JPH0159935B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger that ensures stability of a 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 outrigger consists of an outrigger beam that can extend out to the side of the vehicle body, and a vertical cylinder installed 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 to raise the ground plate, and the outrigger beam is retracted toward the vehicle body. 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 these constraints, the ground plate is conventionally formed into a polygonal or oval shape instead of a circular one, and it is also possible to 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 contact plate is attached to the rod of the vertical cylinder via a universal joint in order to accommodate 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 protrudes from the vehicle width line above,
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 removable from the vertical cylinder, and removed from the vertical cylinder when not in use, but since this ground plate is heavy, it is difficult to attach or remove it. There was a problem that made it impossible to do it easily.

This invention was made based on the above circumstances, and its purpose is to ensure a large ground contact area and extension width of the ground plate, and also to allow the ground plate to be removed from the vertical cylinder when not in use. To provide a ground plate fixing device for an outrigger that can be reliably stored within a vehicle width dimension.

That is, in an outrigger equipped with a polygonal or oval ground plate, the vertical cylinder has a plurality of tapered rods on the cylinder side and the ground plate side, respectively, which are engaged with each other by contraction of the rod when not in use. The engaging protrusions are provided along the circumferential direction, and the engagement of these engaging protrusions holds the side edge, that is, the outer edge, of the ground plate in a posture along the vehicle width line of the vehicle body, and the ground plate is stored within the vehicle width dimension. It is characterized by this.

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

In the figure, 1 is the vehicle body of a truck crane, and 2 and 2 are wheels of this vehicle 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. Moreover, 6 is a vertical cylinder wire from lifting. In addition, 8 is the swivel base 3
Work operator's seat for crane work provided above, 9
is the driving seat of 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
The extension and storage of 2 is 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. In addition, in the stored state shown in FIGS. 2 and 3, the ground plate 15 can be stored within the vehicle width dimension with its side edge, that is, the outer edge, held or aligned with the vehicle width line X of the vehicle body 1. The size is set. Engaging protrusions 17..., 18... are provided on the ground plate 15 side and the cylinder tube 13a side of the vertical cylinder 13, respectively. The engaging protrusions 17 on the ground plate 15 side are composed of triangular protrusions formed by forming triangular sides on both sides of a right angle plate, and these engaging protrusions 17... are the ball joints 16 on the ground plate 15.
They are arranged on the upper surface 19 of the connecting portion with the two sides so that each side forms a corner of a square. Also, the engaging protrusion 1 on the cylinder tube 13a side
8 are formed of triangular plates respectively arranged on the lower surface of the cylinder tube 13a, and when the rod is contracted, these engaging protrusions 18 are guided to enter between the engaging protrusions 17... so that they mesh with each other. It's summery. That is, the engaging protrusions 18 are arranged on the lower surface of the cylinder tube 13a so that they constitute each side of the square. In this embodiment, each side of the square formed by the engaging protrusions 17 is parallel to each side of the ground plate 15, and one of the engaging protrusions 18 is connected to the vehicle. It is arranged parallel to the width line X, that is, perpendicular to the extending and contracting direction a of the outrigger beam 12 shown in FIG. Therefore, when the engaging protrusions 17..., 18... are engaged with each other, one side of the ground plate 15 can be positioned and held parallel to the vehicle width line X.

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 With this, 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 to contract the engaging protrusions 17..., 18... and engage the outrigger beams 12 with each other.
are stored in the outrigger outer cylinder 11 and the ground plate 15 is stored on the vehicle body 1 side. At this time, one side of the ground plate 15 is It is positioned parallel to the vehicle width line X. Therefore,
Thereafter, when the outrigger beam 12 is stored, the ground plate 15 is stored on the vehicle body 1 side, so that one side of the ground plate 15 is aligned with the vehicle width line X as shown in FIG. It is held and stored within the vehicle width dimension of the vehicle body 1. Therefore, even when vibrations are applied during driving, the ground plate 15 rotates as shown by the imaginary line in FIG. Rather than,
The ground plate 15 can be reliably stored within the vehicle width dimension. In addition, the above-mentioned interlocking protrusion 1
7..., 18... are constructed in triangular shapes that engage with each other, so that by simply contracting the rod 14, they can automatically engage with each other and position the ground plate 15. Since there is no need to remove the ground plate 15 from the vertical cylinder 13, the ground plate 15 can be easily stored.

Furthermore, since the ground plate 15 is formed into 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 the conventional circular one. Therefore, the stability performance of the vehicle body 1 is high.

Note that the present invention is not limited to the above embodiment. For example, as shown in FIG. 6, the engaging protrusions 18 may be provided on the ground plate 15 side, and the engaging protrusions 17 may be provided on the cylinder tube 13a side. In addition, if the four sides of the ground plate 15 are shaved to form an octagonal shape as shown in FIG. Therefore, even if the ground plate 15 rotates, the corners of the ground plate 15 will not protrude from the vehicle width line X. Further, in this case, the side edges of the ground plate 15 are held and stored on the vehicle width line X at the corners. Further, the ground plate is not limited to a square one, but may be a rectangular ground plate 15a as shown in FIG. are each composed of a pair of engaging protrusions 17a..., 18a..., and the long side of the ground plate 15a is aligned with the vehicle width line X to store and hold the ground plate 15a. Furthermore, as shown in FIG. 9, the engaging protrusions 17b..., 18b... may be formed from magnetic wire, and when engaged, these engaging protrusions 17b..., 18b... may be attracted by magnetic force. With this configuration, the rod 14 expands due to oil leakage from the cylinder tube 13a, and the engaging protrusions 17b..., 1 extend as the ground plate 15 descends.
8b... can be prevented from disengaging. Furthermore, such effects can also be achieved with the configurations shown in FIGS. 10 to 12.
That is, in this case, hooking members 20 for hooking the grounding plate 15 are provided between the cylinder tube 13a and the grounding plate 15, and these hooking members 2
0... by helical springs 21... in the hooking direction.

Further, as shown in FIG. 11, the engaging protrusions 17c..., 18c... may be arranged in a circular manner. Furthermore, as shown in FIG. 13, the cylinder tube 13a and the rod 1
In the cover-accommodating vertical cylinder 24 in which the cylinders 4 and 4 are housed in box-shaped covers 22 and 23, respectively,
The engaging protrusions 17b..., 18b... may be provided on the lower part of the cover 22 and on the plate surface 25 of the ground plate 15, respectively. Further, as shown in FIG. 7, the polygonal ground plate 30 is not limited to a quadrilateral shape such as a square or a rectangle, but may be a hexagonal ground plate 30 as shown in FIG. 14. However, as shown in FIG. 15, it may be an oval ground plate 31. And this oval shaped ground plate 31
In this case, the side edge is at the vehicle width line
It is only necessary to store the vehicle so that the vehicle width center line Y is parallel to the vehicle width line X. Furthermore, in the above embodiment, the outriggers of a truck crane have been described, but the invention is not limited to truck cranes, but can also be applied to outriggers of vehicle-type excavators and the like.

As explained above, the present invention provides an outrigger equipped with a polygonal or elliptical ground plate, in which tapers are provided on the cylinder side of a vertical cylinder and on the ground plate side, respectively, so that the rods engage with each other by contraction of the rods when not in use. A plurality of shaped engaging protrusions are provided in the circumferential direction, and the engagement of these engaging protrusions holds the side edge of the ground plate in a posture along the vehicle width line of the vehicle body, and the ground plate is stored within the vehicle width dimension. It is characterized by what it did. Therefore, when the ground plate is retracted, the rotation of the ground plate can be prevented by the engagement of the respective meshing protrusions, so that a part of the ground plate may be prevented from rotating due to vibrations such as when driving. This ground plate can be reliably stored and maintained within the vehicle width dimension without protruding from the vehicle width line.
Furthermore, since the ground plate is formed in a polygonal or elliptical shape, the ground contact area and the extension width of the ground plate can be secured to be larger than that of conventional circular ones, and the stability of the vehicle body is high. Furthermore, since there is no need to remove the ground plate from the vertical cylinder during storage, the storage becomes easy. Furthermore, since a plurality of interlocking protrusions provided on the cylinder side and the ground plate side are formed circumferentially, they interlock at multiple points circumferentially, and mechanical engagement is prevented. It is both strong and reliable, with little chance of rattling while driving, and when engaged, the ground plate remains perpendicular to the cylinder rod, so there is no need for it to tilt, and the ground plate does not protrude from the width of the vehicle. It has various excellent effects such as maintaining a stable posture.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, with Figure 1 being a side view of the truck crane, Figure 2 being a side view of the outrigger, and Figure 3 being a sectional view taken along the line - in Figure 2. , FIG. 4 is a perspective view showing a part of the vertical cylinder, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. 6 to 15 show other embodiments of the present invention, in which FIG. 6 is a plan view of the connecting portion in the ground plate, FIGS. 7 and 8 are plan views of the ground plate, and FIG. 10 to 12 show the configuration of the vertical cylinder equipped with a hook member, FIG. 10 is a side view of the vertical cylinder showing the main parts, FIG. 11 is a plan view of the connection, and FIG. Fig. 12 is a plan view of the vertical cylinder, Fig. 13 is a side view showing the cover-accommodating vertical cylinder, and Fig. 14 is a side view showing the vertical cylinder with a cover.
Figures 1 and 15 are plan views of the ground plate, respectively. 1...Car body, 12...Outrigger beam, 13
... Vertical cylinder, 13a ... Cylinder tube, 14 ... Rod, 15, 15a, 30, 31
...Ground plate, 16...Ball joint (universal joint),
17, 17a, 17b, 17c, 17d, 18,
18a, 18b, 18c, 18d...meshing projections,
X... Vehicle width line, Y... Width center line.

Claims (1)

[Scope of Claims] 1. An outrigger beam that extends to the side of the vehicle body during operation and is stored on the vehicle body side when not in use, a vertical cylinder provided at the projecting tip of the outrigger beam, and a vertical cylinder provided at the extending end of the outrigger beam. A polygonal or oval grounding plate is attached to the tip of the rod via a universal joint, 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. In this outrigger, a plurality of tapered engaging protrusions that engage with each other as the rod contracts when not in use are provided in the circumferential direction on the cylinder side and ground plate side of the vertical cylinder, respectively, and these protrusions are provided in the circumferential direction. A ground plate fixing device for an outrigger, characterized in that the side edge of the ground plate is held in a posture along the vehicle width line of the vehicle body by engagement of the engagement protrusions, and the ground plate is stored within the vehicle width dimension.