JP3269754B2 - Aerial work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an aerial work vehicle. That is, the present invention relates to an aerial work vehicle in which a work platform is mounted on a chassis so as to be able to move up and down.

[0002]

2. Description of the Related Art High-altitude work targeting columnar structures,
For example, the joining and assembling work of columns and beams at the indoor building site of a steel building, the painting, spraying, interior work, electric wiring work, air conditioning duct and piping work on the pillars, etc. Was done like that. FIG. 5 is a schematic perspective view for explaining a conventional example of this kind. FIG. 5A shows an example in which a work table is directly mounted as a scaffold, and FIG. 5B shows an example in which an aerial work vehicle is used. That is, the above-mentioned work at a high place where the columnar structure A such as the column is to be worked is conventionally performed by first using FIG.
As shown in FIG. 1A, the work table 1 is attached as a scaffold to the columnar structure A to be worked, and from above the work table 1, an operator performs a high-level work on the columnar structure A. I was However, in the case of the conventional example in which the work table 1 is directly attached to the columnar structure A, it is necessary to first provide a hook 2 or the like for attaching the work table 1 to the columnar structure A in advance. It is necessary to assemble such a work table 1 before the work at a high place, and furthermore, it is necessary to disassemble and remove the work table 1 after the work at a high place.
It requires a lot of labor and labor, is very troublesome and troublesome, and a problem has been pointed out in terms of work efficiency.

Recently, as shown in FIG. 5 (2), an aerial work vehicle 3 is being developed and used. The aerial work vehicle 3 has a structure in which a rectangular work table 5 such as a rectangle is assembled on a chassis 4 so as to be able to move up and down by a lifting mechanism 6. By performing the aerial work on the columnar structure A using such an aerial work vehicle 3, FIG.
(1) As shown in FIG. 5 (1), the labor and labor for attaching the hooks 2 and the like, assembling, dismantling, and removing the work table 5, which are pointed out in the conventional example of this type, are no longer required, and FIG. The problem of work efficiency pointed out in the conventional example is solved. B in FIG. 5 (2) shows a joint to be worked on the columnar structure A such as a column.

[0004]

The following problems have been pointed out in such a conventional example. That is, when working at heights using the aerial work vehicle 3, the aerial work vehicle 3 has a rectangular work with respect to one surface of the columnar structure A to be worked, as shown in FIG. One side of the table 5 is positioned at the corresponding position, and from such a work table 5, a worker is performing an altitude work on the columnar structure A to be worked. As described above, in the conventional aerial work vehicle 3, the aerial work can be performed only on one surface of the columnar structure A, that is, only from one direction. Therefore, in the conventional example using the aerial work vehicle 3, in order to perform the aerial work on three or four surfaces around the columnar structure A to be worked, that is, in three directions, four directions. In order to carry out the high-altitude work, the one high-altitude work vehicle 3 is sequentially moved or a plurality of high-altitude work vehicles 3 are required. As described above, when working on the columnar structure A using the conventional aerial work vehicle 3, the surrounding work 3
It is not possible to work on the surface and the four surfaces simultaneously, that is, from the three directions and the four directions, so that the time loss for the aerial work vehicle 3 to move sequentially and the preparation of a plurality of the aerial work vehicles 3 However, problems were pointed out in terms of cost and the like, and work efficiency was problematic in this respect.

The present invention has been made in view of such circumstances, and has been made in order to solve the problems in the above conventional example.
First, by forming a recess on one side of the worktable,
Higher work from at least three sides and three directions is possible,
Secondly, by forming a concave portion in the chassis, secondly, an interference with the chassis is reliably prevented, and thirdly, the first and second can be easily and easily realized. With the goal.

[0006]

The technical means of the present invention for solving such a problem is as follows. That is, in this aerial work vehicle, in a aerial work vehicle in which a work platform is mounted on a chassis so as to be able to ascend and descend by an elevating mechanism, the work platform has a quadrangular shape and has a columnar shape to be worked on one side. A notch having a width large enough to penetrate the structure up and down is formed. The chassis is formed with a concave portion through which the columnar structure to be worked is inserted vertically without interfering.

Therefore, when performing high-altitude work with this high-altitude work vehicle, the column is moved and positioned so that the columnar structure is inserted into the concave portion of the work table, and the work table is placed at a high position on the columnar structure. Raise or lower to the required height for your work. Then, the work at a high place is performed on the columnar structure to be worked from the workbench, and the work at a high place can be performed on at least three surfaces of the columnar structure from the corresponding three directions. With this,
Since the undercarriage is formed in the undercarriage, it is possible to reliably prevent the undercarriage from interfering with the columnar structure to be worked during high-altitude work.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1, FIG. 2,
3 (2) and FIG. 4 are provided for explaining the embodiment of the present invention, FIG. 1 is a schematic perspective view of the whole, and FIG.
FIG. 2 (2) is a perspective view of a main part of an example in which a handover plate is provided.
FIG. 3 (2) is a schematic side view of a vertical lift type example in which a recess is formed in a chassis. FIG. 4 is a schematic side view of a mast type aerial work vehicle. FIG. 3A is a schematic side view showing a reference example which does not belong to the present invention and in which a chassis is set short.

First, the aerial work vehicle 7 will be generally described. In this type of aerial work vehicle 7, a work platform 9
Is assembled so as to be able to move up and down by a lifting mechanism 6. First, the crawler 8 uses the crawler 10 as its running means as shown in FIGS. 1, 2 and 3, or the wheels 11 as its running means as shown in FIG. The left and right crawlers 10 are endless. The left and right sides of the chassis 8 are respectively extended between front and rear driving wheels and driven wheels, and the driving wheels are driven by a driving motor or the like to travel. The wheels 11 shown in FIG. 4 include front, rear, left and right drive wheels and driven wheels below the chassis 8, and the drive wheels are driven by a drive motor or the like to travel. It is to be noted that a type using a wheel 11 including only a free wheel without a drive wheel having a drive motor or the like is also possible.

The lifting mechanism 6 interposed between the chassis 8 and the work table 9 includes a bending type shown in FIGS. 1, 2 and 3, a mast type shown in FIG. Those of the formula (not shown) are typically used. First, the refraction type lifting mechanism 6 has a structure in which the upper and lower booms 12 are pivotally connected between the work table 9 and the chassis 8 with a horizontal shaft via upper and lower mounts 13 and intermediate brackets 14 and the like. Consisting of Then, the upper and lower booms 12 are raised and lowered in synchronization with a lift cylinder (not shown) which is driven to expand and contract, so that the work table 9 is constantly maintained in a horizontal state, while FIGS. (1) is moved up and down between the ascending position shown in FIG. 3 and FIG. 3 and the descending position shown in FIG. 2 (2).
It consists of a vertical lift type.

Next, the mast-type elevating mechanism 6 shown in FIG. 4 has three vertical upper and lower masts 15 arranged between the work table 9 and the chassis 8 and a cylinder between the masts 15. It has a nested structure and can be extended and contracted vertically as a whole. The upper and lower masts 15 are extended and extended with respect to the lower masts 15 and stored and shortened by their own weights by a lift cylinder (not shown) which is driven to expand and contract. Numeral 9 is a vertical lift type which is raised and lowered between a raised position and a lowered position (not shown) while always maintaining a horizontal state. Further, in the scissor-type elevating mechanism, a link rod is pivotally mounted between the worktable 9 and the chassis 8 while crossing the upper and lower stages on the left and right, respectively. By displacing the link rods between a state of being expanded into a parallelogram and a state of being folded by means of a cylinder that is driven to expand and contract, the workbench 9 can maintain the horizontal position at all times while maintaining the horizontal position. It consists of a vertical lifting type, which is raised and lowered between the descending positions.
As a lifting mechanism, such a refraction type, a mast type, and a scissors type are typical. The aerial work vehicle 7 is generally like this.

Hereinafter, the aerial work vehicle 7 according to the present invention will be described. The work table 9 of the aerial work vehicle 7 has a rectangular shape, and a notch 16 is formed on one side of the work table 9 having a width capable of vertically penetrating the columnar structure A to be worked. .

These will be described in more detail. As shown in FIGS. 1 and 2, the floor of the work table 9 has a square or rectangular shape such as a square or a rectangle, and its front-rear dimension, left-right dimension, and width are the front-rear dimension of the chassis 8. Various dimensions and widths that are about the same as or larger than the left and right dimensions and widths are conceivable. With respect to the floor of such a work table 9, the notch-shaped concave portion 16 has a notch wider than the columnar structure A to be worked, that is, a notch wider than the cross section of the columnar structure A. With space. In the illustrated example, such a recess 16 is formed at the center of the front side, which is one side of the work table 9, and the opening end thereof is located at the front center of the work table 9.

In the example shown in FIG. 1, the shape of the concave portion 16 is a square corresponding to the cross-sectional shape of the columnar structure A to be worked, but as long as the columnar structure A can be inserted vertically.
Instead of a square, a rectangle and other shapes are also conceivable. For example, as shown in FIG. 2A, a recess 16 of a type into which a columnar structure A to be worked is inserted may be provided on the inner side of the rectangle. Further, in the example of FIG. 1, the concave portion 16 is formed on the front side, which is one side of the work table 9.
The formation position is not limited to this. That is, the side of the work table 9 where the concave portion 16 is formed is not limited to the front side, but may be the rear side, the left side, or the right side.

The work table 9 shown in FIG. 2A is further provided with a transfer plate 17 which can be bridged between the open ends of the recesses 16. That is, the recess 16 of the worktable 9 is provided with the columnar structure A to be worked as described above.
Has a rectangular shape penetrating the back side, and a transfer plate 17 can be bridged across the opening end side opposite to the back side.
The length of the transfer plate 17 is large enough to be bridged between the open ends, and the width of the transfer plate 17 is large enough for an operator to ride on a high place. Also, this transfer plate 17
Is positioned immovably in use by one end being pivotally attached to the edge of the recess 16 by a hinge or the like, or both ends being fitted into a shallow step formed at the edge of the recess 16 from above. It is fixed and can be stored and removed when not in use.

Further, in the aerial work vehicle 7 of the reference example (not belonging to the present invention) shown in FIG. 3A, the size of the undercarriage 8 is the same as that of the columnar structure A to be worked. To avoid interference
It is set short. On the other hand, in the aerial work vehicle 7 of the present invention shown in FIG. 3 (2), the columnar structure A to be worked is inserted into the chassis 8 up and down without interference. , A concave portion 18 is formed. That is, as described above, the front-rear dimension and the left-right dimension of the worktable 9 are equal to or larger than the front-rear dimension and the left-right dimension of the chassis 1, but the recess 16 is formed in the worktable 9 as described above, and When the columnar structure A is inserted, the lower portion of such a columnar structure A often interferes with the chassis 8 as it is. Therefore, in the present invention, in such a case, (2) in FIG.
As shown in the drawing, the overall size of the chassis 8 is kept as it is, but a recess 18 similar to the recess 16 of the worktable 9 described above is formed on one side (front side in the illustrated example) of the chassis 8. It has become. Of course, when the concave portion 16 of the work table 9 is formed not on the front side but on the rear side, left side or right side as in the illustrated example, such dimensions of the chassis 8 are also considered for the rear side, left side and right side. Similarly, the concave portion 18 of the chassis 8 is formed on the rear side, the left side, and the right side.

In FIGS. 1, 3, and 4, reference numeral 19 denotes a handrail. The handrail 19 is provided upright on the periphery of the work table 9 to prevent a worker from falling off the work table 9. To work. In FIG. 1, the front side of the worktable 9 and the recess 16
The peripheral handrails 19 are not shown in the figure, but handrails 19 are provided at these locations as needed. In FIG. 2, illustration of such a handrail 19 is omitted at all. Also, to describe the columnar structure A to be worked, the cross-sectional shape is typically a square shape as shown in the figure, but a rectangular shape, a circular shape, and other various shapes are also conceivable. Recess 16 of worktable 9
Also, the shape of the concave portion 18 of the chassis 8 corresponds to these. The dimensions of such a columnar structure A to be worked are:
For example, the size is about 1 m square, and the dimensions of the concave portion 16 of the work table 9 and the concave portion 18 of the chassis 8 are set correspondingly.

The present invention is configured as described above. Then, it becomes as follows. This aerial work vehicle 7
For example, at an indoor building site of a steel building, the vehicle runs on a temporary deck plate serving as a temporary floor plate of each floor, and joints B of columnar structures A to be worked, such as columns and beams (see FIG. 5 (2)). It is used when performing a joining operation, an assembling operation, and the like. Of course, in addition to this, it is also used for painting, spraying, interior work, electric wiring work, air conditioning duct / pipe work, etc. for the columnar structure A to be worked such as a pillar.

When performing high-altitude work with the high-altitude work vehicle 7, first, the platform 8 is run, and the work platform 9 is raised and lowered by the lifting mechanism 6. Thus, the work table 9 is positioned corresponding to the columnar structure A to be worked, and the recess 1 of the work table 9 is formed.
6 is positioned and set in a planar positional relationship in which the columnar structure A is inserted, and the work table 9 is set to a height level necessary for working on the columnar structure A at a high place. Then, from such a work table 9, a worker operates the columnar structure A to be worked.
Is carried out at a high place.
By interposing 6, the columnar structure A can be implemented from at least three directions from three directions.

In the example shown in FIG. 2 (1), furthermore, by passing the transfer plate 17 between the open ends of the recesses 16 of the worktable 9, such a work at a high place can be performed. The columnar structure A can be implemented from four directions on four surfaces thereof. Also, the refraction type lifting / lowering mechanism 6 shown in FIGS.
The mast-type lifting mechanism 6 further comprises a vertical lifting type,
The work table 9 is raised and lowered in a horizontal state. Therefore, when working at heights, first, as indicated by the solid line in FIG.
At the lowered position on the ground side, the platform 8 was moved and positioned so that the columnar structure A to be worked was inserted into the recess 16 of the platform 9, and the operator got on and off the platform 9. Thereafter, the work table 9 is raised by the elevating mechanism 6 to the ascending position indicated by the imaginary line in FIG. 2B, whereby the work at a high place is smoothly performed. Then, as shown in FIG. 3 (2), a concave portion 18 into which the columnar structure A to be worked is inserted is formed in the undercarriage 8, so that the lower part of the undercarriage 8 is used as a work object when working at a high place. Interference with the columnar structure A is surely prevented.

Then, in this aerial work vehicle 7, the following first, second, third, fourth and fifth conditions are obtained.
First, when the aerial work vehicle 7 is used, a columnar structure A such as a pillar to be worked is moved from the worktable 9 to the recess 1.
Through the work 6, work at a height from at least three directions corresponding to at least three surrounding surfaces can be performed simultaneously or concurrently. In addition, as shown in FIG. 2A, in the case where the transfer plate 17 is provided, the transfer plate 17 is
By bridging between the open end side of the concave portion 16 of the worktable 9, the concave portion 16 and the transfer plate 1
Through 7, work at heights from four directions corresponding to the four surfaces on the entire circumference can be performed concurrently or sequentially.

Further, as shown in FIGS. 1, 2, 3, and 4, by using a vertical lifting mechanism 6 together, the aerial work vehicle 7 can be operated first on the ground side. After the positioning of the recess 16 of the work table 9 with respect to the target columnar structure A and the climbing of the worker on and off the work table 9, the work is elevated as it is, so that work at a higher place can be performed more smoothly. Next, as shown in FIG. 3 (2), a recess 18 is also formed in the chassis 8 so that
The columnar structure A to be worked is inserted into the concave portion 16 of the worktable 9, and even if the overall size and the width of the worktable 9 are close to the undercarriage 8, the columnar structure A to be worked is The contact and the interference with are surely prevented.

Third, the first and second points described above are easily and easily realized. First, the above-mentioned work at a high place on the first three surfaces is easily realized by a simple configuration in which the recess 16 is formed in the work table 9. In addition, in order to prevent the above-mentioned second chassis 8 from interfering with the columnar structure A to be worked, a concave portion 18 is provided in advance in the design stage at a location where the design can be easily changed at the center.
Can be easily realized with a relatively simple configuration.

[0024]

As described above, the aerial work vehicle according to the present invention exhibits the following effects by forming the recess on one side of the worktable. First, at least three sides, three
Work from high directions from different directions is possible. That is, when this aerial work vehicle is used, the aerial work from at least three directions can be performed simultaneously or sequentially on at least three surrounding surfaces of the columnar structure to be worked. As in the conventional example, the work efficiency can be improved, such as reducing the time loss for sequentially moving and eliminating the difficulties in terms of cost for preparing a plurality of units.

Further, the following effects are exhibited by forming the concave portion in the chassis. Second, chassis interference is also prevented. That is, according to the aerial work vehicle, the chassis is reliably prevented from interfering with the columnar structure to be worked.

Moreover, the above-described first and second effects can be realized easily and easily. That is, only by forming a concave portion in the work table and forming a concave portion in the chassis, the configuration is extremely simple and can be easily realized with excellent cost. In this way, all the problems in this type of conventional example are solved,
The effects exhibited by the present invention are remarkably large.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view for explaining an embodiment of an aerial work vehicle according to the present invention.

FIGS. 2A and 2B are views for explaining an embodiment of the present invention, in which FIG. 1A is a perspective view of a main part of an example in which a transfer plate is provided, and FIG. FIG.

FIG. 3A is a schematic side view showing a reference example which does not belong to the present invention, in which a chassis is set shorter than a worktable. FIG. 3B is a diagram illustrating an embodiment of the present invention. FIG. 4 is a schematic side view in which a recess is formed in a chassis.

FIG. 4 is a schematic side view of a mast type aerial work platform for explaining the embodiment of the present invention.

FIGS. 5A and 5B are views for explaining a conventional example of this type, in which FIG. 1A is a schematic perspective view of an example in which a work table is directly attached to a columnar structure to be worked as a scaffold, and FIG. It is a schematic perspective view of the example using a car.

[Explanation of symbols]

 Reference Signs List 1 work table 2 hook 3 aerial work platform 4 undercarriage 5 work table 6 elevating mechanism 7 aerial work vehicle 8 undercarriage 9 workbench 10 crawler 11 wheels 12 boom 13 mount 14 bracket 15 mast 16 recess 17 handover plate 18 recess 19 handrail A Columnar structure B Joint

Claims (1)

(57) [Claims] An aerial work vehicle in which a worktable is mounted on a chassis so as to be able to move up and down by an elevating mechanism, the worktable has a rectangular shape, and a columnar structure to be worked is vertically arranged on one side of the workbench. A notch-shaped recess is formed, and the chassis is formed with a recess which is vertically inserted without interfering with the columnar structure to be worked. , Characterized by aerial work vehicles.