JP2001097686A - Boom working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a boom working vehicle making the most of useful mounting space to the maximum and securing elevating/lowering safety to a work bench. SOLUTION: This boom working vehicle 1 is constituted by providing a step 20 for elevating/lowering a work bench 8 disposed on a vehicle body 3 just under the work bench 8 so as to be covered with the work bench 8 from an upper side at a storing attitude of a boom and a lower boom operating device 10 to perform an oscillating operation of the work bench 8 on the vehicle body 3 side, exposing the step 20 in a plane view by oscillating the work bench 8 on the upper side of the step 20 by operating the lower boom operating device 10 and utilizing the step 20 so as to be elevatable/lowerable to/from a work bench 8. In a rear storing type boom working vehicle, it is desirable that the step 20 for elevating/lowering is disposed at a rear end part of the vehicle body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom work vehicle having a boom on a vehicle body and a work table attached to a tip of the boom.

[0002]

2. Description of the Related Art A boom having a freely movable body, a swinging movement, a telescopic movement, etc., on a movable vehicle body, and a worktable attached to the end of the boom so as to swing freely are provided. BACKGROUND ART A boom type aerial work vehicle in which an operator on a platform operates a boom to move to a desired altitude and perform work, is widely used, including overhead line construction and road construction. Such a boom type aerial work vehicle (hereinafter referred to as a “boom work vehicle”) is configured with a so-called cab-over type truck as a base vehicle, and the above-described boom device and the boom device are operated on a bed portion behind a driving cabin. A hydraulic unit for operating the boom, a tool box for loading work tools required for work at height, and the like are provided within a range that does not hinder the operation of the boom.

[0003] Further, the boom work vehicle is provided with a stair-shaped elevating route for getting on and off a work table stored on the vehicle body. Here, in the boom working vehicle as described above, a swivel for rotating the boom with respect to the vehicle body is disposed behind the loading platform, and a so-called front storage type in which the working platform is stored in an upper portion or a front upper portion of the driving cabin. Boom work vehicle,
There is a so-called rear storage type boom working vehicle in which a swivel is arranged in front of a loading platform and a working platform is stored behind the loading platform.For example, in a front storage type boom working vehicle, the boom working vehicle is mainly provided on the side of the vehicle body. Steps, the upper surface of the tool box arranged on the left side of the boom, and the lifting / lowering step provided at a position that will be the side of the worktable in plan view (top view) in the storage position, and in the storage position. An upper / lower path is formed so that the upper surface of the boom can be used as a substitute for the elevating step, and the vehicle can be boarded from the side of the vehicle body via these. Also, in the rear storage type boom work vehicle, similarly, a lifting step using the upper surface of the tool box or the like is provided at a position to be a side portion of the work table in the storage state of the work table, and a lifting path is formed. ing.

[0004]

As described above, in the case of a boom working vehicle that travels on a general road and works at a destination, it is necessary to expand a workable range while satisfying a structural standard of the vehicle, that is, a vehicle. From the viewpoint of ensuring the maximum boom length within the standard dimensions of, the workbench is inevitably swung to the front end (front retractable boom working vehicle) or rear end (rear retractable boom working vehicle) in the retracted position. It will be arranged in. Conventionally, the boom posture when getting on and off the work platform is based on the storage posture in which the work platform is stored on the vehicle body (referred to as the boom storage posture or the work platform storage posture). It was formed on this premise, and an elevating step was provided on the vehicle body. For this reason, the following problems have occurred.

First, the elevating step is provided on the premise that the operator gets on and off with the work table stored, that is, the elevating step needs to be exposed from the work table in plan view in the storage posture. From there, a lifting step is set up by cutting a part of the space of the equipment mounted on the carrier such as a tool box and a color cone (also called a pylon) storage section arranged outside the boom turning operation area I was That is, the lifting step is provided at the expense of a part of the loadable space of the loading platform. FIG. 4 shows a conventional rear-retractable boom working vehicle for explaining this situation. S1 to S4 in FIG.
The hatched area indicates the space removed for the lifting step.

In addition to the above premise, the work table is disposed at the end of the vehicle. For example, in the case of a rear-retractable boom work vehicle, the end surface of the work table is located at substantially the same position as the rear end of the vehicle in the retracted posture. Because of the swinging arrangement (see Fig. 4), the ascending / descending route cannot be provided behind the vehicle, and the driving cabin is located in front of the vehicle. Had to be provided. Here, in a general parking state during the operation of the boom work vehicle, the vehicle is parked with the vehicle as close to the left side of the road as possible so as not to obstruct the flow of other traffic. However, there are often guardrails and side walls of buildings on the side of the road, and there is a problem in that when an ascending / descending route to a worktable is provided on the left side of the vehicle, the vehicle cannot be parked to the full left side. . In addition, although a color cone is installed on the right side of the vehicle at the time of work, there is a traffic flow such as traffic of other vehicles, and there is a problem that it is difficult to provide an ascending / descending route in consideration of the safety of workers who go up and down.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and does not sacrifice the loading space of a boom working vehicle, and makes it possible to condition the parking of the vehicle and to improve the safety of workers. An object of the present invention is to provide a boom working vehicle that does not deteriorate.

[0008]

In order to achieve the above object, according to the present invention, in a boom work vehicle in which a work table is stored in an upper part of a vehicle body in a storage position of a boom, the work table is covered from above with the storage position of the boom. And a lower operation device for operating on the vehicle body to perform a swing operation of the work table, the lower operation device being operated on the vehicle body immediately below the work table. By swinging the worktable above the step, the step is exposed in plan view, and the boom work vehicle is configured to be able to move up and down on the worktable using this step.

[0009] According to the boom working vehicle having such a configuration, a worker who intends to perform a work at a high place swings the working table in the storage position when riding on the working table using the lower operation device. By this operation, the operator gets on the work table using the steps exposed in a plan view. For this reason, it is possible to increase the degree of freedom of the arrangement of the elevating steps, and to effectively use the useful installation space that has been sacrificed in the past and the space directly below the worktable that has not been used. It is possible to provide a boom working vehicle that effectively utilizes the upper part of the bed.

[0010] In a rear-retractable boom work vehicle in which the work table is stored in the rear part of the vehicle body, it is desirable that the above-described step for raising and lowering be disposed at the rear end of the vehicle body. By arranging in this manner, the path for raising and lowering to the worktable, which has been conventionally regarded as a problem, can be set at the rear of the vehicle. Therefore, it is not necessary to park the vehicle in consideration of the above, and it is possible to provide a boom working vehicle that ensures the safety of the worker when getting on and off the worktable.

Further, when the workbench is swung from the storage position of the boom to expose the steps in a top view, the workbench may swing so as to be substantially within the width of the vehicle body in plan view. preferable. According to such a configuration,
When parking the vehicle at the work site, it is not necessary to park the vehicle on the side of the vehicle in consideration of the projecting amount of the work table due to the swing of the work table swing. Can be parked near the left side of the road or the like. Therefore, it is possible to provide a boom working vehicle capable of performing work safely without hindering traffic.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a boom working vehicle according to the present invention will be described with reference to the drawings. FIGS. 1 (a) and 1 (b) are a plan view (a) and a left side view (b) of a rear-retractable boom working vehicle 1 in a boom retracted state, respectively, as a preferred embodiment of a boom working vehicle according to the present invention. As shown, this boom working vehicle 1 has a driving cabin 2
A turntable 4 that is configured to be able to turn horizontally with respect to the vehicle body by the operation of a turn motor is disposed on a bed of the body 3 that is configured to be able to travel and that the turntable 4 is movable. A boom 5 configured to be able to move up and down with respect to the vehicle body by the expansion and contraction operation of the up and down cylinder is pivotally mounted to the upper end.

At the tip of the boom 5, there is provided a vertical post 6 which is always kept vertical irrespective of the elevation angle of the boom 5 by the operation of a leveling cylinder (not shown). A worktable (also referred to as a bucket) configured to be swingable about the vertical post 6 around the center axis C of the vertical post 6 by the operation of the motor.
8 are provided.

The workbench 8 is provided with an upper boom operating device 11 for operating the boom 5, and an operator who rides on the workbench operates the upper boom operating device 11 to operate the boom 5. By raising and lowering, turning, expanding and contracting, and swinging the worktable 8, the worktable 8 can be moved to an arbitrary height to perform a desired work at a high place. . The lower boom operation is provided in the rear tool box (18) of the vehicle body 3 so that the operation of the boom 5 can be performed from the vehicle body 3 side when an operator riding on the work table 8 has an abnormality. An apparatus 10 is provided.

The front, rear, left and right sides of the vehicle body 3 are opposed to the overturning moment which acts on the vehicle body 3 when the boom 5 is swiveled, extended, or the like to cause the boom working vehicle 1 to overturn.
Are provided in order to stably support. Tool boxes 15, 16, 1 for loading work tools and the like used when performing high-place work on the vehicle body 3.
7, 18 are provided.

At the rear end on the left side of the vehicle body 3, an ascending / descending step 20 for the operator M to get on and off the worktable 8 is carried out in the storage position (the worktable 8 shown by a solid line in FIG. 1).
Is disposed so as to be covered from above. FIG. 2 is a perspective view of the elevating step 20 as viewed from the rear of the boom work vehicle 1, and is formed in a four-stage configuration from the lowermost S1 to the uppermost S4 on the side of the rear gate 19 at the rear end of the vehicle. ing.

In the lowermost step S1, a step configured to be rotatable so that a step surface appears by rotating the step is provided below a tail light at the rear of the vehicle.
When the operator M unfolds the board at the time of getting on and off the worktable 8, it functions as an elevating step. The second step S2 and subsequent steps are formed on the carrier of the vehicle body 3 as shown in the drawing, and function like a spiral staircase that turns clockwise.
In addition, grip bars 21 and 22 are arranged on both left and right sides of the third step S3 so that the worker M can easily go up and down when going up and down.

In the rear tool box 18 below the rear gate 19, the lower boom operating device 1 is configured so that the work table 8 can be swung while the work table 8 is stored.
The operator M uses the lower boom operating device 10 to swing the work table 8. When only the swing operation is performed at the storage position of the worktable 8, the operation is permitted, and the swing operation is performed at a worktable position suitable for getting on and off using the step 20 (referred to as “alighting position”). Is controlled to stop automatically. In addition, even when the workbench 8 is stored after finishing work at a high place, when the upper boom operating device 11 automatically stores the boom, it is controlled to automatically stop at the getting on / off position.

FIG. 1 shows the position of the work table when the work table 8 alone is swung by the lower boom operating device 10 from the retracted state of the work table and automatically stopped at the getting on / off position, and the movement locus thereof. The workbench, which is shown by a two-dot chain line and in which the elevating step 20 is exposed in a plan view and stopped by swinging about 75 degrees in this embodiment.
(8) is configured so as not to be an obstacle above the overhead of the worker M who moves up and down the step 20. Further, when the work table 8 is swung to the boarding / alighting position, the work table 8 is configured not to protrude greatly to the left side of the vehicle body 3 in this operation process.

In the boom working vehicle 1 configured as described above, the worker M who has arrived at the construction site moves the vehicle all the way to the left side of the road so as not to hinder other traffic as shown in FIG. You can park. Next, the color cones 30, 30,... Are installed before, after, and on the right side of the vehicle, and after ensuring traffic safety in the construction area, the jack (14) is extended and grounded to stabilize the vehicle body 3. Then, the work table 8 is swung by operating the lower boom operating device 10 and automatically stopped at the boarding / alighting position, and then the step 8 is used to safely board the work table 8 from the rear left side of the vehicle. it can. After the work at a high place is completed, the workbench 8 is automatically stopped at the getting on / off position by activating the automatic storage switch of the upper boom operating device 11. Therefore, after the worker safely descends from the work table 8 using the step 20, the work table 8 can be stored using the lower boom operating device 10.

With such a configuration, the area of the step S2 at the rear of the loading platform is occupied as an elevation step surface, but the loading space for the tool boxes 15, 16 which has been sacrificed in the past is enlarged (FIG. The position of the conventional tool box can be indicated by a dashed line in FIG. 1), so that the installation space can be effectively utilized.

[0022]

As described above, according to the present invention, there is provided a step for raising and lowering a worktable disposed on a vehicle body immediately below a worktable so as to be covered from above by a worktable in a storage position of a boom; A lower operating device for operating the worktable to swing the worktable, and exposing the step in plan view by operating the lower operating device to swing the worktable above the step, Using this step, a boom work vehicle is configured to be able to move up and down on the work table. For this reason, it is possible to increase the degree of freedom of the arrangement of the elevating steps, and to effectively use the useful installation space that has been sacrificed in the past and the space directly below the worktable that has not been used. It is possible to provide a boom working vehicle that effectively utilizes the upper part of the bed.

In the case of a rear-retractable boom working vehicle in which the worktable is stored in the rear part of the vehicle body, it is desirable that the above-described step for raising and lowering be disposed at the rear end of the vehicle body. By arranging in this manner, the path for raising and lowering to the worktable, which has been conventionally regarded as a problem, can be set at the rear of the vehicle. Therefore, it is not necessary to park the vehicle in consideration of the above, and it is possible to provide a boom working vehicle that ensures the safety of the worker when getting on and off the worktable.

Further, when the workbench is swung from the storage position of the boom to expose the steps from the top view, the workbench may swing so as to be substantially within the range of the vehicle width in plan view. preferable. According to such a configuration,
When parking the vehicle at the work site, it is not necessary to park the vehicle on the side of the vehicle in consideration of the projecting amount of the work table due to the swing of the work table swing. Can be parked near the left side of the road or the like. Therefore, it is possible to provide a boom working vehicle capable of performing work safely without hindering traffic.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a boom working vehicle according to the present invention.
(a) and a left side view (b).

FIG. 2 is a perspective view showing an elevating step of the boom working vehicle.

FIG. 3 is an explanatory diagram illustrating a work situation when performing a high-place work using the boom working vehicle of the present invention.

FIG. 4 is a plan view (a) showing the configuration of a conventional boom working vehicle,
And (b) a left side view.

[Explanation of symbols]

 Reference Signs List 1 boom work vehicle (boom type aerial work vehicle) 5 boom 8 work platform 10 lower boom operation device (lower operation device) 20 step for raising / lowering work platform

Claims (1)

[Claims] 1. A vehicle comprising: a boom configured to be able to move up and down at least on a vehicle body; and a worktable disposed at a tip of the boom and attached to the boom so as to swing freely, In a boom work vehicle storing the workbench in an upper part of the vehicle body in the storage position of the boom, the workbench is disposed on a vehicle body directly below the worktable so as to be covered from above by the worktable in the storage position of the boom. A step for raising and lowering the worktable; and a lower operating device for operating on the vehicle body side to perform a swing operation of the worktable, and operating the lower operating device to move the worktable above the step. A boom working vehicle wherein the step is exposed in a plan view by swinging the head, and the step can be moved up and down using the step.