JP2547478Y2 - Bridge for construction machinery - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bridge for agricultural machines such as tractors and combines, construction machines, industrial machines and the like, and particularly to one having improved durability.

[0002]

2. Description of the Related Art Conventionally, when an agricultural or construction machine having a rubber or metal crawler or a rubber tire is transported by truck, the end of the truck bed is used. By mounting two bridges between the ground and the ground with a width of a crawler or the like separated from each other, a tractor or the like is loaded on a loading platform or unloaded using this bridge.

As the bridge, for example, for a machine having a crawler made of rubber, a long frame that is usually made of Al or an Al alloy and faces each other, and a step plate connecting these frames is spaced apart in the longitudinal direction. There is the thing of the structure which becomes. As another bridge, there is a bridge in which a plate is provided on the front surface of the upper surface of the long frame.

[0004] However, in the above-mentioned conventional bridge, a frame may be cracked due to an unbalanced load of a transporting machine (particularly, a construction machine), which shortens the life of the bridge.

[0005]

According to the present invention, as a result of various investigations, the strength of the frame portion, that is, both sides in the longitudinal direction, is large, and the present invention can be used for tires, rubber and steel crawlers. In addition, the present invention provides a bridge having a simple structure, robustness and excellent stability.

That is, the present invention is directed to a bridge made of a body made of extruded material made of Al or Al alloy and a soft elastic plate made of wood or rubber, wherein the body has a square pipe-shaped hollow portion and both sides thereof At the upper end of the surface, a hollow rib is integrally formed in the longitudinal direction and a bolt that penetrates the hollow rib up and down
Fixing the more the wood steel or rubber plate, and the hook-shaped engaging portion made of Al or an Al alloy extruded material in the longitudinal direction of the one end, pointed shape Al or the other of Al alloy extruded material Are mounted integrally with the main body.

[0007]

Next, an embodiment of the present invention will be described.

As shown in FIGS. 1 to 3, a bridge body
(1) is a shape formed by extruding an Al alloy, having a hollow portion (2) in the shape of a square pipe in the center of the cross section, and forming hollow ribs (3) continuous in the longitudinal direction at the upper end portions on both side surfaces.

FIG. 4 or FIG. 5 is attached to one end of the main body (1).
A U-shaped hook-shaped engaging portion (4) made of an extruded aluminum alloy as shown in FIG. The locking portion (4) is used to lock one end of the bridge to a truck bed or the like.
The other end of the main body (1) has a hollow shape in the shape of a square pipe.
Both side surfaces of (2) were cut so as to be larger toward the end to form a sharp end. For reinforcement, a triangular reinforcing plate (5) is fixed to the outside of both sides, and a pointed riding portion (6) made of an extruded aluminum alloy as shown in FIG. did.

In addition, a wooden plate is provided on the upper surface of the bridge body (1).
(7) bolt and nut provided through the rib (3)
Fixed with (8). Both ends of this wooden plate (7) are tapered so that crawlers and wheels can easily get on and off, and the bolts and nuts (8) are attached so that the head of the bolt does not protrude from the surface. It was recessed.

[0011] Usually, two of the above bridges are prepared,
Each locking section (4) is locked to a carrier such as a truck, and the riding section (6) is kept in contact with the ground. Then, the construction machine vehicle is unloaded from the truck bed using the two bridges extending in parallel to each other, and the vehicle is loaded on the truck bed for use.

Since the bridge of the present invention is reinforced with ribs on both sides in the longitudinal direction, the bridge is not damaged even by an eccentric load of a transported construction machine or the like. Further, since the ribs (3) reduce the vertical height of both sides of the rectangular pipe-shaped hollow portion (2) in the load direction substantially as shown in FIG. The buckling load on the two side surfaces due to the load applied to the surface increases, and the overall strength is improved.
In addition, since the rib structure increases the strength, the size of the bridge in the thickness direction can be reduced as compared with the conventional structure, and the bridge can be easily stored in a lower part of a construction machine or the like.

[0013] Further, since the boarding portion is covered with a plate, it is possible to cope with a vehicle having a low minimum ground clearance such as a forklift. Further, since an appropriate radius is provided at a position where the bridge comes into contact with the ground, it is possible to prevent the ground from being damaged. And by making all the cross-sectional structures hollow, it was possible to achieve a weight reduction of 30 to 40% compared to the conventional product.

[0014]

[Effects of the Invention] As described above, according to the present invention, the durability of the bridge can be improved, so that the life is extended,
In addition, because of its small size and light weight, it has remarkable effects such as easy handling.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a perspective view showing an example of a locking portion.

FIG. 5 is a perspective view showing another example of the locking portion.

FIG. 6 is a perspective view showing an example of a riding section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge main body 2 Hollow part 3 Hollow rib 4 U-shaped locking part 5 Triangular reinforcing plate 6 Riding part 7 Wooden board 8 Bolt / nut

Claims (1)

(57) [Scope of request for utility model registration] 1. A bridge comprising a main body formed of an extruded material made of Al or an Al alloy and a soft elastic plate made of wood or rubber, wherein the main body has a hollow portion in the shape of a square pipe, and upper end portions on both side surfaces thereof. A hollow rib is integrally formed in the longitudinal direction, and the wooden rib is formed by bolts penetrating the hollow rib vertically.
Other fixes the rubber plate, and Al or the longitudinal end
Or a hook-shaped locking part made of extruded material made of Al alloy
A bridge for a construction machine, wherein a pointed riding portion made of an extruded material made of Al or an Al alloy is integrally attached to a main body.