Outrigger device

Abstract

To provide an outrigger device capable of easily changing an attitude without using an actuator only for an attitude change, and reducing a vehicle longitudinal width.SOLUTION: An outrigger device 10 constitutes a double leverage mechanism by a base 11, a swing arm 12, a first link arm 13, a second link arm 14, and a base B, and comprises an outrigger cylinder 15 as an actuator for actuating the double leverage mechanism. At the tip of the swing arm 12, a ground part 16 is supported about an axis in a vehicle longitudinal direction.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an outrigger device mounted on a work vehicle.

Background Art

[0002] Conventionally, an outrigger device mounted on a work machine having a work implement mounted on a truck or the like includes a base fixed to a chassis frame of the vehicle, a horizontal outrigger stored in a nested manner inside the base, and a vertical outrigger fixed to the tip of the horizontal outrigger in a direction along the vehicle vertical direction and having an outrigger cylinder inside.

[0003] When using such an outrigger device, first, the horizontal outrigger is horizontally pulled out from the base to the outside in the vehicle width direction, and the outrigger cylinder is extended to ground the tip of the cylinder rod. Then, the outrigger cylinder is further extended to move the load applied to the traveling device of the vehicle to the outrigger device. In this way, the reaction force against the overturning moment generated when a load is applied to the work implement is increased, and the stability of the vehicle is ensured.

[0004] Such an outrigger device has a problem that the mounting space for auxiliary devices is limited because the vertical outrigger extends toward the lower part of the chassis frame. However, Patent Document 1 describes an outrigger device that manually rotates the vertical outrigger between a storage posture in which the grounding part of the vertical outrigger faces upward and a grounding posture in which it faces downward. The outrigger device in which the grounding part of the vertical outrigger faces upward in the storage posture as described in the same document has a feature that it is easy to avoid interference between the vertical outrigger and a fuel tank or the like mounted on the lower part of the vehicle.

[0005] In particular, in the outrigger device disclosed in FIG. 9 of Patent Document 1, the vertical outriggers are swingably attached to the base, and links are attached so as to connect the outer box and the base. Therefore, when the outrigger cylinder is extended, the vertical outriggers extend and rotate approximately one-third while floating touches the ground, and the load moves from the vehicle to the outrigger device.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In a working machine such as a truck equipped with a vehicle-mounted crane device, in order to secure the width of the loading platform, the shorter the width dimension of the outrigger device in the vehicle longitudinal direction, the better. This is because the wider the range occupied by the outrigger device in the vehicle length direction, the narrower the space where the loading platform or the like can be installed. However, due to its structure, the conventional staggered outrigger device as shown in FIG. 7(a) of the present application makes it impossible to make the width dimension in the vehicle longitudinal direction less than the width obtained by arranging two horizontal outrigger cylinders side by side. If the horizontal outriggers are arranged in a butting manner as shown in FIG. 7(b) of the present application, the length that the horizontal outriggers can project is approximately half that when the horizontal outriggers are arranged side by side in the vehicle longitudinal direction. Also, when one side horizontal outrigger is longer than the other side horizontal outrigger, the maximum projected length of the horizontal outriggers is different on the left and right, so the rated load changes on the left and right of the vehicle, which impairs workability.

[0008] In the case of an outrigger device as disclosed in FIG. 9 of Patent Document 1, it is possible to shorten the width dimension of the outrigger device. However, in order to change the posture, the vertical outrigger must necessarily be provided with a telescopic mechanism. And the vertical outrigger disclosed in FIG. 9 of Patent Document 1 has a nested structure as a telescopic mechanism. However, due to its structure, the outer box and the inner box are in surface contact with each other, and the resistance for telescoping becomes large. Furthermore, since the telescoping is repeated in a surface contact state, the wear of the sliding part is also severe.

[0009] In addition, in such an outrigger device, since the posture cannot be changed unless the vertical outrigger is extended, the position of the float always moves outward in the vehicle width direction when the posture is changed. That is, since the vertical outrigger rotates while extending, it may be difficult to ground the outrigger device in a narrow place or the like.

[0010] In view of the above circumstances, an object of the present invention is to provide an outrigger device that can shorten the width dimension and can change the posture without telescoping the vertical outrigger.

Means for Solving the Problems

[0011] A first invention is an outrigger device mounted on a working machine, a base fixed to the working machine, a swing arm whose base end is supported by the end in the vehicle width direction of the base so as to be able to rise and fall around a horizontal first axis, and a grounding part is provided at the tip end, an actuator whose one end is swingably supported by the swing arm, and by a telescopic operation, the swing arm is changed between a storage posture in which the grounding part faces upward and a grounding posture in which the working machine can be supported and is laid down, An outrigger device characterized by comprising a link that supports a part of the actuator and maintains a distance at which the base, the swing arm, and the actuator do not interfere with each other when the posture is changed.

[0012] The second invention further includes, in the outrigger device described in the first invention, a first link arm having one end supported so as to be swingable about a second axis parallel to the first axis on the center side in the width direction of the work machine with respect to the first axis, a second link arm having one end supported so as to be swingable about a third axis parallel to the first axis at the base end portion of the swing arm and the other end supported so as to be swingable about a fourth axis parallel to the first axis at the other end of the first link arm, a first link arm having one end supported so as to be swingable about a second axis parallel to the first axis on the center side in the width direction of the work machine with respect to the first axis, a second link arm having one end supported so as to be swingable about a third axis parallel to the first axis at the base end portion of the swing arm and the other end supported so as to be swingable about a fourth axis parallel to the first axis at the other end of the first link arm, The outrigger device is characterized by including, as an actuator, a cylinder having one end supported so as to be swingable about the fourth axis at the tip end portion of the first link arm and the other end supported so as to be swingable about a fifth axis parallel to the first axis at a part of the swing arm.

[0013] The third invention is an outrigger device characterized in that the fifth axis described in the second invention is provided on the tip end side of the swing arm with respect to the third axis.

[0014] The fourth invention is characterized in that when the outrigger device described in the first invention is in the storage posture, the width between the grounding portions is equal to or less than the width dimension of the vehicle. An outrigger device.

[0015] The fifth invention is an outrigger device characterized in that the swing arm described in the first invention stores an inner arm therein, the grounding portion is provided at the tip end portion of the inner arm, and the length of the swing arm can be adjusted by pulling out or storing the inner arm.

[0016] The sixth invention is an outrigger device characterized in that a vertical outrigger cylinder that can be extended and retracted along the vertical direction of the work machine is fixed to the end of the base in the vehicle width direction as described in any one of the first to fifth inventions.

Advantages of the Invention

[0017] By using the present invention, it is possible to easily change the posture without using an actuator dedicated to posture change, and to provide an outrigger device capable of shortening the length in the vehicle front-rear direction.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0019] <First Embodiment> Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings, taking a vehicle-mounted crane as an example of a work machine. In the description of the drawings, the same or similar parts are denoted by the same or similar reference numerals, and redundant descriptions are omitted. Note that the drawings are schematic. Therefore, it should be noted that the relationship between the thickness and the planar dimensions, the ratio, etc. are different from the actual ones, and there are also parts where the dimensional relationships and ratios are different between the drawings. Further, the embodiments shown below illustrate devices and methods for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the materials, shapes, structures, displays, etc. of the components in the following embodiments.

[0020] In the following description and drawings regarding the configuration of the mobile crane, unless otherwise specified, the direction in which the vehicle moves forward is referred to as the "front side of the vehicle" or simply the "front side", and the direction in which the vehicle moves backward is referred to as the "rear side of the vehicle" or simply the "rear side". Also, the left hand side of the driver sitting in the driver's seat is referred to as the "left side of the vehicle" or simply the "left side", and the right hand side is referred to as the "right side of the vehicle" or simply the "right side". Similarly, based on the driver sitting in the driver's seat, the side where the ceiling of the driver's seat is located is referred to as the "upper side", and the side where the floor is located is referred to as the "lower side". When the direction is not particularly specified, it may be referred to as the "front-rear direction of the vehicle", the "left-right direction of the vehicle", or the "up-down direction of the vehicle". Note that, unless otherwise specified, the vehicle-mounted crane device is described as being swiveled to a position facing the rear along the front-rear direction of the vehicle and having the boom tilted down to a horizontal angle.

[0021] <Structure of the Mobile Crane> First, the structure of the mobile crane 1 will be described with reference to FIG. 1. The mobile crane 1 has a vehicle-mounted crane device 5 mounted on a chassis frame CF between the cabin CV and the loading platform LB of the vehicle V. The vehicle-mounted crane device 5 has a column 6 rotatably supported about an axis along the vehicle's vertical direction via a slewing device at the upper part of a base B, and a proximal end portion of a boom 7 is swingably supported about an axis along the vehicle width direction at the upper end portion of the column 6. The boom 7 can be extended and retracted by a telescopic mechanism of a nested type, and can also be raised and lowered by a hoisting cylinder 8. A winch is provided on the column 6, and a wire rope extending from the winch is connected to a hook HO suspended from the tip of the boom 7. Although details will be described later, outrigger devices 10 are provided at both ends of the base B in the vehicle width direction.

[0022] The chassis frame CF of the vehicle V is a ladder-shaped structure in which C-shaped members extending in the vehicle longitudinal direction and sandwiching a member extending in the vehicle width direction with their open sides facing each other, and the cabin CV, the loading platform LB, the vehicle-mounted crane device 5, and the outrigger device 10 are fixed thereto. Although not shown, devices such as a muffler and an air compressor are also fixed to the chassis frame CF. In particular, since the central portion of the chassis frame CF in the vehicle longitudinal direction is the position where the vehicle-mounted crane device 5 is fixed, a reinforcing member 9 is fixed thereto. Note that the reinforcing member 9 is not fixed within the range where the cabin CV is provided. This is because the installation work of the vehicle-mounted crane device 5 is carried out after the completion of the vehicle V, but at the time of installation, large and important components such as an engine are already mounted inside the cabin CV, making it difficult to fix the reinforcing member 9 later.

[0023] When the vehicle V is an electric vehicle, a plurality of batteries BA may be mounted at the lower part of the chassis frame CF. The batteries BA are arranged to have a width substantially the same as the vehicle width in order to increase the cruising range of the vehicle V. In the present embodiment, wide batteries BA are arranged side by side in the vehicle longitudinal direction, but a large number of smaller batteries may also be arranged. In such a case, the batteries BA are arranged in a state where they overlap the outrigger device 10 in the vertical direction.

[0024] <Structure of Outrigger Device> Next, with reference to FIGS. 2 to 4, the outrigger device 10 mounted on the mobile crane 1 will be described. Note that the outrigger devices 10 are provided on each of the right and left sides of the vehicle. Since the structures on the left and right are the same, in the following description, only the outrigger device provided on the right side of the vehicle will be described, and the description of the outrigger device provided on the left side of the vehicle will be omitted. Note that, although details will be described later, in the present embodiment, the outrigger device 10 is installed at a predetermined angle inclined from the vehicle width direction toward the front side of the vehicle.

[0025] The outrigger device 10 constitutes a double lever mechanism by a base 11, a swing arm 12, a first link arm 13, a second link arm 14, and a base B. And an outrigger cylinder 15 is provided as an actuator for operating this double lever mechanism. Further, a grounding portion 16 is supported at the tip of the swing arm 12 so as to rotate about an axis along the vehicle longitudinal direction.

[0026] The base 11 is a C-shaped member in a top view, whose lower part is longer in the vehicle width direction than the upper part and protrudes outward in the vehicle width direction, and is fixed to the right end of the base B. In the double lever mechanism, it is a fixed joint that does not operate.

[0027] The swing arm 12 is provided with a clamping plate 12A that protrudes toward the center in the vehicle width direction when in the retracted posture shown in FIG. 2 at the tip, and is a box-shaped member having a length of about 80% of the vehicle width. In the double lever mechanism, it is the first swing joint, and the base end portion is swingably supported about a first axis 21 that is inclined toward the front side of the vehicle at a predetermined angle with respect to the vehicle longitudinal direction on the lower side of the base 11.

[0028] Further, as shown in FIG. 4, the swing arm 12 is provided with a telescopic mechanism of a nested type, and the inner arm 17 is stored. A fixing pin 18 for fixing the telescopic state is provided at the tip portion of the swing arm 12. Although not shown, it fits into a through hole formed in the inner arm 17 along the vehicle longitudinal direction and holds the state where the inner arm 17 protrudes. Further, at the tip of the inner arm 17, the grounding part 16 is supported around a shaft 19 parallel to the first shaft 21.

[0029] The first link arm 13 is a plate material having substantially the same length as the vertical direction of the base B, and one is provided on each of the front side and the rear side of the vehicle inside the base part 11. In both lever mechanisms, it is the second swing joint, and the base end part is swingably supported around a second shaft 22 parallel to the first shaft 21 on the upper side of the base part 11.

[0030] The second link arm 14 is a plate material having about 1.5 times the length of the first link arm 13, and two are provided so as to sandwich the swing arm 12 and the first link arm 13. In both lever mechanisms, it is a connecting joint, and the base end part is swingably supported around a third shaft 23 parallel to the first shaft 21 at the base end of the swing arm 12, and the tip end part is swingably supported around a fourth shaft 24 parallel to the first shaft 21 at the other end of the first link arm 13.

[0031] The outrigger cylinder 15 is a double-acting rod cylinder in which a rod having approximately twice the length in the vertical direction of the base B is fitted into a cylinder tube having substantially the same length as the vertical length of the base B. Although it is not an element constituting a part of both lever mechanisms, it is provided outside the swing arm 12. The head side end of the cylinder tube is swingably supported around the fourth shaft 24 at the tip of the first link arm 13, and the tip of the cylinder rod is swingably supported around a fifth shaft 25 parallel to the first shaft 21 at the part protruding from the swing arm of the clamping plate 12A. When the rod extends, both lever mechanisms are swung to change the posture of the swing arm 12.

[0032] As shown in Fig. 2, when the outrigger cylinder 15 is most shortened, the outrigger device 10 is in a retracted posture where the grounding part 16 faces upward and the swing arm 12 and the outrigger cylinder 15 are parallel along the vehicle's vertical direction. When the outrigger cylinder 15 extends from the retracted posture, the grounding part 16 moves downward under the vehicle through an arc orbit centered on the swing axis of the swing arm 12 and grounds.

[0033] If the first link arm 13 and the second link arm 14 are not provided and the outrigger cylinder 15 is directly supported by the base B, when the swing arm 12 is lowered to a certain angle, the outrigger cylinder 15 will interfere with the swing arm 12 and the operation will stop. Therefore, measures such as making the swing arm 12 in a zigzag shape are necessary. In this embodiment, since both lever mechanisms are constituted by the swing arm 12, the first link arm 13, and the second link arm 14, interference between the outrigger cylinder 15 and the swing arm 12 is avoided when changing the posture between the retracted posture and the grounded posture.

[0034] <Deployment and Retraction of Outrigger Device> Continuing to refer to Figs. 2 to 4, the operation when deploying and retracting the outrigger device 10 will be described. In the initial state, the outrigger device 10, as shown in Fig. 2, is in a retracted posture for the vehicle V to travel. When the outrigger device 10 is in the retracted posture, the grounding part 16 is located on the vehicle center side rather than the right end of the vehicle V. That is, the width between the left and right grounding parts 16 is narrower than the vehicle width of the vehicle V.

[0035] After the mobile crane 1 stops at the working position, as shown in Fig. 3, the outrigger cylinder 15 is extended until it is in a substantially horizontal posture. In this state, the fixing pin 18 is pulled out from the through hole that fixes the inner arm 17 in the retracted position. Then, the inner arm 17 is pulled out and extended to the intermediate protruding position or the maximum protruding position set by the position where the fixing pin is inserted into the through hole, and the fixing pin 18 is inserted into the through hole to fix the inner arm 17 again.

[0036] Thereafter, as shown in FIG. 4, the outrigger cylinder 15 is extended again to direct the swing arm 12 downward and ground the grounding portion 16. After the grounding portion 16 is grounded, the outrigger cylinder 15 is further extended to move the load from the traveling device of the vehicle V to the swing arm 12. At this time, the extension amounts of the left and right outrigger cylinders 15 are adjusted so that the front wheels FW of the vehicle V shown in FIGS. 1 and 6 are slightly grounded and only a slight load is applied, and the vehicle body is in a horizontal state.

[0037] When storing the outrigger device 10 after the work is completed, first, the outrigger cylinder 15 is shortened to move the load from the swing arm 12 to the traveling device of the vehicle V. Thereafter, the outrigger cylinder 15 is shortened until the swing arm 12 reaches a position where it is in a horizontal posture, and the inner arm 17 is stored. After storing the inner arm 17, the outrigger cylinder 15 is shortened until the swing arm 12 is in a storage posture along the vertical direction of the vehicle. That is, the operation opposite to the deployment is performed.

[0038] <Effect of the First Embodiment> Since the swing arm 12 and the outrigger cylinder 15 are located above the chassis frame CF when the outrigger device 10 according to this embodiment is in the stored posture, the outrigger device 10 can be mounted without moving the in-vehicle components arranged below the chassis frame CF. In addition, the outrigger device 10 can be easily mounted on an electric vehicle in which a large number of batteries BA are mounted on the chassis frame CF.

[0039] In addition, the outrigger device 10 according to the present embodiment can be configured to have a shorter length in the vehicle longitudinal direction than the staggered outrigger device I1 that stores the left and right horizontal outriggers SOU as shown in FIG. 7(a) side by side in the vehicle longitudinal direction inside the base B. This is because the outrigger device on the right side of the vehicle and the outrigger device on the left side of the vehicle can be arranged at overlapping positions when viewed in the vehicle width direction. Therefore, the ratio of the loading platform LB to the length of the vehicle V in the vehicle longitudinal direction can be increased, and the loading space of the loading platform LB can be widened.

[0040] Furthermore, the outrigger device 10 according to the present embodiment is more likely to have a longer overhanging length in the vehicle width direction than the staggered outrigger device I1 as shown in FIG. 7(a) and the butting type outrigger device I2 as shown in FIG. 7(b). This is because, in the staggered outrigger device, the length of the horizontal outrigger SOU is limited by the vehicle width, whereas in the outrigger device 10 according to the present invention, an expansion and contraction mechanism is not used for the overhanging operation, and the length of the swing arm 12 is not limited by the vehicle width. Furthermore, since the overhanging is performed by changing the angle of the swing arm 12, it is easy to additionally provide an expansion and contraction mechanism and to extend the overhanging length. In addition, since the swing arm 12 is provided with an expansion and contraction mechanism, it is easy to shorten the swing arm 12, and it is possible to narrow the space required for the outrigger device 10 to be grounded.

[0041] Unlike the conventional outrigger devices I1 and I2, the outrigger device 10 according to the present embodiment can change between the stored posture and the grounded posture without the operator touching the outrigger device 10. Therefore, the steps performed by the operator before the crane operation can be reduced, and the efficiency of preparation and cleaning can be improved. In addition, since the opportunity for the operator to touch the outrigger device 10 is reduced, accidents during operation can be suppressed.

[0042] <Modification Example of the First Embodiment> In the present embodiment, the tip of the cylinder rod of the outrigger cylinder 15 is supported by the clamping plate 12A on the tip side of the swing arm 12, but the outrigger device according to the present invention is not necessarily limited to such a structure. For example, when the link ratio of each part is adjusted and the tip of the cylinder rod is supported on the base 11 side sandwiching the third axis 23 in the swing arm 12, a structure can be adopted such that the swing arm 12 assumes the stored posture when the outrigger cylinder 15 extends and assumes the grounded posture when it contracts.

[0043] Also, in the present embodiment, the tip of the cylinder rod of the outrigger cylinder 15 is supported by the fifth axis 25 so as to be sandwiched between the clamping plates 12A, but the outrigger device according to the present invention is not necessarily limited to such a structure. For example, the fifth axis 25 may be fixed so as to protrude from the front side or the rear side of the vehicle of the swing arm 12, and the swing arm 12 and the outrigger cylinder 15 may be arranged offset in the vehicle longitudinal direction.

[0044] As shown in FIG. 1, in the present embodiment, the width of the swing arm 12 and the width of the base B are substantially equal, but the present invention does not necessarily have to be such a structure. For example, the outrigger device according to the present invention may be fixed to the end of a base for storing inner boxes in an overlapping manner in the front-rear direction. In such a case, the outrigger device according to the present invention can be mounted without designing and manufacturing a dedicated base.

[0045] In the present embodiment, the swing arm 12 has a telescopic structure by a nested structure, but the present invention does not necessarily have to be such a structure. In the case of a structure in which the swing arm 12 does not expand and contract, in the operation of grounding and storing the outrigger device, the operator does not have to touch the outrigger device at all, so that the work process can be further reduced and the safety can be improved.

[0046] In the above-described embodiment, when the outrigger device 10 is in the stored position, the longitudinal direction of the swing arm 12 is in a posture along the vertical direction of the vehicle V. However, the present invention does not necessarily need to have such a structure. For example, the swing arm 12 may have a link ratio such that it further tilts toward the side of the vehicle-mounted crane device 5. In such a structure, even when the length of the swing arm 12 is extended, the height can be suppressed.

[0047] <Second Embodiment> The outrigger device 10A according to the second embodiment is configured by adding a vertical outrigger cylinder 30 that does not protrude in the vehicle width direction to the outrigger device 10A described in the first embodiment. Therefore, the description of the parts having the same structure as those in the first embodiment will be omitted.

[0048] As shown in FIG. 5, the vertical outrigger cylinder 30 is a double-acting single-rod cylinder that operates by hydraulic pressure. The cylinder tube 31 is fixed to the right end and the left end of the base B so as not to contact the battery BA or the like fixed to the chassis frame CF. And a grounding plate 33 is provided at the tip of the cylinder rod 32.

[0049] Although not shown in the figure, a switching valve for switching the flow path of the hydraulic oil for operating the vertical outrigger cylinder 30 is provided on the front side of the vehicle of the base 11. By operating the switching valve, the flow path of the hydraulic oil is switched so as to go from the outrigger cylinder 15 to the vertical outrigger cylinder 30.

[0050] The vertical outrigger cylinder 30 can be grounded instead of the outrigger device 10A. For example, as shown in FIG. 6, when the space on the right side of the vehicle is extremely narrow and work is to be performed at a location where the outrigger device 10A cannot be rotated even in the posture where the inner arm 17 is minimized, the outrigger device 10 cannot be grounded. However, by extending the vertical outrigger cylinder 30 on the right side of the vehicle, the load applied to the front wheel on the right side of the vehicle can be transferred to the vertical outrigger cylinder 30. Therefore, by using the outrigger device 10A and the vertical outrigger cylinder 30 in combination, the stability of the mobile crane 1 can be ensured.

[0051] When grounding the vertical outrigger cylinder 30, starting from the initial state shown in FIG. 5, first operate the switching valve on the right side of the vehicle. Then, as in normal operation, operate the operation lever or the wireless operator to ground the left outrigger device 10A and the right vertical outrigger cylinder 30. Note that by operating the switching valve after grounding, even if the outrigger device 10A and the vertical outrigger cylinder 30 are accidentally operated during work, the grounded side will not operate. Therefore, the switching valve also functions as a safety device.

[0052] <Effects of the Second Embodiment> By providing the vertical outrigger cylinder 30 as in the mobile crane 1 according to the present embodiment, it becomes easy to perform work using the vehicle-mounted crane device 5 in a place where there is no space to change the posture of the outrigger device 10A such as a narrow area.

[0053] <Modification of the Second Embodiment> In the present embodiment, the vertical outrigger cylinder 30 becomes operable by switching the flow path for operating the outrigger device 10A by operating the switching valve. However, in the implementation of the present invention, it is not necessarily required to provide a switching valve, and each flow path may be independent.

Description of Reference Numerals

[0054] 1... Mobile crane, 5... Vehicle-mounted crane device, 10... Outrigger device, 11... Base, 12... Swing arm, 13... First link arm, 14... Second link arm, 15... Outrigger cylinder, 16... Grounding part, 17... Inner arm, 21... First axis, 22... Second axis, 23... Third axis, 24... Fourth axis, 25... Fifth axis, 30... Vertical outrigger cylinder

Claims

1. An outrigger device mounted on a work machine, a base fixed to the work machine, a swing arm having a base end supported by the end of the base in the vehicle width direction so as to be able to rise and fall around a horizontal first axis, and a grounding portion provided at the tip end, one end is swingably supported by the swing arm, and by means of a telescopic operation, the swing arm is changed between a storage posture in which the grounding portion faces upward and a grounding posture in which the work machine can be supported and is laid down, and an actuator for changing the posture, An outrigger device comprising a link that supports a part of the actuator and maintains a distance at which the base, the swing arm, and the actuator do not interfere with each other during posture change.

2. a first link arm having one end supported swingably around a second axis parallel to the first axis on the center side in the width direction of the work machine with respect to the first axis, a second link arm having one end supported swingably around a third axis parallel to the first axis at the base end of the swing arm and the other end supported swingably around a fourth axis parallel to the first axis at the other end of the first link arm, The outrigger device according to claim 1, further comprising a cylinder as an actuator, one end of which is swingably supported around the fourth axis at the tip end of the first link arm, and the other end of which is swingably supported around a fifth axis parallel to the first axis at a part of the swing arm.

3. The outrigger device according to claim 2, wherein the fifth axis is provided on the tip end side of the swing arm with respect to the third axis.

4. The outrigger device according to claim 1, wherein the width between the grounding portions in the storage posture is equal to or less than the width dimension of the work machine.

5. the swing arm stores an inner arm therein, the grounding portion is provided at the tip end of the inner arm, The outrigger device according to claim 1, wherein the length of the swing arm can be adjusted by pulling out or storing the inner arm.

6. The outrigger device according to any one of claims 1 to 5, wherein a vertical outrigger cylinder that can be telescoped along the vertical direction of the work machine is fixed to the end of the base in the vehicle width direction.

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