JPS63310499A - Operation platform-rotating lift equipment - 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] [Field of Industrial Application] The present invention relates to a lifting device capable of lifting personnel and materials to a high place by vertically moving a work platform while maintaining it horizontally above a vehicle body. The present invention relates to a lifting device capable of rotating a worktable, which can expand the working range by horizontally rotating the worktable.

[Conventional technology]

Lifting devices that raise and lower work platforms are often used for work such as assembly, painting, repair, etc. in high places such as highways and building construction, or moving work in high places such as buildings.
Work at high places was performed by placing workers, materials, and various equipment on this lifting platform and lifting and lowering them.

In this conventional lifting device, a pair of arms are pivoted at the center to form a set, and a pantograph-like extension mechanism is used in which the plurality of arms are connected in the vertical direction (
The so-called scissor type) was widely used because it freed up a large amount of floor space for the workbench. In addition, a lifting device (referred to as an "X-lift"), which is an improvement on this scissor type and is configured so that multiple booms are telescopically inserted into the inside of the arm so that one arm can be extended and contracted in its length direction, is also available. (Japanese Patent Application No. 124487 of 1982, Patent Application No. 191065 of 1981, etc.), and furthermore, a single telescopic boom body is interposed between the vehicle body and the lifting platform to simplify the boom mechanism. A lifting device (referred to as a zoom lift) has also been provided (for example, Japanese Patent Application No. 64803 of 1986).

In this way, with aerial work vehicles such as scissor slits, It is characterized by its presence.

In this respect, the structure and purpose of use are significantly different from a system called a boom-type aerial work vehicle, in which a bucket is attached to the tip of a telescoping boom to move packets to any position.

In recent years, zoom lifts have been widely used because of their simple structure. This zoom lift not only moves the workbench vertically up and down, but also moves the workbench horizontally forward or backward relative to the vehicle body by controlling the lengthwise extension of the zoom and its elevation angle. As a result, the scope of its use has been greatly expanded compared to conventional scissor type and X-lifts.

[Problem that the invention seeks to solve]

However, even with zoom lifts that use a single telescoping boom body and can freely move the work platform forward or backward of the vehicle body, there is no degree of freedom in the lateral direction of the vehicle body. When moving the machine horizontally along a wall surface, if there is a gap between the wall surface and the workbench, it is not possible to carry out repairs, painting, etc. continuously. For this reason, a mechanism has been desired that allows the workbench to approach the side of the vehicle body.

[Means for solving problems]

In view of the above-mentioned drawbacks, the present invention provides a movable vehicle body, a boom body placed on the vehicle body that can be raised and retracted, and a boom body that is attached to the boom at the tip of the boom body and can rotate with respect to the axial direction of the boom body. It consists of a rotating means and a work platform that is connected to the rotating means and can be maintained parallel to the vehicle body at all times, and the work platform can be rotated in the circumferential direction of the boom body while the boom body is raised slightly perpendicular to the vehicle body. The present invention provides an elevating and lowering device in which a workbench can be rotated.

[Effect]

With such a configuration, the workbench can be moved to any height position by the boom body which can be raised up and down relative to the vehicle body and can be extended and contracted in the length direction. If the workbench is to be protruded from the side of the vehicle body to perform work in the lateral direction, the boom body should be lifted almost perpendicularly to the vehicle body, and the swiveling mechanism attached to the upper end of the boom body should be used. The means rotate the workbench relative to the horizontal direction. As a result, the tip of the workbench swings out from the side surface of the vehicle body, and the side surface of the workbench protrudes outward from the side surface of the vehicle body. Therefore, when working on walls that are far away from the sides of the vehicle, the worker is mounted on the tip of the workbench and slowly moves the vehicle against the wall to continuously work on walls at high places. It is something that can be done.

〔Example〕

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

In this elevating device, first, a front wheel 2 and a rear wheel 3 are pivotally supported on the front, rear, left and right sides of a car body l, which has various driving equipment such as an engine and a hydraulic pump attached to the bottom.
It is constructed so that it can move freely on horizontal ground and can change direction.

A pair of slightly trapezoidal shaft supports are fixed at approximately the center of the upper surface of the vehicle body 1 so as to protrude at intervals, and between the shaft supports 4 there is an internal hollow space having a rectangular cross section. A lower boom 5 is inserted therein, and the shaft support 4 and the lower boom 5 are swingably connected by a pin 6. A shaft support piece 7 is fixed to the back surface of the lower boom 5, and two hydraulic cylinders 8 are interposed between the shaft support piece 7 and the vehicle body 1 on the left and right sides of the lower boom 5. It's a shame. The tip of the lower boom 5 has a rectangular opening, and a hollow boom 9 having a circular cross section is slidably inserted into the opening. A tip boom 10 having a circular cross section is slidably inserted therethrough.

A boom body 11 is constituted by the lower pool 5, the middle pool 9, and the front boom 10.

A swing mechanism 12 is fixed to the tip of the front boom lO, and a cover unit 13 having a U-shaped cross section and opening downward is fixed to the swing unit $112.
The upper inner surface of the upper boom 5 is spaced parallel to the outside of the lower boom 5, and a gap is formed between the front boom 10 and the cover unit 13 to allow the lower boom 5 to pass through. It is a workbench for izing materials and materials, and this workbench 1
A pair of shaft support plates 15 are fixed downwardly to the lower surface of one example of 4, and the cover unit 13 is inserted between the shaft support plates 15, and the cover unit 13 and the shaft support plate 15 are connected to each other. is pin 1
It is rotatably connected by 6. A hydraulic cylinder 17 for angle correction is interposed between the central lower part of the cover and the approximately central lower surface of the workbench 14. Furthermore, a handrail 18 stands vertically on the outer periphery of the upper surface of the workbench 14.

Next, FIG. 3 shows a cross-sectional structure of the boom body 11. Here, the lower boom 5 is in the shape of a square vibrator with a hollow interior and a square cross section, and inside the lower boom 5 there is slid an intermediate pool 9 whose outer diameter is slightly smaller than the inner diameter of the lower boom 5. Although not shown, a support mechanism such as a roller is provided between the lower boom 5 and the middle boom 9. Further, a tip boom 10 whose outer diameter is slightly smaller than the inner diameter of the middle boom 9 is slidably inserted inside the middle boom 9, and the middle boom 9 and the tip boom 10
Although not shown, a support mechanism such as a roller is provided between them. The cover unit 13 is connected to the tip of the front boom 10, but is sized so that when the boom body 11 is contracted, the cover unit 13 is located outside the lower boom 5. A roller 20 that contacts the upper surface of the lower boom 5 is pivotally supported on the upper surface of the lower end of the cover unit 13. As a result, the cover unit 13 is attached to the roller 2 at its tip.
0, a part of the stress is transmitted to the upper surface of the lower pool 5.

Further, FIG. 4 is a sectional view showing in detail the turning mechanism 12 provided at the tip of the tip pool 10.

At the tip opening of the tip boom 10, there is a rotating body 2 having a hollow cylindrical shape with a lower part slightly smaller than the inner diameter of the tip boom 10.
5 is inserted, and the inside of the front boom lO and the rotating body 25
A bearing 26 is interposed between the outer peripheries of the lower part.

An internal gear 27 is fixed to the lower inner periphery of the rotating body 25. A hydraulic motor 28 is fixed to the inner wall of the front boom IO, and a drive gear 29 is fixed to the output shaft of the hydraulic motor 28, and the drive gear 29 is meshed with the internal gear 27. The upper end of this rotating body 25 has a flat shape, and the inner wall of the cover unit 13 is in close contact with the upper end of this rotating body 25, and both are connected by bolts 30. FIG. 5 shows an exploded view of the structure in FIG. 4.

Next, the operation of this embodiment will be explained. First, in order to vertically raise the workbench 14, the engine housed in the lower part of the vehicle body 1 is operated to generate hydraulic pressure, and each hydraulic cylinder 8.
17 and a telescoping hydraulic cylinder (not shown) stored in the lower boom 5. When hydraulic pressure is supplied to the hydraulic cylinder stored in the lower boom 5, the middle pool 9 and the front pool lO each slides,
It operates to lengthen the full stroke of the boom body 11. Furthermore, the extension of the hydraulic cylinder 8 causes the lower boom 5 to be elevated relative to the vehicle body 1 about the pin 6, and the lower boom 5, middle boom 9, and front boom 10 are gradually lifted in the vertical direction. In addition, since the hydraulic cylinder 17 also acts at the same time,
The cover unit 13 and the workbench 14 are operated around the pin 16 so that their opening angles are widened, and the two hydraulic cylinders 8.
By synchronizing the extension amount of 17, the work platform 14 always rises parallel to the vehicle body 1, and the vehicle body 1, the boom body 11, and the work platform 14 operate so as to form a two-shape when viewed from the side. . By synchronizing the extension amount of the telescopic hydraulic cylinder housed in the lower boom 5 and the operating amount of the elevation hydraulic cylinder 8, the pin 16 can be moved in a straight line perpendicular to the vehicle body 1. is completed, workbench 14
Once the work platform 14 has been raised to a predetermined height position, the worker can raise the work platform 14 vertically and horizontally with respect to the vehicle body l. When the hydraulic cylinder of
The workbench 14 is held at that height position and allows work such as assembly, repair, painting, etc. to be performed at a height.

FIG. 2 shows a state in which the workbench 14 is lifted vertically in this manner to perform work at a high location.

Next, even if the workbench 14 is raised as shown in FIG.
The degree of freedom is small. For this reason, next workbench 14
The case of rotating will be explained.

Further operate the hydraulic cylinder 8.17 and the telescopic hydraulic cylinder housed in the lower boom 5 as described above,
The hydraulic cylinder 8 is operated until the boom body 11 becomes perpendicular to the vehicle body 1 with the pin 6 as the center. FIG. 6 shows a state in which the boom body 11 is lifted perpendicularly to the vehicle body 1 by the hydraulic cylinder 8. In this state, the axis of the front boom 10 and the horizontal line of the workbench 14 are at right angles.

In this state, hydraulic pressure is supplied to the hydraulic motor 28 while keeping the hydraulic cylinder 8.17 fixed. Then, the drive gear 29 fixed to the output shaft of the hydraulic motor 28 operates,
This rotation of the drive gear 29 is transmitted to the internal gear 27 and the rotating body 25, and the rotating body 25 is rotated in the axial direction of the tip poom 10. Then, at the same time as the rotating body 25 rotates, the cover unit 13 also rotates, and the workbench 14, shaft support plate 15, hydraulic cylinder 17, etc. connected to the cover 13 also rotate at the same time, and the workbench 14 is rotated at the first position relative to the vehicle body 1. It can turn in the direction of A in Figure 6. Therefore, when the workbench 14 is turned 90 degrees from the state shown in FIG. 6, the axis of the workbench 14 will be located at right angles to the longitudinal direction of the vehicle body l.
The tip of the workbench 14 protrudes more than the side surface of the vehicle body l. FIG. 7 shows a state in which the workbench 14 is turned 90 degrees with respect to the vehicle body 1. As shown in FIG. 7, the tip of the workbench 14 can protrude from the side surface of the vehicle body l by a length B, and the distance between the workpiece such as a wall blocked by the front wheels 2 and rear wheels 3 is This allows work to be done with the tip of the workbench 14 close to the wall surface.

In addition, when lowering the work platform 14 from the rotated state shown in FIG. At the same time as the hydraulic cylinder 8.17 is contracted, the telescopic hydraulic cylinder housed in the lower boom 5 is contracted, and the boom body 11 is contracted. Then, as described above, the vehicle body 1, the boom body 11, and the workbench 14 form a double shape as shown in FIG. It can be attached closely to the top of the

〔effect〕

Since the present invention is constructed as described above, the workbench can have a greater degree of freedom in the lateral direction of the vehicle body, whereas in the past, the workbench had limited freedom in the front and back directions, and Even when the workbench is far away from the workbench, the tip of the workbench can be brought close to the wall surface, making repairs and work at high places easier.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an aerial work vehicle which is an embodiment of the present invention, Fig. 2 is a side view showing the work platform in a lifted state, and Fig. 3 is a sectional view showing the configuration of each part of the boom body. , FIG. 4 is a sectional view showing the turning mechanism, FIG. 5 is an exploded perspective view of the same, and FIG.
FIG. 7 is a side view showing the boom body lifted vertically, and FIG. 7 is a front view showing the workbench swiveled. l...Vehicle body, 5...Lower boom, 9...Middle boom,
! 0... Tip boom, 11... Boom body, 12...
Swivel mechanism, 13...cover integrated, 14...workbench, 2
4...Rotating body, 28...Hydraulic motor. Patent Applicant: Hikoma Seisakusho Co., Ltd. Agent: Patent Attorney Hibi Akeaki Figure 2 Old Figure 3 Figure 4

Claims (1)

[Claims] A movable vehicle body, a boom body placed on the vehicle body that can be elevated and extended, a rotating means attached to the boom at the tip of the boom body and capable of rotating in the axial direction of the boom body, and connected to the rotating means. work that consists of a work platform that can be held parallel to the vehicle body at all times, and that the work platform can be rotated in the circumferential direction of the boom body while the boom body is raised slightly perpendicular to the vehicle body. Lifting device that allows the platform to rotate.