JPH0118689Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an operating lever device for construction machinery such as a hydraulic excavator.

[Prior Art] As shown in FIG. 4, an operating lever device for construction machinery includes an operating lever a whose operating method is a cross type. The operating lever a is pivotally connected to a block c rotatably attached to a lever stand b, and when the operating lever a is moved in the left-right direction, the operating lever a swings around the block c as a fulcrum and moves to the rod d. When the control lever a is moved up and down and the control lever a is moved back and forth, the control lever a rotates together with the block c to move the rod e up and down.

However, the operating direction of the operating lever a and the operation and direction of the construction machine are freely determined by each manufacturer and are not standardized at present.
Therefore, when construction machines of the same type with different operating directions are deployed at the same work site, workers are likely to make erroneous operations, which may cause accidents, which is not desirable from a safety standpoint.

Therefore, the operating lever a and each rod d, e are separated, the lever stand b is replaced, and the operating lever a is
The rods d and e are reconnected to the operating lever so that the operating direction of the construction machine and the operation of the construction machine can be changed.

However, the above-mentioned modification work is troublesome and time-consuming, making it difficult for operators to easily change the direction of operation to which they are accustomed.

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention attempts to provide an operating lever device whose operating direction can be easily changed.

[Means for Solving the Problems] The present invention provides a lever stand with a lever unit to which an operating lever and a valve operating rod are connected in a rotatable manner, and a direction change lever provided on the lever unit on a lever stand. The lever unit can be engaged with and disengaged from the stopper, which is extended and inserted through the lever stand, at each position when the lever unit is rotated 90 degrees.

[Operation] With the above configuration, the operating direction of the operating lever can be changed by appropriately rotating the lever unit.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIG. 3 is an external view of the operating lever of the present invention.
The lever unit 1 is rotatably provided with respect to the lever stand 2, and the lever unit 1 is configured to be able to rotate 90 degrees when the direction change lever 3 is set horizontally. This will be explained in detail below with reference to FIGS. 1 and 2.

Lever unit 1 is mounted on the top of lever stand 2.
A fitting hole 4 is bored, and the lever unit 1 is rotatably fitted into the fitting hole 4. The lever unit 1 is provided in a suspended state in this fitting hole 4.

A ring 5 is rotatably fitted into the fitting hole 4 from above, and a substrate 6 is fixed to the ring 5 from below.
A seat 7 is provided protruding from the base plate 6, and an L-shaped support plate 8 is attached to the seat 7. Further, a flexible block 9 that can rotate around two orthogonal horizontal axes is attached to the support plate 8, and the operating lever 10 is fixed to this flexible block 9. Push-pull cables 1 are connected to each horizontal axis of the flexible block 9.
Pivotally attach the tips of 1 and 12. The push-pull cables 11 and 12 each pass through the bent portion 13 of the support plate 8, and the outer casing of the push-pull cable is inserted into the nut 1 at the penetration point.
It is fixed at 4,15. An L-shaped switching lever 3 rotatable about a horizontal axis is provided on the vertical portion 16 of the support plate 8 via a bracket 17, and a lock plate 18 is fixed to the direction switching lever 3. A lock pin 19 extending downward is provided on the flexible block 9, and a lock hole 20 is bored in the lock plate 18 so that the lock pin 19 and the lock plate 18 can be engaged with each other. 2 on the substrate 6
Stopper fittings 21 and 22 are fixed at locations shifted by 90 degrees with respect to the center of rotation of the substrate 6, and recesses 24 are formed in the stopper fittings 21 and 22 into which the tips of stoppers 23, which will be described later, are fitted. A stopper 23 formed by a knob 25 and a bolt 26 is threaded onto the front surface of the lever stand 2, and a pin 27 is passed through the bolt 26 to prevent it from coming off. Further, a slot 28 is bored from the front side to the side of the lever stand so that the direction changing lever 3 projects from the slot 28 and does not interfere with rotation through 90 degrees.

Next, the operation will be explained.

When changing the operating direction of the operating lever 10, the stopper 23 is rotated to disengage the tip of the bolt 26 from the recess 24 of the stopper fitting 21. The direction change lever 3 is rotated until it becomes horizontal, and the lock plate 18 is engaged with the lock pin 19. The engagement of the lock plate 18 and the lock pin 19 restrains the flexible block 9, and the operating lever 10 and push-pull cables 11, 12 are fixed.

Rotate the lever unit 1 by holding the direction change lever 3. When the lever unit 1 is rotated 90 degrees, the stopper 23 is tightened to engage the stopper 23 and the stopper fitting 22, and the lever unit 1 is fixed. When the direction change lever 3 is rotated in the opposite direction to that described above, the lock plate 18 is disengaged from the lock pin 19, and the operating lever 10 can be freely moved. Furthermore, since the lever unit 1 is rotated by 90 degrees due to the above operation, the operating direction of the operating lever 10 is changed.

Note that the push-pull cables 11 and 12 are twisted due to the rotation of the lever unit 1, but the push-pull cables have sufficient length so that the lever unit 1
rotation is allowed.

Further, in the above embodiment, the stopper and the stopper fitting can be engaged and disengaged using a screw, but the stopper is slidably inserted through the lever stand and the stopper and the stopper fitting are connected by a spring force or the like. It may be possible to engage and disengage.

[Effects of the invention] As described above, according to the invention, anyone can easily and quickly change the operating direction of the operating lever without using any tools.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of the operating lever device according to the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is an external perspective view of the device, and FIG. It is an explanatory diagram. 1 is the lever unit, 2 is the lever stand, 3
is the direction change lever, 10 is the operation lever, 11,1
2 is a push-pull cable, and 23 is a stopper.

Claims (1)

[Scope of utility model registration request] A lever unit to which a rod for operating the valve is connected is rotatably provided on a lever stand, and a direction changing lever provided on the lever unit is extended outside the lever stand, and a stopper inserted through the lever stand and the lever unit are connected. An operating lever device for construction machinery, characterized in that the lever unit can be engaged and disengaged at each position when the lever unit is rotated 90 degrees.