JPH0420868Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to an oil supply device for a telescopic boom used in a digging pole construction vehicle, an aerial work vehicle, etc.

(2) Prior art A retractable boom refueling device that allows multiple refueling hoses to be spanned without increasing the width of the boom has been developed in the past, as described in Japanese Utility Model Publication No. 61-41507, for example. It is publicly known.

(3) Problems to be solved by the invention However, in the conventional telescopic boom oil delivery system, the width of the groove on the axial center side of the sheave is narrower than the width of the groove on the outer periphery of the sheave. Since multiple grooves with different widths are provided and hoses with different diameters are strung through these grooves, each hose is fed out by the rotation of the sheave and when stored, the hoses strung around the axis of the sheave There is a problem in that the length of the hose that is stretched around the outer circumference increases, and the hose on the outer circumference becomes sagging. There is a problem with getting used to it.

(4) Means for solving the problem In order to solve the above problem, the present invention has a method in which multiple hoses are routed along the side of the telescoping boom in an arc shape while remaining along the telescoping boom. In a retractable boom oil supply system in which the hoses are bent and reversed and both ends of these hoses are connected to the base boom side and the tip boom side, a guide that slides along the retractable boom in conjunction with the expansion and contraction of the intermediate boom, A plurality of rollers arranged in a first arc shape and a plurality of rollers arranged in a second arc shape having a larger arc radius than the plurality of rollers arranged in the first arc shape are pivoted concentrically, and these rollers are arranged in a concentric manner. A plurality of rollers pivoted in a first arc shape and a second
The hoses are each wrapped around a plurality of rollers pivoted in an arc shape and then turned over.

(5) Effect With the above configuration, by extending and retracting the telescoping boom, the rollers pivoted in the first arc shape and the second arc shape to the guide interlocking with the intermediate boom make the telescoping boom move in the same manner as the telescoping stroke. A length of hose is paid out and retracted to supply pressure oil to the tip boom.

(6) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, an intermediate boom 2 and a tip boom 3 are connected to a base boom 1 in a telescopic manner, and the intermediate boom 2 and tip boom 3 extend and contract sequentially or simultaneously. A bracket 4 to which a drilling device 5 driven by hydraulic pressure is attached is fitted to the outer periphery of the intermediate boom 2, and this bracket 4 is attached to the base boom 1.
It is selectively locked to the tip and intermediate boom 2 or the tip boom 3 of.

A cover 15 that opens on the tip side is attached to the side surface of the base boom 1, and the tip inside the cover 15 is attached to the intermediate boom 2 when the drilling device 5 is used, and slides in conjunction with the expansion and contraction of the intermediate boom 2. A guide 16 is housed, and a large diameter roller 17 is pivotally supported at the base of the guide 16, as shown in FIG. The radius of the arc of the plurality of rollers 18 pivoted in the first arc shape is larger than the radius of the roller 17, and the plurality of rollers 18 pivoted in the first arc shape are The radius of the plurality of rollers 19 pivoted in a second arc shape is larger than the radius of the roller 17, the first arc pivoted with the plurality of rollers 18, and the plurality of They are located concentrically in the order of the second arc around which the roller 19 is pivoted.

Three pipes 6, 7, and 8 connected to switching valves (not shown) extend from the tip side of the side surface of the base boom 1, and the tips of each pipe 6, 7, and 8 are arranged vertically in a straight line. There is. One end of a hose 9, 10, 11 is connected to each of these pipes 6, 7, 8, and each hose 9, 10, 11 is connected to the rear of the base boom 1 along the side of the base boom 1 while being arranged vertically. The hose 9 is routed to the end side, and the hose 9 is wrapped around a roller 17 and reversed, the hose 10 is routed around a plurality of rollers 18 pivoted in a first arc shape and reversed, and the hose 11 is routed around a second The pipes 12, 1 are rotated around a plurality of rollers 19 pivotally supported in an arc shape, are inverted, are extended from the bracket 4 of the drilling device 5, and are housed in the guide 16.
The other ends are connected to 3 and 14, respectively.

With the above configuration, the bracket 4 of the hole digging device 5
When the intermediate boom 2 and the tip boom 3 are locked to the tip boom 3 and the intermediate boom 2 and the tip boom 3 are extended from the boom retracted state shown in FIG.
The hoses 9, 10, 11 are pulled by the hoses 3, 14, and the guide 16 slides as the intermediate boom 2 extends, thereby causing the roller 17, the plurality of rollers 18 pivoted in a first arc shape, and Second
A plurality of rollers 19 pivoted in an arc shape move,
Hoses 9, 10, 11 are let out as shown in FIG.

When the boom is retracted, the pipes 12 and 1 are moved due to the movement of the bracket 4 as the tip boom 3 is retracted.
3 and 14 push the hoses 9, 10, and 11, and the guide 16 slides as the intermediate boom 2 contracts, thereby causing the roller 17, the plurality of rollers 18 pivoted in a first arc shape, and the A plurality of rollers 19 pivotally supported in an arc shape move, and the hoses 9, 10, 11 are stored in a movement opposite to that when they are extended, without becoming entangled or sagging.

(7) Effects of the invention As described above, according to the invention, the plurality of rollers arranged in the first arc shape and the plurality of rollers arranged in the second arc shape are arranged in a concentrically supported manner. Since the hoses were wrapped around each other and turned over, the lengths of the hoses for the oil supply device to be fed out and stored are the same.
To provide a telescoping boom oil delivery device that does not have a sagging hose and operates smoothly.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a detailed view of the main parts, FIG. 2 is a side view showing the telescopic boom in the contracted state, and FIG. 3 is a side view showing the telescopic boom in the extended state. 1... Base boom, 2... Intermediate boom, 3... Tip boom, 9, 10, 11... Hose, 16...
Guide, 17, 18, 19... Laura.

Claims (1)

[Scope of utility model registration request] A telescoping system in which multiple hoses are routed along the side of the telescoping boom, are bent into an arc while remaining along the telescoping boom, and then reversed, and both ends of these hoses are connected to the base boom side and the tip boom side. In the oil supply device on the boom side, a plurality of rollers arranged in a first arc shape and a plurality of rollers arranged in a first arc shape are attached to a guide that slides along the telescoping boom in conjunction with the extension and contraction of the intermediate boom. A plurality of rollers arranged in a second arc shape having a large arc radius are pivoted concentrically,
An oil supply device for a telescopic boom, characterized in that the hose is wrapped around a plurality of rollers pivoted in a first arc shape and a plurality of rollers pivoted in a second arc shape, respectively, and then reversed.