JP2002205897A - High-lift work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend a second boom in length and reduce the maximum height of a vehicle body at storage. SOLUTION: A swivel base 4 is horizontally turnably arranged on the vehicle body 2 of a travelable vehicle, and an erectable and expandable first boom 5 is fitted to the swivel base 4. A second boom 10 is vertically rockably fitted to the tip of the first boom 5, and a workbench 18 is vertically rockably fitted to the tip of the second boom 10 to form a high-lift work vehicle 1. The second boom 10 rocked to be folded nearly 180 deg. downward against the first boom 5 is extended in parallel and stored overlappingly below the first boom 5 extended nearly longitudinally and prostrated and stored on the vehicle body 2, and the workbench 18 is located below the second boom and mounted and stored on the vehicle body in this high-lift work vehicle 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle of the type generally referred to as an over-fence vehicle, a bridge inspection vehicle, or the like.

[0002]

2. Description of the Related Art An aerial work vehicle called an over-fence vehicle or a bridge inspection vehicle is provided with a turntable that can be horizontally turned on a vehicle body of a vehicle that can travel, and the turntable is raised and lowered.
A typical configuration is to attach a first boom that can expand and contract, attach a second boom vertically to the tip of the first boom so as to swing up and down, and attach a worktable to the lower end of the second boom. Is known to. An example of such an aerial work vehicle is disclosed in Japanese Patent Application Laid-Open No. 8-295495. As disclosed in this publication, when a high-altitude working device constituted by attaching a second boom to the tip of a first boom and further attaching a work table to the tip of a second boom is stored in a vehicle body, The first boom is inclined so as to extend obliquely back and forth with respect to the vehicle body, the second boom is raised vertically, and the workbench is mounted on the vehicle body.

[0003]

In the above-described configuration in which the second boom is raised and stored, the aerial work vehicle is limited to the maximum vehicle height because it is a truck vehicle running on a public road. There is a problem that the second boom cannot be made too long. On the other hand, overhung vehicles are used, for example, for inspecting and repairing outer walls and lower surfaces of bridges, elevated roads, etc., and attach a vertically extending second boom and a work bench attached to the lower end thereof to the bridge. The workbench is configured to be positioned outside the fence, extend the second boom downward, and move the workbench to the lower surface side of the bridge. In such a configuration, if the length of the second boom is short as described above, there is a problem that the work table cannot be moved too far down, and the work performance is reduced.

The present invention has been made in view of such a problem.
An object of the present invention is to provide an aerial work vehicle having a configuration in which the length of the second boom can be lengthened and the maximum height of the vehicle body during storage is not excessively increased.

[0005]

In order to attain the above object, an aerial work vehicle according to the present invention comprises a movable vehicle, a swivel table horizontally rotatable on the vehicle body, and a swivel base. A first boom that is attached to the table at least to be able to undulate,
A second boom is attached to the tip of the first boom so as to swing at least up and down, and a work table is attached to the tip of the second boom so as to swing up and down. Then, the first boom extends substantially back and forth on the vehicle body, is folded down and stored, and the second boom is moved approximately 18 to the first boom.
In a folded state that has been swung 0 degrees, it extends almost forward and backward on the vehicle body and is folded down and stored.

In the aerial work vehicle configured as described above,
Since the first boom and the second boom both extend forward and backward on the vehicle body and are stored in an upright position, the first boom and the second boom can be extended to correspond to the longitudinal length of the vehicle body. Also, the maximum vehicle body height in the retracted state does not increase.

[0007] The aerial work vehicle is extended below the first boom, which extends substantially back and forth on the vehicle body and is folded down and stored.
A second boom, which has been swung so as to be bent substantially 180 degrees downward with respect to the first boom, is stored so as to extend in parallel so as to overlap vertically, and the workbench is stored below the second boom. Can be configured.

[0008] A second boom, which is swung so as to be bent substantially 180 degrees with respect to the first boom, is overlapped on the left and right sides of the first boom, which extends substantially forward and backward on the vehicle body and is stored in an upright position. The work table may be stored so as to extend below and be stored below the first boom and the second boom.

Further, a second boom, which is swung so as to be bent downward with respect to the first boom, vertically overlaps below the first boom which is substantially extended and retracted on the vehicle body and stored. The workbench may be stored so as to extend in parallel, and the workbench is located at the side of the second boom.

[0010] Further, the second rocking member is swung so as to be bent substantially 180 degrees upward with respect to the first boom above the first boom which is extended and retracted substantially on the vehicle body and stored in an upright position.
The booms are stored so as to extend in parallel so as to overlap vertically, and the workbench is stored on the second boom so that the expansion and contraction directions of the first boom and the second boom are the same in the stored state. You may be comprised so that it may become.

[0011] Further, the second boom is swung so as to be bent substantially 180 degrees upward with respect to the first boom above the first boom, which extends substantially back and forth on the vehicle body and is stored in an upright position.
The booms are stored so as to extend in parallel so as to overlap vertically, and the workbench is stored along the side of the second boom. In the storage state, the directions of expansion and contraction of the first boom and the second boom are the same. You may be comprised so that it may become.

[0012] In the aerial work vehicle having the above structure, a holder member is attached to the tip of the first boom so as to be swingable up and down.
The second boom can be supported by the holder member so as to be movable in the axial direction, and the second boom can be vertically swingably attached to the tip of the first boom. In this case, there is provided a boom moving means for moving the entire second boom with respect to the holder member in the axial direction, and the second boom expands and contracts from full contraction to full extension at an arbitrary moving position determined by the movement of the boom moving means. It is configured to be operable.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Hereinafter, there are a plurality of embodiments of an aerial work vehicle referred to as an over-fence vehicle or a bridge inspection vehicle according to the present invention, which will be described in order.

[0014]

First Embodiment First, an aerial work vehicle 1 according to a first embodiment is shown in FIGS. This aerial work vehicle 1
The vehicle can travel with front and rear wheels 3a and 3b, and is configured based on a truck vehicle having a driving cabin 2a at the front. A swivel 4 that is driven by a swivel motor (hydraulic motor) (not shown) so as to be able to swivel horizontally is disposed on the body 2 of the truck vehicle. This swivel 4
The first boom 5 is attached by pivotally connecting the base end of the first boom 5, and the first boom 5 is raised and lowered by a lifting cylinder 6. The first boom 5 is the proximal boom 5
a and the end boom 5b are telescopically combined by a telescopic cylinder (not shown). Although the first boom has a two-stage telescopic boom configuration here, it may have a multi-stage telescopic boom configuration with three or more telescopic stages.

A holder 8 is pivotally connected to the tip of the tip boom 5b so as to swing up and down. The holder 8 is formed in a hollow cylindrical shape, and its swing is controlled by a bending and stretching cylinder 9 disposed between the holder 8 and the tip boom 5b. In the hollow holder 8 oscillated by the bending / extension cylinder 9 as described above, the second
A boom 10 is inserted and attached movably in the axial direction.

The second boom 10 includes a base boom 11 and a first boom.
The intermediate boom 12, the second intermediate boom 13 and the tip boom 14 are nested and assembled. Here, the base end boom 11 is held movably in the axial direction in the holder 8, and the first end boom 12, the second intermediate boom 13, and the front end boom 14
Are extendable and contractible as shown in FIG. 3 by a built-in cylinder (not shown). Here, the second boom has a four-stage telescopic boom configuration, but may have a multi-stage telescopic boom configuration such as two-stage or three-stage telescopic boom.

A boom moving cylinder 15 for moving the base end boom 11 in the axial direction (vertical direction) with respect to the holder 8 is attached across the holder 8 and the base end boom 11 as shown in the figure. The boom moving cylinder 15 has a cylinder tube 15a attached to a holder 8 and a rod 1
The distal end of the base boom 11 is pivotally connected to the distal end of the base end boom 11, and the entire second boom 10 can be axially moved with respect to the holder 8 by extending and retracting the rod 15b with respect to the cylinder tube 15a. it can.

A support arm 16 is attached to the distal end of the distal end boom 14 so as to swing up and down. The support arm 16 is held by a leveling cylinder 17 so as to always extend vertically. A worktable 18 is attached to the distal end (lower end) of the support arm 16 which is always held vertically as described above, and has a swing mechanism 19 so as to be horizontally pivotable. As described above, the leveling cylinder 17 is always vertically extended and held, and the worktable 18, which is horizontally and freely rotatably attached thereto, is always horizontally extended and horizontally rotated (swinging operation). The work bench 18 is provided with a handrail 18a surrounding the work bench.

A pair of left and right outriggers 21 and 22 are provided on the front and rear sides of the vehicle body 2, respectively. The outriggers 21 and 22 have a ground roller 2 at the lower end, respectively.
1a, 22a, and when working at heights,
As shown in FIG. 3, the outriggers 21 and 22 are extended downward, the ground rollers 21a and 22a are grounded, and the vehicle body 2 is lifted and supported. Further, with the vehicle body 2 lifted and supported in this manner, the grounding rollers 21a,
By driving the motor 22a, the entire vehicle can be driven at a low speed to perform a predetermined high place work (a bridge inspection work or the like).

FIG. 2 is a view showing a state in which the aerial work apparatus is stored in the aerial work vehicle 1 constructed as described above, which is referred to as a bridge inspection work or overfence (a state in which the vehicle is driven by the front and rear wheels 3a and 3b). 1 and FIG. As can be clearly understood from these figures, the first boom 5 extends substantially forward and backward along the vehicle body 2 and is horizontally stored while being folded down, and the second boom 10 is moved downward by approximately 180 degrees with respect to the first boom 5. It is rocked so as to be bent, and extends parallel to the lower side of the first boom 5 so as to vertically overlap and is stored.
The work table 18 is stored below the second boom 10. By storing the first and second booms 5 and 10 and the worktable 18 in this manner, the first and second booms 5 and 5 are stored.
10 can be lengthened to a length corresponding to the entire length of the vehicle body 2, and the maximum height of the entire vehicle can be kept low.

The bridge inspection work or overfence work by the aerial work vehicle 1 configured as described above will be described with reference to FIG. The aerial work performed by the aerial vehicle 1 includes inspection of the outer surface and the lower surface frame 51 of the bridge 50 performed over the side fence 55 on the bridge 50 (or an elevated road or the like).
There is repair work.

When performing this high place work, first, FIG.
As shown in the figure, the outriggers 21 and 22 are extended downward to ground the grounding rollers 21a and 22a to lift and support the vehicle body 2. Then, the turning operation of the turning table 4 and the raising and lowering and extension / retraction operations of the first boom 5 are performed, and the second boom 10 held by the holder 8 and the working table 18 attached to the tip of the second boom 10 via the support arm 16 are connected to the fence. Move beyond 55. At this time, when the boom moving cylinder 15 is contracted and the entire second boom 10 in the fully contracted state is moved to the uppermost position with respect to the holder 8, the second boom 10 and the worktable 18 are moved outward beyond the fence 55. Easy to operate.

When the second boom 10 and the worktable 18 are moved outward over the fence 55 in this way, the boom moving cylinder 15 is extended to move the entire second boom 10 to the holder 8. Move to the lowest position (state in FIG. 3). Thereby, the second boom 10
The work table 18 attached to the lower end thereof is moved down together with the second boom 10 in the fully contracted state. During this time, the support arm 16 is held in a vertically extended state by the leveling cylinder 17, and the work table 18 is always held horizontally.

Next, when the second boom 10 is extended, FIG.
The work table 18 is moved down along the outer surface of the bridge 50 as shown in FIG. Thereby, the worktable 18 can be largely moved down with respect to the tip of the first boom 5. That is, the second boom 10 can be moved downward by the sum of the extension amount of the second boom 10 and the movement amount of the entire second boom 10 with respect to the holder 8. With the work table 18 moved to the outside surface side of the bridge 50 in this way, the worker riding on the work table 18 allows the outside surface of the bridge 50 (outside surface of the fence 55), the lower surface, the lower surface frame 51, and the like to move. Inspection and repair work is performed. In this operation, the outriggers 21 and
2 to drive the grounding rollers 21a and 22a,
, The inspection and repair work of the outer surface and the lower surface of the bridge 50 can be continuously performed along the bridge 50.

[0025]

[Second Embodiment] An aerial work vehicle 1 according to a second embodiment
00 is shown in FIGS. This aerial work vehicle 10
No. 0 can run with front and rear wheels 103a and 103b, and is configured based on a truck vehicle having a driving cabin 102a at the front. The body 102 of this truck vehicle
A swivel base 104 driven by a swivel motor (hydraulic motor) (not shown) and configured to be able to swivel horizontally is disposed on the table. The base end is pivotally connected to the swivel base 104, and
A boom 105 is attached, and the first boom 1
05 is raised and lowered by the lifting cylinder 106. The first boom 105 has a two-stage telescopic boom configuration as in the first embodiment.

A second boom 110 is pivotally connected to the end of the first boom 105 so as to be able to swing up and down. The second boom 110 is swingably controlled by a bending and stretching cylinder 109. The second boom 110 has a four-stage telescopic boom configuration as in the first embodiment, and a support arm 116 is attached to the tip of the boom member on the most distal end side so as to swing up and down. The support arm 116 is held by a leveling cylinder (not shown) so as to always extend vertically. Thus, the support arm 116 which is always held vertically
A worktable 118 having a swing mechanism 119 is attached to a tip end (lower end) of the worktable 118 so that the worktable 118 can be turned horizontally.

A pair of left and right outriggers 121 and 122 are provided on the front and rear sides of the vehicle body 2, respectively. The outriggers 121 and 122 have grounding rollers 121a and 122a at their lower ends, respectively. When working at a high place, the outriggers 121 and 122 are extended downward and the grounding rollers 121a and 122a are grounded to lift and support the vehicle body 102. It is supposed to. further,
By driving the ground rollers 121a and 122a while the vehicle body 102 is lifted and supported in this way, the entire vehicle can be run at a low speed to perform a predetermined height work (a bridge inspection work or the like). ing.

In the aerial work vehicle 100 constructed as described above, which is referred to as a bridge inspection work or overfence, the aerial work equipment is stored (the front and rear wheels 103a,
FIG. 4 and FIG.
Is shown in As can be clearly seen from these figures, the first
The boom 105 extends substantially back and forth along the vehicle body 102 and horizontally, and is stored in an upright position.
The work table 118 is swung so as to be bent by approximately 180 degrees at the side of the boom 105, and is extended and stored parallel to the side of the first boom 5 so as to overlap left and right. , 110 are stored. By storing the first and second booms 105 and 110 and the worktable 118 in this manner, the first and second booms 105 and 110 can be extended to a length corresponding to the entire length of the vehicle body 2 and the entire vehicle Can be kept low (further lower than in the first embodiment).

The aerial work vehicle 100 constructed as described above
Bridge inspection work or over fence work by
Since the operation is the same as that described with reference to FIG. 3 and can be easily understood by those skilled in the art from the above configuration, the description thereof is omitted.

[0030]

Third Embodiment An aerial work vehicle 2 according to a third embodiment
00 is shown in FIG. The aerial work vehicle 200 can travel with front and rear wheels 203a and 203b, and is configured based on a truck vehicle having a driving cabin 202a at a front portion. A swivel 204 which is driven by a swivel motor (hydraulic motor) (not shown) so as to be capable of horizontal swivel is provided on the body 202 of the truck. A base end is pivotally connected to the swivel base 204 and a first boom 205 is attached. The first boom 205 is raised and lowered by a lifting cylinder 206. The first boom 205 has a two-stage telescopic boom configuration as in the first embodiment.

A hollow cylindrical holder 208 is pivotally connected to the tip of the first boom 205 so as to be vertically swingable. The holder 208 is controlled to swing by a bending and stretching cylinder 209. The second boom 210 is inserted and mounted movably in the axial direction in the hollow holder 208 which is swung by the bending and stretching cylinder 209 in this manner. Second boom 2
10 has a four-stage telescopic boom configuration, and a second boom 21
The entirety 0 is configured to be axially moved with respect to the holder 208 by a boom moving cylinder (not shown). A work table 218 is attached to the tip of the second boom 210 so as to be vertically swingable, and the work table 218 is always horizontally held by a leveling cylinder (not shown).

A pair of left and right outriggers 221 and 222 are provided at the front and rear of the vehicle body 202. The outriggers 221 and 222 have ground rollers 221a and 222a at their lower ends, respectively. When performing, as shown in FIG.
2 is projected downward, the ground rollers 221a and 222a are grounded, and the vehicle body 202 is lifted and supported. Then, while the vehicle body 202 is lifted and supported in this way, the entire vehicle is driven at a low speed by driving the ground contact rollers 221a and 222a to perform predetermined high-place work (such as bridge inspection work).
It is configured to be able to perform.

In the aerial work vehicle 200 constructed as described above, which is referred to as a bridge inspection work or overfence, the aerial work equipment is stored (the front and rear wheels 203a,
FIG. 6 illustrates a state in which the vehicle travels on the road 203b. As can be clearly seen from this figure, the first boom 205 extends substantially back and forth along the vehicle body 202 and is stored in a lying down position, and the second boom 210 extends downward to nearly 180 degrees with respect to the first boom 205. It is rocked so as to be bent and stored in parallel with the lower side of the first boom 205 so as to overlap vertically, and the workbench 218 is stored at a position beside the second boom 210. Thus, the first and second
By storing the booms 205 and 210 and the workbench 218, the first and second booms 205 and 210 can be moved to the vehicle body 20.
2 can be increased to a length corresponding to the entire length of the vehicle 2 and the maximum height of the entire vehicle can be kept low.

The aerial work vehicle 200 constructed as described above
Bridge inspection work or over fence work by
Since the operation is the same as that described with reference to FIG. 3 and can be easily understood by those skilled in the art from the above configuration, the description thereof is omitted.

[0035]

Fourth Embodiment An aerial work vehicle 3 according to a fourth embodiment
00 is shown in FIG. The aerial work vehicle 300 can travel with front and rear wheels 303a and 303b, and is configured based on a truck vehicle having a driving cabin 302a at a front portion. A swivel base 304 that is driven by a swivel motor (hydraulic motor) (not shown) and is configured to be able to swivel horizontally is disposed on the body 302 of the truck vehicle. A base end is pivotally connected to the swivel base 304, and a first boom 305 is attached. The first boom 305 is raised and lowered by a lifting cylinder 306. The first boom 305 has a two-stage telescopic boom configuration as in the first embodiment.

At the tip of the first boom 305, a second boom 310 having a four-stage telescopic boom structure is pivotably connected to be vertically swingable. The second boom 310 is vertically swung by a bending and stretching cylinder (not shown). Controlled. A support arm 316 is pivotally attached to the tip of the second boom 310, and a worktable 318 is swingably attached to the tip of the support arm 316. The worktable 318 is swing-controlled by the leveling cylinder 317 so as to be always horizontal. In addition, a pair of left and right outriggers 321 and 322 are provided at the front and rear of the vehicle body 302 so as to be extendable and retractable. Each of these outriggers 321 and 322 has the same configuration as the outrigger of the above-described embodiment.

In the aerial work vehicle 300 constructed as described above, which is referred to as a bridge inspection work or overfence, the aerial work equipment is stored (the front and rear wheels 303a,
FIG. 7 shows a state in which the vehicle travels on the road 303b. As can be clearly seen from this figure, the first boom 305 is extended and retracted substantially horizontally along the vehicle body 302 and stored in a folded state. The work table 318 is swung to bend and stored so as to extend vertically above the first boom 305 so as to overlap vertically, and the work table 318 is stored so as to vertically overlap above the second boom 310. In addition,
As can be seen from FIG. 7, both the first boom 305 and the second boom 310 are arranged and stored so as to extend rearward, that is, extend and contract in the same direction.

As shown in FIG. 7, the first and second booms 3
The first and second booms 305 and 310 can be extended to a length corresponding to the entire length of the vehicle body 302 by storing the work table 05 and the work table 318, and the maximum height of the entire vehicle can be kept low. it can. In addition, the heavy first boom 305 and the second boom 310 are positioned on the lower side, and the lower work bench 318 is positioned on the upper side thereof. Improve the quality.

The aerial work vehicle 300 constructed as described above
Bridge inspection work or over fence work by
Since the operation is the same as that described with reference to FIG. 3 and can be easily understood by those skilled in the art from the above configuration, the description thereof is omitted.

[0040]

Fifth Embodiment An aerial work vehicle 4 according to a fifth embodiment.
00 is shown in FIG. The aerial work vehicle 400 can travel with front and rear wheels 403a and 403b, and is configured based on a truck vehicle having a driving cabin 402a at a front portion. A turning table 404 that is driven by a turning motor (hydraulic motor) (not shown) and is configured to be able to turn horizontally is disposed on the body 402 of the truck vehicle. A first end boom 405 having a two-stage telescopic structure is attached to the swiveling base 404 by pivotally connecting a base end thereof.
The boom 405 is raised and lowered by the lifting cylinder 406.

At the tip of the first boom 405, a second boom 410 having a four-stage telescopic boom configuration is pivotally connected so as to be able to swing up and down, and a support link 4 at the tip of the first boom 405 is provided.
The second boom 410 is controlled to swing up and down by a bending and stretching cylinder 409 supported by 05a. A support arm 416 is pivotally attached to the tip of the second boom 410, and a worktable 418 is swingably attached to the tip of the support arm 416. The worktable 418 is swing-controlled by the leveling cylinder 417 so as to be always horizontal. In addition, a pair of left and right outriggers 421 and 422 that are extendable below are provided on the front and rear sides of the vehicle body 402, respectively. Each of these outriggers 421 and 422 has the same configuration as the outrigger of the above-described embodiment.

In the aerial work vehicle 400 constructed as described above, which is called a bridge inspection work or overfence, the aerial work equipment is stored (the front and rear wheels 403a,
FIG. 8 shows a state in which the vehicle travels on the road according to 403b. As can be clearly seen from this figure, the first boom 405 extends substantially back and forth along the vehicle body 402 and is stored in a lying down position, and the second boom 410 extends upward to nearly 180 degrees with respect to the first boom 405. It is rocked so as to be bent and is stored in parallel with the upper side of the first boom 405 so as to vertically overlap and be stored, and the workbench 418 is stored so as to be laterally overlapped on the side of the second boom 410. In addition,
As can be seen from FIG. 8, the first boom 405 and the second boom 410 are both arranged and stored so as to extend rearward, that is, extend and contract in the same direction.

As shown in FIG. 8, the first and second booms 4
The first and second booms 405, 410 can be extended to a length corresponding to the entire length of the vehicle body 402 by storing the work table 05, 410 and the work table 418, and the maximum height of the entire vehicle can be kept low. it can. Further, the first boom 405 and the second boom 410 having a large weight are located on the lower side, and the workbench 418 having a small weight is located beside the second boom 410. Thus, the running stability of the vehicle is improved.

The aerial work vehicle 400 constructed as described above
Bridge inspection work or over fence work by
Since the operation is the same as that described with reference to FIG. 3 and can be easily understood by those skilled in the art from the above configuration, the description thereof is omitted.

[0045]

[Sixth Embodiment] An aerial work vehicle 5 according to a sixth embodiment
00 is shown in FIGS. This aerial work vehicle 50
Numeral 0 is capable of traveling with front and rear wheels 503a and 503b, and is configured based on a truck vehicle having a driving cabin 502a at the front. The body 502 of this truck vehicle
A swivel table 504 that is driven by a swing motor (hydraulic motor) (not shown) so as to be capable of horizontal swivel is provided above the swing table. A base end is pivotally connected to the swivel base 504, and a first boom 505 having a two-stage telescopic structure is attached. The first boom 505 is moved up and down by an up / down cylinder 506.

A hollow cylindrical holder 508 is pivotally connected to the end of the first boom 505 via a connecting member 508a so as to be able to swing up and down, and this holder 508 is swingably controlled by a bending and stretching cylinder (not shown). . This hollow holder 5
08, a second boom 510 is inserted and attached movably in the axial direction. The second boom 510 has a four-stage telescopic boom configuration, and the entire second boom 510 is configured to be axially moved with respect to the holder 508 by a boom moving cylinder 515.

At the tip of the second boom 510, a support arm 516 is pivotably mounted.
A work table 518 is attached to a tip of the work table 6 so as to swing up and down. The worktable 518 is provided with the leveling cylinder 51.
7 keeps it horizontal. The worktable 518 includes a fixing member 518a attached to the tip of the support arm 516.
And a slide member 518b disposed on the fixing member 518a so as to be slidable in the direction of arrow A. The area of the work table 518 can be enlarged by sliding the slide member 518b in the direction of arrow A. I have. In addition, a pair of left and right outriggers 521 and 522 are provided at the front and rear of the vehicle body 502 so as to be extendable. Each of these outriggers 521 and 522 has the same configuration as the outrigger of the above-described embodiment.

In the aerial work vehicle 500 constructed as described above, which is called a bridge inspection work or overfence, the aerial work equipment is stored (the front and rear wheels 503a,
The state in which the vehicle travels on the road according to 503b) is shown in FIGS. As can be clearly seen from this figure, the first boom 505 extends substantially back and forth along the vehicle body 502 and is stored in a lying down position, and the second boom 510 is raised upward to nearly 180 degrees with respect to the first boom 505. The work table 518 is swung so as to be bent and stored in parallel with the upper side of the first boom 505 so as to vertically overlap with the upper side of the first boom 505. Stored. As can be seen from FIG. 9, the first boom 505 and the second boom 510 are both arranged and stored so as to extend rearward, that is, extend and contract in the same direction.

As shown in FIG. 9, the first and second booms 5
The first and second booms 505 and 510 can be extended to a length corresponding to the entire length of the vehicle body 502 by storing the work tables 05 and 510 and the work table 518, and the maximum height of the entire vehicle can be kept low. it can. In addition, the first boom 505 and the second boom 510 having a large weight are located on the lower side, and the work bench 518 having a small weight is located beside the first and second booms 505 and 510. The center of gravity is lowered to improve vehicle running stability.

The aerial work vehicle 500 constructed as described above
Bridge inspection work or over fence work by
Since the operation is the same as that described with reference to FIG. 3 and can be easily understood by those skilled in the art from the above configuration, the description thereof is omitted.

[0051]

As described above, according to the present invention,
A swivel that is horizontally rotatable on the vehicle body, a first boom that is attached to the swivel at least up and down, and a second boom that is attached at least vertically to the tip of the first boom. A work table attached to the tip of the second boom so as to be swingable up and down. The first boom extends substantially back and forth on the vehicle body and is stored in a downright position.
Since the second boom extends substantially forward and backward on the vehicle body in a folded state in which the second boom is swung by about 180 degrees with respect to the first boom, the second boom is folded down, and the first boom and the second boom are stored.
The length of the boom can be increased to correspond to the longitudinal length of the vehicle body, and the maximum height of the vehicle body in the retracted state can be kept low even if it is lengthened in this way.

[Brief description of the drawings]

FIG. 1 is a side view showing an aerial work vehicle according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the aerial work vehicle according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a working state of the aerial work vehicle according to the first embodiment of the present invention.

FIG. 4 is a side view showing an aerial work vehicle according to a second embodiment of the present invention.

FIG. 5 is a plan view showing an aerial work vehicle according to a second embodiment of the present invention.

FIG. 6 is a side view showing an aerial work vehicle according to a third embodiment of the present invention.

FIG. 7 is a side view showing an aerial work vehicle according to a fourth embodiment of the present invention.

FIG. 8 is a side view showing an aerial work vehicle according to a fifth embodiment of the present invention.

FIG. 9 is a right side view showing an aerial work vehicle according to a sixth embodiment of the present invention.

FIG. 10 is a plan view showing an aerial work vehicle according to a sixth embodiment of the present invention.

FIG. 11 is a left side view showing the aerial work vehicle according to the first embodiment of the present invention.

[Explanation of symbols]

2,102,202,302,402,502 Body 4,104,204,304,404,504 Swivel 5,105,205,305,405,505 First boom 10,110,210,310,410,510 Second
Boom 18, 118, 218, 318, 418, 518 Workbench

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] January 7, 2002 (2002.1.7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction contents]

In the aerial work vehicle 500 constructed as described above, which is referred to as a bridge inspection work or overfence, the aerial work equipment is stored (the front and rear wheels 503a, 503a).
The state in which the vehicle travels on the road according to 503b) is shown in FIGS. As can be clearly seen from this figure, the first boom 505 extends substantially back and forth along the vehicle body 502 and is stored in a lying down position, and the second boom 510 is raised upward to nearly 180 degrees with respect to the first boom 505. The work table 518 is swung so as to be bent and stored in parallel with the upper side of the first boom 505 so as to vertically overlap with the upper side of the first boom 505. Stored. As can be seen from FIG. 9, both the first boom 505 and the second boom 510 are arranged and stored so as to extend forward, that is, extend and contract in the same direction.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F333 AA11 AC08 BB03 BB09 BB26 BD02 CA04 DA02

Claims (7)

[Claims] 1. A vehicle capable of traveling, a swivel arranged horizontally turnable on a vehicle body of the vehicle, a first boom attached to the swivel at least so as to be able to move up and down, and a first boom A second boom attached to a tip of the second boom so as to be swingable up and down, and a work table attached to a tip of the second boom so as to be swingable up and down; The second boom is configured to extend substantially forward and backward on the vehicle body in a folded state in which the second boom is swung substantially 180 degrees with respect to the first boom, and is stored in a folded state. An aerial work vehicle characterized by the following. 2. The second swinging member which is swung so as to be bent substantially 180 degrees downward with respect to the first boom below the first boom which is extended and retracted on the vehicle body and stored in a downright position. The altitude according to claim 1, wherein the booms are stored so as to extend in parallel so as to overlap with each other vertically, and the workbench is stored below the second boom. Working vehicle. 3. The second boom swung so as to be bent substantially 180 degrees with respect to the first boom to the side of the first boom which is extended back and forth substantially on the vehicle body and stored in a folded state. Are stored so as to extend in parallel so as to overlap left and right, and the work table is stored below the first boom and the second boom. The aerial work vehicle described. 4. The second boom, which has been swung so as to be bent downward with respect to the first boom, below the first boom which is substantially extended and retracted on the vehicle body and stored in a downright position. The aerial work vehicle according to claim 1, wherein the workbench is stored so as to extend in parallel so as to overlap with the workbench, and the workbench is stored at a side of the second boom. . 5. The second boom that is swung so as to be bent substantially 180 degrees upward with respect to the first boom above the first boom, which extends substantially forward and backward on the vehicle body and is stored in an upright position. The boom is stored so as to extend in parallel so as to overlap vertically, and the work table is stored while being positioned on the second boom. In the storage state, the first boom and the second boom are stored. The aerial work vehicle according to claim 1, wherein the booms are configured to have the same direction of expansion and contraction. 6. The second boom that is swung so as to be bent substantially 180 degrees upward with respect to the first boom above the first boom, which extends substantially back and forth on the vehicle body and is stored in an upright position. The boom is stored so as to extend in parallel so as to overlap vertically, and the work table is stored along the side of the second boom. In the storage state, the first boom and the second boom are stored. The aerial work vehicle according to claim 1, wherein the booms are configured to have the same direction of expansion and contraction. 7. A holder member is attached to a tip end of the first boom so as to swing up and down, and the second boom is supported by the holder member so as to be movable in an axial direction. A boom moving means is attached to the tip of the first boom so as to be swingable up and down, and has a boom moving means for moving the entire second boom in the axial direction with respect to the holder member, and is moved by the boom moving means. The aerial work vehicle according to any one of claims 1 to 6, wherein the second boom is configured to be capable of extending and contracting from full contraction to full extension at an arbitrary moving position determined by the operation.