Outrigger device

Abstract

To provide a mobile outrigger capable of assisting support of a load by a freight vehicle without reducing a load amount that can be loaded on the freight vehicle.SOLUTION: An outrigger device 10 can be used to assist support of a load by a truck T. The outrigger device 10 comprises: a support frame 11 that extends on both sides of the truck T and supports a chassis Tc extending in a longitudinal direction under the load, from below; right and left jack devices 20 that are connected with the support frame 11 at ends on both right and left sides of the support frame 11 and each have a jack base 21 for adjusting the height of the support frame 11; and casters 30 that are each provided at a lower end of the support frame 11 or the jack device 20, and move the support frame 11 below the chassis Tc.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an outrigger device, and particularly to an outrigger device that can be moved.

Background Art

[0002] In a hoisting vehicle such as a crane truck, an outrigger (outrigger float) is mounted on the side surface of the vehicle body. The outrigger plays a role of preventing the crane truck from tipping over by projecting to the left and right of the vehicle body and grounding on the ground. More specifically, the outrigger includes a beam that extends in the left-right direction from the vehicle body and a jack that grounds on the ground and supports the vehicle body on both sides of the vehicle body, stabilizing the posture of the crane truck during hoisting work and preventing tipping over.

[0003] On the other hand, when transporting materials to a construction site or a work site, a cargo vehicle such as a truck is used. Similar to a crane truck, an outrigger can also be mounted on a truck to prevent the vehicle body from tipping over. Patent Document 1 discloses a dump truck equipped with an outrigger, and the outrigger maintains the dump truck in a stable posture.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By mounting outriggers on a freight vehicle, it is possible to assist the freight vehicle in supporting a load and to stabilize the posture of the freight vehicle. However, since the possibility of tipping over is not as high as that of a crane vehicle, there are many freight vehicles without outriggers. In such a case, it is possible to mount outriggers on the freight vehicle as a retrofit, but in that case, there is a problem that the load capacity that can be loaded on the freight vehicle decreases due to the weight of the outriggers.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a mobile outrigger that can assist a freight vehicle in supporting a load without reducing the load capacity that can be loaded on the freight vehicle.

Means for Solving the Problems

[0007] According to the outrigger device of the present invention, the above problem is solved by providing an outrigger device used to assist a freight vehicle in supporting a load, the outrigger device including a support body that extends on both left and right sides of the freight vehicle and supports a frame that extends in the front-rear direction below the load from below, left and right leg bodies that are connected to the support body at both end portions on the left and right sides of the support body and have a height adjustment mechanism for adjusting the height of the support body, and a rotating body provided at a lower end portion of the support body or the leg body for moving the support body below the frame.

[0008] According to the above configuration, the outrigger device includes a support that supports a frame body extending in the front-rear direction below the load of the freight vehicle from below, left and right leg bodies connected to the left and right of the support and having a height adjustment mechanism, and a rotating body that moves the support below the frame body. Therefore, by moving the support below the freight vehicle without an outrigger and adjusting the height of the support, it is possible to assist in supporting the load by the freight vehicle. Also, after the loading and unloading operations of the load on the freight vehicle are completed, the outrigger device can be easily removed. Therefore, it is possible to assist in supporting the load by the freight vehicle without reducing the load capacity that can be loaded on the freight vehicle.

[0009] Further, the support may include front and rear support body members arranged side by side in the front-rear direction for supporting the frame from below, and a connecting member interposed between the front and rear support body members for connecting the front and rear support body members, and the leg bodies may be connected to the support at both left and right end portions of the front and rear support body members. According to the above configuration, since the support has front and rear support body members arranged side by side in the front-rear direction and a connecting member for connecting the front and rear support body members, it is possible to stably support the load of the freight vehicle.

[0010] Further, the connecting member may be configured to connect the front and rear support body members so as to be switchable between a separated position where they are separated from each other and a close position where they are close to each other. According to the above configuration, since the front and rear support body members can be switched between the separated position and the close position, when supporting the loading platform of the freight vehicle, they are positioned at the separated position to stably support the load, and when not supporting the load, they are positioned at the close position, so that the outrigger device can be stored or transported compactly.

[0011] Further, the rotating body may be traveling wheels attached to the lower ends of both left and right end portions of the left and right support body members. According to the above configuration, since the traveling wheels are attached to the lower ends of the four corners of the support, it is possible to stably move the support.

[0012] Further, the support preferably includes a pair of horizontal frame members extending parallel to each other in the vertical direction, a pair of vertical frame members connecting the horizontal frame members at both left and right ends of the horizontal frame members, and a reinforcing member interposed between the pair of horizontal frame members for reinforcing the support. According to the above configuration, since the support is composed of the horizontal frame members, the vertical frame members, and the reinforcing member, it is possible to achieve weight reduction while ensuring the strength of the outrigger device, improve the handling performance of the outrigger device, and suppress a decrease in the load capacity that can be loaded on the freight vehicle even when the outrigger device is transported by the freight vehicle.

[0013] Further, the height adjustment mechanism is preferably disposed on both left and right sides of the support and rotatable about a rotation axis extending in the vertical direction. According to the above configuration, since the height adjustment mechanism is rotatably connected to the support, it is possible to position the height adjustment mechanism at a position suitable for grounding the height adjustment mechanism and adjust the height of the support.

[0014] Further, a plurality of the legs are connected to both left and right ends of the support, and each of the legs preferably extends from the end in a direction away from each other. According to the above configuration, by connecting a plurality of legs to the support, the support can be stably erected, and the stability of the loading platform of the freight vehicle can be enhanced.

Effects of the Invention

[0015] According to the present invention, it is possible to provide a mobile outrigger that can assist in supporting the load by the freight vehicle without reducing the load capacity that can be mounted on the freight vehicle.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0017] Hereinafter, with reference to FIGS. 1 to 8, an outrigger device 10 according to an embodiment of the present invention (hereinafter, this embodiment) will be described. However, the embodiment described below is merely an example for facilitating the understanding of the present invention and does not limit the present invention. That is, the present invention can be changed and improved without departing from its gist, and it goes without saying that the present invention includes equivalents thereof.

[0018] The outrigger device 10 of the present invention is provided with casters 30, and is used to assist in supporting the load by the cargo vehicle by moving it under a cargo vehicle without an outrigger and supporting the loading platform Ta in which the load is accommodated from below. Further, after the loading or unloading operation of the load is completed, the outrigger device 10 can be easily removed, and it is possible to assist in supporting the load by the cargo vehicle without reducing the load capacity that can be loaded on the cargo vehicle.

[0019] In the following description, the "left - right direction" coincides with the left - right direction of the truck T (the left - right direction in FIG. 3) when the outrigger device 10 is located below the truck T. Also, the "front - rear direction" coincides with the front - rear direction of the truck T (the left - right direction in FIG. 5) when the outrigger device 10 is located below the truck T. Further, the "up - down direction" is the vertical direction, meaning the vertical direction (the up - down direction in FIG. 3) when the outrigger device 10 is erected.

[0020] <<Overview of the Outrigger Device 10>> FIG. 1 shows a state in which the outrigger device 10 is positioned behind the truck T to assist in supporting the load by the truck T. The truck T is a cargo vehicle generally called a "4 - ton truck" and is excellent in the ability to travel long distances and transport construction materials. However, the truck T may be a 2 - ton truck or a 10 - ton truck.

[0021] As shown in FIG. 1, the truck T mainly includes a chassis Tc, a cab Td connected to the chassis Tc at a position in front of the chassis Tc, and a loading platform Ta mounted on the chassis Tc. The cab Td is provided with a driver's seat and a passenger seat and forms a cab space.

[0022] The chassis Tc has a pair of front - rear frames Tc1 extending in the front - rear direction and a cross - frame Tc2 orthogonal to the front - rear frames Tc1. The front - rear frames Tc1 are arranged in parallel to each other left - right. The cross - frame Tc2 is interposed between the left - right front - rear frames Tc1 and connects the front - rear frames Tc1. The front - rear frames Tc1 and the cross - frame Tc2 cooperate with each other to support the loading platform Ta and the load accommodated in the loading platform Ta. In other words, the front - rear frames Tc1 and the cross - frame Tc2 have the role of a joist for supporting the loading platform Ta and the load. The chassis Tc corresponds to a frame.

[0023] In front of and behind the wheels W of the chassis Tc, a suspension (not shown) is provided. The suspension is an air suspension that expands by injecting gas and contracts by discharging gas. The suspension serves to absorb the load of the cargo and the impact during driving. In other words, the suspension expands and contracts following the loading condition of the cargo and the road condition during driving.

[0024] The cargo bed Ta forms a storage space capable of storing the cargo. In FIG. 1, a box-shaped cargo bed Ta covered by walls on all four sides is shown, but it is not limited to this. The cargo bed Ta may be a flat type without a roof.

[0025] The outrigger device 10 is located below the chassis Tc and supports the chassis Tc from below. More specifically, the outrigger device 10 extends on both the left and right sides in the vicinity of the suspension, behind the rear wheels of the truck T, and supports the left and right front and rear frames Tc1 from below. Thereby, when loading or unloading the cargo onto the cargo bed Ta, the movement of the truck T sinking significantly due to the action of the suspension can be suppressed, and a stable working space can be provided.

[0026] Further, the outrigger device 10 has traveling wheels (casters 30) for moving the outrigger device 10. Therefore, even when the outrigger is not mounted on the truck T, the outrigger device 10 can be moved below the chassis Tc of the truck T to support the cargo stored in the cargo bed Ta. Also, when the loading or unloading operation of the cargo onto the cargo bed Ta is completed, the outrigger device 10 can be easily removed from below the chassis Tc. Therefore, it is possible to assist in supporting the cargo without reducing the load capacity that can be loaded on the truck T.

[0027] <<Outrigger device 10>> Next, the outrigger device 10 will be described with reference to FIGS. 2 to 5. As shown in FIGS. 2 and 3, the outrigger device 10 mainly includes a support frame 11 located at the center, a jack device 20 connected to both the left and right sides of the support frame 11, and a caster 30.

[0028] The support frame 11 abuts against the chassis Tc of the truck T and supports the chassis Tc from below. The support frame 11 has a front support frame 11F arranged in the front and a rear support frame 11R arranged in the rear and facing the front support frame 11F. A connecting member 16 is interposed between the front support frame 11F and the rear support frame 11R to connect the front support frame 11F and the rear support frame 11R. The support frame 11 corresponds to a support body. Since the front support frame 11F and the rear support frame 11R have the same shape, dimensions, and configuration, in the following description, when there is no need to particularly distinguish between the front support frame 11F and the rear support frame 11R, they will simply be described as the "support frame 11". The front support frame 11F and the rear support frame 11R correspond to the front and rear support body members.

[0029] The support frame 11 is a frame body having a rectangular shape when viewed from the front, and includes an upper support frame member 12, a lower support frame member 13, and left and right vertical support frame members 14. The upper support frame member 12, the lower support frame member 13, and the vertical support frame members 14 are single-pipe pipes. In other words, the support frame 11 is configured by combining general-purpose products used for constructing a temporary scaffold at a construction site. Therefore, it is possible to suppress an increase in the cost of the outrigger device 10 and simplify the configuration.

[0030] The upper support frame member 12 and the lower support frame member 13 extend in the left - right direction parallel to each other and are connected to the vertical support frame member 14 at both left - right ends. Between the upper support frame member 12 and the lower support frame member 13, a reinforcing member 15 for reinforcing the support frame 11 is interposed. As shown in FIG. 3, the two reinforcing members 15 extend obliquely downward from both left - right ends (the connecting portion of the upper support frame member 12 and the vertical support frame member 14) and are connected to the lower support frame member 13. However, the arrangement of the reinforcing member 15 is not limited to the arrangement shown in FIG. 3. The reinforcing member 15 may be arranged so as to form a truss structure between the upper support frame member 12 and the lower support frame member 13. Also, the reinforcing member 15 may extend in the vertical direction so as to be orthogonal to the upper support frame member 12 and the lower support frame member 13 and connect the upper support frame member 12 and the lower support frame member 13. By the reinforcing member 15 improving the strength of the support frame 11, the outrigger device 10 can ensure sufficient strength against the load of the truck T. The upper support frame member 12 and the lower support frame member 13 correspond to a pair of horizontal frame members, and the vertical support frame member 14 corresponds to a pair of vertical frame members.

[0031] The connecting member 16 mainly includes a connecting shaft 16a extending in the front - rear direction and universal clamps 16b provided at both ends of the connecting shaft 16a. The connecting shaft 16a is a single - pipe that is interposed between the lower support frame member 13 of the front support frame 11F and the lower support frame member 13 of the rear support frame 11R to connect the two.

[0032] The universal clamp 16b connects the connecting shaft 16a and the lower support frame member 13 so that the connection angle between them can be changed. Therefore, the connecting member 16 connects the front support frame 11F and the rear support frame 11R so that they can be switched between a separated position (deployed state) where they are separated from each other and a proximate position (folded state) where they are close to each other.

[0033] FIG. 4 shows a plan view of the outrigger device 10 in the deployed state and the folded state. By deploying the outrigger device 10 and positioning the front support frame 11F and the rear support frame 11R at spaced positions, the outrigger device 10 can stably support the chassis Tc of the truck T. Also, by folding the outrigger device 10 and positioning the front support frame 11F and the rear support frame 11R at close positions, the outrigger device 10 can be stored or transported compactly.

[0034] Returning to FIG. 3, at the lower end of the support frame 11, a caster 30 with a stopper 30a is attached. More specifically, the caster 30 is attached to the lower end portion of the vertical support frame member 14 at both left and right ends of the front support frame 11F and the rear support frame 11R. In other words, a total of four casters 30 are attached to the four corners of the support frame 11. Therefore, the outrigger device 10 can travel stably on the construction site and be positioned below the chassis Tc of the truck T. The caster 30 corresponds to a rotating body and a traveling wheel.

[0035] Jack devices 20 are connected to both left and right ends of the support frame 11. The jack device 20 has a height adjustment mechanism for adjusting the height of the support frame 11 and supports the support frame 11 on both left and right sides. The jack device 20 corresponds to a leg body. The jack device 20 mainly includes a jack base 21, an extension member 22, and a jack connection member 23. Any of the jack base 21, the extension member 22, and the jack connection member 23 can be a general-purpose product used for constructing a temporary scaffold at a construction site.

[0036] As shown in FIG. 5, the jack base 21 is a pipe jack that serves as a height adjustment mechanism for adjusting the height of the support frame 11. The jack base 21 has a support plate 21a, a vertical shaft 21b, and a rotation handle 21c. By placing the support plate 21a on the floor plate D and rotating the rotation handle 21c, the screw grooves formed on the outer peripheral surface of the vertical shaft 21b and the inner peripheral surface of the rotation handle 21c are screwed together, and the height of the rotation handle 21c can be adjusted.

[0037] The extension member 22 is an extension member that extends the jack base 21 in the left-right direction. As shown in FIG. 3, by extending the jack base 21 in the left-right direction, the posture of the truck T can be stabilized. The extension member 22 has a lifting cylinder portion 22a, an extension portion 22b, a lock piece 22c, and a connecting clamp 22d.

[0038] The lifting cylinder portion 22a is a single pipe into which the vertical shaft 21b is inserted inside. The lifting cylinder portion 22a is located above the rotation handle 21c. When the rotation handle 21c is rotated, the lifting cylinder portion 22a moves up and down in conjunction with the rotation handle 21c, and the support frame 11 is moved up and down via the extension portion 22b. A lock piece 22c is attached to the side surface of the lifting cylinder portion 22a. The lock piece 22c enters a through hole formed in the side surface of the lifting cylinder portion 22a, and can fix the relative position between the lifting cylinder portion 22a and the jack base 21. The lock piece 22c is used to fix the jack base 21 at a height at which the support plate 21a does not contact the ground when the outrigger device 10 is run.

[0039] The extension part 22b is a horizontal member that extends the jack base 21 inserted into the lifting cylinder part 22a in the left - right direction. The extension part 22b is rotatably connected to the jack connection member 23 via a connection clamp 22d. Therefore, as shown in FIG. 4, the jack base 21 is rotatably connected around the jack connection member 23 that extends vertically at both left and right ends of the support frame 11. In this way, since the jack base 21 is rotatably connected around the jack connection member 23, it is possible to avoid unstable ground areas and set up the jack base 21 vertically, and adjust the height of the support frame 11. The jack connection member 23 corresponds to a rotating shaft.

[0040] The jack connection member 23 is fixed to the vertical support frame member 14 of the support frame 11 via a connection clamp 23a. Therefore, when the extension member 22 moves up and down in conjunction with the rotation handle 21c, the jack connection member 23 and the support frame 11 also move up and down in conjunction.

[0041] <<Usage method of the outrigger device 10>> Next, the usage method of the outrigger device 10 will be described. FIG. 6 shows the support procedure for the load of the truck T using the outrigger device 10. The method shown in FIG. 6 will be described as being performed by a single operator.

[0042] First, the operator deploys the outrigger device 10 so that the front support frame 11F and the rear support frame 11R are in the separated positions (step S10). Thereby, the outrigger device 10 is supported by the four casters 30 attached to the lower ends of the front support frame 11F and the rear support frame 11R, and is in a state where it can run stably.

[0043] Next, the operator moves the outrigger device 10 under the chassis Tc of the truck T (step S11). Specifically, the operator moves the outrigger device 10 so that it is located near the suspension at the rear of the truck T. At this time, by positioning the jack device 20 on both left and right sides of the truck T, the support frame 11 is made orthogonal to the front and rear frames Tc1 of the chassis Tc.

[0044] FIG. 7 is a view showing the outrigger device 10 during movement under the truck T. The outrigger device 10 is moved from the side under the chassis Tc behind the rear wheels of the truck T. As a result, the load of the truck T without the outriggers can be supported by the mobile outrigger device 10.

[0045] Next, the operator erects the jack device 20 (step S12). More specifically, first, the operator places the floor plate D on the ground. Subsequently, the operator operates the lock piece 22c of the extension member 22 to position the support plate 21a of the jack base 21 on the floor plate D. Thereby, the jack device 20 can be erected in an upright state with respect to the ground.

[0046] Next, the operator performs a jack-up operation on the jack device 20 to raise the support frame 11 (step S13). Specifically, the operator rotates the rotary handle 21c and raises it until the upper support frame member 12 of the support frame 11 abuts against the front and rear frames Tc1 of the truck T. At this time, the wheels W of the truck T are in contact with the ground without floating from the ground, and the load is supported by the wheels W. On the other hand, the outrigger device 10 supports the chassis Tc of the truck T from below. Therefore, the load of the loading platform Ta is supported by the truck T and the outrigger device 10, and when performing the loading operation or the unloading operation on the loading platform Ta, the movement of the loading platform Ta sinking greatly downward due to the action of the suspension is suppressed. In other words, the outrigger device 10 provides a stable working space for the operator performing the loading operation or the unloading operation of the load.

[0047] Next, it is determined whether or not the jack-up operation has been completed for all four jack devices 20 (step S14). If the jack-up operation has not been completed for all four jack devices 20 (step S14: No), the next jack device 20 is operated to raise the support frame 11 (step S13).

[0048] On the other hand, when the jacking-up operation is completed for all of the four jack devices 20 (step S14: Yes), the outrigger device 10 supports the loading platform Ta via the chassis Tc of the truck T. Therefore, the operator finishes the operation of the outrigger device 10 and performs the loading operation or the unloading operation of the load.

[0049] FIG. 8 shows a state in which the outrigger device 10 supports the load of the truck T from below. As shown in FIG. 8, the wheels W of the truck T are in contact with the ground without floating from the ground. Further, the outrigger device 10 extends on both the left and right sides below the truck T and supports the front and rear frames Tc1 from below. Therefore, the outrigger device 10 can prevent the sinking and tilting of the loading platform Ta due to the action of the suspension and appropriately assist the support of the loading platform Ta by the truck T. Further, when the loading operation or the unloading operation of the load is completed, the operator can easily remove the outrigger device 10 from below the truck T by moving the outrigger device 10. Therefore, it is possible to assist the support of the load by the truck T without reducing the load capacity that can be loaded on the truck T by the outrigger device 10.

[0050] As described above, the outrigger device 10 according to the present embodiment has been described. The above-described embodiment is merely an example for facilitating the understanding of the present invention and does not limit the present invention. That is, the present invention can be changed and improved without departing from the gist thereof, and it goes without saying that equivalents thereof are included in the present invention.

[0051] <<Modification Example>> In the above-described embodiments, the jack base 21 has been described as being connected one by one to the left and right sides of the support frame 11, but it is not limited to this. A plurality of jack bases 21 may be connected to the left and right sides of the support frame 11. Also, in the above-described embodiments, the support frame 11 has been described as being composed of a front support frame 11F and a rear support frame 11R, but it is not limited to this. The support frame 11 may be composed of a single support frame 11. In the following description, the same components as those in the above-described embodiments are denoted by the same reference numerals and their descriptions are omitted to clarify the differences in the configurations.

[0052] FIG. 9 is a plan view of the outrigger device 10A according to a modified example. As shown in FIG. 9, the outrigger device 10A mainly includes a support frame 11 located at the center, a jack device 20A connected to the left and right sides of the support frame 11, and a caster 30 (not shown in FIG. 9).

[0053] The support frame 11 is composed of a single support frame 11 and is not arranged side by side in the front and rear directions. Also, two jack bases 21 are connected to each of the left and right ends of the support frame 11. The jack base 21 is rotatably connected around the jack connecting member 23 and extends to the left and right sides so as to be separated from each other. In this way, by connecting two jack bases 21 to each of the left and right ends of the support frame 11, it is possible to support the loading platform Ta in the same manner as the outrigger device 10 in the above-described embodiment.

[0054] Also, since the outrigger device 10A according to the modified example is composed of a single support frame 11, the number of parts can be reduced, and it is possible to reduce the cost of the outrigger device 10A. Also, since the outrigger device 10A according to the modified example is composed of a single support frame 11, it is possible to reduce the weight and improve the handling performance of the outrigger device 10A.

[0055] In the above-described embodiment, the outrigger device 10 has been described by taking the truck T as an example of a freight vehicle, but it is not limited thereto. The freight vehicle may be a truck vehicle with a crane device called a unique. Further, the freight vehicle may be a dump truck, a mixer truck, or a tank truck.

[0056] In the above-described embodiment, the front support frame 11F and the rear support frame 11R have been described as being connected between a separated position and a proximity position in a switchable manner by the connecting shaft 16a and the free clamp 16b, but it is not limited thereto. It is only necessary that the front support frame 11F and the rear support frame 11R can be switched between a separated position and a proximity position, and the connecting member 16 may be a bendable bending member.

[0057] In the above-described embodiment, the connecting shaft 16a and the free clamp 16b have been described as being connected to the lower support frame member 13, but it is not limited thereto. The connecting shaft 16a and the free clamp 16b may be connected to the upper support frame member 12, or may be connected to both the upper support frame member 12 and the lower support frame member 13.

[0058] In the above-described embodiment, the jack device 20 has been described as having the jack base 21 used when constructing a temporary scaffold, but the height adjustment mechanism is not limited to the jack base 21. The height adjustment mechanism may be a hydraulic cylinder.

[0059] In the above-described embodiment, the outrigger device 10 has been described as being positioned behind the rear wheels of the truck T, but it is not limited thereto. The outrigger device 10 may be positioned in the vicinity of the suspensions of the front and rear wheels of the truck T. Thereby, it becomes possible to more stably support the load of the truck T.

Explanation of Reference Numerals

[0060] 10, 10A Outrigger device 11 Support frame 11F Front support frame 11R Rear support frame 12 Upper support frame member (horizontal frame member) 13 Lower support frame member (horizontal frame member) 14 Vertical support frame member (vertical frame member) 15 Reinforcing member 16 Connecting member 16a Connecting shaft 16b Universal clamp 20, 20A Jack device (leg) 21 Jack base (height adjustment mechanism) 21a Support plate 21b Vertical shaft 21c Rotating handle 22 Extension member 22a Lifting cylinder part 22b Extension part 22c Lock piece 22d Connecting clamp 23 Jack connecting member 23a Connecting clamp 30 Caster (rotating body, running wheel) 30a Stopper T Track Ta Loading platform Tc Chassis (frame) Tc1 Front - rear frame Tc2 Cross frame Td Cab D Floor board W Wheel

Claims

1. An outrigger device used to assist in supporting a load by a cargo vehicle, a support that extends on both left and right sides of the cargo vehicle and supports a frame extending in the front-rear direction below the load from below, left and right leg bodies that are connected to the support at both left and right end portions of the support and have a height adjustment mechanism for adjusting the height of the support, and a rotating body provided at a lower end portion of the support or the leg body, for moving the support below the frame. The outrigger device is characterized by comprising these components.

2. The support, has front and rear support body members arranged side by side in the front-rear direction for supporting the frame from below, and a connecting member interposed between the front and rear support body members for connecting the front and rear support body members, wherein the leg bodies are connected to the support at both left and right end portions of the front and rear support body members. The outrigger device according to Claim 1 is characterized by this structure.

3. The connecting member connects the front and rear support body members in a switchable manner between a separated position where they are separated from each other and a proximity position where they are close to each other. The outrigger device according to Claim 2 is characterized by this structure.

4. The rotating body is a traveling wheel attached to the lower end of each of both left and right end portions of the left and right support body members. The outrigger device according to Claim 2 is characterized by this structure.

5. The support has a pair of horizontal frame members extending parallel to each other in the vertical direction, a pair of vertical frame members connecting the pair of horizontal frame members at both left and right end portions of the pair of horizontal frame members, and a reinforcing member interposed between the pair of horizontal frame members for reinforcing the support. The outrigger device according to Claim 1 is characterized by this structure.

6. The height adjustment mechanism is arranged on both left and right sides of the support and is rotatable about a rotation axis extending in the vertical direction. The outrigger device according to Claim 1 is characterized by this structure.

7. A plurality of the leg bodies are connected to both left and right end portions of the support, and each of the leg bodies extends from the end portion in a direction away from each other. The outrigger device according to Claim 1 is characterized by this structure.

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