JPS6130928Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an outrigger that ensures the stability of the vehicle body during work.

Generally, a vehicle body such as a truck crane is equipped with a plurality of outriggers on both sides, and the outriggers include an outrigger beam that can extend to the side of the vehicle body, and a vertical cylinder provided at the tip of the outrigger beam. It consists of a circular ground plate attached to the rod tip of this vertical cylinder. The outrigger with the above structure extends the outrigger beam from the car body and extends the rod of the vertical cylinder to touch the ground plate during work, thereby increasing the width of the car body and making it easier to move the car body during work. It is designed to ensure stability. In addition, when not in use, such as when driving, the vertical cylinder rod is retracted and the ground plate is raised, and the outrigger beam is stored on the vehicle body side. The ground plate can be stored on the vehicle body side.

Incidentally, the stability performance of the vehicle body in the outrigger is determined by the ground contact area of the ground plate and its protruding width. Therefore, in order to improve the above-mentioned stability performance, it is desirable to increase the extension width of the outrigger beam, that is, the extension width of the ground plate, and to make this ground plate large to ensure a large ground contact area. However, this ground plate has a restriction that it must be stored within the vehicle width dimension of the vehicle body when not in use. Therefore, in order to ensure a large overhang width and ground contact area of the ground plate within this constraint, the ground plate is conventionally formed into a polygonal or oval shape instead of a circular one, and when not in use it is The size of the ground plate was set so that the side edge of the ground plate coincided with the width line of the vehicle body.

However, the ground plate is attached to the rod of the vertical cylinder via a universal joint in order to cope with all conditions of the ground plane. Therefore, even if the side edges of the ground plate are aligned with the vehicle width line and the ground plate is stored within the vehicle width dimension, the ground plate will rotate due to vibrations during driving and will not touch the ground. A part of the plate protruded from the vehicle width dimension, and there was a problem that the ground plate could not be reliably stored and maintained within the vehicle width dimension. For this reason, in the past, the ground plate was configured to be detachable from the vertical cylinder, and removed from the vertical cylinder when not in use, but since this ground plate is heavy,
There was a problem that it was not easy to attach and detach.

This idea was devised based on these circumstances, and its purpose is to ensure a large ground contact area and overhang width of the ground plate, and also to enable the ground plate to be grounded without being removed from the vertical cylinder when not in use. To provide a ground plate fixing device for an outrigger that can reliably store and hold the plate within the vehicle width dimension.

That is, this invention provides an outrigger having a polygonal or elliptical ground plate, in which the base ends are pivoted on the cylinder side of the vertical cylinder so that they are opposed to each other, and the tips are rotated in a direction in which they approach each other. When the rod is contracted, the ground plate is inserted between these holding members and held, and the side edge, that is, the outer edge of the ground plate is held on the vehicle width line of the vehicle body by this holding. The feature is that the lever ground plate is housed within the vehicle width dimension.

An embodiment of this invention will be described below with reference to FIGS. 1 to 5.

In the figure, 1 is the body of a truck crane, and 2 and 2 are wheels of this body 1. A swivel base 3 is provided on the vehicle body 1 and is capable of rotating. This swivel table 3 is provided with a multi-stage telescopic boom 4 whose base end is pivotably supported so as to be able to raise and lower, and this boom 4 can be raised and lowered by a raising and lowering cylinder 5 consisting of a hydraulic cylinder. Also, 6 is a lifting hook,
7 is a lifting wire. Note that 8 is a working driver's seat for crane work provided on the swivel base 3, and 9 is a traveling driver's seat for the vehicle body 1.

Outriggers 10 are provided on both sides of the vehicle body 1.
... are provided, and their configurations will be explained below. Reference numeral 11 denotes an outrigger outer cylinder installed in the vehicle body 1, and an outrigger beam 12 is housed in the outrigger outer cylinder 11 so as to be able to extend to the side of the vehicle body 1. In addition, outrigger beam 1
2, the extension and storage are performed by a beam cylinder (not shown) consisting of a hydraulic cylinder. A vertical cylinder 13 made of a hydraulic cylinder is attached to the protruding tip of the outrigger beam 12. Rod 1 of this vertical cylinder 13
A polygonal, eg, square, ground plate 15 is attached to the tip of each of the four ends, and this ground plate 15 is attached via a universal joint, eg, a ball joint 16, as shown in FIG. Therefore, the ground plate 15 is rotatable in the directions indicated by arrows in FIG. 4. Furthermore, in the retracted state shown in FIGS. 2 and 3, the ground plate 15 is stored within the vehicle width dimension with one side edge, that is, the outer edge, held or aligned with the vehicle width line X of the vehicle body 1. It is set as large as possible. Then, the vertical cylinder 1
A plurality of, for example, four, holding members 17 are provided in the cylinder tube 13a of No. 3. These holding members 17... have base ends pivoted to a flange portion 18 at the lower end of the cylinder tube 13a, and are opposed to each other in pairs. In addition, two pairs of holding members 1
7, 17 and 17, 17 are opposed to each other in the same direction. The two pairs of holding members 17, 17 each hold a coil spring 1.
These coil springs 19, 19 are connected to each other by coil springs 19, 19, and these tips are urged to rotate in a direction toward each other. Also,
The tip of the holding member 17 is formed into a clamping part 17a, and the grounding plate 15 can be clamped by the clamping parts 17a. That is, the ground plate 15 is provided with an engaging flange 20 on the upper part of the connection part 19 with the ball joint 16, and when the rod 14 is contracted, the engaging flange 20 is inserted between the holding members 17. It is designed so that it can be penetrated and held. In this embodiment, the rotating biasing direction of the pair of holding members 17, 17 is set, for example, in the same direction as the extending and retracting directions of the outrigger beam 12, as shown by a in FIG. In addition, the above-mentioned engagement flange 20
is formed into a square shape similarly to the ground plate 15 described above. Therefore. As shown in FIG. 3, the two parallel sides of this engagement flange 20 are
By holding the ground plate 15 with the marks 7, one side of the ground plate 15 can be positioned and held parallel to the vehicle width line X. In addition, each holding member 1
The lower and upper surfaces of the clamping portion 17 at 7 are respectively formed into guide surfaces 21 and 22, and simply by contracting and expanding the rod 14, the rod 14 automatically moves against the biasing force of the coil springs 19 and 19. The engagement flange 20 can be inserted between the holding members 17, and the clamping can be released from between the holding members 17.

In one embodiment with such a configuration, the outrigger beam 12 is extended from the outrigger outer cylinder 11 during crane work, and the rod 14 of the vertical cylinder 13 is extended to connect the ground plate 15.
This is to ground the Thereby, the car body 1
Since the width can be increased, the stability of the vehicle body 1 during crane work can be ensured.
When not in use, such as when driving, use the above rod 1.
4, and the engaging flange 20 is attached to the holding member 1.
7, and by sandwiching the two parallel sides of the engagement flange 20 between the holding members 17, one side of the ground plate 15 is positioned parallel to the vehicle width line X. After that, when the outrigger beam 12 is stored in the outrigger outer cylinder 11, the ground plate 15 is stored within the vehicle width dimension with one side thereof aligned with the vehicle width line X. It is something. Then,
If the ground plate 15 is stored in the vehicle body 1 in this way, rotation of the ground plate 15 can be prevented by the holding members 17, so even if vibration is applied during driving, the ground plate 15
The ground plate 15 will not rotate as shown by the imaginary line in FIG. 3 and its corner will not protrude from the vehicle width line X, and the ground plate 15 can be reliably stored and maintained within the vehicle width dimension. . Further, the guide surface 2 is attached to the clamping portion 17a of the holding member 17.
1 and 22, it is easy to clamp and release the engaging flange 20, that is, the ground plate 15, and there is no need to remove the ground plate 15 from the vertical cylinder 13 when not in use, unlike in the conventional case. , the ground plate 15 can be easily stored. Further, since the ground plate 15 is formed in a square shape, and one side of the ground plate coincides with the vehicle width line X in the retracted state, the ground contact area and the overhang width of the ground plate 15 are secured to be larger than those of conventional circular ones. Therefore, the stability performance of the vehicle body 1 is high. Further, according to this embodiment, since the engaging flange 20 is engaged with and held by the clamping portions 17a of the holding members 17, the ground plate is prevented from being damaged due to oil leakage from the cylinder tube 13a. It also has the advantage of being able to prevent the drop of 15.

Note that this invention is not limited to the above embodiment. For example, as shown in FIGS. 6 and 7, in a case-housed vertical cylinder 25 in which the cylinder tube 13a and the rod 14 are housed in box-shaped cases 23 and 24, the holding members 17 are attached to the case 23. It can be placed at the bottom end. In addition, in this case, these holding members 17
... are each provided with a coil spring 20, and are adapted to be independently biased to rotate. Also,
The polygonal ground plate is not limited to the square shape.
It may also be a rectangular ground plate 15a as shown in the figure. In addition, a rectangular ground plate 15
When using the ground plate 15a, the long side thereof may be aligned with the vehicle width line X, and the ground plate 15a may be stored and held. In addition, the ground plate is not limited to a quadrilateral shape such as a square or a rectangle.
A ground plate 15, such as a hexagonal one, as shown in the figure.
a, in which case the ground plate 1
Either the side edge of the ground plate 15a, that is, one side, is held on the vehicle width line X as shown in FIG. It may be stored so that it is held in Further, the ground plate is not limited to a polygonal shape, but may be an oval ground plate 15c as shown in FIG. 10. Further, the number of holding members is not limited to four, but may be three, with one holding member on one side. Further, in the above embodiment, the outriggers of a truck crane have been described, but the present invention is applicable not only to truck cranes but also to outriggers of vehicle-type excavators and the like.

As explained above, this invention is an outrigger having a polygonal or elliptical ground plate, in which the proximal ends are pivoted on the cylinder side of the vertical cylinder and are opposed to each other, and the distal ends are rotated in a direction toward each other. A plurality of dynamically biased holding members are provided, and when the rod is contracted, the ground plate enters between these holding members and is clamped, and the side edge of the ground plate is held on the vehicle width line of the vehicle body by the clamping. The feature is that this ground plate is housed within the width of the vehicle. Therefore, when the ground plate is stored, rotation of the ground plate is prevented by being held by the holding member, so that a part of the ground plate may be moved away from the vehicle width line due to vibrations during driving. It does not protrude and the ground plate can be reliably stored within the vehicle width dimension. In addition, since the ground plate is formed in a polygonal or elliptical shape, the ground contact area and extension width of the ground plate can be secured to be larger than that of a conventional circular ground plate, and the stability of the vehicle body is high. In addition, since there is no need to remove the ground plate from the vertical cylinder during storage, it is easy to store the ground plate, which provides various excellent effects.

[Brief explanation of drawings]

1 to 5 show one embodiment of this invention. FIG. 1 is a side view of a truck crane. FIG.
The figure shows a side view of the outrigger, and FIG. 3 shows the - in FIG.
Fig. 4 is an enlarged view of the central portion of Fig. 2, and Fig. 5 is a side view seen from the direction of Fig. 4. Figs. 6 to 10 show another embodiment of the present invention, Fig. 6 is a sectional view of a vertical cylinder, Fig. 7 is a sectional view taken along the line - in Fig. 6, and Figs. 8 to 10 are plan views of the ground plate. 1 ... vehicle body, 12 ... outrigger beam, 13
... Vertical cylinder, 14 ... Rod, 1
5, 15a, 15b, 15c...ground plate,
16...ball joint (universal joint), 17...retaining member, X...vehicle width line.

Claims (1)

[Scope of utility model registration request] An outrigger beam that extends to the side of the vehicle body during work and is stored on the vehicle body side when not in use, a vertical cylinder installed at the projecting tip of this outrigger beam, and a universal joint attached to the rod tip of this vertical cylinder. In the outrigger, the outrigger is configured with a polygonal or oval grounding plate that is attached to the ground plate and is grounded by the extension of the rod during work, and is stored on the vehicle body side when the outrigger beam is stored when not in use. The vertical cylinder includes a plurality of holding members whose proximal ends are pivotally supported on the cylinder side, are opposed to each other, and whose distal ends are rotatably biased in a direction toward each other, and when the rod is contracted, the ground plate is held in place. A ground plate of an outrigger, characterized in that the ground plate is inserted between holding members and held, and by this holding, the side edge of the ground plate is held on the vehicle width line of the vehicle body, and the ground plate is stored within the vehicle width dimension. Fixation device.