JPS5816931A - Control lever device - Google Patents

Abstract

PURPOSE:To improve safety of a rear body of a dump truck in its tilting operation, by supporting a control lever with a bearing slidably to the two directions crossing to each other with respect to a fixed bracket, lifting the rear body with the control lever and surely holding said control lever to each of its control position. CONSTITUTION:A boss 12 is provided to a bracket 11, fixed to a floor part 9F in a driver's room, and a shaft part 14, to one end of which a groove shaped member 13 is provided, is turnably inserted into said boss 12. A lever root part 15 is fitted to the groove shaped member 13 and supported by a bearing 16 while urged in one direction by a coil spring 17. The base end of a control lever 18, partially formed with a folded part, is secured to the lever root part 15, and a stopper 20 is protrusively provided in the vicinity of said base end. Said control lever 18 is guided along a guide member 21, secured to the bracket 11 and formed with a protrusive guide surface 22 at one side end, and its movement is transmitted to a selector valve or the like through a control cable 20 connected by a yoke 26 to a bracket 25 integrally formed with the shaft part 14.

Description

[Detailed description of the invention] The present invention relates to an operating lever device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a cargo box placed on a vehicle body 2 so that it can be tilted backwards by a hydraulic cylinder 6, 4 is a power take-off device, and a torque shaft 5 is shown. A hydraulic pump 6 is driven through the entire system, and the hydraulic pump 6 and the hydraulic cylinder 6 are connected via hydraulic piping via a switching valve 7.

Reference numeral 8 denotes an operating lever device provided on the floor 9F in the driver's seat 9, and is connected to the switching valve 7 via a control cable 10.

The operation lever device 8 will be described in detail below with reference to FIGS. 2 and 3. Reference numeral 11 denotes a bracket fixedly installed on the floor 9F in the driver's cab 9, and a boss 12 provided on the bracket 11 has a
A shaft portion 14 having a groove-shaped member 13 at one end is rotatably inserted. Further, the lever base 15 is connected to the groove-shaped member 13.
The coil spring 1 is fitted into the
7 to rotate in one direction.

Reference numeral 18 denotes an operating lever with a bent portion formed in a portion thereof, a grip portion 19 is provided at the tip of the operating lever 18, and the other end is fixed to the lever base 15, and a stopper 20 is roughly inserted from near the other end. It protrudes toward the groove-shaped member 13. Next, reference numeral 21 denotes a guide member having a convex guide surface 22 formed entirely on one side end, and the operation lever 1 is moved along the guide surface 22.
8 is slid. In addition, the convex portion 23 of the guide surface 22 has
A semicircular arc-shaped notch 24 is bored.

25 is a bracket fixed to the shaft part 14, fWJ
The control cable 10 is pivotally supported 27 by a yoke 26 attached to one end thereof.

Note that 28 is a bolt for fixing the control cable 10 to the floor portion 9F.

The operation of the present invention will be explained below.
When returning the dump truck from the lowered position to the neutral position, first
From the position indicated by the solid line in the figure, it is slid along the convex portion 23 of the guide surface 22 against the coil spring 17, and further swung to the semicircular arc notch 24 of the convex portion 26. Next, in order to move the operating lever 18 from the neutral position to the dump raising position, first move the operating lever 18 against the coil spring 17 into the semicircular arc notch 2.
4 and swing downward, then coil spring 1
If it slides along the convex portion 23 of the guide member 21 while being biased by the guide member 7, it is locked in the dump raising position.

As described above, according to the present invention, in addition to being able to reliably raise and lower the cargo box, the operating lever is also reliably held at each operating position. This control lever device is extremely useful in terms of safety because it can prevent erroneous operations caused by the operator's hands touching it.

[Brief explanation of the drawing]

Figure 1 is a side view of a dump truck equipped with the device of the present invention;
The figure is a perspective view of the embodiment of the present invention, and FIG. 6 is a side view of the embodiment of the present invention, including a partially broken surface. 9F...floor, 18...operation lever, 20...
...Guide member.

Claims (1)

[Claims] an operating lever pivotably supported by a bracket fixed to a floor so as to be swingable in two mutually intersecting directions; a guide member forming a convex guide surface for guiding and supporting the operating lever; An operating lever device comprising means for biasing a guide member.