JPH0628553Y2 - Aerial work vehicle - Google Patents

Description

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

(Prior Art) Conventionally, in this type of aerial work vehicle, connecting lines such as a pressure oil hose, an electric wire cable, and a control cable arranged at the bucket and the tip of the boom through a boom that expands and contracts from the vehicle body side are It is wired to the boom via the cable bear provided on the boom, and the cable bear operates in response to the expansion and contraction of the boom, allowing the pressure oil hose, electric cable, control cable, etc. to expand and contract the boom. I was guided to do so.

(Problems to be solved by the invention) However, in the case where the cable bear is used as in the above-mentioned conventional technique, the weight of the revolving portion is increased by the weight of the cable bear installed on the boom, which causes a problem when working at a high place. There was a problem that the stability of was deteriorated. Further, since the cable bear is expensive, it has been an obstacle to cost reduction.

(Means for Solving the Problem) In an aerial work vehicle of the present invention, a turning post is rotatably mounted on a vehicle body, and a boom having a bucket at a tip end thereof is provided on the turning post so that the boom can extend and retract. In an aerial work vehicle, a guide member extending along the boom, one end of which is connected to the end of the expanding and contracting portion of the boom, and a storage member that is located below the guide member and is disposed in the main body of the boom. And a connecting wire disposed in the bucket from the turning post through the boom through the boom is wired in a U shape between the guide material and the storage material. Further, the main body of the boom has a cover body above the guide material. Is extended along the guide member, and the cover body guides the connecting line when the boom is extended.

(Operation) A connecting wire arranged in the bucket from the turning post through the boom to the guide material and the storage material is wired in a U shape, and when the boom is expanded and contracted, the guide material and the storage material
The connecting wire is guided so as to allow expansion and contraction of the boom, and the cover body protects the bending portion of the connecting wire from protruding outward.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall construction of an aerial work vehicle according to the present invention.

A turning post 2 is erected upright on the vehicle body 1,
A base end portion of a boom 3 is provided on an upper end portion of the swivel post 2 so as to be able to be raised and lowered by a hoisting cylinder 5. Boom 3
Is configured to be extendable and retractable by an extendable cylinder (not shown). A bucket 6 is provided at the tip of the boom 3. The bucket 6 is provided with an operating portion (not shown), and by operating this operating portion, it is possible to control the turning of the turning post 2 and the ups and downs of the boom 3.

Further, a horizontal cylinder (not shown) is provided between the boom 3 and the bucket 6 so that the bucket 6 is always held horizontally with respect to the hoisting operation of the boom 3. The horizontal cylinder is configured to expand and contract in synchronization with a direction opposite to the expansion and contraction movement of the expansion and contraction cylinder 7 disposed between the base end of the boom 3 and the upper end of the swing post 2.

The swivel post 2 is provided with a sprocket (not shown) at the base end thereof, and the chain 2 is attached to this sprocket.
2 is wound in a U shape from the rear. This chain 2
2 is connected to a rod end of one cylinder 23 of two cylinders 23 (only a front cylinder is shown in this example) 23 in which one end 22a is provided in parallel on the vehicle body, and
The other end is connected to the rod end of the other cylinder (not shown). Therefore, by extending and contracting these two cylinders 23 in opposite directions, the chain 22 is drawn to one cylinder 23 side or the other cylinder side,
The sprocket rotates in accordance with the drawn amount, and the turning post 2 turns accordingly. That is, the turning amount of the turning post 2 is determined by the expansion / contraction stroke of these cylinders 23.

Reference numeral 4 in the drawing is an outrigger provided on each of the front and rear sides of the vehicle body 1.

Next, FIG. 2 is a plan view showing a guide device and a cover body provided on the boom, FIG. 3 is a side view of the same, and FIG. 4 is a sectional view taken along the line IV-IV in FIG.

The boom 3 is configured in a two-stage telescopic type including a boom body portion 31 and a boom telescopic portion 32. A cable (connection line) 8 including a pressure oil hose 8a, an electric wire cable 8b, and a control cable 8c arranged in a bucket 6 from the vehicle body 1 side through the boom 3 is guided to the boom 3 according to expansion and contraction of the boom 3. The guide device 10 is provided so that the cable 8 is allowed to expand and contract by the guide device 10. The cable 8 supplies pressure oil to the tip of the boom 3 or electrically connects the vehicle body 1 side to the bucket 6.

The guide device 10 includes a guide member 11 disposed above the side surface of the boom 3 in the longitudinal direction of the boom 3, and a lower portion of the side surface of the boom body portion 31 from a substantially central portion of the boom body portion 31 to a base end thereof. The storage material 17 is provided over the entire area.

One end 12 of the guide member 11 is fixed to the tip end of the boom expanding / contracting portion 32 on the left side in FIGS. 2 and 3,
The other end 13 extends along the boom body 31 at the base end of the boom body 31 when the boom 3 shown in FIGS. 2 and 3 is retracted. At the other end 13 of the guide member 11, as shown in FIG. 4, a roller 14 that engages with a rail member 33 that is arranged on the upper surface of the boom body 31 in the longitudinal direction is engaged with the L-shaped bracket 15. The roller 14 is guided by the rail member 33 and rolls when the boom expanding / contracting unit 32 expands / contracts, so that the guide member 11 can smoothly move in the longitudinal direction together with the boom expanding / contracting unit 32. It is done like this.

A holding member 11a for arranging the cable 8 along the guide member 11 is provided at an appropriate position of the guide member 11 (in this example, near both ends 12, 13 of the guide member 11). Further, the clamp member 1 for gripping the cable 8 is provided at an appropriate place of the guide member 11 (in this example, both ends 12 and 13 of the guide member 11 which are at both ends than the holding member 11a).
6 are provided respectively. The clamp member 16 is configured to clamp the cable 8 from above and below via a rubber plate (not shown) or the like, and it is possible to grasp the cables 8 having different diameters without difficulty. The numbers and positions of the holding members 11a and the clamp members 16 are not limited to those in this example, and a suitable number of them may be provided at appropriate places of the guide member 11.

As shown in FIG. 4, the storage member 17 has a U-shaped cross section, and is arranged in the boom main body 31 with the opening thereof facing upward.

Therefore, the cable 8 disposed from the vehicle body 1 side through the turning post 2 along the side surface of the boom main body 31 from the base end to the substantially central portion is stored when the boom 3 is retracted as shown in FIG. After being stored in the opening of the storage material 17 from one end portion 17a of the storage material 17, it is bent upward from the other end portion 17b of the storage material 17 and gripped by the clamp member 16 provided at the base end of the guide material 11. The guide member 11 is guided to the guide member 11 via the holding members 11a and 11a, and is disposed at the tip of the boom telescopic unit 32.

Further, above the guide material 11, the guide material 11
A cover body 20 is arranged along the above. Cover body 20
Has substantially the same length as the guide member 11 and is attached to the boom body 31 via an L-shaped angle.

In this way, since the cable 8 is arranged on the boom 3, when the boom 3 extends, the guide member 11 moves in the same direction (leftward in FIG. 3) as the boom expanding / contracting portion 32 extends.
Move to. Therefore, the cable 8 held by the clamp member 16 at the other end 13 of the guide member 11 is stored in the storage member 17
Is drawn while drawing a curve from this, thereby allowing the boom 3 to extend. When the boom is extended,
The curved portion 8a of the cable 8 is curved by being pressed by the cover body 20 from above, and the curved portion 8a of the cable 8 does not project upward from the boom 3 by the cover body 20.

Further, when the boom 3 is retracted, the guide member 11 moves in the same direction (rightward in FIG. 3) as the boom expandable unit 32 retracts, and the cable 8 fed out from the storage member 17 is accordingly covered. It is stored in the storage material 17 again while being guided to, and returns to the state shown in FIG.

In this example, the two-stage telescopic boom 3 has been described as an example, but the present invention is not limited to this and can be applied to, for example, a three-stage or four-stage telescopic boom.

(Effect of the Invention) As described above, according to the present invention, when the boom is extended / contracted with a simple structure, the connecting wire arranged on the boom is surely guided so as to allow the boom extension / contraction. It is possible to provide an inexpensive and highly reliable one without using a conventional cable bear. Further, since the weight is lighter than that of the cable bear, the safety during boom operation can be improved and the aerial work vehicle can be reduced in size and weight. Further, since the curved portion of the connecting wire is protected by the cover body so as not to project outward, damage due to interference with other members can be prevented and the boom can be operated smoothly.

[Brief description of drawings]

FIG. 1 is a side view showing the overall structure of an aerial work vehicle according to the present invention, FIG. 2 is a plan view showing a guide device and a cover body provided on a boom, FIG. 3 is the same side view, and FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. DESCRIPTION OF SYMBOLS 1 ... Car body, 2 ... Turning post 3 ... Boom, 6 ... Bucket 8 ... Cable (connection line) 11 ... Guide body, 12 ... Storage material 20 ... Cover body

Claims (1)

[Scope of utility model registration request] 1. An aerial work vehicle in which a turning post is rotatably mounted on a vehicle body, and a boom having a bucket at its tip is provided on the turning post so that the boom can extend and contract and can be raised and lowered. The guide member is provided with one end connected to the end of the boom expansion and contraction portion, and the storage material disposed below the guide member and disposed in the main body portion of the boom. A connecting wire is provided in a U-shape extending between the guide member and the storage member, and a cover body is extended above the guide member along the guide member in the body portion of the boom. An aerial work vehicle characterized by being configured to guide the connecting line when the boom is extended by the body.