JP2681574B2 - Aerial work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle, and more particularly, to an aerial work vehicle for use in ceiling work at a construction site, which facilitates the construction of long objects such as air conditioning ducts. Regarding aerial work vehicles that can be performed.

[0002]

2. Description of the Related Art Conventionally, an aerial work vehicle has been used for ceiling work in construction work, for example, piping work for air conditioning ducts,
The operator was placed on a worktable that can be raised and lowered and lifted to the work position.

[0003]

However, although the above-described work vehicle for aerial work can easily raise the worker to the work position, it cannot raise a long object such as an air conditioning duct to the work position. There wasn't. For this reason, when lifting a long object, build a scaffold and lift it manually to the construction position, or use two high-altitude work vehicles and hang a long pipe etc. At the same time, it was raised and lifted. Further, even with an article that can be lifted to a construction site by one high-altitude work vehicle, it takes time and effort to lift the article onto the worktable. Therefore, the work efficiency was poor and many workers were required.

Therefore, the present invention provides an aerial work vehicle equipped with a long object lift mechanism capable of easily lifting a long object such as an air-conditioning duct and greatly improving the work efficiency of piping work and the like. Is intended.

[0005]

In order to achieve the above-mentioned object, an aerial work vehicle of the present invention is an aerial work vehicle having a work platform that can be lifted and lowered on the upper part of a base, and both sides of the base are provided. A pair of rotating arms that are rotatably provided in the vertical direction and that rotate integrally, a fork that is rotatably provided at the distal ends of both rotating arms, and a rotation of the rotating arms. A fixed sprocket provided coaxially with the center and fixed to the base, a rotary sprocket coaxially provided with the center of rotation of the both forks and integrally rotatable with the forks, and a sprocket suspended between both sprockets. A roller chain is provided, and the rotation arm has a length and a rotation angle capable of rotating the fork from a position near the floor surface on the side of the base to a position above the work table. It has a feature.

[0006]

[Operation] In the aerial work vehicle with the above configuration, the turning arm is turned to a lowered position near the floor surface, and a long object such as a pipe is placed on the fork at the tip of the abutting arm. When the arm is rotated upward, the fork at the tip of the rotating arm is raised by the action of both sprockets and the roller chain while keeping the posture angle constant, and the long object is raised to a predetermined position above the workbench. .

[0007]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of an aerial work vehicle of the present invention. FIG. 1 is a side view of the aerial work vehicle, and FIG. 2 is a front view of the same.

The work vehicle 1 for aerial work is provided with a work table 4 which is moved up and down by a scissor link mechanism 3 on an upper part of a movable base 2 and a long object lift mechanism 5. The long object lift mechanism 5 includes an arm 11 rotatably provided on an upper portion of a case 10 fixed to both ends of a base 2, and a fork 20 rotatably provided on a tip of the arm 11. It consists of and.

The arm 11 includes a first sprocket 13 driven by a hydraulic cylinder 12, a second sprocket 14 fixed to the base of the arm 11, and a roller chain 15 suspended between the sprockets 13, 14. Is operated by the rod 12 of the hydraulic cylinder 12.
When the fork 20 is retracted, the fork 20 can be turned down to near the floor,
The fork 20 is formed so as to be able to pivot and rise above the work table 4 when the 2a is extended. The first sprockets 13 on both sides are connected by a shaft 16 that penetrates through the base 2 and are formed so as to rotate integrally, so that the elevation angle of the arm 11 is kept the same.

The fork 20 rotates about a shaft 21 at the tip of the arm.
The rotation angle of the sprocket 22 is a rotation sprocket 22 that rotates integrally with the shaft 21, a fixed sprocket 23 provided coaxially with the rotation center of the arm 11, and both sprockets 22 and 2.
It is regulated by the roller chain 24 that is stretched between the three.

The fixed sprocket 23 is the fork 2
The fixed sprocket 23 has the same diameter as the rotating sprocket 22 on the 0 side fixed to the side surface of the case 10.
And the roller chain 24 and the rotating sprocket 22
Acts like a parallel link, and moves the fork 20 up and down with respect to the rotation of the arm 11 while keeping its attitude angle constant.

The roller chain 24 stretched between the sprockets 22 and 23 is longer than a normal length and is loosened between both sprockets, and the tension side 24a of the roller chain 24 is used.
And a tension roller 31 as an adjusting means provided on the loose side 24b so that the tension of the roller chain 24 can be adjusted and the attitude angle of the fork 20 can be changed. doing.

As shown in FIG. 3, the pushing roller 30 is connected to a hydraulic cylinder 33 via a link lever 32, and the tension roller 31 is connected to a spring 35 via a link lever 34. There is.
That is, when the hydraulic cylinder 33 is operated to push the push-in roller 30 into the tension side 24a of the roller chain 24, the fixed sprocket 23 is fixed, so that the rotary sprocket 22 corresponds to the push-in amount of the roller chain 24. And rotates in the direction of the tension side 24a, whereby the tip end side of the fork 20 rises. Hydraulic cylinder 33
Is operated in the reverse direction, the tension roller 31 pushes the loose side 24b of the roller chain 24 by the action of the spring 35 of the adjusting means, and the rotating sprocket 22
Rotates in the opposite direction and the tip side of the fork 20 lowers.

Therefore, the posture of the fork 20 can be changed only by operating the hydraulic cylinder 33, and the article on the fork 20 can be securely held. The length of the roller chain 24 can be adjusted by a turnbuckle 36 provided in the middle of the chain.

The long object lift mechanism 5 configured as described above.
When constructing a long object, for example, an air conditioning duct P using the aerial work vehicle 1 equipped with, the arm 11 is first rotated to the lowermost position to position the fork 20 near the floor,
The air conditioning duct P is placed on the fork 20. Next, the hydraulic cylinder 33 of the chain pushing means is operated to operate the fork 2
0 is raised to prevent the air conditioning duct P from rolling down. Thereafter, the rod 12a of the hydraulic cylinder 12 is extended, and the first sprocket 13, the roller chain 1
5, the arm 11 is rotated upward via the second sprocket 14, and the fork 20 is positioned above the worktable 4. Thereby, the air-conditioning duct P can be lifted above the workbench 4.

In the aerial work vehicle 1 according to this embodiment, in addition to the long object lift mechanism 5, the long object lifted above the work table 4 as described above is further moved upward. It is provided with a long object lifting and holding device 50 that can be lifted up and installed at a construction position.

The long object lifting and lowering device 50 includes a work table 4
Guide column 51 erected vertically on the floor surface of the vehicle, and an elevating member 52 slid up and down guided by the guide column 51.
A long object holder 53 supported by the elevating member 52;
Hydraulic cylinder 5 for raising and lowering the long object holding table 53
4 and the long object holding table 53 includes:
A mechanism (holding adjustment mechanism) for securely holding the long object and adjusting the position of the held long object is provided.

As shown in FIGS. 4 and 5, the holding and adjusting mechanism of the long object has a pair of guide rails provided at the upper end of the elevating member 52 in the horizontal direction orthogonal to the axis of the long object. 55, and a slide table 56 slidably provided on the guide rail 55 along the guide rail 55.
And a shaft 56 erected in the center of the slide table 56.
The rotating beam 57 rotatably fitted to a and the lower side of a long object provided at both ends of the rotating beam 57 are supported by two inclined rollers 58a arranged in a V shape. The roller unit 58 includes a pair of roller units 58, and a pressing unit 59 that is provided in the center of the rotating beam 57 so as to be capable of undulating and presses the upper side of the long object.

A brake device 60 for regulating the movement of the slide table 56 is provided between the guide rail 55 and the slide table 56, and between the slide table 56 and the turning beam 57. A brake device 61 for restricting rotation of the rotation beam 57 is provided. Further, in the pair of roller units 58, the support bolt 63a of the arm 62 provided with the roller unit 58 is rotated by the handle 63b to push up the roller unit 58, thereby adjusting the inclination angle of the long object. A tilt angle adjusting device 63 is provided.

The holding unit 59 rotates about a shaft 65 of a bracket 64 protruding from the turning beam 57. When the holding unit 59 is raised to a long object holding position, its rotation is performed by a lock pin 66. Be regulated. The shaft 65
A shaft 68 is attached to the tip of a rotating arm 67 that rotates about
The presser arm 69 is swingably provided by the
Presser roller 7 for holding the upper side of the long object at the tip of
0 is provided. An up / down adjustment mechanism 71 is provided between the other end of the holding arm 69 and the tip end of the rotating arm 67 to make the holding roller 70 contact the upper side of the long object.

At least one of the tilt roller 58a and the pressing roller 70 is
A brake device is provided for restricting the rotation of the roller and preventing the movement of the long object.

Therefore, as described above, the air conditioning duct P lifted above the work table 4 by the fork 20 of the long object lift mechanism 5 is placed on the roller unit 58 with the pressing unit 59 in a tilted state. Next, after raising the pressing unit 59 and fixing it with the lock pin 66, the handle 71a of the vertical adjustment mechanism 71 is turned to press the upper surface of the air conditioning duct P with the pressing roller 70, and the air conditioning duct P
Is held between the pair of roller units 58 and the pressing roller 70. At this time, the slide table 5
6. The rotating beam 57 and the roller unit 58 are set at predetermined positions, directions and heights, respectively, and are fixed by the brake devices 60 and 61.

Next, as shown in FIG. 6, the scissor link mechanism 3 is actuated to raise the work table 4 to the work position, and the hydraulic cylinder 54 of the long object lifting and holding device 50 is actuated to operate the long object. The object holding table 53 is raised and the air conditioning duct P is raised to the construction height.

And, if necessary, the braking device 6
0 and 61 are loosened and the slide table 56 is slid to move the air-conditioning duct P in the horizontal direction. By moving the duct P in the axial direction, the position of the air conditioning duct P in the longitudinal direction is adjusted by the tilt angle adjusting device 62 to the roller unit 58.
The vertical angle of the air conditioning duct P is adjusted by moving up and down.

After setting the air conditioning duct P at a predetermined piping position in this manner, necessary work such as connecting hanging fittings, tightening bolts, connecting to the front and rear air conditioning ducts, etc. may be performed. At this time, if necessary, it can be performed using another aerial work vehicle.

As described above, by providing the aerial work vehicle 1 with the long object lift mechanism 5, a long object such as an air conditioning duct can be easily lifted above the work table. By providing the long object lifting / lowering holding device 50 shown in (1) on the workbench, construction of a long object can be performed very easily.

In the aerial work vehicle of the present invention, the long object lifting / lowering device is not essential, and the length and fulcrum of the arm of the long object lifting mechanism or the shape and structure of the fork are appropriately set. By doing so, it is possible to raise the long object to a sufficient height with only the long object lifting mechanism.

Further, the aerial work vehicle of the present invention is mainly intended for construction of a long object such as the air conditioning duct, but a proper attachment is attached to the fork,
By replacing the fork itself, it is possible to apply it to the mounting and replacement of ceiling panels and lamps, for example.
It is also possible to use these for transportation.

Further, the configuration and shape of each part can be set as appropriate according to the purpose of use, size, etc. of the aerial work vehicle. For example, a motor is used instead of a hydraulic cylinder for arm operation, or a fork is used. It is also possible to use a power transmission means such as a timing belt instead of the sprocket and the roller chain for the posture control of the above, or to combine an appropriate gear or link mechanism.

[0030]

As described above, the aerial work vehicle of the present invention has a pair of rotating arms provided on both sides of the base, and the ends of the rotating arms are
Since each fork is provided to keep the posture angle substantially constant, a long object can be easily lifted by the fork, and, for example, the construction of an air conditioning duct on the ceiling can be performed easily, and work efficiency is greatly improved. You can

Also, by connecting the drive shafts of both rotating arms with a shaft, the elevation rotation of both arms can be synchronized, and the roller chain is slackened between the two sprockets and the rollers are wound around the rollers. By providing the chain pressing means on the tension side of the chain and the adjusting means on the slack side to follow the pressing operation of the chain pressing means, the angle of the fork can be adjusted to prevent the articles from falling.

Further, an elevating and holding device for holding an article lifted above the work table by the fork so as to be able to ascend and descend is provided on the work table, and the horizontal position and the horizontal and vertical positions of the article held by the elevating and holding device are provided. By forming the angle of the direction so that it can be adjusted, the construction of the article can be performed very easily.

[Brief description of the drawings]

FIG. 1 is a side view of an aerial work vehicle showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a front view of a rotating arm.

FIG. 4 is a side view of a holding and adjusting mechanism for a long object.

FIG. 5 is a front view of the same.

FIG. 6 is a side view showing a state where a workbench and a long object lifting / lowering holding device are raised.

[Explanation of symbols]

1 ... Aerial work vehicle 2 ... Base 3 ... Scissor slink mechanism 4 ... Workbench 5 ... Long object lift mechanism 10 ... Case 11 ... Arm 20 ... Fork 22 ... Rotating sprocket 23 ... Fixed sprocket
24 ... Roller chain 30 ... Pushing roller
31 ... Tension roller 50 ... Long object lifting and holding device 53 ... Long object holding base 55 ... Guide rail
56 ... Slide table 57 ... Rotating beam 58 ... Roller unit 59 ... Pressing unit

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Claims (5)

(57) [Claims] 1. A work platform for aerial work, comprising a work platform that can be raised and lowered on the upper part of a base, and a pair of rotations provided on both sides of the base so as to be vertically rotatable and integrally rotatable. An arm, a fork rotatably provided at the tip of each of the rotating arms, a fixed sprocket fixed coaxially to the center of rotation of the rotating arm and fixed to a base, and a fork of the both forks. The rotary sprocket is provided coaxially with the center of rotation and rotates together with the fork, and a roller chain that is hung between the two sprockets. An aerial work vehicle having a length and a turning angle capable of turning from a position near a floor surface to a position above the work table. 2. The aerial work vehicle according to claim 1, wherein both of the rotating arms have drive shafts connected by a shaft. 3. The roller chain is stretched around both sprockets with a slack, and the tension side of the roller chain pushes a part of its span so that the tip of the fork of the fork rises. The chain pushing means for rotating the roller chain in the direction is provided, and the loosening side of the roller chain is provided with adjusting means for adjusting the looseness of the roller chain by following the holding operation of the chain pushing means. The aerial work vehicle described. 4. The aerial work vehicle according to claim 1, wherein the workbench includes an elevating / holding device that holds an article that has been lifted above the workbench by the fork so that the article can be lifted / lowered. 5. The elevating and lowering device is slidable on an elevating means provided on the workbench and on an upper end portion of the elevating means in a horizontal direction and in a direction orthogonal to a rotation axis of the both rotating arms. A slide table provided, a rotary member rotatably provided on the slide table, and both ends of the rotary member on the rotary arm side to move the article in both rotary arm directions. The aerial work vehicle according to claim 4, further comprising: a support member that supports the support member, and an inclination angle adjusting unit that adjusts a vertical position of the support member.