JPH08113478A - Elevated spot working vehicle - Google Patents

Abstract

PURPOSE: To obtain an elevated spot working vehicle, wherein the outside dimension of the vehicle body in the boom housing state can be decreased, and a boom having the long total length can be arranged without interference of the boom with a jack device in housing the boom. CONSTITUTION: When a boom 13 so arranged as to be derricked and turned is housed on a load-carrying platform 11a, the boom tip is positioned near the end of either right or left parts on the front end of the load-carrying platform 11a. An outrigger jack 19, etc., are arranged on the right and left ends near the front end of the load-carrying platform 11a by being deviated in the longitudinal direction. The outrigger jack 19' near which the boom tip is positioned is arranged on the front end side of the load-carrying platform 11a. Therefore, the housing space in the load-carrying platform 11a can be occupied in housing the boom, and the length of the boom 13 to be arranged can be increased.

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 in which a boom which can be freely actuated such as ups and downs is arranged on a vehicle body which can travel freely.

[0002]

2. Description of the Related Art As an aerial work vehicle in which a work platform is installed at the tip of a boom that can be raised and retracted to move an operator to a desired height, a driving cabin is arranged in front of the vehicle body. In some cases, a luggage carrier is installed behind the vehicle body. A swivel is installed on this platform,
A telescopic boom is arranged on the swivel so that it can be raised and lowered. Then, a work platform on which a worker can ride is provided at the tip of the telescopic boom, and the worker is moved to a desired high place by performing ups and downs, extension and retraction of the boom.

In such an aerial work vehicle, jack devices are provided on the front, rear, left and right sides of the vehicle body in order to ensure the stability of the vehicle body during boom operation. This jack device is arranged so that it can be expanded and contracted downwards toward the bottom of the vehicle body, and by extending the downwards until the ground reaction force is obtained, it acts in the direction in which the vehicle body falls over during boom operation. This is to stably support the vehicle body against a moment (hereinafter referred to as “overturning moment”). And
For this jack device, an outrigger jack device that is configured to be expandable / contractible in the width direction of the vehicle body in order to support the vehicle body more stably may be used.

The left and right outrigger jack devices are paired, and the pair of outrigger jack devices are arranged at the front and rear ends of the luggage carrier. Here, in each of the outrigger jacks forming the pair of jack devices, an outrigger beam that expands and contracts with respect to the vehicle body (cargo) is formed with a predetermined length, and a hydraulic cylinder or the like for expanding and contracting is provided. Therefore, they are arranged so as to be displaced in the front-rear direction (alternately).

After the work is completed, the boom is laid down and retracted to maintain the stability of the aerial work vehicle during traveling. Here, in order to maintain the stability of the vehicle body during traveling and to reduce the parking space during parking, it is preferable that the total height H is as low as possible. For this reason,
When the boom is stowed, the height to the upper part of the workbench can be kept low if the boom is laid down on the platform until the angle of the boom becomes a depression angle. In this case, in order to store the boom efficiently on the loading platform, the swivel base is swung slightly so that the tip of the boom is located near one of the front, rear, left, and right ends.

[0006]

Since the outrigger jack device for an aerial work vehicle constructed as described above requires a predetermined stroke in the vertical direction, the outrigger in the vicinity of where the boom tip is located. There is a problem in that the upper end of the jack may interfere with the tip of the boom, making it impossible to dispose a long boom.

The present invention has been made in view of the above problems, and is an aerial work vehicle capable of reducing the outer dimensions of the vehicle body in the boom retracted state, and interferes with the jack device when the boom is retracted. It is an object of the present invention to provide an aerial work vehicle in which a boom having a long overall length can be arranged without any problem.

[0008]

In order to achieve the above object, an aerial work vehicle of the present invention has an operating cabin at the front of the vehicle body and a loading platform at the rear of the vehicle. Behind the platform, there is a boom that can be lifted and swung freely, and has a depression angle and is stored in a collapsed storage state.
Further, at least near the front end portion of the loading platform, a front jack device constituted by a pair of left and right outrigger jacks that can expand and contract from inside the loading platform to the side of the loading platform is disposed. The pair of outrigger jacks are arranged so as to be displaced in the front-rear direction of the vehicle body, and when the tip of the boom is located near either one of the left and right ends of the front end of the loading platform when the boom is folded and stored, An outrigger jack whose upper end is located in the vicinity of the tip is disposed on the front side of the luggage carrier.

In the aerial work vehicle constructed in this manner, the boom is pivotally supported by the swivel base and disposed in front of or behind the load platform, and the boom is laid down at an angle of depression, so that either of the left and right sides of the front end portion of the load platform is lowered. Even when the jack is located near the end of the jack, it is possible to take a long distance from the tip of the boom where the upper end of the jack device is close to the swivel base (when the load carrier is a square, the length is almost diagonal). it can. As a result, the length of the boom to be arranged can be increased, so that the work range during boom operation does not become narrow while reducing the outer dimensions of the vehicle body when the boom is stored.

Further, in an aerial work vehicle in which the center of rotation of the swivel base is disposed in front of the load platform, and the rear jack device configured similarly to the front jack device is disposed near the rear end of the load platform. If the boom tip is in the stowed state and the tip of the boom is located near either the left or right end of the rear end of the platform, the outrigger jack whose upper end is located near the tip of the boom is placed on the platform. By arranging it on the rear side, the length of the boom can be increased in the same manner as described above, and the work range at the time of boom operation is not narrowed while reducing the outer dimensions of the vehicle body when the boom is stored.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to FIG.
The description will be made with reference to FIG. This aerial work vehicle 1
0 has a driving cabin C arranged in the front part of a vehicle body 11 and a loading platform 11a arranged in the rear part thereof. On the loading platform 11a, a swivel platform 12 which is capable of horizontally swiveling with respect to the vehicle body 11 is attached. Here, the swivel base 12 is disposed such that the swivel center S is located rearward of the center K of the rear axle that supports the rear wheel R for traveling the vehicle body 11.

On the upper part of the swivel base 12, there is a boom 1 which is telescopically (nestedly) telescopically movable.
The undulating cylinder 15 is pivotally attached to the undulating cylinder 15 so that the undulating operation can be performed. The expansion / contraction operation of the boom 13 is performed by the expansion / contraction operation of an expansion / contraction cylinder (not shown) arranged in the boom 13. Furthermore, at the tip of the boom 13,
A vertical post 1 that always maintains a vertical state by a leveling mechanism (not shown) regardless of the hoisting angle of the boom 13.
6 are provided. An arm member 17 is attached to the vertical post 16 so as to be horizontally swiveled, and a work table 14 on which an operator can ride is attached to the arm member 17 so as to be horizontally swiveled.

At the time of working at a high place, as shown by a chain double-dashed line in FIG.
By performing the turning operation, it is possible to move the worker who is on the workbench 14 to a desired high place. Then, by performing the turning operation of the arm member 17, it is possible to perform fine adjustment of the movement position of the workbench 14 after it is moved to a high place.

In the aerial work vehicle 10 configured as described above, the outrigger jacks 19 are arranged at four positions on the front, rear, left and right of the luggage carrier 11a in order to ensure the stability of the vehicle body 11 during aerial work. ing. This outrigger jack 1
9 is configured to be expandable / contractible toward the side of the loading platform 11a (vehicle body 11) and expandable / contractible downward (toward the ground). Then, when the boom 13 is used, each outrigger jack 19 is extended toward the side of the vehicle body as shown by a chain double-dashed line in FIG. 1 and is moved downward as shown by a chain double-dashed line in FIG. By extending and grounding the jack 19, the vehicle body 11 is stably supported.

This jack device comprises a pair of left and right outrigger jacks 19 and 1 arranged at the front end of the loading platform 11a.
9'and a pair of left and right outrigger jacks 19 ", 19"'disposed at the rear end of the luggage carrier 11a. Since these outrigger jacks 19 and the like have the same structure, The configuration of the outrigger jack 19 arranged on the left side of the front end will be described as an example.

The outrigger jack 19 includes an outrigger box 19a provided on the carrier 11a, an outrigger beam 19b slidably disposed in the outrigger box 19a, and an outer post 19c vertically attached to the outrigger beam 19b. The inner post 19d is formed so as to be capable of expanding and contracting downward with respect to the outer post 19c, and the ground plate 19e attached to the lower end portion of the inner post 19d. A pair of left and right outrigger jacks 19 arranged at the front end,
The outrigger boxes 19a and the like of 19 'are disposed so as to be exposed to the luggage carrier 11a, and the pair of left and right outrigger jacks 19 ", 19"' disposed at the rear ends of the luggage carrier 11a are inside the luggage carrier 11a. It is installed in.

Here, the outrigger beam 19b is formed to have a predetermined length, and a telescopic cylinder (at the rear end portion) for extending the outrigger beam 19b (extending outrigger beam 19b) with respect to the outrigger box 19a. (Not shown) is provided, the space in the length direction (width direction of the loading platform 11a) required for the placement of the outrigger jacks 19 is at least half the width of the loading platform 11a.
Therefore, each outrigger jack 19 at the front end portion,
19 'are arranged so as to be displaced in the front-rear direction. Further, the outer post 19c and the inner post 19d are arranged such that the upper end portion of the outer post 19c projects from the upper surface of the luggage carrier 11a in order to obtain a predetermined minimum ground clearance and a predetermined amount of extension when stored.

In the aerial work vehicle 10 thus constructed, in order to put the boom 13 in the retracted state after the work is completed,
The boom 13 is contracted, and the front of the boom 13 is lowered until it falls (having a depression angle). At this time, the swivel base 12 is slightly swiveled to the right so that the tip of the boom 13 (the position where the vertical post 16 is attached) is located in front of the cargo bed 11a on the right front side (so as to be substantially diagonal to the cargo bed 11a). When the boom 13 is stored,
Further, the arm member 17 is rotated to the left and the workbench 1
Turn 4 also to the left so that it is substantially parallel to the boom 13. As a result, the boom 13 and the workbench 14 are in the most compact state in a plan view in the retracted state, and are positioned inside the cargo bed.

Therefore, the outrigger jack 19 'at the right front end of the platform 11a on the side where the tip of the boom 13 is located in the aerial work vehicle 10 is disposed in front of the outrigger jack 19 at the left front end. Has been done. Therefore,
Since the front right cargo bed on the cargo bed 11a can be widened without the front end of the boom 13 and the outer post 19c 'interfering with each other, the boom 13 arranged on the vehicle body 11 can be taken.
The length of can be increased. Further, since the boom 13 can be stored while the front of the boom 13 is lowered, even if the workbench 14 is disposed at the tip of the boom 13 via the vertical post 16, the storage is performed. The total height of the aerial work vehicle 10 in the state can be kept low.

In the above embodiment, the boom 13
The case where the tip of the boom is located at the right front end of the luggage carrier 11a has been described. However, when the tip of the boom 13 is located at the left front end, the outrigger jack 19 arranged at the left front end is located forward. It should be done. Further, in the above-described embodiment, when the tip of the boom 13 is located at the left or right front end, the outrigger jacks 19 ", 19"'are also provided near the rear end of the luggage carrier 11a. However, in the present invention, it is not always necessary to dispose the outrigger jacks at the front, rear, left, and right ends of the loading platform, and at least when the boom 13 is folded and stored.
It suffices if the outrigger jack is arranged on the side where the tip end of the is located.

Further, in the above embodiment, the swivel base 1
2 is arranged behind the platform 11a, the present invention is not limited to such a case, and as shown in FIG. 3, the swivel base 12 is disposed in front of the platform 21a,
The aerial work vehicle 20 may be configured such that the front end portion of the boom 13 is located behind the load platform 21a. In this case, the outrigger jack 19 ″ on the side where the tip of the boom 13 is located may be located behind the luggage carrier 21a.
Also in this case, the front outrigger jacks 19 and 19 'are not always necessary, as in the above case.

[0022]

As described above, the aerial work vehicle of the present invention is
When the boom, which is freely undulated and swiveled on the platform, is stored, the boom tip is located near either the left or right end of the front end of the platform. A front jack device consisting of a pair of outrigger jacks is arranged at least to the left and right of the front end of the load platform in the front-rear direction. Has been done. As a result, when the boom is stowed and stowed, a large storage space can be secured in the loading platform, so that the boom to be installed can be lengthened without the boom tip portion and the jack device interfering with each other. Therefore, a wide range of work can be performed, and the outer dimensions of the vehicle body can be reduced during storage.

Further, when the swivel base is provided in front of the loading platform and the boom is disposed rearward of the loading platform, at least the boom tip of the rear jack device disposed near the rear end of the loading platform is in the vicinity. By disposing the outrigger jack located at the rear side of the luggage carrier, the length of the boom to be disposed can be increased similarly to the above, and the outer dimension of the vehicle body can be reduced when the boom is stowed and stored. .

[Brief description of drawings]

FIG. 1 is a top view of an aerial work vehicle according to the present invention.

FIG. 2 is a side view of the aerial work vehicle.

FIG. 3 is a top view of another aerial work vehicle according to the present invention.

[Explanation of symbols]

 10 High-altitude work vehicle 11 Vehicle body 12 Swivel base 13 Boom 14 Work platform 15 Lifting cylinder 16 Vertical post 17 Arm member 19 Outrigger jack

Claims (2)

[Claims] 1. A vehicle body in which a driving cabin is arranged in the front part and a cargo bed is arranged in the rear part so that the vehicle body can travel freely; a swivel base which is swivelly arranged on the cargo bed; A boom that is freely arranged and that is stored while lying down with a depression angle, a work platform that is horizontally swingably mounted on the boom, and at least in the vicinity of the front end of the cargo bed to stably support the vehicle body. In the aerial work vehicle consisting of a front side jack device composed of a pair of left and right outrigger jacks that are expandable from the inside of the platform to the side of the platform and are displaced in the longitudinal direction of the platform, The swivel center of the swivel base is located behind the cargo bed, and the tip of the boom is located near the right front end or the left front end of the cargo bed in the collapsed and stored state. Aerial wherein said outrigger jack located the upper portion near the tip of the boom is arranged on the front side of the loading platform in collapsed stored state. 2. A vehicle body in which a driving cabin is arranged in the front part and a cargo bed is arranged in the rear part so that the vehicle body can travel freely; a swivel base which is swivelly arranged on the cargo bed; A boom that is freely laid and has a depression angle and is stowed and stored; a work platform that is horizontally rotatably mounted on the boom; and at least a rear end portion of the loading platform for stably supporting the vehicle body. An aerial work vehicle comprising a rear jack device composed of a pair of left and right outrigger jacks arranged in the vicinity of the cargo bed so as to be capable of expanding and contracting laterally of the cargo bed and displaced in the longitudinal direction of the cargo bed. The swivel center of the swivel base is located in front of the cargo bed, and the tip of the boom is located near the right rear end or the left rear end of the cargo bed in the state where the boom is stowed and stored. In the jack device, Aerial said outrigger jack upper end to the vicinity of a leading end portion of the boom collapsed stored state is positioned is equal to or disposed on the rear side of the loading platform.