JPS5982300A - Height service car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aerial work vehicle with good operability at altitude.

In general, in aerial work vehicles, as a means to keep the work platform balanced, a cylinder for 1,000 vehicles is used as in Japanese Patent Application Laid-Open No. 49-129301, or a parallel link is used as in Japanese Utility Model Publication No. 15520-1983. There is. However, in both cases, because the rotation angle of the tip of the tip was small, it took time to move the workbench at high places, and it was difficult to move the workbench.

The present invention solves the above-mentioned drawbacks, and includes a rotating part mounted on a vehicle chassis so as to be rotatable, a first boom pivotably supported on the rotating part so as to be able to raise and lower, and a second boom rotatably mounted on the tip of the first boom. An aerial work vehicle is provided with a work platform at the tip of the second boom, and a linkage mechanism is provided between the rotating part, the first boom, the second boom, and the work platform, and the second boom is The present invention provides an MHr work vehicle which is unique in that it can rotate within a range of approximately 180 degrees with respect to a first boom.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 2nd at the tip
J4'4 of the boom 5 is rotatably pivoted B, and the second
A workbench 6 is attached to the tip of the boom 5 via a bracket 60 in a pivotally supported state. The workbench 6 is equipped with an operating means (not shown), and boom-related operations can be performed as appropriate by operating the operating means.

Reference numeral 7 denotes a hydraulic cylinder for raising and lowering, the base end of which is rotatably connected to the intermediate portion of the first boom 4 via a bracket 9, and the base end thereof to the vicinity of the intermediate portion of the swing portion 6.

10 is a hydraulic cylinder for rotation; 1. Base end is bracket 11
The tip of the first boom 4 is rotatably connected to a J-shaped arm 12, which will be described later, through a middle portion of the first boom 4.

Reference numeral 14 denotes a linking mechanism for horizontally holding the workbench, which includes the tip of a link 15 rotatably supported on the same axis as the pivot connecting portion B between the first boom 4 and the second boom 5, and a rotating portion 6. Pivotally connect the tip and 0. A 10th joint member 16 that is connected to D, a 20th joint member 18 that connects the tip 0 of the connecting link 15 and the lower part of the workbench B via a bracket 17 with a 4-section F-shaped rod;
A bracket 60 connects one end of the bell crank 19 which is coaxially supported with the pivot 3 portion (other products are pivotally connected to the 10th member on the right side) and the lower part of the workbench 6. AEOD, EOFK, and BEHG each form a parallel link, and the pivot points E and 0, which are the nodes of the parallel link, connect the parallel links ABOD and EOFK. The pivot point B also serves as a common node between the parallel links BcFE and BERG.

Therefore, the three parallel links are linked along the pivot point B and are always parallel to each other. By holding the workbench 6, the workbench 6 can be adjusted and held in a horizontal position regardless of the up-and-down and rotational states of the first and second pools 4 and 5.

Jacks 21 are installed at four locations on both the front and rear sides of the chassis 2 so as to be able to extend diagonally downward, and support the chassis 2 during work.

22 is a rotating vJ mechanism of the second boom 5, and the J-shaped arm 1
2 is pivoted 23 to the tip of the first boom 4, the tip is pivoted 25 to one end of the link 24, and the other end of the link 24 is pivoted 27 to the second boom 5 via a bracket 26. As a result, the second boom 5 rotates within a range of approximately 180 degrees with respect to the first boom 4 due to the rotation of the J-shaped arm 12 by the rotational hydraulic cylinder 10! 1iIJ is possible.

Next, the workbench 6 will be explained. The workbench 6 consists of a front workbench 61 and a rear workbench 62, and when the local work vehicle 1 is traveling, it can leave the rear workbench 62 and move within the limits of the vehicle commander. The total length of the chassis is sufficient for the actual price. The second boom 5, the 20th tube member 18, and the 60th. Door member 2
o are all attached to the central part 8f163 of the front workbench 61, and the i&ltls workbench 62 is connected 64, 65 to the upper and lower ends of the front workbench 61 only during work.

In addition, FIG. 5 shows another embodiment of the workbench 6.
It consists of a workbench 66 and a rear workbench 67, and is cut f)! The S-made Shiba stand 66 is the same as the workbench 61 in the J section 1j; 11
2 boom 5, 20th. It is attached to the HIS material 18 and the 60° resistant member 2o (not shown). On the other hand, the rear workbench 67 consists of frames 68, 69.70, a floor plate 71, and bending links 72.73. 75.7
6, and the other j4Mi are pivoted 77.78°79 to the upper, center, and lower parts of the rear part of the front workbench 66, and a bending link is provided between the center of the rear end of the front workbench 66 and the floor plate 71. Both ends of 72 and 75 are pivoted 80 and 81.

The pivots 74, 75, 78.77 and 76.79 form parallel link joints, and are in the extended position as shown by the solid line in FIG. Rotate it upwards and fold it into a retractable position like the two-point chain in Figure 5.

To briefly explain the operation of the present invention, when working at heights, first, yi is
The rear workbench 62 is connected to the J section workbench 61 (or +ii the cutout section making stand 67 is placed in an extended position with respect to the J section workbench 66). Then, when the extra-large hydraulic cylinder is extended and the first boom 4 is raised and lifted; j': 4 i+
1 solid line 4'i1. (It is possible to move to any position within the work range, not just the standard ml).

At this time, parallel links ABOD, BOFK and EEHG
By maintaining the parallelism of , the work platform 6 rises while maintaining its initial state and reaches the solid line position ia 6 A in FIG. When cylinder 0 is extended, J-shaped arm 1
2. The second boom 5 rotates counterclockwise via the link 24, and the work platform 6 moves to a position such as @6B+60. In addition, the workbench 6 can be adjusted according to the extension of the rotating cylinder! 6
Movement in a rotation range of approximately 180 degrees from A to 4rL IKt 6 '& is iJ'r::<. In this rotation range, due to the existence of two parallel links BOFEi and BEHG, all the nodes of the parallel links exist on -Mk (
Since there is no dead center), the workbench 6 always maintains an equilibrium state.

As described above, in the present invention, a swivel part is rotatably mounted on a vehicle chassis, a first boom is rotatably supported on the swivel part, and a second boom is rotatably pivoted at the tip of the mountain 1 poom. The second boom is supported by a chestnut wheel and has a work platform at the tip of the second boom. By providing an aerial work vehicle that has the ability to rotate within a range of approximately 180 degrees relative to the boom, it is possible to quickly move the work platform over a wide range at heights by simply rotating the second boom. can be done.

In addition, if the workbench is configured with a front workbench and a rear workbench, the space available for the front workbench will be the only one left when the vehicle is not in use, ensuring a sufficient length of the undercarriage for the total length of the aerial work platform. When a pan-type car is used, a large loading space can be taken.

[Brief explanation of the drawing]

Fig. 1 is an overall side curved view of the present invention, Fig. 2 is a partially cutaway IIA side view of the main part, Fig. 6 is a plane view of the main part, Fig. 4 + W working state diagram, and Fig. 5 is a diagram showing the construction. It is a 4-piece side view of another example of a liquid stand. 1... Nadokoro work vehicle, 2... Chassis, 6... Swivel part, 4... First boom, 5... Second boom,
6...Workbench, 61.66...Front workbench, 6
2.66...f2 part m a, 1 4 ・-
・・a=+i:s, ABOD,,+3CFE,BE
HG...Parallel link (section).

Claims (4)

[Claims] (1) A swivel part is rotatably mounted on the vehicle chassis, a first boom is rotatably supported on the swivel part, a second boom is rotatably supported on the tip of the first boom, and the first boom is rotatably supported on the tip of the first boom. It is a local work vehicle equipped with a work platform at the tip of two booms, and has a rotating section and a first
Boom, second boom, and workbench! ! ! An aerial work vehicle characterized by being provided with a mooring mechanism 44, so that the second boom can rotate within a range of approximately 180 degrees relative to the first boom. (2) The linkage mechanism consists of one parallel link provided between the swing section and the first boom, and two parallel links provided between the 'fr 2 boom and the work platform, with one of the former The elevated vehicle according to claim 1, in which one section of the parallel link and one section of the latter two parallel links are common. (3) The aerial work vehicle described in the 4vM item 1 of the patent ml request, wherein the workbench consists of a t'ttl rear workbench, and the rear workbench is detachable. (4) The workbench consists of a front and rear workbench, and the rear workbench is foldable! F. Local work vehicle according to claim 1.