JPS6112290Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is an outrigger attached to a worker to stably support a stationary work vehicle such as a truck crane or various civil engineering construction work vehicles. Regarding.

BACKGROUND TECHNOLOGY Stationary work vehicles such as truck cranes and various civil engineering construction work vehicles have a storage width B to tension width A on both sides of the vehicle body, as shown in Figure 1, in order to increase the stability of the vehicle body during work. It is equipped with an outrigger 1 that extends to the ground and touches the ground.
It is desirable that the foot 2 attached to the lower end of the leg 3 be as large as possible, considering that it will come into contact with soft ground.

Also, in order to increase the effectiveness of the outriggers, it is necessary to increase the tension width A as shown in Figure 1.
For this purpose, it is advantageous to increase the storage width B. However, when the outrigger 1 is retracted, there is a regulation that the outer edge width C of the foot 2 must not exceed the vehicle width specified in the safety standards, so if the foot 2 is made larger, the retracted width B must be reduced accordingly. Moreover, if the hood is large, a conflicting situation arises in that it provides support to the running of the work vehicle when not working.

In response to such demands, conventionally, the foot is supported on the leg of the outrigger so that it can swing freely around the axis in the width direction of the work vehicle, and the foot is supported on the outer side of the vehicle body (the outer side of the vehicle body) with the foot centered on the axis. The dimensions of the foot (on the front side) are made larger than those on the opposite side, thereby increasing the ground contact area of the foot as a whole.Moreover, when the foot is not in contact with the ground, the foot is raised toward the front side of the vehicle body. Japanese Utility Model Application No. 52-151507 discloses an outrigger that maintains a tilted position so that the foot does not touch the road surface while the work vehicle is not working, regardless of the condition of the road surface. has been done.

However, the prior art disclosed in the publication only states that the foot is swung only toward the front of the vehicle body (that is, the degree of freedom is 1), and the point is that the storage width in the width direction of the vehicle body is attempted to be reduced. There is no mention of this, and the issue remains unresolved.

Problems to be solved by this invention In view of the above-mentioned various demands for outriggers, this invention makes tension width A as large as possible, and also prevents storage width B from exceeding legal limit width C. The foot increases the ground contact area,
Moreover, the aim is to provide an outrigger in which the foot can swing and tilt in all directions and the degree of freedom in contact with the ground surface is not restricted.

Means to Solve the Problem In this invention, the outrigger is constructed by an outrigger outcase that is provided on both sides of the vehicle body in the width direction and has a polygonal cross-sectional shape, and is inserted into the outrigger case so as to be able to move up and down. This cylinder leg is attached to the lower end of this cylinder leg via a ball joint, and the dimension from the center of the cylinder leg to the outside in the width direction of the vehicle body is small.
A foot whose inner dimension in the width direction of the vehicle body is larger, and a lower end rotatably supported by the inner end of this foot, and a guide rod at the upper end is attached to the outer wall of one side of the out case in the width direction. and a spring mounted between the guide and the foot to press the guide rod of the guide against the outer wall of the outer case. It is something.

Function: In the outrigger of this invention, the foot is attached via a ball joint, so it can swing and tilt in any direction, and the degree of freedom in contact with the ground is not restricted. Furthermore, since the foot has a dimension G from the center of the leg to the outside of the vehicle body width that is smaller than the inside dimension H, the storage dimension B can be reduced even if the area of the foot is increased. Furthermore, a U-shaped guide is attached to the foot, and the guide rod at the upper end of the guide is pressed by a spring along the inner and outer wall surfaces of the out case with a polygonal cross section, so that the foot is perpendicular to the axis of the leg. rotates within
This prevents the wide part from protruding outward.

The details of this invention will be explained below based on the drawings showing one embodiment thereof.

In FIG. 2, reference numeral 8 indicates an outrigger outcase provided on both sides of the work vehicle in the vehicle body width direction, and the cross-sectional shape is polygonal (quadrangular in the example shown). A cylinder leg 9 is inserted into the inside so that it can move up and down. As shown in FIG. 2B, a foot 12 is attached to the lower end of the cylinder leg 9 via a ball joint 12a.
is formed into a large rectangular shape eccentrically inward in the width direction of the vehicle body from the center of the cylinder leg 9. That is, the dimension G outside the center of the cylinder leg 9 in the vehicle width direction is limited so that the width of the outer end of the foot is smaller than the vehicle width when the outrigger is retracted, while the dimension H inside the center of the cylinder leg 9 in the vehicle width direction is It is made larger than the dimension G, and the ground contact area of the foot 12 as a whole is made large.

A guide 15 formed by bending a bar into a U-shape is attached to a pair of fulcrum metal fittings 13 and 14 which are fixed to the upper surface of the inner end of the foot 12 with an interval between them.
Bend both lower ends at right angles toward the outside,
They are inserted into holes drilled in the fulcrum metal fittings 13 and 14, respectively, and are rotatably supported. A pair of tension springs 19 and 20 are installed between the legs 16 and 17 on both sides of the guide 15 and a pair of spring hooks 21 and 22 provided on the upper surface of the foot 12, respectively. The guide rod 18 at the upper end of the guide 15 is pressed into contact with the outer wall surface of the out case 8 having a polygonal cross-sectional shape along the width direction thereof facing inward of the vehicle body,
The foot 12 is prevented from rotating in a plane perpendicular to the axis of the cylinder leg 9.

When using the outrigger having the above structure, the leg consisting of the outcase 8 and the cylinder leg 9 is extended in the width direction of the vehicle body, and the cylinder leg 9 is lowered relative to the outcase 8, as in the conventional one. The foot 12 is grounded. At this time, the foot 12 is connected to the lower end of the cylinder leg 9 with a ball joint 12a, so even if the ground surface is slightly sloped or uneven, the degree of freedom of swinging and tilting is not restricted. To ensure a secure contact with the ground by following the ground, and to stably support the vehicle body by increasing the ground contact area of the foot in the width direction of the vehicle body. Further, when the outriggers are not in use, the cylinder legs 9 are raised and retracted into the outcase 8, and the outcases are drawn to both sides of the vehicle body and stored. When using and storing this outrigger, the cylinder leg 9 expands and contracts up and down inside the outcase 8, but at this time, the guide 1
The guide rod 18 of No. 5 contacts the outer case 8 along the side width direction and slides while being pressed by the tension springs 19 and 20, allowing the foot to freely rotate in a horizontal plane around the ball joint 12a. This prevents the side of the foot 12 with the larger dimension from the axis of the cylinder leg 9 from moving outward in the width direction of the vehicle body. The side with the smaller dimension is maintained on the outside in the width direction of the vehicle body, and the work vehicle can travel while maintaining the width within the specified vehicle width.

Effects As explained above, in the present invention, the foot is attached to the leg of the outrigger via a ball joint, and the foot can be swung and tilted in all directions. This has the effect of ensuring reliable grounding without restricting the degree of freedom of the state. In addition, the foot has a smaller dimension on the outside in the vehicle width direction from the center of the outrigger leg, and a larger dimension on the inside in the vehicle width direction, increasing the overall ground contact area of the foot in the vehicle width direction. The guide provided at the end is brought into elastic contact with the outer surface of the leg of the outrigger so that the larger inner side of the foot is always positioned on the inside in the width direction of the vehicle body, so the foot is In combination with the above-mentioned attachment structure to the leg, the body of the work vehicle can be stably supported with a large ground contact area. Moreover, when the outriggers are stored, the foot can always be maintained in a predetermined storage state in which the overhang in the width direction of the vehicle body is small, and the width of the work vehicle can be kept within a certain width limit. It can be made such that there is no hindrance to the running of the working vehicle during non-working hours.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the outrigger, Figure 2 shows an embodiment of this invention, Figure A is a front view of the outrigger, Figure B is a side view of the same, Figure C is a side view with the cylinder leg extended, Figure D is a view taken in the direction of arrow K in Figure A. 1... Outrigger, 8... Out case, 9
...Cylinder leg, 12...Foot, 12a...
Ball joint, 15...guide, 18...guide rod, 19...tension spring.

Claims (1)

[Scope of utility model registration request] In the outrigger of a work vehicle, the outrigger outcase is provided on both sides in the width direction of the vehicle body and has a polygonal cross-sectional shape, the cylinder leg is inserted into the outrigger so as to be vertically movable, and the lower end of the cylinder leg. A foot is attached to the cylinder leg via a ball joint, and the outside dimension in the width direction of the vehicle body from the center of the cylinder leg is small, and the dimension in the width direction of the vehicle body is large. is rotatably supported, and the guide rod at the upper end is mounted between the guide and the foot, the guide rod being in contact along the width direction of one side of the outer wall of the outcase. , and a spring pressing the guide rod of the guide against the outer wall of the outcase.