JPH0725438Y2 - Shutter fall prevention device - Google Patents

Shutter fall prevention device

Info

Publication number
JPH0725438Y2
JPH0725438Y2 JP1989031763U JP3176389U JPH0725438Y2 JP H0725438 Y2 JPH0725438 Y2 JP H0725438Y2 JP 1989031763 U JP1989031763 U JP 1989031763U JP 3176389 U JP3176389 U JP 3176389U JP H0725438 Y2 JPH0725438 Y2 JP H0725438Y2
Authority
JP
Japan
Prior art keywords
shutter
tool
claw
winding shaft
cam plate
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 - Lifetime
Application number
JP1989031763U
Other languages
Japanese (ja)
Other versions
JPH02123598U (en
Inventor
彰 前場
富彦 橋本
Original Assignee
新生精機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 新生精機株式会社 filed Critical 新生精機株式会社
Priority to JP1989031763U priority Critical patent/JPH0725438Y2/en
Priority to KR2019890012043U priority patent/KR920005995Y1/en
Publication of JPH02123598U publication Critical patent/JPH02123598U/ja
Application granted granted Critical
Publication of JPH0725438Y2 publication Critical patent/JPH0725438Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/84Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B2009/807Brakes preventing fast screen movement

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Description

【考案の詳細な説明】 〔産業上の利用分野〕 本考案は電動、又は手動のシャッター開閉装置におい
て、該シャッター開閉装置の異常時に急激落下を防止す
る装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electric or manual shutter opening / closing device for preventing a sudden drop when the shutter opening / closing device is abnormal.

〔従来の技術とその問題点〕[Conventional technology and its problems]

従来からシャッターの安全装置としては、開閉装置の異
常時等にシャッターをゆっくりとした等速度で降下させ
るガバナー装置等があった。
Conventionally, as a safety device for a shutter, there has been a governor device for lowering the shutter at a slow and constant speed when the opening / closing device is abnormal.

しかしながら、前記ガバナー装置においては、開閉装置
の異常時、例えばローラーチェーンの切断,開閉機のブ
レーキの故障等の際にはシャッターはその場で停止する
ことなく降下するので、シャッター下方部に障害物があ
った場合、該障害物と衝突するという問題点があった。
However, in the governor device, when the opening / closing device is abnormal, for example, when the roller chain is cut or the brake of the opening / closing device is broken, the shutter descends without stopping on the spot. If there is, there is a problem of colliding with the obstacle.

〔目的〕〔Purpose〕

本考案はこのような問題点に鑑みてなされたもので、シ
ャッターの降下時に何らかの異常が発生して、シャッタ
ーが急激に落下しようとする際に該シャッターをその場
で確実に停止させることができるシャッターの急激落下
防止装置を提供するものである。
The present invention has been made in view of such a problem, and when some abnormality occurs during the descent of the shutter and the shutter is about to suddenly fall, the shutter can be reliably stopped on the spot. A shutter sudden drop prevention device is provided.

〔問題点を解決するための手段〕[Means for solving problems]

上記の問題を解決し、その目的を達成する手段として、
本考案では、シャッターの巻取り軸と共に回転するカム
板及び爪車と、常態においては、一方に設けたローラー
がカム板の外周に接触し、巻取り軸が一定の回転速度に
達した際には、他方に形成された爪先が爪車に噛合する
爪具と、巻取り軸に回動自在に嵌められ、爪具が略中央
の支軸を回動自在に支承する方形支持板と、爪具が爪車
に噛合した時に、爪具と反対方向に回動する方形支持板
の回動力を受止、停止させるための受止板とで構成され
ていることを特徴とするシャッターの急激落下防止装置
を開発し、採用した。
As a means to solve the above problems and achieve the purpose,
According to the present invention, the cam plate and the ratchet wheel that rotate together with the winding shaft of the shutter and, in the normal state, when the roller provided on one side makes contact with the outer periphery of the cam plate and the winding shaft reaches a constant rotation speed. Is a claw tool having a toe formed on the other side that meshes with a ratchet wheel, a square support plate that is rotatably fitted to a winding shaft, and the claw tool rotatably supports a substantially central support shaft, and a claw. When the tool is engaged with the ratchet wheel, the shutter suddenly drops, which is composed of a receiving plate for receiving and stopping the turning force of the rectangular support plate that rotates in the opposite direction to the nail tool. Developed and adopted the prevention device.

〔作用〕[Action]

常態においては、カム板(10)の外周に、自重又は発条
によって接触している爪具(16)のローラー(17)は、 何らかの異常が発生して、シャッターが急激に落下
しようとした際、 該シャッターの巻取り軸(3)、カム板(10)及び
爪車(11)も急激に回転速度を増し、 爪具(16)のローラー(17)はカム板(10)のカム
片(10a)頂部付近により強く叩打され、該カム板(1
0)外周より離脱する。
In the normal state, the roller (17) of the claw tool (16), which is in contact with the outer periphery of the cam plate (10) by its own weight or spring, when something abnormal occurs and the shutter is about to fall suddenly, The rotation shaft (3) of the shutter, the cam plate (10) and the ratchet wheel (11) also rapidly increase in rotation speed, and the roller (17) of the nail tool (16) causes the cam piece (10a) of the cam plate (10). ) The cam plate (1
0) Separate from the outer circumference.

爪具(16)は支軸(18)を中心に本実施例において
(以下同様とする)右方向に回動し、該爪具(16)の他
方端部に形成されている爪先(16a)が爪車(11)に噛
合する。
The claw tool (16) rotates to the right in the present embodiment (the same applies hereinafter) about the support shaft (18), and the claw tip (16a) formed at the other end of the claw tool (16). Meshes with the ratchet wheel (11).

爪車(11)の回転は、爪具(16)によって停止させ
られるものであるが、この際爪具(16)の支軸(18)で
この回転力を受止する。
The rotation of the ratchet wheel (11) is stopped by the claw tool (16). At this time, the support shaft (18) of the claw tool (16) receives this rotational force.

しかるに、爪具(16)の支軸(18)は方形状支持板
(13)の中心回動軸(11a)から所定間隔を存した外側
部に支承されているため方形状支持板(13)は該中心回
動軸(11a)を中心に、同方向つまり図において左方向
に回動する。
However, since the support shaft (18) of the claw tool (16) is supported on the outer side portion spaced from the central rotation shaft (11a) of the rectangular support plate (13) by a predetermined distance, the rectangular support plate (13) is supported. Rotates about the central rotation shaft (11a) in the same direction, that is, to the left in the figure.

方形状支持板(13)の外周辺部が、該辺部から数ミ
リメートルの間隙を存して設置されている受止板(20)
に当接して、その回動が阻止され、巻取り軸(3)の回
転が停止させられるものである。
The receiving plate (20) in which the outer peripheral part of the rectangular support plate (13) is installed with a gap of several millimeters from the side part.
The rotation of the take-up shaft (3) is stopped by the contact with the rotary shaft.

〔実施例〕〔Example〕

本発明の実施例を図面にもとずいて説明すると第1図に
おいて(1)は電動シャッターを示すもので、(2)は
シャッターの巻取りドラム、(3)は巻取り軸である。
(4)はブラケット(5)に一体的に形成された軸受
で、巻取り軸(3)を回転自在に支承している。(6)
はモーターで巻取り軸(3)の一端部に設けられたスプ
ロケット(7)にローラーチェーン(8)を介して巻取
り軸(3)に回転を伝えるものである。
An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, (1) shows an electric shutter, (2) is a shutter winding drum, and (3) is a winding shaft.
Reference numeral (4) is a bearing formed integrally with the bracket (5) and rotatably supports the winding shaft (3). (6)
Is a motor for transmitting rotation to the sprocket (7) provided at one end of the winding shaft (3) through the roller chain (8) to the winding shaft (3).

(9)は本発明の急激落下防止装置である。この装置
(9)を第2,3図において説明すると、(10)はカム
板、(11)は爪車で、これらを相対向させて一体化し、
巻取り軸(3)の一端部にキー(12)により一体的に固
着してある。
(9) is a sudden drop prevention device of the present invention. This device (9) will be explained with reference to Figs. 2 and 3, (10) is a cam plate, (11) is a ratchet wheel, and these are made to face each other and integrated,
The winding shaft (3) is integrally fixed to one end of the winding shaft (3) by a key (12).

このカム板(10)は、爪車(11)より僅かだけで大径に
形成されてあり、カム板(10)及び爪車(11)の各々の
外周には等間隔毎に12ケのカム片(10a)(10a)…と12
ケの爪(11b)(11b)…を設けてある。
The cam plate (10) has a diameter slightly larger than that of the ratchet wheel (11), and 12 cams are arranged at equal intervals on the outer circumference of each of the cam plate (10) and the ratchet wheel (11). Piece (10a) (10a)… and 12
There are claws (11b) (11b) ...

(13)(13)は巻取り軸(3)に回動自在に嵌められた
同形状の四辺形に形成された二枚の方形状支持板で、カ
ム板(10)と爪車(11)の両側面から挟持するるように
立設してあり、その中央部に穿設された軸孔に前記爪車
(11)のボス部(11a)を回転自在に挿通し、ボルト(1
4)(14)…、ナット(15)(15)…によって四隅を固
定、一体化してある。
Reference numerals (13) and (13) denote two quadrilateral support plates that are rotatably fitted on the winding shaft (3) and are formed in a quadrilateral of the same shape. The cam plate (10) and the ratchet wheel (11). The boss (11a) of the ratchet wheel (11) is rotatably inserted into a shaft hole formed in the center of the bolt (1
The four corners are fixed and integrated by 4) (14) ..., Nuts (15) (15).

なお、この方形状支持板(13)(13)は別に四辺形にこ
だわることなく他の多角形状であってもよい。
The rectangular support plates (13) (13) may have another polygonal shape without being limited to the quadrangle.

(16)はくの字状に折曲している爪具で、その一方端部
に先細の爪先(16a)を形成してあり、他方端部には、
ローラー(17)を回転自在に軸支(17a)してある。
(16) A nail tool that is bent in the shape of a dogleg, with a tapered toe (16a) formed at one end and the other end at the other end.
A roller (17) is rotatably supported by a shaft (17a).

この爪具(16)をローラー(17)部が上方に位置するよ
うにして、前記二枚の方形状支持板(13)(13)間に挿
入し、爪具(16)のローラー(17)をカム板(10)の外
周に当接すると共に、他方端部の爪先(16a)を爪車(1
1)の外周よりわずかの間隔を存したところに対応させ
てある。そして、爪具(16)の重心からやや外側部(図
においてやや右側部)に貫設された軸孔(16b)に、前
記方形状支持板(13)(13)間に設けた支軸(18)を回
動自在に枢着してある。
The nail tool (16) is inserted between the two rectangular support plates (13) (13) so that the roller (17) part is located above, and the roller (17) of the nail tool (16) is inserted. Abutting against the outer periphery of the cam plate (10), and the tip of the toe (16a) at the other end of the cam wheel (1).
It corresponds to the place where there is a slight distance from the outer circumference of 1). Then, in a shaft hole (16b) penetrating from the center of gravity of the claw tool (16) to a slightly outer side portion (a little right side portion in the drawing), a support shaft (provided between the rectangular support plates (13) and (13) ( 18) is pivotally attached.

しかして、この状態においては、爪具(16)はその支軸
(18)が重心からやや外側にはずれているため、第2図
において、この支軸(18)を中心に自重による左方向の
回転モーメントが生じ、爪具(16)のローラー(17)は
カム板(10)の外周に軽く接触しているものである。
In this state, however, since the support shaft (18) of the claw tool (16) is slightly displaced from the center of gravity, the claw device (16) is moved to the left due to its own weight around the support shaft (18) in FIG. A rotation moment is generated, and the roller (17) of the claw tool (16) is in light contact with the outer periphery of the cam plate (10).

又、第2,4図に示すように、爪具(16)のローラー(1
7)基端部から細長杆(16c)を延設して、該細長杆(16
c)の一端部と方形状支持板(13)の所定位置間に発条
(19)を張設して、カム板(10)の外周に対するローラ
ー(17)の接触圧を調整するようにしてもよい。
Also, as shown in FIGS. 2 and 4, the roller (1
7) Extending the elongated rod (16c) from the base end,
A spring (19) may be stretched between one end of (c) and a predetermined position of the rectangular support plate (13) to adjust the contact pressure of the roller (17) with respect to the outer periphery of the cam plate (10). Good.

(20)は、方形状支持板(13)(13)の一辺部が当接し
て停止するための受止板で、該方形状支持板(13)(1
3)の一辺部から数ミリメートルの小間隙を存して、平
行に立設してある。
Reference numeral (20) is a receiving plate for stopping by contacting one side of the rectangular support plates (13) (13), and the rectangular support plates (13) (1)
3) Standing in parallel with a small gap of several millimeters from one side.

又、建築物の構造体(壁や梁等)を受止板として利用可
能であれば、特に設ける必要はない。
Further, if the structure of the building (wall, beam, etc.) can be used as the receiving plate, it is not particularly necessary to provide it.

尚、上記においては、受止板(20)は垂直に設けている
が、方形状支持板(13)(13)の上辺、又は下辺部に対
して平行に、すなわち水平に設けてもよいのはもちろん
である。
In the above description, the receiving plate (20) is provided vertically, but it may be provided parallel to the upper side or the lower side of the rectangular support plates (13) (13), that is, horizontally. Of course.

(21)は爪具(16)のローラー(17)がカム板(10)の
外周より離脱した際の移動位置を予測し、その位置に設
けたマイクロスイッチで、爪具(16)の上辺部が当接し
て通電されることにより爪具(16)のローラー(17)が
カム板(10)外周より離脱して、爪具(16)の爪先(16
a)が爪車(11)に噛合して、シャッターの急激落下を
停止させたことを示す信号を送ると共に、同時に電動開
閉機の停止,警報ブザーへの発信等を行わしめるもので
ある。
Reference numeral (21) is a microswitch provided at the position where the roller (17) of the nail tool (16) moves when the roller (17) is separated from the outer periphery of the cam plate (10), and is located at the upper side of the nail tool (16). Are contacted with each other to be energized, the roller (17) of the nail tool (16) is separated from the outer periphery of the cam plate (10), and the toe (16) of the nail tool (16) is removed.
The a) meshes with the ratchet wheel (11) to send a signal indicating that the sudden drop of the shutter has been stopped, and at the same time, stop the electric switchgear and send a warning buzzer.

このように構成したので、常態の降下時においては、電
動,手動のシャッターを問わず、所定のゆっくりとした
速度で降下し、爪具(16)のローラー(17)はカム板
(10)の外周に沿って摺接し、ゆっくりと揺動運動をし
ているだけである。従って、この時は爪具(16)の爪先
(16a)は爪車(11)に噛合することなく、方形状支持
板(13)(13)にも何らの力も伝わらない。
With this structure, during normal descent, the roller (17) of the claw tool (16) is lowered by the cam plate (10) regardless of whether it is an electric or manual shutter. It is in sliding contact along the outer circumference, and only makes a slow rocking motion. Therefore, at this time, the toes (16a) of the nail tool (16) do not mesh with the ratchet wheel (11), and no force is transmitted to the rectangular support plates (13) (13).

ところが異常時、例えばローラーチェーン(8)が切断
したり、開閉機のブレーキ系統に故障があったりした場
合シャッターは急激に落下して、該シャッターの巻取り
軸(3)も回転速度が急激に増加する。この時、巻取り
軸(3)に固着してあるカム板(10)及び爪車(11)も
共に回転速度が増し、カム板(10)の外周に摺接,揺動
運動していた爪具(16)のローラー(17)は、カム板
(10)のカム片(10a)により外方に叩打されて、カム
板(10)外周より離脱し、爪具(16)は支軸(18)を中
心に右方向に回動し、爪具(16)の爪先(16a)が爪車
(11)に噛合して、これまで左方向に回転していた爪車
(11)にロックして停止させるものである。この際、爪
具(16)の支軸(18)により回転力を受止するものであ
るが、該支軸(18)は方形状支持板(13)(13)の中心
回動軸(11a)(爪車のボス部)から所定間隔を存した
外側部に支承されているため方形状支持板(13)(13)
をその中心回動軸(11a)を中心に左方向に回動させる
ものである。
However, in the event of an abnormality, for example, when the roller chain (8) is broken or the brake system of the opening / closing machine is broken, the shutter falls abruptly, and the winding shaft (3) of the shutter also rapidly rotates. To increase. At this time, the rotation speed of both the cam plate (10) and the ratchet wheel (11) fixed to the take-up shaft (3) is increased, and the pawl is slidably contacting the outer periphery of the cam plate (10) and swinging. The roller (17) of the tool (16) is tapped outwardly by the cam piece (10a) of the cam plate (10) and separated from the outer circumference of the cam plate (10), and the claw tool (16) moves the support shaft (18). ) To the right, and the toe (16a) of the nail tool (16) meshes with the ratchet wheel (11) and locks on the ratchet wheel (11) that has been rotating to the left. It is to stop. At this time, the support shaft (18) of the claw tool (16) receives the rotational force, and the support shaft (18) rotates the central rotation shaft (11a) of the rectangular support plates (13) (13). ) (Square-shaped support plate (13) (13) because it is supported on the outer side with a certain distance from the boss part of the ratchet wheel)
Is rotated leftward about the central rotation shaft (11a).

しかるに、この方形状支持板(13)(13)の外周の一辺
部には数ミリメートルの間隔を存して受止板(20)が設
けられているので、ほとんど即座にこの受止板(20)に
当接し、停止させられるものである。
However, since the receiving plates (20) are provided at intervals of a few millimeters on one side of the outer periphery of the rectangular support plates (13) (13), the receiving plates (20) are almost instantly formed. It comes into contact with and is stopped.

なお、方形状支持板(13)(13)と受止板(20)との間
隙を適宜調整して、少し遊びを持たせ、緩衝材を配設
し、あまりにも急激な停止を避けることもできる。
The gap between the rectangular support plates (13) and (13) and the receiving plate (20) may be adjusted as appropriate to allow a little play and a cushioning material may be provided to avoid a sudden stop. it can.

又、この急激落下防止装置(9)が作動する時の巻取り
軸(3)の回転速度は、ローラー(17)のカム板(10)
への押し付け力、カム板(10)のカム片(10a)の形状
によって変化するので、状況に応じて適宜選択するとよ
い。
The rotation speed of the take-up shaft (3) when the sudden drop prevention device (9) operates is determined by the cam plate (10) of the roller (17).
Since it changes depending on the pressing force on the cam plate (10a) and the shape of the cam piece (10a) of the cam plate (10), it may be appropriately selected depending on the situation.

次に停止状態を元に戻すには、シャッターが上昇するよ
うに、すなわち本実施例においては巻取り軸(3)を右
方向に回転するのみでよいものである。
Next, in order to return the stopped state to the original state, it suffices that the shutter is raised, that is, in the present embodiment, the winding shaft (3) is rotated rightward.

〔効果〕〔effect〕

以上のように、本考案のシャッターの急激落下防止装置
によれば、シャッターの巻取り軸(3)と共に回転する
カム板(10)および爪車(11)と、常態においては、一
方に設けたローラー(17)がカム板(10)の外周に接触
し、巻取り軸(3)が一定の回転速度に達した際には、
他方に形成された爪先(16a)が爪車(11)に噛合する
爪具(16)と、巻取り軸(3)に回動自在に嵌められ、
爪具(16)の略中央の支軸(18)を回動自在に支承する
方形支持板(13)と、爪具(16)が爪車(11)に噛合し
た時に、爪具(16)と反対方向に回動する方形支持板
(13)(13)の回動力を受止、停止させるための受止板
(20)とで構成されているので、電動,又は手動を問わ
ず、シャッターの降下時に何らかの異常が発生して、シ
ャッターが急激に落下しようとした際、即座に停止させ
ることができるものであり、シャッターの下方位置に何
らかの障害物があっても事故を招く心配は全くないもの
である。
As described above, according to the shutter sudden drop prevention device of the present invention, the cam plate (10) and the ratchet wheel (11) that rotate together with the shutter winding shaft (3) are provided on one side in a normal state. When the roller (17) comes into contact with the outer periphery of the cam plate (10) and the winding shaft (3) reaches a certain rotation speed,
The toe (16a) formed on the other side is rotatably fitted to the nail tool (16) that meshes with the ratchet wheel (11) and the winding shaft (3),
When the rectangular support plate (13) that rotatably supports the support shaft (18) at the substantially center of the claw tool (16) and the claw tool (16) meshes with the claw wheel (11), the claw tool (16). Since it is composed of a receiving plate (20) for receiving and stopping the rotational force of the rectangular support plates (13) (13) that rotate in the opposite direction, the shutter can be operated electrically or manually. When something abnormal occurs during the descent of the shutter and the shutter is about to drop suddenly, it can be stopped immediately, and even if there is any obstacle in the lower position of the shutter, there is no fear of causing an accident at all. It is a thing.

又、巻取り軸(3)が撓んだシャッターを含め、既設の
シャッターに対しても、取り付けることができるもので
あり、請求項(2)に示すように、巻取り軸(3)の回
転停止をマイクロスイッチ(21)に連動させて、電動シ
ャッターの電源の閉止,警報ブザー等への発信を行うよ
うにしたので、電気の節約,事故の早期発見ができるも
のである。
Further, the winding shaft (3) can be attached to existing shutters including a flexed shutter, and as shown in claim (2), rotation of the winding shaft (3). The stop is interlocked with the micro switch (21) to close the power supply of the electric shutter and send a warning buzzer, etc., so that electricity can be saved and an accident can be detected early.

【図面の簡単な説明】[Brief description of drawings]

図面は本考案の実施例を示すもので、第1図は正面図、
第2図は最外側の方形状支持板を取り去った要部拡大側
面図、第3図は要部を示す一部破断拡大正面図、第4図
は最外側の方形状支持板を取り去った他の実施例の要部
拡大側面図で、方形状支持板が受止板に当接した状態を
示すものである。 (1)…電動シャッター、(9)…急激落下防止装置、
(10)…カム板、(11)…爪車、(13)…方形状支持
板、(16)…爪具、(17)…ローラー、(20)…受止
板、(21)…マイクロスイッチ。
FIG. 1 shows an embodiment of the present invention, FIG. 1 is a front view,
FIG. 2 is an enlarged side view of an essential part with the outermost rectangular support plate removed, FIG. 3 is an enlarged front view of a partly cutaway view of the essential part, and FIG. 4 is an illustration of the outermost rectangular support plate removed. FIG. 4 is an enlarged side view of the main part of the embodiment of FIG. 2, showing a state in which the rectangular support plate is in contact with the receiving plate. (1) ... electric shutter, (9) ... sudden drop prevention device,
(10) ... Cam plate, (11) ... Claw wheel, (13) ... Square support plate, (16) ... Claw tool, (17) ... Roller, (20) ... Receiving plate, (21) ... Micro switch .

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】シャッターの巻取り軸(3)と共に回転す
るカム板(10)及び爪車(11)と、常態においては、一
方に設けたローラー(17)がカム板(10)の外周に接触
し、巻取り軸(3)が一定の回転速度に達した際には、
他方に形成された爪先(16a)が爪車(11)に噛合する
爪具(16)と、巻取り軸(3)に回動自在に嵌められ、
爪具(16)の略中央の支軸(18)を回動自在に支承する
方形支持板(13)と、爪具(16)が爪車(11)に噛合し
た時に、爪具(16)と反対方向に回動する方形支持板
(13)(13)の回動力を受止、停止させるための受止板
(20)とで構成されていることを特徴とするシャッター
の急激落下防止装置。
1. A cam plate (10) and a ratchet wheel (11) that rotate together with a shutter winding shaft (3) and, in a normal state, a roller (17) provided on one side of the cam plate (10) on the outer periphery of the cam plate (10). When they come into contact and the winding shaft (3) reaches a certain rotation speed,
The toe (16a) formed on the other side is rotatably fitted to the nail tool (16) that meshes with the ratchet wheel (11) and the winding shaft (3),
When the rectangular support plate (13) that rotatably supports the support shaft (18) at the substantially center of the claw tool (16) and the claw tool (16) meshes with the claw wheel (11), the claw tool (16). And a support plate (20) for receiving and stopping the turning force of a rectangular support plate (13) (13) which rotates in the opposite direction to the sudden drop prevention device for a shutter. .
【請求項2】巻取り軸(3)の回転停止をマイクロスイ
ッチ(21)に連動させて、電動シャッターの電源の閉
止,警報ブザー等への発信を行うようにしたことを特徴
とする請求項(1)記載のシャッターの急激落下防止装
置。
2. The rotation stop of the winding shaft (3) is interlocked with the micro switch (21) to close the power source of the electric shutter and to transmit a warning buzzer or the like. A device for preventing a sudden drop of a shutter described in (1).
JP1989031763U 1988-03-20 1989-03-20 Shutter fall prevention device Expired - Lifetime JPH0725438Y2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1989031763U JPH0725438Y2 (en) 1989-03-20 1989-03-20 Shutter fall prevention device
KR2019890012043U KR920005995Y1 (en) 1988-03-20 1989-08-16 Apparatus for preventing sudden drop of shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989031763U JPH0725438Y2 (en) 1989-03-20 1989-03-20 Shutter fall prevention device

Publications (2)

Publication Number Publication Date
JPH02123598U JPH02123598U (en) 1990-10-11
JPH0725438Y2 true JPH0725438Y2 (en) 1995-06-07

Family

ID=12340074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989031763U Expired - Lifetime JPH0725438Y2 (en) 1988-03-20 1989-03-20 Shutter fall prevention device

Country Status (2)

Country Link
JP (1) JPH0725438Y2 (en)
KR (1) KR920005995Y1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4616065B2 (en) * 2005-04-26 2011-01-19 トステム鈴木シャッター株式会社 shutter
KR100695956B1 (en) * 2006-03-22 2007-03-16 주식회사 스페샬화인 Rising Guide for Overhead Door with Break Function
CN107640677A (en) * 2017-10-30 2018-01-30 宁波天弘电力器具有限公司 One kind declines early warning component
DE102019120036A1 (en) * 2019-07-24 2021-01-28 Columbus Mckinnon Industrial Products Gmbh Hoist

Also Published As

Publication number Publication date
KR920005995Y1 (en) 1992-08-27
KR900017213U (en) 1990-10-05
JPH02123598U (en) 1990-10-11

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