JP2818913B2 - Twist lock mechanism - Google Patents
Twist lock mechanismInfo
- Publication number
- JP2818913B2 JP2818913B2 JP3152369A JP15236991A JP2818913B2 JP 2818913 B2 JP2818913 B2 JP 2818913B2 JP 3152369 A JP3152369 A JP 3152369A JP 15236991 A JP15236991 A JP 15236991A JP 2818913 B2 JP2818913 B2 JP 2818913B2
- Authority
- JP
- Japan
- Prior art keywords
- cover body
- claw
- main body
- cover
- lock mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Details Of Measuring And Other Instruments (AREA)
- Closures For Containers (AREA)
- Casings For Electric Apparatus (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、防犯や自動制御のため
に使用される人体検知器のように、天井や壁面に機器本
体を取付け、その取付後には機器本体よりカバ−体のみ
を取り外して内部機器の調整や保守点検を行うようにさ
れた機器に好適に使用されるツイストロック機構に関す
る。
【０００２】
【従来の技術】この種の機器に使用されている従来のロ
ック機構としては、図７に示したように、カバー体１０
０側の周縁には複数の係止片１０１とロック溝１０２ａ
を形成した１つのロック片１０２を設け、機器本体２０
０側のカバー体嵌合穴２０１の周縁にはカバ−体１００
の係止片１０１を嵌入させる穴部２０２を設け、本体２
００の内部には、嵌合穴２０１より、カバー体１００側
のロック片１０２のロック溝１０２ａと嵌合する係止凸
部３００ａとネジ孔３００ｂを設けたロック部材３００
を差し入れ、本体２００の外側に形成したネジ挿入孔２
０３より、止めネジ４００によって、ロック部材３００
を図８に示したように仮止状態にし、カバー体１００の
係止片１０１を本体２００の穴部２０２に位置合わせし
て本体２００の嵌合穴２０１にカバー体１００を嵌合さ
せてから、止めネジ４００を螺入させて、ロック部材３
００でロック片１０２を固定するようにしてカバー体１
００を本体２００に対して回動操作不能にロックさせる
ようにしたものが存在する。
【０００３】ところが、このようなものでは、壁面や天
井面に機器本体を取付ける場合には、脚立などの上に乗
って作業を行わなければならないため、ネジ締めなどの
作業は非常に困難であった。しかしながら、防犯や自動
制御に用いられる人体検知器などにおいてはカバ−体を
取り外し、いたずらされることは致命的な機能逸失を招
き、信頼性を著しく損なうものであるため、工具がない
と開けられないようにする必要性からやむを得ずネジ固
定によるロック機構を採用しているのが現状であった。
【０００４】
【発明が解決しようとする課題】本発明ではこれらの欠
点をなくすため、ネジ止め作業を要しないツイストロッ
ク機構を採用することによって、機器本体にカバ−体を
簡単に取り付けでき、また取り付けた後には、ドライバ
ーのような簡単な工具がなければ取り外しできないよう
にした、いたずら防止機能を有したツイストロック機構
を提供することを目的としている。
【０００５】
【課題を解決するための手段】上記目的を達成するため
に提案される本発明は、天井や壁面に取り付けられる機
器本体の嵌合穴に、カバ−体を嵌入回動操作させて着脱
可能に取り付けるツイストロック機構であって、上記カ
バ−体の周縁には爪片が設けられており、上記機器本体
には、上記カバー体の爪片と係合する嵌合穴の内周縁に
形成された係合受け部と、上記カバー体の爪片を機器本
体の係合受け部に受け止め係合させるために上記カバー
体を上記嵌合穴に嵌入させたときには、該カバー体の回
動操作を許容する位置まで弾性変形するが、カバー体の
爪片が機器本体の係合受け部に受け止め係合された後に
は、上記カバー体の回動操作を阻止する位置まで弾性復
元する弾性爪と、カバー体の取り外し時には、ドライバ
ーなどの工具を挿入させて、上記カバー体の回動を許容
させる位置まで上記弾性爪を弾性変形させるためのロッ
ク解除操作孔とを設けた構造となっている。
【０００６】
【作用】本発明のツイストロック機構によれば、カバ−
体を機器本体の嵌合穴に嵌合させ、一方向に回動操作す
れば、カバー体に設けた爪片は、機器本体側に設けた弾
性爪を押し退けるように弾性変形させるので、カバー体
が更に回動して、爪片が機器本体側に設けた係合受け部
に受け止め係合される。このようにして、カバー体の爪
片が機器本体の係合受け部に係合された後は、弾性爪が
元の位置まで弾性復帰して、カバー体の回動を阻止する
ので、係合状態に保持される。なお、カバー体の爪片が
機器本体の係合受け部に係合された後は、爪片は係合受
け部の止部によって、取り付け操作時と同一方向への回
動は阻止される。一方、カバー体を機器本体より取り外
しする場合には、機器本体のロック解除操作孔よりドラ
イバーなどの工具を挿入し、弾性爪をカバー体を機器本
体に取り付けするたときと同一の方向に回動させる。す
ると、弾性爪はカバー体の爪片の回動を許容させる位置
まで弾性変形するのでカバー体の爪片と機器本体の係合
受け部との係合は外れて、両者は簡単に取り外しでき
る。
【０００７】
【実施例】以下に、添付図を参照して本発明の一実施例
を説明する。図１は機器本体の平面図、図２（ａ）〜
（ｃ）はツイストロック機構の動作説明図、図３は機器
本体とカバ−体の概略斜視図、図４は機器本体にカバー
体を取り付けた場合の縦断面構造図、図５はカバー体の
機器本体からの取り外し操作を示した部分縦断面図、図
６は本発明の適用された人体検知器を天井面に取り付け
た状態を示した図であり、この例では本発明のツイスト
ロック機構を人体検知器Ａに適用させた例を示してい
る。
【０００８】図１において、人体検知器Ａは、天井や壁
面に取り付けられた機器本体１に形成した嵌合穴１ａに
カバ−体７を嵌入させ回動操作させて取り付けるように
なっている。そして、カバー体７の内部に人体を検知す
る熱線検知器本体６が設置されている。上記カバ−体７
の周縁には、図３に示すようにＲ部８ａを形成した３つ
の爪片８が設けられている。そして、図１に示すよう
に、機器本体１側には、上記カバー体７の爪片８を受け
止めて係合させる係合受け部５が対応して設けられてお
り、又、この各々の係合受け部５の各々は、図２（ａ）
に示すように、一端にはカバー体７側の爪片８を受け入
れるための開口５ａを形成するとともに、他端には爪片
８の回動を阻止するストッパー部５ｂを形成している。
また、機器本体１のいずれかの係合受け部５の開口５ａ
に近接した位置には、逃げ孔部４（図１参照）を形成し
て、その逃げ孔部４より本体１の底部より延出させた弾
性爪２の頭部２ａを係合受け部５と同じ程度に突出させ
ており、この弾性爪２の頭部２ａには、カバー体７の爪
片８に形成したＲ面８ａに対応させたＲ面２ｂを形成し
ている。そして、図５に示すように、このような弾性爪
２の外周方向には、ドライバーなどの工具９の先端を挿
入できるロック解除操作孔３を形成して、ドライバーな
どの工具９の先端で弾性爪２をロックを解除させる方向
に弾性変形できるようになっている。
【０００９】このようなツイストロック機構によれば、
図２（ａ）に示したように、カバ−体７を機器本体１の
嵌合穴１ａに嵌合させ一方向に回動操作すれば、カバー
体７に設けた爪片８のＲ部８ａが、図２（ｂ）に示した
ように、機器本体１側に設けた弾性爪２のＲ部２ｂを押
し退けるので、弾性爪２は逃げ孔部４内で弾性変形して
爪片８の通過を許容するので、カバー体７は更に回動し
て、爪片８が機器本体１側に設けた係合受け部５の開口
５ａから内部に入ってストッパー部５ｂで受け止めされ
係合されることになる。そして、このようにして、カバ
ー体７の爪片８が機器本体１側に設けた係合受け部５に
係合された後は、弾性爪２が元の位置まで弾性復帰し
て、図２の（ｃ）に示したように、カバー体７の回動を
阻止する。また、カバー体７の爪片８が機器本体１側の
係合受け部５に係合された後は、爪片８は係合受け部５
のストッパー部５ｂによって、取り付け操作時と同一方
向への回動することが阻止されるので、そのまま係合状
態に保持されることになる。
【００１０】一方、カバー体７を機器本体１より取り外
しする場合には、図５に示すように、機器本体１のロッ
ク解除操作孔３よりドライバーなどの工具９の先端を挿
入して弾性爪２を逃げ孔４内で弾性変形させる。する
と、カバー体７は機器本体１に取り付けたときと反対方
向へ回動することが許容されるので、カバー体７をその
方向に回動させればカバー体７の爪片８と機器本体１の
係合受け部５との係合は外れて、両者は簡単に取り外し
できる。
【００１１】
【発明の効果】本発明のツイストロック機構によれば、
ネジ止め作業を要しないツイストロック機構によって、
高所で作業が困難な所でも楽に機器本体にカバ−体を簡
単に取り付けでき、また取り付けた後には、ドライバー
のような簡単な工具がなければ取り外しできないのでい
たずら防止にも有益なツイストロック機構が提供でき
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a device body on a ceiling or a wall, such as a human body detector used for crime prevention or automatic control, and after mounting the device body. The present invention relates to a twist lock mechanism suitably used for a device in which only a cover body is removed from a device main body and adjustment and maintenance and inspection of internal devices are performed. 2. Description of the Related Art As a conventional locking mechanism used in this type of equipment, as shown in FIG.
A plurality of locking pieces 101 and lock grooves 102a are provided on the periphery on the 0 side.
Is provided, and the device main body 20 is provided.
The cover body 100 is provided on the periphery of the cover body fitting hole 201 on the 0 side.
A hole 202 into which the locking piece 101 of the
A locking member 300 provided with a locking projection 300a and a screw hole 300b that fits into the locking groove 102a of the locking piece 102 on the cover body 100 side through the fitting hole 201 inside the locking member 300.
Into the screw insertion hole 2 formed outside the main body 200.
03, the locking member 300 is
8 is temporarily fixed as shown in FIG. 8, the locking piece 101 of the cover body 100 is aligned with the hole 202 of the main body 200, and the cover body 100 is fitted into the fitting hole 201 of the main body 200. , And the set screw 400 is screwed into the lock member 3.
00 so that the lock piece 102 is fixed.
00 is locked with respect to the main body 200 so as not to rotate. However, in such a case, when the main body of the device is mounted on a wall surface or a ceiling surface, the work must be performed on a stepladder or the like, so that it is very difficult to perform a work such as screw tightening. Was. However, in the case of a human body detector used for crime prevention or automatic control, removing the cover and tampering causes fatal loss of function and significantly impairs reliability. At present, a lock mechanism using a screw is inevitably adopted because of the necessity of eliminating the problem. [0004] In order to eliminate these drawbacks, the present invention employs a twist lock mechanism that does not require a screwing operation, so that the cover body can be easily attached to the equipment body. It is an object of the present invention to provide a twist lock mechanism having a tamper-preventing function that cannot be removed without a simple tool such as a screwdriver after being attached. According to the present invention, which is proposed to achieve the above object, a cover body is fitted into a fitting hole of a device body mounted on a ceiling or a wall and rotated. A twist lock mechanism that is detachably attached, wherein a claw piece is provided on a peripheral edge of the cover body, and the device main body has an inner peripheral edge of a fitting hole that engages with the claw piece of the cover body. When the cover body is fitted into the fitting hole for receiving and engaging the formed engagement receiving portion and the claw piece of the cover body with the engagement receiving portion of the device main body, the cover body rotates. An elastic claw that is elastically deformed to a position where operation is permitted, but is elastically restored to a position where rotation of the cover body is prevented after the claw pieces of the cover body are received and engaged with the engagement receiving portions of the device body. When removing the cover, A lock release operation hole for elastically deforming the elastic claw to a position where any tool is inserted and the cover body is allowed to rotate is provided. According to the twist lock mechanism of the present invention, the cover
When the body is fitted into the fitting hole of the device body and rotated in one direction, the claw pieces provided on the cover body are elastically deformed so as to push away the elastic claws provided on the device body side. Is further rotated, and the claw piece is received and engaged with the engagement receiving portion provided on the device main body side. After the claw pieces of the cover body are engaged with the engagement receiving portions of the device main body in this way, the elastic claws resiliently return to their original positions and prevent rotation of the cover body. Held in state. After the claw pieces of the cover body are engaged with the engagement receiving portions of the device main body, the claw pieces are prevented from rotating in the same direction as during the mounting operation by the stop portions of the engagement receiving portions. On the other hand, when removing the cover from the device body, insert a tool such as a screwdriver through the unlock operation hole of the device body, and rotate the elastic claws in the same direction as when the cover body was attached to the device body. Let it. Then, the elastic claw is elastically deformed to a position where the claw piece of the cover body is allowed to rotate, so that the claw piece of the cover body is disengaged from the engagement receiving portion of the device main body, and both can be easily removed. An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a device main body, and FIGS.
(C) is an explanatory view of the operation of the twist lock mechanism, FIG. 3 is a schematic perspective view of the device main body and the cover body, FIG. 4 is a vertical cross-sectional structure diagram when a cover body is attached to the device main body, and FIG. FIG. 6 is a partial longitudinal sectional view showing an operation of detaching the human body detector from the device main body, and FIG. 6 is a diagram showing a state where a human body detector to which the present invention is applied is mounted on a ceiling surface. In this example, a twist lock mechanism of the present invention is used. The example applied to the human body detector A is shown. In FIG. 1, the human body detector A is configured such that a cover body 7 is fitted into a fitting hole 1a formed in an apparatus main body 1 mounted on a ceiling or a wall, and is rotated to be mounted. And the heat ray detector main body 6 which detects a human body is installed inside the cover body 7. The cover body 7
As shown in FIG. 3, three claw pieces 8 each having an R portion 8a are provided on the periphery thereof. As shown in FIG. 1, an engagement receiving portion 5 for receiving and engaging the claw piece 8 of the cover body 7 is provided on the device main body 1 side. Each of the receiving parts 5 is shown in FIG.
As shown in FIG. 3, an opening 5a for receiving the claw 8 on the cover body 7 side is formed at one end, and a stopper portion 5b for preventing rotation of the claw 8 is formed at the other end.
Also, the opening 5a of any of the engagement receiving portions 5 of the device main body 1
An escape hole 4 (see FIG. 1) is formed at a position close to the main body 1, and the head 2 a of the elastic claw 2 extending from the bottom of the main body 1 through the escape hole 4 is engaged with the engagement receiving portion 5. The elastic claw 2 is formed to have the same degree of protrusion, and the head 2a of the elastic claw 2 is formed with an R surface 2b corresponding to the R surface 8a formed on the claw piece 8 of the cover body 7. As shown in FIG. 5, an unlocking operation hole 3 into which the tip of a tool 9 such as a screwdriver can be inserted is formed in the outer peripheral direction of such an elastic claw 2 so that the tip of the tool 9 such as a screwdriver can be elastically operated. The claw 2 can be elastically deformed in the direction to release the lock. According to such a twist lock mechanism,
As shown in FIG. 2A, when the cover body 7 is fitted into the fitting hole 1a of the device main body 1 and rotated in one direction, the R portion 8a of the claw piece 8 provided on the cover body 7 is operated. However, as shown in FIG. 2B, the elastic claw 2 provided on the device body 1 is pushed away from the R portion 2b, so that the elastic claw 2 is elastically deformed in the escape hole 4 and passes through the claw piece 8. , The cover body 7 is further rotated so that the claw piece 8 enters through the opening 5a of the engagement receiving portion 5 provided on the device main body 1 side, is received by the stopper portion 5b, and is engaged. become. Then, after the claw pieces 8 of the cover body 7 are engaged with the engagement receiving portions 5 provided on the device main body 1 side, the elastic claws 2 elastically return to their original positions, as shown in FIG. (C), the rotation of the cover body 7 is prevented. After the claw 8 of the cover body 7 is engaged with the engagement receiving portion 5 of the device main body 1, the claw 8 is moved to the engagement receiving portion 5.
Is prevented from rotating in the same direction as at the time of the mounting operation, so that the engagement state is maintained. On the other hand, when the cover 7 is to be removed from the equipment main body 1, as shown in FIG. Is elastically deformed in the escape hole 4. Then, since the cover body 7 is allowed to rotate in the direction opposite to the direction in which the cover body 7 is attached to the device body 1, if the cover body 7 is rotated in that direction, the claw 8 of the cover body 7 and the device body 1 Are disengaged from the engagement receiving portion 5, and both can be easily removed. According to the twist lock mechanism of the present invention,
With a twist lock mechanism that does not require screwing work,
Twist lock mechanism that can easily attach the cover body to the equipment body easily even in places where work is difficult at high places, and after installation it can be removed without a simple tool such as a screwdriver, so it is also useful to prevent tampering Can be provided.
【図面の簡単な説明】
【図１】本発明のツイストロック機構を人体検知器Ａに
適用させた例を示している機器本体の平面図である。
【図２】（ａ）〜（ｃ）はツイストロック機構の動作説
明図である。
【図３】機器本体とカバ−体の概略斜視図である。
【図４】機器本体にカバー体を取り付けた場合の縦断面
構造図である。
【図５】カバー体の機器本体からの取り外し操作を示し
た部分縦断面図である。
【図６】本発明の適用された人体検知器を天井面に取り
付けた状態を示した図である。
【図７】従来のロック機構の説明図である。
【図８】その一部の縦断面構造図である。
【符号の説明】
１・・・検知器本体
２・・・弾性爪
３・・・ロック解除操作孔
４・・・逃げ孔部
５・・・係合受け部
６・・・人体を検知する熱線検知器本体
７・・・カバー
８・・・爪片BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an apparatus main body showing an example in which a twist lock mechanism of the present invention is applied to a human body detector A. FIGS. 2A to 2C are explanatory diagrams of the operation of the twist lock mechanism. FIG. 3 is a schematic perspective view of an apparatus main body and a cover body. FIG. 4 is a longitudinal sectional structural view when a cover body is attached to the device main body. FIG. 5 is a partial vertical sectional view showing an operation of removing a cover body from a device main body. FIG. 6 is a diagram showing a state where a human body detector to which the present invention is applied is mounted on a ceiling surface. FIG. 7 is an explanatory view of a conventional lock mechanism. FIG. 8 is a vertical sectional structural view of a part thereof. [Description of Signs] 1 ・ ・ ・ Detector main body 2 ・ ・ ・ Elastic claw 3 ・ ・ ・ Lock release operation hole 4 ・ ・ ・ Escape hole 5 ・ ・ ・ Engagement receiving part 6 ・ ・ ・ Hot wire for detecting human body Detector body 7 Cover 8 Claw piece
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H05K 5/03 B65D 43/02 G12B 9/04──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H05K 5/03 B65D 43/02 G12B 9/04
Claims (1)
−体を嵌入回動操作させて着脱可能に取り付けるツイス
トロック機構であって、上記カバ−体の周縁には爪片が
設けられており、上記機器本体には、上記カバー体の爪
片と係合する嵌合穴の内周縁に形成された係合受け部
と、上記カバー体の爪片を機器本体の係合受け部に受け
止め係合させるために上記カバー体を上記嵌合穴に嵌入
させたときには、該カバー体の回動操作を許容する位置
まで弾性変形するが、カバー体の爪片が機器本体の係合
受け部に受け止め係合された後には、上記カバー体の回
動操作を阻止する位置まで弾性復元する弾性爪と、カバ
ー体の取り外し時には、ドライバーなどの工具を挿入さ
せて、上記カバー体の回動を許容させる位置まで上記弾
性爪を弾性変形させるためのロック解除操作孔とを設け
た構造としたツイストロック機構。(57) [Claims] A twist lock mechanism which is removably attached to a fitting hole of an apparatus body attached to a ceiling or a wall by inserting and rotating a cover body, and the detachable peripheral edge of the cover body. The device body is provided with an engagement receiving portion formed on an inner peripheral edge of a fitting hole that engages with the claw piece of the cover body, and a claw piece of the cover body. When the cover body is fitted into the fitting hole in order to receive and engage with the engagement receiving portion of the main body, the cover body is elastically deformed to a position allowing the rotation operation of the cover body. After being received and engaged by the engagement receiving portion of the device body, an elastic claw that elastically restores to a position where the cover body is prevented from rotating, and a tool such as a screwdriver is inserted when removing the cover body, Up to the position that allows the rotation of the cover Unlocking holes and the provided structure and the twist lock mechanism for the elastic claw is elastically deformed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3152369A JP2818913B2 (en) | 1991-05-28 | 1991-05-28 | Twist lock mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3152369A JP2818913B2 (en) | 1991-05-28 | 1991-05-28 | Twist lock mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04350995A JPH04350995A (en) | 1992-12-04 |
| JP2818913B2 true JP2818913B2 (en) | 1998-10-30 |
Family
ID=15539025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3152369A Expired - Fee Related JP2818913B2 (en) | 1991-05-28 | 1991-05-28 | Twist lock mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2818913B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2877135B2 (en) * | 1997-04-18 | 1999-03-31 | 日本電気株式会社 | Multi-stage electronic component module |
| JP5069718B2 (en) * | 2009-04-24 | 2012-11-07 | パナソニック株式会社 | Electrical equipment |
| JP6089482B2 (en) * | 2012-07-31 | 2017-03-08 | 富士通株式会社 | Case and electronic device provided with case |
| JP6374167B2 (en) * | 2014-01-22 | 2018-08-15 | サクサ株式会社 | Reporting device |
-
1991
- 1991-05-28 JP JP3152369A patent/JP2818913B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04350995A (en) | 1992-12-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980630 |
|
| LAPS | Cancellation because of no payment of annual fees |