JP3657158B2 - Construction machine control lever stopper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stopper for an operation lever of a construction machine such as a crane.
[0002]
[Prior art]
The operation levers of these construction machines are provided with a stopper for fixing an operation lever that is not used so that it does not move so as not to malfunction when operation is unnecessary. This stopper is provided with an arm having an engagement recess to the lever shaft so that it can rotate on the side of the operation lever. When the operation lever is fixed, the engagement recess is engaged with the lever shaft, and the arm is opposite when released. Tilt to the side to release the engagement between the engaging recess and the lever shaft.
[0003]
[Problems to be solved by the invention]
However, in the above-described configuration, the arm is tilted to the opposite side, which is good when the interval between the plurality of operation levers is wide, but when the interval between the operation levers is narrow, the arm is placed on the adjacent operation lever. Because it interfered, it could not be dealt with, and it was attached only to the control levers on both sides with ample side.
[0004]
Accordingly, an object of the present invention is to provide a stopper for an operation lever of a construction machine that can be used even when the interval between a plurality of operation levers is narrow.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides an operation lever stopper for a construction machine in which an arm having an engagement recess for the lever shaft portion is rotatably provided on a side portion of the operation lever. The bracket is provided with a U-shaped bracket having standing pieces at both ends, and the arm is provided on the bracket so as to be pivotable and slidable in the axial direction of the supporting shaft. The arm contacts the upper surface of the standing piece. It is characterized in that a notch portion that is in contact with and restricted from rotating is formed. When the lever stand upper surface is inclined, the notch portion is formed on the lower side of the arm, so that the contact state of the arm with the upright piece upper surface is maintained by the weight of the plate material.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. The lever stand 1 installed in the cab of the construction machine is provided with an inclination so that the upper surface provided with the plurality of operation levers 2 is lowered toward the driver's seat in consideration of the field of view during operation. A stopper 3 that restricts the movement of the operation lever 2 is disposed on the side of each operation lever 2.
[0007]
The stopper 3 includes a bracket 4 provided on the upper surface of the lever stand 1 and an arm 6 provided on the bracket 4 so as to be rotatable by a support shaft 5. The bracket 4 is formed in a U shape having standing pieces 4a and 4b at both ends, and is provided on the upper surface of the lever stand 1 with the standing piece 4a on the lower side and the standing piece 4b on the higher side. The arm 6 is provided so as to be able to rotate and slide in the axial direction of the support shaft 5 on a support shaft 5 installed between the standing pieces 4 a and 4 b of the bracket 4.
[0008]
The arm 6 has an engagement recess 6 a to the shaft portion of the operation lever 2. In addition, a notch portion 6b that is in contact with the upper surface of the upright piece 4a and whose rotation is restricted is formed at the lower end portion of the arm 6. In this embodiment, the engagement recess 6a is provided at a position where the operation lever 2 is fixed in a neutral state. However, if the position of the engagement recess 6a is changed, the operation lever 2 can be fixed even in an operating state, and the stopper It is possible to expand the application of 3.
[0009]
With this configuration, the movement of the operating lever 2 is restricted by tilting the arm 6 and engaging the engaging recess 6 a with the shaft portion of the operating lever 2. The arm 6 is positioned when the arm 6 is tilted by the rotation restricting member 4 c provided on the bracket 4. In order to use the operation lever 2 from this state, the arm 6 is erected to release the engagement between the engaging recess 6a and the shaft part of the operation lever 2, and the arm 6 is erected to raise the notch 6b. When the arm 6 is slid so as to come into contact with the upper surface of the piece 4a, the arm 6 is restricted from further rotation and is held in an upright state. At this time, since the notch 6 b of the arm 6 is formed on the lower side of the upper surface of the lever stand 1, the arm 6 is kept upright by its own weight.
[0010]
Therefore, the amount of rotation of the arm 6 is ½ or less of the conventional one, and the arm 6 does not fall to the adjacent operation lever 2 side. Therefore, even if the interval between the operation levers 2 is narrow, the stopper 3 is provided on each operation lever 2. It is possible to improve safety by reliably preventing malfunction when no operation is required.
[0011]
【The invention's effect】
As described above, the stopper of the operation lever of the construction machine according to the present invention is provided with a U-shaped bracket having standing pieces on both sides of the operation lever, and an arm having an engagement recess to the lever shaft portion. The bracket is provided with a pivot so that it can be rotated on the spindle and slidable in the axial direction of the spindle, and a notch that is in contact with the upper surface of the upright piece to restrict the rotation is formed in the arm. When the arm is slid so that the notch is in contact with the upper surface of the upright piece, the arm is restricted from further rotation and is held in an upright state, so the amount of rotation of the arm is ½ or less of the conventional, Since the arm does not fall to the adjacent control lever side, even if the interval between the control levers is narrow, a stopper can be provided on each control lever, which reliably prevents malfunctions when no operation is required and improves safety. be able to. Further, when the upper surface of the lever stand is inclined, the notched portion is formed on the lower side of the arm, so that the upright state of the arm is held by the weight of the plate material.
[Brief description of the drawings]
[Fig. 1] Perspective view of the stopper with the arm engaged [Fig. 2] Perspective view of the stopper with the arm upright [Fig. 3] Plan view of the lever stand [Fig. 4] Side view of the lever stand [Fig. Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lever stand, 2 ... Operation lever, 3 ... Stopper, 4 ... Bracket, 4a, 4b ... Standing piece, 5 ... Support shaft, 6 ... Arm, 6a ... Engagement recessed part, 6b ... Notch

Claims (2)

In a stopper for an operation lever of a construction machine in which an arm having an engagement recess to the lever shaft portion is provided on the side of the operation lever so as to be rotatable, a U-shape having standing pieces on both sides of the operation lever. A bracket is provided, and the arm is provided on the bracket so as to be rotatable on a support shaft and slidable in the axial direction of the support shaft. A stopper for an operation lever of a construction machine, characterized by being formed. The operation lever stopper for a construction machine according to claim 1, wherein the bracket is provided on an inclined surface, and the notch is formed on a lower side of the arm.

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