JPH09315792A - Line member installing mechanism in work boom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the derricking operation of a work boom without damaging a hose installed from the boom to a workbench, and to make the hose easily follow up, in the work boom, having a vertical post at the pointed end of the same. SOLUTION: A fuel transfer hose 21 is wound around an outer periphery of a head pin 14a at least one round, at a gap 18c formed between an outer side face of a vertical post 14 and an inner side face of a boom 13c. The size of the gap 18 is adjusted so that the vertical post 14 is oscillatable in the condition that the fuel transfer hose 21 is wound around the outer periphery of the head pin 14a, and the fuel transfer hose 21 can be loosely installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line-shaped member arranging mechanism for a work boom having line-shaped members such as hoses and cables connected to a work device provided at the tip of the boom.

[0002]

2. Description of the Related Art In an aerial work vehicle in which a work platform is provided at the tip of a boom that can be raised and lowered freely, in order to keep the work platform horizontal regardless of the up and down angle of the boom, always keep the boom tip vertically. A vertical post is provided for maintenance, and a workbench is attached to this vertical post. Here, an operating device for raising and lowering the boom is provided on the workbench, and hoses, cables, etc. extending from the operating device pass through the inside of the hollow boom and are controlled below the boom. Connect to the device.

The hose is arranged at the tip of the boom as shown in FIGS. 5 to 8.
First, the attachment of the vertical post 14 to the boom 13 will be described. At the tip of the boom 13, the opening 1
A boom head 18 is attached so as to cover the periphery of 3d, and this boom head 18 has a side plate 18 at its tip.
a and 18b are formed in a U shape, and both side plates 18
An intermediate portion of the vertical post 14 is pivotally supported by a head pin 14a so as to be swingable in the front-rear direction between a and 18b.

At the lower end of the vertical post 14, the boom 13 is
The rod-side end of the leveling cylinder 17 disposed inside is pivotally supported, and the vertical post 14 is swung by the expansion and contraction operation of the leveling cylinder 17. Here, when the boom 13 is in the raised state as shown in FIG. 5,
Lower end 14d of vertical post 14 from boom head 18
6 is small, and the lower end 14d has a large amount of projection in the fallen state as shown in FIG.

Next, the arrangement of the hose 51 will be described. A hose 51 that has grown in the interior space of the boom 13.
Goes out of the boom 13 through the gap 18c between the inner surface of the left side plate 18a and the left side surface (outer surface) 14b of the vertical post 14 from the opening 13d, and then is engaged with the lower surface of the arm 15 by the locking member 22. Be stopped. The arm 15 is configured to be horizontally rotatable with respect to the vertical post 14. A workbench (not shown) is provided at the tip of the arm 15 and the hose 51 extends to the workbench.

The hose 51 thus arranged is formed to have a length that will not be pulled even when the boom 13 is laid down. Therefore, boom 1
In the state where 3 is lifted, the slack of the hose 51 increases from the position where the hose 51 exits the gap 18c to the locking member 22.

[0007]

When the arm 15 is swung while the boom 13 is raised (the hose 51 has a large slack), the slack part of the hose 51 passes through the lower end 14d. Opposite side of vertical post 14 (right side)
May move to. Then, if the boom 13 is laid down in this state, the hose 51 may enter the gap 18d side opposite to the gap 18c from which the hose 51 has come out. From this state, as shown in FIG. When raised, the hose 51 is sandwiched between the inside of the right side plate 18b and the right side surface 14c of the vertical post 14,
There was a risk of damaging the hose 51.

Even if the hose 51 does not pass through the lower end portion 14d, it is located in the vicinity of the lower end portion 14d,
When the boom 13 is laid down as shown in FIG. 8, the hose 51 is caught due to the lower end portion 14d protruding, so that the hose 51 is pulled.
1 may be damaged.

Further, regardless of whether or not the hose 51 has passed through the lower end portion 14d, when the boom 13 is tilted down, the slack of the hose 51 becomes small as shown in FIG. 6, but the slack is small as described above. When the arm 15 is swiveled, the hose 51 is twisted and a kink is likely to occur, which may adversely affect the hose 51.

The present invention has been made in view of the above problems, and is a boom for work in which a working device is provided on a swinging member such as a vertical post disposed at the tip of a boom that can be raised and lowered. A line-shaped member arranging mechanism for a work boom that does not damage the line-shaped members such as hoses arranged in the work device from the boom even when the boom is hoisted and the line-shaped members smoothly follow It is intended to be provided.

[0011]

A line-shaped member arranging mechanism for a work boom according to the present invention for achieving the above object is provided.
Lines of hoses, cables, etc. extending from the work device to the boom member in the work boom in which the work device is attached to a swing member that is swingably supported by a pivot pin in the inner space at the tip of the boom member. An arranging mechanism for arranging the members. In this arrangement mechanism, at least one line member is wound around the outer periphery of the pivot pin in the gap formed by the outer surface of the swing member and the inner surface of the boom member. The size is such that the swing member can swing while the line member is wound around the outer periphery of the pivot pin, and the line member can be gently arranged.

Here, in order to smoothly swing the swinging member and prevent the line-shaped member from being damaged, the line-shaped member between the boom member and the working device is loosened (played).
However, according to the line-shaped member disposing mechanism of the work boom configured as described above, the pivot pin around which the line-shaped member is wound is the swing center of the swing member. Therefore, the play of the linear member can be reduced.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. First, an aerial work vehicle having a line-shaped member arranging mechanism for a work boom according to the present invention will be described with reference to FIG. This aerial work vehicle has a swivel base 12 which is rotatable on a vehicle body 11, and a telescopic boom 13 is attached to the swivel base 12 so as to be capable of undulating. The telescopic boom 13 is formed in a hollow shape and is telescopically (nested) telescopically movable. The base boom 13a, the intermediate boom 13b, and the tip boom 13 are telescopic.
The base boom 13a is pivotally supported on the swivel base 12 so as to be up and down.

A vertical post (swing member) 14 is attached to the tip of the tip boom 13c via a boom head 18. The vertical post 14 is always kept vertically by a leveling cylinder 17 that expands and contracts according to the hoisting motion of the boom 13. An arm 15 extending horizontally in the horizontal direction is attached to the upper end of the vertical post 14 so as to be horizontally rotatable, and a workbench 16 is attached to the tip of the arm 15 via a workbench bracket 16a.

An operator can be mounted on the work table 16, and the work table 16 is moved to an arbitrary work position through the turning operation of the turn table 12, the hoisting and retracting operation of the boom 13, and the turning operation of the arm 15 to perform work at a high place. It can be carried out. These operations are performed by driving a hydraulic actuator such as a hydraulic cylinder or a hydraulic motor, and this drive control is performed by the operator operating the operating device 19 attached to the workbench 16.

The hydraulic oil supplied to each hydraulic actuator is supplied from a hydraulic pump (not shown) arranged on the vehicle body 11. The hydraulic oil is supplied and discharged by a hose (line) for oil supply. Shaped member) 21. This hose 2
1 is provided so as to extend inside the boom 13 from the vehicle body 11, projects from the opening 13d (see FIG. 1) of the tip boom 13c, and is connected to the operating device 19 through the inside of the arm 15.

Here, in addition to FIG. 1, from the tip boom 13c to the operating device 1 corresponding to the working device described in the claims.
The arrangement of the oil supply hose 21 extending over the hydraulic actuator 9 and the hydraulic actuator will be described. The vertical post 14 is attached to the tip boom 13c in the same manner as described in the above-mentioned "Prior Art" (the boom 13 corresponds to the tip boom 13c), and therefore the same reference numerals are given and the description will not be given here. Omit it.

From the tip boom 13c to which the vertical post 14 is attached as described above, the hose 21 connected to the operating device 19 and the like extends, and the hose 21 has a gap 18c.
After going around the outer periphery of the head pin (pivotally supporting pin) 14a at the rear side, a through hole 14e penetrating in the front-rear direction in the vicinity of the central portion of the vertical post 14 is provided at the rear side (upper side of the boom 13)
From the front to the front side. The gap 18c is a dimension that allows the hose 21 to be gently arranged (freely moved) while the outer circumference of the head pin 14a makes one round, and does not hinder the swinging operation of the vertical post 14. Is formed in.

After that, after being locked and held by the locking member 22 on the lower surface of the arm 15, the arm 15 is swung into the inside of the arm 15 through an opening (not shown) opened in the lower surface of the arm 15. For example, it is connected to a turning motor, or is passed through the inside of the arm 15 to the outside through an opening on the side of the workbench 16 and connected to the operating device 19.

By arranging the hose 21 in this way, slack does not occur on the lower end 14d side of the vertical post 14 when the boom 13 is raised as shown in FIG. Further, since the hose 21 does not move to the front of the lower end portion 14d or move to the opposite side through the lower end portion 14d even when the arm 15 is swung, the boom 13 as shown in FIG. The hose 21 will not be pulled or pinched between the vertical post 14 and the boom head 18 even in the state in which the hose is laid down. Further, even when the boom 13 is in the prone state, the hose 21 has a play, and therefore the hose 21 does not cause a kink even when the arm 15 is turned.

In the embodiment of the invention described above, only one hose 21 is shown for convenience of explanation, but it is of course possible to provide a plurality of hoses 21. When there are a plurality of hoses, the gap 18d on the opposite side is provided. Also in this case, the hose may be arranged so that the outer circumference of the head pin 14a goes around once.
Here, the hose which has made at least one round of the outer circumference of the head pin 14a does not necessarily have to be arranged toward the workbench 16 after penetrating the vertical post 14, and does not pass through the through hole 14e, but from each gap 18c, 18d as it is. Arm 15
You may arrange | position toward.

In the embodiment of the invention described above, the case where the hose is provided has been described as an example of the line-shaped member. However, it is needless to say that the line-shaped member having another structure such as an electric wire or an optical fiber cable may be used. Good. Further, the arm 15 is not always necessary, and the vertical post 14 may be directly attached to the workbench 16 or the workbench bracket 1.
Of course, it can also be used for a work boom provided with 6a.

[0023]

According to the above-described mechanism for arranging the line member of the work boom, the line member such as the oil feeding hose can be
The head post, which is the swing center of a swing member such as a vertical post, is wound around the outer circumference. Therefore, the line-shaped member can easily follow the boom when the boom is raised or lowered, that is, the swinging motion of the swinging member is performed, and thus the play of the line-shaped member for improving the followability is reduced. be able to. Therefore, the line-shaped member does not get caught on the swinging member or get caught between the swinging member and the boom during the operation of the swinging member.

[Brief description of drawings]

FIG. 1 is a perspective view showing a line member arranging mechanism of a work boom according to the present invention.

FIG. 2 is a side view of an aerial work vehicle including the line-shaped member arranging mechanism for the work boom.

FIG. 3 is an enlarged view of a boom tip portion when the boom is raised.

FIG. 4 is an enlarged view of a boom tip end portion when the boom is in a lying state.

FIG. 5 is a perspective view of a boom tip portion showing a conventional arrangement of line-shaped members.

FIG. 6 is an enlarged view of the lying state of the boom.

FIG. 7 is an enlarged view of the boom in a raised state.

FIG. 8 is an enlarged view of the boom in a fallen state.

[Explanation of symbols]

 13 boom 14 vertical post (oscillating member) 15 arm 16 workbench 18 boom head 21,51 hose (line-shaped member)

Claims (1)

[Claims] 1. A hollow boom member, a swing member swingably supported on the boom member by a pivot pin in an inner space at the tip of the boom member, and a boom member of the boom member. Work consisting of a working device located outside and attached to the swinging member, and a line-shaped member such as a hose and a cable, the one end extending to the working device and the other end extending to the boom member. In the boom for use, the line-shaped member is wound around the outer periphery of the pivot pin at least once in a gap formed between the outer surface of the swing member and the inner surface of the boom member, and the size of the gap. However, it is characterized in that the swing member can swing in a state where the line member is wound around the outer periphery of the pivot pin, and the line member can be gently arranged. Work for the boom of the line-shaped member disposed mechanism.