 35 integrally formed with the bottom plate and holding the bottom plate 33 in the vertical direction on the side surface; An annular horizontal frame strong member joined to this and reinforced in the horizontal direction is provided. A dust screen 36 is provided inside the outer cover 34.
[0018]
Hereinafter, an operation of removing the sensor main body 32 from the base portion 31 will be described. First, the operator grasps the rod 11 of the sensor attaching / detaching tool 1 and stands on the floor below the sensor main body 32. Next, the sensor attaching / detaching tool 1 is disposed immediately below the sensor main body 32 such that the opening 13 of the support 12 covers the bottom plate 33 of the sensor main body 32 to be engaged. In this state, the operator pushes up the rod 11 in the vertical direction. In the case of the bottom plate 33 having a small diameter, as shown in the cross-sectional view taken along the line EOF of FIG. 2, the locking portion 24 of the lower engaging step 15 gets over the bottom plate 33 by elastic deformation. As a result, it is hooked on the bottom plate 33. Further, the front end side surfaces of the pair of press-contact portions 23 formed at opposing positions of the side surfaces of the lower engagement step 15 come into contact with the outer peripheral end surface of the bottom plate 33, so that the bottom plate 33 is sandwiched from both sides. On the other hand, in the case of the bottom plate 33 having a large diameter, as shown in the cross-sectional view taken along the line EOF of FIG. 33, and is hooked on the bottom plate 33. Further, the front end side surfaces of the pair of press contact portions 21 protruding at the opposing positions of the side surfaces of the upper engagement step 14 come into contact with the outer peripheral end surface of the bottom plate 33 to sandwich the bottom plate 33 from both sides. . When the operator rotates the rod 11 in the state in which the support portion 12 and the sensor main body 32 are engaged in this manner, when the operator rotates the rod body 11, the frictional force between the tip side surfaces of the press contact portions 21 and 23 and the outer peripheral end surface of the bottom plate 33. Accordingly, the torque of the rod 11 is transmitted, and the sensor main body 32 also rotates without idling. Here, even if the engagement structure between the sensor main body 32 and the base portion 31 is a screw engagement between the female screw 41 and the male screw 42 as shown in FIG. 7, the locking fitting 45 as shown in FIG. Even when the sensor body 32 is inserted into the insertion hole 44, the sensor body 32 is detached from the base portion 31 by rotating the sensor body 32 with the sensor attaching / detaching tool 1. Then, when the worker holds the sensor main body 32 by hand and the worker pulls the rod 11, the engagement between the support portion 12 and the sensor main body 32 is released.
[0019]
Conversely, the operation of attaching the sensor main body 32 to the base portion 31 is as follows. In a state where the sensor main body 32 is previously fitted in the engagement step that matches the diameter of the support 12, the operator grasps the rod 11 and places the sensor main body 32 directly below the base 31 on which the sensor main body 32 is attached to the ceiling 5. To be placed. Here, if the engagement structure between the sensor main body 32 and the base part 31 is as shown in FIG. 7, the sensor main body 32 is rotated by the sensor attaching / detaching tool 1 so that both screws are screwed together. Move. In addition, in the case of the one shown in FIG. 8, the detector main body 32 is rotated after the locking fitting 45 is inserted into the insertion hole 44. In this manner, the sensor main body 32 is attached to the base portion 31 by rotating in the opposite direction to the above-described direction. Then, when the worker pulls the rod 11, the sensor attaching / detaching tool 1 is released from the sensor main body 32.
[0020]
Here, on the inner peripheral surface of the opening 13 of the support portion 12, two engagement stages having different diameters of an upper engagement stage 14 and a lower engagement stage 15 are provided, and separate sensing stages having different outer diameters are provided. It has a structure in which the container body fits. Therefore, two types of sensors having different outer diameters can be attached and detached by one sensor attaching / detaching tool 1.
[0021]
The tip side surfaces of the press contact portions 21 and 23 of each of the divided peripheral portions 17a to 17h are shaped to circumscribe the outer peripheral end surface of the bottom plate 33, and the upper portion of the upper outer edge is chamfered. Therefore, the contact friction between the outer peripheral end surface of the bottom plate 33 and the press-contact portion 15 when the sensor attaching / detaching tool 1 is pushed up is small. The tip side surfaces of the locking portions 22 and 24 are formed so as to be slightly inside the outer peripheral end surface of the bottom plate 33. For this reason, the engaging portions 22 and 24 easily get over the bottom plate 33 due to elastic deformation, and are in a state of being hooked on the bottom plate 33. Further, the upper peripheral portion of the support 12 is divided into the divided peripheral portions 17a to 17h by the grooves 16a to 16h. With respect to the divided peripheral portions 17a to 17h, only one of the pressure contact portions 21, 23 or the locking portions 22, 24 is provided on the side surface of each of the engagement steps 14, 15. Therefore, when the support body 12 and the sensor main body 32 are engaged with each other, the divided peripheral portions 17a to 17h can be elastically deformed independently without much influence from each other. With the above configuration, the support portion 12 of the sensor attaching / detaching tool 1 and the sensor main body 32 can be engaged with a small resistance. Conversely, both can be disengaged with a small resistance.
[0022]
When the support portion 12 and the sensor main body 32 are engaged with each other, the press contact portions 21 and 23 sandwich the bottom plate 33 from the opposing positions of the side surfaces of the engagement steps 14 and 15. Therefore, when the support 12 rotates, a frictional force acts reliably between the two, and the torque is transmitted. Further, when the support 12 rotates, the press contact portions 21 and 23, which are elastic members, are deformed by the frictional force with the outer peripheral end surface of the bottom plate 33, thereby increasing the adhesion between the two and further increasing the frictional force. As a result, torque can be easily transmitted.
[0023]
Further, when the support portion 12 and the sensor main body 32 are engaged, the locking portions 22 and 24 are hooked on the upper surface of the bottom plate 33 even if the operator releases his / her hand. Will not fall. In particular, since the four locking portions 22 and 24 and the press contact portions 21 and 23 are alternately adjacent to each other, the balance in a state where the operator has released his hand is good, and it is difficult to drop.
[0024]
Further, the locking portion 2 is provided on the side surface of the lower engaging step 15 of the divided peripheral portion 17 in which the press contact portion 21 is provided on the side surface of the upper engaging step 14, and the locking portion 22 is provided on the side surface of the upper engaging step 14. A press contact portion 23 is provided on the side surface of the lower engaging step 15 of the divided peripheral portion 17 provided with the pressure contact portion 23. That is, there is no locking portion in both the upper engaging step 14 and the lower engaging step 15 in one divided peripheral portion 17. For this reason, when the support 12 is manufactured using a mold, the step of removing the mold is facilitated, and the productivity is improved.
[0025]
Note that the number of divided peripheral portions having the locking portions and the pressure contact portions of the respective engagement steps may not be eight in total as in the present embodiment. Even if these numbers are small or large, the sensor body can be attached and detached by transmitting torque by rotating the sensor attaching and detaching tool. Further, the number of the locking portions and the number of the press contact portions may not be the same. For example, if the number of projecting locking parts is larger than the number of pressure contact parts, the generated transmission torque will be small, but the balance when the operator releases his hand is good and the sensor attachment / detachment tool is difficult to drop. Can be manufactured. In addition, even if each of the engagement stages is provided with a divided peripheral portion provided with neither a locking portion nor a press-contact portion, the function of the sensor attaching / detaching tool is not significantly reduced. Further, if three or more engagement stages are provided, it is possible to attach and detach various types of sensors having outer diameters corresponding to the number of stages.
[0026]
【The invention's effect】
According to a first aspect of the present invention, there is provided a sensor attaching / detaching tool including a rod, an elastic support having a substantially cylindrical opening at a tip of the rod, and a sensor fixed to a ceiling via a base. By inserting and rotating a substantially circular bottom plate provided at the lower end of the main body into the opening and attaching and detaching the sensor main body, the bottom plate is attached to the inner peripheral surface of the opening. A plurality of engaging steps for engaging are provided, and the engaging steps are provided with engaging steps for engaging with a large-diameter bottom plate on a front side with respect to the fitting direction of the opening, and a side surface of each engaging step. At the opposing position, a press contact portion that presses against the outer peripheral end surface of the bottom plate protrudes, and a locking portion that hooks on the outer peripheral upper side of the bottom plate protrudes from a side surface of the engagement step between the press contact portions, The sensor body is attached and detached by clamping the outer peripheral end surface of the bottom plate with the press contact portion. Therefore, a plurality of sensor bodies having different outer diameters can be attached and detached, and the support portion of the sensor attachment / detachment tool and the sensor body can be engaged with a small resistance. Even if the user releases his hand, the detector attachment / detachment tool is less likely to fall.
[0027]
According to a second aspect of the present invention, in the configuration of the first aspect, the upper peripheral portion is circumferentially divided by providing a groove or a cut in the upper peripheral portion of the support in the radial direction. 2. The structure according to claim 1, wherein a divided peripheral portion is formed, and a pressure contact portion or a locking portion is provided on a side surface of each engagement step of the divided peripheral portion. When the part is inserted into the sensor body, the divided peripheral parts can be elastically deformed independently without much influence from each other, and the support part of the sensor attaching / detaching tool and the sensor body can be separated. It is possible to engage with a smaller resistance.
[0028]
According to a third aspect of the present invention, in the configuration of the second aspect, only one of a press-contact portion and a locking portion is provided on a side surface of each of the engagement steps with respect to the divided peripheral portion. Since it is a feature, in addition to the effect of claim 2, when the opening is fitted into the sensor main body, the press-fitting portion and the locking portion are not greatly influenced by each other and independently. Since the elastic member can be elastically deformed, the support portion of the sensor attaching / detaching tool and the sensor main body can be engaged with a smaller resistance.
[0029]
According to a fourth aspect of the present invention, there is provided the sensor mounting / removing tool according to the third aspect, wherein the number of the engagement stages is two, and the lower engagement stage of the divided peripheral portion provided with a press-contact portion on a side surface of the upper engagement stage. It is characterized in that a locking portion is provided on the side surface of the upper engaging step, and a pressing contact portion is provided on the side surface of the lower engaging step of the divided peripheral portion where the locking portion is provided on the side surface of the upper engaging step, In addition to the effect of the third aspect, when the support is manufactured by using a mold, the step of removing the mold is facilitated, and the productivity is improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a sensor attachment / detachment tool according to the present embodiment.
FIG. 2 is a top view of the sensor attachment / detachment tool according to the embodiment.
FIG. 3 is a cross-sectional view of the sensor attaching / detaching tool according to the present embodiment.
FIG. 4 is a cross-sectional view of a locking portion of the sensor attaching / detaching tool according to the present embodiment.
FIG. 5 is a cross-sectional view showing a state in which the sensor attaching / detaching tool of the present embodiment is engaged with the sensor.
FIG. 6 is a cross-sectional view showing a state where another sensor attaching / detaching tool of the present embodiment is engaged with the sensor.
FIG. 7 is a perspective view showing a mounting structure of the sensor body according to the present embodiment.
FIG. 8 is a perspective view showing a metal fitting for mounting the sensor body of the present embodiment.
FIG. 9 is a side view of a conventional sensor and a sensor attachment / detachment tool.
FIG. 10 is a perspective view of another conventional sensor and a sensor attachment / detachment tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Detector attachment / detachment tool 11 Rod 12 Support 13 Opening 14 Upper locking step 15 Lower locking step 16a-h Groove 17a-h Dividing peripheral parts 21, 23 Pressure contact parts 22, 24 Lock part 31 Base part 32 Sensing Main body 33 Bottom plate 34 External cover 35 Vertical frame material 36 Dustproof net 5 Ceiling

Claims

棒体と、棒体の先端に略円柱形の開口部を有する弾性体の支持体を備え、天井にベース部を介して固着される感知器本体の下端に具備された略円形の底面板を前記開口部に嵌入して回動することにより、感知器本体を着脱する感知器着脱工具において、前記開口部の内周面に前記底面板と係合する複数の係合段を設け、前記係合段は前記開口部の嵌入方向に対して手前側に径が大きい底面板と係合する係合段を設け、各々の係合段の側面の対向位置に前記底面板の外周端面に圧接する圧接部を突設し、前記圧接部の間の前記係合段の側面に前記底面板の外周上側に引っ掛ける係止部を突設し、前記圧接部で前記底面板の外周端面を挟持することにより、前記感知器本体を着脱するものであることを特徴とする感知器着脱工具。A rod, an elastic support having a substantially cylindrical opening at the tip of the rod is provided, and a substantially circular bottom plate provided at the lower end of the sensor body fixed to the ceiling via the base is provided. In a sensor attaching / detaching tool for attaching and detaching a sensor main body by being fitted into the opening and rotating, a plurality of engaging steps for engaging with the bottom plate are provided on an inner peripheral surface of the opening. The joint is provided with an engagement step which engages with a large-diameter bottom plate on the front side with respect to the fitting direction of the opening, and is pressed against the outer peripheral end surface of the bottom plate at a position facing the side surface of each engagement step. A press contact portion is protrudingly provided, and a locking portion which hooks on an outer peripheral upper side of the bottom plate is protruded on a side surface of the engagement step between the press contact portions, and the outer peripheral end surface of the bottom plate is sandwiched by the press contact portion. A tool for attaching and detaching the sensor body.

前記支持体の上側周辺部に半径方向に対して溝又は切込みを設けることにより前記上側周辺部を周方向に分割して分割周辺部を形成し、前記分割周辺部の各々の係合段の側面に圧接部又は係止部を設けてなることを特徴とする請求項１記載の感知器着脱工具。By providing grooves or cuts in the upper peripheral portion of the support in the radial direction, the upper peripheral portion is circumferentially divided to form a divided peripheral portion, and a side surface of each engagement step of the divided peripheral portion 2. The tool according to claim 1, further comprising a pressing portion or a locking portion.

前記分割周辺部について各々の係合段の側面には圧接部又は係止部のいずれかのみを設けてなることを特徴とする請求項２記載の感知器着脱工具。3. The tool according to claim 2, wherein only one of a press-contact portion and a locking portion is provided on a side surface of each engagement step in the divided peripheral portion.

前記係合段が２段であって、上方係合段の側面に圧接部を設けた分割周辺部の下方係合段の側面には係止部を設けてなり、上方係合段の側面に係止部を設けた分割周辺部の下方係合段の側面には圧接部を設けてなることを特徴とする請求項３記載の感知器着脱工具。The engaging step is two steps, and a locking portion is provided on the side surface of the lower engaging step of the divided peripheral portion provided with a pressure contact portion on the side surface of the upper engaging step, and 4. The sensor attachment / detachment tool according to claim 3, wherein a pressure contact portion is provided on a side surface of the lower engagement step of the divided peripheral portion provided with the locking portion.