JP2000313595A - Line-shaped member hanging device - Google Patents

Abstract

(57) [Problem] To prevent damage to a linear member protruding from a boom and extending through a bending / extending boom to a work table even when the bending / extending boom is swung. A telescopic boom (9) is provided with a boom bracket (15) pivotally connected to a leveling cylinder (27) and swingably connected to a distal end thereof, and a parallel link mechanism (17) at the distal end of the boom bracket (15). The boom bracket 15 has a connecting shaft 25 protruding in the horizontal direction, and a hanging member 30 formed by spirally winding a thin plate having elasticity is mounted on the connecting shaft 25. After a linear member 49 such as an electric wire or a hose through which oil flows is projected from the end of the telescopic boom 9, the linear member 49 is looped around the member 30, and then the parallel link mechanism 17 is rotated.
, And further connected to a boom operating device 47 provided on the work table 39. The hanging member 30 is a linear member 49.
Of the connecting shaft 25
.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for hanging a line-shaped member, and more particularly, to a boom provided at least on a vehicle body so as to be able to move up and down. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear member hanging device for hanging a linear member such as an electric wire or a hydraulic pipeline protruding from a boom and extending to a bending / boom at a base of the bending / boom.

[0002]

2. Description of the Related Art An aerial work vehicle has a telescopic boom that can be raised and lowered and swiveled on a vehicle body, a bending / extension boom that can swing up and down at the tip of the telescopic boom, and a work table at the tip of the bending / extension boom. There is something. A turntable is provided on the vehicle body, and the turntable is turned by the operation of a turn motor provided in the vehicle body. A telescopic boom is pivotably connected to the upper part of the swivel base so as to be vertically swingable. The telescopic boom is raised and lowered by a telescopic operation of a raising and lowering cylinder pivotally connected between the telescopic boom and the rotary base. A telescopic cylinder is built in the telescopic cylinder, and the telescopic boom is extended by the telescopic operation of the telescopic cylinder.

The bending / extension boom includes a boom bracket provided at the tip of the telescopic boom so as to be swingable in the vertical direction, and an upper link provided at the tip of the boom bracket in parallel with a predetermined gap in the vertical direction. A member and a lower link member,
An arm bracket is provided at the ends of the upper link member and the lower link member so as to be vertically swingable, and an elevating cylinder pivotally connected between the boom bracket and the upper link member. The boom bracket, upper link member, lower link member, and arm bracket constitute a parallel link mechanism. A work table is attached to the tip of the arm bracket.

[0004] The workbench is provided with a boom operating device for moving the workbench to a desired position through a swiveling operation of the swivel base, an up-and-down operation of the telescopic boom, a telescopic operation, or an elevating operation of the bending and extending boom. The turning table, the telescopic boom, and the bending / extension boom are operated by operating hydraulic actuators such as hydraulic cylinders and hydraulic motors. The hydraulic oil supplied to each hydraulic actuator is supplied from a hydraulic pump provided on the vehicle body. The supply and discharge of the hydraulic oil are performed by an oil supply hose. The hose extends from the vehicle body into the telescopic boom and protrudes from an opening at the tip of the telescopic boom.

[0005] The boom bracket is provided with a pin projecting in the horizontal direction. A hose protruding from the distal end opening of the telescopic boom is wound around at least one circumference of the pin and extends along the lower surface of the upper link member, and is connected to a hydraulic actuator such as a worktable operating device or a lifting cylinder. I have. Since the hose is hung around the pin, even if the bending / extension boom swings up and down, the hose is drawn out of the pin and returned according to the swing angle of the bending / extension boom. For this reason, it is possible to prevent a large tension from being applied to the hose.

[0006]

However, when the bending / extending boom swings up and down, the hose slides on the outer periphery of the pin and is fed out, so that the outer periphery of the hose may be damaged. Further, friction occurs between the pin and the hose when the hose is extended, so that a large tension acts on the hose and the hose may be damaged.

When the bending angle of the bending / extending boom is large, the hose must be wound around the outer periphery of the pin with a large diameter. However, there is a problem that it is difficult to arrange the hose compactly.

The present invention has been made in view of such a problem, and a hose can be compactly disposed around a pin even when the bending angle of the boom is large, and the hose is extended from the pin. An object of the present invention is to provide a line-shaped member hanging device that can prevent damage to a hose.

[0009]

In order to solve the above-mentioned problems, a linear member hanging apparatus according to the present invention comprises a substrate and a shaft protruding from the substrate (for example, the connecting shaft 2 in the embodiment).
5) and a hanging member formed in a cylindrical shape that is rotatably fitted to the outside in the radial direction of the shaft and is capable of extending and contracting in the radial direction, and is wound around the outer periphery of the hanging member by at least one round. It is preferable to be configured to include the provided linear member.

When the line-shaped member is fed from the hanging member, the line-shaped member comes into close contact with the outer periphery of the hanging member, and the line-shaped member elastically contracts in the radial direction by the line-shaped member, and the feeding amount of the line-shaped member. The swinging member rotates in response to the rotation. At this time, since a large frictional force acts between the line-shaped member and the hanging member, the line-shaped member almost never slides on the hanging member. For this reason, damage due to sliding of the linear member can be prevented. Further, even if the feeding amount of the line-shaped member becomes large, the hanging member rotates around the axis, so that a large tension does not act on the line-shaped member, and damage due to excessive tension can be prevented.

Further, when the extended line-shaped member is returned, the hanging member expands in the radial direction, and the hanging member rotates on the shaft in accordance with the return amount of the returned line-shaped member. The linear member can be returned without sliding, and the linear member does not loosen greatly from the hanging member, and can be disposed compactly around the axis.

Here, the hanging member may be formed by spirally winding a thin plate having elasticity and may be detachable from the shaft. By fitting a loop member formed of a thin elastic plate in a spiral shape around the shaft, the loop member having elasticity around the shaft can be mounted. Further, since the hanging member is formed by spirally winding a thin plate having elasticity, it can be easily attached to and detached from the shaft.

Further, the inside diameter of the hanging member is larger than the outside diameter of the shaft, and the hanging member elastically contracts and expands in accordance with the extension of the linear member, so that the substrate can be moved up and down at least on the vehicle body. A boom bracket pivotally connected to a tip end of a provided boom (for example, a telescopic boom 9 in the embodiment), and connects one end of the linear member to the boom and the other end of the linear member. Is connected to an arm member (for example, the upper link member 35 and the lower link member 37 in the embodiment) that can swing up and down at the tip of the boom bracket, and is connected to the arm member according to the swinging of the arm member in the up and down direction. The drawn linear member may be paid out and returned.

When the arm member swings up and down, the line-shaped member connected to the arm member is extended or repeated according to the swing angle. At this time, the hanging member elastically contracts or expands in the radial direction by the line-shaped member, and rotates in accordance with the feeding amount of the line-shaped member. For this reason, since the line-shaped member hardly slides on the outer periphery of the hanging member, damage due to the sliding can be prevented, and even when the swing angle of the arm member is large, the line-shaped member is It can be arranged compactly around the axis without greatly loosening from the hanging member.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS. This embodiment shows an aspect of an aerial work vehicle having a telescopic boom that can be raised and lowered and pivotable on a vehicle body, and a bending / extension boom that can vertically bend and extend at the tip of the telescopic boom. Before describing the linear member hanging device of the present invention, an aerial work vehicle equipped with the linear member hanging device will be described first. FIG.
1 is a rear side view of an aerial work vehicle, and FIG.
As shown in the figure, the truck is configured as a base, and an outrigger jack 5 is provided on each of the front and rear sides of the vehicle body 3 so as to protrude to the side of the vehicle body 3 and to stably support the vehicle body 3 by grounding its lower end. Have been. At the rear center of the vehicle body 3, a turning motor 6 protruding upward and provided in the vehicle body 3.
Is provided with a swivel 7 which is swiveled by the operation of. A telescopic boom 9 that can swing vertically is provided at the upper part of the swivel 7.

The telescopic boom 9 is a cylindrical base boom member 9a pivotally supported on the upper part of the swivel base 7 so as to be able to move up and down, and a tube inserted into the base boom member 9a so as to be able to expand and contract in the longitudinal direction. -Shaped intermediate boom member 9b and this intermediate boom member 9b
A tubular distal end boom member 9c inserted in the inside so as to be able to expand and contract in the longitudinal direction is nested. An up / down cylinder 11 is pivotally connected between the base end boom member 9a and the swivel table 7, and the entire extension / retraction boom 9 is up / down operated by the extension / retraction operation of the up / down cylinder 11. A telescopic cylinder (not shown) is built in the telescopic boom 9, and the telescopic cylinder is configured to be able to telescopically operate and telescopically operate the telescopic boom 9 as a whole.

A bending boom 13 is provided at the tip of the tip boom member 9c. The bending / extension boom 13 includes a boom bracket 15 pivotally connected to the tip of the tip boom member 9c so as to be vertically swingable, a parallel link mechanism 17 connected to the tip of the boom bracket 15, and a parallel link mechanism 17
And a worktable bracket 19 pivotally connected to the tip of the worktable so as to be vertically swingable. FIG. 2 shows I in FIG.
A plan view of a portion corresponding to the arrow is shown, and as shown in the figure, the tip of the tip boom member 9c is formed in a U-shape, and the right and left ends project toward the tip (downward in FIG. 2). A pair of protrusions 21 are provided. A pair of protrusions 2
A boom bracket 17 is pivotally supported on the inside of the tip of 1.

The boom bracket 17 comprises a pair of substrates 23 arranged with a certain gap in the left-right direction and a pair of substrates 2.
3 and a connection shaft 25 for connecting the respective central portions. A leveling cylinder 27 is provided inside the distal end of the distal end boom member 9c. The bottom end of the leveling cylinder 27 is pivotally connected to the distal end of the distal end boom member 9c, and the rod side end is located on the right base 23 of the boom bracket 17. Is pivoted to the lower end. Therefore, the tilting angle of the boom bracket 17 can be maintained at a predetermined angle regardless of the up-down angle of the telescopic boom 9 by operating the leveling cylinder 27 to expand and contract.

A loop member 30 is attached to the outer periphery of the connecting shaft 25. As shown in FIG. 3, the hanging member 30 is formed by spirally winding a thin metal plate 31 having elasticity (for example, stainless steel having a thickness of about 0.3 mm) into a cylindrical shape. The inner diameter d1 of the hanging member 30 is formed larger than the outer diameter d2 of the connecting shaft 25 shown in FIG. The hanging member 30 is detachable from the connecting shaft 25. When the hanging member 30 is mounted on the connecting shaft 25, the hanging member 30 is rotatably mounted.
The hanging member 30 may have elasticity, and may be made of resin (for example, resin having a thickness of about 1 to 2 mm).

A parallel link mechanism 17 is provided at the tip of the boom bracket 15 shown in FIG. The parallel link mechanism 17 includes a pair of upper link members 3 which are disposed outside the respective tip portions of the pair of substrates 23 with a predetermined gap in the left-right direction.
5 and a pair of lower link members 37 disposed parallel to each other with a predetermined gap below the upper link member 35 shown in FIG. The upper link member 35 and the lower link member 37 have the same length,
And each end of the lower link member 37 on the boom bracket 15 side is pivotally connected to the boom bracket 15, and the upper link member 35
Each end on the distal end side of the lower link member 37 is pivotally connected to the workbench bracket 19, and the upper link member 35 and the lower link member 37 constitute a parallel link. As a result, by holding the upper surface of the boom bracket 15 horizontally, the work table 39 connected to the work table bracket 19 can be held in a horizontal state.

An elevating cylinder 41 is pivotally connected between a substantially central lower portion of the upper link member 35 shown in FIG. 2 and a lower end of the base 23 on the left side of the boom bracket 15. The link mechanism 17 bends and extends vertically with respect to the boom bracket 15 to move the workbench 39 vertically. A vertical post 43 stands upright on the workbench bracket 19, and a horizontal arm 45 protruding in the horizontal direction is attached to the upper portion of the vertical post 43, and a workbench on which a worker can ride is mounted on the tip of the horizontal arm 45. 39 are provided.

The work table 39 is provided with a boom operating device 47 for moving the work table 39 to a desired position through the turning operation of the swivel table 7, the raising / lowering / expanding operation of the telescopic boom 9 or the raising / lowering operation of the bending / extending boom 13 shown in FIG. Is provided. The operation of the swivel 7, the telescopic boom 9, or the bending / extension boom 13 is operated by the operation of the rotary motor 6, the telescopic cylinder, and the elevating cylinder 41 (hereinafter, these are collectively referred to as “hydraulic actuators”). The supplied working oil is a hydraulic pump (not shown) provided on the vehicle body 3.
The supply and discharge of the hydraulic oil is performed by an oil supply hose. Further, the operation of the boom operation device 47 is operated by supplying power from a battery (not shown) provided in the vehicle body 3, and the power is transmitted by electric wires. The hose and the electric wire are bundled and extend from the vehicle body 3 to the inside of the telescopic boom 9 and protrude from the distal end of the telescopic boom 9 shown in FIG. The hose and the electric wire are collectively referred to as a “line-shaped member 49” hereinafter.

The linear member 49 protruding from the tip of the telescopic boom 9 is extended and fixed to the lower surface of the upper link member 35 on the left side and the end on the boom bracket 15 side after the loop member 30 is looped around once. And the upper link member 3
5 and is connected to the boom operating device 47 of the work table 39 and the lifting cylinder 41. That is,
The line member hanging device 51 includes the boom bracket 15.
And the loop member 30 and the line-shaped member 49.

Next, a description will be given of the operation of the linear member hanging device 51 of the present invention in the case where the aerial work vehicle 1 is used for aerial work. First, with the telescopic boom 9, the work bench 39, and the outrigger jack 5 stored in the body 3 of the aerial work vehicle 1 shown in FIG. Boarding the worktable 7 from. Then, the worker who has boarded the worktable 7 has the boom operating device 47.
To operate the hydraulic actuator and
To near the work site.

FIGS. 4B and 5B show II-I when the bending and stretching boom 13 shown in FIG. 2 swings vertically.
FIG. 3 shows a cross-sectional view of a portion corresponding to the view in the direction of arrow I. The operator moves the work table 39, which has been moved to the vicinity of the work site, further downward to improve the easiness of work.
When the lifting cylinder 41 shown in FIG. 4A is reduced by operating the button 7, the linear member 49 shown in FIG. 4B is pulled in the direction of arrow IV. The pulled line member 49 is in close contact with the outer periphery of the hanging member 25, and the hanging member 25 is elastically reduced radially inward by the line member 49, and is wound according to the amount of extension of the line member 49. The member 30 rotates. At this time, since a large frictional force is generated between the linear member 49 and the hanging member 30, the linear member 49 is
Almost no sliding on the outer circumference of the. For this reason, it is possible to prevent the linear member 49 from being damaged by sliding, and even if the feeding amount of the linear member 49 becomes large, the hanging member 30 rotates around the connecting shaft 25 to form the linear member. Since the members 49 are sequentially fed out to the upper link member 35 side, a large tension does not act on the line members 49, and damage to the line members 49 due to excessive tension can be prevented. Then, when the work table 39 moves to a desired position, the worker performs work at a high place.

Next, when performing an aerial work at another work site above the work place where the work has been completed, the operator operates the boom operating device 47 shown in FIG. The work table 39 is moved to another work site as shown in FIG. 5A by extending the parallel link mechanism 17 by operating the extension 41 to swing upward. At this time, the linear member 49 connected to the upper link member 35 shown in FIG.
Is pushed back in the direction of. The linear member 49 pushed back
Since the tension becomes small, the hanging member 30 elastically expands radially outward in a state where the line member 49 is in close contact with the hanging member 30, and the line member 49 is turned toward the hanging member 30. It is returned and the linear member 49
The rotation member 30 rotates in accordance with the amount of rewinding. At this time, since the frictional force acts between the line-shaped member 49 and the hanging member 30, the line-shaped member 49 almost does not slide on the outer periphery of the hanging member 30. For this reason,
Damage due to sliding of the line-shaped member 49 can be prevented. When the amount of pushing back of the line-shaped member 49 is further increased and the hanging member 30 is in the state of maximum expansion, the line-shaped member 49 is separated from the hanging member 30 and loosened, but the parallel link is loosened. The slack of the linear member 49 can be reduced by setting the inner diameter d1 of the hanging member 30 in consideration of the amount of extension and retraction of the linear member 49 corresponding to the maximum swing angle of the mechanism 17 in the vertical direction. In addition, the linear member 49 can be disposed around the connecting shaft 25 in a compact manner.

[0027]

As described above, according to the apparatus for hanging a linear member of the present invention, the shaft formed on the substrate is formed into a cylindrical shape rotatably fitted to the shaft radially outside. A hanging member that is stretchable and contractible in the radial direction, and a line-shaped member that is arranged to be wound around the circumference of the hanging member at least one round, so that when the line-shaped member is fed out, a line-shaped member is formed. The member is in close contact with the outer periphery of the hanging member, and the hanging member is elastically reduced in the radial direction by the line-shaped member, and the hanging member is rotated according to the feeding amount of the line-shaped member. It almost never slides on the turning member. For this reason, damage due to sliding of the linear member can be prevented. Further, even if the feeding amount of the line-shaped member becomes large, the hanging member rotates around the axis, so that a large tension does not act on the line-shaped member, and damage due to excessive tension can be prevented. Even if the rewinding amount becomes large, the hanging member rotates on the axis according to the returning amount of the line-shaped member, so that the line-shaped member can be returned without sliding, and the hanging member has a diameter. By expanding outward in the direction, the slack of the line-shaped member around the axis is reduced, and the member can be arranged compactly around the axis.

Further, the inner diameter of the hanging member is larger than the outer diameter of the shaft, and the hanging member elastically contracts and expands in accordance with the extension of the linear member, so that the substrate can be moved at least up and down on the vehicle body. A boom bracket pivotally connected to the end of the provided boom so that it can swing freely, one end of the line-shaped member is connected to the boom, and the other end of the line-shaped member is vertically swung to the end of the boom bracket. When connected to a possible arm member, and the linear member connected to the arm member is extended and returned in accordance with the vertical swing of the arm member, the arm member swings vertically. When the line-shaped member is extended or returned, the hanging member elastically contracts or expands in the radial direction by the line-shaped member, and rotates in accordance with the extension amount of the line-shaped member. For this reason, since the line-shaped member hardly slides on the outer periphery of the hanging member, damage due to sliding can be prevented, and even when the swing angle of the arm member is large, the hanging member can be used. Since the rotation is made around the axis, a large tension does not act on the line-shaped member, and damage due to excessive tension can be prevented. In addition, even if the rewinding amount of the line-shaped member increases, the hanging member expands radially outward to reduce the slack of the line-shaped member around the axis and arrange the line-shaped member compactly around the axis. can do.

Further, when the hanging member is formed by spirally winding a thin plate having elasticity and is detachable from the shaft, the hanging member is fitted to the outer periphery of the shaft. The hanging member can be attached around the shaft, and the hanging member is formed by spirally winding a thin plate having elasticity, so that it can be easily attached to and detached from the shaft.

[Brief description of the drawings]

FIG. 1 is a rear side view of an aerial work vehicle equipped with a line-shaped member hanging device according to an embodiment of the present invention.

FIG. 2 is a plan view of the line-shaped member hanging device according to the embodiment of the present invention.

FIG. 3 is a perspective view of a hanging member according to the embodiment of the present invention.

FIGS. 4A and 4B are diagrams for explaining the operation of the device for hanging a linear member in one embodiment of the present invention, wherein FIG. 4A is a front view of a bending and stretching boom, and FIG. It is a fragmentary sectional view of a part.

FIGS. 5A and 5B are diagrams for explaining the operation of the line-shaped member wrapping device according to the embodiment of the present invention. FIG. 5A is a front view of a bending and stretching boom, and FIG. It is a fragmentary sectional view of a part. 1 is a perspective view of an aerial work vehicle in one embodiment of the present invention.

[Explanation of symbols]

 9 Telescopic boom (boom) 15 Boom bracket 23 Substrate 25 Connecting shaft (axis) 30 Hanging member 31 Plate 35 Upper link member (arm member) 37 Lower link member (arm member) 49 Line member 51 Line member hanging device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masato Ogawa 1152 Yamashita, Ryoji, Ryoji, Ageo City, Saitama Prefecture Inside Aichi Corporation Ageo Works (72) Inventor Masanobu Saito 1152, Ryoke, Ryuji, Ryoke, Ageo City, Saitama Prefecture No.10 Aichi Corporation Ageo Works Co., Ltd. (72) Inventor Motoaki Suda 1152 Yamashita, Ryoke, Oji-shi, Saitama F-term (reference) 3F333 AA08 AB04 AC01 BA12 BB09 BB23 BD02 BE02 CB03 CB11 CB12 CB15 CB16

Claims (3)

[Claims] 1. A substrate, a shaft protruding from the substrate, and a hanging member formed into a cylindrical shape rotatably fitted radially outward of the shaft and capable of expanding and contracting in the radial direction, And a line-shaped member disposed around at least one round on the outer periphery of the looping member. 2. An inner diameter of the hanging member is larger than an outer diameter of the shaft, and the hanging member elastically contracts and expands in accordance with extension of the linear member, and the substrate is mounted on the vehicle body. A boom bracket pivotally connected to at least a tip end of a boom provided to be able to move up and down, wherein one end of the linear member is connected to the boom, and the other end of the linear member is the boom bracket. The linear member connected to the arm member is fed out and returned in accordance with the vertical swing of the arm member, which is connected to the tip of the arm. The apparatus for hanging a linear member according to claim 1. 3. The apparatus according to claim 1, wherein the hanging member is formed by spirally winding a thin plate having elasticity and is detachable from the shaft.