JPH0425403Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is applicable to, for example, when the jack boxes of outrigger devices installed on the left and right sides of the body of an aerial work vehicle equipped with a boom that can be raised, extended, and rotated are extended. This invention relates to an outrigger device for an aerial work vehicle that automates the rotation and locking of a jack box.

[Prior art and its problems]

As shown in FIG. 5, the outrigger device 21 that is installed in the conventional aerial work vehicle 20 is installed at the front and back of the side of the vehicle body 22, and the outrigger device 21 is installed at the front and back of the side of the vehicle body 22, and the outrigger device 21 is installed at the front and back of the side of the vehicle body 22, and the outrigger device 21 is installed at the front and back of the side of the vehicle body 22. When performing work at height, the vehicle for work at height 20 is stopped as close to the guardrail 23 as possible so as not to obstruct other vehicles traveling.
The outrigger device 21 is configured to extend to the side. That is, as shown by the imaginary line in the figure, the outrigger beam 21a is passed above the guardrail 23, the jack post 25 is extended from the jack box 24, and the jack post 25 is brought into contact with the ground. Figure 6 a to d
As shown in Figure 2, first, the jack box 24 (in the vertical position) which is pivotally supported on the end of the outrigger beam 21a is rotated as shown in the horizontal state diagram c, then the outrigger beam 21a is extended, and then the jack box 24 (in the vertical state) is rotated as shown in the horizontal state diagram c. The jack box 24 that has been rotated is returned to its original vertical state, and the jack post 25 is finally extended to stably ground the outrigger device 21. The rotation from the vertical state to the horizontal state is performed by the outrigger beam 21.
The jack box 2 is inserted into the through holes 26a and 27a provided in the stays 26 and 27 provided on the side and upper part of the
The insertion hole 24 of the bracket 24a provided on the side of 4
The operator inserts and removes the lock pin 28 inserted through the lock pin 28 in the vertical and horizontal positions.
Jack box 2 in the state where it is removed
4 from the vertical state to the horizontal state and from the horizontal state to the vertical state.
was overhanging to a specified width and grounded. Therefore, as mentioned above, in the conventional outrigger device 21 extending out and touching the ground, the operator had to perform all the rotation operations of the jack box 24, including the insertion and removal of the lock pin 28, and the operation was very complicated. Moreover, it required considerable hard labor, was dangerous, and had extremely low work efficiency, among other problems.

[Means and actions for solving problems]

The present invention was made to solve the above problems, and an outrigger beam is arranged so as to be retractable from an outrigger box attached to an appropriate position on the vehicle body in the direction of the vehicle width, and the tip of the outrigger beam is In an outrigger device for an aerial work vehicle equipped with a jack box in which a jack post is retractably arranged, a stay having a through hole is provided at the tip of the outrigger beam, and the jack box is rotatable at the tip of the outrigger beam. A bracket is attached to the upper vehicle body side of the jack box, and when the jack box is positioned vertically on the bracket,
A stopper pin is attached that engages and disengages from a through hole provided in the stay, and moves in and out by the swinging of a connected lever, and a cylinder tube of a hydraulic cylinder is rotatably supported on the stay, and a rod tip of the hydraulic cylinder is attached. A ring provided with a free hole that engages with the pin attached to the bracket is attached to the bracket, and a projection on one side of the ring that comes into contact with the lever connected to the stopper pin and swings the lever by expansion and contraction of the hydraulic cylinder. It is configured with a section that facilitates the operation of extending the outrigger device to the ground, especially the operation of extending the outrigger device in places along roadways where guardrails are installed, and also facilitates the operation of inserting and removing the lock pin and rotating the jack box. The purpose is to automate everything, speed up and reduce work, and provide a highly safe outrigger device for an aerial work vehicle. An embodiment of an outrigger device for an aerial work vehicle according to the present invention will be described in detail based on FIG. 4.

In the figure, 1 is a vehicle for aerial work, and 2 is an outrigger device.As shown in the figure, the outrigger device 2 is installed at the front and rear of the left and right sides of the vehicle body 3, and the vehicle 1 for aerial work is moved along the roadway. When performing predetermined high-altitude work by parking along the side, the high-altitude work vehicle 1 is stopped as close to the guardrail 4 as possible so as not to interfere with other traveling vehicles, and the outrigger device 2 (in this example, the left side 2) are configured so that they stick out from the sides. That is, as shown by the imaginary line in the figure, the outrigger beam 2a of the outrigger device 2 passes above the guardrail 4 and extends the jack post 6 which is retractably arranged in the jack box 5 provided at the tip of the outrigger beam 2a. It is configured so that it is grounded.

The detailed configuration of the outrigger device 2 will be described below. That is, as shown in FIGS. 2a and 3b and 3a and 3b, the outrigger device 2 connects the outrigger beam 2a to an outrigger box 2b installed at the front and rear of the vehicle body 3 facing in the vehicle width direction. A stay 7 having a through hole 7a is vertically attached to the outer periphery of the tip of the outrigger beam 2a so as to protrude obliquely upward. At the tip of the outrigger beam 2a, the jack box 5, into which the jack post 6 is inserted so as to be retractable, is pivoted by a pivot 8 so as to be rotatable by a predetermined angle. , a bracket 10 is vertically attached to the upper vehicle body side of the jack box 5 so as to protrude outward, and is located above the center of gravity of the jack box 5.
In addition, a stopper pin 9 that engages and disengages from the through hole 7a of the stay 7 is provided so as to be retractable from the bracket 10 by swinging a lever 9a connected to the upper end of the stopper pin 9. A pivot shaft A is rotatably connected to the stay 7.
The cylinder tube of the hydraulic cylinder 11 is pivotally supported so as to be located at the end of the jack box 5, and a ring 12 with a play hole 12a is attached to the tip of the rod 11a of the hydraulic cylinder 11. The play hole 12a is engaged with the pin 10a attached to the bracket 10. One side of the ring 12 is provided with a protrusion 12b that comes into contact with the lever 9a connected to the stopper pin 9. The lever 9a is swung by a predetermined angle α according to the amount of movement of the lever 9a. As a result, the stopper pin 9 is moved in and out to engage and disengage the stopper pin 9 from the through hole 7a, and the hydraulic cylinder 1
The jack box 5 is rotated by a predetermined angle .beta. (in this embodiment, 90 degrees) with respect to the outrigger beam 2a by the expansion and contraction movement of the first rod 11a.

By the way, as shown in detail in FIGS. 3a and 3b, the stopper pin 9 provided on the bracket 10 is disposed within a cylindrical body 9b attached to the side surface of the bracket 10 by, for example, welding. Under normal conditions, the tip of the stopper pin 9 is urged toward the through hole 7a side provided in the stay 7 by a spring 9c interposed in the cylindrical body 9b, and the tip of the stopper pin 9 does not come out of the through hole 7a. The lever 9
The lever 9a is swung by the protrusion 12b of the ring 12, and the lever 9a is swung by the gap between the play hole 12a provided in the ring 12. Lever 9
By swinging and moving a substantially V-shaped slope portion 9d provided at the opening of the cylindrical body 9b, the stopper pin 9 vertically moves and sinks into the cylindrical body 9b by a predetermined amount. It's on.

Hereinafter, the operation of the outrigger device for an aerial work vehicle according to the present invention will be explained in detail with reference to FIGS. 4a and 4b.

Outrigger device 2 of aerial work vehicle 1 according to the present invention
During the work of passing the outrigger beam 2a above the guardrail 4 and extending it, the outrigger beam 2a of FIG.
As shown in FIG. 2, first, the jack box 5 which is vertically placed on the end of the outrigger beam 2a is rotated to the horizontal state as shown in the diagram d, and then the outrigger beam 2a is extended, and then the jack box 5 which has been rotated to the horizontal state is rotated. is returned to its original vertical state, and finally the jacking post 6 is extended to stably ground the outrigger device 2.

That is, when the rod 11a of the hydraulic cylinder 11 attached to the jack box 5, which is in the vertical position (see a in FIG. 2), is extended, the tip of the rod 11a moves by the amount of play provided in the play hole 12a of the ring 12. This causes the protrusion 12b on the side of the ring 12 to come into contact with the lever 9a and rotate the lever 9a upward. The lever 9a rotates while rising along the slope portion 9d of the cylindrical body 9b. and,
As the lever 9a rotates, the stopper pin 9 connected to the tip of the lever 9a also rotates,
Under normal conditions, the tip of the stopper pin 9, which protrudes toward the through hole 7a provided in the stay 7 and is fitted into the through hole 7a, retreats and comes out of the through hole 7a due to the bias of the spring 9c, and the bracket 10 and the stay 7 are connected. The engagement is released (see b in the same figure).

Since the rod 11a continues to extend even after the engagement between the bracket 10 and the stay 7 is released, the ring 12 at the tip of the rod 11a pushes the bracket 10 via the pin 10a. Therefore, the jack box 5 is rotated by an angle β (in this example, 90 degrees) about the pivot shaft 8 to be in a horizontal state (see c in the same figure).

In the above-mentioned state, the stopper pin 9 maintains the above-mentioned state because the lever 9a for retracting and protruding the stopper pin 9 is located in the middle of the slope portion 9d, as described above.

Thus, the jack box 5 is rotated to a horizontal state (see figure d), and in this state, the above-mentioned extension operation of the outrigger beam 2a is performed, and then the jack box 5 is rotated to a vertical state. be exposed. This jack box 5
The rotation from the horizontal state to the vertical state is also achieved by the contraction operation of the hydraulic cylinder 11. In this case, when the hydraulic cylinder 11 is contracted, the center of gravity of the jack box 5 is located below the pivot 8, so when the hydraulic cylinder 11 is contracted, the jack box 5 rotates due to its own weight. At this time, the pin 10 is attached to the lower end of the play hole 12a of the ring 12.
Rotate with a engaged. Therefore, lever 9
In order to maintain the state in which a is located midway on the inclined surface 9d of the cylinder body 9b, the stopper pin 9 is moved by the spring 9.
When the jack box 5 returns to the vertical state, the tip of the stopper pin 9 does not interfere with the upper edge of the stay 7, and the jack box 5 is in the state before rotation. Return to

Then, the jack box 5 returns to a completely vertical state, the through hole 7a of the stay 7 is located at the tip of the stopper pin 9, and finally the hydraulic cylinder 11
When the lever 9a is reduced by the amount of the play hole 12a, the lever 9a that is in contact with the protrusion 12b of the ring 12 is released, so the lever 9a swings downward and the stopper pin 9 is urged by the spring 9c. It is fitted into the through hole 7a of the stay 7 and locked. and,
The jack post 6 is extended from the jack box 5, and the predetermined extension of the outrigger device 2 and stable grounding operation are completed.

In addition, the outrigger device 2 extended from the above state
Since the storage of is performed by retracing all the operations that are the reverse of the above-mentioned overhang operation, detailed explanation will be omitted.

As described above, according to the present invention, the outrigger device 2
Since all the extension and retraction operations are performed automatically, all the rotation operations of the jackbox 5, including the insertion and removal of the stopper pin 9, can be performed very easily and quickly, resulting in a marked improvement in work efficiency. The work itself is extremely safe.

[Effect of idea]

As explained above in detail, the present invention is such that an outrigger beam is retractably arranged in an outrigger box attached to an appropriate position on the vehicle body facing the vehicle width direction, and a jack post is retractably installed inside the tip of the outrigger beam. In an outrigger device for an aerial work vehicle equipped with a jack box arranged, a stay having a through hole is provided at the tip of the outrigger beam, and the jack box is rotatably supported on the tip of the outrigger beam, A bracket is attached to the upper vehicle body side of the jack box, and a stopper pin is attached to the bracket, and when the jack box is placed in a vertical position, the stopper pin engages and disengages from the through hole provided in the stay, and also comes and goes by the swinging of the connected lever. Attach the
A cylinder tube of a hydraulic cylinder is rotatably supported on the stay, and a ring having a play hole that engages with a pin attached to the bracket is attached to the tip of the rod of the hydraulic cylinder.
Since the ring is provided with a protrusion on one side thereof that comes into contact with the lever connected to the stopper pin and swings the lever by the expansion and contraction of the hydraulic cylinder, the outrigger device is prevented from protruding from the ground, especially when a guardrail is provided. It is extremely easy to extend the outrigger device at locations along the roadway where the outriggers are located, and all the operations of rotating the jackbox, including inserting and removing the lock pin, can be performed automatically, which speeds up the work and makes it extremely easy to operate. This makes it possible to work at heights with high safety, and it has various excellent effects such as being able to ground the vehicle for high-altitude work as close to the guardrail as possible even if it is located along a guardrail.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an aerial work vehicle equipped with an outrigger device for an aerial work vehicle according to the present invention;
FIGS. 2a and 2b are perspective views showing the configuration of the outrigger device according to the present invention, and FIGS. 3a and 3b are explanatory views showing the peripheral mechanism of the stopper pin of the same outrigger device,
FIGS. 4a and 4b are explanatory diagrams of the operation of the same outrigger device as described above, and FIGS. 5 and 6 are explanatory diagrams showing the structure of a conventional outrigger device and its operation. 1...Aerial work vehicle, 2...Outrigger device, 2
a... Outrigger beam, 2b... Outrigger box, 3... Vehicle body, 4... Guard rail, 5...
...Jyatsuki Box, 6...Jyatsuki Post, 7
...Stay, 7a...Through hole, 8...Axis, 9...
Stopper pin, 9a... Lever, 9b... Cylindrical body, 9c... Spring, 9d... Approximately V-shaped slope portion, 10... Bracket, 10a... Pin, 11
... Hydraulic cylinder, 11a... Rod, 12...
...Ring, 12a...Free hole, 12b...Protrusion,
A...Rotation fulcrum, α...angle, β...angle.

Claims (1)

[Scope of Claim for Utility Model Registration] A jack box in which an outrigger beam is retractably arranged in an outrigger box attached to an appropriate position on the vehicle body facing the vehicle width direction, and a jack post is arranged retractably inside the tip of the outrigger beam. In the outrigger device of an aerial work vehicle equipped with a stay equipped with a stay having a through hole at the tip of the outrigger beam, the jack box is rotatably supported on the tip of the outrigger beam, and the jack box is rotatably supported at the tip of the outrigger beam. A bracket is attached to the upper vehicle body side, and a stopper pin is attached to the bracket, which engages and disengages from the through hole provided in the stay when the jack box is positioned in a vertical position, and which moves in and out by the swinging of the connected lever, A cylinder tube of a hydraulic cylinder is rotatably supported on the stay, and a ring having a play hole that engages with a pin attached to the bracket is attached to the tip of the rod of the hydraulic cylinder, and a ring is attached to one side of the ring. An outrigger device for an aerial work vehicle, characterized in that a protrusion is provided that contacts the lever connected to the stopper pin and swings the lever by expansion and contraction of the hydraulic cylinder.