JPS6137562Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an outrigger beam, in particular, a height clearance is provided between an outer cylinder and an inner cylinder, and a guide member with a height corresponding to the clearance is provided above inside the outer cylinder. This paper relates to improvements to outrigger beams.

Before moving on to the details of the present invention, the structure of such an outrigger beam will be outlined in accordance with FIG.

1 is an outer cylinder, and 2 is an inner cylinder, which is equipped with an outrigger jack 3 at its tip and is fitted into the outer cylinder 1.
4 is a guide roller pivotally supported on the lower surface of the tip of the outer cylinder 1;
is a guide member provided above inside the outer cylinder, and the inner cylinder 2 is supported by guide rollers 4 and moved in and out along the guide member 5 by a guide roller 6 provided at its rear end. . The reason why the outer cylinder is made to have a two-story structure so that the outrigger reaction force is received by the guide member 5 is to increase the rigidity by increasing the cross section of the outer cylinder 1, and to send and drain oil to the outrigger jack 3. This is to take up space for housing hoses, etc.

A conventional example of such an outrigger beam is shown in FIG. 2. Second
1 shows an outer box 1 having a rectangular cross section by welding four flat plates, and a guide member 5 is formed by welding the flat plates inside the outer cylinder 1. However, in this example, the outrigger reaction force acting on the guide member 5 is received only at the welded portion, resulting in a problem of insufficient strength. In order to solve this problem, the flat plate constituting the guide member 5 is inserted into the side wall of the outer cylinder 1 and welded thereon, as shown in Fig. 2-2, but it is necessary to weld the top and bottom of the flat plate. There is a problem that the weld line becomes longer. The one in Figures 2-3 is made by welding a cross-sectional profile to a flat plate, using the upper side of the cross-sectional profile as a guide member, and welding an L-shaped member on top of this cross-sectional profile. The joint part between the L-shaped material and the L-shaped member (arrow A in the figure) is butt welded to the rounded part, which is not only difficult to weld, but also tends to lack strength. In any case, it was not satisfactory in terms of strength or welding man-hours, but the present invention was devised in consideration of these circumstances, and it is designed to have excellent strength and reduce welding man-hours. This provides an outrigger beam that can perform

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

FIG. 3 shows a first embodiment of the present invention, in which an outer cylinder 1 with a rectangular cross section is formed by welding a cross-sectional section 11 and a flat plate 12, and an upper side wall inside the outer cylinder 1 and a flat plate 12 are welded together. The guide member 5 is welded to the top wall (c, d), and the guide member 5 is a vertical plate member 51 that receives force in the height direction using a member formed with a J-shaped cross section.
This forms a horizontal plate member 52 that comes into contact with the guide roller 6 at the rear end of the inner cylinder 2.

In FIG. 4, the structure of the outer cylinder 1 is the same as that of the first embodiment, and the guide member 5 has a vertical plate member 51 and a horizontal plate member 52.
It is butt-welded and formed into an L-shaped cross section.
These are welded to the upper part of the inside of the outer cylinder 1 (c, d).

In FIG. 5, the structure of the outer cylinder 1 is the same as that of the first embodiment, and the guide members 5 welded to the upper part of the inside of the outer cylinder 1 are U-shaped in cross section, and the vertical plate member 51 and the horizontal plate member 52.

In FIG. 6, the structure of the outer cylinder 1 is the same as that of the first embodiment, and the guide members 5 welded to the upper part of the inside of the outer cylinder 1 are rectangular in cross section, and the vertical plate member 51 and the horizontal plate member 52 are It is what forms the. Furthermore, the third
In the figures to FIG. 6, the chain line indicates the outline of the inner cylinder 2.

As shown in the examples above, the outrigger beam of the present invention is superior in terms of strength and welding time.This point will be explained in comparison with the conventional example as follows. It is.

(1) As mentioned above, the conventional example shown in Fig. 2-1 is weak in strength because it receives outrigger reaction force only at the welded part, but in the present invention, the guide member 5 itself receives outrigger reaction force (height direction Since the outrigger beam has a vertical plate member 51 that receives force (force), it is advantageous in terms of strength, and the welding line for the entire outrigger beam is short, which reduces the number of manufacturing steps.

(2) The conventional example shown in Figure 2-2 has the disadvantage that there are 6 welding points and the welding line is long, but in the present invention, there are 4 or 5 welding points and the welding line is short. This has a great advantage in terms of man-hours required for corner manufacturing.

(3) The conventional example shown in Figure 2-3 has the disadvantage that it is difficult to weld the rounded part, but in the present invention there is no butt welding of the rounded part, which is advantageous in terms of welding work and strength. be.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an outrigger beam, Fig. 2 is a sectional view of a conventional outrigger beam, Fig. 3 is a sectional view of the first embodiment of the present invention, and Fig. 4 is a sectional view of the second embodiment of the invention. Figure 5 is a sectional view of the third embodiment, and Figure 6 is a sectional view of the third embodiment.
It is a sectional view of the fourth example in the figure.

Claims (1)

[Scope of utility model registration request] An outrigger beam is formed by fitting an outer cylinder and an inner cylinder with an outrigger jack at the tip into the outer cylinder, and a height corresponding to the clearance is provided between the outer cylinder and the inner cylinder in the height direction. The guide member is provided above inside the outer cylinder, and the outer cylinder is formed by welding a shape member and a flat plate, and the guide member is provided with a vertical plate member receiving a force in the height direction and the inner member. An outrigger beam is characterized in that it consists of a horizontal plate member that comes into contact with the cylinder and is welded to the upper part of the inside of the outer cylinder.