JPH035493Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for automatic extension of outriggers.

Conventionally, when retracting the outrigger slide arm, a lock pin was inserted to prevent it from popping out while driving, but in some cases, problems such as forgetting to insert or remove the lock pin could occur, which could even lead to a serious accident.

Focusing on these problems, we designed the outrigger slide arm so that when it is retracted, there is no need to insert a pin, etc., and the cam mechanism installed inside the arm works in conjunction with the lock pin to prevent it from popping out while driving. It is something.

An example of implementation will be explained with reference to the drawings. 1 is a slide arm, 2 is a frame, 3 is a slide cylinder, 4 is a cam, 5 is a lock pin, 6 is a spring, 7 is a pin, 8 is the other pin of the cam 4, 9
10 is a clevis of the cylinder rod, and 10 is a pin hole drilled in the slide arm 1.

In the first illustration, the slide arm 1 is housed in the frame 2, and the lock pin 5 is pushed up by the force of the spring 6 into the pin hole 1 of the slide arm 1.
It goes to 0 and is locked. The pin 7 is rotatably connected to the clevis 9 of the cylinder rod and the cam 4, and the pin 8 is rotatably connected to the slide arm 1 and the cam 4.

FIG. 2 shows a state in which the slide cylinder 3 is extended, the cam 4 rotates counterclockwise (arrow) about the pin 8, and the lock pin 5 is pushed down.

FIG. 3 shows the slide cylinder 3 of FIG. 2 further extended and the lock pin 5 removed from the pin hole 10.

Figure 4 shows the slide cylinder 3 from the state shown in Figure 3.
The figure shows a state in which the cam 4 is reduced in size (the cam 4 rotates clockwise about the pin 8). Furthermore, the fourth
When the slide cylinder is contracted from the state shown in the figure and the pin hole 10 comes to the position of the lock pin 5, it returns to the state shown in FIG.

With this mechanism configured as described above, when the slide arm 1 is in the retracted state (as shown in the first figure), the frame 2
Since the lock pin 5 is inserted into the pin hole 10 (pushed up by the spring 6), the slide arm 1 does not fly out (left arrow).

The lock pin 5 is released from the pin hole 10 only when the slide arm 1 is extended, and the lock pin 5 is not released unless the slide cylinder 3 is extended (the arm 1 is extended). A series of link mechanisms (rotating cams) can accomplish the initial purpose.

This not only eliminates the trouble of inserting the lock pin when retracting the slide arm, or the unsafe situation such as the truck popping out while the truck is running, but also solves the problem that there is no space for inserting the lock pin in side-mounted cranes. The role it plays as a safety device is remarkable.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the state when the slide arm of the outrigger is retracted, Figure 2 is an explanatory diagram of the state when the slide cylinder begins to extend, Figure 3 is an explanatory diagram of the state when the slide cylinder is further extended, 4
The figure is an explanatory diagram of the state when the slide cylinder is contracted, and FIG. 5 is a cross-sectional layout diagram of the inside of the frame. 1...Slide arm, 2...Frame, 3...
...Slide cylinder, 4...Cam, 5...Lock pin.

Claims (1)

[Scope of utility model registration request] Among outrigger extension devices installed on trucks and the like, in an outrigger device that uses a cylinder for pulling out the slide arm, a lock pin 5 for fixing the slide arm 1 and frame 2 during storage is attached to the frame 2 via a spring 6, The rod 9 of the slide cylinder 3 has a pin 7,
A locking device for automatic extension of an outrigger, characterized in that a cam 4 attached via a cam 8 rotates and a lock pin 5 is released from a slide arm 1 only when a slide cylinder 3 is extended.