JPS6316316U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the operating device of the present invention. Figure 2 is a vertical cross-sectional view taken along the - line. FIG. 3 is a side view with the brake unlocked and the swing lever swung to the other position. FIG. 4 is a side view of the state in which the swing lever is swung to one position and the brake lock is automatically released. FIG. 5 is a longitudinal sectional side view illustrating another embodiment of the operating element. FIG. 6 is a longitudinal sectional front view showing a conventional device. In the figure, a is one position, b is an intermediate position, c is the other position, 1 is the lever base, 2 is the drum, 3 is the operating lever, 4 is the drum shoe, 5 is the brake camshaft, 6 is the brake lever, and 7 is the operation 8 is a push spring, 9 is an operating element, 10 is a return spring, 11 is a guide portion, and 12 is an operating piece.

Claims (1)

[Scope of utility model registration request] An operating lever 3 is pivotally supported coaxially with the drum 2 on a lever base 1 having a drum 2, and a brake shoe 4 is provided on the operating lever 3 so as to face the inner surface of the drum 2, and a brake cam shaft 5 is provided on the operating lever 3. is provided so that the brake shoe 4 moves toward and away from the drum 2 in response to the rotation of the camshaft 5, and the operating rod 7 is linked to a brake lever 6 that can swing integrally with the brake camshaft 5. The actuating rod 7 is provided with a push spring 8 which can press the brake shoe 4 against the drum 2 through the actuating rod 7, and an operating element 9 which can actuate the actuating rod 7 against the pushing spring 8. In addition, a return spring 10 is attached to the lever base 1 so that the operation lever 3, which receives the pressure of the return spring 10, moves back from one position a side of the swing range to a halfway position b, and the guide part 11 is connected to the operation lever. 3, and is positioned on the rotational trajectory of the actuating piece 12 which is pivotally supported by the operating lever 3 and interlocks with the actuating rod 7, and is pushed while the actuating rod 7 moves from one position a of the operating lever 3 to just before the halfway position b. The operating device is formed so that it can be guided and controlled through its operating piece 12 under a state in which it is operated against a spring 8.