JPH0930785A - Aerial work vehicle - Google Patents

Abstract

(57) [Abstract] First, there is provided an aerial work vehicle capable of performing aerial work from three directions on at least three surrounding surfaces simultaneously or in parallel with respect to a columnar structure to be worked. In addition to the proposal, secondly, it is possible to work in high places from 4 directions on 4 surfaces,
Thirdly, work at height can be performed more smoothly, fourthly, interference between the chassis and columnar structure is prevented, and fifthly, work at height can be realized easily and easily. Also suggest. A first problem is that a recess 16 that can vertically penetrate a columnar structure A to be worked is formed on the front side of a work table 9 or the like, and a second problem is that an opening of the recess 16 is formed. The third problem is that the vertical lifting type lifting mechanism 6 is provided by providing a bridging plate that can be bridged between the end sides, and the fourth problem is that the dimensions of the chassis 8 are set short or The fifth problem can be easily achieved by forming the concave portion also in 8, and the fifth problem can be easily realized by a simple configuration of the concave portion 16, the bridge plate, the elevating mechanism 6, the chassis 8, and the like.

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 workbench is mounted on a chassis so that the workbench can be raised and lowered.

[0002]

2. Description of the Related Art High-altitude work for columnar structures,
For example, the work of joining and assembling pillars and beams at indoor construction sites of steel-framed buildings, as well as painting / spraying / interior work on pillars, electrical wiring work, air-conditioning duct / piping work, etc. It was done like. FIG. 5 is a schematic perspective view for explaining the conventional example of this kind. (1) shows an example in which a workbench is directly attached as a scaffold, and (2) shows an example in which an aerial work vehicle is used. That is, the work at a high place for the columnar structure A such as the column as described above is first performed by the conventional method shown in FIG.
As shown in FIG. 1 (1), the workbench 1 is attached to the work-target columnar structure A as a scaffold, and a worker performs an aerial work on the columnar structure A from this workbench 1. Was there. However, in the conventional example in which the workbench 1 is directly attached to the columnar structure A as described above, first, it is necessary to previously attach the hook 2 or the like for attaching the workbench 1 to the columnar structure A, and It is necessary to assemble such a workbench 1 prior to work at a high place, and further, the workbench 1 must be disassembled and removed after the work at a high place is completed.
It took a lot of time and labor and was very troublesome and troublesome, and a problem in working efficiency was pointed out.

Then, recently, as shown in FIG. 5 (2), the aerial work vehicle 3 is being developed and used. This aerial work vehicle 3 has a structure in which a work table 5 having a rectangular shape such as a rectangle is mounted on a chassis 4 by a lifting mechanism 6 so as to be able to move up and down. Then, by performing the aerial work on the columnar structure A by using such an aerial work vehicle 3, as shown in FIG.
5 (1) shown in FIG. 5 (1), which is pointed out about the conventional example of this kind shown in FIG. 1 (1), which does not require labor and labor such as attachment of the hook 2 and the like, assembly of the workbench 5, disassembly and removal. The problem of work efficiency pointed out in the conventional example is solved. B in FIG. 5 (2) shows a joint portion which is a work target of the columnar structure A such as a column.

[0004]

The following problems have been pointed out in such a conventional example. That is, when performing aerial work using the aerial work vehicle 3, the aerial work vehicle 3 performs a quadrangular work on one surface of the columnar structure A to be worked as shown in FIG. One side of the table 5 is located at a corresponding position, and a worker is working on such a work table 5 at a high position 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, from only one direction. Therefore, in the conventional example using the aerial work vehicle 3, in order to perform the aerial work on the 3rd and 4th surfaces around the columnar structure A to be worked, that is, in the 3rd and 4th directions. In order to carry out aerial work from above, one aerial work vehicle 3 is sequentially moved, or a plurality of aerial work vehicles 3 are required. As described above, when performing work on the pillar-shaped structure A using the conventional work vehicle 3 at a height,
It is not possible to work simultaneously on the surfaces 4 and 4, that is, from 3 directions and 4 directions at the same time, so time loss due to the aerial work vehicles 3 sequentially moving and multiple aerial work vehicles 3 are prepared. Problems were pointed out in terms of the cost for doing so, and from this aspect there was a problem in work efficiency.

In view of the above situation, the present invention has been made to solve the problems in the above-mentioned conventional example.
First, by forming a recess on one side of the workbench,
Work at height from at least 3 surfaces and 3 directions is possible,
The purpose is to propose an aerial work vehicle. In the second aspect, since the bridging plate is further provided, secondly, the four surfaces, the four
It is possible to work from a high place from a direction, and in claim 3, since it is a vertical elevating type, thirdly, work from a high place can be carried out more smoothly. Fourthly, by shortening the size and forming the concave portion, fourthly, interference of the chassis can be surely prevented, and fifthly, the first, second, third and fourth can be easily realized.
The purpose is to propose an aerial work vehicle.

[0006]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
The aerial work vehicle of is an aerial work vehicle in which the work table is mounted on the chassis so that it can be raised and lowered by an elevating mechanism.
In addition to forming a quadrangular shape, a concave portion having a width large enough to vertically insert the columnar structure to be worked is formed in a notch shape on one side thereof. Next, claim 2 is as follows.
That is, the aerial work vehicle according to the second aspect is the aerial work vehicle according to the first aspect, further comprising a bridge plate that can be bridged between the opening end sides of the recesses. Claim 3 is as follows. That is, the aerial work vehicle of claim 3 is
In the aerial work vehicle according to claim 1, further, the lifting mechanism is a vertical lifting type, and the working table is lifted while always maintaining a horizontal state. Claim 4 is as follows. That is, the aerial work vehicle of claim 4 is the aerial work vehicle of claim 1, wherein the size of the chassis is set shorter so as not to interfere with the columnar structure to be worked.
Claim 5 is as follows. That is, the aerial work vehicle according to claim 5 is the aerial work vehicle according to claim 1, further comprising a recess formed in the chassis such that the columnar structure to be worked is vertically inserted without interference. Has been done.

Therefore, when performing work in high places with this work platform for aerial work, the work platform is moved and positioned so that the columnar structure is inserted into the concave portion of the work platform, and the work platform is elevated to the columnar structure. Raise and lower to the level required for work. Then, the work at a high place is performed on the columnar structure to be worked from the work table, and the work at the high place can be performed on at least three surfaces of the columnar structure from the corresponding three directions. According to the second aspect, it is possible to carry out from four directions corresponding to the four surfaces by further straddling the transfer plate. In claim 3, since the workbench is further raised and lowered in a horizontal state, on the ground side,
By positioning the columnar structure so that the columnar structure is inserted into the concave portion and raising and lowering the workbench after getting on and off the worker, it is possible to perform work in high places more smoothly. According to the fourth and fifth aspects of the invention, the chassis is shortened or the chassis is formed with a recess, so that it is possible to reliably prevent the chassis 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 and 4 are provided for explaining the embodiment of the present invention, and FIG.
2 is a schematic perspective view of the whole, FIG. 2 (1) is a perspective view of a main part of an example in which a transfer plate is provided, FIG. 2 (2) is a schematic side view of a vertical lifting type example, and FIG. FIG. 1) is a schematic side view of an example in which the chassis is set short, and FIG. 3B is a schematic side view of an example in which a recess is formed in the chassis. FIG. 4 is a schematic side view of a mast-type aerial work vehicle.

First, the aerial work vehicle 7 will be generally described. In this type of aerial work vehicle 7, the work table 9 is placed on the chassis 8.
However, it is assembled so that it can be raised and lowered by the raising and lowering mechanism 6. First, as for the chassis 8, as shown in FIGS. 1, 2 and 3, the crawler 10 is used as the traveling means, or as shown in FIG. 4, the wheels 11 are used as the traveling means. The crawlers 10 have an endless shape on each of the left and right sides, and are bridged between front and rear drive wheels and driven wheels on the left and right sides of the chassis 8, and the drive wheels are driven by a drive motor or the like to run. Wheels 11 shown in FIG. 4 are composed of front, rear, left and right drive wheels and driven wheels under the chassis 8, and the drive wheels are driven by a drive motor or the like to travel. It is also possible to use a type in which the wheels 11 including only the free wheels are used without providing the drive wheels with a drive motor or the like.

Further, as the lifting mechanism 6 interposed between the chassis 8 and the workbench 9, the refraction type shown in FIGS. 1, 2 and 3, the mast type shown in FIG. 4, and the scissors. Formulas (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 mounted on the horizontal axis between the workbench 9 and the chassis 8 through the upper and lower mounts 13 and intermediate brackets 14 and the like. Consists of. Then, a lift cylinder (not shown) that is driven to extend and retract causes the upper and lower booms 12 to rise and fall in synchronization with each other, so that the workbench 9 is maintained in a horizontal state at all times. 2 is moved up and down between the ascending position shown in FIG. 3 and FIG. 3 and the descending position shown in FIG.
It consists of a vertical lifting type.

Next, in the mast type elevating mechanism 6 shown in FIG. 4, three vertical upper and lower masts 15 are arranged between the workbench 9 and the chassis 8, and a cylinder is provided between the masts 15. It has a nested structure and is vertically expandable. Then, by a lift cylinder (not shown) that is driven to extend and retract, the upper and lower masts 15 are extended and extended with respect to the lower masts 15 and are stored and shortened by their own weight. Reference numeral 9 is of a vertically elevating type which is vertically moved between a rising position and a lowering position (not shown) shown while always maintaining a horizontal state. Further, in the scissor-type lifting mechanism, link rods are pivotally mounted between the workbench 9 and the chassis 8 while crossing the upper and lower stages on the left and right respectively. Then, by using a cylinder that is driven to expand and contract, the space between the link rods is displaced between a state in which the link rods are deployed in a parallelogram and a state in which the link rods are folded, so that the workbench 9 moves to a raised position while always maintaining a horizontal state. It is a vertical lifting type that is lifted between the lowered positions.
As the elevating mechanism, the refraction type, the mast type, and the scissors type are typical. The aerial work vehicle 7 generally has such a structure.

The aerial work vehicle 7 according to the present invention will be described below. The workbench 9 of the aerial work vehicle 7 has a quadrangular shape, and a concave portion 16 having a size capable of vertically inserting the columnar structure A to be worked is formed in a notch shape on one side thereof. .

These will be described in more detail. As shown in FIGS. 1 and 2, the floor of the workbench 9 has a square or rectangular shape such as a square or a rectangle, and its front-rear dimensions, left-right dimensions, and width are the front-rear dimensions of the chassis 8. Various sizes and widths are conceivable, as well as the left and right dimensions, width, etc. In the floor of such a workbench 9, the recessed portion 16 formed in a notch has a width such that the columnar structure A to be worked can be vertically inserted, that is, a notch wider than the cross section of the columnar structure A. It has a 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 open end thereof is located at the center of the front side of the work table 9.

In the example of 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 vertically inserted,
Instead of a square, a rectangle and various other shapes are also possible. For example, as shown in FIG. 2 (1), a recess 16 of the type in which the columnar structure A to be worked is inserted is also possible on the inner side of the rectangle. Further, in the example of FIG. 1, the recess 16 is formed on the front side, which is one side of the workbench 9, but
The formation position is not limited to this. That is, one side of the workbench 9 in which the recess 16 is formed is not limited to the front side, and may be the rear side, the left side, or the right side.

By the way, the workbench 9 shown in FIG. 2A is further provided with a transfer plate 17 which can be bridged between the opening ends of the recess 16. That is, the concave portion 16 of the workbench 9 has the columnar structure A to be worked as described above.
Has a rectangular shape that is inserted into the back side, and a transfer plate 17 can be bridged on the opening end side opposite to the back side.
The length of the bridging plate 17 is large enough to be bridged between the opening end sides, and the width of the bridging plate 17 is large enough to allow an operator to ride and work at a high place. Also, this bridge 17
Has one end pivotally attached to the edge of the recess 16 by a hinge or the like, or both ends are fitted from above to a shallow step formed on the edge of the recess 16 so that the positioning is fixed during use. It is fixed and can be stored and removed as needed when not in use.

Further, the aerial work vehicle 7 shown in FIG. 3 (1).
In this case, the size of the chassis 8 is set shorter so as not to interfere with the columnar structure A to be worked, and in the aerial work vehicle 7 shown in FIG. , More chassis 8
Further, a concave portion 18 is formed in which the columnar structure A to be worked is vertically inserted without interference. That is, as described above, the front and rear dimensions and the left and right dimensions of the workbench 9 are
However, when the recess 16 is formed in the workbench 9 and the columnar structure A to be operated is inserted, as described above, such a columnar structure is left as it is. In many cases, the lower part of A interferes with the chassis 8. Therefore, in such a case, as shown in FIG. 3 (1), the overall size of the chassis 8 (front side of the front-rear dimension in the illustrated example) is set to be short in advance, or as shown in FIG. 3 (2). As shown in FIG. 3, the overall dimensions of the chassis 8 are left unchanged, but one side of the chassis 8 (front side in the illustrated example) is provided with the recess 1 of the work platform 9 described above.
It is advisable to form the concave portion 18 according to 6. Of course, when the recess 16 of the workbench 9 is formed on the rear side, the left side, or the right side instead of the front side as in the illustrated example, such dimensions of the chassis 8 are also considered on the rear side, the left side, or the right side. Similarly, the recess 18 of the chassis 8 is also formed on the rear side, the left side, or the right side.

By the way, in FIG. 1, FIG. 3 and FIG. 4, 19 is a handrail, and this handrail 19 is erected on the periphery of the workbench 8 to prevent a worker from falling off the workbench 8. To function. In FIG. 1, the front side of the workbench 9 and the recess 16
Although illustration of the handrails 19 on the periphery is omitted, the handrails 19 are also provided at these portions as needed. In FIG. 2, illustration of such a handrail 19 is omitted at all. In addition, the columnar structure A to be worked will be described. The cross-sectional shape is typically square as shown in the figure, but rectangular, circular, and other various shapes are also conceivable. Recess 16 of workbench 9
The shape of the recess 18 of the chassis 8 is also adapted to these. The dimension of such a columnar structure A to be worked is
For example, the size is about 1 m square, and the dimensions of the recess 16 of the workbench 9 and the recess 18 of the chassis 8 are set correspondingly.

The present invention is constructed as described above. Then it becomes as follows. This aerial work vehicle 7
For example, in an indoor construction site of a steel frame building, running on a deck plate which is a temporary floor board of each floor, a joint B of a columnar structure A to be worked such as columns and beams (see (2) of FIG. 5), etc. On the other hand, it is used when performing joining work or assembly work. Of course, in addition to this, it is also used for painting / spraying / interior work, electrical wiring work, air-conditioning duct / piping work, etc. for a pillar structure A to be worked such as a pillar.

When performing work at a high place with the work vehicle 7 at a high place, first, the chassis 8 is moved and the work platform 9 is moved up and down by the elevating mechanism 6. Accordingly, the workbench 9 is positioned corresponding to the columnar structure A to be worked, and the recess 1 of the workbench 9 is
The columnar structure A is positioned and set in 6 in a planar positional relationship in which the columnar structure A is inserted, and the workbench 9 is set at a height level required for work on the columnar structure A at a high place. Then, from the work table 9 as described above, the worker can work on the columnar structure A to be worked.
Work is performed on the aerial part of the recess 1
By interposing 6, the columnar structure A can be implemented from at least three surfaces in three directions.

Further, in the example of FIG. 2A,
By straddling the bridge plate 17 between the open end sides of the concave portions 16 of the workbench 9, it is possible to perform such high-altitude work on the columnar structure A to be worked from four directions on its four surfaces. Become. Further, the bending type lifting mechanism 6 of FIGS. 1, 2 and 3 and the mast type lifting mechanism 6 of FIG. 4 are further vertical lifting types, and the workbench 9 is raised and lowered in a horizontal state. Therefore, when working at a high place, first, as indicated by the solid line in FIG. 2B, the columnar structure A to be worked is inserted into the recess 16 of the workbench 9 at the descent position on the ground side. After moving and positioning the chassis 8, and getting on and off the worker on and from the work table 9, the work table 9 is shown as it is by the elevating mechanism 6 and is indicated by an imaginary line in FIG. By raising to the raised position, work in high places can be performed smoothly. Further, in the aerial work vehicle 7 shown in FIGS. 3 (1) and 3 (2), the dimension of the chassis 8 is set to be short, or the recess 18 into which the columnar structure A to be worked is inserted is inserted into the chassis 8. Therefore, it is possible to reliably prevent the lower portion of the chassis 8 from interfering with the columnar structure A to be worked during the work at a high place.

Then, in this aerial work vehicle 7, the following first, second, third, fourth and fifth operations are performed.
First of all, when this aerial work vehicle 7 is used, with respect to the columnar structure A to be worked such as a pillar, the work table 9 is depressed to the concave portion 1
By means of 6, it is possible to carry out work in high places from at least three directions corresponding to at least the three surfaces around it at the same time in parallel or sequentially. Secondly, as shown in FIG. 2 (1), when the transition plate 17 is provided, the transition plate 17
Are suspended between the opening ends of the recesses 16 of the workbench 9 so that the columnar structure A to be worked is interposed between the recesses 16 and the transfer plate 17 from four directions corresponding to the four surfaces of the entire circumference. It is possible to carry out high-altitude work in parallel or sequentially.

Thirdly, as shown in FIGS. 1, 2, 3 and 4, the vertical lifting type lifting mechanism 6 is used in combination, so that the aerial work vehicle 7 is first mounted on the ground side. By positioning the concave portion 16 of the workbench 9 with respect to the work-target columnar structure A, and allowing the worker to get on and off the workbench 9 and then ascend, it is possible to more smoothly perform work in high places. . Fourthly, as shown in FIGS. 3 (1) and 3 (2), the size of the chassis 8 is set to be short, or the recess 18 is formed in the chassis 8 so that the work table 9 Even when the columnar structure A to be worked is inserted into the concave portion 16 of the work table 9 and the overall size and width of the work table 9 are close to the chassis 8,
It is possible to reliably prevent the chassis 8 from coming into contact with or interfering with the columnar structure A to be worked.

Fifth, and further, the above-mentioned first, second, third and fourth points are easily realized. First, the above-mentioned work on high places on the first three surfaces is easily realized by a simple configuration in which the recess 16 is formed in the workbench 9. next,
The work at high places on the second four surfaces described above can be easily realized by a simple configuration in which the transfer plate 17 is provided in addition to the recess 16. Further, the vertical smoothing type lifting mechanism 6 that has been conventionally used is also used for performing the above-described third smooth work in high places.
It is easily realized by a simple configuration in which Further, in order to prevent the interference of the above-described fourth chassis 8 with the columnar structure A to be worked, the dimensions of the chassis 8 should be taken into consideration at the design stage in advance, or the recess 18 should be formed in the central portion where the design can be easily changed. Thus, it 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 concave portion on one side of the work table. First, it is possible to work at a high place from at least three surfaces and three directions. That is, by using this aerial work vehicle, it is possible to perform aerial work from three directions on at least the three surfaces around the columnar structure to be worked, simultaneously in parallel or sequentially.
As in the above-described conventional example of this type, the work efficiency is improved, such as the time loss for sequentially moving is reduced and the difficulty in cost for preparing a plurality of units is eliminated.

According to the second aspect, the following effects are exhibited by further providing the bridge plate. Secondly, it is possible to work in high places from 4 surfaces and 4 directions. That is, when this aerial work vehicle is used, it becomes possible to perform aerial work from four directions on four surfaces of the columnar structure to be worked simultaneously in parallel or sequentially. As in the conventional example of the type, the time loss of sequentially moving is greatly reduced, and the difficulty of the cost of preparing a plurality of units is surely eliminated, so that the work efficiency is significantly improved.

According to the third aspect of the invention, the following effect is exhibited by adopting the vertical elevating type. Third, work at heights can be performed more smoothly. In other words, when using this aerial work vehicle, on the ground side, the work can be positioned with respect to the columnar structure and the worker can get on and off, and by going up as it is, aerial work can be performed more smoothly. It becomes possible to implement it.

According to the fourth and fifth aspects, the following effects are exhibited by further shortening the size of the chassis and forming a recess in the chassis. Fourth, chassis interference is also prevented. That is, according to this aerial work vehicle, it is possible to reliably prevent the chassis from interfering with the columnar structure to be worked.

Moreover, the above-mentioned claims 1, 2, 3, 4,
In 5, the above-mentioned first, second, third and fourth effects are easily and easily realized. That is, in claim 1, only the concave portion is formed in the workbench, in claim 2, a bridge plate is provided, in claim 3, a vertical lifting type is used in combination, and in claims 4 and 5, a chassis is used. By simply considering the dimensions of the above and forming the recessed portion, each can be easily realized with excellent cost in view of the extremely simple structure. 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 drawings]

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

2 is a perspective view of a main part of an example in which a bridge plate is provided, and FIG. 2 is a schematic side view of an example of a vertically elevating type for explaining the embodiment of the invention. It is a figure.

3 is a schematic side view of an example in which the chassis is set shorter than the workbench, and FIG. 3 is a diagram showing a recess formed in the chassis. It is a schematic side view of an example.

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

FIG. 5 is a schematic perspective view of an example in which a workbench 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]

 DESCRIPTION OF REFERENCE NUMERALS 1 workbench (conventional example) 2 hook 3 aerial work vehicle (conventional example) 4 chassis (conventional example) 5 workbench (conventional example) 6 lifting mechanism 7 aerial work vehicle (present invention) 8) Undercarriage (of the present invention) 9 Workbench (of the present invention) 10 Crawler 11 Wheel 12 Boom 13 Mount 14 Bracket 15 Mast 16 Recess 17 Passing plate 18 Recess 19 Handrail A Columnar structure B Joint part

Claims (5)

[Claims] 1. An aerial work vehicle in which a workbench is mounted on a chassis so as to be able to move up and down by a lifting mechanism. The workbench has a rectangular shape, and a columnar structure to be worked is vertically moved on one side of the workbench. An aerial work vehicle, characterized in that a recess having a width that can be penetrated into is formed in a notch shape. 2. The aerial work vehicle according to claim 1, further comprising a bridge plate that can be bridged between the opening end sides of the recesses. 3. The aerial work vehicle according to claim 1, wherein the lifting mechanism is a vertical lifting type, and the working table is lifted and lowered while always maintaining a horizontal state. Aerial work vehicle. 4. The work vehicle according to claim 1, wherein the size of the chassis is set short so as not to interfere with the columnar structure to be worked. Work vehicle. 5. The aerial work vehicle according to claim 1, further comprising: a recess formed in the chassis such that the columnar structure to be operated is vertically inserted without interference. A featured aerial work vehicle.