JP3722571B2 - Boom work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a boom type work vehicle.
[0002]
[Prior art]
Some boom-type work vehicles such as an aerial work vehicle are equipped with a boom via a swivel at the rear of the loading platform behind the driver's seat of the vehicle. There are cases where it is desired to install a winch for erection of electric wires, a winch for wrecker work, etc. on the loading platform.
[0003]
In the case of an aerial work platform, in particular, in the cargo bed part, the front part and both side parts of the swivel are often equipped with an article storage part such as a container or a tool box. As a whole, there may be a U-shape that opens rearward in plan view.
[0004]
Further, in the case of a crane vehicle, the swivel bearing or swivel is larger than the vehicle width, and it may be difficult to dispose the ropes in the front-rear direction after passing through these sides.
[0005]
That is, when installing a winch or the like on the loading platform of a boom type work vehicle, an installation space for the winch drum device and a passage space for a cable body such as a wire cable extending from the winch drum are necessary. It is necessary to secure an installation space on the loading platform so as to arrange them regularly.
[0006]
Therefore, conventionally, in such a case, a winch or the like is installed there at the expense of a space such as an article accommodating portion installed around the swivel, or a separate winch is used. It is said.
[0007]
[Problems to be solved by the invention]
In a conventional boom type work vehicle in which a winch or the like is installed on the loading platform, even if a winch or the like is installed on the loading platform, on the other hand, the space for the article storage unit must be extremely small. It was.
[0008]
This invention is made | formed based on such a situation, and makes it a subject to reduce the reduction | decrease of spaces, such as an article | item accommodating part, although installing the winch etc. in the loading platform part.
[0009]
[Means for Solving the Problems]
In order to solve this problem, the invention according to claim 1 is a boom-type work vehicle comprising a swivel that can turn freely at a rear part of a loading platform of a vehicle, and a boom that can be raised and lowered on the swivel. the swivel slide, is erected fixed on the bed section, as well as placed on a smaller than the swivel base post in the cross section of at least the vehicle width direction in a plan view, on the loading platform portion, a front side of the post A winch drum is disposed at a position deviated in the vehicle width direction with respect to the center of the post, and a guide device is disposed at a position behind the vehicle and deviated to the same side as the winch drum in the vehicle width direction with respect to the center of the post. arrangement, and a rope member extending from the winch drum, along the loading platform portion is passed through the side near and said revolving base below said post, pulled out so the rear of the vehicle through the guide device It is a boom-type work vehicle, characterized in that it was.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on an embodiment of an aerial work vehicle as a boom type work vehicle.
[0011]
First, the entire aerial work vehicle will be described with reference to FIGS. 1 to 3, which show a state in which the boom is stored.
[0012]
In FIG. 2, 1 is an aerial work vehicle, 2 is a self-propelled vehicle, a driver's seat 3 is provided at the front thereof, and a cargo bed 4 is provided at the rear thereof. Outrigger devices 5 are provided on both front and rear sides.
[0013]
A post 6 erected with the lower end fixed to the body frame is installed at the center of the rear portion of the loading platform 4 of the vehicle 2. The upper end of the post 6 is driven by a hydraulic motor around a vertical axis. A swivel base 7 that is driven to swivel is installed, and the swivel base 7 is provided with a column portion 8 that is erected integrally (FIG. 1).
[0014]
This is the upper end of the pillar portion 8 telescopic boom 11 is pivotally supported via a pivot 12, the telescopic boom 11 is in the liftable by derricking cylinder 13 consisting of a hydraulic cylinder.
[0015]
The telescopic boom 11 in this embodiment can be telescopic with a telescopic cylinder made of a hydraulic cylinder in which a plurality of boom parts are telescopically fitted. However, in the present application, the telescopic boom 11 may be a boom having no telescopic function. .
[0016]
And the bucket 14 for a worker to get on and work at a high place is attached to the front-end | tip part of the said expansion-contraction boom 11 so that a swing is possible with a mounting bracket.
[0017]
In the aerial work vehicle 1 of this embodiment, the telescopic boom 11 and the bucket 14 are stored forward in the center of the vehicle 2 as shown in FIG. It is supported on a boom rest 15 installed on the top (see FIGS. 2 and 3).
[0018]
An article storage unit 16 composed of a plurality of storage boxes, a tool box and the like is flat on the front and both sides of the part where the post 6, the swivel base 7 and the support column 8 are installed in the loading platform 4 of the vehicle 2. In view, the three parts of the part are surrounded by a U-shape.
[0019]
In this specification, the front-rear direction means the front-rear direction of the vehicle 2, and the side means the vehicle-side direction.
[0020]
In this way, the swivel base 7 and the support column 8 under the condition of being surrounded by the article storage unit 16 in a U-shape are provided with a required gap space between the surrounding article storage unit 16. These can be turned around the vertical axis without any trouble.
[0021]
A winch drum device 21 is biased to the left side in the vehicle width direction at a position in front of the post 6 in the vicinity of the front portion of the article storage portion 16 formed in the U shape. It is installed on the upper surface of the part 4.
[0022]
The winch drum device 21 includes a drum portion 22 and a drive motor portion 23 with a built-in speed reduction device. The drive motor portion 23 is installed by partially using the space of the article storage portion 16 on the left side in the vehicle width direction. The inner end side of the output shaft 23a of the drive motor portion 23 is connected to the drum portion 22, and the outer end side extends to the left side of the vehicle.
[0023]
This is because a winding drum is mounted on the outer end side of the output shaft 23a in the winding process of the electric wire, and the part where the drive motor unit 23 is installed is driven from rainwater during raining or the like. In order to protect the motor part, it is covered with a removable cover 24.
[0024]
As is apparent from FIGS. 1 and 3, the drum portion 22 is disposed on the cargo bed portion 4 so as to substantially face a gap space located between the article storage portion 16 and the post 6.
[0025]
The wire cable 25 is drawn out or wound up from the lower side of the rotation center axis of the drum portion 22, and the wire cable 25 drawn out from the drum portion 22 approaches the top surface of the loading platform 4. It extends toward the rear (see FIG. 4).
[0026]
A guide device 26 that guides a wire cable 25 as a rope extending from the drum portion 22 is installed at the rear end portion of the loading platform portion 4 so as to correspond to the drum portion 22. The wire cable 25 extending from the drum portion 22 is restrained by the guide device 26 and can be pulled out rearward of the vehicle 2.
[0027]
And the cable line of the wire cable 25 connected from the drum portion 22 to the guide device 26 is stretched as shown by the phantom line in FIG. 3, but the cable line closest to the vehicle body center side is While passing through the outer shape of the swivel base 7 in plan view, a slight gap is secured between the post 6 and the outer peripheral surface.
[0028]
Even in such a state, as shown in FIG. 1, the swivel base 7 and the wire cable 25 are different in height position on the loading platform part 4, so that even if the swivel base 7 turns, the wire cable 25 does not move. There is no contact with the swivel base 7. Further, since the post 6 is erected with the lower end fixed to the body frame of the loading platform 4, the post 6 is a fixing member, so that the contact between the wire cable 25 and the post 6 is slight. A gap size is sufficient.
[0029]
In addition, in this embodiment, the post 6 uses a member having a smaller cross section than the swivel base 7 in a plan view, that is, a small-diameter cylindrical member. The space between them is enlarged toward the vehicle body center line side, and this enlarged space is used for the installation of the drum portion 22 and the arrangement of the wire cable 25, so that the winch drum device 21 is placed at such a position that was a conventional dead space. Etc. can be arranged.
[0030]
As described above, since the installation of the drum portion 22 and the arrangement of the wire cable 25 are made possible by using the conventional dead space, the equipment for installing these on the loading platform 4 has been provided. It is not necessary to greatly sacrifice the space of the article storage unit 16 which has been difficult, and the space sacrifice of the article storage unit 16 is reduced.
[0031]
In addition, although embodiment described above is related to an aerial work vehicle, it cannot be overemphasized that this application can be implemented not only in this but a crane vehicle etc. in general similarly.
[0032]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the post on which the swivel is installed is a fixed member that is installed and fixed to the loading platform, a large gap for performing a swivel operation as in the prior art. There is no need to secure a space around it, and a winch drum, a wire cable, or the like can be arranged close to the post. Therefore, a space that has been conventionally regarded as a dead space can be utilized for the installation of a winch drum device or the like, and a reduction in the space of an article storage unit or the like that has conventionally been sacrificed for the installation can be reduced.
[Brief description of the drawings]
FIG. 1 is a rear view of an aerial work vehicle.
FIG. 2 is a side view of an aerial work vehicle.
FIG. 3 is a plan view of an aerial work vehicle.
FIG. 4 is a side view showing a relationship between a post and a winch at a rear portion of the loading platform.
[Explanation of symbols]
1 High-altitude work vehicle (boom work vehicle)
2 Vehicle 4 Loading platform 6 Post 7 Turntable 11 Telescopic boom (boom)
14 Bucket 16 Goods storage unit 21 Winch drum device (winch drum)
25 Wire cable (strand body)
26 Guide device

Claims (1)

In a boom-type work vehicle equipped with a swivel that can turn freely at the rear part of the loading platform of the vehicle, and a boom that can be raised and lowered on the swivel,
The swivel base is erected and fixed on the cargo bed part, and the cross section in plan view is installed on a post smaller than the swivel base at least in the vehicle width direction ,
On the loading platform, a winch drum is disposed at a position on the front side of the post and deviated in the vehicle width direction with respect to the center of the post, and at the rear of the vehicle and in the vehicle width direction with respect to the center of the post. The guide device is arranged at a position biased to the same side as the winch drum,
The cable body extending from the winch drum passes along the loading platform near the side of the post and below the swivel , and can be pulled out to the rear of the vehicle via the guide device. Boom-type work vehicle.

Images