JPS6363478B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-altitude lifting device that can be used to lift workers, materials, etc. to high places, and for high-place work on overpasses and high-rise buildings.

[Conventional technology]

In recent years, the number of three-dimensional structures such as high-rise buildings and overpasses has increased, and with this, it is necessary to lift workers and materials from the ground surface to high-altitude work sites, tighten bolts on the underside of overpasses, paint, and move from lower floors to upper floors. Work at heights, such as installing flooring on floors, has become necessary.

For this reason, various lifting devices have been developed and used, but when the work platform on which the worker is mounted rises to a high position, it becomes unstable and swings due to wind etc.
This creates a sense of anxiety among workers, making it difficult to work at heights with peace of mind. For this reason, countermeasures have been taken, such as making the mechanism for lifting the workbench stronger to prevent it from shaking due to wind or the like, or adding a reinforcing mechanism to prevent the workbench from shaking.

However, in either method, the weight of the device increases in order to make it sturdy, making manufacturing complicated and inconvenient to transport.

In order to improve this drawback, for example, like a ladder truck used for firefighting, multiple ropes are attached to an extended workbench, and these ropes are pulled on opposite sides to prevent the tip of the workbench from shaking. Methods to reduce this have also been used in the past. This configuration reduces the weight of the telescoping mechanism that supports the workbench, resulting in an extremely thin and light configuration, but it requires multiple dedicated workers to support the rope, so it is not commonly used.

For this reason, in recent years, a rotation regulating mechanism has been installed between the workbench and the telescoping mechanism that moves it up and down.
By synchronously letting out two or more wires wound around this rotation regulating mechanism, the opposing wires are constantly pulled, and the workbench is raised and lowered in a stable manner, thereby preventing the workbench from swinging due to wind, etc. A high-altitude lifting device that can prevent this problem has also been proposed (Patent Application No. 129201 of 1982).

However, with this new high-altitude lifting device, the length of the wire fluctuates when the work platform is raised and lowered, so a mechanism is required to pay out and wind up the wire as the work platform is raised and lowered, which requires its own power. This has the disadvantage that it requires synchronization with the expansion and contraction mechanism, making the structure complicated.

[Problem to be solved by the invention]

In view of the above-mentioned drawbacks, the present invention provides a high-altitude elevating device that can automatically pay out and wind up the wire according to the operation of the telescopic mechanism, and has a simple structure.

[Means for solving problems]

The present invention includes a base, a telescoping mechanism fixed vertically on the base and capable of telescopically inserting a plurality of pipes of different diameters and expanding and contracting them in the length direction, and a telescoping mechanism fixed to the upper end of the telescoping mechanism. a workbench and
At least one component provided between the telescoping mechanism and the workbench
One end of each is connected to two opposing positions across the rotation regulating mechanism and the telescopic mechanism on the base, and after passing through the rotation regulating mechanism, the other end of each can be pulled out from inside the telescopic mechanism and stored. In the high-altitude lifting device consisting of at least one set of two wires, the rotation regulating mechanism is
Two pulleys are rotatably supported with their axes aligned, a differential gear is fixed to each pulley with their axes aligned, and the gear meshes with both differential gears to control the circumferential speed of both pulleys. and an intermediate differential gear for regulating the rotation directions of both pulleys in opposite directions, and each of the wires constitutes an expansion and contraction mechanism after each of the wires is brought into contact with the outer periphery of each pulley. A high-altitude lift characterized by passing between each pipe by alternately inverting the lower and upper ends of the pipes via a guide member, and elastically connecting each other end to the pipe at the base of the telescopic mechanism. It provides equipment.

[Effect]

In the present invention, a rotation regulating mechanism is provided between the workbench and the telescoping mechanism that moves it up and down, and two or more wires wound around two pulleys in this rotation regulating mechanism are respectively paid out in synchronization. be able to. Therefore, the opposing wires are always pulled, and the workbench is raised and lowered in a stable manner, thereby preventing the workbench from swinging due to wind or the like. Further, there is no need for a dedicated worker to hold the wire, and since the wire can be automatically stretched as the telescoping mechanism expands and contracts, operating costs are reduced. Furthermore, the wire is retained inside the telescopic mechanism and is automatically unwound by the extension of the telescopic mechanism, eliminating the need for dedicated power for winding the wire.

〔Example〕

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

FIG. 1 is a perspective view of this embodiment, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof.

Wheels 2 are supported on the lower surface of each of the four corners of a vehicle body 1, which serves as a base assembled into a ladder-like rectangular frame, so that the vehicle body 1 can be easily moved by the wheels 2 while remaining horizontal. It's summery. This car body 1
Two storage pipes 3 and 4, each having a rectangular cross section and a hollow interior, are fixed horizontally so as to intersect with each other.
Each of the storage pipes 3 and 4 is arranged at an angle of 45 degrees with respect to the length direction of the vehicle body 1, respectively. Both storage pipes 3 and 4 have an X-shape that intersects at right angles, and the part where these storage pipes 3 and 4 intersect is located at the center of the vehicle body 1. Auxiliary pipes 5, 6, 7, and 8 each having an elongated rectangular cross section are slidably inserted into both open ends of each of the storage pipes 3 and 4, and the lower end of each of the auxiliary pipes 5 to 8 is vertically movable. Fixing legs 9 to 12 are attached to the auxiliary pipes 5 to 8, and inverted U-shaped fixing fittings 13 to 16 are respectively fixed to the upper surfaces of the tips of the auxiliary pipes 5 to 8.

Next, a base pipe 17 is installed vertically in the center of the vehicle body 1.
is held, and an inverted L-shaped ladder 18 is fixed between the vicinity of the top of this base pipe 17 and the upper surface of the vehicle body 1. The base pipe 17 is an elongated pipe having a hollow cylindrical shape, and houses therein a hydraulic cylinder 19, an intermediate pipe 20 extended by the hydraulic cylinder 19, and an operating pipe 21. These base pipe 17, intermediate pipe 20, and actuating pipe 21 constitute a telescopic device, and together they form an expansion and contraction mechanism. A rotation regulating body 22, which will be described later, is fixed to the top of the operating pipe 21, and a work platform 23 on which a worker rides is fixed to the upper part of the rotation regulating body 22. Further, a hydraulic pressure generating device 24 containing an engine and hydraulic oil is fixed on the upper surface of the vehicle body 1, and the hydraulic pressure generating device 24 and a hydraulic cylinder 19 housed in a base pipe 17 are connected by a hydraulic hose 25. There is.

4 and 5 show the structure of the rotation regulating body 22 described above in detail. Two sets of rotation regulating mechanisms are built into the rotation regulating body 22, one above the other.

This rotation regulating body 22 includes a bottom plate 26 fixed to the operating pipe 21 and a top plate 2 fixed to the workbench 23.
7 and a side plate 28 that connects the bottom plate 26 and the top plate 27 at intervals, forming an outer frame.

Both the bottom plate 26 and the top plate 27 have a rectangular shape and are positioned parallel to each other with an interval between them, and a side plate 28 in the shape of a long and thin plate is installed between the centers of both sides of the bottom plate 26 and the top plate 27. The bottom plate 26 and the side plates 28, and the top plate 27 and the side plates 28 are fastened and fixed with bolts 29 and 30, respectively, to form a birdcage-shaped frame.

A central axis 3 is located between the bottom plate 26 and the top plate 27.
1 is fixed, and horizontal shafts 32 are located at a distance of 1/4 from the bottom plate 26 and 1/4 from the top plate 27 of this central shaft 31 (the lower horizontal shaft 32 is shown in the figure). (not shown), the side plate 28 and the horizontal shaft 32 are connected by bolts 33.

Intermediate gears 34 and 35 formed as bevel gears are rotatably supported above and below the center shaft 31, and drive gears 36 and 37 formed as bevel gears are rotatably supported on the horizontal shaft 32 from the left and right. It is pivoted. The intermediate gear 34 is meshed with the drive gears 36 and 37, respectively, and the four gears 34 to 37 rotate in cooperation with each other, and the drive gear 36 and the drive gear 37 rotate in opposite directions at the same rotation speed. Become. Each drive gear 36, 37 has a pulley 38, 3.
9 is fixed.

Further, the ends of wires 40 to 43 are connected to the fixing fittings 13 to 16, respectively, and each of the wires 40 to 43 is wound around a pulley 38, 39 in the rotation regulating body 22. The terminal end of 43 is housed in the base pipe 17. These opposing wires 40 and 42 and wires 41 and 43 are each wound one turn or more around pulleys 38 and 39 that rotate simultaneously (the winding of wires 41 and 43 in the figure is not shown in FIG. 5, but is similar). ).

Next, FIG. 6 shows the internal structure of the above-mentioned telescopic mechanism.

The base pipe 17, the intermediate pipe 20, and the operating pipe 21 each have a thin-walled cylindrical shape, and are telescopically constructed so that they are inserted concentrically so that they can slide. An operating pipe 21 is vertically expandable and retractable on the intermediate pipe 20, and a rod of a hydraulic cylinder 19 housed in the base pipe 17 is connected to the bottom surface of the intermediate pipe 21. A pair of pulleys 44 and 45 are pivotally supported on the bottom surface of the intermediate pipe 20 at intervals by a pin 46, and a pulley 47 is also pivotally supported on the bottom surface of the operating pipe 21 by a pin 48. . A pulley 49 is pivotally supported at the top of the base pipe 17 by a pin 50, and pulleys 51 and 53 are vertically spaced apart from each other at the top of the intermediate pipe 20.
2,54. Further, wire grooves 55, 56, 57, and 58 are formed on the outside of the intermediate pipe 20 and the outside of the working pipe 21, respectively, along the respective axial directions and at opposite positions. On the outside of the base pipe 17 and below the pulley 49 is a stop plate 59 with a vertical through hole in the center.
A spring catch 60 is fixed to the outside of the base pipe 17 below the stop plate 59.

Then, the wire 40 wound around the pulley 39 is reversed upward through the wire groove 55, the pulley 47, and the wire groove 56, and
1 and 53 into an S-shape, and is again turned upward via the wire groove 57, the pulleys 44 and 45, and the wire groove 58. Next, the wire 40 is directed downward by a pulley 49, passes through a hole formed in a stop plate 59, and a large diameter stopper 61 is fixed to the end of the wire.
A spring 62 is interposed between 1 and the spring hook 60.

FIG. 7 is a cross-sectional view taken along line XX in FIG. 6.

Next, the operation of this embodiment will be explained.

When moving this elevating device to a place where work is to be done, for example, under an overpass, on the floor of a building, or under a utility pole, it is very easily moved by the wheels 2 and stopped at a predetermined place.

Then, from the storage pipes 3 and 4, the auxiliary pipe 5~
8 is pulled out in the direction of arrow A, and the tips of each of the auxiliary pipes 5 to 8 are separated from the center of the vehicle body 1 to form a large X-shape, thereby improving the stability of the vehicle body 1. Then,
Fixed legs 9-1 provided at the tip of each auxiliary pipe 5-8
2 is lowered and held in that position by the fixed legs 9 to 12 so that the vehicle body 1 does not move arbitrarily.

Next, the engine in the hydraulic pressure generator 24 is started, and high-pressure hydraulic pressure is supplied to the hydraulic cylinder 19 housed in the base pipe 17 via the hydraulic hose 25, so that the hydraulic cylinder 19 is expanded. As a result, the intermediate pipe 20 connected to the hydraulic cylinder 19,
The operating pipe 21 is extended from the top end of the base pipe 17, and thereby the rotation regulating body 22 and the workbench 2
3 in the direction of arrow B in the figure. The workers and materials are boarded inside the workbench 23 via a ladder 18, and when the workbench 23 is raised, the workers and materials are lifted to the required height.

When the hydraulic cylinder 19 is extended, the intermediate pipe 20 is pushed upward from the base pipe 17,
The operating pipe 21 is also pushed upward. However, since a wire 40 is wound around the bottom of the intermediate pipe 20 and the working pipe 21, the working pipe 21 also rises as the intermediate pipe 20 is pushed up, but the pulley 39 is still winding the wire 40. Therefore, in order for the working pipe 21 to rise, the pulley 39 must rotate to pull out the wire 40 from the working pipe 21. Therefore, the working pipe 21 is pulled upward by the amount that the wire 40 is pulled out, and the distance between the intermediate pipe 20 and the working pipe 21 becomes larger.

When the wire 40 is pulled, its terminal end is pulled toward the top of the base pipe 17, but since the stopper 61 is locked to the stop plate 59, the wire 40 is pulled between the intermediate pipe 20 and the operating pipe 2.
1, the hydraulic cylinder 19 is stretched to its maximum length, and when the hydraulic cylinder 19 is extended, the working pipe 2
1 rises by the sum of the amount of extension of the intermediate pipe 20 and the amount of tension by the wire 40, pushing up the lifting platform 23 to a higher position. Wire 40 is pulley 4
4, 45, slide the wire groove 57,
Rotate the pulleys 51 and 53 to open the wire groove 56.
, rotates the pulley 47, slides the wire groove 55, and is pulled out from the base pipe 17.

The wire 40 is pulled out as described above, but the other wires 41 to 43 are also pulled out by rotating the pulleys 38 and 39 of the rotation regulating body 22. At this time, the pulleys 38 and 39 are fixed to the drive gears 36 and 37, and each drive gear 36,
Since the intermediate gears 34 and 35 are meshed with the drive gears 37 and 37, the drive gears 36 and 37 rotate in opposite directions and at the same rotational speed, so that the pulleys 38 and
The number of rotations of the wires 39 is also the same, and the amounts of the wires 40 and 42 that are fed out are the same. For this reason, the rotation regulating body 22 is the apex, and the fixing metal fittings 13,
A triangle with 15 as both ends of the base always forms an isosceles triangle, and the rotation regulating body 22 has both wires 40,
42 (and wire 4 in the horizontally perpendicular position)
1, 43) are pulled from the left and right and restricted to extend only in the vertical direction, and the workbench 23 is held with moderate tension from all sides by wires 40 to 43 without shaking from side to side, allowing it to rise stably. I will do it.

Next, when lowering the workbench 23, the hydraulic pressure of the hydraulic cylinder 19 in the base pipe 17 is decreased, contrary to the above. Then, the operating pipe 21 and the intermediate pipe 20 are housed in the base pipe 17, and the rotation regulating body 22 and the workbench 23 are lowered.

The wires 40 to 43 that were being stretched at this time will be bent due to the shortening of the distance between the rotation regulating body 22 and the fixing fittings 13 to 16, but the intermediate pipe 20 and the operating pipe 21 are connected to the base by the hydraulic cylinder 19. The slack in the wires 40 to 43 descending into the pipe 17 is removed by rotating the pulleys 38 and 39. Therefore, the wires 40 to 43 are stretched without bending, and the workbench 23 is stably lowered. In the unlikely event that the wire 40 becomes slack, the end of the wire 40 is pulled by the spring 62, so that the wire 40 does not fit inside the wire grooves 55, 56, 57, and 58.
0 will no longer bend.

In winding up the wires 40 to 43, the pulleys 38 and 39 are rotated in the opposite direction as described above, but the amount of winding is the same due to the gears 34 to 37. 1
The distances from wires 3 to 16 are the same length, and the rotation regulating body 22 is pulled from the left and right by the tension of these wires 40 to 43, so the workbench 23 descends only in the vertical direction and does not swing, making it stable. The decline will be maintained.

〔effect〕

Since the present invention is constructed as described above, the workbench is pulled from the left and right by the wires, and even if it rises to a high position, it is stably held without swinging, thereby reducing worker anxiety. This can be resolved and accidents can be prevented. Further, since the wound wire is automatically stored within the expansion and contraction mechanism, a dedicated winding mechanism is not required, and the structure is simplified.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a side view of the same as above, Figure 3 is a plan view of the same as above, and Figure 4 is a side view of the same as above.
The figure is a side view with a part of the rotation regulating body cut away, FIG. 5 is an exploded perspective view showing the driving part of the same as above, FIG. It is a XX arrow view. 1... Vehicle body as a base, 17... Base pipe, 20... Intermediate pipe, 21... Operating pipe,
22... Rotation regulator, 23... Workbench, 40-4
3...Wire.

Claims (1)

[Claims] 1. A base 1, fixed vertically on the base 1,
A telescopic mechanism that can telescopically insert a plurality of pipes 17, 20, and 21 of different diameters and expand and contract in the length direction, a work table 23 fixed to the upper end of this expandable mechanism, and a A rotation regulating body 22 having at least one rotation regulating mechanism provided therebetween, and one end of each connected to two positions facing each other across the expansion and contraction mechanism on the base 1,
At least one set of two wires 40, 41, each of which is housed so that its other end can be pulled out from within the telescopic mechanism after passing through the rotation regulating mechanism;
42, 43, this rotation regulating mechanism includes two pulleys 38, 39 rotatably supported with their axes aligned, and a mechanism fixed to each pulley 38, 39 with their axes aligned. differential gears 36 and 37 and both differential gears 3
intermediate differential gears 34 and 35 that mesh with the respective pulleys 6 and 37 to match the circumferential speeds of both pulleys 38 and 39 and restrict the rotational directions of both pulleys 38 and 39 in opposite directions; Wire 40, 41, 42, 4
3, after bringing them into contact with the outer periphery of each pulley 38, 39, the pipes 17, 2 constituting the expansion/contraction mechanism are connected.
Guide members 47, 50,
46, 49 to pass between the pipes 17, 20, 21 by alternately reversing them, and each other end is elastically connected to the pipe 17 at the base of the telescopic mechanism. lift device.