JPH0643110Y2 - Aerial work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an aerial work vehicle having a manipulator arm.

(Prior Art) A conventional aerial work vehicle having a manipulator arm, as shown in FIGS. 3 and 4, always has a fixed posture at the tip of a boom 1 mounted on the vehicle so as to be capable of swinging and hoisting. To the posture maintaining member 2 attached to maintain,
A horizontal swivel bracket 3 is attached so that it can be swiveled horizontally around a vertical axis, and a bucket 4 for an operator to ride on is attached to the horizontal swivel bracket 3 and an articulated manipulator arm 5 that can be remotely operated from within the bucket 4.
It is configured by attaching. In this running posture of the aerial work vehicle, the boom 1 is laid down on the driver's cab A of the vehicle and stored, and the manipulator arms 5, 5 are mounted on the driver's cab roof of the vehicle. It is designed to be placed and stored on B and B. As shown in FIG. 5, the manipulator arm supporting device B is composed of a supporting base 7 having a U-shaped cross section which is opened upward on a base 6 mounted on a driver's cab A of a vehicle. The manipulator arm 5 is housed in a support base 7 that opens upward, and the manipulator arm 5 is supported during traveling to prevent vibration.

(Problems of the prior art) In the conventional work vehicle having the manipulator arm configured as above, when the manipulator arm 5 is placed and stored on the manipulator arm support device B, first, the manipulator arm 5 is stored. Is placed above and the boom 1 is laid down on the cab A of the vehicle, and then the manipulator arm 5 is moved to the manipulator arm support device B.
Must be placed and stored on top. That is, if the manipulator arm 5 is first stored in the retracted position as shown in FIG. 3 and then the boom 1 is laid down on the cab A of the vehicle, the manipulator arm 5 is unnecessarily lowered from the position shown in FIG. If it is located at, the manipulator arm 5 and the manipulator arm support device B receive an excessive force and come into contact with each other, and the manipulator arm 5 or the manipulator arm support device B is damaged.

In addition, since the manipulator arm 5 is operated and operated by the operator on the bucket 4 to store and store the manipulator arm 5 on the manipulator arm support device B, the worker on the bucket must confirm the position of the manipulator arm 5 from above. Therefore, it is very difficult to operate the manipulator arm 5 and the manipulator arm supporting device B while checking the distance between them, which requires skill.

The present invention aims to provide a new aerial work vehicle that solves the above problems.

(Means for Solving Problems) An aerial work vehicle according to the present invention is equipped with a posture maintaining member attached to the tip of a boom mounted on the vehicle so as to be capable of swinging and undulating, so as to always maintain a constant posture. A horizontal swing bracket is mounted so that it can be driven to swing horizontally about the vertical axis, and a bucket for the operator to ride on and a multi-joint type manipulator arm that can be remotely operated from this bucket are attached to this horizontal swing bracket. A work vehicle, in which the boom is laid down on the cab of the vehicle and stored, and the manipulator arm is mounted and stored on the manipulator arm support device mounted on the cab roof of the vehicle. In an aerial work vehicle, the support device is associated with a base part mounted on the roof and vertically movable to the base part via a buffer spring. Allowed is characterized in that it has structure and an upper structure unit having a manipulator arm bearing at its upper end.

(Operation) In the aerial work vehicle of the present invention configured as described above, since the support portion of the manipulator arm can be moved up and down via the buffer spring, the manipulator arm is first moved to the predetermined position which is the storage position. The boom may be laid down at the same time. At this time, even if the manipulator arm is located below the predetermined storage position, the manipulator arm support portion is moved downward by the bending of the buffer spring,
The manipulator arm and the manipulator arm support are not brought into contact with each other with an excessive force. Therefore, the manipulator arm can be placed on the bearing device without damaging the manipulator arm or the manipulator arm bearing device.

Further, it is not necessary to accurately confirm the distance between the manipulator arm and the support device by the operation from above the bucket, and it is possible to store the manipulator arm without requiring skill.

(Embodiment) An embodiment of an aerial work vehicle of the present invention will be described below with reference to FIGS.
Description will be given with reference to FIGS. 3, 3 and 4. In addition,
Regarding the retracted posture of the manipulator arm, only the manipulator arm support device B is different from that shown in FIG. 3 and FIG. 4 in the prior art, and the others are the same. Description is omitted using the same reference numerals. In FIG. 1, D is a manipulator arm support device according to the present invention, which is mounted on the cab roof of the vehicle in place of the manipulator arm support device B described in the prior art. Reference numeral 8 denotes a base portion, which is composed of an inner cylinder 9 whose lower end is adapted to be mounted on the cab roof of a vehicle, and a lid 10 fixed at an appropriate position in the inner cylinder 9. . 11 is an upper structure part, and is as follows. An outer cylinder 12 has an inner cylinder 9 inserted into the lower end thereof and a lid 13 fixed to the upper end thereof.
Reference numeral 14 denotes a first support base, which is a bracket having a U-shaped cross section and having brackets 15 and 16 attached to the tip of the outer cylinder 12 in a state where the upper side is opened.
It is attached through. Reference numeral 20 is a support portion that supports the manipulator arm 5, and includes a second support stand 17 and a rubber plate.
It is composed of 19 and. The second support stand 17 is opened upward by a U-shaped plate like the first support stand 14, and the first support stand 14 is fitted in the first support stand 14 on the outside. It is swingably supported by a pin 18. Rubber plate
19 is attached to the inside of the second support 17. Reference numeral 21 denotes a buffer spring, which is inserted into the inner cylinder 9 and the outer cylinder 12 and is arranged such that both ends are sandwiched by the lid 10 and the lid 13. Reference numeral 22 is a bolt that penetrates the lid 10 and passes through the center of the buffer spring 21.
Through one end and fasten one end to the first support 14 and attach the nut to the other end.
Tighten 23. The bolt 22 adjusts the distance between the lid 10 and the lid 13 by adjusting the tightening of the nut 23 to regulate the urging force of the buffer hammer spring so that the outer cylinder 12 fitted on the inner cylinder 9 does not come out of the inner cylinder. It is what prevents it. Next, FIG. 2 will be described. 2 shows a side view of FIG. 1, and 24 is a pin having one end fixed to the inner cylinder 9 and the other end protruding outward. Reference numeral 25 denotes an elongated hole provided in the outer cylinder 12 in the up-down direction, and the pin 23 is positioned in the elongated hole 25. The pin 24, the long hole 25, and the inner cylinder 9 are arranged to allow the outer cylinder 12 to move in the vertical direction and prevent the outer cylinder 12 from rotating with respect to the inner cylinder 9. This is to prevent the second support table 17 from rotating and being unable to be stored when it is stored in the second support table 17.

An aerial work vehicle equipped with the manipulator arm support device D according to the present invention having the above structure operates as follows. Now, a case will be described in which the boom 1 is raised from the upright position and the manipulator arm 5 is placed and stored in the manipulator arm support device D by lying down.
When the manipulator arm 5 is located below a predetermined storage position and the boom 1 is laid down on the driver's cab A of the vehicle, the manipulator arm 5 comes into contact with the support portion 20 until the boom 1 is completely laid down. Then, along the side surface of the abutting manipulator arm 5, a rubber plate 19 on the second support stand 17 is provided.
The second support 17 is swung about the pin 18 so that the surfaces contact each other. When the boom 1 is further laid down, the buffer spring
The bearing 20 is moved to the manipulator arm 5 against the urging force of 21.
Is pressed, the inner cylinder 9 is inserted into the outer cylinder 12, and the support portion 20 is positioned below. In this way the manipulator arm 5
Even if is located below the predetermined storage position, the manipulator arm support device D of the present invention allows the manipulator arm 5 to be placed and stored without exerting a force greater than the urging force of the buffer spring 21 on the manipulator arm 5.

Further, even when the manipulator arm 5 is placed and stored on the manipulator arm support device D by the operation of the operator who has boarded the bucket 4, the bearing 20 can move up and down, so skill is required. The manipulator arm 5 can be placed and stored without the manipulator arm 5. If the manipulator arm 5 is stored and stored so that the urging force from the buffer spring 21 is always applied during storage, it is possible to prevent the manipulator arm 5 from jumping out of the support portion 20 due to vibration during traveling.

It should be noted that in the above embodiment, the second support table is provided in the first support table 14.
The outside of 17 is fitted, the second support 17 is made swingable by the pin 18, and the side surface of the manipulator arm 5 and the contact surface of the second support 17 are in surface contact. Stand
Instead of using 14, the second support 17 may be directly attached to the tip of the outer cylinder 12.

[Brief description of drawings]

FIG. 1 is an explanatory view of a manipulator arm support device for an aerial work vehicle according to the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3, and FIG. FIG. 5 is an explanatory view of a local work vehicle, and FIG. 5 is an explanatory view of a conventional manipulator arm support device. 1: Boom, 2: Posture maintaining member, 3: Horizontal swing bracket, 4:
Bucket, 5: Manipulator arm, 8: Base part, 20: Bearing part, 21: Buffer spring, 11: Upper structure part, D: Manipulator arm bearing device

Claims (1)

[Scope of utility model registration request] 1. A horizontal swing bracket for allowing horizontal swing drive around a vertical axis on an attitude maintaining member attached to the tip of a boom that is mounted on a vehicle so as to be swingable and hoistable so as to always maintain a constant posture. A work platform for aerial work, in which a bucket for mounting a worker on the horizontal swing bracket and an articulated manipulator that can be remotely operated from the bucket are mounted on the horizontal swing bracket. An aerial work vehicle adapted to be stored on a roof of a vehicle cab of a vehicle while lying down on top of the manipulator arm. The attached base is associated with the base so that it can move up and down via a buffer spring, and a manipulator arm support is provided at the upper end of the base. An aerial work vehicle characterized by being composed of the above-mentioned upper structure.