JPH074492U - Lifting device for self-propelled aerial work platforms - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] It is possible to easily and easily hang the aircraft in a substantially horizontal state without the need for a wire rope or the like. A self-propelled aerial work vehicle having a chassis 3 having a traveling device 2 and a work table 5 provided on the chassis 3 via an elevating mechanism 4 so as to be located below the work table 5. On the side of the machine body or the workbench 5 of the vehicle, a fixing metal fitting 27 whose base end is rotatably connected is provided.
The fixing pin 29 provided on the side of the fixing pin 29 is detachably provided.
Fixing device 2 that is locked to
5, a hanging hook 20 fixed to the machine body on the vertical line of the center of gravity of the machine and below the floor surface of the work table 5, and a door on a part of the floor surface of the work table 5 above the hanging hook 20. Two
And an opening 22 formed so as to be openable and closable through the opening 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a suspension device for a self-propelled aerial work vehicle used for aerial work such as ceiling construction, wiring, piping or painting at a construction site.

[0002]

[Prior art]

 Conventionally, rolling towers and scaffolds have been assembled for high-place work such as ceiling construction, wiring, piping work, lighting installation work, and painting work at construction sites, but recently labor saving and safety has been done. In order to improve the vehicle, a self-propelled aerial work vehicle is often used in which a work platform that can move up and down is provided on a chassis having a traveling device.

By the way, when such a self-propelled aerial work vehicle is carried in and out of a construction site, it is generally loaded on a truck and carried. The loading and unloading of the truck can be done by self-propelled using a step board, but usually it is done by lifting with a crane or the like.

For this reason, conventionally, in this type of aerial work vehicle, for example, as shown in FIGS. 9 and 10, a suspension metal fitting 103 as a suspension device is provided in the square portion of the chassis 102 to suspend the machine body 101. At this time, the wire rope 104 is hung on the hanging metal fitting 103 as shown in FIGS. 9 and 10, and the central portion thereof is hooked on a hook 105 of a crane or the like to be lifted.

[0005]

[Problems to be solved by the device]

 However, in the conventional lifting device as described above, the wire rope 104 or the like is required during the lifting work, and the wire rope 104 or the like is hung on the four hanging fittings 103, and the substantially central portion thereof is hooked by a hook 105 such as a crane. Since the machine body 101 has to be hung on the ground and hoisted so that the machine body 101 is in a substantially horizontal state, the work is complicated and troublesome, and it is difficult for one person to operate.

Further, when the wire rope 104 is hung, the portion where the wire rope 104 hits the body 101 in order to prevent damage such as painting of the body 101 (for example, the workbench 106 and the handrail portion 107 in FIG. 9). The corrugated cardboard, waste cloth, etc. must be sandwiched between the worktable 106 (in FIG. 10, etc.), and the work becomes even more complicated.

Further, when the wire rope 104 is lifted, the hooked portion of the wire rope 104 with respect to the hook 105 may shift and the machine body 101 may tilt. In this case, the machine body 101 becomes unstable and dangerous.

[0008] Therefore, an object of the present invention is to provide a hoisting device for a self-propelled aerial work vehicle that does not require a wire rope or the like and can easily and easily hoist the machine body in a substantially horizontal state. .

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention relates to a self-propelled aerial work vehicle having a chassis having a traveling device and a work platform provided on the chassis so as to be capable of moving up and down through a lifting mechanism. Provided on the machine body or workbench side below the platform is a fixing bracket whose base end is rotatably connected, and the tip of this fixing bracket is detachably attached to a fixing pin provided on the chassis side. A fixing device that restricts the extension of the lifting mechanism by locking the fixing bracket to the fixing pin at the lowest position, and is fixed to the machine body on the vertical line of the center of gravity of the machine and below the floor surface of the workbench. It is characterized in that it is provided with a hanging hook and an opening formed in a part of the work table floor above the hanging hook so as to be openable and closable through a door.

[0010]

[Action]

 According to the above configuration, when hoisting the machine body, first of all, the lifting mechanism is fixed by the fixing device, the door on the floor of the workbench is opened, and the hanging hook is seen through the opening. You can carry out the lifting operation with a simple operation just by hooking the hook.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a descending state of a self-propelled aerial work vehicle equipped with a suspension device according to an embodiment of the present invention, and FIG. 2 is a front view thereof.

This self-propelled aerial work vehicle 1 is configured by providing a work table 5 that is moved up and down via a lift mechanism 4 composed of a pantograph type link mechanism on a chassis 3 having a crawler type traveling device 2. .

The elevating mechanism 4 is a combination of a pair of left and right links 8 consisting of a pair of link arms 6 and 7 pivotally attached in an X shape, and is extendably and contractibly connected at upper and lower ends in a plurality of stages. The lower end of one of the lower link arms 6 is pivotally attached to the front end of the chassis 3, and the lower end of the other lowermost link arm 7 is slidably supported on the rear part of the chassis 3 in the front-rear direction. The upper end of one of the uppermost link arms 6 is slidably supported by the rear portion of the workbench 5 in the front-rear direction, and the upper end of the other uppermost link arm 7 is pivotally attached to the front end of the workbench 5. Has been done.

Further, the lifting mechanism 4 is provided with hydraulic cylinder mechanisms 9 and 10 for expanding and contracting the links 8 pivotally connected in a plurality of upper and lower stages. The hydraulic cylinder mechanism 9 is disposed between the lowermost link 8 and the link 8 that is one stage above the lowermost link 8, and the cylinder 11 is pivotally attached to the connecting member 12 that is installed between the link arms 6 of the lowermost link 8. A piston rod 13 is pivotally attached to a connecting member 14 installed between the link arms 6 of the uppermost link 8. The hydraulic cylinder 10 is arranged between the uppermost link 8 and the link 8 one below it, and the piston rod 15 is pivotally attached to a connecting member 16 installed between the link arms 7 of the uppermost link 8 to form a cylinder. 17 is pivotally attached to a connecting member 18 which is installed between the link arms 7 of the lower link 8.

Then, the lifting mechanism 4 expands and contracts by the operation of the hydraulic cylinder mechanisms 9 and 10, and the workbench 5 moves up and down while maintaining a horizontal state.

A suspension hook 20 arranged on a vertical line of the center of gravity G of the machine is attached to the central connecting member 19 of the uppermost link 8 of the elevating mechanism 4. At the upper end of the hanging hook 20, a hooking portion 21 for hooking on a hook 105 of a crane or the like is formed, and the hooking portion 21 is located below the floor surface 5a of the workbench 5.

Further, an opening 22 through which the hanging hook 20 is seen is formed on the floor surface 5 a of the workbench 5, and a door 23 is provided in the opening 22 via a hinge 24 so as to be openable and closable. There is. Then, when the door 23 is closed, it forms the same plane as the floor surface 5a.

Further, the hinge 24 is provided with a fulcrum crossing mechanism, and when the hinge 24 crosses the fulcrum, it urges the door 23 toward either the closing side or the opening side.

On the other hand, the machine body 1 is provided with a fixing device 25 for restricting the extension of the elevating mechanism 4 when the workbench 5 is at the lowest position.

As shown in FIG. 4, the fixing device 25 is composed of a pair of left and right fixing fittings 27 for connecting and fixing the pivot shafts 26 of the uppermost pair of left and right links 8 and the chassis 1 to each other. Has its base end rotatably and axially movably supported by support portions 28 extending to the left and right ends of the pivot shaft 26 of the link 8, and its front end is provided on both left and right sides of the chassis 1. It has an engaging hole 30 that can be fitted into and removed from the fixed pin 29 that is mounted.

Each fixing member 27 is urged toward the inside of the machine body by a spring 32 interposed between the fixing member 27 and a spring sheet 31 provided at the shaft end of the support portion 28.

Further, the fixing pin 29 provided on the chassis 1 is arranged on the descent line of the axis of the supporting portion 28 and is projected from a bracket 33 fixedly mounted on the chassis 1.

The other link arm 7 of the uppermost link 8 is provided with a receiving pin 34 for locking the fixing member 27 when not in use.

The workbench 5 is provided with a handrail 35.

Next, the operation of the above embodiment will be described.

When the machine body is used for ceiling work, wiring, piping work, etc. at a construction site, the elevating mechanism 4 is extended and the workbench 5 is raised as shown in FIG. 5, but at this time, it is fixed. The fixing metal fitting 27 of the device 25 is placed so that the engaging hole 30 at the tip end thereof is engaged with the receiving pin 34 so as to be attached along the length of the link arm 7.

The door 23 on the floor surface 5a of the workbench 5 is closed and forms the same plane as the floor surface 5a.

When the machine body is loaded onto a truck or the like and then unloaded, when the machine body is hoisted by a crane or the like, first, as shown in FIG. The elevating mechanism 4 is fixed so as not to extend by the fixing device 25 in the lowered position.

Specifically, the fixing metal fitting 27 is grasped by a hand and moved to the outside of the machine body against the biasing force of the spring 32, and the engaging hole 30 at the tip end thereof is removed from the receiving pin 34. In this state, the engaging hole 30 is engaged with the fixing pin 29 by rotating downward.

When the hand is released, the fixing bracket 27 is urged toward the inside of the machine by the urging force of the spring 32, and the pivot shafts 26 of the uppermost pair of left and right links 8 and the chassis 1 are connected and fixed. .

Next, the door 23 on the floor surface 5 a of the workbench 5 is opened and the hanging hook 20 is seen through the opening 22.

Then, a hook 105 such as a crane is hooked on the hooking portion 21 of the hanging hook 20 and lifted.

At this time, since the suspension hook 20 is disposed on the vertical line of the center of gravity G of the machine body, the machine body is suspended at the center of gravity position. Therefore, the aircraft can be hung in a substantially horizontal state.

6 to 8 show another embodiment of the present invention. In addition, the same components as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the duplicated description is omitted.

In this embodiment, the hanging hook 20 arranged on the vertical line of the body weight center G is fixed to the connecting member 37 which is erected on the support frame 36 of the workbench 5.

Further, the base end portion of the fixing metal fitting 27 of the fixing device 25 is connected to the workbench 5. That is, the bracket 38 is fixedly installed on the workbench 5, the support pin 39 is projected on the bracket 38, and the base end portion of the fixing bracket 27 is rotatable and axially movable on the support pin 39. To support.

Further, the receiving pin 34 is provided on the flange 41 fixed to the workbench 5.

Then, when the workbench 5 is at the lowest position, the workbench 5 and the chassis 1 are connected and fixed by the fixing metal fitting 27.

According to this embodiment, the same effect as that of the above embodiment can be obtained, and the rigidity can be further increased.

It is needless to say that the present invention is not limited to the above-described embodiment, and can be applied to, for example, an elevating mechanism having a sigma (Σ) type.

[0042]

[Effect of device]

 As is clear from the above description, according to the configuration of the present invention, it is possible to simply open the door on the floor of the workbench after fixing the elevating mechanism with the fixing device without separately needing the wire rope. The aircraft can be lifted by operation. Moreover, since the aircraft is hoisted at a substantially center of gravity position, the aircraft can be hoisted in a substantially horizontal state, and the aircraft does not tilt, so that the hoisting work can be performed safely, and no wire rope is used. Therefore, it does not damage the aircraft.

[Brief description of drawings]

FIG. 1 is a side view of a self-propelled aerial work vehicle equipped with a suspension device according to an embodiment of the present invention.

FIG. 2 is a front view of a self-propelled aerial work vehicle according to an embodiment of the present invention.

FIG. 3 is a perspective view showing an example of a hook and a door.

FIG. 4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 is a side view showing a raised state of a workbench of a self-propelled aerial work vehicle according to an embodiment of the present invention.

FIG. 6 is a side view showing another embodiment of the present invention.

FIG. 7 is a side view showing another embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along the line BB in FIG.

FIG. 9 is an explanatory diagram of a suspension device according to a conventional example.

FIG. 10 is an explanatory diagram of a suspension device according to a conventional example.

[Explanation of symbols]

 1 ... Self-propelled aerial work vehicle (machine) 2 ... Traveling device 3 ... Chassis 4 ... Lifting mechanism 5 ... Work table 5a ... Floor surface 8 ... Link 20 ... Hanging hook 22 ... Opening 23 ... Door 25 ... Fixing device 27 ... Fixing metal fitting 28 ... Supporting part 29 ... Fixing pin 34 ... Receiving pin

Claims (1)

[Scope of utility model registration request] 1. A self-propelled aerial work vehicle having a chassis having a traveling device, and a work platform provided on the chassis so as to be able to move up and down through an elevating mechanism. A fixing bracket having a base end rotatably connected to the base side is provided, and a tip end of the fixing bracket is detachably attached to a fixing pin provided on the chassis side. A fixing device for locking the extension mechanism of the lifting mechanism by locking it to the fixing pin, a suspension hook fixed to the machine body on a vertical line of the machine center of gravity and below the floor surface of the work table, and the suspension hook. A suspending device for a self-propelled aerial work vehicle, comprising: an opening formed in a part of a floor surface of a work table above a hook so as to be openable and closable through a door.