Sprinkler head
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- NOHMI BOSAI LTD
- Filing Date
- 2024-12-04
- Publication Date
- 2026-06-16
AI Technical Summary
【0015】 本発明においては、プランジャのフランジ部の下面に設けられる円環突部をフランジ部の最外周より内側に位置させたことにより、下方からの外力によってプランジャが変形したとしても、ヒートコレクタの下降動作が阻害されないようになっている。 すなわち、本発明に係るスプリンクラヘッドは、衝撃吸収材であるブッシュを用いなくとも下方からの外力を受けたとしても作動不良が生じない。
Smart Images
Figure 2026097066000001_ABST
Abstract
Claims
1. A sprinkler head comprising a head body having a water outlet, a valve body provided in the water outlet, and a valve body support mechanism for supporting the valve body, The valve support mechanism comprises a plunger having a cylindrical portion and a flange portion that protrudes outward in an annular plate shape from the lower end of the cylindrical portion, and a heat-sensitive element provided on the flange portion of the plunger. The plunger is characterized by having an annular projection on the lower surface of the flange portion that is located inward from the outermost circumference and protrudes downward.
2. The sprinkler head according to claim 1, characterized in that the annular projection is formed such that the distance from the bent portion formed at the boundary between the cylindrical portion and the flange portion to the lower outer edge of the annular projection is less than or equal to the distance from the bent portion to the lower outer edge of the flange portion.
3. The sprinkler head according to claim 2, characterized in that the inner circumferential surface of the bent portion is chamfered in a tapered shape that widens downwards.