JPH0546894U - 5-stage telescopic boom oil and power transmission device - Google Patents

Abstract

(57) [Summary] [Purpose] It was made possible to feed and store hoses and cables according to the extension and contraction of the 5-stage telescopic boom without using a reel device for winding and unwinding hoses. Provide oil and power transmission equipment. [Structure] The oil supply / power transmission device 10 includes a first hose (or a cable) H that holds a hose (or a cable) H at a tip portion of a first boom 21.
The holding means 11, the third holding means 13 that holds the hose H at the base end of the third boom 23, and the fifth boom 25.
Fifth holding means 1 for holding the hose H at the base end of the
5 and. Further, the second sheave 12 attached to the base end portion of the second boom 21 and around the hose H between the first holding means 11 and the third holding means 13 and the bottom side end of the cylinder tube 28b of the telescopic cylinder 28. And a fourth sheave 14 which is attached to the section and which hangs around a hose H between the third holding means 13 and the fifth holding means 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-stage telescopic boom, and more particularly to a 5-stage telescopic boom oil supply / power transmission device for arranging hydraulic hoses, electric / optical cables, and the like in the 5-stage telescopic boom.

[0002]

[Prior Art]

 For example, an aerial work vehicle is provided with a multi-stage telescopic boom that is telescopically extendable and retractable, and a work bench for mounting a worker is attached to the tip of the multi-stage telescopic boom. Inside such a multi-stage telescopic boom, in addition to the telescopic cylinder and wire mechanism that perform the expansion and contraction operation of the multi-stage telescopic boom, a hose for sending hydraulic pressure from the vehicle body (base) side to the workbench side, and the vehicle body side A cable for transmitting electric signals and optical signals is provided between the work table and the work table. A reel device was attached to the vehicle body, and the hoses and cables were unreeled or wound up from the reel device according to the expansion and contraction of the multistage telescopic boom.

[0003]

[Problems to be solved by the device]

 However, even among multi-stage telescopic booms, for example, in the case of a 5-stage multi-stage telescopic boom (5-stage telescopic boom) that is used to increase the lift of the workbench, the length of the hose or cable that corresponds to the full extension state is It will also be quite long. Therefore, there is a problem that the reel device, which winds up most of the hoses and cables when the five-stage telescopic boom is fully contracted, becomes large.

The present invention has been made in view of such a problem, and it is possible to extend or contract a hose or a cable according to the extension and contraction of a 5-step telescopic boom without using a reel device. The purpose of the present invention is to provide a 5-stage telescopic boom oil transmission / transmission device.

However, the five-stage telescopic boom mentioned here includes a first boom attached to a base, a second boom telescopically inserted in the first boom, and an extension / contraction in the second boom. The third boom is freely inserted, the fourth boom is telescopically inserted into the third boom, and the fifth boom is telescopically inserted into the fourth boom. It is a thing. Further, the piston rod of the telescopic cylinder for extending and contracting the fourth boom and the fifth boom with respect to the third boom is attached to the base end of the third boom, and the cylinder tube of the telescopic cylinder is attached to the fourth boom. It is attached to the base end of.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the oil sending / transmitting device of the present invention, a first holding means for holding a cable or a hose is attached to the front end of the first boom, and the above is attached to the base end of the third boom. A third holding means for holding the cable or hose is attached, and a fifth holding means for holding the cable or hose is also attached to the base end portion of the fifth boom. Further, a second sheave for hooking around a portion of the cable or hose between the holding portion by the first holding means and the holding portion by the third holding means is attached to the base end portion of the second boom, and the telescopic cylinder is also provided. At the bottom side end of the cylinder tube in, the fourth sheave for attaching the portion of the cable or hose between the holding portion by the third holding means and the holding portion by the fifth holding means is attached.

[0007]

[Action]

 In such an oil sending / transmitting device, a portion of the hose or cable between the holding portion of the first holding means and the holding portion of the third holding means, and the portion of the holding portion of the third holding means and the holding portion of the fifth holding means. These parts are drawn out and stored according to the extension and contraction of the second and third booms with respect to the first boom and the expansion and contraction of the fourth and fifth booms with respect to the third boom. Therefore, it is possible to obtain the length of the hose or the cable corresponding to the extended state of the 5-step retractable boom without using the reel device. Furthermore, the hoses or cables can be smoothly drawn out and stored by being stretched around the second and fourth sheaves to give an appropriate tension to the hose or cable.

[0008]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, FIG. 2 shows a 5-step telescopic boom 20 equipped with an oil feeding / power transmitting device according to the present invention. The five-step telescopic boom 20 is attached to an upper part of a swivel base 32 which is provided on a vehicle body (base) 31 of an aerial work vehicle 30 in a horizontal swiveling manner. More specifically, the first boom 21 pivotally attached to the upper part of the swivel base 32 so as to be up and down, the second boom 22 telescopically inserted into the first boom 21, and the inside of the second boom 22. Third boom 23 telescopically inserted into the third boom 23, fourth boom 24 telescopically inserted into the third boom 23, and fifth boom 25 telescopically inserted into the fourth boom 24. It is configured like a telescope from.

A workbench 35 is attached to the tip end of the fifth boom 25, and an operator on the workbench 35 swings the swivel base 32 and raises and lowers the five-stage telescopic boom 20 to extend and retract. It can be moved to any height through operation.

As shown in FIG. 1, the expansion / contraction operation of the second boom 22 and the third boom 23 with respect to the first boom 21 is performed by the first expansion / contraction cylinder 26 and the first expansion cylinder 26 incorporated in the booms 21, 22, 23. It is performed by the 1-wire mechanism 27. The end of the piston rod 26a of the first telescopic cylinder 26 is attached to the base end of the first boom 21, and the rod side end of the cylinder tube 26b is attached to the base end of the second boom 22. Therefore, when the first telescopic cylinder 26 is telescopically operated, the second boom 22 is telescopically moved with respect to the first boom 21.

Further, the first wire mechanism 27 is wound around the first telescopic sheave 27a that is rotatably attached to the bottom side end of the first telescopic cylinder 26, and the first telescopic sheave 27a. It is composed of a wire 27b. One end of the wire 27b is attached to the base end of the first boom 21, and the other end is attached to the base end of the third boom 23. Therefore, as the first telescopic cylinder 26 extends, the first telescopic sheave 27a moves in the extension direction of the 5-stage telescopic boom 20 (hereinafter, this direction is simply referred to as the extension direction), and The boom 23 is pulled up by the wire 27b and extends and moves with respect to the first boom 21 and the second boom 22. Although not shown, the third boom 23 can be reduced and moved by a similar wire mechanism.

On the other hand, the telescopic operation of the fourth boom 24 and the fifth boom 25 with respect to the third boom 23 is performed by the second telescopic cylinder 28 (“extendable cylinder” in the claims) built in the booms 23, 24, 25. And the second wire mechanism 29. The end of the piston rod 28a of the second telescopic cylinder 28 is attached to the base end of the third boom 23, and the rod-side end of the cylinder tube 28b is attached to the base end of the fourth boom 24. Therefore, when the second telescopic cylinder 28 expands and contracts (operates in conjunction with the first telescopic cylinder 26), the fourth boom 24 expands and contracts with respect to the third boom 23.

The second wire mechanism 29 is wound around the second telescopic sheave 29a, which is rotatably attached to the bottom side end of the second telescopic cylinder 28, and the second telescopic sheave 29a. It is composed of a wire 29b. One end of the wire 29b is attached to the base end of the third boom 23, and the other end is attached to the base end of the fifth boom 25. Therefore, the second telescopic sheave 29a moves in the extension direction along with the extension operation of the second telescopic cylinder 28, so that the fifth boom 25 is pulled up by the wire 29b and the third boom 23 and the fourth boom 23 are moved. It extends and moves with respect to the boom 24. It should be noted that the fifth wire 25 can be reduced and moved by a similar wire mechanism (not shown).

Next, the above-described oil feeding / power transmitting device provided in the 5-stage telescopic boom 20 configured as described above will be described with reference to FIG. The hose here is a hydraulic hose for supplying hydraulic pressure from the vehicle body 31 side to the workbench 35 side, and the cable is an operation signal or other electrical / electrical connection between the vehicle body 31 side and the workbench 35 side. An electrical or optical fiber cable for transmitting optical signals.

The oil supply / power transmission device 10 is rotatably attached to a first clamp (first holding means) 11 attached to an upper end of a first boom 21 and a base end of a second boom 22. The second sheave 12 and a pair of third clamps (third holding means) 13 and 13 mounted inside the base end portion of the third boom 23. Further, at the bottom end of the cylinder tube 28b of the second telescopic cylinder 28, a fourth sheave 14 rotatably mounted in parallel with the second expansion sheave 29a and a base end of the fifth boom 25 are provided. It also has a fifth clamp (fifth holding means) 15 attached to the.

A hose or cable (hereinafter referred to as a hose H) arranged in the extending direction along the outside of the upper surface of the first boom 21 from the side of the vehicle body 31 is first fixed to the first boom 21 by the first clamp 11. The five-stage telescopic boom 20 is held in the upper part of the tip and is turned inward toward the upper surface of the first boom 21, and is arranged in the contraction direction of the 5-step telescopic boom 20 (hereinafter, this direction is simply referred to as the contraction direction). The hose H and the like at the end thereof are wound around the second sheave 12 by a half turn and are arranged in the extension direction, and the third clamp 13 on one side inwardly upper the base end portion of the third boom 23 (the second telescopic cylinder 28). Above). Further, the hose or the like further ahead is bent into an S shape and is held by another third clamp 13 at the lower inner side of the base end portion of the third boom 23 (below the second telescopic cylinder 28).

The hoses H and the like ahead of both the third clamps 13 and 13 are arranged in the third to fifth booms 23 to 25 along the lower surface of the second telescopic cylinder 28 in the extending direction, and the fourth sheave. It is arranged in the contracting direction along the upper surface of the second telescopic cylinder 28 while being wound around 14 by a half turn. Further, the hose H and the like further ahead are held by the fifth clamp 15 on the upper end of the base end of the fifth boom 25, and are inverted to the outer side of the upper surface of the fifth boom 25 to extend along the outer side of the upper surface of the fifth boom 25. Are arranged in the extension direction. In this way, the leading edge of the hose or the like H reaches the workbench 35, as shown in FIG.

In the oil transmitting / transmitting device 10 configured as above, when the second boom 22 and the third boom 23 extend and contract with respect to the first boom 21, the hose between the first clamp 11 and the third clamp 13 is extended. The H and the like are delivered in the extension direction or stored in the contraction direction while moving the portion around which the second sheave 12 is hooked.

Further, when the fourth boom 24 and the fifth boom 25 expand and contract with respect to the third boom 23, the hose H between the third clamp 13 and the fifth clamp 15 moves to the fourth sheave 14. While moving the hanging part, it is paid out or stored in the same way as above.

Therefore, even if the reel device for winding up and unwinding the hose H on the vehicle body 31 is not provided, the five-stage telescopic boom 20 can be telescopically operated in its entirety from the vehicle body 31 side. The length of the hose etc. required up to 35 can be obtained. Since the hose H is maintained in a certain tension state by being hung around the second sheave 12 and the fourth sheave 14, it may interfere with the operation of the telescopic cylinders 26, 28 and the wire mechanisms 27, 29. There is no such thing.

In addition, although the above-mentioned embodiment describes the five-stage telescopic boom attached to the aerial work vehicle, the oil supply / power transmission device according to the present invention is applicable to work vehicles other than the aerial work vehicle. It can also be used for a 5-stage telescopic boom that can be attached.

[0022]

[Effect of the device]

 As described above, in the oil sending / transmitting device of the present invention, the hose or cable can be extended or stored inside the 5-step telescopic boom in response to the telescopic operation of the 5-step telescopic boom. Therefore, the length of the hose or the like corresponding to the extension length of the 5-step telescopic boom can be obtained without providing a reel device or the like on the outside of the 5-step telescopic boom as in the conventional case.

In the 5-step telescopic boom, the hose or the like can be stretched around the sheave to give an appropriate tension to the hose or the like. Therefore, it is possible to prevent the hose or the like from sagging and hindering the operation of other devices (the telescopic cylinder or the like) arranged in the 5-stage telescopic boom.

[Brief description of drawings]

FIG. 1 is an oil transmission / power transmission device according to the present invention and its oil transmission
It is a side view of the 5-step telescopic boom provided with the power transmission device.

FIG. 2 is a side view of an aerial work vehicle equipped with the 5-step telescopic boom.

[Explanation of symbols]

 10 Oil Transmission / Power Transmission Device 11 1st Clamp 12 2nd Sheave 13 3rd Clamp 14 4th Sheave 15 5th Clamp 20 5 Step Telescopic Boom 21 1st Boom 22 2nd Boom 23 3rd Boom 24 4th Boom 25 5th Boom H hose or cable

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B66F 9/06 L 7515-3F 11/04 7515-3F

Claims (1)

[Scope of utility model registration request] 1. A first boom mounted on a base, and a second boom telescopically inserted in the first boom,
A third boom telescopically inserted into the second boom, a fourth boom telescopically inserted into the third boom, and a fifth boom telescopically inserted into the fourth boom. And a piston rod of a telescopic cylinder for telescopically extending and retracting the fourth boom and the fifth boom relative to the third boom, the piston rod of the telescopic cylinder being attached to the base end of the third boom. In a 5-stage telescopic boom in which a cylinder tube is attached to the base end portion of the fourth boom, a 5-stage telescopic boom for disposing a hose or a cable from the base side to the tip side of the fifth boom is provided. An oil / power transmission device, comprising: first holding means attached to the tip of the first boom and holding the cable or hose; and attached to the base of the third boom. Third holding means for holding the cable or the hose, fifth holding means attached to the base end of the fifth boom for holding the cable or the hose, and attached to the base end of the second boom. A second sheave for hooking a portion between the holding portion by the first holding means and the holding portion by the third holding means in the cable or the hose, and the bottom side end portion of the cylinder tube in the telescopic cylinder. And a fourth sheave for hooking around a portion of the cable or the hose between the holding portion of the third holding means and the holding portion of the fifth holding means. Oil and power transmission device for telescopic boom.