JPH0716711Y2 - Aerial work vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an aerial work vehicle in which a bucket is sequentially attached to the tip of a boom via a support post, a boom side bracket, a parallel link mechanism, and a bucket support bracket. Is.

[Prior Art] Currently, in order to efficiently perform various works at high places, for example, replacement of electric wires, installation of signboards, painting of buildings, etc., FIG. 3 (a), (b) and FIG. A two-bucket type aerial work vehicle 21 as shown in FIG. 4 is known.

A two-bucket type aerial work vehicle 21 as shown in the same figure has a turntable 21b provided on a vehicle body 21a, on which a boom 22 which is capable of undulating, turning and extending and contracting is pivotally supported, and which is installed at the tip of the boom 22 in a standing manner. As shown in the figure, the support post 23 is equipped with two sets of buckets 25a and 25b via parallel link mechanisms 24a and 24b so that the buckets 25a and 25b can rotate, swing, and move up and down.

By the way, the conventional parallel link mechanisms 24a and 24b are configured such that the arm, which is supposed to be the main for supporting the buckets 25a and 25b, is used as the one long side link member 24c and 24d and the other long side link is used. The members are configured by adopting linear link members 24e and 24f as shown in FIG. The short side link members on the buckets 25a and 25b side were composed of bucket side brackets 27a and 27b, and the short side link members on the support post 23 side were also composed of boom side brackets 26a and 26b.

[Problems to be solved by the device]

Therefore, the conventional two-bucket type aerial work vehicle with the above configuration
For example, two buckets 25
The operations of a and 25b are performed by various positional relationships such as up and down, front and back, diagonal direction depending on the work content, but depending on the work content and the situation of the site, that is, for the convenience of a series of work,
When the parallel link mechanism 24a of the upper bucket 25a takes a downward attitude and the parallel link mechanism 24b of the lower bucket 25b takes an upward attitude at the same time, the upper bucket supporting the buckets 25a and 25b as well as between the buckets 25a and 25b main bodies. The lower long side link member 24e of the parallel link mechanism 24a of 25a and the upper long side link member 24d of the parallel link mechanism 24b of the lower bucket 25b may interfere with each other, causing an accident in which both members are damaged. There was a problem like that, and some sort of improvement was required.

In addition, the buckets 25a, 25b must be moved and operated so as to move between crowded electric wires, cables, arms, etc. located near the work on the pillar, and as a result, the buckets 25a, 25b must be moved.
5b and parallel link mechanism 24a, 24b, etc.
There was the inconvenience of being in contact with arms and the like, and even if I had one bucket with a bucket, I was having a hard time, but when I had two more buckets, I couldn't collect it. However, the actual situation was an obstacle, and some measure was required. Therefore, the parallel link mechanism, which is a member that supports the bucket, is improved.

[Means for Solving the Purpose and Problem of Invention]

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to mount a bucket on the tip of a boom sequentially through a support post, a boom side bracket, a parallel link mechanism, and a bucket support bracket. In order to provide an aerial work vehicle, the aerial work vehicle in which a bucket is swingably attached via a parallel link mechanism to a support post provided at the tip of the boom of the aerial work vehicle, The shape of one of the parallel link members forming the parallel link mechanism is configured to be offset to the other parallel link member side from a line connecting the support post of the parallel link member and both pivotal support portions of the bucket.

[Action]

Since the present invention adopts the above-mentioned configuration, when efficiently performing various works at high places, such as replacement of electric wires, installation of signboards and painting of buildings, etc. In the situation where it is necessary to interrupt the parallel link mechanism part between the wires or between the arms when approaching the place where many crosses and approaching the target work position as much as possible, It is possible to carry out the work without contact. In particular, in an aerial work vehicle that employs two buckets, the parallel link mechanism of the upper bucket is set in the downward position,
At the same time, even if the parallel link mechanism of the lower bucket is in the upward posture and the work posture is such that the two buckets cross each other, the parallel link mechanism that supports both buckets is constructed as slim as possible. The degree of freedom has been greatly expanded, and as a result, there is no more freedom to work, so the ideal bucket position can be secured compared to the conventional aerial work vehicle, and work efficiency is remarkable. Be improved.

〔Example〕

Hereinafter, based on FIGS. 1 (a), (b), (c) and FIG. 2, a two-bucket type aerial work vehicle will be described as an aerial work vehicle according to the present invention, and one embodiment thereof will be described in detail. explain.

In FIG. 1, the two-bucket type aerial work vehicle 1 is shown in FIG.
(B), (c) thru | or parallel link mechanism 4 as shown in FIG.
Adopted a and 4b.

Hereinafter, the detailed configuration of the parallel link mechanisms 4a and 4b will be described while explaining the overall outline of the aerial work vehicle.

As shown in the figure, the two-bucket type aerial work vehicle 1 has a turntable 1b provided on a vehicle body 1a, and a boom 2 which is capable of undulating, turning, and extending and retracting, and is pivotally supported at the tip of the boom 2. Attach the two boom side brackets 6a, 6b to the side of the support post 3 of the above and below,
The base ends of the two arms (upper long side link members 4c, 4d forming the parallel link mechanisms 4a, 4b) are independently rotatably pivoted, and these arms (upper long side link members 4c, 4d, 4b) each has a bracket on the bucket side
Buckets 5a, 5b are attached via 7a, 7b,
In addition, the boom side bracket 6 attached to the support post 3
Bucket side bracket 7 attached to a, 6b and bucket
a and 7b respectively to the arm (upper long side link member 4
c, 4d) both ends of the parallel link mechanism 4a, 4b for holding the buckets 5a, 5b in an equilibrium state regardless of the ups and downs of the buckets 5a, 4b, and two sets of buckets 5a, 4b via the parallel link mechanisms 4a, 4b, It is equipped with 5b that can be turned, swung, and moved up and down.

By the way, in the structure of the parallel link mechanisms 4a and 4b of the present invention, the arm which is supposed to be the main for supporting the buckets 5a and 5b is used as one long side link member 4c and 4d and the other long side is used. The link members 4e and 4f are configured by adopting a shape in which the other long-side link member is bent toward the long-side link members 4c and 4d, as shown in FIG.

The short-side link members on the buckets 5a and 5b side are composed of bucket-side brackets 7a and 7b, and the short-side link members on the support post 3 side are also composed of boom-side brackets 6a and 6b.

Hereinafter, the operation of the parallel link mechanism of the two-bucket type aerial work vehicle according to the present invention will be described based on the above configuration.

That is, in the parallel link mechanism in the two-bucket type aerial work vehicle according to the above-described embodiment, one of the long side link members 4 is the arm that is supposed to be the main for supporting the buckets 5a and 5b.
The other long side link members 4e, 4f are used as c, 4d, and the other long side link members are bent to the long side link members 4c, 4d side as shown in FIG. Since the short side link member of is composed of the bucket side brackets 7a and 7b, and the short side link member of the support post 3 side is also composed of the boom side brackets 6a and 6b, the dimension of the parallel link mechanism is slim. Therefore, when the parallel link mechanism 4a of the upper bucket 5a is in the downward position and at the same time the parallel link mechanism 4b of the lower bucket 5b is in the close position while performing the work at a high position, the bucket is moved further. Since the degree of freedom of operation is high, the bucket 5a,
The parallel link mechanism 4b of the lower bucket 5b and the lower long side link member 4e of the parallel link mechanism 4a of the upper bucket 5a supporting the lower bucket 5b.
The upper long side link member 4d does not interfere with each other, thus preventing accidents where both members are damaged, improving workability, and congesting electric wires located near the work on the pillar. Even if the buckets 5a and 5b have to be moved and operated so as to pass between the cables and arms, the parallel link mechanisms 4a and 4b do not come into contact with the wires, cables, arms, etc. Safety is also improved.

As another embodiment, as shown in FIG. 1 (c), the arms and parallel links are configured so that the shapes of the arms 4c and 4d are offset toward the parallel links 4e and 4f from the line connecting the pivots at both ends. In addition, the shapes of the parallel links 4e, 4f may be offset toward the arms 4c, 4d from the line connecting the pivotal support portions at both ends, and the present invention is not particularly limited to the above embodiment.

[Effect of device]

As described in detail above, the present invention is an aerial work vehicle in which a bucket is swingably attached to a support post provided at the tip of a boom of an aerial work vehicle via a parallel link mechanism.
Since the shape of one of the parallel link members constituting the parallel link mechanism is configured to be offset to the other parallel link member side from the line connecting the support posts of the parallel link member and both pivotal support portions of the bucket, In order to efficiently perform various types of work such as replacement of electric wires, installation of signs, painting of buildings, etc., for example, let the bucket face a place where many electric wires intersect near the pillar and keep the bucket as much as possible. It is possible to perform work without bringing the parallel link mechanism part into contact with the wires or arms, even in situations where it is necessary to approach the intended work position and interrupt the parallel link mechanism part between wires or arms. Become. In particular, even in the case of an aerial work vehicle that employs two buckets, even when the parallel link mechanism of the upper bucket is in the downward posture and the parallel link mechanism of the lower bucket is in the upward posture at the same time, the work postures in which they intersect each other are taken. The parallel link mechanism that supports both buckets has a slim shape as much as possible, which greatly expands the degree of freedom in operation, and therefore there is no more freedom to operate, so the work must be abandoned. Compared with the conventional aerial work vehicle, which has not existed, an ideal bucket position can be secured, and work efficiency is remarkably improved.

[Brief description of drawings]

FIG. 1 (a) is a perspective view of a main part of a parallel link mechanism of a two-bucket type aerial work vehicle described as an example of the aerial work vehicle according to the present invention, and FIG. 1 (b) is an enlarged side view of the same parallel work mechanism. FIG. 1C is an enlarged side view showing another embodiment of the parallel link mechanism of the above, FIG. 2 is a perspective view showing a two-bucket type aerial work vehicle which is an example of an aerial work vehicle according to the present invention, Figure 3 (a)
Is a perspective view of a main part of a parallel link mechanism of a two-bucket type aerial work vehicle in a conventional example, FIG.
FIG. 1 is a perspective view showing a two-bucket type aerial work vehicle in a conventional example. 1 ... 2 bucket type aerial work vehicle, 1a ... vehicle body, 1b ... turntable, 2 ... boom, 3 ... support post, 4a, 4b ... parallel link mechanism, 4c, 4d ... one long side link member, 4e, 4f ... The other long-side link member, 5a, 5b ... Bucket, 6a, 6b ... Boom side bracket, 7a, 7b ... Bucket side bracket.

Claims (1)

[Scope of utility model registration request] 1. An aerial work vehicle in which a bucket is swingably attached to a support post provided at the tip of a boom of an aerial work vehicle via a parallel link mechanism, and one of the parallel link mechanisms is configured. An aerial work vehicle characterized in that the shape of the parallel link member is configured to be offset from the line connecting the support post of the parallel link member and both pivotal support portions of the bucket to the other parallel link member side.