JPS5843848A - Outrigger apparatus for wheeled working machinery - Google Patents

Abstract

PURPOSE:To facilitate nearby works such as piling by drawing a jack cylinder toward an overhang beam being projected with a fulcrum located at the upper part in order to be stored in the beam at an inclined position. CONSTITUTION:An overhang beam 3 is projected from and filled in a fixed box 2 which is fixed on a travelling body frame 1 capable of storage thereinto, and a jack cylinder 5 is installed on the tip end of the projected beam 3 and a float 6 is equipped on the bottom end of the jack cylinder 5 when to be not used, the cylinder 5 is caused to be drawn toward and stored into the beam 3 upon rotarily moving to settle in an inclined position. A projected piece 54 is provided at the tip of a rod 52, and a push pin 22 is horizontally fixed at the upper part of the tip through a bracket 21. Thus swingingly displacing to the stored position can be automatically accomplished by the projected piece 54 with fixed box 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger device installed in wheeled working machines such as truck cranes, rough terrain cranes, and wheel shovels. This type of outrigger device is shown in FIGS. 5 to 7. As shown, two sets of left and right are installed on both the front and rear sides of the traveling body A in an H-shaped arrangement as a whole, and the overhang beams C are extended to fixed boxes B fixed to the traveling body A, and are fitted in a retractable manner. At the tip of this overhanging beam C, a telescopic cylinder E having a float D at the lower end is fixed in a vertical position.

However, this type of conventional trigger device has the following problems. That is, this type of wheel-type working machine is subject to various restrictions on the body structure due to the fact that it runs on public roads. Less than or equal to the height of the underside of the aircraft from the ground,
(referred to as aircraft height) is one of them. Therefore, ara)
The jack cylinder E of the IJ gas device requires an extension stroke that is the above body height plus a stroke for lifting the body off the ground. For this reason, the overall length of the jack cylinder E inevitably becomes long, and the amount of upward protrusion of the machine body increases accordingly. In this way, the jack cylinder protrudes for a long time above the machine body, so this jack cylinder gets in the way during so-called close-range work such as piling work or loading work with a truck close to the machine body, which is very inconvenient for the work. It became. This was the first problem.

Furthermore, in order to increase the stability i11 of supporting the fuselage, it is desirable that the overhanging beam C extends as long as possible toward the outside of the fuselage. For this reason, when the overhang beam is retracted, the Jintsuki cylinder E is designed to fit completely within the legal aircraft width. It will protrude from within the width.

Therefore, conventionally, the float D was removed one by one when driving on public roads, and this work of removing the float was extremely troublesome. Furthermore, due to the necessity of attaching and detaching the float, the float D has to be made small in order to keep the weight of the float small, which is detrimental to the stability of the aircraft support.

In view of the above points, the present invention has developed a wheel type system that can reduce the amount of upward protrusion of the jet cylinder while adhering to legal restrictions, and also allows the float to be kept within the width of the machine body in the retracted state. The purpose is to obtain an outrigger device for working machines.

In addition, Kien aims to achieve the above objectives with the simplest and most rational structure.

The characteristics of the present invention are basically that a jack cylinder is pivotally attached to the tip of an overhang beam so that it can swing in the left and right directions using the upper part as a fulcrum, and the cylinder is pulled toward the overhang beam side and tilted. The reason lies in the fact that it is configured so that it can be stored in an upright position.

Another feature of the present invention is that, assuming the above configuration,
When the overhanging beam is stored, by pushing the protruding piece extended at the upper end of the jack cylinder with the tip of the fixed box, the cylinder is automatically oscillated from the vertical position due to its own weight to the tilted storage position, and is configured so that it can be held in the same position.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

1 is a traveling body frame, 2 is a fixed box fixed to the frame 1, 6 is an overhanging beam that overhangs this fixed box 2 and is fitted in a retractable manner, 4 is an overhanging cylinder, -5
6 is a jack cylinder attached to the tip of the overhanging beam B, and 6 is a float attached to the lower end of the jack cylinder 5. The overhanging cylinder 44i is attached with its rod end on the inner surface of the distal end of the overhanging beam and the cylinder bottom on the inner surface of the proximal end of the fixing box 1, and by the expansion and contraction operation of the bag removal cylinder 4, the overhanging beam 6 is attached to the fixed box 2.
◇ The Yatsuki cylinder 5 is placed in the opposite position to the conventional Yatsuki cylinder, in which the cylinder tube 51 is on the lower side and the rod 52 is on the upper side. ', and the rod end is pivotally connected to the overhang beam 6 via a horizontal pin 5 extending in the longitudinal direction of the fuselage.

In this way, the jack cylinder 5 is attached to the tip of the overhanging beam so that it can swing in the left-right direction (width direction) of the machine using the upper part as a fulcrum, and when the outriggers are not in use (when driving on public roads), the 1. The cylinder 5 is constructed so that it can be rotated from a vertical position due to its own weight to the overhanging beam 6 side using its upper part as a fulcrum, as shown in FIG. 1, and stored in the beam 6 in an inclined position.

Also, the upper end of the jack cylinder 5, that is, the rod 5
A protruding piece 54 is provided protrudingly at the tip of the fixing box 2, and the protruding piece 54 is provided at the top of the tip of the fixing box 2.

Attach the push pin 22 to the corresponding device via the bracket 21.
is fixed horizontally along the front-rear direction.

26 is a collar fitted onto the push pin 22. The protruding piece 54 of the jack cylinder 5 and the push pin 22 come into contact with each other just before the end of the retracting stroke of the beam 6 when the overhanging beam is retracted. The projection piece 54 is pushed by the push pin 22 so that the jack cylinder 5 is automatically swung into the tilted storage position. In addition,
The contact surface of the protruding piece 540 with respect to the push pin 22 is formed in the shape of a square as shown in the figure so as to obtain a stable contact state (0). To explain the locking means, a convex portion 55 is provided on both the front and rear sides of the cylinder tube 51 of the jack cylinder 5, extending from the upper end to a predetermined position at the lower part. A guide piece 61 is fixed to the lower part of the inner surface along an arc curve centered on the swing fulcrum 56 of the jack cylinder 5, and the lower end surface of the convex portion 55 of the jack cylinder 5 is opposed to the guide piece 61. The guide piece 61 is formed with an engagement recess 62 having a width that allows the projection 55 to engage with the center line, which is a perpendicular line drawn from the swinging fulcrum 5'5 of the jack cylinder 5. When the cylinder 5 is in a vertical position, the convex portion 55 faces the upper part of the engaging concave portion 6'2, and when the cylinder 5 is extended, the convex portion 55 is exposed as shown in Fig. 2.6. Part 55
can enter and engage the engagement recess 62.

Note that cutouts 24 and 33 are provided on the lower surfaces of the fixed box 2 and the tip of the overhanging beam B to allow the swing cylinder 5 to swing. Further, 25 is a lock hole provided on the upper surface of the tip of the fixed box 2, and 34 is a lock hole provided on the upper surface of the tip of the overhanging beam B. The lock pin 7 is inserted into the double-ended lock hole 25, 34. The overhanging beam 6 is retracted and extended to lock the overhang beam 6 in the retracted state.

The float 6 is installed in the left-right direction via pins 56 protruding from both front and back sides of the lower end of the cylinder tube of the cylinder tube 5, and a vertically elongated hole 62 (shown in FIG. 6) provided in the float mounting seat 61. It is pivotably attached to the.

When using the outrigger in the car configuration, the 2.6th
As shown in the figure, with the overhang beam 6 extended outward from the aircraft body, the jet cylinder 5 is extended in a vertical position, the float 6 is grounded to float the aircraft, and various operations are performed in this state. As described above, the jack cylinder 5 is locked in the vertical position by the convex part 55 of the cylinder tube 51 engaging with the engaging recess 62 of the guide piece 61 provided on the -1 overhang beam B, and the Prevents swinging and falling sideways.

However, when retracting the outriggers from this state,
With the jack cylinder 5 contracted and the projection 55 disengaged from the engagement recess 62, the overhang beam 6 is pulled into the fixed box 2 and stored. In this case,
Immediately before the overhang beam and the beam are completely stored in the fixed box 2, the protrusion 54 at the upper end of the jack cylinder comes into contact with the push pin 22 of the fixed box 2, and the stroke from this point until the end of the overhang beam is completely retracted. The protruding piece 54 force (by being pushed toward the outside of the fuselage by the push pin 22,
The jack cylinder 5 swings into the overhang beam 6 with the pin 56 as its center, and finally the cylinder 5 is stored in the overhang beam 6 in an inclined position as shown in FIG. At this time, the float 6 is in close contact with the lower surface of the fixed box 2 while maintaining its horizontal position. It should be noted that the jack cylinder 5 is sufficiently firmly held in the tilted retracted position by the abutting action of the protruding piece 54 and the push pin 22 described above (in this embodiment, the jack cylinder 5 is Bracket 57 on the top of the cylinder tube of 5
a lock hole 58 protruding from the bracket 57;
A structure is adopted in which the jack cylinder 5 is double locked in the tilted storage position by inserting the lock pin 8 across the rotary hole 65 provided at the tip of the overhanging beam.

As mentioned above, when this outrigger device is used, the jack cylinder 5 is pulled toward the overhanging beam 6 using its upper part as a fulcrum and rotated to be stored in the beam 6 in an inclined position. When the cylinder 5 is placed in a vertical position during use, the cylinder 5 protrudes below the overhang beam 6. In other words, the cylinder 5 protrudes downward from the aircraft body to reduce the distance from the ground. Therefore, the required stroke of the cylinder 5 to float the aircraft is smaller than that of a conventional outrigger device. Therefore, the overall length of the jack cylinder can be reduced accordingly. Furthermore, by allowing the cylinder 5 to protrude downward from the machine body in a vertical position, the amount by which the cylinder 5 projects upward from the machine body can be made smaller compared to the conventional device.

Therefore, when using this outrigger device, ■ The total length of the cylinder 5 can be reduced. ◎ Due to the synergistic effect of the scales that make the cylinder 5 protrude downward from the fuselage,
This means that the amount of upward protrusion of the jack cylinder 5 can be kept much smaller than in conventional devices. Therefore, there is no fear that the jack cylinder 5 will interfere with nearby work such as piling work, which was the case in the past, and this is very useful for work.

On the other hand, when the outriggers are retracted, the float 6 is drawn to the overhang beam 6 side together with the jack cylinder 5 and completely fits under the fixed box 2. In other words, the float 6 does not protrude outward from the fuselage, which is different from the conventional device. Thus, there is no need to remove the float 6 from the jack cylinder 5 one by one when driving on public roads. In addition, since there is no need to attach or detach the float in this way, there is no need to suppress the weight of the float 6, so the float 6 can be made as large as possible without protruding outward from the fuselage in the stored state. This makes it possible to increase the stability of the aircraft support.Moreover, in this device, the swinging displacement of the jack cylinder 5 to the vertical position is performed by the cylinder's own weight,
Since the tilted storage position is achieved by the abutting action of the protruding piece 54 of the cylinder 5 and the push pin 22 of the fixed box 2, a dedicated hydraulic cylinder or the like is required for the rocking displacement of the jack cylinder 5. There is no need to provide a driving source. Therefore, the structure of this point is extremely simple, the cost is low, and no unnecessary operations are required.

Incidentally, the displacement of the jack cylinder 5 from the tilted storage position to the vertical position can be reliably carried out by the cylinder 5's own weight, but in consideration of the worst case, such as rusting of the swinging fulcrum, As shown in FIG. 4, a tension coil spring 9 is installed between the protruding piece 54 of the jacket cylinder 5 and the overhanging beam slot, and this spring 9 prevents the displacement of the shirt cylinder 5 to the vertical position due to its own weight. It may be possible to further ensure operation by assisting. Further, the locking means for locking the jack cylinder 5 in the vertical position is not limited to the above embodiment, and for example, a lock pin that can be elastically retracted is provided on both front and rear surfaces of the tip of the overhanging beam 6, and this lock pin can be inserted into the jack. It is also possible to have the lock pin automatically engage the lock hole provided on the cylinder 5 side, or manually insert the lock pin into the lock hole provided on both the jack cylinder 5 and the overhang beam 6. You may also do so. Furthermore, in the above embodiments, the cylinder 5 was installed at the tip of the overhanging beam with the cylinder tube 51 facing downward, but of course the cylinder 5 could be installed in the same position as before with the cylinder tube 51 facing upward. It may be installed. However, according to the above embodiment, since the rod 52 is hidden within the overhanging beam 6, it is possible to prevent damage to the rod 52, which is likely to occur, oil leakage and malfunction due to this, and also to prevent locking means to be added to the cylinder 5. Since the cylinder tube 51 only needs to be processed for this purpose, the processing becomes easy.

As described above, according to the present invention, when the outriggers are retracted, the jack cylinder is pulled toward the overhanging beam using the upper part as a fulcrum and is stored in the beam in an inclined position, compared to the conventional device. This makes it possible to significantly reduce the amount of upward protrusion of the jack cylinder, which is advantageous for close-up work such as pile driving.
Since it can be stored within the width of the aircraft along with the 5' Kiji cylinder, it eliminates the hassle of attaching and detaching the float every time it is driven on public roads, and the float diameter can be increased to improve stability during outrigger work. .

Further, according to the present invention, the swinging displacement of the above-mentioned jack cylinder to the inclined storage position is achieved by the abutting action between the protrusion protruding from the upper end of the cylinder and the fixed box, without using a special drive source. Since this is done automatically and the displacement from the tilted storage position to the vertical position is performed by the cylinder's own weight, the structure is simple, the cost is low, there is no need for extra operations, and there is no problem with breakdowns. It is highly durable and has no fear of damage.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of an embodiment of the present invention in a stored state;
Figure 2 is a longitudinal sectional front view of the same angle state, Figure 6 is Figure 2
1-1 [An enlarged sectional view taken along line 1, FIG. 4 is a partially enlarged longitudinal sectional front view showing another embodiment, and FIG. 5 is a schematic side view of the entire truck crane for explaining a conventional example.
FIG. 6 is a plan view of the same, and FIG. 7 is an enlarged rear view of the same. 1... Traveling body frame, 2... Fixed box, 6...
・・Extrusion beam, 5・・Jacket cylinder, 56・
...Pin as a swinging fulcrum of the cylinder, 54... Projection piece, 6... Float. Patent Yama-jin Kobe Steel Co., Ltd. Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. A fixed box fixed to a wheeled traveling body;
It comprises an overhanging beam overhanging and retractably fitted into the fixed box, and a jack cylinder having a float at the lower end attached to the tip of the overhanging beam,
The above-mentioned jack cylinder can be swung from side to side with the upper part' as a fulcrum relative to the tip of the overhang beam so that it can be oscillated between a vertical position and an inclined retracted position in which the lower part is drawn inward of the overhang beam. An outrigger device for a wheel-type working machine, characterized by being pivotally connected to. 2. A fixed box fixed to the wheeled traveling body,
An overhanging beam is fitted into the fixed box so that it can be stored and retracted, and a shirt with a float attached to the lower end of the overhanging beam has a vertical position due to its own weight, and the lower part is inside the overhanging beam. It is pivotally connected to the tip of the overhanging beam so as to be able to swing in the left and right directions using the upper part as a fulcrum, and the upper end of the jack cylinder By extending a projecting piece and pressing the projecting piece with the tip of the fixing box when the overhanging beam is stored, the jack cylinder can be oscillated from the vertical position to the inclined storage position. This is an outrigger device for wheel-type working machines.