JPH08142812A - Outrigger device for work vehicle - Google Patents

Abstract

PURPOSE: To provide an outrigger device for a work vehicle whose flexibility as the work vehicle can be improved by combining the advantages of a X type outrigger device and a H type outrigger device. CONSTITUTION: In an outrigger device X for a work vehicle formed by providing a first outrigger 10 which is mounted to be overhung in one side direction of the vehicle body 2 of the work vehicle against the vehicle body 2 and a second outrigger 20 which is mounted to be overhung in the other side direction thereof, the first outrigger 10 is made in such a structure that the base end part of an extending/shrinking girder 17 whose end part is provided with an earth plate 14 is swingably pivoted in a vertical direction against a vehicle body, and a jack cylinder 16 which swingably drives the extending/shrinking girder 17 is arranged. The second outrigger 20 is formed in such a structure that a jack cylinder 23 is attached, toward a vertical direction, in the end part of an extending/shrinking girder 25 which is fixedly arranged so as to be capable of being extended/shrunk in the side direction of the vehicle body 2 against the vehicle body 2, and an earth plate 24 is mounted at the lower end of the jack cylinder 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outrigger device which is mounted on a work vehicle such as a crane truck to ensure stability during work.

[0002]

2. Description of the Related Art As the structure of an outrigger mounted on a work vehicle, the following two structures are conventionally known. One of them is that the base end of a telescopic girder equipped with a ground plate at its tip is pivotally supported vertically with respect to the vehicle body, and this telescopic girder is obliquely extended from the vehicle body by a jack cylinder. Thus, the outrigger device in which the outriggers of the structure are levitationally supported, and the outriggers of such a structure are respectively arranged on the left and right sides of the vehicle body, the pair of telescopic girders have a substantially X-shaped configuration when the outriggers are extended. It is generally called an X-type outrigger device because it exhibits

The other is a jack cylinder having a ground plate attached to the lower end of the jack cylinder at the lower end of the telescopic girder, which is fixed laterally so as to be able to expand and contract laterally with respect to the vehicle body. The outrigger device having a structure in which the vehicle body is levitationally supported by grounding the ground plate by the jack cylinder and the outriggers of such a structure are arranged so as to be able to project to the left and right sides of the vehicle body. In the extended state of the outriggers, the pair of telescopic girders and the jack cylinders respectively provided to the telescopic girders have a substantially H-shaped form, and thus are generally called H-shaped outrigger devices.

[0004]

The X-type outrigger device and the H-type outrigger device each have the following advantages and disadvantages.

That is, since the X-type outrigger device has a structure in which the telescopic girder is extended obliquely from the vehicle body to the side thereof,
Even if there is an obstacle on the side of the installation location of the work vehicle, there is an advantage that the telescopic girder can be extended around the lower side of the obstacle in some cases. On the other hand, in the retracted state of the outrigger, the grounding plate is drawn into the end of the telescopic girder as the telescopic girder is contracted, and the grounding plate is held upright so as to cover the end of the telescopic girder. To be done. For this reason, when installing the outrigger, it is necessary to extend the telescopic girder a little and lay it down from the state where the ground plate is standing upright.Therefore, without extending the telescopic girder, this should be slanted by the jack cylinder as it is. There is a drawback in that it is not possible to perform so-called "on-the-spot installation" in which the installation is overhanging.

Further, since the H-type outrigger device has a structure in which a telescopic girder having a jack cylinder fixed in the up-down direction at the tip of the H-type outrigger device is projected from the vehicle body to the side thereof as it is, the work vehicle is installed at the side of the installation place. If there is an obstacle at the position, the jack cylinder may interfere with the obstacle and it may be difficult to project the obstacle. On the other hand, the jack cylinder is placed vertically on the tip of the telescopic girder as it is in the up-and-down position when the outrigger is overhanging and retracted.
Is possible.

That is, the X-type outrigger device and the H-type outrigger device have characteristics of conflicting advantages and disadvantages. Therefore, for example, a case is assumed in which a work vehicle is stopped on a roadway where a guardrail is installed between the roadway and the sidewalk, and an outrigger is extended here to perform a predetermined work toward the sidewalk. Then, the outriggers that project on the sidewalk must be able to project them without interfering with the guardrail, and the outriggers that project on the side of the roadway should be as wide as possible so as not to obstruct the passage of other vehicles. It is required to be small.

Under such working conditions, when using a work vehicle equipped with an X-type outrigger device that projects a pair of left and right outriggers at an angle, the outriggers project on the sidewalk while avoiding interference with the guardrail. Although it can be grounded, the outriggers on the roadside cannot be “installed on the spot”, so they overhang the roadway relatively large and obstruct the passage of other vehicles.

On the other hand, when using a work vehicle equipped with an H-shaped outrigger device in which a pair of left and right outriggers are laterally extended as they are, the outriggers on the roadside can be "installed on the spot". Although the width of the vehicle from the side to the roadway side is small and does not interfere with other vehicles, in the outrigger on the sidewalk side, the jack cylinder may interfere with the guardrail to prevent the vehicle from overhanging.

That is, under such working conditions,
Both the work vehicle equipped with the X-type outrigger device and the work vehicle equipped with the H-type outrigger device are difficult to work under proper installation conditions, and there is room for improvement in terms of their versatility.

Therefore, the present invention provides an X-type outrigger device and an H-type outrigger device.
The outrigger device for a work vehicle is designed not to provide a versatility improvement by combining the advantages with the type outrigger device.

[0012]

According to the present invention, as a concrete means for solving such a problem, a first outrigger mounted to a vehicle body of a work vehicle so as to project to one side of the vehicle body and another side thereof to the other side. In a work vehicle outrigger device comprising a second outrigger mounted so as to be able to extend, the first outrigger of the pair of outriggers has a base end portion of a telescopic girder having a ground plate at a tip end thereof. A jack cylinder that pivotally supports the vehicle body in a vertical direction and swingably drives the telescopic girder, and the second outrigger is fixed to the vehicle body so that the second outrigger can be laterally extended and contracted. The structure is characterized in that a jack cylinder is attached to the tip of the telescopic girder arranged vertically, and a ground plate is attached to the lower end of the jack cylinder.

[0013]

According to the present invention, the following actions and effects can be obtained with such a configuration. That is, in the case where the installation space of the work vehicle is sufficiently secured and the outriggers can be sufficiently extended to the left and right sides of the work vehicle to be grounded, the first outriggers project the diagonally from the vehicle body, and The second outrigger extends laterally from the vehicle body, and the work vehicle can be stably levitated and supported by each of these outriggers so that required work can be performed safely.

On the other hand, for example, there is no space for installing the work vehicle in the work place, and the work vehicle must be installed on the road without stopping, and therefore, one side of the work vehicle must have a guard rail or the like. The outriggers need to be extended through the underside of the work vehicle, and the outrigger extension width must be minimized on the other side of the work vehicle so as not to obstruct the passage of other vehicles. Under working conditions, the work vehicle is stopped at the end of the roadway so that the first outrigger overhangs on the sidewalk, and in this state, the first outrigger is first placed between the roadway and the sidewalk. It extends through the underside of the guardrail and is grounded on the sidewalk, and the second outrigger extends the jack cylinder in the retracted state with its telescopic girder reduced to “in place”. And ". By adopting such an outrigger overhanging method, on the working position side (that is, the sidewalk side), the first outrigger that largely overhangs ensures sufficient stability and secures safe work, and on the anti-working position side (that is, the roadside). On the side), the overhanging width of the second outrigger is minimized, so that it is possible to prevent as much as possible from obstructing the passage of other vehicles passing along the road.

Therefore, according to the outrigger device for a working vehicle of the present invention, the first outriggers forming the so-called X-type outrigger device and the second outriggers forming the H-type outrigger device are arranged side by side, and the outriggers of these outriggers are juxtaposed. By selecting appropriately according to the installation conditions of the work vehicle, it becomes possible to perform the required work safely and accurately under all installation conditions, and the versatility of the work vehicle is improved accordingly.
By extension, the product value of the work vehicle can be expected to improve.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outrigger device for a working vehicle according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a crane vehicle Z as a working vehicle equipped with an outrigger device X according to an embodiment of the present invention. It is shown. This mobile crane Z
Mounts the crane device Y having the boom 4 on the swivel base 3 mounted on the pair of left and right chassis 2 and 2 of the vehicle 1 while the front and rear ends of the chassis 2 and 2 are mounted. Outrigger devices X, which will be described later, are attached to the front and rear positions on the end side, respectively. In FIG. 1, the chassis 2,
2 shows only the outrigger device X attached to the rear end side of the chassis 2, and the illustration of the outrigger device X attached to the front end sides of the chassis 2 and 2 is omitted. However, since both of them have the same structure, In the following, the structure of the outrigger device X will be described taking the outrigger device X mounted on the rear end side of the chassis 2 and 2 as an example.

The outrigger device X is composed of two outriggers, a first outrigger 10 and a second outrigger 20, which will be described later.

First Outrigger 10 The first outrigger 10 extends to the left side of the vehicle 1 and has the same structure as the outrigger which constitutes the conventional X-type outrigger device. That is, the first outrigger 10 is an expandable / contractible girder 17 including an outer girder member 11 and an inner girder member 12 which is internally arranged in the outer girder member 11 so as to be expandable and contractible.
It has.

The outer girder member 11 has one end 11a located near the chassis 2 on the right side of the vehicle body, and the other end 11b located near the chassis 2 on the left side of the vehicle body, and the one end 1
1a is pivotally supported on the right chassis 2 through a pivot pin 15 so as to be vertically swingable. Further, a jack cylinder 16 which is vertically attached to the left chassis 2 is connected to the other end 11b side of the outer girder member 11, and the jack cylinder 16 is expanded and contracted as the jack cylinder 16 expands and contracts. The extendable / contractible girder 17 can be vertically swung about the pivot pin 15.
Further, the inner girder member 12 has a tip 12a to which a grounding plate 14 is swingably connected via a pivot pin 13, and is internally mounted in the outer girder member 11 so as to be able to advance from the other end 11b side. ing. The expandable / contractible girder 17 composed of the outer girder member 11 and the inner girder member 12 is driven to expand or contract in accordance with the expansion / contraction motion of an overhanging cylinder (not shown) arranged in the expandable / contractible girder 17.

The first outrigger 10 thus constructed
At the time of its extension, the extension girder 17 is extended as shown by the solid line in FIG. 1, and the extension girder 17 is rotated downward by the jack cylinder 16 about the pivot pin 15. As a result, the expandable / contractible girder 17 extends obliquely from the right chassis 2 side toward the left side of the vehicle body, and the ground plate 14 comes into contact with the ground to support the vehicle 1 in a floating manner (extended state). Also, this first outrigger 1
0 indicates that the jack cylinder 1
By contracting 6 to pull up the telescopic girder 17 to the chassis 2 side and also contracting the telescopic girder 17, the retracted state as shown by the chain line in FIG.

The ground plate 14 is substantially horizontal in the plane direction due to its own weight when the expandable / contractible girder 17 is in the extended state (that is, the extended state) as shown by the solid line in FIG. As described above, the inner girder member 12 is supported by being suspended from the pivot pin 13, but when the retractable girder 17 in which the inner girder member 12 is housed in the outer girder member 11 is in the most contracted state, as shown by the chain line in FIG. At the same time, when the pivot pin 13 is pulled into the outer girder member 11, the ground plate 14 stands vertically so as to close the other end 11b of the outer girder member 11. Therefore, as described above, in the first outrigger 10, when it is extended from the retracted state, it is necessary to extend the telescopic girder 17 from the standing posture of the grounding plate 14 to the hanging state. For this reason, the first outrigger 10 cannot be so-called “installed on the spot”.

Second Outrigger 20 The second outrigger 20 extends to the right side of the vehicle 1 and has the same structure as the outrigger forming the conventional H-type outrigger device. That is, the second outrigger 20 is arranged in the vehicle width direction across the pair of left and right chassis 2 and 2 and is fixed to the pair of chassis 2 and 2, and the outer girder member 21. An expandable girder 25 including an inner girder member 22 that is internally arranged so as to expand and contract from the one end 21a side corresponding to the right chassis 2 is provided therein.
The expandable / contractible girder 25 is extended or contracted by expansion / contraction of an expandable / contractible cylinder (not shown) disposed internally. A jack cylinder 23 having a ground plate 24 at its lower end is fixed to the tip 22a of the inner girder member 22 in the vertical direction.

Therefore, the second outrigger 20 is brought into the retracted state by contracting the telescopic girder 25, contracting the jack cylinder 23, and pulling the ground plate 24 upward. Further, the jack cylinder 23 is extended and the ground plate 24 is grounded to bring it into an extended state. The amount of the extension is defined by the extension amount of the telescopic girder 25. That is, as shown by the solid line in the figure, the jack cylinder 23 is extended and the ground plate 24 is grounded while the telescopic girder 25 is in the most contracted state. With the maximum extension, the jack cylinder 23 is extended and the ground plate 24 is grounded, and the extension amount can be arbitrarily selected during the "maximum extension installation".

The chassis 2, 2 of the vehicle 1 are as described above.
The outrigger devices X and X having the above-described structure are respectively provided on the front and rear sides of the vehicle. In that case, the structure of the pair of front and rear outrigger devices X and X and the first outrigger 10 and the second outrigger constituting the outrigger device are formed. The projecting direction of 20 is also the same.

How to use the outrigger device X, etc. When the crane vehicle Z equipped with the outrigger devices X and X thus constructed is used to perform a required crane work, the outrigger devices X and X are used as work sites. According to the above condition, the crane vehicle Z is appropriately projected to ensure the stability of the crane vehicle Z and ensure safe work. Specifically, it is as follows.

At the time of normal work, that is, when the crane truck Z has a sufficient installation space at the work place, each outrigger 1
In the case where both 0 and 20 can be set to the maximum overhang state, the first outrigger 10 is overhanged obliquely from the right chassis 2 side toward the left side of the vehicle body to be grounded as shown by the solid line. The second outrigger 20 extends horizontally to the right side of the vehicle body as shown by the chain line to be grounded, and these two outriggers 10 and 20 ensure high stability on both sides of the vehicle body.

At the time of special work, that is, as shown in FIG. 1, for example, since there is not enough space for installing the mobile crane Z in the working place, the rail support 3 is provided between the road 31 and the sidewalk 32.
The crane vehicle Z is stopped on the road 31 of the road where the guardrail 34 is installed by 3, 33, ... And the outriggers 10 and 20 are overhanged here to perform a predetermined crane work toward the sidewalk. It's a work that must be done. In the work under such special working conditions, first, the crane vehicle Z is stopped at the end of the road 31 so that the first outrigger 10 projects toward the sidewalk 32.

In this state, each outrigger 10, 20
In that case, first, on the sidewalk 32 side,
The telescopic girder 17 of the first outrigger 10 extends obliquely downward from the vehicle 1 and passes through the underside of the guard rail 34 to reach the sidewalk 32, and the ground plate 14 is grounded on the sidewalk 32. Therefore, in the first outrigger 10, the first outrigger 10 is installed in the maximum overhanging state without causing interference with the guardrail 34, even though the guardrail 34 exists in the overhanging direction. The stability on the sidewalk 32 side (that is, the work position side) can be sufficiently ensured. That is, the advantage of the X-type outrigger device that the interference with the obstacle can be avoided by projecting it obliquely is maximized.

On the other hand, on the side closer to the center of the roadway 31, the jack cylinder 23 is extended while the telescopic girder 25 of the second outrigger 20 is contracted so that the second outrigger 20 is "installed on the spot". As described above, by setting the second outriggers 20 to be “installed in place”, the overhanging width of the second outriggers 20 can be minimized, and as a result, the crane vehicle Z is closer to the center of the roadway than this. It is possible to prevent it from obstructing other vehicles passing through the part as much as possible.
That is, the advantage of the H-shaped outrigger device that the extension width can be reduced by "in-situ installation" is maximized.

That is, according to the outrigger device X of this embodiment, it has the same structure as the first outrigger 10 having the same structure as the outrigger forming the so-called X-type outrigger device and the outrigger forming the H-type outrigger device. The second outrigger 20 and the outriggers 10, 20 are arranged side by side.
By appropriately selecting the overhanging mode of the work vehicle according to the installation conditions of the work vehicle, it becomes possible to perform the required work safely and accurately under all installation conditions, and the versatility of the work vehicle is improved and the work is extended. In addition, the product value of the work vehicle can be expected to improve.

In this embodiment, the first outrigger 10 is projected to the left side of the vehicle body and the second outrigger 20 is projected to the right side of the vehicle body, but the present invention is limited to the projecting direction of each of the outriggers 10, 20. However, the point is that the first outrigger 10 and the second outrigger 20
It suffices that and form the outrigger device X and that these two outriggers 10 and 20 project in mutually opposite directions.

Further, in this embodiment, the crane vehicle Z has been described as an example of the working machine, but the present invention is not limited to this, and a work vehicle equipped with the outrigger device X, for example, a high place. Of course, it can be applied to work vehicles and the like.

[Brief description of drawings]

FIG. 1 is a view as seen from the rear of a vehicle body of a mobile crane equipped with an outrigger device according to an embodiment of the present invention.

[Explanation of symbols]

1 is a vehicle, 2 is a chassis, 3 is a swivel, 4 is a boom, 1
0 is a first outrigger, 11 is an outer girder member, 12 is an inner girder member, 13 is a pivot pin, 14 is a ground plate, 15 is a pivot pin,
Reference numeral 16 is a jack cylinder, 17 is an extendable girder, 20 is a second outrigger, 21 is an outer girder member, 22 is an inner girder member, 23 is a jack cylinder, 24 is a ground plate, 25 is an extendable girder, 31 is a roadway, 32 is a sidewalk. , 33 is a rail support, Y is a crane device, X is an outrigger device, and Z is a mobile crane.

Claims (1)

[Claims] 1. An outrigger device for a work vehicle, comprising: a first outrigger mounted so as to be able to project to one side of a vehicle body of the work vehicle; and a second outrigger mounted so as to be able to project to the other side thereof. Of the pair of outriggers, the first outrigger pivotally supports a base end portion of a telescopic girder having a ground plate at a tip end portion thereof so as to be vertically swingable with respect to the vehicle body and expands and contracts. It is configured with a jack cylinder that swings the girder,
The second outrigger has a structure in which a jack cylinder is vertically attached to a tip end portion of a telescopic girder fixedly arranged so as to be capable of expanding and contracting laterally with respect to the vehicle body, and a ground plate is attached to a lower end of the jack cylinder. An outrigger device for a work vehicle characterized by being said to be.