JPH02105494U

JPH02105494U -

Info

Publication number: JPH02105494U
Application number: JP1787389U
Authority: JP
Priority date: 1988-10-20
Filing date: 1989-02-20
Publication date: 1990-08-22

Description

[Brief explanation of the drawing]

第１図は本考案の第１の実施例であるシヤツタ
ーの落下防止装置の要部の斜視図、第２図は同上
落下防止装置を備えたシヤツターの一部破断正面
図、第３図は、本考案の第２の実施例によるシヤ
ツターの落下防止装置の要部の斜視図、第４図は
同実施例の落下防止装置を備えたシヤターの一部
破断正面図、第５図は本考案の第３の実施例によ
るシヤツターの落下防止装置の平面図、第６図は
第５図における−線断面図である。１……モーター、２……駆動スプロケツト、３
……巻取軸、４……従動スプロケツト、５……駆
動チエーン、９，３０……アーム、１０，３１…
…アイドラー、１１，２７，２８……付勢手段（
スプリング、重り）、１３，２４……ラチエツト
ギヤ、１４，２５……ストツパー、１５……スラ
ツトカーテン。 Fig. 1 is a perspective view of the main parts of a fall prevention device for a shutter according to the first embodiment of the present invention, Fig. 2 is a partially cutaway front view of a shutter equipped with the above fall prevention device, and Fig. 3 is a A perspective view of the main parts of a fall prevention device for a shutter according to a second embodiment of the present invention, FIG. 4 is a partially cutaway front view of a shutter equipped with a fall prevention device according to the second embodiment, and FIG. FIG. 6 is a plan view of the shutter drop prevention device according to the third embodiment, and is a sectional view taken along the line -- in FIG. 5. 1...Motor, 2...Drive sprocket, 3
... Winding shaft, 4 ... Driven sprocket, 5 ... Drive chain, 9, 30 ... Arm, 10, 31 ...
...Idler, 11, 27, 28...Biasing means (
spring, weight), 13, 24... ratchet gear, 14, 25... stopper, 15... slat curtain.

Claims

[Scope of utility model registration request]

A drive device for a shutter in which the take-up shaft rotates and the slat curtain is hoisted and lowered by the forward and reverse rotation of an endless chain that goes around the drive sprocket on the motor side and the driven sprocket on the slat curtain take-up shaft side. , a ratchet gear fixedly provided on the side wall of the driven sprocket on the winding shaft side or the outer periphery of the winding shaft; a stopper facing the ratchet gear so as to be able to mesh therewith and pivotally supported on a stationary portion; and a stopper projecting from the stopper. It consists of an idler that is pivotally supported by the protruding end of the arm that abuts the chain, and a biasing means that is provided to press the idler against the chain. A drop prevention device for a shutter, characterized in that the stopper is separated from the outer periphery of the ratchet gear which is rotated in a descending direction, and the stopper is configured to engage with the ratchet gear by the urging of the urging means when the chain is abnormally disconnected.