JPS5849542A - Out-rigger equipment of wheel type working machine - Google Patents

Abstract

PURPOSE:To minimize the extension of a jack cylinder above a machine by retracting the jack cylinder with respect to the upper part thereof as the supporting point into a sponson beam so as to house it inside the beam when an out- rigger is stored. CONSTITUTION:When a sponson beam is housed, a projection piece 54 of a jack cylinder and a press pin 22 contact each other just before the end of a retraction stroke of the beam 3 and the press pin 2 pushes the projection piece 54 by the final stroke thereof so that the jack cylinder 5 is swung and displaced in the inclined state for housing. When the out-rigger is used, with the sponson beam 3 extended outside the machine, the jack cylinder 5 is vertically stretched to ground a float 6. The jack cylinder 5 is vertically locked by engaging an arm 55 of a cylinder tube 51 into an engagement dent 72 in a cam member 7 which is mounted on the sponson beam 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger device installed in a wheeled working machine such as a truck crane, rough terrain crane, or wheel shovel.

As shown in FIGS. 6 to 8, this type of outrigger device is installed in two sets on both the front and rear sides of the traveling body A, in an overall H-shape arrangement, each with a fixed box fixed to the traveling body A. An overhanging beam C is extended out from B and retractably fitted thereinto, and a retractable jack cylinder E having a float D at the lower end is fixed in a vertical position at the tip of this overhanging beam C.

However, this type of conventional outrigger 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. One of these is the height of the underside of the aircraft from the ground (hereinafter referred to as the aircraft height). Therefore, the jack cylinder E of the outlier 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 jack cylinder E
The overall length of the fuselage will inevitably become longer, and the longer it will protrude upward from the fuselage. In this way, the jack cylinder protrudes above the machine for a long time, so the jack cylinder gets in the way during so-called close-range work such as piling work and loading with a truck close to the machine, making the work very inconvenient. was.

Further, in order to improve the stability of supporting the fuselage, it is desirable that the overhanging beam C extends as long as possible to the outside of the fuselage.

For this reason, when the overhang beam is retracted, the jack cylinder E
Although it is designed so that it fits completely within the legal aircraft width, in this case, the outer half of the float D attached to the lower end of the cylinder E will protrude from within the aircraft width.

Therefore, conventionally, the float D was removed every time the vehicle was driven on a public road, and this work of attaching and detaching 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 disadvantageous in terms of the stability of supporting the aircraft body.

In view of the above points, the present invention has been developed to make it possible to reduce the amount of upward protrusion of the jet cylinder while adhering to legal restrictions, and to keep the float within the width of the machine body in the retracted state. The purpose is to obtain an outrigger device for a machine, and its configuration is as follows.

The present invention is configured such that the cylinder is pivoted to the tip of the overhang beam so as to be able to swing in the left and right directions using the upper part as a fulcrum, so that the cylinder can be drawn toward the inside of the overhang beam and stored in an inclined position. In addition to this, the rocking displacement of the jack cylinder from the vertical position to the above-mentioned tilted storage position is controlled by a projecting piece extending from the upper end of the cylinder, which is fixed at the tip of the box when the beam is stored. This is done automatically by pushing outward with the
-Also, the displacement from the tilted retracted position to the vertical position is caused not only by the natural displacement due to the weight of the jack cylinder, but also by the extension of the projection on the outer surface of the jack cylinder. It is characterized by the fact that it can be forced to do something by forcing it.

Embodiments of the present invention will be described below with reference to the drawings.

1 is a traveling body frame, 2 is a fixed box fixed to the frame 1, an overhang beam is fitted into the fixed box so that the filter can be retracted, 4 is an overhang cylinder, and 5 is attached to the tip of the overhang beam 6. Jacque cylinder, 6
is a float attached to the lower end of the cylinder 5. The overhang cylinder 4 has a rond end attached to the inner surface of the distal end of the overhang beam, and a cylinder bottom attached to the inner surface of the proximal end of the fixed box 1. The expansion and contraction of the overhang cylinder 4 causes the overhang beam 6 to be attached to the fixed box 2. It can be extended and retracted.

In the jacket cylinder 5, the cylinder tube 51 is on the lower side,
The rod 52 is placed at the tip of the overhang beam 6 in the opposite position to the conventional jack cylinder, with the rod 52 facing upward, and the rod end is connected to the overhang beam B via the flat pin 56. It is pivoted to. 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 (width) direction of the aircraft with the upper part as a fulcrum, and when the outriggers are not used (when driving on public roads), the cylinder 5 is placed in a vertical position. As shown in FIG. 1, the overhanging beam 6 is constructed so that it can be pulled inward and rotated using the upper part as a fulcrum and stored in the beam filter 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 a push pin 22 is fixed in a horizontal position along the front-rear direction via a bracket 21 at a height position corresponding to the protruding piece 54 at the upper end of the fixing box 2. are doing. 23 is a collar fitted onto the push pin 22. The protruding piece 54 of the above-mentioned 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 filter when the overhanging beam is retracted, and the protruding piece 54 is pushed by the push pin 22 during the remaining stroke, and the jack cylinder 5 is configured so that it is automatically pivoted to the above-mentioned inclined storage position. 6- The abutting surface of the protruding piece 54 against the push pin 22 is shown in the figure so that a stable abutting state can be obtained. It is formed in the shape of a square.

Furthermore, the cylinder tube 5 of the jack cylinder 5
1, a convex portion 55 having a U-shaped cross section is provided on both front and rear sides from the upper end to a predetermined position at the lower part, and a roller 56 is provided at the lower end of the convex portion 55 in a state that slightly protrudes below the convex portion 55. It is rotatably installed. On the other hand, at a position below the roller 56 on both front and rear inner surfaces of the overhang beam 6,
A cam piece 7 having a cam surface 71 formed on the upper surface is integrally provided in a protruding manner. The cam surface 71 of the cam piece 7 has an inclined circular arc trajectory that moves away from the roller 56 of the jack cylinder 5 downward as the jack cylinder 5 approaches the vertical position from the tilted storage position, that is, the swing of the jack cylinder 5. It is formed along an inclined circular arc curve centered on a point 02 (shown in Fig. 4.5) located outside the fulcrum o1 in the machine width direction, and when the jack cylinder 5 is in the inclined storage position, The roller 56 is now in contact with the inner end of the cam surface 71. Note that the cam surface 71 does not have to be the above-mentioned arc-shaped curved surface, but may be a linear inclined surface along the above-mentioned inclined locus. Further, a portion of the cam piece 7 outside the cam surface 71 is formed horizontally, and an engagement recess 72 is formed in the outside portion of the cam piece. The engagement recess 72 is formed with a width that allows the protrusion 55 of the jack cylinder 5 to engage with the center line, which is a perpendicular line drawn from the swing fulcrum 01 of the jack cylinder 5. Therefore, when the cylinder 5 is vertical in the contracted position, the convex portion 55 faces above the engagement recess 72, and when the cylinder 5 is extended in this position, as shown in Fig. 2.6. The convex portion 55 descends and engages with the engagement recess 72.

Note that cutouts 24 and 31 are provided on the lower surfaces of the fixed box 2 and the distal ends of the overhanging beam filters to allow the jack cylinder 5 to swing.

The float 6 includes pins 57 protruding from both front and rear sides of the lower end of the cylinder tube of the cylinder tube 5, and a vertically long elongated hole 62 (shown in FIG. 6) provided in the float mounting seat 61.
It is pivotally connected so that it can swing from side to side.

In this configuration, when using outriggers, the second and sixth
As shown in the figure, with the overhanging beam 6 extending outward from the machine body, the jack cylinder 5 is extended in a vertical position, the float 6 is grounded to float the machine body, and various operations are performed in this state. In this case, the jack cylinder 5 is locked in the vertical position by the convex portion 55 of the cylinder tube 51 engaging with the engaging recess 72 of the cam piece 7 provided on the overhang beam B, as described above, and during work. prevents sideways shaking and falling over.

However, when retracting the outriggers from this state,
With the jack cylinder 5 contracted and the convex portion 55 disengaged from the engagement recess 72, the overhanging beam filter is pulled into the fixed box 2 and stored. In this case,
As shown in Figure 4, the overhanging beam filter fixing box 2
Immediately before the cylinder is completely retracted, the protruding piece 54 on the upper end of the jack cylinder comes into contact with the push pin 22 of the fixing box 2, and the protruding piece 54 is pushed during the stroke from this point 91 until the overhang beam B is completely retracted. By being pushed toward the outside of the fuselage by the pin 22, the jack cylinder 5 swings toward the inside of the overhanging beam filter around the pin 5, and finally the cylinder 5 moves along the imaginary line in FIGS. 1 and 4. It is stored in the overhang beam 6 in an inclined position as shown in FIG. At this time, float 6
is in close contact with the lower surface of the fixed box 2 while maintaining its horizontal position.

As described above, when using this device in which the jack cylinder 5 is stored in the overhanging ruby filter in an inclined position when the outrigger is not in use, the cylinder 5 is Because the overhang beam protrudes downward, in other words, the cylinder 5 can be made to protrude downward from the aircraft body to reduce the distance from the ground, so the required stroke of the cylinder 5 to float the aircraft is shorter than that of the conventional one. It's smaller than that.

Therefore, the overall length of the jack cylinder 5 can be reduced accordingly. Further, by allowing the cylinder 510 to protrude downward from the machine body in a vertical position, the amount by which the cylinder 5 protrudes upward from the machine body can be made smaller compared to the conventional device.

Therefore, when using this outrigger device, (a) the overall length of the jack cylinder 5 can be reduced, and (b) the cylinder 5 can be protruded downward from the fuselage due to the synergistic effect of the two points. The amount of protrusion can be significantly reduced compared to conventional devices. Therefore, there is no fear that the jack cylinder 5 will interfere with nearby work such as piling work, unlike in the past, which 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 each time when driving on public roads. In addition, by eliminating the need to attach and detach the float, there is no need to suppress the weight of the float, so the float 6 can be made as large as possible without protruding outward from the fuselage in the stored state. , which results in
It increases the stability of the aircraft support and becomes a scale.

Next, the operation of swinging and displacing the shirt pheasant link 5 from the above-mentioned inclined storage position to the vertical position will be explained. When using the outriggers, if the overhanging beam 6 is extended outward from the fuselage, the protruding piece 54 on the upper end of the jack cylinder 5 will be attached to the fixing box 2.
Since it is separated from the push pin 22 at the tip, the jack cylinder 5 is released from the lock in the tilted storage position, and from this state, the jack cylinder 5 is in principle naturally displaced to the vertical position by its own weight. However, such natural displacement to the vertical position due to its own weight is prone to malfunctions due to rust on the swinging fulcrum part of the pin 56, foreign matter getting caught, or lack of lubricating oil, and there is a problem in terms of reliability. be. Therefore, in this device, if the natural rocking displacement of the cylinder 5 to the vertical position is not performed smoothly, the cylinder 5 is configured to be forcibly displaced to the vertical position. It is something.

That is, when the jack cylinder 5 is extended in the inclined storage position, the roller 56 provided on the cylinder 5 presses the cam surface 71 of the cam piece 7. As described above, this cam surface 71 is formed along an arcuate curve centered on the point 02 on the outside of the swing fulcrum O of the gear cylinder 5, so by pressing the roller 56 against the cam surface 71, the A force acts on the Tsuki cylinder 5 in a direction toward a vertical position.

By extending the cylinder 5 to a certain length in this manner, the cylinder 5 can be forcibly swung into a vertical position as shown in FIG. Therefore, when using this device, it is possible to reliably perform the rocking displacement operation of the jack cylinder 5 from the vertical position to the tilted storage position, and vice versa. Since there is no need to add a dedicated drive source such as a hydraulic cylinder 13 for the swing displacement of 5, the structure in this respect is extremely simple and the cost is low.

By the way, the locking means for locking the jack cylinder 5 in the vertical position is not limited to the above embodiment. For example, a locking pin that can be elastically retracted is provided on both front and rear surfaces of the tip of the overhanging beam B, and this locking 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 B. You may also do so. Furthermore, in the above embodiment, the jack cylinder 5 was installed at the tip of the overhanging beam with the cylinder tube 51 facing downward.
The cylinder 5 may be installed with the cylinder tube 51 facing upward as in the conventional case. 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 in any case, oil leakage and malfunction due to this, as well as prevent the rod 52 from being attached to the cylinder 5.
4- Since the cylinder tube 51 only needs to be processed for the locking means and the like, the processing becomes easy.

On the other hand, in the above embodiment, in order to forcibly oscillate the jack cylinder 5 from the tilted storage position to the vertical position, the jack cylinder 5 side Although the rotatable roller 56 is provided, in the present invention, the jack cylinder 5
In short, a protrusion may be provided on the side, and this protrusion may of course be provided fixedly on the jack cylinder 5. Further, the specific location of this protrusion on the outer surface of the jack cylinder 5 may be changed as appropriate when implementing the present invention.

As described above, according to the present invention, when the outriggers are retracted, the jack cylinder is drawn into the overhanging beam using the upper part as a fulcrum and is stored in the beam in an inclined position, thereby making it more advantageous than conventional outrigger devices. This makes it possible to significantly reduce the amount of upward protrusion of the jack cylinder, which is very advantageous for close work such as pile driving. Also,
Since the float can be stored within the width of the machine along with the jack cylinder, there is no need to attach or detach the float every time you drive on public roads, and the float diameter can be increased to improve stability during outrigger work. It is.

Further, according to the present invention, since the swinging displacement of the above-mentioned jack cylinder can be performed by its own blade without using a special drive source dedicated to it, the structure is simple and the cost is low. Furthermore, the cylinder can be oscillated from the vertical position to the tilted retracted position by the abutting action between the protrusion extending from the upper end of the cylinder and the tip of the fixed box, and the cylinder can also be swung from the tilted retracted position to the vertical position. Dynamic displacement can be achieved not only by the natural displacement method using the cylinder's own weight, but also by the forced displacement method using protrusions provided on the outer surface of the jack cylinder and cam surfaces provided on the inner surface of the overhanging beam. The rocking displacement operation is highly reliable, and the device is highly durable.

[Brief explanation of the drawing]

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 state of use, Figure 6 is Figure 2 II
An enlarged cross-sectional view taken along the I-ITl line, Fig. 4 is a diagram for explaining the rocking displacement operation of the cylinder from the vertical position to the tilted storage position, and Fig. 5 shows the cylinder from the tilted storage position to the vertical position. FIG. 6 is a schematic side view of the entire truck crane for explaining a conventional example, FIG. 7 is a plan view of the same, and FIG. 8 is an enlarged rear view of the same. 1... Traveling body frame, 2... Fixed box, 6...
... Overhanging beam, 5... Jacket cylinder, 56.
...Pin as a swinging fulcrum of the cylinder, 54...Protrusion piece at the upper end of the cylinder, 56...Roller as a protrusion of the cylinder, 71...Cam surface, 6...Float. Patent applicant: Kobe Steel, Ltd. Representative: Patent attorney: Etsuji Kotani 17- Figure 4 Figure 5! No-

Claims (1)

[Claims] 1. A fixed box, 7x, fixed to the wheeled traveling body, an overhanging beam that overhangs this fixed box and is fitted in a retractable manner, and the tip of this overhang beam has a vertical position and a lower part inside the overhang beam. and a jack cylinder having a float at its lower end, which is pivotally mounted to be swingable in the left and right directions with the upper part as a fulcrum so as to be able to swing in a tilted storage position, and the jack cylinder has a float at its lower end. By extending a projecting piece on the upper end and pressing the projecting piece outward with the tip of the fixed box when the overhanging beam is stored,
The jack cylinder is configured to be able to swing from the vertical position to the tilted storage position, and a projection is provided on the outer surface of the jack cylinder, and a jack cylinder is provided at a position below the projection on the inner surface of the overhanging beam. An outrigger device for a wheeled working machine, characterized in that a cam surface is provided along an inclined linear trajectory that moves away from the protrusion as the outrigger moves from an inclined storage position to a vertical position.