Outrigger fall prevention base

Abstract

To provide a base that is laid under an outrigger projecting from the body of a crane truck or the like, and prevents the truck from tipping over even when the moment due to the weight of a suspended load or the like becomes larger than the moment due to the weight of the vehicle body side and the truck is in an overhanging state from the ground plate of the outrigger.SOLUTION: There is provided an outrigger base characterized in that a ground plate 4a of an outrigger 4 is placed on the top surface of a base plate 1 made of a steel plate or the like, and the outrigger 4 and the base plate 1 are connected and integrated using a hanger bracket 2 and a tension rod 3, widening the contact range with the ground and expanding the allowable range of moments, making it less likely to tip over.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a base that is placed under the outriggers of a crane truck, aerial work platform, or the like. [Background technology]

[0002] When working with a crane or aerial work platform, outriggers are extended from the vehicle body to increase the contact area with the ground, preventing it from tipping over due to the moment caused by the weight of the suspended load or bucket. In addition, base plates or steel plates are laid under the outrigger grounding plates to prevent the ground or road surface from sinking or collapsing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] none [Non-patent literature]

[0004] [Non-Patent Document 1] none Summary of the Invention [Problem to be solved by the invention]

[0005] When working with cranes or aerial work platforms, outriggers are extended from the vehicle body to increase the contact area with the ground, preventing the vehicle from tipping over due to the moment caused by the weight of the load or bucket. However, there are still many accidents where the moment exceeds the allowable range during work, causing the vehicle to overhang, or the ground or asphalt surface in the area where the vehicle is in contact with the ground sinks or caves in, causing the vehicle to lose balance and tip over. Base plates or steel plates are placed under the outrigger ground plate to increase the contact area with the ground and prevent the ground or asphalt from sinking or collapsing, but these cannot prevent the vehicle from tipping over if the moment caused by the weight of the load or bucket is greater than the moment caused by the weight of the vehicle itself, and the vehicle overhangs the outrigger ground plate.

[0006] To provide a base that is used by being laid under an outrigger projecting from the body of a crane truck, aerial work vehicle or the like, and that can prevent the base from tipping over even when the moment due to the weight of a suspended load, a bucket or the like becomes larger than the moment due to the weight of the vehicle body side and the base overhangs from the ground plate of the outrigger. [Means for solving the problem]

[0007] The solution to the above problem is to place the outrigger ground plate that protrudes from the vehicle body on a base plate made of steel plate or flat steel, and to connect and integrate the outrigger and base plate using hanger brackets and tension rods, thereby preventing the vehicle from tipping over even if the outrigger ground plate overhangs. [Effects of the Invention]

[0008] By placing the contact pads of the outriggers that extend out from the vehicle body on the base plate and connecting and integrating the outriggers and base plate using hanger brackets and tension rods, the distance from the center of gravity of the vehicle body to the contact part that serves as the fulcrum that can receive the moment caused by the weight of the suspended load, etc. is increased, which makes it possible to expand the allowable range of the moment before the vehicle becomes overhanging, making it less likely to tip over and allowing for safer work. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an example in which the base of the present invention is used in a crane truck. [Figure 2]A front view of the vehicle with the crane boom extended sideways in Figure 1. [Figure 3] A side view of the vehicle with the crane boom in Figure 1 extended forward. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0010] FIG. 1 shows an example of an embodiment of the present invention. The overall structure is mainly composed of a base plate (1), a hanger bracket (2), a tension rod (3), etc.

[0011] The base plate (1) is made of steel plate, flat steel, etc., and is laid on the ground or asphalt or other road surface, and is positioned so that the ground plate (4a) of the outrigger (4) rests on it. Several holes are provided in the vertical plate at the end of the base plate (1) near the vehicle body, and two or several tension rods (3) are attached using shackles or the like, and connected to the base of the outrigger (4) extending from the vehicle body via a hanger bracket (2), thereby integrating it with the outrigger (4).

[0012] The hanger bracket (2) is made of steel or other material and has a saddle-like shape. It is placed on the outrigger (4) like a saddle, and the tension rod (3) is passed through a bearing that can swing to match the angle at which it is attached, integrating the base plate (1) with the outrigger (4).

[0013] The tension rod (3) is made of steel bars or the like, and in the unlikely event that the moment due to the weight of the suspended load or the like exceeds the allowable range during operation and the outrigger (4) overhangs the ground plate (4a), the outrigger (4) is made to bear a tensile load that balances the generated tipping moment, preventing the vehicle body from floating up. The upper end is threaded and passed through the bearing of the hanger bracket (2) and connected with a nut or the like, so that the distance between the base plate (1) and the outrigger (4) can be adjusted.

[0014] Figure 2 is a view of Figure 1 from the front of the vehicle, showing how forces act when the crane extends its boom to the right and becomes overhanging, with the ground plate (4a) of the outrigger (4) as the fulcrum. When this outrigger tip-prevention base is used on a crane truck or the like for work, if the vehicle becomes overhanging laterally with the ground plate (4a) of the outrigger (4) as the fulcrum, the tension rod (3) attached near the base of the outrigger (4) to unite the base plate (1) and the outrigger (4) applies a tensile load to the outrigger (4) that balances the tip-over moment generated with the ground plate (4a) of the outrigger (4) as the fulcrum, preventing the vehicle body from floating up.The moment due to the weight of the load, etc., now fulcrum is now greater than the moment due to the weight of the vehicle body, and tipping can be prevented until the vehicle becomes overhanging, thereby expanding the range of allowable moments due to the load, etc., of the crane truck or the like, making it less likely to tip.

[0015] Figure 3 is a side view of Figure 1, showing how forces act when the crane extends its boom forward and becomes overhanging, with the ground plate (4a) of the front outrigger (4) acting as a fulcrum. When the vehicle overhangs forward, the tension rod (3) attached diagonally near the base of the front outrigger (4) applies a tensile load to the outrigger (4) that is equal to the tipping moment generated with the ground contact plate (4a) of the front outrigger (4) as the fulcrum, preventing the vehicle body from lifting up, and the front end of the base plate (1) becomes the new fulcrum, making it less likely to tip over in the same way as in the lateral direction mentioned above.

[0016] When the vehicle is overhanging diagonally forward, both of the tension rods (3) mentioned above prevent the vehicle body from lifting up due to the tipping moment generated with the ground contact plate (4a) of the front outrigger (4) as the fulcrum, and the diagonal front end of the base plate (1) becomes the new fulcrum, similarly making it less likely to tip over. Similarly, the left and rear sides of the vehicle are also designed to be less likely to tip over using similar mechanisms. [Industrial Applicability]

[0017] This base can be used on vehicles that use outriggers for work, such as cranes and aerial work platforms, and can be attached without modifying the vehicle itself.It expands the range of allowable moments caused by the weight of suspended loads and buckets, making it less likely to tip over and allowing for safer work. [Explanation of symbols]

[0018] 1 base plate 2 hanger brackets 3 tension rods 4 Outrigger 4a Ground Plate M Overturning moment caused by overhang

Claims

[Claim 1] This base is used by placing it under the outriggers that extend from the body of a crane truck or aerial work platform vehicle, and its main components are a base plate (1) made of iron plate and flat steel, a saddle-shaped hanger bracket (2), and a tension rod (3) made of steel bars, etc. The base plate (1) is arranged so that the grounding plate (4a) of the outrigger (4) extending from the vehicle body is placed on the upper surface of the base plate (1), and two or several tension rods (3) are attached to the end of the base plate (1) on the vehicle body side in the direction in which the outrigger (4) extends and retracts, and are connected to the hanger bracket (2) placed on the outrigger (4), thereby integrating the base plate (1) and the outrigger (4). This outrigger base is characterized in that the contact area of ​​the outrigger (4) with the ground is enlarged, and the allowable range of the moment until the weight of the load suspended by the crane truck or the like causes an overhanging state is enlarged, making it difficult for the outrigger to tip over.

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