JP2004091102A - Vehicle for high lift work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a convenient vehicle for high lift work that can sufficiently ensure a length of a boom and a folding arm and a size of a work platform. <P>SOLUTION: The vehicle for high lift work 1 has a revolving base 11 mounted for revolving motion, a lower boom disposed for telescopic and derricking motion on the revolving base 11, an upper boom 21 disposed for telescopic and folding motion at a tip of the lower boom, the folding arm 27 disposed for vertical swing motion at a tip of the upper boom 21, the work platform 40 disposed for vertical swing motion at a tip of the folding arm 27, and a vertical post 31 level-controlled to hold the work platform 40 horizontal. The work platform 40 has a holding member 41 held in vertical extension on the vertical post 31, and a body member 43 mounted for vertical swing motion on the holding member 41 and constituting a part that an operator boards; and is stored when the body member 43 is swung toward the holding member 41 so as to cover the holding member 41 and extend vertically along the folding arm 27. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an aerial work vehicle, and more particularly, to an aerial work vehicle configured by attaching a work table to a distal end portion of a bending and extending boom.
[0002]
[Prior art]
Some aerial work vehicles that perform aerial work have a bending / extending boom composed of a lower boom, an upper boom, and a bending / extending arm. This aerial work platform is composed of a swivel base that is attached to the car body so that it can swing freely, a lower and upper boom that can be freely moved up and down, and a flexible boom that is attached to the tip of the lower boom so that it can flex and extend. An upper boom, a bending arm attached to the tip of the upper boom so as to swing vertically, a worktable attached to the tip of the bending arm so as to swing vertically, and a workbench And a leveling mechanism for holding horizontally regardless of the swing of the arm.
[0003]
And, in this aerial work platform, the lower boom extends forward and falls down on the vehicle body, the upper boom extends rearward and falls down so as to overlap the upper side of the lower boom, and the bending and extending arm extends downward from the tip of the upper boom. The worktable is positioned at the rearmost end of the vehicle body and stored on the vehicle body until it extends substantially vertically (vertically).
[0004]
[Problems to be solved by the invention]
By the way, as shown in FIG. 10, in order to store the lower boom, the upper boom, the bending / extending arm, and the worktable on the vehicle body so as not to protrude from the vehicle body, the length a of the boom and the bending / extending arm in the storage position in the longitudinal direction a It is necessary to provide a vehicle body having a total length c that is equal to or greater than the sum of the length b of the working table in the vehicle longitudinal direction.
[0005]
However, the total length c is predetermined, and in order to secure the length a of the lower, upper boom, and the bending arm in the longitudinal direction, the workbench is made smaller (that is, the length b of the work floor in the vehicle longitudinal direction is shortened). ) I have to do it. For this reason, the area of the work floor is reduced, and the load capacity of the work table cannot be increased, which causes a problem that the usability is reduced.
[0006]
Further, when trying to secure the size of the worktable (that is, the length b of the work floor in the longitudinal direction of the vehicle body), since the total length c is predetermined as described above, the length of the lower arm, the upper boom, and the length of the bending / extending arm is reduced. The length a in the direction must be shortened. For this reason, there is a problem that the work range of the work at a high place is narrowed and the work efficiency is reduced.
[0007]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a user-friendly high-altitude work vehicle that can sufficiently secure the length of a boom, a bending arm, and the size of a work table. .
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a vehicle body capable of traveling, a swivel that is slidably attached to the vehicle body, a boom that is attached to the swivel so as to be able to move up and down, and a tip of the boom. Bending / extending arm attached to be able to swing up and down, work table attached to the end of bending / extending arm so as to be able to swing up and down, and work table being swung up and down with respect to the bending / extension arm to hold horizontally The boom extends in the rearward direction of the vehicle body and falls down on the vehicle body, and is swung from the rear end of the boom until the bending and extending arm extends downward in a substantially vertical state. An aerial work vehicle configured to be positioned and stored on the vehicle body, wherein the workbench includes a holding member that is vertically extended and held by a leveling mechanism, and a vertical member with respect to the holding member. Swing freely And a main body member constituting a part on which an operator rides, the main body member is swung upward to cover the holding member, and is extended up and down along the bending arm to be stored. Have been.
[0009]
With this configuration, the length of the boom, the bending arm, and the size of the worktable can be sufficiently increased within a predetermined overall length without reducing the work range of the work at height and the area of the work floor. Therefore, an easy-to-use aerial work vehicle can be obtained.
[0010]
Further, in order to achieve the above object, the present invention provides a vehicle body capable of traveling, a swivel mounted on the vehicle body so as to be able to swing freely, a lower boom mounted at least on the swivel so as to be able to move up and down, and a lower boom. An upper boom that is attached to the tip of the upper boom so as to be able to swing at least vertically, a bending arm that is attached to the tip of the upper boom so that it can swing vertically, and a work table that is attached to the tip of the bending arm so that it can swing vertically. And a leveling mechanism (e.g., the vertical post 31, the second link member 33, and the leveling cylinder 35 in the present invention) for swinging the worktable up and down with respect to the bending / extending arm to keep the workbench horizontal. The upper boom extends rearward and falls down so as to overlap the upper side of the lower boom. A work platform that is swung until the bending arm extends downward in a substantially vertical state, and the work table is located at the rearmost end of the vehicle body and is stored on the vehicle body. A holding member that is vertically extended and held by a leveling mechanism, and a main body member that is attached to the holding member so as to be vertically swingable and that constitutes a portion on which an operator rides. It is configured so as to be swung upward to cover the holding member, and to be vertically extended and stored along the bending arm.
[0011]
With this configuration, the (bending and lowering) lower boom and upper boom, the length of the bending and extension arm, and the size of the worktable can be maintained within a predetermined overall length without reducing the work area and the floor area of work at height. As a result, it is possible to obtain a convenient work platform.
[0012]
The main body member is housed by pivoting the main body member upward about the pivot shaft provided on the side surface or the base end thereof to cover the holding member and extending vertically along the bending / extending arm. You may comprise so that it may be. With such a configuration, when the work table is retracted by swinging the main body member upward, the vehicle height can be kept low.
[0013]
Further, the main body member is formed with a concave notch that opens toward the holding member in a plan view, and holds the main body member by swinging upward about a pivot shaft provided in the notch. The notch covers the member and extends vertically along the bending arm, and is stored.The notch includes a handrail member provided at an outer peripheral edge partly cut away in the vehicle width direction so as not to overlap the holding member at the storage position. It may be provided. With such a configuration, it is possible to store the work table while keeping the height thereof low, and it is also possible to increase the size of the work floor.
[0014]
It is preferable that the revolving base is attached to the vehicle body via a sub-frame, and in the storage position, the lower end of the worktable extends below the upper surface of the sub-frame. With such a configuration, the area of the work floor can be increased, so that work efficiency can be improved.
[0015]
In the retracted position, the lower end of the bending and extending arm may extend below the upper surface of the subframe. With such a configuration, a workbench having a sufficient work area can be stored compactly.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The embodiment of the present invention shows an aspect of a high lift aerial work vehicle having a bending / extension type boom that is capable of turning and extending and retracting on a vehicle body. FIG. 1 shows a side view of the aerial work vehicle. FIG. 2A shows a side view of the worktable. In FIG. 2, a part of a handrail member 45 described later is omitted to simplify the description.
[0017]
As shown in FIG. 1, the aerial work vehicle 1 includes a driving cabin 3a in front of a vehicle body 3, front wheels 5 and rear wheels 7 in front, rear, left and right, front and rear ends of the vehicle body 3 on both sides of the vehicle body 3. An outrigger jack 9 projects outward between the front wheel 5 and the rear wheel 7 and stably supports the vehicle body 3.
[0018]
In the center of the rear part of the vehicle body 3, there is provided a swivel table 11 that projects upward and can freely rotate through a sub-frame 3b mounted on the vehicle body 3. A lower boom 15 having a telescopic structure and having a first telescopic cylinder 13 built therein is pivotally connected to the upper part of the swivel table 11 so as to be vertically swingable. A first up-and-down cylinder 17 is pivotably connected between the lower portions. For this reason, the lower boom 15 moves up and down by the expansion and contraction operation of the first telescopic cylinder 13.
[0019]
An upper boom 21 nested at the distal end of the lower boom 15 and having a second telescopic cylinder 19 built therein is pivotally connected to be able to swing vertically. On the left and right side walls at the distal end of the lower boom 15 and on the left and right side walls at the base of the upper boom 21, first link members 23 that can swing vertically are provided, respectively, and the distal ends of these first link members 23 are provided. They are swingably connected to each other. The bottom side of the second up-and-down cylinder 25 is vertically connected to both side walls of the upper boom 21 so as to be swingable, and the rod-side tip is swingably connected to the tip of the first link member 23 to which the rod is connected. Have been. For this reason, when the second up-and-down cylinder 25 is extended and retracted, the upper boom 21 is moved up and down with respect to the lower boom 15.
[0020]
A bending arm 27 extends downward from the distal end of the upper boom 21 and is pivotally connected to be vertically swingable. A swing cylinder 29 is built in a tip end of the upper boom 21, and a tip end on a rod side thereof is swingably connected to a base of the bending / extending arm 27. By extending and retracting the swing cylinder 29, the position of the worktable 40 attached to the distal end of the bending and stretching arm 27 via the vertical post 31 can be adjusted in the vertical direction.
[0021]
As shown in FIG. 2 (a), a second link member 33 which is vertically swingable is provided at the distal end of the bending and stretching arm 27 and the base of the vertical post 31, respectively. The tip portions of 33 are swingably connected to each other. The bottom side of the leveling cylinder 35 is vertically connected to the tip of the upper boom 21 so as to swing freely, and the tip of the rod side is swingably connected to the tip of the second link member 33 to which it is connected. I have. Therefore, when the leveling cylinder 35 is extended and retracted, the bending and extending arm 27 is raised and lowered with respect to the upper boom 21 so that the vertical post 31 can always be maintained vertically. As a result, the floor surface of the worktable 40 slidably (horizontally rotatable) provided at the tip of the vertical post 31 is moved to the lower boom 15 and the upper boom 21 (hereinafter, these are collectively referred to as “boom 22”). ), And regardless of the operation of the bending and stretching arm 27, it can always be held horizontally.
[0022]
Now, the work platform 40 is mounted on the aerial work vehicle 1 configured as described above, as shown in FIGS. As described above, FIG. 2A shows a state in which an operator can board the work table 40 (hereinafter, referred to as an “unfolded state”), and FIG. It is shown.
[0023]
The workbench 40 extends vertically from the vertical post 31 and is held swingably (horizontally swingable), and vertically with respect to the holding member 41 about a pivot shaft 43m provided on the side surface as a center of rotation. A main body member 43 which is pivotably connected in the direction and which constitutes a portion on which an operator rides, and a handrail member 45 provided on an outer peripheral edge of the main body member 43 to extend upward. In FIG. 2, a part of the handrail member 45 in the front-rear direction of the vehicle body is omitted), a bottom side is attached to a lower end of the holding member 41, and a tip end on the rod side is swingably connected to a side surface of the main body member 43. It comprises a worktable cylinder 47 and a first operation device 49 attached to the upper part of the handrail member 45 to operate the boom 22, the extension / retraction arm 27, and the operation of the swivel table 11. With such a configuration, when the work table cylinder 47 is extended and contracted, the main body member 43 can be vertically swung with respect to the holding member 41.
[0024]
Next, the operation of the aerial work vehicle 1 of the present invention will be described. First, the aerial work vehicle 1 is driven and moved to the lower periphery of the work site with the boom 22 and the work table 40 stored in the vehicle body 3 shown in FIG. 1, and then the outrigger jack 9 is extended outward. The vehicle body 3 is stably supported. At this time, as shown in FIG. 2B, the work table 40 is in a stored state in which the main body member 43 and the handrail member 45 are stored in a state where the main body member 43 and the handrail member 45 are vertically extended along the bending and extending arm 27 and stored. Located on top. Then, the operator operates a second operating device (not shown) provided on the vehicle body 3 to contract the work table cylinder 47 to move the main body member 43 downward with respect to the holding member 41. By swinging, the work table 40 is deployed as shown in FIG.
[0025]
The operator gets on the work table 40 deployed in this way, operates the first operating device (not shown) provided on the work table 40 to raise and lower the lower boom 15 and the upper boom 21 and to perform the work. The table 40 can be swung with respect to the vertical post 31 to bring the work table 40 closer to the work site. At this time, the worktable 40 is always kept horizontal by a leveling mechanism (not shown). In addition, when the operator expands and contracts the swing cylinder 29, the work table 40 can be swung up and down to adjust the work position. Then, when the work table 40 moves to the work site, the worker performs work at a high place.
[0026]
When the work at a high place is completed, the worker on the work table 40 shown in FIG. 1 operates the first operating device (not shown) to swing the work table 40 with respect to the vertical post 31, and 15 and the upper boom 21 are reduced, the work table 40 is turned, and the boom 22 is moved above the vehicle body 3 and stopped. Then, the lower boom 15 is laid down and the upper boom 21 is laid down so that the upper boom 21 overlaps the lower boom 15 and the boom 22 is stored on the vehicle body 3.
[0027]
Then, after the worker on the work table 40 gets off the work table 40, the second operation device (not shown) provided on the vehicle body 3 is operated to extend the work table cylinder 47. Then, the main body member 43 is swung upward with respect to the holding member 41. Then, as shown in FIG. 2B, the work table 40 is stored on the vehicle body 3 in a storage state that covers the holding member 41 and extends vertically along the bending and extending arm 27.
[0028]
As described above, the main body member 43 of the worktable 40 can be extended up and down along the bending arm 27 and stored compactly on the vehicle body 3. As a result, the length of the boom 22, the length of the bending arm 27, and the size of the work table 40 can be sufficiently secured without reducing the work range of the work at a high place and the area of the work floor within a predetermined overall length. An easy-to-use aerial work vehicle can be obtained.
[0029]
Further, the main body member 43 is swung upward about a pivot shaft 43 m provided on the side surface of the main body member 43 of the work table 40 to cover the holding member 41 and extends vertically along the bending and stretching arm 27. By storing, the vehicle height at the time of storage can be further reduced.
[0030]
Although the embodiment of the present invention has been described above, the scope of the present invention is not limited to the above. For example, in the present embodiment, the aerial work vehicle 1 has a so-called bending-extension type boom in which the upper boom 21 is attached to the tip of the lower boom 15 so as to be able to bend and extend. May be used for an aerial work vehicle equipped with a so-called straight-extension boom.
[0031]
In addition, the aerial work vehicle of the present invention may have a work table as shown in FIGS. 3, 4, 5, and 6, or may have a storage posture as shown in FIGS. . These will be described below. In FIG. 3, a part of the handrail member 45 is omitted to simplify the description.
[0032]
As shown in FIG. 3, the mechanism for swinging the main body member 43 in the worktable 40 is such that a worktable cylinder 47 is vertically arranged along the holding member 41 and a link member L is attached to the rod-side tip. The main body member 43 may be configured to swing in combination. FIG. 3A shows the unfolded state of the work table 40, and FIG. 3B shows the stored state of the work table 40. As described above, the link member L is swingably provided on the side surface of the main body member 43 and the rod side of the worktable cylinder 47, and the distal ends of the first link members 23 are swingably connected to each other. I have.
[0033]
As shown in FIG. 4, in the worktable 40, instead of providing the rotation center (that is, the pivot shaft 43 m) on the side surface of the main body member 43 as described above, the rotation center P is provided at the base end of the main body member 43. It may be configured to be provided so as to be swingable vertically with respect to the holding member 41. FIGS. 4A and 4B show the unfolded state of the workbench 40, wherein FIG. 4A is a plan view and FIG. 4B is a side view. FIG. 4C is a side view showing the stored state of the work table 40. With such a configuration, the distance between the holding member 41 and the main body member 43 can be reduced in the stored state, so that the work table 40 can be stored compactly with the length in the vehicle longitudinal direction suppressed.
[0034]
As shown in FIGS. 5 and 6, in the worktable 40, the main body member 43 is formed in a concave shape in plan view, and the handrail member 45 is partially in the vehicle width direction so as not to overlap with the holding member 41 in the stored state. May be cut out. FIGS. 5A and 5B show the unfolded state of the worktable 40. FIG. 5A is a plan view and FIG. 5B is a side view. 6A and 6B show the stored state of the workbench 40. FIG. 6A is a front view of the workbench 40 viewed from the front of the vehicle body, FIG. 6B is a side view of the workbench 40, and FIG. Is a front view of the work table 40 as viewed from the rear of the vehicle body. With such a configuration, the work table 40 can be stored with a reduced height, and the work floor can be made larger.
[0035]
As shown in FIG. 7, in the worktable 40, even if the angle formed between the upper boom 21 and the bending / extending arm 27 has a predetermined angle α (for example, the angle when the boom 22 performs the maximum raising operation), it is compact. It is desirable to be configured to be able to store. 7A shows the stored state of the work table 40, and FIG. 7B shows the expanded state of the work table 40.
[0036]
In the storage position, as shown in FIG. 8, it is preferable that the lower end of the worktable 40 be disposed to extend below the upper surface (solid line A in the figure) of the sub-frame 3b. With such a configuration, the area of the work floor can be increased, so that work efficiency can be improved.
[0037]
In the retracted position, as shown in FIG. 9, the lower end of the bending and extending arm 27 may extend below the upper surface (solid line A ′ in the figure) of the sub-frame 3b. With such a configuration, the work table 40 having a sufficient work area can be stored more compactly.
[0038]
【The invention's effect】
As described above, according to the aerial work vehicle of the present invention, the workbench is attached to the holding member that is vertically extended and held by the leveling mechanism, and is swingable in the vertical direction with respect to the holding member. And a main body member constituting a portion on which an operator rides, the main body member is swung upward to cover the holding member, and is configured to be vertically extended and stored along the bending / extending arm. I have.
[0039]
With such a configuration, the length of the boom (straight extension type and bending extension type), the length of the bending extension arm, and the size of the work table can be maintained within a predetermined overall length without reducing the working range of the work at height and the area of the work floor. Can be obtained sufficiently, so that an easy-to-use aerial work vehicle can be obtained.
[0040]
[Brief description of the drawings]
FIG. 1 is a view showing a preferred embodiment of an aerial work vehicle according to the present invention.
FIGS. 2A and 2B are diagrams showing a preferred embodiment of a workbench in an aerial work vehicle according to the present invention, wherein FIG. 2A shows an expanded state of the workbench, and FIG. FIG.
3A and 3B are views showing a second embodiment of the workbench in the aerial work vehicle according to the present invention, wherein FIG. 3A shows the workbench 40 in an unfolded state, and FIG. FIG. 9 is an explanatory diagram showing a storage state of the storage device.
FIG. 4 is a plan view (a) and a side view (b) of a working platform in an aerial work platform according to a third embodiment of the present invention. FIG. 4C is a side view showing the stored state of the work table 40.
FIGS. 5A and 5B are diagrams showing a fourth embodiment of the workbench in the aerial work vehicle according to the present invention, and are a plan view (a) and a side view (b) showing a deployed state of the workbench, respectively.
FIGS. 6A and 6B are views showing a fourth embodiment of the workbench in the aerial work vehicle according to the present invention, wherein a front front view (a), a side view (b), and a rear front view showing the stored state of the workbench, respectively; (C).
FIGS. 7A and 7B are diagrams showing a fifth embodiment of the workbench in the aerial work vehicle according to the present invention, wherein FIG. 7A shows the stored state of the workbench 40, and FIG. It is explanatory drawing which shows the deployment state.
FIG. 8 is a diagram showing a preferred arrangement example of the work platform and the bending and stretching arms in the retracted posture in the aerial work vehicle according to the present invention.
FIG. 9 is a diagram showing another preferred arrangement example of the work platform and the bending and stretching arms in the retracted posture in the aerial work vehicle according to the present invention.
FIG. 10 is a view showing a conventional embodiment of an aerial work vehicle according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Aerial work platform 3 Body 3b Subframe 11 Swivel base 15 Lower boom 21 Upper boom 27 Bending and stretching arm 31 Vertical post (leveling mechanism)
33 2nd link member (leveling mechanism)
35 Leveling Cylinder (Leveling Mechanism)
40 work table 41 holding member 43 main body member 43m pivot shaft 45 handrail member 47 work table cylinder 49 first operating device

Claims (6)

A vehicle body capable of running, a swivel table attached to the vehicle body so as to swing freely, a boom attached to the swivel table so as to be able to move up and down at least, and a swingable vertically attached to a tip of the boom. A bending and stretching arm, a worktable attached to the tip of the bending and stretching arm so as to be swingable in a vertical direction, and a leveling mechanism for horizontally swinging the worktable vertically with respect to the bending and stretching arm and holding the worktable,
The boom extends in the rearward direction of the vehicle body and falls down on the vehicle body, and is swung from the rear end of the boom until the bending / extending arm extends substantially vertically downward, and the work table is located at the rearmost end of the vehicle body. An aerial work vehicle configured to be stored on the vehicle body,
The work table includes a holding member that is vertically extended and held by the leveling mechanism, and a main body member that is attached to the holding member so as to be vertically swingable and that constitutes a portion on which an operator rides. Have
The aerial work vehicle, wherein the body member is swung upward to cover the holding member, and is vertically extended and stored along the bending arm. A vehicle body capable of running, a swivel table slidably mounted on the vehicle body, a lower boom mounted at least on the swivel table so as to be able to move up and down, and an upper boom mounted at least at a tip of the lower boom so as to be able to bend and extend freely A bending / extension arm attached to the tip of the upper boom so as to be swingable in the vertical direction, a worktable attached to the tip of the bending / extension arm to be swingable in the up / down direction, and the worktable attached to the bending / extension arm. With a leveling mechanism that swings up and down to hold it horizontally,
The lower boom extends in the forward direction of the vehicle body and falls down on the vehicle body, the upper boom extends in the rearward direction of the vehicle body and falls down so as to overlap the upper side of the lower boom, and the bending arm extends downward from the tip of the upper boom. Rocking until it extends in a vertical state, wherein the work platform is located at a rearmost end of the vehicle body and is configured to be stored on the vehicle body,
The work table includes a holding member that is vertically extended and held by the leveling mechanism, and a main body member that is attached to the holding member so as to be vertically swingable and that constitutes a portion on which an operator rides. Have
The aerial work vehicle, wherein the body member is swung upward to cover the holding member, and is vertically extended and stored along the bending arm. The main body member swings upward about the pivot shaft provided on the side surface or the base end thereof to cover the holding member and extends vertically along the bending and extending arm while covering the holding member. The aerial work vehicle according to claim 1, wherein the work vehicle is stored. The main body member is formed with a concave notch that opens toward the holding member in a plan view, and swings the main body member upward about a pivot shaft provided in the notch as a center of rotation. While covering the holding member and extending up and down along the bending arm and retracted,
The said notch part is provided with the handrail member provided in the outer peripheral edge part which cut | disconnected one part in the vehicle width direction so that it might not overlap with the said holding member in a storage position, The Claim 1 or 2 characterized by the above-mentioned. The aerial work vehicle described. The swivel is attached to the vehicle body via a sub-frame,
The aerial work vehicle according to any one of claims 1 to 4, wherein a lower end portion of the worktable extends below the upper surface of the subframe in the storage posture. The aerial work vehicle according to claim 5, wherein, in the retracted position, the lower end of the bending and extending arm extends below the upper surface of the subframe.

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