JPH0133407Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an outrigger device that is installed on a vehicle body such as a truck crane and that ensures the stability of the vehicle body during work.

Conventionally, the bodies of truck cranes and the like have been equipped with outrigger devices. In the case of a truck crane, this outrigger device extends a beam to the side of the vehicle body during crane operation, and extends the rod of the vertical cylinder at the tip of this beam to ground its ground plate, thereby reducing the width of the vehicle body. The stability of the vehicle body during the above-mentioned work is increased by ensuring a large amount of space.

By the way, this type of outrigger device has a restriction that it must be reliably accommodated within the width of the truck crane when it travels on the road.

However, the ground plate is rotatably connected to the lower end of the rod of the vertical cylinder via a universal joint such as a ball joint in order to ensure grounding performance regardless of how bad the ground surface is. It is something. Therefore, even if one side of the ground plate is aligned with the vehicle width line, if vibrations etc. are transmitted to the ground plate while the truck crane is running, rotational displacement will occur in this ground plate, and the corner will be aligned with the vehicle width line. There is a problem where the above constraints are not adhered to because the line is out of line.

This invention was developed based on these circumstances, and its purpose is to ensure that the ground plate is within the width line of the vehicle body when the vehicle is running on the road. An object of the present invention is to provide an outrigger device.

In other words, this invention is an outrigger device in which a beam can be stored with a vertical cylinder in a beam outer cylinder installed horizontally on the vehicle body, and a ground plate is provided at the bottom of the tip of the beam outer cylinder, opening toward the side of the vehicle body. an opening that allows storage of the vertical cylinder in a state with It is characterized by having the following.

An embodiment of this invention will be described below with reference to the drawings.

Fig. 1 shows a truck crane, in which 1 is a car body, 2 is a swivel platform on the car body 1, 3 is a telescopic boom pivotably supported on this swivel platform 2, and 4 is a hoisting cylinder of this boom 3. , 5 is a hook, and A is a suspended load. In addition, 6 indicates the driving cab of the vehicle body 1,
7 shows a crane operating cab on the swivel platform 2.

In such a truck crane, the vehicle body 1 is equipped with an outrigger device 8 according to this invention. Two of these outrigger devices 8 are provided on each side of the vehicle body 1, but since each outrigger device 8 has the same configuration, only one outrigger device 8 is provided here.
Only the configuration of the two outrigger devices 8 will be described.

As shown in FIGS. 1 and 2, the outrigger device 8 includes a beam outer cylinder 9, and the beam outer cylinder 9 is disposed laterally along the width direction of the vehicle body 1. A beam 10 is housed within the beam outer cylinder 9. This beam 10 is connected to the vehicle body 1 as shown by the imaginary line in FIG.
Beam 10 can be extended to the side.
Needless to say, the extension and storage are performed by a beam cylinder (not shown) consisting of a hydraulic cylinder.

A vertical cylinder 11 is installed at the tip of the beam 10.
is installed. This vertical cylinder 11 is also a hydraulic cylinder, and a ground plate 13 is attached to the lower end of the rod 12, and this ground plate 13 has an oval shape. Also, between the lower end of the rod 12 and the ground plate 13 is a joint 1 such as a ball joint.
4, so that the ground plate 13 is automatically movable vertically and horizontally about the lower end of the rod 12.

An opening 15 is formed at the bottom of the tip of the beam outer cylinder 9. This opening 15 is the second
As shown in FIG. 2 and FIG. 3, the opening expands toward the side of the vehicle body 1, so that when the beam 10 is housed in the beam outer cylinder 9, as shown in FIG. The vertical cylinder 11 can be housed in the beam outer cylinder 9 with the ground plate 13 attached. In other words, the opening 1
5 is set to a size that allows the joint portion 14 of the ground plate 13 to enter.

A fitting portion 16 is provided on the ground plate 13. This fitting part 16 is connected to the ground plate 1
A pair of fitting plates 16a, 16a are erected on the top surface of 3, and these fitting plates 16a, 16
a is connected to the outer peripheral surface of the joint part 14 so as to sandwich it from both sides, and the distance between them is equal to one side 13a of the ground plate 13.
It is beginning to expand towards. In addition, 1
3b indicates the other side of the ground plate 13. Therefore, when the vertical cylinder 11 is housed in the beam outer cylinder 9 in a contracted state together with the beam 10 and the ground plate 13, the fitting part 16 is inserted into the opening 15 of the beam outer cylinder 9. That is, the fitting plates 16a, 16a are fitted,
As a result, the ground plate 13 is held with one side 13a aligned with the vehicle width line X of the vehicle body 1, as shown in FIG. In this case, car body 1
The vehicle width line X coincides with the tip of the beam outer cylinder 9.

Further, in the case of this embodiment, the fitting plates 16a, 16a of the fitting portion 16 have an eight-shape shape in which the spacing thereof contracts and closes upward as shown in FIG.

Further, on the upper surface of the ground plate 13, clamping members 17, 1 are provided on both sides of the fitting plate 16.
7 is provided. These clamping members 17, 17
have a wedge shape facing in the storage direction of the beam 10 in FIG. 2, and when the ground plate 13 is stored, they are sandwiched between the lower surface of the beam outer cylinder 9 and the upper surface of the ground plate 13 as shown in FIG. It's becoming like that.

Thus, the outrigger device 8 having such a configuration extends the beam 10 to the side of the vehicle body 1 as shown by the imaginary line in FIG. 2 during crane work, and the vertical cylinder 1 at the tip of the beam 10
Extend the rod 12 of 1 and attach the ground plate 10.
By grounding the vehicle body 1, the vehicle body 1 can be supported. In addition, when storing the outrigger device 8, the rod 1 of the vertical cylinder 11
By storing the beam 10 after contracting the beam 2,
This is the retracted attitude shown by the solid line in FIG. In this retracted position, the fitting portion 16 of the ground plate 13, that is, the fitting plates 16a, 16a, are fitted into the opening 15 of the beam outer cylinder 9, so that the ground plate 13 is attached to one side 13a.
is reliably held in line with the vehicle width line X.
Therefore, when the truck crane runs on the road in this retracted position, even if the vibrations from this running are transmitted to the ground plate 13, the ground plate 1
There is no rotational displacement of the ground plate 13, so that a part of the ground plate 13 does not protrude from the vehicle width line X. As a result, a large projecting length of the ground plate 13 can be ensured, and since the ground plate 13 is oval, a large ground contact area can also be ensured, thereby improving the stability of the vehicle body 1.

Furthermore, in this embodiment, since the tip of the beam outer tube 9 is aligned with the vehicle width line X, the beam 10 can be guided to the maximum extent. That is, in other words, the overhang length of the ground plate 13 can be maximized.

Furthermore, the rod 12 of the vertical cylinder 11
When storing the ground plate 13 in a contracted state, even if the ground plate 13 is in a rotating position as shown in FIG.
The other end side of one of the fitting plates 16a of 3 comes into contact with the tip of the beam outer cylinder 9, so that the ground plate 1
3 is rotated as shown in FIG. 7, thereby fitting and guiding the fitting plates 16a, 16a of the ground plate 13 into the opening 15 of the beam outer cylinder 9. Therefore, even if the ground plate 13 has some rotational displacement, the fitting plate 1
6a, 16a automatically ground plate 13
can be stored.

Also, the fitting plate 1 of the ground plate 13 is
Since 6a and 16a are upwardly shaped in an octagonal shape, the storage procedure thereof is not restricted by the above-described restrictions. That is, once the rod 12 of the vertical cylinder 11 is slightly contracted to lift the ground plate 13, the beam 10 is stored, and then the vertical cylinder 10 is fully contracted and the fitting plates 16a, 16 of the ground plate 13 are
a can also be fitted into the opening 15 of the beam outer cylinder 9.

Furthermore, the ground plate 13 has a clamping member 1.
7 and 17, it has the advantage that vertical rotational displacement of the ground plate 13 during storage can be prevented.

Note that this invention is not limited to the above embodiment. For example, the opening 15 of the beam outer cylinder 9
The shape is not limited to that of the above embodiment, but may be simply rectangular.

It goes without saying that this invention is applicable not only to truck cranes but also to outrigger devices of other vehicle-type construction machines.

As explained above, this invention has an opening at the bottom of the tip of the beam outer cylinder, and the fitting part of the ground plate is fitted into this opening to hold the ground plate in a predetermined position. It is.
Therefore, since the ground plate can be reliably fixed during storage, the outer edge of the ground plate can be aligned with the vehicle width line, and the vehicle can be reliably accommodated within the vehicle width. In addition, the fitting portion has a guiding function that cooperates with the opening to regulate the posture of the ground plate in a predetermined direction, so that the posture of the ground plate is automatically corrected in a predetermined direction as the boom is housed. It has excellent effects such as being able to be stored and requiring no special work by the operator.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a side view of a truck crane, Fig. 2 is a partial cross-sectional view of the tip of the outrigger device, and Fig. 3 is a line taken along the line in Fig. 2. 4 is a sectional view along the arrow in FIG. 2, FIG. 5 is a sectional view taken along the line - in FIG. 3, and FIGS. 6 and 7 show the retracting process of the ground plate, respectively. It is a diagram. DESCRIPTION OF SYMBOLS 1... Vehicle body, 9... Beam outer cylinder, 10... Beam, 11... Vertical cylinder, 12... Rod, 13... Ground plate, 15... Opening, 1
6...Mating part.

Claims (1)

[Scope of utility model registration request] A beam outer cylinder installed horizontally in the width direction of the car body, a beam housed in the beam outer cylinder so as to be able to extend to the side of the car body, and a beam attached to the tip of the beam when the beam is housed. A vertical cylinder is housed in the beam outer cylinder together with the beam, a ground plate is rotatably attached to the lower end of the rod of the vertical cylinder, and a ground plate is formed at the bottom of the tip of the beam outer cylinder and faces toward the side of the vehicle body. an opening that accommodates the rod portion of the vertical cylinder from the horizontal direction when the beam is accommodated by opening; and an opening provided in the ground plate that accommodates the rod portion of the vertical cylinder in the opening; An outrigger device comprising: a fitting portion that fits into the opening from a horizontal direction to guide and regulate the attitude of the ground plate in a predetermined direction.