JPS62179866U

JPS62179866U -

Info

Publication number: JPS62179866U
Application number: JP6768786U
Authority: JP
Priority date: 1986-05-07
Filing date: 1986-05-07
Publication date: 1987-11-14

Description

[Brief explanation of the drawing]

第１図はこの考案の１実施例を一部断面にて示
す配置図、第２図はブレーキペダル踏込力―無負
荷の減速度及び基準負荷の減速度特性を示す線図
、第３図は従来構造を示す斜視図である。１：タンデム型マスタシリンダ、２：小径シリ
ンダ、３：大径シリンダ、４：第１ピストン、５
：第２ピストン、９：ブレーキペダル、１０：倍
力装置、１２：電磁弁（切換弁）、１３，１４：
ブレーキ装置、１５：フオーク、１６：リフトシ
リンダ、１８：圧力スイツチ（圧力検出手段）。 Fig. 1 is a layout diagram showing a partial cross-section of an embodiment of this invention, Fig. 2 is a diagram showing the brake pedal depression force--no-load deceleration and reference load deceleration characteristics, and Fig. 3 is a diagram showing the characteristics of brake pedal depression force - no-load deceleration and reference load FIG. 2 is a perspective view showing a conventional structure. 1: Tandem type master cylinder, 2: Small diameter cylinder, 3: Large diameter cylinder, 4: First piston, 5
: 2nd piston, 9: Brake pedal, 10: Booster, 12: Solenoid valve (switching valve), 13, 14:
Brake device, 15: fork, 16: lift cylinder, 18: pressure switch (pressure detection means).

Claims

[Scope of utility model registration request]

A tandem master cylinder includes a large-diameter cylinder that generates low-pressure fluid and a small-diameter cylinder that generates high-pressure fluid, and the large-diameter cylinder and the small-diameter cylinder are selectively connected to the brake device according to the depression force of the brake pedal. It has a switching valve for switching connection and a pressure detection means for detecting the internal pressure of a lift cylinder that raises and lowers the fork, and when the internal pressure of the lift cylinder is equal to or higher than a predetermined pressure, the small diameter cylinder is connected to the brake device. A brake device for a forklift, characterized in that the switching valve is switched.